CN105714604B - A kind of method for improving calcium silicates and being filled with paper performance - Google Patents
A kind of method for improving calcium silicates and being filled with paper performance Download PDFInfo
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- CN105714604B CN105714604B CN201610228489.7A CN201610228489A CN105714604B CN 105714604 B CN105714604 B CN 105714604B CN 201610228489 A CN201610228489 A CN 201610228489A CN 105714604 B CN105714604 B CN 105714604B
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- Prior art keywords
- paper
- filled
- filler suspension
- calcium silicates
- stock
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- 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
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
-
- 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
- D21H17/63—Inorganic compounds
- D21H17/66—Salts, e.g. alums
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- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Paper (AREA)
Abstract
The invention discloses a kind of method for improving calcium silicates and being filled with paper performance, the present invention is pre-processed using hydrochloric acid to calcium silicate filling material, the filler after processing is added in the string after defibrination, obtains being filled with paper by surfing the Net, shape, squeeze, after drying.This method can significantly improve the strength character of calcium silicates filled paper, have significant advantage in terms of high loaded sheet is developed.
Description
Technical field
The invention belongs to field of papermaking, and in particular to a kind of method for improving calcium silicates and being filled with paper performance.
Background technology
On the one hand filler is added in paper-making process can be effectively improved into paper optical property and printability, on the other hand,
Because filler cost is less than fiber, reduction production cost is also helped using filler.Therefore, improve paper in filer content into
One of target pursued for paper industry.However, paper strength performance can be reduced after adding filler, so as to cause paper surface to fall
Hair dry linting, production process break paper the problem of, therefore existing literature is filled with the strong of paper using being pre-processed to filler to improve
Spend performance.
These preprocess methods are included using high polymer materials containing hydroxyl such as starch, chitosans to filler Surface coating
Or filler is wadded a quilt with cotton the methods of poly- in advance using high molecular polymer, but preprocessing process to be all present numerous and diverse for these methods, in advance
The problems such as carrier performance after processing is unstable.
The content of the invention
It is an object of the invention to provide a kind of method for improving calcium silicates and being filled with paper performance, to overcome above-mentioned existing skill
The defects of art is present, the inventive method has the characteristics of simple, filler stability is good after pretreatment, while can significantly improve paper
Strength character.
To reach above-mentioned purpose, the present invention adopts the following technical scheme that：
A kind of method for improving calcium silicates and being filled with paper performance, comprises the following steps：
Step 1：After chemical softwood pulp and chemical hardwood pulp are carried out into size degradation respectively, by chemical pin after being diluted with water
Leaf wood pulp matches with chemical hardwood pulp carries out defibrination, after the completion of defibrination, the paper pulp after mill is diluted with water, obtains reduction paste
Material；
Step 2：Calcium silicate filling material is configured to filler suspension, it is pre-processed：Hanged while stirring to filler
The hydrochloric acid solution that mass concentration is 5%~30% is gradually added into supernatant liquid, makes pH=4~6 of filler suspension, is pre-processed
The filler suspension crossed；
Step 3：Pretreated filler suspension is added into diluted slurry, and is well mixed and forms copy paper paper stock；Will
Retention agent is added in copy paper paper stock, is sufficiently mixed rear Top wire former with copy paper paper stock, is carried out copy paper.
Further, after chemical softwood pulp and chemical hardwood pulp being carried out into size degradation respectively in step 1, it is diluted with water
And make stock quality concentration be 10%, then according to chemical softwood pulp：Chemical hardwood pulp mass ratio is 1:4 are ground
Starch, after the completion of defibrination, it is 0.1%~0.3% that the paper pulp after mill is diluted with water into mass concentration, obtains diluted slurry.
Further, in step 1 chemical needlebush and chemical leaf wood mixing defibrination after beating degree be 30 ° of SR~45 °
SR。
Further, the calcium silicate filling material average grain diameter in step 2 is 10~30 μm, and whiteness is 85%ISO~95%
ISO。
Further, calcium silicate filling material is configured to the filler suspension that mass fraction is 5~15% in step 2.
Further, mixing speed is 500~800r/min when being pre-processed in step 2 to filler suspension.
Further, the addition of filler suspension is 20%~50% of oven-dry weight in diluted slurry in step 3.
Further, the retention agent in step 3 is PAMC, its addition be 0.3 kg/ton of paper~
0.5 kg/ton of paper.
Further, retention agent is added in copy paper paper stock in step 3, be sufficiently mixed with copy paper paper stock after 20~40s
Net shaping, carries out copy paper.
