Synthetic resin sheet having notching strip and container

Details Synthetic resin sheet having notching strip and container Synthetic resin sheet having notching strip and container

1987-04-07

1989-08-08

Ives, P. C.

Stock material or miscellaneous articles

Hollow or container type article

Nonself-supporting tubular film or bag

4284761, 428516, 428520, 428 354, 428 357, 428 366, 2641761, 206161, 206203, 220430, 220 96, B65D 7730, B65D 2528

Patent

active

048551686

ABSTRACT:
A synthetic resin sheet integrally coextruded by coextruding sheet main body portions and a slender notching strip interposed between right and left side sheet main body portions, wherein the notching strip is formed of a mixture resin material of a first synthetic resin material of molding material of the sheet main body portions, a second synthetic resin material impossible to be bonded with the first synthetic resin material, a third synthetic resin material possible to be bonded with the first and second synthetic resin materials, and a fourth synthetic resin material for softening the molded notching strip, melt index value of the notching strip is the same as or substantially lower than that of the main body portions, and the softening temperature of the notching strip is the same as or substantially higher than that of the sheet main body portions, and a thermally molded container formed of the sheet, thereby smoothly and clearly separating the sheet main body portions and the notching strip of the sheet.

REFERENCES:
patent: 4533576 (1985-08-01), Tanahashi et al.
patent: 4613531 (1986-09-01), Gokcen et al.

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