US1531319A - Process for making paper half stock - Google Patents
Process for making paper half stock Download PDFInfo
- Publication number
- US1531319A US1531319A US1531319DA US1531319A US 1531319 A US1531319 A US 1531319A US 1531319D A US1531319D A US 1531319DA US 1531319 A US1531319 A US 1531319A
- Authority
- US
- United States
- Prior art keywords
- straw
- making paper
- paper
- half stock
- paper half
- 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
- 238000000034 method Methods 0.000 title description 10
- 239000010902 straw Substances 0.000 description 28
- 239000000463 material Substances 0.000 description 20
- 235000004431 Linum usitatissimum Nutrition 0.000 description 16
- UIIMBOGNXHQVGW-UHFFFAOYSA-M NaHCO3 Chemical compound [Na+].OC([O-])=O UIIMBOGNXHQVGW-UHFFFAOYSA-M 0.000 description 16
- 241000208202 Linaceae Species 0.000 description 14
- WQYVRQLZKVEZGA-UHFFFAOYSA-N Hypochlorite Chemical class Cl[O-] WQYVRQLZKVEZGA-UHFFFAOYSA-N 0.000 description 12
- 239000000243 solution Substances 0.000 description 12
- 238000004140 cleaning Methods 0.000 description 8
- 239000000835 fiber Substances 0.000 description 8
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 8
- 235000017557 sodium bicarbonate Nutrition 0.000 description 8
- ZKQDCIXGCQPQNV-UHFFFAOYSA-N Calcium hypochlorite Chemical compound [Ca+2].Cl[O-].Cl[O-] ZKQDCIXGCQPQNV-UHFFFAOYSA-N 0.000 description 4
- 239000001913 cellulose Substances 0.000 description 4
- 229920002678 cellulose Polymers 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 2
- 240000006240 Linum usitatissimum Species 0.000 description 2
- 239000007844 bleaching agent Substances 0.000 description 2
- OYPRJOBELJOOCE-UHFFFAOYSA-N calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 2
- 239000011575 calcium Substances 0.000 description 2
- 229910052791 calcium Inorganic materials 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 235000019504 cigarettes Nutrition 0.000 description 2
- 238000010410 dusting Methods 0.000 description 2
- 235000004426 flaxseed Nutrition 0.000 description 2
- 239000002244 precipitate Substances 0.000 description 2
- 239000003638 reducing agent Substances 0.000 description 2
- 239000012047 saturated solution Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21C—PRODUCTION OF CELLULOSE BY REMOVING NON-CELLULOSE SUBSTANCES FROM CELLULOSE-CONTAINING MATERIALS; REGENERATION OF PULPING LIQUORS; APPARATUS THEREFOR
- D21C9/00—After-treatment of cellulose pulp, e.g. of wood pulp, or cotton linters ; Treatment of dilute or dewatered pulp or process improvement taking place after obtaining the raw cellulosic material and not provided for elsewhere
- D21C9/10—Bleaching ; Apparatus therefor
- D21C9/12—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds
- D21C9/14—Bleaching ; Apparatus therefor with halogens or halogen-containing compounds with ClO2 or chlorites
Definitions
- M. invention relates particularly to the r uction of-a "aper half stock suitable or the making of high grade white papers, such as cigarette paper, banknote paper, con. It is required thatthese papers shall be of absolute uniformity of texture, of a requisite degree of toughness, free from unreduced. woody fibers and specks, which fibers and specks not only spoil the appearance of the pa er but break its continuity, making it wea and useless for the purposes intended. Such papers have hitherto been made from linen stock,
- Flax straw and other straws contain ligneous matter as well as: fibrous matters, and these two classes of matter have very different resisting powers to the action of agents adapted toreduce or remove the woody material.
- Flax is peculiarly characterized in that it contains not only the ligneous cellulose but also pecto cellulose.
- the fibrous portion is. very much" less resistent to a reducing agent than isthe li eous portion;
- the ligneous portion of ax straw knownas shive is one of the most resistent bodies in this respect that is known. All prior attempts, therefore, to use flax straw as'a material for paper making have resulted in the presence in the paper of specks of foreign matter and un- Application filed January 24, 1920. .Serial No. 353,824.
- suflicient quantity of hypochlorite is introduced into the water to bring the solution to a density of 4 to 6 Twaddle, although this may be varied to suit'the' requirements of the material to be treated.
- the calclum hypochlorite solution is allowed to settle and drained ofl. lution sodium bicarbonate in excess. I prefthe fiber without injuring the strength or I then introduce into this soerably make a saturated solution of sodium bicarbonate and introduce the same into the calcium hypochlorite solution.
- By adding an excess of the sodium bicarbonate over the quantitv required to completely precipitate or the like hoilin g out the straw thus partmlly cleaned, and then subjecting the straw to the action. of a liquid resulting from the introduction into a sufliciently concentrated 5 solution of calcium hypochloriteof an ex cess of sodium bicarbonate.
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Wood Science & Technology (AREA)
- Paper (AREA)
Description
Patented Mar. 31,1925.
