Microfiber Synthetic Leather Will Gradually Replace Some Of The Genuine Leather.

With the development of the world economy and the continuous improvement of people's living standards,

The demand is increasing year by year.

However, after entering the 1990s, all countries in the world increased the intensity of environmental protection, and implemented measures such as returning farmland to forests, returning grazing to grass, and so on.

In this situation, in order to make up for the shortage of natural leather, two in order to meet people's needs of higher level, microfiber synthetic leather is gradually used instead of a part of genuine leather.

In some countries and regions such as Japan, the development of technology has greatly replaced the microfiber synthetic leather.

And some bags made of synthetic leather and synthetic leather.

The decoration of shoes and vehicles and furniture has also been increasingly recognized by the market. Its wide application range, large quantity and variety of products make it impossible for traditional natural leather to do so.

In our country, microfiber synthetic leather, as an important part of the plastics industry, is widely used in various sectors of the national economy.

Environmentally friendly and high value-added microfiber synthetic leather

There are two kinds of fibers used in artificial leather, superfine fiber and ordinary fiber. The difference between them is linear density -- the linear density of superfine fiber is less than 0.55dtex, and the linear density of ordinary fiber is higher than 1.1dtex.

Microfiber synthetic leather was developed by Japanese experts using composite spinning technology more than 40 years ago. It has a similar microstructure to natural leather, and overcomes the disadvantages of poor shape, poor uniformity of thickness, shrinkage and hardening of water, and moldy moisture.

The advanced superfine artificial leather tries to surpass the real leather in performance, and its price is even more expensive than the genuine leather.

Leather has always been popular with people because of its excellent hygroscopicity and excellent dehumidification function, which can reduce the peculiar smell produced in shoes and improve the microclimate in shoes, so that it has the comfort of wearing and meets the health requirements of the human body.

Comfort (hydrophilicity, sweat absorption, elasticity, breathability, moisture permeability, warmth retention) is the most basic requirement of middle and high grade shoes. Therefore, as shoe material, it must have certain hygroscopicity to ensure that sweat is evenly distributed in the process of wearing.

Hygroscopicity is a basic indicator of fiber properties.

Most of the synthetic fibers lack or do not have enough hygroscopic affinity, so the hygroscopicity is poor.

However, due to the limitation of natural conditions, the world's natural leather will not increase greatly, and the microfiber synthetic leather can not only supplement the shortage of natural leather in quantity, but also has more and more properties than natural leather, which has been applied in more and more fields.

In fact, the hygroscopic property of microfiber synthetic leather is the best among all synthetic leather. According to the data, the permeable steam of natural leather is about 800mg/ (250px2.24h), while the moisture permeability of superfine fiber cloth is about 400mg/ (250px2.24h). This is mainly due to the more hydrophilic groups of collagen fibers in natural leather than those in microfiber.

Therefore, the application of natural leather processing technology to the production of microfiber synthetic leather is a promising investment project that is highly valued by experts.

Compared with the natural leather, the superfine fiber base cloth has smaller density of woven fabric and loosely woven base cloth, resulting in its thin handle.

According to the analysis of histological sections, the single fiber of the superfine fiber base is linear columnar, and forms a net solid structure through the intersecting of branches, while the single fiber of natural leather is curved and linear, forming a net solid structure through mutual division.

Therefore, compared with the leather made from natural leather, the superfine fiber base cloth has a large modulus of elasticity and is not easy to embossing.

The processing technology of natural leather is applied to the processing of superfine fiber synthetic leather, which solves the problem that the microfiber synthetic leather is thin, loose, poor in hand and easy to crease when used, so that it can basically reach the true leather properties.

Because the superfine leather synthetic leather is strong in imitation leather, the selling price can be increased by about 30%.

With the increasingly stringent requirements of environmental protection, the problem of leather pollution has attracted more and more social attention. The production process of microfiber synthetic leather has no solid waste. Compared with the processing of natural leather, the amount of water consumption in the whole finishing process is very little, and the dosage of chemical material is very little. The process design is reasonable, the BOD and COD value of waste water is very low, which can meet the requirements of cleaner production and reduce the difficulty of sewage treatment.

Both the appearance and inner structure are close to natural leather.

Microfiber synthetic leather is a product of continuous automatic production, with high production efficiency and stable product quality.

The processing technology of natural leather for superfine fiber synthetic leather processing must be cut into blocks, and the chemical material can be penetrated into the superfine fiber by means of the mechanical function of the drum, which increases the complexity of the operation.

Therefore, we must further study this processing method to find a suitable method for continuous production.

In order to improve the handle of microfiber synthetic leather, chrome powder was used in processing, and general acid dyes were used to give the color of synthetic leather popular, but it added an obstacle to the export of products.

Because there is a certain gap between the microfiber synthetic leather and the genuine leather's feel performance, that is, the superfine fiber synthetic leather has the problem of low moisture permeability, so people never stop exploring the leather method of synthetic leather.

Production processes need to integrate the entire industry process.

The main component of superfine fiber is polyamide fiber.

According to the data, the composition and structure of polyamide fiber are simpler than that of protein fiber. Carboxyl and amino groups only exist at the end of molecular chain.

In the middle of the molecular chain, there are a large number of carbon chains and amide groups, without side chains.

