CN103938485B - The manufacture method of paper - Google Patents
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- CN103938485B CN103938485B CN201410177181.5A CN201410177181A CN103938485B CN 103938485 B CN103938485 B CN 103938485B CN 201410177181 A CN201410177181 A CN 201410177181A CN 103938485 B CN103938485 B CN 103938485B
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Abstract
The invention discloses the manufacture method of a kind of paper, manufacture method includes: NBKP, LBKP and APMP prepare slurry diluted slurry according to a certain percentage；Add the substitution value cationic starch with high substitution degree more than or equal to 0.06 in slurry when the concentration of slurry is 0.4%-1%, wherein the addition of cationic starch with high substitution degree is the 0.01%-2% of oven dry stock；Slurry is made paper.By the way, the present invention can be substantially improved the folding strength of the paper of manufacture.
Description
Technical field
The present invention relates to the manufacturing technology field of field paper, particularly relate to the manufacture method of a kind of paper.
Background technology
The folding strength of paper refers to that paper is when some tension, by its folding certain angle to its rupture time folding times, case processed, box paper using processed and cardboard are had the meaning of particular importance.Along with the lasting lifting of paper industry fibrous raw material quality variation and amount of filler, the folding strength of paper has become a subject matter of restriction paper application.The paper of folding strength difference can cause the Origuchi at the folding position such as leaflet or handbag to burst, thus affecting the attractive in appearance of paper and result of use.The principal element affecting paper folding strength is average fiber length and fiber combining power.
It is, in general, that folding strength can increase along with the raising of beating degree, but fiber combining power (beating degree) is big on the impact of tensile strength not as it on the impact of folding strength.Average fiber length on the impact of folding strength than it on big many of the impact of tensile strength.
Therefore, although some conventional papermaking dry-strengthening agents can significantly improve tensile strength and the bursting strength of paper, but the lifting to paper folding is limited.The method improving folding strength conventional at present is to increase the consumption of softwood pulp, and relative to hardwood pulp and chemi-mechanical pulp, softwood pulp average fiber length is long, and fiber is more soft and is more easy to swollen, and the folding strength promoting paper is all had important meaning by this.But the needle of higher dosage slurry long fibre will also result in the rising of paper roughness, the decline of papermaking formation of sheet simultaneously；It addition, the higher price of needle pulp fibres also can increase the production cost of paper, reduce its market competitiveness.
Accordingly, it is desirable to provide the manufacture method of a kind of paper, to solve the problems referred to above.
Summary of the invention
The technical problem that present invention mainly solves is to provide the manufacture method of a kind of paper, it is possible to solve the technical problem that in prior art, the folding strength of paper is relatively low.
For solving above-mentioned technical problem, the technical scheme that the present invention adopts is: providing the manufacture method of a kind of paper, manufacture method includes: NBKP, LBKP and APMP prepare slurry diluted slurry according to a certain percentage；Add the substitution value cationic starch with high substitution degree more than or equal to 0.06 in slurry when the concentration of slurry is 0.4%-1%, wherein the addition of cationic starch with high substitution degree is the 0.01%-2% of oven dry stock；Slurry is made paper.
Wherein, also include after NBKP, LBKP and APMP are configured according to a certain percentage the step of slurry diluted slurry: in slurry, add filler when the concentration of slurry is 4% successively and substitution value is the Low-substituted Cationic Starch of 0.03, wherein the addition of filler is the 20% of oven dry stock, and the addition of Low-substituted Cationic Starch is the 0.7% of oven dry stock.
Wherein, in slurry, add substitution value when the concentration of slurry is 0.4%-1% also to include more than after the step of the cationic starch with high substitution degree of 0.06: in slurry, add the positive retention agent of 300ppm and the negative retention agent of 3000ppm successively；Positive retention agent is PAMC, and negative retention agent is silicon dioxide gel.
Wherein, cationic starch with high substitution degree and Low-substituted Cationic Starch are prepared through wet processing by starch material.
