CN109853293B - High temperature resistant is from type paper - Google Patents
High temperature resistant is from type paper Download PDFInfo
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- CN109853293B CN109853293B CN201811611480.XA CN201811611480A CN109853293B CN 109853293 B CN109853293 B CN 109853293B CN 201811611480 A CN201811611480 A CN 201811611480A CN 109853293 B CN109853293 B CN 109853293B
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Abstract
The invention discloses high-temperature-resistant release paper which comprises base paper, wherein a first coating and a second coating are sequentially arranged on the base paper; the first coating is prepared from the following raw materials in parts by weight: 85-95 parts of polypropylene with the trade name of H2800, and 5-15 parts of glycidyl methacrylate grafted polypropylene; the second coating is prepared from the following raw materials in parts by weight: 90-98 parts of polypropylene with the trade name of H2800 and 2-10 parts of acrylamide grafted polypropylene; and the first coating and the second coating are compounded in a die head and then are extruded and coated on the base paper through the die head. The high-temperature-resistant release paper disclosed by the invention has the advantages that the comprehensive performances such as paper film bonding strength, peeling strength, high-temperature resistance, shrinkage rate and the like are excellent, the surface of the release paper is high-temperature-resistant and difficult to deform, a coating and base paper are difficult to peel, and the service life is long.
Description
Technical Field
The invention relates to the field of release paper, in particular to high-temperature-resistant release paper.
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.
Based on the situation, the invention provides the high-temperature-resistant release paper, which can effectively solve the problems.
Disclosure of Invention
The invention aims to provide high-temperature-resistant release paper. The high-temperature-resistant release paper disclosed by the invention has the advantages that the comprehensive performances such as paper film bonding strength, peeling strength, high-temperature resistance, shrinkage rate and the like are excellent, the surface of the release paper is high-temperature-resistant and difficult to deform, a coating and base paper are difficult to peel, and the service life is long.
The invention is realized by the following technical scheme:
the high-temperature-resistant release paper comprises base paper, wherein a first coating and a second coating are sequentially arranged on the base paper; the first coating is prepared from the following raw materials in parts by weight: 85-95 parts of polypropylene with the trade name of H2800, and 5-15 parts of glycidyl methacrylate grafted polypropylene; the second coating is prepared from the following raw materials in parts by weight: 90-98 parts of polypropylene with the trade name of H2800 and 2-10 parts of acrylamide grafted polypropylene; and the first coating and the second coating are compounded in a die head and then are extruded and coated on the base paper through the die head.
The high-temperature-resistant release paper disclosed by the invention has the advantages that the comprehensive performances such as paper film bonding strength, peeling strength, high-temperature resistance, shrinkage rate and the like are excellent, the surface of the release paper is high-temperature-resistant and difficult to deform, a coating and base paper are difficult to peel, and the service life is long.
Preferably, the first coating is prepared from the following raw materials in parts by weight: 88 parts of polypropylene with the mark of H2800 and 12 parts of glycidyl methacrylate grafted polypropylene.
Preferably, the second coating is prepared from the following raw materials in parts by weight: 96.5 parts of polypropylene with the mark of H2800 and 3.5 parts of acrylamide grafted polypropylene.
Preferably, the total thickness of the first coating and the second coating is 0.1-1 mm.
Preferably, the ratio of the thickness of the first coating to the thickness of the second coating is 1: 2-5.
Preferably, the grafting ratio of the glycidyl methacrylate grafted polypropylene is 0.15-0.25%.
Preferably, the grafting rate of the acrylamide grafted polypropylene is 0.12-0.22%.
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.
Compared with the prior art, the invention has the following advantages and beneficial effects:
the high-temperature-resistant release paper disclosed by the invention has the advantages that the comprehensive performances such as paper film bonding strength, peeling strength, high-temperature resistance, shrinkage rate and the like are excellent, the surface of the release paper is high-temperature-resistant and difficult to deform, a coating and base paper are difficult to peel, and the service life is long.
