JPH093782A - Adhesive base cloth - Google Patents

Abstract

(57) [Abstract] [Purpose] The invention of the present application is to make a paste containing adhesive particles heat-sensitive and coagulate at a temperature lower than a temperature at which drying and sintering are performed, so that a space between fibers of a cloth, particularly an interlining, is obtained. It is an object of the present invention to provide an adhesive interlining material having a high adhesive force that prevents the adhesive from seeping through. The present invention relates to an adhesive base cloth having an adhesive composed of acrylonitrile-alkyl acrylate copolymer particles and a heat-sensitive coagulant.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an adhesive interlining in which a paste containing an acrylonitrile-alkyl acrylate copolymer particle and a heat-sensitive coagulant, especially a zinc complex salt is adhered to an interlining base cloth, dried and sintered.

[0002]

2. Description of the Related Art Conventionally, a cloth having an adhesive, particularly an adhesive interlining, has an acrylonitrile-particle size of 0.1 to 1 μm.
It is manufactured by applying a paste containing alkyl acrylate-based copolymer particles to an interlining base fabric, followed by drying and sintering. However, in this interlining, when the copolymer loses its thickening effect at the time of drying and sintering and its viscosity becomes low, the copolymer particles permeate into the interlining, so that the adhesive force with the outer material cannot be obtained. There was a problem. In addition, Japanese Examined Japanese Patent Publication 48-19
81, Japanese Patent Publication No. 50-22634, Japanese Patent Publication No. 51-24
The powder of the acrylonitrile-alkyl acrylate copolymer disclosed in, for example, No. 618 has a particle diameter of 100 to 100.
There was a problem that it was too large as 1000 μm and could not be made into a paste.

[0003]

The inventors of the present application have
It was found that the adhesive does not permeate between the fibers of the cloth, especially the interlining, by thermally coagulating the paste containing the particles of the adhesive at a temperature lower than the temperature for drying and sintering, and completed the invention of this application. The invention of this application is
It is an object of the present invention to provide an adhesive interlining having a high adhesive force, which solves the problems of these conventional adhesive interlinings.

[0004]

The invention of the present application is to apply a paste containing an acrylonitrile-alkyl acrylate copolymer particle and a heat-sensitive coagulant, especially a zinc complex salt to a base cloth, especially an interlining base cloth, and dry and sinter it. The present invention relates to an adhesive base cloth, particularly an adhesive interlining.

The acrylonitrile-alkyl acrylate copolymer is obtained by emulsion polymerization, suspension polymerization or the like, but usually 0.1 to 1 mμ obtained by emulsion polymerization.
Copolymer particles are used. As the acrylonitrile-alkyl acrylate copolymer, acrylonitrile-ethyl acrylate copolymer, styrene-acrylonitrile-alkyl acrylate copolymer, glycidyl acrylate-acrylonitrile-alkyl acrylate copolymer, glycidyl methacrylate-acrylonitrile-alkyl acrylate copolymer Are suitable.

In the acrylonitrile-ethyl acrylate copolymer, examples of monomers copolymerizable with acrylonitol and ethyl acrylate include styrene, acrylamide and its derivatives, vinyl acetate, acrylic acid, alkyl methacrylate, and other alkyl acrylates. , They may be copolymerized. The acrylonitrile-ethyl acrylate copolymer has a composition ratio of acrylonitrile and ethyl acrylate of 20 to 65% by weight of acrylonitrile and 80 to 80% of ethyl acrylate.
35% by weight is preferred. If the acrylonitrile content is 20% by weight or less and the ethyl acrylate content is 80% by weight or more, the water resistance, alkali resistance and solvent resistance may be deteriorated. Washing resistance and dry cleaning resistance may be poor. If the acrylonitrile content is 65% by weight or more and the ethyl acrylate content is 35% by weight or less,
The melting temperature becomes a high temperature of 150 ° C. or higher, and the adhesive interlining material using the same may have poor adhesiveness with the fabric, and if it is forcibly fused at a high temperature, the fabric may be damaged or deteriorated. The intrinsic viscosity of the acrylonitrile-ethyl acrylate copolymer (using a dimethylformamide solvent at 30 ° C.) is 0.3 to 0.8, and the melting temperature is 80 to 150.
C. is preferred.

