Rigid sheet and method for producing the same

Provided is a hard sheet including a non-woven fabric of ultrafine fibers and elastic polymer added into the non-woven fabric. JIS-D hardness of the sheet is 45 degrees or more. R% thereof calculated by R(%) = (D hardness maximum - D hardness minimum) / D hardness average × 100 is 0 to 20%, when a s...

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Bibliographic Details
Main Authors MEGURO, MASASI, TAKAOKA, NOBUO, HAYASHI, KOICHI, NAGAYAMA, REI
Format Patent
LanguageChinese
English
Published 11.12.2017
Subjects
BASIC ELECTRIC ELEMENTS
DRESSING OR CONDITIONING OF ABRADING SURFACES
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
GRINDING
MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING
PERFORMING OPERATIONS
POLISHING
SEMICONDUCTOR DEVICES
TRANSPORTING
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Summary:Provided is a hard sheet including a non-woven fabric of ultrafine fibers and elastic polymer added into the non-woven fabric. JIS-D hardness of the sheet is 45 degrees or more. R% thereof calculated by R(%) = (D hardness maximum - D hardness minimum) / D hardness average × 100 is 0 to 20%, when a sectional surface of the sheet extending in the thickness direction thereof is evenly divided into three parts corresponding to a first outer layer, an intermediate layer, and a second outer layer in order from any one surface side of the sheet; JIS-D hardness measurements are made at six points being three arbitrary points each on the first outer layer and on the intermediate layer; and then the JIS-D hardnesses obtained are used for the calculation. In the sheet, the total content of ions capable of changing the pH of water is 400 µg/cm 3 or less.
Bibliography:Application Number: TW20143104189