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June 15, 2018

Dispersant is an interfacial active agent with both hydrophilic and hydrophilic properties. The solid particles of inorganic and organic pigments which are difficult to dissolve in liquid can be uniformly dispersed. At the same time, the settling and condensation of so...

June 13, 2018

1. Grade of flame-retardant

Flame retardancy is a process that prevents or suppresses the rate of physical / chemical change during combustion of polymer materials. The flame-retardant grade of plastics was gradually increased from HBV-2V-1 to V-0, and the flame-retarda...

June 8, 2018

There are many auxiliaries in PVC pipe processing, the most important thing is that the selection is wrong and it is not used correctly. We should look at the material used for the performance of the pipe and the prescription for the material performance, otherwise, th...

June 7, 2018

Water immersion whitening. Many types of transparent PVC products show a white haze turbid appearance when they are in contact with water or steam for a long time. Soft goods are more powerful than hard ones. Due to water permeation, plasticizers, stabilizers, etc., ar...

June 6, 2018

PVC is widely used in shoes because of its high cost performance. However, the white soles often appear the phenomenon of color change and yellowing, especially in summer high temperature weather. In order to prevent the soles from yellowing, we should first make clear...

June 6, 2018

1. The setting and control of extrusion process temperature should be based on PVC-U melt plasticizing degree of 60% -65%, the melt temperature of screw tube should be controlled between 180 ℃ and 185 ℃, and the die temperature should be controlled between 190-210 ℃, s...

June 5, 2018

(1) PVC / polyester plasticizer

       

        Polyester plasticizer is a kind of polymer plasticizer used earlier. It is mainly prepared by condensation reaction between dicarboxylic acid and diol. There are kinds of adipic acid polyester...

June 1, 2018

        The formula of PVC plastic products is mainly composed of PVC resin and auxiliaries, and the additives are divided into heat stabilizer, lubricant, processing modifier, impact modifier, filling agent, aging agent, colorant and so on. Before designing the PVC fo...

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The role of the three functional zones of the PVC extruder

March 18, 2019

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