CN105297534A - PVA (Poly Vinyl Alcohol) back-coating emulsion - Google Patents
PVA (Poly Vinyl Alcohol) back-coating emulsion Download PDFInfo
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- CN105297534A CN105297534A CN201510571014.3A CN201510571014A CN105297534A CN 105297534 A CN105297534 A CN 105297534A CN 201510571014 A CN201510571014 A CN 201510571014A CN 105297534 A CN105297534 A CN 105297534A
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Abstract
The invention discloses PVA (Poly Vinyl Alcohol) back-coating emulsion. The PVA back-coating emulsion is prepared from natural emulsion, deionized water, PVA and a defoaming agent, wherein the mass percentage of the natural emulsion is 25 to 30 percent, the mass percentage of the PVA is 65 to 70 percent, the mass percentage of the deionized water is 3 to 6 percent, and the balance is the defoaming agent. By painting the PVA back-coating emulsion on the back surface of paper brought from a paper manufacturer, a film layer can be formed on the back surface of the paper, moisture in the paper can be prevented from quickly volatizing or permeating, the extent and the speed of moisture variation can be reduced, and the PVA back-coating emulsion is more beneficial for paper preservation.
Description
Technical field
The invention belongs to paper printing manufacture field, relate to a kind of a kind of polyvinyl alcohol back of the body being coated in back side of paper and be coated with emulsion.
Background technology
The paper quality that sheet processing factory produces to be provided is difficult to unified, like this when utilizing paper printing, may have Some paper sheets flatness very poor, even obviously curling, this is very unfavorable to follow-up printing, will make the moment will pay close attention to paper trail in printing process, the efficiency of impact printing.Therefore, how to prevent this situation, and then raising printing efficiency is the problem that those skilled in the art need to solve.
Summary of the invention
In order to solve the problem, the invention provides a kind of polyvinyl alcohol back of the body and be coated with emulsion, before paper printing, be first coated in back side of paper, concrete technical scheme is as follows:
A kind of polyvinyl alcohol back of the body is coated with emulsion, comprises natural emulsion, deionized water, polyvinyl alcohol and defoamer, wherein, the mass fraction of natural emulsion is 25 ~ 30%, the mass fraction of polyvinyl alcohol is 65 ~ 70%, and the mass fraction of deionized water is 3 ~ 6%, and surplus is defoamer.
Quality own is uneven on the one hand for the paper that sheet processing factory provides, on the other hand, after resting period grown, moisture change obvious (moisture becomes greatly or diminishes), paper can be caused curling, this also brings a lot of trouble to follow-up typography, easily causes paper jam phenomenon, reduces printing efficiency.Now this polyvinyl alcohol back of the body provided by the invention is coated with emulsion and is first coated in back side of paper, this back of the body like this based on polyvinyl alcohol is coated with emulsion, so just can form one rete at back side of paper, can effectively prevent outside moisture from entering back side of paper, and then cause paper curling, also can prevent carrying on the back the moisture be coated with in emulsion rete and volatilize rapidly, greatly reduce amplitude of variation and the speed of Paper Moisture like this, make paper not easily curling, in follow-up printing, there will not be paper jam phenomenon.
Further improvement is: described natural emulsion is through thickening process, and the mass ratio of thickener and natural emulsion is 1:9 ~ 1.5:8.5.
Natural emulsion, through thickening process, can increase on the one hand the polarity of natural emulsion, makes its intermiscibility with deionized water better, on the other hand, can better and back side of paper better bond.
Further improvement is: described thickener is vegetable oil.
Because vegetable oil is prevalent in the Nature, cost is minimum.
Further improvement is: described natural emulsion and polar functional group carry out grafting process.
Further improvement is: described natural emulsion and methyl methacrylate carry out grafting process.
Carry out grafting process with polar functional group, increase the polarity of natural emulsion, can increase the performance that mixes of itself and water so on the one hand, another aspect also can increase its tackness.
Beneficial effect of the present invention: a kind of polyvinyl alcohol back of the body provided by the invention is coated with emulsion, after back side of paper is coated, one rete can be formed, prevent moisture from significantly passing in and out, reduce amplitude and the speed of moisture change in paper, be conducive to the long-term preservation of paper, this saves the much time to follow-up print routine.
