CN109853295B - Anti-curl release paper and preparation method thereof - Google Patents
Anti-curl release paper and preparation method thereof Download PDFInfo
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- CN109853295B CN109853295B CN201811610283.6A CN201811610283A CN109853295B CN 109853295 B CN109853295 B CN 109853295B CN 201811610283 A CN201811610283 A CN 201811610283A CN 109853295 B CN109853295 B CN 109853295B
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Abstract
The invention discloses anti-curl release paper which comprises base paper, wherein a film coating layer is arranged on the base paper, and the film coating layer is prepared from the following raw materials in parts by weight: 85-95 parts of polypropylene, 15-20 parts of glycidyl methacrylate graft modified polyethylene, 5-9 parts of expanded graphite, 4-7 parts of polysiloxane and 10-16 parts of nano calcium carbonate. The anti-curling release paper disclosed by the invention is simple in structure, easy to machine and form, low in manufacturing cost, excellent in comprehensive performances such as paper film bonding strength, peeling strength, high temperature resistance and shrinkage rate, especially low in shrinkage rate, capable of effectively preventing curling in the using process and prolonging the service life, and the surface of the release paper is high temperature resistant and not easy to deform, and the coating and the base paper are not easy to peel, so that the service life is long.
Description
Technical Field
The invention relates to the field of release paper, in particular to anti-curl release paper and a preparation method thereof.
Background
Release paper needs to be used in a large amount in the industrial production process and is an indispensable carrier for transfer coating processing, and the surface of the release paper needs to resist high temperature and is not easy to deform; polypropylene (PP) material can make as the coating and can make from type paper surface high temperature resistant, non-deformable, peeling effect is good, but the PP material is difficult for combining with the body paper, Polyethylene (PE) material is used as the coating and can make and have higher bonding strength between coating and body paper, but do not have high temperature resistant and non-deformable's characteristic, use the mixed material of one deck PE and PP as the coating from type paper at present, make the former base stock of type paper and from type paper surface yielding, peel off, life is shorter, and the surface does not have better high temperature resistant, non-deformable's characteristic, peeling effect is also not good.
In addition, the release paper is easy to curl in the using process, and the service life is influenced.
Based on the situation, the invention provides the anti-curl release paper and the preparation method thereof, and the problems can be effectively solved.
Disclosure of Invention
The invention aims to provide anti-curling release paper and a preparation method thereof. The anti-curling release paper disclosed by the invention is simple in structure, easy to machine and form, low in manufacturing cost, excellent in comprehensive properties such as paper film bonding strength, peeling strength, high temperature resistance and shrinkage rate, especially low in shrinkage rate, and capable of effectively preventing curling in the using process and prolonging the service life.
The invention is realized by the following technical scheme:
the anti-curl release paper comprises base paper, wherein a spraying film layer is arranged on the base paper, and the spraying film layer is prepared from the following raw materials in parts by weight:
85-95 parts of polypropylene,
15-20 parts of glycidyl methacrylate graft modified polyethylene,
5-9 parts of expanded graphite,
4-7 parts of polysiloxane,
10-16 parts of nano calcium carbonate.
The anti-curling release paper disclosed by the invention is simple in structure, easy to machine and form, low in manufacturing cost, excellent in comprehensive performances such as paper film bonding strength, peeling strength, high temperature resistance and shrinkage rate, especially low in shrinkage rate, capable of effectively preventing curling in the using process and prolonging the service life, and the surface of the release paper is high temperature resistant and not easy to deform, and the coating and the base paper are not easy to peel, so that the service life is long.
Preferably, a laminating layer is arranged on the base paper, and is prepared from the following raw materials in parts by weight:
90 parts of polypropylene,
17.8 parts of glycidyl methacrylate graft modified polyethylene,
7.6 parts of expanded graphite,
5.5 parts of polysiloxane,
14.4 parts of nano calcium carbonate.
Preferably, the grafting ratio of the glycidyl methacrylate graft-modified polyethylene is 0.2-0.3%.
Preferably, the thickness of the laminating layer is 0.1-1 mm.
Preferably, the base paper is provided with a polyvinyl chloride coating layer of 1-2 g/m2 on the back of the base paper provided with the laminating layer.
