Many consumers will find that plastic water pipes are sometimes brittle and easy to break when using them. The brittleness of plastic water pipes has greatly affected the process of decoration Home piping Small editor - Berkeley Technology will take you to understand the reasons for the brittleness of plastic water pipe materials.

1. Excessive packing

normal Pipe manufacturer Through the optimized combination of formulas, the cost is reduced without reducing the quality; Some manufacturers have reduced the product quality while reducing the cost. Due to the composition of the formula, the direct way is to increase the filler. The filler commonly used in plastic water pipe materials is calcium carbonate, but its amount is not unlimited, and its proportion should be controlled. Some manufacturers now add calcium carbonate to 20-50 parts by weight to reduce the cost, This greatly reduces the physical and mechanical properties of the profile, resulting in pipe brittleness.

2. Type and quantity of impact modifier

The impact modifier is a kind of high molecular polymer that can increase the total fracture energy of PVC under the effect of stress. Therefore, PVC/ACR blend system should be used as far as possible in the formula. However, when CPE is used for modification and the amount is less than 8 parts by weight, the pipe will be brittle.

3. Too much or too little stabilizer

The role of stabilizer is to inhibit degradation, or react with released hydrogen chloride, and prevent discoloration of PVC during processing. The amount of stabilizer varies according to the type, but on the whole, excessive amount will delay the plasticizing time of materials, so that the materials will not be plasticized when they are exported to the mold. There is no complete fusion between molecules in the formula system, resulting in unstable intermolecular structure, When the dosage is too small, the relatively low molecular substances in the formula system will be degraded or decomposed, and the stability of the intermolecular structure of each component will be damaged. Therefore, the amount of stabilizer will also affect the impact strength of the pipe, and too much or too little will cause the pipe strength to decrease and cause the pipe brittleness.

4. Excessive amount of external lubricant

The external lubricant has a low solubility with the resin, which can improve the sliding between resin particles, thus reducing the friction heat and delaying the melting process. This effect of the lubricant is greater in the early stage of the processing process. The external lubricant is divided into early lubrication and late lubrication. Materials with excessive lubrication show a poor appearance under various conditions. If the amount of lubricant is not appropriate, It may cause flow marks, low output, turbidity, poor impact, rough surface, adhesion, poor plasticization, etc. Especially when the amount is too much, it will cause poor compactness and poor plasticization of the profile, resulting in poor impact performance and brittle pipes.

5. The hot mixing feeding sequence, temperature setting value and curing time also have decisive factors on the performance of profiles

There are many components in the PVC-U formula. The feeding sequence selected should be conducive to giving play to the role of each kind of auxiliary agent, improving the dispersion speed and avoiding its adverse synergistic effect, If the above links are not strengthened, the quality of pipe products will be affected. In some cases, the pipe will be brittle.

The above is what I shared with you about the causes of brittle plastic water pipe materials. I hope it will be helpful to you. If you need to know more about pipes, please continue to pay attention to Berkeley Technology.