NO130694B - - Google Patents
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- Publication number
- NO130694B NO130694B NO00149506A NO14950663A NO130694B NO 130694 B NO130694 B NO 130694B NO 00149506 A NO00149506 A NO 00149506A NO 14950663 A NO14950663 A NO 14950663A NO 130694 B NO130694 B NO 130694B
- Authority
- NO
- Norway
- Prior art keywords
- emulsion
- paraffin wax
- melting point
- fibers
- paraffin
- Prior art date
Links
- 239000012188 paraffin wax Substances 0.000 claims description 29
- 239000000839 emulsion Substances 0.000 claims description 22
- 239000000835 fiber Substances 0.000 claims description 20
- 238000002844 melting Methods 0.000 claims description 15
- 230000008018 melting Effects 0.000 claims description 15
- 238000000034 method Methods 0.000 claims description 9
- 238000003756 stirring Methods 0.000 claims description 9
- 239000000725 suspension Substances 0.000 claims description 9
- 125000002091 cationic group Chemical group 0.000 claims description 7
- 239000003995 emulsifying agent Substances 0.000 claims description 5
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000001556 precipitation Methods 0.000 claims description 5
- 239000000126 substance Substances 0.000 claims description 4
- 125000000217 alkyl group Chemical group 0.000 claims description 3
- -1 amine acetate Chemical class 0.000 claims description 3
- 238000011065 in-situ storage Methods 0.000 claims description 3
- 229920005989 resin Polymers 0.000 claims description 2
- 239000011347 resin Substances 0.000 claims description 2
- 235000010855 food raising agent Nutrition 0.000 claims 1
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 11
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 229960000583 acetic acid Drugs 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 3
- 239000001993 wax Substances 0.000 description 3
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 150000001412 amines Chemical class 0.000 description 2
- 238000004945 emulsification Methods 0.000 description 2
- 229910021653 sulphate ion Inorganic materials 0.000 description 2
- QTBSBXVTEAMEQO-UHFFFAOYSA-M Acetate Chemical compound CC([O-])=O QTBSBXVTEAMEQO-UHFFFAOYSA-M 0.000 description 1
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 229920000877 Melamine resin Polymers 0.000 description 1
- 229920001131 Pulp (paper) Polymers 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- 239000012670 alkaline solution Substances 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 239000002657 fibrous material Substances 0.000 description 1
- 239000012362 glacial acetic acid Substances 0.000 description 1
- 239000005457 ice water Substances 0.000 description 1
- 230000014759 maintenance of location Effects 0.000 description 1
- 239000000155 melt Substances 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000035939 shock Effects 0.000 description 1
- 239000007858 starting material Substances 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
- D21F3/0281—Wet presses in combination with a dryer roll
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
- D21F3/04—Arrangements thereof
Landscapes
- Paper (AREA)
- Treatments For Attaching Organic Compounds To Fibrous Goods (AREA)
Description
Fremgangsmåte ved utfelling av parafiirvoks på fiberstoffer. Procedure for the deposition of paraffin wax on fiber materials.
Denne oppfinnelse vedrører en fremgangsmåte ved utfelling av parafinvoks på fiberstoffer, såsom papirfibre, ved hjelp av en kationisk harpiks, idet der til en surgjort suspensjon av fiberstoffet tilsettes en emulsjon av parafinvoks. Fremgangsmåten er særlig anvendelig for fremstilling av vokset papir. This invention relates to a method for the precipitation of paraffin wax on fibrous substances, such as paper fibres, by means of a cationic resin, whereby an emulsion of paraffin wax is added to an acidified suspension of the fibrous substance. The method is particularly applicable for the production of waxed paper.