Alkyl acrylate as a constituent of the styrene-acrylonitrile-alkyl acrylate terpolymer has an alkyl group having 1 to 4 carbon atoms, and includes methyl acrylate, ethyl acrylate, propyl acrylate and butyl acrylate. However, as the hot-melt adhesive for interlining of the invention of this application, ethyl acrylate is particularly preferable from the viewpoints of processability, adhesive strength and resistance of the resulting copolymer. Comonomers copolymerizable with styrene, acrylonitrile, and alkyl acrylate include acrylamide and its derivatives, vinyl acetate, methacrylonitrile, vinyltoluene, divinylbenzene, acrylic acid, glycidyl methacrylate, and other alkyl acrylates. It may be polymerized. The styrene-acrylotolyl-alkyl acrylate copolymer preferably has an intrinsic viscosity (30 ° C dimethylformamide solvent) of 0.3 to 0.7 and a melting temperature of 60 ° C to 150 ° C. Further, in the styrene-acrylonitrile-alkyl acrylate terpolymer, the composition ratio of styrene, acrylonitrile and alkyl acrylate is 3 to 30% by weight of styrene, 20 to 50% by weight of acrylonitrile and 20 to 77% by weight of alkyl acrylate. Is preferred. If the styrene content is less than 3% by weight, the water resistance and alkali resistance may be poor, and the adhesive interlining material using this may have poor washing resistance when bonded to fabric, and the styrene content is 30% by weight. %
When it becomes the above, solvent resistance may worsen, and the adhesive interlining material using this may be inferior in dry cleaning resistance. If the acrylonitrile content is 20% by weight or less or the alkyl acrylate content is 77% by weight or more, water resistance, alkali resistance and solvent resistance may deteriorate.
The adhesive interlining material using this may be inferior in the resistance to adhesion to the fabric, particularly the washing resistance and dry cleaning resistance. Further, if the acrylonitrile content is 50% by weight or more or the alkyl acrylate content is 20% by weight or less, the melting temperature becomes a high temperature of 150 ° C or more, and the fusion-bonded interlining material using this will have poor adhesion to the fabric. However, forcibly fusing at high temperature may damage or deteriorate the fabric.
Incidentally, in particular, when resistance of the adhesive after bonding the adhesive interlining with the surface material or the like is required, the adhesive is a heat-crosslinkable glycidyl acrylate-acrylonitrile-alkyl acrylate copolymer, or glycidyl methacrylate- It is preferable to use an acrylonitrile-alkyl acrylate copolymer.

As a comonomer copolymerizable with glycidyl acrylate or glycidyl methacrylate, acrylonitol and alkyl acrylate, vinyl acetate,
There are styrene, vinyltoluene, acrylic acid, methacrylic acid, alkylmethacrylate, other acrylic acrylate, etc., which may be copolymerized. The glycidyl acrylate-acrylonitrile-alkyl acrylate terpolymer or the glycidyl methacrylate-acrylonitrile-alkyl acrylate terpolymer has a glycidyl acrylate or glycidyl methacrylate content of 1 to 20% by weight, an acrylonitrile content of 20 to 50% by weight, and an alkyl acrylate (alkyl group). Has 1 carbon
4) Content is 30-79% by weight (total amount of monomer mixture is 100% by weight), intrinsic viscosity (30 ° C. dimethylformamide solvent) is 0.2-0.8, and 50 ° C.-150
Glycidyl acrylate-acrylonitrile-alkyl acrylate terpolymers or glycidyl methacrylate-acrylonitrile-alkyl acrylate terpolymers with melting temperatures of ° C can be obtained. In the glycidyl acrylate-acrylonitrile-alkyl acrylate terpolymer or the glycidyl methacrylate-acrylonitrile-alkyl acrylate terpolymer, the composition ratio of glycidyl acrylate or glycidyl methacrylate and acrylonitrile and alkyl acrylate is 1-20 glycidyl acrylate or glycidyl methacrylate. % By weight, acrylonitrile content 20 to 50% by weight, alkyl acrylate content 3 to
79% by weight is preferred. If the content of glycidyl acrylate or glycidyl methacrylate is less than 1% by weight, the water resistance and heat resistance due to cross-linking curing may deteriorate,
The adhesive interlining material using this may be inferior in high-temperature washing resistance for adhesion to the fabric. On the other hand, when the content of glycidyl acrylate or glycidyl methacrylate is 20% by weight or more, the stability may be deteriorated, and the adhesive interlining material using the same may have a slightly short shelf life. If the acrylonitrile content is 20% by weight or less or the alkyl acrylate content is 79% by weight or more, the water resistance, alkali resistance and solvent resistance may be poor. In particular, the washing resistance and dry cleaning resistance may be poor. Also, if the acrylonitrile content is 50% by weight or more or the alkyl acrylate content is 30% by weight or less, the melting temperature becomes a high temperature of 150 ° C or more, and the adhesive interlining using this may have poor adhesion to the fabric. , Forcibly adhering at high temperature may damage or deteriorate the fabric.

