CN112659436A - Preparation method of high-density composite film - Google Patents
Preparation method of high-density composite film Download PDFInfo
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- CN112659436A CN112659436A CN202011500186.9A CN202011500186A CN112659436A CN 112659436 A CN112659436 A CN 112659436A CN 202011500186 A CN202011500186 A CN 202011500186A CN 112659436 A CN112659436 A CN 112659436A
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Abstract
The invention discloses a preparation method of a high-density composite film, belonging to the technical field of composite polymer film preparation, and comprising the following steps: s1, hot pressing: the hot pressing method comprises the following steps of (1) adopting a main hot pressing roller wound with a steel belt, enabling the composite film to enter between the steel belt and the main hot pressing roller, and adopting an auxiliary hot pressing roller to roll the composite film outside the steel belt in a tangent manner with the main hot pressing roller to carry out hot pressing on the composite film; s2, cold pressing: the method comprises the following steps of (1) adopting a main cold pressing roller wound with a steel belt, enabling a hot-pressed composite film to enter between the steel belt and the main cold pressing roller, and adopting a cold pressing group roller to roll the composite film in a tangent manner with the main cold pressing roller outside the steel belt to perform cold pressing on the composite film; and controlling the wrapping strength and the wrapping pressure of the steel strip by adjusting the tension of the steel strip in the steps S1 and S2, so that the composite film is attached to the surface of the main hot pressing roll or the main cold pressing roll without relative displacement. By means of continuous hot pressing and cold pressing of the composite film, the densification of the composite film is improved, continuous production is facilitated, and the production efficiency is improved.
Description
Technical Field
The invention belongs to the technical field of composite polymer film preparation, and particularly relates to a preparation method of a high-density composite film.
Background
In recent years, with the progress of electronic technology, electronic devices have been gradually miniaturized and thinned. Further, with the application of 5G technology, electronic devices are increasingly developed to the aspect of multi-band and wide-band integrated application. However, this development trend undoubtedly increases the design and manufacturing difficulty of electronic devices, and the problem of mutual interference and compatibility of multiple frequency bands also becomes a key difficulty in the integrated design of electronic devices.
In the design of the prior electronic equipment, the problem of electromagnetic compatibility between modules and between chips is often solved by adding a conductive shielding cover. The electromagnetic field interference between the modules and between the chips is blocked in a physical isolation mode, so that the problem of electromagnetic compatibility between the modules and between the chips is solved. However, as the internal space of the electronic device is further reduced and the internal modules and chips of the electronic device are further increased, the electromagnetic compatibility problem inside the electronic device cannot be comprehensively solved by singly adopting the conductive shielding case. The conductive film or the wave-absorbing film is pasted in the electronic equipment to relieve the electromagnetic interference problem in the equipment, and the method is another general means for designing the high-integration electronic equipment at present.
However, in the present stage, the conductive film or the wave-absorbing film often has the problems of low conductivity or low magnetic permeability and magnetic loss, which is not beneficial to the shielding and absorption of electromagnetic waves. Solving this problem needs to be solved through the mode that improves the high densification of composite film, but traditional mode needs the dull and stereotyped press mold of high pressure, and the press mold equipment is huge, and is inefficient, is unfavorable for continuous production.
Disclosure of Invention
In view of the above problems or disadvantages, the present invention provides a method for preparing a high-density composite film, which can be used for continuous production, so as to solve the problem of low film pressing efficiency in the conventional method.
In order to realize the purpose of the invention, the technical scheme is as follows: a preparation method of a high-density composite film comprises the following steps:
s1, hot pressing: the hot pressing method comprises the following steps of (1) adopting a main hot pressing roller wound with a steel belt, enabling a composite film to enter between the steel belt and the main hot pressing roller, adopting an auxiliary hot pressing roller to roll the steel belt in a tangent manner with the main hot pressing roller, and carrying out hot pressing on the composite film, wherein the temperature of the main hot pressing roller is 40-300 ℃;
s2, cold pressing: the method comprises the following steps of (1) adopting a main cold pressing roller wound with a steel belt, enabling a hot-pressed composite film to enter between the steel belt and the main cold pressing roller, adopting a cold pressing group roller to roll the composite film in a manner of being tangent to the main cold pressing roller outside the steel belt, and carrying out cold pressing on the composite film, wherein the temperature of the main cold pressing roller is 0-30 ℃, the cold pressing group roller comprises a plurality of cold pressing rollers tangent to the main cold pressing roller, and the pressure of the cold pressing group roller is smaller than that of the main cold pressing roller;
in the steps S1 and S2, the tension of the steel strip is adjusted to control the wrapping strength and wrapping pressure of the steel strip, so that the composite film is applied to the surface of the main hot-pressing roll or the main cold-pressing roll without relative displacement.
