• Different types of Plyers are packed in a 25-Kgs. Bags

Type of BPTTQ Energy Polymers:


Polyethylene is a lightweight, durable thermoplastic with variable crystalline structure. It is one of the most widely produced plastics in the world.

1-Polyethylene (PE)

  • Low-density polyethylene (LDPE)
  • High-density polyethylene (HDPE)
  • Linear low-density polyethylene (LLDPE)

Application of polymers

Ranging for films, tubes, plastic parts, laminates, etc. in several markets (packaging, automotive, electrical, etc.).

Comparison between Main Types of Polyethylene

Polymer Full Name Low Density Polyethylene Linear Low Density Polyethylene High Density Polyethylene
Structure High Degree of short chain branching + long chain branching High Degree of short chain branching Linear (or Low degree of short chain branching)
Catalyst and process Using radical polymerization using tubular method or auto clave method Using Ziegler-Natta catalyst or metallocene catalyst Ziegler-Natta catalyst in:
– Single-stage polymerization
– Multi-stage polymerization or a Cr or Phillips-type catalyst
Density 0.910-0.925 g/cm3 0.91-0.94 g/cm3 0.941-0.965 g/cm3
Crystallinity Low crystalline and high amorphous (less than 50-60% crystalline) Semi-crystalline, level between 35 to 60% High crystalline and low amorphous (>90% crystalline)
  • Flexible and good transparency
  • Good moisture barrier properties
  • High impact strength at low temperature
  • Excellent resistance to acids, bases and vegetable oils
As compared to LDPE, it has:

  • higher tensile strength
  • higher impact and puncture resistance
  • Excellent Chemical Resistance
  • High tensile strength
  • Excellent moisture barrier properties
  • Hard to semi-flexible
Recycling Code
General Applications Shrink wrap, films, squeezable bottles garbage bags, extrusion moldings, and laminates High performance bags, cushioning films, tire separator films, industrial liners, elastic films, ice bags, bags for supplemental packaging and garbage bags
  • Molecular weight distribution is relatively narrow, has applications in injection moldings or flat yarns, and the latter type
  • Molecular weight distribution is wide, is used to make film products, hollow plastic products and pipes