MXPA97006039A - Paper applicator containing a convertible coating in ab - Google Patents

Abstract

An applicator is described for inserting a substance into the body's interior. The applicator is especially useful for inserting a catamenial plug into a woman's vagina. The applicator includes a tubular member formed of at least one layer of paper, which has an outer surface. The tubular member is capable of containing the substance which is to be inserted. The outer surface of the tubular member is covered with a coating convertible into compost. The coating is composed of at least 85% by weight of a polymeric material, at least 10% by weight of additives and up to about 5% by weight of a residual monomer.

Description

PAPER APPLICATOR CONTAINING A CONVERTIBLE COVER EM FERTILIZER FIELD OF THE INVENTION This invention relates to a coated paper applicator for inserting a substrate into a body cavity and an apparatus and to a method for forming the applicator. More specifically, this invention relates to a paper applicator having a convertible coating on fertilizers on an outer surface, which provides the applicator with a low coefficient of friction.

BACKGROUND OF THE INVENTION Currently, there are many different types of applicators, which are used to insert a substance into a body cavity. A common applicator is a plug applicator, which is used by women to insert a plug into their vagina during the menstrual period. Other common applicators are used to insert suppositories, creams or similar to the vaginal area or into other body cavities.

Plug applicators are commonly constructed of either a water insoluble plastic, such as polyethylene or multiple layers. of paper, cardboard or cardboard. Plastic applicators can be injection molded and are preferred by certain women due to their smooth and slippery outer surface which provides ease and comfort during insertion. Plastic applicators may present a disposal problem in the sense that they should not be thrown into the toilet, but rather should be thrown away in a trash can instead. Plastic applicators also imply environmental concerns in the sense that some plastics are slow to biodegrade and most are not convertible into compost.

Paper applicators, on the other hand, are drainable and exhibit good biodegradability characteristics. The drainable feature is highly desired by most women, since it provides discrete means for the disposition of the used applicator. However, most current paper applicators are not as comfortable to insert as a plastic applicator. In addition, paper applicators usually do not exhibit the glossy, smooth aesthetic appearance of a plastic applicator. Even when the outer surface of the paper applicator is coated, it lacks the characteristic of being slippery and does not have the low coefficient of friction characteristic exhibited by the plastic applicators. In addition, many paper applicators are coated with a non-convertible coating.

Now a paper stopper applicator has been invented, which has a convertible coating on its outer surface, which closely approximates the aesthetic appearance of a plastic applicator and which has a lower friction coefficient than that of a plastic applicator. plastic applicator.

SYNTHESIS OF THE INVENTION Briefly, this invention relates to the paper applicator for inserting a substance into a body cavity and an apparatus and to a method for forming the applicator. The applicator is especially useful for inserting a catamenial plug into a woman's vagina. The applicator includes an elongate tubular member formed of at least one layer of paper which has an outer surface. The tubular member is capable of containing the substance to be inserted. The outer surface of the tubular member is coated with a compost-convertible coating which is composed of at least 85% by weight of a polymeric material, at least 10% by weight of additives, and up to about 5% by weight of a residual monomer. The coating provides the tubular member with a dry coefficient of kinetic friction ranging from between about 0.62 to about 0.86 and a wet coefficient of kinetic friction ranging from about 0.59 to about 1.12. The low dry and wet coefficient of the friction values facilitates the insertion of the applicator into the body cavity.

The general object of this invention is to provide a paper applicator containing a coating that can be composted to insert a substance into a cavity into the body. A more specific object of this invention is to provide a paper stopper applicator having a coating that can be composted on an outer surface thereof that provides the applicator with a low coefficient of friction.

Another object of this invention is to provide a plug applicator formed of a single layer of paper and having an outer coating which reduces friction during the insertion of the applicator into the vagina of the woman.

A further object of this invention is to provide a paper applicator with a coating which provides the applicator with a low coefficient of friction in both, a dry state and a wet state.

Still another object of this invention is to provide a coated paper applicator which is more comfortable to use.

Still another object of this invention is to provide an apparatus which can coat a paper layer efficiently and economically.

Still further, an object of this invention is to provide a paper applicator with a polylactide coating which contains a lactide monomer, a nucleating agent, an antioxidant or stabilizer, an elasticizer, an anti-bulking agent, a slip agent and a water purifier Still further, an object of this invention is to provide a method for coating the outer paper layer and forming the paper in a tubular member.

Other objects and advantages of the present invention will be more apparent to those skilled in the art with regard to the following description and the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is an elevated view of a paper applicator having a coating convertible into compost on the outer surface thereof.

Figure 2 is a cross-sectional view of the paper applicator shown in Figure 1 exhibiting the presence of a plug and showing the telescopic assembly of the inner and outer tubes.

Figure 3 is an enlarged cross-sectional view of a tubular applicator constructed of three layers of paper and having a coating convertible into compost on the outer surface of the outer paper layer.

Figure 4 is a cross-sectional view of a portion of the tubular wall of an applicator constructed of eight layers of paper and having a coating convertible into compost on the outer surface of the outer paper layer.

Figure 5 is a cross-sectional view of a paper applicator exhibiting the presence of an outer tube having both inner and outer surfaces and an inner tube having an outer surface which is coated.

Figure 6 is a schematic view of an apparatus used to slot-coat a paper layer.

Figure 7 is a flow chart of a method used to form the paper applicator having a coating applied to a surface thereof.

DETAILED DESCRIPTION OF THE PREFERRED MODALITIES Referring to Figures 1 and 2, an applicator 10 is shown which is capable of delivering a substance into the body cavity. A "substance" is defined as that which has mass and occupies a space. A substance can be a physical structure such as a plug, a capsule such as a suppository, or a medicament in the form of an ointment, a gel, a cream, a solid, etc. For the purpose of discussion, the applicator 10 will be shown in the form of a plug applicator, which is designed to house a catamenial plug 12 and provide a comfortable means for inserting the plug 12 into a woman's vagina.

While this invention will be described with reference to a plug applicator, it should be recognized that the applicator 10 can be used to insert suppositories or to deliver medicaments, such as an infection ointment, creams or the like into a woman's vaginal area. The applicator 10 can also be used to deliver some other substance into the body cavity or on the skin of a human or animal.

A tampon is an absorbent member primarily designed for use by a woman during her menstrual period to absorb menstrual fluids, blood and other body fluids. The plug 12 can be made of natural or synthetic fibers, including cellulose fibers, such as cotton or rayon, or artificial fibers, such as polyester, polypropylene, nylon or mixtures thereof. The mixture of cotton or rayon fibers works well. Other types of materials can also be used such as. cellulose sponge or a sponge formed of elastomeric materials.

