Process for producing a hollow vessel having a frosted glass-like surface
AssigneesToyo Boseki Kabushiki Kaisha, Yoshino Kogyosho Co., Ltd.
InventorsAkiho Ota, Masanori Nishikawa, Masao Hattori, Akio Tsuboi, Yoshihisa Hama, Tadashi Okudaira, Shigeharu Sugihara
Life of this patent
Estimating the term…
Abstract
A process for producing a hollow vessel having a frosted glass-like surface which comprises molding a crystalline thermoplastic polyester copolymer comprising units of ethylene terephthalate as the main component into a transparent parison, crystallizing at least the surface layer portion of the parison and then subjecting it to blow molding.
Claims6
A process for producing a hollow vessel having a frosted glass-like surface which comprises molding a crystalline thermoplastic polyester copolymer comprising 80 to 95 mole % of ethylene terphthalate units and 20 to 5 mole % of units selected from the group consisting of isophthalic acid, neopentyl glycol and mixtures thereof, said polyester copolymer having an intrinsic viscosity of not less than 0.5, into a transparent parison, crystallizing at least the surface layer portion of the parison and then subjecting it to blow molding at a temperature at which biaxial stretching or expansion is realizable.
Dependencies are inferred from the claim text.