Process for fixing plastic reinforcing pins into non-woven filam

Details Process for fixing plastic reinforcing pins into non-woven filam Process for fixing plastic reinforcing pins into non-woven filam

1993-11-01

1996-01-16

Maki, Steven D.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including aperture

156253, 156270, 156291, 264128, 264154, 428288, D04H 158, D04H 166

Patent

active

054846412

ABSTRACT:
A method of fixing plastic reinforcing pins into non-woven filamentary material includes the steps of: (a) providing an elongated web of randomly-aligned synthetic fibers, (b) creating a repeating pattern of holes through the by a hole-punching mechanism having a plurality of heated punch heads maintained at a temperature above the melting point of the synthetic fibers, (c) conveying the web from the punching mechanism over a supporting belt such that the belt provides a closed bottom for each hole, (d) injecting a quick-setting liquid polymer into the holes with an injector mechanism having a plurality of liquid injector nozzles arranged in an identical pattern as the pattern of punch heads and operated in coordinated sequence with the punching mechanism, such that an injector nozzle is inserted into a corresponding hole, and (e) allowing the severed ends of the fibers to imbed into the liquid polymer before it sets. The liquid polymer may be created by mixing a quick-setting liquid resin and cross-linking hardening agent just prior to injection into the holes and supplying the mixture to each nozzle.
The invention also includes a non-woven filamentary material having plastic reinforcing pins fixed into it by this process.

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