CN113601828A - LCP film preparation method for controlling temperature film blowing - Google Patents
LCP film preparation method for controlling temperature film blowing Download PDFInfo
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- CN113601828A CN113601828A CN202111031984.6A CN202111031984A CN113601828A CN 113601828 A CN113601828 A CN 113601828A CN 202111031984 A CN202111031984 A CN 202111031984A CN 113601828 A CN113601828 A CN 113601828A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C55/00—Shaping by stretching, e.g. drawing through a die; Apparatus therefor
- B29C55/28—Shaping by stretching, e.g. drawing through a die; Apparatus therefor of blown tubular films, e.g. by inflation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/16—Cooling
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
- B29C35/16—Cooling
- B29C2035/1616—Cooling using liquids
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- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a preparation method of LCP film for controlling temperature film blowing, which comprises the following steps: s1, drying raw materials: weighing the raw materials according to the weight parts, and then adding the raw materials into a drying tank for drying treatment; s2, mixing raw materials: uniformly mixing the dried raw materials, and performing melt extrusion to obtain a resin material; in the actual production, the transparency of the LCP film is detected, the film blowing temperature of the film blowing machine and the water flow speed of the cooling water pipe are adjusted according to the real-time transparency of the LCP film, the film is cooled by the cooling water pipe, the uniformity of film cooling can be ensured, the phenomenon that the air ring is unevenly cooled and wrinkles appear is avoided, meanwhile, the tubular film is attached to the inner wall of the cooling water pipe, the film can be shaped, and therefore the transparency and the wrinkles of the LCP film can be effectively improved.
Description
Technical Field
The invention relates to the technical field of LCP films, in particular to a preparation method of an LCP film for controlling temperature film blowing.
Background
The traditional terminal antenna mainly adopts a soft board process (PI soft board for short) based on a PI (polyimide) substrate, and an antenna module (PI antenna for short) is obtained by further processing the PI soft board; and the emerging terminal antenna adopts a LCP substrate-based flexible printed circuit board process (LCP flexible printed circuit board for short) and obtains an antenna module (LCP antenna for short) by further processing the LCP flexible printed circuit board.
The LCP soft board is not limited to a terminal antenna and a 3D sensing camera soft board, and is a miniaturized high-frequency high-speed soft board essentially, and from the logic of the miniaturized/high-frequency high-speed soft board, the LCP soft board comprises an antenna, a camera soft board, a high-speed transmission line, a display panel soft board, an SSD soft board, a communication cable, a millimeter wave radar and the like, and can benefit from the requirements of 5G communication frequency improvement and large-capacity data communication such as VR/AR and the like.
However, in the film blowing production work of the present LCP film, the transparency of the LCP film is related to the cooling effect, and when the existing film blowing machine is in production work, because there is an unstable factor in the equipment reason or the environmental temperature, the film blowing temperature of the film blowing machine is often in fluctuation, which may result in poor transparency of the LCP film, and cannot realize the control of the transparency of the LCP film.
Disclosure of Invention
The invention aims to provide a preparation method of an LCP film by controlling temperature blowing, which aims to solve the problem of poor transparency of the LCP film in the traditional film blowing process.
In order to achieve the purpose, the invention provides the following technical scheme: a preparation method of LCP film for controlling temperature blowing film comprises the following steps:
s1, drying raw materials: weighing the raw materials according to the weight parts, and then adding the raw materials into a drying tank for drying treatment;
s2, mixing raw materials: uniformly mixing the dried raw materials, and performing melt extrusion to obtain a resin material;
s3, film blowing and forming: blowing the resin material prepared in the step S2 on a single-screw film blowing machine for film forming to obtain a tubular film;
s4, cooling treatment: passing the tubular film in step S3 through a cooling water pipe, and expanding and cooling the tubular film by a gaseous medium introduced into the space inside the tubular film;
s5, film shaping: and (4) sequentially clamping the tubular film in the step S4 by a herringbone plate and drawing by a drawing roller, preheating the film to 60-110 ℃, and stretching and heat setting to obtain the LCP film finished product.
Preferably, in step S1, the raw materials consist of the following parts by weight: 30-60 parts of liquid crystal polymer, 30-60 parts of glass fiber, 2-13 parts of compatilizer, 1-6 parts of coupling agent, 0.3-1.5 parts of active ester curing agent and 0.5-3.5 parts of antioxidant.
