초록 ▼

A transparent multi-layer container comprising a co-extrudate of an oxygen-barrier resin layer and an orienting resin layer which is monoaxially or biaxially oriented is disclosed. An adhesive resin layer is preferably interposed between the oxygen-barrier layer and the orienting resin layer, and th

A transparent multi-layer container comprising a co-extrudate of an oxygen-barrier resin layer and an orienting resin layer which is monoaxially or biaxially oriented is disclosed. An adhesive resin layer is preferably interposed between the oxygen-barrier layer and the orienting resin layer, and this co-extrudate is drawn and molded at a specific temperature determined relatively to the melting points and softening points of the respective resins. This container is excellent in the combination of transparency, rigidity, mechanical strength, gas-barrier property and interlaminar peel strength.

대표청구항 ▼

A process for the preparation of containers which comprises forming a multi-layer structure comprising at least one layer composed of an oxygen-barrier thermoplastic resin having an oxygen permeability lower than 5.5×10-12 cc.cm/cm2.sec.cmHg as measured at 37°C. and at least one layer comprising an

A process for the preparation of containers which comprises forming a multi-layer structure comprising at least one layer composed of an oxygen-barrier thermoplastic resin having an oxygen permeability lower than 5.5×10-12 cc.cm/cm2.sec.cmHg as measured at 37°C. and at least one layer comprising an orienting thermoplastic resin other than the oxygen-barrier thermoplastic resin by co-melt-extrusion, said two resins being selected so that the requirement represented by the following formula: │TB-TO│≤35°C. (1) wherein TB stands for the melting or softening point (°C.) of said oxygen-barrier thermoplastic resin and TO stands for the melting or softening point (°C.) of said orienting thermoplastic resin, is satisfied; and molding said multi-layer structure into a container at a molding temperature (Tm) satisfying the requirement represented by the following formula: │Tm -TB│≤30°C. (8) wherein TB is as defined above and Tm stands for the molding temperature (°C.), and under such conditions that orientation of the orienting thermoplastic resin is caused at least in a smallest-thickness portion of the container.