CN102604030B - Preparation method for soft porous synthetic paper - Google Patents
Preparation method for soft porous synthetic paper Download PDFInfo
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- CN102604030B CN102604030B CN 201210058973 CN201210058973A CN102604030B CN 102604030 B CN102604030 B CN 102604030B CN 201210058973 CN201210058973 CN 201210058973 CN 201210058973 A CN201210058973 A CN 201210058973A CN 102604030 B CN102604030 B CN 102604030B
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Abstract
The invention discloses a preparation method for soft porous synthetic paper, which mainly includes the steps: proportionally adding diisocyanate, polyester dihydric alcohol, solvent and chain extender into a reactor to undergo a heating reaction so as to obtain thick polyurethane solution; adding a certain amount of solvent to prepare polyurethane solution after cooling, and adding a certain amount of inorganic filler with uniformly stirring and mixing so that mixed solution is obtained; spreading partial mixed solution on release paper, placing the release paper into a dryer for drying, and obtaining a base material for producing the synthetic paper after a film on the release paper is completely dried; and spreading the rest mixed solution on the base material, then immersing the base material into water solution, immediately placing completely solidified mixed solution on the surface into the dryer for forced air drying, stripping the film on the release paper after the film on the release paper is completely dried, and the film is the soft synthetic paper product. The method is low in production energy consumption, and the prepared synthetic paper is porous, soft, quick in ink penetration and easy in drying.
Description
Technical field
[0001] the invention belongs to the composite organic-inorganic material production technical field, be specifically related to a kind of preparation method of soft type synthetic paper of porous.
Background technology
Synthetic paper, the s-generation that is otherwise known as paper.It is to be main raw material with macromolecule resin and inorganic filler, processes the multi-functional matrix material that has plastics and paper feature simultaneously by expressing technique.Synthetic paper is a kind of plastics type material product, has that light specific gravity, intensity are big, anti tear, and printing is good, shading, uvioresistant, characteristics such as durable in use.The production process of synthetic paper is of reduced contamination, is a major reform of modern paper production.Synthetic paper has writing property and the printing effect same with the vegetable fibre paper.Have more the core capabilities that plastic packing article has simultaneously, such as waterproof, protection against the tide, mildew-resistant, insect protected, wear-resisting, folding, fire-retardant etc.
Though synthetic paper is in comparatively environmental protection of whole process of production, but employed macromolecular material (is mainly polyolefins, as polyethylene, polypropylene, polyvinyl chloride etc.) need under the condition of high temperature, (usually at 180 ℃) could realize secondary processing, so energy consumption is higher.In addition, in order to increase the printing ink absorption property of synthetic paper, used a large amount of mineral filler-Paris whites in the synthetic paper, adopt again simultaneously and be squeezed into the comparatively densification of one-piece construction that membrane technique causes synthetic paper, this just makes prepared synthetic paper product exist feel hard partially, the ink marks infiltration is slow, problems such as ink marks length time of drying.Therefore, present synthetic paper product is after the process printing, and ink absorption is slow, needs operations such as airing mostly, has limited its range of application to a certain extent.By above analysis as can be seen, present synthetic paper product mainly exists production energy consumption higher, and the densification of product one-piece construction, feel are hard partially, and blotting waits shortcoming slowly.Therefore must improve the production technology of synthetic paper, could expand its Application Areas.
