JPS5869049A - Lining treatment method - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to the treatment of polymeric waterproof linings on substrates such as fabrics and nonwovens. Conventionally, for these base materials,
Resin lining treatment for the purpose of imparting waterproofness and improving surface properties is carried out by coating or impregnating with a polymer solution and laminating the base material, such as a polymer film, with an adhesive or hot press. However, when coating porous substrates such as cloth and non-woven fabrics using these methods, the penetration of the solution into the substrate is large (in order to obtain a uniform lining film, an excessive amount of coating must be applied). This not only significantly impairs the texture and air permeability of the base material, but also requires drying equipment and solvent recovery equipment to dry unnecessary solvents, resulting in high production costs.In addition, there are safety issues such as fire prevention, and product quality. There were problems such as the solvent easily remaining.Also, a method has been proposed in which a thermoplastic elastomer is coated on a silicone release paper, dried, formed into a film, and then laminated to the base material, but this method still avoids the problems described above. Moreover, since the release paper is expensive, the cost is high.Furthermore, a method of melt-extrusion coating the base material with a thermoplastic elastomer is also considered, but when extrusion coating is performed with a single layer of elastomer, Because it is difficult to make a thin layer, there are problems with surface properties such as deterioration of the texture and breathability of the base material, and manufacturing costs are high because the resin basis weight (coating amount per unit fabric) is large. Become.

Furthermore, in the single layer extrusion coating method, it is difficult to achieve a thickness of 20 μm or less.

The elastomer τ used for lining the base material is susceptible to cooling of the metal and blocking on rolls, and has large neck-in and drawdown problems, resulting in poor workability.

Moreover, thin elastomer films have many problems when stored in the film state due to problems such as blocking, wrinkles, and strength.

The inventors of the present invention have solved the above-mentioned drawbacks and have developed 20
Patent application No. 56-994 for a method of laminating and lining a thermoplastic elastomer film of less than μ on a base material.
No. 18, a laminate consisting of one layer of thermoplastic elastomer produced by coextrusion method and a release layer of non-polar polyolefin with low surface energy on a base material such as cloth or nonwoven fabric, with one layer of thermoplastic/elastomer on the base material side. The application has been filed for a lining treatment method in which only the release layer is peeled off after heat treatment.

Although the intended purpose was achieved, the adhesive strength to the base material was insufficient, and the desired effect could not be obtained in some cases.

The present invention improves this point.

In the present invention, a laminate in which an adhesive layer, a single layer of thermoplastic resin, and a release layer of a non-polar resin with low surface energy are formed on a base material by coextrusion method is stacked so that the adhesive layer is on the base material side, and then bonded. This is a lining treatment method in which only the release layer is removed.

Here, the laminate obtained by the coextrusion method is laminated to a base material in the coextruded state, or a -supported laminated film is produced, and this film is stacked on the base material and laminated by heating and pressing.

The adhesive layer used in the present invention is selected from copolyesters, copolyamides, and polyolefins containing comonomers selected from unsaturated carboxylic acids or derivatives thereof, which have excellent adhesion to the substrate and thermoplastic elastomer. Consists of one species.

Copolymerized polyesters include, for example, copolyesters obtained by condensing terephthalic acid, isophthalic acid, adipic acid as an acid component, ethylene glycol, propylene glycol, etc. with an alcohol component, and polyesters into which long-chain soft segments made of alkylene ether are introduced. /Polyether block copolymer.

Copolymerized polyamides include caprolactam/laurin lactam copolymer, laurin lactam/hexamethylene diammonium adipate copolymer, and caprolactam/laurin lactam copolymer.
hexamethylene diammonium adipate copolymer,
Hexamethylene diammonium adipate/hexamethylene diammonium separate copolymer, ethylene di7
y -E: -1-ram adipate/hexamethylene diammonium adipate copolymer, caprolactam/
Examples include hexamethylene diammonium adipate/hexamethylene diammonium separate copolymer, polymethaxylylene/paraxylylene adiperamide copolymer, and the like.

