Heat-Shrink Film Packaging for Record Rolls of Cover Tape

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Solution Overview

Problem

Existing methods for packaging record rolls of cover tape fail to prevent deformation and roll collapse due to environmental factors like temperature, humidity, and vibrations, especially for tapes with laminated structures, leading to instability during transport and storage.

Innovation Solution

Packaging record rolls of cover tape in a heat-shrink film and applying a specific pressure of at least 0.8 mN/mm2 to 1.2 mN/mm2 through thermal contraction of the heat-shrink film to maintain the rolled shape and prevent collapse.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If conventional packaging methods (multiple layers of packaging film and adhesive tape) are used, then the packaging process is completed, but the record rolls still deform and collapse under environmental factors during transport and storage

Engineering Contradiction:

Improvestability of rolled stateVSAvoidenvironmental factors (temperature, humidity, vibrations)

Core Design Contradiction:

ReliabilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies a specific pressure range (0.8-1.2 mN/mm²) to the record rolls during heat-shrink packaging. This parameter change in compression force prevents roll deformation and collapse while maintaining the rolled state stability under environmental factors during transport and storage.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent utilizes thermal contraction of heat-shrink film when heated. The film contracts around the record rolls, applying the necessary pressure (0.8-1.2 mN/mm²) to maintain roll shape and prevent collapse during transport and storage under various environmental conditions.

Inventive Principle:

Principle #37Thermal expansion

2Productivity

If heat-shrink packaging is applied to remove loose ends and reduce package volume, then packaging efficiency improves, but the record rolls still collapse under environmental changes

Engineering Contradiction:

Improvepackaging efficiencyVSAvoidroll shape stability

Core Design Contradiction:

ProductivityVSReliability

Solution Approach 1:

The patent specifies a precise pressure range (0.8-1.2 mN/mm²) that must be applied during heat-shrink packaging. This parameter control ensures both packaging efficiency (through volume reduction) and roll shape stability (by preventing collapse), resolving the contradiction between productivity and reliability.

Inventive Principle:

Principle #35Parameter changes

3Ease of manufacture

If cover tape with laminated structure is rolled into records, then the tape is ready for use, but gaps between layers allow air intake that causes expansion and contraction under temperature changes

Engineering Contradiction:

Improvetape readiness for useVSAvoidinternal air pressure stability

Core Design Contradiction:

Ease of manufactureVSStability of the object's composition

Solution Approach 1:

The patent applies external pressure (0.8-1.2 mN/mm²) to the rolled tape, which counteracts the internal pressure changes caused by air expansion and contraction in the gaps between laminated layers. This maintains the rolled shape stability despite temperature variations during storage and transport.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent applies pressure in advance during packaging to prevent the harmful effect of air expansion and contraction. By pre-compressing the rolls within the heat-shrink film, the structure is made resistant to subsequent temperature changes that would otherwise cause deformation.

Inventive Principle:

Principle #9Preliminary anti-action

4Reliability

If multiple layers of packaging and deaeration are applied, then the packaging is complete, but the process becomes complex and time-consuming

Engineering Contradiction:

Improvepackaging completenessVSAvoidpackaging process complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent combines multiple packaging functions into a single heat-shrink packaging step. The heat-shrink film simultaneously provides compression (applying 0.8-1.2 mN/mm² pressure), sealing, and environmental protection, eliminating the need for separate deaeration and multiple packaging layers, thus reducing process complexity while maintaining reliability.

Inventive Principle:

Principle #5Merging (Combining)

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

This method effectively prevents roll deformation and collapse in various environmental conditions, simplifying the packaging process and ensuring the stability of the rolled state during transport and storage.

Implementation Method 1

wrapping a roughly coaxial stack of record rolls in a heat-shrink film, and subjecting the heat-shrink film to thermal contraction, thereby applying a pressure of at least 0.8 mN/mm2 and at most 1.2 mN/mm2 to the record rolls

Methodology Applied

Scientific EffectThermal contraction: Thermal Contraction

Data Source

PatentUS8453421B2Method of packaging record rolls of cover tape and package

Publication Date: 2013.06.04 DENKA CO LTD

AI summary

The method for packaging together a plurality of record rolls of cover tape according to the present invention comprises wrapping a stack obtained by roughly coaxially stacking said record rolls in a heat-shrink film; and heat-shrinking said heat-shrink film, so that a pressure of at least 0.8 mN/mm2 and at most 1.2 mN/mm2 is applied between the record rolls. This method will not deform the rolled state after packaging, while suppressing the occurring of roll collapse when exposed to a high-temperature environment or a low-temperature environment.