CN110626028A - High-temperature-resistant flame-retardant polyamide film and preparation method thereof - Google Patents
High-temperature-resistant flame-retardant polyamide film and preparation method thereof Download PDFInfo
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D7/00—Producing flat articles, e.g. films or sheets
- B29D7/01—Films or sheets
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/18—Layered products comprising a layer of synthetic resin characterised by the use of special additives
- B32B27/20—Layered products comprising a layer of synthetic resin characterised by the use of special additives using fillers, pigments, thixotroping agents
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/34—Layered products comprising a layer of synthetic resin comprising polyamides
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B65—CONVEYING; PACKING; STORING; HANDLING THIN OR FILAMENTARY MATERIAL
- B65D—CONTAINERS FOR STORAGE OR TRANSPORT OF ARTICLES OR MATERIALS, e.g. BAGS, BARRELS, BOTTLES, BOXES, CANS, CARTONS, CRATES, DRUMS, JARS, TANKS, HOPPERS, FORWARDING CONTAINERS; ACCESSORIES, CLOSURES, OR FITTINGS THEREFOR; PACKAGING ELEMENTS; PACKAGES
- B65D65/00—Wrappers or flexible covers; Packaging materials of special type or form
- B65D65/38—Packaging materials of special type or form
- B65D65/40—Applications of laminates for particular packaging purposes
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
- B32B2307/306—Resistant to heat
- B32B2307/3065—Flame resistant or retardant, fire resistant or retardant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2217—Oxides; Hydroxides of metals of magnesium
- C08K2003/2224—Magnesium hydroxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/02—Flame or fire retardant/resistant
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/06—Polymer mixtures characterised by other features having improved processability or containing aids for moulding methods
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/08—Polymer mixtures characterised by other features containing additives to improve the compatibility between two polymers
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- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Laminated Bodies (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention provides a high-temperature-resistant flame-retardant polyamide film and a preparation method thereof, wherein the high-temperature-resistant flame-retardant polyamide film comprises a three-layer superposed film structure which sequentially comprises an upper surface layer, a core layer and a lower surface layer from outside to inside; the components of the upper surface layer and the lower surface layer comprise: 50-80 parts of polyamide, 10-20 parts of polyphenyl ether, 5-10 parts of PET (polyethylene terephthalate) resin, 5-10 parts of toughening agent, 2-5 parts of compatilizer, 1-5 parts of flame retardant, 0.1-1 part of antioxidant, 0.1-1 part of processing aid, 0.4-1 part of opening agent and 0.1-0.5 part of slipping agent; the core layer comprises the following components: 50-80 parts of polyamide, 10-20 parts of polyphenyl ether, 5-10 parts of PET resin, 5-10 parts of toughening agent, 2-5 parts of compatilizer, 1-5 parts of flame retardant, 0.1-1 part of antioxidant and 0.5-2 parts of lubricant. According to the high-temperature-resistant flame-retardant polyamide film provided by the invention, the flame retardant is matched with other specific components, so that the flame retardant grade of the film reaches the standard specification, the mechanical property is excellent, and the film is easy to form.
Description
Technical Field
The invention relates to the technical field of high-temperature-resistant film materials, in particular to a high-temperature-resistant flame-retardant polyamide film and a preparation method thereof.
Background
At present, polyamide films are widely used as packaging materials in the fields of daily necessities, electronic products, foods, medicines and the like. In the fields of electronic and electric appliances, aerospace, war industry and the like, because of the high-temperature environment, the applied film has excellent performance and high-temperature resistance, and is also required to have flame retardant performance.
From the prior related literature reports, the heat resistance of polyamide can be improved by adding glass fiber, such as: 30 percent of glass fiber is added into PA6, and the heat distortion temperature can reach 200 ℃; PA66 with 30% glass fiber added, the heat distortion temperature can reach 250 ℃. However, when glass fibers are added to a polyamide film, the mechanical properties of the polyamide film are greatly reduced, and the polyamide film cannot be stretch-molded. The document also shows that the flame retardant property of polyamide can be improved by adding the flame retardant, but the addition amount of the flame retardant is too high for reaching the specified flame retardant grade, so that the problems of great reduction of mechanical property and difficult film forming exist, and the application of the flame retardant in the field of films is limited.