Therefore, for the structure and production process of polyamide fiber, acid hydrolysis and enzymatic hydrolysis technology should be used first, chemical modification of superfine fibers should be carried out, and then the amide bonds should be opened to increase their active groups. Then, the retanning, filling, fatliquoring and dyeing techniques of natural leather were used to fill the superfine fibers, and improve the permeability and other physical properties of the superfine fibers.

As a new synthetic leather processing method, it is feasible to introduce leather wet processing and finishing technology into the production of microfiber synthetic leather.

But with the improvement of microfiber processing technology level, it is necessary to fundamentally improve the manufacturing process of microfiber cloth, so that the physical properties and touch of the superfine fiber base cloth and the natural leather leathers will be similar.

It is especially important to note that the development of microfiber synthetic leather must be combined with leather making, dyeing and finishing, shoemaking and furniture processing to form the top and bottom line and improve the overall development capability. Only in this way can we improve the vitality of microfiber synthetic leather.

Superfine fiber has the following four different production processes, blending fiber (indefinite island fiber): the advantage is that it is easy to produce very fine fibers. The disadvantage is that it is necessary to dissolve the fibers with solvent. The dissolved sea part PS will lose, and the proportion of "sea" is high, and the proportion of PU used in leather making is also high.

Island fiber: the advantage is that the fiber density is uniform, but if it is PET/PS component, it also needs solvent treatment; if it is PA/CoPET component, then part of the sea CoPET will also be wasted.

Direct spinning: no pollution, no loss, PET can be recycled.

Polyester / nylon composite: artificial leather contains two ingredients, no pollution, but it is difficult to split two ingredients intact.

Because of the reason of color fastness, it is not suitable for suede. Because of PA, it is not suitable for industrial application.

According to the quality of artificial leather, the products can be classified as high-grade suede: the Japanese factory has monopolized the market, and is a high-end product for clothing, household and automobile industries. Artificial suede is mainly produced by South Korea and Taiwan, China. It is made of nylon and sea island fiber and used in shoes and bags. Artificial smooth leather is produced with superfine nylon island fiber and applied to shoes and bags. Ordinary smooth leather is produced by ordinary polyester or nylon, mainly used in shoes and bags; woven suede: it is not artificial leather, and the price is low.

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Japan leads the global monopoly of high-end market

Japan is the most advanced country in the world of superfine fiber synthetic leather and monopolizes the high-end market.

Synthetic leather in Japan is basically a high-grade artificial leather made from superfine fiber, and the annual increase rate of synthetic leather is over 20%.

In 2003, the output of artificial leather in Asia reached 1 billion 767 million 570 thousand m2, of which 516 million 560 thousand m2 was produced in Japan.

Japan's Microfiber artificial leather has not only the technology of coke Li, but also some other companies such as emperor, Dongli, Asahi, MITSUBISHI, Chung spinning and so on have their own microfiber artificial leather technology. At present, they have taken various measures to enter the Chinese market, but they are different from each other.

The emperor is a company of Dolly.

In recent years, the company has developed environmentally-friendly artificial leather "Loeler II". Its handle is similar to that of natural leather. The artificial leather does not use organic solvents at all.

The company has invested 3 billion yen (about 240 million yuan) to introduce new equipment and is said to be in production now.

Loeler II type artificial leather, both sides of its interior and exterior are similar to the structure of natural leather, the epidermis membrane is not easy to wrinkle, even if it is bent and folded without wrinkles, compared with the artificial leather in the past, it has the characteristics of easy processing, comfortable wearing, durable and high strength.

This product is very beneficial to environmental protection because of its use of water-soluble polyurethane and organic solvents.

Dongli company.

Senna, a high quality fabric brand developed by Dongli company, "TOREX Dongli tex", is a suede style artificial leather.

The Dongli company has factories in Japan and Italy, and has sales companies in the United States. Through this system, the global strategy is carried out in various fields such as clothing, fabrics, car cushions, furniture, IT related products and so on. Recently, for the Chinese market with great potential for development, it is prepared to change the original three yuan system to four yuan system.

Asahi Asahi Textile Co., Ltd.

Asahi Asahi textile company produces artificial leather "La mousse".

At present, 70% of the product is used for furniture products, and the company is ready to open up new uses and new markets for this product.

The characteristics of artificial leather produced by the company are as follows: (1) most of the polyester fibers used in the base cloth are regenerated fibers; secondly, polyurethane impregnation does not use organic solvents, and belongs to environmental protection products.

MITSUBISHI Liyang company.

The "GLORE" artificial leather made by MITSUBISHI Liyang is the only man-made leather in the world with acrylic fiber and suede style in the base cloth. Because of its soft texture and bright color, it is widely used in clothing, fabrics, footwear, interior decoration and other fields.

Chung Fang Synthetic Fiber Co., Ltd.

Zhong Fang synthetic fiber company is expanding its export of suede style fabrics for super fine fiber "BelimaX" for China. The first year for the autumn and winter 2004, its sales volume was 50 thousand meters.

The sales target is mainly the high-end product market, each jacket should be around 2000 yuan, and we look forward to gradually expanding sales in the next two years.

Synthetic leather manufacturers in Korea and Taiwan use very fine fiber artificial skin.