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7. production of low density and high density polyethylene (HSC chemistry)
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Polyethylene PE Film - How it
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What is LDPE?
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110,000 Ton/Year Low Density Polyethylene (LDPE) Plant for Sale
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Low-density polyethylene
Low-density polyethylene
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MYOG low-density polyethylene (LDPE) tarptent - Part 1
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Polymer Detectives - Science Olympiad - Video 2 - HDPE, LDPE, PP
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Wicketed Bread Bags -  Low Density Polyethylene
Wicketed Bread Bags - Low Density Polyethylene
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MYOG low-density polyethylene (LDPE) tarptent - Part 2
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Crystalisation of Low Density Polyethylene (LDPE)
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Low Density Polyethylene Disposable Gloves 500Box/2Carton/20Case
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Low Density Polyethylene (LDPE) Uses
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Low Density Polyethylene (LDPE) Market - Latest Research Report, 2014 - 2020
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hdpe high density polyethylene
hdpe high density polyethylene
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Das Band - Fine Polyethylene Extruder.
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Hdpe Scrap,Hdpe Waste,High Density Polyethylene Scrap
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::2012/10/29::
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Polyethylene
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Blown Film Extrusion Process for Extrusion of LDPE | Blown Film Extrusion Machine Manufacturers
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::2014/10/08::
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Stretching of LDPE between crossed polarisers
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Poly Bags -Plastic Polyethylene Bags -WHITTCO Industrial Supplies
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Engineering Jobs Process Production LDPE Mfg Plant Lake Charles LA
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Enviro-Cone Introduction
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LDPE and HDPE Mechanical Behavior
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::2011/06/22::
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Polymer Structures
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Gravity separation of common polymers
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::2012/10/28::
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ICIS polyethylene overview
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Crystalisation of High Density Polyethylene (HDPE)
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::2014/11/05::
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::2014/09/25::
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TARGET FACTORY DLX TRGT W/BTTL
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::2014/06/30::
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Kun Sheng Machine - LDPE Film Pelletizing machine
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FXR - Brodie Toffan & FAST Floatation Assistance Technology
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::2014/05/12::
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LDPE or Glass,which is better?Choose!
LDPE or Glass,which is better?Choose!
::2010/08/21::
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Product Spotlight: LDPE, HDPE and Polypropylene Sheet
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::2014/05/21::
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demonstration of high impact poly styrene sheets hips making for vacuum forming & thermoforming
demonstration of high impact poly styrene sheets hips making for vacuum forming & thermoforming
::2013/10/21::
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Compliance Wheel Stop
Compliance Wheel Stop
::2014/09/30::
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49
Slow Motion Fusion of HDPE (high-density polyethylene pipe) on McElroy Machine
Slow Motion Fusion of HDPE (high-density polyethylene pipe) on McElroy Machine
::2014/09/23::
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cooling tower fill forming machine
cooling tower fill forming machine
::2013/09/24::
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RESULTS [51 .. 101]
From Wikipedia, the free encyclopedia
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LDPE has SPI resin ID code 4

Low-density polyethylene (LDPE) is a thermoplastic made from the monomer ethylene. It was the first grade of polyethylene, produced in 1933 by Imperial Chemical Industries (ICI) using a high pressure process via free radical polymerization.[1] Its manufacture employs the same method today. The EPA estimates 5.7% of LDPE (recycling number 4) is recycled.[2] Despite competition from more modern polymers, LDPE continues to be an important plastic grade. In 2009 the worldwide LDPE market reached a volume of US$22.2 billion (15.9 billion).[3]

Properties[edit]

LDPE is defined by a density range of 0.910–0.940 g/cm3. It is not reactive at room temperatures, except by strong oxidizing agents, and some solvents cause swelling. It can withstand temperatures of 80 °C continuously and 95 °C for a short time. Made in translucent or opaque variations, it is quite flexible, and tough but breakable.[citation needed]

LDPE has more branching (on about 2% of the carbon atoms) than HDPE, so its intermolecular forces (instantaneous-dipole induced-dipole attraction) are weaker, its tensile strength is lower, and its resilience is higher. Also, since its molecules are less tightly packed and less crystalline because of the side branches, its density is lower. LDPE contains the chemical elements carbon and hydrogen.

Chemical resistance[edit]

Applications[edit]

A GEECO bowl, c.1950, still used in 2014.

LDPE is widely used for manufacturing various containers, dispensing bottles, wash bottles, tubing, plastic bags for computer components, and various molded laboratory equipment. Its most common use is in plastic bags. Other products made from it include:

See also[edit]

References[edit]

External links[edit]

2010_MSW_Tables_and_Figures_508.pdf. epa.gov

Wikipedia content is licensed under the GFDL License
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