JPH0132791B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a transfer paper and a method for producing a decorative material using the same.

2. Description of the Related Art A transfer printing method using transfer paper is already known as a printing method. A very common transfer paper consists of a base, a peelable layer, and a printing layer, and in addition to these, a protective layer, adhesive layer, etc. are provided as necessary.These transfer papers are made of synthetic leather. ,
It is used for printing on soft PVC, plywood, ceramics, metal, glass, etc., especially when printing on materials and shapes that are difficult to directly print clearly, or when printing in small quantities at one time. Moreover, when there are a large number of patterns, the transfer printing method using transfer paper is convenient because it saves preparation time for printing and cleaning up after printing, and there is no need to change plates when changing patterns. It is.

Most of the printed matter obtained by the transfer printing method using conventional transfer paper is a flat print, but if you want to obtain a pattern that stands out from the printing material after transfer printing, such a pattern can be transferred. This is usually done by using ink with a high solid content when forming on paper, or by printing with a printing method that transfers a large amount of ink. However, when using ink with a high solid content, the viscoelasticity of the ink changes, which is unfavorable in terms of printing suitability, and printing methods that require a large amount of ink transfer, such as silk screen printing, intaglio printing, deep gravure printing, etc. When using this printing method, there is a disadvantage that the drying speed after printing is slow.
Furthermore, when the transfer paper is manufactured by sheet-fed printing and stacked, or manufactured by rotary printing and wound up, it also has drawbacks such as the printed pattern being crushed and the substrate being deformed.

In addition, conventional transfer paper with a foam-suppressing pattern is known, but controlling the stage of foaming reduces the variation in the plate depth of the plates used and provides a clear stage for use. Even if the amount of the foam-suppressing compound in the ink is controlled, it is difficult to maintain the foam-suppressing ability of the foam-suppressing pattern of the transfer paper over a long period of time. When producing a decorative material that has many concave areas in terms of area, it is necessary to use a large amount of an expensive foaming-inhibiting compound to produce transfer paper, and the resulting transfer paper has the disadvantage of being prone to blocking after being rolled up. It is not suitable for patterns with a small area of convex parts, and even if the above-mentioned transfer paper is used, it is possible to create concave parts that are concave from the surface after foaming, but it is not suitable for patterns with convex parts that protrude from the surface after foaming. It was not possible to set up a

The present invention solves the above-mentioned drawbacks of the conventional transfer paper by configuring the scope of claims, and
We succeeded in obtaining a foamed decorative material having convex portions and concave portions.

The present invention will be explained in detail below.

Known substrates, releasable layers, ordinary printed layers, other printed layers, protective layers, and adhesive layers may be used in the present invention.

First, the substrates include paper such as tissue paper, parchment paper, and kraft paper, polyethylene film, polypropylene film, polyvinyl chloride film, polyvinylidene chloride film, polyvinyl alcohol film, polyethylene terephthalate film, polycarbonate film, nylon film, polystyrene film, and ethylene film. A vinyl acetate copolymer film, an ethylene vinyl alcohol copolymer film, a plastic film such as an ionomer, a foil of aluminum, copper, tin, iron, lead, etc., or an appropriate composite of each of the above base materials may be used. sell.

Next, examples of the releasable layer include those formed mainly of a suitable vehicle, or those formed by a known coating method or printing method using a releasable paint further containing silicone or wax. Vehicles constituting the peelable paint include cellulose derivatives such as ethyl cellulose, ethyl hydroxyethyl cellulose, cellulose acetate propionate, and cellulose acetate, polystyrene, styrene resins and styrene copolymer resins such as polyα-methylstyrene, polymethyl methacrylate, Single or copolymer resins of acrylic or methacrylic resins such as polyethyl methacrylate, polyethyl acrylate, polybutyl acrylate, rosin, rosin ester resins such as rosin-modified maleic acid resin, rosin-modified phenolic resin, polymerized rosin, poly Using one or more of vinyl acetate resin, coumaron resin, vinyl toluene resin, vinyl chloride resin, polyester resin, polyurethane resin, butyral resin, polyamide resin, vinyl chloride-vinyl acetate copolymer resin, etc., in the above vehicle. Plasticizers, stabilizers, dispersants, extender pigments, solvents, and diluents are appropriately added and kneaded, and further wax or silicone is added to make a releasable paint, or using the above releasable paint. Methods for providing a releasable layer on the substrate include gravure coating, roll coating, air knife coating, kiss coating, spray coating, continuous coating, dip coating, spinner coating, wheeler coating, brush coating or gravure printing, and gravure offset printing. This can be carried out by printing methods such as lithographic offset printing, dilithography, letterpress printing, intaglio printing, silk screen printing, and electrostatic printing.