The paste is a solution of a copolymer containing acrylonitrile-alkyl acrylate copolymer particles obtained by emulsion polymerization or suspension polymerization, in particular about 50% of the solution, and a heat-sensitive coagulant, especially zinc complex salt, acryl. acid,
A paste can be prepared by adding a thickening agent such as sodium acrylate or ammonium acrylate, a dispersant and water. Alternatively, the acrylonitrile-alkyl acrylate copolymer particles obtained by emulsion polymerization or suspension polymerization may be added to water together with a heat-sensitive coagulant, a dispersant, and a thickener to form a paste.

Nonwoven fabrics, woven fabrics, knitted fabrics, and composite fabrics thereof are used as the base fabric, and the interlining base fabric is preferred. Particularly, a partially heat-bonded non-woven fabric (point-seal non-woven fabric) having a large number of dot-shaped heat-welded parts, a hydroentangled non-woven fabric, or a composite of these non-woven fabrics with a knitting structure such as chain stitch or denbi stitch is preferable.

The paste of the present invention is a paste prepared by adding acrylonitrile-alkyl acrylate copolymer particles and a heat-sensitive coagulant, especially a zinc complex salt, to water together with a dispersant and a thickener. The paste is applied in a pattern such as dots on the base cloth using a screen or the like, or once attached on the release paper or film and then transferred to the base cloth by a method such as transfer. However, it is preferable that the paste is attached to the base cloth with a screen or the like.

The paste can be applied to a base cloth, in particular, an interlining base cloth in a pattern such as a dot shape, a line shape or a grid shape, but it is preferable to apply the paste in a dot shape to the interlining base cloth.

A usual method is used for providing the dot shape, but a screen method is preferable. In addition,
It is desirable that the area of one dot is 0.1 to ³ mm ² and the number of dots is 10 to 200 dots / cm ² . Base cloth,
In particular, the paste applied in dots on the interlining fabric is heated by a dryer, heat-sensitively coagulates (gels), and then dried and sintered. Zinc complex salt acts by heating 3
The paste gels in the form of dots at 0 to 70 ° C, preferably at 40 to 60 ° C. Next, while maintaining this form, water is evaporated by drying, and the copolymer fuses between the copolymer particles and between the copolymer particles and between the copolymer particles and the base cloth by sintering.

The drying and sintering may be any means for fusing the copolymer particles and the copolymer particles, and the base cloth and the copolymer particles, but heating with hot air or infrared rays is particularly preferable.

According to the invention of the present application, the adhesive containing the copolymer is dried and sintered in the state of being heat-sensitively coagulated (gelled) by the action of the heat-sensitive coagulant, particularly the zinc complex salt. Since it does not seep into the gap, the applied adhesive can be used effectively, and since the excess adhesive is not contained between the fibers, the base cloth retains its original flexibility, In the case of the interlining, the properties of the outer material and the lining can be expressed as they are.

The invention of the present application will be described below with reference to specific examples.

