Colored Metal Fastener Elements Surface Roughening Paint Adhesion
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Solution Overview
Problem
Metal slide fastener elements with painted surfaces tend to chip and wear quickly due to friction and abrasion, leading to a deterioration in aesthetic appearance.
Innovation Solution
A method involving preliminary surface roughening of metal elements, followed by application of an anti-corrosion layer, a paint layer, and attachment to a tape, which enhances durability and color retention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If paint is applied to metal slide fastener elements, then aesthetic appearance is improved, but paint durability deteriorates due to chipping and wear from friction and abrasion
Solution Approach 1:
The patent applies preliminary surface roughening treatment to the metal elements before painting. This creates a textured surface that mechanically interlocks with the paint layer, preventing paint chipping and wear during subsequent use. The roughening is performed as a preliminary step before paint application, establishing a durable bond between the metal substrate and coating.
Solution Approach 2:
The patent creates a composite structure consisting of the metal element substrate combined with a paint layer. This composite construction allows the metal to provide structural strength while the paint layer provides aesthetic appearance, with the roughened interface ensuring strong adhesion between the two materials to prevent delamination and wear.
2Reliability
If surface roughening is applied to metal elements, then paint adhesion is improved, but surface smoothness deteriorates
Solution Approach 1:
The surface roughening treatment is applied as a preliminary step before painting, creating a textured substrate that enhances paint adhesion. The roughening process modifies the surface topology to provide mechanical interlocking, while subsequent painting covers the rough texture to restore visual smoothness in the finished product.
Solution Approach 2:
The roughening treatment is applied selectively to the surface regions that will receive paint coating, creating localized surface modifications only where needed for adhesion. The bulk material properties and overall shape remain unchanged, while only the surface layer undergoes roughening to improve bonding characteristics.
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 method results in more durable and long-lasting colored metal elements with improved aesthetic appeal by preventing paint wear and maintaining color integrity under constant use.
Implementation Method 1
The preliminary surface roughening process includes a step of blasting
Data Source
AI summary
This method for producing a slide fastener stringer having a colored metal element involves: forming a plurality of slide fastener elements fabricated from a metal material; preliminarily performing a surface-roughening treatment on the elements; forming one or more corrosion resistance layers on one or more roughened surfaces of the elements; forming one or more coating layers for covering the corrosion resistance layers; and attaching the teeth to a tape.