General material information without obligation




 

Physical and Mechanical Properties


With 0,90-0,91 g/ccm PP is a very light material. PP has a good stress crack resistance, a good toughness and excellent permanent fatigue strength in suitable thin wall thicknesses. As opposed to homopolymeric  PP copolymeric PP displays a very good notched impact behaviour  and therefore it is suitable for some technical purposes. The service life decreases as temperature increases. PP is water repellent like the most polyolefin. As regards hardness and strength partly crystalline PP is at the upper limits of partly crystalline HD-PE and bridges the gap to partly crystalline PA 6. With novel catalysts properties will be reached covering the whole range of the harder thermoplastic polyolefin-based elastomers (TPO's), as far as long way into Nylon 6 range.

 

Optical and Chemical Properties


In its natural colour PP is transparent, but not glassy. As the wall thickness of parts reduces, PP moulded parts become increasingly transparent. Random-Copolymers are nearly glassy moulded in thin-walled parts. - PP moulded parts are non-polar and therefore can only be attacked by very few chemicals. It is resistant to water (repellent, too), salt solutions, acids and alkalis. It is resistant to alcohol solutions up to 60°C and to solutions of washing lye. It swells up when it is exposed to homogenized hydrocarbons and at increased temperatures by grease, oil and wax. Given suitable colouration on a polyurethane or acrylic base PP can be varnished.

 

Resistance to Weather and Ageing


 In the visible range PP is adequately resistant to radiation. UV rays produce oxidation of the PP parts surface and lead therefore to brittleness and eventually to disintegration. A suitable colouration, e.g. soot, acts as a stabilizer, but reduces the resistance to ageing through heat. Addition of suitable UV stabilizers (HALS) prolongates outdoor usage of PP moulded parts in any colours up to 10-20 years.
 

Special Uses - Product Ranges


Glass fibre and other fillers designed to strengthen the material, various stabilisers, and conductive materials for improving electrical conductivity, addition of PP-based thermoplastic elastomers (TPO's) for softer and toughening setting. - Storage and transport containers, covers, fan wheels, furniture fittings, housings for electrical appliances.

 

Thermic Properties

 
The temperature range for permanent use of mechanical unloaded and non-reinforced PP parts reaches from -40°C to 110°C. For a short time same PP parts can also withstand temperatures of about 140°C. It starts to burn with a very light smell of wax at about 330°C. It burns with a weak flame and produces burning drops.

 

Physiological Behaviour and Joint


PP tastes and smells neutral and can be exposed to the skin unless additives are used which are harmful to health. Some producers attest compatibility to foodstuff for their PP. Thanks to its good chemical consistency because of the non-polar parts surface only impact glues can be used. The surface of parts must be scuffed or based-coated first. Same effect has flaming and corona discharge. PP can be jointed via heat element, friction-, vibration- or hot gas welding.






Resistance of various plastics (without obligation)


 
Sign Meaning
++ resistant
+ conditionally resistant
= Non-resistant
 
 





