INTRODUCTION OF PLASTIC MATERIAL PROPERTIES & SELECTION PROCESS-PUBLIC USE:

Plastic parts range from simple devices to complicated test equipment and implants. Plastics in engineering are used more and more for weight, cost, and performance purposes. This workshop will discuss plastics used in the injection molding process for medical, automotive and audio industries. The first section will review the general composition of plastic materials which will include the materials added to the basic polymers. The second section will discuss many factors that contribute to the plastic selection. The final section will review the chemistry and the application of most common plastic materials.

COURSE OBJECTIVES:

• Polymer properties
• Polymer additives & modifiers
• Material selection process
• Common polymers & their physical, thermal & chemical properties
• Plastic injection molding do’s & dont’s
• Common polymer issues faced at your workplace and a systematic way to resolve them

INTENDED AUDIENCE:

Specifically designed for participants who want to improve their knowledge in polymer technology.   A variety of people will benefit from this course include:

• Product designers
• Mould designers
• Quality engineers
• SQE engineers
• Moulding engineers
• Process engineers
• Project engineers
• Manufacturing engineers
• Purchasers
• Material planners
• Any personnel who wants to know more about plastic materials

PREREQUISITE :

• None.

METHODOLOGY:

• This course is conducted in a seminar room
• Interactive and action based with personal examples.
• Combination of short lectures, visual presentations, workshops, demonstrations, simulations and games. More emphasis is placed on workshops to allow the participants to learn the material presented in a fun and easy manner.
• Participants are expected to bring along their real life issues for discussion

DURATION:

• 2 days

OUTLINE OF WORKSHOP:

Introduction to polymers (thermoplastic and thermosets) 

• Linear, Branched, Cross-linked Polymers
• Isomers
• Molecular Weight

Additives

• Fillers
• Impact Modifiers and Tougheners
• Radiation Stabilizers
• Pigments, Extenders, Dyes, Mica
• Thermal Stabilizers & Antistats
• BaSo4

Material selection process

• Physical and Mechanical Properties
  • Fatigue
  • Wear resistance
  • COF (Coefficient of friction)
  • Shrinkage
  • Moisture absorption
  • Strength
  • UV resistance

• Flammability
• Thermal Properties
  • CUT temperature
  • ARO temperature
• Electrical Properties
• Chemical Resistance
• Sterilization Capability
• Long-Term Durability
• Leachables and Extractables
• Shelf Life and Aging
• Joining and Welding
• Medical Grade Plastics
• Food grade Plastics

Common polymers & their physical, thermal & chemical properties

• The 4 documents that we must have from every polymer raw material supplier
  • Material properties data sheet
  • Material processing data sheet
  • Material design guidelines
  • MSDS
• Semi-crystalline resin
  • PP
  • PE
  • POM
  • PBT
  • PPS
  • PEEK
  • PFA, PVDF
  • PA
• Amorphous resin
  • PS
  • PMMA
  • PC
  • PVC
  • ABS
  • PPE
  • PSU, PES
• Polyurethane (PUR)
• Fluorinated Ethylene-Propylene (FEP).
• Methacrylate Acrylonitrile Butadiene Styrene (MABS)
• Measurements of the resin
  • melt flow index
  • density
  • molecular weight distribution
  • melting point, softening point
•  Measurements of the converted articles
  • dimensional stability
  • shrinkage
  • warpage
  • stressed-crack
  • surface tackiness
• How to measure and quantify shrinkage and warpage?
• Common injection molding problems and troubleshooting

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