The invention also provides a preparation method of the anti-curl release paper, which comprises the following steps:
A. preparing dry base paper: carrying out vacuum drying on the base paper to obtain dry base paper;
B. sanding the surface of the dry base paper: carrying out surface sanding treatment on the dried base paper by using a sanding machine to obtain pretreated base paper;
C. uniformly mixing polypropylene, glycidyl methacrylate graft modified polyethylene, expanded graphite, polysiloxane and nano calcium carbonate, feeding the mixture into a laminating machine, and extruding the mixture on the pretreated base paper through a die head of the laminating machine to obtain laminating paper;
D. coating a polyvinyl chloride coating layer of 1-2 g/m2 on the back surface of the laminating paper provided with the laminating layer to obtain a release paper primary product;
E. and sequentially carrying out corona pretreatment, super calendering and drying treatment on the release paper primary product to obtain the anti-curling release paper.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the anti-curling release paper disclosed by the invention is simple in structure, easy to machine and form, low in manufacturing cost, excellent in comprehensive performances such as paper film bonding strength, peeling strength, high temperature resistance and shrinkage rate, especially low in shrinkage rate, capable of effectively preventing curling in the using process and prolonging the service life, and the surface of the release paper is high temperature resistant and not easy to deform, and the coating and the base paper are not easy to peel, so that the service life is long.
The glycidyl methacrylate graft modified polyethylene is added into the release paper in a proper proportion to replace common polyethylene, has good compatibility with polypropylene and plays a good role in synergistic enhancement, so that the performances of paper film bonding strength, peeling strength and the like of the release paper are greatly improved, and the repeated use times are increased.
Compared with release paper with other formulas, the release paper disclosed by the invention has the advantages that the formula is optimized and the reasonable proportion is adopted, so that the shrinkage rate of the obtained release paper is low, the paper film has good bonding strength, peeling strength and high temperature resistance, the repeated use frequency of the release paper disclosed by the invention can be greatly improved, and the like.
The appropriate proportion of the expanded graphite is added into the release paper, so that the shrinkage rate of the release paper is greatly reduced.
Polysiloxane is added into the release paper in a proper proportion, so that the high temperature resistance of the release paper is greatly improved.
The preparation method has simple process and simple and convenient operation, and effectively saves manpower and equipment cost.
Detailed Description
The present invention will be described in further detail with reference to examples, but the embodiments of the present invention are not limited thereto.
The test methods or test methods described in the following examples are conventional methods unless otherwise specified; the reagents and materials, unless otherwise indicated, are conventionally obtained commercially or prepared by conventional methods.
Example 1:
the anti-curl release paper comprises base paper, wherein a spraying film layer is arranged on the base paper, and the spraying film layer is prepared from the following raw materials in parts by weight:
85-95 parts of polypropylene,
15-20 parts of glycidyl methacrylate graft modified polyethylene,
5-9 parts of expanded graphite,
4-7 parts of polysiloxane,
10-16 parts of nano calcium carbonate.
Example 2:
the anti-curl release paper comprises base paper, wherein a spraying film layer is arranged on the base paper, and the spraying film layer is prepared from the following raw materials in parts by weight:
85 parts of polypropylene,
15 parts of glycidyl methacrylate graft modified polyethylene,
5 parts of expanded graphite,
4 parts of polysiloxane,
10 parts of nano calcium carbonate.
In this example, the grafting ratio of the glycidyl methacrylate graft-modified polyethylene was 0.2%.
In this embodiment, the thickness of the lamination layer is 0.7 mm.
In this embodiment, a coating layer of polyvinyl chloride of 1g/m2 is further provided on the back of the base paper provided with the laminating layer.
In this embodiment, the method for preparing the anti-curl release paper comprises the following steps:
A. preparing dry base paper: carrying out vacuum drying on the base paper to obtain dry base paper;
B. sanding the surface of the dry base paper: carrying out surface sanding treatment on the dried base paper by using a sanding machine to obtain pretreated base paper;
C. uniformly mixing polypropylene, glycidyl methacrylate graft modified polyethylene, expanded graphite, polysiloxane and nano calcium carbonate, feeding the mixture into a laminating machine, and extruding the mixture on the pretreated base paper through a die head of the laminating machine to obtain laminating paper;
D. coating a polyvinyl chloride coating layer of 1g/m2 on the back surface of the laminating paper provided with the laminating layer to obtain a release paper primary product;
E. and sequentially carrying out corona pretreatment, super calendering and drying treatment on the release paper primary product to obtain the anti-curling release paper.
Example 3:
the anti-curl release paper comprises base paper, wherein a spraying film layer is arranged on the base paper, and the spraying film layer is prepared from the following raw materials in parts by weight:
95 parts of polypropylene,
20 parts of glycidyl methacrylate graft modified polyethylene,
9 parts of expanded graphite,
7 parts of polysiloxane,
16 parts of nano calcium carbonate.
In this example, the grafting ratio of the glycidyl methacrylate graft-modified polyethylene was 0.3%.