As a further alternative, before the step S1, the composite film material is attached to a tape, and the tape is guided to the step S1 by a tape guide roller.
As a further alternative, between the steps S1 and S2, a hot-pressing group roller is used to roll on the steel belt tangentially with the main hot-pressing roller to perform pressure holding, and the hot-pressing group roller includes a plurality of hot-pressing rollers tangential with the main hot-pressing roller.
As a further alternative, the pressure of the hot cluster rolls is less than the primary and secondary hot press rolls.
As a further alternative, it is made using the following equipment: the hot pressing device comprises a main hot pressing roller, a main cold pressing roller, a steel belt, an auxiliary hot pressing roller, a hot pressing group roller and a cold pressing group roller; the main hot pressing roller and the main cold pressing roller are sequentially arranged along the conveying direction of the film material belt, and the auxiliary hot pressing roller, the hot pressing group roller and the cold pressing group roller are sequentially arranged along the conveying direction of the film material belt; the steel strip sequentially bypasses the main hot pressing roller and the main cold pressing roller, and forms wrap angles with the main hot pressing roller and the main cold pressing roller respectively, and a material strip conveying channel is arranged between the outer circular surfaces of the main hot pressing roller and the main cold pressing roller and the steel strip; the auxiliary hot pressing roller and the hot pressing group roller are both positioned on one side of the steel strip, which is away from the main hot pressing roller, and are tangent to the main hot pressing roller; the cold pressing group roller is positioned on one side of the steel strip, which is far away from the main cold pressing roller, and is tangent to the main cold pressing roller.
As a further alternative, in the steps S1 and S2, the tension of the steel strip is adjusted using a steel strip tension control roller.
The invention has the beneficial effects that: the film material belt enters between the main hot-pressing roller and the steel belt, the auxiliary hot-pressing roller presses the side of the steel belt, which is not close to the material belt, the double rollers roll and transmit the pressure to the composite film through the steel belt, so that the composite film is densified, and meanwhile, the enough tension of the steel belt is kept, so that the composite film moves stably and is compressed tightly in the thickness direction; and when the composite film enters cold pressing, the cold pressing group of rollers are used for calendering to transmit pressure to the composite film, so that the composite film is further densified, and the composite film is tightly compressed in the thickness direction through the tension of a steel belt. By means of continuous hot pressing and cold pressing of the composite film, the densification of the composite film is improved, continuous production is facilitated, and the production efficiency is improved.
Drawings
In order to more clearly illustrate the technical solution of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, it should be understood that the drawings in the following description are some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a process diagram of a method for preparing a high-density composite film according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an apparatus used in a method for preparing a highly dense composite thin film according to an embodiment of the present invention;
reference numerals: the method comprises the following steps of 1-a film material belt, 2-a material belt guide roller, 3-a steel belt guide roller, 4-a cold pressing group roller, 5-a hot pressing group roller, 6-a main cold pressing roller, 7-a main hot pressing roller, 8-an auxiliary hot pressing roller, 9-a steel belt tension control roller and 10-a steel belt.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without any inventive step, are within the scope of the present invention. It is to be understood that the drawings are provided solely for the purposes of reference and illustration and are not intended as a definition of the limits of the invention. The connection relationships shown in the drawings are for clarity of description only and do not limit the manner of connection.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
The invention is further described with reference to the following figures and specific embodiments.
