CN113981740A - Composite stone paper and preparation method and application thereof - Google Patents
Composite stone paper and preparation method and application thereof Download PDFInfo
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- CN113981740A CN113981740A CN202111385985.0A CN202111385985A CN113981740A CN 113981740 A CN113981740 A CN 113981740A CN 202111385985 A CN202111385985 A CN 202111385985A CN 113981740 A CN113981740 A CN 113981740A
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- 239000004575 stone Substances 0.000 title claims abstract description 81
- 239000002131 composite material Substances 0.000 title claims abstract description 44
- 238000002360 preparation method Methods 0.000 title abstract description 23
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 69
- 239000000835 fiber Substances 0.000 claims abstract description 61
- 238000003756 stirring Methods 0.000 claims abstract description 51
- 229920001131 Pulp (paper) Polymers 0.000 claims abstract description 49
- 239000004113 Sepiolite Substances 0.000 claims abstract description 22
- 229910052624 sepiolite Inorganic materials 0.000 claims abstract description 22
- 235000019355 sepiolite Nutrition 0.000 claims abstract description 22
- 238000001035 drying Methods 0.000 claims abstract description 14
- 210000002268 wool Anatomy 0.000 claims abstract description 13
- 239000002893 slag Substances 0.000 claims abstract description 9
- 239000011159 matrix material Substances 0.000 claims abstract description 8
- 238000004806 packaging method and process Methods 0.000 claims abstract description 7
- 238000002156 mixing Methods 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims abstract description 5
- 238000005498 polishing Methods 0.000 claims abstract description 4
- 239000000243 solution Substances 0.000 claims description 50
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 24
- 229920002472 Starch Polymers 0.000 claims description 23
- 239000008107 starch Substances 0.000 claims description 23
- 235000019698 starch Nutrition 0.000 claims description 23
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 20
- 238000010438 heat treatment Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 16
- BAPJBEWLBFYGME-UHFFFAOYSA-N Methyl acrylate Chemical compound COC(=O)C=C BAPJBEWLBFYGME-UHFFFAOYSA-N 0.000 claims description 14
- ROOXNKNUYICQNP-UHFFFAOYSA-N ammonium persulfate Chemical compound [NH4+].[NH4+].[O-]S(=O)(=O)OOS([O-])(=O)=O ROOXNKNUYICQNP-UHFFFAOYSA-N 0.000 claims description 14
- 229940037003 alum Drugs 0.000 claims description 12
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 claims description 8
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 claims description 8
- 239000004743 Polypropylene Substances 0.000 claims description 8
- XSQUKJJJFZCRTK-UHFFFAOYSA-N Urea Chemical compound NC(N)=O XSQUKJJJFZCRTK-UHFFFAOYSA-N 0.000 claims description 8
- 239000004202 carbamide Substances 0.000 claims description 8
- 229920005989 resin Polymers 0.000 claims description 8
- 239000011347 resin Substances 0.000 claims description 8
- LCPVQAHEFVXVKT-UHFFFAOYSA-N 2-(2,4-difluorophenoxy)pyridin-3-amine Chemical compound NC1=CC=CN=C1OC1=CC=C(F)C=C1F LCPVQAHEFVXVKT-UHFFFAOYSA-N 0.000 claims description 7
- HRPVXLWXLXDGHG-UHFFFAOYSA-N Acrylamide Chemical compound NC(=O)C=C HRPVXLWXLXDGHG-UHFFFAOYSA-N 0.000 claims description 7
- 229920001807 Urea-formaldehyde Polymers 0.000 claims description 7
- GZCGUPFRVQAUEE-SLPGGIOYSA-N aldehydo-D-glucose Chemical compound OC[C@@H](O)[C@@H](O)[C@H](O)[C@@H](O)C=O GZCGUPFRVQAUEE-SLPGGIOYSA-N 0.000 claims description 7
- 229910001870 ammonium persulfate Inorganic materials 0.000 claims description 7
- 229910052500 inorganic mineral Inorganic materials 0.000 claims description 7
- CHQMHPLRPQMAMX-UHFFFAOYSA-L sodium persulfate Substances [Na+].[Na+].[O-]S(=O)(=O)OOS([O-])(=O)=O CHQMHPLRPQMAMX-UHFFFAOYSA-L 0.000 claims description 7
- PUVAFTRIIUSGLK-UHFFFAOYSA-M trimethyl(oxiran-2-ylmethyl)azanium;chloride Chemical compound [Cl-].C[N+](C)(C)CC1CO1 PUVAFTRIIUSGLK-UHFFFAOYSA-M 0.000 claims description 7
- RRHXZLALVWBDKH-UHFFFAOYSA-M trimethyl-[2-(2-methylprop-2-enoyloxy)ethyl]azanium;chloride Chemical compound [Cl-].CC(=C)C(=O)OCC[N+](C)(C)C RRHXZLALVWBDKH-UHFFFAOYSA-M 0.000 claims description 7
