A high temperature resistant bulk fluid packaging film material and a method of making the same

By using a three-layer co-extruded composite structure and a specific material combination, the heat resistance and puncture resistance of the packaging film are improved, solving the problem of insufficient heat resistance and puncture strength at high temperatures in existing technologies, and ensuring sealing and integrity at high temperatures.

CN122143450APending Publication Date: 2026-06-05QINGDAO LAF TECHNOLOGY CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
QINGDAO LAF TECHNOLOGY CO LTD
Filing Date
2026-04-22
Publication Date
2026-06-05

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Abstract

The application relates to the technical field of multilayer composite packaging film materials, and discloses a high-temperature-resistant bulk fluid packaging film material and a preparation method thereof. The packaging film is a three-layer co-extrusion composite structure, and comprises, from inside to outside, a heat-sealing inner layer, a bonding reinforcing layer and a heat-resistant outer protective layer; the heat-sealing inner layer contains metallocene linear low-density polyethylene, polymethylpentene and other raw materials, the bonding reinforcing layer is formed by compounding PET resin and EVOH resin, and the heat-resistant outer protective layer comprises high-density polyethylene, polyamide elastomer, activated basalt flake and other components. The packaging film can be used for high-temperature bulk fluid packaging, has excellent heat resistance, high-temperature puncture resistance and heat-sealing stability, and effectively solves the problems that existing packaging films are prone to softening and damage under high temperature.
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