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Contact: manager Li. 

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Expertise in pvc

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Expertise in pvc

Date of release:2019-04-22 Author: Click:

The main ingredient of many plastic products is pvc, which is often referred to as polyvinyl chloride. 

Pvc is a resin material, it can be made into a variety of different products, such as packaging film, pvc plastic plate and so on. 

Let's take a look at pvc's expertise. 

Polyvinyl chloride (PVC) is one of the earliest industrialized resins in the world, and PVC plastic is one of the five general synthetic plastics. 

At present, it is the second only to polyethylene in the world, accounting for 29% of the total consumption of synthetic resin in the world. 

Since 2004, its output has exceeded polyethylene and polypropylene, jumped to the first place, and developed rapidly. 

PVC resin is a kind of white powder or particle, the particle size is 60 ~ 250 μ m, the apparent density is 0.40 ~ 0.60g / cm ~ 3, the density is between 1.35 and 1.45 g/cm3, the refractive index is 1.544 (20 ℃), and the water absorption is less than 0.5%. 

Insoluble in water, alcohol, gasoline, can swell or dissolve in ethers, ketones, chlorinated aliphatic hydrocarbons and aromatic hydrocarbons. 

Strong acid resistance at room temperature, resistant to any concentration of hydrochloric acid, less than 90% sulfuric acid, 50% 60% nitric acid and less than 20% caustic soda solution, stable to salt. 

If you can burn on a flame, leave the flame and extinguish it. 

The dielectric insulation property is good. 

PVC resin is composed of primary particles (also known as regional structure) of 200~500nm to form primary particles (also known as secondary particles) of 1 ~ 2 μ m, and then primary particles to form resin particles of 50 ~ 250 μ m. 

The crystallinity of PVC is about 5 to 10%, and the ordered structure generally exists in the center of the regional structure.

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PVC resin is a kind of amorphous, polar polymer, thermoplastic. 

The glass transition temperature is 75 ~ 105 ℃ according to the molecular weight. 

Because of its high softening temperature and melting temperature, pure PVC resin can only be plasticized at 160-210 ℃. Because of the polar bond between macromolecules, PVC shows hard and brittle properties. 

Moreover, when the temperature of the group containing chlorine in the molecule of PVC reaches 120 ℃, the dehydrochlorination reaction of pure PVC begins to occur, which will lead to the thermal degradation of PVC. 

Therefore, various auxiliaries such as stabilizer and plasticizer must be added in the processing before all kinds of PVC products can be produced. 

According to the content of plasticizer, PVC products can be divided into soft and hard products. Generally, the content of plasticizer is 0 to 5 parts as hard products, 5 to 25 parts as semi-hard products, and more than 25 parts as soft products. 

PVC plastics can be used for extrusion, injection molding, Calendering, blow molding and other methods of processing. 

However, during processing, kneading must be carried out first, so that all kinds of additives and PVC resin can be mixed evenly at 90 ℃ and 110 ℃. 

Compared with other general resins, the processing formula and processing technology are relatively complex. 

PVC plastic has good physical and mechanical properties, can be used in the production of building materials, packaging materials, electronic materials, consumer goods, etc., widely used in industry, agriculture, construction, transportation, power telecommunications and packaging and other fields. 

China's PVC consumption is mainly divided into two parts, one is soft products, 

Mainly includes wires and cables, various uses of film, floor materials, fabric coating, artificial leather, all kinds of hoses, gloves, toys, plastic shoes, as well as some special coatings and sealants. 

Second, hard products, including a variety of profiles, pipes, plates, hard films, bottles of hollow containers and so on. 

Jiangsu Wangke New material Co., Ltd., specializing in the manufacture of pvc plastic template, pvc skin foam template, skin foam template manufacturer.


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Contact

Jiangsu Wangke new materials Co.,Ltd

Tel:13141505998/13775442299

Email:jswkxcl@163.com

Web:www.jswkxcl.com

Add:No. 5 Donghai road, Haizhou development zone, Lianyungang city, Jiangsu province

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