CN101768894A - Soapstone product for papermaking adhesive control agent and manufacturing method thereof - Google Patents
Soapstone product for papermaking adhesive control agent and manufacturing method thereof Download PDFInfo
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Abstract
The invention relates to a soapstone product which is specially used for controlling negative ion adhesive in the pulping papermaking process and is manufactured by soapstone raw materials through breaking, ultra fine grinding, classification, composite modification and pelleting processes; the soapstone product is characterized in that: the product is formed by the following ingredients: 70-98 percent of soapstone, and one or two of 2.0-5.0 percent of bentonite and 10-30 percent of kieselguhr; the ingredients are modified by 30-120ppm of cationic polyacrylamide; and aqueous phase dispersoid suspension charges are in weak cationic property, and the zate potential value is less than 30mv. Compared with the high-purity adhesive control agent soapstone which is manufactured without composite modification process and is used singly, the anion adhesive content in papermaking plain boiled water can be remarkably reduced and the pulping papermaking production running is promoted.
Description
Technical field
The present invention relates to a kind of being exclusively used in and solve paper-making pulping process and paper making process, a kind of composite modified talc product and manufacture method thereof that manufacture paper with pulp obstacle and the production run decline that causes because of the deposition of the anion stickies that exists in the slurry is made.Be with the talcum raw material specifically, produce cationic composite modified talcum granulation product by the technology of the present invention with functional characteristic.Belong to papermaking talcum process and utilization technology field.
Background technology:
Talcum is a papermaking filler in the conventional use of field of papermaking.Talcum specific molecular structure characteristic, make it have characteristics such as soft, lubricated, oleophilic drainage, in paper-making industry also as a kind of mineral products of papermaking stickies controlling agent, avoiding the pulping and paper-making production process to descend because of the deposition and the production efficiency that causes of adhesion of anion stickies on production equipments such as pipeline, storage tank, screen cloth, and manufacture paper with pulp obstacle and the paper product quality decline problem that cause in the stickies deposition that paper making process produces.For example, the high-quality layers foliated talc raw material of purity 〉=97% is selected by French Luzenac company, is the similar products of Mistron3S through a kind of trade names of the resin control that is used for pulp mill of dry method ultra-fine grinding, grading technology manufacturing; Its product commercial technology index is characterized as 3.5 microns of average grain diameters, specific area (BET) 15m
2/ g, moisture 0.3%, PH9.1, abrasion degree 4.0mg.
Traditional technical know-how and production practices are thought, the talc product that is used for the control of papermaking stickies, needing to select particle shape is the high-quality talcum raw material of synusia shape, its pure talc mineral composition is no less than 95%, and the result of use of low-quality talcum is not obvious, is not suitable for being used to make stickies controlling agent product.How further to improve the serviceability of the stickies control special product made from high-quality talcum raw material, and how to make full use of low-quality talcum resource, producing the high-performance papermaking stickies controlling agent special product with better functional characteristic, is the technical barrier that talcum processing industry and paper-making industry need to be resolved hurrily.
Summary of the invention:
The present invention relates to a kind of composite modified talc product and manufacture method thereof that is exclusively used in papermaking stickies controlling agent, comprising:
(1) the product appearance features is the white circular cylinder of diameter 6.0mm, high 5.0-10.0mm.Product whiteness (ISO) 80%-93%; Specific area (BET) 15.0-17.0m
2/ g; Oil factor 〉=40.0g/100g; Average grain diameter 1.5-3.0 micron, maximum particle diameter is less than 15 microns; Contain moisture 1.0%-5.0% in the product; The water dispersion suspension of product presents the weak cation characteristic, and the zate potential value is less than 30mv.
(2) the product essential mineral consists of fineness 800-1500 order, and the purity of 75%-98% is the natural platy particle form talcum of 70%-99%.Composite one or both of natural minerals powders such as bentonite, diatomite in the product, its composite mass percent is respectively: bentonite 2.0%-5.0%, diatomite 8.0%-30%.And containing 30-120ppm, molecular weight is the cationic-type polyacrylamide of 500-1200 molecular weight.
The Manufacturing Method of Products that the present invention relates to comprises:
(1) with the talcum component greater than 95% high-quality talcum or the low-quality natural block raw material of talcum component 70%-80%, through just being crushed to diameter less than 5mm, dry method is once pulverized and is ground to 200 orders-500 order fine powder in roller press type or impact grinder.Carry out secondary and pulverize and grind through having the airflow milling of grader or impact grinder again, and be 800 order to 1500 order superfine powders to fineness by the grader classification.
