A pipe compounder adds 0.2 phr of a new polyethylene wax and sees output rise by 6 percent. Three days later, impact tests fail at the weld line. That pattern is common because polyethylene wax is a...

A 0.30 mm plastisol coating on a polyester scrim spends around 90 seconds at 195 °C before it leaves the oven. Whether it comes out clear and flexible or hazy with a yellowed edge is usually settled...

A rigid PVC profile line that has run clean for two years can start showing a yellow edge at the die within one shift of adding three phr of CPE. Nothing else changed on the sheet. The stabilizer di...

Stress whitening, from the inside out Bend a rigid PVC pipe past its limit on a cold morning and the outer wall usually turns chalky white long before anything visibly cracks. The same thing happens...

A 60 mm PVC window profile leaves the calibration table, gets cut to length, and an inspector bends the offcut. It bows, then a milky streak spreads along the fold. Dimensional checks pass. Surface ...

A profile line that normally fuses in under three minutes starts running dry: the surface turns matte, head pressure swings by 15 bar, and the fusion peak on the torque rheometer arrives two minutes...

A pipe line running 900 kg/h rarely stops because the screw wore out. It stops because the compound ran out of thermal headroom two metres before the die. Brown streaks at the die lip, a sudden climb...

Every extrusion plant has watched it happen: a rigid pipe line running at 185 °C starts pushing yellow product within minutes of start-up, even though the resin lot and the screw speed have not chang...

"The surface looks better, but we are starting to see light yellowing at the weld lines, and the startup scrap rate has gone up." This is typical feedback from a rigid PVC extruder shortly after addi...

A truckload of suspension PVC resin arrives at the plant gate as a free-flowing white powder, and that powder is the raw starting point for pressure pipes, window frames, cable insulation, flooring, ...

Unstabilized PVC begins to release hydrogen chloride at temperatures far below the 180 to 200 °C that a compound reaches inside a working extruder, so the stabilizer you choose largely decides whethe...

Picture a flexible PVC sheet line running on a warm afternoon. The calender is turning smoothly, but the operator notices the edge of the web beginning to yellow, and a thin haze building up on the c...