Heat-Shrinkable Film Pouch With Isolated Handle For Coil Packaging
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Solution Overview
Problem
Existing packaging solutions for filamentary materials, such as coils, fail to maintain a functional handle while ensuring the coil is tightly contained, as heat-shrinkable materials shrink when exposed to heat, compromising the handle's integrity.
Innovation Solution
A container/package design utilizing a heat-shrinkable film pouch with a folded end and a hand-hold cutout, where the handle portion is isolated from the heat source, allowing it to retain its form while the pouch shrinks around the coil.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the entire pouch including handle is exposed to heat for shrinking, then the pouch tightly contains the coil, but the handle shrivels and loses functionality
Solution Approach 1:
The pouch is divided into two distinct zones: a heat-exposed zone for shrinking and containment, and a heat-isolated zone for the handle to maintain its original form and functionality. This spatial segmentation allows different thermal treatments for different functional requirements.
Solution Approach 2:
Different thermal properties are applied to different parts of the pouch. The pouch body is designed to be heat-shrinkable for tight containment, while the handle area is protected from heat to maintain its structural integrity and usability. This local differentiation of thermal exposure resolves the contradiction between containment and handle functionality.
2Stability of the object's composition
If heat-shrinkable material is used to contain the coil, then tight containment is achieved, but the handle material shrinks when exposed to heat
Solution Approach 1:
The handle area is extracted from the heat treatment process by positioning it away from the heat source during the shrinking operation. This allows the handle to be taken out of the thermal field that causes shrinking, preserving its original shape while the rest of the pouch shrinks for tight coil containment.
Solution Approach 2:
The spatial arrangement of the pouch and heat source creates an intermediary thermal environment where different regions experience different temperatures. The handle zone acts as a protected region shielded from the direct heat exposure that causes shrinking in other areas, allowing simultaneous achievement of tight containment and shape preservation.
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 solution effectively maintains a functional handle and securely contains the coil, preventing the handle from shrinking, thus enabling easy handling and storage of filamentary materials.
Implementation Method 1
heat is applied to the pouch of the package, thus shrinking the film around the coil
Implementation Method 2
The handle portion of the package is isolated from the heat and is prevented from shrinking
Data Source
AI summary
A container/package of filamentary material wound in a coil and encased in heat shrinkable film with a payout tube extending through a payout hole in the container/package, the heat shrinkable film is formed as a pouch having an open end into which the coil is inserted; one end of the shrink wrap material is folded back on itself to form a hand-held cutout; the open end of the pouch is sealed and the shrunk wrap material is heated to seal the coil in the shrunk wrap material while isolating the hand-hold cutout; and the container/package is thus formed with a heat shrunk pouch tightly containing the coil of filamentary material and an attached portion not exposed to heat and not shrunk.