Dry-wet united web forming compound process

Abstract

The invention relates to a dry-wet united web forming compound process. The dry-wet united web forming compound process includes the following steps that a, the preparation before web forming is conducted, clean pure cattle leather is ground to prepare cattle leather fibers through a splitting process; b, the fiber carding is conducted; c, the united web forming is conducted, since the dry-laid web forming and the wet-laid web forming are conducted at the same time, the carded cattle leather fibers are prepared into a mixture of fibers and water through waterpower dispersing, beating, dilution and adding of a dispersing agent, the cattle leather fibers are loosened in the water in a filament form to form fiber suspension pulp, the fiber suspension pulp is transported to a web former, the fiber suspension pulp is tiled on the surface of non-woven fabric in a wet state to form a web, and the formed web is a semi-finished product web; on the semi-finished product web, the cattle leather fibers are blown to the web forming curtain on the semi-finished product web to form a second layer fiber web by the adoption of an airflow clutter web forming method, through the paper-making wet method dewatering, a cattle leather fiber web with the moisture content of 120%+/-5% is formed on the surface of the non-woven fabric, and then the cattle leather fibers composite with the non-woven fabric through the reinforcing of a spun-laced method.

Description

technical field [0001] The invention relates to the technical field of papermaking, in particular to a combined dry-wet web-forming composite process. Background technique [0002] The non-woven fabrics produced by dry-laid webs currently account for more than 50% of the world's total non-woven fabric production. The dry-laid spunlace nonwoven web needs to go through one or more passes of carding, cross-lapping, airflow forming, and then transfer to the spunlace entanglement process. The dry-laid process limits the production speed, and the fiber fineness cannot be lower than 1.2 denier. [0003] Using the wet-forming process, the fibers in the suspension slurry are condensed into a web on the web-forming curtain, and then contacted with the paper-making felt, and the fiber web is transferred to the paper-making felt by using the surface roughness difference between the forming mesh curtain and the felt, and the paper-making felt is then reassembled. The web is transferred...

AI Technical Summary

Problems solved by technology

The unfavorable factors of using the wet-laid process are: the papermaking felt must be selected in the fiber web preparation stage, the process is complicated, and the equipment occupies a large area

[0004] Due to the advantages and disadvantages of the current dry-laid and wet-laid methods, the application of each in nonwovens is limited.