Cellulose-Fiber Polyolefin Composite Abrasion Resistance
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Solution Overview
Problem
Polyolefin resin products exhibit poor abrasion resistance when used in frictional environments, and existing solutions involve expensive resin components, leading to high production costs.
Innovation Solution
A cellulose-fiber-dispersing polyolefin resin composite material is developed, where cellulose fibers are uniformly dispersed in a polyolefin resin at specific ratios, enhancing abrasion resistance while reducing raw material costs through melt kneading in the presence of water.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If expensive resin components (high-molecular weight polyethylene, polyphenylene ether) are incorporated to improve abrasion resistance, then abrasion resistance is improved, but production cost increases
Solution Approach 1:
The patent replaces expensive resin components (high-molecular weight polyethylene, polyphenylene ether) with inexpensive cellulose fiber as the reinforcing additive. Cellulose fiber is a readily available, low-cost material that provides the necessary abrasion resistance without the high material costs associated with engineered polymers like polyphenylene ether or specialized polyethylene grades.
Solution Approach 2:
The patent creates a composite material by combining polyolefin resin with cellulose fiber in specific proportions (0.1-50 wt% cellulose fiber). This composite structure leverages the toughness and flexibility of polyolefin while incorporating the hardness and wear resistance of cellulose fiber, achieving superior abrasion resistance at lower cost than using expensive engineered resins alone.
2Reliability
If cellulose fiber content is increased to improve abrasion resistance, then abrasion resistance improves, but mechanical strength may deteriorate
Solution Approach 1:
The patent optimizes the cellulose fiber content parameter within a specific range (0.1-50 wt%, preferably 1-20 wt%). This parameter optimization ensures sufficient cellulose fiber is present to provide abrasion resistance while maintaining enough polyolefin resin to preserve mechanical strength, flexibility, and processability. The specific range prevents both insufficient wear resistance and excessive brittleness.
Solution Approach 2:
The patent ensures uniform dispersion of cellulose fiber throughout the polyolefin resin matrix, creating consistent local properties throughout the material. This uniform distribution prevents weak points and ensures that the reinforcement effect is evenly distributed, maintaining overall mechanical strength while providing abrasion resistance throughout the entire component.
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 material achieves excellent abrasion resistance and improved mechanical strength, suitable for use in abrasive environments, while maintaining cost-effectiveness by utilizing cost-effective cellulose fibers and polyolefin resins.
Implementation Method 1
when a mixture including a polyolefin resin and cellulose fibers at a particular ratio is melt kneaded in the presence of water, the cellulose fibers can be uniformly dispersed in the polyolefin resin
Data Source
AI summary
A cellulose-fiber-dispersing polyolefin resin composite material, containing a polyolefin resin and a cellulose fiber dispersed in the polyolefin resin, in which the composite material contains the cellulose fiber of 3 mass % or more and less than 70 mass %, and when the composite material is subjected to the abrasion test according to ISO 6722 under the following test conditions, the amount of abrasion after 5,000 reciprocations satisfies the [Formula 1]: (Amount of abrasion [mm] of the cellulose-fiber-dispersing polyolefin resin composite material)<−0.003×(Cellulose effective mass ratio of the cellulose-fiber-dispersing polyolefin resin composite material)+0.3,[Test Conditions for Abrasion Test]Load: 1.7 kg, Needle diameter: φ0.45 mm, Stroke length: 10 mm, Period: 60 reciprocations/min, Test piece: length 38 mm×width 6 mm×thickness 1 mm, Temperature: 23° C.