JPS5928664B2 - Fabric processing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for processing fabrics having excellent water repellency and breathability.

Conventionally, for example, fabrics such as diaper covers have been coated with a water repellent agent on the fabric surface, which improves water resistance.
On the other hand, there were drawbacks such as the fabric having no air permeability, making it easy to get stuffy, and the fabric itself becoming stiff, making it extremely uncomfortable to wear.

The present invention solves the above-mentioned drawbacks and will be described below.

The drawing shows a part of a stockinette knitted fabric, and the same fabric 1 consists of knitted loops A and voids B, and C indicates yarn.

That is, in general, in order to obtain a fabric with good water repellency and breathability, it is required that the water resistance pressures of the knitted loops A and the voids B of the water-repellent fabric be approximately equal (balanced).

Therefore, in the case of a two-layer double-sided knitted fabric, it is preferable to use a bulky textured yarn made of multifilament synthetic fibers for the yarn C forming the knitting loop A as described above, and the water pressure resistance of each of the knitting loop A and the void part B is In order to maintain a balanced state, the fineness of the processed yarn should be 50 to 100 deniers and the number of multifilaments should be 20 to 40.
It is preferable that the crimp ratio is in the range of 12 to 30%.

Note that the processed yarn may be a multifilament & twisted single yarn or a drawn yarn.

Further, it is preferable that the cover factor (constant length type) of the fabric is 34 to 42, and the stitch length is 0.17 to 0.2.
9C1n is preferred.

Next, the double-sided double-sided knitted knitted fabric knitted with the processed yarn under conditions such as the required cover factor as described above is subjected to ordinary resin processing using a treatment solution using reactive organopolysiloxane and a fluorine-based water repellent. It is.

This will be explained below with reference to examples. <Example> Fineness is 75 denier, 36 filaments and crimp rate is 21
% of polyester processed yarn, the cover factor (
A two-tier double-sided stockinette fabric with a constant length of 37.8 and a stitch length of 0.23071 was knitted, and the fabric was treated as follows.

Treatment bath composition ■ Reactive organopolysiloxane (Toshiba Silicon TWS-831) 50 g/l ■ Fluorine water repellent 50 g/l (Sumitomo 3M Scotchgard) ■ Dibutyltin diacetate 10 g/l ■ Glacial acetic acid
The above double-sided knitted fabric was immersed in a solution of 5g/l and water was added to make a total volume of 1t, and after achieving a pick-up rate of 95%, it was heated at 100°C.
for 3 minutes and baked at 180° C. for 1 minute.

Table 1 shows a comparison between the fabric processed according to the present invention and the fabric processed using the conventional method, which were processed under the above conditions.

In addition, the control area is unprocessed cloth.

In the conventional method, the same fabric as in the example was coated with vinyl chloride resin, and cured after drying.

In addition, the air permeability in the evaluation method...USA standard L14.51.1968A
STM D-737-67 Frazier air permeability test water resistance...JISL1079-19766.31
．． 1.Water resistance and washability: 2g/2g of household detergent
Washing with a domestic washing machine for 5 minutes, rinsing, and drying was repeated 10 times.

As is clear from the above results, the method of the present invention has superior writeability and waterproofness compared to conventional methods, and can maintain its performance over a long period of time without deterioration in performance after washing.

That is, the present invention knits a knitted fabric having an optimal cover factor using a bulky textured yarn having a required fineness and fillatinte number, and further applies a water repellent treatment to the knitted fabric constituting the knitted fabric as described above. The water pressure resistance of the loop A and the void B are approximately equal, and by balancing them, a knitted fabric with excellent air permeability and water repellency can be obtained.

In the present invention, it is not preferable that the amount of the fluorine-based water repellent be less than 50% by weight compared to the reactive organopolysiloxane, since this reduces waterproofness and washing resistance.

As described above, the present invention uses a combination of a reactive organopolysiloxane and a fluorine-based water repellent to form a strong film of fully reacted silicon on the fiber surface, and also improves the water repellency of the fluorine-based water repellent. The synergistic effect of the two has made it possible to achieve unprecedented breathability and waterproofing.

Therefore, it can be used in a wide variety of diaper covers, raincoats, sportswear, raincoats, leisure wear, etc. that require such performance, regardless of the material or the weave structure.

Furthermore, the same function can be achieved even if the processing is performed at the yarn stage and then knitting or weaving is performed.

[Brief explanation of drawings]

The drawing is an explanatory diagram showing a part of a stockinette knitted fabric. A: loop, B: void, C:
... Thread.

Claims (1)

[Claims] 1 Fineness is 50-100 denier and number of filaments is 2
A two-stage double-sided stockinette fabric is knitted using bulky textured yarn with 0 to 40 threads and a crimp rate of 12 to 30%, and the cover factor of the fabric is set to 34 to 42.Then, the knitted fabric is knitted with reactive organopolymer. A fabric processing method characterized by applying ordinary resin processing using a treatment liquid using siloxane and a fluorine-based water repellent.