WO2002098572A1 - Method for coating thread rubber and the like with adhesive in coating line and adhesive coater - Google Patents

Abstract

A first invention is characterized in that in a coating line including a step of coating a flat rubber or a thread rubber which are running with an adhesive, the adhesive is supplied into a rubber running slit opened in the bottom and the front and rear in the forward direction of the coating line, and that the rubber running slit has a guide function of restricting the adhesion position of rubber and the like in the lateral direction of a base on the coating line by a position in the lateral direction of the coating line. A second invention is characterized in that an adhesive is supplied at least from one side face of a rubber running slit in addition to the supply of the adhesive from the top face of the rubber running slit to coat at least two faces of the thread rubber and the like passing through the rubber running slit. A third invention is an apparatus for coating a thread rubber and the like with an adhesive which is characterized by providing a first distribution mechanism and a second distribution mechanism which includes vertical flow-dividing passage facing an adhesive lateral supply passage of the first distribution mechanism and a distribution reservoir continuos with to the lower end of the vertical flow-dividing passage and facing a rubber running slit and by coating three faces of the thread rubber and the like passing through the rubber running slit with the adhesive.

Description

 Specification

 Method and apparatus for applying adhesive to thread rubber and the like in an application line

 The present invention relates to an application line including a step of applying an adhesive to flat rubber, thread rubber, and the like (for example, a disposable diaper production line including a step of automatically bonding thread rubber to a diaper body), flat rubber, thread rubber, and the like. The present invention relates to an adhesive application method and an adhesive application device. Background art

 Japanese Patent Application Laid-Open No. 6-2777251 discloses a “disposable diaper” to which an elastic member such as thread rubber, flat rubber or the like is attached, with reference to FIG. In addition, a spiral spray coating method is applied to apply a hot melt adhesive to a plurality of thread rubbers or the like.

 When the hot melt adhesive is applied to the thread rubber etc. by applying the spiral spray coating method, the adhesive area of the hot melt adhesive is small and the adhesive strength is weak, resulting in the necessity of reducing the application amount. The adhesive oozes out of the nonwoven fabric (the mating substrate), and the hot melt adhesive comes into contact with the baby's skin when using disposable diapers.

 An object of the present invention is to obtain a wide adhesive surface with a small amount of adhesive in order to solve the above-mentioned problems. In addition, in an application line including a step of applying an adhesive to flat rubber, thread rubber, and the like (for example, a disposable diaper manufacturing line including a step of automatically bonding thread rubber to a diaper body), a flat rubber, An object is to simplify a guide mechanism for a supply position of thread rubber or the like. Disclosure of the invention

 The first invention of the present application is directed to a rubber running slit groove having a bottom surface, a front surface and a rear surface opened in a coating line advancing direction in a coating line including a step of applying an adhesive to running flat rubber and thread rubber. The rubber running slit groove is supplied to the rubber running slit groove in a state where the rubber thread and the like are tensioned and the rubber running slit groove is horizontally penetrated. Adhesive coating for applying adhesive to thread rubber, etc., characterized by having a guide function to regulate the bonding position of rubber and the like in the cross direction of the base material on the coating line according to the position of the coating line in the cross direction. Provide a way.

According to the second invention of the present application, in a coating line including a step of applying an adhesive to a running flat rubber or a thread rubber, the rubber is bonded to a rubber running slit groove having a bottom surface, a front surface and a rear surface opened in the application line traveling direction. In a state where the rubber thread is supplied in a tensioned state and the rubber running slit groove is horizontally passed through the rubber running slit groove, the front and rear surfaces of the rubber run are opened in the traveling direction. The adhesive is supplied to the slit groove, and the supply of the adhesive to the thread rubber and the like is performed in addition to the supply from the upper surface of the rubber traveling slit groove and the supply from at least one side surface of the rubber traveling slit groove. An adhesive may be applied to at least two surfaces of thread rubber or the like passing through the rubber running slit groove. And a method for applying a contact adhesive to thread rubber or the like.

