Synthetic net material

Details Synthetic net material Synthetic net material

1978-07-25

1981-05-05

Lesmes, George F.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including aperture

264DIG81, 264146, 264147, 428116, 428131, 428136, 428255, B32B 312

Patent

active

042659566

ABSTRACT:
A net formed from partially crystalline synthetic material is made by first forming a plurality of parallel rows of overlapping slits in a solid, biaxially oriented shrinkable sheet of plastic film, such as polypropylene. The sheet is heated to produce a film lattice through shrinkage and thereafter stretched in the longitudinal direction while maintained at a temperature below the crystalline melting point, thereby causing the web portions to be stretched into thin filaments while the intersection portions remain undrawn. The resulting net comprises rhomboid-shaped meshes defined by the filaments and intersections and is expandable in a direction transverse to the net by a multiple of the width of the net.

REFERENCES:
patent: 3505157 (1970-04-01), Fields et al.
patent: 3790652 (1974-02-01), Colijn et al.
patent: 4140826 (1979-02-01), Liu

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