How To Identify PVC-U And UPVC?
About PVC everyone knows, so what is UPVC?
UPVC, also known as PVCU, is usually called hard PVC. It is made of vinyl chloride monomer polymerized amorphous thermoplastic resin plus some additives (such as stabilizers, lubricants, fillers, etc.). In addition to the use of additives, the method of blending with other resins is also adopted to make it of obvious practical value. These resins have CPVC, PE, ABS, EVA, MBS and so on. The melt viscosity of UPVC is high and the fluidity is poor. Even if the injection pressure and the melt temperature are increased, the change of fluidity is not significant. In addition, the molding temperature of the resin is very close to the thermal decomposition temperature, and the temperature range of the molding is very narrow. It is a difficult material to be formed.
How to identify PVC-U and UPVC? The difference in pipe material is:
Influence pipe material and equipment, the quality of these pipes. If these factors are the same in both domestic and foreign manufacturers.
1: first looks at the surface finish, and the whiteness.
2: a sample fall, easy to break a high calcium product is generally, of course, to meet your requirements of the appropriate price is possible.
3: take a sample foot on the edge of the pipe to see if it can be cracked or the elongation at break after the cracking. (usually you have to set the pipeline first, ha ha, otherwise people can not let you step on it)
4: resistance to Hou. The most direct way is to get the high temperature and high light for a few days to see the rate of change, but it is too waste of time. It's good to see the first 3 items.
The essence of PVC insulated bushing is a vacuum plastic film, which is used for surface packaging of various panels. Therefore, it is also known as decorative film and adhesive film, which is applied to many industries, such as building materials, packaging, medicine and many other industries. The building materials industry accounted for the largest proportion, sixty percent, followed by the packaging industry, and a number of other small range of applications.
PVC insulation casing is divided into two kinds of PVC water supply pipe and drainage pipe, which are used for municipal water supply and drainage, industrial water supply and drainage, civil water supply and drainage, irrigation, vegetation watering and so on.