JPS6055630B2 - Manufacturing method for heat-set fabric products - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method of manufacturing a fabric product having folds or bends.

In particular, the present invention relates to a fabric product having a folded or bent portion of a fabric using ultrafine fibers and/or a fabric using an elastic polymer, and a method for manufacturing the same. First, in order to make it easier to understand the purpose of the present invention, an example of two Ξ will be given and explained. However, the purpose of the present invention is not limited in any way by these examples. (B) In the case of fabrics using ultra-fine fibers (new issue 1) Fabrics using ultra-fine fibers have become extremely common, as seen in suede-like fabrics.

This is because of its suppleness, good texture, good touch, and good appearance. However, when it is made into pants, etc., it is difficult for the pants to have folds, and even if they do, they are so thin that they bend in various ways, resulting in pants that have no pleats, no creases, and are ugly. I get used to it. In other words, it is necessary for the folded portion to be heat-set by ironing, etc., so that the pleats remain intact. They discovered new challenges associated with high-level processing (final product production) of such fabrics. One of the objects of the present invention is to solve such problems.

(b) In the case of fabrics containing elastic polymers (new issue 2) Fabrics containing elastic polymers in addition to fibers can be used in the clothing field, as seen in suede-like artificial leather and silver-finished artificial leather. Needless to say, the progress has been remarkable.

Such materials are generally difficult to provide products with high wrinkle resistance.

As a general trend, fabrics made of elastic material with a low melting point are certainly easier to heat set, and folds, pleats, splits (stitches), etc., will come out neatly. However, in such materials, the structure changes due to softening or melting of the elastic body, and the feel deteriorates. In addition, a phenomenon called "hitting" or "shining" occurs, which deteriorates the finished state of the product. On the other hand, fabrics made with an elastic material having a high melting point are not easily deformed by heat with ironing, so they are difficult to pleat, difficult to crease, and difficult to determine the exact split pattern when sewing. Although this partially overlaps with the above description, materials that are difficult to follow deformation (hard to wrinkle) and have high impact resilience often exhibit this phenomenon. Although these phenomena make sewing finishing difficult (from an aesthetic point of view), they have very excellent characteristics. While taking advantage of its excellent aesthetic characteristics and excellent practical characteristics,
One piece of clothing was not created in general. It is an object of the present invention to avoid the phenomenon of being criticized for having made a cylinder. (c) Avoidance of new concomitant drawbacks associated with means (
New issue 3) New means to solve problems
With other problems, its effectiveness is halved.

In other cases, due to the new drawbacks, it will not be put into practical use at all. We will discuss the means later, but it is essential to keep their shortcomings to a minimum. (1) There is no need to use flammable or toxic organic solvents.

(i) The finish should be soft without significantly hardening the texture.

(iii) Easily hardened or resinized by ironing.

(Iv) Do not yellow due to light or heat.

Resistant to aging and deterioration during practical use. (V) Dissolves during dry cleaning, etc., resulting in staining, and is difficult to dissolve in perfumes and other organic solvents.

(Vi) Also, if possible, parts or areas that are not heat set should be able to be washed off even if accidentally deposited.

(d) Fields that require heat setting properties, not only for clothing, but also for artificial flowers and molded products (New Issue 4) When making molded products such as artificial flowers, there are many times when it is necessary to determine the shape exactly.

We found that a corresponding solution was needed.
There are also cases where the texture is too soft and you would like it to have a little more waist.

We have also found that a solution is needed in such cases. (e) Preventing fraying in woven and knitted fabrics (new issue 5) Non-woven fabric-based artificial leather can be sewn without overlocking.
It exhibits excellent characteristics.

This not only streamlines the sewing process, but also often creates products that are aesthetically pleasing. I want to achieve this with woven and knitted fabrics as well. In order to achieve these goals, we considered various things and succeeded in each of them, and as a result, we were able to solve all of the problems mentioned above.

The outline of its configuration is as follows.

