JP2003019005A - Hook-and-loop fastener for fusion - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a hook-and-loop fastener which has good adhesiveness to an adherend consisting of a polyolefinic resin. SOLUTION: The hook-and-loop fastener for fusion which is formed by successively laminating a resin layer (B) and a resin layer (C) to the rear surface of the hook-and-loop fastener formed from synthetic fibers and satisfies the following requirements (1) to (4) or the hook-and-loop fastener for fusion which is formed by laminating a resin layer (D) to the rear surface of the hook-and- loop fastener (A) and satisfies the following requirements (5) to (6): The hook- and-loop fastener for fusion satisfying the requirements that (a) the resin layer (B) to be formed by applying a resin liquid to the rear surface of the hook-and- loop fastener; (2) the resin layer (B) to be formed by applying the resin liquid onto the resin layer (B); (3) the resin layer (B) to include a crosslinked polar resin of a non-olefinic system; (4) the resin layer (C) to include a polyolefinic resin; (5) the resin layer (D) to be formed by applying the resin liquid to the rear surface of the hook-and-loop fastener and (6) the resin layer (D) to include the crosslinked polar resin of the non-olefinic system and the polyolefinic resin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a surface fastener which can be heat-sealed (hereinafter referred to as "fusion") to an adherend, and more specifically to a surface fastener made of a polyolefin resin. Regarding hook-and-loop fasteners.

[0002]

2. Description of the Related Art A synthetic fiber hook-and-loop fastener includes a hook-shaped engaging element or a mushroom-shaped engaging element and / or a large number of loop-shaped engaging elements that engage with these engaging elements on a woven base fabric. A hook-and-loop fastener made of a woven fabric attached thereto, which is widely used for various purposes due to its engaging performance and flexibility due to the weaving structure. Further, in the knitted and woven surface fastener, it is necessary to fix the fibers of the base cloth and the fibers of the engagement element so that the engagement element does not come off from the base cloth. For this purpose, conventionally, a method of coating a fixing resin on the back surface of the base fabric has been used.

The present invention relates to a technique for joining the back side of a knitted and woven surface fastener to an adherend. When a textile weave fastener is attached to a cloth, it is usually sewn with a thread or joined with various adhesives. On the other hand, a woven surface fastener joined to a resin film or sheet is also used, but in this case, if the adhesiveness between the woven surface fastener and the resin film is unsuitable, the adhesive strength is poor and it is practically used. Will not stand. Conventionally, as a resin film or sheet, a polyvinyl chloride resin having excellent adhesiveness with a surface fastener has been frequently used, but the polyvinyl chloride resin generates a chlorine-containing gas when incinerated, and in recent years, is a cause of dioxin generation. It is also said. Therefore, it is proposed to use a film or sheet made of a polyolefin resin that does not generate a toxic gas, instead of the polyvinyl chloride resin, and to bond a weaving surface fastener (hereinafter sometimes simply referred to as a surface fastener) to the film or sheet. However, since the polyolefin resin has poor affinity and adhesiveness with other resins, it is difficult to strongly bond it to the surface fastener.

Various adhesives and bonding methods have been proposed in order to solve the above problems, but none is satisfactory in terms of adhesive strength and manufacturing process. Instead of this method,
A fusion-bonding surface fastener in which a two-layer film of a thermoplastic resin film of the same quality as that of the surface fastener and a polyolefin film having a lower melting point than the thermoplastic resin film is fused to the surface fastener as a heat-bonding film is disclosed in Japanese Utility Model Publication No. 3-42802. It is proposed in Japanese Patent Laid-Open No. 11-253210. The technique of this publication discloses a method of directly fusing the two-layer film to the back surface of the surface fastener.

However, the above method requires that a two-layer film be prepared in advance, that this two-layer film be slit to the same width as the surface fastener, and that the two kinds of films have different hygroscopic properties. The layer film may curl, it is necessary to install a fusing device, and the heating conditions and the thickness of the two-layer film may be controlled so that the surface fastener and the two-layer film are well fused. Since it is necessary, the production process is complicated and the cost is high, and there are many practical problems. Further, even if the two-layer film is directly fused to the surface fastener, the adhesion is not sufficient, and it is easily peeled from the adhesive interface, which is not a practical technique.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to solve the above problems and provide a fusion-bonding surface fastener having excellent performance by a coating technique which is easy to manufacture.