Fig. 1 shows a preparation method of a high-density composite film provided by the invention, which comprises the following steps:
s1, hot pressing: the method comprises the following steps of (1) adopting a main hot pressing roller 7 wound with a steel belt 10, enabling a composite film to enter between the steel belt 10 and the main hot pressing roller 7, adopting an auxiliary hot pressing roller 8 to roll the steel belt 10 outside in a tangent manner with the main hot pressing roller 7, and carrying out hot pressing on the composite film, wherein the temperature of the main hot pressing roller 7 is 40-300 ℃;
s2, cold pressing: the method comprises the following steps that a main cold pressing roller 6 wound with a steel belt 10 is adopted, a hot-pressed composite film enters between the steel belt 10 and the main cold pressing roller 6, a cold pressing group roller 4 is adopted to roll the steel belt 10 outside in a tangent mode with the main cold pressing roller 6, cold pressing of the composite film is carried out, the temperature of the main cold pressing roller 6 ranges from 0 ℃ to 30 ℃, the cold pressing group roller 4 comprises a plurality of cold pressing rollers tangent with the main cold pressing roller 6, and the pressure of the cold pressing group roller 4 is smaller than that of the main cold pressing roller 7 and that of an auxiliary hot pressing roller;
in the steps S1 and S2, the tension of the steel strip 10 is adjusted to control the wrapping strength and wrapping pressure of the steel strip 10, so that the composite film is applied to the surface of the main hot-pressing roll 7 or the main cold-pressing roll 6 without relative displacement. Specifically, the tension of the steel strip 10 can be adjusted by using the steel strip tension control roller 9.
Before step S1, the composite film material is attached to a tape, and the tape is guided to step S1 by a tape guide roller 2. Between the steps S1 and S2, the hot-pressing group roller 5 is adopted to roll outside the steel strip 10 in a tangent manner with the main hot-pressing roller 7 to perform pressure maintaining, the hot-pressing group roller 5 comprises a plurality of hot-pressing rollers in a tangent manner with the main hot-pressing roller 7, the hot-pressing group roller 5 conducts pressure to the composite film through the steel strip 10 by rolling, and the pressure maintaining effect is achieved, so that the composite film is further densified. The pressure of the cluster rolls 5 is less than the main heat press roll 7 and the auxiliary heat press roll 8.
Referring to fig. 1, the prepared composite film material is attached to a material belt in the production process, and the composite film material is firstly guided to the hot pressing process through a film material belt 1 and a material belt guide 2 roller.
The main calendering module of hot pressing process includes main hot pressing roller 7 and supplementary hot pressing roller 8 and steel band 10, and the composite film who comes the film material area 1 and carry over through two roller hot pressing, main hot pressing roller 7 temperature sets up to between 40 ℃ to 300 ℃ to cooperate the steel band 10 pressurize to finalize the design.
And then, the composite film enters a hot-pressing pressure-maintaining process. Mainly including main hot pressing roller 7 and hot pressing group's roller 5 and steel band 10, hot pressing group's roller 5 pressure is less than main hot pressing roller 7 and supplementary hot pressing roller 8, carries out the pressurize process.
The steel belt 10 transmission comprises a steel belt guide roller 3 and a steel belt tension control roller 9, the tension condition of a steel belt system is adjusted through the tension of the tension control roller, certain wrapping strength and wrapping pressure of the steel belt 10 are guaranteed, and the composite film can be well attached to the surface of the main hot pressing roller 7 and does not generate relative displacement.
After hot pressing, the composite film enters a cold pressing process. Similar to hot pressing, cold pressing is mainly a secondary shaping and densification of the hot pressing process. The steel strip cold pressing device comprises a main cold pressing roller 6, a cold pressing group roller 4 and a steel strip 10, wherein the temperature of the main cold pressing roller 6 is 0-30 ℃, and the pressure of the cold pressing group roller 4 is smaller than that of the main hot pressing roller 7 and that of the auxiliary hot pressing roller 8, so that the pressure maintaining process is realized. Similarly, the tension condition of the steel belt system is adjusted through the tension of the tension control roller, so that certain wrapping strength and wrapping pressure of the steel belt 10 are ensured, and the composite film can be well pasted on the surface of the main cold pressing roller 6 and does not generate relative displacement. Finally, the composite film material with high density and smooth surface is prepared.
