Heat-superstabilized semi-finished products containing thermopla

Details Heat-superstabilized semi-finished products containing thermopla Heat-superstabilized semi-finished products containing thermopla

1987-08-18

1990-06-19

Lesmes, George F.

Stock material or miscellaneous articles

Structurally defined web or sheet

Including components having same physical characteristic in...

428517, 428519, 428521, 162127, 162128, 162160, 1621641, B32B 702, B32B 2708, D21F 1100

Patent

active

049352903

ABSTRACT:
This heat-superstabilized semi-finished product containing thermoplastic resin is constituted of at least two layers: at least one surface layer S designed to be exposed to a source of heat and at least one other layer C which is not directly exposed to said source of heat, said layer S having an overall content by weight of stabilizer which is between 3 and 30 times greater than that of layer C, and said layer S having a surface density between 50 and 600 g.m..sup.-2.

REFERENCES:
patent: 2645249 (1953-07-01), Davis et al.
patent: 3518153 (1970-06-01), Slosberg et al.
patent: 3582418 (1971-06-01), Schuur
patent: 3755069 (1973-08-01), Crawford et al.
patent: 4320175 (1982-03-01), Hisazumi
patent: 4451539 (1984-05-01), Vallee et al.
patent: 4645565 (1987-02-01), Vallee et al.

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