Wherein, starch material is tapioca, potato starch, corn starch or wheaten starch.
Wherein, cationic starch with high substitution degree is prepared by adding in starch material after etherifying agent carries out high substituted degree etherificate process.
Wherein, etherifying agent is at least one in epoxypropyltrimethylchloride chloride, chloropropyl trimethyl ammonium chloride, dimethyl diallyl ammonium chloride, trichlorine dihydroxy trimethyl ammonium chloride.
Wherein, the substitution value of cationic starch with high substitution degree is more than 0.07.
Wherein, the substitution value of cationic starch with high substitution degree is 0.075.
Wherein, the substitution value of cationic starch with high substitution degree is 0.1.
The invention has the beneficial effects as follows: be different from the situation of prior art, the present invention by adding the substitution value cationic starch with high substitution degree more than or equal to 0.06 when the concentration of slurry is 0.4%-1% in slurry, then this slurry is manufactured paper, relatively the cationic starch of high substituted degree is owing to having the quaternary ammonium group of certain chain length, having the effect of softening agent, therefore paper manufacture method of the present invention can be obviously improved the flexibility of paper and the folding strength of paper of manufacture is substantially improved.
Accompanying drawing explanation
Fig. 1 is the flow chart of the first embodiment of the manufacture method of paper of the present invention；
Fig. 2 is the flow chart of the second embodiment of the manufacture method of paper of the present invention；
Fig. 3 is the flow chart of the 3rd embodiment of the manufacture method of paper of the present invention；
Fig. 4 is the flow chart of the 4th embodiment of the manufacture method of paper of the present invention；
Fig. 5 is the flow chart of the 5th embodiment of the manufacture method of paper of the present invention；
Fig. 6 is the flow chart of the sixth embodiment of the manufacture method of paper of the present invention；
Fig. 7 is the flow chart of the 7th embodiment of the manufacture method of paper of the present invention；
Fig. 8 is the flow chart of the manufacture method of the paper of the present invention the first comparative example；
Fig. 9 is the flow chart of the manufacture method of the paper of the present invention the second comparative example；
Figure 10 is the flow chart of the manufacture method of the paper of the present invention the 3rd comparative example；
Figure 11 is the flow chart of the manufacture method of the paper of the present invention the 4th comparative example；
Figure 12 is the flow chart of the 8th embodiment of the manufacture method of paper of the present invention；
Figure 13 is the flow chart of the 9th embodiment of the manufacture method of paper of the present invention；
Figure 14 is the flow chart of the tenth embodiment of the manufacture method of paper of the present invention；
Figure 15 is the flow chart of the 11st embodiment of the manufacture method of paper of the present invention.
Detailed description of the invention
Below in conjunction with drawings and Examples, the present invention will be described in detail.
Refer to the flow chart of first embodiment that Fig. 1, Fig. 1 are the manufacture methods of paper of the present invention.In the present embodiment, the manufacture method of paper includes:
Step S11: NBKP, LBKP and APMP are prepared according to a certain percentage slurry diluted slurry.
In step s 11, NBKP refers to bleached sulphate softwood pulp, LBKP refers to BRATSK, APMP refers to APMP, NBKP, LBKP and APMP ratio be NBKP:LBKP:APMP=20:60:20, and slurry, certainly in other embodiments can also according to practical situation by other proportions all according to this proportions in following embodiment.
Step S12: adding filler when the concentration of slurry is 4% in slurry successively and substitution value is the Low-substituted Cationic Starch of 0.03, wherein the addition of filler is the 20% of oven dry stock, and the addition of Low-substituted Cationic Starch is the 0.7% of oven dry stock.
Step S13: add the substitution value cationic starch with high substitution degree more than or equal to 0.06 in slurry when the concentration of slurry is 0.4%-1%, wherein the addition of cationic starch with high substitution degree is the 0.01%-2% of oven dry stock.
