Stock material or miscellaneous articles – Structurally defined web or sheet – Discontinuous or differential coating – impregnation or bond
Patent
1993-09-28
1996-10-01
McCamish, Marion E.
Stock material or miscellaneous articles
Structurally defined web or sheet
Discontinuous or differential coating, impregnation or bond
428240, 428251, 428283, 428285, 428480, 523214, 524494, B32B 514, B32B 522, B32B 702
Patent
active
055609848
ABSTRACT:
A polyester resin laminated plate which has a smooth surface, has less anisotropy of mechanical properties, is inexpensive, has no restriction in size, thickness, etc., and has a good cutting workability is produced by a process including the steps of melt-extruding a composition including 100 parts by weight of a thermoplastic polyester resin compounded with from about 5 to about 40 parts by weight of a fibrous reinforcing material and from about 5 to about 50 parts by weight of a granular inorganic compound to form sheets, forcibly cooling the sheets to a temperature lower than the glass transition point of the polyester resin to provide plural sheets having a surface crystallinity of less than about 10%, laminating these plural sheets, and hot-pressing them at a pressure of from about 15 to about 150 kg/cm.sup.2 and at a temperature of from about 80.degree. to about 260.degree. C., with the rate of temperature increase of about 3.degree. C./minute or more to reach the temperature.
REFERENCES:
patent: 4726998 (1988-02-01), Ikenaga et al.
patent: 4806586 (1989-02-01), Nakai
patent: 4851287 (1989-07-01), Hartsing, Jr.
Aki Kenzou
Kometani Yoshiaki
Nakayama Yasuki
Ookubo Makoto
Tanimoto Ken'ichi
Cole Elizabeth M.
McCamish Marion E.
Unitika Ltd.
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