How do you mix PVC compound?
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How do you mix PVC compound?
According to the formulation, put the PVC resin, plasticizer, CaCO3, stabilizer and other auxiliaries into hot mixer mixing. After 6-10 mins discharge into the cold mixer (6-10 mins) for premixing. PVC compounding must use the cold mixer to prevent material stick together after the hot mixer.
What is the function of high speed mixer?
HS (High Speed) multi-purpose batch mixers handle every type of dough for biscuits, cookies and crackers. They offer high levels of automation, ease of use and cleaning, and outstanding reliability to guarantee low cost of ownership.
What is high speed mixing?
High-speed mixing is achieved in a completely integrated system in which ingredient weighing, mixing and dough development takes place rapidly and seamlessly. A batch of dough is typically mixed and developed in three minutes. While one batch is mixing, another is being weighed out.
How does a high shear mixer work?
Fluid undergoes shear when one area of fluid travels with a different velocity relative to an adjacent area. A high-shear mixer uses a rotating impeller or high-speed rotor, or a series of such impellers or inline rotors, usually powered by an electric motor, to “work” the fluid, creating flow and shear.
What plasticizers are used in PVC?
Most PVC plasticizers such as phthalates, adipates, glutarates, sebacates, phosphates, polymerics, trimellitates, and epoxy compounds are used. In those applications requiring high-temperature exposure as well as good flexibility at low temperature, high-molecular-weight adipates and sebacates offer good performance.
Why is plasticiser added to PVC?
Plasticisers. Plasticisers are compatible and involatile organic liquids that reduce the glass transition temperature of the PVC to below room temperature, thus producing a flexible polymer. The more plasticiser added, the more flexible the plastic.
How do you convert PHR to percent?
The following is an example of a recipe for rubber compounds:
- Ingredient phr. Crude rubber 100.
- Calculations of Antioxidant: 1/165 x 100% = 0.606%
- Calculations of Filler. 50/165 x 100% = 30.30%
- Calculations of Softener. 5/165 x 100% = 3.03%
At what speeds shear mixers can works?
8. At what speeds shear mixers can works? Clarification: The rotor works at a speed of the order of 3000 to 15000 r.p.m. and the clearance can be adjusted between 50 and 500 micrometers.
What plasticizer is used in PVC?
phthalates
A large number of plasticizers have been used with PVC, the most common family being the phthalates, especially, di(2-ethylhexyl)phthalate (DEHP)—(Figure 5.1).
What is PHR calculation?
To calculate phr, first convert the resin amount to 100 g. (5*20=100 g) Now, multiply the amine weight by 20 (20*1.24 = 24.8). So, the phr is about 25.