[0007]

That is, according to the present invention, a resin layer (B) and a resin layer (C) are sequentially laminated on the back surface of a surface fastener (A) formed of a synthetic fiber under the following conditions: The resin layer (B) is formed by applying a resin liquid on the back surface of the surface fastener, and the resin layer (C) is formed by applying a resin liquid on the resin layer (B). A fusion-bonding surface fastener characterized in that the layer (B) contains a non-polyolefin-based crosslinked polar resin and the resin layer (C) contains a polyolefin-based resin.

Further, according to the present invention, the resin layer (D) is laminated on the back surface of the surface fastener (A) formed of synthetic fiber, and the following conditions and the resin layer (D) apply the resin liquid to the back surface of the surface fastener. The fusion-bonding surface fastener is characterized by satisfying that the resin layer (D) contains a non-polyolefin-based crosslinked polar resin and a polyolefin-based resin.

Preferably, the resin layer (B), the resin layer (C) and the resin layer (D) are both formed from an aqueous resin solution, and the crosslinked polar resin is used. Is a cross-linked polyurethane resin, and the polyolefin resin is α-
Olefin monomer 30-95% by weight, (meth) acrylic acid derivative 5-60% by weight, other monomers 0-30
This is the case when the resin is synthesized from wt%, and α-
This is the case when the olefin monomer is ethylene and / or propylene. And more preferably, the polyurethane-based resin is a polyurethane obtained by using a high molecular weight polyol having a molecular weight of 500 to 3000, an organic diisocyanate, a chain extender and 2,2-dimethylolalkanoic acid as main raw materials.

Further, the present invention is a polyolefin resin molded article with a surface fastener, in which the resin layer (C) of the above-mentioned surface fastener for fusion bonding is integrated with the surface of a molded article made of a polyolefin resin by heat fusion. A polyolefin resin molded product with a surface fastener, wherein the resin layer (D) of the surface fastener for fusion bonding is integrated with the surface of a molded product made of a polyolefin resin by heat fusion.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION In the present invention, it is necessary to apply a crosslinked and cured resin coat layer to the back surface of the base fabric of the surface fastener, that is, the surface having no engaging element. The crosslinked and cured resin coat layer firmly adheres and fixes the fibers of the base cloth and the fibers of the hook-shaped or loop-shaped engaging element. By sufficiently fixing the fibers of the base cloth and the fibers of the engaging element, the durability of the surface fastener becomes practically sufficient. The coat layer and the surface fastener do not need to have a clear boundary, and the crosslinked and hardened resin coat layer is present inside the base fabric of the surface fastener, preferably from the viewpoint of durability to the root of the engaging element. preferable. In the present invention, this resin coat layer corresponds to the resin layer (B).

Further, since the surface fastener of the present invention has a fusion property to an adherend such as a film or sheet made of a polyolefin resin and a fiber molding, the resin on the outermost surface of the back surface contains the polyolefin resin. is necessary. From the above point, when the resin layer (B) and the resin layer (C) are sequentially laminated on the back surface of the surface fastener, the resin layer (B) contains a non-polyolefin-based crosslinked polar resin, and It is necessary that the resin layer (C) contains a polyolefin resin. On the other hand, when the resin layer on the back surface of the surface fastener is substantially only the resin layer (D), it is necessary that the resin layer (D) contains a non-polyolefin-based crosslinked polar resin and a polyolefin-based resin. .

As the resin liquid used in forming the resin layer (B), the resin layer (C) and the resin layer (D), a liquid composition containing water or an organic solvent as a solvent is used. It is particularly preferable to use an aqueous dispersion type or aqueous solution type resin liquid because it can be produced without using an organic solvent that is harmful to the environment and the human body.

As the polar resin, for example, a polyurethane resin, an acrylic resin, a polyamide resin, a polyester resin or the like can be used. Among them, the polyurethane resin is used to form a surface fastener. It is preferable because the adhesiveness to the fibers is even better. As the polyurethane resin, a known polyurethane resin can be used, but in particular, a high molecular weight polyol having a molecular weight of 500 to 3000, an organic polyisocyanate, a chain extender and 2,2-dimethylolalkanoic acid are used as main raw materials. The polyurethane resin thus obtained is preferred. As the above-mentioned polymer polyol, organic polyisocyanate and chain extender, known compounds which have been conventionally used for producing polyurethane resins can be used.

In the present invention, as the non-polyolefin cross-linked polar resin, the unit derived from the α-olefin monomer does not exist at all in the polar resin, or if it exists, it is 10% by weight or less. A certain polar resin is preferable, and when it is a resin present in an amount exceeding 10% by weight, the adhesive fixing force of the base fabric constituent fibers and the loop / hook forming fibers is lowered.

