Composite Sanding Belt Base with High Elongation Textile Reinforcement
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Solution Overview
Problem
Conventional paper-based sanding belts suffer from inadequate tear resistance, leading to premature failure during use, particularly at the edge zones, due to insufficient reinforcement against tensile and shear loads.
Innovation Solution
A composite base is created with a paper base and a textile fabric where the textile fabric's basis weight is 30% or less of the paper base, and its elongation at break is at least 35% transverse to the intended working direction, allowing for flexible deformation and reduced stress on individual threads, thereby enhancing tear resistance with a minimal amount of reinforcing material.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If a heavily dimensioned fabric is used to ensure adequate tear protection, then tear resistance is improved, but the proportion of textile reinforcing material increases significantly
Solution Approach 1:
The patent changes the key parameter of the textile fabric from basis weight to elongation at break. By specifying that the fabric must have an elongation at break of at least 35% transverse to the working direction, the patent enables the use of lighter fabrics (30% or less of paper base weight) that can still provide adequate tear resistance through elastic deformation and energy absorption during tearing events.
Solution Approach 2:
The patent creates a composite base combining paper and textile fabric with specific property ratios. The paper base provides dimensional stability and surface quality, while the lightweight textile fabric with high elongation provides tear resistance. This composite structure achieves superior tear protection with minimal textile material by leveraging the complementary properties of both materials.
2Quantity of substance
If a lightweight textile fabric with high elongation is used, then the proportion of textile reinforcing material is reduced, but adequate tear protection must still be maintained
Solution Approach 1:
The patent shifts the performance criterion from basis weight to elongation at break (at least 35%). This parameter change allows lightweight fabrics to provide adequate tear protection through elastic deformation and energy absorption during tearing, rather than relying on high basis weight for mechanical strength.
Solution Approach 2:
The patent applies textile fabric reinforcement selectively at the edge zones where tearing typically initiates, rather than uniformly throughout the entire sanding belt. This localized reinforcement approach uses minimal textile material while providing tear protection where it is most needed.
3Stability of the object's composition
If conventional paper bases are used for sanding belts, then high surface quality and dimensional stability are achieved, but tear resistance remains inadequate
Solution Approach 1:
The patent combines paper base (providing dimensional stability and surface quality) with textile fabric (providing tear resistance through high elongation). The paper base maintains its excellent dimensional stability and surface properties, while the textile overlay compensates for the paper's inadequate tear resistance, creating a composite with all desired properties.
Solution Approach 2:
The patent merges paper and textile fabric into a composite base structure where each material contributes its superior properties. The paper provides dimensional stability and surface quality, while the textile fabric with at least 35% elongation provides tear resistance, creating a synergistic combination that overcomes the limitations of either material alone.
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 composite base significantly improves tear resistance and extends the durability of sanding belts by distributing load peaks across multiple threads, reducing the risk of tearing and enhancing force absorption, while maintaining high surface quality and dimensional stability.
Implementation Method 1
the threads can detach from the base before they tear. As a result, forces are absorbed by a large number of threads and load peaks for individual threads are reduced
Implementation Method 2
the textile fabric is glued plastically or elastically, which is why it can be moved on the paper base
Implementation Method 3
The connection between the paper base and the textile fabric is made flat, preferably over the entire surface
Data Source
Figure 1~3
Figure 4
AI summary
The invention relates to a composite backing for abrasives, comprising a paper backing and a textile fabric connected thereto. According to the invention, the basis weight of the textile fabric is 30% or less than the basis weight of the paper backing; and the elongation at break of the textile fabric transverse to the intended working direction of the composite backing is at least 35%.