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Polypropylene (PP)

Polypropylene is a semi crystalline thermoplastic with high rigidity and good chemical resistance. A distinction is made between homopolymers (PP-H) and copolymer (PP-C), copolymers are tough but have less mechanical and chemical stability.

PP-H is subject to strong sliding abrasion and is thus not suitable for use in sliding applications. 

It is resistant to acids, alkaline solutions, salts and salt solutions, alcohol, oils, fats, waxes and many solvents.

Aromatic and halogenated hydrocarbons cause swelling.

It is not resistant to strong oxidising materials (e.g., nitric acid, chromic acid or halogens), and there is a danger of stress corrosion cracking.

PP-C has high impact strength, it’s superior strength makes it lower susceptible to tension cracks.It is widely used for chemical, mechanical and electronic industry, (e.g.,Tanks, Lab equipment, Etching equipment), and so on. 

PP-GF is reinforced with glass fiber and has higher strength than common PP sheets.

It is ideally used for structural tanks and lining, ducts and fume hoods, plating barrels and so on. 

Applications – Pump parts, pipes, fittings, valve bodies, acid and alkali resistant containers, chemical storage tank and processing equipment, clicking boards in shoe industries and carry bag industries, etc.   

The main properties of PP are

  1. Low density compared to other materials
  2. Minimum water absorption
  3. Excellent chemical resistance
  4. High corrosion resistance
  5. Exemplary bending and fatigue property  
  6. Non-toxic 
  7. Physiologically safe 
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