Polyvinyl chloride film production raw materials and formula
DATE：2019/6/20 10:08:45 / READ： / SOURCE：This station
Polyvinyl chloride film production raw materials and formula
(1) Formulation equipment principle
1) Need for printing and packaging for film end use
2) The selection and ratio of various raw materials and additives should meet the physical and mechanical properties of the film.
3) Suitable for the stability requirements of the blow molding process.
4) Thermal stability, fluidity, impact and processing properties should be considered for polyvinyl chloride resins.
5) to ensure the smoothness and gloss of the surface of the product, low temperature resistance, aging resistance and opening.
(2) Selection of PVC resin The PVC shrink film is a semi-hard material. The average polymerization degree of the selected resin is between 1000-1100, the relative viscosity is 0.35 to 0.38, and the surface density is 0.47 - 0.57 g/cm3. Domestic resin is mostly used SG4, SG5.
(3) Additive selection
1) Plasticizer: Select a plasticizer that is resistant to low temperature and aging. DOP and DBP are commonly used in combination with epoxy grease (ED3), which increases the thermal stability of the compound. The addition of an appropriate amount of triphenyl phosphite (TPP) and epoxidized soybean oil-assisted plasticizer can also improve thermal stability.
2) Stabilizer: PVC shrink film for food packaging should use non-toxic stabilizer.
3) Toughening political agent MBS, its performance is transparent, and it can improve the impact strength.
4) Lubricating agent can choose zinc stearate, which can improve fluidity and lubricity, but the amount of addition should be appropriate. Too little lubrication is not good, which will cause retention and cause decomposition; too much will precipitate, which is not conducive to welding.
5) Adding a small amount of acrylate copolymer (ACR) can improve the fluidity of the material, and the product is smooth and shiny.
6) Appropriate amount of opening agent and anti-fogging agent should be added when needed.
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(1) Formulation equipment principle
1) Need for printing and packaging for film end use
2) The selection and ratio of various raw materials and additives should meet the physical and mechanical properties of the film.
3) Suitable for the stability requirements of the blow molding process.
4) Thermal stability, fluidity, impact and processing properties should be considered for polyvinyl chloride resins.
5) to ensure the smoothness and gloss of the surface of the product, low temperature resistance, aging resistance and opening.
(2) Selection of PVC resin The PVC shrink film is a semi-hard material. The average polymerization degree of the selected resin is between 1000-1100, the relative viscosity is 0.35 to 0.38, and the surface density is 0.47 - 0.57 g/cm3. Domestic resin is mostly used SG4, SG5.
(3) Additive selection
1) Plasticizer: Select a plasticizer that is resistant to low temperature and aging. DOP and DBP are commonly used in combination with epoxy grease (ED3), which increases the thermal stability of the compound. The addition of an appropriate amount of triphenyl phosphite (TPP) and epoxidized soybean oil-assisted plasticizer can also improve thermal stability.
2) Stabilizer: PVC shrink film for food packaging should use non-toxic stabilizer.
3) Toughening political agent MBS, its performance is transparent, and it can improve the impact strength.
4) Lubricating agent can choose zinc stearate, which can improve fluidity and lubricity, but the amount of addition should be appropriate. Too little lubrication is not good, which will cause retention and cause decomposition; too much will precipitate, which is not conducive to welding.
5) Adding a small amount of acrylate copolymer (ACR) can improve the fluidity of the material, and the product is smooth and shiny.
6) Appropriate amount of opening agent and anti-fogging agent should be added when needed.
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Author：admin