CN1105801C - Middle- and high-grade stationery paper made of rice straw pulp and its making process - Google Patents
Middle- and high-grade stationery paper made of rice straw pulp and its making process Download PDFInfo
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- CN1105801C CN1105801C CN 99124703 CN99124703A CN1105801C CN 1105801 C CN1105801 C CN 1105801C CN 99124703 CN99124703 CN 99124703 CN 99124703 A CN99124703 A CN 99124703A CN 1105801 C CN1105801 C CN 1105801C
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Abstract
The present invention relates to medium-grade and high-grade cultural paper prepared from straw pulp and a technology thereof. Straw is used as a main raw material which is properly matched with reed pulp and softwood pulp to manufacture a high-grade paper product, and corresponding technical conditions are supplied. The ratio of the used straw pulp can reach above 2/3; because mainly technical conditions of steaming, wash and selection, bleaching, pulping, etc. are optimally established, a new technology is formed. Various kinds of manufactured medium-grade and high-grade cultural paper conform a standard. The established technical conditions are advanced and are easy to implement, and abundant straw resources can be effectively used by the technical conditions. The present invention has the advantages of low cost and good benefit, and large amounts of wood can be saved.
Description
It is main paper pulp raw material that described cultural paper and technology relate to utilize crop stalk, with addition of a small amount of reed straw pulp, wood pulp and the new technology condition in the paper is copied in fine paper product of producing and slurrying.It especially relates to cultural paper product and the process conditions that the rice straw pulp that adopts big proportioning is produced various middle and high shelves.
In real paper, existing about utilizing straw to do raw material, the technology and the product of general cultural paper produced in slurrying.Known to retrieval and investigation, the full straw of the usefulness that has test manufacture glazed paper has plenty of adapted bleaching rice straw pulp and produces high-grade culture with paper etc.Full straw glazed paper can only be applicable to general applications such as writes, and the application of the higher class of incompatibility is not as being used for the paper of using of xerography, hectographic printing, drawing etc.And the high-grade paper of adapted rice straw pulp, its rice straw pulp is not a Main Ingredients and Appearance just with addition of raw material, therefore proportion maximum only 50% also is unlikely to have influence on significantly main composition pulp quality.Straw is the stem stalk of rice crop, be grass, the characteristic of straw and pine difference are very big, and its fiber is short and thick, average length only is the 1.14-1.52 millimeter, width 0.006-0.009 millimeter, fiber content is low, heteroproteose cell and the ash content of coal height, and slurry viscosity is big, be difficult for drainage, very big to copying the paper influence, the difficulty of on long mesh paper making machine, manufacturing paper with pulp, use cylinder mould machine to produce and write, have light and typographic printing paper, only between 54-60%, beating degree is at 45 ° of-47 ° of SR for the bleaching whiteness.Simple straw raw material is made the also discovery as yet of senior paper product at present.But according to our development test, neither adopt full straw also not adopt the rice straw pulp of small scale to do batching, but the rice straw pulp of employing vast scale, and on the main technique link, seek the technology breakthrough and set up the corresponding techniques condition, also be can produce the high culture paper product fully.
The objective of the invention is to do main raw material, adopt the rice straw pulp of refining big proportioning, be aided with reed straw pulp, softwood pulp, make middle and high shelves cultural paper product and its new technology condition is provided with straw.
The middle and high shelves cultural paper and the technology of described invention comprise the raw material composition of paper pulp, the proportioning of synthetic paper-pulp and the technology condition that paper is copied in slurrying.Its Main Ingredients and Appearance is that rice straw pulp, usage ratio account for 65-80%, and the adapted composition is that softwood pulp, ratio account for 5-15%, all the other adapted reed straw pulps.Slurrying is copied the paper new technology and mainly is its cooking schedule, washing process condition, bleaching conditions and beating process condition.Wherein, the cooking schedule that rice straw pulp is produced: adopt the boiling of inferior sodium method, alkali charge is by NaOH 5%-7%, and the sulfiting degree is by NaOH 17%-20%, and liquor ratio is 1: 3.3-3.5,85 ℃-90 ℃ of alkali liquid temperatures; Boiling curve: dally 10 minutes, heat up 45 minutes, steam pressure 0-0.45MPa, insulation 10-20 minute.The cooking schedule that the reed straw pulp is produced: adopt the sulphite boiling, alkali charge is by NaOH 17%-20%, and sulphidity is pressed NaOH 14%-16%, liquor ratio 1: 3.6-3.8,85 ℃-90 ℃ of alkali liquid temperatures; Boiling curve: dally 10 minutes, heat up 30 minutes, steam pressure 0-0.45MPa, discharge opeing 20-30 minute, steam discharge 10 minutes, fluid injection, secondary temperature elevation 1 hour, pressure 0-0.55MPa, 30 fens kinds of insulation.Washing process condition: adopt horizontal belt to wash, jump roughly selecting of sieve → bed washer → CX sieve and insert the selected of three sections Bao Ers of secondary.Bleaching conditions: adopt hypochlorite to float for one section, 38 ℃-42 ℃ of bleaching temperatures, bleaching concentration 5.4-5.6%, 1-1.5 hour circulation timei, bleachability 6.5-7%, terminal point PH8.5-9, residual chlorine≤0.5g/l, the whiteness 73-76% of bleaching back slurry.The beating process condition: rice straw pulp is mixed the reed straw pulp and is adopted mill → fluffer string to beat or fluffer → fluffer string is beaten, and softwood pulp adopts the mill string to beat.Obtain each refined stock by this beating process condition.Import into then and join slurry, promptly in the mixed slurry of refining rice straw pulp and reed straw pulp,, dose secondary material such as product orchid, brightening agent, rosin and aluminum sulfate, then enter the machine machine hand section of planting with addition of softwood pulp.
