Polyolefin Elastomer Filled Composition for Radiation Shielding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing radiation-blocking garments face premature failure due to high strain and abrasion, leading to holes and tears, which compromise their ability to shield against X-rays effectively.
Innovation Solution
A filled composition comprising a polyolefin elastomer or copolymer with metal-containing fillers such as antimony, tungsten, or bismuth, combined with additives like paraffinic oil, provides enhanced radiation shielding, abrasion resistance, and flexibility, forming a durable sheet for protective garments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If radiation-blocking garments use traditional filled compositions, then radiation shielding is provided, but the garments suffer premature failure due to high strain and abrasion
Solution Approach 1:
The patent applies composite materials by combining polyolefin elastomer or copolymer with metal-containing fillers (antimony, tungsten, bismuth) and additives (paraffinic oil, compatibilizers, adhesion promoters). This composite structure provides both radiation shielding from metal fillers and enhanced mechanical strength from the polymer matrix, resolving the contradiction between radiation protection and resistance to strain/abrasion that causes premature failure.
Solution Approach 2:
The patent changes the chemical composition parameters of the filled composition by selecting specific polymers (polyolefin elastomer with vinyl monomers having 4-10 carbon atoms) and optimizing the ratio of polymer ingredient (5-30 wt%) to metal filler (70-95 wt%). These parameter changes improve both the mechanical properties for strain resistance and the radiation shielding capability, thereby extending garment lifespan.
2Reliability
If the composition uses high metal filler content for radiation shielding, then radiation blocking efficiency improves, but mechanical flexibility and durability deteriorate
Solution Approach 1:
The patent optimizes the parameter of metal filler content within a specific range (70-95 wt%) rather than using maximum possible content. This parameter change maintains effective radiation shielding while preventing excessive brittleness. The specific selection of polyolefin elastomer with vinyl monomers (4-10 carbon atoms) further adjusts the mechanical properties to balance flexibility and durability.
Solution Approach 2:
The patent introduces intermediary substances including compatibilizers and adhesion promoters that mediate between the metal filler particles and the polymer matrix. These intermediaries improve the interfacial bonding and stress distribution, allowing high metal filler content for radiation shielding while maintaining mechanical flexibility and durability through enhanced interfacial adhesion.
3Ease of manufacture
If traditional polymer compositions are used, then processing is simple, but the material shows poor resistance to environmental stress cracking
Solution Approach 1:
The patent uses a composite material system consisting of polyolefin elastomer or copolymer as the base polymer, which inherently provides better environmental stress cracking resistance compared to traditional rigid polymers. The addition of metal fillers and specific additives enhances this resistance while maintaining processing feasibility through standard extrusion and molding techniques.
Solution Approach 2:
The patent changes the polymer composition parameters by selecting polyolefin elastomer or copolymer with specific vinyl monomer content (5-30 wt%) and molecular weight characteristics. These parameter changes improve the polymer's inherent resistance to environmental stress cracking while maintaining ease of manufacture through conventional processing methods and temperature ranges.
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 significantly extends the lifespan of radiation-blocking garments by offering superior radiation shielding, flexibility, and resistance to environmental stress cracking, ensuring effective protection for over two years with improved mechanical properties.
Implementation Method 1
A filled composition for blocking radiation such as X-rays
Data Source
Figure 1A~1C
Figure 2A~2B
Figure 3A~3B
AI summary
A filled composition for radiation shielding includes at least one polymer ingredient and at least one metal-containing filler. The at least one polymer ingredient is selected from the group consisting of a polyolefin elastomer, a polyolefin co-polymer, a polyolefin ter-polymer, and a combination thereof. The polyolefin elastomer, the polyolefin co-polymer, or the polyolefin ter-polymer includes monomer units derived from ethylene and at least one vinyl monomer having more than three carbon atoms. The at least one metal-containing filler is selected from a metal filler, a metal compound or a combination thereof.