In step S12 and S13, and in the corresponding steps of following each embodiment, filler is preferably winnofil (PCC), filler can also be grinding calcium carbonate in other embodiments, Pulvis Talci, Kaolin and titanium dioxide etc., oven dry stock refers to only include the oven dry stock of three kinds of compositions of NBKP, LBKP and APMP.Cationic starch with high substitution degree and Low-substituted Cationic Starch are prepared through wet processing by starch material, and wet processing prepares direct gelatinizing after cationic starch is easy to preparation and utilizes.In other embodiments, cationic starch can also adopt dry method or semidry process to prepare.Starch material is tapioca, potato starch, corn starch or wheaten starch, and starch material is preferably tapioca.Cationic starch with high substitution degree is prepared by adding in starch material after etherifying agent carries out high substituted degree etherificate process.Etherifying agent is at least one in epoxypropyltrimethylchloride chloride, chloropropyl trimethyl ammonium chloride, dimethyl diallyl ammonium chloride, trichlorine dihydroxy trimethyl ammonium chloride.In the present embodiment, etherifying agent is preferably trichlorine dihydroxy trimethyl ammonium chloride.The cationic starch of different degree of substitution is prepared by adjusting the consumption of etherifying agent.
Step S14: add the positive retention agent of 300ppm and the negative retention agent of 3000ppm successively in slurry.
In step S14, and in the corresponding steps of following each embodiment, positive retention agent is PAMC (CPAM), negative retention agent is silicon dioxide gel (silica), and positive retention agent and negative retention agent can improve the water filtering performance of slurry and keeping of paper stock.
Step S15: slurry is made paper.
In step S15, and in the corresponding steps of each embodiment below, slurry is manufactured paper with pulp into paper.In other embodiments, it would however also be possible to employ slurry is made paper by other method.
Refer to the flow chart of the second embodiment that Fig. 2, Fig. 2 are the manufacture methods of paper of the present invention.In the present embodiment, the manufacture method of paper includes:
Step S21: NBKP, LBKP and APMP are prepared according to a certain percentage slurry diluted slurry.
Step S22: adding filler when the concentration of slurry is 4% in slurry successively and substitution value is the Low-substituted Cationic Starch of 0.03, wherein the addition of filler is the 20% of oven dry stock, and the addition of Low-substituted Cationic Starch is the 0.7% of oven dry stock.
Step S23: adding substitution value in slurry when the concentration of slurry is 1% is the cationic starch with high substitution degree of 0.075, and wherein the addition of cationic starch with high substitution degree is the 0.01% of oven dry stock.
Step S24: add the positive retention agent of 300ppm and the negative retention agent of 3000ppm successively in slurry.
Step S25: slurry is made paper.
Refer to the flow chart of the 3rd embodiment that Fig. 3, Fig. 3 are the manufacture methods of paper of the present invention.In the present embodiment, the manufacture method of paper includes:
Step S31: NBKP, LBKP and APMP are prepared according to a certain percentage slurry diluted slurry.
Step S32: adding filler when the concentration of slurry is 4% in slurry successively and substitution value is the Low-substituted Cationic Starch of 0.03, wherein the addition of filler is the 20% of oven dry stock, and the addition of Low-substituted Cationic Starch is the 0.7% of oven dry stock.
Step S33: adding substitution value in slurry when the concentration of slurry is 1% is the cationic starch with high substitution degree of 0.075, and wherein the addition of cationic starch with high substitution degree is the 0.3% of oven dry stock.
Step S34: add the positive retention agent of 300ppm and the negative retention agent of 3000ppm successively in slurry.
Step S35: slurry is made paper.
Refer to the flow chart of the 4th embodiment that Fig. 4, Fig. 4 are the manufacture methods of paper of the present invention.In the present embodiment, the manufacture method of paper includes:
Step S41: NBKP, LBKP and APMP are prepared according to a certain percentage slurry diluted slurry.