Advantage of the present invention: straw accounts for exhausted vast scale, and abundant raw material, cost are low, and its paper product quality reaches the national standard of middle and high shelves cultural paper fully; The new process conditions that foundation provides is implemented easily, and general papermaking enterprise can be introduced employing through suitable technological transformation; Can reduce timber significantly and use or the wood pulp import, make agriculture straw byproduct obtain considerable increment, the environmental pollution that can significantly reduce or avoid crop straw burning to cause simultaneously
Accompanying drawing Fig. 1 slurrying papermaking process general flow chart
Embodiment 1: the proportioning of the technology of described middle and high shelves cultural paper and technology being implemented to have selected for use by the paper product of different purposes three kinds of compositions of paper pulp, in whole process flow, should carry out enforcement by existing technological standards to the general technology link, and should strictly carry out the technology condition that is provided boiling, washing, bleaching and beating process link.Below in conjunction with making 80 gram wood-free papers, 100 gram drawing papers and 70 gram electro-photographic papers goal of the invention is done further narration.
A.80 restrain wood-free paper (belonging to middle-grade cultural paper)
Paper pulp proportioning components: rice straw pulp 75%, reed straw pulp 17%, softwood pulp 8%.
B.100 restrain drawing paper (belonging to middle-grade cultural paper)
Paper pulp proportioning components: rice straw pulp 80%, reed straw pulp 15%, softwood pulp 5%.
C.70 restrain electro-photographic paper (belonging to the high-grade paper of using)
Paper pulp proportioning components: rice straw pulp 70%, reed straw pulp 18%, softwood pulp 12%.
Rice straw pulp and reed straw pulp are from slurrying, and softwood pulp is a bought-in article, and the technical process that paper is copied in slurrying is as follows:
Rice straw pulp: after chaffcutter → dedusting → preimpregnation, the process conditions when entering the boiling link are: ball load 3500kg, hydro-oxidation sodium 200kg, sodium sulfite 50kg, liquor ratio 1: 3.5,85 ℃-90 ℃ of alkali liquid temperatures; Boiling curve; Dally 10 minutes, heated up 45 minutes, steam pressure 0-0.45MPa, insulation 10-20 minute, setting-out 10 minutes, put pot 10 minutes.Thick slurry quality: hardness K value 8-11, residual alkali 3-5g/l does not steam and separates a part 2-4%.Thick slurry after the boiling enters the process section of washing → screening → purification → bleaching.Wherein the washing process condition is: adopt horizontal belt to wash, what jumping sieve, bed washer, CX in parallel sieved roughly selects, and connects the selected of three sections Bao Ers of secondary again.Bleach after dehydration, bleaching conditions is: adopt hypochlorite to float for one section, 38 ℃-42 ℃ of bleaching temperatures, bleachability 6.7-7%, terminal point PH8.5-9, the whiteness 73-76% of residual chlorine≤0.5g/l, bleaching back slurry.Enter the making beating link again after after floating, washing processing, add the reed straw pulp and carry out together.The process conditions of its making beating are: after rice straw pulp is mixed the reed straw pulp, adopt 1 450 double plate mill to serially add 2 fluffer strings and beat or adopt 2 fluffer strings to beat.Softwood pulp adopts 3 450 double plate mill strings to beat.
The reed straw pulp: technology adopts prior art (summary) more, and difference is its cooking schedule: ball load 3500kg, NaOH 550kg, vulcanized sodium 100kg, liquor ratio 1: 3.7,85 ℃-90 ℃ of alkali liquid temperatures; Boiling curve: dallied 10 minutes, heated up 30 minutes, steam pressure 0-0.45MPa, 30 fens kinds of discharge opeing, steam discharge 10 minutes, fluid injection, secondary temperature elevation 1 hour, pressure 0-0.55MPa, be incubated 30 minutes, slightly starch quality: hardness K value 12-14, residual alkali 8-12g/l does not steam and separates a part 4-6%.