Alternatively, polyethylene resin,
The peelable layer may be provided by melt extrusion of a resin such as polypropylene resin or ethylene-vinyl acetate copolymer resin.

The above-mentioned releasable layer is selected and provided as appropriate in consideration of the adhesion and releasability between the base material and the heat-foamable pattern and normal printing layer described below. If the substrate originally has releasability, it is not necessary to provide a releasable layer, and examples of such substrates include films or sheets of polyethylene, polypropylene, polyester, nylon, and the like.

The heat-foamable pattern formed on the surface of a substrate or the surface of a peelable layer of a substrate having a peelable layer on the surface as described above is a heat-foamable pattern formed by mixing a foaming agent into an ink using an appropriate vehicle. Examples include those formed by a known printing method using ink.

As the vehicle constituting the foamable ink, those listed above as the vehicle constituting the releasable paint can be used, and in addition to these vehicles, plasticizers, stabilizers, dispersants, extender pigments, dyes and pigments can be used. Colorants, solvents and diluents are added as appropriate, and inorganic blowing agents such as sodium bicarbonate, ammonium carbonate, sodium boron hydride, silicon oxyhydride, azodicarbonamide, azobisisobutyronitrile,
Organic blowing agents such as dinitrosopentamethylenetetramine, paratoluenesulfonylhydrazide, 4,4'-oxybisbenzenesulfonylhydrazide, etc., and microballoons (or microspheres) containing gas or low-boiling organic solvents, etc. ) to 100 parts by weight of vehicle, preferably 2 to 8
The foaming ink is prepared by adding parts by weight and kneading, and the methods of printing using the foaming ink as described above include known gravure printing, gravure offset printing, lithographic offset printing, dilithography, letterpress printing, and intaglio printing. Examples of printing methods include printing, jet printing, silk screen printing, electrostatic printing, etc., and gravure printing and silk screen printing, which have a relatively large amount of ink transfer, are preferred, but in the present invention, the foaming pattern is By doing so, the pattern part protrudes, so there is no need to increase the amount of transfer significantly compared to normal printing conditions, and in gravure printing, the plate depth of the gravure plate is 100 to 250 μm, preferably 200 to 220 μm. Yes, in silk screen printing, the number of screen lines is 100 to 20 lines/
inch, preferably 40 to 20 lines/inch.

Next, regarding the foam suppression pattern, the foam suppression pattern is formed using a composition containing a compound that prevents the decomposition of the foaming agent or inhibits the action of the foaming promoter that promotes the foaming of the foaming agent. Such compounds, that is, foam suppressants, are described in Japanese Patent No. 578566 (Japanese Patent Publication No. 43-28636), and examples thereof include maleic acid, fumaric acid, adipic acid, and 1,2-phthalic acid. Organic acids, especially organic acids containing at least two carboxyl groups and one hydroxyl group and having 2 to 12 carbon atoms: Organic acid halides having 2 to 20 carbon atoms, especially acid chlorides: 2 to 2 carbon atoms 20 organic acid anhydrides: polyhydric aromatic alcohols with 2 to 20 carbon atoms and ketones having 2 functional groups: saturated amines with 3 to 12 carbon atoms or unsaturated 6- to 10-membered ring amines, etc. According to
For example, a foaming agent, a foaming aid, and a stabilizer used in the heat-foamable base material of the transfer material are selected and used in combination with a foaming agent that has the effect of increasing the foaming temperature, and an appropriate vehicle, such as the above-mentioned peelable layer, is used. From among the vehicles listed as vehicles for the releasable paint constituting the releasable paint, select one that has adhesion to the transfer material, heat resistance, and physical properties suited to the intended use. Furthermore, coloring agents for pigments or dyes, plasticizers, stabilizers, dispersants,
Examples include those produced by a known printing method using an anti-foaming ink prepared by adding and kneading extender pigments, solvents and diluents as appropriate.

In addition to the above, the transfer paper of the present invention may be provided with a normal pattern using normal ink, and the normal pattern, heat-foamable pattern, and foam-suppressing pattern may include, for example,
They can be provided by suitably adjusting and matching them by a method such as providing each unit of the same printing machine.

Next, a method for manufacturing the decorative material of the present invention using the transfer paper of the present invention as described above will be explained.

