Blended CPE/crystalline thermoplastic polyolefin membrane

Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond

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Details

428141, 428247, 428255, 428516, B32B 2712, B32B 2732

Patent

active

052291979

ABSTRACT:
A blend of CPE and crystalline thermoplastic polyolefin (e.g., ultralow density polyethlene) is presented. This material is easily processed on the rolls of a rubbermill (i.e., calender) to form continuous sheets of membrane suitable for use in single ply roofing and other similar applications. In a preferred embodiment, a membrane formed from the composition of this invention is used as the bottom layer of a multilayer single ply roof with the upper layer or layers comprising known materials.

REFERENCES:
patent: 4978703 (1990-12-01), Ainsworth et al.
patent: 4978716 (1990-12-01), Flynn et al.

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