- 239000011259 mixed solution Substances 0.000 claims description 6
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 5
- 125000002091 cationic group Chemical group 0.000 claims description 5
- 239000011707 mineral Substances 0.000 claims description 5
- 229920001778 nylon Polymers 0.000 claims description 5
- -1 polypropylene Polymers 0.000 claims description 5
- 229920001155 polypropylene Polymers 0.000 claims description 5
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 5
- 238000009835 boiling Methods 0.000 claims description 4
- 238000001816 cooling Methods 0.000 claims description 4
- 239000007788 liquid Substances 0.000 claims description 4
- 238000004519 manufacturing process Methods 0.000 claims description 4
- 230000007935 neutral effect Effects 0.000 claims description 4
- 229910052757 nitrogen Inorganic materials 0.000 claims description 4
- 238000010525 oxidative degradation reaction Methods 0.000 claims description 4
- 229920000728 polyester Polymers 0.000 claims description 4
- 230000001105 regulatory effect Effects 0.000 claims description 4
- 244000025254 Cannabis sativa Species 0.000 claims description 2
- 235000012766 Cannabis sativa ssp. sativa var. sativa Nutrition 0.000 claims description 2
- 235000012765 Cannabis sativa ssp. sativa var. spontanea Nutrition 0.000 claims description 2
- 229920000742 Cotton Polymers 0.000 claims description 2
- 235000009120 camo Nutrition 0.000 claims description 2
- 235000005607 chanvre indien Nutrition 0.000 claims description 2
- 239000011487 hemp Substances 0.000 claims description 2
- 239000003999 initiator Substances 0.000 claims description 2
- 229920002522 Wood fibre Polymers 0.000 claims 1
- 238000010009 beating Methods 0.000 description 15
- 239000013055 pulp slurry Substances 0.000 description 11
- 238000003490 calendering Methods 0.000 description 10
- 230000000052 comparative effect Effects 0.000 description 9
- 238000005303 weighing Methods 0.000 description 9
- 239000000463 material Substances 0.000 description 7
- 238000004537 pulping Methods 0.000 description 7
- 238000001914 filtration Methods 0.000 description 5
- 238000012216 screening Methods 0.000 description 5
- 238000000746 purification Methods 0.000 description 4
- 239000002994 raw material Substances 0.000 description 4
- 230000003014 reinforcing effect Effects 0.000 description 4
- 241000196324 Embryophyta Species 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 2
- 230000007797 corrosion Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005189 flocculation Methods 0.000 description 2
- 230000016615 flocculation Effects 0.000 description 2
- 230000000977 initiatory effect Effects 0.000 description 2
- 125000001449 isopropyl group Chemical group [H]C([H])([H])C([H])(*)C([H])([H])[H] 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 239000007800 oxidant agent Substances 0.000 description 2
- 230000001590 oxidative effect Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000000843 powder Substances 0.000 description 2
- 239000002023 wood Substances 0.000 description 2
- RSWGJHLUYNHPMX-UHFFFAOYSA-N Abietic-Saeure Natural products C12CCC(C(C)C)=CC2=CCC2C1(C)CCCC2(C)C(O)=O RSWGJHLUYNHPMX-UHFFFAOYSA-N 0.000 description 1
- 241001391944 Commicarpus scandens Species 0.000 description 1
- KHPCPRHQVVSZAH-HUOMCSJISA-N Rosin Natural products O(C/C=C/c1ccccc1)[C@H]1[C@H](O)[C@@H](O)[C@@H](O)[C@@H](CO)O1 KHPCPRHQVVSZAH-HUOMCSJISA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004061 bleaching Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000004042 decolorization Methods 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000004513 sizing Methods 0.000 description 1
- 238000001179 sorption measurement Methods 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- KHPCPRHQVVSZAH-UHFFFAOYSA-N trans-cinnamyl beta-D-glucopyranoside Natural products OC1C(O)C(O)C(CO)OC1OCC=CC1=CC=CC=C1 KHPCPRHQVVSZAH-UHFFFAOYSA-N 0.000 description 1
- 239000002351 wastewater Substances 0.000 description 1
Classifications
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H27/00—Special paper not otherwise provided for, e.g. made by multi-step processes
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F11/00—Processes for making continuous lengths of paper, or of cardboard, or of wet web for fibre board production, on paper-making machines
-
- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21H—PULP COMPOSITIONS; PREPARATION THEREOF NOT COVERED BY SUBCLASSES D21C OR D21D; IMPREGNATING OR COATING OF PAPER; TREATMENT OF FINISHED PAPER NOT COVERED BY CLASS B31 OR SUBCLASS D21G; PAPER NOT OTHERWISE PROVIDED FOR
- D21H21/00—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties
- D21H21/14—Non-fibrous material added to the pulp, characterised by its function, form or properties; Paper-impregnating or coating material, characterised by its function, form or properties characterised by function or properties in or on the paper
- D21H21/18—Reinforcing agents
Landscapes
- Paper (AREA)
Abstract
The invention relates to the technical field of papermaking, and particularly provides composite stone paper and a preparation method and application thereof. The composite stone paper takes a mixture of sepiolite wool and wood pulp as a matrix, and fibers are uniformly distributed in the matrix. The preparation method comprises the following steps: adding fiber into the dry strength agent and stirring to prepare a solution 1; mixing sepiolite velvet and wood pulp, and uniformly stirring to obtain a solution 2; removing slag and purifying the solution 2, and then adding the solution 1 into the solution 2 while stirring to obtain a solution 3; and (3) feeding the solution 3 to a silk screen to form a wet paper web, squeezing and dehydrating the wet paper web, drying the wet paper web, and performing press polishing to obtain the composite stone paper. In order to solve the problems that the stone paper in the prior art is poor in toughness and poor in bearing capacity as packaging paper, a certain amount of fibers are doped into the stone paper, so that the bearing capacity of the stone paper is improved.
Description
Technical Field
The invention relates to the technical field of papermaking, and particularly provides composite stone paper and a preparation method and application thereof.
Background
The statements herein merely provide background information related to the present disclosure and may not necessarily constitute prior art.
The main raw materials of the traditional paper are plant fibers such as wood, the production of the traditional paper is roughly divided into two basic processes of pulping and papermaking, the pulping process is to dissociate the raw materials into natural color paper pulp or bleached paper pulp, the papermaking process is to prepare the paper pulp fibers suspended in water into satisfactory paper through various processing, however, the traditional paper needs a large amount of wood as the raw materials, and the plant fibers need to be subjected to treatment processes such as cooking, bleaching and the like in the production process, so that a large amount of waste water is generated, the environment is seriously polluted, and the treatment difficulty is extremely high. In addition, conventional paper is not moisture resistant, corrosion resistant, dimensionally stable and has poor physical and mechanical properties, and has not been able to meet the special requirements of many paper applications. Thus, the use of non-plant fiber papermaking technology has developed relatively rapidly in recent years.
The stone paper is a novel material between paper and plastic, and can replace the traditional partial functional paper and professional paper and also replace the traditional most plastic packing materials. And the stone paper has the characteristics of low cost and controllable degradation, can save a large amount of cost for a user, and cannot generate pollution.
However, the inventor finds that the stone paper sold in the market at present has poor toughness and poor bearing capacity particularly when being used as packaging paper, and greatly limits the application of the stone paper.
Disclosure of Invention
Aiming at the problems that the toughness of stone paper is poor and the bearing capacity of the stone paper as packaging paper is poor in the prior art, a certain amount of fibers are doped into the stone paper, so that the bearing capacity of the stone paper is improved.
In one or more embodiments of the invention, a composite stone paper is provided, which uses a mixture of sepiolite wool and wood pulp as a matrix, and fibers are uniformly distributed in the matrix.
