Non Dyed Fiber Greatly Reduces Dyeing Cost And Environmental Affinity

Non dyed polyester filament can be blended with staple fiber, and its yarn has both filament and staple fiber style.

Non dyed polyester industrial yarn is mainly used in automobile safety belts, military bags, hoisting belts and other fields.

With the strict implementation of the new national environmental protection law, the requirements for post dyeing of fibers, yarns and fabrics are more and more stringent.

The new environmental protection law has raised the demand for the waste water and organic matter discharged from the rear road, resulting in a sharp increase in the cost of dyeing.

With the increase of printing and dyeing industry, the cost advantages of non dyed fibers are becoming more and more prominent.

It is a coloured fiber directly spinning through the coloring technology of raw liquid, which can fundamentally solve the problem of dyeing consumption and wastewater discharge, and save a lot of dyeing cost.

At the same time, the fabrics without dyed fabrics are brightly colored, uniform in color, durable in use, easy to fade, and are friendly and friendly to the human body.

Non dyed fibers have also become the "new favorite" of textile fashion.

Greatly reduce the cost of dyeing and environmental friendly

The coloring of the original solution of non dyed fibers refers to polyester melt (or chips) injected into the spinning box before being injected into dry, fused, filtered and measured pigments (color masterbatch). After mixing fully with the polyester melt and high efficiency static mixer, the polyester melt enters the spinning box to spin.

In the process of melt spinning, non dyeing fibers can omit most dyeing and finishing processes, and achieve a high degree of integration of colorful and clean production while reducing carbon dioxide and COD emissions and saving water and chemicals.

Non staining fiber has 3 main advantages:

First, non dyed fibers reduce the consumption of raw materials, avoid environmental pollution, reduce the cost of dyeing, and save huge amounts of pollution control costs.

According to experts, considering the difference between light color, medium color and dark color, the cost per ton of non dyed fiber is 30% to 50% per ton than that of the latter.

For example, the toner of medium color can save 5000 yuan per ton, reduce electricity consumption by 11 thousand degrees, save water 100 tons, save 150 kilograms of dyes and chemicals, and the economic and social benefits are very significant.

Second, non dyed fibers have the characteristics of uniform dyeing, avoiding the defects such as chromatic aberration, color spots and color flowers easily produced in conventional dyeing.

Third, the varieties of non dyed fibers are abundant, and the products have achieved functional, differential and high color fastness and bright coloring. The development trend will also be effectively combined with functionality, flexibility, ecological affinity and comfort.

At present, non dyed fibers have been expanded from non dyed polyester to nylon.

, polypropylene, aramid, spandex and other fields.

Non dyed polyester is currently the leading producer of non dyed fibers.

Non dyed polyester filament can be blended with staple fiber, and its yarn has both filament and staple fiber style.

Non dyed polyester industrial yarn is mainly used in automobile safety belts, military bags, hoisting belts and other fields.

Non dyed acrylic fiber is one of the fastest developing non dyed fibers.

Sinopec Shanghai petrochemical Limited by Share Ltd has launched a "

"

This fiber is made from polyacrylonitrile fiber in the production process, adding pigment to the interior of the fiber, and then spinning.

Due to the addition of colored raw materials before spinning, no colored waste water is produced in the fiber production process, thus avoiding the production of a large number of colored sewage in the rear dyed plant.

At the same time, polyacrylonitrile dyed fibers, due to the natural characteristics of pigments added to the fibers, make the fibers have higher color fastness, such as rubbing fastness, washing fastness, light fastness and weather fastness, which are significantly higher than those of the rear dyed fibers.

A person in charge of Shanghai petrochemical company introduced: "after 10 years of continuous development, we completed the pilot and pilot tests from the laboratory until industrial production, and formed our own intellectual property rights.

We have also worked closely with the back spinning enterprises to successfully complete the crossing of polyacrylonitrile dyed fibers from fiber to yarn and smoothly enter the market.

It is reported that the company achieved the industrial production of polyacrylonitrile dyed fiber in 2008.

In 2014, sales of polyacrylonitrile non dyed fibers were about 1500 tons, an increase of about 50% over 2013.

In 2015, polyacrylonitrile dyed fibers successfully entered the "2015/2016 China fiber fashion trend".

The director also said that the current application of polyacrylonitrile dyed fibers is mainly divided into taking and outdoor use. The series is made of non dyed acrylic fiber blended with conventional fibers, which is widely used to prepare linen yarn, chenille yarn and other products. The outdoor series is mainly used for making awning, car roof, tent, boat awning and outdoor decorative household fabric. The market demand is high, and the added value of products is high.

Non dyeing spandex has been widely applied in recent years.

Non dyed spandex fiber can be blended with polyester, acrylic, cotton, wool and other fibers. It can give the fabric excellent elasticity and is generally used to produce black silk stockings and high-grade fabrics without dyeing.