Step S42: adding filler when the concentration of slurry is 4% in slurry successively and substitution value is the Low-substituted Cationic Starch of 0.03, wherein the addition of filler is the 20% of oven dry stock, and the addition of Low-substituted Cationic Starch is the 0.7% of oven dry stock.
Step S43: adding substitution value in slurry when the concentration of slurry is 1% is the cationic starch with high substitution degree of 0.075, and wherein the addition of cationic starch with high substitution degree is the 0.7% of oven dry stock.
Step S44: add the positive retention agent of 300ppm and the negative retention agent of 3000ppm successively in slurry.
Step S45: slurry is made paper.
Refer to the flow chart of the 5th embodiment that Fig. 5, Fig. 5 are the manufacture methods of paper of the present invention.In the present embodiment, the manufacture method of paper includes:
Step S51: NBKP, LBKP and APMP are prepared according to a certain percentage slurry diluted slurry.
Step S52: adding filler when the concentration of slurry is 4% in slurry successively and substitution value is the Low-substituted Cationic Starch of 0.03, wherein the addition of filler is the 20% of oven dry stock, and the addition of Low-substituted Cationic Starch is the 0.7% of oven dry stock.
Step S53: adding substitution value in slurry when the concentration of slurry is 1% is the cationic starch with high substitution degree of 0.075, and wherein the addition of cationic starch with high substitution degree is the 2.0% of oven dry stock.
Step S54: add the positive retention agent of 300ppm and the negative retention agent of 3000ppm successively in slurry.
Step S55: slurry is made paper.
Refer to the flow chart of sixth embodiment that Fig. 6, Fig. 6 are the manufacture methods of paper of the present invention.In the present embodiment, the manufacture method of paper includes:
Step S61: NBKP, LBKP and APMP are prepared according to a certain percentage slurry diluted slurry.
Step S62: adding filler when the concentration of slurry is 4% in slurry successively and substitution value is the Low-substituted Cationic Starch of 0.03, wherein the addition of filler is the 20% of oven dry stock, and the addition of Low-substituted Cationic Starch is the 0.7% of oven dry stock.
Step S63: adding substitution value in slurry when the concentration of slurry is 1% is the cationic starch with high substitution degree of 0.06, and wherein the addition of cationic starch with high substitution degree is the 0.3% of oven dry stock.
Step S64: add the positive retention agent of 300ppm and the negative retention agent of 3000ppm successively in slurry.
Step S65: slurry is made paper.
Refer to the flow chart of the 7th embodiment that Fig. 7, Fig. 7 are the manufacture methods of paper of the present invention.In the present embodiment, the manufacture method of paper includes:
Step S71: NBKP, LBKP and APMP are prepared according to a certain percentage slurry diluted slurry.
Step S72: adding filler when the concentration of slurry is 4% in slurry successively and substitution value is the Low-substituted Cationic Starch of 0.03, wherein the addition of filler is the 20% of oven dry stock, and the addition of Low-substituted Cationic Starch is the 0.7% of oven dry stock.
Step S73: adding substitution value in slurry when the concentration of slurry is 1% is the cationic starch with high substitution degree of 0.07, and wherein the addition of cationic starch with high substitution degree is the 0.3% of oven dry stock.
Step S74: add the positive retention agent of 300ppm and the negative retention agent of 3000ppm successively in slurry.
Step S75: slurry is made paper.
Refer to the flow chart of manufacture method that Fig. 8, Fig. 8 are the paper of the present invention the first comparative example.In the present embodiment, the manufacture method of paper includes:
Step S81: NBKP, LBKP and APMP are prepared according to a certain percentage slurry diluted slurry.
Step S82: adding filler when the concentration of slurry is 4% in slurry successively and substitution value is the Low-substituted Cationic Starch of 0.03, wherein the addition of filler is the 20% of oven dry stock, and the addition of Low-substituted Cationic Starch is the 0.7% of oven dry stock.
Step S83: add the positive retention agent of 300ppm and the negative retention agent of 3000ppm when the concentration of slurry is 1% successively in slurry.
