PE Polyethylene Films
PE Polyethylene Films
Properties of PE films
Polyethylene belongs to the polyolefins. Properties of standard polyethylene are: high toughness, very good electrical properties, very low water absorption, low water vapor permeability, high resistance to attack by chemicals, resistance to stress cracking, good processability.
The following 4 types of polyethylene are mainly distinguished:
PE-LD: Low Density Polyethylene/ Low Density
Due to the lower density of this polyethylene, it is lighter in weight but has a higher tensile strength as well as elasticity. The polyethylene is characterized by a soft, tough and flexible property. The melting point is about 105 °C.
Advantages of PE-LD films:
- High tensile strength
- Resistant to acids and bases
- Good weldability, shrinkability
PE-HD: High Density Polyethylene/High Density
HDPE has the highest tensile strength and tear strength, as well as the lowest flexibility and vapor permeability. HDPE is mainly used for thin films due to its increased strength. The film has a stiff and crackling feel compared to LDPE. The melting point is about 140 °C.
Advantages of HDPE films:
- Thinner films possible
- High water vapor barrier properties
- More resistant to chemicals and heat than LDPE
- Not suitable for materials with high fat content
PE-MD: Medium Density Polyethylene/MD
MD is produced by blending LDPE and HDPE or directly as a copolymer LLDPE, combines the properties of HDPE and LDPE. It has better barrier properties than LDPE, but is more flexible than HDPE. In feel, MDPE is softer than HDPE, but stiffer than LDPE. We do not supply PE-MD films.
PE-LLD: Linear Low Density Polyethylene/ Linear Low Pressure Polyethylene
PE-LLD is produced by the polymerization of ethene and olefins (butene, hexene and octene). The material has excellent stretching and stretching properties and is mainly used for stretch films. We do not supply PE-LLD films.
As can be seen from the manufacturing processes, the basic properties of polyethylene are determined without the effect of possible additives.
The molecular structure is decisive:
- degree of crystallinity (degree of branching, density)
- Degree of polymerization
- Average molar mass
- Distribution of molar mass
Copolymerization with vinyl acetate (E/VA) has a stronger influence on the properties of PE – especially PE-HD – than the admixture of polyisobuylene and rubber or even PE-LD.
Colors of PE films: black, white and transparent
PE films are supplied in black, white and transparent colors. Transparent is in stock in different thicknesses. White PE film is also in stock in 3 different thicknesses.
Forms of delivery of the PE films
We supply the film in master rolls, ready-cut in narrow rolls on disc spools or on cross-wound spools, as cut-to-size or as punched parts.