The cap 12 is normally compressed in the shape of a cylinder and may have a blunt, rounded or nose-shaped front end 14, the cap 12 commonly having a withdrawal rope 16 fastened to one end thereof which serves as a means for removing the clogged plug of a woman's vagina. The withdrawal rope 16 can be tied through an aperture 18 formed transversely through the cap 12. In addition, the withdrawal cord 16 can have a knot 20 formed at its free end to ensure that the cord 16 will not separate from the cap 12. The applicator 10 includes a first member 22 and a second member 24. The first member 22 is commonly referred to as an outer tube and is in the form of an elongated hollow tube which is dimensioned and configured to temporarily contain and retain a substance, for example. example, a plug 12 which is to be inserted inside the body cavity. The first member 22 can be straight or curved along its length. The second member 24 is commonly referred to as an inner tube or plunger and may be in the form of a solid stick or an elongated hollow tube. The second member 24 can be telescopically slidable within the first member 22 and is designed to eject the plug 12 of the first member 22 as it moves inside the outer tube 22. The second member 24 can be straight or curved along its extension.

It should be noted that even when the applicator 10 is exhibited by a pair of interacting telescopic members, it may consist of a single tubular member where the user will use one of those fingers or an independent plunger to expel a substance from the tubular member into the the body cavity The first member 22 of the applicator 10 has the first and second spaced apart ends 26 and 28, respectively, the first member 22 is shown as being formed of a single layer or layer of material 30. The layer 30 can be made of paper, of cardboard, cartonboard or a combination thereof. The words "paper, cardboard or paperboard" are used herein to mean a thin sheet material made of cellulose pulp which is derived mainly from wood, rag and from certain plants, including leaves and grasses. Although the first member 22 may consist of a single layer or layer of material 30 which is wound, wound, spirally wound convolutely or sewn longitudinally into a hollow tubular configuration, it is also possible to employ two or more layers, especially where the Stiffness is a concern.

It should be noted that when two or more layers are present, different materials may be used for each layer if desired. The thickness of the single stratum 30 should vary from about 0.0055 inches to about 0.015 inches (about 5.5 mils to about 15 mils), preferably from about 0.008 inches to about 0.013 inches (about 8 mils a) about 13 mils) and more preferably from about 0.01 inches to about 10 mils. Referring to the. Figure 3 shows an alternative embodiment of an applicator 32 in which a tubular member 34 is constructed of 3 separate layers and layers of paper, cardboard or card stock 36, 38 and 40. The layers 36, 38 and 40 can made of the same materials, of similar materials or different materials and each may have the same properties, similar properties or different properties. For example, each stratum 36, 38 and 40 can have a similar or different weight of cardboard, thickness, density, etc. The paper, cardboard and card stock layers 36, 38 and 40 should be able to provide the requisite stiffness to the applicator 32 for its intended purpose. The thickness of each inner layer 38 and 40 should vary from about 0.002 inches to about 0.007 inches (about 2 mils to about 7 mils), preferably the thickness will be about 0.004 inches (about 4 mils). The outer paper layer 36 should have a thickness of between about 0.0015 inches to about 0.005 inches (about 1.5 mils to about 5 mils) preferably between about 0.0015 inches to about 0.002 inches (about 1.5 mils to about about 2 mils), and more preferably about 0.0016 inches (about 1.6 mils). The general wall thickness of the paper layers 36, 38 and 40 will vary from about 0.0055 to about 0.0155 inches (about 5.5 mils to about 15.5 mils), preferably about 0.01 inches (about 10 mils) .

Referring to Figure 4, a third embodiment is shown in which a wall part 42 of an applicator is constructed of 8 different or separate layers or layers of materials 43, 44, 45, 46, 47, 48, 49 and 50. WHATEVER number of strata between one and eight can be used with three to five strata being preferred. The use of fewer layers or layers helps reduce the overall cost of the applicator 10 and significantly simplifies the manufacturing process. It is also advantageous to use a ground and inexpensive wood paper for the inner layers and to use a thinner and more refined refined paper for the outer layer. The ground wood paper must have a thickness and weight of paperboard greater than that of the outer paper layer because its purpose is to add stiffness and stiffness to the applicator at a nominal cost.

The various layers or layers used to form the tubular applicator 32 or 42 can be wound, spirally wound, convolutely wound or longitudinally sewn into a hollow tubular member 34 or 42. The individual layers 36, 38 and 40 or 43-50 can be glued together with an adhesive to retain the tubular shape. The adhesive must be a water soluble adhesive, such as to allow the different layers to delaminate when the applicator 32 or 42 is exposed to water. This will facilitate the disposition of the 32 or 42 applicator by leaving it to the one who leaves the toilet. A water-based adhesive also improves the biodegradability of paper applicator 32 or 42. Suitable adhesives include polyvinyl acetate and dextrin with polyvinyl acetate being preferred because of their ability to resist delamination under wet storage conditions. Suitable polyvinyl acetate adhesives are commercially available from National Starge Company, having an office at 10 Finderne Avenue, P.O. Box 6500, Bridgewater, New Jersey 08807.

When the wall of the tubular member 34-42 is formed it is preferred that the seam formed in each layer or stratum during winding is off-center from the seams formed in the adjacent layers or layers. In addition, in order to reduce the cost the inexpensive inner layers 38 and 40 or 44-50 can be formed from a durable milled paper while the outer layers 36 and 36 respectively in the two different embodiments can be formed from a bleached kraft paper. , a bleached sulphite paper or a sheet of milled wood paper having a relatively smooth surface. The outer paper layer 36 or 43 should be formed of a white paper. The high degree of whiteness improves the aesthetic appearance of the applicator. The outer paper layer 36 or 43 should also exhibit a high strength and should generally be more rigid than any of the other inner layers. The reason for this is that the paper layer 36 or 43 must have a sufficient strength to allow a coating to be applied thereto and to roll free of wrinkles.

Referring again to Figures 1 and 2, the layer of material 30 which forms the first member 22 has an outer surface 52. This outer surface 52 is covered with a cover convertible into compost 54. By "convertible into compost" is desired say that the coating will be converted into fertilizer in a deposit to convert fertilizer and will not release its harmful products. When degraded the coating produces carbon dioxide (CO,), water and humus. The polylactide coating requires moisture and the bacteria to degrade. The coating 54 is also biodegradable. By "biodegradable" it is meant that the coating is capable of being decomposed by natural biological processes. The Random House Dictionary of English Language, Second Edition, copyright 1987 defines as "biodegradable" on page 209 that something is "capable of rotting through the action of living organisms." In addition, the coating is resistant to water. By "water resistance" it is meant that the coating is resistant even when it does not completely prevent the penetration of water. Since the coating 54 is applied to the outer surface 52 as a very thin layer, the applicator 10 can be discarded by depositing it in a toilet. The thin layer of the coating 54 will not prevent the paper layer 30 from breaking in the water but may increase the time necessary for this to occur.