Comonomer components contained in polyolefins include unsaturated carboxylic acids such as acrylic acid, methacrylic acid, d-ethyl acrylic acid, maleic acid, fumaric acid, and itaconic acid, and their esters, ethers, anhydrides, metal salts, glycidyl esters, and amides. There are derivatives such as Polyolefins containing vinyl esters such as vinyl acetate in addition to the above comonomers may also be used.

The single layer of elastomer to be laminated has an appropriate thickness of 1 to 20 μm, and is composed of bifunctional polyol, glycol, and diisocyanate, thermoplastic polyurethane with an NC010H ratio of 0.95 to 11, polyester of crystalline node segment, and non-containing polyester. Polyester elastomers consisting of block copolymers with polyethers of high quality, polyvinyl chloride modified by copolymerization with plasticizers or comonomers, 1-2 polybutadiene, styrene/isoprene block copolymers, styrene/butadiene block copolymers Polymer, styrene/a-olefin block copolymer, or polyisobutylene, the strength of the thinned resin film, the peelability from the release layer, thermoplastic polyurethane, polyester elastomer, modified polychloride. Vinyl is suitable.

It also includes blends of other ballast resins, additives, coloring agents, and foaming agents added to the extent that the basic properties of the resin are not impaired.

Furthermore, the release layer is made of a non-polar resin with low surface energy.
For example, it is made of low-density polyethylene, medium-density polyethylene, high-density polyethylene, polypropylene, polymethylpentene, polybutene, and polyolefins that are copolymer resins thereof.

The glabella adhesive strength between this thermoplastic elastomer layer and the release layer is 10 o, 9/15 ml+ or less.

The interlayer adhesive strength between one layer of thermoplastic elastomer and the adhesive layer was 200. p/15mm or more, preferably 400
g71511111 or higher is required.

This peel test was performed using T-peel at a tensile speed of 300m5+/
It was done at min.

A single layer of thermoplastic elastomer for lining treatment as described above uses a coextrusion method to maintain a molten film,
The drawability is improved, a thin film of 20μ or less can be obtained, which is impossible with the single layer method, a film with a uniform thickness of 1 to 20μ can be obtained, and a uniform lining treatment can be performed on the entire substrate. be able to.

Furthermore, since the lining treatment is performed via an adhesive layer between the base material and one layer of thermoplastic elastomer, a lining film with sufficient adhesive strength to the base material, no risk of peeling, and excellent texture can be obtained.

As described above, the present invention uses a coextrusion method, unlike the lining method known to those skilled in the art, which makes it easy to apply a thin layer of coating, and the physical properties such as breathability and texture are improved. Since it is basically a solvent-free process, there is no concern about residual solvent in the product, and it is possible to reduce drying equipment and solvent costs.

In addition, it does not use expensive release paper such as silicone release paper, but instead uses inexpensive resin such as polyolefin, and the resin after release can be recycled and reused, resulting in low manufacturing and material costs. becomes.

Examples of the present invention will be described below.

<Example 1> Polypropyref (FL
25 produced by Mitsubishi Yuka), polyurethane elastomer (Elastlan E385 produced by Nippon Elastran), and polyester resin (produced by Stafix Fuji Photo Film) at a resin temperature of 200°C.
μ)/polyurethane elastomer (15μ)/polyester resin (3μ) on a cooling roll to obtain a three-layer film. The resulting three-layer film was layered with the polyester resin side facing the cotton cloth side and laminated by passing between rolls heated to 150°C.Then, the polypropylene layer was peeled off and a lining film of polyurethane elastomer was applied. did.

The obtained lining cotton fabric had good adhesive properties, and no change was observed even after being subjected to treatments such as kneading, washing, and dry cleaning.

