CN1446978A - Padding combination as well as its preparing method and usage - Google Patents
Padding combination as well as its preparing method and usage Download PDFInfo
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- CN1446978A CN1446978A CN 02107945 CN02107945A CN1446978A CN 1446978 A CN1446978 A CN 1446978A CN 02107945 CN02107945 CN 02107945 CN 02107945 A CN02107945 A CN 02107945A CN 1446978 A CN1446978 A CN 1446978A
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Abstract
A composite filler contains SiO2, CaO, Al2O3, SO4, crystal water, Fe2O3, Na2O, and K2O and is prepared from natural silicon metasilicate, magnesium oxide (or carbonate), and surfactant. Its preparing process and its application in making paper are also disclosed.
Description
Technical field
The present invention relates to a kind of fill composition, Preparation Method And The Use relates in particular to a kind of paper grade (stock) fill composition, its preparation method and the application in papermaking.
Background technology
The main raw material of papermaking is a string, and string is woven into a mesh structure in paper, thereby gives paper various performances.For the consumption of saving string and some performance of improving paper, in papermaking, add usually and fill out multiple filler, in the paper-making industry as calcium carbonate, talcum powder, carclazyte (Kaoline) etc.International Patent Application WO 01/44573 discloses by at least a aluminium compound of adding and at least a silicate in paper pulp and has prepared paper products.US5300147 has disclosed the preparation method of the magnesium silicate SLR filler of low-light level, the low-light level paper that contains this filler and this filler and the application in papermaking.
On the other hand, the papermaking industry generally acknowledges, it is very limited that the adding of filler fills out, and every technical indicator severe exacerbation, the especially mechanical strength (as breaking length, tearing strength etc.) that can cause paper filled out in excessive adding.Can influence machine hand plant index and printing performance index in addition.Therefore, common actual retention is 30-35%, and some goods (as newsprint) then are not add substantially to fill out.
Summary of the invention
An object of the present invention is to provide a kind of fill composition, it can add the higher actual retention of filling out in the paper and keeping 75-85% with the higher amount of filling out that adds of 15-50%, and makes every index of paper satisfy related standards simultaneously, and some indexs are optimized.
A further object of the invention provides a kind of method for preparing fill composition.
The present invention has a purpose to provide the purposes of fill composition again.
The invention provides a kind of fill composition, the main chemical composition of said composition is as follows: 44-53 weight portion SiO
2, 36-42 weight portion CaO, 2-3 weight portion MgO, 1-2.3 weight portion Al
2O
3, 3-5.6 weight portion SO
4 2-With the 3-5 weight portion crystallization water.
Fill composition of the present invention also can contain Fe
2O
3, Na
2O and K
2O, its total weight parts is less than 1% of whole composition weight umber.
Fill composition of the present invention mainly by (i) natural calcium metasilicate, (ii) magnesia or magnesium carbonate and (iii) surfactant make, the main chemical composition of described surfactant is as follows: 12-13 weight portion SiO
2, 9-11 weight portion Al
2O
3, 36-38 weight portion SO
4 2-With the 31-38 weight portion crystallization water.Also has Fe in the chemical composition of described surfactant
2O
3, CaO, Na
2O and K
2O, its total weight parts is less than 5.5% of whole surfactant parts by weight.
The raw material of fill composition of the present invention also comprises sericite and/or bentonite.In addition, the present composition also can comprise one or more raw materials that are selected from gypsum, aluminum sodium sulfate, sodium metasilicate, magnesium chloride, zeolite and the polyaluminum sulfate alumina silicate.
Fill composition of the present invention is white powder, its whiteness 〉=85%, and particle mean size is the 2-10 micron, the weight percentage of fibrous particle 〉=75% wherein, the draw ratio of described fibrous particle 〉=10.