The coating 54 can be applied to the paper layer 30, before, during or after the material is rolled or wound in the tubular configuration. Preferably, the coating 54 is applied to the paper layer 30 before it is wound, rolled or sewed on a tubular member. The coating 54 can be applied to the exterior surface 52 by spraying, melt spraying, extrusion, slot coating, grid printing, or by using other methods known to those skilled in the art. The groove coating is a method that works especially well since it allows a very thin uniform coating to be applied at reasonable production rates for this invention, it is critical that the coating 54 be applied so that it is very thin and uniform. The reason for this is that a very thin coating will reduce the cost of the finished applicator 10, will allow any petals that are to be formed on the end of the insertion of the applicator 10 to flex under reasonable force, and will not prevent the applicator 10 break in the water. The coating is advantageous since it facilitates attention to both values of low coefficient of wet and dry friction.

The coating 54 is composed of at least 85% by weight of the polymeric material, at least 10% by weight of additives and up to about 5% by weight of a residual monomer. A preferred polymeric material is a polylactide with the residual monomer being a lactide monomer. Polylactide is available from Cargill Incorporated with an office at 15407 McGinty Road, Wayzata, MN 55391-2399. The polylactides identified by the code numbers 520 HR and 520 HRXE work well. The polylactide has a molecular weight ranging from about 100,000 to about 300,000.

Residual monomer is present in amounts of up to about 5% but does not require a monomer to be present if it can be removed from the polymer. Usually, it will be present from about 0.1 to about 5% by weight of a residual monomer. The less monomer is present, the better. The residual monomer may be a lactide monomer when the polymer material is polylactide. The lactide monomer is a lactic acid or lactic acid dimer when one polymerizes the polylactide, some residual monomer will normally be present in the finished polymer. The technology available today to polymerize a material normally produces a polymer with up to about 5% by weight of a monomer. If one wishes to reduce the level of monomer left in the finished polymer to below about 5 percent by weight, one will have to use additional process steps or carry out the process under more severe conditions. Any alternative is expensive to implement and usually requires additional equipment and / or more time. The reduction of residual monomer down the range of from about 0.1 to about 5% by weight is not easy. It is important for this invention that one minimize the amount of residual monomer remaining after the polymerization to less than about 5% by weight, preferably less than about 4% by weight and more preferably less than about 3% by weight. weight.

The polylactide coating of this invention also contains the following additives: a nucleating agent, a stabilizer or antioxidant, a plasticizer, an antiblocking agent, a slip agent and a water scavenger. It is important that all six of the additives are present. The reasons for including these additives and the amounts of such additives are described below. The nucleating agent must be present since it increases the crystallization kinetics of the polylactide. It is well known that polylactide crystallizes very slowly, and usually over a period of time of several hours or even days. So, the addition of a nucleating agent is required to allow the polylactide coating to settle quickly once it is applied onto the paper substrate in a commercial high-speed process. The nucleating agent should be present in an amount ranging from about 1 to about 5% by weight, preferably about 3% by weight, and more preferably about 2% by weight. A nucleating agent which works well is an adipic acid.

The second additive is the antioxidant or the stabilizer. The antioxidant is added to the polylactide polymer because it is beneficial in reducing the degradation caused by high temperatures during processing, thus preventing the coating from becoming discolored or yellowing. It is preferred that the coating be transparent, not opaque. Since polylactide is extremely vulnerable to thermal degradation, it is extremely important that an antioxidant is present. The antioxidant should be present in an amount ranging from about 1 to about 5% by weight, preferably less than about 3% by weight, preferably less than about 2% by weight. Examples of two commercially available antioxidants are those sold under the trademarks "ULTRANOX" and "IRGANOX". The ULTRANOX® is sold by GE Specialty Chemicals Inc., having an office in Parkersburg Center, 5 * Avenue and Avery Street in Parkersburg, WV and IRGANOX® is sold by Ciba-Geigy Corporation having an office in Ardsley, NY.

The first additive is the plasticizer. The plasticizer is required to reduce the viscosity of the melt of the polylactide polymer so that it has better flow characteristics and is easier to extrude from the commercial extruder. The plasticizer also allows the coating to exhibit a flexibility so that after it has been coated on a paper substrate, the paper substrate can be worked in various geometrical configurations without deforming the coating, for example, cracking it, exhibiting stress fractures, etc. The plasticizer should be present in an amount ranging from about 6 to about 15% by weight, preferably from about 6 to about 12% by weight, and more preferably from from about 6 to about 10% by weight. An example of a commercially available plasticizer is sold under the trademark "CITROFLEX" A-4 by Morflex, Inc. of Greensboro, NC.

The fourth additive is the antiblock agent. Antiblock people are added to the polylactide polymer to prevent the coating from adhering to itself or to another substrate. For example, the antiblocking agent will edit the coating to stick to the back side of a coated paper after the paper has been wound onto a supply roll. The antiblock agent must be present in an amount ranging from about 0.5 to about 10% by weight, preferably from about 2 to about 9% by weight, and more preferably from about 3 to about 10% by weight. 8% by weight. An example of a commercially available antiblock agent is sold under the trademark ULTRATALC® of Minerals Technologies, Inc. having an office at 235 E. 42nd Street, New York, New York.

The fifth additive is the slipping agent. The slip agent is required to reduce the moisture coefficient and dryness of the friction values of the polylactide coating. The slipping agent is able to migrate to the surface of the coating and therefore lower both the wet and dry coefficient of friction values. The plasticizer should be present in an amount ranging from about 1 to about 10% by weight, preferably from about 2 to about 10% by weight, and more preferably, from about 3 to about 10% by weight. An example of a commercially available slipping agent is erucamide sold under the ARMOSLIP® trademark of AKZO having an office at 300 S. Riverplaza, Chicago, Illinois 60175.

The last additive is the water scrubber. The water scrubber is required to prevent hydrolysis of the polylactide. This is achieved by having water scrubbers molecularly bonded with the water molecules thus preventing the water from interacting with the polymer. The water scrubber must be present in an amount ranging from about 0.5 to about 5% by weight, preferably from about 0.5 to about 3% by weight, and more preferably from about 0.5 to about 2%. % by weight. An example of a commercially available water scrubber is under the "STABAXOL" brand of Bayer AG having an office in Leverkusen, Germany.

The coating 54 is directly bonded to the outer surface 52 of the paper layer 30 that forms the first member 22. A method that without coating a hot, continuous liquid stream of a thermoplastic resin over the outer paper layer by means of slotting. Taction causes the coating 50 to thermally adhere to the surface 52 of the paper layer 30 as it cools. Once the ambient temperature is cooled, it is essentially impossible to separate the coating 54 from the layer 30 without removing the cellulose fibers from the paper layer 30.

