Water entanglement process and product

Details Water entanglement process and product Water entanglement process and product

1989-06-30

1991-04-23

Chin, Peter

Paper making and fiber liberation

Processes and products

Non-uniform, irregular or configured web or sheet

162135, 162146, 162208, D21H 2702

Patent

active

050097474

ABSTRACT:
A method for hydroentangling nonwoven fibrous sheet material to significantly increase the strength thereof at low latex add-on values employs small diameter jets of high-pressure water in the form of coherent streams that concentrate the hydraulic energy over a distance equal to approximately the diameter of the fibers being entangled. While fiber entangling water jets have been utilized heretofore, the present invention employs a relatively lower pressure for the fiber rearrangement along with a synergistic effect of wood pulp and long polyester fibers coupled with small amounts of latex to achieve the unexpectedly high strengths within these light weight materials. The resultant sheet material possesses excellent uniformity of fiber distribution and improved strength characteristics over those typically obtained from prior art water jet enganglement processes requiring 300-2000% the enganglement input energy employed in this process.

REFERENCES:
patent: 1989435 (1935-01-01), Wallquist
patent: 3485706 (1969-12-01), Evans
patent: 3493462 (1970-02-01), Bunting et al.
patent: 3620903 (1971-11-01), Bunting et al.

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