JPS5870773A - Special processing 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 The present invention provides a permanent breathable waterproofing method for knitted fabrics that has excellent breathability and waterproofness and has a good feel.

Recently, various processing methods have been developed to impart contradictory properties such as breathability and waterproofness to knitted fabrics. For example, the fabric is coated with a resin coating on the surface of the fabric, or immersed in a single treatment bath using various types of silicone thread water-reducing agents, such as emulsion type or solvent treatment type. However, the former method has the disadvantage that the first stitch or weave is blocked by resin, resulting in a fabric that is not breathable and tends to get stuffy, and the fabric itself becomes stiff, giving it a rough and stiff texture. The latter, flKK, had poor waterproof performance and insufficient washing and dry cleaning durability.

The present invention solves the above-mentioned drawbacks, and is an improvement to the invention of Japanese Patent Application No. 1983-91135 previously filed by the present applicant. (Mixed knitting, blended spinning, mixed twisting, alignment, etc.)
VL knitted fabrics, especially knitted fabrics made of various structures made of synthetic fibers such as polyamide and polyester, have excellent breathability and waterproofness, long-lasting texture,
This provides a permanent finishing method with good gloss.

However, the feature of the present invention is that in the presence of an inorganic or organic metal salt catalyst and an acid, a reactive organo-accumulated siloxane and a fluorine thread water removal agent are mixed in a weight ratio of the latter to the former at t-sos or more. In the treatment bath, the object to be treated is immersed and then subjected to heat treatment such as drying and curing, so that the reaction is completed on the surface of the object. The treatment agent is densified by forming a mixed film of silokidene and a 7-strand water repellent, and then calendering the treated object after the treatment.

Smoothing and molecular reformulation, which improves texture and gloss, especially softening and polishing according to your preference,
This is a permanent breathable and waterproof finish that has excellent breathability and waterproofness, as well as excellent washing and abrasion resistance.

The present invention will be explained in detail below.

First, the processing agent constituting the processing bath used in the present invention will be explained.

1. As the anti-6ffi organopolysiloxane, for example, use the one shown in JP-A-58-70773 (2). Copolymer type: 161 Hydroxy-modified type (6) Vinyl-modified type (where m-n are all positive integers) are used individually or in combination.

λ As a fluorine thread water retardant, Use a water repellent mainly made of Tsuruo a carbon.

! As a reaction catalyst for anti-6 type organopolysiloxane, the following inorganic or organic metal salts are used.

Inorganic metal salts: pot, zirconium, zinc, iron,
Hydrochlorides, nitrates, sulfates, etc. of lead, etc. O Organic metal salts: dibutyltin diacetate, zinc octylate, dibutyltin silafrate, tin octylate.

Using butyl titanate etc. 4. Bath reaction accelerator.

Inorganic/organic acids such as hydrochloric acid, sulfuric acid, phosphoric acid, acetic acid, formic acid, etc. are used.Next, as the object (cloth) to be processed in the present invention, as mentioned above, polyester and polyamide based synthesis are used in rc@. It is best to weave multifilament or spun fibers, and the weave structure should be like a plain weave (the weave structure is uniform, and the pores between the threads are small and the fibers are woven. Also, knitted fabrics are preferable. In some cases, 2-tier or 3-tier views can be used.The fineness of the thread, the dense charcoal, the number of filaments, the basis weight, the weaving structure, etc. should be selected depending on the intended use. .

The present invention involves immersing the object to be treated (cloth) in a treatment solution consisting of the above components, and pulling out 7 tons at a desired pick-up rate.
ll, pre-drying, baking and other heat treatments. Next, the object to be processed is calendered. This calendar processing (finishing).

Depending on the intended use, temperature, pressure, reaction speed, roll opening speed, roller material and hardness, number of rolls, etc. are selected or adjusted, such as universal calendar, Shriner calendar, Moiré calendar. The texture and luster of Fr violet can be obtained by methods such as , tension calendering, and felt calendering. Note that the treatment temperature is preferably in the range of 1150 to 200°C. Also, there is a ninth step to prevent the misalignment caused by the calendering process.