 The third invention of the present application has an adhesive supply hole at an upper part thereof, an adhesive lateral supply path at an intermediate part thereof, and forms a first distribution mechanism through which the adhesive is supplied from the adhesive supply hole. A coating head main body having a plurality of rubber running slit grooves formed in a vertical direction in a portion thereof; and a plurality of vertical branch flow paths facing the adhesive horizontal supply path of the first distribution mechanism of the coating head main body. A distribution plate forming a second distribution mechanism having a distribution reservoir that is continuous with the lower end of the vertical dividing channel and that faces the rubber running slit groove of the coating head main body; Provide an apparatus for applying an adhesive to thread rubber, etc., characterized by applying an adhesive to three surfaces of thread rubber, etc. passing through a rubber running slit groove.

 Fig. 1 is a front view of a coating head on a disposable diaper manufacturing line. Fig. A shows the case of applying the adhesive to multiple thread rubbers, and Fig. B shows bonding to a single flat rubber. This shows a case where the present invention is applied to an agent application process.

 Fig. 2 is a front view of a coating line for manufacturing disposable diapers.

 Fig. 3 is a plan view of the same.

 Fig. 4 is a longitudinal sectional view of the coating head.

 Fig. 5 is also a front view.

 Fig. 6 is a side view.

 FIG. 7 is an explanatory view of a first distribution mechanism.

 FIG. 8 is an explanatory view of a second distribution mechanism.

 FIG. 9 is a cross-sectional view taken along line SI-S1 of FIG.

 FIG. 10 is a sectional view taken along line S2-S2 in FIG.

 FIG. 11 is an explanatory diagram of the flow of the adhesive during the coating operation.

 FIG. 12 is an explanatory diagram of the flow of the adhesive by the first distribution mechanism and the second distribution mechanism during the coating operation.

 FIG. 13 is an explanatory view of an adhesive applied state to flat rubber according to the present invention.

 FIG. 14 is an explanatory view of a state in which an adhesive is applied to the thread rubber in the same manner.

 FIG. 15 is an illustration of the flow of the adhesive showing the extrusion type valve action for intermittent application.

 FIG. 16 is an explanatory view of the flow of the adhesive, also showing a suction-type valve action.

 FIG. 17 is a perspective view of a disposable diaper showing products to which the present invention is applied. BEST MODE FOR CARRYING OUT THE INVENTION

 The present invention will be described in detail based on embodiments of the present invention shown in the drawings.

 Fig. 1 to Fig. 3 show the application line including the step of applying adhesive to flat rubber, thread rubber, etc., and the application of adhesive to the disposable diaper manufacturing line, including the step of automatically adhering thread rubber to the diaper body. 9 shows an embodiment to which the present invention is applied.

Elastic body forming point (adhesion point of thread rubber etc.) in the belt-shaped diaper body 22 during transfer of the upper surface of the conveyor 21 of the manufacturing line B, thread rubber etc. A running, A rubber thread A or the like is supplied which is located above the diaper main body 22 and travels in a state where the adhesive application points e thereof are aligned with each other and in a tension state by the tension roller 23 above the band-shaped diaper main body 22.

 After the pressing step F and the cutting step G, the band-shaped diaper main body 22 is cut, and the thread rubber etc. A is adhered to the band-shaped diaper main body 22 only at the elastic body forming portion E to form the elastic body K. Disposable diapers ”20 are completed.

 In the disposable diaper of FIG. 17, R indicates an upright wall made of an elastic body K formed of thread rubber.

 In the above-mentioned application line B, the first invention of the present application is carried out in a step of applying an adhesive to thread rubber or the like for supplying A such as flat rubber or thread rubber to which an adhesive is intermittently applied.

 The dispensing head B supplies adhesive to the rubber running slit groove 10 with the bottom surface, the front surface and the rear surface opened in the dispensing line advancing direction, and penetrates the thread rubber A and the rubber running slit groove 10 in the horizontal direction under tension. Supply it in the state where it was made.

 In FIG. 1A, a plurality of rubber running slit grooves 10 are provided, and an adhesive is applied to a plurality of thread rubbers A or the like. Based on the positions of the plurality of rubber running slit grooves 10, the mutual distances P1, P2 of the thread rubber A and the positional relationship P3 with the base material (the band-shaped diaper body 22) are regulated, and the rubber running slit grooves are formed. 10 serves as a guide.

 In FIG. 1B, the rubber running slit groove 10 is made a single piece, and an adhesive is applied to a single thread rubber A or the like. Based on the position of the rubber running slit groove 10, the positional relationship P11 and P12 with the base material (the band-shaped diaper main body 22) is regulated, and the rubber running slit groove 10 functions as a guide.

