Ovenable Tray Liner Structure for Adhesion and Easy Peel Separation
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Solution Overview
Problem
Fiber-based trays with high temperature resistant polymer liners face challenges in adhering to the fiber component without additional adhesives and separating easily after use, as the liners tend to be difficult to remove and separate from the fiber component.
Innovation Solution
A polymeric based liner with specific layer configurations, including an exterior polyester layer and an interior polyolefin layer, is used, which can be easily adhered to the fiber-based component without additional adhesives and remains connected during oven exposure, allowing for manual separation post-use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If high temperature resistant polymer liners (polyester, polyamide) are used in fiber-based trays, then the liner can withstand oven temperatures, but the liner becomes difficult to adhere to the fiber component and requires additional adhesive components
Solution Approach 1:
The patent applies composite materials by creating a multi-layer polymeric liner structure where different polymer layers work together. The exterior polyester layer provides heat resistance while the interior polyolefin layer provides adhesion to the fiber-based tray, eliminating the need for separate adhesive components.
Solution Approach 2:
The patent applies local quality by assigning different functional properties to different layers of the polymeric liner. The exterior layer is designed for high temperature resistance while the interior layer is designed for adhesion, allowing each layer to optimize its specific function within the composite structure.
2Reliability
If high temperature resistant polymer liners are adhered to fiber-based components, then the liner survives oven temperatures, but the liner becomes difficult to remove from the fiber component
Solution Approach 1:
The patent applies parameter changes by carefully controlling the adhesion parameters of the polymeric liner. The liner is designed to adhere strongly at room temperature and during oven heating, but the adhesion strength decreases at higher temperatures or when exposed to moisture, allowing for easy manual separation after use.
Solution Approach 2:
The patent applies dynamics by creating a liner with dynamic adhesion properties that change under different conditions. The liner maintains strong adhesion during the cooking process but becomes easier to separate after cooling, allowing for convenient removal and recycling.
3Object-affected harmful factors
If polyethylene coated fiber-based trays are used, then the tray achieves moisture resistance and sealing properties, but the tray lacks high temperature resistance for oven applications
Solution Approach 1:
The patent applies composite materials by replacing simple polyethylene coating with a multi-layer polymeric liner structure. This composite structure combines polyester for heat resistance with polyolefin for moisture resistance and adhesion, achieving both protective functions simultaneously.
Solution Approach 2:
The patent applies universality by designing the polymeric liner to perform multiple functions: moisture barrier, grease barrier, heat resistance, and adhesion to the fiber-based tray. This single component replaces multiple separate protective layers.
Data Source
AI summary
An ovenable tray composite comprises a polymeric based liner and a fiber based component. The polymeric based liner incorporates polyolefin materials for performance in both adhesion (during use) and separation (for disposal) from the fiber based component, as well as high temperature resistant polymers that allow for the entire tray composite to be ovenable. Packages made from the lined trays described herein can be used for packaging food items intended to be heated for cooking or reheating the contents.