Method for applying foam chemical by extruding foam film through flow paving

Abstract

The invention provides a method for applying a foam chemical by extruding a foam film through flow paving. The method is characterized by comprising the following steps: forming chemical foams by virtue of a foam generating device, applying the chemical foams on a fabric, and breaking the chemical foams to transfer the chemical onto the fabric. The method for applying the chemical foams on the fabric is as follws: the chemical foams pass through slit type foam extrusion devices which are distributed transversely and evenly to form the foam film and are applied on the fabric through flow paving or on a rotating guide roller to be transferred onto the fabric. Therefore, the water consumption is reduced and the traditional process is optimized.

Description

technical field [0001] The invention relates to a method for uniformly applying chemicals to products such as woven fabrics, knitted fabrics, non-woven fabrics or yarns running on a plane. Background technique [0002] In the processing of textiles, non-woven fabrics or yarns, including pretreatment, dyeing, finishing, printing, sizing, printing and other processing, water is used as a medium to dilute chemicals. This will inevitably cause a high amount of water in the product during processing. In the traditional production process, water-based chemicals are applied to fabrics including woven fabrics, knitted fabrics, warp yarns, non-woven fabrics, etc., usually in the form of a padding machine, that is, the fabric is first soaked with liquid and then squeezed through the padding machine. Excess liquid is squeezed out. When this form is used, the inside of the fabric is usually in a liquid-saturated state, and the excess moisture in the liquid will eventually need to be ...

AI Technical Summary

Problems solved by technology

However, this kind of product with evenly applied foam is mainly used for fabrics that are not easy to deform under the action of tension and have relatively stable dimensions, such as most woven fabrics, and for some fabrics that are prone to deformation and edge curling under the tension of the production machine , low-density fabrics, etc. (such as knitted fabrics, non-woven fabrics, etc.), products that apply foam chemicals evenly on the market today, are still difficult to control

In order to solve the above-mentioned existing problems, a Chinese patent application number 201010508087.5 proposes an application device for knitted fabrics, but the installation and use of the device is complicated, and the process conditions are not easy to control; the application number is 201110047622.6. The method of evenly applying foam is mainly used for fabrics with relatively stable dimensions such as woven fabrics; and the U.S. patent US2006 / 0102071 A1 proposes a method to solve the curling problem existing in the production process of knitted fabrics. The method adopted in this method is The foam applicator is placed between the two sets of guide rollers, and the fabric is covered with the edge of the foam applicator to run, causing a large tension on the fabric, which is easy to deform the fabric, and the fabric is not supported by the guide rollers during operation. The application effect of chemicals, and this method has too much tension and is not suitable for light and thin fabrics such as non-woven fabrics

And patent US4118526, US4193762, WO80 / 00545, US4208173, US4266976, US4352277, US4365968, US4397650, some foam application methods are described in the 4773110 patent, but it all can not realize synchronous lateral uniform supply, foam has on fabric or between guide roller The phenomenon of staying will cause the attenuation of the foam on the fabric to be out of sync and cause the problem of uneven attenuation in the transverse direction, and the foam film that is evenly spread on the fabric in the transverse direction and synchronized with the fabric will eventually cause the foam to be applied unevenly on the fabric.

[0004] In order to solve the problem that the above-mentioned foam film is uniformly applied to the fabric, especially special fabrics such as stretch-sensitive fabrics, large-void fabrics and low-density fabrics, it is difficult to achieve uniform application of foam, while reducing waste of water resources, energy and sewage discharge , there is a need for a method that can evenly apply foam chemicals to special fabrics and at the same time achieve the purpose of saving water resources, energy, and reducing sewage discharge

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