CN102877366A - Method for preparing wet curtain paper - Google Patents
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- CN102877366A CN102877366A CN2012103710484A CN201210371048A CN102877366A CN 102877366 A CN102877366 A CN 102877366A CN 2012103710484 A CN2012103710484 A CN 2012103710484A CN 201210371048 A CN201210371048 A CN 201210371048A CN 102877366 A CN102877366 A CN 102877366A
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Abstract
The invention provides a method for preparing wet curtain paper. The method includes the steps: mixing phenolic resin, melamine formaldehyde resin or urea resin with resorcinol aldehyde resin and water to obtain resin water solution; and dipping paper in the resin water solution and then sequentially pressing corrugation, forming and solidifying to obtain the wet curtain paper. The resorcinol aldehyde resin is added into thermosetting resin such as the phenolic resin, the method is applied to production of the wet curtain paper, and the prepared wet curtain paper has fine water absorptivity and tenacity without affecting normal production. In addition, the method for preparing the wet curtain paper is beneficial to reduction of production energy consumption and suitable for large-scale industrial production, production efficiency is improved, and production cost is reduced.
Description
Technical field
The present invention relates to wet curtain equipment technical field, particularly a kind of preparation method of wet curtain paper.
Background technology
Wet curtain paper, another name cascade paper is honeycomb.Wet curtain paper has the performance characteristics such as high-hydroscopicity and high strength, is the needed important composition parts of various wet curtain equipment, as can be used for cooling system, humidification system and filtration system etc.
At present, the production procedure of wet curtain paper is roughly: with the paper impregnated phenolic resin aqueous solution, more repressed corrugation, typing is cured under temperature is 150 ℃ ~ 180 ℃ condition at last, obtains wet curtain paper.
But the water imbibition of the wet curtain paper of above-mentioned conventional method preparation is relatively poor, and fragility is excessive and toughness is little, is unfavorable for the extensive use of wet curtain paper and is not easy to processing.
Summary of the invention
In order to solve above technical problem, the invention provides a kind of preparation method of wet curtain paper, the wet curtain paper of the method preparation has preferably water imbibition and toughness.
The invention provides a kind of preparation method of wet curtain paper, may further comprise the steps:
Phenolic resins, melamine resin or Lauxite are mixed with resorcinol air aldehyde resin, water, obtain resin aqueous solution;
Paper is flooded described resin aqueous solution, and more successively repressed corrugation, typing, curing obtains wet curtain paper.
Preferably, the mass ratio of described phenolic resins, melamine resin or Lauxite and described resorcinol air aldehyde resin is 1:0.01 ~ 1.0.
Preferably, the mass ratio of described phenolic resins, melamine resin or Lauxite and described resorcinol air aldehyde resin is 1:0.05 ~ 0.5.
Preferably, described resorcinol air aldehyde resin is resorcinol formaldehyde resin, resorcinol acetaldehyde resin or resorcinol propionic aldehyde resin.
Preferably, the weight average molecular weight of described resorcinol air aldehyde resin is 300 ~ 800; The solid content of described resorcinol air aldehyde resin is 45% ~ 55%.
Preferably, the mass ratio of described resorcinol air aldehyde resin and described water is 1:2 ~ 4.
Preferably, the mass ratio of described phenolic resins, melamine resin or Lauxite and described water is 1:2 ~ 4.
Preferably, the temperature of described mixing is 5 ℃ ~ 40 ℃.
Preferably, carry out under the described condition that is blended in stirring, the time of described stirring is not less than 10min.
Preferably, the temperature of described curing is 150 ℃ ~ 180 ℃, and the time of described curing is 10min ~ 25min.
Compared with prior art, the present invention mixes phenolic resins, melamine resin or Lauxite with resorcinol air aldehyde resin, water, obtain resin aqueous solution; Then adopt described resin aqueous solution impregnate paper, more successively repressed corrugation, typing, curing obtains wet curtain paper.The present invention adopts the resorcinol air aldehyde resin to mix with the above-mentioned thermosetting resins such as phenolic resins for wet curtain paper, the resin compound that adds the resorcinol air aldehyde resin still has thermosetting and water-soluble preferably more than 4 times, when being applied to the production of wet curtain paper, when not affecting normal production, can make the wet curtain paper of preparation have preferably water imbibition and toughness.Experimental result shows, adopts preparation method provided by the invention to prepare wet curtain paper, and when its flexibility was 15 °, deflection can reach 110mN; The bursting strength of the wet curtain paper of gained can reach 200kPa; Water imbibition can reach 260% relatively.
