Mellanrum
Plastics we process
Plastic is a versatile, flexible material that is suitable for a wide variety of different uses in areas ranging from the automotive industry to healthcare, household products and construction components.
All plastics consist of special molecules called polymers. Polymers are made of small molecules called monomers. The most common monomers include ethylene and propylene, which traditionally come from fossil sources. Plastic can also be made from bio-based raw materials such as corn, sugar cane and cellulose.
At Mälarplast we are happy to work with regenerated (recycled) and bio-based plastics. We are also experienced in processing plastics designed to come into contact with food.
You can read more about the various plastics we process in the table below.
PS (Polystyren)
Good qualities:
Hard and rigid, easy to color, transparent, available in varying qualities
Limitations:
Brittle, low softening temperature, low UV and chemical resistance
Areas of use:
Packaging, disposable items, household items, cellular plastic
ABS (Akrylnitril-butadien-styren)
Good qualities:
High impact strength, surface hardness and surface finish, chrome and plating available
Limitations:
Low chemical resistance to solvents, limited weather resistance
Areas of use:
Kitchen appliances, dashboards, toys, furniture, office machines, industrial parts
SAN (Copolymer of acrylonitrile and styrene)
Good qualities:
Hard and rigid, transparent, better thermal, chemical and outdoor resistance than PS
Limitations:
Yellows in heat and UV, low resistance to some solvents
Areas of use:
Household items, refrigerator parts, toothbrush handles, cups, trays
ASA (Copolymer of acrylonitrile-styrene-acrylic ester elastomer)
Good qualities:
High impact strength, surface hardness and surface finish, good color and outdoor resistance
Limitations:
Low chemical resistance to solvents, lower impact strength in cold than ABS
Areas of use:
Tough outdoor details, furniture, covers
PMMA (Acrylic plastic)
Good qualities:
Transparent, high gloss and hardness, very good outdoor resistance
Limitations:
Attacked by strong acids, alcohols and hydrogen chloride
Areas of use:
Lantern glass and fixtures, protective glass and window glass, lenses, signs
PE (Ethylene Plastic)
Good qualities:
Very good impact strength over a wide temperature range, chemical resistance and good electrical properties
Limitations:
High shrinkage, scratch sensitive, fire sensitive, greasy surface that makes printing and gluing difficult
Areas of use:
Household items, toys, bottles and tubes, buckets, packaging (film and bags)
PP (propylene plastic)
Good qualities:
Low density, good chemical resistance and better properties at higher temperatures than PE
Limitations:
Becomes brittle below -20 C, poor UV resistance
Areas of use:
Bottles, containers, pipes, electrical insulation parts, dashboards, kitchenware, toys
POM (Acetal Plastic)
Good qualities:
Good friction and wear properties. Excellent combination of toughness, stiffness, fatigue strength and creep resistance (spring material)
Limitations:
Difficult to glue, sensitive to acids
Areas of use:
Snaps, impellers, gears, sliding bearings, handles, fine mechanical details
PA (Amide Plastic)
Good qualities:
Good combination of mechanical and chemical properties, good temperature resistance
Limitations:
High moisture absorption, sensitive to acids
Areas of use:
Gear, screw, covers, cable insulation, shaft
PET (Thermoplastic Polyester)
Good qualities:
High stiffness and hardness, high chemical and abrasion resistance, good transparency, temperature resistance (modified)
Limitations:
Electrostatic, susceptible to hydrolysis, prone to warping
Areas of use:
Covers, household products, bottles
PBT (Thermoplastic Polyester)
Good qualities:
High stiffness and hardness, high chemical and abrasion resistance, good transparency, temperature resistance (modified)
Limitations:
Electrostatic, susceptible to hydrolysis, prone to warping
Areas of use:
Covers, household products, bottles
PC (carbonate plastic)
Good qualities:
Extremely high impact strength, dimensionally stable, good outdoor resistance, transparency
Limitations:
Susceptible to fracture directions and microcracks, low acid resistance
Areas of use:
Safety helmets, lens, windshields, fixtures, lenses, covers
PSU (Sulfone Plastic)PSU (Sulfone Plastic)
Good qualities:
Temperature resistant, even at very low temperatures, radiation resistant and dimensionally stable
Limitations:
Stress cracking is caused by organic solvents
Areas of use:
Medical equipment, household goods for micro, engine room parts
Good qualities:
Temperature resistant, even at very low temperatures, radiation resistant and dimensionally stable
Limitations:
Stress cracking is caused by organic solvents
Areas of use:
Medical equipment, household goods for micro, engine room parts
PPS (Phenylene Sulfide Plastic)
Good qualities:
Stiff and hard, high temperature and chemical resistance, flame resistant with good fatigue strength
Limitations:
Low impact toughness, attacked by oxidizing acids
Areas of use:
Faucets, pipes, car accessories, electrical components
TPE (Thermoplastic elastomers)
Good qualities:
Can be adapted to different softnesses, replaces rubber material
Limitations:
Not as high temperature resistance as silicone
Areas of use:
Gaskets, rubber parts (replaces natural rubber), handle parts
PLA (Polylactide Plastic)
Good qualities:
Polymerization of biomaterials from, for example, corn starch or cane sugar
Limitations:
Brittle, low softening temperature, low UV and chemical resistance
Areas of use:
Kitchen products, mobile phone cases, packaging
PEEK (Ether ether ketone plastic)
Good qualities:
Very high temperature resistance, strength and stiffness, low flammability and excellent hydrolysis resistance
Limitations:
Demanding in processing, high form shrinkage
Areas of use:
Engine parts, electronic components
Mellanrum
The art of choosing the right material
Thanks to our competence in the field of environment and sustainability, we can help you with the right product, in the right material, which is not only greener but also safer and more durable.
Helping companies create products for a more sustainable world is what we do best.