(2) the talcum fine powder that will reach fineness requirement carries out composite the mixing with bentonite, diatomite, and carries out cation modifying.The complex method of product is with in the diatomite of the bentonite of extra fine talc and 2.0%-5.0% (to talcum) and 10.0%-30.0% (to talcum) one or both, places composite modified device to stir; Spray into simultaneously and be diluted to 0.1-0.5% concentration in advance, molecular weight is the cationic-type polyacrylamide polymer of 500-1200 ten thousand units, blend; Polyacrylamide polymers is 30-120ppm to the addition of composite powder.
(3) powder product after composite modified carries out granulation and handles, to obtain the pelletized product of high-bulk-density.Its prilling process is with the granulation to mineral powder dry method squash type or the rolling-type comminutor of the powder conveying after composite modified.Comminutor extrusion die casement amount is: compression end Φ
17.0～8.0mm, h
15.0～6.0mm; Transportation section Φ 6.0～7.0mm, H20.0～22.0mm; Output Φ
26.0～8.0mm, h
224.0～26.0mm.
The present invention is based on the distinctive physicochemical property of different natural minerals powders, by super-fine processing, a kind of talc product that is exclusively used in the control of papermaking stickies compound and that carry out the manufacturing of cation modifying method with organic high molecular polymer.The serviceability of the product that is the main raw material manufacturing not only can be improved and promote with the high-purity talc to this manufacture method, and be applicable to that low-quality talcum is the talcum manufactured goods of main raw material.
The chemical composition of the operation that the anion stickiness deposit that pulping and papermaking processes produces causes and the oxious component of the obstacle of manufacturing paper with pulp is very complicated, and it has comprised free fatty, resin acid, triglyceride and unsaponifiable matter etc. in the plant fiber materials such as timber.Also comprise the sticky matter in the secondary stock (reclaimed waste paper), as printing ink residue, tar, latex, pressure sensitive adhesive and the caused deposit of other organic matter, and the adhesive in the defoamer that adds in the paper-making process, gum rosin, coating and residue of tiny inorganic filler etc.The accumulation of these harmful substances in the pulping and papermaking equipments system can cause the difficulty of the decline and the production operation of paper product quality, reduces production run efficient.
The chemical name of talcum: hydrated magnesium silicate; Molecular formula: 3MgO4SiO
2H
2O; Tetrahedral structure.The theoretical chemistry of pure talcum is formed: SiO
263.47%; MgO 31.68%; H
2O 4.75%.Mg in the talcum molecular structure (OH)
2The class octahedral structure, be positioned at the molecule internal layer; Talcum edge Mg (OH)
2The hydroxyl structure that exposes makes talcum be anionic property, has slightly water-wet.SiO
2Be exposed to layer structure parallel surface surface, SiO
2The class tetrahedral structure form lipophilic-hydrophobic property.Talcum is used for the principle of papermaking anion stickies control, mainly is to utilize to be exposed to the lip-deep class tetrahedral structure of talcum synusia shape parallelism structural face SiO
2Form than the strong oil-wet characteristic, it can adhere in the paper manufacturing systems stickies such as hydrophobicity anion colloidal resin, reduces the stickies surface energy, makes it lose peculiar viscosity, thereby suppresses the adhesion of stickies, coalescent and deposition.Coalescent gluey stickiness having taken place on the other hand disperseed thing, also can adsorb talc powder body, thereby reduce the stickies surface viscosity, has avoided further coalescent and deposition.The process of manufacturing paper with pulp at paper or pulpboard, be deposited on the tiny stickies-talcum agglomerate particle on talcum surface, do not influencing under paper or the pulpboard quality situation, collaborative talcum is copied in page or the pulpboard as filler, thereby the decline of the sticking wall of the conveyance conduit of having avoided the anion stickies in production equipment system, to cause, obstruction screen cloth and production runs such as wet end, glutinous roller, and the decline of paper quality because of deposition.The microscopic pattern of talcum purity, fineness, specific area and particle directly influences the effect of stickies in the control paper pulp, shows as table 1 experimental data: talcum purity is higher, and particle is thinner, and specific area is bigger, and lipophile is stronger; Remarkable more to stickies effect in the control paper pulp.And inferior talcum result of use is poor, inapplicable manufacturing papermaking stickies controlling agent product.
