Term
| What is the symbol for HDPE and what is HDPE made from? |
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Definition
| Symbol number 2. It is made from petroleum |
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Term
| What does HDPE stand for? |
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Definition
| High density polyethylene |
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| HDPE is resistant to many different kinds of? |
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Definition
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Term
| What number is PET and what is it made of? |
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Definition
| number 1. it is made of polyethylene terephthalate |
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Term
| What is PET mostly used for? |
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Definition
| soft drinks and water bottles |
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Term
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Definition
| PVC is made of polyvinyl chloride |
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Term
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Definition
| -LDPE stands for low-density polyethylene. -it is made from petroleum. ldpe has a density range of .91 to .94 -it is tough and durable, but breakable -common in various containers, plastic bags, tubing, and parts that need to be soft and pliable. |
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Term
| tell me what you know of PP. |
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Definition
-PP stands for polypropylene
-used in packaging, automotive components, plastic parts, and reusable containers of various types
-can be made translucent when uncolored
-very high melting point (food containers made from it will not melt in the dishwasher)
-good against corrosion
-number 5 |
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Term
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Definition
- PS for short
- number 6
-it is solid at room temperature, but flows if heated above its glass transition temperature, and becomes solid again when cooled.
-can be transparent or made into various colors
-solid polystyrene is used in plastic models, CD and DVD cases, and smoke detector housings.
-Foamed polystyrene products are used in cases like packing materials, foam drink cups, inusulation, etc..
-commonly injection molded or extruded, while expanded polystyrene is molded or extruded in a different process.
-EPS stands for expanded polystyrene |
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Term
| Acrylonitrile butadiene styrene, what is it? |
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Definition
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Term
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Definition
shipping term. may stand for free on board or freight on board.
-The FOB term requires the seller to clear the goods for export. Buyer is responsible for all the costs incurred after the cargo has been LOADED on board. |
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Term
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Definition
-PLA is bio-degradable, there-fore from renewable resources such as corn starch...
-PLA has a density of 1.24
-Due to its relatively low glass transition temperature, it can not hold hot liquids
-Marked as number 7 |
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Term
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Definition
| Impact toughness and clear |
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Term
| Tell me questions you must ask suppliers. |
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Definition
1) what kind of materials...
-is it regrind? if so, what was the original product?
2) Can you fill a container?
-18 to 20 tons or 38,000 to 40,000 lbs
3)How often do you get these materials?
-Per month, week, etc..
4)Take pictures and samples (pick samples from various boxes if available)
-Must ask for permission first
5) Discuss pricing/ shipment terms.
-Must clarify
6) Ask questions about history of the company.
7)Ask for price ideas
8)For new clients, follow up with Hong Kong office to ensure materials are as described.
9)Industry the material came from before they got it. |
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Term
| Name some engineering plastics. |
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Definition
Acrylonitrile butadiene styrene (ABS)
Polycarbonates (PC)
Polyamides (PA)
Polybutylene terephthalate (PBT)
Polyethylene terephthalate (PET)
Polyphenylene oxide (PPO)
Polysulphone (PSU)
Polyetherketone (PEK)
Polyetheretherketone (PEEK)
Polyimides
Polyphenylene sulfide (PPS)
Polyoxymethylene plastic (POM) |
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Term
| What is another name for PA? |
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Definition
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Term
Describe the types of flame these plastics emit:
PVC
PP
PE
PS |
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Definition
PE (polyethylene): Blue flame with yellow tip, melts and drips
PP (polypropylene): Yellow flame with blue base
PS (polystyrene): Yellow, sooty flame and drips
PVC (polyvinyl chloride): Yellow and sooty smoke. It will not continue to burn if the flame is removed |
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Term
Describe the types of flame these plastics emit:
PVC
PP
PE
PS |
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Definition
PE (polyethylene): Blue flame with yellow tip, melts and drips
PP (polypropylene): Yellow flame with blue base
PS (polystyrene): Yellow, sooty flame and drips
PVC (polyvinyl chloride): Yellow and sooty smoke. It will not continue to burn if the flame is removed |
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Term
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Definition
[image]
The process begins by heating the stock material. It is then loaded into the container in the press. A dummy block is placed behind it where the ram then presses on the material to push it out of the die. Afterward the extrusion is stretched in order to straighten it. If better properties are required then it may be heat treated or cold worked.[2]
The extrusion ratio is defined as the starting cross-sectional area divided by the cross-sectional area of the final extrusion. One of the main advantages of the extrusion process is that this ratio can be very large while still producing quality parts.
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Term
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Definition
Blow molding, also known as blow forming, is a manufacturing process by which hollow plastic parts are formed. In general, there are three main types of blow molding: extrusion blow molding, injection blow molding, and stretch blow molding. The blow molding process begins with melting down the plastic and forming it into a parison or preform. The parison is a tube-like piece of plastic with a hole in one end in which compressed air can pass through.
The parison is then clamped into a mold and air is pumped into it. The air pressure then pushes the plastic out to match the mold. Once the plastic has cooled and hardened the mold opens up and the part is ejected.
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