Detailed description of the invention
In order to deepen the understanding of the present invention, be described in further detail the present invention below in conjunction with embodiment, this embodiment, only for explaining the present invention, not forming protection domain and limiting.
Embodiment one
A kind of polyvinyl alcohol back of the body is coated with emulsion, comprise natural emulsion, deionized water, polyvinyl alcohol and defoamer, natural emulsion thing is through peanut oil process, the mass ratio of peanut oil and natural emulsion is 1:9, wherein, the mass fraction of natural emulsion is 30%, and the mass fraction of polyvinyl alcohol is 65%, the mass fraction of deionized water is 3%, and surplus is defoamer.
A kind of polyvinyl alcohol back of the body that the present embodiment provides is coated with emulsion, after paper paper production producer provided is transported back, first all back side of paper are coated this polyvinyl alcohol back of the body and be coated with emulsion, after treating that it has done, just can long-term storage, do not worry that paper has obviously curling, in this printing in later stage processing, can not paper jam phenomenon be caused.The natural emulsion that this polyvinyl alcohol back of the body is coated with in emulsion can play adhesive effect, make this back of the body be coated with emulsion and be coated in back side of paper quickly and easily, then, because polyvinyl alcohol has more excellent filming performance, one rete can be formed on surface after having done, the water of such paper inside is not easy volatilization and sheds, and, outside aqueous vapor is also difficult to enter into paper inside, carry out ensureing that the amplitude of Paper Moisture change is all smaller with speed, paper can not be caused curling, and then be conducive to follow-up printing processing, also the long-term storage of paper is conducive to, especially under extremely wet or extremely dry condition, also longer a period of time can be preserved.
Embodiment two
A kind of polyvinyl alcohol back of the body is coated with emulsion, comprise natural emulsion, deionized water, polyvinyl alcohol and defoamer, described natural emulsion and methyl methacrylate carry out grafting process, wherein, the mass fraction of natural emulsion is 27%, the mass fraction of polyvinyl alcohol is 67%, and the mass fraction of deionized water is 4%, and surplus is defoamer.
A kind of polyvinyl alcohol back of the body that the present embodiment provides is coated with emulsion; first by the polar functional group grafting in natural emulsion and methyl methacrylate; increase its polarity, increase the intermiscibility with water, improve its bonding force; then after making back of the body painting emulsion; be coated in back side of paper, after treating that it has done, form protective film; prevent moisture from significantly passing in and out, be conducive to the long-term preservation of paper.And because the polar functional group in methyl acrylate is grafted in natural emulsion, and a kind of connection of chemical bond can be formed with moisture due to it, suitably can store or discharge a certain amount of moisture, therefore depositing effect more remarkable.
Following form is the contrast form of a series of paper storage time and effect.
Table one is three class paper is deposit situation 50% time at relative air humidity.
Table two is three class paper at relative air humidity is deposit situation under 90%.
Table one:
| Paper type | Traditional paper | Paper in embodiment one after back of the body painting emulsion | Paper in embodiment two after back of the body painting emulsion |
| Deposit one month | Unchanged | Unchanged | Unchanged |
| Deposit three months | Slightly curling | Unchanged | Unchanged |
| Deposit five months | Curling | Unchanged | Unchanged |
| Deposit ten months | Severe curl | Slightly curling | Unchanged |
Table two:
| Paper type | Traditional paper | Paper in embodiment one after back of the body painting emulsion | Paper in embodiment two after back of the body painting emulsion |
| Deposit one month | Curling | Unchanged | Unchanged |
| Deposit three months | Severe curl | Slightly curling | Unchanged |
| Deposit five months | Severe curl | Slightly curling | Slightly curling |
| Deposit ten months | Severe curl | Curling | Curling |
Claims (5)
1. the polyvinyl alcohol back of the body is coated with an emulsion, it is characterized in that: comprise natural emulsion, deionized water, polyvinyl alcohol and defoamer, wherein, the mass fraction of natural emulsion is 25 ~ 30%, the mass fraction of polyvinyl alcohol is 65 ~ 70%, and the mass fraction of deionized water is 3 ~ 6%, and surplus is defoamer.
2. a kind of polyvinyl alcohol back of the body according to claim 1 is coated with emulsion, it is characterized in that: described natural emulsion is through thickening process, and the mass ratio of thickener and natural emulsion is 1:9 ~ 1.5:8.5.