In one or some embodiments of the invention, a preparation method of composite stone paper is provided, which comprises the following steps:
adding fiber into the dry strength agent and stirring to prepare a solution 1;
mixing sepiolite velvet and wood pulp, and uniformly stirring to obtain a solution 2;
removing slag and purifying the solution 2, and then adding the solution 1 into the solution 2 while stirring to obtain a solution 3;
and (3) feeding the solution 3 to a silk screen to form a wet paper web, squeezing and dehydrating the wet paper web, drying the wet paper web, and performing press polishing to obtain the composite stone paper.
In one or more embodiments of the invention, the composite stone paper or the product prepared by the preparation method of the composite stone paper is used as packaging paper.
One or some of the above technical solutions have the following advantages or beneficial effects:
1) according to the invention, the fiber is added into the stone paper, so that the toughness of the stone paper is greatly increased, the fiber is added into the dry strength agent and stirred, the fiber is pulled to have side length and is tightly combined with the dry strength agent, so that when the fiber dry strength agent (solution 1) is added into the paper pulp (solution 2), the fiber is uniformly distributed on the stone paper, and simultaneously, the fiber of the stone paper is gathered and contracted, so that each part of the stone paper is more compact, the bearing capacity of the stone paper is improved, and the application of the stone paper is widened.
2) The preparation method of the composite stone paper is simple, has low requirements on equipment and has low process cost.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention.
Aiming at the problems that the toughness of stone paper is poor and the bearing capacity of the stone paper as packaging paper is poor in the prior art, a certain amount of fibers are doped into the stone paper, so that the bearing capacity of the stone paper is improved.
In one or more embodiments of the invention, a composite stone paper is provided, which uses a mixture of sepiolite wool and wood pulp as a matrix, and fibers are uniformly distributed in the matrix.
Preferably, the mass ratio of the sepiolite fibers, the wood pulp and the fibers is 100-: 30-50: 0.8-1.5.
In one or some embodiments of the invention, a preparation method of composite stone paper is provided, which comprises the following steps:
adding fiber into the dry strength agent and stirring to prepare a solution 1;
mixing sepiolite velvet and wood pulp, and uniformly stirring to obtain a solution 2;
removing slag and purifying the solution 2, and then adding the solution 1 into the solution 2 while stirring to obtain a solution 3;
and (3) feeding the solution 3 to a silk screen to form a wet paper web, squeezing and dehydrating the wet paper web, drying the wet paper web, and performing press polishing to obtain the composite stone paper.
Sepiolite wool belongs to non-metallic minerals, is white and looks like a row of white wool bonded together. The stone paper has the characteristics of high temperature resistance, heat preservation, strong adsorption capacity, high decolorization capacity, high thermal stability, high temperature resistance of 1500-1700 ℃, good shape, low shrinkage rate, difficult cracking, high salinity resistance, corrosion resistance and special radiation resistance, so that the stone paper is used as a raw material of the stone paper and is mixed with wood pulp to prepare the stone paper, the consumption of the wood pulp is greatly reduced, the environment is protected, and the manufacturing cost is reduced.
According to the invention, the fiber is added into the stone paper, so that the toughness of the stone paper is greatly increased, the fiber is added into the dry strength agent and stirred, the fiber is pulled to have side length and is tightly combined with the dry strength agent, so that when the fiber dry strength agent (solution 1) is added into the paper pulp (solution 2), the fiber is uniformly distributed on the stone paper, and simultaneously, the fiber of the stone paper is gathered and contracted, so that each part of the stone paper is more compact, the bearing capacity of the stone paper is improved, and the application of the stone paper is widened.
Preferably, the fiber comprises one or more of nylon fiber, polyester fiber, cotton fiber and hemp fiber; the fibers are not easy to break while being elongated, and are suitable for being used as composite stone paper fibers.
Or, the dry strength agent has a mass fraction of 4-7%; if the mass fraction of the dry strength agent is increased and exceeds the mass fraction range, the composite stone paper may become brittle and the strength is reduced, and if the mass fraction of the dry strength agent is reduced and is less than the mass fraction range, the composite stone paper may have uneven fiber distribution.
Or the dry strength agent is a starch-based dry strength agent.
