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Changshu smooth formula of plastic products factory about the PVC plastic profile
by：CSSSLD
2021-01-23
Resin mixed with additives of homogeneous degree and the mixture will be the size of the apparent density of PVC impact strength greater impact.
PVC processing temperature has a certain range, the temperature is too high, PVC is easy to decompose;
PVC plasticizing temperature is too low, not fully, the various components of uneven dispersion can also lead to increased brittleness.
The host rotation speed reflects the shearing action of PVC, speed is too large, the shear stress increases, will reduce the strength of products of low temperature performance and welding Angle.
Forming high pressure to improve material mechanical properties, especially the impact strength at low temperature.
Profile shape cooling is to stretch the macromolecular chain in a timely manner after heating, meet the requirements of products.
Slow cooling can make the macromolecular chain has enough time to stretch, internal stress is small, so can reduce the warp of products, bending and contraction, thus improve the impact strength of the product and welding Angle.
Changshu below smooth formula of plastic products factory about the PVC plastic profile!
discuss formula cannot be separated from raw materials. The stand or fall of formula is not totally depends on the ratio of components, to a large extent depends on the internal performance and quality raw materials. With compound stabilizer, due to the different internal components, by coordination with other materials not affect the quality of material. So, discussing formulation, a kind of raw materials must be determined for each type and manufacturer, has practical significance. The author's day industry building materials company in xinjiang, has been using production of PVC resin, CPE use chemical products co. , LTD. Weifang yaxing, titanium dioxide using dupont ( DuPont） Product, therefore, this article just discuss compound stabilizer and incremental agent.
composite stabilizer is the most important kind of additive in PVC processing, the effect on all indicators of PVC profiles. The composite stabilizer stability and lubrication role. Stable role is to prevent the PVC molecular degradation in the processing and use process, to ensure the PVC profile can have Windows the required mechanical properties; The collocation of internal and external lubricants affect liquidity and viscosity, influence of PVC cold impact rate, Angle of welding strength, size, heating after state and surface finish.
at present, in the face of comprehensive price increases of raw materials market, decrease the cost of formula is many manufacturers happen to coincide choice, while lowering the cost of formula there are two main ways: use the lower prices of raw materials, such as the use of low prices stabilizing agent, modification agent, etc. ; Using incremental agent, commonly used is the price of low calcium carbonate. In addition to the incremental cost of calcium carbonate, but also has stable size; But along with the increase of dosage of calcium carbonate, profiles of inner index declined obviously.
discuss formula cannot be separated from raw materials. The stand or fall of formula is not totally depends on the ratio of components, to a large extent depends on the internal performance and quality raw materials. With compound stabilizer, due to the different internal components, by coordination with other materials not affect the quality of material. So, discussing formulation, a kind of raw materials must be determined for each type and manufacturer, has practical significance. The author's day industry building materials company in xinjiang, has been using production of PVC resin, CPE use chemical products co. , LTD. Weifang yaxing, titanium dioxide using dupont ( DuPont） Product, therefore, this article just discuss compound stabilizer and incremental agent.
composite stabilizer is the most important kind of additive in PVC processing, the effect on all indicators of PVC profiles. The composite stabilizer stability and lubrication role. Stable role is to prevent the PVC molecular degradation in the processing and use process, to ensure the PVC profile can have Windows the required mechanical properties; The collocation of internal and external lubricants affect liquidity and viscosity, influence of PVC cold impact rate, Angle of welding strength, size, heating after state and surface finish.
at present, in the face of comprehensive price increases of raw materials market, decrease the cost of formula is many manufacturers happen to coincide choice, while lowering the cost of formula there are two main ways: use the lower prices of raw materials, such as the use of low prices stabilizing agent, modification agent, etc. ; Using incremental agent, commonly used is the price of low calcium carbonate. In addition to the incremental cost of calcium carbonate, but also has stable size; But along with the increase of dosage of calcium carbonate, profiles of inner index declined obviously.
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