Step S84: slurry is made paper.
Refer to the flow chart of manufacture method that Fig. 9, Fig. 9 are the paper of the present invention the second comparative example.In the present embodiment, the manufacture method of paper includes:
Step S91: NBKP, LBKP and APMP are prepared according to a certain percentage slurry diluted slurry.
Step S92: adding filler when the concentration of slurry is 4% in slurry successively and substitution value is the Low-substituted Cationic Starch of 0.03, wherein the addition of filler is the 20% of oven dry stock, and the addition of Low-substituted Cationic Starch is the 0.7% of oven dry stock.
Step S93: adding substitution value in slurry when the concentration of slurry is 1% is the Low-substituted Cationic Starch of 0.03, and wherein the addition of Low-substituted Cationic Starch is the 0.01% of oven dry stock.
Step S94: add the positive retention agent of 300ppm and the negative retention agent of 3000ppm successively in slurry.
Step S95: slurry is made paper.
Refer to the flow chart of manufacture method that Figure 10, Figure 10 are the paper of the present invention the 3rd comparative example.In the present embodiment, the manufacture method of paper includes:
Step S101: NBKP, LBKP and APMP are prepared according to a certain percentage slurry diluted slurry.
Step S102: adding filler when the concentration of slurry is 4% in slurry successively and substitution value is the Low-substituted Cationic Starch of 0.03, wherein the addition of filler is the 20% of oven dry stock, and the addition of Low-substituted Cationic Starch is the 0.7% of oven dry stock.
Step S103: adding substitution value in slurry when the concentration of slurry is 1% is the Low-substituted Cationic Starch of 0.03, and wherein the addition of Low-substituted Cationic Starch is the 0.3% of oven dry stock.
Step S104: add the positive retention agent of 300ppm and the negative retention agent of 3000ppm successively in slurry.
Step S105: slurry is made paper.
Refer to the flow chart of manufacture method that Figure 11, Figure 11 are the paper of the present invention the 4th comparative example.In the present embodiment, the manufacture method of paper includes:
Step S111: NBKP, LBKP and APMP are prepared according to a certain percentage slurry diluted slurry.
Step S112: adding filler when the concentration of slurry is 4% in slurry successively and substitution value is the Low-substituted Cationic Starch of 0.03, wherein the addition of filler is the 20% of oven dry stock, and the addition of Low-substituted Cationic Starch is the 0.7% of oven dry stock.
Step S113: adding substitution value in slurry when the concentration of slurry is 1% is the Low-substituted Cationic Starch of 0.055, and wherein the addition of Low-substituted Cationic Starch is the 0.3% of oven dry stock.
Step S114: add the positive retention agent of 300ppm and the negative retention agent of 3000ppm successively in slurry.
Step S115: slurry is made paper.
Refer to the flow chart of the 8th embodiment that Figure 12, Figure 12 are the manufacture methods of paper of the present invention.In the present embodiment, the manufacture method of paper includes:
Step S121: NBKP, LBKP and APMP are prepared according to a certain percentage slurry diluted slurry.
Step S122: adding filler when the concentration of slurry is 4% in slurry successively and substitution value is the Low-substituted Cationic Starch of 0.03, wherein the addition of filler is the 20% of oven dry stock, and the addition of Low-substituted Cationic Starch is the 0.6% of oven dry stock.
Step S123: adding substitution value in slurry when the concentration of slurry is 1% is the cationic starch with high substitution degree of 0.1, and wherein the addition of cationic starch with high substitution degree is the 0.1% of oven dry stock.
Step S124: add the positive retention agent of 300ppm and the negative retention agent of 3000ppm successively in slurry.
Step S125: slurry is made paper.
Refer to the flow chart of the 9th embodiment that Figure 13, Figure 13 are the manufacture methods of paper of the present invention.In the present embodiment, the manufacture method of paper includes:
Step S131: NBKP, LBKP and APMP are prepared according to a certain percentage slurry diluted slurry.
