US2315675A - Sizing of paper - Google Patents
Sizing of paper Download PDFInfo
- Publication number
- US2315675A US2315675A US352741A US35274140A US2315675A US 2315675 A US2315675 A US 2315675A US 352741 A US352741 A US 352741A US 35274140 A US35274140 A US 35274140A US 2315675 A US2315675 A US 2315675A
- Authority
- US
- United States
- Prior art keywords
- sizing
- pulp
- rosin
- paper
- salt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/20—Macromolecular organic compounds
- D21H17/33—Synthetic macromolecular compounds
- D21H17/34—Synthetic macromolecular compounds obtained by reactions only involving carbon-to-carbon unsaturated bonds
- D21H17/37—Polymers of unsaturated acids or derivatives thereof, e.g. polyacrylates
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H17/00—Non-fibrous material added to the pulp, characterised by its constitution; Paper-impregnating material characterised by its constitution
- D21H17/60—Waxes
Definitions
- This invention relates to an improvement in the sizing of paper. It relates to a method of sizing paper with resin or wax whereby the amount of resin or wax can be considerably reduced without affecting the sizing effect.
- the water-soluble salt of polymethacryllc acid is added to the pulp in the beater before or after the addition oi. the sizing material.
- the sizing material for example a rosin soap solution.
- the polymethacrylate may also be mixed directly with the sizing material before this is added to the pulp. After the size and polymethacrylate are thoroughly distributed in the pulp.
- a solution of an aluminum salt is added as is customary in order to precipitate the rosin in the form of its aluminum salt.
- the aluminum polymethacrylate is also insoluble and precipitates at the same time but this salt alone has no sizing action.
- the polymethacrylate can be used to replace many times its own weight of rosin. In conjunction with the rosin it increases the sizing effect thereof to such an extent that the amount of rosin necessary to give the desired effect can be reduced to about one-half of that required when no poly methacryiate is present.
- rosin dispersed in 150 parts of water 1.5 parts by weight of rosin dispersed in 150 parts of water is added to 2500 parts of a 4% cellulose pulp in a beater and thoroughly beaten. Then 5 parts of a 10% solution of sodium polymethacrylate is added and thoroughly mixed in whereupon sumcient aluminum sulfate solution is added to precipitate the rosin and polymethacrylate as aluminum salts. Paper made from pulp so treated corresponds in sizing effect to one made with about three percent. of rosin.
- the sodium salt of a copolymer made from parts of methacrylic acid and 35 parts of methyl methacrylate may be employed.
- Other copolymers in which methacrylic acid predominates may also be employed in the form of their soluble salts.
- the salts of polyacrylic acid do not have the same effect except to a very limited extent.
- a paper made from cellulose pulp In the process of beater-sizing with resins and waxes, a paper made from cellulose pulp. the improvement which comprises adding to the pulp, prior to the formation of a web therefrom, approximately 0.5% of a water-soluble salt of polymethacrylic acid, said acid being calculated on the weight oi the cellulose content of said pulp.
Description
Patented Apr. 6, 1943 srzmo or PAPER Ernst Trommsdorff, Darmstadt, Germany, as-
signor to Riihm a Haas Company, Philadelphia,
No Drawing. Application August 15, i940, Serial No. 352,741. In Germany August 25, 1939 3 Claims.
This invention relates to an improvement in the sizing of paper. It relates to a method of sizing paper with resin or wax whereby the amount of resin or wax can be considerably reduced without affecting the sizing effect.
It has been found that the sizing effect of resin or wax can be greatly increased by adding to the sizing material an alkali metal or ammonium salt of polymethacrylic acid or of a copolymer of methacrylic acid and another polymerizable material, In the latter case the proportion of methacrylic acid in the polymer must be sufficient to render the alkali metal or ammonium salt soluble in water.
