JPS6235837A - Implanted laminate for heat transfer - 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] (Industrial Application Field) □ The present invention relates to a flocked laminate for thermal transfer, which is adhered to clothes etc. by heating to cover and decorate the surface thereof, and is particularly excellent. The present invention relates to a flocked laminate for thermal transfer that provides transfer marks with elasticity (stretch back properties).

(Prior art) So-called appliqués have traditionally been applied to partially cover and decorate clothing or personal items, but in recent years, adhesive bonding has been used instead of sewing techniques. It has become. Flocked bodies are preferably used for such adhesive appliques because of their excellent decorative properties.

The flocked body is manufactured in the form of a 7e laminate by fixing short fiber flocked flocks to a release material via a temporary adhesive layer, and a hot melt adhesive to the entire surface or desired pattern surface.

When in use, the hot melt adhesive side of this flocked laminate is placed on top of the adherend such as clothing, and the hot melt adhesive is melted by heating with an iron or the like from the release material side. After that, the release material is peeled off and removed together with the temporary adhesive layer, thereby adhering the flocked body to the adherend. (For example,
-35619, Japanese Patent Publication No. 56-95699, etc.) (Problems to be solved by the invention) These conventional flocked laminates for thermal transfer can be used without problems with ordinary transfer cloths that have relatively low elasticity. However, in recent years, thermal transfer marks have been most frequently used for sports clothing, and the fibers themselves are highly stretchable, such as knits and spandex. This technique has the disadvantage that it cannot follow the elasticity of fibers, and particularly fine parts of the transferred marks are often cut.

As a result of intensive research to improve this drawback, the present inventors found that
For thermal transfer, a hot melt adhesive for flocked laminates containing N-methoxymethyl nylon is heated and crosslinked in the presence of an acid catalyst to create transfer marks with extremely high elasticity. The present invention was completed by discovering that a flocked V4 layered material could be obtained.

(Means for Solving the Problems) That is, the present invention involves planting short fiber flocks 3 on a release material surface 1 as shown in FIG. 1 via a temporary adhesive layer 2, and This flocked laminate for thermal transfer is characterized in that a hot-melt adhesive 4 containing N-methoxymethylated nylon is fixed to the entire surface or the surface of a desired pattern.

The N-methoxymethylated nylon used in the present invention is
Nylon 6.6, 6.6.10111.12.10.1
N-methoxymethylated nylon copolymer consisting of nylons such as 2.12.12 and combinations of two or more selected from these.

These N-methoxymethylated nylons can be produced by a known method, namely, by catalyzing nylon or nylon copolymer in a mixed solvent of alcohol and formaldehyde. There is a direct method in which the N-methoxymethylated product is recovered by heating and reacting in the presence of R-acid and then pouring the reaction solution into water with stirring, or in a mixed solution of alcohol and formaldehyde and formic acid. This can be carried out by a formic acid method, etc., in which dissolved nylon or nylon copolymer is reacted, and the reaction solution is added to water while stirring to recover the N-methoxymethylated product.

The methoxymethylation rate of the N-methoxymethylated nylon used in the present invention is 10 to 35%, preferably 15 to 35%.
25% is good. If it is less than 10%, the object of the present invention will not be achieved, and if it is more than 35%, not only will it be difficult to manufacture, but no excellent effects will be obtained.

Although N-methoxymethylated nylon can be used alone in the hot melt adhesive of the present invention, it can be blended with general hot melt adhesives such as other polyamide resins, ethylene-vinyl acetate copolymers, polyethylene ionomers, and polyesters. It can also be used as The blending ratio of N-methoxymethylated nylon must be at least 5% of the hot melt adhesive; if it is less than that, the effects of the present invention cannot be obtained.

To fix the hot melt adhesive to the flocked short fibers, either powder or pellet hot melt adhesive is sprinkled and fused, or fine powder hot melt adhesive is suspended in a medium such as water. This can be done by applying a slurry or a solution dissolved in a solvent such as alcohol or by applying it in spots and then drying it. Alternatively, a film-like hot melt adhesive may be attached and fixed.

Further, as shown in FIG. 2, a hot melt adhesive 4 containing N-methoxymethylated nylon is applied to the soil of the short fiber flocking group 3 to form an adhesive layer 5 stronger than the temporary adhesive layer 2. It can also be fixed onto the agent layer 5.

The flocked laminate for thermal transfer of the present invention is thermally transferred 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 significantly improving the elasticity of the transferred mark. It has characteristics that allow it to be used.

Acid catalysts used during thermal transfer include citric acid, itaconic acid, geltaric acid, adipic acid, azelaic acid, oxalic acid, succinic acid, glycolic acid, malonic acid, crotonic acid, lactic acid,
Examples include organic acids such as maleic acid and tartaric acid, and inorganic acids such as hypophosphorous acid. The amount of these acid catalysts used is preferably 1 to 5% based on the N-methoxymethylated nylon in the hot melt adhesive.

These acid catalysts can be sprayed or applied as an aqueous solution onto the hot melt adhesive layer or transfer fabric of the flocked laminate immediately before thermal transfer, or they can be preliminarily fixed to the flocked laminate together with the N-methoxymethylated nylon. You can also do that.

To pre-fix the acid catalyst to the flocked laminate, apply the powdered or finely granulated pressure-sensitive or heat-sensitive type microencapsulated acid catalyst to the short fiber flock together with hot melt adhesive in the form of a powder or pellet. It may be sprayed or adhered onto the flock, or a hot melt adhesive in the form of a slurry or solution to which these acid catalysts have been added may be applied onto the flock of short fibers and dried.