The present invention also provides a kind of method for preparing fill composition, and this method may further comprise the steps:
The natural calcium metasilicate of mixed material, magnesia or magnesium carbonate, optional sericite and/or bentonite are milled to fine grained powder in advance;
Surfactant is milled to fine grained powder in advance, and perhaps mixed surfactant and optional one or more raw materials that are selected from gypsum, aluminum sodium sulfate, sodium metasilicate, magnesium chloride, zeolite and the polyaluminum sulfate alumina silicate are milled to fine grained powder in advance;
Above-mentioned two kinds of fine grained powders are mixed, and further to be ground to granularity be the 2-10 micron,
Described surfactant can followingly make: add sulfuric acid solution and carry out acidolysis in aluminium hydroxide, add sodium metasilicate and optional calcium carbonate and/or sodium sulphate and/or potassium sulfate again, fully stir, crystallisation by cooling is also dry.
The present invention also provides the application of fill composition in papermaking.
The present invention also provides the paper products that comprise fill composition of the present invention, for example offset printing paper, art base paper or regenerated newsprint.
Fill composition of the present invention can add the higher actual retention of filling out in the paper and keeping 75-85% with the higher amount of filling out that adds of 15-50%, and makes every index of paper satisfy related standards simultaneously, and some indexs are optimized.This fill composition is applicable to various main paper kinds (as writing paper, printing paper), and its application need not existing paper making equipment and technology are made big adjustment.In addition, fill composition cost of the present invention is lower, and reproducible utilization has no side effect, and the preparation method is simple, is easy to apply.
Description of drawings
Fig. 1 a-1f is the microphoto of reflection fill composition structure of the present invention, and Fig. 1 a illustrates the network structure that the needle-like calcium silicates is formed; Fig. 1 b illustrates the structure of needle-like calcium silicates and bentonite composition; Fig. 1 c illustrates the structure of needle-like calcium silicates and beautiful cloud bentonite composition, and Fig. 1 d illustrates newborn mineral and clusters on needle-like calcium silicates crystal face; Fig. 1 e illustrates nanoscale silicic acid aluminium and invests on the calcium acid stone crystal, and Fig. 1 f illustrates nanoscale silicic acid aluminium beading.
Fig. 2 a-2f is the microphoto of reflection fill composition of the present invention and the fibrous structure of paper, and Fig. 2 a illustrates the structure of paper fiber and calcium silicates composition; Fig. 2 b illustrates the structure that paper fiber and calcium silicates, bentonite are formed; Fig. 2 c illustrates the needle-like calcium silicates and is overlapped to form space between the netted filling paper fiber; The needle-like calcium silicates is shown Fig. 2 d and bentonite is adsorbed on the paper fiber; Fig. 2 e illustrates newborn mineral and clusters on calcium silicates and paper fiber; Fig. 2 f illustrates nanoscale silicic acid aluminium and is adsorbed on the calcium silicates.
Fig. 3 is the X-ray diffractogram of fill composition of the present invention.
Fig. 4 is the ash X-ray diffractogram that contains the paper of fill composition of the present invention.
The specific embodiment
The main chemical composition of fill composition of the present invention is expressed as 44-53 weight portion SiO with oxide form
2, 36-42 weight portion CaO, 2-3 weight portion MgO, 1-2.3 weight portion Al
2O
3, 3-5.6 weight portion SO
4 2-With the 3-5 weight portion crystallization water; Also can contain Fe
2O
3, Na
2O and K
2O, its total weight parts is less than 1% of whole composition weight umber.
The raw material of fill composition of the present invention mainly is (i) natural calcium metasilicate, (ii) magnesia or magnesium carbonate and (iii) surfactant.Natural calcium metasilicate for example can derive from the places of production such as Yunnan Tengchong, Jilin Da Dingshan, Jiangxi be magnanimous, also is commercially available, and the product of Jilin pear tree wollastonite mining industry company commodity big ancient cooking vessel mountain by name board for example, but be not limited thereto.Magnesia among the present invention is meant activated magnesia, and promptly the light calcined magnesia that forms in 600-700 ℃ of low-firing of magnesite (magnesium carbonate) is mainly used in coating, rubber, plastics, papermaking filler (pigment) usually.Described magnesia and magnesium carbonate for example can originate in Dashiqiao, Liaoning Province, for example by the nonmetal company in Dashiqiao, Liaoning product sold.
