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Types of Plastic Resins & Quality Facts


PET - Polyethylene Terephthalate

  • Glass like clarity
  • Durable
  • Rigid
  • Impact resistant
  • Exceptional gas and moisture barrier properties
  • Good alcohol & solvent barrier
  • Not suitable generally for hot fill applications

HDPE - High Density Polyethylene

  • Excellent moisture barrier
  • Impact resistant
  • Translucent
  • Ideal for high-speed filling
  • Well suited for demanding pharmaceutical specifications, water-based chemicals, toiletries & cosmetics, and certain food products
  • Inadequate for products sensitive to oxidation or those products which contain solvents

PVC - Vinyl/Polyvinyl Chloride

  • Transparent
  • Rigid
  • Excellent resistance to oxygen permeation and oils
  • Good water barrier characteristics
  • Commonly used in the toiletry and cosmetic market

LDPE - Low Density Polyethylene

  • Squeezable and soft particularly suited for squeeze spray or dropper applications
  • Virtually unbreakable and more resistant to stress cracking than HDPE
  • Retains impact strength at very low temperatures
  • Does not withstand product fill temperatures of more than 100ºF
  • Poor barrier to gases or solvents

PP - Polypropylene

  • Autoclavable
  • Excellent contact clarity
  • Can be used for hot fill opportunities beyond the limits of HDPE
  • Excellent impact strength, stress crack resistance, and barrier characteristic
  • Lightweight and strong
  • Tends to become brittle at lower temperature ranges

PS - Polystyrene

  • Rigid, glass like clarity
  • Lightweight
  • Able to withstand high fill temperatures up to 180° F
  • Generally used for dry products, which are not extremely hygroscopic in nature

Other

Packages made with a resin other than the six listed above, or is made of more than one resin and used in a multilayer combination

Polycarbonate

  • Transparent
  • Impact resistant
  • Rigid
  • Outstanding dimensional stability
  • Resistant to ultraviolet light
  • High heat resistance