Step S132: adding filler when the concentration of slurry is 4% in slurry successively and substitution value is the Low-substituted Cationic Starch of 0.03, wherein the addition of filler is the 20% of oven dry stock, and the addition of Low-substituted Cationic Starch is the 0.5% of oven dry stock.
Step S133: adding substitution value in slurry when the concentration of slurry is 1% is the cationic starch with high substitution degree of 0.1, and wherein the addition of cationic starch with high substitution degree is the 0.2% of oven dry stock.
Step S134: add the positive retention agent of 300ppm and the negative retention agent of 3000ppm successively in slurry.
Step S135: slurry is made paper.
Refer to the flow chart of the tenth embodiment that Figure 14, Figure 14 are the manufacture methods of paper of the present invention.In the present embodiment, the manufacture method of paper includes:
Step S141: NBKP, LBKP and APMP are prepared according to a certain percentage slurry diluted slurry.
Step S142: adding filler when the concentration of slurry is 4% in slurry successively and substitution value is the Low-substituted Cationic Starch of 0.03, wherein the addition of filler is the 20% of oven dry stock, and the addition of Low-substituted Cationic Starch is the 0.4% of oven dry stock.
Step S143: adding substitution value in slurry when the concentration of slurry is 1% is the cationic starch with high substitution degree of 0.1, and wherein the addition of cationic starch with high substitution degree is the 0.3% of oven dry stock.
Step S144: add the positive retention agent of 300ppm and the negative retention agent of 3000ppm successively in slurry.
Step S145: slurry is made paper.
Refer to the flow chart of the 11st embodiment that Figure 15, Figure 15 are the manufacture methods of paper of the present invention.In the present embodiment, the manufacture method of paper includes:
Step S151: NBKP, LBKP and APMP are prepared according to a certain percentage slurry diluted slurry.
Step S152: add addition is oven dry stock the 20% of filler wherein filler when the concentration of slurry is 4% in slurry successively.
Step S153: adding substitution value in slurry when the concentration of slurry is 1% is the cationic starch with high substitution degree of 0.1, and wherein the addition of cationic starch with high substitution degree is the 0.7% of oven dry stock.
Step S154: add the positive retention agent of 300ppm and the negative retention agent of 3000ppm successively in slurry.
Step S155: slurry is made paper.
The physical property detection that above second embodiment to the 11st embodiment and the first comparative example are correlated with to prepared paper in the 4th comparative example, result is following table one such as:
Table one physical property testing result table
In the first comparative example to the 3rd comparative example, along with the increase of the content of the cationic starch that substitution value is 0.03, the folding strength of paper is always maintained at 12 times, and the folding of paper promotes amplitude and do not change because the content of cationic starch increases.
In the 3rd comparative example and the 4th comparative example, the total content of cationic starch is identical, two comparative examples all contain the cationic starch 0.7% that substitution value is 0.03, additionally, the 3rd comparative example is possibly together with the cationic starch 0.3% that substitution value is 0.03；It is then the cationic starch 0.3% of 0.055 possibly together with substitution value in 4th comparative example.Compared with the 3rd comparative example, the folding strength of the paper of the 4th comparative example is risen to 14 times by 12 times, and it is 16.7% that folding promotes amplitude.It follows that when the total content of cationic starch is constant, along with the substitution value of cationic starch increases, the folding of paper promotes amplitude to be increased to some extent, but, in the 4th comparative example, the folding of paper promotes amplitude and inconspicuous.
3rd comparative example compares with sixth embodiment, and the total content of cationic starch is identical, and both contains the cationic starch 0.7% that substitution value is 0.03；Additionally, the 3rd comparative example is possibly together with the cationic starch 0.3% that substitution value is 0.03；And possibly together with the cationic starch 0.3% that substitution value is 0.06 in sixth embodiment.Compared with the 3rd comparative example, the folding strength of the paper of sixth embodiment is risen to 17 times by 12 times, and it is 41.7% that folding promotes amplitude.As can be seen here, when the substitution value of cationic starch is 0.06, the folding strength of paper has had when being 0.055 than the substitution value of cationic starch and has been obviously improved.Therefore, the cationic starch with high substitution degree defined in the present invention and the substitution value cationic starch more than or equal to 0.06.
