Method for producing thin carbon fiber nonwovens by a horizontal splitting process

Patent metadata

Field	Value
Publication number	US-11208745-B2
Application number	US-201815859879-A
Country	US
Kind code	B2
Filing date	Jan 2, 2018
Priority date	Jul 2, 2015
Publication date	Dec 28, 2021
Grant date	Dec 28, 2021

Abstract

A method for horizontally splitting rolled-up web material in the sample thickness. A carbon fiber nonwoven is moved in relation to a knife structure in order to split off a layer or successively several layers from a roll web. The one layer or several layers are continuously removed in the form of a roll from the carbon fiber nonwoven after the splitting process.

First claim

The invention claimed is:

1. A method of insulating a high temperature treatment zone, the method comprising:
producing a layer made of carbon fiber non-woven fabric, the step of producing the layer including:
providing a starting material being a carbon fiber non-woven fabric;
subjecting the starting material to a horizontal splitting process in a sample thickness, by moving the carbon fiber non-woven fabric relative to a blade construction and separating one layer or a plurality of layers consecutively from the carbon fiber non-woven fabric; and
continuously removing the one layer or the plurality of layers from the carbon fiber non-woven fabric following the splitting process; and

insulating the high temperature treatment zone with the one layer or the plurality of layers forming a high-temperature insulating material.

2. The method according to claim 1 , wherein a thickness of the carbon fiber non-woven fabric to be split is 3 mm to 50 mm.

3. The method according to claim 1 , wherein a thickness of a separated layer is at least 0.2 mm.

4. The method according to claim 1 , wherein said carbon fiber non-woven fabric is based on a material selected from the group consisting of viscose, PAN, pitch and lignin.

5. The method according to claim 1 , wherein the blade construction is selected from the group consisting of milling cutter cutting tools, band knives, double band knives having two adjacent single band knives, each of which is sharpened on one side, and rigid, ruler-shaped splitting knives having an oscillating drive.

6. The method according to claim 1 , which comprises separating and removing the one or more layers simultaneously and with constant tensile force.

Assignees

• Sgl Carbon Se

Inventors

• Woehner Stefan
• Schneider Dirk
• Steinroetter Michael

Classifications

• B26D3/28

  Splitting layers from work; Mutually separating layers by cutting (B26D3/30 takes precedence; Recovery of plastics or other constituents of waste material containing plastics B29B17/00) · CPC title

• D04H1/4242 Primary

  Carbon fibres · CPC title

• B26D1/025 Primary

  for thin material, e.g. for sheets, strips or the like · CPC title

• B26D3/30

  Halving devices, e.g. for halving buns · CPC title

• D06H7/00 Primary

  Apparatus or processes for cutting, or otherwise severing, specially adapted for the cutting, or otherwise severing, of textile materials {(web delivery apparatus incorporating cutting devices B65H35/0006)} · CPC title