When the coating 54 is applied to an applicator which is to be used as a plug applicator, it is critical that the coating has a uniform thickness. By "uniform thickness" it is meant that the coating has a thickness which varies by not more than ± 25 percent on the surface to which it is applied. Preferably, the thickness of the coating 54 will not vary by more than ± 20 percent on the outer surface 52 to which it is applied and more preferably the thickness of the coating 54 will not vary by more than i 15 percent on the outer surface 52 to which tone applies.

It should be noted that the thickness of the coating described above refers to the outer surface 52 of the applicator 10. However, the coating can also be applied to an interior surface, and when applied, it is important that the coating be applied in a manner that it has a uniform thickness. A uniform thickness will allow the cap 12 to be ejected from the applicator 10 at a low ejection force.

For a plug applicator constructed of one or more layers of paper, the coating 54 must be thin. It is important that the coating 54 have a thickness of between about 0.3 mils to about 1.0 mils. Preferably, the coating 54 will have a thickness of between about 0.4 mils to about 0.6 mils, and more preferably the thickness of the coating 54 will be about 0.5 mils. It is critical that the coating has a thickness of less than about 1. 0 mils in order to keep the cost low and ensure that the coating has a sufficient thickness to achieve the purpose for which it was applied.

In the art of coating, the thickness of the coating is typically mentioned in "mils" one thousand equals 0.001 inches. Therefore, the overall thickness of a coated applicator wherein a single layer of paper 30 to a thickness of between about 5.5 mils to about 6 mils is coated with a material, for example, a film coating, having a thickness of between about 3 mils to about 10 mils will produce an applicator having a thickness of about 8.5 mils to about 26.5 mils. For a three-layer applicator as shown in Figure 3, where the thickness of all three layers varies from about 5.5 mils to about 16.5 mils and the thickness of the coating is from about 3 mils to about 10 mils, will produce an applicator having a general thickness of between about 8.5 mils to about 26.5 mils too. For a multi-layer applicator as shown in Figure 4, the overall thickness of the applicator 42, of the paper layers plus the coating, may be greater than about 26.5 mils.

The first function of the coating 54 is to give the applicator 10 a pleasing aesthetic appearance. From the aesthetic point of view, the coating 54 must render the exterior surface of the applicator smooth and transmit a satiny and slippery texture. Tcomposition of the coating 54 should be such that its smoothness is not degraded by moisture, for example, it should not become sticky to the touch. The characteristic of smoothness is extremely important since it is directly related to the ease and comfort a woman experiences when inserting the plug applicator into her vagina and then removing the plug applicator from the vagina. The smoothness of a particular coating can be measured in several different ways. The most common ways to measure the smoothness of a material are by measuring the surface parameters, such as the dry and wet coefficient of the kinetic frictions or by examining the surface smoothness using electron microscopy, contact angle, etc.

A second function of the coating 54 is that it must provide the paper layer 30 with a gloss or gloss so that it takes on a glossy or glossy appearance. The appearance should be similar to that of a plastic applicator.

A third function of the cover 54 is that it must provide the first member 22 with a low coefficient of friction. The "coefficient of friction (COF)" as used herein and as defined, is generally a measure of the relative difficulty when the surface of a first material slides on the surface of itself or on the surface of a second material. For other purposes, we are concerned with the coefficient of kinetic friction when a surface moves relative to a second surface. The coefficient of kinetic friction is usually lower than the coefficient of static friction. A high coefficient of friction denotes a low slip between two contacting surfaces while a low coefficient of friction denotes a high slip between the two contacting surfaces. A low coefficient of friction is desirable when an applicator is inserted into and / or removed from a body cavity.

A standard test procedure which can be used to measure the coefficient of kinetic friction of a particular coating is described in the book "American Society for Testing and Materials" (ASTMD) 1894-90. This test procedure is entitled "STANDARD TEST METHOD FOR STATIC AND SYMMETRICAL COEFFICIENTS OF FRICTION OF PLASTIC FILM AND SHEETS". The samples to be tested should be acclimated approximately two hours before being tested in a controlled environment of 23 ° C ± 1 ° C and a relative humidity of 50 + 2 percent. The coefficient of the kinetic friction test must follow the procedure identified above ASTM with the following exceptions. First a porcelain plate is placed on the metal sheet that forms the "plane" on which the sled moves. This change is made so that friction measurements can also be used to simulate the situation where a coated plug applicator drains into a toilet. The surface of a toilet is porcelain and the use of a porcelain surface on the sled will simulate the actual conditions more closely. The lower the coefficient of friction value, the easier it will be for the applicator to flow through the drain pipes and the toilet traps. A test was carried out to determine the value of "(dry coefficient of kinetic friction)" of a single layer of ground wood coated with a polylactide coating, as described above. By "dry friction coefficient" it is meant that the samples were tested according to the ASTND 1894 procedure without having been moistened with a liquid.

The milled wood has a thickness of around 2. 5 mils and the polylactide coating had a uniform thickness of about 5 mils ± 25%. Each sample was of a size of 63.5 millimeters by 114.3 millimeters. Each test sample was held in sequence to the 63.5 mm by 63.5 mm sled by a two-sided tape and the excess material was wrapped around the sides and the top surface of the sled in the transverse direction. The dimension of 63.5 millimeters was in the direction of the machine and the dimension of 114.3 millimeters was in the transverse direction (CD). It should be noted that the coating was applied to each sample in the direction of the machine.

Each test sample was measured against its dry coefficient of kinetic friction value and the results were displayed as a line in a graphic record. This line was then arbitrarily divided into five vertical lines equally spaced into six equal parts. The values in each of the five vertical lines were averaged to obtain a single data point. Five locations were taken to give a more representative measurement for each test sample that goes over its displacement distance. Each data point was referred to as a coefficient of dry friction and the results are listed in Table 1 given below. A total of 25 test samples were measured.

A second test was carried out to determine the "kinetic friction wet coefficient (COF)" value of a single layer of ground wood coated with a polylactide coating as described above. By "wet COF" it is meant that the samples were tested in the presence of deionized water. The deionized water had an electrical resistance of 18 MW (megaohms) and a surface tension of 70.8 dies per centimeter. In order to run this test, a prey of a material formed around the outer perimeter of the porcelain plate. The dam had a vertical height of approximately 12.7 millimeters. The dam enclosed a rectangular area of about 317.5 millimeters by about 152.4 millimeters. Approximately 90 ± 5 milliliters of deionized water was poured onto the porcelain plate so that it completely wetted the porcelain plate. This sample was then tested in sequence using the methodology described above and the results are listed in Table 1 given below. A total of 25 test samples were measured.

