Recyclable film for thermoforming

Abstract

Recyclable films having a first layer containing polyethylene, a second layer containing high-density polyethylene and hydrocarbon resin, and a third layer containing polyethylene may be used for thermoforming packaging components. Both the first and third layers have an overall density between about 0.92 g / cm<3> and 0.97 g / cm<3>. The film structure is advantageous as it can be more easily thermoformed than traditional high-density polyethylene films and can maintain the shape taken during thermoforming, exhibiting minimal warping or shrinking.

Description

technical field [0001] The present disclosure relates to film structures, particularly high performance recyclable films suitable for thermoforming into packaging components. Background technique [0002] High-performance packaging films are used to package many products such as food, pharmaceuticals, consumer or industrial goods. Environmentally sensitive products use specially designed packaging to help protect the product and extend shelf life to the point at which the product can be used by consumers. Typically, these packages are made from various types of polymers and additives that provide the properties needed to achieve "high performance". Materials selected for packaging can enhance, inter alia, barrier properties, physical properties or aesthetics. Often, packaging is designed to include multiple materials to achieve several features. [0003] Combining multiple materials into a single packaging material can create difficulties in determining how to dispose of ...

AI Technical Summary

Problems solved by technology

Molding of HDPE can be slower and result in poorly molded parts

Additionally, secondary crystallization of HDPE can cause warping and curling of molded parts in the hours and days after molding

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