Disclosure of Invention
In order to solve the problems of too high addition of a flame retardant, great reduction of mechanical properties and difficulty in film forming in the background art, the invention provides a high-temperature-resistant flame-retardant polyamide film which comprises a three-layer superposed film structure, wherein the film structure sequentially comprises an upper surface layer, a core layer and a lower surface layer from outside to inside;
the upper surface layer comprises the following components in parts by mass: 50-80 parts of polyamide, 10-20 parts of polyphenyl ether, 5-10 parts of PET (polyethylene terephthalate) resin, 5-10 parts of toughening agent, 2-5 parts of compatilizer, 1-5 parts of flame retardant, 0.1-1 part of antioxidant, 0.1-1 part of processing aid, 0.4-1 part of opening agent and 0.1-0.5 part of slipping agent;
the core layer comprises the following components in parts by mass: 50-80 parts of polyamide, 10-20 parts of polyphenyl ether, 5-10 parts of PET resin, 5-10 parts of toughening agent, 2-5 parts of compatilizer, 1-5 parts of flame retardant, 0.1-1 part of antioxidant and 0.5-2 parts of lubricant;
the lower surface layer comprises the following components in parts by mass: 50-80 parts of polyamide, 10-20 parts of polyphenyl ether, 5-10 parts of PET (polyethylene terephthalate) resin, 5-10 parts of toughening agent, 2-5 parts of compatilizer, 1-5 parts of flame retardant, 0.1-1 part of antioxidant, 0.1-1 part of processing aid, 0.4-1 part of opening agent and 0.1-0.5 part of slipping agent.
Further, the polyamide is one or a combination of more of PA46, PA6T/66, PA6T/6, PA66T/6I/66, PA9T and PA 10T.
Further, the toughening agent is one or a combination of more of long carbon chain nylon, nylon elastomer and thermoplastic elastomer styrene-butadiene-styrene copolymer.
Further, the compatilizer is one or a combination of more of polyphenylene oxide grafted maleic anhydride and polyphenylene oxide grafted glycidyl methacrylate.
Further, the flame retardant is one or a combination of several of nano magnesium hydroxide and triphenyl phosphate.
Further, the lubricant is melamine cyanurate MCA.
Further, the processing aid is one or a combination of several of fluorine-containing polymer processing aid and silane processing aid.
Further, the opening agent is polytetrafluoroethylene micro powder.
Further, the slipping agent is one or a combination of several of erucamide, oleamide and PE wax powder.
The invention also provides a preparation method of the high-temperature-resistant flame-retardant polyamide, which comprises the following steps:
step one, uniformly mixing the components of the upper surface layer, the core layer and the lower surface layer in a high-speed mixer according to a ratio, extruding and granulating through a double-screw extruder, and drying water for later use; the temperature of the extruder is 295-330 ℃, the water temperature of the water tank is 50-70 ℃, the temperature of the oven is 60-90 ℃, and the water content of the particles is less than or equal to 1500 ppm;
melting the materials of the surface matte layer, the core layer and the surface functional layer through respective extruders, uniformly flowing out through a T-shaped die head, and cooling on a cold roll to form an unstretched sheet; wherein the temperature of the cold roll is 65-85 ℃, and the thickness of the unstretched sheet is 120-400 um;
step three, synchronously stretching the unstretched sheet by using a linear motor track in a heating state, wherein the stretching temperature is 250-300 ℃, and the stretching multiplying power is 2.5 x 2.5-3.0 x 3.0;
and step four, performing heat setting on the stretched film, wherein the setting temperature is 260-320 ℃, and the setting time is 40-120 s, and finally obtaining the high-temperature-resistant flame-retardant polyamide film, wherein the thickness of the film is 10-60 um.
Compared with the traditional polyamide film, the high-temperature-resistant flame-retardant polyamide film provided by the invention has the advantages that the flame retardant is matched with other specific components to enable the flame retardant grade of the film to reach the standard specification, and the film can be molded. The high-temperature-resistant flame-retardant polyamide film has excellent mechanical property, high-temperature resistance and flame retardance.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic view of a film structure of a high temperature resistant flame retardant polyamide film provided by the invention.
Reference numerals:
1 upper surface layer 2 core layer 3 lower surface layer
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.
In the description of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
It should be noted that the reagents or apparatuses used in the examples are not indicated by the manufacturer, but those not indicated by the specific techniques or conditions described in the literature in the art or by the specifications of the products are all conventional products commercially available.
