CN113619058A - Multilayer co-extrusion film technology for high and low temperature resistant fluororesin helium barrier film - Google Patents
Multilayer co-extrusion film technology for high and low temperature resistant fluororesin helium barrier film Download PDFInfo
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- CN113619058A CN113619058A CN202110922853.0A CN202110922853A CN113619058A CN 113619058 A CN113619058 A CN 113619058A CN 202110922853 A CN202110922853 A CN 202110922853A CN 113619058 A CN113619058 A CN 113619058A
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- film
- multilayer
- fluororesin
- extrusion
- low temperature
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Classifications
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0018—Combinations of extrusion moulding with other shaping operations combined with shaping by orienting, stretching or shrinking, e.g. film blowing
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/001—Combinations of extrusion moulding with other shaping operations
- B29C48/0022—Combinations of extrusion moulding with other shaping operations combined with cutting
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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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/022—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the choice of material
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
- B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
-
- 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
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
- B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
- B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
-
- 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
-
- 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
- B29C2793/00—Shaping techniques involving a cutting or machining operation
- B29C2793/0027—Cutting off
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
The invention discloses a high and low temperature resistant fluororesin helium barrier film multilayer co-extrusion film process, which comprises the following steps of: the raw materials are introduced into the screw extruder by means of an existing apparatus, then the temperature is brought to 200 to 350 ℃, and then heated, so that the materials are in a molten state. This fluororesin multilayer co-extrusion film production technology, because current fluororesin helium separation film multilayer co-extrusion film technology is in work, because fluororesin film itself does not possess high low temperature resistant function, so in case the film is worked under high low temperature environment, will lead to the damage of film, and then lead to the increase of cost, reduce the problem of fluororesin in other field practicality, so adopt special equipment's multilayer co-extrusion technology and special raw materials, increase the high low temperature resistant performance of film, thereby improve the availability factor of film, the blank to multilayer co-extrusion fluororesin film blowing stretch technology has been filled up domestically, also can regard as the barrier layer that closes on the space airship.
Description
Technical Field
The invention relates to the technical field of near space airship, in particular to a multilayer co-extrusion film process for a high and low temperature resistant fluororesin helium barrier film.
Background
The near space environment has low atmospheric density, small heat convection, strong solar radiation and high ozone concentration, and the working environment of the capsule of the near space aerostat is very harsh, so that the capsule material is one of the key technologies of the near space airship; the fluororesin film is a film used for a bag body material, but the plastic film in the market at present mainly takes a polyethylene plastic film as a main material, which causes serious pollution to the environment, is also called as 'white pollution' due to the difficult degradability of the polyethylene plastic film, can release harmful gas and threatens the health of people; films are widely used in electronics, machinery, printing and the like, and are classified according to the use of the film: there are agricultural films, packaging films; fluororesin films are also a commonly used industrial film.
When the existing fluororesin film is produced, the fluororesin film does not have the functions of resisting high and low temperatures, so that the film is damaged once the film works in a high-low temperature environment, the cost is increased, and the practicability of the fluororesin in other fields is reduced.
