What is a good, reputable Chinese UPVC door handle manufacturer?

What is a good, reputable Chinese UPVC door handle manufacturer?

Source: http://hehexin.com UPVC, also known as PVCU, is commonly referred to as hard PVC, which is an amorphous thermoplastic resin made by polymerization of vinyl chloride monomer plus a certain additive. In addition to the use of additives, the method of blending and modifying with other resins has been adopted, which has obvious practical value. These resins are CPVC, PE, ABS, EVA, MBS, and the like. UPVC has a high melt viscosity and poor fluidity, and even if the injection pressure and melt temperature are increased, the fluidity does not change much. In addition, the molding temperature of the resin is very close to the thermal decomposition temperature, and the temperature range in which molding can be performed is narrow, which is a material that is difficult to mold.

UPVC must be modified and granulated before it can be used. PVC is brittle, has poor thermal stability and is not easy to process which can’t be used directly, must be modified and mixed, add related additives, the most common modification is modified granulation. Strictly speaking, the PVC modified formula of PVC products with special requirements is tailored according to customer requirements. At present, the formulation design of domestic PVC modified materials, many products have been exported to foreign countries, obtained some independent intellectual property rights; UPVC particles after 24 hours at room temperature, the water absorption is less than 0.02%, so there is no need to dry. If it must be dried, it can be placed in a hot gas oven at 6070 ° C for 3 hours, or a dryer at 80 ° C for 1-1.5 hours.

Recycled materials can be mixed with up to 20% of the new material, depending on the end use of the product. Abuse of recycled materials can cause injection molding to fail, not only because there are too many recycled components, but also because the materials are reprocessed many times. The more the quality of the recycled material is recovered, the more it is recycled.

From what has been mentioned above, as far as I am concerned, a good, reputable Chinese UPVC door handle manufacturer has their own door handle factory which must have those advantages.