The specific embodiment
In order further to understand the present invention, below in conjunction with embodiment the preferred embodiment of the invention is described, but should be appreciated that these describe just as further specifying the features and advantages of the present invention, rather than to the restriction of claim of the present invention.
The invention provides a kind of preparation method of wet curtain paper, may further comprise the steps:
Phenolic resins, melamine resin or Lauxite are mixed with resorcinol air aldehyde resin, water, obtain resin aqueous solution;
Paper is flooded described resin aqueous solution, and more successively repressed corrugation, typing, curing obtains wet curtain paper.
The present invention adopts the mixture of resorcinol air aldehyde resin and phenolic resins, melamine resin or Lauxite to produce used resin as wet curtain paper, water imbibition and the toughness of the wet curtain paper of preparation are significantly improved, and be beneficial to and save produce power consumption, enhance productivity, reduce production costs.
The present invention adds phenolic resins, melamine resin or Lauxite and resorcinol air aldehyde resin in the container, adds entry and mixes, and obtains resin aqueous solution.
In wet curtain paper was produced, thermosetting resin commonly used was heat cured phenolic resins, and had water-soluble preferably more than 4 times, did not affect the application of resin, and the performances such as mechanical strength can be provided for paper after the curing.In the present invention, heat cured melamine resin or heat cured Lauxite all can replace described phenolic resins for the preparation of wet curtain paper, and preferred phenolic resins or melamine resin make the quality of wet curtain paper of preparation better.Wet curtain paper generally needs water to dilute with resin, and the mass ratio of described phenolic resins, melamine resin or Lauxite and described water is preferably 1:2 ~ 4, more preferably 1:2.5 ~ 3.5.The weight average molecular weight of described phenolic resins, melamine resin or Lauxite is preferably 200 ~ 500, and more preferably 300 ~ 400; The solid content of described phenolic resins, melamine resin or Lauxite is preferably 45% ~ 55%, and more preferably 47% ~ 53%.
The present invention adopts the resorcinol air aldehyde resin to mix with the above-mentioned thermosetting resins such as phenolic resins for wet curtain paper, the resin compound that adds the resorcinol air aldehyde resin still has thermosetting and water-soluble preferably more than 4 times, when being applied to the production of wet curtain paper, when not affecting normal production, can make the wet curtain paper of preparation have preferably water imbibition and toughness.
Described resorcinol air aldehyde resin, is generated as under NaOH, potassium hydroxide, barium hydroxide or the magnesian effect polycondensation reaction occuring at base catalyst by resorcinol and aldehyde compound.In the present invention, described resorcinol air aldehyde resin is preferably resorcinol formaldehyde resin, resorcinol acetaldehyde resin or resorcinol propionic aldehyde resin, more preferably resorcinol formaldehyde resin.The weight average molecular weight of described resorcinol air aldehyde resin is preferably 300 ~ 800, and more preferably 400 ~ 600; The solid content of described resorcinol air aldehyde resin is preferably 45% ~ 55%, and more preferably 47% ~ 53%.
The present invention with described phenolic resins, melamine resin or Lauxite with described resorcinol air aldehyde resin, when described water mixes, the mass ratio of described phenolic resins, melamine resin or Lauxite and described resorcinol air aldehyde resin is preferably 1:0.01 ~ 1.0, more elects 1:0.05 ~ 0.5 as.The mass ratio of described resorcinol air aldehyde resin and described water is preferably 1:2 ~ 4, more preferably 1:2.5 ~ 3.5.The temperature of described mixing is preferably 5 ℃ ~ 40 ℃, more preferably 20 ℃ ~ 30 ℃; Described mixing is preferably carried out under the condition that stirs, and the time of described stirring preferably is not less than 10min.
After obtaining resin aqueous solution, the present invention is with its impregnate paper, and more successively repressed corrugation, typing, curing after the preferred oven dry obtains wet curtain paper.