The polyolefin resin contained in the resin layer on the back surface of the surface fastener of the present invention is a polymer of an ethylenically unsaturated monomer containing an α-olefin monomer such as ethylene or propylene as an essential component. In particular, when the total amount of monomers is 100% by weight, 30 to 95
A fiber constituting the hook-and-loop fastener, the polar resin, wherein the weight% is an α-olefin monomer, 5 to 60% by weight is a (meth) acrylic acid derivative, and 0 to 30% by weight is another copolymer. And the adherend made of a polyolefin resin are more excellent in adhesiveness, which is preferable. The structure of the polymer may be a block copolymer or a random copolymer.

Examples of the α-olefin monomer used in the present invention include ethylene, propylene, 1-butene,
1-octene and the like can be mentioned, and one or more of these can be used. Among these, it is preferable to use ethylene and / or propylene because the adhesiveness to an adherend made of a polyolefin resin is further excellent. From the viewpoint of affinity, it is more preferable to use a polyethylene resin as the polyolefin resin in the case of the adherend made of a polyethylene resin, and to use a polypropylene resin in the case of the adherend made of a polypropylene resin.

The (meth) acrylic acid derivative used in the present invention is, for example, methyl (meth) acrylate,
Ethyl (meth) acrylate, butyl (meth) acrylate, 2-ethylhexyl (meth) acrylate, (meth)
Lauryl acrylate, stearyl (meth) acrylate,
Cyclohexyl (meth), isobornyl (meth) acrylate, benzyl (meth) acrylate, methacrylic acid, glycidyl (meth) acrylate, dimethylaminoethyl (meth) acrylate, diethylaminoethyl (meth) acrylate , 2-hydroxyethyl (meth) acrylate, 2-hydroxypropyl (meth) acrylate, and the like, and one or more of these can be used.

Further, as other monomers, for example, aromatic vinyl compounds such as styrene, α-methylstyrene and p-methylstyrene; amides of unsaturated carboxylic acids such as (meth) acrylamide and diacetone acrylamide; (Anhydrous) maleic acid, fumaric acid, (anhydrous) itaconic acid or derivatives thereof; heterocyclic vinyl compounds such as vinylpyrrolidone; vinyl compounds such as vinyl chloride, acrylonitrile, vinyl ether, vinyl ketone, vinylamide, and the like. Of these, one kind or two or more kinds can be used. When 1 to 20% by weight of all monomers are carboxyl group-containing monomers such as (meth) acrylic acid, (anhydrous) maleic acid, fumaric acid, (anhydrous) itaconic acid, fibers and resin layers constituting the surface fastener This is preferable because the adhesion of the polyolefin resin to the polar resin therein is further excellent.

In the present invention, when a resin layer (C) containing a polyolefin resin is further present on the resin layer (B) on the back surface of the surface fastener, the resin component constituting the resin layer (B) is a polar resin. It is preferable that the resin layer (B) is composed of 60 to 100% by weight and the polyolefin resin is 0 to 40% by weight because both the fibers constituting the surface fastener and the resin layer (C) exhibit good adhesiveness.
At this time, the resin layer (C) is a polyolefin resin 30-
100% by weight and 0 to 70% by weight of the polar resin are preferable because both the resin layer (B) and the adherend made of the polyolefin resin show good adhesiveness. Further, the resin layer (B) and the resin layer (C) may be blended with other resins within a range that does not significantly impair the performance of the resin layer (B) and the resin layer (C), but preferably the resin In this case, 25% by weight or more of the resin forming the layer (B) is the polar resin, and 25% by weight or more of the resin forming the resin layer (C) is the polyolefin resin.

In the present invention, when one layer of the resin layer (D) functions as both the resin layer (B) and the resin layer (C), the resin constituting the resin layer (D) The component contains polar resin and polyolefin resin, and the weight ratio is 3
The range of 0:70 to 70:30 is preferable because the resin layer (D) exhibits good adhesiveness to both the fiber constituting the surface fastener and the adherend made of a polyolefin resin. The resin layer (D) may contain a resin other than the polar resin and the polyolefin-based resin within a range that does not impair the performance of the resin layer (D). It is preferably less than 50% by weight of the resin constituting the. The resin layer (D) may be divided into a plurality of layers having different blending amounts of the polar resin and the polyolefin-based resin. In that case, the resin layer (B) and the resin layer (C) are referred to as above. Is appropriate.

