JPS5928665B2 - 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 air permeability, it is required that the water resistance pressure of each of the voids B and the knitted loop of the water-repellent fabric be approximately equal (balanced).

Therefore, in the case of a three-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 must be between 100 and 180.
It is preferable that the denier and multifilament number is 60 to 90, and the crimp rate is in the range of 25 to 50%.

In addition, the above-mentioned processed yarn is a single yarn made of multifilament or
It may also be a drawn thread.

Further, it is preferable that the cover factor (constant length type) of the fabric is 35 to 44, and the stitch length is 0.22 to 0.3.
8cn1 is preferred.

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

This will be explained below with reference to examples. <Example> Fineness is 150 denier, 72 filament, crimp rate is 4
A three-tier double-sided knitted fabric with a cover factor (constant length type) of 38.2 and a stitch length of 0°32 cm was knitted using 0% polyester processed yarn, 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-1-10 g/l ■ Glacial acetic acid
The above double-sided stockinette fabric was immersed in a solution of 5g/l with water added to make the total volume lt, and the pick-up rate was 95%, then lOO℃.
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
．． 1Water resistance Washing resistance is... household detergent (Ubeads) 2g/l
Washing and rinsing for 5 minutes in a household washing machine and then drying were 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 uses a bulky textured yarn having a required fineness and number of filaments to knit a knitted fabric having an optimal cover factor, and further applies 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 range 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 the drawing]

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

Claims (1)

[Claims] 1 A three-layer double-sided knitted fabric is knitted using bulky textured yarn with a fineness of 100 to 180 deniers, a number of filaments of 60 to 90, and a crimp rate of 25 to 50%, and the cover factor of the fabric is 35 to 44. and then subjecting the same knitted fabric to a conventional resin treatment using a treatment solution containing reactive organopolysiloxane and a fluorine-based water repellent.