When creating seam allowances and folding allowances for "fabric sheets containing ultrafine fibers of 0.3 denier or less," a polyurethane water emulsion is applied to the inside of the folded parts, and then,
In a method for producing a heat-set fabric product by heat-setting or heat-press setting, the polyurethane water emulsion is a non-yellowing polyisocyanate selected from hexamethylene diisocyanate, isophorone diisocyanate, methylene bis(4-cyclohexyl isocyanate) and an average functional group number. A polyurethane water emulsion having a crosslinked structure obtained by chain-extending a prepolymer having an isocyanate end group consisting of a polyhydroxyl compound (singlely or in a mixture) having a polyhydroxyl compound having a polyhydric acid of 2.01 to 3.0 with a water-soluble chain extender is used. A method for producing a heat-set fabric product characterized by:

More specifically, the present invention is flexible, has excellent light resistance, does not contain organic solvents that are toxic or harmful to the human body, is easily rubberized using the most popular hot iron, and is capable of forming a bent portion that is the object of the present invention. This made it possible to heat set the temperature. This has achieved ground-breaking high added value to the above-mentioned materials.

In other words, apply it to the back side of each target part,
The product was applied by spraying, ironed in the desired shape, and heat-set with a heat breather, successfully solving all of the above-mentioned problems (effects).

At this time, it is preferable to prevent the back side from penetrating too much and causing the surface to become glossy or dirty, as if coated with a comb or resin. When set, the backs may touch each other, but this phenomenon does not prevent the present invention in any way.

At this time, these pecking can be easily separated by peeling them off by hand. However,
If you don't need it, you can leave it as is. Polyurethane water emulsions are polyurethane dispersed in a water-based medium.

Polyurethanes are generally obtained by chain extension of prepolymers with isocyanate end groups consisting of organic polyisocyanates and polyhydroxyl compounds.
The organic polyisocyanate has a molecular weight of 130 to 1
000 aromatic, aliphatic, and cycloaliphatic and combinations thereof.

Typical examples include hexamethylene diisocyanate,
Examples include diisocyanates such as isophorone diisocyanate and methylene bis(4-cyclohexyl isocyanate). Further, a trifunctional or higher functional polyisocyanate may be used in whole or in part. A portion of monoisocyanate may also be used in combination. In order to obtain a water emulsion of polyurethane that is less discolored by light and has less strength loss, among these polyisocyanates, so-called non-yellowing type polyisocyanates such as hexamethylene diisocyanate, isophorone diisocyanate, and methylene bis(4-cyclohexyl isocyanate) are used. It is preferable to use

The polyhydroxyl compound has a molecular weight of 62 or more,
Preferably, those known in polyurethane chemistry of 62 to 10,000 are mentioned.

For example, ethylene glycol, diethylene glycol,
The initiator is one or more compounds having at least two active hydrogens such as glycerin and trimethylol rubber, and ethylene oxide, propylene oxide,
These are polyethers produced by addition polymerization of one or more monomers such as butylene oxide, tetrahydrofuran, and cyclohexylene oxide by a conventional method. In addition, one or more compounds having at least two hydroxyl groups such as ethylene glycol, diethylene glycol, butanediol, neopentyl glycol, hexanediol, glycerin, maleic acid, adipic acid, phthalic acid, trimellitic acid, etc. One of the compounds having at least two carboxyl groups, such as
In addition to those obtained by dehydration condensation reaction with a species or two or more species, ring-opening polymerization is performed in the presence of an initiator having one or more hydroxyl groups such as cyclic ester compounds such as δ-valerolactone and E-caprolactone. Also included are polyesters obtained by

Furthermore, in addition to dihydroxypolycarbonates and dihydroxypolyacetals, low-molecular compounds such as ethylene glycol, diethylene glycol, butanediol, neopentyl glycol, hexanediol, glycerin, and trimethylolpropane may be mentioned, but are not particularly limited to these. Not.

Also, small amounts of monohydroxy compounds may be used in combination with polyhydroxy compounds. In order to obtain a fabric product with good performance, for example, without deterioration in performance even after dry cleaning, it is preferable to apply a water emulsion having a crosslinked structure.

