SU511405A1 - Pulp for the manufacture of wet-proof paper - Google Patents

Description

The invention relates to the production of paper and can be used in the manufacture of water-resistant papers. Known methods for imparting water resistance to paper are based on the introduction of synthetic resins into the pulp mass. However, imparting moisture resistance to paper by such means does not allow one to obtain paper that is poorly deformed with stable moisture resistance. According to Jeresik, the wet strength of paper obtained by injecting urea formaldehyde resin decreases even during its stay in humid air. In addition, the introduction of synthetic resins significantly pollutes wastewater due to incomplete retention of them on the fiber. The retention of the malamine formaldehyde resin (MFI, determined on a UV spectrophotometer for bleached pulp varieties ranges from 28 to 63%. The use of synthetic resins allows you to adjust the moisture content in a very narrow range and does not allow to obtain special properties. The manufacture of modified fiber is known , for example, hydroxyethylated, and fibers, also used individually and containing carboxyl, amide, or cyanoethyl groups. It is desirable to obtain paper with a stable water resistance, since they do not change the nature of the bond in comparison with conventional cellulosic fibers. The aim of the invention is to obtain .g with: - gtabilsk vlchgopoprost. It is possible that the paper pulp contains as ..-) pulp and cellulose a mixture of cellulose with nucleophilic substitutes and and cellulose with electrophilic substituents in the following ratio to: 7chents: modified cellulose with nucleophiles. I substitute 45-5O Dees and% modified cellulose with electrophilic substituents 5О-55 wt.%. As a modified cellulose with nuclides} substituents, it contains: IT is aminoethylcellulose, and as a modified cellulose

with zlzktsy-urani for yestitol and sh1y: upsets oz mono sarbozhsdeldel juloza. Modified ellipses should be from 7 to 11 degrees of level 2-100, Egypt and the degree of subdivision should not be divided; Using HyjinecibiiJib ™ fioro If e, pectrophritic for reattachment of paper, .. was approximately the same,

Ф; у;: к1;:; О7 :: a ;; snye groups of syluloe Bzaigloydstugut zrrotsoss - sutiki papers In ps ™ vu; ss.-sye-1e e buyzgs form medical zsolohozm hm; such connections donaste with the method of IR-spectroscopy k; t according to a ;;; 1Lzs, the intersections of interblock homedine products in DOS,

GUSLOV-ky drying bootlags - traditional nipples., 11C-schcheng paper, does not require a bit of water to give the tenants; the balance of the dobovokr is stable and easy to regulate: -; p: to him: about moisture resistance, low deforch-1 day. Croyle TorOj presence dowh function; on .gpg.nyh groups in paper (due to peaivuiio;: -

but capable groups, not VLAD UZS OF B3C: t i dyeste-ke) do not allow noj y4; iib a whole range of special properties,

Therefore, the quality of substitution and the degree of substitution of these cells can be increased. For example, you can retouch the properties of the paper.

Mechanical and ilkO4HOCTb indicator Vlygogroch-Vlagoyrochv dry soost vostoy5% (time-HOCTbs% of m and swelling (.Pack kg2 tvsHH) bugsak

i p y me r 1. Get wet-strength paper with interlayer and chemical

slika ka os.noze kianur elulose and amino ethyl cellulose.

Cyanuric cellulose with a chlorine content of 2% makes it easier to resist with cyanuric chloride, acganoethylcellulose is obtained by solution of alkylation of ethylenamine,

For the modification, bleached SuluiTiyiyjo cellulose of mark АС-11, prefabrication.ns raamolot ao up to 57 ШР to igkklukrokr., G, is used.

11beam: et: T1m; Adfccyrozanne: cellululo-sb.fj, taken in a 1: 1 ratio. dkspergiruyut at a concentration of 2% and otl vak; g usual stsssobom agsharate Rapid-Kettep. Dried at a temperature of more than SO C for at least 5 ms.

The main orders of the received paper .P | 38stated. in tab. For comparison, in this table, the fiz. Ots of a fiza o-mechanical Kvie item dyiviariina by injection of bleached sulphate pulp prefabricated times up to 57 LIIP. Dall imparting alagoprostpost use melam butformaldehyde resin. 10 hour) Hold Special melamic properties of formaldehyde resin on BOLKNE5%

Qy anurceltiolosis a

Aminoethylcellulose

(1: 1)

Ion exchange

20

gome lexons for t. metal metals (due to rp,

nineteen

2.7

54

12

PRA iyj e p 2. Moisture-absorbing paper with melshu / yuk.nz and chemical bonds. POL, is drunk in laboratory conditions, using ..., .. (myocarboxylic cellulose (containing carboxyl groups of 2.5 %) and amino acid / g. tyulose {containing nitrogen (ie, 8.2%) with corresponding “Oiirei-n; w & g & modernized dellclosis

1; 1. The availability of interfiber bonds is proved by the method of IR spectroscopy: and by analyzing the by-products of the recipe in wastewater, x,

Claims (2)

11 guaranty paper, as in example 1, has an easy-to-use interface. Claim 1, Paper pulp for the manufacture of wet- and 4-strength papers based on modified cellulose, characterized in that, in order to obtain paper with stable moisture resistance. paper pulp contains a mixture of cellulose with nucleophilic substituents and cellulose with electrophilic and substituents in the following ratio of components: modified cellulose with nucleus substitutes; lnmi 45-50 wt.% ;; : identification-P i: family with safe saMGCvure.uiV „,, 2. .Viacc ;. ) about: ,, i, e tl i: h - w ir. and with the fact that, as modfitst; drovi1Ou cellulose with: -; uklps.sf11l; -i.k to be used by the tenants, it contains aggtaret, and cellulose, as well as modifying; -; ue.i.-iio.ioabi with electrophilic substituents - cyanuric cellulose or monocarboxylic cellulose.