It is possible to appropriately use a known anti-slip agent in the treatment bath or to perform it as a pretreatment. In the present invention, it is not preferable for the amount of the fluorine water repellent to be less than 50% of the anti-F)ffi polysilaxane in terms of weight ratio, since waterproofness and washing resistance will decrease.

Examples of the present invention will be listed below, and the following evaluation results will be shown in comparison with comparative examples. <Example 1> Base fabric used (material to be treated) Nylon taffeta 70d Hammered wood & 117 x 100 pieces Treatment liquid Treatment Above liquid After 2 dip-2n dip immersion a-lar drawing with a pick-up rate of 80 to 100 seconds and 1 minute jump drying at 110°C and anti-slip treatment, the material was treated in the same way with liquid ①. and after drying 17
Cure at 0°C for 1 minute.

Calendar treatment 9 Using a page/f-calender, temperature 170°C, pressure 1
The calendering speed of the paper roll was set to t-2 times under the condition of 00 instant/d, and the calendering was repeated twice.

<Example 2> Base fabric used (material to be treated) Tetron 75d x 75d (weft coolie), 117 x 100 pieces of wooden strands to be treated.Liquid treatment 2dlp-2nip immersion roller squeezing tube was carried out using the above liquid, and at that time the picker had a rate of 1 tube. taO~10016,
Dry at 110°C for 2 minutes and then cure at 170°C for 90 seconds.

Calendar treatment ilO Using a cotton calendar, temperature 190℃EE cuff 5
(Iku/a+f7), the calendering speed of the cotton roll was set to 1.5 times that of the cast iron roll, and the material was passed twice.

<Example 3> 41! Base fabric (material to be treated) Tetron spun yarn 605/ix 60 ” 1 hammered wood &
190 books 11. Liquid reactive silicone epoxy Sts liquid (modified type) Catalyst (dibutyl pot diacetate) 1s Fluorine resin 6 Naruhyo Acetic acid Acid 0.5s Sealing agent (
Hi-Resin TY 50 (manufactured by Takamatsu Yushi) 4% Treatment: 2dfi) -2 nip mill immersion roller was applied to the striking part, with a pick-up rate of 80 to 100 seconds.
Dry at 110°C for 2 minutes, and then cure at 170°C for 90 seconds in room 11.

Using three calendar rolls, the material was passed through at a reaction speed of 25 m/ml at a temperature of 170°C and a pressure of 100°C. I S-L-10032 Water Resistance J
IS-L-1092 (1977 Law A) 3 Water Repellency J
IS-L-10924 Moisture Permeability J IS-ni-6
528. Evaporation area 21.2 cII, 100-beaker [70 mJ of room temperature water (21°C).

Moisture permeability (ml/
sL/H) = Arrangement A: Average amount of decrease per hour (mf) B: Moisture permeable area of test piece (-) It is clear from the evaluation results of the above-mentioned Examples and Comparative Examples that the invention has achieved a method of permanently processing a woven fabric with excellent breathability and waterproofness, and a good feel. That is, when observed with a scanning electron microscope (X!100x), the resin that was treated with the treatment bath having the specific components and composition of the present invention and formed on the object to be treated was found to have a ±wall coating on the fibers. It is attached to the surface.

When this is calendered, the resin penetrates into the nm* of the fibers, forming a sticky film and completely covering the surfaces of the fibers. It also gets into the diameter and between the wefts of the woven structure, almost completely filling the holes. What's more, the high-temperature-treated film has great strength and strong adhesion to fibers.It has excellent breathability and waterproofness, making it suitable for washing and dry cleaning. Furthermore, the texture and gloss are significantly improved. In addition, in order to obtain the desired texture and gloss.

By appropriately combining various conditions, it is possible to obtain a breathable and waterproof fabric with a wide variety of properties.

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Claims (1)

[Claims] 1. Mixing of the reaction layer organopolysiloxane and the fluorine-based water repellent in the presence of an inorganic or organic metal salt catalyst and an acid such that the weight ratio of the latter to the former is 50 or more. After using one treatment bath, the object to be treated was immersed in the treatment bath. A special processing method for knitted fabrics, which is characterized in that the material is then subjected to heat treatment, and then calender processing is applied to the object to be treated.