Vacuum Packaging

Vacuum Metalized CPP film. The deposition, in a vacuum chamber, of vaporized aluminum molecules over the surface of CPP film thus providing a lustrous metallic appearance. VMCPP film has the same sealability as CPP film but with higher oxygen and moisture barrier property.

VMCPP

Vacuum Metalized CPP film. The deposition, in a vacuum chamber, of vaporized aluminum molecules over the surface of CPP film thus providing a lustrous metallic appearance. VMCPP film has the same sealability as CPP film but with higher oxygen and moisture barrier property.

VMPET

Vacuum Metalized PET film. It has all the good properties of PET film, plus much improved oxygen and water vapors barrier properties.

Web

Web Paper, film, foil, or other flexible material as it is unwound from a roll and passed through a machine.

WVTR

Water vapor transmission rate, usually measured at 100% relative humidity, expressed in grams/100 square inches/24 hours, (or grams/square meter/24 Hrs.) See MVTR.

Yield

The amount of product that can be produced from a given weight of material. Most packaging raw materials are sold by weight. However, because of density differences, the same weight of similar materials can produce different amounts of finished product. For example, the yield for a plastic resin used for film manufacture might be expressed as the number of square meters of film that could be made from 1 kilogram of the material (square inches per pound.) In other instances, the yield might be expressed in terms of volume per unit weight, or the actual number of physical objects per unit weight.