Summary of the invention
The preparation method who the purpose of this invention is to provide a kind of soft type synthetic paper of porous.This method comprises the step of following order:
(1) component that will comprise 22～26 weight part vulcabond, 1600～4000 weight part polyester diol, 1000～3000 parts by weight solvent was reacted 3 hours down in 80 ℃ in reactor, add 38～59 weight part chainextenders, 133～157 weight part vulcabond again and under 80 ℃, continue reaction 2 hours, obtain the polyurethane solution of thickness then;
(2) then prepared polyurethane solution is cooled to 20～25 ℃, and adding certain amount of solvent, to be mixed with urethane solid masses content be 30% solution, adds the mineral filler of 146～789 weight parts again, stirred 1 hour, mix, obtain mixing solutions;
(3) with the partially mixed solution coat of (2) step gained on separate-type paper, and send into and carry out drying in the baking oven, oven temperature is 70～110 ℃, treat film on the separate-type paper dry fully after, namely obtained the base material of synthetic paper production usefulness;
(4) coat the remainder of (2) step gained mixing solutions on the base material of (3) step gained with certain thickness, together immerse in the aqueous solution then, after the mixing solutions for the treatment of the top layer solidifies fully, send into immediately and carry out forced air drying in the baking oven, oven temperature is 40～50 ℃, treat film on the separate-type paper dry fully after, the film on the separate-type paper is peeled off, according to demand membrane product is cut out again and be suitable dimension, namely obtain the soft type synthetic paper product of porous; Total thickness by adjusting base material and the gauge control synthetic paper of the mixing solutions that applies for the second time is 0.07～0.25mm.
Further, described vulcabond is preferably: at least a in isoflurane chalcone diisocyanate and 4, the 4-dicyclohexyl methane diisocyanate.
Described polyester diol is preferably: at least a in polycaprolactone dibasic alcohol, polyethylene glycol adipate glycol, the poly adipate succinic acid ester glycol, its number average relative molecular mass is 8000～20000.
Described solvent is at least a in dimethyl formamide, the N,N-DIMETHYLACETAMIDE.
Described chainextender is preferably short-chain fat family dibasic alcohol, as 1, and 4 '-butyleneglycol, 1,6-hexylene glycol and 1, at least a in 3 '-propylene glycol.
Described mineral filler is at least a or mixture in light calcium carbonate, water-ground limestone, the calcene, and is that fineness is 500～1500 purpose powder.
In step (2) the gained solution, the ratio between urethane and the mineral filler can change in certain scope, is preferably: the quality percentage composition of urethane is 35%～55%, and the quality percentage composition of mineral filler is 45%～65%.
The synthetic paper outward appearance of preferred gained is white in the inventive method, and thickness is between 0.07～0.25mm, and weight (with A4 paper planimeter) is between 0.95～2.10g.
The present invention compares with existing synthetic paper production technology, has following advantage:
(1) synthetic paper contains vesicular structure and comparatively soft: in the production process of synthetic paper, adopted the operation of the step immersion aqueous solution.In immersing aqueous solution process, solvent and water in the mixing solutions exchange, and make macromolecular material separate out, and film-forming has namely been finished the process of wet method phase inversion film forming; Simultaneously, the inside on film top layer has formed vesicular structure, thereby gives comparatively soft characteristic of synthetic paper.
(2) ink marks quick permeation: the existence of a large amount of pore space structures in the synthetic paper top layer has promoted infiltration and the absorption rate of synthetic paper to ink greatly.Synthetic paper is after printing or writing, and the moisture content meeting rapid osmotic of ink is in the micropore of polyurethane material, and ink molecules also can be adsorbed by mineral filler fast simultaneously, thereby make ink marks rapid drying.
(3) production energy consumption is low: in process of production, need not to carry out secondary processing under 180 ℃ condition, only need carry out drying operation at 70～110 ℃ and 40～50 ℃ and get final product, so energy consumption reduces greatly, be conducive to reduce the production cost of synthetic paper.
Embodiment
The present invention is described in further detail below by concrete experiment embodiment, and wherein, described raw material is industrialization product, and equipment is the production unit of general industryization.