Wherein, described paper is this area body paper commonly used.Described dipping, described oven dry are technological means well known to those skilled in the art, the time of described oven dry is preferably 5 seconds ~ and 10 seconds, be beneficial to the subsequent handling operation.Described compacting corrugation, describedly be fixed to technological means well known to those skilled in the art, the present invention does not all have particular restriction to it.The temperature of described curing is preferably 150 ℃ ~ 180 ℃, more preferably 160 ℃ ~ 170 ℃; The time of described curing is preferably 10min ~ 25min, more preferably 15min ~ 20min.The present invention adopts the wet curtain paper of described resin aqueous solution preparation, when not affecting normal production, saves and produces power consumption, enhances productivity, and reduces production costs.
After obtaining wet curtain paper, the present invention carries out performance test to it.The present invention cuts into the scraps of paper of 3 70mm * 40mm with the wet curtain paper of gained, according to the bending break stiffness of the wet curtain paper of the test of the method for Static bending among the CNS GB/T22364-2008 " mensuration of paper and cardboard bending break stiffness " gained.The present invention cuts into the scraps of paper of 3 7mm * 7mm with the wet curtain paper of gained, according to the bursting strength of the wet curtain paper of CNS GB/T454-2002 " mensuration of paper bursting strength " test gained.The present invention cuts into the scraps of paper of 100mm * 100mm with the wet curtain paper of gained, according to the relative water imbibition of the wet curtain paper of CNS GB/T461.3-2005 " paper and the absorptive mensuration of cardboard (bowssening) " test gained.
Experimental result shows, adopts preparation method provided by the invention to prepare wet curtain paper, and when its flexibility was 15 °, deflection can reach 110mN; The bursting strength of the wet curtain paper of gained can reach 200kPa; Water imbibition can reach 260% relatively.Show that the present invention adds water imbibition and the toughness that the resorcinol air aldehyde resin can improve wet curtain paper in conventional wet curtain paper usefulness resin, be beneficial to application.
In order further to understand the present invention, below in conjunction with embodiment the preparation method of wet curtain paper provided by the invention is described in detail.
The model that the used resorcinol air aldehyde resin of following examples provides for holy well group is the resorcinol formaldehyde resin of 9EXP0610, the model that the used phenolic resins of following examples and comparative example provides for holy well group is the phenolic resins of 9EXP0638, and the model that the used melamine resin of following examples provides for holy well group is the melamine resin of 9EXP0783.
Embodiment 1
In 1000 gram phenolic resins, the container of 50 gram resorcinol formaldehyde resins addings with agitator, add 3150 gram water, at room temperature stir 10min, obtain resin aqueous solution;
Described resin aqueous solution is poured in the steeping vat, the beginning impregnate paper, the paper after then will flooding is dried, and suppresses corrugation, typing after 5 seconds, is cured in 160 ℃ of baking ovens at last, solidifies behind the 25min and finishes, and obtains wet curtain paper.
After obtaining wet curtain paper, according to method mentioned above it is carried out performance test.The test result of bending break stiffness is referring to table 1, and table 1 is the bending break stiffness result of the wet curtain paper that obtains of the embodiment of the invention, comparative example; The test result of bursting strength is referring to table 2, and table 2 is the bursting strength result of the wet curtain paper that obtains of the embodiment of the invention, comparative example; Absorptive test result is referring to table 3, and table 3 is the water imbibition result of the wet curtain paper that obtains of the embodiment of the invention, comparative example.
Embodiment 2
In 1000 gram phenolic resins, the container of 150 gram resorcinol formaldehyde resins addings with agitator, add 3450 gram water, at room temperature stir 10min, obtain resin aqueous solution;
Described resin aqueous solution is poured in the steeping vat, the beginning impregnate paper, the paper after then will flooding is dried, and suppresses corrugation, typing after 10 seconds, is cured in 160 ℃ of baking ovens at last, solidifies behind the 20min and finishes, and obtains wet curtain paper.
After obtaining wet curtain paper, according to method mentioned above it is carried out performance test.The test result of bending break stiffness is referring to table 1, and the test result of bursting strength is referring to table 2, and absorptive test result is referring to table 3.
