Resilient Carpet Seam Tape to Prevent Seam Peaking
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Solution Overview
Problem
Existing carpet seam tapes cause unsightly bulging or 'seam peaking' when carpet segments are stretched due to their inelastic nature, which is not compatible with the stretching of the carpet, leading to an undesirable appearance.
Innovation Solution
A resilient seam tape with an elongated base layer made of materials like cotton and elastane, combined with a hot-melt thermoplastic adhesive applied to an intervening layer, which allows for stretching without lifting off the floor, and optionally includes a polymer adhesive as a sealant to prevent adhesive seepage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If inelastic seam tape is used to join carpet segments, then the seam tape provides structural strength and stability, but the seam lifts off the floor and creates unsightly bulges when the carpet is stretched
Solution Approach 1:
The base layer material is changed from inelastic (paper or woven scrim) to elastic (spandex, lycra, or rubber-containing fabric), fundamentally altering the mechanical properties of the seam tape to enable stretching without lifting
Solution Approach 2:
The seam tape is constructed as a composite with an elastic fabric base layer combined with thermoplastic adhesive, creating a material that兼具 structural strength and elasticity to prevent seam peaking while maintaining bond strength
2Shape
If elastic materials are used in the base layer to prevent seam peaking, then the seam remains flat during carpet stretching, but the manufacturing process becomes more complex
Solution Approach 1:
The invention discards the traditional woven scrim structure entirely, using only elastic fabric materials that are simpler to manufacture and apply, eliminating the complexity of embedding scrim in adhesive while achieving better performance
3Strength
If thermoplastic adhesive is applied to the base layer, then the adhesive bonds strongly to carpet segments when heated, but the adhesive may seep into pores of the base layer reducing effectiveness
Solution Approach 1:
A sealant layer is introduced as an intermediary between the porous elastic base layer and the thermoplastic adhesive, preventing adhesive seepage into the base layer pores while allowing the adhesive to maintain strong bonding to the carpet segments
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 solution prevents seam peaking by allowing the carpet to stretch without lifting the seam off the floor, providing a secure and aesthetically pleasing bond that withstands repeated steam cleaning and is easier to manufacture without a scrim.
Implementation Method 1
The adhesive typically comprises a hot-melt thermoplastic adhesive applied to a large portion of the base layer. The scrim is embedded within the adhesive.
Implementation Method 2
The base layer may comprise textile or fabric. The textile or fabric may comprise cotton and elastane. The textile or fabric may comprise denim and elastane.
Data Source
AI summary
A method for joining two carpet segments, each carpet segment having an underside and at least one edge, comprises abutting one edge of one carpet segment with one edge of the other carpet segment, positioning a length of seam tape under the abutting edges, and activating the adhesive to secure the seam tape to the undersides of both carpet segments. The seam tape comprises an elongated base layer being resilient in a transverse direction, an intervening layer applied to the base layer, and an adhesive applied to the intervening layer.