Composite bituminous sheet, particularly for sealing members

Details Composite bituminous sheet, particularly for sealing members Composite bituminous sheet, particularly for sealing members

1979-12-06

1981-07-14

Bell, James J.

Stock material or miscellaneous articles

Structurally defined web or sheet

Edge feature

428192, 428219, 428230, 428251, 428252, 428253, 428489, B32B 1108, B32B 1110

Patent

active

042787246

ABSTRACT:
This invention relates to a composite bituminous sheet, particularly useful for sealing members.
Said sheet consists of a main or external zone (1) formed of a cloth which is substantially non-extensible under low stress surrounding at least one central zone (2) to which it is bound, which is formed of an extensible elastic cloth having a tensile elongation at break of at least 100%, the central and external zones being coated with the same bituminous composition having a high elongation at break and a softening point at least equal to 100.degree. C. when determined according to the standard Ring and Ball test.

REFERENCES:
patent: 2481370 (1949-09-01), Berge
patent: 3813280 (1974-05-01), Olszyk et al.
patent: 4035544 (1977-07-01), Iwasoki et al.

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