There are many grades of PVC. The viscosity or K value commonly used in the industry indicates the average molecular weight (or average degree of polymerization) of PVC, that is, the length of the PVC molecular chain, which determines the grade of the resin and the corresponding processing parameters. The molecular weight of the resin is related to the physical and mechanical properties of the product.
PVC used to be the largest general-purpose plastic in the world, and it is widely used. It is widely used in construction materials, industrial products, daily necessities, floor leather, floor tiles, artificial leather, pipes, wires and cables, packaging films, bottles, foam materials, sealing materials, fibers, etc
SG3 (K-70, S1300): mostly used for soft products, hoses, wires and cables, films, shoe materials, toys, auto parts etc.
PVC RESIN SG3 has high purity, less fish eyes, easy to blister, high temperature resistance, insulation, soft product texture, etc. It is mainly used to produce soft products such as wires and cables, agricultural films, conveyor belts, and daily plastic products.
PVC RESIN SG3,Pvc Resin Sg3 Sg5 Sg8,Pvc Resin K70,Pvc Resin Powder Sg3,Suspension Pvc Resin Sg3 Henan Shunbang Chemical Industry CO.,Ltd , https://www.sbcpe.com
PVC Resin is a kind of non-crystalline linear polymer compound. The larger the relative molecular mass, the higher the viscosity, the higher the molecular weight, and the higher the tensile strength, impact strength, and elastic modulus of the product, but the flow of the resin melt Decline in sex and plasticity. The viscosity number is usually used to indicate the molecular weight of the polymer, and the polymer model is divided
Problems with the Old Selection Criteria for Traps: After seven years of monitoring and experimentation on Trap Performance at the Royal Bank of Chemical Industry in Huddersfield and Grangemouth (England), the first experiment at two manufacturers Based on the monitoring and experimentation of the trap performance and fresh steam loss carried out by the Chamber, Royal Chemical Industry Chemical eventually modified the selection of the trap in its Engineering Design Guidelines. After the change of the new "guidance" includes trap selection table. The old selection criteria for traps have a number of drawbacks, most notably the lack of reference to the type of hydrophobic equipment and methods of hydrophobicity. The chosen trap often does not match the actual load. In particular, thermodynamic disc traps, the foundations of the old selection criteria, were mistakenly considered as universal traps by people, especially shop floor personnel. Experiments revealed many problems with the old selection criteria of traps: 1, the steam in charge of the trap life is too short. 2, trap performance has lapsed, and the actual load selection does not match. 3, as the most widely used thermodynamic disc traps, the worst energy-saving, but also with inverted bucket traps, the life expectancy is very short. 4, bimetal traps easily unstable. Second, trap selection techniques: The new "guidance" includes the trap selection table. Steam traps selection tips: 1, inverted bucket traps: As the first choice for all process loads and steam main traps, that is, all the need for steam hydrophobic occasions. 2, Float thermostatic trap: used for process hydrophobicity, especially in applications with controlled loads of up to 50 kg (50psig) or with high air contents and problems with inverted bucket steam traps. 3, the balance pressure trap: used as an important heating or heating system. 4, bimetal thermosyphon trap: for heating pipelines or heating system low temperature or frost conditions. This type of trap allows to maximize the use of sensible heat in the condensate or to prevent overheating of the product. The valve body is all stainless steel. 5. Thermodynamic Disc Traps: As an alternative to inverted bucket traps, as long as proven by previous experience, they are used with limited liability on steam supervisors and tracing pipes under pressures up to 17 kg, or as products Replace for higher vapor pressure. Not recommended because of its low energy efficiency and short lifetime (and not allowed at Huddersfield and Grangemouth). 6, in the heat less demanding occasions, with the thermostatics steam trap to replace the thermodynamic disk will improve the energy saving effect, while ensuring the service life. 7, mechanical traps (that is, inverted bucket and float trap) both in condensate load or load is small, can ensure that the steam does not contain condensed water, and thermosyphon trap in the load increases when the accumulation of condensation water. More Search Keywords: Traps