Preferably, in step S4, the cooling water pipe is arranged in line with the annular die of the film blowing machine, and the cooling water pipe is used for cooling the tubular film.
Preferably, in step S4, the adjusting steps of the film blowing temperature of the film blowing machine and the water flow speed in the cooling water pipe are as follows:
s401, detecting the transparency of the film through a transparency detector, transmitting a detection result to a controller, and comparing the detected transparency value with a preset transparency value;
s402, when the detected transparency value deviates from a preset transparency value, acquiring the real-time film blowing temperature of the film blowing machine in real time, if the real-time film blowing temperature deviates from a preset value, adjusting the real-time film blowing temperature to the preset value without adjusting the water flow speed in the cooling water pipe, and if the real-time film blowing temperature does not deviate from the preset value, increasing the water flow speed in the cooling water pipe;
and S403, when the detected transparency value does not deviate from the preset transparency value, not adjusting the real-time film blowing temperature of the film blowing machine and the water flow speed in the cooling water pipe.
Preferably, in step S4, the real-time film blowing temperature of the film blowing machine is set to 70-110 ℃.
Preferably, in step S4, the set value of the water flow velocity in the cooling water pipe is 2 to 6 m/S.
Preferably, in step S4, the gaseous medium introduced into the space inside the tubular film is nitrogen.
Preferably, the tubular film is attached to the inner wall of the cooling water pipe, a cavity for water to flow is formed between the inner wall and the outer wall of the cooling water pipe, and a water flow sensor is arranged in the cavity.
Preferably, the rate of gas introduced into the space within the tubular film is the same as the rate of withdrawal of the take-off rolls of the extruder.
Preferably, the controller is respectively and electrically connected with the film blowing machine PLC and the water flow sensor.
Compared with the prior art, the invention has the beneficial effects that:
in the actual production, the transparency of the LCP film is detected, the film blowing temperature of the film blowing machine and the water flow speed of the cooling water pipe are adjusted according to the real-time transparency of the LCP film, the film is cooled by the cooling water pipe, the uniformity of film cooling can be ensured, the phenomenon that the air ring is unevenly cooled and wrinkles appear is avoided, meanwhile, the tubular film is attached to the inner wall of the cooling water pipe, the film can be shaped, and therefore the transparency and the wrinkles of the LCP film can be effectively improved.
Drawings
FIG. 1 is a flow chart of the preparation method of the present invention.
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 given herein without making any creative effort, shall fall within the protection scope of the present invention.
Example 1:
referring to fig. 1, the present invention provides a technical solution: a preparation method of LCP film for controlling temperature blowing film comprises the following steps:
s1, drying raw materials: weighing the raw materials according to the weight parts, and then adding the raw materials into a drying tank for drying treatment;
s2, mixing raw materials: uniformly mixing the dried raw materials, and performing melt extrusion to obtain a resin material;
s3, film blowing and forming: blowing the resin material prepared in the step S2 on a single-screw film blowing machine for film forming to obtain a tubular film;
s4, cooling treatment: passing the tubular film in step S3 through a cooling water pipe, and expanding and cooling the tubular film by a gaseous medium introduced into the space inside the tubular film;
s5, film shaping: and (4) sequentially clamping the tubular film in the step S4 by a herringbone plate and drawing by a drawing roller, preheating the film to 100 ℃, and stretching and heat setting to obtain the LCP film finished product.
In step S1, the raw materials include the following components in parts by weight: 50 parts of liquid crystal polymer, 40 parts of glass fiber, 8 parts of compatilizer, 4 parts of coupling agent, 1.1 parts of active ester curing agent and 2.3 parts of antioxidant.
In step S4, the cooling water pipes are arranged in a collinear manner with the annular die of the film blowing machine, and the cooling water pipes are used for cooling the tubular film.
In step S4, the adjusting steps of the film blowing temperature of the film blowing machine and the water flow velocity in the cooling water pipe are as follows:
s401, detecting the transparency of the film through a transparency detector, transmitting a detection result to a controller, and comparing the detected transparency value with a preset transparency value;
s402, collecting real-time film blowing temperature of a film blowing machine in real time when the detected transparency value deviates from a preset transparency value, adjusting the real-time film blowing temperature to 100 ℃ without adjusting the water flow speed in the cooling water pipe if the real-time film blowing temperature deviates from a preset value, and increasing the water flow speed in the cooling water pipe if the real-time film blowing temperature does not deviate from the preset value;
and S403, when the detected transparency value does not deviate from the preset transparency value, not adjusting the real-time film blowing temperature of the film blowing machine and the water flow speed in the cooling water pipe.
