Montan wax is a wax that improves the release and flow of filled PET. Due to the relative scarcity of Montan wax, synthetic waxes can be used for its application.
The 69 series of polyester waxes imported from Germany play an important role in improving the release and flow of filled PET, which is mainly used here for injection molding rather than spinning.
PET is an engineering plastic with mechanical properties, electrical insulation, creep resistance, chemical resistance, abrasion and fatigue resistance, but its impact resistance is poor and crystallization rate is low.
PET engineering plastics in the injection molding process due to poor liquidity, etc. will lead to poor gloss, color difference, appearance cracks and other problems
69 series polyester wax has very strong polar center of very long non-polar carbon chain. Similar to the structure of Montan wax, the part of its structure that is compatible with plastic in polarity plays the role of internal lubrication, and the part that is incompatible with plastic in polarity plays the role of external lubrication and mold release.
The flame retardant effect of aluminum hydroxide (ATH) and magnesium hydroxide (MDH) mainly depends on the dehydration effect of heat:
Since the bonding water contained in their molecules is similar, to be precise, AIC OH): contains 34.6% water, and Mg(OH)z contains 31.0% water, so their flame retardant effects are similar. Usually 25% or even higher addition amount is needed to achieve the required flame retardant effect. However, they are widely used because they are cheap, non-toxic, non-corrosive and smoke-suppressing. The flame-retardant ptfe modified pe wax difference mechanism of these two compounds reduces the temperature of the system for their dehydration endothermic effect. Therefore, when the decomposition temperature of the system coincides with their dehydration temperature, their flame retardant effect will be better. At present, the inorganic flame retardant mainly made of aluminum hydroxide is adopting modern engineering techniques such as surface treatment and micronization to improve its sun-burning performance, reduce its dosage and expand its application range.
As a synergist of halogen-based inorganic flame retardants, antimony trioxide has considerable consumption and is an indispensable inorganic flame retardant. Antimony trioxide (Sb2Og) is second only to alumina among metal oxides. The most widely used flame retardant. Sb2O itself has no flame retardant activity, so when it is used as a flame retardant, almost without exception, it is used in conjunction with chloride or bromide. A mixture of two or more flame retardants whose interaction may be additive, synergistic, or confrontational. The so-called synergistic effect means that the flame retardant effect of a mixture of two or more flame retardants is much more pronounced than the flame retardant effect of a single flame retardant. The combination of antimony oxide and halide is a typical example of synergy. The concept of synergy is very important, because high-efficiency synergistic flame retardants can obtain a cheap and high-efficiency flame-retardant system through a small amount of flame-retardant additives.
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