Sheet shaped yarn pinches slop padding method and apparatus

Abstract

The invention relates to a yarn processing method. A flake yarn amplitude shrinking padding method is processed according to the following two steps of: the first steps of amplitude shrinking padding: dipping the flake yarn unreeled from a warp beam after shrinking amplitude by an amplitude shrinking roller into a dipping slot, putting the yarn after dipped into a padder to remove redundant dipping liquid; the second step of amplitude expanding rolling; carrying out rolling on the flake yarn out of a roller after amplitude expanding by an amplitude expanding roller. The invention is mainly characterized in that the amplitude shrinking padding of the yarn integrates the advantages of bunchiness padding and flake padding and overcomes the defects of the two. The colorizing uniformity is improved remarkably; the left and right color difference and the front and back color difference are reduced remarkably; wherein, the left and right color difference reaches grade 4.5; the front and back color difference reaches grade 4.0, thus meeting the technical requirements. The device adopted by the invention has simple structure and reduces the broken end rate to a large extent.

Description

Technical field: [0001] The invention relates to a yarn processing method, in particular to a yarn padding method, and also to a yarn shrinkage padding device. Background technique: [0002] The yarn padding method refers to the method in which the yarn is dipped in various dipping liquids including dyeing liquid, and then the excess dipping liquid is rolled off by a paddle car. [0003] Existing yarn padding method can be divided into bundle padding and sheet padding two kinds according to yarn arrangement shape. The so-called bundle padding is to pad each independent yarn bundle (300-500 yarns per bundle), and its representative device is a bundle dyeing machine. The advantage of beam padding is uniform padding, but the disadvantages are many processes, low efficiency, and difficult yarn separation. The so-called flaky padding is to pad the yarns that are continuously arranged into sheets, and its representative device is a combined sizing and dyeing machine. The advant...

AI Technical Summary

Problems solved by technology

The disadvantages of equal-width padding are: 1. The amount of liquid in the edge and middle of the sheet yarn is inconsistent; 2. It is difficult to reduce the volume of the dipping tank during constant-width padding, which will cause hydrolysis of reactive dyes.

However, the residence time of the dyeing liquid in the dyeing tank should not exceed 10 minutes, otherwise the reactive dye will be hydrolyzed and the length of the transitional color difference of the yarn will be increased. From this point of view, the smaller the volume of the dyeing tank, the better, but the small volume dyeing tank Again constrained by sheet yarn width and impregnation time

Therefore existing technology is difficult to solve two mutually contradictory problems simultaneously

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