In the present invention, the polar resins in the resin layer (B) and the resin layer (D) need to be crosslinked. Crosslinking of the polar resin is easily achieved by adding a curing agent to the resin liquid for forming the resin layer (B) and the resin layer (D), and performing heat treatment after forming the resin layer. On the other hand, the olefin resin in the resin layer (B) or the resin layer (D) and the resin constituting the resin layer (C) do not need to be crosslinked, but a curing agent is added to crosslink and cure the resin. There is no problem.

The curing agent that can be used in the present invention is not particularly limited, and examples thereof include compounds having two or more reactive functional groups such as epoxy group, carbodiimide group and oxazoline group in one molecule. For example, CR-5L (manufactured by Dainippon Ink and Chemicals, Inc.),
Polyfunctional epoxy compounds such as Denacol EX-321 (manufactured by Nagase Chemical Industry Co., Ltd.), Denacol EX-611 (manufactured by Nagase Chemical Industry Co., Ltd.) and Denacol EX-614B (manufactured by Nagase Chemical Industry Co., Ltd.); Carbodilite E-01 ( Made by Nisshinbo Industries, Inc., Carbodilite V
Polyfunctional carbodiimide compounds such as -02 (manufactured by Nisshinbo Co., Ltd.); and polyfunctional oxazoline compounds such as Epocros WS-500 (manufactured by Nippon Shokubai Co., Ltd.) and Epocros K-2010E (manufactured by Nippon Shokubai Co., Ltd.). Among these, it is preferable to use a polyfunctional epoxy compound such as CR-5L, Denacol EX-321, Denacol EX-611, and Denacol EX-614B, because the cost is low and the performance of the obtained surface fastener is particularly excellent.

Each of the above resin components is added to an organic solvent or water to prepare a dispersion type or solution type resin liquid by a conventional method. As the organic solvent, for example, toluene, ethyl acetate, butyl acetate, dimethylformamide, dimethylacetamide, methyl ethyl ketone, methyl butyl ketone, tetrahydrofuran or the like can be used. The resin liquid of the present invention preferably contains a resin solid content of 5 to 60% by weight. Satisfactory adhesive strength can be obtained by using a resin liquid.

In the present invention, the method of back coating the resin composition on the back surface of the surface fastener is as follows:
The method is not particularly limited, and examples thereof include a method in which a roll coater or the like is applied from the back surface of the surface fastener to allow it to penetrate into the surface fastener, followed by drying and heat treatment.

When both the resin layer (B) and the resin layer (C) are present, the coating amount of the above resin composition is 20 to 100 g / m ² in terms of resin solid content as the resin layer (B). ,
The resin solid content of the resin layer (C) is 10 to 100 g / m ^2.
In the case where one layer of the resin layer (D) serves as both the resin layer (B) and the resin layer (C), the coating amount of the resin layer (D) is 20 to 100 g in terms of resin solid content.
/ M ² is preferable.

In the present invention, the resin layer (B), the resin layer (C) and the resin layer (D) may contain various stabilizers, extenders, colorants, and various stabilizers within a range that does not significantly impair the performance, if necessary.
Other resins, inorganic substances, etc. may be added. Furthermore, in the present invention, the adhesiveness between the resin layer (B) and the resin layer (C) is not impaired between the resin layer (B) and the resin layer (C), and the flexibility of the surface fastener is not significantly impaired. Layer, for example, a layer containing both the resin forming the resin layer (B) and the resin forming the resin layer (C) may be inserted.

The fusion-bonding surface fastener obtained by the present invention has a backcoat layer side laminated on an adherend made of a polyolefin-based resin, and has a temperature not lower than the melting point of the polyolefin-based resin and lower than the melting point of the surface-fastener constituent fibers or in the vicinity thereof. It is heated to a temperature, preferably near the melting point of the polyolefin resin, and pressed to heat-bond. Heat fusion is ultrasonic processing machine,
Various types of processing machines such as a high-frequency processing machine and a heat press machine are used, but it is preferable that the processing is carried out under appropriate temperature and pressure conditions. The fusion of the surface fastener and the adherend of the polyolefin type includes, in addition to the entire surface fusion, the fusion of the peripheral portion of the surface fastener, the linear shape provided at an appropriate interval to the surface, the lattice shape or the dot shape. It can be fused by partial fusion. The heating direction may be either on the surface fastener side, on the polyolefin side, or on both sides, and this should be changed depending on the shape of the adherend.

