1, by adding a certain amount of homopolymer PP toughening additives according to tablets made by blending, this material is called PP-H.

2, using PP and PE block copolymer, this material is called PP-B.

3, the use of advanced technology gas copolymer, PE in the molecular chain of PP random, evenly carried out polymerization, the material known as PP-R. Used for the production of PP-R plastic pipe extruder screw drums, use sophisticated computer models to determine the precise calculation of the paragraphs of the pressure distribution, melting rate, is its ability to have a good low-temperature plastics. The ordinary single-screw extruder can not be expected to be used to produce PP-R pipe.

Currently on the market 70-80% PP-R pipes are not the real PP-R pipe. In order to help the user from the initial recognition on the shape and feel the authenticity of PP-R pipes and pipe fittings. <BR> can refer to the following identification methods:

1) Product Name: PP-R products should be "hot and cold water with the polypropylene pipe" or "hot and cold water with the PP-R pipe" where the labeled ultra-fine particles modified polypropylene tubes (PP-R) or PP -R cold water pipes, hot water pipes, PP-E tubes, etc., are non-formal name of the pseudo-PP-R pipe.

2) Product testing unit is a non-professional units, the test item content and PP-R pipe does not match the standard set out in the content, products, or products recommended departmental promotion department, for PP-R product standards do not understand or without PP-R standard departments Certificates are issued by pseudo-PP-R.

3) PP-R is not the density slightly larger than the density of PP-R.

4) PP-R pipe into a white or other colors matt matt, pseudo-PP-R pipe shiny and bright or colorful.

5) PP-R pipe completely opaque, pseudo-PP-R pipe slightly translucent or semi-translucent.

6) PP-R pipe soft touch, pseudo-PP-R pipe feel smooth.

7) PP-R pipe landing sound more boring, pseudo-PP-R pipe landing sound more crisp.

The real PP-R pipe should conform to the standard ISO / DIS 15874.2-1999 "hot and cold water with a plastic piping systems PP-R second part of the pipe" and pipe fittings performance is not pass the above criteria. It should be noted that the pseudo-life of PP-R pipe is only 1-5 years, while the real life of PP-R pipes are more than 50 years.

In order to prevent PP with the norms of raw materials and production equipment produced shoddy PP-R pipe into the project, the need for increased management efforts to regulate building materials market, the professional PP-R pipe production factories and enterprises carry out effective supervision and control.