Preferably, the preparation method of the dry strength agent comprises the following steps:
stirring starch, sodium hydroxide, urea and mixed water to obtain a starch mixed solution;
stirring and heating, adding sodium persulfate and 2, 3-epoxypropyl trimethyl ammonium chloride, carrying out oxidative degradation and cationization, reacting to obtain viscous liquid, and regulating the system to be neutral by using hydrochloric acid;
introducing nitrogen, adding acrylamide, methacryloxyethyl trimethyl ammonium chloride, methyl acrylate and initiator ammonium persulfate, heating to react for a period of time, and cooling to obtain the dry strength agent.
Further preferably, the mass ratio of the starch to the sodium hydroxide to the urea is 30:2: 1;
further preferably, the mass ratio of the starch, the sodium hydroxide, the urea, the sodium persulfate, the 2, 3-epoxypropyltrimethylammonium chloride, the acrylamide, the methacryloyloxyethyltrimethylammonium chloride, the methyl acrylate and the ammonium persulfate is 30:2:1:2:4:80:10:2: 6.
Preferably, the preparation method of the dry strength agent comprises the following steps:
stirring and heating the starch solution and the polyvinyl alcohol solution to boiling, adding the cationic polypropylene solution, and continuously stirring to obtain the dry strength agent.
Further preferably, the mass concentration of the starch solution is 5% and the concentration of the polyvinyl alcohol solution is 5%;
further preferably, the cationic polypropylene solution has a mass concentration of 1%.
Preferably, alum is added to solution 3 before the solution 3 is screened; alum can be used to aid in retention and flocculation and control of pitch deposits, which in turn can change the shade and affect the attraction between the wet web and the press roll.
Preferably, the mass ratio of the sepiolite fibers, the wood pulp, the fibers and the alum is 100-: 30-50: 0.8-1.5: 15: 20. if the amount of alum is insufficient, retention and flocculation control of resin deposits cannot be achieved, and if the amount of alum is excessive, it tends to negatively affect sheet strength, wire drainage and fiber bonding, and may even reduce rosin sizing efficiency.
Preferably, the method further comprises adding a resin to the solution 3;
preferably, the resin comprises one or more of urea formaldehyde resin and PP. The resin mainly has the function of binding the inorganic mineral powder to enable the inorganic mineral powder to be molded into paper, and the urea-formaldehyde resin has good curing performance and further improves the molding capability.
Preferably, the mass ratio of the sepiolite fibers, the wood pulp, the fibers and the resin is 100-150: 30-50: 0.8-1.5: 30-50.
Preferably, the sepiolite wool is mixed with the wood pulp at a speed of 600 r/min.
In one or more embodiments of the invention, the composite stone paper or the product prepared by the preparation method of the composite stone paper is used as packaging paper.
Example 1
The embodiment provides a preparation method of composite stone paper, which comprises the following steps:
step 1: preparation of dry strength agent
Starch according to mass ratio: sodium hydroxide: weighing 30:2:1 of urea, adding a certain amount of water, and stirring to obtain a starch mixed solution, wherein the concentration of the starch mixed solution is 5 wt%;
heating to 80 ℃ under stirring, adding an oxidant sodium persulfate with the mass ratio of 2 and 2,3 epoxypropyl trimethyl ammonium chloride with the mass ratio of 4, carrying out oxidative degradation and cationization, reacting for 3-4 hours to obtain viscous liquid, and regulating the pH value of the system to be neutral by using hydrochloric acid;
introducing nitrogen, adding acrylamide: methacryloyloxyethyl trimethyl ammonium chloride: methyl acrylate: initiating agent ammonium persulfate is 80:10:2:6, heating to 85 ℃, reacting for 2 hours, and cooling to 25 ℃ to obtain a dry strength agent;
the above proportions are general proportions, i.e. starch: sodium hydroxide: urea: sodium persulfate: 2,3 epoxypropyltrimethylammonium chloride: acrylamide: methacryloyloxyethyl trimethyl ammonium chloride: methyl acrylate: the ammonium persulfate is 30:2:1:2:4:80:10:2: 6.
Step 2: incorporating reinforcing fibres
And (3) putting 2kg of dry strength agent into water, heating to dissolve the dry strength agent to ensure that the mass concentration of the dry strength agent is 4%, then adding 10g of nylon fiber into the dry strength agent, and uniformly stirring to obtain the fiber dry strength agent.
