Stretchable tear resistant porous elastomeric film elements and

Details Stretchable tear resistant porous elastomeric film elements and Stretchable tear resistant porous elastomeric film elements and

1993-05-14

1994-08-09

Zirker, Daniel

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

428231, 4283044, 2191217, 21912171, 21912176, B23K 2600, B65B 3301

Patent

active

053365542

ABSTRACT:
Process for providing thin elastomeric sheet elements with air-permeability and with improved resistance to tearing as a result of being punctured while in stretched condition. The process comprises exposing the sheet to interrupted, high intensity, narrow laser beams to form a plurality of small, closely-spaced laser perforations, each having smooth walls which resist tearing.

REFERENCES:
patent: 3226527 (1965-12-01), Harding
patent: 3617702 (1971-11-01), Flournoy
patent: 4023743 (1977-06-01), Erbach et al.
patent: 4028525 (1977-06-01), Mominee et al.
patent: 4218606 (1980-08-01), Whitman, III
patent: 4537809 (1985-08-01), Ang et al.
patent: 4672168 (1987-06-01), Saunders et al.
patent: 4743123 (1988-05-01), Legters et al.

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