KR100426679B1 - A process of preparing for bonding sheet - Google Patents

Abstract

The present invention relates to a method of manufacturing a bonding sheet, (i) after printing a low-solid adhesive composition with a gravure roller (2) on one surface of the bonding fabric or film (A), and (ii) subsequently hopper ( 4a), after passing into the hot melt supply tank 4 composed of the needle roller 4b and the needle-attached vibrator 4c, the adhesive composition of the low solid content is dispersed on the fabric or film dot printed (Iii) removing a portion of the hot melt adhesive while passing it through the suction bath (5), and (i) pressurizing the bonding fabric or film (A) and another bonding fabric (B) treated as described above. (3b, 3c) and the heating roller (6a) at the same time fed to them and characterized in that (iii) continuously hot air drying, cooling and winding it. The bonding sheet manufactured by the present invention is mainly used for clothing and industrial materials, and has excellent adhesive strength and flexibility.

Description

Manufacturing method of bonding sheet {A process of preparing for bonding sheet}

The present invention relates to a method for producing a bonding sheet.

Currently, a bonding sheet in which two bubbles selected from a woven fabric, a knitted fabric, a film, or a nonwoven fabric is combined with a synthetic resin adhesive is widely used as a material for clothing or litter.

As a conventional technique for manufacturing the bonding sheet using a comma coater (Coma coater) to coat the two-component polyurethane resin adhesive on one piece of fabric or film, and then supplying the remaining one sheet on the pressurized, hot air drying The manufacturing method is used.

The prior art has the advantage that the adhesive is coated on the entire surface on the fabric or film, but the peeling strength of the bonding sheet is excellent, but the flexibility of the bonding sheet is insufficient and the touch is rough.

Meanwhile, Korean Patent Laid-Open Publication No. 1999-41259 discloses a two-component polyurethane resin adhesive on one side of a fabric having a relatively good morphological stability among two fabrics with a metal roll engraved with a net-like engraved pattern. Is partially transferred (dot printing) and then hot-air-dried, (ii) the fabric to which the adhesive is transferred and the remaining fabric to which the adhesive is not transferred are fed to the heating drum and the pressure roll at the same time, and then combined with them. A method of producing a bonding sheet by passing through and then aged is described.

In the prior art, although the adhesive is partially transferred onto the fabric, the bonding sheet has good flexibility and feel, but there is a problem in that the adhesive strength between the fabrics is non-uniform depending on the water repellency of the fabric on which the adhesive composition is printed, thereby lowering the peel strength.

An object of the present invention is to produce a bonding sheet having excellent peel strength and good flexibility and touch to solve the problems of the prior art.

The present invention provides a method for producing a bonding sheet having excellent peel strength and at the same time a soft and soft touch.

1 is a process schematic diagram of the present invention.

※ Explanation of main parts in drawings

A: bonding fabric or film B: bonding fabric

C: Bonded Sheet 1: Guide Roller

2: Gravure Roller 3a, 3b, 3c, 3d, 3e: Pressing Roller (Rubber Roller)

4: hot melt supply tank 4a: hopper 4b: needle roller

4c: Vibrator with needles attached 5: Suction room

6a, 6b: heating roller 7: hot air dryer 8a, 8b: cooling drum

The bonding sheet manufacturing method of this invention for achieving such a subject is (i) dot-printing the adhesive composition of a low solid content with the gravure roller (2) on one side of the bonding fabric or film (A), and (ii) continued Hot melt adhesive on a fabric or film in which a low solids adhesive composition is dot printed while passing it through a hot melt supply tank 4 consisting of a hopper 4a, a needle roller 4b, and a vibrator letter 4c with needles attached thereto. After dispersing, (iii) removing a portion of the hot melt adhesive while passing it through the suction bath 5, and (iii) bonding fabric or film (A) and another bonding fabric (B) treated as above. ) Is fed between the pressure rollers 3b and 3c and the heating rollers 6a at the same time to combine them, and (i) it is then hot air dried, cooled and wound up.

Hereinafter, the present invention will be described in detail.

The present invention improves adhesion between fabrics by simultaneously using a low solid adhesive composition and a hot melt resin instead of a two-component polyurethane resin that has been conventionally used as an adhesive, and at the same time, dots on the fabric or film (A) for bonding the adhesives. Printing improves the flexibility and feel of the bonding sheet.