In carrying out the invention the water-soluble salt of polymethacryllc acid is added to the pulp in the beater before or after the addition oi. the sizing material. for example a rosin soap solution. The polymethacrylate may also be mixed directly with the sizing material before this is added to the pulp. After the size and polymethacrylate are thoroughly distributed in the pulp.-
a solution of an aluminum salt is added as is customary in order to precipitate the rosin in the form of its aluminum salt. The aluminum polymethacrylate is also insoluble and precipitates at the same time but this salt alone has no sizing action. In spite of this lack of sizing action the polymethacrylate can be used to replace many times its own weight of rosin. In conjunction with the rosin it increases the sizing effect thereof to such an extent that the amount of rosin necessary to give the desired effect can be reduced to about one-half of that required when no poly methacryiate is present. An addition of 0.3 to 0.5% of the soluble salt of polymethacrylic acid, calculated on the dry solids content of the pulp. is sufficient to replace about 50% of the rosin ordinarily used for sizing. When 0.5% of a salt of polymethacrylic acid, calculated on the cellulose content of the pulp. is employed in conjunction with a rosin size, the mechanical properties of the paper made from the pulp are better than when rosin alone is used.
The invention may be illustrated by the followin: example: I
1.5 parts by weight of rosin dispersed in 150 parts of water is added to 2500 parts of a 4% cellulose pulp in a beater and thoroughly beaten. Then 5 parts of a 10% solution of sodium polymethacrylate is added and thoroughly mixed in whereupon sumcient aluminum sulfate solution is added to precipitate the rosin and polymethacrylate as aluminum salts. Paper made from pulp so treated corresponds in sizing effect to one made with about three percent. of rosin.
In place of the solution of sodium polymethacrylate used in the foregoing example. the sodium salt of a copolymer made from parts of methacrylic acid and 35 parts of methyl methacrylate may be employed. Other copolymers in which methacrylic acid predominates may also be employed in the form of their soluble salts. The salts of polyacrylic acid do not have the same effect except to a very limited extent.
I claim:
1. In the process of beater-sizing with resins and waxes. a paper made from cellulose pulp. the improvement which comprises adding to the pulp. prior to the formation of a web therefrom, about 0.3% to about 0.5% of a water-soluble salt of poiymethacrylic acid, the amount of said salt being calculated on the weight of the cellulose content of said pulp.
3. In the process of beater-sizing with resins and waxes, a paper made from cellulose pulp. the improvement which comprises adding to the pulp, prior to the formation of a web therefrom, approximately 0.5% of a water-soluble salt of polymethacrylic acid, said acid being calculated on the weight oi the cellulose content of said pulp.
ERNST moMMsnoRr'r.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2315675X | 1939-08-25 |
Publications (1)
Publication Number | Publication Date |
---|---|
US2315675A true US2315675A (en) | 1943-04-06 |
Family
ID=7994565
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US352741A Expired - Lifetime US2315675A (en) | 1939-08-25 | 1940-08-15 | Sizing of paper |
Country Status (1)
Country | Link |
---|---|
US (1) | US2315675A (en) |
Cited By (17)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2601671A (en) * | 1946-10-23 | 1952-06-24 | American Cyanamid Co | Resin-impregnated leather board |
US2632699A (en) * | 1950-06-17 | 1953-03-24 | Eastman Kodak Co | Manufacture of high wet strength paper |
US2654671A (en) * | 1948-07-17 | 1953-10-06 | Hercules Powder Co Ltd | Paper product and process for its preparation |
US2658828A (en) * | 1948-09-15 | 1953-11-10 | Chemloch Corp | Process of combining synthetic resins and other materials with cellulose |
