Changshu smoothly da plastic products factory four points about PVC plastic different profile formula selection

PVC plastic different profile is the most important part of the plastic material in the family? Made of PVC plastic different profile is how? Changshu da plastic products factory smoothly PVC plastic different profile formula selection four points! PVC plastic different profile is generally do not add or less plastic plasticizer, this will cause the hard PVC plastic illiquid. And in the process of forming requirements of plastic in the viscous flow state, in order to make the plastic has a certain degree of liquidity, must improve the mold temperature. If more than the decomposition temperature of the PVC plastic can't normal operation. In formula design, therefore, must consider the characteristics of rigid PVC mold temperature and decomposition temperature is close to, try choosing a reasonable formula to make up for the defect. PVC plastic components in the recipe decays a certain relationship between each other, can't matching in isolation. When choosing auxiliaries, should fully consider various aspects factors. Considering the physical index is not change factors alone, often influence each other, restrict each other. Such as in order to improve the impact resistance of PVC, add rubber or elastic polymer are effective, but can cause reduced modulus, rigidity and heat resistance. As another example, to improve the thermal stability of PVC, it can improve the glass transition temperature of PVC chloride butyl. , however, the melting temperature & rsquo; 。 Also increase correspondingly, thus make the workability and fluidity significantly worse. Evaluate formula effect should be given priority to with products property index, physical property indexes and, of course, depends on the products use different environment and conditions, for example, according to the window frame used in indoor and outdoor environment, the different color, size, the required property index also differ. Rigid PVC system compared with other thermoplastic resin, the processing properties and physical property indexes by the formula of additives, mixing technology, and a greater influence on the forming conditions, the formula of hard PVC is a very complex and important work. Rigid PVC plastics formula made from PVC resin, stabilizing agent, modification agent, lubricant, filler, coloring agent and so on more than 10 kinds of additives made from mixing, choose the type and quantity of additives is different, can piece together into a different formula, the performance of the know of the complexity of the formula.