3. a kind of polyvinyl alcohol back of the body according to claim 2 is coated with emulsion, it is characterized in that: described thickener is vegetable oil.
4. a kind of polyvinyl alcohol back of the body according to claim 1 is coated with emulsion, it is characterized in that: described natural emulsion and polar functional group carry out grafting process.
5. a kind of polyvinyl alcohol back of the body according to claim 4 is coated with emulsion, it is characterized in that: described natural emulsion and methyl methacrylate carry out grafting process.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510571014.3A CN105297534A (en) | 2015-09-10 | 2015-09-10 | PVA (Poly Vinyl Alcohol) back-coating emulsion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510571014.3A CN105297534A (en) | 2015-09-10 | 2015-09-10 | PVA (Poly Vinyl Alcohol) back-coating emulsion |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105297534A true CN105297534A (en) | 2016-02-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510571014.3A Pending CN105297534A (en) | 2015-09-10 | 2015-09-10 | PVA (Poly Vinyl Alcohol) back-coating emulsion |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107326731A (en) * | 2017-08-03 | 2017-11-07 | 湖北绿新环保包装科技有限公司 | A kind of back of the body for preventing paper NMF closure plate applies emulsion |
| CN109403135A (en) * | 2018-10-19 | 2019-03-01 | 上海睿途新材料科技有限公司 | It is a kind of for controlling the gum material and its application method of paper formation degree |
| CN109736126A (en) * | 2019-01-18 | 2019-05-10 | 中国制浆造纸研究院有限公司 | A kind of production method of highback glue amount stamp paper |
| CN115075048A (en) * | 2022-08-15 | 2022-09-20 | 汕头市嘉信包装材料有限公司 | Back coating adhesive for preventing high-temperature adhesion coated paperboard and preparation method thereof |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104440618A (en) * | 2014-11-04 | 2015-03-25 | 江苏三菱磨料磨具有限公司 | Novel method for manufacturing paper and cloth composite base material coated abrasive tool sanding belt |
| CN104594124A (en) * | 2014-12-30 | 2015-05-06 | 江苏琛亚印材科技有限公司 | Application of waterborne back-coating emulsion (humectant) in packaging industry |
| CN104877430A (en) * | 2015-06-23 | 2015-09-02 | 南昌添丽特实业有限责任公司 | Microcapsule paint containing dye and preparation method thereof |
-
2015
- 2015-09-10 CN CN201510571014.3A patent/CN105297534A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104440618A (en) * | 2014-11-04 | 2015-03-25 | 江苏三菱磨料磨具有限公司 | Novel method for manufacturing paper and cloth composite base material coated abrasive tool sanding belt |
| CN104594124A (en) * | 2014-12-30 | 2015-05-06 | 江苏琛亚印材科技有限公司 | Application of waterborne back-coating emulsion (humectant) in packaging industry |
| CN104877430A (en) * | 2015-06-23 | 2015-09-02 | 南昌添丽特实业有限责任公司 | Microcapsule paint containing dye and preparation method thereof |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107326731A (en) * | 2017-08-03 | 2017-11-07 | 湖北绿新环保包装科技有限公司 | A kind of back of the body for preventing paper NMF closure plate applies emulsion |
| CN109403135A (en) * | 2018-10-19 | 2019-03-01 | 上海睿途新材料科技有限公司 | It is a kind of for controlling the gum material and its application method of paper formation degree |
| CN109403135B (en) * | 2018-10-19 | 2021-08-10 | 上海睿途新材料科技有限公司 | Back adhesive material for controlling paper flatness and application method thereof |
| CN109736126A (en) * | 2019-01-18 | 2019-05-10 | 中国制浆造纸研究院有限公司 | A kind of production method of highback glue amount stamp paper |
| CN115075048A (en) * | 2022-08-15 | 2022-09-20 | 汕头市嘉信包装材料有限公司 | Back coating adhesive for preventing high-temperature adhesion coated paperboard and preparation method thereof |
| CN115075048B (en) * | 2022-08-15 | 2022-11-11 | 汕头市嘉信包装材料有限公司 | Back coating adhesive for preventing high-temperature adhesion coated paperboard and preparation method thereof |
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Application publication date: 20160203 |