摘要:
This invention provides a multilayered structure comprising a layer of an ethylene-vinyl alcohol copolymer composition having specific flow characteristics in the relationship between the heating time and the extrusion rate measured with a capillary rheometer (Koka Flow Tester), and a hydrophobic thermoplastic resin layer. From the multilayered structure according to the present invention, molded articles having a multilayered structure and having an excellent appearance can be obtained; more particularly, in a continuous melt molding operation over a long period, a molded article having a multilayered structure and having an excellent appearance can always be obtained without worsening the appearance with running time.
摘要:
There is described a laminate having good gas barrier properties which comprises at least one barrier layer of a modified ethylene-vinyl alcohol copolymer containing 0.1 to 5 mol% of pyrrolidone ring-containing units and 20 to 55 mol% of ethylene units, with a degree of saponification of the vinyl acetate component being at least 98 mol%, and at least one layer of a thermoplastic resin. This laminate is superior in drawability, and it can be made by drawing into bottles, cups, and the like which are good in clarity, appearance, and gas barrier properties.
摘要:
Described are resin compositions containing a saponified product of a modified ethylene-vinyl acetate copolymer containing 0.1 to 10 mole percent of pyrrolidone ring containing units and shaped articles prepared from this composition, especially a multilayered structure formed by a high speed thermal drawing, having excellent uniform gas barrier properties without pinholes, cracks and localized uneven stretching.
摘要:
There is provided a coating material made of a saponification product of a modified ethylene-vinyl acetate copolymer containing a cross-linkable olefinically unsaturated monomer. The saponification product is characterized by its intrinsic viscosity not greater than 0.7 dl/g which is measured at 20°C using phenol containing 15 wt% of water as a solvent. This polymer is readily soluble in solvents, and the resulting solution can have concentration as high as 20 to 50 wt% and provide coating film which is as strong as that obtained from the conventional EVOH having a high degree of polymerization.
摘要:
There is described a laminate having good gas barrier properties which comprises at least one barrier layer of a modified ethylene-vinyl alcohol copolymer containing 0.1 to 5 mol% of pyrrolidone ring-containing units and 20 to 55 mol% of ethylene units, with a degree of saponification of the vinyl acetate component being at least 98 mol%, and at least one layer of a thermoplastic resin. This laminate is superior in drawability, and it can be made by drawing into bottles, cups, and the like which are good in clarity, appearance, and gas barrier properties.
摘要:
The present invention relates to resin compositions and laminates using saponified ethylene-vinyl acetate copolymers containing a polyether component. The products and laminates obtained from the resin compositions are flexible, have excellent flexural fatigue resistance and gas barrier properties and are extremely useful as flexible laminates.
摘要:
The present invention relates to resin compositions and laminates using saponified ethylene-vinyl acetate copolymers containing a polyether component. The products and laminates obtained from the resin compositions are flexible, have excellent flexural fatigue resistance and gas barrier properties and are extremely useful as flexible laminates.