In the case of a polyurethane water emulsion, one having a crosslinked structure can be obtained by using a polyhydroxyl compound (alone or in a mixture) having an average functional group number of about 2.0 or more, preferably from 2.01 to 3.0. Here, the number of functional groups refers to the number of hydroxyl groups per molecule, and for a mixture, it is the value obtained by dividing the total number of hydroxyl groups by the total number of molecules. However, when the average number of functional groups exceeds 3, the polyurethane becomes hard, and the bent portions of the resulting heat-set product also become hard, which is inconvenient for use. The preparation of prepolymers having isocyanate end groups is carried out in the presence or absence of isocyanate-inert solvents such as toluene, methyl ethyl ketone, ethyl acetate, trichloroethylene, etc., generally at temperatures of about 40 to 13 degrees Celsius. .

If a solvent is used, it is desirable to remove the solvent in a later step. Catalysts known in Ureta 7 chemistry, such as tertiary amines and tin compounds, may be used to accelerate the reaction. The total number of isocyanate groups is 1 of the total number of hydroxyl groups.
．． 2-4. The amount of polyisocyanate used is such that C@. The isocyanate group-terminated prepolymer obtained in this way can be emulsified using general emulsifying equipment.
However, preferably, a stable water emulsion with smaller particle size can be produced by passing it through an emulsifier that forcibly reduces the particles, such as a homogenizer or colloid mill.

An emulsifier may be used to emulsify the prepolymer, if necessary. The amount of emulsifier (solid content) used is 10% of the prepolymer
The amount is 2 parts by weight or less, preferably 1 part by weight or less, based on 0 parts by weight. As the emulsifier, one type from among known emulsifiers, anionic emulsifiers, cationic emulsifiers, nonionic emulsifiers, etc., or two or more types can be used in combination.

Dispersion of the isocyanate group-terminated prepolymer in water is approximately 9
Preferably, the temperature is 0'C or lower.

As the chain extender, various compounds known in polyurethane chemistry can be used. A typical example is a polyamine compound. Those with a molecular weight of 17 to 500, such as primary or secondary diamines, typical examples include ethylenediamine, hexamethylenediamine, toluenediamine, xylylenediamine, diaminodiphenylmethane, diamincyclohexylmethane, piperazine, isophoronediamine, etc. In addition to aliphatic, alicyclic, and aromatic diamines, those having 3 or more functional groups, such as lysine diaminoethyl ester, diethylenetriamine,
There are polyamines such as triethylenetetramine. Other examples include ammonia, hydrazine, dihydrazides, and amino acid dihydrazides. In addition to polyamine compounds, water and polyhydroxyl compounds can also be used as chain extenders. In the case of partial chain extension, a chain extender may be added and reacted before dispersing the prepolymer in water.

However, the chain extender is generally added during and/or after dispersing the prepolymer in water. Here, the chain extender added is preferably a water-soluble type. The chain extension reaction is usually carried out at 90C or lower. The proportion of polyurethane in the polyurethane water emulsion is 75% by weight or less of the total emulsion, preferably in the range of 2 to 6% by weight.

The dispersion medium of the polyurethane water emulsion is mainly composed of water, and it is desirable that the amount of water in the dispersion medium is about 60% or more, and it is especially preferable that the dispersion medium consists entirely of water. To prevent the emulsion liquid from seeping out onto the surface, you can apply or wipe it without applying too much liquid at once.

However, if it still seeps to the front side, try applying a water repellent to the front side, applying glue to the front side and removing the applied glue from the back side, increasing the concentration of the emulsion, or increasing the viscosity. It is particularly preferable to add or use an agent. The method of the present invention does not run off during washing and does not run off during dry cleaning.

The amount of emulsion applied can be increased or decreased as appropriate depending on the purpose.

The secret to achieving good heat setting is to heat set the folded portion in its bent state.

It is also possible to soak it into the interlining, sandwich it together with the interlining, and heat-set it with an iron or the like.

The method of the present invention is not only good for finishing the creases and splits, but also for fixing the shape of artificial flowers (applying it to the back and fixing it while adjusting the shape with a hot air dryer). Furthermore, it has been found that it is extremely effective in preventing the bulging phenomenon at the collar and sleeves that is associated with suede-like artificial leather.