The invention abandons the use of polyethylene, selects polypropylene with the trade name of H2800 and glycidyl methacrylate grafted polypropylene with proper proportion to blend as a first coating, utilizes the characteristics of good fluidity, strong permeability and strong adhesive force with base paper of the glycidyl methacrylate grafted polypropylene in a molten state, adds an intermediate layer, ensures that the surface of the second release paper coating has the characteristics of high temperature resistance, difficult deformation and good peeling effect of a transfer coating in the production process due to a PP material, ensures that the first coating has higher bonding strength with the base paper due to the addition of the glycidyl methacrylate grafted polypropylene, and also has better bonding strength with the first coating, thereby ensuring that the surface coating and the base paper of the release paper have higher bonding strength, ensuring that the produced release paper has the characteristics of long service life and good peeling effect, the service life of the release paper produced by the prior art is about 30 times, and the service life of the release paper produced by the invention is about 70 times; and the PVA coating is covered on the back surface of the base paper, so that the release paper is not easy to curl in the production process and the process of producing artificial leather by utilizing the release paper.
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 high-temperature-resistant release paper comprises base paper, wherein a first coating and a second coating are sequentially arranged on the base paper; the first coating is prepared from the following raw materials in parts by weight: 85-95 parts of polypropylene with the trade name of H2800, and 5-15 parts of glycidyl methacrylate grafted polypropylene; the second coating is prepared from the following raw materials in parts by weight: 90-98 parts of polypropylene with the trade name of H2800 and 2-10 parts of acrylamide grafted polypropylene; and the first coating and the second coating are compounded in a die head and then are extruded and coated on the base paper through the die head.
Example 2:
the high-temperature-resistant release paper comprises base paper, wherein a first coating and a second coating are sequentially arranged on the base paper; the first coating is prepared from the following raw materials in parts by weight: 95 parts of polypropylene with the mark of H2800 and 5 parts of glycidyl methacrylate grafted polypropylene; the second coating is prepared from the following raw materials in parts by weight: 98 parts of polypropylene with the mark of H2800 and 2 parts of acrylamide grafted polypropylene; and the first coating and the second coating are compounded in a die head and then are extruded and coated on the base paper through the die head.
In this embodiment, the total thickness of the first coating and the second coating is 0.8 mm.
In this embodiment, the ratio of the thicknesses of the first coating layer and the second coating layer is 1: 2.
In this example, the grafting ratio of the glycidyl methacrylate grafted polypropylene was 0.15%.
In this example, the grafting ratio of the acrylamide grafted polypropylene is 0.12%.
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.
Example 3:
the high-temperature-resistant release paper comprises base paper, wherein a first coating and a second coating are sequentially arranged on the base paper; the first coating is prepared from the following raw materials in parts by weight: 85 parts of polypropylene with the trade name of H2800 and 15 parts of glycidyl methacrylate grafted polypropylene; the second coating is prepared from the following raw materials in parts by weight: 90 parts of polypropylene with the mark of H2800 and 10 parts of acrylamide grafted polypropylene; and the first coating and the second coating are compounded in a die head and then are extruded and coated on the base paper through the die head.
In this embodiment, the total thickness of the first coating and the second coating is 0.8 mm.
In this embodiment, the ratio of the thicknesses of the first coating layer and the second coating layer is 1: 5.
In this example, the grafting ratio of the glycidyl methacrylate grafted polypropylene was 0.25%.
In this example, the grafting ratio of the acrylamide grafted polypropylene is 0.22%.
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.
Example 4:
the high-temperature-resistant release paper comprises base paper, wherein a first coating and a second coating are sequentially arranged on the base paper; the first coating is prepared from the following raw materials in parts by weight: 88 parts of polypropylene with the trade name of H2800 and 12 parts of glycidyl methacrylate grafted polypropylene; the second coating is prepared from the following raw materials in parts by weight: 96.5 parts of polypropylene with the mark of H2800 and 3.5 parts of acrylamide grafted polypropylene; and the first coating and the second coating are compounded in a die head and then are extruded and coated on the base paper through the die head.
In this embodiment, the total thickness of the first coating and the second coating is 0.8 mm.
In this embodiment, the ratio of the thicknesses of the first coating layer and the second coating layer is 1: 4.
In this example, the grafting ratio of the glycidyl methacrylate grafted polypropylene was 0.18%.
In this example, the grafting ratio of the acrylamide grafted polypropylene is 0.16%.