Referring to fig. 2, the equipment adopted in the preparation method comprises a main hot pressing roller 7, a main cold pressing roller 6, a steel strip 10, an auxiliary hot pressing roller 8, a hot pressing group roller 5 and a cold pressing group roller 4; the main hot pressing roller 7 and the main cold pressing roller 6 are sequentially arranged along the conveying direction of the film material belt 1, and the auxiliary hot pressing roller 8, the hot pressing group roller 5 and the cold pressing group roller 4 are sequentially arranged along the conveying direction of the film material belt 1; the steel strip 10 sequentially bypasses the main hot pressing roller 7 and the main cold pressing roller 6, wrap angles are formed between the steel strip 10 and the main hot pressing roller 7 and the main cold pressing roller 6 respectively, and a material strip conveying channel is formed between the outer circular surfaces of the main hot pressing roller 7 and the main cold pressing roller 6 and the steel strip 10; the auxiliary hot pressing roller 8 and the hot pressing group roller 5 are both positioned on one side of the steel strip 10 departing from the main hot pressing roller 7 and are tangent to the main hot pressing roller 7; cold group roll 4 is located on the side of steel strip 10 facing away from main cold roll 6 and is tangent to main cold roll 6. The steel strip cold pressing device is characterized by further comprising a plurality of steel strip guide rollers 3 and two steel strip tension control rollers 9, wherein one of the steel strip guide rollers 3 is arranged between the main hot pressing roller 7 and the main cold pressing roller 6 in parallel and is located on one side, deviating from the material strip conveying channel, of the steel strip 10, so that the steel strip 10 can better bypass the same side of the main hot pressing roller 7 and the main cold pressing roller 6 and has a proper wrap angle.
The two steel strip tension control rollers 9 are respectively positioned at two sides of the main hot pressing roller 7 and the main cold pressing roller 6; the steel belt 10 is wrapped outside all the steel belt guide rollers 3 and the steel belt tension control rollers 9, and the steel belt tension and the pasting state in the hot pressing and cold pressing processes are better controlled respectively.
The invention is not limited to the above alternative embodiments, and any other various forms of products can be obtained by anyone in the light of the present invention, but any changes in shape or structure thereof, which fall within the scope of the present invention as defined in the claims, fall within the scope of the present invention.
Claims (6)
1. A preparation method of a high-density composite film is characterized by comprising the following steps:
s1, hot pressing: the hot pressing method comprises the following steps of (1) adopting a main hot pressing roller wound with a steel belt, enabling a composite film to enter between the steel belt and the main hot pressing roller, adopting an auxiliary hot pressing roller to roll the steel belt in a tangent manner with the main hot pressing roller, and carrying out hot pressing on the composite film, wherein the temperature of the main hot pressing roller is 40-300 ℃;
s2, cold pressing: the method comprises the following steps of (1) adopting a main cold pressing roller wound with a steel belt, enabling a hot-pressed composite film to enter between the steel belt and the main cold pressing roller, adopting a cold pressing group roller to roll the composite film in a manner of being tangent to the main cold pressing roller outside the steel belt, and carrying out cold pressing on the composite film, wherein the temperature of the main cold pressing roller is 0-30 ℃, the cold pressing group roller comprises a plurality of cold pressing rollers tangent to the main cold pressing roller, and the pressure of the cold pressing group roller is smaller than that of the main cold pressing roller;
in the steps S1 and S2, the tension of the steel strip is adjusted to control the wrapping strength and wrapping pressure of the steel strip, so that the composite film is applied to the surface of the main hot-pressing roll or the main cold-pressing roll without relative displacement.
2. The method of claim 1, wherein before the step S1, the composite film material is attached to a tape, and the tape is guided to the step S1 by a tape guide roller.
3. The method of claim 1, wherein between the steps S1 and S2, a hot-pressing group roller is used to roll on the steel belt tangentially to the main hot-pressing roller to perform pressure holding, and the hot-pressing group roller comprises a plurality of hot-pressing rollers tangential to the main hot-pressing roller.
4. The method for preparing a highly densified composite film according to claim 3, wherein the pressure of the hot cluster rolls is lower than that of the main hot press roll and the auxiliary hot press roll.
5. The preparation method of the high-density composite film according to claim 1, characterized by comprising the following steps: the hot pressing device comprises a main hot pressing roller, a main cold pressing roller, a steel belt, an auxiliary hot pressing roller, a hot pressing group roller and a cold pressing group roller; the main hot pressing roller and the main cold pressing roller are sequentially arranged along the conveying direction of the film material belt, and the auxiliary hot pressing roller, the hot pressing group roller and the cold pressing group roller are sequentially arranged along the conveying direction of the film material belt; the steel strip sequentially bypasses the main hot pressing roller and the main cold pressing roller, and forms wrap angles with the main hot pressing roller and the main cold pressing roller respectively, and a material strip conveying channel is arranged between the outer circular surfaces of the main hot pressing roller and the main cold pressing roller and the steel strip; the auxiliary hot pressing roller and the hot pressing group roller are both positioned on one side of the steel strip, which is away from the main hot pressing roller, and are tangent to the main hot pressing roller; the cold pressing group roller is positioned on one side of the steel strip, which is far away from the main cold pressing roller, and is tangent to the main cold pressing roller.
