What is beam unwoven fabric making machine and PP spunbond unwoven fabric making machine and melt unwoven fabric making machine?
Definition of wet Nonwovens
The definition of the International Association of Nonwovens is: “Wet netting is a kind of paper-like nonwovens, which is made of fibers suspended in a water tank and then processed through a series of fixed nets. “That is to say, wet nonwovens are nonwovens made by dehydrating water, fibers and chemical additives in special shaping machines, which are fixed by physical and chemical methods.
Characteristics of wet process Nonwovens
The production speed is high enough to reach 400m/min
It is suitable for short fibers with a length of 20mm.
There are almost no restrictions on mixing different quality fibers.
The fibers in the mesh are arranged in disorder, and the wet nonwovens are almost isotropic.
The product is bulky and has good uniformity.
Production cost is low.
There is little possibility of transformation of wet nonwoven materials.
The water consumption is large.
Principle and process of wet Nonwovens
Principle of wet net forming technology
Based on the technology of paper making, water is used as a base for making fibrous web.
Technological process
Fiber raw material, suspension slurry preparation, wet net forming, reinforcement and post treatment.
Components of suspended propellers:
Fiber + dispersant + adhesive (or viscidity and fiber) + wet strengthening agent
The purpose of pulping
The function of dissolving: dispersing fibers into single fibers;
Hydration: the fiber expands after absorbing water and makes the pulp form colloid.
Broom effect: fiber surface fuzz, increase the specific surface, conducive to entanglement between fibers;
Mixing effect: mixing different fibers and adhesives and chemicals together.