Examples of the polyolefin-based adherend include a polyolefin-based film or sheet, a film or sheet having a polyolefin-based resin as a surface layer, various molded products made of a polyolefin-based resin, and a molded product having a polyolefin-based resin as a surface layer. And all of these in the present invention,
It is called a polyolefin resin molded product.

The surface fastener used in the present invention is a weaving surface fastener as described above.
A hook-shaped engaging element or a mushroom-shaped engaging element attached to the surface by a weaving method, a large number of loop-shaped engaging elements engaging with these engaging elements attached by a weaving method, and a hook-shaped engagement Including those having both the element and the loop-shaped engaging element on the same base cloth surface. The surface fastener of the present invention includes a hook-shaped engaging element in place of the loop-shaped engaging element.

As the fibers constituting the surface fastener of the present invention, thermoplastic synthetic fibers are used in terms of engaging properties, physical properties, easiness of manufacturing, etc., but strength, elasticity, deformation recovery and other properties are used. From the viewpoint of the adhesiveness with the resin, etc., the polyamide fiber or the polyester fiber is preferable. Of course, some of the synthetic fibers may be replaced with natural fibers.

[0032]

EXAMPLES The present invention will be described in more detail with reference to Examples and Comparative Examples, but the present invention is not limited thereto.

[Reference Example] << Production of Polyurethane Resin Aqueous Dispersion >> 400 g of polytetramethylene glycol having a number average molecular weight of 1000, 302 g of isophorone diisocyanate, and 44.4 g of 2,2-dimethylolbutanoic acid were placed in a three-necked flask. It was weighed and stirred in a dry nitrogen atmosphere at 90 ° C. for 2 hours to quantitatively react the hydroxyl groups in the system to produce a polyurethane prepolymer. Then, the mixture was cooled to 55 ° C. and N, N-diethylaminoethanol 31.4 g
Was added to 685 g of distilled water over 5 minutes, and the mixture was stirred for 3 minutes for emulsification. Next, after adding 411 g of distilled water and stirring for 3 minutes, 58.5 g of piperazine hexahydrate and hydrazine monohydrate 1
An aqueous solution prepared by dissolving 3.1 g and n-butylamine (4.6 g) in distilled water (185 g) was added over 1 minute, and the mixture was further stirred for 3 hours to carry out a chain extension reaction to obtain a solid content weight of 3
A 6 wt% polyurethane resin aqueous dispersion was obtained.

Example 1 A polyfunctional epoxy compound (Epoxy crosslinking agent CR manufactured by Dainippon Ink and Chemicals, Inc. was added to 1000 g of the polyurethane resin aqueous dispersion obtained in Reference Example 1.
-5 L) 30 g and a thickener (RM-830 manufactured by Rohm and Haas Co.) 12 g were added and mixed well. The mixed solution thus obtained was applied to the back surface of a hook portion surface fastener having a width of 10 cm and made of nylon 66 fiber by a roll coater method (both the base fabric fabric constituent fiber and the monofilament for hook are nylon 66), and the solid content was 35 g. /
The coating was applied at a rate of m ^{2, and} the water was evaporated by drying at 120 ° C. for 2.5 minutes. Next, 400 g of the aqueous dispersion of polyurethane resin obtained in Reference Example 1 and a solid content weight of 36
wt% ethylene-ethyl acrylate-maleic anhydride copolymer (80 wt% of ethylene, ethyl acrylate 15
% Of a copolymer of 5% by weight of maleic anhydride), 15 g of a thickener (RM-830 manufactured by Rohm and Haas Co.) was added to a mixed solution of 600 g of an aqueous resin dispersion, and the mixture was sufficiently mixed in solid content. It is applied at a rate of 50 g / m ² , dried at 120 ° C for 2.5 minutes to evaporate the moisture, and then at 80 ° C.
It heat-processed in the atmosphere for 8 hours.

On the back surface of the surface fastener thus obtained, a film (thickness: 0.
3 mm) were overlapped, and both were heat-sealed with a high-frequency welder (FDW-320R manufactured by Fuji Denko Koki). Then, the adhesive strength of the heat-sealed portion was measured according to the 180-degree peeling method of JIS-Z-0237. The results are shown in Table 1. As is clear from Table 1, the olefin resin adherend exhibited a good fusion property.

