OXYGEN DIFFUSION AMOUNT MEASURING METHOD, OXYGEN DIFFUSION AMOUNT DEVICE AND HEATING BAG WITH VENT VOLUME SPECIFIED IN TERMS OF OXYGEN DIFFUSION AMOUNT

WIPO Patent Application WO/1998/052015

A1

A vent volume measuring method and a vent volume measuring apparatus, which can measure a vent volume of a permeable packaging material for use with heating bags in a short time, irrespective of pore diameter and material of the packaging material, and have a correlation between a vent volume and a heating characteristics. Further, a heating bag is provided which has a stable heating characteristics. An oxygen diffusion amount, which passes diffusingly through the permeable packaging material from the atmosphere side, are measured by exposing one surface of the permeable packaging material to the atmosphere, scavenging the other surface with a carrier gas, which does not contain oxygen, and measuring and oxygen concentration in the carrier gas after scavenging. Also, provided are heating bags for body, pocket and shoes, of which vent volume is specified in terms of oxygen diffusion amount.

KOISO YASUHIKO (JP)
WAGATSUMA NAOTO (JP)
MATSUMOTO YOSHIKI (JP)
FUJISAWA MASAYUKI (JP)
YATA KOICHI (JP)
OCHI KOHSHI (JP)

PCT/JP1998/002159

November 19, 1998

May 15, 1998

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JAPAN PAIONICS CO LTD (JP)
KOISO YASUHIKO (JP)
WAGATSUMA NAOTO (JP)
MATSUMOTO YOSHIKI (JP)
FUJISAWA MASAYUKI (JP)
YATA KOICHI (JP)
OCHI KOHSHI (JP)

A61F7/03; G01N13/00; G01N15/08; (IPC1-7): G01N15/08; A61F7/08

JPH04329337A	1992-11-18
JPS63236943A	1988-10-03
JPH0880317A	1996-03-26
JPS62183759A	1987-08-12

Inaba, Yoshiyuki (Suite 803 37 Mori Building, 5-1, Toranomon 3-chom, Minato-ku Tokyo, JP)

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