JPS6036512B2 - Water repellent finishing method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for durable water-repellent processing of a fabric containing 50% or more of synthetic fibers.

Traditionally, twill processing of cloth belts involves applying an emulsion or solvent solution of water repellents such as fluorine-based or silicon-based agents, drying, and
It is well known that this can be achieved by heat treatment.

However, in the case of twilled fabric strips coated with ordinary emulsion-based water repellents, although the initial water repellency performance is good, the deterioration of the water repellency performance due to washing is relatively large.

In particular, with commonly used emulsion-based fluorine-based water repellents, when air-dried after washing, the water repellent performance decreases, and heat treatment such as ironing is necessary to restore the water performance. There are strong demands for improvement from the public. Furthermore, in the water repellent processing method of applying a solvent-based water repellent, the initial water repellency is generally slightly poorer than that of an emulsion-based water repellent, and the durability is often insufficient.

The present invention was achieved by researching a method of manufacturing a cloth hanger with good durability and water repellency by improving the drawbacks of the conventional method.

That is, in the present invention, the first step is to apply an emulsion containing a fluorine-based water repellent to a fabric containing 50% or more of synthetic fibers, dry it, and if necessary heat treat it, and then apply a silicone-like water agent alone or a fluorine-based water repellent. This is a durable machine water processing method characterized by comprising a second step of applying a solvent solution containing a mixture with a water agent, drying, and heat-treating.

The method of the present invention will be explained in more detail below.

The synthetic fibers used in the method of the present invention are polyester-based, polyamide-based, polyacrylic-based fibers, and the like. Further, the reason why a cloth containing 50% or more of synthetic fibers is used is because if the content of synthetic fibers is 50% or less, the effect of the method of the present invention will be reduced. Furthermore, "cloth tail" is a general term for sheet-like structures such as ordinary woven fabrics, knitted fabrics, and non-woven fabrics. The fabric is always coated with an emulsion containing a fluorine-based water repellent, and the fluorine-based water repellent used in the first step of the method of the present invention usually has fluorocarbon iron in its side chain and contains a polyacrylate polymer or the like. It is an emulsion made by dispersing organic polymers in the main chain in water, and takes advantage of the clean water properties of the fluorocarbon chains due to their low surface tension.

Further, it is also possible to add an antistatic agent, a penetrating agent, etc. to the emulsion-based fluorine-based water repellent. In the first step of the method of the present invention, the emulsion containing a fluorine-based water repellent is applied to the fabric by an impregnation/pad method or a coating method, followed by drying. Further, if necessary, heat treatment is performed, and the heat treatment conditions may be set at a temperature and time appropriate for the type of fabric to be treated and the type of water repellent agent. Next, in the second step, a solvent solution containing a silicone-based water repellent alone or a mixture with a fluorine-based water repellent is applied. The agent is an organic polymer having a fluorocarbon chain as described above in its side chain and a main chain such as a polyacrylic acid ester polymer.

As the solvent, 1,1,1-trichloroethane, trichloroethylene, /g-chloroethylene, etc. can be used. The water repellent in the second step uses a silicone water repellent alone or a mixture of a silicone water repellent and a fluorine water repellent; in the latter case, the influence of the mixing ratio is small; It tends to be more effective than a water solution alone.

In addition, in the second step, the water repellent agent is applied in the same way as in the first step.
This is done by impregnation/pad method or coating method, followed by drying and heat treatment.

The heat treatment performed here is very important for the development of water performance and durability, and the heat treatment conditions may be carried out at a temperature and time appropriate to the water repellent used and the type of fabric to be treated. Furthermore, an antistatic agent may be added to the whipping solution, and since it is a solvent solution, it has good permeability. ．．
The most important features of the method of the present invention are the water repellent treatment using an emulsion-type fluorine-based water repellent, and the repellency using a solvent solution type silicone water repellent alone or a mixture of a silicone-based water repellent and a fluorine-based water repellent. By combining water processing, it has become possible to achieve superior durability in twill water processing, which cannot be obtained with the former or the latter alone.

Although the reason for this is not clear, the present inventors speculate as follows regarding this point.

That is, in the method of the present invention, by performing water repellent treatment in two stages, the penetration of the water repellent agent into the fabric is much better than in the conventional case where water repellent treatment is performed in the first stage, and the water repellent agent is It is thought that it adheres uniformly to the fabric belt, resulting in excellent twill properties.

Therefore, if water-repellent products processed in a normal one-step process are dried only by natural drying after washing, the water-repellent properties will be significantly reduced, but if water-repellent processing is performed using the method of the present invention, the water repellency will be reduced to a level similar to that in a natural drying room. There is almost no decrease in hydrophilicity even in dry conditions. The method of the present invention will be explained by the following examples, but the present invention is not limited thereto in any way.

Example 1 Taffeta was woven using 70 denier/12 filament nylon filaments as the warp yarn and 70 denier/24 filament nylon filament yarn as the overall yarn, and after scouring, presetting and dyeing in the usual manner, the following Pad with the treatment of prescription 1 (pickup 30%), 10
After drying at 0°C, heat treatment was performed at 160qC for 1 minute.

Prescription 1 Asahi Guard AG-710 (manufactured by Asahi Glass, emulsion type, fluorine-based water repellent) 5 parts AG Accel 700
1 part (Meisei Chemical, antistatic agent) isopropanol (penetrating agent) 2 parts water
92. Next, apply the cloth to the treatment of Prescription 2 below (Pickup 3).
After drying at 100 qo (5%) and 100 qo, solvent-based water repellent processing was performed by heat treatment at 160 oo x 1 minute.

Prescription 2 Asahi Guard AG-650 (manufactured by Asahi Glass, solvent type, fluorine water repellent) 2 parts Poron Coat (manufactured by Shin-Etsu Chemical, solvent type, silicone water repellent)
Part 2 trichlorethylene
96 parts In order to compare with the method of the present invention, the following treatments of Comparative Example 1 and Comparative Example 2 were performed and compared with the method of the present invention.

Comparative example 1 Ny used in Example 1.

After scouring, presetting, and dyeing a nylon taffeta of the same standard as that of Example 1 in the same manner as in Example 1, Example 1
Comparative Example 1 was obtained by performing emulsion-based Yabusui processing under the same conditions as in Prescription 1. Comparative Example 2 Nylon taffeta of the same standard as the nylon taffeta used in Example 1 was scoured, preset, and dyed in the same manner as in Example 1, and then treated with solvent-based acid water under the same conditions as Recipe 2 in Example 1. Comparative Example 2 was obtained.

Table 1 shows the twill water content of the processed cloth obtained in Example 1, Comparative Example 1, and Comparative Example 2.

In addition, the purity level is JIS-L-1018, 1041, 10
The measurements were carried out according to the spray method of No. 79, washing was carried out by the home washing method and dry cleaning method, and drying was carried out by air drying and ironing.

Table 1

Claims (1)

[Claims] 1 The first step is to apply an emulsion containing a fluorine-based water repellent to a fabric containing 50% or more of synthetic fibers, dry it, and if necessary heat treat it, followed by a silicone-based water repellent alone or a fluorine-based water repellent. A durable water repellent finishing method characterized by comprising a second step of applying a solvent solution containing a mixture of and drying and heat treating.