Embodiment 1:
Take by weighing 2.2 kilograms of isoflurane chalcone diisocyanates, 160 kilograms of polycaprolactone dibasic alcohol (molecular weight is 8000), dimethyl formamide double centner and put into reactor, reacted 3 hours down in 80 ℃, add 1 again, 13.3 kilograms of 3.8 kilograms of 3 '-propylene glycol, isoflurane chalcone diisocyanate continue reaction 2 hours down in 80 ℃, obtain the polyurethane solution of thickness; Prepared polyurethane solution is cooled to 25 ℃, and adding 318.4 kilograms dimethyl formamide, to be mixed with urethane solid masses content be 30% solution, adds 147 kilograms light calcium carbonate again, stirs and obtained mixing solutions in 1 hour; 80% of the mixing solutions total amount of gained is coated on the separate-type paper, and is sent into and carry out drying (oven temperature is 70 ℃) in the baking oven, treat film on the separate-type paper dry fully after, namely obtained the base material of synthetic paper production usefulness; Remaining mixing solutions is coated with certain thickness (coating for the second time) on the base material of synthetic paper production usefulness, together immerse in the aqueous solution, after the mixing solutions for the treatment of the top layer solidifies fully, send into immediately and carry out forced air drying (oven temperature is 40 ℃) in the baking oven, treat film on the separate-type paper dry fully after, the film on the separate-type paper is peeled off; Total thickness by adjusting base material and the gauge control film of the mixing solutions that applies for the second time is 0.07mm, according to demand membrane product is cut out at last to be suitable dimension, namely obtains the soft type synthetic paper product of porous.
The quality percentage composition of the polyurethane material of gained synthetic paper is 45.0% in the present embodiment; Mineral filler quality percentage composition is 55.0%.The synthetic paper product colour is white, and thickness is 0.07mm, and quality (with A4 paper planimeter) is 0.95g.
Embodiment 2:
Take by weighing 4,2.6 kilograms of 4-dicyclohexyl methane diisocyanates, 400 kilograms of poly adipate succinic acid ester glycol (molecular weight is 20000), N,N-DIMETHYLACETAMIDE are put into reactor for 300 kilograms, reacted 3 hours down in 80 ℃, add 1 again, 5.9 kilograms of 6 '-hexylene glycols, 4,15.7 kilograms of 4-dicyclohexyl methane diisocyanates continue reaction 2 hours down in 80 ℃, obtain the polyurethane solution of thickness; Then prepared polyurethane solution is cooled to 20 ℃, and adding 689.8 kilograms N,N-DIMETHYLACETAMIDE, to be mixed with urethane solid masses content be 30% solution, adds 787.8 kilograms water-ground limestone again, stirs and obtained mixing solutions in 1 hour; Then 70% of the mixing solutions total amount of gained is coated on the separate-type paper, and is sent into and carry out drying (oven temperature is 110 ℃) in the baking oven, treat film on the separate-type paper dry fully after, namely obtained the base material of synthetic paper production usefulness; At last remaining mixing solutions is coated with certain thickness (coating for the second time) on the base material of synthetic paper production usefulness, together immerse in the aqueous solution, after the mixing solutions for the treatment of the top layer solidifies fully, send into immediately and carry out forced air drying (oven temperature is 50 ℃) in the baking oven, treat film on the separate-type paper dry fully after, the film on the separate-type paper is peeled off; Total thickness by adjusting base material and the gauge control film of the mixing solutions that applies for the second time is 0.25mm, according to demand membrane product is cut out at last to be suitable dimension, namely obtains the soft type synthetic paper product of porous.
The quality percentage composition of the polyurethane material of gained synthetic paper is 35.0% in the present embodiment; Mineral filler quality percentage composition is 65.0%.The synthetic paper product colour is white, and thickness is 0.25mm, and quality (with A4 paper planimeter) is 2.10g.