【Example】

Example 1 Acrylonitrile-ethyl acrylate copolymer particles having a particle size of 0.1 to 1 μm (acrylonitrile content 46.
8% by weight, ethyl acrylate content 53.2% by weight, 3
Intrinsic viscosity in dimethylformamide solvent at 0 ° C 0.4
91, melting temperature 119 ° C.), a paste containing 5 parts by weight of a zinc complex salt, 3 parts by weight of ammonium nitrate, 3.5 parts by weight of polyacrylic acid, and water with respect to 100 parts by weight of the copolymer. Formed. This paste, fiber length 38m
A web made of polyester fiber of m and a fineness of 1 denier was hydro-entangled onto a non-woven fabric base cloth for interlining having a basis weight of 25 g / m ² , and was applied in a dot pattern using a random pattern screen. The number of dots is 37 / cm
^{At 2} , the area of one dot was 0.36 mm ² . Next, the paste-attached base fabric is heated at 120 ° C. for 1 minute with a dryer to heat-sensitively solidify (gelate), dry, and sinter, and the adhesive interlining with 14 g / m ^{2 of} adhesive attached. Got The adhesive interlining produced in this way is
Almost no acrylonitrile-ethyl acrylate copolymer adhesive permeated between the fibers. This adhesive interlining is adhered to a wool 100% gabardine cloth at a temperature of 140 ° C. with a pressing machine, and then the peel strength is measured with a tensile tester according to “JIS L 108 Adhesive cloth test method 6.19 Peel strength”. When measured, 1.2 kg
It showed a good adhesive force of / 5 cm width.

Comparative Example 1 An adhesive interlining material was obtained in the same manner as in Example 1 except that the zinc paste was not included in the adhesive paste. The adhesive interlining produced in this manner had an acrylonitrile-ethyl acrylate copolymer adhesive permeated between the fibers, and had a hard feel to the touch. This adhesive interlining is applied to a 100% wool gabardine cloth with a press at a temperature of 1
After bonding at 40 ° C., the peel strength was measured by a tensile tester to find that the width was 0.3 kg / 5 cm and the adhesive strength was in Example 1.
Was inferior to

Example 2 Acrylonitrile-ethyl acrylate copolymer particles having a particle size of 0.1 to 1 μm (acrylonitrile content 46.
8% by weight, ethyl acrylate content 53.2% by weight, 3
Intrinsic viscosity in dimethylformamide solvent at 0 ° C 0.4
91, melting temperature 119 ° C.), a paste containing 5 parts by weight of a zinc complex salt, 3 parts by weight of ammonium nitrate, 3.5 parts by weight of polyacrylic acid, and water with respect to 100 parts by weight of the copolymer. Formed. This paste, fiber length 38m
Randomly patterned screen is used on the interlining base fabric that is chain stitched to a non-woven fabric (point seal non-woven fabric) with a basis weight of 20 g / m ² that is a partial heat fusion of a web made of nylon fiber with a fineness of 1 denier. And attached in dots. The number of dots is 37 / cm ² ,
The area of one dot was 0.36 mm ² . next,
The paste-adhered base fabric was heated at 120 ° C. for 1 minute with a dryer to heat-sensitively solidify (gelate), dry, and sinter to obtain an adhesive interlining material with an adhesive of 12 g / m ² . . The adhesive interlining produced in this way is
Almost no acrylonitrile-ethyl acrylate copolymer adhesive permeated between the fibers. The adhesive interlining was adhered to a 100% wool gabardine cloth with a press at a temperature of 130 ° C., and the peel strength was measured with a tensile tester. As a result, a good adhesion of 1.0 kg / 5 cm width was exhibited.

Comparative Example 2 An adhesive interlining material was obtained in the same manner as in Example 1 except that the zinc paste was not included in the adhesive paste. The adhesive interlining produced in this manner had an acrylonitrile-ethyl acrylate copolymer adhesive permeated between the fibers, and had a hard feel to the touch. This adhesive interlining is applied to a 100% wool gabardine cloth with a press at a temperature of 1
After bonding at 30 ° C., the peel strength was measured by a tensile tester.
Was inferior to

