Development of Production Process of Super Soft Coral Products Using Microfibers

As a differentiated fiber with rapid development and excellent performance in recent years, ultra-fine fiber has been widely used in the development of new knit products. It can effectively improve the grade and added value of products, thus becoming a kind of high-end knitwear for enterprises. Popular raw materials have become a typical representative of chemical fiber development in the direction of high-tech and high-fidelity and an important indicator of future fiber industry competitiveness.
Although the application of ultra-fine fibers began in the 1980s and has received attention since the 1990s, there have been major advances in this century. However, there is still no unified definition of microfibers in the world. However, it has only been widely recognized in recent years. . For example, 13 fibers defined by the chemical fiber industry have a monofilament linear density of less than 0.3 dtex, and domestic fibers that are considered to be less than 0.4 dtexfl1 or less than 0.6 dtex are microfibers, but there are also 0 in practical applications. Fibers from .7 to 1.0 dtex are called microfibers. And for the downstream (fiber-applied) companies, the microfibers are more concerned with whether it can meet the balance between the ultra-fine performance and price needed for product use. Therefore, in the dynamic process of continuous application and development of microfiber products, various new products are still emerging. This article mainly discusses the production technology of ultra-soft coral-velvet products using ultra-fine fibers on a double needle bed warp knitting machine.
1 raw material selection
In the early stages of developing the double-needle-bed warp-knitted coral velvet products, since the product is mainly used for blankets, it is particularly required to have ultra-soft appearance with piled-up coral-like features, so microfibre is the best choice. According to the requirements of the combination of equipment conditions, fiber cost-effectiveness, bottom tissue stability and flexibility, 167 dterd288 f (150 D/288 f) polyester low-elastic light mesh yarns and bottom yarn 167 dtex/288 polyester yarns were selected. Elastomeric light wire plus 167 dtex polyester drawdown wire. Although polyester-polyamide composite microfibers are better in terms of fluffiness, lightness, flexibility, and single-fiber linear density, they decided to select the former after considering factors such as process, application properties, and economic benefits.
2 production process
2.1 Braiding equipment and technology
At present, almost all double-bed warp knitting machines with a machine number of between 16 and 22 needles and 25.4 mm and between 5 and 7 combs are suitable for the production of twin-needle warp-knitted coral velvet products. Now we are using 335.3mm(13), 16-pin/25.4mm, machine RD---6DPLM (or HDR6DPLM) weaving on a double needle bed warp knitting machine as an example. The main process is shown in Table 1. , bed spacing 12 mm.

2.2 After finishing the main process
A predetermined shape of a rough cloth is a dyeing or printing, steaming, washing, drying, drying, brushing, combing and cutting.
3 Precautions
The process technology for producing warp-knitted coral velvet products has matured. However, the following aspects should be noted in the production and improvement of product quality.
3.1 to prevent fluffy chaos or curling, falling hair phenomenon
Due to the poor fiber orientation and poor fiber rigidity of the microfibers, it is easy to produce plush and disorganized hair in the production process, resulting in uneven thickness and surface reflections, commonly known as sunlight velvet. Therefore, it is necessary to control the problems of snarling hair and falling hair in the entire process of the main process. The uneven tension in warping, the warp yarn density between the different axes, weaving fabric draw uneven tension, the finishing process or improper operation etc. occurs Shaggy. For the prevention, the following methods can be taken: before the splicing, the initial setting is made to stabilise the plush; in the weaving, the back and front needle bed is dislocated, the dislocation direction is consistent with the direction of the superfine fiber of the pile yarn, and the fiber direction is actively guided. To prevent it (or as little as possible) causing hair disorder and ensure the stability of the grey fabric production.
3.2 Consistency of raw material specifications and production lot numbers
Due to the poor quality stability between fiber batches, it is necessary to strictly control the consistency of raw material specifications and production lot numbers. This has a crucial role in ensuring the dyeing quality of coral fleece products, otherwise color, color, and color yarns are prone to occur. And produce defective products.
3.3 Finishing factors
Coral cashmere products are more prone to the problem of product quality due to the post-finishing process than conventional products. Attention should be paid to the scientific and standard operation of the dyeing process. If there is a slight carelessness, it is easy to produce color, color, and other phenomena. Pay attention to adequate and uniform penetration in the printing, to avoid the bottom of the white due to poor penetration. Pulling hair should control the size of the amount of fluff, if the amount of one-time fluffing is too large, easy to damage the fabric, or to make the cashmere colored fleece rabbit hair over the transfer to the front of the fabric and cause the villi fluff to reduce, thus affecting the style. Finishing shaping to control the size of super-feeding, over-feeding to the General Assembly to make the fabric back to serious, can easily lead to overweight of the finished product. The brolla is controlled in the shaping and the weft of the grey cloth is reduced as much as possible. Pay attention to environmental requirements, washing, soaping, color fastness, etc. must meet the standard. In addition, increasing the number of washings will make the plush more beautiful, the hair stand upright and spread out into a coral shape, and the more the number of washing times is, the better the effect will be, but at the same time the cost increase problem should also be considered.
4 Conclusion
Microfiber knitwear has attracted attention due to its superior fluffiness and softer touch than conventional fibers, and its irreplaceable superior qualities such as light weight, waterproofness, and warmth. Therefore, the application fields and new product quality of microfiber knitwear will surely be better developed and improved with the development of product development.

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