In this embodiment, a coating layer of polyvinyl chloride of 1.5g/m2 is further provided on the back of the base paper provided with the laminating layer.
In the invention, the first coating and the second coating are compounded in a die head and then are extruded and coated on the base paper by the die head: the raw materials of the first coating and the second coating are respectively melted and uniformly mixed in a container according to the ratio, the two coatings enter a die head through double-layer co-extrusion, the two coatings respectively enter the die head, a vertical partition board is arranged in the die head to divide the die head into a first channel and a second channel which are arranged on the left and right, the first channel and the second channel are communicated at an outlet which is close to the vertical downward part of the die head in the die head, and the two coatings are converged in the die head and then vertically extruded downwards from a die head opening to cover the surface of base paper.
Comparative example: release paper prepared according to the patent application No. 201710057755.9.
The following tests were conducted on examples 2 to 4 of the present invention, comparative examples and ordinary release paper, and the test results are shown in table 1:
TABLE 1
As can be seen from the above table, the high temperature resistant release paper of examples 2, 3 and 4 of the present invention has excellent high temperature resistance.
In addition, the test proves that the paper film bonding strength of the release paper can reach 1.13N/15 mm; the peel strength can reach 0.214N/cm; the shrinkage rate can reach 1.6 percent; the repeated use times reach 70 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 (8)
1. The high-temperature-resistant release paper comprises base paper and is characterized in that: the base paper is sequentially provided with a first coating and a second coating; the first coating is prepared from the following raw materials in parts by weight: 85-95 parts of polypropylene with the trade name of H2800, and 5-15 parts of glycidyl methacrylate grafted polypropylene; the second coating is prepared from the following raw materials in parts by weight: 90-98 parts of polypropylene with the trade name of H2800 and 2-10 parts of acrylamide grafted polypropylene; and the first coating and the second coating are compounded in a die head and then are extruded and coated on the base paper through the die head.
2. The high temperature resistant release paper according to claim 1, characterized in that: the first coating is prepared from the following raw materials in parts by weight: 88 parts of polypropylene with the mark of H2800 and 12 parts of glycidyl methacrylate grafted polypropylene.
3. The high temperature resistant release paper according to claim 1, characterized in that: the second coating is prepared from the following raw materials in parts by weight: 96.5 parts of polypropylene with the mark of H2800 and 3.5 parts of acrylamide grafted polypropylene.
4. The high temperature resistant release paper according to any one of claims 1 to 3, characterized in that: the high temperature resistant release paper according to claim 1, characterized in that: the total thickness of the first coating and the second coating is 0.1-1 mm.
5. The high temperature resistant release paper according to any one of claims 1 to 3, characterized in that: the thickness ratio of the first coating to the second coating is 1: 2-5.
6. The high temperature resistant release paper according to any one of claims 1 to 3, characterized in that: the high temperature resistant release paper according to claim 1, characterized in that: the grafting rate of the glycidyl methacrylate grafted polypropylene is 0.15-0.25%.
7. The high temperature resistant release paper according to any one of claims 1 to 3, characterized in that: the grafting rate of the acrylamide grafted polypropylene is 0.12-0.22%.
8. The high temperature resistant release paper according to any one of claims 1 to 3, characterized in that: the back surface of the base paper provided with the laminating layer is also provided with 1-2 g/m2Coating of polyvinyl chloride.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811611480.XA CN109853293B (en) | 2018-12-27 | 2018-12-27 | High temperature resistant is from type paper |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811611480.XA CN109853293B (en) | 2018-12-27 | 2018-12-27 | High temperature resistant is from type paper |
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| Publication Number | Publication Date |
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| CN109853293A CN109853293A (en) | 2019-06-07 |
| CN109853293B true CN109853293B (en) | 2021-06-15 |
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| CN201811611480.XA Active CN109853293B (en) | 2018-12-27 | 2018-12-27 | High temperature resistant is from type paper |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110528326A (en) * | 2019-08-29 | 2019-12-03 | 江苏纹创科技有限公司 | A kind of release paper |
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| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN106835846B (en) * | 2017-01-23 | 2019-02-05 | 浙江博力莫新材料科技有限公司 | A kind of release paper |
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