Carpet comprising a non-woven structure with fibers catalyzed by a metallocene catalyst
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current recycling methods for multi-layer/multi-component plastics, such as carpets, face challenges due to contamination between incompatible polymers, leading to lower quality recycled materials and increased costs, making it difficult to produce recycled plastics of the same quality as virgin polymers.
Innovation Solution
A bonded and entangled non-woven structure for carpets, comprising at least 50% staple fibers with thermally activated bonds between a first polyolefin material produced with a metallocene catalyst and a second material with a higher melting point, allowing for partial bonding without pressure, resulting in a lightweight, recyclable, and high-stiffness carpet.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional multi-layer/multi-component plastics are used in carpets, then functional performance is improved, but recyclability deteriorates due to contamination between incompatible polymers
Solution Approach 1:
The patent applies homogeneity by using a single polymer material (polypropylene) for all fiber components in the carpet. The first and second polyolefin materials are both polypropylene, ensuring they are compatible and can be recycled together without contamination issues. This single-material approach maintains functional performance while enabling 100% recyclability.
2Ease of manufacture
If recycled plastic materials are used, then cost is reduced, but quality deteriorates due to contamination with each recycling cycle
Solution Approach 1:
The patent uses parameters (melting points) of the polyolefin materials to enable selective bonding. The first polyolefin material has a melting point of 130-170°C while the second has a melting point at least 10°C higher. This parameter difference allows thermal bonding at temperatures that activate the first material while keeping the second material intact, achieving both bonding functionality and recyclability without quality degradation.
3Ease of manufacture
If parts of carpet such as laminated materials or latexes are omitted, then recyclability is improved, but mechanical properties deteriorate
Solution Approach 1:
The patent applies self-service by incorporating bonding capability directly within the fiber structure itself. The bicomponent fibers contain two different polyolefin materials that can thermally bond to each other, eliminating the need for separate latex or laminated bonding layers. This internal bonding mechanism maintains mechanical strength while improving recyclability.
4Weight of moving object
If thermally activated bonds between polyolefin materials are used, then weight is reduced, but manufacturing complexity increases
Solution Approach 1:
The patent exploits phase transitions (melting) of the polyolefin materials to achieve bonding. The first polyolefin material melts at 130-170°C to form bonds with the second polyolefin material, which remains solid at this temperature. This phase transition approach enables bonding without additional complex equipment, using only temperature control to achieve the desired effect.
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 reduces weight and cost while maintaining mechanical performance, enables 100% recyclability, and achieves higher stiffness and abrasion resistance compared to conventional non-woven structures, with improved coverage and a lower carbon footprint.
Implementation Method 1
thermally activated bonds between a first polyolefin material produced with at least one catalyst being a metallocene catalyst and having a melting point in the range of 130-170°C and a second material having a melting point which is at least 10°C higher than the melting point of the first material
Data Source
Figure 1~2
Figure 3
AI summary
The present invention describes a bonded and entangled non-woven structure made of at least 50% staple fibers by weight of the bonded and entangled non-woven structure, and at least a partial bonding of the fibers of the non-woven structure, the at least partial bonding comprising thermally activated bonds between a first polyolefin material produced with a catalyst comprising at least one metallocene catalyst and having a melting point in the range 130-170°C and a second material having a melting point which is at least 10°C higher than the melting point of the first material, the weight of the first material in the non-woven structure being at least 3% of the weight of the nonwoven structure.