The different quality talcums of table 1 are to the effect of papermaking stickies
Diatomite is a kind of amorphous in nature matter silicide with pore structure, and chemical molecular formula is SiO
2It is little to have proportion, high pore volume and specific area, high adsorption and oil-wet behavior.The mechanism that is used for papermaking stickies control mainly is the loose structure that utilizes diatom reaches the accumulation purpose that reduces and eliminate stickies in the paper pulp to the oleophylic suction-operated of stickies.Allocate the oil factor index that diatomite can obviously promote composite granule in the product into, improve the capture effect of stickies in the slurry and play the plain boiled water effect that purifies.
Bentonite is a kind of natural clay rock based on the montmorillonite mineral composition, the theoretical construct formula be (1/2Ca, Na)
0.7(Al, Mg, Fe)
4(Si, Al)
8O
20(OH)
4.nH
2O, Ca wherein, Na are tradable CATION, and CATION and polar molecule are strong adsorptivity and different valency isomorphous replacement.The present invention has selected a kind of fineness less than 500nm, has the organically-modified sodium base commodity raw material of high oleophilic drainage characteristic, mainly is the control that the strong adsorptivity that has by bentonite and cation exchange property are realized the papermaking stickies.Bentonite also helps as a kind of retention usually in paper-making industry considers the agent use, itself and talcum be mixed not only help the capture of composite granule stickies in the slurry, help fiber fines simultaneously and capture keeping of stickies particle, play the effect that purifies plain boiled water and improve production run.
Polyacrylamide is a kind of organic high molecular polymer, and the present invention selects cation type polymer that the compound powder of talcum-bentonite-diatomite that is anionic property is carried out cation modifying.Because the harmful stickies in the paper pulp is anion characteristic, can more effectively adhere to and adsorb emplastic through the composite granule of cationization, be harmful to the stickies effect in the paper making pulp system thereby promote greatly to remove.
The product of manufacturing of the present invention has been owing to made full use of different structure characteristic mineral powder to different choice absorption and attachment characteristic principle that the complicated stickies component in the paper making pulp system is had, carries out reasonably compositely and compound, can learn from other's strong points to offset one's weaknesses mutually.Simultaneously composite granule is carried out the organic cation modification.Do not control product relatively with carrying out composite modified single high-quality talcum stickies, obviously improved the integrated application effect.Table 2 example has gone out the laboratory contrast effect that compound high-quality homemade talcum and the special-purpose commodity papermaking of import stickies controlling agent talcum are not carried out in two kinds of products of the present invention and single employing.Wherein to have selected through X diffraction analysis talcum component be 98.6% high-quality talcum to AHPC-01 type product, carries out composite modified cationic talc product with 2.5% commodity bentonite and the 8000000 unit polyacrylamides of 50ppm.It is 73.6% low-quality talcum that AHPC-02 type product has been selected through X diffraction analysis talcum component, carries out composite modified cationic talc product with the 1000 ten thousand unit polyacrylamides of 3.5% commodity bentonite, 25% diatomite and 70ppm.Experimental result shows, the AHPC-01 type product of the present invention that adopts high-quality talcum raw material to make, compare with the not composite modified product that adopts same raw material, stickies clearance in the slurry rises to 90～95% by 85～90%, compare with the special-purpose commodity talc of import Mistron3S, the stickies clearance is carried and has been done 10%.Adopt the special-purpose commodity talc of low-quality talcum raw material its stickies clearance of AHPC-02 type product made and the not composite modified product that adopts high-quality talcum raw material and import Mistron3S relatively, improved 5% and 10% respectively, reached and the equal effect of AHPC-01 type product of the present invention.
The effect of composite modified talc product of table 2 and commodity papermaking stickies controlling agent talc product relatively
Description of drawings:
Fig. 1 is a product manufacture schematic flow sheet of the present invention.
Fig. 2 is the casement of the comminutor extrusion die of the present invention figure that takes measurements.