The main chemical composition of surfactant is 12-13 weight portion SiO
2, 9-11 weight portion Al
2O
3, 36-38 weight portion SO
4 2-With the 31-38 weight portion crystallization water.Also contain Fe in the chemical composition of described surfactant
2O
3, CaO, Na
2O and K
2O, its total weight parts is less than 5.5% of whole surfactant parts by weight.
Fill composition of the present invention also can randomly comprise sericite and/or bentonite; And be selected from one or more raw materials in gypsum, aluminum sodium sulfate, sodium metasilicate, magnesium chloride, zeolite and the polyaluminum sulfate alumina silicate.
Fill composition of the present invention is made by each raw material of mechanical mixture, and as papermaking filler the time, need in fill composition, to add entry, so that composition is through hydrothermal and chemical reaction forms multiple silicate compound, these compounds produce " it the is bonding to flocculate " effect to powder and paper fiber, and become new structural material behind dehydrating and curing.This physical and chemical process makes fill composition of the present invention have higher retention, and keeps higher mechanical strength after becoming paper.
In fill composition of the present invention, natural calcium metasilicate is the fibrous agrregate of natural generation, and after the ultra-fine grinding, granularity is the 2-10 micron, and draw ratio 〉=10 have good elongated fibers characteristic, can partly replace short paper fiber.
In fill composition of the present invention, magnesia or magnesium carbonate are as the dispersant and the retention agent of filler.And normally used in prior art be the organic polymer retention agent.Magnesia or magnesium carbonate can help it to be distributed to paper pulp equably when fill composition is used for papermaking, make this fill composition combine and be difficult to the paper fiber and come off from fiber.Even if carry out secondary making beating, copy paper again and still can keep high retention rate and high evenness.
In fill composition of the present invention, surfactant is retrofited and surface modification to raw materials used, when the hydration process of fill composition, impels the formation of multiple new silicate compound.Surfactant can followingly make: add sulfuric acid solution in aluminium hydroxide, stir 1-2 hour to carry out acidolysis in 70-80 ℃, and then add sodium metasilicate and optional calcium carbonate and/or sodium sulphate and/or potassium sulfate, stirred crystallisation by cooling and drying 30-60 minute in 70-80 ℃.
Adopt the method for mechanical mixture to prepare fill composition of the present invention.The raw material of fill composition of the present invention can be divided into two parts, and first is natural calcium metasilicate, magnesia or magnesium carbonate and optional sericite and bentonite; Second portion is surfactant, optional gypsum, aluminum sodium sulfate, sodium metasilicate, magnesium chloride, zeolite and polyaluminum sulfate alumina silicate.The preparation method of this fill composition mixes the raw material of first and second portion respectively and levigate, and then with two kinds of powder evenly and further to be ground to granularity be the 2-10 micron.
The gained fill composition is white powder, its whiteness 〉=85%, and particle mean size is the 2-10 micron, the weight percentage of fibrous particle 〉=75% wherein, the draw ratio of described fibrous particle (L/D) 〉=10.This fill composition is met water and is heated into netted.
Fill composition of the present invention is compared with the filler of prior art, the Structure Mechanism difference.The filler particles of prior art mostly is sheet, granular (waiting axle, minor axis shape), is filled between the paper fiber with the filling form, and is loosely organized.Thereby with the increase that adds the amount of filling out, the mechanical strength index of gained paper can sharply descend.And shape is fibrous, needle-like outside the main raw material of fill composition of the present invention, is aided with sheet and minor axis shape simultaneously, and it is piled up rationally, is intertwined to form network structure.The powder fibrous reticular structure of the network structure of paper fiber and time one-level forms the Rational structure (referring to Fig. 1) of paper jointly.Fill composition of the present invention has the effect of structural material, therefore adds under the situation of filling out higher, and mechanical strength is declined to a great extent.
