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Packaging Final
IT class flashcards
| Question | Answer |
|---|---|
| Polyethylene (PE) | Properties: Very cheap, strong and easily molded Use: Carrier bags, molded for containers, buckets, pop bottles, etc. |
| Polypropylene | Properties: Form strong fibers and has high elasticity, flexible, light and can be dyed Use: Car parts such as bumpers, battery cases, plastic chairs, ropes, fishing nets and carpets |
| Polystyrene | Properties: Cheap, easily molded and can be expanded into foam Use: Plastic models, foam packaging, plastic cups, radio outer cases and when expanded, as insulation |
| Polyvinylchloride (PVC) | Properties: Cheap, strong, flexible yet strong, etc. Use: Pipes, gutters, window frames, electrical insulation of cables, floor tiles, rain coats, seat covers, records and wall paper |
| Extrusion | Useful to produce large items with minimum complication in design like pipe, film, rod, profile |
| Injection Molding | Widespread use in manufacturing small to large items with high quality and great accuracy |
| Blow Molding | Very useful process to produce small to large enclosed containers e.g. bottles, jerrycans, etc. |
| Rotational Molding | Occasionally used to manufacture very large parts like water tanks. |
| Thermoforming | This process is used to manufacture products from extruded sheet or film. |
| BM Sprue | BM main channel through which molten plastic enters the mold |
| BM Runners | BM channels that distribute molten plastic to various cavities in a multicavity mold |
| BM Gate | BM small openings through which the molten plastic enters the mold cavity |
| Parison | Hollow injection molded tube where the "finish" is usually accomplished |
| Annual damage to consumer products | $10 billion due to transportation and handling |
| Shock | resulting from drops/impacts ‐ Need cushioning for protection (foams, corrugated, loose fill) |
| Vibration | continuous – during shipping ‐ Can cause – loosening of components, load shifting in trailer, abrasion/scuffing, settling |
| Altitude | Drop in temperature and pressure “Lapse rate” → Every 1000 feet ↓ T → 3.5 °F ↓ P → 0.5 psi Can cause pouches to burst during climb |
| Static Electricity | caused due to rubbing of two materials ‐ leads to charge build up ‐ discharge through a small component can destroy it ‐ decrease in RH increases ESD problems |
| Heat | increases microbial growth |
| Cold | causes loss in texture in foods and makes plastics brittle |
| Humidity | Absorption by dry foods leads to microbial clumping ‐ Use “DESSICANTS” ‐ Absorption by paper: loss of strength ‐ “CYCLIC HUMIDITY”: ↑ problems ‐ Use of “Green” pallets can keep lot of moisture |
| Top pallet size | 48 x 40 in for groceries |
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