Case

What is PVC material? PVC material detailed introduction

Release time:

2017-09-20

1. perfect structure (PVC plastic box)
PVC, the full name of Polyvinylchlorid, the main component of polyvinyl chloride, in addition to add other ingredients to enhance its heat resistance, toughness, ductility and so on. The top layer of this surface film is lacquer, the main component in the middle is polyvinyl chloride, and the bottom layer is back-coated adhesive. It is a popular and widely used synthetic material in the world today. Its global use in a variety of synthetic materials in the second highest. According to statistics, in 1995 alone, the production of PVC in Europe was about 5 million tons, while its consumption was 5.3 million tons. In Germany, the production and consumption of PVC averages 1.4 million tons. PVC is being produced and applied worldwide at a growth rate of 4%. In recent years, the growth of PVC in Southeast Asia is particularly significant, thanks to the urgent need for infrastructure construction in Southeast Asian countries. Among the materials that can produce three-dimensional surface films, PVC is the most suitable material.
PVC can be divided into soft PVC and hard PVC. Among them, hard PVC accounts for about 2/3 of the market and soft PVC accounts for 1/3. Soft PVC is generally used for floors, ceilings and leather surfaces, but because soft PVC contains softener (which is also the difference between soft PVC and hard PVC), it is easy to become brittle and difficult to preserve, so its scope of use is limited. Hard PVC does not contain softener, so it has good flexibility, easy to form, not easy to be brittle, non-toxic and non-polluting, and has a long storage time, so it has great development and application value. The essence of PVC is a vacuum blister film, which is used for surface packaging of various panels, so it is also known as decorative film and adhesive film, which is used in building materials, packaging, medicine and many other industries. Among them, the building materials industry accounted for the largest proportion, 60%, followed by the packaging industry, there are a number of other small-scale applications of the industry.
2. strict process
PVC can be widely used in building materials industry, there are two very important reasons:
One is the unique properties of PVC (rainproof, fire-resistant, antistatic, easy molding), and the other is the characteristics of low input and high output of PVC. So, why can PVC have the above two advantages? Let us find the answer from its production process.
The production process of PVC is not complicated. The common production line is generally composed of a roller press, a printing machine, a back coating machine and a cutting machine. The film with a thickness of only 0.3mm to 0.7mm is mainly produced through the direct stirring of the roller press, the rotation of the roller and the high-temperature rolling. At the same time of production, the front surface of the film is printed with color by the printing machine, and a layer of back coating is attached to the back surface on the back surface of the film. Don't underestimate this layer of back coating, it is an important guarantee for the high quality performance of PVC film. The back coating is composed of special materials and is a high-energy affinity agent. It is precisely because of this back coating that the PVC film can be tightly fused with the medium-density plate or other plates, and the glue will not be opened for ten or even fifteen years. And ordinary mask in the biggest problem is unable to solve the problem of film shedding. Since the entire production process is carried out at high temperatures (the temperature in the rolling machine reaches 220 degrees), this makes the PVC film have high light resistance and fire resistance, ensuring the high quality of the PVC film. Of course, this requires high production machines. Usually, the cost of production equipment for a production line is about 3,000 9 million marks, equivalent to about 0.16 billion yuan. But on the other hand, the production process of PVC film is quite simple, and the machine output is also very large, so comprehensively, PVC is actually a low-input, high-yield product.
3. extraordinary performance
What is the difference between PVC film and ordinary paste film? Ordinary paste film is directly attached to the surface of the plate with glue at room temperature, so after one or two years, the film is easy to fall off. The PVC film is the application of a special vacuum laminating machine at a high temperature of 110 degrees attached to the surface of the plate, so it is not easy to fall off.
Although PVC film has excellent quality assurance, but some people may say that PVC is a chemical product after all, it is not as natural materials, can not exclude toxicity and odor, but also inevitably cause harm to the environment. This is not the case. This is because the raw materials for the production of PVC film in Germany are specially refined, and toxic substances are completely refined. Therefore, PVC is completely non-toxic and tasteless, without any irritation to human skin or respiratory system. For those who are allergic to wood and paint, furniture or kitchenware packaged with PVC film is very suitable. By using PVC film as a decorative film, people can use a large number of medium dense board, particleboard, plywood and fiberboard, reducing the amount of wood used, thereby reducing the damage to the forest and the environment. From this point of view, PVC film has made a great contribution to the protection of the ecological environment.
The use of PVC once caused great controversy in Western countries, and many people tried to replace PVC with various other materials. However, it turns out that the quality of PVC is no less than that of other alternatives, and it is cheaper than these materials in terms of cost. Relevant experts have found through research that in many industries, giving up the use of PVC will result in considerable additional costs. Specific data show that the abandonment of the use of PVC will increase the additional cost of billions of marks. For specific consumers, this will mean a huge additional expense. With PVC as the surface material of the window, for example, if these windows do not use PVC, but the use of ordinary wood as the surface, then only a cleaning and maintenance will increase the cost of a staggering. In a small town in the UK, people have used wooden windows in the past two decades. Some people have investigated the cost of cleaning and maintenance of these windows and compared them with the cost of cleaning PVC windows. The results show that the cost of cleaning wooden windows is twice as high as that of PVC windows.

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