1 technological process is described with reference to the accompanying drawings, and the first fragmentation of block talcum raw material can select Hubei Province formula of commodity universal models or hammer mill to carry out fragmentation. Less than the talcum of 5mm, through disposing marque impact grinder or the three-stage roll mill of internal or external grader, for example Raymond mill, impact grinding, vibrations mill carry out the first level flour breakdown mill after broken; And carry out scalping by grader. To the different fineness product requirement, the fine powder after scalping enters the fine powder warehouse according to the client. The meal that the 200-500 order meal that the first level flour breakdown mill goes out and scalping go out enters the secondary ultra-fine grinding and grinds. Secondary ultra-fine grinding milling apparatus can be selected airflow milling or the milling apparatus such as ball mill or vibrations mill of marque. Superfine powder after the regrind is through carrying out secondary grading with internal or external grader, and what wherein classification went out enters the fine powder warehouse greater than 600 order superfine powders; Meal behind the secondary grading reenters the secondary ultra-fine grinding and grinds, to improve the fine powder productive rate.
The composite modified of micronized talc powder that reaches fineness requirement is manufacturing technology key of the present invention. The composite modified of talc powder body is to carry out in composite modified device. Composite modified equipment can be selected the height of marque to stir any equipment gap in mixer or the equipment such as screw mixer or banbury or produce continuously, also can adopt two or more device combinations, and series connection is produced continuously. With the talc powder body in the fine powder warehouse, metering is delivered to composite modified device earlier; According to the fineness requirement of client to different papermaking stickies control talc products, with in the commodity diatomite of the commodity bentonite of 2.0%-5.0% (to the talcum mass percent) and 10%-30% (to the talcum mass percent) one or both, be delivered to blend in the composite modified device by metering, stir.
Polyacrylamide is a kind of organic high molecular polymer, what the present invention selected is that molecular weight is the commodity cation type polymer of 500-1200 ten thousand units, earlier its water is pressed the dissolving of 0.1-0.5% concentration dilution before the use, spray into blend in talcum-bentonite in the composite modified device-compound powder of diatomite by delivery pump metering, carry out cation modifying. Addition to composite powder is 30-120ppm; And keeping composite modified powder to present the weak cation characteristic at the electric charge of water dispersion suspension, the zeta potential value is less than 30mv. Mix rear the adding with the supplementing water that sprays into ribbon mixer before also can being chosen in granulation at the adding position of the polyacrylamide amine solution after the dilution.
The composite modified talc product of papermaking stickies of manufacturing of the present invention is a kind of granular product of processing through granulation. Its objective is the packing and the cost of transportation that reduce product, and the dispersion when helping the client to use is dissociated and is reduced dust pollution to production environment. The manufacturing of granulation product be the powder semi-finished product after composite modified are delivered in the ribbon mixer and with the mixed liquor of the suitable quantity of water that sprays into or water and polyacrylamide amine solution, fully mix, and control final products moisture≤5%. The powder that will mix with water is delivered to granulation in the comminutor through metering. Granulation Equipments can select mineral powder dry method extruded type comminutor or the roller pressing type particle making machine of marque to carry out granulation, for example the dry method squash type Granulation Equipments of Ka Er company manufacturing. Comminutor extrusion die casement amount is: compression end Φ17.0～8.0mm，h
15～6mm; Transportation section Φ 6.0～7.0mm, H 20.O～22.0mm; Output Φ26.0～8.0mm，h
224.0～26.0mm. (seeing shown in Figure 2). The appearance and size of the cylindric product of preparing is diameter 6.0mm, high 5.O～10.0mm. Pelletized product after granulation is by dry sifter screening, and finished product enters the packing machine packing; Broken defective work after the screening and fine powder return again granulation of ribbon mixer.
The specific embodiment:
Embodiment 1
Select a kind of through the X diffraction analysis, the talcum component is that the talcum of 99% high-purity plate-like particle shape is a main raw material, through super-fine processing to 1000 order, and carry out composite modified cationic talc product with 2.5% commodity bentonite and the 8000000 unit polyacrylamides of 45～50ppm.The average grain diameter of product is 2.3 μ m, and oil factor is 52g/100g, in its water dispersion zate potential value be+10mv～+ 15mv.Final granulation product is made as AHPC-01 type product.
Select another through the X diffraction analysis, the talcum component is that the talcum of 72.4% low-quality amorphous particle shape is a main raw material.The talcum raw material is worked into 1200 orders, allocated the bentonite of 3.O% into, 20% diatomite, and carry out the 8000000 unit polyacrylamides of 85～90ppm composite modified, the average grain diameter of product is 2.2 μ m, oil factor is 63g/100g, the dispersion zate potential value in water is+and 20mv～+ 25mv.Final granulation product is made as AHPC-03 type product.
