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1
7. production of low density and high density polyethylene (HSC chemistry)
7. production of low density and high density polyethylene (HSC chemistry)
::2011/12/14::
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2
What is LDPE?
What is LDPE?
::2009/10/07::
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3
Polyethylene PE Film - How it
Polyethylene PE Film - How it's made
::2012/11/30::
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4
Bags, Film, Sheet, high and low density polyethylene washing and drying Line
Bags, Film, Sheet, high and low density polyethylene washing and drying Line
::2012/05/02::
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5
Wicketed Bread Bags -  Low Density Polyethylene
Wicketed Bread Bags - Low Density Polyethylene
::2014/07/23::
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6
110,000 Ton/Year Low Density Polyethylene (LDPE) Plant for Sale
110,000 Ton/Year Low Density Polyethylene (LDPE) Plant for Sale
::2013/07/03::
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7
Polymer Detectives - Science Olympiad - Video 2 - HDPE, LDPE, PP
Polymer Detectives - Science Olympiad - Video 2 - HDPE, LDPE, PP
::2012/01/09::
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8
MYOG low-density polyethylene (LDPE) tarptent - Part 1
MYOG low-density polyethylene (LDPE) tarptent - Part 1
::2010/08/16::
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9
Low Density Polyethylene Disposable Gloves 500Box/2Carton/20Case
Low Density Polyethylene Disposable Gloves 500Box/2Carton/20Case
::2012/07/29::
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10
MYOG low-density polyethylene (LDPE) tarptent - Part 2
MYOG low-density polyethylene (LDPE) tarptent - Part 2
::2010/08/16::
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11
Crystalisation of Low Density Polyethylene (LDPE)
Crystalisation of Low Density Polyethylene (LDPE)
::2009/05/18::
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12
Low-density polyethylene
Low-density polyethylene
::2014/10/10::
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13
Linear Low Density Plastic vs High Density Plastic
Linear Low Density Plastic vs High Density Plastic
::2011/11/02::
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14
Low Density Polyethylene (LDPE) Uses
Low Density Polyethylene (LDPE) Uses
::2014/10/26::
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15
Hdpe Scrap,Hdpe Waste,High Density Polyethylene Scrap
Hdpe Scrap,Hdpe Waste,High Density Polyethylene Scrap
::2013/07/30::
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16
hdpe high density polyethylene
hdpe high density polyethylene
::2014/04/04::
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17
LDPE sheets manufacturer,supplier by GARG INDUSTRIES,Delhi
LDPE sheets manufacturer,supplier by GARG INDUSTRIES,Delhi
::2013/08/16::
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18
Moulding  Recycled  High Density  Polyethylene (HDPE 2 )
Moulding Recycled High Density Polyethylene (HDPE 2 )
::2013/11/19::
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19
Das Band - Fine Polyethylene Extruder.
Das Band - Fine Polyethylene Extruder.
::2013/01/03::
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20
Polyethylene
Polyethylene
::2010/11/30::
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21
Double colors strip Film Blowing machine(HDPE / LDPE film)
Double colors strip Film Blowing machine(HDPE / LDPE film)
::2012/10/29::
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22
Poly Bags -Plastic Polyethylene Bags -WHITTCO Industrial Supplies
Poly Bags -Plastic Polyethylene Bags -WHITTCO Industrial Supplies
::2014/09/22::
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23
EPE(LDPE) Foam Net Extruder Line/Fruit or vegetables packaging Net Production Line
EPE(LDPE) Foam Net Extruder Line/Fruit or vegetables packaging Net Production Line
::2013/05/15::
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24
Stretching of LDPE between crossed polarisers
Stretching of LDPE between crossed polarisers
::2009/03/04::
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25
How To Recycle HDPE Plastic (High Density Polyethylene) - a simple method
How To Recycle HDPE Plastic (High Density Polyethylene) - a simple method
::2012/12/07::
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Industrial Film LDPE Film Recycling Line Malaysia
Industrial Film LDPE Film Recycling Line Malaysia
::2013/09/04::
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27
Polyethylene Bagging Film
Polyethylene Bagging Film
::2013/05/01::
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28
( LDPE ) MINI TYPE AIR COOLING  PLASTIC WASTE RECYCLE MACHINE (CT-RZ-85A)
( LDPE ) MINI TYPE AIR COOLING PLASTIC WASTE RECYCLE MACHINE (CT-RZ-85A)
::2011/02/11::
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29
Secondary granule PE-100, PE-80, PS,PP,LDPE,HDPE.wmv
Secondary granule PE-100, PE-80, PS,PP,LDPE,HDPE.wmv
::2012/04/05::
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30
=D Fracture of Medium Density Polyethylene
=D Fracture of Medium Density Polyethylene
::2013/02/01::
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31
HIGH DENSITY POLYETHYLENE by Khushi Enterprises
HIGH DENSITY POLYETHYLENE by Khushi Enterprises
::2013/10/22::
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32
Polymer Structures
Polymer Structures
::2012/12/06::
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33
High Density Polyethylene Mortar tube
High Density Polyethylene Mortar tube
::2013/02/13::
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34
Gravity separation of common polymers
Gravity separation of common polymers
::2012/10/28::
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35
high density polyethylene (HDPE) fittings and fusion machinery
high density polyethylene (HDPE) fittings and fusion machinery
::2014/04/29::
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36
ICIS polyethylene overview
ICIS polyethylene overview
::2012/09/19::
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37
Global Polyethylene  Market Size, Analysis, Share, Research, Growth, Trends  2014-2018
Global Polyethylene Market Size, Analysis, Share, Research, Growth, Trends 2014-2018
::2014/09/25::
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38
Crystalisation of High Density Polyethylene (HDPE)
Crystalisation of High Density Polyethylene (HDPE)
::2009/05/18::
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39
Stretch hood pallet wrapper / ClearView Pack - Water Heaters - MSK
Stretch hood pallet wrapper / ClearView Pack - Water Heaters - MSK
::2014/07/01::
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40
Bharat Book Presents : India Polyethylene Report 2013   Demand , Supply , Import Export
Bharat Book Presents : India Polyethylene Report 2013 Demand , Supply , Import Export
::2014/03/14::
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41
Product Spotlight: LDPE, HDPE and Polypropylene Sheet
Product Spotlight: LDPE, HDPE and Polypropylene Sheet
::2014/05/21::
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42
Polyethylene Granules,HDPE Granules Manufacturers
Polyethylene Granules,HDPE Granules Manufacturers
::2013/07/30::
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43
Agri Film LDPE Film Recycling Line Japan
Agri Film LDPE Film Recycling Line Japan
::2013/09/04::
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44
DP401 Double Coated Tape from Shurtape
DP401 Double Coated Tape from Shurtape
::2014/07/28::
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45
LDPE or Glass,which is better?Choose!
LDPE or Glass,which is better?Choose!
::2010/08/21::
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46
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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47
Agriculture LDPE Film Recycling Line Test in Taiwan
Agriculture LDPE Film Recycling Line Test in Taiwan
::2013/09/04::
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48
Recycling for Cosplay
Recycling for Cosplay
::2014/09/23::
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49
Bottle of Love
Bottle of Love
::2012/01/03::
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50
High Density Polyethylene
High Density Polyethylene
::2012/09/24::
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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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