Gas-tight laminated plastic film containing polymer of organosilicic compound

• US 5,641,559 A
• Filed: 07/11/1995
• Issued: 06/24/1997
• Est. Priority Date: 10/23/1992
• Status: Expired due to Term

• Current Assignee: TOYO Seikan Kaisha Limited (Toyo Seikan Group Holdings, Ltd.)
• Original Assignee: TOYO Seikan Kaisha Limited (Toyo Seikan Group Holdings, Ltd.)
• Inventors: Namiki, Tsunehisa
• Primary Examiner(s): NAKARANI, DHIRAJLAL S
• Application Number:
  US08/500,679
• Time in Patent Office: 714 Days
• Field of Search: 428/35.4, 428/35.7, 428/213, 428/215, 428/216, 428/336, 428/446, 428/447, 428/448, 428/451, 428/452, 428/480
• US Class Current: 428/216
• CPC Class Codes: B05D 1/62 Plasma-deposition of organic layers plasma deposition in general C23C14/00, C23C16/00
• CPC Class Codes: B05D 2201/00 Polymeric substrate or laminate
• CPC Class Codes: B65D 1/0215 multilayered B65D81/3837 takes precedence
• CPC Class Codes: C08J 7/0423 with at least one layer of inorganic material and at least one layer of a composition containing a polymer binder
• CPC Class Codes: C08J 7/048 Forming gas barrier coatings
• CPC Class Codes: C23C 14/046 Coating cavities or hollow spaces, e.g. interior of tubes; Infiltration of porous substrates
• CPC Class Codes: C23C 14/10 Glass or silica
• CPC Class Codes: C23C 16/30 Deposition of compounds, mixtures or solid solutions, e.g. borides, carbides, nitrides
• CPC Class Codes: Y10T 428/24967 Absolute thicknesses specified
• CPC Class Codes: Y10T 428/24975 No layer or component greater than 5 mils thick
• CPC Class Codes: Y10T 428/265 1 mil or less
• CPC Class Codes: Y10T 428/31667 Next to addition polymer from unsaturated monomers, or aldehyde or ketone condensation product
• CPC Class Codes: Y10T 428/31786 Of polyester [e.g., alkyd, etc.]

Abstract

A first layer made of a polymer of organosilicic compound containing at least silicon, oxygen and carbon is formed over a plastic substrate, and a second layer made of silicon oxide is then formed over the first layer, and the first and second layers in combination exhibit excellent gas-tight characteristics.

Claims

1. A gas-tight laminated plastic film material comprising:

a plastic film;

a first layer formed over said plastic film and made of polymer of organosilicic compound containing more than 15% silicon element, more than 20% carbon element and the balance oxygen element, based on 100% of the silicon, carbon and oxygen elements; and

a second layer formed over said first layer and made of more than 60% silicon oxide expressed as SiO_x wherein x is 1.5 to 2.0.

2. A gas tight laminated plastic film material as set forth in claim 1, wherein said second layer consists of a silicon oxide compound, and its composition is SiO_x, wherein x=1.5 to 2.0.

3. A gas-tight laminated plastic film material as set forth in claim 1, wherein said first layer has a film thickness of 0.01 to 0.1 μ

m, and said second layer has a film thickness of 0.03 to 0.2 μ

m.

4. A gas-tight laminated plastic sheet material comprising:

a plastic substrate formed of polypropylene, polyethylene or polyethylene terephthalate;

a first layer formed over said plastic sheet and made of polymer of organosilicic compound containing more than 15% silicon element, more than 20% carbon element and the balance oxygen element, based on 100% of the silicon, carbon and oxygen elements;

and a second layer formed over said first layer and made of more than 60% silicon oxide expressed was SiO_x wherein x is 1.5 to 2.0.