Embodiment 3:
Take by weighing 4,2.6 kilograms of 4-dicyclohexyl methane diisocyanates, polyethylene glycol adipate glycol 300 kilograms of (molecular weight is 15000), N,N-DIMETHYLACETAMIDEs are put into reactor for 200 kilograms, reacted 3 hours down in 80 ℃, add 1 again, 13.3 kilograms of 4.5 kilograms of 4 '-butyleneglycols, isoflurane chalcone diisocyanate continue reaction 2 hours down in 80 ℃, obtain the polyurethane solution of thickness; Then prepared polyurethane solution is cooled to 22 ℃, and adding 547.6 kilograms dimethyl formamide, to be mixed with urethane solid masses content be 30% solution, adds 480.6 kilograms calcene again, stirs and obtained mixing solutions in 1 hour; Then 80% of the mixing solutions total amount of gained is coated on the separate-type paper, and is sent into and carry out drying (oven temperature is 90 ℃) in the baking oven, treat film on the separate-type paper dry fully after, namely obtained the base material of synthetic paper production usefulness; At last remaining mixing solutions is coated with certain thickness (coating for the second time) on the base material of synthetic paper production usefulness, together immerse in the aqueous solution, after the mixing solutions for the treatment of the top layer solidifies fully, send into immediately and carry out forced air drying (oven temperature is 43 ℃) in the baking oven, treat film on the separate-type paper dry fully after, the film on the separate-type paper is peeled off; Total thickness by adjusting base material and the gauge control film of the mixing solutions that applies for the second time is 0.12mm, according to demand membrane product is cut out at last to be suitable dimension, namely obtains the soft type synthetic paper product of porous.
The quality percentage composition of the polyurethane material of gained synthetic paper is 40.0% in the present embodiment; Mineral filler quality percentage composition is 60.0%.The synthetic paper product colour is white, and thickness is 0.12mm, and quality (with A4 paper planimeter) is 1.40g.
Embodiment 4:
Take by weighing 2.2 kilograms of isoflurane chalcone diisocyanates, polyethylene glycol adipate glycol 340 kilograms of (molecular weight is 17000), N,N-DIMETHYLACETAMIDEs are put into reactor for 260 kilograms, reacted 3 hours down in 80 ℃, add 1 again, 4.5 kilograms of 4 '-butyleneglycols, 4,15.6 kilograms of 4-dicyclohexyl methane diisocyanates continue reaction 2 hours down in 80 ℃, obtain the polyurethane solution of thickness; Then prepared polyurethane solution is cooled to 23 ℃, and it is 30% solution that the dimethyl formamide that adds 585.4 kilograms is mixed with urethane solid masses content, light calcium carbonate and 260.0 kilograms of stearic calcium carbonate of adding 240.3 kilograms again stir and obtained mixing solutions in 1 hour; Then 80% of the mixing solutions total amount of gained is coated on the separate-type paper, and is sent into and carry out drying (oven temperature is 90 ℃) in the baking oven, treat film on the separate-type paper dry fully after, namely obtained the base material of synthetic paper production usefulness; At last remaining mixing solutions is coated with certain thickness (coating for the second time) on the base material of synthetic paper production usefulness, together immerse in the aqueous solution, after the mixing solutions for the treatment of the top layer solidifies fully, send into immediately and carry out forced air drying (oven temperature is 40 ℃) in the baking oven, treat film on the separate-type paper dry fully after, the film on the separate-type paper is peeled off; Total thickness by adjusting base material and the gauge control film of the mixing solutions that applies for the second time is 0.19mm, according to demand membrane product is cut out at last to be suitable dimension, namely obtains the soft type synthetic paper product of porous.
The quality percentage composition of the polyurethane material of gained synthetic paper is 42.0% in the present embodiment; Mineral filler quality percentage composition is 58.0%.The synthetic paper product colour is white, and thickness is 0.19mm, and quality (with A4 paper planimeter) is 1.70g.
