Biaxially-oriented polyethylene thin films for thermoforming, method for producing the same, method for using the same, thermoforming method, and products

Abstract

To provide thermoformable thin films of nearly the same type suitable for reuse, provide a packaging material of well-balanced weight efficiency, and to produce uniformly deep-drawable thin films for making molded products having mechanical properties to be balanced after thermoforming.SOLUTION: A biaxially-oriented thin film for thermoforming is provided containing at least 75 wt.% polyethylene and at least 95 wt.% polyolefins, based on the total mass of the thin film. The polyethylene has an elongation at break of at least 7 in a stress-strain diagram, wherein the stress-strain diagram is measured at a temperature of 10°C below the melting point of the polyethylene determined at a heating rate of 10°C per minute by using a dynamic differential scanning calorimetry measurement. A method for producing such thin films and a method for using for thermoforming are provided. A method for producing molded products from the thin films and the molded procuts themselves are provided.SELECTED DRAWING: Figure 3

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