一种高强热缩膜及其制备工艺
By constructing a synergistic mechanism between the surface quaternary graft copolymer and the core LDPE/EVA/POE ternary system, combined with a chemical bonding network, the comprehensive performance issues of heat shrink film in terms of transparency, strength, shrinkage rate and low-temperature toughness were solved, resulting in a high-strength, high-shrinkage and environmentally friendly non-toxic heat shrink film.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- SICHUAN YIHAN NEW MATERIAL TECH CO LTD
- Filing Date
- 2026-05-07
- Publication Date
- 2026-07-17
AI Technical Summary
Existing heat shrink films cannot simultaneously achieve a combination of high transparency, high strength, high shrinkage rate, ultra-low temperature toughness, and environmentally friendly and non-toxic properties.
By constructing the molecular structure of the surface quaternary graft copolymer (PMP-g-EMH), the synergistic mechanism of the core LDPE/EVA/POE ternary system and the reactive compatibilizer POE-g-GMA, and through the maleic anhydride-epoxy ring-opening reaction chemical bonding network between the surface and core layers, interlayer chemical bonding is achieved.
It achieves high transparency (haze ≤3%, light transmittance ≥94%), high strength (tensile strength ≥55MPa), high shrinkage (transverse shrinkage ≥55% at 100℃) and ultra-low temperature toughness (good flexibility at -50℃). The material is also environmentally friendly and non-toxic, making it suitable for food packaging and low-temperature environments.
Smart Images
Figure SMS_1 
Figure SMS_2