In this embodiment, the thickness of the lamination layer is 0.7 mm.
In the embodiment, the base paper is provided with a coating layer of polyvinyl chloride of 2g/m2 on the back of the laminating layer.
In this embodiment, the method for preparing the anti-curl release paper comprises the following steps:
A. preparing dry base paper: carrying out vacuum drying on the base paper to obtain dry base paper;
B. sanding the surface of the dry base paper: carrying out surface sanding treatment on the dried base paper by using a sanding machine to obtain pretreated base paper;
C. uniformly mixing polypropylene, glycidyl methacrylate graft modified polyethylene, expanded graphite, polysiloxane and nano calcium carbonate, feeding the mixture into a laminating machine, and extruding the mixture on the pretreated base paper through a die head of the laminating machine to obtain laminating paper;
D. coating a polyvinyl chloride coating layer of 2g/m2 on the back surface of the laminating paper provided with the laminating layer to obtain a release paper primary product;
E. and sequentially carrying out corona pretreatment, super calendering and drying treatment on the release paper primary product to obtain the anti-curling release paper.
Example 4:
the anti-curl release paper comprises base paper, wherein a spraying film layer is arranged on the base paper, and the spraying film layer is prepared from the following raw materials in parts by weight:
90 parts of polypropylene,
17.8 parts of glycidyl methacrylate graft modified polyethylene,
7.6 parts of expanded graphite,
5.5 parts of polysiloxane,
14.4 parts of nano calcium carbonate.
In this example, the grafting ratio of the glycidyl methacrylate graft-modified polyethylene was 0.25%.
In this embodiment, the thickness of the lamination layer is 0.7 mm.
In the embodiment, the base paper is provided with a coating layer of polyvinyl chloride of 2g/m2 on the back of the laminating layer.
In this embodiment, the method for preparing the anti-curl release paper comprises the following steps:
A. preparing dry base paper: carrying out vacuum drying on the base paper to obtain dry base paper;
B. sanding the surface of the dry base paper: carrying out surface sanding treatment on the dried base paper by using a sanding machine to obtain pretreated base paper;
C. uniformly mixing polypropylene, glycidyl methacrylate graft modified polyethylene, expanded graphite, polysiloxane and nano calcium carbonate, feeding the mixture into a laminating machine, and extruding the mixture on the pretreated base paper through a die head of the laminating machine to obtain laminating paper;
D. coating a polyvinyl chloride coating layer of 2g/m2 on the back surface of the laminating paper provided with the laminating layer to obtain a release paper primary product;
E. and sequentially carrying out corona pretreatment, super calendering and drying treatment on the release paper primary product to obtain the anti-curling release paper.
Comparative example 1
The difference from example 4 is that no expanded graphite is present, and the other steps are the same as example 4.
Comparative example 2
The difference from example 4 is that the polyethylene for glycidyl methacrylate graft-modified polyethylene was the same as in example 4.
Comparative example 3
The difference from example 4 is that it is not a polysiloxane, and the other is the same as example 4.
The following performance tests were performed on the release papers of examples 2 to 4 of the present invention and comparative examples 1 to 3, and the ordinary release paper, and the test results are shown in table 1:
TABLE 1
As can be seen from the above table, the anti-curling release paper of examples 2, 3 and 4 of the present invention has better overall properties such as paper film bonding strength, peeling strength, high temperature resistance, shrinkage rate, and particularly has low shrinkage rate, and can effectively prevent curling during use and prolong the service life.
By combining the example 4 with the comparative example 1, and the comparative example 2 with the comparative example 3, it can be known that the shrinkage rate of the release paper of the invention is low compared with the release paper of other formulas, the bonding strength, the peeling strength and the high temperature resistance of the paper film are good, the repeated use times of the release paper of the invention can be greatly improved, and the like; the appropriate proportion of the expanded graphite is added into the release paper, so that the shrinkage rate of the release paper is greatly reduced; polysiloxane is added into the release paper in a proper proportion, so that the high temperature resistance of the release paper is greatly improved; the glycidyl methacrylate graft modified polyethylene is added into the release paper in a proper proportion to replace common polyethylene, so that the laminated film layer and the base paper of the release paper have high bonding strength, and the repeated use times are increased.
In addition, the test shows that the repeated use times of the release paper reaches more than 50 times; the tensile strength (longitudinal strength) can reach 9.75 kN/m; the tensile strength (transverse) can reach 1583 mN; the solvent resistance is better.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and all simple modifications and equivalent variations of the above embodiments according to the technical spirit of the present invention are included in the scope of the present invention.
