Company Profile
Weifang Phoenix New Material Co., Ltd
Weifang Phoenix New Material Co., Ltd is a high-tech chemical enterprise integrating research and development,
production, sales and technical services. Headquartered in Weifang, Shandong Province. Its production facilities are
ocated in Weifang Binhai Chemical Industry Park, a state-approved chemical industry park.
Our mission is to be the leading sustainable "one-stop shop" chemical solutions company, providing customers
with innovative, science-led, differentiated products and solutions. To this end, we provide a safe and healthy working
environment for our employees and comply with all local, national and international regulations.
Product Parameters
| Parameter |
SG3 |
SG5 |
SG7 |
SG8 |
| Vloatile content incl.water (%≤) |
0.3 |
0.4 |
0.4 |
0.4 |
| Apparent density (≥) |
0.42 |
0.48 |
0.48 |
0.5 |
| Number of Fish Eye 1400cm2 (≤) |
20 |
20 |
30 |
30 |
| Plasticizer absorption of 100g resin(≥) |
26 |
19 |
12 |
22 |
| VCM Residue PPM (≤) |
5 |
5 |
5 |
5 |
| K-Value |
72-71 |
66-68 |
62-60 |
59-55 |
| Polymerizing Index |
1300+/-50 |
1000+/-50 |
800+/-50 |
700+/-50 |
Number of impurty particl
(≤) |
16 |
16 |
20 |
20 |
| Whiteness(160ºC after 10 min)(%≥) |
78 |
78 |
75 |
75 |
PVC SG7 (polyvinyl chloride resin SG7) is mainly used to produce hard products, including plates, sheets, transparent sheets, etc.
Its specific uses include but are not limited to the following aspects:
Plates and sheets : PVC SG7 can be used to produce various plates and sheets, suitable for occasions requiring high strength and durability
Transparent sheets : Due to its good transparency and processing performance, PVC SG7 is also often used to produce transparent sheets, suitable for products requiring high transparency
Pipes and profiles : Although PVC SG7 is mainly used for hard products, it can also be used to produce pipes and profiles in certain specific applications
PVC resin models and their characteristics PVC resin has a variety of models, and different models are suitable for different application scenarios. The following are several common models and their characteristics:
SG3 type: Mainly used for making soft products, such as artificial leather, film, cable, soles and foam materials, etc.
SG5 type: General resin, suitable for foam materials, pipes, profiles, plates, etc.
SG7 type: Used to produce hard products, such as plates, sheets, transparent sheets, etc.
SG8 type: Also used for hard products, mainly used for the production of plates, sheets, pipes, foamed plates, etc.
Application areas of PVC resin
PVC resin is widely used in construction, medical, automotive and other fields due to its corrosion resistance, electrical insulation, flame retardancy, light weight and high strength.
For example:
Construction: PVC materials are often used to make doors, windows, floors, wall panels, etc., because they have good weather resistance and are easy to process.,
Medical: PVC materials are used to make medical devices and packaging materials because they are non-toxic and easy to clean.
Automobile: PVC is used for automotive interior and exterior decoration because of its good formability and durability.
According to different application scopes, PVC can be divided into: general-purpose PVC resin, high-polymerization PVC resin, and cross-linked PVC resin.
General-purpose PVC resin is formed by polymerization of vinyl chloride monomer under the action of an initiator; high-polymerization PVC resin refers to a resin formed by adding a chain extender to the polymerization system of vinyl chloride monomer; cross-linked PVC resin is a resin formed by adding a cross-linking agent containing diene and polyene to the polymerization system of vinyl chloride monomer.
According to the method of obtaining vinyl chloride monomer, it can be divided into calcium carbide method, ethylene method and imported (EDC, VCM) monomer method (it is customary to refer to ethylene method and imported monomer method as ethylene method).
According to the polymerization method, polyvinyl chloride can be divided into four categories: suspension polyvinyl chloride, emulsion polyvinyl chloride, bulk polyvinyl chloride, and solution polyvinyl chloride.
Suspension polyvinyl chloride is the largest variety, accounting for about 80% of the total PVC production. Suspension polyvinyl chloride 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, PVC plastics are often divided into: non-plasticized PVC, plasticizer content is 0; hard PVC, plasticizer content is less than 10%; semi-hard PVC, plasticizer content is 10-30%; soft PVC, plasticizer content is 30-70%; polyvinyl chloride paste plastic, plasticizer content is more than 80%. Hard PVC and soft PVC
PVC modification method
PVC resin is a polar non-crystalline polymer with a density of 1.38 g/cm3 and a glass transition temperature of 87°C. Therefore, it has poor thermal stability and is difficult to process.
It cannot be used directly and must be modified and mixed before it can be used.
Due to the different types and fractions of the added additives and fillers, the performance and requirements of the prepared PVC materials are different.
We usually call it PVC formula, which is strictly speaking a PVC modified formula, and PVC can only be used after modification. This category is often classified as polymer modified materials.
The modification of polymer materials mainly focuses on the research of high performance of general plastics, the transformation of single-component materials to multi-component composite materials (alloys, blends, composites), giving materials functionalization, optimizing performance and price, etc.
The modification methods are mainly chemical modification, filling modification, reinforcement modification, blending modification and nano-composite modification.
The basic principle of modification is to give materials functions or improve certain properties through additives .
Therefore, the level of PVC formula technology determines the level of technology and production capacity of a factory. PVC generally needs to be modified and granulated first.
After being prepared into particles with a screw extruder unit, the plasticization is more complete and the processing is easier, especially for products that are injection molded.
The screw extruder is one of the most important equipment for plastic molding and processing. It uses external power transmission and heat transfer of external heating elements to carry out solid conveying, compaction, melting, shear mixing and extrusion molding of plastics.
Screw extruders occupy an important position both as plasticizing and granulating machinery and as molding and processing machinery. Strictly speaking, PVC products with special requirements and PVC modified formulas are tailored to customer requirements.
There are also copolymer derivatives in the PVC production process. Such modified varieties include vinyl chloride copolymers, polyvinyl chloride blends and chlorinated polyvinyl chloride, etc.
Product Description
Polyvinyl chloride (PVC) is the third largest synthetic polymer plastic in the world (after polyethylene and polypropylene), with an annual production of about 40 million tons of PVC. PVC is a polymer formed by the free radical polymerization mechanism of vinyl chloride monomer (VCM) in the presence of initiators such as peroxides and azo compounds or under the action of light or heat. Vinyl chloride homopolymers and vinyl chloride copolymers are collectively referred to as vinyl chloride resins.
PVC was once the world's largest general-purpose plastic with a wide range of applications. PVC is available in two types: rigid (sometimes abbreviated as RPVC) and soft. Rigid polyvinyl chloride is used for building pipes, doors and windows. It is also used to make plastic bottles, packaging, bank cards or membership cards. Adding plasticizers can make PVC softer and more flexible. It can be used for pipes, cable insulation, flooring, signs, phonograph records, inflatable products and rubber substitutes.
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