the international association of plastics distributors the iapd plastics primer, module 6...
Post on 29-Mar-2015
276 Views
Preview:
TRANSCRIPT
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Understanding Thermoset
Plastic Materials
Prepared by the IAPD Education Committee (Module 6)
Presented courtesy of Modern Plastics Inc.
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Thermosets
• Resin
• Thermoset vs. thermoplastic
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
ThermosetsTypes
• Laminates• Composites• Polyurethanes
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Thermoset Laminates
• Phenolics• Epoxies• Melamines• Silicones• Polyesters• Composites
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Laminates Key Characteristics
• Corrosion resistant
• Good insulating characteristics at low temperatures
• Good machinability
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
LaminatesProcess
Heat and pressure applied to the top and bottom of the material.
Resin Binder
Reinforcing Substrate
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Laminates Types
• Paper based• Cotton based• Glass based• Synthetic fabric based
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Phenolic Laminates Strengths
• High degree of resistance to deforming under load
• Can withstand 149°C/300°F continuously• One of the hardest plastics available • Cross-linked phenolics are very resistant to
compressive loads
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Phenolic Laminates Limitations
• Brittleness
• Impact resistance
• Moisture resistance is limited
• Resins darken when exposed to heat and ultra
violet light
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Phenolic Laminates Types
• Paper based
– Grades X, XX, XXX, XP,
XXP, XXXP, XPC, XXPC
and XXXPC
• Cotton based– Grades C, CE, CYB, L, LE,
LYB, LM
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Phenolic Laminates Applications
• Wiring devices• Switch gear• Circuit breakers• Insulators• Gears• Wear guides• Pulleys• Rollers
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Epoxy Laminates Strengths
• Offer virtually no water absorption
• Good insulating and electrical properties
• Excellent dimensional stability
• Good temperature and chemical resistance
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Epoxy Laminates Limitations
• Brittle
• Poor UV resistance
• Poor weathering resistance
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Epoxy Laminates Types
• G-10• FR-4• G-11• FR-5
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Epoxy Laminates Applications
• Electrical insulators
• Circuit board backing
• Construction
• Aviation/aerospace
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Melamine LaminatesStrengths
• Made from melamine and formaldehyde resins• Usually used as a laminate with cloth• Easily produced in an unlimited range of colors• Good electrical properties under humid conditions• Excellent arc-tracking resistance• Excellent compressive strength• Good physical properties• Very good solvent resistance• Can withstand temperatures of 204°C/400°F • Good chemical and weather resistance• Strong mechanical properties
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Melamine LaminatesLimitations
• Can be attacked by strong acids• Brittleness• Poor resistance to organic solvents• Difficult to bond• High cost
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Melamine LaminatesTypes
• G-5• G-9
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Melamine LaminatesApplications
• Welding rod holders
• Heavy duty switch gears
• High temperature switches
• Electrical insulators
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Silicone LaminatesStrengths
• Retain properties over a wide temperature range
• Remain flexible down to negative 16ºC/60ºF• High degree of biocompatibility
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Silicone LaminatesLimitations
• Tensile strength low• Abrasion resistance low• Swell in oils, fuels and other solvents
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Silicone LaminatesType
• G-7 (glass cloth reinforced silicone)
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Silicone LaminatesApplications
• Sealants• Gaskets• Medical
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Polyester LaminatesStrengths
• Low cost• Good arc and track resistance
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Polyester LaminatesLimitations
• Lower abrasion resistance • Brittle• Great change to electrical properties in humid
environments
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Polyester LaminatesTypes
• GPO-1• GPO-2• GPO-3
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Polyester LaminatesApplications
• Structural profiles• Sodering pallets
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Composites - Thermosetting Matrix
• History• Definition
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
CompositesMaterials
• Polyester and vinyl esters• Epoxy• Bismaleimides (BMI)• Polyimides• Polyureas
– Cyanate ester and phenolic triazine (PT)
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Polyurethane (PUR)Strengths
• Good abrasion resistance
• Good toughness
• Very high tear resistance
• High load bearing ability
• High impact resistance
• Good elastomeric memory
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
PolyurethaneLimitations
• Hot water limitation 82°C/180°F
• Poor chemical resistance to strong acids,
bases and certain solvents
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Polyurethane and the Environment
• TDI
• MDI
• Processes
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
PolyurethaneHardness Chart
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
PolyurethaneApplications
• Automotive• Building and construction• Furniture and mattresses• Insulation for refrigerators, shipping
containers, tanks, pipes
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Polyurethane Urethane Types
• Polyether
• Polyester
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Polyether Urethane Strengths
• Better water resistance
• Better dynamic properties
• Better low temperature properties
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Polyether Urethane Limitations
• Lower abrasion resistance than polyesters• Stiffer material than polyesters• More likely to tear
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Polyether Urethane Applications
• Bushings• Idler rollers• Printing machine rolls• Hydraulic seals• Elevator wheels• Paper mill rolls
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Polyester UrethaneStrengths
• Higher physical properties• Generally softer than polyether • Stronger cut and tear resistance• Better oil and heat aging resistance• Meets FDA requirements for wet food
applications
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Polyester Urethane Limitations
• Poor resistance to hydrolysis (moisture absorption)
• Less resilient than polyethers • Poor low temperature performance
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Polyester Urethane Applications
• Cutter bars on printing machines• Wear pads • Tumbler liners• Squeegees• Office equipment rollers
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
Polyurethane's Product Range Comparisons to Other Materials
The IAPD Plastics Primer, Module 6The IAPD Plastics Primer, Module 6
The International Association of Plastics DistributorsThe International Association of Plastics Distributors
The End
top related