3rd comparative example compares with the 7th embodiment, and the total content of cationic starch is identical, and both contains the cationic starch 0.7% that substitution value is 0.03；Additionally, the 3rd comparative example is possibly together with the cationic starch 0.3% that substitution value is 0.03；And possibly together with the cationic starch 0.3% that substitution value is 0.07 in the 7th embodiment.Compared with the 3rd comparative example, the folding strength of the paper of sixth embodiment is risen to 18 times by 12 times, and it is 50% that folding promotes amplitude.
3rd comparative example compares with the 3rd embodiment, and the total content of cationic starch is identical, and both contains the cationic starch 0.7% that substitution value is 0.03；Additionally, the 3rd comparative example is possibly together with the cationic starch 0.3% that substitution value is 0.03；And possibly together with the cationic starch 0.3% that substitution value is 0.075 in sixth embodiment.Compared with the 3rd comparative example, the folding strength of the paper of the 3rd embodiment is risen to 20 times by 12 times, and it is 66.7% that folding promotes amplitude.Contrasted from sixth embodiment, the 7th embodiment and the 3rd embodiment, when when the substitution value of cationic starch with high substitution degree is 0.07, the folding strength of paper is 0.06 relative to the substitution value of cationic starch with high substitution degree, the folding strength of paper is promoted further, and when the substitution value of cationic starch with high substitution degree is 0.075, the folding strength of paper is better than the substitution value of paper when the substitution value of cationic starch with high substitution degree is 0.07.
Can be drawn to the 11st embodiment contrast with the 8th embodiment respectively by the 3rd comparative example, when the total content of cationic starch is identical (total content of above several embodiment cationic starches is 0.7%), along with the content of the Low-substituted Cationic Starch that substitution value is 0.03 is by 0.7%, 0.6%, 0.5%, 0.4% is reduced to 0, when the content of the cationic starch with high substitution degree that substitution value is 0.1 is by 0, 0.1%, 0.2%, 0.3% is increased to 0.7%, compared with the 3rd comparative example, the folding strength of the paper of the 8th～11 embodiments is risen to 15 times respectively by 12 times, 18 times, 22 times and 24 times, folding promotes amplitude and is followed successively by 25%, 50%, 83.3% and 100%.As can be seen here, when cationic starch content is identical, along with the folding strength of the content increase paper of the cationic starch with high substitution degree of identical substitution value promotes therewith.
Further, the first comparative example is compared with the second embodiment to the 5th embodiment, and the content that substitution value is the Low-substituted Cationic Starch of 0.03 is identical, is 0.7%.Along with the cationic starch with high substitution degree content that substitution value is 0.075 is increased to 2.0% by 0,0.01%, 0.3%, 0.7%, compared with the first comparative example, the folding strength of the paper of the second～five embodiment is risen to respectively by 12 times 14 times, 20 times, 26 times and 33 times, and folding promotes amplitude and is followed successively by 16.7%, 66.7%, 117% and 175%.As can be seen here, when Low-substituted Cationic Starch content is identical, along with the folding strength of the content increase paper of the cationic starch with high substitution degree of identical substitution value promotes therewith.
It is different from prior art, the present invention by adding the substitution value cationic starch with high substitution degree more than or equal to 0.06 when the concentration of slurry is 0.4%-1% in slurry, then this slurry is manufactured paper, relatively the cationic starch of high substituted degree is owing to having the quaternary ammonium group of certain chain length, having the effect of softening agent, therefore paper manufacture method of the present invention can be obviously improved the flexibility of paper and the folding strength of paper of manufacture is substantially improved.
The foregoing is only embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the present invention and accompanying drawing content to make or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, all in like manner include in the scope of patent protection of the present invention.