The bonding mechanism of fill composition of the present invention and paper fiber also is different from the filler of prior art.The filler of prior art is a kind of physical action with combining of paper fiber, and the applying glue in promptly natural filling and the paper technology is fixed, and its bond strength is limited.And fill composition of the present invention is a kind of physics chemical action of complexity with combining of paper fiber.The filler combination powder makes the strong positive charge of powder granule band under hydrolysis and modifier effect, can combine with the paper fiber of the strong negative electrical charge of band.The polyaluminum sulfate alumina silicate that generates after the powder hydrolysis, zeolite and polyaluminum sulfate alumina silicate have " it is bonding to flocculate " effect to powder and paper fiber.These hyrates dehydrating and curing in the papermaking drying course becomes new structural material (referring to Fig. 2).Above-mentioned physical and chemical process has determined fill composition of the present invention can keep higher retention and wet strength before becoming paper, and still can keep higher mechanical strength after becoming paper.
Further specify the present invention by the following examples.
The preparation of surfactant
In 17.5 gram aluminium hydroxides, add 65.0 gram concentration and be 60% sulfuric acid solution, stir 1 hour carrying out acidolysis in about 70 ℃, and then add 17.3 gram sodium metasilicate, stirred 60 minutes in about 70 ℃, crystallisation by cooling in 100 ℃ of dryings, is pulverized then and is made surfactant 1.
The chemical composition that records surfactant 1 with international complete chemical analysis method is: 13.1 weight portion SiO
2, 10.9 weight portion Al
2O
3, 37.8 weight portion SO
4 2-, the 37.7 weight portion crystallizations water and 0.30 weight portion Fe
2O
3Fe wherein
2O
3Bring by impurities in raw materials used.
Surfactant 2
In 14.8 gram aluminium hydroxides, add 66.0 gram concentration and be 60% sulfuric acid solution, stir 1.5 hours carrying out acidolysis in about 80 ℃, and then add 16 gram sodium metasilicate, stirred 45 minutes in about 80 ℃, crystallisation by cooling in 120 ℃ of dryings, is pulverized then and is made surfactant 2.
The chemical composition that records surfactant 2 with international complete chemical analysis method is: 12.3 weight portion SiO
2, 9.2 weight portion Al
2O
3, 36.3 weight portion SO
4 2-, the 31.2 weight portion crystallizations water and 0.37 weight portion Fe
2O
3Fe wherein
2O
3Bring by impurities in raw materials used.
Surface living-article agent 3
Adding 63.0 gram concentration are 60% sulfuric acid solution in 16.6 gram aluminium hydroxides, stir 2 hours to carry out acidolysis in about 75 ℃, and then add 16.5 the gram sodium metasilicate, 2.5 the gram calcium carbonate, 7.6 the gram sodium sulphate and 5.4 the gram potassium sulfates, stirred 30 minutes in about 75 ℃, crystallisation by cooling, in 150 ℃ of dryings, pulverize then and make surfactant 3.
The chemical composition that records surfactant 3 with international complete chemical analysis method is: 12.5 weight portion SiO
2, 10.3 weight portion Al
2O
3, 36.8 weight portion SO
4 2-, the 35.2 weight portion crystallizations water, 1.4 weight portion CaO, 1.9 weight portion Na
2O, 1.5 weight portion K
2O and 0.35 weight portion Fe
2O
3
The preparation of fill composition
With the natural calcium metasilicate of plastics mixer mixed material 87.0 grams (available from Jilin pear tree wollastonite company, commodity big ancient cooking vessel mountain by name board), 2.6 gram magnesia (available from the nonmetal company in Dashiqiao, Liaoning), be milled to fine grained powder in advance; With C * 132 type ultrafine crushers 10.5 gram surfactants 1 are milled to fine grained powder in advance; With plastics mixer above-mentioned two kinds of fine grained powders are mixed, and further to be ground to particle mean size be 5 microns.
