Application of barium sulfate in PVC pipe

After deep processing, barite ore can produce a variety of barium sulfate products, including precipitated barium sulfate, high light barium sulfate, ultrafine barium sulfate and nano-barium sulfate. These products not only meet the needs of various industries, but also have great potential for the plastics and rubber industry. As a very cost-effective filling material, barium sulfate is gradually increasing in practical applications.

Barium sulfate has multiple advantages, including strong chemical inertness, good stability, acid and alkali resistance, moderate hardness, high specific gravity, high whiteness, and absorption of harmful rays. Therefore, it is widely used in various fields, including plastics, rubber, coatings, high-grade ink, chemical, paper, ceramics, pigments and so on. The addition of barium sulfate can improve the hardness and strength of the product, enhance the heat resistance and wear resistance, and make it become one of the functional filling materials with broad development prospects.

The filler originally used for the production of PVC pipes/fittings is directly borrowed from the experience of the rubber industry, using barium sulfate. Therefore, to date, many PVC pipe/fitting manufacturers insist on using barium sulfate as a filler. According to industry practice to distinguish PVC pipe and pipe fittings, generally speaking, the linear, cylindrical shape used to build the pipe is called the pipe, and the transfer head used to connect the pipe is called the pipe. Because the structure of the pipe is much more complex than the pipe, the manufacturer who produces the pipe may not necessarily produce the pipe, because the production of the pipe requires higher process requirements and investment costs.

According to production experience, the barium sulfate powder used for the production of drainage pipes is usually between 325-1250 mesh, and the fineness of the barium sulfate powder selected depends on the specific needs of the pipes and the amount of addition. In general, when adding 200-300 barium sulfate powder, 400-600 purpose barium sulfate can be selected, and when adding less than 200 parts, 800-1250 purpose barium sulfate can be selected. In addition, in the manufacture of PVC irrigation pipes, superfine barium sulfate treated with 1250-1500 mesh can be used as a filler; For power pipes, 300-400 mesh of slightly lower grade barium sulfate can be used as a filler; In the production of threaded tubes, 1250-2500 purpose barium sulfate or modified barium sulfate can be used as a filler.

In the manufacturing process of pipe fittings, powder injection molding or injection molding after granulation can be used. In the selection of barium sulfate filler, you can decide according to the specific needs, choose to use nano-barium sulfate or modified barium sulfate. However, the specific choice should depend on the quality requirements of the pipe fitting manufacturing enterprise. At present, companies producing powder injection molded pipe fittings can choose modified barium sulfate or conventional barium sulfate to obtain good appearance and quality, which can usually meet the effect of light calcium. However, it is recommended to choose a superfine barium sulfate powder of more than 1250 mesh when trying to get better results.

Barium sulfate, simple production process, powder quality consistency is good, strong stability, stable water control. These basic conditions are conducive to the production process adjustment of downstream pipe enterprises. The most important thing is the low cost, which is a good choice for pipe companies.