A third and a fourth test were carried out to determine the dry and wet coefficient of the kinetic friction values of the "PLAYTEX" "SILK GLIDE" samples. The "PLAYTEX" and the "SILK GLIDE" is a commercially available paper stopper applicator sold by Playtex Family Products Corporation of Stanford, Connecticut. This paper applicator is constructed of two layers of paper with a two-layer film coating applied to the outer paper layer. The coating consists of an inner layer of a polyethylene film having a thickness of about 0.5 mils and an outer layer of a polyester film having a thickness of about 0.5 mils. The "PLAYTEX" paper applicator was unrolled, starting from the longitudinal seam, on a planar sheet and the two-layer film was then separated from the outer paper layer. The film was then attached to the 63.5 mm by 63.5 mm sled with the outer polyester film layer facing the porcelain surface. Each sample was tested for dry COF and wet COF and the results are listed in Table 1 given below. A total of 25 test samples were measured for a dry COF and a wet COF.

TABLE 1 SAMPLE PLA DRY SILK GLIDE PLA SDK? DRY DRY HUMID MOIST 1 0.62 0.43 0.69 0.79 2 0.64 0.46 0.85 0.83 3 0.64 0.40 0.76 0.94 4 0.66 0.44 0.82 0.87 5 0.73 0.41 0.83 0.87 6 0.70 0.40 0.95 0.91 7 0.74 0.43 0.89 0.94 8 0.71 0.42 1.02 0.91 9 0.72 0.43 0.91 1.05 10 0.69 0.41 0.88 0.99 11 0.73 0.46 0.93 0.95 12 0.77 0.44 1.04 0.94 13 0.86 0.47 1.07 1.04 14 0.80 0.43 1.06 1.02 15 0.84 0.44 1.04 0.95 16 0.83 0.45 0.98 0.93 17 0.78 0.45 1.03 0.97 18 0.72 0.45 1.08 1.01 19 0.79 0.48 1.02 0.94 20 0.79 0.43 1.05 1.10 21 0.81 0.45 1.08 1.14 22 0.82 0.51 1.12 1.00 TABLE 1 (Continued) SAMPLE PLA SECO SILK GLIDE PLA SDK (HE DRY WET HUMID 23 0.80 0.49 1.10 1.09 24 0.80 0.48 0.93 1.08 0.77 0.42 0.92 0.89 Average 0.75 0.44 0.96 0.96 Standard deviation 0.07 0.03 0.11 0.07 Note: 1. "PLA" is an abbreviation for polylactide. 2. "Std. Dev. Standard" is an abbreviation for Standard Deviation.

The test data indicated "that the polylactide coating 54 provided the applicator with both a wet and low coefficient of kinetic friction coefficient. The coefficients of dry friction coefficient for the polylactide coating 54 ranged from 0.62 to 0.86. It is critical to this invention that the dry COF value should be less than about 80, and more preferably, the dry COF value should be less than about 0.75.

The wet COF values for the polylactide 54 coating varied from 0.69 to 1.12. It is critical to this invention that the coefficients of wet friction should be less than about l.O and more preferably less than about 0.96. These low coefficients of dry and wet friction facilitate the insertion and removal of the applicator in and out of the body cavity.

The above test data also mention that the two-layer coating of "Playtex" "Silk Glide" of polyethylene / polyester provided the applicator with both a low dry kinetic friction coefficient value and a low wet kinetic friction coefficient value . The dry friction coefficient values for the polyester coating ranged from 0.40 to 0.51. The coefficient of friction values varied from 0.79 to 1.14. Even though the dry and wet coefficient of friction values overlap the dry and wet coefficient of the kinetic friction values of the present invention, one should note "that the coatings are different. First, our coating of the invention is convertible into compost while the coating "Playtex" and "Silk Glide" is not. Second, the coating of this invention is a single layer film while the coating of "Playtex" "Silk Glide" is a two layer film. This allows the coating of the invention to be applied in an easier and less expensive way. Third, the coating of the present invention has a chemical composition different from that of the "Playtex" "Silk Glide" coating. This different chemical composition allows our coating of the invention to be applied in a single operation against a dual operation. Fourth, our coating of the invention gives an applicator a satin finish, which is aesthetically pleasing in appearance, while the "Playtex" "Silk Glide" coating gives an applicator a glossy finish. Finally, the coating of the present invention can be applied to a single layer of paper to form an acceptable applicator while the "Playtex" has chosen to apply its coating to an applicator formed of two layers of paper.

Referring again to Figure 2, the applicator 10 is constructed of two slidable members and the outer surface of both the first member 22 and the second member 24 are coated. The first member 22 has a coating 54 formed thereon and the second member 24 has a coating 56 formed thereon. Both coatings 54 and 56 are identical but these should be different if desired. The coating 56 on the second member 24 reduces the friction between the first and second members, 22 and 24 respectively. This is important because when a woman inserts the applicator into her vagina, she actually squeezes the first member 22 so that its circular cross section acquires an oval configuration. This change in geometry can significantly increase the first and second frictional forces 22 and 24, respectively. As the frictional force is increased, additional force is required to adequately expel the plug 12 from the outer tube 22.

Referring now to Figure 5, there is shown another embodiment of the applicator 58 wherein the paper layer 30 has an inner surface 60 which has a coating 62 formed thereon. The reference numbers in Figure 5 are identical to those used in Figures 1 and 2. By coating the inner surface 60 of the first member 22, one can ensure that the second member 24 will easily slide there. To ensure maximum performance, the outer surface of the second member 24 can also be coated as to reduce the expulsion force necessary to eject the plug 12 of the first member 22.

APPARATUS Referring to Figure 6, an apparatus 64 will now be taught which is useful for coating the paper applicator 12, 32 or 58. The apparatus 64 may vary depending on the kind of paper to be coated as well as the shape and of the final size of the paper applicator. For most applicators, it is better to coat the paper layer which will form the outer surface of the applicator before it is assembled into a tubular member. If one wishes to coat the inner surface of the applicator as well, then the layer of paper which will form this surface must also be coated before assembly. It is also possible to vary the apparatus 64 slightly so that it can simultaneously coat the opposite major surfaces of a paper fabric, if desired.

A quick way to coat the paper can be achieved by using the apparatus 64. The apparatus 64 includes a first drive mechanism 66 which is capable of supporting a supply roll 68. The supply roll 68 contains a continuous strip of paper no. Coated 70. Por "continuous" means a finite amount of paper from which a plurality of applicators 10, 32 or 58 can be formed. The uncoated paper 70 contains two major surfaces 71 and 73. One or both of these major surfaces 71 and 73 It can be coated either in sequence or simultaneously.

The first drive mechanism 66 supports a rotating spindle 72. The supply roll 68 of the uncoated paper 70 is mounted on the spindle 72 which can be driven at a speed determined by the first drive mechanism 66 or it can be made to rotate through the force exerted thereon to remove the uncoated paper 70. Before turning on the apparatus 64, a leading edge of the uncoated paper 70 is first put on a first guide roller 74, a coating roll 76, a cooling roller 78, a second guide roller 80 and then fastened to a take-up roller 82.

