PEF Polyester Laminate with Heat-Sealable Resin Layer
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Solution Overview
Problem
Existing polyester films with furandicarboxylate units lack sufficient mechanical strength and transparency for industrial and packaging applications, and there is a lack of investigation into laminates with heat-sealability necessary for bag production.
Innovation Solution
A laminate comprising a biaxially oriented polyester film with a polyethylene furandicarboxylate resin and a heat-sealable resin layer, optimized for high lamination strength, gas barrier properties, and suitable for packaging applications.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If polyester films with furandicarboxylate units are used to replace conventional PET films, then environmental sustainability is improved, but mechanical strength and transparency are insufficient
Solution Approach 1:
The patent creates a composite laminate structure combining PEF film with conventional polyester film and adhesive layers. This composite approach allows the PEF component to provide environmental sustainability while the conventional polyester components compensate for mechanical strength deficiencies, achieving both eco-friendliness and structural integrity
2Adaptability or versatility
If polyester films with furandicarboxylate units are used to replace conventional PET films, then environmental sustainability is improved, but transparency is insufficient
Solution Approach 1:
The laminate structure combines PEF film with transparent conventional polyester film and clear adhesive layers. The conventional polyester components maintain high transparency while the PEF layer provides the environmental sustainability benefit, achieving both goals through material composition
3Reliability
If PEF film is used for packaging applications, then gas barrier properties are improved, but lamination capability is insufficient
Solution Approach 1:
The patent introduces adhesive layers as intermediary components between the PEF film and other packaging materials. These adhesive layers serve as mediators that enable strong lamination bonds, compensating for the PEF film's insufficient lamination capability while preserving its excellent gas barrier properties
Solution Approach 2:
The laminate structure combines PEF film with conventional polyester film and adhesive layers in a composite construction. This allows the PEF component to provide gas barrier reliability while the adhesive and conventional polyester components ensure strong lamination strength for packaging applications
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The laminate provides excellent lamination strength and gas barrier properties, making it suitable for packaging materials requiring air-tightness and suitable for foodstuff, pharmaceutical products, and electronic parts, while maintaining high transparency and mechanical properties.
Implementation Method 1
a biaxially oriented polyester film with a polyethylene furandicarboxylate resin... optimized for high lamination strength, gas barrier properties
Implementation Method 2
A laminate comprising a biaxially oriented polyester film with a polyethylene furandicarboxylate resin and a heat-sealable resin layer, optimized for high lamination strength
Data Source
Figure 1
AI summary
An object is to provide a laminate having excellent lamination strength that includes a polyester film having a furandicarboxylate unit and a heat-sealable resin layer, and to provide a packaging bag including the same. A laminate including a polyester film and a heat-sealable resin layer, wherein the polyester film is a biaxially oriented polyester film containing a polyethylene furandicarboxylate resin composed of a furandicarboxylic acid and ethylene glycol, a plane orientation coefficient ΔP of the film is 0.005 or more and 0.200 or less, a thickness of the film is 1 µm or more and 300 µm or less, a heat shrinkage rate of the film is 10% or less when heated at 150°C for 30 minutes, and lamination strength of the laminate is 2.0 N/15 mm or more.