The present invention can be effectively utilized for all kinds of clothing, furniture, breads, all industrial and transportation parts, decorative items such as artificial flowers, display items, and the like.

It can also be used for ultra-fine fibers such as wool, cotton, and rayon, as well as for items other than PU products. Examples will be shown next, but the effectiveness of the present invention is not limited to or constrained by these.

Example 1 Pants were made using suede-like artificial leather (“Exsaine 1; Melange-like” manufactured by Toray Industries, Inc.).

These pants do not have pants lines due to seaming.
A crease was added using a regular iron. After that, the pants were turned inside out, and absorbent cotton was soaked with the polyurethane water emulsion described later in the form of a stripe along the crease, and lightly dabbed on the front and back side. After that, I turned the item inside out to return it to its normal state, and pressed the iron firmly from above to gently apply the iron. If this is ignored, it will be completely insolubilized in a solvent such as DMF if it is heated at a higher temperature for a longer period of time (usually several minutes).

Thus, the finished trousers are much cleaner and have a better finish than those that do not have the structure of the present invention, and even when worn for a long time, they are superior to those that do not have the structure of the present invention. Ta. Method for Preparing a Polyurethane Water Emulsion A polyurethane water emulsion suitable for limited use according to the present invention was prepared as follows.

74% of polyoxybutylene glycol with an average molecular weight of about 2000 was placed in a reaction vessel. 24. Polycaprolactone diol with an average molecular weight of about 2000. 9.5 parts by weight of polyoxyethylene glycol with an average molecular weight of about 2,000, 13.5 parts by weight of polyoxypropylene triol with an average molecular weight of about 1,000, and 6 parts by weight of polyoxyethylene glycol monomethyl ether with an average molecular weight of about 2,000.
8 parts by weight, methylene bis(4-cyclohexyl isocyanate) 39. Heel mass: 0 dibutyltin dilaurate
．． Weigh out 015 parts by weight and heat at approximately 70°C under a nitrogen stream.
．． After reacting for an hour, add 21. Heel weight preparation, 75
3. further at ℃. After a period of reaction, a prepolymer with isocyanate group terminals was obtained.

150g of this prepolymer and "゜Neogeso゛S-20" (Daiichi Kogyo Seiyaku Co., Ltd., solid content 2 weight%) as an emulsifier
7.5 g was placed in a container, stirred vigorously with a homogenizer, and 225 g of water was added in about 1 portion, and immediately 87.5 g of an aqueous solution containing 1.7% hydrazine hydrate was added.
was added over about 1 minute, and stirring was continued for about 2 more times to obtain a polyurethane water emulsion with a resin content of about 30%.

Example 2 Suede-like brushed fabric (using ultra-fine fibers).

Example 1 using Torayina V-1 manufactured by Toray Industries, Inc.
By making pants in the same manner as above, we were able to make soft pants with firm creases (compared to pants that do not use this structure, the creases, aesthetic finish, and durability of the creases are far superior). ). Example 3 A composite sheet as disclosed in JP-A No. 53-49168, that is, a new cashmere-like raised material in which silicone resin and polyurethane are applied in two stages instead of simple polyurethane to an ultrafine fiber nonwoven fabric base. I made a coat using it.

Claims (1)

[Claims] 1 Heat setting, in which a polyurethane water emulsion is applied to the inside of the folded part when creating seam allowances and folding allowances in a fabric sheet containing ultrafine fibers of 0.3 denier or less, and then heat setting or heat press setting is performed. In the method for producing a fabric product, the polyurethane water emulsion is a non-yellowing polyisocyanate selected from hexamethylene diisocyanate, isophorone diisocyanate, methylene bis(4-cyclohexyl isocyanate) and polyhydroxyl having an average functional group number of 2.01 to 3.0. A method for producing a heat-set fabric product characterized by using a polyurethane water emulsion having a crosslinked structure obtained by chain-extending a prepolymer having an isocyanate end group consisting of a compound (single or a mixture) with a water-soluble chain extender. .