As is known to those skilled in the art, multiple guide rollers may be used on the apparatus 64 if necessary. It is sometimes advantageous to arrange the guide rollers in pairs having a narrow clamping point formed therebetween. In Figure 6, the guide rollers 74 and 80 are not used in a pairwise relationship.

The first guide roller 74 is positioned between the first drive mechanism 66 and the cover roller 76 and serves to properly align the uncoated paper strip 70, which is unwound from the supply roll 68. It is important that the strip of paper 70 is suitably oriented in relation to a coating roller 76. The second roller 80 is positioned between the cooling roller 76 and the second driving mechanism 86. Like the first guide roller 74, the second guide roller 80 also serves to properly align the coated paper strip 98 so that it can efficiently and quickly roll over the take-up roll 82. The second guide roll 80 can be a variable arched roll as sold by Mount Hope, a division of BTR. Paper Group having an office at 15th Fifth Avenue, Taunton, MA 02780.

The take-up roller 82 is mounted coaxially on a drive spindle 84 which can be rotated by a second drive mechanism 86. The second drive mechanism 86 allows the coated paper 88 to be rewound on the take-up roll 82 to a predetermined speed and under adequate tension.

It has been found that a typical line speed using the apparatus 84 is between about 100 feet per minute (FPM) at about 1200 feet per minute. A more preferred line speed is from between about 250 feet per minute to about 600 feet per minute, a more preferable line speed is around 500 feet per minute. The line speed may vary depending on the type of paper being coated, the particular composition of the liquid resin, the viscosity of the resin, the thickness of the coating, etc.

Referring again to the coating roll 76, it is beneficial to form a smooth surface 77 on the outer periphery of the coating roll 76. This can be achieved by coating or adhering a silicone rubber material on the outer periphery of the coating roll 76. The smooth surface 77 allows the paper strip 70 to pass over the surface of the coating roll 76 with a minimum amount of slippage. The soft surface 77 also facilitates the transfer of a predetermined amount of coating onto the uncoated paper 70 because this helps to control the clamping point opening formed with the associated coating mechanism.

The apparatus 64 also includes a slot coater 90 containing a slot die 92. The slot die 92 has an outer surface which is angularly aligned, for example, at an angle alpha, with the cover roll 76 so that a The clamping point or narrow opening is present between the slot die 92 and the cover roll 76. This opening must be wide enough to allow the cover 70 to pass therethrough. An opening or fastening point of less than about 1.3 millimeters, and preferably less than about .25 millimeters is sufficient for most applications where the thickness of the coating to be applied is less than .0 mils . The exact size of the opening can vary depending on the thickness of the paper to be coated, the viscocity of the coating resin, the type of equipment used, the speed of the equipment, etc.

It should be noted that when the coating roll 76 has a smooth surface 77, that an opening or fastening point may not be visibly present because the coating roll 76 will abut the slot die 92. However, the surface soft 77 on the coating roller 76 is capable of being depressed so that the paper strip 70 can pass between the slot die 92 and the coating roll 76.

A predetermined amount of polylactide 94 resin, in the pellet form, is contained in a storage drum 96. The polylactide resin pellets are of a solid material which may vary in shape and contour but will normally have a cylindrical shape and They will be around 3.18 millimeters long. The solid pellets are directed through the supply conduit 98 to a sealed resin dryer 100. In the resin dryer 100 the pellets are raised in temperature to expel any moisture that may be present. The pellets are heated to a temperature ranging from about 38"C to about 66" C. A more preferred amount at which the pellets are heated is around 55 ° C.

The pellets heated and dried still in solid form are then directed through a conduit 102 to a sealed hopper 104 without being exposed to the atmosphere. It is important not to expose the pellets to the atmosphere to prevent additional moisture from contacting the pellets. From the sealed hopper 104 the pellets are fed by gravity into an extruder 106. The extruder 106 contains an internal elongated and rotating screw (not shown) which is designed to move the solid pellets, which enter the extruder 106 from the hopper 104 through the extruder 106 already outside an outlet 108 in a continuous stream of melted material. The extruder 106 also contains one or more heating zones in which the temperature is increased in sequence, such as to transform the solid resin pellets into a melted material. In Figure 6, extruder 106 is shown having three labeled heated zones 110, 112 and 114. The extruder may contain additional zones if desired.

In the first heating zone, the polylactide resin 94 is heated to a temperature of about 160 ° C as it moves to the resin 64 it is advanced towards the outlet 108 by means of the internal screw, the resin will be transformed from a solid to a melted liquid. For example, in the second heating zone 112, the resin 94 is raised by about 218 ° C and the third heating zone 114 rises to around 246 ° C. The exact temperature at which the resin 94 is heated in each of the heating zones 110, 112 and 114 may vary depending on the equipment of one, the composition of the resin, the length of displacement of the screw, etc.

After the third heating zone 114, the melted resin 94 passes through a throat 116 where it can be heated a few degrees more. For example, the polylactide resin 94 can rise to around 252 'C in the throat 116. At the outlet of the throat 116 is a filter 118 which can perceive any lumps or debris that may be present. Upon exiting the outlet 108 of the extruder 106, the melted polylactide resin passes through a hose 120 to the slot coater 90. In the slot coater 90 the temperature of the melted resin is maintained and the resin moves forward. through the slot die 92 at a certain pressure. The liquid resin 94 is then supplied in the form of a sheet or liquid stream of film through the slot die 92. The thickness of the liquid resin 94 applied to the uncoated paper 70 can vary by the size and configuration of the film. the opening formed in the slot die 92, as well as by the internal pressure exerted on the liquid resin 94 by the operation of the slot coater 90. When the liquid resin 94 is applied to the uncoated paper 70, the paper 70 is coated as indicated by the number 88.

It should be noted that the outer surface of the slot die 92 may be aligned at an angle alpha (a) relative to the surface of the uncoated paper 70 which is to be contacted by the liquid resin 94. The alpha angle (a) it may vary from about 0ß to about 10 ° in relation to a vertical line AA which is pulled tangentially to the outer periphery of the coating roll 76 at a point where the uncoated paper 70 passes between the slot die 92 and the coating roll 76, see Figure 6. Preferably, the angle alpha (a) is from about 1 to about 5 ° relative to the vertical line AA. More preferably, the angle alpha (a) is about 3 ° in relation to the vertical line A-A. The purpose of angularly aligning the other surface of the slot die 92 relative to the platen roll 76 is to obtain a more uniform and smoother transfer of the resin 94 onto the paper 70. The light angular orientation accomplishes this function. It should be noted that those skilled in the slot coating can interpret the phrase "the outer surface of the slot coater" to be the same as the phrase "the slot coater itself".

