CN1165888A - Straw pulp for producing offset printing paper by sulammonium process - Google Patents
Straw pulp for producing offset printing paper by sulammonium process Download PDFInfo
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- CN1165888A CN1165888A CN 97105618 CN97105618A CN1165888A CN 1165888 A CN1165888 A CN 1165888A CN 97105618 CN97105618 CN 97105618 CN 97105618 A CN97105618 A CN 97105618A CN 1165888 A CN1165888 A CN 1165888A
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- China
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- printing paper
- offset printing
- sulammonium
- grass
- paper
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Abstract
A method for producing paper for offset print with grass pulp prepared by ammonia base sulfate pulping includes preparing raw materials, digestion, screening, washing, purifying, concentration, bleaching, beating, proportioning, making paper, press polishing and reeling. In the digestion step, the liquid ratio is 1:2-2.5, the consumption of iminium is 15-17%, the consumption of buffering agent is 2-3%, pressure is 0.75-0.8 MPa, the temp is 160-175 deg.C, the temp is kept constant for 2-2.5 hr, the hardness to be decomposed is 10-12 K, residual iminium is 8-10 g/l and the pH value of residual liquid is higher than 7. Its advantages are less pollution, high output rate and high strength of fibre.
Description
The present invention relates to grass as raw material, particularly wheat straw raw material Ammonium Sulfite Method paper pulp making technology.
At present, producing offset printing paper abroad mostly is raw material with timber, and soda pulping process is though can obtain high-quality offset printing paper, cost height, seriously polluted, waste resource; More domestic paper mills are raw material with careless class, and soda pulping process is produced offset printing paper, though solved resource problem, but still have serious pollution, the test of indivedual producers is produced the glue printing paper with straw pulp by neutral ammonium sulfite process, never practical application.
The purpose of this invention is to provide a kind of method of polluting the straw pulp for producing offset printing paper by sulammonium process light, that cost is low.
The present invention is achieved in that technological process is, paper → press polish → batch is starched → copied in get the raw materials ready (chaffcutter → dedusting) → boiling → screening → washing → purification → concentrate → bleach → pull an oar → join.It is characterized in that at cooking process, grass is 1 with the ratio of water: 2-2.5, the imonium consumption accounts for the heavy 15-17% of over dry grass, the buffer consumption accounts for the heavy 2-3% of over dry grass, cooking pressure 0.75-0.8MPa, boiling temperature 160-175 ℃, but 2:00-2:30 during insulation, thick slurry quality is: hardness 10-12K value, residual imonium 8-10g/l, raffinate PH 〉=7.
In the cooking process of the present invention, conditions of cooking relatively relaxes, and is little to fiber destruction, making beating easily, and the fibre strength height makes into the paper fracture length and increases, and the pulping yield height is easy to bleaching.Papermaking wastewater is neutral, can make fertilizer.
Be raw material with the wheat straw below, describe in detail in conjunction with the embodiments.
(1) get the raw materials ready: with 100% wheat straw is raw material, chaffcutter specification 20-30mm, dust content≤5%, chaffcutter qualification rate 〉=85%.
(2) boiling: ball load 3400kg/ ball over dry grass, inferior peace consumption accounts for over dry grass 17% (by 100% imonium), and amount of urea accounts for over dry grass 2% (by 100%N), liquor ratio 1: 2.5, vapour pressure 0.75MPa, boiling curve:
Thick slurry quality: hardness 11-12 (K value), residual imonium 8-10g/l, black liquor PN 〉=7.
(3) screening: jump sieve sieve aperture φ 5-10mm.
(4) washing: the horizontal belt vacuum pulp washing machine, wash the residual imonium≤0.1g/l in back.
(5) purify: CX screening, the slagging-off of 606 hydrocyclones.
(6) concentrate: cylinder and side pressure thickener.
(7) bleaching: one section secondary bleaching of 35m3 bleaching machine, bleachability 10%, whiteness 〉=70%.
(8) making beating: 35-40 ° of SR of straw pulp beating degree, 40-48 ° of SR of wood pulp beating degree, the wood pulp of adding 25% in the straw pulp.
(9) join slurry: resin added 1.5%, (Al
3)
2SO
4Consumption 5%, brightening agent consumption 0.5%.
(10) copy paper: quantitative 70g/m
2, copy wide 1768mm, trim width 1760mm, speed of a motor vehicle 150m/min.
(11) press polish.