 Fig. 4 shows the outline of the device B for applying adhesive to thread rubber and the like, 1 is an application head, 2 is a valve mechanism, and 3 is a hot melt supply source. A rubber running slit groove 10 is formed at the lower end of the coating head 1 in a vertical direction, and a member to be bonded such as thread rubber is passed through the rubber running slit groove 10 in a horizontal direction, and passes through the rubber running slit groove 10. The adhesive is applied to the thread rubber etc. The rubber running slit groove 10 is open at the front, the rear, and the bottom.

 Referring to FIGS. 4 to 6, coating head 1 includes head body 1A, distribution plate 1B, and plate holder 1C.

 Referring to FIG. 4, the head main body 1A has an adhesive supply hole 11 formed at an upper portion thereof communicating with an adhesive hole 20 of the valve mechanism 2, and a first distribution having an adhesive lateral supply passage 13 at an intermediate portion. A mechanism 12 is formed, and a plurality of rubber running slit grooves 10 are formed in a lower end portion in a vertical direction.

 In the embodiment, referring to FIG. 7, the first distributing mechanism 12 communicates the upper adhesive lateral supply path 15 with the adhesive lateral supply path 13 in addition to the adhesive lateral supply path 13. Two (preferably, plural) adhesive vertical supply paths 14 are added to form a loop, and the adhesive is supplied from both ends (both ends and an intermediate position) of the adhesive horizontal supply path 13. Alternatively, the upper adhesive horizontal supply path 15 may be omitted, and the adhesive vertical supply path 14 may be made a single unit, so that the adhesive supply hole 11 and the center of the adhesive horizontal supply path 13 may be communicated.

The distributing plate 1B is, as shown in FIG. 8 to FIG. A plurality of vertical dividing passages 17 facing the adhesive horizontal supply passage 13 of the first distribution mechanism 12 of 1A, and a rubber running slit groove 10 of the coating head body 1A which is continuous with the lower end of the vertical dividing passage 17 A second distribution mechanism 16 including an opposing distribution reservoir 18 is formed.

 In applying the adhesive to the thread rubber or the like by the method of applying an adhesive to the thread rubber or the like of the present invention, referring to FIG. 11, the adhesive is supplied from the hot melt supply source 3 via the valve mechanism 2 to the adhesive. Through the holes 11, the first distributing mechanism 12, and the second distributing mechanism 16, the hot melt is applied to the rubber running slit grooves 10 with the front, rear, and bottom open by the intermittent operation of the valve mechanism 2. Supplied.

 Depending on the operation type of the valve mechanism, intermittent application is possible by shutting off by the reaction shown in FIG. 15 and shutting off by the suction action shown in FIG.

 The flow of the hot melt in the adhesive supply hole 11, the first distribution mechanism 12, and the second distribution mechanism 16 in the coating head 1 is as shown in FIG.

 The hot melt is supplied from at least one side of the rubber running slit groove in addition to the supply from the upper surface of the rubber running slit groove 10, and is supplied with at least two pieces of thread rubber or the like passing through the rubber running slit groove. The adhesive will be applied to the surface. In the embodiment, in addition to the supply from the upper surface of the rubber running slit groove 10 and the supply from both side surfaces of the rubber running slit groove Π), the thread rubber and the like A passing through the rubber running slit groove 10 are supplied. Adhesive will be applied to 3) ①②③. Fig. 13 shows the case of flat rubber A1, and Fig. 1 and 4 shows the case of thread rubber A2.

 The first invention of the present application is directed to a coating line including a step of applying an adhesive to running flat rubber and thread rubber,

 The rubber running slit groove has a guide function that regulates the adhesive position of rubber in the cross direction of the base material on the coating line by the position in the cross direction of the coating line, thereby simplifying the guide mechanism for the running of thread rubber etc. In addition, the thread rubber or the like to which the adhesive is intermittently applied can guide the running of the thread rubber or the like without contacting the applied adhesive.

 According to the second and third inventions of the present application, when the adhesive is applied to the running flat rubber and thread rubber, a wide adhesive surface can be obtained with a small amount, and excessive adhesion to a product to which thread rubber or the like is adhered. It has the effect of increasing the commercial value by eliminating residual agents.

