Our products are manufactured from various plastics with different properties. A description of their general, mechanical and chemical properties, use cases and their comparison you can find bellow.
- Briefly about resins
PET – polyethylene terephthalate is a clear, high gloss surface, solid, rigid, tough, physiologically and heat-resistant material. It is suitable for wide application: dishes for microwave ovens, automotive lighting housings, bottles, foil for baking, switches, watch cases, etc.
PE – polyethylene is according to the chemical structure the simplest and most commonly used plastic material. It is produced by the polymerization of ethylene by various methods which give polyethylene with different characteristics. The most common types are:
LDPE – low density polyethylene and HDPE – high density polyethylene.
With increasing density, increasing tensile and flexural strength, stiffness, hardness, heat resistance and resistance to chemicals and solvent. However the transparency and flexibility of the product decrease. Polyethylene is an odorless, tasteless, and physiologically safe. Applications for contact with food are therefore safe. Examples: household containers, bottles, toys, various bags, shrink foil, corks, packaging for food, chemicals, pharmaceuticals, various pipes, appliance housings, etc.
PVC – polyvinyl chloride obtained by polymerization of vinyl chloride. The volume of its production immediately follows the PE and PP. PVC is widely used in construction because it is inexpensive, durable and easy to assemble. In the market appears as the hard and soft PVC. The last one contains up to 50% plasticizers, and is in such form used for clothing, upholstery, flexible pipes, flooring, swimming pools, interior coating of tanks, inflatable products etc. Hard PVC is used in drainage manufacturing, drainage and sewer pipes, roof drainage, window blinds and profiles, gaskets, electro technical insulation material etc.
PP – polypropylene is obtained by polymerization of propylene. It is one of the lightest plastics in the market. It is simple to process, have low density and is therefore lightweight. It is also hard, tough, resistant to most chemicals and retains its shape even at 100°C. Polypropylene is odorless and tasteless, physiologically appropriate, without harming the skin and therefore often used for products in the food and pharmaceutical industries. Examples: food packaging, medical devices, boxes, water pipes, automotive parts, electrical appliances etc.
PS – polystyrene is obtained by polymerization of styrene. The material has a high gloss surface, is hard, rigid, fragile and sensitive to impact. There are several types of styrene, namely: standard polystyrene used for disposable packaging, tableware and cutlery, beauty products, parts of the lights, boxes for medicines, etc.; shock resistant polystyrene, which is used for housing of various appliances, coolers parts, etc.; foamed or expanded polystyrene, used in construction, packaging, etc.
- General properties of resins
PET HDPE PVC LDPE PP PS Visual appearance clear translucent clear to translucent translucent translucent clear Short term applicable temp. +170°C +110°C +75°C +90°C +140°C +90°C Long term applicable temp. -90°C to +60°C -100°C to +90°C -10°C to +65°C -50°C to +80°C -10°C to +120°C -10°C to +70°C Microwave safe √ √ × √ √ × Recycling √ √ √ √ √ √
- The mechanical properties of resins
PET HDPE PVC LDPE PP PS Moisture barrier XXx XXXx XX XXX XXXx Xx Oxygen barrier XXX X XXX X X XX Rigidity ↑ → ↑ ↓ → ↑ Resistance to impact XXXX XXXX XXX XXXX XX X Resistance to cold XXX XXXX XX XXXX Xx X Resistance to sunlight XXX XX XXx XX XX Xx
XXXX – Excellent
XXX – Good
XX – Fair
X – Poor
↑ – High
→ – Moderate
↓ – Low
- The chemical resistance of resins
[at 23°C] PET HDPE PVCsoft/hard LDPE PP PS Acetone √ ? × / × ? √ × Alcohol √ √ √ / √ √ √ √ Ammonia √ √ √ / √ √ √ √ Gasoline √ ? √ / × ? ? × Detergents √ √ √ / ? √ √ √ Edible oil √ √ √ / × √ √ √ Heating oil √ √ √ / ? √ √ ? Mineral oil √ √ √ / ? √ √ ? Milk √ √ √ / × √ √ √ Acetic acid 10% √ √ √ / √ √ √ √ Washing alkalis √ √ √ / ? √ √ √ Fruit juices √ √ √ / ? √ √ √ Water √ √ √ / √ √ √ √
√ – Resistant
? – Conditionally resistant
× – Non resistant