Claims (6)
1. The utility model provides an anti-curl release paper, includes the body paper, its characterized in that: the base paper is provided with a laminating layer, and the laminating layer is prepared from the following raw materials in parts by weight:
85-95 parts of polypropylene,
15-20 parts of glycidyl methacrylate graft modified polyethylene,
5-9 parts of expanded graphite,
4-7 parts of polysiloxane,
10-16 parts of nano calcium carbonate.
2. The curl-resistant release paper according to claim 1, wherein: the base paper is provided with a laminating layer, and the laminating layer is prepared from the following raw materials in parts by weight:
90 parts of polypropylene,
17.8 parts of glycidyl methacrylate graft modified polyethylene,
7.6 parts of expanded graphite,
5.5 parts of polysiloxane,
14.4 parts of nano calcium carbonate.
3. The curl-resistant release paper according to claim 1, wherein: the grafting rate of the glycidyl methacrylate graft modified polyethylene is 0.2-0.3%.
4. The curl-resistant release paper according to claim 1, wherein: the thickness of the laminating layer is 0.1-1 mm.
5. The curl-resistant release paper according to claim 1, wherein: the back surface of the base paper provided with the laminating layer is also provided with 1-2 g/m2Coating of polyvinyl chloride.
6. A method for preparing the anti-curl release paper as claimed in any one of claims 1 to 5, which comprises the following steps:
A. preparing dry base paper: carrying out vacuum drying on the base paper to obtain dry base paper;
B. sanding the surface of the dry base paper: carrying out surface sanding treatment on the dried base paper by using a sanding machine to obtain pretreated base paper;
C. uniformly mixing polypropylene, glycidyl methacrylate graft modified polyethylene, expanded graphite, polysiloxane and nano calcium carbonate, feeding the mixture into a laminating machine, and extruding the mixture on the pretreated base paper through a die head of the laminating machine to obtain laminating paper;
D. coating 1-2 g/m on the back surface of the laminating paper provided with the laminating layer2Coating the polyvinyl chloride to obtain a release paper primary product;
E. and sequentially carrying out corona pretreatment, super calendering and drying treatment on the release paper primary product to obtain the anti-curling release paper.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811610283.6A CN109853295B (en) | 2018-12-27 | 2018-12-27 | Anti-curl release paper and preparation method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811610283.6A CN109853295B (en) | 2018-12-27 | 2018-12-27 | Anti-curl release paper and preparation method thereof |
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| CN109853295A CN109853295A (en) | 2019-06-07 |
| CN109853295B true CN109853295B (en) | 2021-06-11 |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111451115A (en) * | 2020-04-07 | 2020-07-28 | 浙江望泰特种纸业有限公司 | Preparation method of high-temperature-resistant embossed release paper for synthetic leather |
| CN111395039B (en) * | 2020-04-07 | 2022-03-11 | 浙江望泰特种纸业有限公司 | High-wear-resistance anti-curling release paper |
| CN112726285A (en) * | 2021-01-20 | 2021-04-30 | 宝燕工业科技(南通)有限公司 | Release paper for producing close-contact adhesive tape |
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| CN102277791A (en) * | 2011-08-22 | 2011-12-14 | 湖南福泰数码材料科技有限公司 | Method for preparing release paper on basis of inorganic powder material and high molecular polymer |
| CN103183871A (en) * | 2011-12-31 | 2013-07-03 | 北京化工大学 | Polypropylene based resin composition for leather release paper, and preparation method and application thereof |
| CN104975536A (en) * | 2015-06-09 | 2015-10-14 | 东莞市尚鑫纸业有限公司 | Low density and soft release paper |
| CN106012670A (en) * | 2016-05-17 | 2016-10-12 | 湖南省和祥润新材料有限公司 | Release paper for adhesive tape and preparation method of release paper |
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- 2018-12-27 CN CN201811610283.6A patent/CN109853295B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102277791A (en) * | 2011-08-22 | 2011-12-14 | 湖南福泰数码材料科技有限公司 | Method for preparing release paper on basis of inorganic powder material and high molecular polymer |
| CN103183871A (en) * | 2011-12-31 | 2013-07-03 | 北京化工大学 | Polypropylene based resin composition for leather release paper, and preparation method and application thereof |
| CN104975536A (en) * | 2015-06-09 | 2015-10-14 | 东莞市尚鑫纸业有限公司 | Low density and soft release paper |
| CN106012670A (en) * | 2016-05-17 | 2016-10-12 | 湖南省和祥润新材料有限公司 | Release paper for adhesive tape and preparation method of release paper |
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