Single-layered hot-melt film adhesive which can be wound on a re

Details Single-layered hot-melt film adhesive which can be wound on a re Single-layered hot-melt film adhesive which can be wound on a re

1995-10-06

1997-01-14

Zirker, Daniel

Stock material or miscellaneous articles

Web or sheet containing structurally defined element or...

Adhesive outermost layer

428355EN, 428516, 428343, B32B 712

Patent

active

055937756

ABSTRACT:
A single-layered, plastic and elastic thermoplastic hot-melt adhesive film which does not have a separating layer, wherein it can be wound on and off a reel without the use of a supplementary separating material, is essentially free of antiblocking agents and/or lubricants and that the maximum of its thermoanalytically determined main melting peak is below 90.degree. C. and which is essentially formed from at least two olefin copolymers with polar comonomers A and B, wherein ethylene is preferably used as an olefinic monomer, and whose essential comonomers contain oxygen atoms and the essential oxygen-containing comonomers in the olefin copolymers A and B are not identical, wherein the total proportion of oxygen-containing comonomer in the total weight of polymer resin forming the film is between 18 wt. % and 40 wt. % and the proportion of oxygen-containing comonomers in copolymer A is at least 60 wt. % of the total weight of oxygen-containing comonomers and copolymers A and B are mutually degraded under a sufficient shearing force for copolymer B to be present as a finely distributed second phase in copolymer A.

REFERENCES:
patent: 4091195 (1978-05-01), Vitek
patent: 4331576 (1982-05-01), Colon et al.
patent: 4524104 (1985-06-01), Hagio et al.
patent: 4629657 (1986-12-01), Gulati et al.
patent: 5352516 (1994-10-01), Therriault et al.

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