First, the present invention supplies a bonding fabric or film (A) between the pressure roller (3a) and the gravure roller (2) to dot print the adhesive composition of a low solid content on one surface of the bonding fabric or film (A).

The gravure roller 2 is a metal roller with a engraved net pattern on a part of the roller surface. The gravure roller 2 stores the adhesive composition in the engraved pattern and then transfers it onto the bonding fabric or film A. As a result, the adhesive composition is printed in a dot or mesh shape on the bonding fabric or film (A). At this time, the coating amount of the adhesive composition may be adjusted by adjusting the number of pieces of the intaglio pattern on the gravure roller 2 surface.

The amount of low solid adhesive composition applied on the bonding fabric or film (A) is inversely proportional to the number of engraved patterns per surface unit area of the gravure roller (2). The number of meshes of the gravure roller ² represents the number of engraved reticulated patterns per unit area (inch ² ) of the gravure roller. In the present invention, the number of meshes of the gravure roller 4 is adjusted to 15 to 100 mesh depending on the use of the bonding sheet. The amount of adhesive applied per yard of the bonding fabric or film (A) is preferably 15 g or less.

It is preferable that the adhesive composition of a low solid content contains 10 weight% or less of polyurethane adhesive solids or acrylic adhesive solids. As the bonding fabric or film (A), a fabric such as polyester or nylon, a knitted fabric, a film or a mesh can be used. As the bonding fabric (B), a fabric such as polyester or nylon, a knitted fabric or a mesh is used. The pressure rollers 3a to 3e used in the present invention are rubber rollers.

Subsequently, the hot melt adhesive is dispersed on the surface on which the adhesive composition is dot printed while passing the bonding fabric or film A of which the low solid adhesive composition is dot-printed through the hot melt supply tank 4 as described above.

The hot melt supply tank 4 is a hopper (4a) for supplying a hot melt adhesive, a needle roller (4b) for moving the adhesive from the hopper to the bonding fabric or film (A) and the hot melt adhesive on the needle roller roller prints the adhesive composition It is composed of a vibrator letter (4c) to be dispersed on the bonding fabric or film (A). The vibrator letter 4 is wound around the needle, and the hot melt adhesive is dispersed on the bonding fabric or film (A) while vibrating by magnetic force.

As the hot melt adhesive, a polyamide resin, a polyester resin or a high density ethylene resin may be used, but most preferably, a polyamide resin is used. The hot melt adhesive is in powder or particle form.

Subsequently, the bonding fabric or film A in which the hot melt adhesive is dispersed as described above is supplied to the suction bath 5 to remove some of the hot melt adhesive dispersed in the bonding fabric or film A. At this time, the hot melt adhesive dispersed on the low solid adhesive composition is not removed, but all hot melt adhesives which are dispersed directly on the bonding fabric or film (A) and are not in contact with the low solid adhesive composition are removed.

Next, a low-solid adhesive composition and a bonding fabric or film (A) on which the hot melt adhesive is dot-printed and another bonding fabric (B) to which the adhesive is not attached are pressed rollers (3b, 3c) and a heating roller ( The two fabrics or one fabric and one film are combined with each other by simultaneously feeding, heating and compressing them through 6a). Bonding fabric (B) and bonding when simultaneously supplying a bonding fabric or film (A) and another bonding fabric (B) in which a low solid adhesive is dot-printed between the pressure roller (3b) and the heating roller (6a). The adhesive coatings on the fabric or film (A) are fed in contact with each other.

In other words, the side of the bonding fabric or film (A) where no adhesive layer is formed is in direct contact with the heating roller (6a), and the adhesive layer on the bonding fabric or film (A) is formed of another bonding fabric (B). In contact with one side, the other side of the bonding fabric (B) is in direct contact with the pressure roller (3b).

Subsequently, the composite sheet passed between the pressurizing roller 3c and the heating roller 6a is hot-air dried with a hot air dryer 7, and then passed through the cooling drums 8a and 8b to cool, then wound and bonded to the bonding sheet. (C) is prepared.

