Magnesium hydroxide is used in the flame retardant PP we use. What are the specific production details? The following is a detailed introduction to you.
Magnesium hydroxide environmentally friendly halogen-free flame retardant is a common flame retardant. In addition to being flame retardant, it has smoke suppression properties and high dehydration temperature. It is more suitable for flame retardant modification of PP and other polymers with high processing temperature. It also makes flame-retardant plastics easier to recycle.
- When using magnesium hydroxide to flame retardant PP, in order to make the material reach UL94V-0 flame retardant grade (3.2mm sample), the dosage should be ≥ 60. However, if magnesium hydroxide is used to suppress smoke, the dosage can be lower, containing The smoke density of PP with 40% magnesium hydroxide is only about 1/3 of that of non-flame retardant PP.
- When the magnesium hydroxide content in PP reaches 65%, its mechanical properties, especially impact strength and elongation are significantly deteriorated.
- In order to prevent the mechanical properties of magnesium hydroxide flame retardant PP material from being greatly reduced, magnesium hydroxide with fine particle size, narrow and uniform particle size distribution should be selected as raw material, and double-coupling surface treatment should be carried out to improve the material’s properties. Rheological properties.
- All PP and toughening agent and the required amount of 60% magnesium hydroxide can be added to the mixing mixer for the first time and mixed for a few minutes, and then the remaining magnesium hydroxide can be added for the second time.
- When feeding, it should be noted that the feeding should be uniform and the measurement should be accurate.
The above is about the details of magnesium hydroxide making flame retardant PP.