<Example 2> Using the coextrusion apparatus shown in Fig. 2, polyethylene (Miralan 14, manufactured by Mitsui Polychemicals), polyurethane elastomer (Hara 7" Run 22.8, manufactured by Nippon Polyurethane), and polyamide resin (Diamide, manufactured by Daicel) ) was extrusion coated onto a nylon cloth at a resin temperature of 190° C. so that the polyamide resin overlapped with the polyamide resin, and then the polyethylene layer was peeled off to obtain a polyurethane elastomer lining film.

The thickness of each extruded laminate on nylon cloth was polyethylene (40 μ)/polyurethane elastomer (2
0μ)/polyamide resin (6μ).

<Example 3> Polypropylene (FL
25F manufactured by Mitsubishi Yuka), polyurethane with 5 parts by weight of polyester short fibers added (Elastlan E685 manufactured by Nippon Elastran), polyurethane with 1 part by weight of a blowing agent (Uniform AZ manufactured by Otsuka Chemical) (same as above), and polyester-based Polypropylene (60μ)/fiber-added polyurethane elastomer (10μ), foaming agent-added polyurethane elastomer (7) were mixed with resin (manufactured by Stafix Fuji Photo Film) at a resin temperature of 180°C.
20μ)/polyester resin (4μ) was extruded onto a cooling roll to obtain a four-layer film.

The obtained film was placed in a laminate sifter with cotton cloth in the same manner as in Example 1, and was then placed in an open oven at 220° C. for 2 minutes to undergo foaming treatment to obtain a porous polyurethane lining film.

<Example 4> Using the coextrusion apparatus shown in Fig. 1, polypropylene (FL
25 Mitsubishi Yuka (Tan)), polyurethane distomer (Elastlan E385 manufactured by Nippon Elastran), and ethylene methacrylic acid copolymer resin (Sir IJ, manufactured by DuPont) were mixed at a resin temperature of 200°C, respectively, and polypropylene (6
A three-layer film was obtained by extrusion on a cooling roll using a mixture of 0μ)/polyurethane distomer (30μ)/ethylene methacrylic acid copolymer resin (10μ). The obtained three-layer film was laminated onto a cotton cloth and subjected to lining treatment in the same manner as in Example 1.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of a coextrusion device used in an example of the present invention, Fig. 2 is an explanatory diagram of a coextrusion lamination device used in an example of the present invention, and Fig. 6 is an explanatory diagram of a coextrusion device used in an example of the present invention. FIG. 2 is an explanatory diagram of a coextrusion device. Patent applicant Toppan Printing Co., Ltd. Representative Kazuo Suzuki Figure 1 Figure 2

Claims (6)

[Claims] (1) A laminate in which an adhesive layer, a single layer of thermoplastic resin, and a release layer of a non-polar resin with low surface energy are formed on a base material by coextrusion method is stacked and bonded so that the adhesive layer is on the base material side. , a lining treatment method in which only the release layer is removed. (2) The peel strength of the laminate between the adhesive layer and the thermoplastic elastomer layer is 200. ! i+/15m or more and the peel strength between one layer of thermoplastic elastomer and the release layer is 100g/15W
The lining treatment method according to claim 1, which has an IA or less. (3) The lining treatment method according to claim 1 or 2, wherein the release layer of the laminate is made of polyolefin. (4) The thermoplastic elastomer layer of the laminate is a thermoplastic polyurethane in which the NC010H of incyanate groups (NGO) and hydroxyl groups (OH) is 095 to 11. Lining treatment method. (5) One layer of thermoplastic elastomer in the laminate has crystallinity...
4. The lining treatment method according to claim 1, wherein the polyester elastomer is a block copolymer of a soft segment polyester and a non-quality soft segment polyether. (6) The lining treatment method according to any one of claims 1 to 3, wherein the thermoplastic elastomer layer of the laminate is polyvinyl chloride modified by plasticity or copolymerization with a comonomer. (The lining according to claims 1 to 6, wherein the sword adhesive layer is made of one type selected from copolyester, copolyamide, and polyolefin containing a comonomer selected from unsaturated carboxylic acids or derivatives thereof. Processing method.