Manufactures Cusell, S.L.

Materials

Plastics

ABS

• Good impact resistance, even at low temperatures • Easily processed (may be electroplated) • Good insulating properties • Good weldability • Good abrasion and stain resistance • High dimensional stability (low water absorption) • Good paintability and platability • Poor weathering resistance • Ordinary grades burn easily and continue to burn once the flame is removed • Scratches easily • Poor solvent resistance, particularly aromatic, ketones and esters • Can suffer from stress cracking in the presence of some greases.

EVA

Highly flexible, even at low temperatures (-25°C) • Highly compatible with a lot of elastomers, TP and other materials (SBR, EPDM, TPE, PE, PVC,...) • Excellent resistance to environmental stress cracking • Better tear resistance than LDPE • FDA compliant • Good UV and ozone resistance • Poor heat resistance • Attacked by polar solvents, hydrocarbons, oxidants and strong acids • Reduced barrier properties compared to LDPE • Reduced creep resistance, compared to LDPE.

PA6/PA6.6 (POLIAMIDE6/6.6 - NYLON6/6.6)

• High strength and stiffness at high temperature • Good impact strength, even at low temperature • Very good flow for easy processing • Good abrasion and wear resistance • Excellent fuel and oil resistance • High water absorption and water equilibrium content • Low dimensional stability • Attacked by strong mineral acids and absorbs polar solvents • Proper drying before processing is needed.

POM (ACETAL/DELRIN®)

• High mechanical properties (stiffness, hardness and toughness) • Broad range of use temperature (from -40 to 130 °C) • High resistance to creep and fatigue • Low coefficient of friction • High wear resistance • Good insulating properties • Low water absorption • Good chemical resistance, particularly with oils and lubricants • High shrinkage (~2%), due to its high cristallinity • Attacked by oxidizing or strong acids and strong bases • Low resistance to UV and gamma radiation • Flammable, releases some formaldehyde (highly odorous) • Opaque.

LDPE  AND HDPE (LOW AND HIGH DENSITY POLYETHYLENE)

· Very low cost · Excellent chemical resistance · Very good processablity · High impact strength at low temperature · Excellent electrical insulating properties · Very low water absorption · FDA compliant · Can be transparent in thin film form · Susceptible to environmental stress cracking · Low strength, stiffness and maximum service temperature · High gas permeability, particularly carbon dioxide · Poor UV resistance · Highly flammable · High-frequency welding and joining impossible.

PET

• Excellent electrical properties • Broad range of use temperature, from -60 to 130°C • Low gas permeability, in particularly with carbon dioxide • Suitable for transparent applications, when quenching during processing • Good chemical resistance at room temperature • FDA compliant • Transparent to microwave radiation • Recyclable • Affected by boiling water • Attacked by alkalis and strong bases • Attacked at high temperatures (>60°C) by ketones, aromatic and chlorinated hydrocarbons and diluted acids and bases

PC – POLYCARBONATE

Appearance • Optical clarity • Impact strength • Thermal resistance • Food contact • Flame retardancy • Wheatherability • Biocompatibility • Good electrical properties • Subject to stress cracking • Fairly high processing temperatures required • Degrades upon extended residence time in processing equipment • Chemical resistance is only fair  •  Aromatic sensitivity.

PMMA (ACRYLIC)

• Outstanding transparency • Excellent UV resistance • Surface hardness • Half the weight of glass • Good dimensional stability • High color brightness and stability • Poor impact resistance • Limited heat resistance (80°C) • Limited chemical resistance, attacked by organic solvents • Poor wear and abrasion resistance • Cracking under load possible.

PVC

• Excellent balance Stiffness/impact/flow resistance • Outstanding outdoor weatherability • Good heat resistance, up to 100°C • High gloss • Good colorability • Good chemical resistance • Sensitive to UV and  oxidative degradation • Thermal decomposition evolves HCI • Higher density than many plastics • Attacked by concentrated acids, aromatic and chlorinated hydrocarbons, esters, ethers and ketones.

PTFE (TEFLON®)

• Excellent resistance to extreme temperatures (from -180 to 260°C) • Very low friction coefficient (0.11) • Outstanding chemical resistance • Excellent electrical properties, even at high temperature and in a damp atmosphere • Outstanding non-stick properties • Excellent UV and weathering resistance • Excellent UV and weathering resistance • FDA compliant • Non flammable • High economic cost • Processing with usual thermoplastic techniques impossible • High creep rate • Poor wear resistance • High density • Sticking almost impossible • Toxic smoke emission.

PP – POLYPROPYLENE

• Low economical cost • Good chemical resistance against most inorganic acids, alkalis, and salts • Good resistance to environmental stress cracking when in contact with alcohols, esters, detergents or polar hydrocarbons • Very good fatigue resistance • Very low density • Excellent dielectric properties • More rigid than PE and retains mechanical properties at elevated temperatures • Mechanical and electrical properties unaffected by submersion in water • Good resistance to steam sterilization • Excellent processing characteristics • Can be joined by hot-gas, hot-tool, induction, or friction welding • Poor resistance to UV, need to be stabilized • Embrittles below -20°C • Low upper service temperature, 90-120Cº • Heat-ageing stability is adversely affected by contact with metals • Limited impact resistance • Low scratch resistance • Poor paint adhesion • Attacked by highly oxidizing acids, swell rapidly in chlorinated solvents and aromatics.





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