And step 3: pulping
Weighing 200g of wood pulp and 100kg of water, putting the wood pulp and the 100kg of water into a beating machine for beating, setting the beating degree to be 15.5 DEG SR, and quantifying to be 60.0g/m2Adding 900g of sepiolite wool, and mechanically stirring uniformly at the stirring speed of 600 r/min; screening and purifying the paper material by using a vortex slag remover, adding the dry fiber strength agent obtained in the step (2) and 500g of urea-formaldehyde resin while stirring after purification, and uniformly stirring at 500r/min to obtain paper pulp;
and 4, step 4: paper making
And (3) adding 200g of alum before feeding the paper pulp slurry obtained in the step (3) onto a silk screen, filtering the paper pulp slurry on the silk screen to form a wet paper web, dehydrating the wet paper web by a squeezing part, then drying the wet paper web in a drying part, performing calendaring by a calendaring machine, and finally finishing the finishing to obtain the finished stone paper.
Example 2
The embodiment provides a preparation method of composite stone paper, which comprises the following steps:
step 1: preparation of dry strength agent
Respectively weighing 3.5kg of starch solution with the mass concentration of 5% and polyvinyl alcohol solution with the mass concentration of 5%, stirring and heating until boiling, then adding 16kg of cationic polypropylene solution with the mass concentration of 1%, and continuously stirring for 3 hours to obtain the dry strength agent.
Step 2: incorporating reinforcing fibres
And (3) putting 2kg of dry strength agent into water, heating to dissolve the dry strength agent to ensure that the mass concentration of the dry strength agent is 7%, then adding 10g of polyester fiber into the dry strength agent, and uniformly stirring to obtain the fiber dry strength agent.
And step 3: pulping
Weighing 400g of wood pulp and 100kg of water, putting the wood pulp and the water into a beating machine for beating, setting the beating degree to be 15.5 DEG SR, and setting the quantitative to be 60.0g/m2Then adding 1kg of sepiolite wool, and mechanically stirring uniformly at the stirring speed of 600 r/min; screening and purifying the paper material by using a vortex slag remover, adding the dry fiber strength agent obtained in the step (2) while stirring after purification, adding 450g of urea-formaldehyde resin, and uniformly stirring at 500r/min to obtain paper pulp;
and 4, step 4: paper making
And (3) adding 150g of alum before feeding the paper pulp slurry obtained in the step (3) onto a silk screen, filtering the paper pulp slurry on the silk screen to form a wet paper web, dehydrating the wet paper web by a squeezing part, then drying the wet paper web in a drying part, performing calendaring by a calendaring machine, and finally finishing the finishing to obtain the finished product stone paper.
Example 3
The embodiment provides a preparation method of composite stone paper, which comprises the following steps:
step 1: preparation of dry strength agent for fiber
Putting 2kg of commercially available starch-based dry strength agent into water, heating to dissolve the starch-based dry strength agent to ensure that the mass concentration of the dry strength agent is 7%, then adding 10g of nylon fiber into the dry strength agent, and uniformly stirring to obtain the fiber dry strength agent.
Step 2: pulping
Weighing 200g of wood pulp and 100kg of water, putting the wood pulp and the 100kg of water into a beating machine for beating, setting the beating degree to be 15.5 DEG SR, and quantifying to be 60.0g/m2Adding 900g of sepiolite wool, and mechanically stirring uniformly at the stirring speed of 600 r/min; screening and purifying the paper material by using a vortex slag remover, adding the dry fiber strength agent obtained in the step 1 while stirring after purification, adding 500g of PP resin, and uniformly stirring at 500r/min to obtain paper pulp slurry;
and step 3: paper making
And (3) adding 200g of alum before feeding the paper pulp slurry obtained in the step (2) onto a silk screen, filtering the paper pulp slurry on the silk screen to form a wet paper web, dehydrating the wet paper web by a squeezing part, then drying the wet paper web in a drying part, performing calendaring by a calendaring machine, and finally finishing the finishing to obtain the finished stone paper.
