One-step leaven washing method

Abstract

The invention relates to a washing process for worn-out finishing of denims, in particular to a one-step leaven washing method. In the one-step leaven washing method, when the bath ratio of 1 weight part of cloth to water is smaller than 1:15, the adding dosage of a washing leaven is 1.0 to 1.8 percent (o.w.f); or, when the bath ratio of 1 weight part of the cloth to the water is between 1:20 and 1:30, the adding dosage of the washing leaven is above 2.5 percent (o.w.f); or, when the bath ratio of 1 weight part of the cloth to the water is between 1:15 and 1:20, the adding dosage of the washing leaven is 1.8 to 2.5 percent (o.w.f); and after finishing the material adding, the method comprises the steps of raising the temperature to between 40 and 60 DEG C, performing constant temperature washing for 40 to 90 minutes, draining, adding clear water, adding an auxiliary agent in a ratio of 1-2 grams per liter, performing washing for 10 to 15 minutes, and performing dewatering and drying. The one-step leaven washing method effectively overcomes various difficulties in the production by a two-step method, can perform desizing and washing in one step, namely finish the desizing and the washing through one step, achieves process innovation, can change the present status of the prior production process, and is favorable for saving energy and water, improving the working efficiency and reducing the cost; besides, the product selling price can be matched with the price of the conventional washing leaven in the prior market, so the method has a good application and popularization prospect.

Description

1. Technical field: [0001] The invention relates to a washing process for denim fabric reverting and finishing, in particular to a one-step washing method using an enzyme. 2. Background technology [0002] Since the 1980s, the denim washing process has been gradually replaced by enzyme washing. So far, existing numerous washing enzymes come out both at home and abroad, but all there are many common problems: the process is long, and it will be processed through desizing before washing. Commonly used desizing methods are: alkaline method, warming water treatment method or amylase desizing method, etc. Obviously, this will cause defects such as long washing time, large water consumption, high power consumption, and high cost. As early as 2005, relevant experts from Novozymes, a world-renowned manufacturer of enzyme preparations in Denmark, had proposed to develop a one-step water washing process of denim enzymes that combines desizing and washing, and clarified many aspects ...

AI Technical Summary

Problems solved by technology

So far, there have been many washing enzymes at home and abroad, but there are many common problems: the process is long, and it needs to be desized before washing.

However, according to the introduction of the company, the price of the trial product they developed is more than 20% higher than that of conventional products, and it is difficult to popularize and apply it. So far, there has not been any report on the sale of this product in the Chinese market.