JPS6231105B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is a manufacturing method for obtaining a tufted product by subjecting a napped product containing heat-shrinkable synthetic fibers and acrylic composite fibers to a tumbler (also known as a tumble dryer) treatment, followed by high-temperature dry heat treatment. It is related to.

Conventionally, as a method for obtaining a tufted article mainly composed of acrylic fibers, a method has been adopted in which the fabric is rubbed in a tumbler while applying heat and/or steam to entangle the fibers. For example, Tokuko Sho 42-8435
Alternatively, this method is disclosed in Japanese Patent Publication No. 42-24549. However, these methods require sufficient moisture and/or high temperature to sufficiently entangle the constituent acrylic fibers and require a long tumble dryer treatment. However, treatment with sufficient moisture or high temperature greatly reduces the Young's modulus of the acrylic fibers, resulting in a product with reduced bulge, making it difficult to balance both the formation of the tuft shape and the bulge of the product in a stable and reproducible manner. The current situation is that it is extremely difficult.

The present invention improves the shortcomings of such conventional methods and provides a manufacturing method that can stably form beautiful tufts of hair with good reproducibility using a streamlined process in a short period of time and with a small amount of heat while maintaining the product's fullness. This is what we provide.

The fibers used in the present invention must be specific heat-shrinkable synthetic fibers and acrylic composite fibers.

The heat-shrinkable synthetic fiber used in this product is, for example, an acrylic synthetic fiber that is second-stretched using, for example, a turbo stapler or parlock, and has a heat shrinkage rate of about 20% or more when steamed at 70°C. It is necessary to maintain the fullness and shape of the hair tuft. If dyeing is required, it may be dyed with hot water or steam at a temperature of 100°C or less before the secondary stretching process. In addition, the heat-shrinkable synthetic fiber has a maximum heat treatment temperature of 120℃ or more after tumble treatment, which is a finishing treatment effect of 5.
In order to maintain a low heat history, it is necessary that the heat shrinkage rate during finishing treatment at 120° C. or higher is 7% or more; if it is less than 7%, it will be difficult to obtain a tuft with a stable shape. The blending ratio of the fibers must be 25 to 40%; if it is less than 25%, the shape of the tuft will not be stable, and if it exceeds 40%, the tuft will not have fullness.

As the acrylic composite fiber, it is possible to use known fibers having the ability to develop crimps, which are obtained by composite spinning two or more types of acrylic polymers into side-by-side, random, sandwich, sheath-core, eccentric sheath-core, etc. Although there are no particular limitations, it is preferable to use wet-spun products with a cross section that is close to a perfect circle in terms of the feel of the product. The blending ratio must be 25 to 60%; if it is less than 25%, the product will have poor elasticity, and if it exceeds 60%, the product will have a rough and stiff texture.

In addition to the heat-shrinkable synthetic fibers and acrylic composite fibers, other acrylic fibers, polyester fibers, cellulose fibers, wool, etc. may be mixed as necessary, taking into consideration the texture and appearance of the product.

Two or more types of fibers mainly composed of such synthetic fibers are blended by a conventional method and spun as necessary to create a pile product using a high pile machine or tufting machine, and split, raised or brushed if necessary. The hair is sheared.

The raised fabric thus obtained is treated using a tumbler at a temperature of 70 to 100°C, which is the temperature required to cause shrinkage due to secondary stretching. A dry heat treatment atmosphere is preferable, but some water vapor may be added to help the heat recovery (shrinkage) of the second drawn heat-shrinkable fibers, but water vapor may hinder the formation of bulky tufts. It is preferable to supply as little as possible. Processing time is 20 ~ less than half of the conventional method
30 minutes is sufficient. Through this tumble treatment, the acrylic composite fibers are crimped and the fuzz is concentrated, giving it a brush-like appearance, but the tuft shape is not yet complete.

Next, the tumbled fabric is treated on a flat surface for 5 to 10 minutes in an atmosphere of 120° C. or higher. The brush-like appearance of the tumbled hair tufts is due to the combination of an increase in shrinkage of the heat-shrinkable fibers by 7% or more and an increase in crimp of the acrylic composite fibers due to the shrinkage of the fibers, resulting in a good tuft shape. Complete. Such processing usually includes a step of applying a glue material to the back side of the fabric and drying it, so in this case there is no need to add one additional step, and it is necessary for the heat-shrinkable fiber to shrink by 7% or more. Another feature of the present invention is that it is possible to achieve the two purposes of drying and heat shrinkage in one step by processing in an atmosphere of 120° C. or higher using a pin tenter or the like.

As can be easily understood from the foregoing, this invention allows for short tumble processing time, no delicate adjustment of water vapor or water content, and a stable and reproducible bulky tufted product. Obtained through a streamlined process.

The present invention will be specifically explained below using examples.
Ratios are expressed as weight percentages.

Example The following fibers A, B and C were selected and blended and passed through a card to create a 11G/M sliver.

A fiber K6 3 denier x 40 mm 20% B fiber C8 3 denier x 40 mm 50% C fiber heat-shrinkable acrylic fiber 30% A fiber K6 3 denier x 40 mm is a single component acrylic fiber made by Japan Exlan Kogyo (when heated at 70℃) Thermal shrinkage rate: 0%) was used to soften the texture of the product.

B fiber C8 3 denier x 40MM is a side-by-side type acrylic composite fiber made by Nippon EXLAN Kogyo (number of crimps: 15/25mm, degree of crimp: 28%), which maintains the elasticity of the product and is beautiful. It is essential for forming the hair tuft shape and has a substantially perfect circular cross section.

C fiber was produced as follows. acrylonitrile
A fiber bundle (tow) with a single fiber denier of 2.5 denier and a total denier of 650,000 denier is produced by a conventional method from a 46% aqueous solution of acrylonitrile copolymer consisting of 84.7% methyl acrylate, 15.0% methyl acrylate, and 0.3% sodium methallylsulfonate. was produced by wet spinning. The tow was stretched using a turbo stapler and cut to a fixed length of 40 mm using a cutter without passing through the breaker zone. The fibers shrink by 27% by steaming at 70°C, and then
Dry heat treatment at 140°C resulted in further shrinkage of 12%.

Next, the sliver is fed to a Wildman sliver knitting machine, and the ground yarn is made of rayon yarn 20/20/
A raised product with a basis weight of 600G/M ² was knitted using 1S 2-strand alignment. Next, the pile length was trimmed to 25 mm, and then tumbled at 80° C. for 20 minutes, resulting in a fabric in which the raised naps were partially aggregated in the shape of a brush tip.

Next, a glue material was applied to the back side of the fabric, and the fabric was passed through a pin tenter for 7 minutes for drying, width removal, and wrinkle removal. The processing temperature at this time is 140°C.

The thus obtained hair tuft-like product had beautifully arranged hair tufts, was rich in elasticity and fullness, and had good reproducibility.

Claims (1)

[Claims] 1 25-40% secondary drawn heat-shrinkable synthetic fibers and 25-60% acrylic composite fibers with a heat shrinkage rate of 20% or more when steamed at 70°C and a heat shrinkage rate of 7% or more during finishing treatment A method for producing a tufted product, which comprises tumble-processing a fabric obtained by shearing a napped product containing % of the nape at 70 to 100°C, and then finishing it at 120°C or higher.