Compared with prior art, the present invention has technique effect beneficial below：
The present invention by using hydrochloric acid to silicic acid Calcium preconditioning after, calcium silicates surface can be excited to produce a large amount of silicone hydroxyls, made
It forms chemical bond with fiber surface hydroxyl, so as to improve the strength character that calcium silicates is filled with paper, test result indicates that,
Under the conditions of identical Substance, papermaking process bar and filer content, the calcium silicate filling material filled paper tensile strength by pretreatment
It is better than the strength character of untreated calcium silicate filling material filled paper with tear strength properties, the raisings of tensile strength properties shows pair
Filler improves the adhesion of filler and fiber after being pre-processed, it is meant that have the space for further improving filer content, have
Beneficial to the high loaded sheet of exploitation.This method technique is simple, efficiently, calcium silicate products steady quality after pretreatment, meets height and fills out
Expect the requirement of papermaking.
Embodiment
The present invention is described in further detail with reference to embodiment：
Embodiment 1
1) chemical softwood pulp and chemical hardwood pulp are subjected to size degradation respectively, are diluted with water and make the stock quality concentration be
10%, then according to needlebush：Leaf wood mass ratio is 1:4 progress defibrination to beating degrees are 30 ° of SR, after the completion of defibrination, will be ground
Paper pulp afterwards is diluted with water to mass concentration as 0.1%；
2) calcium silicate filling material is configured to the filler suspension that mass fraction is 15%, uses agitator with 500r/min speed
Degree is stirred, and the hydrochloric acid solution that mass concentration is 5% is gradually added into filler suspension, makes filler suspension by original pH
=8~9 drop to pH for 4.0；
3) the pretreated filler that oven-dry weight (relative to pulp quality after mill) 20% is added into paper pulp after mill suspends
Liquid, and be well mixed and form copy paper paper stock；Retention agent PAMC is added into paper by the dosage of 0.3 kg/ton of paper
In material, Top wire former after 20s is sufficiently mixed with paper stock, carries out copy paper, paper physical property testing result is shown in Table 1.
The paper physical property testing result of 1 embodiment of table 1
Embodiment 2
1) chemical softwood pulp and chemical hardwood pulp are subjected to size degradation respectively, are diluted with water and make the stock quality concentration be
10%, then according to needlebush：Leaf wood mass ratio is 1:4 progress defibrination to beating degrees are 40 ° of SR, after the completion of defibrination, will be ground
Paper pulp afterwards is diluted with water to mass concentration as 0.25%；
2) calcium silicate filling material is configured to the filler suspension that mass fraction is 10%, uses agitator with 650r/min speed
Degree is stirred, and the hydrochloric acid solution that mass concentration is 15% is gradually added into filler suspension, makes filler suspension by original
PH=8~9 drop to pH for 5.4；
3) the pretreated filler that oven-dry weight (relative to pulp quality after mill) 30% is added into paper pulp after mill suspends
Liquid, and be well mixed and form copy paper paper stock；Retention agent PAMC is added into paper by the dosage of 0.4 kg/ton of paper
In material, Top wire former after 30s is sufficiently mixed with paper stock, carries out copy paper, paper physical property testing result is shown in Table 2.
The paper physical property testing result of 2 embodiment of table 2
Embodiment 3
1) chemical softwood pulp and chemical hardwood pulp are subjected to size degradation respectively, are diluted with water and make the stock quality concentration be
10%, then according to needlebush：Leaf wood mass ratio is 1:4 progress defibrination to beating degrees are 45 ° of SR, after the completion of defibrination, will be ground
Paper pulp afterwards is diluted with water to mass concentration as 0.3%；
2) calcium silicate filling material is configured to the filler suspension that mass fraction is 5%, uses agitator with 800r/min speed
Degree is stirred, and the hydrochloric acid solution that mass concentration is 30% is gradually added into filler suspension, makes filler suspension by original
PH=8~9 drop to pH for 6.0；
3) the pretreated filler that oven-dry weight (relative to pulp quality after mill) 50% is added into paper pulp after mill suspends
Liquid, and be well mixed and form copy paper paper stock；Retention agent PAMC is added into paper by the dosage of 0.5 kg/ton of paper
In material, Top wire former after 40s is sufficiently mixed with paper stock, carries out copy paper, paper physical property testing result is shown in Table 3.
The paper physical property testing result of 3 embodiment of table 3
Result above shows, pre- by hydrochloric acid solution under the conditions of identical Substance, papermaking process bar and filer content
The calcium silicate filling material filled paper tensile strength and tear strength properties of processing are strong better than untreated calcium silicate filling material filled paper
Performance is spent, the raising of tensile strength properties shows to improve the adhesion of filler and fiber after pre-processing filler, means
The space for further improving filer content, is advantageous to develop high loaded sheet.
