LDPE

LDPE 4-1


Properties

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.

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.

 Applications

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:

  • Trays and general purpose containersLDPE Products 2
  • Corrosion-resistant work surfaces
  • Parts that need to be weld able and machinable
  • Parts that require flexibility, for which it serves very well
  • Very soft and pliable parts such as snap-on lidsLDPE Products1
  • Six pack rings
  • Juice and milk cartons are made of liquid packaging board, a laminate of paperboard and LDPE (as the waterproof inner and outer layer), and often with of a layer of aluminum foil (thus becoming aseptic packaging)
  • Packaging for computer hardware, such as hard disk drives, screen cards, and optical disc drives
  • Playground slides
  • Plastic wraps

 

Grade          Density MFI     Application   Processing Method                                             
1800 S 0.917 20.0

   Caps & Closures Sports, Leisure and Toys

Injection Moulding

2420 D 0.923 0.25

   Bottles for Consumer Goods, Bags & Pouches Film, 
  Shrink Film, Blown Film, Cast Film

Blown Film 
Injection Moulding
Extrusion Blow Moulding

2420 F 0.923 0.75

   Blow Moulding Application

Blown Film
Injection Moulding
Extrusion BlowMoulding

2420 H 0.924 1.9

  Bags & Pouches Film, Shrink Film, Blown Film, Cast Film

Cast Film
Blown Film

2426 F 0.924 0.75

 Cast & Blown Film, Bags&Pouches, Film &Shrink Film, 

​ Food Packaging Film, Surfacen Protection Film

Cast Film
Blown Film

2426 H 0.924 1.9

 Bags & Pouches Film, Shrink Film, Blown Film, Cast Film

 Cast Film
Blown Film

2426 K 0.924 4.0  Cast & Blown Film, Bags&Pouches, Film &Shrink Film, 

 

​ Food Packaging Film, Surfacen Protection Film

Cast Film
Blown Film

3020 F 0.927 0.9

 Cast & Blown Film, Bags&Pouches, Film &Shrink Film,
Food Packaging Film, Surfacen Protection Film

Blown Film

3020 H 0.927 2.0  Cast & Blown Film, Bags&Pouches, Film &Shrink Film,

 

 Food Packaging Film, Surfacen Protection Film

Cast Film
Blown Film

3020 K 0.927 4.0  Cast & Blown Film, Bags&Pouches, Film &Shrink Film,

 

 Food Packaging Film, Surfacen Protection Film

Cast Film
Blown Film
Injection Moulding

3026 H 0.927 2.0  Cast & Blown Film, Bags&Pouches, Film &Shrink Film,

 

 Food Packaging Film, Surfacen Protection Film

Cast Film
Blown Film

3026 K 0.927 4.0  Cast & Blown Film, Bags&Pouches, Film &Shrink Film,

 

 Food Packaging Film, Surfacen Protection Film

Cast Film
Blown Film
Injection Moulding