First, the patterned surface of the transfer paper of the present invention is brought into contact with a heat-foamable material to transfer the heat-foamable pattern made of the heat-foamable ink and the foam-suppressing pattern made of the foam-suppressing ink to the material. .
As the heat-foamable material, an unfoamed material made by adding a foaming agent to a thermoplastic synthetic resin and forming it into a film or sheet by an appropriate method can be used. Examples of the thermoplastic synthetic resin include polyolefins such as polyethylene and polypropylene: Synthesis of polyolefin copolymers such as ethylene-vinyl acetate copolymers, ionomers, ethylene-vinyl alcohol copolymers, polystyrene, polyvinyl chloride, polyvinyl acetate, vinyl chloride-vinyl acetate copolymers, nylon, acrylic, etc. A resin is used, and the foaming agent is selected from the same foaming agents as those used in the heat-foamable ink that forms the heat-foamable pattern described above, depending on the softening point, foaming temperature, or foaming temperature of the synthetic resin used, or the foaming agent that forms the foam-suppressing pattern. In addition, plasticizers, stabilizers, colorants such as pigments or dyes, foam accelerators, lubricants, antistatic agents, ultraviolet absorbers, etc. are selected as appropriate. Using a heat-foamable resin composition obtained by kneading,
For example, the above may be applied by a known coating method such as gravure coating, roll coating, air knife coating, kiss coating, spray coating, continuous coating, dip coating, spinner coating, wheeler coating, brush coating, solid coating by silk screen, wire bar coating, etc. A heat-foamable resin composition is applied to the printed surface of the transfer paper, or a suitable support carrier such as asbestos sheet, paper, especially glass fiber mixed paper, woven fabric, especially glass fiber woven fabric, non-woven fabric, especially A method of coating and drying a glass fiber nonwoven fabric, and then bringing the printed surface of the transfer paper into contact with the coated surface and applying heat and pressure to transfer;
Alternatively, the heat-foamable resin composition described above is applied to the surface of an appropriate releasable support carrier, and if necessary, it is composited with the above-described support carrier, dried, and the releasable support carrier is peeled off, and then the releasable support carrier is removed. The patterned surface of the transfer paper is brought into contact with the heat-foamable material by a method of transferring the transfer paper by contacting the peeled surface with heat and pressure. Transfer the texture pattern and the foaming suppression pattern. When transferring by applying heat and pressure in the above, it is best to use a heat press or a heat roll.The transfer conditions vary depending on the transfer paper and heat-foamable material, but when using a heat press, The heating plate temperature is 150℃~200℃, the pressure is 50~70Kg/ ^cm2 ,
When using a heat roll, the surface temperature of the heat roll is 180℃.
~220℃, linear pressure between the heated roll and the opposing roll through the transfer paper and heat-foamable material 8-10
Kg/cm.

After transferring the heat-foamable pattern and the foam-suppressing pattern to the heat-foamable material as described above, a transparent protective layer is applied to protect the surface of the decorative material after it is made into a product, if necessary, and then the whole is heated. The heat-foamable material is foamed. To provide a transparent protective group, a synthetic resin similar to that used in the heat-foamable resin composition described above is used, and a plasticizer, stabilizer, lubricant, antistatic agent, ultraviolet absorber, etc. are appropriately added and kneaded. It can be provided using a transparent resin composition by a method similar to the method for applying the heat-foamable resin composition described above. In order to heat the entire material and foam the heat-foamable material, a known means such as a hot air stove or a far-infrared heater is used, and the heating conditions are a combination of the synthetic resin, plasticizer, and foaming agent that make up the heat-foamable material. , depending on the blending ratio, 180℃~200℃,
The required time is 1 to 3 minutes.

Since the present invention has the above configuration, the heat-foamable pattern provided on the transfer paper of the present invention can be formed without using an ink with a particularly high solid content, and therefore the viscoelasticity of the ink is favorable for printing. range, and there is no disadvantage of slow drying speed.
In addition, the transfer amount of heat-foamable ink, which expands when heated, does not need to be increased compared to printing conditions using normal pattern ink, so heat-foamable patterns can be formed with a small thickness, and transfer paper When it is manufactured by a sheet-fed printing method and deposited, or manufactured by a rotary printing method and wound up, the printed pattern is not crushed, and the releasable substrate is deformed and difficult to peel off during transfer. Moreover, compared to the case where a pattern is formed on transfer paper using only a conventional foaming inhibitor, there is less stickiness on the printed surface of the suppression ink due to the use of a large amount of foaming inhibitor only. It can also be used for overprinting such as multicolor printing using colored inks, and blocking does not occur after winding.

