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Analyze the characteristics of construction plastic formwork from raw materials

Today, let us analyze the characteristics of waterproof, flame-retardant and impact-resistant pp construction plastic formwork from the raw materials.

Features of polypropylene: non-toxic, odorless, low density, strength, stiffness, hardness and heat resistance are better than low-pressure polyethylene, and can be used at about 120 degrees. It has good electrical properties and high-frequency insulation is not affected by humidity. It is not easy to age, and is suitable for manufacturing general mechanical parts, corrosion-resistant parts and insulating parts. Ordinary acid and alkali organic solvents have little effect on it and can be used in food utensils.So being used in pp hollow construction plastic formwork can improve its toughness and turnover rate.

Molding characteristics:

1. Crystalline materials have low wettability and are easily decomposed due to long-term contact with molten iron.

2. It has good fluidity, but has a large shrinkage range, but is not prone to shrinkage, dents and deformation.

3. The cooling speed is fast, the pouring system and cooling system should be slowly discharged, and the molding temperature should be controlled. When the material temperature is low temperature and high pressure, it is easy to orient.

4. Due to the uniqueness of the production process, the plastic wall thickness is relatively uniform.

pp features:

1.PP is a semi-crystalline material. It is harder than PE and has a higher melting point. Since the temperature of homopolymer type PP is very brittle when the temperature is higher than 0, many PP materials on the market are random copolymers with an ethylene content of 1 to 4% or clamped copolymers with a higher proportion of ethylene.

2. Polymer type PP materials have lower heat distortion temperature (140°C), lower transparency, lower gloss, lower rigidity, but stronger impact strength. The strength of PP increases with increasing ethylene content. The Vicat softening temperature of PP is 150. Due to its high degree of crystallinity, this material has excellent surface stiffness and scratch resistance. There are no environmental stress cracking issues in PP. Typically, PP is modified by adding glass fibers, metal additives or thermoplastic rubber.

3.The MFR of the flow rate of PP is 1 to 40. Low MFR PP materials have better impact resistance but lower elongation. For materials with the same MFR, the strength of the copolymer type is higher than that of the homopolymer type.

4. Due to crystallization, the shrinkage rate of PP is very high, usually 1.8% to 2.5%. And the directional uniformity of shrinkage is much better than that of PE-HD and other materials. Adding 30% glass additive can reduce the shrinkage to 0.7%.

5. Both homopolymer and copolymer PP materials have excellent moisture absorption resistance, acid and alkali corrosion resistance and dissolution resistance. However, it is not resistant to aromatic hydrocarbons such as benzene solvents, chlorinated hydrocarbon (carbon tetrachloride) solvents, etc.

It can be seen that Polypropylene hollow construction plastic formwork made of polypropylene (PP) as raw material is superior to traditional bamboo (wood plywood) in all aspects. As a recyclable and environmentally friendly material, it is not only convenient to use, but also saves a lot of costs for the company.

BZ hollow construction plastic formwork factory looking forward to your inquiry!

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