Fiber raw material

The wet(Wetlaid Non Woven Fabric Wholesale) process principle and production process are generally the same as papermaking, but there are significant differences in fiber requirements and bonding methods. Since the fibers are networked in aqueous solution, this requires that the fibers must have good dispersibility in water. The specific requirements for the fiber are asfollows.

(1) The length of the fiber should not betoo long, and the proper slenderness ratio should be maintained. The longer thefiber, the worse the uniformity of the web. Moreover, the narrower the discrete distribution of fiber length, the better the dispersion of fibers in water.Chemical fiber requires good cutting quality, and long fiber and super longfiber are avoided as much as possible.

The slenderness ratio of the fiber refersto the ratio of the length of the fiber(Non Woven Polyester Fabric Supplier) to its largest radial dimension. Thelarger the slenderness ratio, the more difficult the fibers are to disperse inwater and tend to form a mass. Usually fiber length and fineness have thefollowing relationship

Cutting length (mm) = 5 × (fiber and number) 2

(2) The fiber is relatively straight andhas a small curl. The greater the degree of crimp of the fibers, the more complicated the curl, the more entangled between the fibers, the more difficultit is to disperse in water, especially the three-dimensional fibers are difficult to disperse.

(3) The fiber should have a certainhy groscopicity. The better the hygroscopicity of the fiber(China PET Nonwovens Manufacturer), the stronger theability of the fiber to swell in water and the better the dispersibility.

(4) The surface friction factor of the fiber is small. The greater the surface friction factor of the fiber, the moreeasily the fiber is entangled and the more difficult it is to disperse inwater. The dispersing property of the fiber can be improved by adding amoisture absorbent, a dispersing agent or the like to the slurry.