In addition, the present invention can be pressurized and bonded by passing the hot-air-dried composite sheet between the press rollers 3d and 3e and the heating roller 6b once again before passing between the cooling drums 8a and 8b.

In the present invention, the adhesive composition (hot peeling strength) between the fabrics is improved and uniformed despite the dot printing (partial transfer) of the adhesive by using a low solid adhesive composition and hot melt resin instead of the conventional two-component polyurethane resin.

In the present invention, it is possible to prevent the touch and flexibility from being lowered by dot printing instead of the entire surface of the adhesive on one fabric or film.

Hereinafter, the present invention will be described in more detail with reference to Examples and Comparative Examples. However, the present invention is not limited only to the following examples.

Example 1

After dyeing with acid dye, ScotchGuard water-repellent nylon fabric (A) with 5% aqueous dispersion was supplied between the press roller (3a) and the gravure roller (2) of 23 mesh to obtain 8% by weight of solids on the fabric (A). After dot-printing the phosphorus-based polyurethane adhesive composition, it is passed through a hot melt supply tank consisting of a hopper 4a, a needle roller 4b, and a vibrator letter 4c, and a polyamide resin on a fabric on which the adhesive composition is dot-printed. The hot melt adhesive is dispersed. Subsequently, some of the hot melt adhesive dispersed as above is removed while passing it into the suction bath 5. Subsequently, the suction-treated nylon fabric (A) and a separate polyester fabric (B) without adhesive are simultaneously supplied between the pressure roller (3b) and the heating roller (6a) at 140 ° C to be heated and compressed. To fabricate the fabrics. Subsequently, hot air is dried while passing the sheet into the hot air dryer 7 at 100 ° C., followed by secondary heating and pressing while passing it between the pressure roller 3d and the heating roller 6 b at 180 ° C. FIG. Subsequently, the heated and compressed sheet is cooled while passing through the cooling drums 8a and 8b, and then wound up to produce a bonding sheet C. Table 1 shows the results of evaluating the peel strength, flexibility, and touch of the manufactured bonding sheet.

Example 2

After dyeing with a disperse dye, the polyester fabric (A) water-treated with ScotchGuard 3% aqueous dispersion was supplied between the pressure roller (3a) and the gravure roller (2) of 23 mesh to obtain 8 weights of solids on the fabric (A). After printing the polyurethane-based adhesive composition at%, the polyamide on the fabric in which the adhesive composition was dot-printed while passing it into a hot melt supply tank consisting of a hopper 4a, a needle roller 4b and a vibrator letter 4c. The hot melt adhesive of the resin is dispersed. Subsequently, some of the hot melt adhesive dispersed as above is removed while passing it into the suction bath 5. Subsequently, the suction-treated polyester fabric (A) and the separate polyester fabric (B) without adhesives are simultaneously supplied between the pressure roller (3b) and the heating roller (6a) at 140 ° C, and heated. Compress the fabrics together. Subsequently, hot air is dried while passing the sheet into the hot air dryer 7 at 100 ° C., followed by secondary heating and pressing while passing it between the pressure roller 3d and the heating roller 6 b at 180 ° C. FIG. Subsequently, the heated and compressed sheet is cooled while passing through the cooling drums 8a and 8b, and then wound up to produce a bonding sheet C. Table 1 shows the results of evaluating the peel strength, flexibility, and touch of the manufactured bonding sheet.

Example 3

After dyeing with acid dyes, the cotton fabric (A) treated with ScotchGuard 5% water dispersion was supplied between the pressure roller (3a) and the gravure roller (2) of 23 mesh to obtain 8% by weight of solids on the fabric (A). After dot-printing the phosphorus-based polyurethane adhesive composition, it is passed through a hot melt supply tank consisting of a hopper 4a, a needle roller 4b, and a vibrator letter 4c, and a polyamide resin on a fabric on which the adhesive composition is dot-printed. The hot melt adhesive is dispersed. Subsequently, some of the hot melt adhesive dispersed as above is removed while passing it into the suction bath 5. Subsequently, the suction-treated cotton fabric (A) and the separate polyester fabric (B) without adhesive are simultaneously supplied between the pressure roller (3b) and the heating roller (6a) at 140 ° C to be heated and compressed. To fabricate the fabrics. Subsequently, hot air is dried while passing the sheet into the hot air dryer 7 at 100 ° C., followed by secondary heating and pressing while passing it between the pressure roller 3d and the heating roller 6 b at 180 ° C. FIG. Subsequently, the heated and compressed sheet is cooled while passing through the cooling drums 8a and 8b, and then wound up to produce a bonding sheet C. Table 1 shows the results of evaluating the peel strength, flexibility, and touch of the manufactured bonding sheet.

