JPH06330468A - Method for water repellent processing of fabric - Google Patents

Abstract

PURPOSE:To provide a method for processing in which high water repellent performance and durability in washing are imparted to a textile fabric with a small amount of a resin. CONSTITUTION:The migration is caused in a drying step for water repellent processing and a water repellent resin is made to migrate to the surface of a textile fabric. Thereby, a resin film at a high water repellent resin concentration is formed to heat set the resin.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water repellent finishing method for imparting a high level of water repellent performance to a fiber cloth.

[0002]

2. Description of the Related Art In order to impart water repellency to a fiber cloth, a method in which a fluorine-based water repellent or a silicone water repellent and a cross-linking agent for improving durability are applied and heat treatment is generally performed. ing. According to this method, the bond between the fiber and the water repellent is strong due to the action of the cross-linking agent, but the strong bond and the water repellency often do not match. This is considered to be a phenomenon that occurs because the water-repellent resin film is not sufficiently formed on the surface of the fabric that is in direct contact with water. Therefore, in order to sufficiently form the water-repellent resin film, it is necessary to use more water-repellent resin by that amount, but in this case, it is not a good idea because the cost is increased accordingly.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is possible to form a sufficient water-repellent resin film on the surface of a fiber cloth with a small amount of water-repellent resin. The purpose is to obtain a water treatment method.

[0004]

SUMMARY OF THE INVENTION The present invention achieves the above object and has the following configuration. That is, according to the present invention, a resin liquid containing a water-repellent resin and a cross-linking agent is uniformly applied to a fiber cloth, and heating is performed from one side of the cloth in a drying step, thereby causing migration of the resin liquid and making the water-repellent resin into The gist is a water repellent finishing method of a cloth, which is characterized in that the cloth is transferred to the surface of the cloth and fixed with a resin.

The present invention will be described in detail below.

In the present invention, first, a resin dispersion containing a water repellent resin and a crosslinking agent is uniformly applied to the fiber cloth.

The term "fiber cloth" as used herein means polyester,
Synthetic fibers such as acrylic, nylon, aramid, polyclar and vinylon, and natural fibers such as cotton, rayon, hemp, wool and silk, or a woven fabric or knitted fabric obtained by blending, knitting or knitting. .

Examples of the water-repellent resin to be applied include silicone-based water-repellent agents and fluorine-based water-repellent agents, and organic fluorine-based water-repellent agents are particularly preferably used because they show good performance. The applied amount is 1.0 to 10 in terms of solid content with respect to the fiber cloth.
About 8.0% by weight is preferable.

As the cross-linking agent, ethyleneimine or a blocked isocyanate compound can be used.

In order to uniformly apply the dispersion containing the fluorine-based water repellent and the cross-linking agent to the cloth, the squeezing rate is appropriately adjusted using a mangle.

The fiber cloth to which the resin dispersion has been applied enters the drying step here. In the present invention, by heating from one side of the cloth in this drying step, migration of the resin liquid is caused and the water-repellent resin is transferred to the surface of the fiber cloth predominantly to fix the resin.

As a concrete method thereof, the surface of the cloth is rapidly dried by raising the cylinder dryer to a temperature higher than a normal temperature so that the surface of the cloth is directly brought into contact with the metal surface, so that the surface of the water repellent / water is removed. To promote the transition to.

The fiber cloth that has undergone the drying step is heat-treated to fix the resin. The heat treatment condition at this time is 1
It is preferably at 30 to 170 ° C. for about 1 to 5 minutes. This heat treatment greatly improves the water repellency and washing durability of the cloth.

The present invention has the above configuration.

[0015]

[Operation] When the water repellent resin dispersion is applied to the fiber cloth as in the method of the present invention and then directly contacted with the heating cylinder surface of the cylinder dryer, the contact surface of the cloth is rapidly dried,
A so-called migration phenomenon occurs, in which the dispersion liquid on the other side of the fabric migrates toward the dried side, a film with a high concentration of water repellent resin is formed on one side of the fabric, and a high level of water repellency is exhibited. Like

[0016]

EXAMPLES Next, the method of the present invention will be described in more detail by way of examples. The measurement of the performance of the cloth in the examples,
The evaluation was performed on unwashed items and washed with water (JIS L-
(Methods 0217 and 103) After 30 times, the following method was used. (1) Water repellency JIS L-1096 spray method

Example 1 Twill weave fabric with a 2/1 structure using a blended yarn 34s / 2 of 65% polyester / 35% cotton (115 warps / inch, weft 54)
Book / inch) and prepare the following prescription 1 using mangle.
It was impregnated with the water repellent dispersion liquid of, and squeezed with a pickup of 65%. Prescription 1 Eras Guard 180 70 g / liter (Daiichi Kogyo Seiyaku [Co.], fluorinated water repellent) Elastron BN-69 20 g / L (Daiichi Kogyo Seiyaku [Co.], blocked isocyanate)

Next, using a hot plate dryer, the surface temperature 1
Apply only 60 to one side of the cloth on the surface of the hot plate heated to 30 ℃.
Contacted for 2 seconds to dry. Then, using a tenter, 1
Heat treatment was carried out at 60 ° C. for 2 minutes to complete the fixation of the resin component.

For comparison with the present invention, a hot air dryer was used instead of the cylinder dryer in this example, and the temperature was 110 ° C.
A work cloth for comparison (Comparative Example 1) was obtained by the same method as in this example except that the cloth was dried for 90 seconds.

The performances of the present invention and the comparative work cloth were measured, and the results are also shown in Table 1.

[Table 1]

As is clear from Table 1, the fabric obtained by the method of the present invention has higher surface water repellency than the comparative example,
The result that the washing durability was excellent was obtained.

[0022]

According to the method of the present invention, it is possible to impart high water repellency and its washing durability to the surface of a fiber cloth with a small amount of resin.

Claims (1)

[Claims] 1. A resin liquid containing a water-repellent resin and a cross-linking agent is evenly applied to a fiber cloth, and then heated from one side of the cloth in a drying step to cause migration of the resin liquid, thereby making the water-repellent resin a fiber cloth. A water repellent finishing method for fabrics, which comprises fixing the resin onto the surface of the fabric.