Comparative example 1
The embodiment provides a preparation method of composite stone paper, which comprises the following steps:
step 1: preparation of dry strength agent
Starch according to mass ratio: sodium hydroxide: weighing 30:2:1 of urea, adding a certain amount of water, and stirring to obtain a starch mixed solution, wherein the concentration of the starch mixed solution is 5 wt%;
heating to 80 ℃ under stirring, adding an oxidant sodium persulfate with the mass ratio of 2 and 2,3 epoxypropyl trimethyl ammonium chloride with the mass ratio of 4, carrying out oxidative degradation and cationization, reacting for 3-4 hours to obtain viscous liquid, and regulating the pH value of the system to be neutral by using hydrochloric acid;
introducing nitrogen, adding acrylamide: methacryloyloxyethyl trimethyl ammonium chloride: methyl acrylate: initiating agent ammonium persulfate is 80:10:2:6, heating to 85 ℃, reacting for 2 hours, and cooling to 25 ℃ to obtain a dry strength agent;
the above proportions are general proportions, i.e. starch: sodium hydroxide: urea: sodium persulfate: 2,3 epoxypropyltrimethylammonium chloride: acrylamide: methacryloyloxyethyl trimethyl ammonium chloride: methyl acrylate: the ammonium persulfate is 30:2:1:2:4:80:10:2: 6.
And (3) putting the dry strength agent into water, and heating to dissolve the dry strength agent to ensure that the mass concentration of the dry strength agent is 4%.
Step 2: pulping
Weighing 200g of wood pulp and 100kg of water, putting the wood pulp and the 100kg of water into a beating machine for beating, setting the beating degree to be 15.5 DEG SR, and quantifying to be 60.0g/m2Adding 900g of sepiolite wool, and mechanically stirring uniformly at the stirring speed of 600 r/min; screening and purifying the paper material by using a vortex slag remover, respectively adding 2kg of dry strength agent obtained in the step 1 and 10g of nylon fiber after purification, then adding 500g of urea-formaldehyde resin, and uniformly stirring at 500r/min to obtain paper pulp;
and step 3: paper making
And (3) adding 200g of alum before feeding the paper pulp slurry obtained in the step (2) onto a silk screen, filtering the paper pulp slurry on the silk screen to form a wet paper web, dehydrating the wet paper web by a squeezing part, then drying the wet paper web in a drying part, performing calendaring by a calendaring machine, and finally finishing the finishing to obtain the finished stone paper.
This example differs from example 1 in that the reinforcing fibres are added to step 3 (mixture of wood pulp and sepiolite wool) instead of to the dry strength agent.
Comparative example 2
The embodiment provides a preparation method of composite stone paper, which comprises the following steps:
step 1: preparation of dry strength agent
Respectively weighing 3.5kg of starch solution with the mass concentration of 5% and polyvinyl alcohol solution with the mass concentration of 5%, stirring and heating until boiling, then adding 16kg of cationic polypropylene solution with the mass concentration of 1%, and continuously stirring for 3 hours to obtain the dry strength agent.
Step 2: incorporating reinforcing fibres
And (3) putting 2kg of dry strength agent into water, heating to dissolve the dry strength agent to ensure that the mass concentration of the dry strength agent is 7%, then adding 10g of polyester fiber into the dry strength agent, and uniformly stirring to obtain the fiber dry strength agent.
And step 3: pulping
Weighing 400g of wood pulp and 100kg of water, putting the wood pulp and the water into a beating machine for beating, setting the beating degree to be 15.5 DEG SR, and setting the quantitative to be 60.0g/m2Then adding 1kg of sepiolite wool, and mechanically stirring uniformly at the stirring speed of 600 r/min; adding the dry fiber strength agent obtained in the step 2, screening and purifying paper materials by using a vortex slag separator, adding 450g of urea-formaldehyde resin, and uniformly stirring at 500r/min to obtain paper pulp;
and 4, step 4: paper making
And (3) adding 150g of alum before feeding the paper pulp slurry obtained in the step (3) onto a silk screen, filtering the paper pulp slurry on the silk screen to form a wet paper web, dehydrating the wet paper web by a squeezing part, then drying the wet paper web in a drying part, performing calendaring by a calendaring machine, and finally finishing the finishing to obtain the finished product stone paper.
This example differs from example 2 in that in step 3, the dry strength agent is added in one portion, rather than being stirred with the addition.
Example 4
In this example, the performance of the stone paper prepared by the preparation method of the composite stone paper described in examples 1 to 3 and comparative examples 1 to 2 was tested, and the test results are shown in table 1.