Comparative Example 1

After dyeing with acid dye, dot-print polyamide hot melt adhesive using 50 mesh gravure roller on water repellent treated nylon fabric (A) with ScotchGuard 5% aqueous dispersion. Cool by passing through. Subsequently, a nylon fabric (A) coated with a hot melt adhesive and a polyester fabric (B) not coated with an adhesive are fed between a pressurized rubber roller and a heating roller at 140 ° C. to heat and press to fabricate these fabrics. Subsequently, hot air is dried while passing the sheet into the hot air dryer at 100 ° C., and it is then passed through a pressurized roller and a heating roller at 180 ° C. to be heated and compressed secondly. Subsequently, the heated and compressed sheet is cooled while passing through a cooling drum, and then wound up to prepare a bonding sheet (C). Table 1 shows the results of evaluating the peel strength, flexibility, and touch of the manufactured bonding sheet.

Comparative Example 2

After dyeing with acid dyes, ScotchGuard 5% water-dispersed water-repellent nylon fabric (A) was coated with a two-component polyurethane adhesive using a comb coater. After passing through the heating roller of ℃ ℃ hot air drying in a 170 ℃ hot air dryer to produce a bonding sheet. Table 1 shows the results of evaluating the peel strength, flexibility, and touch of the manufactured bonding sheet.

Property evaluation result division Peel strength flexibility touch Example 1 Great Great soft Example 2 Great Great soft Example 3 Great Great soft Comparative Example 1 Great Great soft Comparative Example 2 Good Bad tough

＊ Flexibility and touch were evaluated by the sensory test of experts, and peel strength was relatively evaluated by comparing each example and the comparative example.

* Comparative Example 1 is excellent in peel strength, flexibility and feel, but there is a problem that the manufacturing cost increases compared to Examples 1 to 3 because the work process is not a batch process.

The bonding sheet produced by the present invention is excellent in peel strength between fabrics, soft and soft to the touch, and is very useful as a living material or clothing material.

Claims (6)

(Iii) Dot-printing a low-solid adhesive composition with a gravure roller (2) on one side of the bonding fabric or film (A), and then (ii) subsequently attaching the hopper (4a), the needle roller (4b) and the needle cloth After passing through the hot melt supply tank 4 composed of the vibrator letter 4c, the low melt adhesive composition is dispersed on the fabric or film with dot printing, and (i) it is passed through the suction tank 5. While removing a portion of the hot melt adhesive, and (i) the bonding fabric or film (A) and another bonding fabric (B) treated as described above between the pressure roller (3b, 3c) and the heating roller (6a) A method of manufacturing a bonding sheet, wherein the sheet is fed at the same time to be combined with each other, and then (iii) the result is hot air drying, cooling, and winding. The method according to claim 1, wherein when the bonding fabric or film (A) and the bonding fabric (B) are simultaneously supplied between the pressure roller (3b) and the heating roller (6a), bonding with the adhesive layer of the bonding fabric or film (A) A method of manufacturing a bonding sheet, characterized in that the one surface of the fabric (B) is supplied so as to contact each other. The method for producing a bonding sheet according to claim 1, wherein up to 10% by weight of a polyurethane-based adhesive solid or an acrylic-based adhesive solid is contained in the low-solid adhesive composition. The method for producing a bonding sheet according to claim 1, wherein the hot melt adhesive is polyamide, polyester or high density polyethylene. 2. A method according to claim 1, characterized in that it passes once again between the press rollers (3d, 3e) and the heating rollers (6b) before cooling the fabric and hot air dried fabric. 2. A method of making a bonding sheet according to claim 1, wherein the fabric and hot air dried fabric are passed between cooling drums (8a, 8b) to cool.