Description

PVC resin K65 is a white powder with an amorphous structure with a small degree of branching. The glass transition temperature is 77~90℃, and it begins to decompose at about 170℃. It has poor stability to light and heat, it will decompose to produce hydrogen chloride, and further autocatalytic decomposition, causing discoloration, and the physical and mechanical properties also drop rapidly. In practical applications, stabilizers must be added to improve the stability to heat and light.

The molecular weight of industrially produced PVC is generally in the range of 50,000 to 110,000. It has a large polydispersity. The molecular weight increases with the decrease of the polymerization temperature, 160 ~ 180 ℃ began to transform into a viscous flow state; good mechanical properties, tensile strength of about 60MPa, impact strength of 5 ~ 10kJ/m2; excellent dielectric properties.

Application

It is widely used in building materials, industrial products, daily necessities, floor leather, floor tiles, artificial leather, pipes, wires and cables, packaging films, bottles, foam materials, sealing materials, fibers, etc.

Specification

Polyvinyl Chloride Resin		SG3	SG5	SG8
Inspection item		Value
K value		72 - 71	68 - 66	59 - 55
Viscosity number		135 - 127	118 - 107	86 - 73
Number of impurity particles		≤ 16	≤ 16	≤ 20
Volatile content (incl. water)%		≤ 0.30	≤ 0.40	≤ 0.40
Apparent density		≥ 0.45	≥ 0.45	≥ 0.48
Particle size	≤2.0	≤ 2.0	≤ 2.0	≤ 2.0
Particle size	≥90	≥ 90	≥ 90	≥ 90
Number of Fish Eye (/400 cm2)		≤ 20	≤ 20	≤ 30
Plasticizer absorption of 100g resin		≥ 26	≥ 20	≥ 14
Whiteness (160, after 10 min.) %		≥ 80	≥ 80	≥ 75
VCM Residue PPM		≤ 3	≤ 3	≤ 3

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K67 Pvc Resin