EP0460469A1
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Extrudable EMI shielding film
Assignee: WR Grace and Co Conn
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Filing: 1991-05-24
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Granted: —
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Expires: 2011-05-24
Abstract
Abstract Disclosed is a conductive metallized flexible thermoplastic film for packaging static sensitive devices, such as electronic circuit boards. The film may be made by extruding metal fibers or strands together with a thermoplastic polymer. Preferred metal strands are stainless steel. The films may be oriented, heat-shrinkable films. They afford ESD and EMI protection, and are called Type# film.
Inventors
- 👤 Marvin Russel Havens
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-01 16:29
CPC Classifications
C; C08; C08K; C08K7/00; C08K7/02; C08K7/04; C08K7/06; C08J; C08J5/00; C08J5/18; H; H05; H05F; H05F3/00; H05F3/02; H05K; H05K9/00; H05K9/0073; H05K9/0081; H05K9/009
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
23 words
A flexible metallized thermoplastic extruded film comprising a thermoplastic polymer in admixture with up to about 30 parts by weight of metal fibers.
Claim 2
Dependent Claim
35 words
The film of claim 1 wherein the metal fibers are cylindrical in shape and from about 2 microns to about 20 microns in diameter and from about 1 millimeter to about 10 millimeters in length.
Claim 3
Dependent Claim
19 words
The film of claim 1 wherein the metal fibers are selected from nickel, chrome, silver, copper, iron, or aluminum.
Claim 4
Dependent Claim
18 words
The film of claim 1 wherein said film exhibits a surface resistivity of about 10¹² ohms/square or less.
Claim 5
Dependent Claim
11 words
The film of claim 1 wherein said film is heat shrinkable.
Claim 6
Dependent Claim
13 words
The film of claim 1 wherein said film is in air cushion form.
Claim 7
Dependent Claim
31 words
In a method for making flexible metallized thermoplastic film, the improvement comprising extruding a film of a thermoplastic polymer in admixture with up to 30 parts by weight of metal fibers.
Claim 8
Dependent Claim
35 words
The method of claim 7 wherein the metal fibers are cylindrical in shape and from about 2 microns to about 20 microns in diameter and from about 1 millimeter to about 10 millimeters in length.
Claim 9
Dependent Claim
19 words
The method of claim 7 wherein the metal fibers are selected from nickel, chrome, silver, copper, iron, or aluminum.
Claim 10
Dependent Claim
18 words
The method of claim 7 wherein said film exhibits a surface resistivity of about 10¹² ohms/square or less.
Claim 11
Dependent Claim
11 words
The method of claim 7 wherein said film is heat shrinkable.
Claim 12
Dependent Claim
17 words
The method of claim 7 further including the step of forming said film into air cushion form.
Claim 13
Dependent Claim
43 words
A packaged static sensitive device protected from electrostatic charges comprising a package of a static sensitive device having conformed thereabout a metallized flexible thermoplastic extruded film of a mixture of thermoplastic polymer and up to about 30 parts by weight of metal fibers.
Claim 14
Independent Claim
49 words
A method for protecting wrapped static sensitive devices from electrostatic charges comprising (a) providing a wrap of a metallized flexible thermoplastic extruded film of a mixture of thermoplastic polymer and up to about 30 parts by weight of metal fibers, and (b) conforming said wrap about a selected device.
References Cited (Backward Citations)
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