Example 1
A high-temperature resistant flame-retardant polyamide film is of a three-layer film structure, wherein the structure of the film sequentially comprises an upper surface layer 1, a core layer 2 and a lower surface layer 3 from outside to inside;
the upper surface layer 1 comprises the following components: PA10T 70 parts, polyphenyl ether 15 parts, PET resin 7 parts, nylon elastomer 8 parts, PPO-g-MAH 3 parts, nano magnesium hydroxide 3 parts, antioxidant 10100.5 parts, vinylidene fluoride-hexafluoropropylene copolymer 0.5 part, polytetrafluoroethylene micro powder 0.5 part and ethylene bis stearamide 0.2 part;
the core layer 2 comprises the following components: PA10T 70, polyphenyl ether 15, nylon elastomer 8, PPO-g-MAH 3, nano magnesium hydroxide 3, antioxidant 10100.5 and MCA 1;
the lower surface layer 3 comprises the following components: PA10T 70 parts, polyphenyl ether 15 parts, nylon elastomer 8 parts, PPO-g-MAH 3 parts, nano magnesium hydroxide 3 parts, antioxidant 10100.5 parts, vinylidene fluoride-hexafluoropropylene copolymer 0.5 parts, silicon dioxide 0.5 parts, and ethylene bis stearamide 0.2 parts.
Example 2
A high-temperature resistant flame-retardant polyamide film is of a three-layer film structure, wherein the structure of the film sequentially comprises an upper surface layer 1, a core layer 2 and a lower surface layer 3 from outside to inside;
the upper surface layer 1 comprises the following components: PA10T 50 parts, polyphenyl ether 20 parts, PET resin 10 parts, nylon elastomer 10 parts, PPO-g-MAH 5 parts, nano magnesium hydroxide 5 parts, antioxidant 10101 parts, vinylidene fluoride-hexafluoropropylene copolymer 1 part, polytetrafluoroethylene micro powder 1 part and ethylene bis stearamide 0.5 part;
the core layer 2 comprises the following components: PA10T 50 parts, polyphenyl ether 20 parts, PET resin 10 parts, nylon elastomer 10 parts, PPO-g-MAH 5 parts, nano magnesium hydroxide 5 parts, antioxidant 10101 parts and MCA 2 parts;
the lower surface layer 3 comprises the following components: PA10T 50 parts, polyphenyl ether 20 parts, PET resin 10 parts, nylon elastomer 10 parts, PPO-g-MAH 5 parts, nano magnesium hydroxide 5 parts, antioxidant 10101 parts, vinylidene fluoride-hexafluoropropylene copolymer 1 part, polytetrafluoroethylene micro powder 1 part and ethylene bis stearamide 0.5 part.
Example 3
A high-temperature resistant flame-retardant polyamide film is of a three-layer film structure, wherein the structure of the film sequentially comprises an upper surface layer 1, a core layer 2 and a lower surface layer 3 from outside to inside;
the upper surface layer 1 comprises the following components: PA10T 80 parts, polyphenyl ether 10 parts, PET resin 5 parts, nylon elastomer 5 parts, PPO-g-MAH 2 parts, nano magnesium hydroxide 1 part, antioxidant 10100.1 parts, vinylidene fluoride-hexafluoropropylene copolymer 0.1 part, polytetrafluoroethylene micro powder 0.4 part and ethylene bis stearamide 0.1 part;
the core layer 2 comprises the following components: PA10T 80 parts, polyphenyl ether 10 parts, PET resin 5 parts, nylon elastomer 5 parts, PPO-g-MAH 2 parts, nano magnesium hydroxide 1 part, antioxidant 10100.1 parts and MCA 0.5 part;
the lower surface layer 3 comprises the following components: PA10T 80 parts, polyphenyl ether 10 parts, PET resin 5 parts, nylon elastomer 5 parts, PPO-g-MAH 2 parts, nano magnesium hydroxide 1 part, antioxidant 10100.1 parts, vinylidene fluoride-hexafluoropropylene copolymer 0.1 part, polytetrafluoroethylene micro powder 0.4 part and ethylene bis stearamide 0.1 part.
Example 4
A high-temperature resistant flame-retardant polyamide film is of a three-layer film structure, wherein the structure of the film sequentially comprises an upper surface layer 1, a core layer 2 and a lower surface layer 3 from outside to inside;
the upper surface layer 1 comprises the following components: PA 4670 parts, MPPO 15 parts, PET resin 7 parts, SBS 8 parts, PPO-g-MAH 3 parts, triphenyl phosphate 3 parts, antioxidant 2640.5 parts, Polydimethylsiloxane (PDMS)0.5 part, polytetrafluoroethylene micro powder 0.5 part and erucamide 0.2 part;
the core layer 2 comprises the following components: PA 4670 parts, MPPO 15 parts, PET resin 7 parts, SBS 8 parts, PPO-g-MAH 3 parts, triphenyl phosphate 3 parts, antioxidant 2640.5 parts and MCA 1 part;
the lower surface layer 3 comprises the following components: PA 4670 parts, MPPO 15 parts, PET resin 7 parts, SBS 8 parts, PPO-g-MAH 3 parts, triphenyl phosphate 3 parts, antioxidant 2640.5 parts, Polydimethylsiloxane (PDMS)0.5 part, polytetrafluoroethylene micropowder 0.5 part and erucamide 0.2 part.