In step S4, the real-time film blowing temperature of the film blowing machine is set to 70-110 ℃.
In step S4, the set value of the water flow velocity in the cooling water pipe is 2 to 6 m/S.
Wherein, in step S4, the gas medium introduced into the space inside the tubular thin film is nitrogen gas.
Further, since nitrogen gas is oxygen-free and almost contains no moisture and oil, and nitrogen gas is less likely to chemically react with the LCP film due to its low molecular activity, the processing quality of the LCP film can be ensured, and the LCP film is not contaminated, because nitrogen gas is less likely to cause contamination than general high-pressure air.
Wherein, tubulose film and condenser tube inner wall laminate mutually, and set up the cavity that supplies water to flow between condenser tube inner wall and the outer wall, cavity internally mounted has the rivers sensor.
Wherein the rate of gas introduced into the space within the tubular film is the same as the draw rate of the draw rolls of the extruder.
Wherein, the controller is respectively and electrically connected with the film blowing machine PLC and the water flow sensor.
Example 2:
referring to fig. 1, the present invention provides a technical solution: a preparation method of LCP film for controlling temperature blowing film comprises the following steps:
s1, drying raw materials: weighing the raw materials according to the weight parts, and then adding the raw materials into a drying tank for drying treatment;
s2, mixing raw materials: uniformly mixing the dried raw materials, and performing melt extrusion to obtain a resin material;
s3, film blowing and forming: blowing the resin material prepared in the step S2 on a single-screw film blowing machine for film forming to obtain a tubular film;
s4, cooling treatment: passing the tubular film in step S3 through a cooling water pipe, and expanding and cooling the tubular film by a gaseous medium introduced into the space inside the tubular film;
s5, film shaping: and (4) sequentially clamping the tubular film in the step S4 by a herringbone plate and drawing by a drawing roller, preheating the film to 100 ℃, and stretching and heat setting to obtain the LCP film finished product.
In step S1, the raw materials include the following components in parts by weight: 50 parts of liquid crystal polymer, 40 parts of glass fiber, 8 parts of compatilizer, 4 parts of coupling agent, 1.1 parts of active ester curing agent and 2.3 parts of antioxidant.
In step S4, the adjusting steps of the film blowing temperature of the film blowing machine and the water flow velocity in the cooling water pipe are as follows:
s401, detecting the transparency of the film through a transparency detector, transmitting a detection result to a controller, and comparing the detected transparency value with a preset transparency value;
s402, when the detected transparency value deviates from a preset transparency value, acquiring the real-time film blowing temperature of the film blowing machine in real time, if the real-time film blowing temperature deviates from a preset value, adjusting the real-time film blowing temperature to the preset value without adjusting the water flow speed in the cooling water pipe, and if the real-time film blowing temperature does not deviate from the preset value, increasing the water flow speed in the cooling water pipe;
and S403, when the detected transparency value does not deviate from the preset transparency value, not adjusting the real-time film blowing temperature of the film blowing machine and the water flow speed in the cooling water pipe.
Example 3:
referring to fig. 1, the present invention provides a technical solution: a preparation method of LCP film for controlling temperature blowing film comprises the following steps:
s1, drying raw materials: weighing the raw materials according to the weight parts, and then adding the raw materials into a drying tank for drying treatment;
s2, mixing raw materials: uniformly mixing the dried raw materials, and performing melt extrusion to obtain a resin material;
s3, film blowing and forming: blowing the resin material prepared in the step S2 on a single-screw film blowing machine for film forming to obtain a tubular film;
s4, cooling treatment: passing the tubular film in step S3 through a cooling water pipe, and expanding and cooling the tubular film by a gaseous medium introduced into the space inside the tubular film;
s5, film shaping: and (4) sequentially clamping the tubular film in the step S4 by a herringbone plate and drawing by a drawing roller, preheating the film to 100 ℃, and stretching and heat setting to obtain the LCP film finished product.
