Biodegradable multilayer film, method of manufacturing the same, and environmentally friendly packaging material comprising the same
By using a multilayer film structure of PHA resin and EVOH resin, the problems of packaging materials being difficult to decompose and having insufficient barrier properties are solved, providing a biodegradable and environmentally friendly packaging solution.
CN117715758BActive Publication Date: 2026-04-28CJ CHEILJEDANG CORP
3 Cites 0 Cited by
Patent Information
- Application Number
- CN202280052296.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Priority Date
- 2021-07-30
- Filing Date
- 2022-07-27
- Publication Date
- 2026-04-28
- Estimated Expiration
- 2042-07-27
AI Technical Summary
Technical Problem
Existing packaging materials are difficult to decompose completely in the natural environment, especially in soil and ocean, leading to environmental pollution, while lacking effective barriers against oxygen and moisture.
Method used
A biodegradable multilayer film structure containing polyhydroxyalkanoate (PHA) resin is used, combined with a barrier layer of ethylene vinyl alcohol (EVOH) resin, and the film is prepared by melt extrusion to ensure heat sealing strength and gas barrier properties.
Benefits of technology
It achieves biodegradability under natural conditions, possesses excellent oxygen and moisture barrier properties, and has good adhesion, making it suitable for environmentally friendly packaging materials.
✦ Generated by Eureka AI based on patent content.
Abstract
The present invention provides a biodegradable multilayer film, a method for manufacturing the same, and an environmentally friendly packaging material including the same, the biodegradable multilayer film including a base layer and a biodegradable resin layer, wherein the biodegradable resin layer includes a polyhydroxyalkanoate (PHA) resin, and the biodegradable resin layer has a heat bonding strength of 0.5 kgf / 15 mm to 15 kgf / 15 mm, a water permeability of 3 g / m2·atm·day or less, and an oxygen permeability of 10 cc / m2·atm·day or less. The biodegradable multilayer film can be biodegradable under natural conditions such as soil and the ocean, can improve barrier properties against moisture and oxygen without including aluminum or nylon materials, and can further improve adhesion properties. Accordingly, the biodegradable multilayer film can be used as a packaging material in various fields, thereby providing a high-quality and environmentally friendly packaging material.
Need to check novelty before this filing date? Find Prior Art