Barrier films, vacuum insulation panels and moisture barrier bags employing same

Patent metadata

Field	Value
Publication number	US-2018169697-A1
Application number	US-201615735293-A
Country	US
Kind code	A1
Filing date	Jun 9, 2016
Priority date	Jun 16, 2015
Publication date	Jun 21, 2018
Grant date	—

Abstract

There is provided a barrier film having a substrate, a low thermal conductivity organic layer and an inorganic stack. The inorganic stack will include a low thermal conductivity non-metallic inorganic material layer and a high thermal conductivity metallic material layer.

First claim

1 . A barrier film comprising:
(a) a substrate having two opposing major surfaces; (b) a first layer in direct contact with one of the opposing major surfaces of the substrate, wherein the first layer is an inorganic stack or a low thermal conductivity organic layer or; and (c) a second layer in direct contact with the first layer, wherein the second layer is an inorganic stack or a low thermal conductivity organic layer, and wherein the second layer is not the same as that selected in the first layer; wherein the inorganic stack comprises a low thermal conductivity non-metallic inorganic material layer and a high electrical conductivity metallic material layer having a high thermal resistance in the plane of the high electrical conductivity metallic material layer; wherein the barrier film is semitransparent.

2 . The barrier film of claim 1 , wherein the high electrical conductivity metallic material layer comprises a high electrical conductivity metallic material.

3 . The barrier film of claim 2 , wherein the high electrical conductivity metallic material has an electrical conductivity of more than 1.5×10 7 Siemens/m

4 . The barrier film of claim 3 , the high electrical conductivity metallic material are selected from at least one of aluminum, silver, gold, copper, beryllium, tungsten, magnesium, rhodium, iridium, molybdenum, zinc, bronze, or combinations of the same.

5 . The barrier film of claim 1 , wherein the low thermal conductivity non-metallic inorganic material layer comprises a low thermal conductivity non-metallic inorganic material and the low thermal conductivity non-metallic inorganic material is selected from at least one of aluminum oxide, silicon oxide, aluminum-silicon-oxide, aluminum-silicon-nitride, and aluminum-silicon-oxy-nitride CuO, TiO 2 , ITO, Si 3 N 4 , TiN, ZnO, aluminum zinc oxide, ZrO 2 , yttria-stabilized zirconia and Ca 2 SiO 4 .

6 . The barrier film of claim 1 , further comprising an additional low thermal conductivity organic layer.

7 . The barrier film of claim 1 , further comprising a flame retardant layer in direct contact with an opposing major surface of the substrate opposite the first layer.

8 . The barrier film of claim 1 , wherein the barrier film has a Rs of less than 50 Ohms/sq.

9 . The barrier film of claim 1 , wherein the barrier film has a static decay time of less than 2 seconds.

10 . The barrier film of claim 1 , wherein the barrier film has an electrostatic shielding of less than 10 nanoJoules.

11 . The barrier film of claim 1 , wherein the barrier film has a water vapor transmission rate of less than 0.031 g/m 2 /day.

12 . An article comprising a vacuum insulation panel envelope comprising:
(a) a substrate having two opposing major surfaces; (b) a first layer in direct contact with one of the opposing major surfaces of the substrate, wherein the first layer is an inorganic stack or a low thermal conductivity organic layer or; and (c) a second layer in direct contact with the first layer, wherein the second layer is an inorganic stack or a low thermal conductivity organic layer, and wherein the second layer is not the same as that selected in the first layer; wherein the inorganic stack comprises a low thermal conductivity non-metallic inorganic material layer and a high electrical conductivity metallic material layer having a high thermal resistance in the plane of the high electrical conductivity metallic material layer.

13 - 18 . (canceled)

19 . The article of claim 11 , wherein the substrate comprises a flame retardant material.

20 . The article of claim 11 , further comprising a flame retardant layer in direct contact with an opposing major surface of the substrate opposite the first layer.

21 . The article of claim 11 , wherein the vacuum insulation panel envelope further comprises a core layer.

22 . The article of claim 11 , wherein the vacuum insulation panel envelope has a moisture vapor transmission rate of less than 0.2 g/m 2 /day.

23 . The article of claim 11 , wherein the vacuum insulation panel envelope has an electrostatic shielding of less than 10 nanoJoules.

24 . An article comprising a moisture barrier bag comprising:
(a) a substrate having two opposing major surfaces; (b) a first layer in direct contact with one of the opposing major surfaces of the substrate, wherein the first layer is an inorganic stack or a low thermal conductivity organic layer or; and (c) a second layer in direct contact with the first layer, wherein the second layer is an inorganic stack or a low thermal conductivity organic layer, and wherein the second layer is not the same as that selected in the first layer; wherein the inorganic stack comprises a low thermal conductivity non-metallic inorganic material layer and a high electrical conductivity metallic material layer having a high thermal resistance in the plane of the high electrical conductivity metallic material layer; wherein the barrier film is semitransparent.

25 . The article of claim 24 , wherein the moisture barrier bag has a static decay time of less than 2 seconds

Assignees

• 3M Innovative Properties Co

Inventors

• Merton Christopher A
• Yu Ta-Hua
• Lyons Christopher S
• Chia Kam Poi
• Beamer Brent
• Bedoya Cedric
• Engen Paul T
• Preszler Prince Amy

Classifications

• B32B2307/31

  Heat sealable · CPC title

• B32B15/20

  comprising aluminium or copper {(B32B15/016 and B32B15/017 take precedence)} · CPC title

• B32B27/308

  comprising acrylic (co)polymers · CPC title

• B32B27/36

  comprising polyesters · CPC title

• B32B2255/10

  on synthetic resin layer or on natural or synthetic rubber layer · CPC title