Disclosure of Invention
Technical problem to be solved
Aiming at the defects of the prior art, the invention provides a high and low temperature resistant fluororesin helium barrier film multilayer co-extrusion film process, which solves the problems that once a film works in a high and low temperature environment, the film is damaged, the cost is increased and the practicability of the fluororesin in other fields is reduced because the fluororesin film does not have the high and low temperature resistant function.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: a multilayer co-extrusion film process for a high and low temperature resistant fluororesin helium barrier film comprises the following steps:
s1 raw material addition: introducing raw materials into a screw extruder through the conventional device, heating to 200-350 ℃, and melting the materials;
s2, the high and low temperature resistance is improved: adopting a multi-layer co-extrusion process of special equipment and special raw materials, introducing the required materials into a screw extruder, and melting and plasticizing the materials by a screw;
s3 extrusion blow molding: starting the screw extruder to enable the screw extruder to work, and then extruding the polymer material;
s4 sizing: the melted resin is longitudinally stretched by the mechanical force of extrusion blow molding in an extruder, and is transversely stretched by compressed air blowing at the same time or later, so that the multilayer composite film is blown into a film, and the film is co-extruded by a plurality of extruders in the multilayer film extruder and is extruded at one head; cooling the multilayer film in the cooling line by a fan arranged on the extruder and a cooling ring arranged on the extruder head to finally obtain a rectangular fluororesin film;
s5 rolling: rolling the shaped film by a multi-roller shaft of a multilayer film extruder, cutting the edge of the shaped film by edge cutting equipment of the multilayer film extruder, and flattening and rolling the cut edge of the film by a flattening machine;
and (8) checking by S6: cutting samples with the length of about 5m before and after the multilayer composite film is wound, inspecting, taking a film on the sample, inspecting the temperature resistance condition of the film through a high-temperature and low-temperature environment box, judging whether the production of the fluororesin film meets the standard or not, and then processing the fluororesin film which does not meet the standard again;
s7 packaging: and sticking the multilayer composite film which meets the relevant requirements and does not meet the relevant requirements after the inspection to a sample label, packaging the film which meets the relevant requirements, and entering a finished product raw material area.
The film has high low temperature resistance after compounding fluororesin and other resin, and the special material includes polymer, resin, polyether ether ketone, thermoplastic polyester, modified polyphenyl ether and catalyst.
Wherein, the cut film is folded in half, the folded double-layer film is directly heat sealed, the pressure of the device is not lower than 0.1MPa, the time is not lower than 1s, and no waste is generated in the process.
The PUR glue is adopted, after being melted at the temperature of not less than 80 ℃, the PUR glue is coated on a film by a scraper, and the film is continuously pressed by a film laminating machine, so that no waste is generated in the process.
Wherein the cut films are heat sealed by a heat sealing machine at the temperature of 110-280 ℃, the pressure is not lower than 0.1MPa, the time is not lower than 2s, and the heat sealing performance test of the films is carried out.
(III) advantageous effects
The invention provides a multilayer co-extrusion film process for a high and low temperature resistant fluororesin helium barrier film, which has the following beneficial effects:
(1) this fluororesin multilayer coextrusion film production technology, because current fluororesin film is in the production, because fluororesin film itself does not possess high low temperature resistant function, so in case the film is worked under high low temperature environment, will lead to the damage of film, and then lead to the performance inefficacy, the problem of cost increase, so the multilayer coextrusion technology and the special raw materials of special equipment, improve the high low temperature resistant performance of film, thereby reduce the loss, the blank to multilayer coextrusion fluororesin film blowing stretch technology has also been filled up simultaneously domestically, can regard as the barrier layer of closing on the space airship.
Detailed Description
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.
