JPS6241381A - Heat-fusible core cloth - 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 (Field of Industrial Application) The present invention relates to a heat-sealable interlining, and particularly to a heat-sealable interlining having excellent heat resistance and adhesive strength.

(Prior art) It has been known that hot-melt adhesive is adhered to a fiber base material in the form of powder, fiber, film, spots, etc. as a heat-fusion interlining. By fusing the interlining to the outer material during the work process without relying on stitching with threads, the work efficiency of m-manufactured products is improved and the finish is made beautiful. The hot melt adhesives used for this have been proposed to meet various physical property requirements, from polyamide adhesives to polyvinyl acetate and polyamide adhesives, and recently polyester adhesives and mixed adhesives containing these have been proposed. Agents also began to be used. (for example,
JP-A No. 59-49082. ) (Problem to be solved by the invention) In recent years, with the diversification of outer materials, there is a need for a heat-fusible interlining that can be bonded to a wide variety of outer materials and that can withstand dry cleaning and washing. It's starting to look like this.

Polyamide adhesives have strong adhesive strength, can be applied to a wide range of surface materials, have a good texture, and are highly resistant to dry cleaning, making them widely used. However, they have the disadvantage of poor heat resistance. There are many complaints about scuffing or peeling during finishing press or hot press after dry cleaning, and in particular, so-called strike-back or strike-through, where the resin oozes from the front and back surfaces, is desired to be improved. Ta.

This is a heat-sealable interlining made of a hot-melt adhesive containing nylon.

N-methoxymethylated nylon used in the present invention includes nylon 6.6, 6.6.10, 11.12.10.12
．． 12.12 grade nylon and 2 selected from these
N-methoxymethylated nylon copolymer consisting of a combination of more than one species.

These N-methoxymethylated nylons can be produced by a conventionally known method, that is, nylon or nylon copolymer is reacted by heating in a mixed solvent of alcohol and formaldehyde in the presence of a catalytic amount of acid, and the reaction solution is heated. A direct method in which the N-methoxymethylated product is recovered by pouring it into water while stirring, or a mixed solution of alcohol and formaldehyde is reacted with nylon or nylon copolymer dissolved in formic acid, and the reaction solution is stirred. This can be carried out by a formic acid method, etc., in which the N-methoxymethylated product is recovered by adding it to water.

The methoxymethylation rate of the N-methoxymethylated nylon used in the present invention is 10 to 35%, preferably 15 to 35%.
25% is suitable.

If the amount is less than 10%, the object of the present invention will not be achieved;
In this case, not only is production difficult, but also excellent effects cannot be obtained.

The hot melt adhesive of the present invention uses N-methoxymethylated nylon alone or in combination with general hot melt adhesives such as other polyamide resins, ethylene-vinyl acetate copolymers, polyethylene ionomers, and polyesters. be able to. The blending ratio of N-methoxymethylated nylon in the mixed hot melt adhesive is:
At least 5% by weight or more is required; if it is less than that, the effects of the present invention cannot be obtained.

To fix the hot melt adhesive onto the fiber base material, sprinkle powder or pellets onto the fiber base material. A, or apply a slurry of finely powdered hot melt adhesive suspended in a medium such as water, or a solution of hot melt adhesive dissolved in a solvent such as alcohol to the fiber base material. A film of a six-pronged hot-melt adhesive, which can be applied by applying or adhering in spots and then drying, may be laminated and fixed to the fiber base material.

The fused interlining of the present invention is thermally fused in the presence of an acid catalyst and, if necessary, subjected to post-heat treatment to cause a crosslinking reaction of N-methoxymethylated nylon, thereby dramatically improving heat resistance. It has characteristics that can be obtained.

Acid catalysts used during heat fusion include known citric acid, itaconic acid, geltaric acid, adipic acid, azelaic acid, oxalic acid, succinic acid, glycolic acid, malonic acid, crotonic acid,
Examples include V1 acids such as lactic acid, maleic acid, and tartaric acid, and non-m acids such as hypophosphorous acid. The amount of these acid catalysts used is
1 to 5% based on N-methoxymethylated nylon in the Botmelt adhesive is preferred.

These acid catalysts can be sprayed or applied as an aqueous solution onto the hot-melt adhesive surface of the interlining or the fabric immediately before heat-sealing, or they can be preliminarily fixed to the heat-sealable interlining together with the N-meth4 dimethylated nylon. You can also leave it there.

To fix the acid catalyst in advance, either the powder itself or fine pressure-sensitive or heat-sensitive microcapsules are sprinkled and attached to the fiber base material together with a powder or pellet hot melt adhesive, or Alternatively, a hot melt adhesive in slurry or solution form to which an acid catalyst has been added may be applied to the fiber base material and dried.

