Loop-Ring Slip Tape for Weather Strips With Low Glass Friction
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Solution Overview
Problem
Conventional slip tapes for automobile weather strips have high friction coefficients, leading to annoying noise, durability issues, and peeling of fiber piles due to high friction and moisture absorption, with base films breaking under high extrusion forces.
Innovation Solution
A slip tape with a base film made of olefin-based resin, an adhesive layer, and a ring fabric layer of multifilament yarn forming circular loop-shaped rings to reduce friction, supported by flatly knitted lower rings, and optionally incorporating a flexible treatment layer and recessed rings for enhanced slip properties and durability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional flocking slip tape with upright fiber piles is used, then the slip tape can be manufactured and applied to weather strips, but the fiber piles have high friction coefficient causing annoying noise and durability reduction
Solution Approach 1:
The invention changes the surface geometry parameter of the slip tape from upright fiber piles to circular loop-shaped rings. This parameter change transforms the contact interface from rough cut surfaces to smooth circular surfaces, reducing the friction coefficient and eliminating noise generation while maintaining manufacturability through knitting processes.
Solution Approach 2:
The invention applies spheroidality by forming circular loop-shaped rings instead of straight upright fibers. The curved circular geometry allows smoother contact with the glass surface, reducing friction and noise compared to the linear cut surfaces of conventional fiber piles.
2Ease of operation
If conventional flocking slip tape is used, then the slip tape can contact the glass surface, but the fiber piles peel off the adhesive layer due to high friction and moisture absorption
Solution Approach 1:
The invention changes the structural parameter from upright fibers to circular loop rings, which distribute contact forces more evenly across the adhesive layer. The circular geometry prevents stress concentration at cut surfaces, reducing peeling forces and improving adhesion reliability under moisture and friction conditions.
Solution Approach 2:
The circular loop shape provides a curved contact interface that distributes mechanical stresses more uniformly compared to the sharp cut edges of conventional fibers. This curvature effect reduces stress concentration at the adhesive interface, preventing peeling and improving durability.
3Ease of manufacture
If base film made of olefin-based resin is used, then the slip tape can be manufactured, but the base film breaks due to high extrusion force and high-temperature conditions during extrusion molding
Solution Approach 1:
The invention creates a composite structure by combining the olefin-based resin base film with a ring fabric layer made of polyester or nylon. This composite construction provides the base film with enhanced strength and heat resistance through the reinforcement of the ring fabric layer, allowing the slip tape to withstand extrusion molding conditions while maintaining manufacturability.
Data Source
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AI summary
The present invention relates to a slip tape for an automobile weather strip, wherein a circular loop shaped-ring having a smooth outer surface is provided to form a low coefficient of friction, the occurrence of joints is appropriately prevented and minimized to improve slipperiness, and the loop-shaped ring is knitted to be caught therein so as to fundamentally prevent the escape of the ring. This slip tape comprises: a base film capable of being attached to the outer surfaces of an automobile door belt weather strip and door glass weather strip and made of an olefin resin; an adhesive layer formed by applying an adhesive to the upper surface of the base film; and a ring fabric layer having the lower surface attached to the upper surface of the adhesive layer, formed of multifilament yarns made of polyester or nylon, including a plurality of loop-shaped upper rings knitted on the upper surface thereof to protrude upward so as to be in tight contact with the outer surface of automobile glass, and including lower rings flatly knitted on the lower surface thereof such that the upper rings are caught and supported thereby.