Resulting composition is white powder, and its whiteness is 90%.Record with international complete chemical analysis method, the weight percentage of fibrous particle is 80%, records with the S-530 of HIT type Electronic Speculum, and the draw ratio of fiber grain is 11.With the chemical composition of international complete chemical analysis method measurement said composition powder, the result is 44.3 weight portion SiO
2, 35.9 weight portion CaO, 2.1 weight portion MgO, 1.1 weight portion Al
2O
3, 2.9 weight portion SO
4 2-, the 3.2 weight portion crystallizations water and 0.3 weight portion Fe
2O
3
Embodiment 2
With the natural calcium metasilicate of plastics mixer mixed material 80.0 grams (available from Jilin pear tree wollastonite company, commodity big ancient cooking vessel mountain by name board), 4.0 gram magnesium carbonate (available from the nonmetal company in Dashiqiao, Liaoning), be milled to fine grained powder in advance; With C * 132 type ultrafine crushers 14 gram surfactants 2 are milled to fine grained powder in advance; With plastics mixer above-mentioned two kinds of fine grained powders are mixed, and further to be ground to particle mean size be 2 microns.
Resulting composition is white powder, and its whiteness is 88%.Record with international complete chemical analysis method, the weight percentage of fibrous particle is 75%, records with the S-530 of HIT type Electronic Speculum, and the draw ratio of fiber grain is 11.With the chemical composition of international complete chemical analysis method measurement said composition powder, the result is 53.2 weight portion SiO
2, 41.8 weight portion CaO, 2.9 weight portion MgO, 2.3 weight portion Al
2O
3, 5.5 weight portion SO
4 2-, the 4.8 weight portion crystallizations water and 0.4 weight portion Fe
2O
3
Restrain natural calcium metasilicate (available from Jilin pear tree wollastonite company with plastics mixer mixed material 74.0, commodity big ancient cooking vessel mountain by name board), 2.8 gram magnesium carbonate (available from the nonmetal company in Dashiqiao, Liaoning), 1.0 gram sericites (originating from the Ganluo, Sichuan) and 1.0 gram bentonites (available from the double-current bentonite powder in Sichuan factory) are milled to fine grained powder in advance; Mix 15 gram surfactants 3 and 0.4 gram gypsum, 0.2 gram aluminum sodium sulfate, 0.2 gram sodium metasilicate, 0.2 gram magnesium chloride, 0.6 gram zeolite and 4.0 gram polyaluminum sulfate alumina silicate and be milled to fine grained powder in advance with plastics mixer; With plastics mixer above-mentioned two kinds of fine grained powders are mixed, and further to be ground to granularity be 10 microns.
Resulting composition is white powder, and its whiteness is 85%.Record with international complete chemical analysis method, the weight percentage of fibrous particle is 78%, records with the S-530 of HIT type Electronic Speculum, and the draw ratio of fiber grain is 10.With the chemical composition of international complete chemical analysis method measurement said composition powder, the result is 49.9 weight portion SiO
2, 38.2 weight portion CaO, 2.2 weight portion MgO, 1.5 weight portion Al
2O
3, 4.4 weight portion SO
4 2-, the 4.3 weight portion crystallizations water, 0.3 weight portion Fe
2O
3, 0.2 weight portion Na
2O and 0.05 weight portion K
2O.
Papermaking and test
The fill composition of gained is used for papermaking, and the gained paper is tested.
Fill composition is wanted earlier slurrying when being used for papermaking, promptly add in the fill composition with 4 times the clean water that papermaking requires that meets, and is heated to 50 ℃ and stirred 40 minutes, and keeping pH value is 7-8, can regulate the pH value by adding aluminum sulfate or NaOH.
