Introduction to the material
Polyurethane (PU) is an emerging organic polymer material, known as the "fifth largest plastic", which is widely used for its excellent physical and mechanical properties, acoustic properties, electrical properties and chemical resistance. The national economy in many fields. Product applications involve light industry, chemical industry, electronics, textiles, medical treatment, construction, building materials, automobiles, national defense, aerospace, aviation and so on.


Product Introduction
PU polyurethane (self-skin) products are made of organic isocyanate and polyol compound as basic raw materials, which are foamed in the mold with built-in support frame by one-step reaction, relying on the foaming components to form a dense and tough skin on the outside and foam inside at once. The surface layer not only through the mold design texture pattern comparable to leather products, and performance is also similar to leather products with a feel, elasticity and affinity, PU polyurethane (self-knotted leather) products, the overall feeling of comfortable sitting tension, warmth and cold, environmental protection, give people a warm, considerate feeling.

Coating Introduction
PU row chairs product surface coating treatment is generally divided into ordinary paint film and antifouling coating two kinds.
Ordinary paint film
In the preparation of PU products, a single paint film needs to be sprayed on the surface of the product to ensure the uniformity of color and beauty of the product, but because the traditional process does not add a new coating to be protected, it is difficult to guarantee the product's impermeability and anti-fouling. After years of research by the technical team of the company and the higher chemical industry institutions, it was found that PU products are similar to human skin after spraying paint film on the surface, there are tiny pores that cannot be seen by the naked eye, and these small pores on the surface are densely packed, which can easily lead to leakage in the process of use, resulting in surface contamination. There are several shortcomings of the product.
1. Not impermeable, easy to cause bacteria: When cleaning the surface, water is easy to penetrate the paint film and breed bacteria, which will lead to mold and discoloration of the PU product surface.
2. Not resistant to dirt: PU surface film after long-term use of the small pores of the surface of the paint film is easy to hide dirt to form difficult to clean stains, affecting the aesthetics of the product.
3. Influence of service life: PU surface is easy to breed bacteria and mildew and easy to hide dirt, in a long time after use of its surface tissue is prone to change, resulting in PU surface aging and fading, which has a certain impact on its service life.

Anti-fouling coating
R & D team in the preparation of antifouling coating on PU products to achieve a new breakthrough, we use polymer materials in the surface of PU products to increase the thickness of a layer of 5μm ~ 10μm of dense antifouling coating.
1.Anti-permeability and anti-mildew: PU surface coating has a certain waterproof function, which is not easy to breed bacteria, and it is difficult for mildew to occur within the normal service life to ensure the service life of the product.
2.Wear-resistant and dirt-resistant, PU surface coating firmly attached to the PU surface, the PU surface film has a certain protective effect, greatly improving the wear resistance of the product, while the product surface is not easy to produce stains.
3. Not easy to fade, not stained, easy to clean. Due to the PU surface antifouling coating has the characteristics of anti-permeability, PU surface dust, water, oil and other dirt, you can clean up with general furniture cleaner. In addition, the antifouling coating also plays a role in protecting the paint from fading caused by oxygen aging, fading, so that the product in a very long time to maintain a bright color.

Note
PU polyurethane row chairs of products with high elasticity and strength, excellent abrasion resistance, fatigue resistance and anti-vibration, the surface done after the anti-fouling coating process is also very good to strengthen the strength of the protection of the product, which does not mean that PU polyurethane (self-skinning) products are not defective, if you are in the use, cleaning or maintenance process inappropriate methods, will still cause damage to its surface, resulting in products The service life is greatly reduced. Therefore, we recommend that you pay attention to the following aspects during use, cleaning or maintenance.
l Do not scratch the surface with knives or sharp awls.
Prohibit impact on surfaces with blunt or heavy objects
l Prohibit cleaning of surfaces with strong acids and alkalis.
l Do not paint surfaces with ballpoint pens or grease pens.
l No high heels or spiked shoes on surfaces.
l Prohibit the placing of heavy, angular objects.
l Prohibit the storage of hot items
l Prohibit the placement of unextinguished materials, such as cigarette butts.
Do not place oily liquids, glue, or thinner.

Cleaning and maintenance
PU polyurethane chairs in use, especially in public places, its surface is prone to residual dust, water, oil and food stains, if not cleaned for a long time will hurt the PU surface coating, especially food stains, a long time not cleaned will lead to a chemical reaction between oil and PU surface coating, destroying the product surface coating tissue and thus the phenomenon of stains clean up not off. Therefore, we recommend that you clean and maintain the PU in a timely manner in the process of use.
Please pay attention to the following aspects when cleaning and maintenance.
l Clean with a furniture cleaner, e.g. Bijou.
l Wipe with a soft, non-fading towel.
General stains such as dust, water and pencil marks can be removed with a damp towel.
Stubborn grease stains, greasy pencil marks and other stains can be cleaned with furniture cleaner and boiling water up to 100°C.
l Prohibit cleaning of surfaces with strong acids and alkalis.