What are the specific methods for shrink-proof finishing
The anti-shrinkage finishing of the shrinking machine has played an important role in the smooth progress of our work. In fact, there are many methods of anti-shrinking finishing. The more commonly used is the mechanical pre-shrinking, that is, through the pre-shrinking machine to solve the warp shrinkage is effective The method increases the weft and warp weave of the fabric to a certain degree, so that the fabric has a relaxed structure.
In fact, the so-called mechanical pre-shrinking is the potential shrinkage that originally existed in the fabric, let it be pre-retracted before becoming a finished product. There are many kinds of preshrinking machines used in the mechanical pre-shrinking process, including the super-feed needle clip tenter, the rubber blanket compression pre-shrinking machine, the rubber blanket compression type shrinking machine and the blanket compressor pre-shrinking machine.
Among them, the super-feeding needle-narrow stenter uses an overfeed device to stretch the fabric in a relaxed state to allow the fabric to be retracted when the web is dried at a fixed width, thereby achieving the purpose of improving warp shrinkage. The rubber blanket of the rubber blanket compression type shrinking machine will be thinly stretched when passing between the guide roller and the pressure roller, and will shrink and return to the original state after leaving, forcing the fabric to shrink synchronously.
The entire equipment consists of a feeding device, a dampening device, a short cloth tenter, a three-roller blanket compression device, and a blanket dryer. After shrinking, the shrinkage rate of the product can be reduced to less than 1%. The equipment structure is simple. Due to the pressure between the guide roller and the pressure roller, the fabric shrinks and is more fully set.
When the blanket compression type shrinking machine is working, when the thick blanket passes around the guide roller with a smaller diameter, the outer layer expands, and when it exits, the original shape is restored, so that the fabric closely clinging to the extending surface of the felt is synchronously shrunk to eliminate the potential. The purpose of the contraction. Including the introduction of cloth, to wet, the whole width, shrinkage and drying and other components of stereotypes, in particular, the shrinkage rate of the product can be reduced to 2% or less, feel full, soft, with good performance.
In addition to the above mechanical preshrinking, the material can also be chemically treated to achieve the goal of pre-shrinking. In fact, it is trying to reduce the hydrophilicity of the material so that it cannot swell in water, so that the fabric does not produce serious Shrinkage phenomenon. Mainly used resin initial shrinkage or cross-linking agent treatment, that is, the fabric after wrinkle-free finishing, at the same time a shrink-proof effect. http://www.haida-textile.com/