초록 ▼

A clear, flexible, sealed container may be made of first and second plastic sheets sealed together at their peripheries. The first plastic sheet defines a bulge to increase the inside volume of the container, and comprises a laminate of a layer of polyolefin and a blended layer of polyolefin and a b

A clear, flexible, sealed container may be made of first and second plastic sheets sealed together at their peripheries. The first plastic sheet defines a bulge to increase the inside volume of the container, and comprises a laminate of a layer of polyolefin and a blended layer of polyolefin and a block copolymer of polyolefin and polystyrene. The second plastic sheet is a bonded laminate of a layer of biaxially oriented polypropylene and nonoriented polypropylene, peripherally bonded to the layer of polyolefin of the first plastic sheet.

대표청구항 ▼

A clear, autoclavable, flexible, sealed container having good water vapor barrier properties and flex crack resistance, said container being made of first and second plastic sheets sealed together at their peripheries, said first plastic sheet comprising a laminate of (1) at least one layer of a pol

A clear, autoclavable, flexible, sealed container having good water vapor barrier properties and flex crack resistance, said container being made of first and second plastic sheets sealed together at their peripheries, said first plastic sheet comprising a laminate of (1) at least one layer of a polyolefin derived principally from propylene, and being of semi-crystalline characteristic to exhibit a low permeability to water vapor, bonded to (2) a blended layer consisting essentially of 30 to 90 percent by weight of a block copolymer having thermoplastic, rubbery characteristics, and having rubbery polyolefin blocks consisting essentially of ethylene and butylene units, and blocks of a polystyrene; the rubbery polyolefin blocks comprising from 60 to 85 percent by weight of said block copolymer; and from 10 to 70 percent by weight of a polyolefin derived principally from at least one of propylene, ethylene, and 4-methylpentene-1, said polyolefin having a Vicat Softening Temperature of above 120°C.; said second plastic sheet comprising a bonded laminate comprising a layer of relatively nonoriented polypropylene and a layer of biaxially oriented polypropylene, said nonoriented polypropylene being peripherally bonded to said layer of polyolefin of the first plastic sheet.