' UNITED STATES.
I 1,531,319 PATENT OFFICE.
nma'rmn s. summnns, or roar HURON, MICHIGAN.
PROCESS FOR. MAKING PAPER HALF STOCK.
No Drawing.
To all whmriit may comem:
Be it known that I, BERTRAND S. S M- ms,'a citizenof the United States, residing denser paper, and the like.
at Port Huron, county of St. Clair, and State of Michigan, have invented a new and useful Process for Producing Paper Half Stock, of which the following is. a specifica-.
tion.
M. inventionrelates particularly to the r uction of-a "aper half stock suitable or the making of high grade white papers, such as cigarette paper, banknote paper, con. It is required thatthese papers shall be of absolute uniformity of texture, of a requisite degree of toughness, free from unreduced. woody fibers and specks, which fibers and specks not only spoil the appearance of the pa er but break its continuity, making it wea and useless for the purposes intended. Such papers have hitherto been made from linen stock,
usually linen rags, and high I grade mill recent waste. The supply of these materials in ears has been much less than the deman causing a great, shortage in these pa ers and greatly increased price therefor.
ere is, however, available a large quantity of flax straw resulting from the linseed and flax fiber industries.- Many attempts have been made in the past to convert this material into paper half stock having the required characteristics. Owing to the physical and chemical peculiarities of flax straw, however, such attempts have not been successful, the problem being further com pl-icated by the presence in such straw of foreign material, such as weeds.
It is wellv known that this flax straw and other straws contain ligneous matter as well as: fibrous matters, and these two classes of matter have very different resisting powers to the action of agents adapted toreduce or remove the woody material. Flax is peculiarly characterized in that it contains not only the ligneous cellulose but also pecto cellulose. The fibrous portion of flaxcontains also cutooellulose with strong waxy characteristics. v The fibrous portion is. very much" less resistent to a reducing agent than isthe li eous portion; The ligneous portion of ax straw knownas shive is one of the most resistent bodies in this respect that is known. All prior attempts, therefore, to use flax straw as'a material for paper making have resulted in the presence in the paper of specks of foreign matter and un- Application filed January 24, 1920. .Serial No. 353,824.
reduced shive, resulting in a paper of inferlor quality both as to appearance and strength and useless for the purposes to which high grade linen papers areapplied. To my knowledge paperswhich have hitherto been produced from these straws, while sometimes of good color so far as the fibrous portion is concerned, have contained a large 'element of unreduced matter, which weakattempt to reduce ens the paper, while an" this matter has resulted in the destruction of the fibrous matter, making it impossible to make a high class sheet. To my knowledge, therefore, althou h vast supplies of material have been avai able, it has hitherto been impossible. to use them.
In carrying out my invention, I treat the.
straws having the characteristics above described by firstremoving therefrom such of the ligneous material as may be done by the usual breaking and dusting process. partially cleaned material contains a considerable portion of the shive together sometimes with a quantity of weedy material. It
I has been found impracticable toremove all integrity of the fibrous portion. For this purpose I employ a very strong solution of calcium hypochlorite,. commonly known as a bleaching powder. This hypochlorite is dissolved in water and allowed to settle. A
suflicient quantity of hypochlorite is introduced into the water to bring the solution to a density of 4 to 6 Twaddle, although this may be varied to suit'the' requirements of the material to be treated. The calclum hypochlorite solution is allowed to settle and drained ofl. lution sodium bicarbonate in excess. I prefthe fiber without injuring the strength or I then introduce into this soerably make a saturated solution of sodium bicarbonate and introduce the same into the calcium hypochlorite solution. By adding an excess of the sodium bicarbonate over the quantitv required to completely precipitate or the like hoilin g out the straw thus partmlly cleaned, and then subjecting the straw to the action. of a liquid resulting from the introduction into a sufliciently concentrated 5 solution of calcium hypochloriteof an ex cess of sodium bicarbonate.
8. The herein described process, which consists in mechanically cleaning flax bicerbonate.
straw,'or the like, boilin out the 'straw thus partially cleaned, and hen sub'ecting the straw. to the action of a liquid. resulting from the introduction into a suflieiently concentrated' solution of ch1orinous matter in an active condition of an excess of BERTRANDV s. summns.
alkaline-
Publications (1)
Publication Number | Publication Date |
---|---|
US1531319A true US1531319A (en) | 1925-03-31 |
Family
ID=3408172
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US1531319D Expired - Lifetime US1531319A (en) | Process for making paper half stock |
Country Status (1)
Country | Link |
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US (1) | US1531319A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE913082C (en) * | 1939-01-25 | 1954-06-08 | Schoeller & Hoesch | Capacitor paper, the raw material of which has largely been freed from ash components, and process for its production |
-
0
- US US1531319D patent/US1531319A/en not_active Expired - Lifetime
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE913082C (en) * | 1939-01-25 | 1954-06-08 | Schoeller & Hoesch | Capacitor paper, the raw material of which has largely been freed from ash components, and process for its production |
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