JPS6163776A - Treatment of knitted fabric - 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 treatment method for improving the heat retention, windproof and anti-build properties of knitted fabrics made of fibers with a single yarn fineness of more than 0.5 denier. It is something.

(Prior Art) Natural feathers are the most typical conventional heat-retaining material, but they have the drawbacks of being expensive and difficult to care for. Moreover, as clothing, it is used with padding, which makes it very thick, and although it has excellent heat retention, it is difficult to move around in, making it unsuitable for sports.

On the other hand, regarding windproof properties, there are some knitted fabrics with a coating film formed on the surface, but by forming a film on the surface, the surface touch of the LA fabric disappears, and the coated resin becomes cold to the touch and crispy. Clothes 1'+1
It becomes undesirable. For this reason, the current problem is that even if the surface touch is improved by providing a lining or using three layers (tomu-zukuri), the crispness remains and the cost increases.

Various studies have been made to solve these drawbacks. For example, in 1749, a method was proposed in which a polyurethane elastic material containing a foaming substance was attached to the knitted fabric structure using extremely all fibers as the napped part. The surface becomes raised, and since it uses separable fibers, pilling and blistering occur during wear, which impairs the appearance of the knitted fabric.

[Problems to be solved by the present invention]

The present invention not only provides excellent heat retention and windproof properties, but also
To provide a base fabric that does not cause pilling or flopping during wear and has a soft texture suitable for sports clothing.

[Means for solving problems]

A method for treating a knitted fabric, which comprises applying a resin to a knitted fabric made of fibers having a single yarn fineness of more than 0.5 denier, and subsequently performing fluid treatment to fill voids in the knitted fabric with the resin.

The present invention will be explained in detail below.

Fibers applicable to the present invention include synthetic fibers such as polyester, polyamide, polyacrylic, polypropylene, polyvinyl alcohol, and polyurethane, and modified fibers thereof, semi-synthetic fibers such as diacetate and triacetate, rayon, cupra, etc. Examples include recycled fibers, natural fibers such as wool, cotton, and hemp.

It is necessary that the single yarn fineness of the four-piece miscellaneous yarn exceeds 0.5 denier. Unless the fibers are thick and have a single yarn fineness of more than 0.5 denier, the fibers will become flat and only a paper-like product will be obtained. Fibers with a single yarn fineness of more than 0.5 denier were selected because they have high heat retention and windproof properties, and are also effective in preventing pilling and blistering, as well as retaining fiber properties against fluid treatment, which will be described later. be done.

These II miscellaneous fibers include composite fibers made of different or similar polymers 7'f, crimped fibers, irregular cross-section fibers, hollow fibers,
False-twisted fibers, fibers to which mulberry agent has been added or treated, etc. are preferably used. The fibers used include filament yarns made of short fibers, covered yarns, strongly twisted yarns, and combinations thereof.

Next, the knitted fabric applied to the present invention is satin tricot t-
g, rubber knit, half tricot 1 knit, pile knit, and plain knit, and the woven fabrics include plain weave, twill weave, satin weave, and even 2
Examples include, but are not limited to, heavy velvet, double-sided velvet, and chinchilla weave.

These knitted fabrics are effective for fabrics having voids in the stitches or weaves, and those having napped fabrics on one or both sides, such as napped knitted fabrics or velvet fabrics, which are napped, puffed, or loop-fed and then silled, are preferred according to the present invention. make the effect even greater.

A resin is attached to the knitted fabric as described above. This resin improves the heat retention and windproof properties of knitted fabrics, and the more flexible and low the specific gravity, the better. A resin or a resin that forms bubbles after application exhibits the present invention even more effectively. Resin refers to natural resin, thermoplastic or thermosetting resin, and specific examples include phenolic resin,
Cresol resin, xylene resin, urea resin, melamine resin, alkyd resin, furan resin, unsaturated polyester, silicon resin, celluloid, cellulose acetate, vinyl acetate, vinyl chloride, vinylidene chloride, polygonyl acetal, methacrylic resin, nylon, polyethylene , polystyrene, polypropylene, polyurethane, fluororesin,
polycarbonate, polyether, saturated polyester,
Examples include polyisobutylene, natural rubber, synthetic rubber, and derivatives and modified products thereof.

Among these, foamed or porous resins that are flexible and have excellent stretchability are preferred. Such a resin is impregnated or applied to the knitted fabric to make it adhere. Coating refers to forming a continuous or discontinuous film on the surface of the knitted fabric, and may also be a combination of impregnation and coating.

The knitted fabric coated with resin in this manner is subsequently subjected to fluid treatment.

Fluid treatment involves colliding liquids, gases, powders, etc. onto the surface and even inside of knitted fabrics.

That is, the resin attached to the knitted fabric is filled into the voids of the stitches or weaves of the knitted fabric by fluid treatment. In the case of a knitted fabric using napped or short fibers, a part of the resin and the nap or IIt are filled into the voids of the stitches or weaves by fluid treatment, and the effects of the present invention are further exhibited.

For fluid treatment, liquids are preferred in terms of workability, cost, collision energy, efficiency, etc., and water is particularly preferred. Other components such as solvents, carriers, alkalis, acids, dyes, resins, smoothing agents, softeners, etc. are mixed in water, such as aqueous solutions, dispersions, emulsions, etc., and crosslinking to further harden the resin. including solutions of agents and reactants.