Furthermore, according to the method for producing a decorative material of the present invention, a decorative material having a convex portion further protruding from the surface of the heat-foamable material that has been foamed and expanded by heating, and a recessed portion recessed from the surface of the heat-foamable material is once produced. It can be provided by the transfer process of 1, and since the resulting convex portion is formed by transferring and foaming a heat-foamable pattern made of heat-foamable ink, it is similar to that formed by foaming a heat-foamable material. In addition to the concave pattern created by the anti-foaming ink, there is no disadvantage that only the convex portions are worn compared to when the convex portions are formed using ink with a high solid content.
The convex pattern created by the heat-foamable ink, which itself heat-foams, is formed so as to protrude from the surface of the heat-foamable material, so compared to the conventional method of forming a concavo-convex pattern by adjusting the amount of foaming inhibitor. The contrast of the uneven pattern is large, making it possible to express a clearer pattern, and because it does not use only a foaming inhibitor that has the property of reducing the suppressing effect due to changes over time such as moisture absorption from the air, the uneven gradation It has the effect of being able to produce a decorative material with a uniform and stable uneven pattern that does not easily change, and the method for producing the decorative material of the present invention is a method of manufacturing the so-called Kekikaru emboss method, which is conventionally carried out using transfer paper. It can be easily carried out using a production line for cushion floors, wallpaper, etc., and the resulting decorative materials such as cushion floors, wallpaper, etc. have delicate and interesting convex and concave portions.

Examples are given below to more specifically illustrate the present invention.

Example: Extrude on the surface of high-quality paper (basis weight 50g/m ² )
A release layer made of polypropylene resin is provided with a thickness of 25 μm using the Zion coating method, and a pattern is printed on the release layer using gravure printing using a vinyl chloride-vinyl acetate copolymer resin-based gravure ink for PVC printing. After that, a foam-suppressing pattern was printed using a foam-suppressing ink prepared by adding 80 parts by weight of trimellitic anhydride as a foaming inhibitor to 100 parts by weight of the vehicle to the same PVC printing ink. Using a foaming ink prepared by adding and mixing 5 parts by weight of azodicarbonamide as a foaming agent to 100 parts by weight of vehicle to a PVC printing ink similar to the above, foaming patterns were printed by gravure printing, I created a transfer paper.

On the other hand, a heat-foamable composition with the following composition was applied to asbestos paper with a thickness of 0.7 mm by the knife coating method, heated at a temperature of 160°C for 1 minute and dried, and then the printed surface of the transfer paper was brought into contact with the surface. Layer them together in this way, and use a heating roll with a surface temperature of 200℃.
After transferring the pattern by heating and pressing at a linear pressure of 8 kg/cm and a speed of 0.1 m/sec, the release paper consisting of the high-quality paper and the release layer was peeled off.

Heat-foamable composition polyvinyl chloride resin 100 parts by weight (Kaneka Vinyl Paste, Kaneka Chemical Industry Co., Ltd.)
PSL-37A) Dioctyl phthalate 50 〃 Epoxy soybean oil 2 〃 Calcium carbonate 10 〃 TiO ₂ 3 〃 ZnO 2 〃 Azodicarbonamide 3 〃 After the transfer, overlay the pattern-transferred surface and apply transparent PVC plastisol with a wire bar. usage, thickness
Apply to a thickness of 0.2mm, then heat the entire surface to 200℃.
When heated for 2 minutes and foamed, a decorative material was obtained in which the foaming pattern part protruded and became a convex part, and the foaming suppressing pattern part became depressed and became a concave part, and the obtained decorative material was excellent as a flooring material. It had a good appearance and good wear resistance.

Claims (1)

[Scope of Claims] 1. A heat-foamable pattern made of a heat-foamable ink that expands when heated and a foam-suppressing pattern made of a foam-suppressing ink are formed on the releasable surface of a releasable substrate. transfer paper. 2 Heat-foamable pattern and foaming of transfer paper formed by forming a heat-foamable pattern made of a heat-foamable ink that expands by heating and a foam-suppressing pattern made of a foam-suppressing ink on the releasable surface of a releasable substrate The pattern forming surface provided with the suppression pattern is brought into contact with the heat-foamable material to transfer the heat-foamable pattern and the foam-suppression pattern to the heat-foamable material, and then the heat-foamable material is heated and foamed. , a convex pattern made of heat-foamable ink protruding from the surface of the heat-foamable material after foaming on the area to which the heat-foamable pattern has been transferred;
1. A method for producing a decorative material, which comprises forming a concave pattern made of foam suppressing ink, which is depressed from the surface of a heat-foamable material after foaming, on a portion to which a foam suppressing pattern has been transferred.