Ring Spun Cotton Polyester Yarn Defect Reduction
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Solution Overview
Problem
Existing methods for manufacturing cotton-polyester blended yarns from recycled materials result in inconsistent and defective products with undesirable undyed specs, particularly when using recycled polyester fibers of varying lengths and densities.
Innovation Solution
A method involving specific draw frame roller settings and fiber lengths, using 32 mm recycled polyester fibers and 28 mm cotton fibers, along with 1.2 denier polyester fibers, to achieve uniform blending and reduce defects, combined with a ring spinning process that results in a softer, finer yarn with consistent dyeing capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional methods of manufacturing yarn are applied to manufacture a cotton recycled polyester blend, then production can proceed with standard processes, but an undesirable amount of undyed specs are often found in the resulting fabric
Solution Approach 1:
The patent applies parameter changes by optimizing fiber length specifications (32mm for recycled polyester, 28mm for cotton), denier ranges (1.1-1.3 denier for polyester), and twist multipliers (3.7-3.9) to resolve the contradiction between ease of manufacture and yarn quality. These specific parameter adjustments enable conventional ring spinning processes to produce high-quality yarn from recycled fibers without generating undyed specs.
Solution Approach 2:
The patent implements preliminary action through strict pre-spinning preparation requirements, including specifying fiber length and denier parameters before the spinning process begins. This preliminary control of input material parameters ensures that the subsequent manufacturing process produces defect-free yarn, preventing undyed specs from forming in the first place.
2Adaptability or versatility
If recycled polyester fibers from various sources are used, then material sustainability is improved, but fiber inconsistency translates into defects in the resulting yarn and fabric
Solution Approach 1:
The patent applies local quality by specifying different fiber length requirements for different fiber types within the blend: 32mm for recycled polyester and 28mm for cotton. This differentiated approach allows each fiber type to contribute its optimal properties while maintaining overall yarn consistency, enabling the use of versatile recycled materials without sacrificing yarn quality.
Solution Approach 2:
The patent resolves the contradiction between adaptability and precision by establishing specific parameter ranges for recycled polyester fibers: length of 32mm, denier of 1.1-1.3, and twist multiplier of 3.7-3.9. These parameter specifications standardize the properties of recycled fibers from various sources, ensuring consistent yarn quality while maintaining the ability to utilize diverse recycled materials.
3Manufacturing precision
If ring spinning is used to achieve softer and finer yarn, then yarn quality is improved, but the process requires precise control of multiple parameters including twist multiplier and fiber length
Solution Approach 1:
The patent reduces process control complexity by implementing preliminary action through pre-defined fiber specifications before spinning. By establishing fixed fiber length (32mm polyester, 28mm cotton) and denier parameters beforehand, the system eliminates the need for complex real-time adjustments during spinning, while still achieving the desired softness and fineness through ring spinning.
Solution Approach 2:
The patent resolves the contradiction between yarn quality and process complexity by optimizing specific parameters: fiber lengths of 32mm and 28mm, denier of 1.1-1.3, and twist multiplier of 3.7-3.9. These predetermined parameter settings enable ring spinning to produce soft, fine yarn with consistent quality without requiring complex process control, as the optimal parameters are established in advance.
Data Source
AI summary
A method of ring spinning cotton polyester blended yarn. The method is robust and can be used to manufacture the yarn even from polyester fibers that are produced from recycled materials. A new ring spun cotton polyester yarn is also provided. The yarn has few defects and can be effectively dyed when woven into cloth.