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The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Amorphous and Semi-Crystalline Engineering Thermoplastics Materials,

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Presentation on theme: "The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Amorphous and Semi-Crystalline Engineering Thermoplastics Materials,"— Presentation transcript:

1 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Amorphous and Semi-Crystalline Engineering Thermoplastics Materials, properties and applications. Prepared by the IAPD Education Committee (Module 4) Presented courtesy of Modern Plastics Inc.

2 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4

3 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Amorphous Engineering Thermoplastics Key Characteristics Moderate cost, strength and temperature resistance Good impact resistance Translucency Good dimensional stability Excellent optical qualities

4 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Amorphous Engineering Thermoplastics Materials Polycarbonate (PC) Polyphenylene Oxide (PPO) Polyphenelyne Ether (PPE) Thermoplastic Urethane (TPU)

5 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Polycarbonate (PC) Strengths Excellent clarity Excellent toughness Good heat resistance Excellent electrical properties Intrinsic flame-retardancy Excellent strength

6 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Polycarbonate (PC) Limitations Continual exposure to hot water causes gradual embitterment Most aromatic solvents, esters and ketones can cause crazing and cracking

7 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Polycarbonate (PC) Applications Vandal resistant windows Machine guards Outdoor signs Sky lights Backboards Bike, roller blading protective wear

8 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Modified Polyphenylene Oxide (Mod PPO) Modified Polyphenylene Ether (Mod PPE) Key Characteristics High dielectric strength Available in FDA compliant grades Less expensive than polycarbonate (PC) Good chemical resistance to strong acids, bases and water Wide range of processing Good creep resistance

9 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Modified Polyphenylene Oxide (Mod PPO) Modified Polyphenylene Ether (Mod PPE) Applications Electrical housings in appliance, computers, business equipment, etc. Water purification equipment parts Insulators Gears

10 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Thermoplastic Polyurethane (TPU) Key Characteristics Wide range of service temperatures Wide range of harness options Excellent tear resistance Excellent compression strength Excellent resistance to non polar solvents Excellent electrical properties Excellent abrasion resistance High tensile strength

11 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Thermoplastic Polyurethane (TPU) Applications Impact resistant housings Valves Water filter caps Geophysical cable spacer

12 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Semi-Crystalline Engineering Thermoplastics Key Characteristics Moderate cost, strength Moderate temperature resistance Good chemical resistance Good bearing and wear properties Low COF Difficult to bond

13 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Semi-Crystalline Engineering Thermoplastics Materials Polyamide (PA) — Nylon Polyoxymethylene (POM) — Acetal Polyethylene terephthalate (PET) Polybutylene terephthalate (PBT) Ultra high molecular weight polyethylene (UHMW-PE)

14 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Nylon (PA) Strengths Good strength Good toughness Fair heat resistance Good chemical resistance Low COF

15 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Nylon (PA) Limitations Strong acidic environments Areas where moisture absorption is of concern Areas experiencing high operating temperatures

16 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Nylon (PA) Applications Film Automotive Electrical/electronics Consumer goods

17 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Cast PA vs. Extruded PA Extruded nylon can be produced in almost any grade Cast nylon grades are limited to Type 6, Type 6 1/2 and some Type 12 Generally Nylon 6/6 and Nylon 6 (cast or extruded) are interchangeable in most applications (physical property differences are minor) Nylon 6/6 is stronger and stiffer than Nylon 6, and has more resistance to compression Nylon 6 has better elongation values than Nylon 6/6, providing better ductility Cast Nylon can be produced in large profiles and custom shapes, and is generally less expensive than extruded grades

18 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Acetal (POM) Strengths Good dimensional stability Good wear resistance Excellent strength Excellent stiffness Good rigidity Low moisture absorption Low COF

19 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Acetal (POM) Limitations Centerline porosity in copolymers Using copolymer in hot water environments (boiling/steam) Strong acidic environments Strong alkali environments Areas experiencing high operating temperatures

20 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Acetal (POM) Applications Bearings Bushings Valve seats Washers Nozzles Spools Cams

21 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Thermoplastic Polyesters Key Characteristics Good range of mechanical properties Good dimensional stability Superior chemical resistance Good electrical properties

22 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Thermoplastic Polyesters Materials Polyethylene terephthalate (PET) Polybutylene terephthalate (PBT)

23 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Polyethylene Terephthalate (PET) Polybutylene Terephthalate (PBT) Key Characteristics High dimensional stability under heat High stiffness and hardness Good bearing strength Good electrical properties Good resistance to chemicals Good stress-cracking resistance Excellent flow characteristics

24 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Thermoplastic Polyesters Applications Pump components Automotive components Food packaging components Insulators

25 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Thermoplastic Polyesters Caution! Watch high temperature environments! Use caution when recommending thermoplastic polyesters in applications requiring high temperature resistance, above o C/ o F.

26 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Ultra High Molecular Weight PE (UHMW-PE) Strengths Highest abrasion resistance and impact strength of any plastic Very low COF Excellent cryogenic (low temperature) material Self-lubricating FDA/USDA compliant

27 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Ultra High Molecular Weight PE (UHMW-PE) Limitations Only good until 82 o C/180 o F Not a self-supporting material High cost for tooling for custom extrusion and custom parts

28 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4 Ultra High Molecular Weight PE (UHMW-PE) Applications Guides Wear strips Liners

29 The International Association of Plastics Distributors The IAPD Plastics Primer, Module 4


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