Raw Material
Raw Materials / Properties of Plastics

TPP processes only the highest grades of raw materials.No stripping agents, biocides, plasticizers or other chemical additives are incorporated.

TPP products are free of substances from animal origin.

Heat resistance
Polyethylene Permanent loading: 70 – 80 °C / 158 – 176 °F (short term max 100 °C / 212 °F), cannot be autoclaved
Polypropylene Permanent loading: 100 – 110 °C / 212 – 230 °F, (short term max 140 °C / 284 °F), can be autoclaved
Polystyrene Permanent loading: 60 – 70 °C / 140 – 158 °F, (short term max 80 °C / 176 °F), cannot be autoclaved
Low temperature resistance
Polyethylene -40 °C / -104 °F
Polypropylene -190 °C / -374 °F
Polystyrene -40°C / -104 °F
Optical Properties
Polyethylene translucent to opaque
Polypropylene translucent, shiny surface
Polystyrene transparent, shiny surface with 90 % transparency index at 400 – 800 nm
Mechanical Properties
Polyethylene low tensile strength and surface hardness; high ductility at soft and harder levels; low resistance to stress cracking; water repellent; susceptible to electrostatic charging
Polypropylene high fracture strength; dimensionally stable; high stiffness, strong and hard
Polystyrene low fracture ductility; low warm strength; excellent electrical insulation properties; not suitable for use at high centrifugal loads
Chemical Resistance
Polyethylene exhibits high resistance; dilute acids, alkalis, alcohol; oil and salt solutions do not attack, concentrated and oxidising acids such as nitric acid and the halogens, lead to disintegration
Polypropylene high resistance to aqueous solutions of organic salts, acids and alkalis, as well as to organic solvents up to 60 °C; stable in alcohols, esters and ketones; aromatic and halogenated hydrocarbons, oxidising substances such as concentrated nitric acid and at higher temperatures, fats, oils and waxes all lead to swelling
Polystyrene high resistance to salt and caustic solutions, non-oxidising acids, alkalis and alcohols. Petroleum spirit, ethereal oils, strongly oxidising agents and aromatic attack and give rise to stress cracking
PE / PP / PS all raw materials are pure hydrocarbon compounds and therefore neutral to the environment. No harmful substances are generated during controlled burning.