Five-Layer Polyethylene Film for Compressible Packaging
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Solution Overview
Problem
Existing packaging solutions struggle to balance raw material efficiency with the need for effective protection and sealing of compressible products, often resulting in either material wastage or compromised product safety.
Innovation Solution
A 5-layer polymer film composed of specific combinations of low density polyethylene (LDPE), high density polyethylene (HDPE), and linear low density polyethylene (LLDPE) is developed, which provides improved raw material efficiency while maintaining excellent sealing properties and protection for packaged products.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If thinner layers of materials are used to improve sustainability, then raw material efficiency is improved, but protection quality and sealing performance deteriorate
Solution Approach 1:
The packaging film is divided into five distinct layers, each with specific thickness and material composition (LDPE, HDPE, LLDPE combinations). This segmentation allows each layer to contribute specific functions (sealing, strength, barrier properties) while maintaining overall thinness and material efficiency.
Solution Approach 2:
The invention uses composite material structures combining different polyethylene types (LDPE, HDPE, LLDPE) in a five-layer configuration. Each polymer contributes different properties - LDPE for sealability, HDPE for tensile strength, and LLDPE for puncture resistance - achieving superior protection with reduced total material thickness.
2Loss of substance
If 3-layer films are used traditionally, then manufacturing is simpler, but thickness reduction and material efficiency are limited
Solution Approach 1:
The film structure is segmented into five layers with specific thickness allocations (e.g., 15-5-15-5-15 micrometers configuration), enabling greater thickness reduction and material efficiency compared to traditional 3-layer structures while maintaining manufacturability through standardized multi-layer extrusion processes.
Solution Approach 2:
The invention transitions from a 3-layer to a 5-layer dimensional structure, adding complexity in the layering dimension to achieve superior performance. This dimensional change enables better distribution of material thickness and functional properties across layers,实现ing 20% thickness reduction while maintaining protection quality.
3Volume of moving object
If compression packaging is used to reduce volume, then shipping efficiency is improved, but sealing requirements become more stringent
Solution Approach 1:
The film's physical parameters are optimized for compression packaging applications, with specific thickness (20-60 micrometers), material composition ratios, and layer configurations that maintain seal integrity under compression loads while minimizing package volume. The five-layer structure provides enhanced seal strength and puncture resistance necessary for compressed products.
Data Source
AI summary
The invention is directed to a multi layer film to be used as a flexible packaging material for enclosing and containing one ore more compressible products in a sealed condition. The 5 layer film according to the invention consists of: I. a first layer comprising low density polyethylene, II. a second layer comprising high density polyethylene, III. a third layer comprising linear low density polyethylene, IV. a fourth layer comprising high density polyethylene and V. a fifth layer comprising linear low density polyethylene.