Example 3 Styrene-acrylonitrile-ethyl acrylate copolymer particles having a particle size of 0.1 to 1 μm (styrene content 1
2.5% by weight, acrylonitrile content 34.8% by weight,
Ethyl acrylate content 52.7% by weight, inherent viscosity 0.406 in dimethylformamide solvent at 30 ° C., melting temperature 122 ° C.), 5 parts by weight of zinc complex salt per 100 parts by weight of copolymer, and 3 parts by weight Part of ammonium nitrate,
A paste containing 3.5 parts by weight of polyacrylic acid and water was formed. This paste, fiber length 38mm, fineness 1
On a 25 g / m ² basis weight non-woven base fabric for interlining, which is a hydroentangled web of denier polyester fibers,
It was deposited in dots using a random pattern screen. The number of dots was 37 / cm ² , and the area of one dot was 0.36 mm ² . Next, the paste-adhered base fabric was heated at a temperature of 120 ° C. for 1 minute by a dryer to be dried and sintered to obtain an adhesive interlining material having an adhesive of 14 g / m ² . In the adhesive interlining thus produced, the adhesive of the styrene-acrylonitrile-ethyl acrylate copolymer hardly permeated between the fibers. Wool 10 with this adhesive interlining
After adhering to a 0% gabardine cloth at a temperature of 140 ° C. with a press machine, the peel strength was measured with a tensile tester, and a good adhesion of 1.3 kg / 5 cm width was shown.

Example 4 Glycidyl methacrylate having a particle size of 0.1 to 1 μm
Acrylonitrile-ethyl acrylate copolymer particles (glycidyl methacrylate 4.5% by weight, acrylonitrile content 29.9% by weight, ethyl acrylate content 6
5.6% by weight, intrinsic viscosity 0.439 in dimethylformamide solvent at 30 ° C., melting temperature 103 ° C.), 5 parts by weight of zinc complex salt and 3 parts by weight of ammonium nitrate per 100 parts by weight of the copolymer. And a paste containing 3.5 parts by weight of polyacrylic acid and water was formed. This paste was applied on a non-woven fabric base cloth made of non-woven fabric having a basis weight of 25 g / m ² obtained by hydroentangling a web made of polyester fiber having a fiber length of 38 mm and a fineness of 1 denier, and using a random pattern screen to form dots. Attached to. The number of dots is 37 / cm ² , and the area of one dot is 0.36.
It was mm ² . Next, the base cloth with the paste attached is
It was dried and sintered by heating for 1 minute with a dryer at a temperature of 0 ° C. to obtain an adhesive interlining material having an adhesive agent attached thereto at 14 g / m ² . In the adhesive interlining material thus produced, the adhesive of the glycidyl methacrylate-acrylonitrile-ethyl acrylate copolymer hardly permeated between the fibers. After this adhesive interlining was adhered to a 100% wool gabardine cloth at a temperature of 140 ° C. by a press, the peel strength was measured by a tensile tester.
It showed a good adhesive strength of 2 kg / 5 cm width.

[0022]

EFFECTS OF THE INVENTION Acrylonitrile-alkyl acrylate copolymer particles do not permeate into the interlining base fabric due to progress of drying and sintering in the heat-sensitive coagulation (gelation) state due to the action of the heat-sensitive coagulant, especially zinc complex salt. Therefore, it is possible to obtain an adhesive interlining that does not contaminate the interlining base fabric, has a good texture, and has a high adhesive force with the outer material.

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Claims (9)

[Claims] 1. An adhesive base cloth comprising an adhesive comprising an acrylonitrile-alkyl acrylate copolymer particle and a heat-sensitive coagulant. 2. The adhesive base cloth according to claim 1, wherein the heat-sensitive coagulant is a zinc complex salt. 3. The adhesive base fabric according to claim 1, wherein the acrylonitrile-alkyl acrylate copolymer is an acrylonitrile-ethyl acrylate copolymer. 4. The adhesive base fabric according to claim 1 or 2, wherein the acrylonitrile-alkyl acrylate copolymer is a styrene-acrylonitrile-alkyl acrylate copolymer. 5. The acrylonitrile-alkyl acrylate copolymer is a glycidyl acrylate-acrylonitrile-alkyl acrylate copolymer or a glycidyl methacrylate-acrylonitrile-alkyl acrylate copolymer, according to claim 1 or 2. Adhesive base cloth. 6. A paste comprising an acrylonitrile-alkyl acrylate copolymer particle and a heat-sensitive coagulant is adhered to a base cloth, dried and sintered.
The adhesive base fabric according to any one of 1. 7. The adhesive base fabric according to claim 1, wherein the paste is a paste obtained by thickening an emulsion polymer of an acrylonitrile-alkyl acrylate copolymer. 8. The adhesive base fabric according to claim 1, wherein the base fabric is an interlining base fabric. 9. An adhesive for base cloth, comprising an acrylonitrile-alkyl acrylate copolymer particle and a paste containing a zinc complex salt.