The invention provides a technical scheme of a multilayer co-extrusion film of a high and low temperature resistant fluororesin helium barrier film, which comprises the following steps: the production process of the fluororesin multilayer co-extrusion film comprises the following steps:
s1 raw material addition: introducing raw materials into a screw extruder through the conventional device, heating to 200-350 ℃, and melting the materials;
s2, the high and low temperature resistance is improved: adopting a multi-layer co-extrusion process of special equipment and special raw materials, introducing the required materials into a screw extruder, and melting and plasticizing the materials by a screw;
s3 extrusion blow molding: starting the screw extruder to enable the screw extruder to work, and then extruding the polymer material;
s4 sizing: the melted resin is longitudinally stretched by the mechanical force of extrusion blow molding in an extruder, and is transversely stretched by compressed air blowing at the same time or later, so that the multilayer composite film is blown into a film, and the film is co-extruded by a plurality of extruders in the multilayer film extruder and is extruded at one head; cooling the multilayer film in the cooling line by a fan arranged on the extruder and a cooling ring arranged on the extruder head to finally obtain a rectangular fluororesin film;
s5 rolling: placing the shaped fluororesin film on a splitting machine, starting the splitting machine, and after a period of time, equally dividing the fluororesin film into a plurality of groups by the splitting machine;
and (8) checking by S6: cutting samples with the length of about 5m before and after the multilayer composite film is wound, inspecting, taking a film on the sample, inspecting the temperature resistance condition of the film through a high-temperature and low-temperature environment box, judging whether the production of the fluororesin film meets the standard or not, and then processing the fluororesin film which does not meet the standard again;
s7 packaging: sticking the multilayer composite film which meets the relevant requirements and does not meet the relevant requirements after inspection to a sample, packaging the film which meets the relevant requirements, and entering a finished product raw material area;
adopting a multi-layer co-extrusion process of special equipment and special raw materials, compounding fluororesin and other resins, improving the high and low temperature resistance of the film, wherein the types of the special raw materials are high molecular polymer, resin, polyether-ether-ketone, thermoplastic polyester, modified polyphenyl ether and catalyst, folding the cut film in half, directly heat-sealing the folded double-layer film, and when in heat sealing, the pressure of the equipment is not lower than 0.1MPa, and the time is not lower than 1 s; the process does not generate any waste, PUR glue is adopted, after the PUR glue is melted at the temperature of not less than 80 ℃, a film is coated by a scraper, and a laminating machine is used for continuous lamination, the process does not generate any waste, the cut film is subjected to heat sealing by a heat sealing machine, and the heat sealing is carried out at the temperature of 110-280 ℃, the pressure is not less than 0.1MPa, the time is not less than 2s, and the heat sealing performance test of the film is carried out.
In conclusion, the fluororesin multilayer co-extrusion film production process improves the high and low temperature resistance of the film by adopting the multilayer co-extrusion process of special equipment and special raw materials, thereby avoiding the problems that the film is damaged and further the performance is invalid and the cost is increased once the film works in a high and low temperature environment because the fluororesin film does not have the high and low temperature resistance, and further enhancing the practicability of the device.
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.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (5)
1. The multilayer co-extrusion film process for the fluororesin helium barrier film resistant to high and low temperatures is characterized by comprising the following steps of:
s1 raw material addition: introducing raw materials into a screw extruder through the conventional device, heating to 200-350 ℃, and melting the materials;
s2, the high and low temperature resistance is improved: adopting a multi-layer co-extrusion process of special equipment and special raw materials, introducing the required materials into a screw extruder, and melting and plasticizing the materials by a screw;
s3 extrusion blow molding: starting the screw extruder to enable the screw extruder to work, and then extruding the polymer material;
s4 sizing: the melted resin is longitudinally stretched by the mechanical force of extrusion blow molding in an extruder, and is transversely stretched by compressed air blowing at the same time or later, so that the multilayer composite film is blown into a film, and the film is co-extruded by a plurality of extruders in the multilayer film extruder and is extruded at one head; cooling the multilayer film in the cooling line by a fan arranged on the extruder and a cooling ring arranged on the extruder head to finally obtain a rectangular fluororesin film;
s5 rolling: rolling the shaped film by a multi-roller shaft of a multilayer film extruder, cutting the edge of the shaped film by edge cutting equipment of the multilayer film extruder, and flattening and rolling the cut edge of the film by a flattening machine;
and (8) checking by S6: cutting samples with the length of about 5m before and after the multilayer composite film is wound, inspecting, taking a film on the sample, inspecting the temperature resistance condition of the film through a high-temperature and low-temperature environment box, judging whether the production of the fluororesin film meets the standard or not, and then processing the fluororesin film which does not meet the standard again;
s7 packaging: and sticking the multilayer composite film which meets the relevant requirements and does not meet the relevant requirements after the inspection to a sample label, packaging the film which meets the relevant requirements, and entering a finished product raw material area.
