Process for preparing surface-upgraded molded articles using a l

Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Producing multilayer work or article

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264259, 264511, 264512, 264516, 425503, 425504, 425509, 425521, 156212, 156245, 1563082, B29C 4904, B29C 4920, B29C 5112

Patent

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052326535

ABSTRACT:
Blow molding and thermoforming processes in which a mold system having low thermal inertia mold-halves provided with heating and cooling systems is utilized for producing plastic articles coated with surface-upgrading films of high melting polymers or polymers exhibiting a high scratch resistance to improve mechanical characteristics of the molded article. The films may be positioned, before the mold is closed, close to the low thermal inertia mold-halves. Rapid heating and rapid cooling of the mold-halves in contact with the surface-upgraded films permit strength adhesion of the upgrading material to the surface of the molded article.

REFERENCES:
patent: 3736201 (1973-05-01), Teraoka
patent: 5017126 (1991-05-01), Yamada et al.
patent: 5041247 (1991-08-01), Kim
Kiek-Othmer, 3rd Edition, vol. 6, pp. 406-407.

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