A method of manufacturing a separator paper

 

(57) Abstract:

Method for manufacturing separator paper, can be used in the pulp and paper industry, in particular this paper will be used in the electrical industry for chemical current sources with an alkaline electrolyte. Asbestos fibers grind, mix them with latex. Is then formed in the forming area of the paper on its surface, apply the latex in the form of an aerosol in the amount of 4-8% by weight of paper at a concentration of 1-2%. After which the paper is pressed and dried. The technical result is to increase the mechanical strength of the paper without reducing its separation properties. table 1.

The invention relates to the pulp and paper industry, in particular the production of separator paper, which will find application in electrical industry for chemical current sources with an alkaline electrolyte.

The paper used as a separator in concentrated electrolytes, high demands are placed on chemical resistance and mechanical strength, which are mainly determined by the lifetime (resource) of the current source.

In the manufacture of separate the mi components which are chemically and heat resistant asbestos fibers combined with a synthetic, glass, pulp and other fibers.

Known as a separator paper for chemical current sources on and.with. The USSR 628206 manufactured from asbestos and a binder is a phenol-formaldehyde oligomers rezol type. The disadvantage of this paper is the low chemical stability in concentrated alkaline solutions.

Recently in the establishment of modern power sources new generation arose a need for a durable slim tech separator paper with good separation characteristics.

Closest to the technical essence of the present invention is a separator paper, manufactured by the method described in A. with. The USSR 1134652.

In the composition of the paper is to asbestos fiber 90-97%, and butadiene-styrene-nitrile-carboxylate latex 3-10%.

This separator paper is issued by the industry on THE 13-7308001-712-85.

This paper has a high chemical resistance, low electrical resistance and good electrolytically.

However, it does not meet modern requirements for mechanical strength.

Further increasing the strength of securities is iginio separation paper properties (growth of electric resistance and reduce electrolytically), that reduces the service life of the power source.

The purpose of this proposed invention is to provide a separator paper with high mechanical strength without compromising its separation properties.

The problem is solved because, according to the method of manufacturing a separator paper with a basis of asbestos, including the grinding, mixing it with latex, low tide, during which on the surface with a damp cloth paper put the latex in the form of an aerosol concentration of 1-2% in the amount of 4-8% by weight of paper, then the blade is pressed and dried.

The latex particles in the aerosol form of the proposed method point cover the surface with a damp cloth paper, bonding asbestos fibers, resulting in increased durability. Thus the pore structure of paper does not change, resulting in its separation properties satisfy the requirements.

Production samples of separator paper was performed on listonline apparatus LOA-2.

As a feedstock in the manufacture of samples of separator paper used chrysotile obessilennyj asbestos mark AHO-2 on THE other 21-22-3-88 and alkali-resistant nitrile latte is the add.

All variants of the samples on offer and a known method produced from a mass of identical composition:

Asbestos AHO-2 - 90%

Latex SHEDDING-40 - 10%

The required amount of latex asked in a mixer with asbestos suspension for 10-15 seconds before the end of mixing.

The resulting mass is in the form ostatniego apparatus poured samples of separator paper. Then on the wet surface of the sample deposited latex 1-2% concentration in the form of aerosol particles. Then, the samples were extruded on a twin roll press to the same dryness and dried in Electrosila hill at the temperature of the heating surface 130-140oC.

For comparison, we made samples of separator paper and.with. 1134652. Samples of separator paper was tested by standard methods. The test results presented in the table.

As can be seen from the table, the proposed method of manufacture allows to increase the mechanical strength of the separator paper 4,5-6,7 N without changing the parameters of absorption of alkali and electrical resistance of paper.

Increasing the mechanical strength of the paper contributes to the improvement of the efficiency in the manufacture of khimicheskie excludes vorsootdelenie, that increases the reliability of separator paper as separator in the products.

A method of manufacturing a separator paper by grinding asbestos fibers, mixing it with latex, forming, pressing and drying, characterized in that the forming area of the paper on its surface, apply the latex in the form of an aerosol in the amount of 4-8% by weight of paper at a concentration of 1-2%.

 

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FIELD: polymer materials in paper-and-pulp industry.

SUBSTANCE: invention relates to manufacturing cellulose-polymer composites that can be, in particular, used in production paper or cardboard. Method according to invention providing a composition and manufacturing sheet therefrom followed by drying. In the method of invention, aqueous nanodispersion of polyorganosiloxanes is utilized, which can be introduced into composition or can be deposited onto sheet before drying on size press or after drying of sheet to moisture content not less than 12°.

EFFECT: improved waterproofness, increased inflammation temperature, and improved physicochemical characteristics of material.

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