pvc sg8

PVC SG8 is a low-viscosity grade of polyvinyl chloride with a lower molecular weight compared to SG3 and SG5. This grade offers enhanced rigidity and hardness, making it ideal for applications requiring more rigid structures. PVC SG8 maintains excellent chemical resistance to acids, bases, and salts, along with good thermal stability. Its low viscosity facilitates easy processing and molding into durable, high-strength products.

  • Molecular Formula : (C₂H₃Cl)ₙ
  • CAS Number : 9002-86-2
  • Grade : Tech Grade
  • HS Code :3904109090

What Does PVC Resin -SG8 Grade Mean?

PVC SG8 is a specific grade of polyvinyl chloride characterized by its low viscosity and lower molecular weight compared to other grades like SG3 and SG5. This grade offers enhanced rigidity and hardness, making it ideal for applications requiring more rigid and durable structures.

Applications of PVC SG8:

  • Bottles: The rigidity and strength of SG8 make it suitable for producing durable plastic bottles.
  • Sheets: Used in the manufacturing of rigid plastic sheets that require a hard and stable form.
  • Calendaring: Ideal for the calendaring process to produce uniform and durable plastic films and sheets.
  • Rigid Injection Molding: SG8’s properties allow for the creation of strong, rigid parts through injection molding.
  • Pipe Fittings: Used in making sturdy and reliable pipe fittings due to its high strength and durability.

Technical Parameters

ItemsSpecifications:Test ResultsUnit
K Value55-59--
Viscosity Number86-7383ml/g
Number of impurity particle 20max16%
Purity of volatiles including water 0.40max0.1%
Apparent density 0.50min0.54g/ml
Residue on sieve, 0.250mm sieve2.0max0.4%
Residue on sieve, 0.063mm sieve95min98%
Mesh number per/400cm2 30max18%
100Plasticizer absorption of PVC of 100g12min--
whiteness(160℃,10min later )75min81%
Water extract conductivity ---
Residual chlorethylene5max4ppm

Safety Is An Important Guarantee

Safety is our top priority. 

To ensure your safety while using PVC please be sure to download and carefully read the accompanying Material Safety Data Sheet (MSDS).

This document provides detailed safety guidelines, including how to handle potential hazards, accident response, and proper storage methods. It will help you understand and safely use PVC , ensuring personal safety and environmental protection.


PVC is typically packaged in 25kg bags, which come in two types of materials: standard and environmentally friendly.

When transporting PVC in containers, a small container can hold up to 17 tons, while a high cube container can accommodate up to 28 tons.

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The main differences between PVC Resin SG3, SG5, and SG8 are in their molecular weight and viscosity, which affect their processing and application:

  • SG3: This grade has the lowest molecular weight and is characterized by high plasticity and low viscosity. It is suitable for soft and flexible applications such as plastic films, artificial leather, and electrical insulation.
  • SG5: This is a medium molecular weight grade with balanced properties, making it the most versatile. It is commonly used in a wide range of applications, including pipes, fittings, and rigid profiles. SG5 offers good processability and mechanical properties.
  • SG8: This grade has the highest molecular weight, resulting in high rigidity and strength. It is ideal for applications requiring robust mechanical properties, such as pipes, fittings, and injection-molded products. SG8 provides excellent durability and chemical resistance.

PVC Resin – SG8 is a high molecular weight grade of PVC resin used for applications requiring high rigidity and strength. Its primary applications include:

  • Pipes and Fittings: Suitable for manufacturing strong and durable pipes and fittings used in plumbing and industrial applications.
  • Sheets and Panels: Used in the production of rigid PVC sheets and panels for construction and packaging.
  • Profiles and Extrusions: Ideal for creating rigid profiles such as window and door frames.
  • Injection Molding: Used in producing various rigid molded products due to its excellent processing characteristics.


 PVC Resin – SG8 exhibits several important properties that make it suitable for high-performance applications:

  • High Rigidity and Strength: Provides excellent mechanical properties required for durable products.
  • Good Processability: Easy to process using conventional PVC processing techniques such as extrusion and injection molding.
  • Chemical Resistance: Exhibits good resistance to chemicals, making it suitable for various industrial applications.
  • Thermal Stability: Maintains stability and performance under a wide range of temperatures.

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