MOISTURE ABSORPTION PACKAGING MATERIAL WITH SEALED STRUCTURE TYPE CHUCK

摘要

PROBLEM TO BE SOLVED: To provide a moisture absorption packaging material with a sealed structure type chuck having a high sealing property which can control moisture permeation into a packaging material and also can keep atmosphere of contents in a dry state.

SOLUTION: The moisture absorption packaging material with the sealed structure type chuck 10 is composed of two pieces of a laminated film 40 with a moisture impermeable outer layer 20 and an inner layer 30 containing a polyolefin and includes a bag body 50 with an opening 52 and a plastic chuck 60 part to seal the opening 52 and the chuck part 60 has chucks 70, 71 and penetration holes 75, 76 formed between them. The inner layer 30 has a hygroscopic plastic layer 32 with a polyolefin containing zeolite and also having a density of 0.880 to 0.930 g/ml and a pair of zeolite non-containing polyolefin layers 34, 34 with a polyolefin containing no zeolite and having a density of 0.910 to 0.960 g/ml. A pair of zeolite non-containing polyolefin 34, 34 are laminated on both sides of the hygroscopic plastic layer 32 like sandwiching the hygroscopic plastic layer 32.

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