“Polyester fabrics are prone to pilling, and pure cotton clothes tend to deform. So what kind of fiber has the excellent characteristics of cotton and polyester to make up for it? What are the shortcomings?”
“That is super imitation cotton”
What is super imitation
Super imitation cotton” is mainly polyester with a polyester content of more than 85%. It is a differentiated and functional polyester fiber, including filament imitation cotton and short fiber imitation cotton. To put it more vividly, super imitation cotton products It looks like cotton (visual), feels like cotton (tactile), wears like cotton (compatibility), and is more convenient to use than cotton (washability). It has the advantages of imitating cotton and imitating cotton, and imitating cotton is better than cotton. It is the product of the mutual integration and integration of multiple technologies such as polymerization modified spinning, spinning, weaving, dyeing and finishing.
What is super imitation cotton?
1
Imitate the properties of cotton fiber
① Imitate hairiness and bulkiness
Polyester filament has high bundling properties and a smooth surface. To make the surface have a cotton-like feel, the fiber must be treated Structural changes. Currently, there are several ways to improve the wool feel and bulkiness of polyester: using the air network form to blow out the filaments and intertwining them to form irregular structures, and using different combinations of raw materials to form three-dimensional curled and bulky shapes, etc.
From the perspective of hairiness, the air network deforms like The fineness of cotton silk is uneven, and the wool feel is greatly different. The imitation cotton silk with different raw material combinations has uniform fineness, and the wool feel can be highlighted during post-finishing, which generally does not affect the production of subsequent processes.
②Imitate the hygroscopicity of cotton fiber
The current methods to improve the hygroscopicity of polyester mainly include: using fine or ultra-fine denier filaments to increase the specific surface area of the fiber and improve Capillary wicking speed; modify the fiber cross-section to add moisture absorption and moisture-conducting grooves to speed up moisture absorption; hydrophilically modify the fiber to add hydrophilic groups on the fiber to enhance the moisture absorption capacity of the fiber.
③Imitate the luster of cotton fiber
To improve To achieve the glossiness of polyester and achieve the effect of cotton fiber, diffuse reflection must be formed on the fiber surface to weaken the reflection ability of light. Methods to weaken the gloss include: modifying the fiber surface to reduce the reflection of light on the surface, or absorbing the light. Part of the light forms a soft luster, and fine or ultra-fine denier fibers are used to improve diffuse reflection capabilities and make the light soft.
2
Make up for the defects of cotton fiber
Use the characteristics of polyester to make up for the shortcomings of cotton fiber fabrics. For example, polyester has good weather resistance properties such as light resistance, heat resistance, and mold resistance, which can make up for the lack of durability of cotton fabrics; polyester has a large initial modulus, is stiff, and is not easy to deform, and has good shape retention, which can make up for the shortcomings in durability of cotton fabrics. Cotton fabrics are prone to wrinkles, deformation, and wear resistance.
It is also developed according to the different needs of users, different fields of use and the needs of some specific functions. Some even have superior performance and usability than pure cotton fabrics. By using different hydrophilic agents and different cross-sectional shapes to modify the fiber, the hygroscopicity of the super-cotton-like fiber can have different characteristics to meet the needs of people with different amounts of exercise.
Recycled beverage bottles, discarded coffee grounds, etc. are reused for the production of super-imitation cotton fiber, giving the super-imitation cotton fiber new green and environmentally friendly characteristics.
How to imitate super imitation cotton?
Weaving process
①Organizational structure
Super imitation cotton The cotton-like effect of the fiber first depends on the organizational structure of the fabric. Due to the thin fibers and strong capillarity, coupled with the special-shaped cross-sectionstate, good hygroscopicity. However, in the fabric structure, in order to enhance its hygroscopicity, the fabric weave must be designed according to the different application fields of the fabric. Sometimes the plain weave is better, and sometimes the twill weave is better.
②Longitude and weft density settings
Due to the special properties of super cotton-like fiber, the shrinkage characteristics of the fiber during the finishing process are taken into consideration. The warp and weft density should be designed properly so that the fibers can fully reflect the thickness and fluffiness of the fabric after heat shrinkage.
Dyeing and finishing process
A large part of the cotton-like effect of super cotton-like fiber is reflected through post-finishing. Due to the special properties of the raw materials, in order to enhance the cotton-like effect, it must go through the embryonic process. Custom processing, so that the fiber can fully shrink and the fluffiness will be more prominent.
General process flow:
Soft tenter shaping finishing
Due to the large modulus of polyester, the fabric is relatively stiff, overcoming the shortcomings of pure cotton fabrics that are easy to deform and are not durable. But the stiffness is too strong and it will be uncomfortable to wear. To make the fabric have a moderately soft feel, the fabric needs to be softly finished. During the process of thermal shrinkage of the fabric, it is tentered and shaped taking into account that the fabric has fully shrunk to enhance the cotton-like feel of the fabric.
Blanket finishing
After felting, the fabric feels plumper and softer, further improving the simulation and wearing performance.
Application of super imitation cotton products
Super imitation cotton products are not only close to cotton fabrics in terms of fiber surface morphology and fabric style, but more importantly, their fabric performance and Functionally, it imitates cotton and super cotton, and has excellent dynamic thermal and moisture comfort performance. Therefore, its fiber can be widely used in knitting, woven, sportswear, casual wear, shirts, underwear, outerwear, home textiles and other products.
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