Compact spinning technology has successfully solved the hairiness and flying particles caused by ring spinning and improved the strength of the yarn. The wear-resistant strength, yarn appearance and physical properties have been greatly improved. Compared with ordinary ring spinning, it has obvious advantages in terms of yarn quality and output.
What is compact spinning?
Compact spinning is a method of spinning on a new and improved ring spinning machine. A new type of spinning technology.
Principle of compact spinning
Compact spinning (concentrated spinning): a new spinning technology improved on the ring spinning frame, in front of the traditional drafting device Add a fiber control area, and use airflow to laterally condense the fiber bundles passing through the control area, so that the width of the fiber bundles is greatly reduced. The fiber bundles are gathered and then twisted and wound. Almost every fiber of the fiber bundle can be gathered to In the yarn body, a compact yarn with less hairiness and high strength is formed
Spinning equipment
So far, the compact spinning equipment that has been put into use includes foreign Compact spinning Swiss Rieter compact spinning: German Suesen compact spinning, German Zinser compact spinning, Japanese Toyota compact spinning, Shilokas compact spinning.
Compact spinning classification
One is the air flow concentration type compact spinning system, which mainly uses negative pressure air flow force to cause the fibers in the gathering area to shrink laterally. Tight gathering;
One is a mechanical gathering type compact spinning system, which mainly uses The mechanical force causes the fibers in the agglomeration area to shrink laterally and become densely packed.
Key equipment for compact spinning
Gathering roller: Gathering roller is the core component of compact spinning and has important functions such as drafting, air suction and gathering, and fiber transportation.
The function of the air suction pipe: connects the drafting device and the twisting and winding mechanism. Forming a negative pressure suction fiber gathering area
Gathering circle: completing the air suction gathering fiber and transport fiber strips
Compact spinning process parameters
Suction duct air negative pressure:
The negative pressure of concentrated ring suction is generally 1964~3437 Pa;
Gathering circle draft multiple:
If the draft ratio is too large, evenness will deteriorate. Generally, the draft ratio is 1.01~1.05;
Parameters of the gathering circle:
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Using regularly arranged circular holes, 1.2mm aperture and 3mm aperture, it can obtain a larger Good spinning quality.
Compact spinning characteristics
1. Advantages
① Less hairiness
Traditional ring spinning Hairiness is mainly produced in the twisting triangle area, while compact spinning eliminates the triangle area and the hairiness is greatly reduced. Production practice proves. The hairiness of compact spinning yarn is reduced by 70% to 80% compared with traditional ring spinning.
②The strips are good
The fiber straightness in the sliver is improved, and the yarn dryness is better evenly.
③Wear resistance
Compared with traditional ring spinning, the fibers of compact spinning yarn are arranged neatly and straightly. The yarn has a tight structure and the fibers are not easy to fall apart, so the yarn has good wear resistance.
④Strong and high
The strength of the yarn depends on the number of fibers in the yarn sliver.��Cohesion and friction between fibers. Compact spinning has less hairiness. The number of effective fibers in the yarn is greater. In addition, the fibers are neatly arranged and tightly held together. The yarn has high strength. Compared with traditional ring spinning, the strength of compactly spun yarn is increased by 10% to 25%.
⑤Good pilling resistance
Fabric pilling is closely related to the hairiness of the cloth surface. Fabrics produced using compactly spun yarns have less hairiness on the fabric surface and have significantly better pilling resistance than traditional ring spinning;
⑥The twist is small
due to increased strength , can appropriately reduce yarn twist, generally 20% lower than ring spinning, thereby increasing yarn output;
2. Disadvantages
Big equipment investment
High startup cost
Good cleaning
Characteristics of compact textiles
1. Improved fabric appearance
Compact spinning has less hairiness, yarn strips are tight and smooth, and the fabric coverage Therefore, the fabric surface is smooth, the texture is clear, and the drape is improved;
2. Improved fabric service performance
The breaking performance and tearing emphasis of compact textiles The wear resistance and resilience are improved, making the fabric wear-resistant and less prone to pilling, and the wear resistance and iron-free properties of the clothing are also improved;
3. Unique fabric style
The smaller twist of compact spinning makes the fabric feel soft, delicate, and silky. The good wear resistance is more suitable for developing looping and pile fabrics, and makes the looping and raising fabrics or clothing Raised pile is not easy to wear out, and the fibers in cut pile fabric are not easy to wear out.
Applicable scope of compact spinning
1. Combed cotton extra-fine yarn
Cotton extra-fine yarn has high quality requirements, and it is difficult to grasp the requirements for single yarn strength and hairiness during spinning. Using compact spinning technology can solve this problem well.
2. Linen spinning
The ramie yarn spun by the traditional ring spinning method has long and abundant hairiness. In the post-processing process, the cost of singeing is very high, so compact spinning technology should be used to transform the linen spinning frame. The hairiness of linen yarn is greatly reduced, and the shortcomings of traditional ramie yarn such as excessive hairiness, surface hairiness, and obvious defects are improved.
3. Wool spinning
Compared with cotton fiber, wool fiber has lower strength but good elongation performance. Compact spinning can improve yarn strength. Practical applications show that wool compact spinning improves yarn thickness, strength and elongation more significantly
4. Yarn-dyed products
Domestic introduction of compact spinning equipment and The installation and use of compact yarns started with yarn-dyed weaving. At present, the yarn-dyed industry uses the most compact yarns. In Europe, 80% of men’s shirt fabrics are compactly spun.
5. Gray fabric products
The varieties currently used are mainly high-count and high-density fabrics, such as: JC 80*80 anti-feather fabric, JC 60*60 twill, JC 40*40 Zigong, using compact spinning compared with using traditional ring spinning: warp breakage can be reduced by 30%.
6. Knitwear
Compact yarn also has strong advantages when used in knitted fabrics. The varieties currently used include casual wear. High-end underwear, sportswear, T-shirts, etc. Use compact yarn. The cloth surface has less hairiness, so the singeing process can often be omitted; the cloth surface texture is clear, and the quality of the finished cloth is significantly improved; there are fewer breakages. Production efficiency is improved. The overall benefit is relatively high.