3700 tons of sulfate pulp factories of certain daily output, wood raw material is leaf wood assortments such as the Eucalyptus, acacia rachii, poplar of different proportion; Paper pulp organic solvent extract (DCM) average content O.43% before the bleaching; Adopt D0, E/O, four sections chemical bleaching technologies of D1, D2; The pulp machine speed of a motor vehicle 150～200m/min that manufactures paper with pulp.The former paper making pulp anion stickies controlling agent talcum powder product that uses a kind of import trade mark as Mistron3S of this factory, main purpose is that the resin stickies of pulping process is controlled.
Select above-mentioned two kinds of products of the present invention that adopt different talcum raw materials and different composite modified technique condition to make, and carry out commercial Application relatively with import Mistron3S product.The major technique feature of three kinds of talc products is listed table 3 in; Carry out continuous 3 months application contrast experiment respectively; Composite modified talc product divides two positions to add at chemical bleaching-washing room; Total addition of talcum and resin stickies control effect listed in table 4.
Three kinds of talc product major techniques of table 3 feature
The different talc products of table 4 compare the effect of resin stickies control
Table 4 effect shows that product of the present invention and imported product compare, and the total addition of talcum is reduced to the 2.5～3.0kg/ ton slurry that uses product of the present invention by 4.5～5.0kg/ ton slurry of original use imported product.Not only prolong pulp screen and the pulpboard wash time of production equipments such as machine of manufacturing paper with pulp, and obviously reduced the DCM extract content in the plain boiled water of manufacturing paper with pulp.Improve the clean level of the plain boiled water of manufacturing paper with pulp greatly, improved production run efficient, reduced the use amount and the use cost of stickies controlling agent talc product.Select the serviceability of the AHPC-03 product of the present invention of low-quality talcum raw material manufacturing to reach the close comprehensive result of use made from high-quality talcum of AHPC-01 product equally, and the stickies clearance bring up to 90.7% by 88.4% in the slurry.
Embodiment 2
Select a kind ofly through the X diffraction analysis, the talcum component is that 71% inferior platy particle form is main talcum ore.Through the talc powder body of super-fine processing to 1250 order fineness, carry out compoundly with 4.0% commodity bentonite, 28% diatomite, and the 1000 ten thousand unit polyacrylamides that add 80～100ppm carry out cation modifying.The average grain diameter of its product is 2.1 μ m, and oil factor is 74g/100g, the dispersion zate potential value in water is+and 25mv～+ 27mv.Be made as AHPC-04 type product.
With the waste newsprint is certain regenerated newsprint factory of main raw material, and paper machine speed 480m/min on average produces 48g/m daily
247 tons of newsprints.The paper pulp raw material proportioning reclaims newsprint paper pulp 85% for the homemade deinking of self-control, reclaims blank sheet of paper limit 15%.Organic solvent extract (DCM) average content 2.36% of mixed pulp.Owing to contain the auxiliary agent residue of manufacturing paper with pulp of tiny printing ink, resin and other interpolations of high level in the paper pulp, cause the more serious production quality problems such as obstacle and sheet paper products spot of manufacturing paper with pulp.Use the AHPC-04 type product of manufacturing of the present invention to carry out 30 days continuous production, its production application effect is listed table 5 in.
Talc product is added at twice total addition average out to 9.5kg/ ton slurry respectively at the flow box of joining the stock tank and the workshop section that manufactures paper with pulp of slurrying workshop section.Wherein joining the stock tank addition is 60%～70% of total addition, and all the other add at the flow box position.
Table 5 product of the present invention is used for the effect of regenerated newsprint stickies control
Application result shows, use product of the present invention after, the paper machine making speed of a motor vehicle is brought up to 540m/min by the 480m/min before not using, the newsprint daily output rises to 55 tons by 48 tons.Not only improved output, and DCM content drops to 0.43% by original 1.57% in the plain boiled water, has purified plain boiled water water quality, has prolonged the washing cycle of production equipment, has obviously improved production efficiency.