In step S1, the raw materials include the following components in parts by weight: 50 parts of liquid crystal polymer, 40 parts of glass fiber, 8 parts of compatilizer, 4 parts of coupling agent, 1.1 parts of active ester curing agent and 2.3 parts of antioxidant.
In step S4, the adjusting steps of the film blowing temperature of the film blowing machine and the water flow velocity in the cooling water pipe are as follows:
s401, detecting the transparency of the film through a transparency detector, transmitting a detection result to a controller, and comparing the detected transparency value with a preset transparency value;
s402, when the detected transparency value deviates from a preset transparency value, acquiring the real-time film blowing temperature of the film blowing machine in real time, if the real-time film blowing temperature deviates from a preset value, adjusting the real-time film blowing temperature to the preset value without adjusting the water flow speed in the cooling water pipe, and if the real-time film blowing temperature does not deviate from the preset value, increasing the water flow speed in the cooling water pipe;
and S403, when the detected transparency value does not deviate from the preset transparency value, not adjusting the real-time film blowing temperature of the film blowing machine and the water flow speed in the cooling water pipe.
Example 4:
referring to fig. 1, the present invention provides a technical solution: a preparation method of LCP film for controlling temperature blowing film comprises the following steps:
s1, drying raw materials: weighing the raw materials according to the weight parts, and then adding the raw materials into a drying tank for drying treatment;
s2, mixing raw materials: uniformly mixing the dried raw materials, and performing melt extrusion to obtain a resin material;
s3, film blowing and forming: blowing the resin material prepared in the step S2 on a single-screw film blowing machine for film forming to obtain a tubular film;
s4, cooling treatment: passing the tubular film in step S3 through a cooling water pipe, and expanding and cooling the tubular film by a gaseous medium introduced into the space inside the tubular film;
s5, film shaping: and (4) sequentially clamping the tubular film in the step S4 by a herringbone plate and drawing by a drawing roller, preheating the film to 100 ℃, and stretching and heat setting to obtain the LCP film finished product.
In step S1, the raw materials include the following components in parts by weight: 50 parts of liquid crystal polymer, 40 parts of glass fiber, 8 parts of compatilizer, 4 parts of coupling agent, 1.1 parts of active ester curing agent and 2.3 parts of antioxidant.
In step S4, the adjusting steps of the film blowing temperature of the film blowing machine and the water flow velocity in the cooling water pipe are as follows:
s401, detecting the transparency of the film through a transparency detector, transmitting a detection result to a controller, and comparing the detected transparency value with a preset transparency value;
s402, when the detected transparency value deviates from a preset transparency value, acquiring the real-time film blowing temperature of the film blowing machine in real time, if the real-time film blowing temperature deviates from a preset value, adjusting the real-time film blowing temperature to the preset value without adjusting the water flow speed in the cooling water pipe, and if the real-time film blowing temperature does not deviate from the preset value, increasing the water flow speed in the cooling water pipe;
and S403, when the detected transparency value does not deviate from the preset transparency value, not adjusting the real-time film blowing temperature of the film blowing machine and the water flow speed in the cooling water pipe.
In order to facilitate the understanding of the technical solutions of the present invention, the following is a further explanation of the present invention with reference to experimental data:
table 1 shows the influence of the film blowing temperature of the film blowing machine and the water flow rate in the cooling water pipe on the transparency in examples 1 to 4:
(LCP film clarity is classified as 3 grades extremely high, medium, low, and extremely low)
As can be seen from the experimental data in Table 1, the transparency was the highest when the film blowing temperature of the film blowing machine was 110 ℃ and the water flow rates in the cooling water pipes were 4.8m/s and 6 m/s.
By combining the embodiments, the transparency of the LCP film is detected, the film blowing temperature of the film blowing machine and the water flow speed of the cooling water pipe are adjusted according to the real-time transparency of the LCP film, the film is cooled by the cooling water pipe, the uniformity of film cooling can be ensured, the phenomenon that the air ring is unevenly cooled and wrinkles appear can be avoided, meanwhile, the tubular film is attached to the inner wall of the cooling water pipe, the film can be shaped, and therefore the transparency and the wrinkles of the LCP film can be effectively improved.
In the several embodiments provided in the present invention, it should be understood that the disclosed apparatus may be implemented in other ways. The welding or screwing or winding of the parts to be welded or screwed together as shown or discussed can be assisted by means of devices such as welding torches, screwing with wrenches, etc., and the parts of the device can be made of various materials, such as metal materials, for example, aluminum alloys, steel and copper, by casting or by mechanical stamping.