Embodiment 3
In 1000 gram phenolic resins, the container of 300 gram resorcinol formaldehyde resins addings with agitator, add 3900 gram water, at room temperature stir 10min, obtain resin aqueous solution;
Described resin aqueous solution is poured in the steeping vat, the beginning impregnate paper, the paper after then will flooding is dried, and suppresses corrugation, typing after 5 seconds, is cured in 160 ℃ of baking ovens at last, solidifies behind the 20min and finishes, and obtains wet curtain paper.
After obtaining wet curtain paper, according to method mentioned above it is carried out performance test.The test result of bending break stiffness is referring to table 1, and the test result of bursting strength is referring to table 2, and absorptive test result is referring to table 3.
Embodiment 4
In 1000 gram phenolic resins, the container of 50 gram resorcinol formaldehyde resins addings with agitator, add 3150 gram water, at room temperature stir 10min, obtain resin aqueous solution;
Described resin aqueous solution is poured in the steeping vat, the beginning impregnate paper, the paper after then will flooding is dried, and suppresses corrugation, typing after 5 seconds, is cured in 160 ℃ of baking ovens at last, solidifies behind the 15min and finishes, and obtains wet curtain paper.
After obtaining wet curtain paper, according to method mentioned above it is carried out performance test.The test result of bending break stiffness is referring to table 1, and the test result of bursting strength is referring to table 2, and absorptive test result is referring to table 3.
Embodiment 5
In 1000 gram melamine resins, the container of 50 gram resorcinol formaldehyde resins addings with agitator, add 3150 gram water, at room temperature stir 10min, obtain resin aqueous solution;
Described resin aqueous solution is poured in the steeping vat, the beginning impregnate paper, the paper after then will flooding is dried, and suppresses corrugation, typing after 10 seconds, is cured in 160 ℃ of baking ovens at last, solidifies behind the 15min and finishes, and obtains wet curtain paper.
After obtaining wet curtain paper, according to method mentioned above it is carried out performance test.The test result of bending break stiffness is referring to table 1, and the test result of bursting strength is referring to table 2, and absorptive test result is referring to table 3.
Embodiment 6
In 1000 gram melamine resins, the container of 200 gram resorcinol formaldehyde resins addings with agitator, add 3600 gram water, at room temperature stir 10min, obtain resin aqueous solution;
Described resin aqueous solution is poured in the steeping vat, the beginning impregnate paper, the paper after then will flooding is dried, and suppresses corrugation, typing after 10 seconds, is cured in 160 ℃ of baking ovens at last, solidifies behind the 15min and finishes, and obtains wet curtain paper.
After obtaining wet curtain paper, according to method mentioned above it is carried out performance test.The test result of bending break stiffness is referring to table 1, and the test result of bursting strength is referring to table 2, and absorptive test result is referring to table 3.
Comparative example 1
In the container of 1000 gram phenolic resins addings with agitator, add 3000 gram water, at room temperature stir 10min, obtain resin aqueous solution;
Described resin aqueous solution is poured in the steeping vat, the beginning impregnate paper, the paper after then will flooding is dried, and suppresses corrugation, typing after 5 seconds, is cured in 160 ℃ of baking ovens at last, solidifies behind the 45min and finishes, and obtains wet curtain paper.
After obtaining wet curtain paper, according to method mentioned above it is carried out performance test.The test result of bending break stiffness is referring to table 1, and the test result of bursting strength is referring to table 2, and absorptive test result is referring to table 3.
The bending break stiffness result of the wet curtain paper that table 1 embodiment of the invention, comparative example obtain
As shown in Table 1, with respect to comparative example, the bending break stiffness of the wet curtain paper that the embodiment of the invention provides is higher.
In addition, the amount of resorcinol air aldehyde resin is more, and resin solidification is better, and the bending break stiffness of the wet curtain paper of gained is higher.
Table 2 is the bursting strength result of the wet curtain paper that obtains of the embodiment of the invention, comparative example
As shown in Table 2, with respect to comparative example, the bursting strength of the wet curtain paper that the embodiment of the invention provides is higher, and toughness is better.
In addition, owing to enbrittle after thermosetting resin cured, the wet curtain paper of gained decreases with respect to the bursting strength of body paper.
Table 3 is the water imbibition result of the wet curtain paper that obtains of the embodiment of the invention, comparative example
As shown in Table 3, with respect to comparative example, the relative suction of the wet curtain paper that the embodiment of the invention provides is higher, and water imbibition is better.
