SU647384A1 - Filtering cardboard - Google Patents

Description

(54) FILTER CARDBOARD

dbro6rti; yella kshozy produce roll. Hemönsieri ovine cellulose is loaded into a roll with water and dissolved to a fiber state, until the bundles of unseparated aoloconol concentration of 4-5% disappear.

Cotton pulp is also ground in the grinding roll at a concentration center of at least 1.0% to 18 NIR. The preparation of the positioning is carried out in a mixer of the L eTo apparatus, where these components are loaded, taken at a different percentage ratio. The paperboard samples were pressed on a two-shaft press. The moisture content of the cardboard samples after pressing is made with a water dispersion of a latex of the brand VHVD-65 in the amount of 3-5% of the weight of the absolute dry material. Such a pvc treatment with an aqueous dispersion of latex makes it possible to obtain a cardboard of high mechanical strength in the wet state, to exclude lint from the filtering process and, consequently, to improve the filtering properties of cardboard and the quality of filter media.

We made samples of the proposed filter material of the following composition, wt%:

1 23 4

Chrysotile asbestos Cotton cellulose non-polymerized viscose pulp

The results of comparative tests of manufactured samples of the proposed filtering material and limestone indicate that the proposed material has a high mechanical strength both in the dry and in the wet state (see tab ;;

KTF-1 according to GOST

 Developed a production unit of the proposed cardboard and test laboratories in the All-Union Scientific Research Institute of the Brewery and Non-Alcoholic Industrial Industry (VNIIPBP} and at the Zaporozhye Brewery. The tests showed good operational qualities of the carton. lightening ...,,

The introduction of the proposal into production will not require the modernization of the old or the acquisition of new equipment. . :

Claims (1)

Invention Formula Filter cardboard, mainly for beer filtration, made from cardboard-base, containing wood 64738 spring cellulose, cotton cellulose and hrioothyl asbestos, and polymer coating, in order to increase the mechanical strength of the cardboard while maintaining high filtering rates, cardboard -bottom as wood5 pulp contains non-mersized viscose pulp with the following ratio of components, air-mass.%: 4b Non-meso-sterilized viscose pulp 55-70 Cotton pulp 15-25 Chrysotile asbestos 15-20 Sources of information received note in the examination 1. GOST 12290-66 cardboard for wine filtration. , 2, TU 81-04-426-76 Cardboard filter-. Rough with surface treatment.