Conventional papermaking process flow is pulp beating → size mixing → dilute → a copy paper, when sizing mixing, add the fill composition slurries that as above make, paper technology is made offset printing paper, art base paper and newsprint routinely again, measures the key technical indexes of gained paper.
Offset printing paper
The fill composition of embodiment 1 is used for making 70g/m
2Offset printing paper, products material is softwood pulp (30 weight %), bagasse pulp (30 weight %) and fill composition (40 weight %), the testing result of gained paper sees the following form.
| Test item | Unit | Product standard (QB1012-91) B level | Assay |
| Quantitatively | ??g/m 2 | ????70±3 | ????68.1 |
| Moisture | ??％ | ????4-9 | ????5.6 |
| Tightness | ??g/m 3 | ????≤0.8 | ????0.8 |
| Whiteness | ??％ | ????≥82 | ????85.1 |
| Fracture length (in length and breadth) | ??M | ????≥2200 | ????3168 |
| Horizontal folding strength | Inferior | ????≥5 | ????22 |
| Smoothness (positive and negative) | ??S | ????≥40 | ????44 |
| Opacity | ??％ | ????≥82 | ????90.1 |
| Bursting strength (Cobb value) | ??g/m 2 | ????≤30 | ????22.2 |
| Surface strength (positive and negative) | ??M/S | 〉=1.0 (low sticking oil) | ????2.32 |
| Dirt count (0.5-1.5mm) 2 | Individual/m 2 | ????≤120 | ????70 |
| Ash | ??％ | ????-- | ????31.6 |
Art base paper
The fill composition of embodiment 2 is used for making 70g/m
2Art base paper, products material is softwood pulp (30 weight %), hardwood pulp (30 weight %) and fill composition (40 weight %), the testing result of gained paper sees the following form.
| Test item | Unit | Product standard (QB1012-91) B level | Assay |
| Quantitatively | ??g/m 2 | ??70±5 | ????68.5 |
| Moisture | ??％ | ??5-8 | ????5.5 |
| Tightness | ??g/m 3 | ??≤0.80 | ????≤0.73 |
| Whiteness | ??％ | ??≥85 | ????89.2 |
| Fracture length (indulging) | ??M | ??≥2530 | ????2820 |
| Tear index | ??MN.m 2/g | ??≥6.0 | ????6.8 |
| Smoothness (positive and negative) | ??S | On average 〉=17 | ????42 |
| The smoothness positive and negative difference | ??％ | ??≤30 | ????27 |
| Opacity | ??％ | ????84.8 | |
| Surface strength positive and negative (in sticking oil) | ??M/S | On average 〉=7.0 | ????8.6 |
| Bursting strength (Cobb value) | ??g/m 2 | ??20±5.0 | ????22.5 |
| Ash | ??％ | ??-- | ????31.8 |
With the gained art base paper routinely technology be coated with pilot production, the result shows, satisfies and produces every process conditions, produces qualified art paper.
Regenerated newsprint
The fill composition of embodiment 3 is used for making 45g/m
2Regenerated newsprint, products material is softwood pulp (15 weight %), regenerated newsprint slurry (65 weight %) and a fill composition (20 weight %), the testing result of gained paper sees the following form.
| Test item | Unit | Product standard (QB1012-91) A level | Assay |
| Quantitatively | ????g/m 2 | ??45±2 | ????45.8 |
| Fracture length | ????m | ??3200 | ????3260 |
| Tearability | ????MN | ??230 | ????280 |
| Smoothness | ????S | ??40 | ????43.6 |
| Whiteness | ????％ | ??52 | ????65.9 |
| Dirt count | Individual/m 2(0.5-4mm) | ??72 | ????74 |
| Opacity | ????％ | ??≥90 | ????92.5 |
| Moisture | ????％ | ??6-10 | ????7.95 |
| Folding strength | Inferior | ??-- | ????8 |
| Degree of sizing | ????mm | ??-- | ????0.25 |
| Ash | ????％ | ??-- | ????15.35 |
Carry out printability test with high-speed press, the result shows and traditional newsprint (51g/m
2) compare, quantitatively reducing, whiteness increases, and absorbency is good, and printing writing and picture are clear, do not find any print through phenomenon and fall hair and fall grey phenomenon.Every index all reaches the A grade standard.
