How to Select PVC (Polyvinyl Chloride)
Polyvinyl Chloride (PVC) is one of the most popular chemicals known to man. It is composed of hydrogen, carbon, and chlorine and has been extensively used in many industries, including health, transportation, food packaging, electronics, and construction. The wide use of PVC in many of these industries is due to its effectiveness, durability, relatively low cost, and versatility. However, to get the most out of this polymer, it's essential to select the one that best suits your specific needs. To make the selection process easier, this article discusses factors you should consider when selecting your PVC.
Factors to Consider When Selecting PVC
The following are factors you should consider when selecting PVC
PVC comes in three major viscosity types which are high, low, and standard viscosity. The high-viscosity PVC is referred to as PVC SG3, while low-viscosity PVC is known as PVC SG8. The standard viscosity is usually referred to as PVC SG5.
- High viscosity: PVC Resin SG 1 to SG3 often produces high-grade electrical insulation materials. However, PVC SG3 can also be used to produce plastic products like artificial materials, films, and shoe-making materials.
- Low viscosity: These are mostly used to produce clear foil and hard injection molding. They can also be used to produce welding rods and hard boards.
- Standard viscosity: They are one of the most commonly used variants. They find applications in transparent products, selection bars, and decorative materials, including pipes, PVC windows, and rigid plates.
In cases where your client has not provided the viscosity rate, ensure you ask for their preference. However, some clients have no idea of the right option; in such cases, you can recommend standard viscosity (PVC SG5).
Before you decide on the right PVC to choose, it's crucial to have a good knowledge of where it will be applied. While PVC can be used in different industries, the exact purpose will determine the grade, k value, and other properties to select.
The importance of a reliable manufacturer in the selection process for PVC resin cannot be overemphasized. Due to its popularity, choosing the best can be a hard nut to crack. Therefore, if you're a novice, ensure you bring professionals along in your selection process. We recommend buying your PVC from Camachem, a reliable chemical supplier in China.
Methods of Manufacturing PVC
Generally, PVC resin can be manufactured using the carbide-base or ethylene-base method. While these two methods have different raw materials, their usage remains the same.
The carbide-base PVC uses coal, carbide, and crude salt as raw materials. It is produced by the acetylation of carbide and hydrogen chloride and the direct synthesis of vinyl chloride (VCM). The method involves a simple process with a lower cost of production and has developed rapidly, with its production capacity accounting for about 75% of the total domestic production capacity.
Raw material for carbide based PVC
The Ethylene-based PVC uses petroleum and chlorine as raw materials. It is obtained through ethylene chlorination. The method is widely used in North America, Western Europe, and the Middle East. Ethylene-based PVC resin also contains fewer impurities compared to carbide-based PVC. Therefore, it's sometimes a more preferred option.
Ethylene chlorination overview
Where To Buy PVC?
The choice of where to buy PVC depends on the quantity you are willing to buy. If you need a small quantity of PVC, you can contact local chemical stores in your neighborhood. However, if you need a large quantity of PVC, it is advisable to contact manufacturers and chemical distributors. Regardless of the country you are from, you can contact Camachem for the purchase of PVC in large quantities. The company is reputable for distributing high quality chemicals from China to clients across the globe.
With the numerous PVC options available, making the right choice can be difficult. However, with the help of the above information and the guidance of a reliable professional, you will be able to select the right PVC that meets your requirements.