2. The multilayer co-extrusion film process for the fluororesin helium barrier film resistant to high and low temperatures as claimed in claim 1, wherein: the film has high low temperature resistance after compounding fluororesin and other resin, and the special material is polymer, resin, polyether ether ketone, thermoplastic polyester, modified polyphenyl ether and catalyst.
3. The multilayer co-extrusion film process for the fluororesin helium barrier film resistant to high and low temperatures as claimed in claim 1, wherein: and (3) folding the cut film in half, and directly heat-sealing the folded double-layer film, wherein the pressure of the equipment is not lower than 0.1MPa and the time is not lower than 1s during heat sealing, so that no waste is generated in the process.
4. The multilayer co-extrusion film process for the fluororesin helium barrier film resistant to high and low temperatures as claimed in claim 1, wherein: PUR glue is adopted, after the PUR glue is melted at the temperature of not less than 80 ℃, a film is coated on the film by a scraper, and the film is continuously pressed by a film laminating machine, so that no waste is generated in the process.
5. The multilayer co-extrusion film process for the fluororesin helium barrier film resistant to high and low temperatures as claimed in claim 1, wherein: and (3) carrying out heat sealing on the cut films by using a heat sealing machine, and carrying out heat sealing on the films together at the temperature of 110-280 ℃ and under the pressure of not less than 0.1MPa and the time of not less than 2s to carry out a film heat sealing performance experiment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110922853.0A CN113619058A (en) | 2021-08-12 | 2021-08-12 | Multilayer co-extrusion film technology for high and low temperature resistant fluororesin helium barrier film |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110922853.0A CN113619058A (en) | 2021-08-12 | 2021-08-12 | Multilayer co-extrusion film technology for high and low temperature resistant fluororesin helium barrier film |
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| Publication Number | Publication Date |
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| CN113619058A true CN113619058A (en) | 2021-11-09 |
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| CN202110922853.0A Withdrawn CN113619058A (en) | 2021-08-12 | 2021-08-12 | Multilayer co-extrusion film technology for high and low temperature resistant fluororesin helium barrier film |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102731995A (en) * | 2012-07-13 | 2012-10-17 | 南京棠城塑胶有限公司 | Method for preparing puncture-resistant nylon composite film |
| CN106183292A (en) * | 2016-07-03 | 2016-12-07 | 厦门大学 | Three-layer co-extruded quick biaxial tension wide cut polyethylene co-extruded film and preparation method thereof |
| CN107603086A (en) * | 2017-08-04 | 2018-01-19 | 成都兆丰斯诺科技有限公司 | A kind of preparation method of macromolecule multiple field waterproofing membrane |
| CN207825651U (en) * | 2017-11-15 | 2018-09-07 | 东莞前沿技术研究院 | Polyethylene film and aerostat |
| CN111716857A (en) * | 2020-06-12 | 2020-09-29 | 江南大学 | Melt co-extrusion multilayer composite high-barrier film, preparation method and application thereof |
-
2021
- 2021-08-12 CN CN202110922853.0A patent/CN113619058A/en not_active Withdrawn
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102731995A (en) * | 2012-07-13 | 2012-10-17 | 南京棠城塑胶有限公司 | Method for preparing puncture-resistant nylon composite film |
| CN106183292A (en) * | 2016-07-03 | 2016-12-07 | 厦门大学 | Three-layer co-extruded quick biaxial tension wide cut polyethylene co-extruded film and preparation method thereof |
| CN107603086A (en) * | 2017-08-04 | 2018-01-19 | 成都兆丰斯诺科技有限公司 | A kind of preparation method of macromolecule multiple field waterproofing membrane |
| CN207825651U (en) * | 2017-11-15 | 2018-09-07 | 东莞前沿技术研究院 | Polyethylene film and aerostat |
| CN111716857A (en) * | 2020-06-12 | 2020-09-29 | 江南大学 | Melt co-extrusion multilayer composite high-barrier film, preparation method and application thereof |
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Application publication date: 20211109 |
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