[Example 2] Polyuree obtained in Reference Example 1
Polyfunctional epoxy compound in 1000 g of tan resin aqueous dispersion
(Dainippon Ink and Chemicals, Inc. epoxy cross-linking agent CR
-5 L) 30 g and thickener (made by Rohm and Haas)
12 g of RM-830) was added and mixed well. This
By the roll coater method, the mixed solution thus obtained is
10 cm wide hook surface made of nylon 66 fiber
Fasteners (base fabric textile constituent fibers and hook monofilaments
Lament is 35g in solid content on the back of nylon 66)
/ M ^TwoAt a ratio of 2.5 and dried at 120 ° C for 2.5 minutes.
More water was evaporated. Next, solid content weight 36 wt%
Ethylene-ethyl acrylate-maleic anhydride copolymerization
Body (80% by weight of ethylene, 15% by weight of ethyl acrylate)
%, A copolymer of 5% by weight of maleic anhydride)
A polyfunctional epoxy compound (Dainippon Ink
Chemical Industry Co., Ltd. epoxy cross-linking agent CR-5L) 30 g
And thickener (RM-830 made by Rohm and Haas)
15 g was added, and the mixture was mixed well and the solid content was 50 g / m 2.
^TwoBy coating and drying at 120 ° C for 2.5 minutes
Evaporate water and heat treatment at 80 ℃ for 8 hours
did.

On the back surface of the surface fastener thus obtained, a film (thickness 0.3 mm) made of various olefinic resins was superposed, and both were heat-melted by a high-frequency welder (FDW-320R manufactured by Fuji Denko Koki Co., Ltd.). I wore it. Then, the adhesive strength of the heat-sealed portion was measured according to the 180-degree peeling method of JIS-Z-0237. The results are shown in Table 1. As is clear from Table 1, the olefin resin adherend exhibited a good fusion property.

[Example 3] 500 g of the polyurethane resin aqueous dispersion obtained in Reference Example 1, an ethylene-ethyl acrylate-maleic anhydride copolymer having a solid content of 36% (80% by weight of ethylene, 15% of ethyl acrylate) Wt%, maleic anhydride 5 wt% copolymer) aqueous resin dispersion 50
30 g of a polyfunctional epoxy compound (Epoxy cross-linking agent CR-5L manufactured by Dainippon Ink and Chemicals, Inc.) and a thickener (RM-830 manufactured by Rohm and Haas) in 0 g of a mixed solution.
5g was added and mixed well. 50 g of solid content was applied to the back surface of a hook portion surface fastener with a width of 10 cm formed of nylon 66 fiber by the roll coater method (both the base fabric fabric constituent fiber and the monofilament for hook are nylon 66) by a roll coater method. The coating liquid was applied at a ratio of / m ^2, the water content was evaporated by drying at 120 ° C. for 2.5 minutes, and then heat treatment was performed for 8 hours in an atmosphere of 80 ° C.

On the back surface of the surface fastener thus obtained, a film (thickness: 0.
3 mm) were overlapped, and both were heat-sealed with a high-frequency welder (FDW-320R manufactured by Fuji Denko Koki). Then, the adhesive strength of the heat-sealed portion was measured according to the 180-degree peeling method of JIS-Z-0237. The results are shown in Table 1. As is clear from Table 1, the olefin resin adherend exhibited a good fusion property.

Example 4 A polyfunctional epoxy compound (Epoxy crosslinking agent CR manufactured by Dainippon Ink and Chemicals, Inc. was added to 1000 g of the aqueous dispersion of the polyurethane resin obtained in Reference Example 1.
-5 L) 30 g and a thickener (RM-830 manufactured by Rohm and Haas Co.) 12 g were added and mixed well. The mixed solution thus obtained was applied to the back surface of a hook portion surface fastener having a width of 10 cm and made of nylon 66 fiber by a roll coater method (both the base fabric fabric constituent fiber and the monofilament for hook are nylon 66), and the solid content was 35 g. /
The coating was applied at a rate of m ^{2, and} the water was evaporated by drying at 120 ° C. for 2.5 minutes. Then, 400 g of the aqueous dispersion of polyurethane resin obtained in Reference Example 1 and a solid content weight of 24
wt% polypropylene block and ethyl acrylate-
A polyfunctional epoxy compound (Dainippon Ink Co., Ltd.) was added to a mixture of 900 g of an aqueous resin dispersion of a block copolymer having an acrylic acid copolymer block (propylene 50% by weight, ethyl acrylate 45% by weight, acrylic acid 5% by weight). 30 g of epoxy cross-linking agent CR-5L manufactured by Kagaku Kogyo Co., Ltd. and 20 g of a thickener (RM-830 manufactured by Rohm and Haas Co.) were added, and a sufficiently mixed liquid was coated at a solid content of 50 g / m ^2. Moisture was evaporated by drying at 120 ° C. for 2.5 minutes, and heat treatment was further performed at 80 ° C. for 8 hours.