Claims (5)
- A kind of 1. method for improving calcium silicates and being filled with paper performance, it is characterised in that comprise the following steps：Step 1：After chemical softwood pulp and chemical hardwood pulp are carried out into size degradation respectively, it is diluted with water and makes stock quality dense Degree is 10%, then according to chemical softwood pulp：Chemical hardwood pulp mass ratio is 1:4 progress defibrinations to beating degree is 30 ° SR~45 ° SR, after the completion of defibrination, the paper pulp after mill is diluted with water to mass concentration as 0.1%~0.3%, obtains reduction paste Material；Step 2：Calcium silicate filling material is configured to the filler suspension that mass fraction is 5~15%, it is pre-processed：Stir The hydrochloric acid solution that mass concentration is 5%~30% is gradually added into while mixing into filler suspension, makes the pH of filler suspension =4~6, obtain pretreated filler suspension；Step 3：Pretreated filler suspension is added into diluted slurry, the addition of filler suspension is diluted slurry The 20%~50% of middle oven-dry weight, and be well mixed and form copy paper paper stock；Retention agent is added in copy paper paper stock, with copy paper paper stock Rear Top wire former is sufficiently mixed, carries out copy paper.
- 2. a kind of method for improving calcium silicates and being filled with paper performance according to claim 1, it is characterised in that in step 2 Calcium silicate filling material average grain diameter be 10~30 μm, whiteness is 85%ISO~95%ISO.
- 3. a kind of method for improving calcium silicates and being filled with paper performance according to claim 1, it is characterised in that in step 2 Mixing speed is 500~800r/min when being pre-processed to filler suspension.
- 4. a kind of method for improving calcium silicates and being filled with paper performance according to claim 1, it is characterised in that in step 3 Retention agent be PAMC, its addition is 0.3 kg/ton of paper~0.5 kg/ton paper.
- 5. a kind of method for improving calcium silicates and being filled with paper performance according to claim 1, it is characterised in that in step 3 Retention agent is added in copy paper paper stock, Top wire former after 20~40s is sufficiently mixed with copy paper paper stock, carries out copy paper.
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| CN201610228489.7A CN105714604B (en) | 2016-04-13 | 2016-04-13 | A kind of method for improving calcium silicates and being filled with paper performance |
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| CN201610228489.7A CN105714604B (en) | 2016-04-13 | 2016-04-13 | A kind of method for improving calcium silicates and being filled with paper performance |
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| CN105714604A CN105714604A (en) | 2016-06-29 |
| CN105714604B true CN105714604B (en) | 2018-03-02 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1268600A (en) * | 2000-01-31 | 2000-10-04 | 四川宏达(集团)有限公司 | High-whiteness low-weight newsprinting paper and its production method |
| CN102190309A (en) * | 2011-01-06 | 2011-09-21 | 内蒙古大唐国际再生资源开发有限公司 | Method for lowering pH value of active calcium silicate |
| CN103147347A (en) * | 2013-03-07 | 2013-06-12 | 陕西科技大学 | Preparation method of composite filler for improving paper formation performance and method for preparing paper by using composite filler |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6228161B1 (en) * | 1996-12-30 | 2001-05-08 | Minerals Technologies Inc. | Use of calcium carbonate in an acidic aqueous media |
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2016
- 2016-04-13 CN CN201610228489.7A patent/CN105714604B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1268600A (en) * | 2000-01-31 | 2000-10-04 | 四川宏达(集团)有限公司 | High-whiteness low-weight newsprinting paper and its production method |
| CN102190309A (en) * | 2011-01-06 | 2011-09-21 | 内蒙古大唐国际再生资源开发有限公司 | Method for lowering pH value of active calcium silicate |
| CN103147347A (en) * | 2013-03-07 | 2013-06-12 | 陕西科技大学 | Preparation method of composite filler for improving paper formation performance and method for preparing paper by using composite filler |
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| CN105714604A (en) | 2016-06-29 |
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Effective date of registration: 20221010 Address after: 210009 Building E, 21st Floor, Jiangsu Yihe Commercial Building, No. 68, Shanxi Road, Gulou District, Nanjing, Jiangsu Province Patentee after: Jiangsu Jing'an New Material Technology Development Co.,Ltd. Address before: No. 1, Weiyang District university garden, Xi'an, Shaanxi Province, Shaanxi Patentee before: SHAANXI University OF SCIENCE & TECHNOLOGY |