Biodegradable Coated Abrasive Using Water-Soluble Polyester Binder
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Solution Overview
Problem
Most coated abrasive products are made with thermoset synthetic binders that are neither recyclable nor biodegradable, leading to environmental concerns as they are typically disposed of in landfills or incinerated at the end of their life cycle.
Innovation Solution
Development of coated abrasive articles using a biodegradable, non-toxic, water-soluble crosslinked polyester binder that can be recycled by dissolution in hot water, replacing traditional thermoset synthetic materials.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional thermoset synthetic binders are used in coated abrasive articles, then the abrasive performance and structural stability are maintained, but the environmental friendliness and biodegradability deteriorate
Solution Approach 1:
The patent changes the chemical composition parameters of the binder from traditional thermoset synthetic materials to water-soluble crosslinked polyester, altering the molecular structure to enable water solubility while maintaining crosslinked network formation for structural integrity. This parameter change allows the binder to dissolve in water after use, enabling biodegradation and reducing environmental impact while preserving abrasive performance during service.
Solution Approach 2:
The patent creates a composite binder system combining water-soluble polyester chains with crosslinking agents that form a three-dimensional network. This composite structure provides both the mechanical strength needed for abrasive application and the water-soluble characteristics for environmental friendliness. The crosslinked polyester composite maintains structural stability during use but can be broken down by water, resolving the contradiction between performance and biodegradability.
2Object-affected harmful factors
If biodegradable water-soluble binders are used in coated abrasive articles, then the environmental friendliness and recyclability are improved, but the binder strength and retention of abrasive particles may deteriorate
Solution Approach 1:
The patent applies preliminary crosslinking action to the water-soluble polyester binder before the abrasive article is put into service. The crosslinking process creates strong bonds between polyester chains that provide immediate binder strength and secure abrasive particle retention during manufacturing and initial use. This preliminary structural reinforcement ensures the binder can withstand abrasive forces while maintaining its inherent water-soluble nature for eventual biodegradation.
Solution Approach 2:
The patent creates a dynamic binder system where the crosslinked polyester network transitions from a rigid, strength-providing structure during use to a soluble, biodegradable form after service. The crosslinks provide mechanical strength when needed, but the water-soluble polyester backbone allows the structure to break down when exposed to water after the abrasive article has completed its function, enabling dynamic adaptation between strength and biodegradability states.
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 use of water-soluble crosslinked polyester binders allows for the creation of coated abrasive products that can be recycled or biodegraded, reducing environmental impact while maintaining effective abrasive performance.
Implementation Method 1
a biodegradable, non-toxic polyester binder that is water-soluble, even after cross-linking
Implementation Method 2
biodegradable thermoset resin
Data Source
AI summary
A coated abrasive article comprises a backing having a major surface and an abrasive layer disposed on and secured to at least a portion of the major surface of the backing. The abrasive layer comprises a binder material at least partially retaining abrasive particles and comprising a first water-soluble crosslinked polyester. Methods of making the coated abrasive article are also disclosed.