Zhuji Huahai spandex Co., Ltd. recently launched a "black spandex dyed fiber", which is made of polyether dry spinning process, using continuous polymerization, high-speed spinning, multi spun spinning and other spandex energy-saving spinning technology.

The black spandex dyed fiber has the properties of high temperature resistance, chlorine resistance, dyeability and aging resistance. At the same time, the fiber has a higher color fastness, about 2~3 times that of ordinary fabrics.

Black spandex non dyed fiber products can replace imported products, and its super fine denier specifications can meet customers' demand for microfiber products more widely, so they are widely used in all kinds of high-grade fabrics.

At present, Huahai, Zhuji, has four kinds of spandex fiber products, namely, dull, glossy, semi glossy and coloured.

Black spandex non dyed fibers also successfully entered the "2015/2016 fiber fashion trend".

At present, Xinxiang chemical fiber has developed spandex black silk products, and has realized the batch production of spandex colored yarn.

Non dyed nylon can be woven with non dyed polyester to develop plain fabric. It is suitable for spring and summer fashion, and can also develop polyester / nylon composite twill elastic fabric. It is suitable for clothing in autumn and winter.

Standardization, informatization and functionalization are their developing directions.

During the "12th Five-Year" period, China's dyed fibers entered the era of rapid development.

In 2014, the output of chemical fiber in China reached 44 million 327 thousand tons, of which the total output of coloring yarn was 4 million 500 thousand tons, accounting for about 10% of the total output of chemical fiber.

The raw liquid dyed polyester filament grew at an average annual rate of 12%, reaching 3 million 300 thousand tons, accounting for 12.5% of the total polyester filament output; the raw liquid dyed polyester staple fiber increased by 25.7% annually, reaching 750 thousand tons, accounting for 8% of all polyester staple fiber output; the original liquid dyed nylon was growing at 71% per year, reaching 43 thousand tons, accounting for 1.7% of the total nylon output; the original liquid dyed viscose increased by an average of 49% per year, reaching 79 thousand tons, accounting for 1.7% of the total viscose production.

In non dyeing fiber production, color masterbatch plays a very important role. Masterbatch is mainly used for fiber spinning and coloring, masterbatch pigment particles are fine, high concentration, strong coloring power, heat resistance, good light resistance.

The addition of color masterbatch has the advantages of convenient operation, no pollution to the molding environment, uniform coloring, stable, easy to measure, and high degree of automation.

At present, there are more than 30 fiber grade masterbatch production enterprises in China, mainly distributed in Guangdong, Jiangsu, Zhejiang, Shanghai, Shandong and other places. The annual output of various varieties of chemical fiber color masterbatch is about 150 thousand tons, of which black masterbatch accounts for about 2/3, and other color masterbatch accounts for about 1/3.

Although the dyed fiber industry has developed rapidly, there are still a series of problems, such as confusion of color system, incomplete chromatogram of some products, dark color, long development cycle, large consumption of development, large initial processing batch and so on.

According to experts from the China Academy of textile science, the future of non dyed fibers will develop towards standardization, informatization and functionalization in the future.

Therefore, the expert recommends that the chemical fiber enterprises mainly solve the existing problems of non dyed fibers from four sides.

The first is the preparation technology of color masterbatch and color paste.

Enterprises should focus on the standardization of Color Masterbatch, color paste and stable production technology; color distribution, color masterbatch addition, uniform dispersion technology, special colorants, functional nanomaterials preparation and industrialization technology level.

The second is the coloring and spinning technology.

The research direction of the enterprise should focus on the flexibility of polyester and polyamide polymerization spinning, high efficiency on-line adding technology and its modularization; the deep dyeing technology of high quality microfilament fibers; the dyeing technology of regenerated cellulose fiber raw solution; and the functional technology of raw liquid dyed fibers.

The third is standardized sample preparation technology.

Enterprises should focus on unit test line, equipment standardization and processing technology; establishment of PET, PA filament standard fiber sample specification; PET, establishment of key quality specification for viscose staple fiber; bulk preparation of standard fiber samples; standard fabric sample preparation; standard color card preparation.

The fourth is color standardization and management.

Enterprises should focus on color evaluation and digitalization technology, color library digital management technology, color library and quick response production guarantee system.

For the future development prospects, experts predict that by 2020, the output of China's silk will double to 10 million tons per year, when it reaches 10 tons of water, equivalent to the amount of water pported from the middle route of the south to North Water Transfer Project.

The head of Shanghai Petrochemical also expressed good prospects for the market prospect of non dyed fibers.

"Because the coloring of non dyed fibers is carried out in the production process of fiber, it does not produce obvious emissions of colored sewage and organic matter.

In addition, the cost of dyed fibers produced by high and new technology is low, and the color fastness is higher than that of the dyed fibers. Therefore, it has strong competitiveness and vitality.

The person in charge said.