Buffing Dust Polystyrene Composite Thermal Insulator
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Solution Overview
Problem
The leather tannery industry generates significant environmental pollution due to large amounts of waste, including buffing dust, and existing thermal insulation materials like polystyrene are non-biodegradable, necessitating a sustainable alternative with improved thermal insulation properties.
Innovation Solution
A polymer composite is created by mixing buffing dust waste with polystyrene in a twin-screw extruder and compressing the mixture, resulting in a thermal insulator with low thermal conductivity and high mechanical properties, suitable for building insulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If polystyrene is used as thermal insulation material, then thermal insulation properties are achieved, but environmental pollution and non-biodegradability occur
Solution Approach 1:
The patent recovers buffing dust waste from leather tanneries by incorporating it into polystyrene thermal insulation composites. The buffing dust, which would otherwise be discarded as harmful waste, is recovered and utilized as a filler material, transforming it from an environmental pollutant into a beneficial component of sustainable insulation products.
Solution Approach 2:
The patent creates composite materials by combining polystyrene with buffing dust waste particles. This composite approach allows the integration of waste material into a functional product, achieving both thermal insulation properties and environmental sustainability through the synergistic combination of polymer matrix and waste filler.
2Object-generated harmful factors
If buffing dust waste is incorporated into polystyrene composite, then environmental sustainability is improved, but thermal conductivity may increase
Solution Approach 1:
The patent optimizes the particle size parameters of buffing dust waste (0.1-2.0 mm) and controls the composition ratio (5-20% by weight) to achieve optimal thermal insulation performance. By carefully adjusting these parameters, the composite maintains low thermal conductivity while effectively utilizing waste material.
Solution Approach 2:
The patent utilizes the porous structure of buffing dust waste particles within the polystyrene matrix to maintain thermal insulation properties. The void spaces between the waste particles create air pockets that reduce thermal conduction, while the porous structure itself provides mechanical integrity to the composite material.
3Object-generated harmful factors
If buffing dust particles are added to polystyrene, then waste utilization increases, but mechanical strength may decrease
Solution Approach 1:
The patent optimizes the particle size of buffing dust waste (0.1-2.0 mm) and controls the composition ratio (5-20% by weight) to maintain mechanical strength. By adjusting these parameters, the composite achieves optimal balance between waste utilization and structural integrity, preventing excessive weakening while maximizing sustainability benefits.
4Object-generated harmful factors
If polystyrene production is reduced, then environmental friendliness improves, but thermal insulation performance may deteriorate
Solution Approach 1:
The patent develops composite materials that replace pure polystyrene with polystyrene-buffing dust composites. These composites maintain or improve thermal insulation properties while reducing the need for virgin polystyrene production, thereby achieving both environmental friendliness and thermal performance through material composition rather than quantity reduction 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 buffing dust waste/polystyrene composite exhibits extremely low thermal conductivity (0.0447 W/m-K) and maintains high mechanical properties, making it an effective and sustainable thermal insulation material for buildings while addressing environmental waste issues.
Implementation Method 1
mixing the buffing dust with the polystyrene polymer in a twin-screw extruder
Implementation Method 2
The mold is heated and compressed in a hot press machine, e.g., at 500 kg force at 180° C. for 20 minutes
Implementation Method 3
The mold is heated and compressed in a hot press machine, e.g., at 500 kg force at 180° C. for 20 minutes
Implementation Method 4
Polystyrene and polystyrene composites are frequently used in building materials, particularly for thermal insulation
Data Source
AI summary
The buffing dust waste/polystyrene thermal insulator is a polymer composite containing 0.1%-25% by weight buffing dust waste from a leather tannery, the balance being polystyrene. The composite has extremely low thermal conductivity (e.g., 0.0447 W/m-K for a composite 10% budding dust by weight), making it a good insulator, while still having relatively high mechanical properties. The thermal insulator is made by mixing the buffing dust with the polystyrene polymer in a twin-screw extruder and pouring the mixture into a steel mold. The mold is heated and compressed in a hot press machine, e.g., at 500 kg force at 180° C. for 20 minutes, which may be followed by 500 kg force at 125° C. for an additional 20 minutes. The resulting composite polymer is suitable for use as thermal insulation in buildings.