Needled non-woven tubing

Details Needled non-woven tubing Needled non-woven tubing

1977-09-21

1978-11-07

Bell, James J.

Stock material or miscellaneous articles

Hollow or container type article

Polymer or resin containing

428284, 428300, B32B 108

Patent

active

041247310

ABSTRACT:
Non-woven tubing is formed by winding a web on a stationary mandrel, multi-needling overlying turns and frictionally driving the formed tube about the periphery of the mandrel. The mandrel is tapered to accommodate shrinkage of the tube and to assist ejection of the formed tube without application of longitudinal tension on the formed tube. The mandrel preferably includes a helical surface for progressively ejecting the rotating tubing from the static mandrel. The tube product may be formed with diameters as low as 4 millimeters and walls as thin as 0.5 and is radially compressed immediately after needling.

REFERENCES:
patent: 3508307 (1970-04-01), Dilo
patent: 3540096 (1970-11-01), Porta
patent: 3909893 (1975-10-01), Wilde
patent: 3952121 (1976-04-01), Dilo

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