Claims (5)
1. a composite modified talc product and a manufacture method thereof that is used for the control of pulping and paper-making production process anion stickies is characterized in that the product appearance features is: the white circular cylinder of diameter 6.0mm, high 5.0-10.0mm.Product whiteness (ISO) 80%-93%; Specific area (BET) 〉=15m
2/ g; Oil factor 〉=40.0g/10g; Average grain diameter 1.5-5.0 micron; Maximum particle diameter is less than 15 microns; Moisture 1.0%-5.0%; The water dispersion suspension electric charge of product presents weak cation, and the zate potential value is less than 30mv.
2. talc product as claimed in claim 1 is characterized in that the product essential mineral consists of fineness 800-1500 order, the natural talcum of the flat crystal form of 70%-98%.Composite one or both of natural minerals powders such as bentonite, diatomite in the product, its composite mass percent is respectively: bentonite 2.0%-5.0%, diatomite 10.0%-30.0%.And containing 30-120ppm, molecular weight is the cationic-type polyacrylamide polymer of 500-1200.
3. talc product as claimed in claim 1, the processing that it is characterized in that talc powder body are at first granular less than 5mm through just being crushed to diameter with block talcum raw material, dry grinding to 200 order-500 order fine powder in roller press type or impact grinder.Airflow milling or impact grinder or the pulverizing of vibrations grinding machine through disposing grader again, and classification is 800 order to 1500 purpose superfine powders to fineness.
4. talc product as claimed in claim 1, the composite modifying method that it is characterized in that product is with in the diatomite of the bentonite of 600 order to 1500 purpose superfine talcum powders and 2.0%-5% (to talcum) and 10%-30% (to talcum) one or both, places homogenizer or screw mixer to stir; Spray into simultaneously and be diluted to 0.1%-0.5% concentration in advance, molecular weight is the cationic-type polyacrylamide polymer of 500-1200 ten thousand units, blend; Polyacrylamide polymers is 30-120ppm to the addition of talcum.
5. the white circular cylinder of diameter 6.0mm as claimed in claim 1, high 5.0-10.0mm, the prilling process that it is characterized in that white circular cylinder product are with the granulation to dry method squash type or the roller press type comminutor of the powder conveying after composite modified.Comminutor extrusion die casement amount is: compression end Φ
17.0～8.0mm, h
15～6mm; Transportation section Φ 6.0～7.0mm, H 20.0～22.0mm; Output Φ
26.0～8.0mm, h
224.0～26.0mm.
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102733229A (en) * | 2012-06-28 | 2012-10-17 | 陕西科技大学 | Method for reducing masson pine chemical-mechanical pulp resin content |
| CN102747644A (en) * | 2012-07-20 | 2012-10-24 | 东莞市深联造纸有限公司 | Processing method of paper machine wet end off-machine water |
| CN104878653A (en) * | 2015-06-08 | 2015-09-02 | 陈子明 | Preparation method for recycled paper stickies control agent |
| CN104894915A (en) * | 2015-05-20 | 2015-09-09 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | Papermaking adhesive control agent, and preparation method and application of control agent |
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| CN102733229A (en) * | 2012-06-28 | 2012-10-17 | 陕西科技大学 | Method for reducing masson pine chemical-mechanical pulp resin content |
| CN102747644A (en) * | 2012-07-20 | 2012-10-24 | 东莞市深联造纸有限公司 | Processing method of paper machine wet end off-machine water |
| CN104894915A (en) * | 2015-05-20 | 2015-09-09 | 大唐国际发电股份有限公司高铝煤炭资源开发利用研发中心 | Papermaking adhesive control agent, and preparation method and application of control agent |
| CN104878653A (en) * | 2015-06-08 | 2015-09-02 | 陈子明 | Preparation method for recycled paper stickies control agent |
| CN104878653B (en) * | 2015-06-08 | 2017-01-18 | 陈子明 | Preparation method for recycled paper stickies control agent |
| CN106087528A (en) * | 2016-06-30 | 2016-11-09 | 泉州华祥纸业有限公司 | A kind of regeneration paper stock glue bond thing controlling agent |
| CN110105790A (en) * | 2019-05-06 | 2019-08-09 | 邱振权 | Papermaking filler pretreatment unit and processing method |
| CN110105790B (en) * | 2019-05-06 | 2021-06-29 | 苏州赛维科环保技术服务有限公司 | Papermaking filler pretreatment device and treatment method |
| CN111663364A (en) * | 2020-06-17 | 2020-09-15 | 辽宁艾海滑石有限公司 | Preparation method of wet papermaking coating slurry liquid |
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