The preparation of the above examples 1-4 was as follows:
step one, uniformly mixing the components of the upper surface layer, the core layer and the lower surface layer in a high-speed mixer according to a ratio, extruding and granulating through a double-screw extruder, and drying water for later use; the temperature of the extruder is 295-330 ℃, the water temperature of the water tank is 50-70 ℃, the temperature of the oven is 60-90 ℃, and the water content of the particles is less than or equal to 1500 ppm;
melting the materials of the surface matte layer, the core layer and the surface functional layer through respective extruders, uniformly flowing out through a T-shaped die head, and cooling on a cold roll to form an unstretched sheet; wherein the temperature of the cold roll is 65-85 ℃, and the thickness of the unstretched sheet is 120-400 um;
step three, synchronously stretching the unstretched sheet by using a linear motor track in a heating state, wherein the stretching temperature is 250-300 ℃, and the stretching multiplying power is 2.5 x 2.5-3.0 x 3.0;
and step four, performing heat setting on the stretched film, wherein the setting temperature is 260-320 ℃, and the setting time is 40-120 s, and finally obtaining the high-temperature-resistant flame-retardant polyamide film, wherein the thickness of the film is 25 um.
Comparative example 1
Biaxially oriented polyamide 6 film is available on the market.
Comparative example 2
A polyamide film is of a three-layer film structure, and the structure of the film sequentially comprises an upper surface layer 1, a core layer 2 and a lower surface layer 3 from outside to inside;
the upper surface layer 1 and the lower surface layer 3 comprise the following components: PA10T 100%;
the core layer 2 comprises the following components: PA10T 100%.
Since the upper surface layer 1, the core layer 2 and the lower surface layer 3 all use PA10T 100%, the operation of step one is omitted and the rest of the preparation steps are referred to in the examples.
Comparative example 3
A polyamide film is of a three-layer film structure, and the structure of the film sequentially comprises an upper surface layer 1, a core layer 2 and a lower surface layer 3 from outside to inside;
the upper surface layer 1 comprises the following components: PA 4668, polyphenyl ether 30, silicon dioxide 1 and ethylene bisstearamide 1;
the core layer 2 comprises the following components: PA 4650 parts, polyphenyl ether 30 parts and magnesium hydroxide 20 parts;
the lower surface layer 3 comprises the following components: PA 4668 parts, polyphenylene oxide 30 parts, silicon dioxide 1 part and ethylene bisstearamide 1 part.
The preparation method is shown in the examples, but finally the film cannot be formed.
Comparative example 4
A polyamide film is of a three-layer film structure, and the structure of the film sequentially comprises an upper surface layer 1, a core layer 2 and a lower surface layer 3 from outside to inside;
the upper surface layer 1 comprises the following components: PA 4692 parts, silicon dioxide 1 parts, ethylene bis stearamide 1 parts, and magnesium hydroxide 5 parts;
the core layer 2 comprises the following components: PA 4695 parts and magnesium hydroxide 5 parts;
the lower surface layer 3 comprises the following components: PA 4692 parts, silicon dioxide 1 parts, ethylene bis stearamide 1 parts, and magnesium hydroxide 5 parts.
See the examples for their preparation.
The films of examples and comparative examples were subjected to experimental tests, and the test results are shown in table 1:
wherein, the high temperature resistance test: and (3) placing the film in a mold in a certain temperature environment, preserving heat for 3 minutes, observing whether the surface color of the film is discolored, wherein the highest temperature without discoloring is the high-temperature resistance temperature.
TABLE 1
Note: the film forming performance is evaluated by four grades of good middle difference according to the stability in the film forming production process and the thickness deviation of a finished product.
As can be seen from the above table, examples 1 to 4 provided by the present invention all have excellent high temperature resistance and mechanical properties, and all have flame retardant rating V0And the standard is reached. Comparative example 4 in comparison with examples 1 to 4, although comparative example 4 was also added with magnesium hydroxide as a flame retardant and the amount of the flame retardant was controlled to enable film formation, the flame retardant rating was V1Below the flame retardant rating of the inventive examples.
