Artificial turf and production method
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Solution Overview
Problem
Artificial turf surfaces face challenges in maintaining durability, resistance to mechanical wear, UV exposure, and environmental interactions while mimicking the appearance and feel of natural grass, with existing materials often requiring frequent maintenance and having limited longevity.
Innovation Solution
A method of manufacturing artificial turf fibers using a polymer mixture comprising immiscible polymers and a compatibilizer, which forms polymer beads that are stretched into thread-like regions, embedded within a second polymer, and incorporated into a backing material, enhancing elasticity and resilience, and potentially including additional additives for UV resistance and stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If artificial turf is made from traditional single-polymer materials, then the manufacturing process is simple, but the durability and resistance to mechanical wear are insufficient
Solution Approach 1:
The patent uses a composite polymer system consisting of a polyamide matrix with dispersed polyethylene beads, where the polyamide provides strength and wear resistance while the polyethylene beads provide elasticity and cushioning. This composite structure resolves the contradiction by combining materials with complementary properties to achieve both high durability and improved performance.
Solution Approach 2:
The patent creates local quality variations within the fiber by dispersing polyethylene beads throughout the polyamide matrix. Different regions of the fiber have different properties: the polyamide-rich regions provide strength and wear resistance, while the polyethylene bead regions provide elasticity and shock absorption. This local differentiation allows the single fiber to exhibit multiple desirable characteristics simultaneously.
2Duration of action of stationary object
If artificial turf fibers are made from highly durable materials, then the service life is extended, but the elasticity and resilience deteriorate
Solution Approach 1:
The polyamide-polyethylene composite fiber combines the high strength and durability of polyamide with the excellent elasticity and resilience of polyethylene. The polyethylene beads act as micro-springs that deform under load and rebound, providing continuous elasticity throughout the service life of the turf, thus resolving the contradiction between durability and elastic recovery.
Solution Approach 2:
The patent changes the physical state and distribution of polyethylene from a continuous matrix to discrete dispersed beads within the polyamide. This parameter change in material morphology allows the polyethylene to function as elastic cushions rather than structural support, maintaining resilience while the polyamide matrix ensures long-term durability.
3Reliability
If artificial turf is designed to withstand high mechanical wear and UV exposure, then the reliability is improved, but the maintenance requirements increase
Solution Approach 1:
The patent changes the chemical composition parameters by selecting polyamide and polyethylene, both of which have inherent resistance to UV degradation and environmental chemicals. This material parameter selection provides built-in reliability against environmental damage, reducing the frequency and complexity of maintenance activities.
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 resulting artificial turf fibers exhibit improved durability, elasticity, and resistance to mechanical wear, reducing maintenance needs and maintaining a natural grass-like appearance and feel over an extended period.
Implementation Method 1
The polymer mixture is at least a three-phase system... The first polymer and the second polymer are immiscible. The first polymer forms polymer beads surrounded by the compatibilizer within the second polymer.
Implementation Method 2
stretching the reheated monofilament to deform the polymer beads into thread-like regions and to form the monofilament into an artificial turf fiber... the polymer beads are stretched and elongated.
Data Source
AI summary
The invention provides for a method of manufacturing artificial turf (1000). The method includes creating a polymer mixture, such as polymer mixture (400), where the polymer mixture is at least a three-phase system. The polymer mixture includes a first polymer, a second polymer and a compatibilizer. The first polymer is a polyamide (PA) and the second polymer is a polyethylene (PE). The first polymer is included in an amount of 0.125 percent to 5 percent by weight, the second polymer is included in an amount of 60 percent to 97 percent by weight and the compatibilizer is included in an amount of 0.375 percent to 15 percent by weight. The first polymer and the second polymer are immiscible, and the first polymer forms polymer beads surrounded by the compatibilizer within the second polymer.