 
Material Concentration Rubber Polyamide Polyurethane Polypropylene
Wastewater - - ++ + -
Acetaldehyde 40% + + = +
Acetone - ++ ++ = +
Acetylene - ++ ++ ++ -
Acrylic acid >30°C - - = = -
Ethanol amine - - - = -
Ether - - ++ ++ -
Ethyl acetate - + ++ = -
Ethyl alcohol - ++ + ++ ++
Ethylene - - - ++ -
Caustic potash - - - = -
Caustic soda - - - = -
Alkyl benzene - - ++ - -
Alkyl alcohol - ++ + = -
Aluminium acetate - - ++ - -
Formic acid 10% + = = ++ (max. 60°C)
Amine, aliphatic - - ++ - -
Amino acid mixtures - - ++ - -
Liquid ammonia 20% ++ ++ = ++
Ammonium salts - - ++ - ++
Ammonium bicarbonate - - ++ - -
Ammonium rhodanide - - ++ - -
Ammonium hydroxyde - - - = -
Ammonium carbonate - ++ - = -
Ammonium nitrate - + - ++ ++
Ammonium sulphate - + - ++ ++
Amylacetate - ++ ++ = ++
Amyl alcohol - ++ ++ + ++
Aniline - = + = ++
Antra quinone, 85 % C - - ++ - -
Malic acid - - ++ + ++ (max. 60°C)
Barium salts - ++ + ++ ++
Cotton seed oil - - - ++ -
Benzene, Petrol ether - = ++ ++ =
Beer - ++ ++ ++ -
Bitumen - = ++ ++ -
Lead acetate, aqueous 10% + ++ ++ =
Lead nitrate - ++ - ++ -
Borax - ++ - ++ -
Boric acid, aqueous 10% ++ + ++ +
Bromine - = = = =
Butter - = ++ ++ -
Butane - = ++ ++ -
Carbolineum - = ++ = -
Casein - - ++ - -
Chlorine, chlorine water - = = = =
Citric acid, aqueous 10% ++ ++ - -
Citrus oils - - ++ - -
Chromic acids, aqueous 10% = + + =
Cobalt acids, aqueous 20% - + - -
Cyclohexanol - + ++ + -
Diethyleneglycol - ++ ++ ++ -
Dichlorobenzol - = ++ = =
Dichlorobutylene - = - = -
Dimethylether - + ++ ++ ++
Dimethylaniline - - - = -
Dimethyl formic amide - + ++ = ++ (max. 20°C)
Inert gases - - ++ - -
Pure acetic acid - + - = ++
Iron chloride, acidic 10% + = + ++ (max. 20°C)
Iron sulphate - - - ++ -
Decalcifier, aqueous 10% - ++ - -
Crude oil - = ++ ++ -
Ethanoic acid 30% = ++ = ++
Fatty acids - - ++ ++ -
Fir leaf oil - = - ++ -
Fluorine - = = = =
Formaldehyde 30% ++ ++ + ++
Formic amide, pure - ++ ++ + -
Furfural - - ++ = -
Gelatine - - - ++ -
Glucose - ++ - ++ -
Glycerine - ++ ++ ++ ++
Glycol - ++ + + ++
Uric acid, aqueous 10% ++ ++ - -
Hexane - = ++ ++ -
Hydraulic liquids - = ++ = -
Isopropyl chloride - = - = -
Isoprophyl ether - ++ - ++ -
Tincture of iodine - ++ = = ++
Potassium chloride 10% + ++ ++ ++ (max. 20°C)
Potassium cyanide - - - + -
Potassium hydroxide - - ++ = ++
Potassium sulphate - ++ - ++ ++
Potassium salts - - - + ++
Nirohydrochloric acid - = = = =
Carbon monoxide, hot - - ++ = -
Carbonic acid - - - ++ -
Coconut oil - = ++ ++ -
Cresols - - = ++ -
Copper chloride - ++ - ++ -
Copper salts, aqueous 10% - = ++ -
Copper sulphate - + + ++ ++
Adhesive - - - ++ -
Manganese salts 10% - + - -
Magnesium salts, aqueous 10% - ++ ++ ++
Methyl alcohol - + + ++ ++
Methylene chloride - = = = -
Methyl ethyl ketone - = ++ = ++
Methyl pyrolidone - - - = -
Milk - ++ ++ ++ -
Lactic acids - = = = ++
Mineral oils - = ++ ++ -
Mortars, cements, lime - ++ ++ - -
Mono bromo benzol - = - = -
Naphthalene - = ++ = ++ (Kristallin)
Sodium carbonat, aqueous 10% - ++ = ++
Sodium chloride, aqueous 10% + = ++ ++ (max. 20°C)
Sodium cyanide, aqueous 10% - ++ = -
Sodium hydroxyde, aqueous - - - = ++
Sodium nitrate, aqueous 10% ++ ++ ++ ++
Sodium phosphate, aqueous 10% ++ ++ ++ ++
Sodium silicate, aqueous 10% ++ ++ + -
Sodium sulphate, aqueous 10% ++ ++ ++ -
Sodium sulphide, aqueous 10% + ++ + -
Sodium thiosulfate 10% ++ ++ + -
Soda lye 50% ++ + = ++
Nickel chloride, aqueous 10% ++ + ++ -
Nickel salts, aqueous 10% - + ++ -
Nickel sulphate, aqueous 10% + + ++ -
Oleic acid - = ++ ++ -
Oxalic acids, aqueous 10% - + - ++
Ozone - = + ++ -
Palmitic acid - = ++ = -
Paraffin - = ++ ++ -
Vegetable oils - = ++ ++ -
Phenyl ethyl ether - = - ++ -
Phenyl benzol - = - = -
Phosphoric acid, aqueous 10% + = - ++
Propane - = ++ ++ -
Propyl alcohol - - - + -
Mercury - ++ ++ ++ ++
Mercury chloride - - = ++ ++
Flue gas - - - = -
Ricinol - - - ++ -
Hydrochloric acid, aqueous 30% + = = ++
Sulphuric acid - + + = ++
Mustard - - - ++ -
Silver nitrate - + - ++ ++
Soda solution, aqueous 10% ++ ++ - -
Stearic acid - = ++ = -
De-icing salts (solutions) - - ++ - -
Tannin acid 10% ++ - - -
Turpentine oil - = ++ + =
Tetrachloro carbons - = ++ = -
Ink - ++ ++ ++ -
Toluol - = ++ = =
Dichloroethylene - = + = =
Uranium fluoride - - = - -
Urine - ++ ++ - -
Vaseline - - ++ - ++ (max. 60°C)
Vinyl chloride, 80°C - - ++ - -
Wax, 80 °C - - ++ - -
Lees, 80°C - ++ ++ - -
Water, cold - ++ ++ ++ -
Water, up to 80°C - + ++ = -
Water (seawater) - ++ ++ + -
Tartaric acid, aqueous 10% ++ ++ + -
Xylol - = ++ = =
Zinc chloride, aqueous 10% ++ + = ++
Zinc rhodanide 30% - = - -