CN105155286A - Preparation method of multifunctional environment-friendly leather fabric - Google Patents

Abstract

The invention relates to leather, particularly to PU (polyurethane) leather with a function of continuously releasing negative ions and fragrance and aims to provide a preparation method of multifunctional environment-friendly leather fabric capable of continuously releasing the negative ions and the fragrance. The multifunctional environment-friendly leather fabric is prepared through steps as follows: step one, coating release paper with a PU fabric layer; step two, applying a PVC (polyvinyl chloride) foamed material layer, and performing plasticizing; step three, coating a plasticized layer with a PVC foaming layer, and enabling PVC to foam at the temperature of 180 DEG C; step four, performing gluing attachment; step five, separating from the release paper. The multifunctional environment-friendly leather fabric has the characteristics that peculiar smell in a room or an automobile is adjusted and eliminated and the like.

Description

Preparation method of multifunctional environmental protection leather fabric

technical field

The invention relates to a kind of leather, especially PU leather with the functions of continuously releasing negative ions and fragrance.

Background technique

my country is the world's largest producer and consumer of artificial leather and synthetic leather. Its production capacity and output are 73% and 69% of the world's respectively. In China, people are used to calling the artificial leather produced with PU resin as PU artificial leather (referred to as PU leather). The artificial leather produced with PU resin and non-woven fabric as raw material is called PU synthetic leather (synthetic leather for short). It is customary to collectively refer to the above three types of leather as synthetic leather.

Artificial leather and synthetic leather are an important part of the plastic industry and are widely used in various industries of the national economy. The production of artificial leather and synthetic leather has a history of more than 60 years in the world. China began to develop and produce artificial leather in 1958. It is an industry that developed earlier in China's plastics industry. In recent years, the development of China's artificial leather and synthetic leather industry is not only the growth of equipment production lines of production enterprises, the increase of product output year after year, and the increase of varieties and colors every year, but also the development of the industry has its own industry organization with considerable cohesion, so It can organize Chinese artificial leather and synthetic leather enterprises, including related industries, and develop them into an industry with considerable strength.

Following PVC artificial leather, PU synthetic leather has undergone more than 30 years of painstaking research and development by scientific and technological experts. As an ideal substitute for natural leather, PU synthetic leather has achieved breakthrough technological progress.

PU coating on the surface of fabrics first appeared on the market in the 1950s. In 1964, DuPont of the United States developed a PU synthetic leather for shoe uppers. After the Japanese company established a production line with an annual output of 600,000 square meters, after more than 20 years of continuous research and development, PU synthetic leather has grown rapidly in terms of product quality, variety, and output. Its performance is getting closer and closer to that of natural leather, and some of its performance even surpasses that of natural leather.

Today, Japan is the largest producer of synthetic leather, and the products of several companies such as Kuraray, Teijin, Toray, and Zhongfang basically represent the international development level in the 1990s. Its fiber and non-woven fabric manufacturing is developing towards ultra-fine, high-density and high non-woven effect; its PU manufacturing is developing towards PU dispersion liquid and PU water emulsion, and the product application field is constantly expanding. The field has developed into other special application fields such as clothing, ball games, decorations, etc., and it pervades all aspects of people's daily life.

Artificial leather is the first invention to be used as a substitute for leather fabrics. It is made of PVC, plasticizer and other additives and calendered on cloth. The advantages are cheap, rich colors, and various patterns. The disadvantage is that it is easy to harden, become brittle. PU synthetic leather is used to replace PVC artificial leather, and its price is higher than PVC artificial leather. In terms of chemical structure, it is closer to leather fabrics. It does not use plasticizers to achieve softness, so it will not become hard and brittle. At the same time, it has the advantages of rich colors and various patterns, and the price is cheaper than leather fabrics. So it is welcomed by consumers.