Det er tidligere kjent å innføre parafinvoks i papir ved å tilsette en parafinemulsjon til selve papirmassen. Man har da enten felt ut en anionaktiv emulsjon med en flerverdig elektrolytt eller syre eller også ladet om de negativt ladede pa-papirfibre med f. eks. melaminformalde-hydharpiks efter den av Bardac patenterte metode og derved fått en utfelling av parafin på fibrene. I henhold til svensk pa-tent 127 464 er det kjent å tilsette parafinvoks til en suspensjon av fibre i vann, som opvarmes til over voksets smeltepunkt, så dette smelter. Når vokset er helt smeltet og blandet med fibrene, stabiliseres vokset på fibrene ved tilsetning av et kationaktivt, overflateaktivt stoff. Denne fremgangsmåte er imidlertid meget innviklet, og for-målet med oppfinnelsen er å forenkle, hvil-ket i henhold til oppfinnelsen oppnås ved at fibersuspensjonen anvendes uten særskilt opvarming og med fibrene i den naturlige negativt ladede tilstand, og at parafinvoksemulsjonen er fremstilt ved at parafinvokset oppvarmes over smeltepunktet, hensiktsmessig 20° over smeltepunktet, It was previously known to introduce paraffin wax into paper by adding a paraffin emulsion to the paper pulp itself. One has then either precipitated an anion-active emulsion with a polyvalent electrolyte or acid or also recharged the negatively charged PA paper fibers with e.g. melamine-formaldehyde resin according to the method patented by Bardac, thereby obtaining a precipitation of paraffin on the fibres. According to Swedish patent 127 464, it is known to add paraffin wax to a suspension of fibers in water, which is heated to above the melting point of the wax, so that it melts. When the wax is completely melted and mixed with the fibers, the wax is stabilized on the fibers by the addition of a cation-active surfactant. However, this method is very complicated, and the purpose of the invention is to simplify, which according to the invention is achieved by using the fiber suspension without special heating and with the fibers in the natural negatively charged state, and that the paraffin wax emulsion is produced by the paraffin wax heated above the melting point, preferably 20° above the melting point,
hvorefter et kationaktivt emulgeringsmid- after which a cationic emulsifier
del bestående av et primært fettaminacetat inneholdende en alkylgruppe fremstilles in situ og emulsjonen under omrøring avkjø-les til romtemperatur, idet den i området for smeltepunktet, fortrinnsvis 2—3° C part consisting of a primary fatty amine acetate containing an alkyl group is prepared in situ and the emulsion, while stirring, is cooled to room temperature, being in the region of the melting point, preferably 2-3° C
over smeltepunktet, under langsom om-røring i det vesentlige momentant berøves en varmemengde som tilsvarer parafinvoksets smeltevarme, hvilken derved stabiliserte parafinemulsjon tilsettes fibersuspensjonen, hvorved de negativt ladede fibre bringes til å trekke til seg det kationaktive emulgeringsmiddel så emulsjonen blir instabil og parafinvokset felles ut på fibrene. above the melting point, during slow stirring, an amount of heat corresponding to the melting heat of the paraffin wax is essentially instantaneously deprived, which thereby stabilized paraffin emulsion is added to the fiber suspension, whereby the negatively charged fibers are caused to attract the cationic emulsifier so that the emulsion becomes unstable and the paraffin wax falls out on the fibers.
Et utførelseseksempel på oppfinnelsen skal forklares ved fremstilling av parafi-nert papir. Som utgangsmateriale anvendes en suspensjon av ubleket sulfatmasse i vann i en konsentrasjon av ca. 3 pst. ved normal fabrikasjonstemperatur, således uten særskilt oppvarming. Da en kationaktiv emulsjon ikke er stabil i alkalisk oppløsning, og for å oppnå en jevn forde-ling av den utspedde emulsjon, surgjøres sulfatmassesuspensj onen med eddiksyre til en pH-verdi hensiktsmessig mellom 4,5 og 5,5. Deretter tilsettes den kationaktive parafinemulsjon i 10 pst.'s konsentrasjon under omrøring. An embodiment of the invention will be explained in the production of paraffined paper. As starting material, a suspension of unbleached sulphate mass in water is used in a concentration of approx. 3 percent at normal manufacturing temperature, thus without special heating. As a cationically active emulsion is not stable in alkaline solution, and in order to achieve an even distribution of the diluted emulsion, the sulphate mass suspension is acidified with acetic acid to a pH value suitably between 4.5 and 5.5. The cationic paraffin emulsion is then added in a concentration of 10% while stirring.
Fremstillingen av den kationaktive parafinemulsjon skjer på følgende måte. Som emulgeringsmiddel anvendes et fettaminacetat som fremstilles in situ under emul-geringen. The preparation of the cationic paraffin emulsion takes place in the following way. A fatty amine acetate is used as an emulsifier, which is produced in situ during the emulsification.
Det parafin som skal emulgeres, smel-tes først sammen med fettaminet, bestående av en alkylgruppe og en aminogruppe, og temperaturen holdes ca. 20° over smeltepunktet. Samtidig oppvarmes vann i pas-sende mengde samrrtøn med en ekvivalent mengde eddiksyre i form av iseddik til sam-me temperatur som parafinvokset. Det varme vann ihelles derefter sakte i det smeltede parafinvoks under meget kraftig omrøring, hvorved fettaminet reagerer med eddiksyren til acetat og emulgerings-forløpet innledes og fortsettes til emulsjonen er gått over fra vann i olje (V/O) til olje i vann (Q/V), hvorefter den raske om-røring avsluttes og erstattes med langsom omrøring, hvorunder resten av det varme vann ihelles relativt hurtig. The paraffin to be emulsified is first melted together with the fatty amine, consisting of an alkyl group and an amino group, and the temperature is kept at approx. 20° above the melting point. At the same time, water is heated in an appropriate amount of copper with an equivalent amount of acetic acid in the form of glacial acetic acid to the same temperature as the paraffin wax. The hot water is then slowly poured into the melted paraffin wax under very vigorous stirring, whereby the fatty amine reacts with the acetic acid to form acetate and the emulsification process is initiated and continued until the emulsion has changed from water in oil (W/O) to oil in water (Q/ V), after which the fast stirring ends and is replaced by slow stirring, during which the rest of the hot water is poured in relatively quickly.
