Tacky Polymer Protrusions Prevent Adhesion Clustering

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Solution Overview

Problem

Tacky polymer bodies tend to cluster and stick together, posing challenges in assembly and manufacturing processes, as existing solutions like adding powders or mechanical separation are not fully effective.

Innovation Solution

Incorporating one or more protrusions on the exterior surface of tacky polymer bodies to reduce the contact surface area between adjacent bodies, thereby decreasing the adhesive force to less than the force of gravity, preventing adhesion.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Ease of manufacture

If a substantially flat exterior surface is used on tacky polymer bodies, then manufacturing and handling is simplified, but the bodies tend to adhere to each other forming clusters

Engineering Contradiction:
Improvemanufacturing simplicityVSAvoidadhesion between bodies
Core Design Contradiction:
Ease of manufactureVSObject-generated harmful factors

Solution Approach 1:

The patent applies local quality by modifying only specific locations on the polymer body surface rather than changing the entire surface. Protrusions are added at discrete locations on the substantially flat exterior surface, creating localized non-contact regions that prevent adhesion while preserving the overall flat surface characteristics for manufacturing simplicity.

Inventive Principle:
Principle #3Local quality

Solution Approach 2:

The patent segments the contact surface by introducing protrusions that divide the continuous flat surface into separate contact and non-contact regions. This segmentation reduces the effective contact area between adjacent polymer bodies, preventing the formation of clusters while maintaining the simplified flat surface geometry.

Inventive Principle:
Principle #1Segmentation

2Object-generated harmful factors

If powder or lubricant is added to reduce tackiness, then adhesion between bodies is reduced, but the process complexity and contamination increase

Engineering Contradiction:
Improveadhesion between bodiesVSAvoidprocess complexity
Core Design Contradiction:
Object-generated harmful factorsVSDevice complexity

Solution Approach 1:

The patent extracts the need for external additives by incorporating the anti-adhesion function directly into the polymer body structure through protrusions. This eliminates the requirement for powder or lubricant additives, simplifying the manufacturing process and avoiding contamination issues associated with external substances.

Inventive Principle:
Principle #2Taking out (Extraction)

Solution Approach 2:

The protrusions provide self-service anti-adhesion functionality inherent to the polymer body design. The geometric features automatically prevent adhesion through reduced contact area without requiring external agents or additional processing steps, making the solution self-contained and process-simple.

Inventive Principle:
Principle #25Self-service

3Object-generated harmful factors

If mechanical or manual separation is used to separate clustered bodies, then adhesion is overcome, but time and labor requirements increase

Engineering Contradiction:
Improveadhesion between bodiesVSAvoidseparation time
Core Design Contradiction:
Object-generated harmful factorsVSLoss of time

Solution Approach 1:

The patent applies preliminary anti-action by pre-configuring the polymer bodies with protrusions that prevent adhesion before clustering can occur. This proactive design feature eliminates the need for subsequent mechanical or manual separation operations, saving time and labor in manufacturing and handling processes.

Inventive Principle:
Principle #9Preliminary anti-action

Solution Approach 2:

The protrusions are incorporated into the polymer body design during manufacturing, performing the anti-adhesion function in advance. This preliminary action prevents the formation of clusters that would otherwise require time-consuming separation processes, streamlining the overall manufacturing workflow.

Inventive Principle:
Principle #10Preliminary action

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 protrusions effectively reduce the adhesive force between polymer bodies, allowing them to separate even when agitated, improving handling and assembly processes by ensuring they do not stick together.

Implementation Method 1

the adhesive force between the one or more protrusions and the substantially-flat exterior surface is less than the force of gravity on the first polymer body

Methodology Applied
Scientific EffectAdhesive force: Adhesive

Implementation Method 2

the adhesive force between the one or more protrusions and the substantially-flat exterior surface is less than the force of gravity on the first polymer body

Methodology Applied
Scientific EffectForce of gravity: Gravitation

Data Source

PatentEP2683536B1Method for reducing adhesion between polymer bodies
Publication Date: 2019.04.03 BECTON DICKINSON & CO
  • EP2683536B1 patent drawingFigure 1~2
  • EP2683536B1 patent drawingFigure 3
  • EP2683536B1 patent drawingFigure 4~5

AI summary

A device is disclosed that includes a first polymer body (20, 30) having tacky properties. The first polymer body (20, 30) has a substantially- flat exterior surface (22). One or more protrusions (24, 34) are disposed on the substantially- flat exterior surface (22) of the first polymer body. When the one or more protrusions (24, 34) are in contact with a substantially- flat exterior surface (22) of a second polymer body (26) having tacky properties, the adhesive force between the one or more protrusions (24, 34) and the substantially- flat exterior surface (22) is less than the force of gravity on the first polymer body.