Segmented Gas Barrier Resin Layer for Multilayer Bottle Delamination
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Solution Overview
Problem
Multi-layered bottles composed of polyester resin and gas barrier layers like EVOH or nylon resin often experience delamination, which can spoil the bottle's appearance and reduce product value.
Innovation Solution
A gas barrier resin layer is segmented into strip, ring, or quadrangular segments, arranged at distances along and around the bottle axis, with connecting layers of polyester resin binding the segments, reducing the surface area and preventing delamination.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a continuous gas barrier resin layer is used between inner and outer polyester layers, then oxygen impermeability and gas barrier properties are improved, but delamination occurs between layers causing appearance deterioration
Solution Approach 1:
The gas barrier resin layer is divided into multiple discrete segments arranged in a circumferential direction around the bottle. Each segment is separated by gaps where the inner and outer polyester layers directly contact and bond to each other, creating anchoring points that prevent delamination while maintaining gas barrier effectiveness.
2Reliability
If the gas barrier resin layer covers the entire bottle surface, then oxygen absorption and carbon dioxide permeation prevention are maximized, but the risk of delamination increases
Solution Approach 1:
The gas barrier resin layer is segmented into multiple discrete portions arranged circumferentially around the bottle. The gaps between segments allow direct bonding between inner and outer polyester layers, creating anchor zones that prevent delamination while the distributed segments maintain overall gas barrier and oxygen absorption properties.
Solution Approach 2:
Different regions of the bottle have different structures: areas with gas barrier segments provide oxygen impermeability and absorption, while the gap areas between segments provide strong layer bonding. This local differentiation allows each region to fulfill its specific function optimally.
Data Source
AI summary
A laminated bottle 30 with a gas barrier resin layer 3 arranged between polyester resins layers m is provided. The gas barrier resin layer 3 comprises a plurality of quadrangular segments with two sides extending along the bottle axis O and two sides extending around the bottle axis O, wherein the segments are arranged at a distance C1, C2 to each other via connecting layers m3, m4 which connect the inner layer m1 and the outer layer m2.