Usually polyethylene PE, polypropylene PP plastic additives for film products, and select special raw materials.
Because the plastic melt of these two resins has good fluidity, it is easier to extrude and injection molding.
As long as the process conditions (temperature, pressure, speed, etc.) are reasonably controlled, the production can be smoothly produced.
In order to prevent the resin from being easily oxidized and degraded in the process of production and molding, a plastic masterbatch has been added before leaving the factory. Therefore, for products with no special use requirements, there is no need to add any plastic function additives to the resin during the production process.
When there are special requirements for the working environment of the product, the following plastic masterbatch should be added.
1. Select masterbatch according to their use
PE and PP products are used in working environments where they are often exposed to sunlight (UV).
To prolong the use time and prevent rapid degradation and aging, a small amount of UV absorbent was added to the resin before production.
According to the experience of masterbatch manufacturers, the commonly used UV absorbent is 2-hydroxy-4-octanoxy benzophenone (UV531), with an additional amount of 0.1-1.0% (mass fraction).
2.Antistatic masterbatch can eliminate the hidden danger of detonation
For PP or PE pipe used for conveying inflammable and explosive chemical articles, antistatic masterbatch conductive carbon black or SN, HZ14 etc. should be added into the resin before production.
According to the experience of plastic masterbatch manufacturers, the volume resistance of finished PE and PP pipe should be less than 10∧9Ω·cm, to eliminate the hidden danger of ignition and detonation due to static electricity.
3.Some products require added flame retardants
Flammable PE and PP products. If the product is used in a special environment, flame retardants should be added before resin production to ensure safe use.
Commonly used flame retardants include chlorinated paraffin, with a mass fraction of over 70% antimony trioxide (antimony white) and an equal amount of chlorine.
4.Slip masterbatch helps with the production
To reduce the friction between the molecules of the the material in the extrusion cylinder and the excess heat generated by the friction between the plasticized melt and the cylinder and the die, the formula should be added with slip masterbatch and lubricant.
According to the experience of slip masterbatch manufacturer, attention should be paid to the rationality of the amount of the slip masterbatch added: excessive addition of the slip masterbatch will affect the plasticization quality of the material; Excessive addition of external lubricants will not only affect product quality and yield, but also lead to mold exit precipitation of external lubricants.