 In particular, in the disposable diaper manufactured by applying the present invention, the problem that the adhesive does not exude to the baby's skin at the time of use because the adhesive does not exude is provided, and the effect of providing a product with a soft touch is obtained. is there. Industrial applicability

 As described above, the method of applying an adhesive to thread rubber and the like and the adhesive applying apparatus according to the present invention are applied to an application line including a step of applying an adhesive to flat rubber, thread rubber, and the like (for example, a thread is attached to a diaper body). It is suitable for use as a means for applying adhesive to flat rubber, thread rubber, etc. in disposable diaper production lines that include a process for automatically bonding rubber.

Claims

 Claims In an application line including a step of applying an adhesive to running flat rubber and thread rubber, an adhesive is supplied to a rubber traveling slit groove having a bottom surface, a front surface and a rear surface opened in the application line traveling direction,  A thread rubber or the like is supplied to the rubber running slit groove in a state of penetrating the rubber running slit groove in the horizontal direction and in a tension state,  The rubber running slit groove has a guide function of regulating a bonding position of a rubber material in a transverse direction of a base material on a coating line by a position in a transverse direction of the coating line. An adhesive application method for applying an adhesive. Two  In an application line including a step of applying an adhesive to the running flat rubber and thread rubber, the adhesive is supplied to a plurality of rubber traveling slit grooves having a bottom surface, a front surface and a rear surface opened in the application line traveling direction,  A thread rubber or the like is supplied to the rubber running slit groove in a state of penetrating the rubber running slit groove in the horizontal direction and in a tension state,  The rubber running slit groove is a guide for regulating the mutual position of the rubber or the like in the transverse direction of the base material on the coating line and the mutual position of a plurality of thread rubbers in a tension state by the position in the transverse direction of the coating line. 3. The method for applying an adhesive according to claim 1, wherein the adhesive has a function. Three  In an application line that includes a step of applying an adhesive while running flat rubber, thread rubber, etc.,  Adhesive is supplied to the rubber running slit groove whose front and rear surfaces are open at the bottom and the application line travel direction.  In a state in which the rubber running slit groove is horizontally penetrated, a tensioned thread rubber or the like is supplied to the rubber running slit groove,  In supplying the adhesive to the thread rubber or the like, in addition to the supply from the upper surface of the rubber traveling slit groove, the supply from both sides of the rubber traveling slit groove is applied, and the thread rubber passing through the rubber traveling slit groove is supplied. A method for applying an adhesive to thread rubber or the like, characterized by applying an adhesive to three surfaces, such as: Four  In an application line that includes a step of applying an adhesive while running flat rubber, thread rubber, etc.,  Adhesive is supplied to the rubber running slit groove whose front and rear surfaces are open at the bottom and the application line travel direction. With the rubber running slit groove horizontally penetrated, the thread rubber in a tension state Etc. to the rubber running slit groove, In supplying the adhesive to the thread rubber or the like, in addition to the supply from the upper surface of the rubber running slit groove, the supply from at least one side of the rubber running slit groove is applied, and the yarn passing through the rubber running slit groove characterized that you applying adhesive to at least two surfaces, such as rubber, according claim 3, contact adhesive application method _c to rubber threads or the like Five  An adhesive supply hole is provided at an upper portion thereof, an adhesive lateral supply passage is provided at an intermediate portion thereof, and a first distributing mechanism for supplying an adhesive from the adhesive supply hole is formed. A coating head body having a running slit groove formed in a vertical direction;  A plurality of vertical flow paths facing the adhesive lateral supply path of the first distribution mechanism of the coating head main body, and continuous with the lower end of the vertical flow path facing the rubber running slit groove of the coating head main body; A distribution plate forming a second distribution mechanism having a distribution reservoir;  Providing a coater coating head containing:  An apparatus for applying an adhesive to thread rubber or the like, characterized in that an adhesive is applied to three surfaces of thread rubber or the like passing through the rubber running slit groove. 6  Regarding the first distributing mechanism of the application head body, an upper adhesive lateral supply path and a plurality of adhesive vertical supply paths communicating the upper adhesive lateral supply path and the adhesive lateral supply path are added. The adhesive for thread rubber or the like according to claim 4, characterized in that: