Views:1 Author:Site Editor Publish Time: 2021-04-09 Origin:Site
PVC compounds are used for many things, it can be said that it is a thermoplastic, that is, when heated, it can change shape. This means you can turn it into all kinds of exciting things. It can be rigid or flexible, depending on its thickness and composition. Remember the plastic wrap you used to cover the leftover salad in the refrigerator? Plastic wrap is also made of certain compounds. Speaking of manufacturing, dozens of companies around the world use PVC counter rotating twin screw extruder to manufacture products in the fields of footwear, plastic wrap, automobiles, and even the medical field. So, when most companies like you are looking for raw materials, it is usually because you are either looking for PVC compounds or what some might call vinyl compounds.
The following knowledge points are listed below:
l General about the pvc compounding
l How pvc resin transformed into pvc compound
PVC resin is actually in powder form and cannot be used alone. It is generally modified.
Pvc compound (polyvinyl chloride mixture) is polyvinyl chloride powder. In actual use, stabilizers, lubricants, auxiliary processing agents, pigments, anti-vibration agents and other additives are added.
In the extrusion process, no granulation is generally required. If the particles produced by the PVC compound are in use, the effect will be better, because in the granulation process, full mixing, both the uniformity and the plasticizing performance are the best. In the molding process, the particles are generally used . It has the requirements of non-flammability, high strength, excellent weather resistance and geometric stability, as well as special requirements for oxidants, reducing agents and strong acid resistance. The prepared PVC compound must meet the above-mentioned particulate matter and particulate PVC compound.
PVC compound extruding machines are divided into two categories: soft, PVC, composite (soft polyvinyl chloride mixture) and rigid polyvinyl chloride, composite (rigid polyvinyl chloride mixture). The main difference between the two is increased the use and quantity of plasticizer are different. Soft, polyvinyl chloride, compound must cause the use of particles, and the corresponding processing temperature is relatively low. Rigid polyvinyl chloride (PVC) is a widely used engineering plastic. When the rigid polyvinyl chloride compound is not used at all, we call it "UPVC"
How pvc resin transformed into pvc compound
The definition of a compound is a substance formed by the chemical combination of two or more elements. But how is PVC resin converted into vinyl compound?
Develop new compound formulations to meet application requirements or processing constraints. Chemists and formulation engineers create customized compounds by mixing various additives, modifiers and stabilizers with PVC resins to obtain specific properties.
The difference between hard polyvinyl chloride and soft PVC compound is plasticizer in a word.
Rigid PVC compounds are sometimes classified as rPVC or uPVC (unplasticized)-with high hardness, excellent mechanical properties and high melting point. These materials work well in certain applications, such as decks and railings or pipe fittings, but there are also other applications that require the use of less rigid and more plastic materials.
Flexible PVC compound extruding machines are formulated to meet performance requirements in applications such as medical pipes, wires, car body side molds, and garden hoses to name a few. They also formulated the processability requirements of our customers. Soft polyvinyl chloride compounds contain plasticizers and softeners that help give them "rubber-like" properties.
Market demand, scientific progress, regulatory guidelines, and raw material economy have forced R&D technicians and formulation engineers to work hard to find more versatile and cost-effective materials for custom compound formulations. Due to its inherent versatility, vinyl compounds have proven to be very cost-effective materials in many markets and applications.
So, after reading this article you may probably have some basic knowledge about the PVC compounding process.