On the back surface of the surface fastener obtained as described above, a film (thickness: 0.
3 mm) were overlapped, and both were heat-sealed by a high frequency welder (FDW-320R manufactured by Fuji Denko Koki Co., Ltd.). Then, the adhesive strength of the heat-sealed portion was measured according to the 180-degree peeling method of JIS-Z-0237. The results are shown in Table 2. As is clear from Table 2, the olefin resin adherend exhibited a good fusion property.

[Example 5] Solvent type urethane resin ("Chris Bonn AH-82" manufactured by Dainippon Ink and Chemicals, Inc.
5 "), 1000 g of polyfunctional isocyanate compound (isocyanate crosslinking agent" Coronate L "manufactured by Nippon Polyurethane Industry Co., Ltd.) and 1500 g of ethyl acetate were added and mixed sufficiently. The mixed solution thus obtained was used in a roll coater method to form hook-and-loop fasteners with a width of 10 cm formed of nylon 66 fibers (both the base fabric fabric constituent fibers and the monofilaments for hooks are nylon 6
A solid content of 35 g / m ² was applied to the back surface of 6) and dried. Next, ethylene with a solid content weight of 15 wt%
A polyfunctional epoxy compound (Dainippon Ink and Chemicals, Inc.) was added to 1000 g of a toluene solution of an ethyl acrylate-maleic anhydride copolymer (a copolymer of 80% by weight of ethylene, 15% by weight of ethyl acrylate and 5% by weight of maleic anhydride). Company-made epoxy cross-linking agent CR-5L) 10 g was added, and a sufficiently mixed liquid was coated at a solid content of 40 g / m ² and dried, and further heat-treated at 50 ° C. for 24 hours.

On the back surface of the surface fastener obtained in this manner, a film (thickness: 0.3 mm) made of various olefinic resins was superposed, and both were heated by a high frequency welder (FDW-320R manufactured by Fuji Denkoki Co., Ltd.). Fused. Then, the adhesive strength of the heat-sealed portion was measured according to the 180-degree peeling method of JIS-Z-0237. The results are shown in Table 1. As is clear from Table 1, the olefin resin adherend exhibited a good fusion property.

Comparative Example 1 1000 g of the aqueous dispersion of the polyurethane resin obtained in Reference Example 1 was mixed with a polyfunctional epoxy compound (Epoxy crosslinking agent CR manufactured by Dainippon Ink and Chemicals, Inc.).
-5 L) 30 g and a thickener (RM-830 manufactured by Rohm and Haas Co.) 12 g were added and mixed well. The mixed solution thus obtained was applied to the back surface of a hook-type surface fastener fiber fabric having a width of 10 cm formed of nylon 66 fiber and a loop portion surface fastener having a width of 10 cm formed of nylon 6 fiber by a roll coater method. The solid content was applied at a rate of 35 g / m ^{2, and} the water was evaporated by drying at 120 ° C. for 2.5 minutes, and further 8 hours at 80 ° C.
Heat treated for hours. A film (thickness: 0.3 mm) made of various olefin resins was superposed on the back surface of the surface fastener thus obtained, and both were heat-sealed by a high-frequency welder (FDW-320R manufactured by Fuji Denko Koki Co., Ltd.). . Then, the adhesive strength of the heat-sealed portion was measured according to the 180-degree peeling method of JIS-Z-0237. The results are shown in Tables 1 and 2. As is clear from Tables 1 and 2, the fusion bondability was clearly inferior to the olefin resin adherend.

