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July 18, 2017

1.hard PVC plastic profile is generally without or with small amount of plasticizer, which will inevitably lead to poor fluidity of pvc. In the process of forming, plastic is required to be in a viscous flow state. In order to make the plastic flow to a certain extent,...

July 17, 2017

PVC calendering transparent sheet is one of the main varieties of hard PVC. It is usually produced by conical twin-screw extruder. The problems encountered in the process of production are: bubbles,crystal spots, yellow color of sheet material and so on. I according to...

July 15, 2017

Plastic PVC granules  are one of the most widely used plastic materials.PVC material is a kind of non-crystalline material.Due to some shortcomings of its own performance, it is often used in practical use to include stabilizers, lubricants, auxiliary processing agents...

July 14, 2017

PVC plastic parts are cracks, mainly due to the plastic stress is too large or the stress concentration caused by the specific analysis is as follows.

1) Injection mold

①If the position of the top rod is incorrect or improperly installed, the ejection resistance increase...

July 12, 2017

I. Crack and Thread

(1) raw materials are not sufficiently dry. The pre drying temperature should be increased and the drying time should be prolonged.

(2) impurities in the raw material are mixed with foreign matter. Should be completely removed.

(3) the melt temperatur...

July 11, 2017

The rigid polyvinyl chloride tube (UPVC tube) has the following characteristics.

①Chemical resistance is good, no rusting.

②Self-extinguishing and flame retardation.

③Good aging resistance can be used between -15 ~ 60C for 30 to 50 years.

④ performance is good, volume resi...

July 10, 2017

Typically, the injection process refers to the plasticizing stage and the injection molding stage. Whether the injection is proper or not affects the appearance, performance and so on of the final product. The following two stages of the plastic phase of the main point...

July 7, 2017

1. Plasticizing Stage

          The stage of plasticization is the important process of melting material to the viscous flow which can be injected normally. The operating principle is: to ensure that the good physical properties of molding materials and have enough low...

July 5, 2017

Here are some resons for why the PVC profiles yellowing,pls kindly have a check.

  1. The problem of titanium dioxide,rutile type titanium pigment is the basic materials of PVC profiles,if you use the sharp titanium type titanium pigment,the profiles will be yellowing wi...

July 4, 2017

1. PVC (polyvinyl chloride) chemical and physical properties

Rigid PVC is to use one of the most common plastic materials.PVC material is a kind of an amorphous plastics.Often attend stabilizer smooth agent, auxiliary processing agent, pigment, impact resistant agent an...

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The role of the three functional zones of the PVC extruder

March 18, 2019

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