一种易撕膜及其制备方法
Easy-tear films are prepared by blending cross-linked polyethylene and linear polyethylene, combining dynamic cross-linking networks and permanent cross-linking networks. This solves the contradiction between low-temperature shrinkage and easy-tear performance in existing shrink films, achieving simultaneous high strength and easy-tear properties under low-temperature shrinkage, and reducing production costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SICHUAN YIHAN NEW MATERIAL TECH CO LTD
- Filing Date
- 2026-05-18
- Publication Date
- 2026-07-17
AI Technical Summary
Existing shrink films sacrifice mechanical properties when reducing shrinkage temperature, and their tearability is affected during heat shrinkage, making it difficult to use them simultaneously in low-temperature shrinkage and tearability scenarios. Furthermore, the use of adhesive layers increases production costs and film thickness.
Cross-linked polyethylene and linear polyethylene are used as masterbatches to prepare easy-tear films through co-extrusion and unidirectional stretching and orientation processes. By combining dynamic cross-linking networks and permanent cross-linking networks, the bonding force between each film layer is improved, and the easy-tear properties are retained by controlling the stretch ratio, heat shrinking temperature and heat shrinking time.
This technology achieves simultaneous improvement in the mechanical properties and tearability of the film under low-temperature shrinkage, avoiding the use of adhesive layers, reducing production costs, and maintaining the stability and tearability of shrink packaging.
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