As seen from the above embodiment, the wet curtain paper of method preparation provided by the invention has preferably water imbibition and toughness, and excellent performance is beneficial to application.
The explanation of above embodiment just is used for helping to understand method of the present invention and core concept thereof.Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention, can also carry out some improvement and modification to the present invention, these improvement and modification also fall in the protection domain of claim of the present invention.
Claims (10)
1. the preparation method of a wet curtain paper may further comprise the steps:
Phenolic resins, melamine resin or Lauxite are mixed with resorcinol air aldehyde resin, water, obtain resin aqueous solution;
Paper is flooded described resin aqueous solution, and more successively repressed corrugation, typing, curing obtains wet curtain paper.
2. preparation method according to claim 1 is characterized in that, the mass ratio of described phenolic resins, melamine resin or Lauxite and described resorcinol air aldehyde resin is 1:0.01 ~ 1.0.
3. preparation method according to claim 2 is characterized in that, the mass ratio of described phenolic resins, melamine resin or Lauxite and described resorcinol air aldehyde resin is 1:0.05 ~ 0.5.
4. preparation method according to claim 1 is characterized in that, described resorcinol air aldehyde resin is resorcinol formaldehyde resin, resorcinol acetaldehyde resin or resorcinol propionic aldehyde resin.
5. preparation method according to claim 1 is characterized in that, the weight average molecular weight of described resorcinol air aldehyde resin is 300 ~ 800; The solid content of described resorcinol air aldehyde resin is 45% ~ 55%.
6. preparation method according to claim 1 is characterized in that, the mass ratio of described resorcinol air aldehyde resin and described water is 1:2 ~ 4.
7. preparation method according to claim 1 is characterized in that, the mass ratio of described phenolic resins, melamine resin or Lauxite and described water is 1:2 ~ 4.
8. preparation method according to claim 1 is characterized in that, the temperature of described mixing is 5 ℃ ~ 40 ℃.
9. preparation method according to claim 1 is characterized in that, carries out under the described condition that is blended in stirring, and the time of described stirring is not less than 10min.
10. preparation method according to claim 1 is characterized in that, the temperature of described curing is 150 ℃ ~ 180 ℃, and the time of described curing is 10min ~ 25min.
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104294701A (en) * | 2014-09-23 | 2015-01-21 | 北京纳迅科技有限公司 | Phenolic resin solution for paper wet curtain and paper wet curtain |
| CN104403069A (en) * | 2014-12-16 | 2015-03-11 | 山东圣泉新材料股份有限公司 | Amino resin for flame-retardant wet curtain and preparation method thereof |
| CN106810656A (en) * | 2016-12-29 | 2017-06-09 | 广西玉林利而安化工有限公司 | A kind of phenol-formaldehyde resin modified and preparation method thereof |
| CN108035194A (en) * | 2017-05-28 | 2018-05-15 | 山东龙德复合材料科技股份有限公司 | A kind of rapid curing automobile filter paper dip-coating glue, automobile filter paper and preparation method using the dip-coating glue |
| CN112323535A (en) * | 2020-11-25 | 2021-02-05 | 郭春明 | Water curtain paper preparation equipment and preparation method |
| CN115807356A (en) * | 2022-12-09 | 2023-03-17 | 谢永培 | Humidifying and cooling porous absorbent paper, preparation process thereof, wet curtain and ventilation equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104294701A (en) * | 2014-09-23 | 2015-01-21 | 北京纳迅科技有限公司 | Phenolic resin solution for paper wet curtain and paper wet curtain |
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| CN108035194A (en) * | 2017-05-28 | 2018-05-15 | 山东龙德复合材料科技股份有限公司 | A kind of rapid curing automobile filter paper dip-coating glue, automobile filter paper and preparation method using the dip-coating glue |
| CN112323535A (en) * | 2020-11-25 | 2021-02-05 | 郭春明 | Water curtain paper preparation equipment and preparation method |
| CN115807356A (en) * | 2022-12-09 | 2023-03-17 | 谢永培 | Humidifying and cooling porous absorbent paper, preparation process thereof, wet curtain and ventilation equipment |
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