Thermal transfer is preferably carried out at a temperature of 120 to 180° C. for 10 seconds to 10 minutes and at a pressure of 0.1 to 1.0 9/7. This heating press melts the hot melt adhesive and bonds the flocked body and the transfer cloth, and at the same time, due to the presence of an acid catalyst, the N-methoxymethylated nylon in the hot melt adhesive causes a crosslinking reaction as shown in the following formula. , which imparts excellent rubber elasticity.

-(C82). -N-C- 10 01120CH3 -(CH2). -N-C--(CH2). -N-C- One CF12+CH30H No.-(CH2) n -N-C- If this crosslinking reaction is insufficient due to the thermal transfer conditions,
After thermal transfer, a post-heat treatment is performed at a temperature of 120 to 150° C. for about 5 to 10 minutes to complete the crosslinking reaction, thereby providing excellent elasticity.

(Effects of the Invention) The flocked laminate for thermal transfer of the present invention uses a hot melt adhesive containing N-methoxymethylated nylon and is thermally transferred in the presence of an acid catalyst to achieve fusion and bonding of N-methoxymethylated nylon. It causes a crosslinking reaction and imparts rubber elasticity to the hot melt adhesive layer, giving the transfer mark excellent elasticity. Further, the N-methoxymethylated nylon itself used in the hot melt adhesive of the present invention before thermal crosslinking has a low melting point and a low hot melt viscosity, so it has excellent low-temperature initial adhesion, a large anchoring effect, and high adhesive strength. On the other hand, since the melting point becomes high after the crosslinking reaction, even if the transfer mark is reheated to about 150° C. in a finishing press after cleaning, no displacement or peeling of the transfer mark will occur. Furthermore, it has the advantage that chemical resistance and solvent resistance are significantly improved by the crosslinking reaction.

(Example) The present invention will be explained in more detail with reference to Examples below, but the present invention is not limited thereto.

Example 1 6/66/6 N-methoxy 6/66/12 nylon copolymer was added to 80 parts of powder of 12 nylon copolymer hot melt adhesive (Diamide T-450AP2: manufactured by Daicel Chemical Industries, Ltd.). Methylated hot melt adhesive (Diamide X-1874M: manufactured by Daicel Chemical Industries, Ltd.)
20 parts of the powder were blended in a supermixer and fixed onto short wire #1 flock group 3 as hot melt adhesive 4 of the flocked laminate for thermal transfer shown in FIG.

Before press bonding the transfer mark to the knitted sports shirt, spray a concentrated aqueous solution of citric acid evenly onto the fixed hot melt adhesive 4 and heat it to a temperature of 150°C.
°C, pressure IN! 9/d for 1 minute for thermal transfer.

Thereafter, it was heated in an oven at 120° C. for 10 minutes to complete the crosslinking reaction. As a result of a test by stretching the mark part of the finished knitted sports shirt by hand, no mark breakage occurred at all, and it showed good elasticity that followed the elasticity of a knit shirt. A reheating test was also conducted at 150° C. for 10 minutes, but no peeling occurred.

On the other hand, Diamidony 450A was used for comparison.
In a similar test using P2 powder alone as a true melt adhesive, breakage of the transfer marks and peeling due to reheating were observed.

Example 2 32 parts of powder of 6/66/6 12-based nylon copolymer hot melt adhesive (Diamide T-450AP1: manufactured by Daicel Chemical Industries, Ltd.) and N-methoxymethyl of 6/66/12-based nylon copolymer Compound (Diamide X-187
4M (manufactured by Daicel Chemical Industries, Ltd.) was suspended in 60 parts of water, and 0.24 parts of citric acid catalyst and sodium polyacrylate as a thickener were added and dissolved to give a viscosity of 20
．． A paste of 0OOcps was prepared.

This paste is used as the hot melt adhesive 4 for the thermal transfer flocked laminate shown in FIG.
It was fixed on top.

Using this flocked viI material for heat transfer, it was applied to a knitted sports shirt at 150°C and a pressure of I Kg/cm for 2 minutes.
The marks were thermally transferred using a flat plate press. Thereafter, it was heated in an oven at 120° C. for 10 minutes to complete the crosslinking reaction.

As a result of testing by manually stretching the marked portion of the finished knitted sports shirt, the mark did not break and showed good elasticity that followed the elasticity of a knit shirt. Also 15
A reheating test was conducted in which the mark was heated in an oven at 0°C for 15 minutes and the mark was removed by hand immediately after being taken out, but no peeling occurred. This proves that mark displacement does not occur due to reheating during finishing after cleaning.

For comparison, we made a paste without adding the acid catalyst citric acid when preparing the paste and conducted similar tests, and found that the transfer marks were broken and peeled off due to reheating.

[Brief explanation of the drawing]

1 and 2 are cross-sectional views of representative examples of the flocked laminate for thermal transfer of the present invention. 1... Release material 2... Temporary adhesive 3... Short fiber flocking group 4... Hot melt adhesive 5... Adhesive Patent applicant Daicel-Hüls Ltd. Figure 2 Hot melt adhesive

Claims (1)

[Claims] A short fiber flocking group 3 is planted on the release material surface 1 via a temporary adhesive layer 2, and N is applied to the entire surface of the short fiber flocking group 3 or a desired pattern surface.
- A flocked laminate for thermal transfer, characterized in that it is formed by fixing a hot melt adhesive 4 containing methoxymethylated nylon.