Suspension PVC process: (K-value or IV (Intrinsic viscosity) characterizes MW) VCM polymerized in water where PVC grains are maintained in suspension with dispersion agents (PVC, surfactants, emulsifiers, etc.)

Polyvinyl chloride (PVC) formulated with two different stabilizer systems (Ca/Zn stearates and dibasic lead phthalate) irradiated at 75 kGy at two different dose rates were studied in order to...

Formulating blends of PVC resin with other ingredients or “compounding”, as it is called in the industry, to produce rigid PVC building products has been going on for decades. A great deal of information is known about the effects of various ingredients and it is up to the formulator to

PVC, Polyvinyl chloride, is the world’s most versatile plastic and is widely used in profiles, pipes, cables and other plastic articles. Its versatility is due to the

Every oxidized polyethylene wax is different, and their impact on rigid PVC rheology is very complex. In general oxidized polyethylene wax helps to moderate melt temperatures and improve metal release. Lower carbon number paraffin waxes (C-28 and below) increase the speed of PVC fusion, become soluble in rigid PVC, and tend to soften the melt.

Polyvinyl chloride (PVC, vinyl) became a major factor in commercial manufacture of flexible goods after World War II, replacing rubber, leather, and cellulosics in many areas.

The basic general principles of formulating a PVC composition (Le. deciding on the nature and proportion of its constituents) are relatively straightforward. However, successful practice calls for a great deal of specialist knowledge and experience. Note: Nowadays many PVC processors buy-in compositions from

Poly vinyl chloride (PVC) is similar to many other materials in that it is affected by weathering. This applies not only to other plastics, but also materials like timber and metals.

Most commercial grades, and many experimental plasticizers, have been evaluated in PVC over a wide range of levels (phr). The disciplined cataloguing of the performance properties allows for easy comparisons of cost effective formulating options at specified hardness values as well as at specified plasticizer levels.

Results strongly indicate that the reduction of 5 phr from the formulation down to just 1 phr (which is simply the removal of fuel) raised the LOI by 4 units.