There is also a PU matching leather. Generally, the reverse side is the second layer of cowhide leather, and a layer of PU resin is coated on the surface, so it is also called film cowhide. Its price is relatively cheap and its utilization rate is high. With the change of technology, it can also be made into various grades, such as imported two-layer cowhide, because of its unique technology, stable quality, and novel varieties, it is the current high-grade leather, and its price and grade are no less than the top layer of leather. PU leather and genuine leather bags have their own characteristics. PU leather bags are beautiful in appearance, easy to take care of, and low in price, but not wear-resistant and easy to break; genuine leather is expensive and troublesome to take care of, but durable.

Natural leather is widely used in the production of daily necessities and industrial products due to its excellent natural characteristics. However, with the growth of the world population, the human demand for leather has doubled, and the limited amount of natural leather has long been unable to meet this demand. In order to solve this contradiction, scientists began to research and develop artificial leather and synthetic leather decades ago to make up for the deficiency of natural leather. The research history of more than 50 years is the process of artificial leather and synthetic leather challenging natural leather.

Scientists started from the research and analysis of the chemical composition and organizational structure of natural leather, started from nitrocellulose varnish, and entered PVC artificial leather, which is the first generation of artificial leather. On this basis, scientists have made various improvements and explorations, first of all, the improvement of the substrate, and then the modification and improvement of the coating resin. In the 1970s, synthetic fiber non-woven fabrics appeared needle-punched, bonded and other processes, so that the base material had a lotus-shaped cross-section and a hollow fiber shape, and achieved a porous structure, which conformed to the network structure of natural leather. Requirements: At that time, the surface layer of synthetic leather has been able to achieve a microporous polyurethane layer, which is equivalent to the grain surface of natural leather, so that the appearance and internal structure of PU synthetic leather are gradually approaching that of natural leather, and other physical properties are close to those of natural leather. indicators, and the color is brighter than natural leather; its normal temperature folding resistance can reach more than 1 million times, and the low temperature folding resistance can also reach the level of natural leather.

The emergence of microfiber PU synthetic leather is the third generation of artificial leather. The non-woven fabric of its three-dimensional structure network creates the conditions for synthetic leather to catch up with natural leather in terms of substrate. Combining the newly developed PU slurry impregnation with open-pore structure and the processing technology of composite surface layer, this product exerts the huge surface area and strong water absorption of ultra-fine fibers, making the ultra-fine PU synthetic leather have a beam-like ultra-fine The natural hygroscopic properties of collagen fibers are comparable to high-grade natural leather in terms of internal microstructure, appearance texture, physical properties, and people's wearing comfort. In addition, microfiber synthetic leather surpasses natural leather in terms of chemical resistance, quality uniformity, adaptability to large-scale production and processing, and waterproof and mildew resistance.

Practice has proved that the excellent properties of synthetic leather cannot be replaced by natural leather. From the analysis of domestic and foreign markets, synthetic leather has also replaced natural leather with insufficient resources. The use of artificial leather and synthetic leather to decorate bags, clothing, shoes, vehicles and furniture has been increasingly recognized by the market. Its wide application range, large quantity and variety are beyond the satisfaction of traditional natural leather.

With the continuous improvement of people's living standards, the requirements for artificial leather are getting higher and higher, but the present artificial leather has negative ion function and fragrance function and has not yet appeared.

Contents of the invention

The purpose of the present invention is to solve the deficiencies of the above-mentioned technologies, and provide a preparation method of a multi-functional environment-friendly leather fabric that can continuously release negative ions and fragrance.

In order to achieve the above object, the multifunctional environment-friendly leather fabric of the present invention is obtained in this way. The first step is to coat the PU fabric layer on the release paper. According to the percentage by weight, negative ions account for 15%, fragrances account for 0.05%, and the rest are colorants. Mix these three with PU material evenly, filter, and coat the PU fabric layer with the required thickness on the release paper on the production line, QDRGD135 The second step is to coat the PVC foam layer. When coating the PVC foam layer, the colorant, fragrance, and negative ions of the PVC foam layer are used in percentages by weight, wherein negative ions account for 15%. Fragrance accounts for 0.05%, and the rest is colorant. Mix these three with the foaming material of the PVC foaming material layer evenly, filter, and then coat the PVC foaming material layer of required thickness on the dried PU fabric layer. After the coating is completed, it is plasticized at a temperature of 155 degrees; the third step is to apply a PVC foam layer on the plasticized layer, and then let the PVC foam under the condition of 180; the fourth step is to glue and fit and apply glue layer, and then stick it with the cloth and dry it at 150 degrees; the fifth step is to separate it from the release paper.