Claims (7)
1. the preparation method of the soft type synthetic paper of a porous is characterized in that comprising the step of following order:
(1) component that will comprise 22～26 weight part vulcabond, 1600～4000 weight part polyester diol, 1000～3000 parts by weight solvent was reacted 3 hours down in 80 ℃ in reactor, add 38～59 weight part chainextenders, 133～157 weight part vulcabond again and under 80 ℃, continue reaction 2 hours, obtain the polyurethane solution of thickness then;
(2) then prepared polyurethane solution is cooled to 20～25 ℃, and adding certain amount of solvent, to be mixed with urethane solid masses content be 30% solution, adds the mineral filler of 146～789 weight parts again, stirred 1 hour, mix, obtain mixing solutions;
(3) with the partially mixed solution coat of (2) step gained on separate-type paper, and send into and carry out drying in the baking oven, oven temperature is 70～110 ℃, treat film on the separate-type paper dry fully after, namely obtained the base material of synthetic paper production usefulness;
(4) coat the remainder of (2) step gained mixing solutions on the base material of (3) step gained with certain thickness, together immerse in the aqueous solution then, after the mixing solutions for the treatment of the top layer solidifies fully, send into immediately and carry out forced air drying in the baking oven, oven temperature is 40～50 ℃, treat film on the separate-type paper dry fully after, the film on the separate-type paper is peeled off, according to demand membrane product is cut out again and be suitable dimension, namely obtain the soft type synthetic paper product of porous; Total thickness by adjusting base material and the gauge control synthetic paper of the mixing solutions that applies for the second time is 0.07～0.25mm.
2. the preparation method of the soft type synthetic paper of porous according to claim 1, it is characterized in that: described vulcabond is: at least a in isoflurane chalcone diisocyanate and 4, the 4-dicyclohexyl methane diisocyanate.
3. the preparation method of the soft type synthetic paper of porous according to claim 1 and 2, it is characterized in that: described polyester diol is: at least a in polycaprolactone dibasic alcohol, polyethylene glycol adipate glycol, the poly adipate succinic acid ester glycol, its number average relative molecular mass is 8000～20000.
4. the preparation method of the soft type synthetic paper of porous according to claim 3 is characterized in that: described solvent is at least a in dimethyl formamide, the N,N-DIMETHYLACETAMIDE.
5. the preparation method of the soft type synthetic paper of porous according to claim 4, it is characterized in that: described chainextender is short-chain fat family dibasic alcohol, and described short-chain fat family dibasic alcohol is 1,4-butyleneglycol, 1,6-hexylene glycol and 1, a kind of in the ammediol.
6. the preparation method of the soft type synthetic paper of porous according to claim 5, it is characterized in that: described mineral filler is at least a or mixture in light calcium carbonate, water-ground limestone, the calcene, and is that fineness is 500～1500 purpose powder.
7. the preparation method of the soft type synthetic paper of porous according to claim 6, it is characterized in that: in step (2) the gained solution, ratio between urethane and the mineral filler changes in certain scope, the quality percentage composition of urethane is 35%～55%, and the quality percentage composition of mineral filler is 45%～65%.
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| CN102838796B (en) * | 2012-09-26 | 2014-02-12 | 华东理工大学 | Method for preparing synthetic paper with porous surface |
| CN102977390B (en) * | 2012-12-26 | 2014-06-04 | 湖南科技大学 | Method for preparing collagen-fiber containing polyurethane-based synthetic paper |
| CN104327489A (en) * | 2014-11-26 | 2015-02-04 | 湖南科技大学 | Preparation method of flame-retardant synthetic paper |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPH11107194A (en) * | 1997-10-06 | 1999-04-20 | Oji Paper Co Ltd | Offset-printable synthetic paper |
| JP2004536921A (en) * | 2001-07-25 | 2004-12-09 | エーブリー デニソン コーポレイション | Synthetic paper skin and methods for producing them |
| CN101831167B (en) * | 2010-05-28 | 2011-12-21 | 湖南科技大学 | Method for preparing polyurethane-based stone paper |
| CN102219950B (en) * | 2011-04-27 | 2012-12-26 | 华东理工大学 | Preparation method of highly filled polyethylene synthetic paper |
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