The temperature and the viscosity of the liquid resin 94 may vary, however for the coating composition described above, the temperature should vary from about 148 ° C to about 204 ° C. A temperature of from about 154 ° C to about 177 ° C is more preferred, and a temperature of about 163 ° C is more preferred.

A uniform thickness of the liquid resin 94 should be deposited on the continuous strip of paper 70 as it is displaced through the opening or point of clamping formed between the groove matrix 92 and the coating roll 76. The thickness of the coating can be adjusted by varying the speed of the moving paper 70, the size of the opening formed in the slot die 92, the internal pressure exerted on the liquid resin 94, the viscosity of the resin 94, the temperature of the resin 94, etc. One or more of these parameters can be adjusted to precisely control the thickness of the coating which is applied to the coated paper 88.

After the melted resin 94 is deposited on the passing paper 70, the coating is cooled by passing the paper 88 over the surface of the cooling roller 78. The resin 94 is cooled to at least a partially solidified state. Preferably, the resin 94 is cooled to a solid consistency before being rolled onto the take-up roll 82. One or more sequentially arranged cooling rolls can be used to more efficiently cool the resin 94. In Figure 6, only one cooling roll 78 is exhibited. The cooling roller 78 can be cooled with water or with any other type of commercially available cooler. It is more efficient for the process when the cooling roller 78 is maintained at a temperature of less than about 38"C. Preferably, the cooling roller 78 is maintained at a temperature of from about 5 ° C to about 27 ° C. C. More preferably, the cooling roller 78 is maintained at a temperature of from between about 10"C to about 24" C and more preferably, the cooling roller 78 is maintained at a low temperature of about 21 ° C. The exact temperature below 100"F at which the cooling roller 78 is maintained, will be dictated by one's particular equipment, the operating speeds, the type of resin, the temperature of the resin, etc.

It should be noted that the cooling roller 76 can also be cooled or maintained at room temperature so that the cooling roller 78 is aided in the cooling of the hot resin 94. In addition, one can employ other means of cooling the hot resin. 94, such means being known to one skilled in the art. After being cooled, the coated paper 88 is directed and rolled onto the take-up roll 82.

It should be noted that if one wishes to coat both major surfaces 71 and 73 of the paper strip 70 simultaneously, this is possible. This can be achieved by installing a second slot coater and the second cover roll adjacent the first slot coater 90. Other variations may be made to the apparatus 64 to suit the particular requirements of one. Alternatively, one can run the paper-coated strip 88 back through the apparatus 64 and coat the uncoated surface 73 to obtain a strip of paper which is coated on both major surfaces 71 and 73.

Referring to Figure 7, there is shown a flow diagram which illustrates a method for coating one or more layers of paper 70 and then forming the coated paper 88 in a plug applicator 10, 32 or 58. The method includes the steps of directing an uncoated paper strip 70 past a coating mechanism 90. The paper 70 which can be unwound from a supply roll 68 up to the shape of a continuous strip or ribbon. The paper strip 70 has a pair of opposingly aligned major surfaces 70 and 73. A single layer of a meltable thermoplastic resin convertible to compost 94 is applied on at least one of the major surfaces 71 and / or 73 of the paper 70 to form a strip of a coated paper 88. The resin 94 is normally applied to the paper strip 70 at a temperature of from about 204 ° C to about 260 ° C. The resin 94 can be applied on only one major surface 71 or 73 or on both major surfaces 71 or 73. The one that covers one or both of the major surfaces 71 and / or 73 the strip paper 70 will depend on whether one wants the finished article to be coated on only one interior surface 60 or on one surface outside 52 or if one wants the one having both coated surfaces 52 and 60.

See Figures 2 and 5. One way to apply a uniform resin coating 94 on the paper strip 70 is by a groove coating.

The method further includes cooling the hot resin 94 to a state at least partially solidified. Resin 94 can be cooled to a temperature of from about 5 ° C to about 38 ° C. Alternatively, the resin 94 can be cooled down to room temperature.

When one wishes to coat both major surfaces 71 and 73 of the paper strip 70 in a sequential operation, one can direct the paper 88, which is coated on a surface 71, back through the coating mechanism. This method is indicated by the dotted line labeled 100 in Figure 7. Alternatively, the uncoated paper strip 70 may be coated on both major surfaces 71 and 73 by two slot coaters arranged downwardly from each other.

After the resin 94 has at least partially solidified, and preferably completely, the coated paper strip 88 is wound on a hollow tubular member. If it is desirable to have the coating appearing on the outer surface of the article, the coated paper strip 88 is wound so that the coating will appear on the outer surface. The tubular member may consist of a single layer of coated paper 88 or it may be constructed of two or more layers of paper, cardboard, paperboard or some other material such as a thermoplastic film wherein at least one layer is coated over at least one surface. The use of two or more layers is beneficial to give the applicator 10, 32 or 58 the required stiffness or its intended purpose. When more than one layer is required, the coated paper strip 88 can be adhesively attached to one or more layers of similar or different materials. The coated paper strip 88 should be attached to the other layers so that the coated surface appears on either the outer surface or the inner surface of the finished applicator. If both the outer surface and the inner surface have been coated, then the two coated paper strips will be required to form the finished applicator.

It should be noted that when an applicator 58 of a single layer of paper is to be constructed and both inner and outer surfaces of an applicator are to be coated, this is obtained by coating both surfaces of the paper strip 70. The coated paper 88 then it is rolled, rolled or stitched longitudinally in a tubular configuration.

It is possible to wind the coated paper strip 88 parallel to its length to form an elongated hollow tubular member. The tubular member can then be cut into predetermined lengths to form applicators having the first and second ends. Alternatively, the coated paper strip 88 can be cut into individual segments which are then rolled, wound or longitudinally sewn into tubular and hollow members. In this alternate process each tubular member can be wound either parallel or initial perpendicular to the paper strip. It is also possible to wind convolutely the coated paper 88 at an angle relative to the initial length of the paper strip.

Once the paper strip is wound on a tubular member, the paper is sealed or bonded together to retain its shape and form the applicator. This can be achieved in several ways including the use of an adhesive or gum, by ultrasonic bonding, by bonding with heat or pressure or bonding with both heat and pressure, or by any other means known to those skilled in the art.

For some applicators, it will not be necessary to configure one or both ends in order to facilitate the expulsion of the substance from them. However, for plug applicators, in particular it is advantageous for the smooth and comfortable operation of the applicator that at least one end of said applicator is shaped in a particular manner. In the case of a plug applicator, the first end of the applicator is formed in an approximately rounded nose shape configuration. This rounded configuration can be semicircular, frusto-conical or used as seen in a side profile. The tip, which is normally smaller in diameter and rounded, facilitates the comfortable insertion of the applicator into the woman's vagina. Along with this configuration, the end of the applicator, the second end can also be worked or formed in a finger grip ring simultaneously or sequentially. It should be noted that the second end of the applicator can be formed before forming the first end if desired. The grip ring with the finger assists the user by providing a surface which acts as a stop for his fingers. The finger grip ring will prevent the fingers from sliding off the outer surface of the applicator as the plunger is pushed inward to eject the plug inside the vagina.

