Knitted fabric and preparation method thereof

Abstract

The invention provides a knitted fabric and a preparation method thereof. The preparation method includes the steps of squeezing knitted cloth which is dyed or washed, wherein the liquid content of the cloth surface is controlled to be not higher than 100%; applying a finishing liquid to the knitted cloth which is squeezed, using a foam generator for foaming the finishing liquid, then applying thefoamed finishing liquid to the knitted cloth, and conducting stentering and drying on the knitted cloth to obtain the knitted fabric. The knitted fabric obtained by means of the preparation method remains unchanged in hand feeling before and after treatment and is free of color differences and low in shrinkage rate.

Description

technical field [0001] The invention relates to a method for preparing knitted fabrics, belonging to the technical field of knitting dyeing and finishing. Background technique [0002] The textile industry is a traditional pillar industry of my country's national economy and an important livelihood industry. However, the resource consumption and pollutant discharge in the textile production process have become a difficult challenge for our country. The green production method of energy saving and emission reduction has also become the focus of the world's printing and dyeing industry research. [0003] At present, the traditional production process of knitted fabrics is: weaving blank→dyeing or washing→spreading→drying→setting→finished product. This traditional production process needs to add a drying process before finalizing the shape, which mainly has the following problems: [0004] 1. The process flow is long, which affects production efficiency and increases the proba...

AI Technical Summary

Problems solved by technology

[0004] 1. The process flow is long, which affects production efficiency and increases the probability of defects

[0005] 2. The liquid-carrying rate of the knitted fabric after water rolling is relatively high, generally above 100%. In order to ensure the quality of the cloth surface shrinkage, feel, color and subsequent shaping process, the cloth sample needs to be completely dried, which consumes a lot of energy , increase costs, and do not conform to the concept of environmental protection

At the same time, traditional enterprises do not have accurate standard judgments on whether fabrics are dried. The setting of process parameters usually relies on manual settings based on experience, which often results in over-drying or under-drying of fabrics. Deteriorated, and will return to re-dry when it is not fully baked, excessive waste of energy

[0006] 3. The traditional setting process mainly adopts padding and rolling. The fabric sample needs to be squeezed by upper and lower pressure rollers to increase the radial tension, which is not conducive to the shrinkage control of knitted fabrics; the working fluid has a large proportion of ingredients, which wastes resources and increases the burden on environmental protection.

Although this production process saves the drying process, it still has many disadvantages, such as: due to the high liquid retention rate of the wet cloth (above 100%), when the wet cloth passes through the trough, the moisture on the fabric and the trough The chemical is exchanged, resulting in lower and lower concentrations of the chemical in the tank

Even if chemicals are constantly replenished during the production process, it is still difficult to ensure that the concentration of chemicals in the trough is consistent during the production process, resulting in inconsistent hand feeling of the finished fabric, large color difference between front and back, and large waste of chemicals

Moreover, the wet cloth itself is heavy, and the shrinkage is more difficult to control. It is not suitable for varieties with high shrinkage requirements.

[0008] In addition, applying chemicals to the cloth surface in the form of spraying, although this method can save chemicals and reduce water waste, but there are shortcomings such as uneven spraying, impermeable spraying, and low application amount, and further research is still needed

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