Fig. 3 and Fig. 4 show the X-ray diffractogram of the fill composition of the present invention and the ash of the paper that contains said composition respectively, and as seen both are consistent.
By above-mentioned assay as seen, paper add fill out fill composition of the present invention after, mechanical strength (as fracture length, tearability, tear index, folding strength) exceeds listed product standard.The papermaking industry is known, and the adding of filler fills out and can the mechanical strength of paper be exerted an influence, especially add the amount of filling out and can reduce mechanical strength greatly when big, this also be in the prior art paper add not high reason of the amount of filling out.Use fill composition of the present invention then can not produce this problem.In general, the ash value descends hardly at the mechanical strength that shows paper below 20%.By above experimental data as seen, the ash value in the regenerated newsprint is below 20%.The ash value of offset printing paper and art base paper shows to be added by filler and fills out the mechanical strength that caused and descend seldom about 30%.
In addition, indexs such as whiteness, opacity, smoothness, dirt count and absorbency all have clear improvement.In addition, fill composition of the present invention has good purification paper making water effect, and is easy to use, nontoxic and safe and reliable.
Filler combination powder of the present invention has higher whiteness (usually greater than 85%), powder is in hydration process, the nanoscale of newly-generated high whiteness (usually greater than 92%) or the positively charged particulate of Subnano-class are attracted on paper fiber and the filler powder, and be coated on more equably on filler and the paper fiber, coat 1/2 λ of thickness less than visible light, these particulates show as the weak low scattering that absorbs to the visible light ripple, strong reflection and produce " physics bleaching " effect produces the effect brighten to paper pulp.Because product has higher refractive index and certain fineness, therefore can improve the opacity of paper by means of " light scattering mechanism ".The particulate filler can also improve smoothness, tightness, gas permeability, blotting oiliness and minimizing " dry linting the falls hair " phenomenon of paper.
Fill composition of the present invention can also increase the opacity of paper.Opacity depends on the number of each particle in the paper and these particles and the surrounding medium refractive index to light.Filler to add the amount of filling out high more, granularity is thin more, opacity is just high more.
In addition, the durability height of fill composition of the present invention.Copying the paper retention after the making beating of filler combination powder secondary and three making beating still can be up to more than 70%, and this helps to make full use of and economize on resources.
Claims (12)
1. fill composition, the main chemical composition of said composition is as follows: 44-53 weight portion SiO
2, 36-42 weight portion CaO, 2-3 weight portion MgO, 1-2.3 weight portion Al
2O
3, 3-5.6 weight portion SO
4 2-With the 3-5 weight portion crystallization water.
2. composition as claimed in claim 1 is characterized in that said composition also contains Fe
2O
3, Na
2O and K
2O, its total weight parts is less than 1% of whole composition weight umber.
3. composition as claimed in claim 1 or 2, it is characterized in that said composition mainly by (i) natural calcium metasilicate, (ii) magnesia or magnesium carbonate and (iii) surfactant make, the main chemical composition of described surfactant is as follows: 12-13 weight portion SiO
2, 9-11 weight portion Al
2O
3, 36-38 weight portion SO
4 2-With the 31-38 weight portion crystallization water.
4. composition as claimed in claim 3 is characterized in that also having Fe in the chemical composition of described surfactant
2O
3, CaO, Na
2O and K
2O, its total weight parts is less than 5.5% of whole surfactant parts by weight.