For a two-piece applicator, a plunger is mounted telescopically at the second end of the outer tube, see Figures 1 and 2. The first end of the applicator is then opened and a substance, such as the plug is inserted there. The first end is then closed again. The applicator is now ready to facilitate the dispersion of the substance within the body cavity or on the surface of the skin. This is achieved by pushing the plunger into the applicator and causing it to be expelled into the substance or plug outside the first end of the applicator.

Although the invention has been described in conjunction with several specific embodiments, it should be understood that many alternatives, modifications and variations will be apparent to those skilled in the art in light of the foregoing description. Therefore, this invention is intended to encompass all those alternatives, modifications and variations which fall within the spirit and scope of the appended claims.

Claims (24)

1. An applicator comprising: a) a tubular member formed of a single layer of paper and having an outer surface, said tubular member is capable of containing a substance which is to be inserted into a body cavity, and b) a coating applied to said outer surface, said coating being a layer of a material convertible into compost and comprising at least 85% by weight of a polymeric material, 10% by weight of additives, and up to about 5% by weight of the residual monomer.

2. The applicator as claimed in clause 1, characterized in that said polymeric material is polylactide.

3. The applicator as claimed in clause 1, characterized in that said coating provides said tubular member with a value of dry kinetic friction coefficient varying from 0.62 to 0.86.

4. The stopper applicator as claimed in clause 1, characterized in that said additives include a nucleating agent, an antioxidant or stabilizer, a plasticizer, an antiblocking agent, a slipping agent or a water scavenger.

5. The plug applicator as claimed in clause 4, characterized in that said nucleating agent is present in said coating in an amount ranging from about 1 to about 5% by weight.

6. A plug applicator comprising: a) at least one elongated tubular member formed of at least one layer of paper and having an outer surface; Y b) a coating applied to said outer surface of said tubular member, said coating being a single layer of a compostable material and said coating comprising at least 85% by weight of polylactide, at least 10% by weight of additive and to about 5% by weight of a residual monomer, said coating providing said tubular member with a dry coefficient of kinetic friction ranging from 0.62 to 0.86.

7. The plug applicator as claimed in clause 6, characterized in that said coating has a uniform thickness.

8. The plug applicator as claimed in clause 6, characterized in that said coating has a thickness of between about 0.3 to about 1.0 mils.

9. The plug applicator as claimed in clause 6, characterized in that said additive includes a plasticizer in an amount of from between about 6 to about 15% by weight.

10. The plug applicator as claimed in clause 6, characterized in that said additive includes an antioxidant in an amount of from between about 1 to about 5% by weight.

11. A plug applicator comprising: a) an elongated tubular member formed of at least two layers of paper, said tubular member having an outer surface; and b) a coating applied to said outer surface of said tubular member, said coating being a single layer of a compostable material and said coating comprising at least 85% by weight of polylactide, at least 10% by weight of additives, and up to about 5% of a residual monomer, said additives include a nucleating agent, an antioxidant or stabilizer, a plasticizer, an antiblocking agent, a slipping agent and a water scavenger.

12. The plug applicator as claimed in clause 11, characterized in that said coating has a thickness of less than about 1 mils and said coating provides said tubular member with a dry coefficient of kinetic friction ranging from 0.62 to 0.86. and a wet coefficient of kinetic friction varying from from 0.69 to 1.12, and said values of coefficient of dry and wet kinetic friction facilitate the insertion of said applicator into the body cavity.

13. The plug applicator as claimed in clause 11, characterized in that said tubular member has a dry kinetic friction coefficient value of less than 0.80.

14. The plug applicator as claimed in clause 11, characterized in that the tubular member has a wet kinetic friction coefficient value of less than 1.0.

15. The plug applicator as claimed in clause 11, characterized in that said additive includes a nucleant agent in an amount of from about 1 to about 5% by weight.

16. The plug applicator as claimed in clause 11, characterized in that said additive includes an antioxidant in an amount of from about 1 to about 5% by weight.

17. The plug applicator as claimed in clause 11, characterized in that said additive includes a plasticizer in an amount of from about 6 to about 15% by weight.

18. The plug applicator as claimed in clause 11, characterized in that said additive includes an antiblocking agent in an amount of from about 0.5 to about 10% by weight.

19. The plug applicator as claimed in clause 11, characterized in that said additive includes a slipping agent in an amount of from about 1 to about 5% by weight.

20. The plug applicator as claimed in clause 11, characterized in that said additive includes a water scrubber in an amount of from about 0.5 to about 5% by weight.

21. An applicator comprising: a) a tubular member formed of a single layer of paper and having an inner surface, said tubular member is capable of containing a substance, which is to be inserted into a body cavity; Y b) a coating applied to said inner surface of said tubular member, said coating being a single layer of a compostable material and said coating comprising at least 85% by weight of a polymeric material, at least 10% by weight of additives and from about 0.1 to about 5% by weight of a residual monomer, said additives including a nucleating agent, an antioxidant or stabilizer, a plasticizer, an anti-blocking agent, a slipping agent and a water scavenger .

22. The applicator as claimed in clause 21, characterized in that said polymeric material is a polylactide.

23. The plug applicator comprising: a) at least one elongated tubular member formed of at least one layer of paper and having an inner surface; Y b) a coating applied to said inner surface of said tubular member, said coating being a single layer of a compostable material and said coating comprising at least 85% by weight of a polylactide, at least 10% by weight of additives, and from about 0.01 to about 5% by weight of a residual monomer, said coating providing said tubular member with a dry coefficient of kinetic friction, varying from between 0.62 to 0.86 and a coefficient of wet kinetic friction, varying from from 0.69 to 1.12, and said values of low dry and wet kinetic friction coefficient facilitating the insertion of said applicator into the body cavity.

24. A plug applicator comprising: a) an elongated tubular member formed of at least two layers of paper, said tubular member having an inner surface; Y b) a coating applied to said inner surface of said tubular member, said coating being a single layer of a compost material and said coating comprising at least 85% by weight of a polylactide, at least 10% by weight of additives and from about 0.1 to about 5% by weight of a residual monomer, said coating having a thickness of less than about 0.7 mils and said coating providing said tubular member with a dry kinetic friction coefficient varying from 0.62 to 0.86 and a coefficient of wet kinetic friction ranging from 0.69 to 1.12 and said low coefficient of dry and wet kinetic friction coefficients facilitate the insertion of said applicator into the body cavity.