Propylene-Based Elastomer Carpet Backing for Flexibility and Low VOC
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional carpet backing layers face challenges with flexibility, low volatile organic compound (VOC) emissions, and aesthetic appeal, as rubber materials have high VOC emissions, long processing times, and are aesthetically unattractive, while polyolefins provide rigidity and poor transparency.
Innovation Solution
A carpet backing layer composition comprising blends of propylene-based elastomers with specific weight percentages and properties, including propylene-derived units and ethylene-derived units, achieving flexibility, low VOC emissions, and transparency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If rubber materials (nitrile butadiene rubber, styrene-butadiene rubber) are used in backing layers, then flexibility is achieved, but VOC emissions increase and processing time increases due to extended curing times
Solution Approach 1:
The patent changes the chemical composition parameters by using propylene-based elastomers with specific ethylene content (5-20 wt%) and specific flexural modulus values (40-70 MPa for the second elastomer), transforming the material properties to achieve flexibility without the harmful VOC emissions of conventional rubber materials
Solution Approach 2:
The patent creates a composite backing layer composition blending multiple propylene-based elastomers (first, second, third, and fourth elastomers in specific ratios) to achieve the desired flexibility while maintaining low VOC emissions and improved processing characteristics compared to single-material rubber formulations
2Ease of operation
If rubber materials are used in backing layers, then flexibility is achieved, but processing time increases due to extended curing times
Solution Approach 1:
The patent changes the material parameters by selecting propylene-based elastomers with specific flexural modulus ranges (40-70 MPa for the second elastomer) that provide flexibility without requiring extended curing times, unlike conventional rubber materials that need prolonged curing to achieve similar flexibility
Solution Approach 2:
The patent employs a thermoplastic propylene-based elastomer system that can be processed and set quickly without the need for extended curing periods characteristic of conventional rubber materials, enabling faster production cycles
3Object-generated harmful factors
If polyolefins are used in backing layers, then transparency and low VOC emissions are achieved, but flexibility is lost due to rigidity
Solution Approach 1:
The patent changes the physical parameters of polyolefin-based materials by selecting propylene-based elastomers with specific flexural modulus values (40-70 MPa for the second elastomer, 5-20 MPa for the third elastomer) that are low enough to provide flexibility while maintaining the transparency and low VOC emissions inherent to polyolefin chemistry
Solution Approach 2:
The patent creates a composite formulation blending four different propylene-based elastomers in specific proportions, where the combination of materials with different flexural modulus values (first elastomer: 350-450 MPa, second: 40-70 MPa, third: 5-20 MPa, fourth: high MFR) achieves the desired flexibility balance while maintaining transparency and low VOC emissions
4Illumination intensity
If polyolefins are used in backing layers, then transparency is achieved, but flexibility is lost due to rigidity
Solution Approach 1:
The patent changes the mechanical parameters by selecting propylene-based elastomers with specific flexural modulus ranges (particularly the second elastomer at 40-70 MPa and third elastomer at 5-20 MPa) that provide sufficient flexibility while maintaining the optical transparency characteristic of polyolefin materials
Solution Approach 2:
The patent develops a multi-component composite of propylene-based elastomers where the blend of materials with varying flexural modulus values (first: 350-450 MPa, second: 40-70 MPa, third: 5-20 MPa) creates a synergistic effect that achieves both transparency and flexibility simultaneously
Data Source
AI summary
This invention relates to carpet backing layer compositions including a blend of polyolefins (e.g., propylene-based elastomers) which have enhanced flexibility and good processability. Carpets including such backing layer compositions and methods of making such carpets are also provided.