5. composition as claimed in claim 3 is characterized in that the raw material of said composition also comprises sericite and/or bentonite.
6. composition as claimed in claim 3 is characterized in that said composition also comprises one or more raw materials that are selected from gypsum, aluminum sodium sulfate, sodium metasilicate, magnesium chloride, zeolite and the polyaluminum sulfate alumina silicate.
7. composition as claimed in claim 1 or 2 is characterized in that said composition is white powder, its whiteness 〉=85%.
8. composition as claimed in claim 1 or 2, the particle mean size that it is characterized in that said composition is the 2-10 micron, the weight percentage of fibrous particle 〉=75% wherein, the draw ratio of described fibrous particle 〉=10.
9. method for preparing fill composition, this method may further comprise the steps:
The natural calcium metasilicate of mixed material, magnesia or magnesium carbonate, optional sericite and/or bentonite are milled to fine grained powder in advance;
Surfactant is milled to fine grained powder in advance, and perhaps mixed surfactant and optional one or more raw materials that are selected from gypsum, aluminum sodium sulfate, sodium metasilicate, magnesium chloride, zeolite and the polyaluminum sulfate alumina silicate are milled to fine grained powder in advance;
Above-mentioned two kinds of fine grained powders are mixed, and further to be ground to granularity be the 2-10 micron,
Described surfactant can followingly make: add sulfuric acid solution and carry out acidolysis in aluminium hydroxide, add sodium metasilicate and optional calcium carbonate and/or sodium sulphate and/or potassium sulfate again, fully stir, crystallisation by cooling is also dry.
10. as each described fill composition application in papermaking among the claim 1-8.
11. comprise the paper products of each described fill composition among the claim 1-8.
12. paper products as claimed in claim 11 is characterized in that described paper products are offset printing paper, art base paper or regenerated newsprint.
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|---|---|---|---|
| CNB021079455A CN100398746C (en) | 2002-03-22 | 2002-03-22 | Padding combination as well as its preparing method and usage |
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|---|---|---|---|
| CNB021079455A CN100398746C (en) | 2002-03-22 | 2002-03-22 | Padding combination as well as its preparing method and usage |
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|---|---|
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| CN100398746C CN100398746C (en) | 2008-07-02 |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102414026A (en) * | 2009-04-23 | 2012-04-11 | 惠普开发有限公司 | Coated print media and method for making the same |
| CN102433795A (en) * | 2011-10-20 | 2012-05-02 | 国能纸业有限公司 | Papermaking filler and pretreatment method thereof |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3642511A (en) * | 1968-10-10 | 1972-02-15 | Morris I Cohn | Method of treating wollastonite with acid and the pigment product formed thereby |
| JP2909519B2 (en) * | 1991-03-01 | 1999-06-23 | 宇部興産株式会社 | Method for producing surface-treated inorganic filler |
| CN1079463C (en) * | 2000-01-31 | 2002-02-20 | 四川宏达(集团)有限公司 | High-whiteness low-weight newsprinting paper and its production method |
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2002
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102414026A (en) * | 2009-04-23 | 2012-04-11 | 惠普开发有限公司 | Coated print media and method for making the same |
| CN102414026B (en) * | 2009-04-23 | 2014-01-22 | 惠普开发有限公司 | Coated print media and method for making the same |
| US9944106B2 (en) | 2009-04-23 | 2018-04-17 | Hewlett-Packard Development Company, L.P | Coated print media and method for making the same |
| US10166805B2 (en) | 2009-04-23 | 2019-01-01 | Hewlett-Packard Development Company, L.P. | Coated print media and method for making the same |
| CN102433795A (en) * | 2011-10-20 | 2012-05-02 | 国能纸业有限公司 | Papermaking filler and pretreatment method thereof |
| CN102433795B (en) * | 2011-10-20 | 2013-09-11 | 国能纸业有限公司 | Papermaking filler and pretreatment method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100398746C (en) | 2008-07-02 |
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