After each composition making beating, join slurry, dose secondary material such as product orchid, brightening agent, rosin, aluminum sulfate, enter paper machine making,, finish each operation to becoming paper.For understanding, with several technic indexs tabulate in after.
In this embodiment, the proportioning of the corresponding composition of paper pulp of three kinds of paper products is selected for use, is not limited only to this, but can have multiplely, and ratio can be selected for use arbitrarily in the scope that provides, and produces the middle and high shelves cultural paper of different paper kinds.Rice straw pulp and softwood pulp provide definite proportion, and the reed straw pulp is for mending with slurry.As selecting rice straw pulp 65%, softwood pulp 15% for use, the proportioning of reed straw pulp 20% is implemented, and still carries out the process conditions that provide.Do not give unnecessary details.
Claims (1)
1, the middle and high shelves of rice straw pulp cultural paper, comprise the paper pulp raw material composition, slurrying machine hand skill, the main composition that it is characterized in that this middle and high shelves cultural paper is a rice straw pulp, with addition of composition is softwood pulp and reed straw pulp, each proportioning components of synthetic pulp is: rice straw pulp is 65-80%, and softwood pulp is 5-15%, and all the other are the reed straw pulp; Described slurrying machine hand skill is to optimize the cooking schedule of foundation, the washing process condition, and bleaching conditions and beating process condition:
A. the cooking schedule produced of rice straw pulp
Adopt the boiling of inferior sodium method, alkali charge is by NaOH 5%-7%, and the sulfiting degree is by NaOH 17%-20%, liquor ratio 1: 3.3-3.5, and 85 ℃-90 ℃ of alkali liquid temperatures,
Boiling curve: dallied 10 minutes, heated up 45 minutes, steam pressure 0-0.45MPa is incubated 10-20 minute,
B. the cooking schedule produced of reed straw pulp
Adopt the sulphite boiling, alkali charge is by NaOH 17%-20%, and sulphidity is pressed NaOH 14%-16%, liquor ratio 1: 3.6-3.8, and 85 ℃-90 ℃ of alkali liquid temperatures,
Boiling curve: dally 10 minutes, heat up 30 minutes, steam pressure 0-0.45MPa, discharge opeing 20-30 minute, steam discharge 10 minutes, secondary temperature elevation 1 hour, pressure 0-0.55MPa, insulation 30 minutes,
C. the washing process condition is washed through horizontal belt is arranged, and jump roughly selecting of sieve → bed washer → CX sieve and add the selected of three sections Bao Ers of secondary,
D. bleaching conditions adopts hypochlorite to float for one section, 38 ℃-42 ℃ of bleaching temperatures, and bleaching concentration 5.4-5.6%, 1-1.5 hour circulation timei, bleachability 6.5-7%, terminal point PH8.5-9, residual chlorine≤0.5g/l, the whiteness 73-76% of bleaching back slurry,
E. beating process condition: rice straw pulp is mixed the reed straw pulp and is adopted mill → fluffer string to beat or fluffer → fluffer string is beaten, and softwood pulp adopts mill → mill string to beat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99124703 CN1105801C (en) | 1999-11-22 | 1999-11-22 | Middle- and high-grade stationery paper made of rice straw pulp and its making process |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 99124703 CN1105801C (en) | 1999-11-22 | 1999-11-22 | Middle- and high-grade stationery paper made of rice straw pulp and its making process |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1297084A CN1297084A (en) | 2001-05-30 |
| CN1105801C true CN1105801C (en) | 2003-04-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 99124703 Expired - Fee Related CN1105801C (en) | 1999-11-22 | 1999-11-22 | Middle- and high-grade stationery paper made of rice straw pulp and its making process |
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Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100402275C (en) * | 2004-02-11 | 2008-07-16 | 徐华 | Degradable plant fiber packaging bag and preparation method thereof |
| WO2009070955A1 (en) * | 2007-12-05 | 2009-06-11 | Shandong Fuyin Paper & Environmental Protection Technology Co., Ltd | Grass type unbleached paper products and production method thereof |
| CN101613969B (en) * | 2008-06-25 | 2011-08-31 | 山东中科润环保科技有限公司 | Pulping process for paper product pulp |
| CN102191707B (en) * | 2010-12-30 | 2013-01-16 | 中冶美利纸业股份有限公司 | Low temperature rapid pulping process of reed |
| CN103103872B (en) * | 2012-12-14 | 2015-09-09 | 中冶美利纸业股份有限公司 | Vast scale reducing rules produces the method for copy paper |
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- 1999-11-22 CN CN 99124703 patent/CN1105801C/en not_active Expired - Fee Related
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