How do you find the K value of PVC resin?
K value Vs. Where, Xn – is the chain length of the polymer. Thus, the theoretical difference in softening point or Tg of K-57 and K-67 resin is 350.9°K-349.8°K = (350.9 – 273) – (349.81- 273)° C = 1 degree C.
What is K value of resin?
K-value. A characteristic of the PVC resin which describes the length of the polymer molecules. A measure of the molecular weight of PVC based on measurements of viscosity of a PVC solution. It ranges usually between 35 and 80.
What is K value in plastic?
K – Value is a measure of degree of polymerization or number of monomers in PVC chain or molecular weight. Since the % of PVC in films and sheets is predominant, its K value plays a very important role. K – Value has effect on properties of PVC resin, processing as well as properties of product.
What is PVC resin grade?
K65-68 are medium K value resin which are the most popular. They have a good balance of Mechanical properties and processibility. UPVC (Unplasticised or Rigid PVC) is made from the less porous grades while Plasticised Applications are best made from the more porous grades.
What is PVC K57?
Suspension PVC – K57 VYNOVA™ S5730 is a low molecular weight and low porosity vinyl chloride homopolymer produced by a suspension process.
What is the HS Code of PVC resin?
| HS Code | Item Description | Policy |
|---|---|---|
| 39 | Chapter 39: Plastics and articles thereof | |
| 3904 | Ploymers of vinyl chloride or of other halogenated olefins, in primary forms | |
| 39042210 | Plasticised: Poly (vinyl chloride) (PVC) Resins (emulsion grade) | Free |
| Free |
What is K in viscosity?
K value (viscosity), is an empirical parameter closely related to intrinsic viscosity, often defined in slightly different ways in different industries to express viscosity based estimate of statistical molecular mass of polymeric material used particularly for PVC.
What are K values?
K-value is simply shorthand for thermal conductivity. Thermal conductivity, n: the time rate of steady state heat flow through a unit area of a homogeneous material induced by a unit temperature gradient in a direction perpendicular to that unit area.
What is PVC resin used for?
Economical, versatile polyvinyl chloride (PVC, or vinyl) is used in a variety of applications in the building and construction, health care, electronics, automobile and other sectors, in products ranging from piping and siding, blood bags and tubing, to wire and cable insulation, windshield system components and more.
Is PVC resin hazardous?
Raw material for plastics processing industry. EC Classification Not classified as dangerous for supply/use. 3.1 chemical composition: Polyvinyl Chloride CAS No.: 9002-86-2; 99.7 % (Minimum). HAZARDOUS INGREDIENT(S) %W/W CAS No.
What are the different types of PVC?
There are two main types of PVC pipe, schedule 40 and schedule 80. What makes them different is the thickness of the pipe walls. A rule of thumb when it comes to PVC pipes is that the higher the number, the thicker it is. For instance, of the two, schedule 80 has thicker walls when compared to schedule 40.