Sg-3 Sg-5 PVC Plastic Resins with Cheap Price Performance Pipe Grade

Polyvinyl chloride, abbreviated as PVC (Polyvinyl chloride), is a polymer made by polymerization of vinyl chloride monomer (vinyl chloride monomer, abbreviated as VCM) in the initiator, such as peroxide, azo compounds, or under the action of light, heat, and according to the free radical polymerization reaction mechanism. Vinyl chloride homopolymer and vinyl chloride copolymer are collectively called vinyl chloride resin.


PVC is an amorphous structure of white powder, small degree of branching, relative density of 1.4 or so, the glass transition temperature of 77 ~ 90 ºC, 170 ºC or so began to decompose, the stability of light and heat is poor, above 100 ºC or after a long period of exposure to sunlight, it will decompose and produce hydrogen chloride, and further autocatalytic decomposition, causing discoloration, physical and mechanical properties also decline rapidly, in practical applications must add Stabilizers must be added to improve the stability of heat and light.

Industrial production of PVC molecular weight is generally in the range of 50,000 ~ 110,000, with a large polydispersity, molecular weight increases with the decrease in polymerization temperature; no fixed melting point, 80 ~ 85 ºC began to soften, 130 ºC into a viscoelastic state, 160 ~ 180 ºC began to change into a viscous flow state; have good mechanical properties, tensile strength of 60MPa or so, the impact strength of 5 ~ 10kJ / m2; there are Excellent dielectric properties.

01 Composition

Polyvinyl chloride (PVC) is a polymer material that uses a chlorine atom to replace a hydrogen atom in polyethylene and is an amorphous polymer containing a small amount of crystalline structure. The structure of this material is as follows: [-CH2-CHCl-]n. PVC is a linear polymer in which most of the VCM monomers are linked in a head-tail structure. The carbon atoms are arranged in a sawtooth pattern and all atoms are linked by σ-bonds. All carbon atoms are sp3 hybridized.

02 Main classifications

According to the different applications, PVC can be divided into: general-purpose PVC resins, high polymerization PVC resins, and cross-linked PVC resins. General-purpose PVC resin is formed by the polymerization of vinyl chloride monomer under the action of an initiator; high polymerization PVC resin refers to the resin polymerized by adding a chain growth agent to the vinyl chloride monomer polymerization system; crosslinked PVC resin is the resin polymerized by adding a cross-linking agent containing dienophthalic and polypropylene to the vinyl chloride monomer polymerization system.

According to the vinyl chloride monomer to obtain the method to distinguish, can be divided into calcium carbide method, ethylene method and imported (EDC, VCM) monomer method (customary ethylene and imported monomer method collectively referred to as the ethylene method). According to the polymerization method, PVC can be divided into four major categories: suspension method of PVC, emulsion method of PVC, the body method of PVC, solution method of PVC.

Suspension polyvinyl chloride is the largest production of a variety, accounting for about 80% of the total output of PVC. Suspension PVC is divided into six models according to absolute viscosity: XS-1, XS-2......XS-6; XJ-1, XJ-2......, XJ-6.

The meaning of each letter in the model: X-suspension method; S-loose type; J-compact type.

According to the amount of plasticizer content, often PVC plasticene plastic is divided into: non-plasticized PVC, plasticizer content of 0; rigid PVC, plasticizer content of less than 10%; semi-rigid PVC, plasticizer content of 10-30%; soft PVC, plasticizer content of 30-70%; polyvinyl chloride paste plastics, plasticizer content of 80% or more.
 

     Hebei Aojin Import and Export Co., Ltd.. is a comprehensive enterprise integrating industry and trade.

    The main products are Graphite electrode,Petroleum coke ,copy paper and other plastic raw materials (ldpe, hdpe, lldpe, pvc, pva, pbt, eva abs, eps, gpps, hips, pc Pet, etc.).

     We will strictly check every link from raw materials to finished products to ensure the quality and stability of products. We also have our own professional design team, which can meet the needs of different levels of customers. All our products meet international quality standards and are well received in different markets around the world. We have a professional foreign trade team to expand overseas markets, can timely and properly deal with the problems raised by customers.
 

1.What information is needed to get a quotaion ?
    Size and Thickness and color
    Packing reques
   Purchase quantity

2. How many colors you have?
    we have more than 100 existed colors for your choice, we can send the color swatch if you leave your message.

3.How can I get a sample?
   We provide free samples for you checking the quality of color A4 paper, but the express cost need to be collected.

4.What's the best price you can offer?
   Please tell us the size, paper material and quantity you would like. And send us your design. We will give you a competitive price.
 
5.How about the delivery time?
   It is about 10-35 days after getting the deposits and confirmed order details.

6.How about the payment term?
   T/T or L/C ,Western Union , Paypal are accepted.

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