Synthetic resins or natural rubbers -- part of the class 520 ser – Synthetic resins – Cellular products or processes of preparing a cellular...
Patent
1991-11-05
1992-07-28
Foelak, Morton
Synthetic resins or natural rubbers -- part of the class 520 ser
Synthetic resins
Cellular products or processes of preparing a cellular...
264 41, 264 455, 2642902, 521 51, 521 81, B29D 900, C08J 900
Patent
active
051341735
ABSTRACT:
There are disclosed opaque, biaxially oriented polymeric film structures each comprising a thermoplastic polymer matrix material, e.g., polypropylene, within which is located a stratum of voids, and positioned within each of at least a substantial number of the voids is at least one spherical void-initiating solid particle (i.e., a cavitating agent) of cross-linked polystyrene (CLPS) which is phase-distinct and incompatible with the matrix material, the volume of the particle being substantially less than the volume of the void, with one generally cross-sectional dimension of the particle at least approximating a corresponding cross-sectional dimension of the void.
Also disclosed is a method of preparing the foregoing film structure by extruding into a film a combination of the matrix material and CLPS particles dispersed therein, and biaxially orienting the film either simultaneously or sequentially.
REFERENCES:
patent: 4377616 (1983-03-01), Ashcraft et al.
patent: 4632869 (1986-12-01), Park et al.
patent: 4720416 (1988-01-01), Duncan
patent: 4741950 (1988-05-01), Liu et al.
patent: 4758462 (1988-07-01), Park et al.
Zou et al., Journal of Polymer Science: Part A: Polymer Chemistry, vol. 28, 1909-1921 (1990).
C. M. Tseng et al., Polymeric Materials Science and Engineering, vol. 54, (New York, ACS, 1986) 362-366.
Joesten Burdette L.
Su Tien-Kuei
Foelak Morton
McKillon Alexander J.
Mobil Oil Corporation
Speciale Charles J.
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