Method for producing wet-running friction paper
AssigneeSchaeffler Technologies AG & Co. KG
InventorsStefan Steinmetz, Gregor Mattern
Life of this patent
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Abstract
A method is for producing a wet-running friction paper, at least containing a fiber fraction consisting of at least one type of fiber, a fraction of at least one filler, and a fraction of a binder based on phenol resin. The fiber fraction, the filler fraction and the binder dissolved as a phenolate solution are processed together in a paper production process to form a pulp, and the binder is subsequently precipitated by means of a precipitating agent, preferably diluted sulfuric acid, and the pulp applied to a long screen is dried and cured while the temperature is raised.
Claims18
A method for producing a wet-running friction paper comprising:
- at least one fiber fraction consisting of at least one type of fiber,
- a fraction of at least one filler, and
- a fraction of a binder based on phenol resin, the method comprising:
- processing the fiber fraction, the filler fraction and the binder dissolved as a phenolate solution together in a paper production process to form a pulp;
- subsequently precipitating the binder by a precipitating agent;
- drying the pulp on a long screen and curing the pulp while a temperature of the pulp is raised,
- wherein particles of the binder are precipitated with a particle size between 200 and 1600 nm as a result of the precipitating of the binder.
Dependencies are inferred from the claim text.