Zhejiang Shifang Pipe Industry Co.,Ltd

Zhejiang Shifang Pipe Industry Co.Ltd is one of the most professional manufacturer and exporter of roof drainage system..

Teach you 5 ways to identify the quality of PVC raw materials
- Jul 17, 2018 -


Using the muffle furnace to burn ash

In the absence of attention, some PVC manufacturers even began to add a small amount of calcium powder, do you believe? There is a muffle furnace, you can check all your raw materials, oh, the economy is economical and good; what calcium carbonate, granular calcium, talcum powder, through the muffle furnace "samadhi fire".


Using melting point meter to measure melting point

One of the more important performance indicators of lubricants, such as the melting point of PE wax is generally at 105-110 degrees C, and some manufacturers are doped with paraffin or hardened oil, and the melting point will decrease.


Determination of raw material stability by torque rheometer

The use of rheometer is more extensive, it can determine the processability of ACR, and can also determine the stability of various raw materials. If the quality is different, the curve will be displayed, and the stability of the stabilizer can be measured. It can be described as a machine in the hand.


Detection of PVC by oven method

Some raw materials may be doped with PVC, the powder is difficult to identify, the use of oven comparison test, 150 degrees after a certain time, first color and red, the raw material may contain PVC.


Addition of smell judgment waste

If the raw material is smelling, maybe the raw material is adulterated with foreign foreign waste, or the use of cheap or inferior raw materials in the process of reproduction may not feel much of your production, but it has a greater impact on the performance of the product.