Threadlike Adhesive Feeding With Guided Tension for Accurate Sticking

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Solution Overview

Problem

Existing adhesive sticking apparatuses struggle to accurately and smoothly apply threadlike adhesives without a release liner due to their strong self-adhesive force, leading to issues such as feeding difficulties and reduced sticking accuracy.

Innovation Solution

A threadlike adhesive sticking apparatus with an assist mechanism that applies an external force in the feeding direction and a pressing unit to smoothly feed and press the adhesive against an object, using rollers and a nozzle to manage tension and positioning.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Strength

If threadlike adhesive without release liner is used, then adhesive strength is improved, but feeding difficulty increases and sticking accuracy deteriorates

Engineering Contradiction:
Improveadhesive strengthVSAvoidfeeding ease
Core Design Contradiction:
StrengthVSEase of operation

Solution Approach 1:

A guide roller is introduced as an intermediary component between the adhesive reel and the sticking point. The guide roller applies controlled tension to the adhesive strand, preventing it from snapping back or tangling while maintaining the strong self-adhesive properties of the release liner-less adhesive. This mediator enables smooth feeding and accurate positioning without compromising adhesive strength.

Inventive Principle:
Principle #24Intermediary (Mediator)

2Strength

If threadlike adhesive without release liner is used, then adhesive strength is improved, but sticking accuracy deteriorates

Engineering Contradiction:
Improveadhesive strengthVSAvoidsticking accuracy
Core Design Contradiction:
StrengthVSManufacturing precision

Solution Approach 1:

The guide roller system provides real-time feedback on adhesive tension and positioning. By controlling the tension applied by the guide roller, the system ensures the adhesive is fed at the correct speed and position, maintaining sticking accuracy while preserving the strong adhesive properties of the release liner-less formulation.

Inventive Principle:
Principle #23Feedback

3Ease of operation

If adhesive tape with release liner is used, then feeding ease is improved, but adhesive strength deteriorates

Engineering Contradiction:
Improvefeeding easeVSAvoidadhesive strength
Core Design Contradiction:
Ease of operationVSStrength

Solution Approach 1:

The invention extracts and removes the release liner from the adhesive structure, using only the adhesive strand itself. This eliminates the need for a separate release liner while maintaining feeding ease through the guide roller tension control system. The adhesive strand is fed directly without the interfering presence of a release liner, achieving both strong adhesion and easy feeding.

Inventive Principle:
Principle #2Taking out (Extraction)

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

Enables smooth and accurate application of threadlike adhesives to any path, preventing peeling, cutting, and entanglement, while maintaining high sticking accuracy.

Implementation Method 1

since the threadlike adhesive wound without a release liner has a strong self-adhesive force, the threadlike adhesive cannot be successfully fed out

Methodology Applied
Scientific EffectSelf-adhesive force: Adhesive

Implementation Method 2

presses a threadlike adhesive wound around a winding body against an object while feeding out the threadlike adhesive

Methodology Applied
Scientific EffectAdhesive force: Adhesive

Data Source

PatentUS12365561B2Threadlike adhesive sticking apparatus and method of sticking threadlike adhesive
Publication Date: 2025.07.22 NITTO DENKO CORP
  • US12365561B2 patent drawing
  • US12365561B2 patent drawing
  • US12365561B2 patent drawing

AI summary

A threadlike adhesive sticking apparatus of the present invention is an adhesive sticking apparatus that presses a threadlike adhesive wound around a winding body against an object while feeding out the threadlike adhesive, and includes an assist mechanism configured to apply an external force in a feeding direction to the threadlike adhesive fed out from the winding body, and a pressing unit configured to press the threadlike adhesive fed out from the winding body against the object.