Claims (9)
1. the manufacture method of a paper, it is characterised in that described manufacture method includes:
NBKP, LBKP and APMP are configured to slurry and dilute described slurry；
In described slurry, add filler successively when the concentration of described slurry is 4% and substitution value is the Low-substituted Cationic Starch of 0.03, the addition of wherein said filler is the 20% of oven dry stock, and the addition of described Low-substituted Cationic Starch is the 0.7% of described oven dry stock；
Add the substitution value cationic starch with high substitution degree more than or equal to 0.06 in described slurry when the concentration of described slurry is 0.4%-1%, the addition of wherein said cationic starch with high substitution degree is the 0.01%-2% of oven dry stock；
Described slurry is made paper.
2. manufacture method according to claim 1, it is characterised in that add substitution value when the described concentration at described slurry is 0.4%-1% in described slurry and also include more than after the step of the cationic starch with high substitution degree of 0.06:
The positive retention agent of 300ppm and the negative retention agent of 3000ppm is added successively in described slurry；Described positive retention agent is PAMC, and described negative retention agent is silicon dioxide gel.
3. manufacture method according to claim 1, it is characterised in that described cationic starch with high substitution degree and described Low-substituted Cationic Starch are prepared through wet processing by starch material.
4. manufacture method according to claim 3, it is characterised in that described starch material is tapioca, potato starch, corn starch or wheaten starch.
5. manufacture method according to claim 1, it is characterised in that described cationic starch with high substitution degree is prepared by adding in starch material after etherifying agent carries out high substituted degree etherificate process.
6. manufacture method according to claim 5, it is characterised in that described etherifying agent is at least one in epoxypropyltrimethylchloride chloride, chloropropyl trimethyl ammonium chloride, dimethyl diallyl ammonium chloride, trichlorine dihydroxy trimethyl ammonium chloride.
7. manufacture method according to claim 1, it is characterised in that the substitution value of described cationic starch with high substitution degree is more than 0.07.
8. manufacture method according to claim 7, it is characterised in that the substitution value of described cationic starch with high substitution degree is 0.075.
9. manufacture method according to claim 7, it is characterised in that the substitution value of described cationic starch with high substitution degree is 0.1.
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| US4824523A (en) * | 1983-12-06 | 1989-04-25 | Svenska Traforskningsinstitutet | Method of making paper with high filler content |
| CN1281918A (en) * | 1999-07-27 | 2001-01-31 | 杭州市化工研究所 | High-effective filter and retention aid for straw pulp for making paper |
| CN1887911A (en) * | 2006-07-28 | 2007-01-03 | 武汉科技学院 | Irradition initiating process for preparing cationic starch |
| CN102535240A (en) * | 2012-02-10 | 2012-07-04 | 金华盛纸业（苏州工业园区）有限公司 | Paper pulp and high-bulk energy-saving environment-friendly card prepared from same |
| CN103741543A (en) * | 2012-09-20 | 2014-04-23 | 金东纸业（江苏）股份有限公司 | Starch composition, preparation method thereof and pulp using the starch composition |
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| US4824523A (en) * | 1983-12-06 | 1989-04-25 | Svenska Traforskningsinstitutet | Method of making paper with high filler content |
| CN1281918A (en) * | 1999-07-27 | 2001-01-31 | 杭州市化工研究所 | High-effective filter and retention aid for straw pulp for making paper |
| CN1887911A (en) * | 2006-07-28 | 2007-01-03 | 武汉科技学院 | Irradition initiating process for preparing cationic starch |
| CN102535240A (en) * | 2012-02-10 | 2012-07-04 | 金华盛纸业（苏州工业园区）有限公司 | Paper pulp and high-bulk energy-saving environment-friendly card prepared from same |
| CN103741543A (en) * | 2012-09-20 | 2014-04-23 | 金东纸业（江苏）股份有限公司 | Starch composition, preparation method thereof and pulp using the starch composition |
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