PVC Resin K67

PVC Resin K67

PVC Resin K67

PVC Resin K67 is a rigid suspension PVC grade used widely in pipe, profile, and building material manufacturing. It offers moderate melt viscosity and high melt strength for efficient processing.

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Description

PVC Resin K67 belongs to the suspension-grade polyvinyl chloride (S-PVC) family. It is engineered for rigid applications like pipes, window profiles, and building materials. Because it offers balanced properties—adequate flow, strength, and stability—it serves as a go-to raw material for many plastic extrusion companies. Derived via suspension polymerization, K67 combines good processing behavior with reliable mechanical properties.

What is PVC Resin K67?

PVC Resin K67 is a type of polyvinyl chloride polymer primarily used in rigid applications such as pipes, fittings, and profiles. The “K67” refers to its polymerization degree, indicating a medium molecular weight that provides an excellent balance between rigidity and processability. This grade is widely used in extrusion and injection molding due to its high mechanical strength, good thermal stability, and smooth surface finish. It is typically supplied as a fine white powder and serves as a key raw material in construction, electrical insulation, and industrial product manufacturing.

Properties & Advantages

  • Moderate melt viscosity & high melt strength: K67 is easier to extrude for rigid parts without sagging or die drool.
  • Good mechanical strength: Suitable for pipes, profiles, and building components that demand rigidity.
  • Stable thermal performance: With additives and stabilizers, K67 resins maintain strength under typical service temperatures.
  • Low residual VCM ensures safety and compliance.
  • Balanced particle size and porosity help in consistent compounding and feeding.

Processing & Best Practices

  • Dry resin thoroughly before feeding to prevent bubbles or defects.
  • Use stabilizers and processing aids to protect against degradation at high temperatures.
  • Control melt temperature carefully; avoid excessive shear.
  • Maintain uniform feed and proper screw geometry for best extrusion results.
  • Clean equipment regularly to avoid residual contamination.

Why Choose PVC Resin K67

PVC Resin K67 stands out because it offers a balance between processing ease and performance. It is particularly suited for applications requiring rigidity, dimensional stability, and consistency. Many extrusion lines already use K67 as a standard due to its proven reputation and wide acceptance in the market.

 

 

Products

Applications of PVC Resin K67

PVC Resin K67 finds use in many sectors thanks to its balanced properties:

  • Pipe Manufacturing: Pressure and non-pressure pipes, irrigation, water supply systems.
  • Profile Extrusion: Window frames, door profiles, trims.
  • Building Materials: Panels, siding, decorative boards.
  • Compounding / Blending: Use as base resin to formulate rigid compounds with additives.

Because of its reliable flow and mechanical performance, many plastic extrusion companies prefer K67 for standard rigid PVC products.

Applications

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Main Features

Specification Description / Typical Value
Inherent Viscosity (I.V.) 0.90 – 0.94 dp/gm
Porosity (DOP method) 0.20 – 0.32 ml/gm
Apparent Bulk Density (A.B.D.) 0.49 – 0.56 g/cm³
Sieve Residue #40 (Retained) ≤ 1 %
Sieve Residue #60 ≤ 5 %
Sieve Residue #140 ≤ 25 %
Average Particle Size (APS) 150 – 170 μm
Residual VCM (RVCM) ≤ 1 ppm
Mass Loss ≤ 0.30 %

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