The heat fusion conditions for the interlining of the present invention include a temperature of 120 to 180°C;
Preferably 140-150°C, 0.1-2 K9/
It is desirable to carry out the treatment at a pressure of CD for 1 second to 60 seconds. Through this heat fusion, the hot melt adhesive melts and bonds the interlining and fabric with its anchoring effect.At the same time, due to the presence of an acid catalyst, the N-methoxymethylated nylon in the hot melt adhesive undergoes a crosslinking reaction as shown by the following formula. It raises the melting point and provides excellent heat resistance.

O I -(C12). -N-C- 1200H3 -(CH2). -N-C--(CH2). -N-C- One CH2+ CH2O,H -(CH2). -N-C- If this crosslinking reaction is insufficient due to the heat fusion conditions, a post-heat treatment is further performed at 120 to 150°C for about 5 to 10 minutes after the heat fusion to complete the crosslinking reaction. By doing so, excellent heat resistance can be obtained.

(Effects of the Invention) The N-methoxymethylated nylon itself in the hot-melt interlining hot-melt adhesive of the present invention has a low melting point and a low hot-melt viscosity, so the initial adhesion during heat bonding is good and the anchoring effect is excellent. High adhesive strength.

On the other hand, after N-methoxymethylated nylon undergoes a crosslinking reaction due to the presence of an acid catalyst, its melting point increases and its heat resistance is significantly improved, and it does not suffer from interlining shifting or peeling due to reheating during press processing after cleaning. resolved. Moreover, the crosslinking has the advantage that the texture of the fibers does not become hard, it also imparts rubber elasticity and stretch back properties, and it also improves chemical resistance.

(Example) The present invention will be explained in more detail in the following examples.

Example 1 40 parts of powder of 6/66/6 12-based nylon copolymer hot melt adhesive (Diamide T-450AP1: manufactured by Daicel Chemical Industries, Ltd.) and 6/66/12-based nylon copolymer were added. 10 parts of N-methoxymethylated hot melt adhesive powder (Diamide Sodium polyacrylate was added and dissolved to prepare a paste with a viscosity of 15,000 cps. This paste was dot printed on a non-woven fabric and dried and fixed to produce a heat-sealed interlining.

Using this non-woven heat-fused interlining, the temperature of the press was 150℃.
It was thermally bonded to the outer fabric at a pressure of E1 kg/ci for about 30 seconds at ℃. 140 to 15 to further complete the crosslinking reaction.
It was heated at 0°C for about 5 minutes.

The obtained textile product does not lose its texture compared to the case where only Diamid T-450AP1 powder is used, and also has a texture of 15
The results of a heat peel test at 0°C for 10 minutes showed that the sample using only Diamid T-450AP1 powder was easily peeled off by hand, but the sample of this example containing Diaamide X-1874M powder did not peel off at all. There wasn't.

This proves that the crosslinking of the added N-methoxymethylated nylon extremely raised the melting point and turned it into partial heat curability, and the interlining misalignment was greatly improved.

Example 2 40 parts of powder of 6/66/6 12 type nylon copolymer hot melt adhesive (Diamide T-450API) and 6/66/12 type nylon copolymer were N-methoxymethylated to form a hot melt adhesive. agent (Diamide X-1874
10 parts of the powder of M) was suspended in 100 parts of water, and a thickener, sodium polyacrylate, was added and dissolved therein to obtain a viscosity of approximately 1.
A paste of 5,000 cps was prepared.

This paste was dot printed on a non-woven fabric and dried and fixed to produce a heat-sealed interlining.

Before thermally bonding the non-woven heat-fused interlining to the outer fabric, an aqueous solution of tartaric acid was evenly sprayed onto the surface of the interlining where the hot-melt adhesive dots were fixed, and then the temperature of the press was set at 150°C. It was thermally bonded to the outer fabric under the following conditions: , pressure 1/ai for about 30 seconds. Further, in order to complete the crosslinking reaction, the mixture was heated at about 150° C. for 10 minutes. This is 11t11f
! It is called JJ product A.

On the other hand, without spraying the tartaric acid aqueous solution, a piece was made that was heat-bonded with the outer material under the same conditions. This is called textile product B.

Assuming finishing heat pressing after cleaning, textile products A and B were heated in an oven at 150°C for 20 minutes, then immediately removed and peeled and astered by hand.
Product B was easily and completely peeled off, whereas textile product A was not peeled off at all.

Claims (1)

[Claims] A heat-sealable interlining made by fixing a hot-melt adhesive containing N-methoxymethylated nylon onto a fiber base material.