Den dannede emulsjon avkjøles derefter til omtrent 2—3° C over parafinvoksets smeltepunkt, hvorefter en kalorime-trisk beregnet mengde vann av omtrent 0° C, eksempelvis i isvann, ihelles for sjokk-artet å senke temperaturen under parafinvoksets smeltepunkt, dvs. først og fremst bortføre en varmemengde tilsvarende parafinvoksets smeltevarme. Derefter fortsettes avkjølingen til romtemperatur under fortsatt langsom omrøring. Det er derved oppnådd en stabil kationaktiv emulsjon av typen O/V med jevn partikkel-størrelse. The formed emulsion is then cooled to approximately 2-3° C above the paraffin wax's melting point, after which a calorimetrically calculated amount of water of approximately 0° C, for example in ice water, is poured in for the shock type to lower the temperature below the paraffin wax's melting point, i.e. first and primarily remove an amount of heat corresponding to the melting heat of the paraffin wax. The cooling to room temperature is then continued with continued slow stirring. A stable cation-active emulsion of the O/W type with uniform particle size has thereby been achieved.
I stedet for vann av 0° C er det na-turligvis mulig å anvende et annet avkjø-lingsmiddel med tilstrekkelig kapasitet, eksempelvis en platevarmeveksler. Instead of water at 0° C, it is naturally possible to use another cooling agent with sufficient capacity, for example a plate heat exchanger.
Ved prosessen skjer en momentan utfelling av parafinvokset på fibre, hvorefter der dannes ark på vanlig måte. Utfellingen skjer ved at de negativt ladede fibre til-trekker det positive emulgeringsmiddel som finnes i emulsjonen, hvorved emulsjonen blir instabil og felles ut på fibrene. During the process, a momentary precipitation of paraffin wax occurs on fibers, after which sheets are formed in the usual way. Precipitation occurs when the negatively charged fibers attract the positive emulsifier present in the emulsion, whereby the emulsion becomes unstable and falls out onto the fibers.
En fordel ved fremgangsmåten ifølge oppfinnelsen er at man kan oppnå god retensjon på fibre også ved høyt parafin - innhold i forhold til fiberinnholdet og uten særskilt oppvarming. An advantage of the method according to the invention is that good retention of fibers can be achieved even with a high paraffin content in relation to the fiber content and without special heating.
Også andre fibre enn cellulosefibre kan Fibers other than cellulose fibers can also
behandles ifølge oppfinnelsen. is treated according to the invention.
Claims (1)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US21458962A | 1962-08-03 | 1962-08-03 |
Publications (2)
Publication Number | Publication Date |
---|---|
NO130694B true NO130694B (en) | 1974-10-14 |
NO130694C NO130694C (en) | 1975-01-22 |
Family
ID=22799666
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
NO149506A NO130694C (en) | 1962-08-03 | 1963-07-23 |
Country Status (5)
Country | Link |
---|---|
DE (1) | DE1293564B (en) |
FI (1) | FI47797C (en) |
GB (1) | GB1050821A (en) |
NO (1) | NO130694C (en) |
SE (1) | SE316974B (en) |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2024008405A2 (en) * | 2022-07-05 | 2024-01-11 | Voith Patent Gmbh | Machine and method |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE343026C (en) * | ||||
US1369335A (en) * | 1920-03-04 | 1921-02-22 | Willard J Goodfellow | Press-roll set |
US1938444A (en) * | 1932-06-29 | 1933-12-05 | Rice Barton & Fales Inc | Press roll |
DE855204C (en) * | 1944-01-04 | 1952-11-10 | Voith Gmbh J M | Self-acceptance paper machine |
DE1067679B (en) * | 1955-05-09 | 1959-10-22 | Doerries A G O | Self-acceptance paper machine for the production of thin papers, cellulose wadding or the like. |
GB847319A (en) * | 1957-07-17 | 1960-09-07 | Stiftelsen Pappersbrukens Fors | De-watering of a wet or moist travelling, self supporting web of paper or a web of other absorbent material |
FR1280824A (en) * | 1960-12-13 | 1962-01-08 | Beloit Iron Works | Presser assembly for continuous paper machine |
-
1963
- 1963-07-23 NO NO149506A patent/NO130694C/no unknown
- 1963-07-31 GB GB3043263A patent/GB1050821A/en not_active Expired
- 1963-08-02 FI FI631507A patent/FI47797C/en active
- 1963-08-02 DE DEB72976A patent/DE1293564B/en active Pending
- 1963-08-02 SE SE8580/63A patent/SE316974B/xx unknown
Also Published As
Publication number | Publication date |
---|---|
GB1050821A (en) | 1966-12-07 |
FI47797B (en) | 1973-11-30 |
DE1293564B (en) | 1969-04-24 |
FI47797C (en) | 1974-03-11 |
NO130694C (en) | 1975-01-22 |
SE316974B (en) | 1969-11-03 |
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