US2683087A (en) * | 1948-02-10 | 1954-07-06 | American Cyanamid Co | Absorbent cellulosic products |
US2684300A (en) * | 1948-05-13 | 1954-07-20 | Monsanto Chemicals | Sizing paper and product |
US2713539A (en) * | 1951-02-14 | 1955-07-19 | Eastman Kodak Co | Manufacture of high wet strength paper |
US2721505A (en) * | 1950-12-08 | 1955-10-25 | Statens Skogsind Ab | Process of spray coating a web and heating the coated surface |
US2729560A (en) * | 1953-06-22 | 1956-01-03 | American Cyanamid Co | Wet strength paper containing aminoaliphatic chain polymer resins |
US2765229A (en) * | 1954-02-15 | 1956-10-02 | Rohm & Haas | Methods of producing wet-laid cellulose fibrous products containing synthetic resins |
US2772970A (en) * | 1952-04-04 | 1956-12-04 | Armstrong Cork Co | Method of making fibrous sheet material containing a synthetic rubber binder |
US2778283A (en) * | 1953-05-28 | 1957-01-22 | Phillip S Bettoli | Preparation of coated asbestos-cement products |
US2880090A (en) * | 1956-11-20 | 1959-03-31 | Armstrong Cork Co | Asbestos-backed plastic surface covering |
US3194727A (en) * | 1962-09-24 | 1965-07-13 | Tee Pak Inc | Preparation of hydrolyzed polymer deposited on cellulosic material and the resulting product |
US3395070A (en) * | 1962-09-24 | 1968-07-30 | Tee Pak Inc | Paper product containing cellulose graft polymers |
US3656949A (en) * | 1968-06-10 | 1972-04-18 | Fuji Photo Film Co Ltd | Method of producing an electrophotographic and electrographic recording member |
US5741889A (en) * | 1996-04-29 | 1998-04-21 | International Paper Company | Modified rosin emulsion |
-
1940
- 1940-08-15 US US352741A patent/US2315675A/en not_active Expired - Lifetime
Cited By (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2601671A (en) * | 1946-10-23 | 1952-06-24 | American Cyanamid Co | Resin-impregnated leather board |
US2683087A (en) * | 1948-02-10 | 1954-07-06 | American Cyanamid Co | Absorbent cellulosic products |
US2684300A (en) * | 1948-05-13 | 1954-07-20 | Monsanto Chemicals | Sizing paper and product |
US2654671A (en) * | 1948-07-17 | 1953-10-06 | Hercules Powder Co Ltd | Paper product and process for its preparation |
US2658828A (en) * | 1948-09-15 | 1953-11-10 | Chemloch Corp | Process of combining synthetic resins and other materials with cellulose |
US2632699A (en) * | 1950-06-17 | 1953-03-24 | Eastman Kodak Co | Manufacture of high wet strength paper |
US2721505A (en) * | 1950-12-08 | 1955-10-25 | Statens Skogsind Ab | Process of spray coating a web and heating the coated surface |
US2713539A (en) * | 1951-02-14 | 1955-07-19 | Eastman Kodak Co | Manufacture of high wet strength paper |
US2772970A (en) * | 1952-04-04 | 1956-12-04 | Armstrong Cork Co | Method of making fibrous sheet material containing a synthetic rubber binder |
US2778283A (en) * | 1953-05-28 | 1957-01-22 | Phillip S Bettoli | Preparation of coated asbestos-cement products |
US2729560A (en) * | 1953-06-22 | 1956-01-03 | American Cyanamid Co | Wet strength paper containing aminoaliphatic chain polymer resins |
US2765229A (en) * | 1954-02-15 | 1956-10-02 | Rohm & Haas | Methods of producing wet-laid cellulose fibrous products containing synthetic resins |
US2880090A (en) * | 1956-11-20 | 1959-03-31 | Armstrong Cork Co | Asbestos-backed plastic surface covering |
US3194727A (en) * | 1962-09-24 | 1965-07-13 | Tee Pak Inc | Preparation of hydrolyzed polymer deposited on cellulosic material and the resulting product |
US3395070A (en) * | 1962-09-24 | 1968-07-30 | Tee Pak Inc | Paper product containing cellulose graft polymers |
US3656949A (en) * | 1968-06-10 | 1972-04-18 | Fuji Photo Film Co Ltd | Method of producing an electrophotographic and electrographic recording member |
US5741889A (en) * | 1996-04-29 | 1998-04-21 | International Paper Company | Modified rosin emulsion |
US6048439A (en) * | 1996-04-29 | 2000-04-11 | International Paper Company | Modified rosin emulsion |
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