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Method and apparatus for making scrolls from exfoliatable materials

A scroll and strip technology, applied in chemical instruments and methods, thin material handling, transportation and packaging, etc., to achieve the effect of high yield and simple process

Inactive Publication Date: 2014-07-30
3M INNOVATIVE PROPERTIES CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Emission of toxic products during processing is also a problem with commercially available graphite foils (e.g., flexible graphite available as GRAFOIL (Lakewood, Ohio)), which can be configured as scrolls by rolling and cutting, but Purity and cost of available materials are issues

Method used

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  • Method and apparatus for making scrolls from exfoliatable materials
  • Method and apparatus for making scrolls from exfoliatable materials
  • Method and apparatus for making scrolls from exfoliatable materials

Examples

Experimental program
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preparation example Construction

[0030] A provided method of making a graphite scroll includes providing a ribbon having a first side and a second side. The tape can have a release coating on one side and an adhesive on the other. In some embodiments, the adhesive may include mechanical fasteners. In other embodiments, the adhesive may include a pressure sensitive adhesive. The tape can be made of any material that can support and adhere to the release coating on one side and the adhesive on the other side. Typically, the tape can be a metal foil, polymer, porous or microporous film, woven or nonwoven web, fabric, paper, elastomeric material or foam.

[0031]Typically, tapes may comprise nonporous polymer substrates such as polyester, polypropylene, polyethylene, polystyrene, polycarbonate, polyvinyl chloride, polyimide, polymethylmethacrylate, cellulose, and poly vinyl chloride. In some embodiments, the substrate can be paper, woven or nonwoven fabric, or foam, such as polyurethane or polystyrene foam. ...

example 1

[0087] A strip of 3M 810 MAGIC tape was secured to a glass plate and TIMCALHSAG 300 graphite exfoliatable particles satin coated on the release side of the tape. Finish sanding for approximately two minutes and place the strip as Figure 4 Released from the glass at an acute angle as shown. During peeling, the thick graphite-coated sheet separates from the release surface and curls inwards to form a Figure 2B Scrolls in . The wraps are a uniform length (3 / 4" or 19mm) determined by the width of the 810 strip.

example 2

[0089] In Example 1 above, the angle of peeling varied from about 90° to about 30°, and the diameter of the resulting scrolls varied from a few millimeters to sub-millimeters.

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Abstract

A method of making scrolls is provided that includes providing a tape having a first side and a second side wherein the first side of the tape is has an adhesive disposed thereon and the second side of the tape has a release coating disposed thereon; affixing the adhesive to a solid surface; buff-coating exfoliatable particles on the release side of the tape to form a coating; and peeling the tape from the solid surface at an angle. The coating separates from the release side of the tape and curls inwards to form scrolls. The scrolls can include graphite. Also provided is a continuous method of making scrolls and an apparatus.

Description

technical field [0001] The present disclosure relates to scrolls made of exfoliatable material, methods of making the same, and conformable thermal pads made therefrom. Background technique [0002] Graphite is a very important material due to its distinctive two-dimensional anisotropic properties. It is chemically inert, electrically and thermally conductive. Graphite foils are well known in the art. Typically, graphite foil is made in several steps. Graphite particles are first added together with acidic material (e.g., concentrated HNO3 and H2SO4 acids) and the resulting sludge is heated very rapidly to high temperatures to expand the particles; the expanded graphite phase (also known as "graphite worms") is then Flatten to form foil. The resulting foil is larger, flexible and chemical resistant; however, the minimum thickness of commercial foil is around 5 mils (75 microns). Commercial foils may contain traces of chlorine and sulfur remaining from process steps, whi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01B31/04C01G39/06
CPCC01G39/06C01B32/20C01B32/205Y10T156/1105Y10T156/1195Y10T428/2918
Inventor R·迪维加尔皮蒂亚T·J·E·克拉科
Owner 3M INNOVATIVE PROPERTIES CO