Plastics - thermoforming Flashcards
What are the advantages of HDPE (high density polyethylene)?
- Affordable
- Can withstand temperatures from -148 to 176 degrees Fahrenheit
- Non-leaching
- UV-resistant
- Dishwasher safe
- Resistant to most chemical solvents
- Stiff material
- 100% recyclable
- Durable
What are the disadvantages of HDPE (high density polyethylene)?
- Poor weathering resistance
- Flammable
- Brittle - sensitive to stress cracking
- Difficult to bond
What are the disadvantages of Acrylic?
Not as hard as glass
What are the advantages of Acrylic?
- Stronger than glass
- More durable than glass
- Weighs 50% less than glass
- 10 times more impact resistant than glass
- Weather resistance
- Easy to clean
- Easy to fabricate
- Transparent
- Coloured and frosted finishes available
- Non-toxic in final product
- Retains colour over time
- 100 % Customisable for shape and form (holds shape as it cools)
What are the advantages of PET (Polyethylene terephthalate)?
- Shatterproof - tough
- Inert - doesn’t react with fizzy drinks
- High strength to weight ratio
- Recyclable
- Relatively high melting point
What are the disadvantages of PET (Polyethylene terephthalate)?
- Resin PET can oxide so isn’t suitable for long shelf life packaging
- PET is not biodegradable
- Low heat resistance
What are the advantages of PP (Polypropylene)?
- Tough
- Good heat resistance
- Translucent
- Good chemical resistant
- Semi-rigid
- Suitable for corrosion resistant structures
- Food contact suitable
- Lightweight
- Relatively inexpensive
- Recyclable
- Resistant to corrosion
- High tensile strength
What are the disadvantages of PP (polypropylene)?
- Not biodegradable
- Highly flammable
What are the disadvantages of PVC (polyvinyl chloride)?
- Not eco friendly
- Can crack when in pipe form
What are the advantages of PVC (polyvinyl chloride)?
- Durable
- Tough
- Lightweight
- Inexpensive
- Good tensile strength and impact resistance
- Fire Resistant
- Chemically resistant
What are the advantages of ABS (Acrylonitrile Butadiene Styrene)?
- Chemically resistant
- Low melting point
- High Tensile Strength
- Good impact strength
What are the disadvantages of ABS (Acrylonitrile Butadiene Styrene)?
- Can degraded by intense UV light
- Low melting point
What are the advantages of cellophane?
Biodegrades in landfill.
Can be waterproof and breathable at the same time
What are the disadvantages of cellophane?
Poor performance at low temperatures.
Cost
What are the advantages of Nylon (polyamide)?
As clothing
* Lightweight
* Exceptional strength
* Abrasion resistant
* Easy to wash
* Resists shrinkage and wrinkles
Resilient, pleat retentive
* Fast drying, low moisture absorbency
* Can be pre-coloured or dyed in a wide range of colours
* Resists damage from oil and many chemicals
* Insulating properties
* High elasticity