Comparative Example 2 Aqueous resin dispersion of ethylene-ethyl acrylate-maleic anhydride copolymer having a solid content of 36 wt% (80 wt% ethylene, 15 wt% ethyl acrylate, 5 wt% maleic anhydride). To 1000 g of the liquid, 30 g of a polyfunctional epoxy compound (Epoxy crosslinking agent CR-5L manufactured by Dainippon Ink and Chemicals, Inc.) and 15 g of a thickener (RM-830 manufactured by Rohm and Haas) were added and mixed well. The mixed solution thus obtained was applied with a roll coater system to a width of 10 with nylon 66 fibers.
cm hook side surface fastener back side and nylon 6
It is applied at the solid content of 50 g / m ² on the back surface of the loop fastener having a width of 10 cm and formed of fibers, and the temperature is 120 ° C.
Water for 2.5 minutes to evaporate the water and
It heat-processed for 8 hours in the atmosphere. A film (thickness: 0.3 mm) made of various olefinic resins was superposed on the surface fastener thus obtained, and both were heat-sealed by a high-frequency welder (FDW-320R manufactured by Fuji Denko Koki Co., Ltd.), and JIS- The adhesive strength was measured according to the 180 degree peeling method of Z-0237. The results are shown in Table 1. As is clear from Table 1, the fusion bondability was obviously inferior to the olefin resin adherend.

[Comparative Example 3] 1000 g of the aqueous dispersion of polyurethane resin obtained in Reference Example 1 was mixed with a polyfunctional epoxy compound (epoxy crosslinking agent CR manufactured by Dainippon Ink and Chemicals, Inc.).
-5 L) 30 g and a thickener (RM-830 manufactured by Rohm and Haas Co.) 12 g were added and mixed well. The mixed solution thus obtained was applied to the back surface of a hook portion surface fastener having a width of 10 cm and made of nylon 66 fiber by a roll coater method (both the base fabric fabric constituent fiber and the monofilament for hook are nylon 66), and the solid content was 35 g. /
The coating was applied at a rate of m ^{2, and} the water was evaporated by drying at 120 ° C. for 2.5 minutes. Then, 50 g of hot-melt resin powder of ethylene-vinyl acetate copolymer on it.
/ M ² and heated and melted, then heat-bonded to a film (thickness 0.3 mm) made of various olefin resins by a high frequency welder (FDW-320R manufactured by Fuji Denko Koki Co., Ltd.), and then subjected to JIS-Z- The adhesive strength was measured according to the 180 degree peeling method of 0237. The results are shown in Table 1.
As is clear from Table 1, the fusion bondability was obviously inferior to the olefin resin adherend.

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[Table 1]

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[Table 2]

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EFFECTS OF THE INVENTION According to the present invention, a surface fastener having good adhesiveness to an adherend made of a polyolefin resin and having excellent durability can be obtained.

Claims (9)

[Claims] 1. A resin layer (B) and a resin layer (C) are sequentially laminated on the back surface of a surface fastener (A) made of synthetic fiber, and the following conditions are satisfied: the resin layer (B) is the back surface of the surface fastener. The resin layer (C) is formed by applying the resin liquid onto the resin layer (C), and the resin layer (B) is formed by applying the resin liquid onto the resin layer (B). A fusion-bonding surface fastener, characterized in that it contains a system-based crosslinked polar resin and that the resin layer (C) contains a polyolefin-based resin. 2. A resin layer (D) is laminated on the back surface of a surface fastener (A) made of synthetic fiber, and the following conditions and the resin layer (D) are formed by applying a resin liquid on the back surface of the surface fastener. The fusion-bonding surface fastener characterized in that the resin layer (D) contains a non-polyolefin-based crosslinked polar resin and a polyolefin-based resin. 3. The fusion-bonding surface fastener according to claim 1, wherein the resin layer (B), the resin layer (C) and the resin layer (D) are formed from an aqueous resin liquid. 4. The fusion-bonding surface fastener according to claim 1, wherein the crosslinked polar resin is a crosslinked polyurethane resin. 5. The polyolefin resin is a resin synthesized from 30 to 95% by weight of α-olefin monomer, 5 to 60% by weight of (meth) acrylic acid derivative, and 0 to 30% by weight of other monomer. Or the fusion-bonding surface fastener according to 2. 6. The fusion-bonding surface fastener according to claim 5, wherein the α-olefin monomer is ethylene and / or propylene. 7. The polyurethane resin has a molecular weight of 500 to 500.
3000 polymer polyols, organic diisocyanates,
The fusion-bonding surface fastener according to claim 4, which is a polyurethane obtained by using a chain extender and 2,2-dimethylolalkanoic acid as main raw materials. 8. A polyolefin resin molded article with a surface fastener, wherein the resin layer (C) of the surface fastener for fusion bonding according to claim 1 is integrated on the surface of a molded article made of a polyolefin resin by heat fusion. 9. A polyolefin resin molded article with a surface fastener, wherein the resin layer (D) of the surface fastener for fusion bonding according to claim 2 is integrated on the surface of a molded article made of a polyolefin resin by heat fusion.