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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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Bags, Film, Sheet, high and low density polyethylene washing and drying Line
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::2012/05/02::
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Wicketed Bread Bags -  Low Density Polyethylene
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::2014/07/23::
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MYOG low-density polyethylene (LDPE) tarptent - Part 2
MYOG low-density polyethylene (LDPE) tarptent - Part 2
::2010/08/16::
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MYOG low-density polyethylene (LDPE) tarptent - Part 1
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::2012/07/29::
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::2013/07/03::
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Crystalisation of Low Density Polyethylene (LDPE)
Crystalisation of Low Density Polyethylene (LDPE)
::2009/05/18::
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Linear Low-Density Polyethylene Structure
Linear Low-Density Polyethylene Structure
::2014/09/22::
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Polymer Detectives - Science Olympiad - Video 2 - HDPE, LDPE, PP
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::2012/01/09::
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LDPE sheets manufacturer,supplier by GARG INDUSTRIES,Delhi
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::2013/08/16::
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hdpe high density polyethylene
hdpe high density polyethylene
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::2012/10/29::
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Das Band - Fine Polyethylene Extruder.
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Polyethylene
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::2010/11/30::
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Secondary granule PE-100, PE-80, PS,PP,LDPE,HDPE.wmv
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::2012/04/05::
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Poly Bags -Plastic Polyethylene Bags -WHITTCO Industrial Supplies
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::2014/09/22::
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::2014/09/25::
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ICIS polyethylene overview
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::2012/09/19::
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=D Fracture of Medium Density Polyethylene
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::2013/02/01::
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LDPE or Glass,which is better?Choose!
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::2010/08/21::
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PTA-M 250X4, Protection Tape Application machine
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::2014/09/19::
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Bharat Book Presents : India Polyethylene Report 2013   Demand , Supply , Import Export
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::2014/03/14::
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Polyethylene Bagging Film
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::2013/05/01::
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EPE(LDPE) Foam Net Extruder Line/Fruit or vegetables packaging Net Production Line
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::2013/05/15::
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POLYCO - Thank You (low res)
POLYCO - Thank You (low res)
::2014/06/26::
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Gravity separation of common polymers
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::2012/10/28::
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Plastic Packaging Material - Iris Polymars Pune
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::2014/08/12::
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::2014/07/01::
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DP401 Double Coated Tape from Shurtape
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::2014/07/28::
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Stretch Hood Bagger / Clear View Pack - Water Heaters - MSK
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::2014/07/01::
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Moulding  Recycled  High Density  Polyethylene (HDPE 2 )
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::2013/11/19::
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Scumak No. 1, 1998
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::2014/04/29::
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Product Spotlight: Dispensing Jugs
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::2014/08/20::
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demonstration of high impact poly styrene sheets hips making for vacuum forming & thermoforming
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::2013/10/21::
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RTI Cryogenics Inc. - XyCom TPE Demo June 2012
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::2013/03/27::
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black hips sheet
black hips sheet
::2013/09/25::
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Traffic Safety Service
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::2014/05/02::
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TARGET FACTORY DLX TRGT W/BTTL
TARGET FACTORY DLX TRGT W/BTTL
::2014/06/30::
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agricultural trays
agricultural trays
::2013/10/16::
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45
FXR - Brodie Toffan & FAST Floatation Assistance Technology
FXR - Brodie Toffan & FAST Floatation Assistance Technology
::2014/05/12::
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Bottle of Love
Bottle of Love
::2012/01/03::
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47
VERSAPIPE FUSION | Butt and Electro Fusion "SUMMARIZED"
VERSAPIPE FUSION | Butt and Electro Fusion "SUMMARIZED"
::2014/01/02::
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48
FRANCIS Tristan, Polyethylene VLOG
FRANCIS Tristan, Polyethylene VLOG
::2014/04/26::
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49
Polymer Structures
Polymer Structures
::2012/12/06::
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50
FXR FAST Floatation Assistance Technology
FXR FAST Floatation Assistance Technology
::2014/05/12::
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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

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