After the above-mentioned separation from the release paper, it can also go to the third version for printing processing. During the printing processing, add, toner, negative ions and fragrances in the printed ink, the three are by weight percentage, and the negative ions account for 15%. %, aromatics account for 0.05%, and the rest are colorants, which are evenly mixed with the main ingredients of the ink, filtered, and then embossed in the subsequent process.

The above-mentioned multi-functional environmental protection leather fabric has the function of regulating and eliminating the peculiar smell in the room or in the car. In the process of indoor or car interior decoration, the decoration materials used will volatilize the peculiar smell harmful to the human body, and the fragrance and negative ions will be released during use. Release, so as to eliminate the peculiar smell in the small space, and at the same time, it can also adjust various peculiar smells in public places. The released fragrance and negative ions can soothe the human body and make people feel more comfortable.

Detailed ways

The preparation method of multi-functional environment-friendly leather fabric, the first step is to coat the PU fabric layer on the release paper. When coating the PU fabric layer, the coloring material, aromatic agent and negative ion are firstly mixed according to the weight percentage, wherein the negative ion accounts for 15%, and the aromatic The additive accounts for 0.05%, and the rest is coloring material. Mix these three with PU material evenly, filter, and go to the production line to coat the PU fabric layer with the required thickness on the release paper, and dry it at QDRGD135 degrees; the second step is to coat PVC. Foaming material layer, when coating the PVC foaming material layer, the coloring material, aromatic agent, and negative ions of the PVC foaming material layer are first calculated by weight percentage, wherein negative ions account for 15%, aromatic agents account for 0.05%, and the rest are coloring materials. Mix these three with the foaming material of the PVC foaming material layer evenly, filter, and then coat the PVC foaming material layer of the required thickness on the dried PU fabric layer, and plasticize it at a temperature of 155 degrees after the coating is completed. The third step is to apply a PVC foam layer on the plasticized layer, and then let the PVC foam under the condition of 180; Dry at 150 degrees; the fifth step, separate from the release paper. After testing, the multi-functional fabric and environmentally friendly leather can still release negative ions and fragrances after use until it is damaged, and it can be used for a long time.

Claims (2)

1. the preparation method of a multi-functional environment-protection leather fabric, it is characterized in that: the first step, release liners is coated with PU precoat, during painting PU precoat colorant, aromatic, anion three by weight percentage first, wherein anion accounts for 15%, aromatic accounts for 0.05%, all the other are colorant, this three and PU is expected Homogeneous phase mixing, filtration, in release liners, be coated with the PU precoat of desired thickness to production line, then dry under 135 degree; Second step, be coated with the PVC foam bed of material, during the painting PVC foam bed of material the colorant of the PVC foam bed of material, aromatic, anion three by weight percentage first, wherein anion accounts for 15%, aromatic accounts for 0.05%, all the other are colorant, the foamed material Homogeneous phase mixing of this three and the PVC foam bed of material, filter, on the PU precoat of drying, be then coated with the PVC foam bed of material of desired thickness, plastify at 155 degree of temperature after coating completes; 3rd step, plasticizing layer is coated with PVC foam layer, under 180 conditions, then allows PVC foam; 4th step, upper glue laminating, apply glue layer, then fits with cloth, and dry under 150 degree; 5th step, is separated with release liners, obtains required product.

2. the preparation method of a kind of multi-functional environment-protection leather fabric according to claim 1, it is characterized in that: above-mentioned be separated with release liners after, printing treatment is carried out to three Ban Hou roads, when printing treatment, printing ink in add, tinter, anion and aromatic, three is by weight percentage, wherein anion accounts for 15%, aromatic accounts for 0.05%, all the other are tinter, with ink major ingredient Homogeneous phase mixing, filter, then carry out the embossing process of rear road.