What is soft pvc raw material pvc resin?

PVC resin is a key raw material for soft PVC. PVC resin is a polymer formed from the polymerization of vinyl chloride monomer itself.

With raw PVC raw material of soft PVC, we first need PVC resin particles. These resin particles are the raw materials of many diverse soft and pliable products. Soft PVC uses a special type of PVC resin. It typically has a specific particle size distribution that affects the processing characteristics of the final mixture. Proper particle size gives good dispersion of other additives, resulting in a homogeneous and high - quality product.

One of the main characteristics of soft PVC via which PVC resin is used is the interaction with plasticizers. Plasticizers are added to PVC resin to make it soft and flexible. The PVC resin record the plasticizer molecules like a sponge. This absorption process modifies the resin's physical properties. PVC resin is a rigid and brittle material in its unplasticised state. However, when plasticizers (one type are called phthalates, but there are additional types of plasticizers, such as adipates) are added to the PVC resin, they fit themselves between the long polymer chains of the resin. This prevents the polymer chains from being bound together, decreasing intermolecular forces that exist, resulting in greater mobility of chains. This formulation allows the PVC to become soft, malleable, and elastic, which are definitive properties of soft PVC products. The grade of PVC resin also affect the durability and fromance of soft PVC products. Low - quality PVC resin has a more chaotic molecular structure. This has resulted in superior mechanical properties for the final soft PVC product due to a more organized structure. This can for example give improved tensile strength, making it so the soft PVC is less prone to breakage when stretching. It also impacts the tissue's reaction to environmental factors. A properly structured PVC resin can boost the heat, cold, and chemical resistance of soft PVC.

In general, in the manufacturing of soft PVC products, the PVC resin is mixed with the plasticizer and other additives. These might be stabilizers. In addition, PVC is susceptible to heat and light, so stabilizers are also indispensable. When PVC resin is processed at high temperatures (extrusion, injection molding, etc.) or exposed to sunlight over time, it can degrade without stabilizers. Deterioration may result in changes of color, loss of physical protection, and reduction of the product's lifespan. Stabilizers serve to diminish those degradation reactions by retarding them, which helps to preserve the purity of the PVC resin and the quality of the soft PVC. Another key factor is the pureness of the PVC resin. In relation to soft PVC, this can affect the proper processing when constraining to a recipe and its intended functionality. Another example is that when there's contamination in the PVC resin, it can lead to uneven absorption of plasticizers, which in turn can cause the final product to have varying softness and looks. As a result, the PVC resin constituents must be highly pure when used as a raw ingredient for soft PVC.

There are various grades of PVC resin which can be used for the production of soft PVC in the market. These grades are differentiated by the degree of polymerization of the resin, among other things. The molecular weight of the PVC resin depends upon its degree of polymerization. Typically speaking, the higher the molecular weight of the PVC resin, the better the mechanical properties of the final soft PVC product, although this can lead to increased levels of plasticizer needed to achieve softness. They select the grade of PVC resin used to manufacture soft PVC products such as soft vinyl toys, flexible hoses, and PVC leather.

Summary: soft PVC raw material PVC resin is the basis for producing all kinds of soft and flexible PVC products. It influences the mechanical properties, the dynamic interaction with plasticizers and other additives used as well as the quality of the finished product and how it looks. To meet their needs, manufacturers of soft PVC industry need to know the PVC resin properties of the resin to produce high - quality products.