It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A preparation method of LCP film for controlling temperature blowing film is characterized in that: the method comprises the following steps:
s1, drying raw materials: weighing the raw materials according to the weight parts, and then adding the raw materials into a drying tank for drying treatment;
s2, mixing raw materials: uniformly mixing the dried raw materials, and performing melt extrusion to obtain a resin material;
s3, film blowing and forming: blowing the resin material prepared in the step S2 on a single-screw film blowing machine for film forming to obtain a tubular film;
s4, cooling treatment: passing the tubular film in step S3 through a cooling water pipe, and expanding and cooling the tubular film by a gaseous medium introduced into the space inside the tubular film;
s5, film shaping: and (4) sequentially clamping the tubular film in the step S4 by a herringbone plate and drawing by a drawing roller, preheating the film to 60-110 ℃, and stretching and heat setting to obtain the LCP film finished product.
2. A method for preparing LCP film for controlling temperature blowing of film according to claim 1, wherein: in step S1, the raw materials consist of, by weight: 30-60 parts of liquid crystal polymer, 30-60 parts of glass fiber, 2-13 parts of compatilizer, 1-6 parts of coupling agent, 0.3-1.5 parts of active ester curing agent and 0.5-3.5 parts of antioxidant.
3. A method for preparing LCP film for controlling temperature blowing of film according to claim 1, wherein: in step S4, the cooling water pipes are arranged in a collinear manner with the annular die of the film blowing machine, and the cooling water pipes are used for cooling the tubular film.
4. A method for preparing LCP film for controlling temperature blowing of film according to claim 1, wherein: in step S4, the film blowing temperature of the film blowing machine and the water flow velocity in the cooling water pipe are adjusted as follows:
s401, detecting the transparency of the film through a transparency detector, transmitting a detection result to a controller, and comparing the detected transparency value with a preset transparency value;
s402, when the detected transparency value deviates from a preset transparency value, acquiring the real-time film blowing temperature of the film blowing machine in real time, if the real-time film blowing temperature deviates from a preset value, adjusting the real-time film blowing temperature to the preset value without adjusting the water flow speed in the cooling water pipe, and if the real-time film blowing temperature does not deviate from the preset value, increasing the water flow speed in the cooling water pipe;
and S403, when the detected transparency value does not deviate from the preset transparency value, not adjusting the real-time film blowing temperature of the film blowing machine and the water flow speed in the cooling water pipe.
5. A method for preparing LCP film for controlling temperature blowing of film according to claim 1, wherein: in step S4, the real-time film blowing temperature of the film blowing machine is set to 70-110 ℃.
6. A method for preparing LCP film for controlling temperature blowing of film according to claim 1, wherein: in step S4, the set value of the water flow velocity in the cooling water pipe is 2 to 6 m/S.
7. A method for preparing LCP film for controlling temperature blowing of film according to claim 1, wherein: in step S4, the gaseous medium introduced into the space inside the tubular film is nitrogen.
8. A method for preparing LCP film for controlling temperature blowing of film according to claim 1, wherein: the tubular film is attached to the inner wall of the cooling water pipe, a cavity for water to flow is formed between the inner wall and the outer wall of the cooling water pipe, and a water flow sensor is arranged inside the cavity.
9. A method for preparing LCP film for controlling temperature blowing of film according to claim 1, wherein: the gas rate introduced into the space inside the tubular film is the same as the take-off rate of the take-off rolls of the extruder.
10. A method for preparing LCP film for controlling temperature blowing film according to claim 4 wherein: and the controller is respectively electrically connected with the film blowing machine PLC and the water flow sensor.
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| CN116167640B (en) * | 2022-12-08 | 2024-04-09 | 南京贝迪新材料科技股份有限公司 | LCP film production quality detection data analysis method and system |
| CN116811085A (en) * | 2023-06-06 | 2023-09-29 | 广东汇发塑业科技有限公司 | Real-time evaluation method for running state of multilayer coextrusion film blowing machine |
| CN116811085B (en) * | 2023-06-06 | 2024-02-20 | 广东汇发塑业科技有限公司 | Real-time evaluation method for running state of multilayer coextrusion film blowing machine |
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