Packaging bag with weak sealed duct
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
May 9, 2006
Grant Date -
Jun 5, 2003
app pub date -
Jul 30, 2002
filing date -
Aug 6, 2001
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A packaging material capable of having a desired sealing strength with ease and a packaging bag using such material are provided. A packaging material, which serves as either one of a first and a second packaging materials to be heat-sealed to each other, includes a sealing portion. This sealing portion is relatively weaker in sealing strength and composed of an applied area of a coating agent preventing the heat sealing and a non-applied area of the coating agent. The applied area and the non-applied area are changed in an area size from each other depending on the sealing strength required for the sealing portion.
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