6. The method of preparing a highly dense composite film according to claim 1, wherein in the steps S1 and S2, the tension of the steel strip is adjusted using a steel strip tension control roller.
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| CN202011500186.9A CN112659436A (en) | 2020-12-18 | 2020-12-18 | Preparation method of high-density composite film |
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| GB189915401A (en) * | 1899-07-27 | 1900-07-14 | Tom Pratt | An Improved Method of Finishing and Pressing all kinds of Cloth and like Materials. |
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| CN105599068A (en) * | 2015-12-21 | 2016-05-25 | 北京林业大学 | Rolling hot press and veneer lengthwise joint system and method |
| CN106393933A (en) * | 2016-08-26 | 2017-02-15 | 兴化市正福塑业有限公司 | Integrally formed PVC sheet machining system |
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| CN209686101U (en) * | 2019-01-22 | 2019-11-26 | 上海盈兹无纺布有限公司 | A kind of hot-press arrangement for non-woven fabrics |
| CN211727415U (en) * | 2020-03-20 | 2020-10-23 | 崔新阳 | High-efficiency energy-saving aluminum profile casting machine |
| CN112048826A (en) * | 2020-09-25 | 2020-12-08 | 邹昊谚 | Non-woven fabric processing equipment |
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2020
- 2020-12-18 CN CN202011500186.9A patent/CN112659436A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB189915401A (en) * | 1899-07-27 | 1900-07-14 | Tom Pratt | An Improved Method of Finishing and Pressing all kinds of Cloth and like Materials. |
| DE4035787A1 (en) * | 1989-11-10 | 1991-05-16 | Berstorff Gmbh Masch Hermann | Press for continuous production of thin chip and fibre board - has heated central roller with ancillary rollers around which endless steel band is driven |
| CN201385355Y (en) * | 2009-04-07 | 2010-01-20 | 敦化市亚联机械制造有限公司 | Pressurizing and heating device for continuous rolling press |
| CN103072290A (en) * | 2012-11-27 | 2013-05-01 | 常州悦诚新材料有限公司 | Device for producing continuous glass fiber fabric thermoplastic laminated pressure plate |
| CN103950139A (en) * | 2014-05-16 | 2014-07-30 | 中南林业科技大学 | Energy-saving system and method for hot-press forming of bamboo-plastic composite material |
| CN105599068A (en) * | 2015-12-21 | 2016-05-25 | 北京林业大学 | Rolling hot press and veneer lengthwise joint system and method |
| CN106393933A (en) * | 2016-08-26 | 2017-02-15 | 兴化市正福塑业有限公司 | Integrally formed PVC sheet machining system |
| CN107187013A (en) * | 2017-07-18 | 2017-09-22 | 江西盛汇光学科技协同创新有限公司 | A kind of multi-functional die mould compounding machine group and the method for making microprism film |
| CN209686101U (en) * | 2019-01-22 | 2019-11-26 | 上海盈兹无纺布有限公司 | A kind of hot-press arrangement for non-woven fabrics |
| CN211727415U (en) * | 2020-03-20 | 2020-10-23 | 崔新阳 | High-efficiency energy-saving aluminum profile casting machine |
| CN112048826A (en) * | 2020-09-25 | 2020-12-08 | 邹昊谚 | Non-woven fabric processing equipment |
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Address after: No.288, west section of Wenming street, new economic Industrial Park, south area of Chengdu modern industrial port, Pidu District, Chengdu, Sichuan 610000 Applicant after: Chengdu Jiachi Electronic Technology Co.,Ltd. Address before: No.288, west section of Wenming street, new economic Industrial Park, south area of Chengdu modern industrial port, Pidu District, Chengdu, Sichuan 610000 Applicant before: CHENGDU JIACHI ELECTRONIC TECHNOLOGY Co.,Ltd. |
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