TABLE 1
| Examples | Tensile index Nm/g | Tear index mNm2/g |
| Example 1 | 12.7 | 8.5 |
| Example 2 | 10.8 | 7.4 |
| Example 3 | 11.9 | 8.0 |
| Comparative example 1 | 8.5 | 5.5 |
| Comparative example 2 | 9.2 | 6.2 |
As shown in Table 1, it can be seen from examples 1-3 and comparative examples 1-2 that the composite stone paper prepared in examples 1-3 has stronger tensile strength and tear resistance, but the composite stone paper prepared in example 2 has poorer performance than those of examples 1 and 3, and obviously the dry strength agent in example 2 is not better matched with other parts of the stone paper than the dry strength agents in examples 1 and 3.
The composite stone paper described in comparative example 1 is poor in effect, and obviously, the composite stone paper cannot stretch fibers when the fibers are added into the paper pulp in comparative example 1, so that the tensile strength and the tear resistance of the composite stone paper are poor.
The composite rich mineral paper described in comparative example 2 is poor in effect, and obviously, the performance of the rich mineral paper is greatly influenced by the mixing mode of the solution 1 and the solution 2.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the scope of the present invention, therefore, the present invention is not limited by the appended claims.
Claims (10)
1. The composite stone paper is characterized in that a mixture of sepiolite wool and wood pulp is used as a matrix, and fibers are uniformly distributed in the matrix.
2. The composite rich mineral paper as set forth in claim 1, wherein the mass ratio of sepiolite fibers, wood pulp and fibers is 100-: 30-50: 0.8-1.5.
3. The method for preparing the composite stone paper as claimed in claim 1 or 2, characterized by comprising the following steps:
adding fiber into the dry strength agent and stirring to prepare a solution 1;
mixing sepiolite velvet and wood pulp, and uniformly stirring to obtain a solution 2;
removing slag and purifying the solution 2, and then adding the solution 1 into the solution 2 while stirring to obtain a solution 3;
and (3) feeding the solution 3 to a silk screen to form a wet paper web, squeezing and dehydrating the wet paper web, drying the wet paper web, and performing press polishing to obtain the composite stone paper.
4. The method for preparing the composite stone paper as claimed in claim 3, wherein the fiber comprises one or more of nylon fiber, polyester fiber, cotton fiber and hemp fiber;
or, the dry strength agent has a mass fraction of 4-7%;
or the dry strength agent is a starch-based dry strength agent.
5. The method for preparing the composite stone paper as claimed in claim 3, wherein the method for preparing the dry strength agent comprises the following steps:
stirring starch, sodium hydroxide, urea and mixed water to obtain a starch mixed solution;
stirring and heating, adding sodium persulfate and 2, 3-epoxypropyl trimethyl ammonium chloride, carrying out oxidative degradation and cationization, reacting to obtain viscous liquid, and regulating the system to be neutral by using hydrochloric acid;
introducing nitrogen, adding acrylamide, methacryloxyethyl trimethyl ammonium chloride, methyl acrylate and initiator ammonium persulfate, heating to react for a period of time, and cooling to obtain the dry strength agent.
6. The method for preparing the composite stone paper as claimed in claim 3, wherein the method for preparing the dry strength agent comprises the following steps:
stirring and heating the starch solution and the polyvinyl alcohol solution to boiling, adding the cationic polypropylene solution, and continuously stirring to obtain the dry strength agent.
7. The method for preparing composite stone paper as claimed in claim 3, wherein alum is added to the solution 3 before the solution 3 is screened;
preferably, the mass ratio of the sepiolite fibers, the wood pulp, the fibers and the alum is 100-: 30-50: 0.8-1.5: 15: 20.
8. the method for preparing the composite stone paper as claimed in claim 3, further comprising adding a resin to the solution 3;
preferably, the resin comprises one or more of urea formaldehyde resin and PP.
9. The method for preparing composite rich mineral paper as claimed in claim 3, wherein the sepiolite fine fibers are mixed with the wood pulp at a stirring speed of 600 r/min.
10. Use of the composite stone paper according to claim 1 or 2 or the product obtained by the method for manufacturing the composite stone paper according to any one of claims 3 to 9 as packaging paper.
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Cited By (1)
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| CN115354426A (en) * | 2022-09-06 | 2022-11-18 | 朱财雄 | Preparation method of antibacterial graphene fabric |
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Application publication date: 20220128 |