JPS60246868A - Water repellent processing - 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] (1) Industrial application field The present invention relates to a water repellent finishing method.

(2) Conventional technology Traditionally, woven and knitted fabrics have water and oil repellency.

A method of coating a fiber surface with a heptadium polymer for the purpose of imparting functionality such as antifouling properties is well known.

Specifically, a method in which a solvent solution or aqueous emulsion of a fluorine-containing polymer is applied to a woven or knitted fabric, and a film of the fluorine-containing polymer is formed on the surface of the fiber by heating treatment as necessary after drying. is common.

However, even with this excellent performance, there is a significant decrease in water and oil repellency when wearing on children, and in order to bring out this performance again, conventional methods such as ironing and heat pressing have been used. Heat treatment was essential.

This is due to a structural problem with the fluorine thread water and oil repellent, and rearrangement of the fluorofurkyl groups or fluorofurkyl groups is required to fully develop water and oil repellency. However, for consumers who actually use water- and oil-repellent textiles, ironing them after washing is a hassle.

Items with complex shapes may be difficult to iron (for example, clothing made of pile fabric with piles on the surface), and some items, such as diaper covers, are not normally ironed. The development of a water and oil repellent treatment method that does not require ironing is awaited.

, (3) Purpose of the Invention The purpose of the present invention is to solve the conventional problems and to provide a washing-durable product that has good water repellency without the need for heat treatment such as ironing or heat pressing after washing. The purpose is to propose a water-repellent finishing method.

(4) Structure of the invention The present invention comprises a fluorine-based water/oil repellent and the following (2) and (
B) A water repellent finishing method characterized by treating a synthetic fiber loom article with a treatment liquid containing a compound represented by: Group) Melamine resin represented by the formula (6) In the general formula, R1-R, each independently.

He -OH, O('flH2B + 1 q -CH
20CnH1B+1 j-CH, OH, -CHlCH OH-CHtCm, CH, DH-, where Kn represents a positive integer, particularly an integer from 1 to 16.

The fiber fabric used in the method of the present invention includes polyester,
Synthetic fibers made of polyamide, polyacrylate and modified polymers thereof, and natural fibers such as cotton, linen, wool, and silk.

Examples include AIIF & fabrics, nonwoven fabrics, pile fabrics, etc. made of recycled fibers and semi-synthetic fibers such as rayon, cupro, and acetate alone or in combination.

In addition, the amount of finishing agent used is 0.5% owf to 2-owf for the fluorine-based water and oil repellent, and 0.02 fb for the ethyleneimine compound.
owf ~0.2%owf + 0.05 for melamine resin
A desirable example is - to 1% owf. If the amount of each used is less than this, the durability of the water repellent effect will be poor, and if it is more than this, problems such as a hard texture will occur, which is not preferable.

Further, the ethyleneimine compound preferably contains two or more of the functional groups, such as the following.

Further, preferred examples of melamine-based compounds include polymers of the following compounds.

R3-R6: H+ '-OCn1t Hen5 + 1 (na"
1~16)-CH@0Cns + Hxn4+ 1
(ru = 1~16) CHxOHs CHtCH
*01(+C0NHt +-coshu CM, OH,-
〇÷x−o9H(X = CJL t C5Hs r
CJn* = 1 to 1500) In addition to those represented by the above general formula, examples of the above compounds include ethylene urea cocondensation compounds, dimethytoururea cocondensation compounds, dimethyp-ruthiourea cocondensation compounds, and acid colloid compounds.

The method for applying these processing agents is the absorption method.

Any method such as a band method, coating method, or spray method may be employed. After application, it is dried and heat treated at a temperature of 100°C or higher, usually at 150 to 190°C for 1 to 3 minutes.

(51 Effect of the Invention) The water repellency of woven and knitted fabrics that are treated with a fluorine water and oil repellent is reduced by washing when washed. This is thought to be due to disordered arrangement.In order to prevent such disordered arrangement of fluorofurkyl groups or fluoroalkylkenyl groups due to washing,
The coating of fluorine-based water and oil repellents is strengthened using ethyleneimine compounds.

However, although it is true that ethyleneimine-based compounds alone provide good water repellency for up to 113 washes, further repeated washings result in a decrease in water repellency, and washing durability is not necessarily sufficient. I can't say it enough.

In the method of the present invention, the durability is dramatically improved by using a melamine compound in addition to a fluorine water/oil repellent and an ethyleneimine compound. That is, in the method of the present invention, the fluorine-based water and oil repellent is crosslinked with an ethyleneimine compound and a melamine resin, so that the fluorine-based water and oil repellent polymer is maintained in an extremely strong structure. Although it is thought that the purpose is to prevent the arrangement of fluoroalkyl groups or fluoroalkylkenyl groups from being disturbed by washing (Example 1), filament yarns made of polyethylene terephthalate (
75de/36f + S twist 300T/M) was used for the warp and weft, woven into a plain tuck fabric, and the temperature was 70℃.
After scouring and relaxing for 20 minutes at a temperature of 180°C, and setting the temperature for 1 minute at a temperature of 180°C, high-temperature dyeing was performed at a temperature of 130°C for 45 minutes using a 1-bath reducing agent (Bisnol P70).
Reduction cleaning was performed using 9/1 at a temperature of 80° C. for 20 minutes.

The resulting fabric was coated with various formulations (Arashi 1 to 14) shown in Table 1.
) After applying water repellent treatment from LC and drying, the temperature is 170℃.
The fabric was finished by heat setting for 1 minute. Table 1 shows the water repellency of the fabrics obtained. The obtained woven fabric (Example) exhibited excellent and durable water repellent performance compared to the conventional method (Comparative Example).

(Example 2) Nipun filament yarn (70de/34f) was used as warp,
It is used for the weft, woven into taffeta fabric, scoured and relaxed, preheat set, and dyed to give the formulation shown in Table 1 (Good 5 to
No. 6), water repellent treatment is applied, and after drying, temperature 1
The fabric was finished by heat setting at 70°C for 1 minute.

Table 1 shows the water repellency of the obtained fabric.

The examples showed excellent and durable water repellency.

However, the treatment liquid was applied at a pick up of 40%. The water repellency evaluation described above is based on JIS L 1092.
5.2 Water repellency (spray test).

Also, for washing, I decided to use a household washing machine and use Super Zabu (Kao Stone 11) as a detergent, repeating the following steps a predetermined number of times.

Patent applicant Teijin Ltd. 1) Hiroshi Jun

Claims (1)

[Scope of Claims] 1. Fluorine-based water/oil repellent and the following (a) and (b)
A water-repellent finishing method characterized by treating a synthetic fiber woven or knitted fabric with a treatment liquid containing a compound represented by: (4) General formula (R is hydrogen or methyl group) (6) General formula In the formula, R and -Ro are each independently -H. 'OH+ -0CyJ(tn+1 + CH20CnH
1n+ 1 +-CH,OH, -CH2CH,OH,-
C) f, CH, CH, OH. where Kn represents a positive integer, particularly an integer from 1 to 16.