PLASTIC SHEETING: GENERAL TERMINOLOGY
Gloss :
The films surface reflection of light. The degree of sheen of the surface.
Haze :
The degree of cloudiness of the film. Indicates how clearly an object can be seen through the film.
Opaque :
Film that inhibits light transmission. The opposite of transparent.
Tint :
Tiny voids in the film, enabling water, air, etc. to pass through the film.
Translucent :
A film that permits the transmission of light. Clear, transparent.
PLASTIC SHEETING FILM PROPERTIES
Orientation :
Alignment of the crystalline structure in film in both the machine and transverse directions.
Shrink :
The ability of film to conform to an object when reheated. A result of controlled orientation.
Impact Strength :
The ability of a film to withstand shock loading, blunt puncturing, etc.
Tensile Yield :
The pulling stress required to deform a given film specimen.
Tensile Break :
The pulling stress required to break a given film specimen.
Elongation :
A measure of how much a film can stretch over a given load profile.
Coefficient of Friction :
The ratio of a frictional gravitational force to the perpendicular force of the two surfaces in contact.
Treat: A method of altering a polyolefin surface to render it receptive to inks, adhesives, etc.
Water Vapor Transmission Rate :
Rate at which water vapor permeates a plastic film at a specified temperature and relative humidity.
Oxygen Transmission Rate :
Rate at which oxygen permeates a plastic film at a specified temperature and relative humidity
Surface Resistivity :
Measures the electrical resistance of the surface of the plastic.
ADDITIVES
Antiblock :
A silica or DE compound added to film that roughens the surface to prevent blocking.
Antistat: A compound added to film that dissipates the accumulation of static electricity.
Slip: A fatty acid amide added to film to reduce surface friction.
UltravioletAbsorber :
A compound designed to selectively absorb pass through UV rays.
UltraVioletInhibitor :
A compound designed to selectively scavenge destructive free radicals set free by UV rays
UltravioletBlocker :
A compound designed to selectively block pass through UV rays.
Vapor Corrosion Inhibitor :
A compound added to film for the prevention of oxidation or corrosion of packaged parts.
RESIN TYPES & TERMS
Low Density Polyethylene :
An ethylene based thermoplastic polymer with a nominal density of .910-.925.
Medium Density Polyethylene :
An ethylene based thermoplastic polymer with a nominal density of .926-.939.
High Density Polyethylene :
An ethylene based thermoplastic polymer with a nominal density of .940-.965.
Linear Low Density Polyethylene :
A low density, low pressure polymer resulting from the introduction of comonomers to control density.
Butene LLDPE :
Lowest grade of LLDPE, this polymer still outperforms LDPE in strength and sealabilty.
Hexene LLDPE :
Next level of LLDPE, this polymer has improved tear and impact over butene.
Super Hexene LLDPE :
Highest level of LLDPE, has excellent tear strength and dart impact, with optics improving.
Octene LLDPE :
Highest level of LLDPE, has excellent tear strength, very good dart impact and better optics.
Metallocene LLDPE :
LLDPE with unsurpassed dart impact, very high clarity, good tear strength and very good hot tack.
Very Low Density Polyethylene :
A low pressure copolymer with outstanding impact strength, stretch and low temperature sealabilty.
Ethylene Vinyl Acetate :
LDPE that has been copolymerized with ethylene vinyl acetate to enhance strength and sealability.
Thermoplastic :
Polymeric material capable of being repeatedly softened by heat and hardened by cooling.
APPLICATIONS :
- Ponds/ Reservoirs
- Canal Lining
- Rods
Other Applications:
- Agricultural purposes
- Lining of canals, distributaries, reservoirs, ponds
- Lining of Industrial effluent plants, dunnage
- Tunnels, trenches
- Packaging
- Water-proofing for terrace gardens
- Emergency shelter houses during natural calamities
- Fumigation covers, cover Tops, tarpaulins, cap covers
- Aprons & runways at airport
- For covering of food grains, fertilizers, cotton, chemicals, cement & constructions
- Concrete roads and bridges and other such uses
- Sports stadiums
- Salt pans
