What are the properties of low density polyethylene?
What are the properties of low density polyethylene?
PROPERTIES. Semi-rigid, translucent, very tough, weatherproof, good chemical resistance, low water absorption, easily processed by most methods, low cost.
What is LDPE low density polyethylene used for?
Low density polyethylene (LDPE). This clear or translucent plastic exhibits flexibility, chemical resistance, and waterproofing capabilities. It is used in the manufacture of a wide range of products, including grocery bags, plastic wrap and film, flexible packaging material, and injection molded parts.
What is the hardness of low density polyethylene?
Differences Between HDPE and LPDE
| UNITS | LDPE | |
|---|---|---|
| Hardness Rockwell M&R, Durometer Shore D (73°F) | scale as noted | Shore D 55 |
| Izod impact (notched, 73°F) | ft-lbs/in | no break |
| Coefficient of linear thermal expansion | in/in/°Fx10-5 | – |
| Heat deflection temperature @ 66 psi/264 psi | °F | 122 |
What are the applications of low density polyethylene?
Low Density Polyethylene (LDPE) uses majorly revolve around manufacturing containers, dispensing bottles, wash bottles, tubing, plastic bags for computer components, and various molded laboratory equipments. The most popular application of low density polyethylene is plastic bags.
How do you prepare low density polyethylene?
Low-density polythene: It has a density range of 0.910–0.940 g/cm3 and is prepared by the free-radical polymerization of ethane. The reaction is carried out at a temperature of 350 K to 570 K under the pressure of 1000 to 2000 atmospheres in the presence of a catalyst, dioxygen (in traces) or a peroxide initiator.
What are the disadvantages of low-density polyethylene?
Disadvantages of LDPE
- Susceptible to stress cracking.
- Low strength, stiffness and maximum service temperature. This limits its usage in applications requiring extreme temperatures.
- High gas permeability, particularly carbon dioxide.
- Poor UV resistance.
- Highly flammable.
- High-frequency welding and joining impossible.
Which is cheaper LDPE or HDPE?
HDPE’s formidable structure gives it a higher density than LDPE. The forces of attraction between polymer molecules are strong….In a nutshell: the chemistry of LDPE and HDPE.
| LDPE | HDPE |
|---|---|
| Low cost | Low cost |
What is a low density material?
LDPE (low density polyethylene) is a soft, flexible, lightweight plastic material. LDPE is noted for its low temperature flexibility, toughness, and corrosion resistance.
What are the properties of high density polyethylene?
Physical, chemical properties. The high density polyethylene is a thermoplastic resin. At room temperature the density is between 0,94 and 0,96 g/cm³, about 60 % is crystalline the remaining is amorphous.
What are the characteristics of polyethylene?
Polyethylene is used more than any other thermoplastic polymer . There is a wide variety of grades and formulations available that have an equally wide range of properties. In general, the outstanding characteristics of polyethylene are: Toughness. Ease of processing. Chemical resistance.
What is the density of polyethylene?
The density of the chemical compound Polyethylene is 0.96 grams per cubic centimeter