Laser Scoring to Control Gas-Vapor Transmission in Sealed Packaging

摘要

An adjustable system for controlling an amount of gas permeability allowed through multilayer material. A laser is controlled through a controller, and the laser processes the multiple layer material to remove only some of the layers in only an area. The area can be a pattern such as a line, or can just be a pattern of areas. The layers are removed without fully penetrating the material, thus adjusting the gas permeability. This allows gases and vapors to transmit into the package thru the scored area more specifically thru the remaining material at a faster rate than a non-scored material. The pattern can score along a line to allow gases and vapors to pass through more rapidly. The laser beam does not cut through the entire structure, and the package remains sealed. This means, therefore, that the amount of gas/vapor permeability can be changed for a sealed package, e.g., with material therein.

主权项

1. A system for laser scoring a material, comprising a laser and a controller, said laser controlled to process a multi-layer web of material and to remove material from at least one layer of the multi layer material without fully penetrating the material, said controller defining a pattern on which the material is processed to remove the at least one layer,
said controller operating to create a processed material which is sealed but which has a specified gas/vapor permeability.