Therefore, the polyamide film prepared by the method has excellent mechanical property, high temperature resistance and flame retardant property through a special component formula.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A high-temperature-resistant flame-retardant polyamide film is characterized in that: the film comprises a three-layer superposed film structure, wherein the film structure sequentially comprises an upper surface layer, a core layer and a lower surface layer from outside to inside;
the upper surface layer comprises the following components in parts by mass: 50-80 parts of polyamide, 10-20 parts of polyphenyl ether, 5-10 parts of PET (polyethylene terephthalate) resin, 5-10 parts of toughening agent, 2-5 parts of compatilizer, 1-5 parts of flame retardant, 0.1-1 part of antioxidant, 0.1-1 part of processing aid, 0.4-1 part of opening agent and 0.1-0.5 part of slipping agent;
the core layer comprises the following components in parts by mass: 50-80 parts of polyamide, 10-20 parts of polyphenyl ether, 5-10 parts of PET resin, 5-10 parts of toughening agent, 2-5 parts of compatilizer, 1-5 parts of flame retardant, 0.1-1 part of antioxidant and 0.5-2 parts of lubricant;
the lower surface layer comprises the following components in parts by mass: 50-80 parts of polyamide, 10-20 parts of polyphenyl ether, 5-10 parts of PET (polyethylene terephthalate) resin, 5-10 parts of toughening agent, 2-5 parts of compatilizer, 1-5 parts of flame retardant, 0.1-1 part of antioxidant, 0.1-1 part of processing aid, 0.4-1 part of opening agent and 0.1-0.5 part of slipping agent.
2. The high temperature resistant flame retardant polyamide film of claim 1, characterized in that: the polyamide is one or a combination of more of PA46, PA6T/66, PA6T/6, PA66T/6I/66, PA9T and PA 10T.
3. The high temperature resistant flame retardant polyamide film of claim 1, characterized in that: the toughening agent is one or a combination of more of long carbon chain nylon, nylon elastomer and thermoplastic elastomer styrene-butadiene-styrene copolymer.
4. The high temperature resistant flame retardant polyamide film of claim 1, characterized in that: the compatilizer is one or a combination of more of polyphenyl ether grafted maleic anhydride and polyphenyl ether grafted glycidyl methacrylate.
5. The high temperature resistant flame retardant polyamide film of claim 1, characterized in that: the flame retardant is one or a combination of several of nano magnesium hydroxide and triphenyl phosphate.
6. The high temperature resistant flame retardant polyamide film of claim 1, characterized in that: the lubricant is melamine cyanurate MCA.
7. The high temperature resistant flame retardant polyamide film of claim 1, characterized in that: the processing aid is one or a combination of more of a fluorine-containing polymer processing aid and a silane processing aid.
8. The high temperature resistant flame retardant polyamide film of claim 1, characterized in that: the opening agent is polytetrafluoroethylene micro powder.
9. The high temperature resistant flame retardant polyamide film of claim 1, characterized in that: the slipping agent is one or a combination of more of erucamide, oleamide and PE wax powder.
10. The preparation method of the high-temperature-resistant flame-retardant polyamide is characterized by comprising the following steps of:
step one, uniformly mixing the components of the upper surface layer, the core layer and the lower surface layer in a high-speed mixer according to a ratio, extruding and granulating through a double-screw extruder, and drying water for later use; the temperature of the extruder is 295-330 ℃, the water temperature of the water tank is 50-70 ℃, the temperature of the oven is 60-90 ℃, and the water content of the particles is less than or equal to 1500 ppm;
melting the materials of the surface matte layer, the core layer and the surface functional layer through respective extruders, uniformly flowing out through a T-shaped die head, and cooling on a cold roll to form an unstretched sheet; wherein the temperature of the cold roll is 65-85 ℃, and the thickness of the unstretched sheet is 120-400 um;
step three, synchronously stretching the unstretched sheet by using a linear motor track in a heating state, wherein the stretching temperature is 250-300 ℃, and the stretching multiplying power is 2.5 x 2.5-3.0 x 3.0;
and step four, performing heat setting on the stretched film, wherein the setting temperature is 260-320 ℃, and the setting time is 40-120 s, and finally obtaining the high-temperature-resistant flame-retardant polyamide film, wherein the thickness of the film is 10-60 um.
Priority Applications (1)
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| CN114193887A (en) * | 2021-12-04 | 2022-03-18 | 宁波瑞成包装材料有限公司 | Production method of waterproof heat-resistant BOPA film |
| CN114714726A (en) * | 2022-02-21 | 2022-07-08 | 浙江华正能源材料有限公司 | Aluminum plastic film and preparation method and application thereof |
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| CN114714726A (en) * | 2022-02-21 | 2022-07-08 | 浙江华正能源材料有限公司 | Aluminum plastic film and preparation method and application thereof |
| CN114714726B (en) * | 2022-02-21 | 2024-04-05 | 浙江华正能源材料有限公司 | Aluminum plastic film and preparation method and application thereof |
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