(12) batch.
The finished paper quality index is as follows:
Quantitative g/m
2: 70 ± 3.
Moisture content %:5-7
Degree of sizing mm: wood-free paper is greater than 0.75.
Whiteness: 〉=82%
Breaking length m: vertical 4100, horizontal 2700.
Claims (2)
1, a kind of method of straw pulp for producing offset printing paper by sulammonium process, comprise get the raw materials ready, screen, wash, purify, concentrate, bleach, pull an oar, join slurry, copy paper, press polish, coiling process, it is characterized in that the cooking process before screening, during boiling, grass is 1 with the ratio of water: 2-2.5, the imonium consumption accounts for the heavy 15-17% of over dry grass, the buffer consumption accounts for the heavy 2-3% of over dry grass for N content, cooking pressure 0.75-0.8MPa, boiling temperature 160-175 ℃, temperature retention time 2:00-2:30, rotary spherical digester pulp quality is: hardness 10-12K value, residual imonium 8-10g/l, raffinate PH 〉=7.
2, method according to claim 1 is characterized in that buffer is urea or ammoniacal liquor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97105618 CN1165888A (en) | 1997-01-10 | 1997-01-10 | Straw pulp for producing offset printing paper by sulammonium process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97105618 CN1165888A (en) | 1997-01-10 | 1997-01-10 | Straw pulp for producing offset printing paper by sulammonium process |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1165888A true CN1165888A (en) | 1997-11-26 |
Family
ID=5167937
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97105618 Pending CN1165888A (en) | 1997-01-10 | 1997-01-10 | Straw pulp for producing offset printing paper by sulammonium process |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1165888A (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102219565A (en) * | 2011-04-07 | 2011-10-19 | 杜建俊 | Process for producing organic fertilizer by using wheat bran |
| CN102250362A (en) * | 2011-04-07 | 2011-11-23 | 杜建俊 | Technology for producing ammonium lignosulfonate from wheat bran |
| CN101760985B (en) * | 2008-11-28 | 2012-05-02 | 山东福荫造纸环保科技有限公司 | High-opacity mixed pulp and cultural paper prepared from the same |
| CN101638862B (en) * | 2007-12-05 | 2012-05-30 | 山东福荫造纸环保科技有限公司 | Natural color offset plate printing paper and preparation method thereof |
| CN101760986B (en) * | 2008-11-28 | 2012-07-04 | 山东福荫造纸环保科技有限公司 | Mixed pulp with high bulk, air permeability and tear index and cultural paper made thereof |
| CN105730841A (en) * | 2016-04-29 | 2016-07-06 | 洪帅 | Portable lifting handle and manufacturing method of portable lifting handle |
| CN108951267A (en) * | 2017-05-24 | 2018-12-07 | 中国制浆造纸研究院有限公司 | It is a kind of using Wheat Straw Pulp as the Light-weight printing paper of fibrous raw material and its manufacturing method |
-
1997
- 1997-01-10 CN CN 97105618 patent/CN1165888A/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101638862B (en) * | 2007-12-05 | 2012-05-30 | 山东福荫造纸环保科技有限公司 | Natural color offset plate printing paper and preparation method thereof |
| CN101760985B (en) * | 2008-11-28 | 2012-05-02 | 山东福荫造纸环保科技有限公司 | High-opacity mixed pulp and cultural paper prepared from the same |
| CN101760986B (en) * | 2008-11-28 | 2012-07-04 | 山东福荫造纸环保科技有限公司 | Mixed pulp with high bulk, air permeability and tear index and cultural paper made thereof |
| CN102219565A (en) * | 2011-04-07 | 2011-10-19 | 杜建俊 | Process for producing organic fertilizer by using wheat bran |
| CN102250362A (en) * | 2011-04-07 | 2011-11-23 | 杜建俊 | Technology for producing ammonium lignosulfonate from wheat bran |
| CN105730841A (en) * | 2016-04-29 | 2016-07-06 | 洪帅 | Portable lifting handle and manufacturing method of portable lifting handle |
| CN108951267A (en) * | 2017-05-24 | 2018-12-07 | 中国制浆造纸研究院有限公司 | It is a kind of using Wheat Straw Pulp as the Light-weight printing paper of fibrous raw material and its manufacturing method |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C01 | Deemed withdrawal of patent application (patent law 1993) | ||
| WD01 | Invention patent application deemed withdrawn after publication |