As for the fluid treatment using powder, it is also possible to use metal powder, finely pulverized resin, a foaming agent, etc., and to embed other powder into the knitted fabric to which the resin is attached. If metal powder is used, a heat retention effect using radiation can be obtained, and if the finely pulverized resin is soluble, it can be removed in a subsequent process to create pores inside the knitted fabric.

As a specific fluid treatment method of the present invention, the pressure is 10
~3001q/ci1; 11) Preferably 20~1
00 kl/c/. If the pressure is low, the nap may not be fully submerged inside the 17Q fabric, or even if it is submerged, it will be exposed to the surface during subsequent washing, resulting in a lack of durability. If the pressure is too high, the texture will become hard and impractical. The diameter of the injection nozzle is 50 to 700μ, preferably 1
The nozzles are arranged in the width direction of the fabric to be treated, and the treatment liquid is sprayed under such pressure. Further, the injection time and number of times can be arbitrarily selected. In order to reduce the voids in the knitted fabric and improve its heat retention and windproof properties by using resin or resin and some fibers, it is preferable to process the fabric multiple times or for a long time. It is preferable to vary the speed. In addition, the fluid treatment temperature varies from room temperature to 100% depending on the characteristics of the fabric.
Any temperature up to °C is applicable.

It is preferable to process the knitted fabric continuously by placing it on an effective mesh wire gauze or the like and moving it using a conveyor belt or the like. Edit the nozzle! It is possible to increase the effect by moving the force by 1z in the length direction or width direction. Also, it is better to perform fluid treatment on both sides rather than on one side.
In the case of both sides, it is more preferable to repeatedly process the front and back sides of the 8 fabrics while alternately lowering the nozzle pressure.

The fluid treatment can be carried out after the resin has been applied or after the surface of the knitted fabric has been raised and the resin has been applied, or it can be carried out at any time during the dyeing and finishing process as long as this is satisfied.

In order to make the texture softer, it is also possible to apply a softener after the fluid treatment, to perform a rubbing treatment, or to perform jet dyeing.

〔Example〕

Example 1 A 75-denier, 36-filament undrawn polyester yarn and a 150-denier, 72-filament cationic dyeable undrawn polyester yarn were air-entangled, stretched, and false-twisted in both the warp and the weft, and 32 warp yarns/ A plain woven fabric with a fabric weight of 300 Q/m2 was obtained using 28 wefts/inch. After scouring, drying, and intermediate setting, this was dyed and finished.

Then, each side was cut and raised 15 times using 1 piece of No. 11 cloth. Next, DM made of 6% polyurethane
The raised knitted fabric was impregnated with F solution and wet-coagulated to adhere porous urethane. Thereafter, fluid treatment was performed under the following conditions.

Nozzle diameter: Q, 13nwnφ Nozzle spacing: 0.6mm Nozzle swing: 5 times/sec with amplitude 1.2nvn in the width direction Nozzle pressure 9/cmf → 50kLJ/QTF on two surfaces 90
The heat retention properties, windproof properties, building resistance properties, and surface touch of this product were good as shown in Table 1.

Comparative Example 1 As shown in Table 1, the product of Example 1 that had been dyed and finished had a good surface touch, but had poor heat retention, windproof properties, and building resistance, and had low value as a heat retention and windproof material. Ta.

Comparative Example 2 The cut and raised product in Example 1 had good texture, surface touch, and heat retention, but had poor windproof properties, especially building resistance because it was a raised product.

Comparative Example 3 The product of Example 1 with porous urethane attached has good properties, but since urethane is attached to the surface of the 1% JFJ product, it has a poor touch and is white, with poor appearance. It was something.

Table 1 Note 1) Heat retention rate Based on JIS L-1096A method.

However, if the outside temperature is 25℃ 2) Air permeability Based on JIS L1079.

The lower the air permeability value, the better the wind protection. 3) Pilling Based on JIS 1076 method A The higher the value, the better the pill resistance.

4) Surface touch Determination of surface touch by touch Example 2 A spun yarn made of atmospheric pressure cation dyeable polyester stable with a 2 denier and a cut length of 76 mm was used for warp and weft yarns, and a warp yarn of 42 mm was woven. book/inch, weft 40
A twill fabric with a fabric weight of 150Q/TI+'' in terms of threads/inch is 15. This is cut and raised with a needle cloth raising cloth, and then the particle size is 10~10 with a shell wall made of vinylidene chloride copolymer and containing low boiling point hydrocarbons. The fabric was impregnated with a polyurethane emulsion containing 6% of a 20μ foamable material, and 4% by weight of polyurethane was applied to the fabric, dried and heat treated.Fluid treatment was carried out under the following conditions.

Nozzle diameter: 0.25 φ Nozzle spacing: 2.5mm Nozzle pressure: 9/atf on back side 120 → front side 701/d
→ Back side 50kl/Ci Then, dyeing was performed using a jet dyeing machine, and then finishing processing was performed.

The resulting product has a heat retention rate of 20% and an air permeability of 9cc10f/
It was excellent with sea and pilling grade 4.

[Effects of the Invention] The present invention provides a material that has excellent heat retention, windproof, anti-pilling, and anti-squeezing properties, and has a soft texture. The present invention is suitable as a material for sportswear.

Claims (1)

[Claims] A method for treating a knitted fabric, characterized in that a resin is attached to a knitted fabric made of fibers having a single yarn fineness of more than 0.5 denier, and then fluid treatment is performed to fill the voids of the knitted fabric with the resin. .