PVC cable material is made of polyvinyl chloride as the basic resin, adding stabilizers, lubricants and inorganic

fillers, etc., through mixing, kneading and extrusion. Although its intermediary point performance is general and

not environmentally friendly, its price is low and the process is simple; PVC cable material is still one of the most

used cable materials.

When the PVC cable material is extruded, the following problems may be encountered. Today, Qingdao Sainuo

polyethylene wax manufacturer will discuss with you in detail how these phenomena are caused:

1. Scorch phenomenon during extrusion of PVC cable material

The mold outlet has a lot of smoke, strong irritating smell and crackling noise; there are particles of scorch on the

plastic surface.

what reason? How to improve?

(1) If the screw is used for a long time, the screw is not cleaned, and the accumulated burnt material is brought

out; remove the screw and clean it thoroughly.

(2) The heating time is too long, the plastic is aging and burnt; shorten the heating time, check whether the heating

system has any problems, and repair it in time.

2. Poor extrusion and plasticization of PVC cable material

The surface of the plastic has the phenomenon of toad skin, the surface is black, and there are tiny cracks or small

particles that have not been plasticized. There is an obvious mark at the seam.

what reason? How to improve?

(1) The temperature is too low; just increase it appropriately.

(2) When granulating, the plastic is mixed unevenly or there are particles that are difficult to plasticize in the

plastic; the mold sleeve can be appropriately small to increase the pressure of the glue outlet.

(3) The screw and traction speed are too fast, and the plastic is not completely plasticized; appropriately slow

down the speed to extend the heating and plasticizing time to improve the plasticizing effect.

(4) Material problems; Change materials

3. Cable material extruded pores and bubbles

what reason? How to improve?

(1) It is caused by the local super high temperature control; it is found that the temperature should be adjusted and

strictly controlled in time.

(2) Plastic damp or water caused; if it is found, stop using it and drain the damp material.

(3) The material drying device should be added; the material should be used after drying.

(4) The core should be preheated if it gets wet.

Qingdao Sainuo Chemical Co.,Ltd.  We are manufacturer for PE wax, PP wax, OPE wax, EVA wax, PEMA,

PEMA, EBS,  Zinc /Calcium Stearate…… Our products have passed the REACH, ROHS,PAHS,

FDA testing.

Sainuo rest assured wax, welcome your inquiry

Website：https://www.sanowax.com

E-mail：sales@qdsainuo.com

               sales1@qdsainuo.com

Adress：Room 2702,Block B, Suning Building, Jingkou Road, Licang District, Qingdao, China