CN111534090A - Cavity type nylon heat insulation strip and preparation method thereof - Google Patents
Cavity type nylon heat insulation strip and preparation method thereof Download PDFInfo
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- CN111534090A CN111534090A CN202010488533.4A CN202010488533A CN111534090A CN 111534090 A CN111534090 A CN 111534090A CN 202010488533 A CN202010488533 A CN 202010488533A CN 111534090 A CN111534090 A CN 111534090A
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- 239000004677 Nylon Substances 0.000 title claims abstract description 39
- 229920001778 nylon Polymers 0.000 title claims abstract description 39
- 238000009413 insulation Methods 0.000 title claims abstract description 33
- 238000002360 preparation method Methods 0.000 title abstract description 11
- 229920001661 Chitosan Polymers 0.000 claims abstract description 35
- 238000003756 stirring Methods 0.000 claims abstract description 31
- 238000001125 extrusion Methods 0.000 claims abstract description 22
- 239000003365 glass fiber Substances 0.000 claims abstract description 22
- 238000001035 drying Methods 0.000 claims abstract description 13
- 239000004594 Masterbatch (MB) Substances 0.000 claims abstract description 11
- 229920002302 Nylon 6,6 Polymers 0.000 claims abstract description 11
- 229920001296 polysiloxane Polymers 0.000 claims abstract description 11
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 9
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 9
- 229920002292 Nylon 6 Polymers 0.000 claims abstract description 8
- 239000007822 coupling agent Substances 0.000 claims abstract description 8
- 239000002270 dispersing agent Substances 0.000 claims abstract description 8
- 239000002667 nucleating agent Substances 0.000 claims abstract description 8
- 238000002156 mixing Methods 0.000 claims abstract description 3
- 239000002994 raw material Substances 0.000 claims abstract description 3
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims description 33
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 claims description 14
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 14
- 239000000463 material Substances 0.000 claims description 14
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 13
- 239000004372 Polyvinyl alcohol Substances 0.000 claims description 10
- 239000004113 Sepiolite Substances 0.000 claims description 10
- 239000000835 fiber Substances 0.000 claims description 10
- 229920002451 polyvinyl alcohol Polymers 0.000 claims description 10
- 235000019355 sepiolite Nutrition 0.000 claims description 10
- 229910052624 sepiolite Inorganic materials 0.000 claims description 10
- 238000000678 plasma activation Methods 0.000 claims description 8
- 230000003213 activating effect Effects 0.000 claims description 7
- WPYMKLBDIGXBTP-UHFFFAOYSA-N benzoic acid Chemical group OC(=O)C1=CC=CC=C1 WPYMKLBDIGXBTP-UHFFFAOYSA-N 0.000 claims description 7
- 239000001569 carbon dioxide Substances 0.000 claims description 7
- 229910002092 carbon dioxide Inorganic materials 0.000 claims description 7
- 238000001914 filtration Methods 0.000 claims description 7
- 238000005469 granulation Methods 0.000 claims description 7
- 230000003179 granulation Effects 0.000 claims description 7
- 238000001556 precipitation Methods 0.000 claims description 7
- 238000007873 sieving Methods 0.000 claims description 7
- 238000001694 spray drying Methods 0.000 claims description 7
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 7
- XECAHXYUAAWDEL-UHFFFAOYSA-N acrylonitrile butadiene styrene Chemical compound C=CC=C.C=CC#N.C=CC1=CC=CC=C1 XECAHXYUAAWDEL-UHFFFAOYSA-N 0.000 claims description 4
- 239000004676 acrylonitrile butadiene styrene Substances 0.000 claims description 4
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 claims description 4
- FPYJFEHAWHCUMM-UHFFFAOYSA-N maleic anhydride Chemical compound O=C1OC(=O)C=C1 FPYJFEHAWHCUMM-UHFFFAOYSA-N 0.000 claims description 4
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000000806 elastomer Substances 0.000 claims description 3
- 229920001912 maleic anhydride grafted polyethylene Polymers 0.000 claims description 3
- 229920001910 maleic anhydride grafted polyolefin Polymers 0.000 claims description 3
- 229920001911 maleic anhydride grafted polypropylene Polymers 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 125000003368 amide group Chemical group 0.000 claims description 2
- 230000008569 process Effects 0.000 claims description 2
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims 1
- 238000000465 moulding Methods 0.000 abstract description 6
- 238000002844 melting Methods 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 150000001408 amides Chemical class 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 229910000838 Al alloy Inorganic materials 0.000 description 3
- 238000005452 bending Methods 0.000 description 3
- 239000011162 core material Substances 0.000 description 3
- KGRVJHAUYBGFFP-UHFFFAOYSA-N 2,2'-Methylenebis(4-methyl-6-tert-butylphenol) Chemical compound CC(C)(C)C1=CC(C)=CC(CC=2C(=C(C=C(C)C=2)C(C)(C)C)O)=C1O KGRVJHAUYBGFFP-UHFFFAOYSA-N 0.000 description 2
- IKEHOXWJQXIQAG-UHFFFAOYSA-N 2-tert-butyl-4-methylphenol Chemical compound CC1=CC=C(O)C(C(C)(C)C)=C1 IKEHOXWJQXIQAG-UHFFFAOYSA-N 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- UDFARPRXWMDFQU-UHFFFAOYSA-N 2,6-ditert-butyl-4-[(3,5-ditert-butyl-4-hydroxyphenyl)methylsulfanylmethyl]phenol Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CSCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 UDFARPRXWMDFQU-UHFFFAOYSA-N 0.000 description 1
- 125000003277 amino group Chemical group 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000003086 colorant Substances 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 239000002530 phenolic antioxidant Substances 0.000 description 1
- 238000004321 preservation Methods 0.000 description 1
Classifications
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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
- C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/08—Stabilised against heat, light or radiation or oxydation
-
- 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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
-
- 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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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention discloses a cavity type nylon heat insulation strip which comprises the following raw materials in parts by weight: nylon 66100 parts, nylon 620-30 parts, chitosan graft 4-10 parts, glass fiber 10-20 parts, glass fiber dispersant 0.5-1.5 parts, coupling agent 1-2 parts, antioxidant 1-2 parts, nucleating agent 1-2 parts, silicone master batch 1-2 parts, and compatilizer 1-2 parts. The invention discloses a preparation method of the cavity type nylon heat insulation strip, which comprises the following steps: uniformly mixing nylon 66, nylon 6 and chitosan grafts, adding glass fiber, glass fiber dispersing agent, coupling agent, antioxidant, nucleating agent, silicone master batch and compatilizer, uniformly stirring, feeding into a double-screw extruder, melting, extruding and granulating, drying, and performing extrusion molding, wherein the extrusion temperature is 240-plus-one-class 260 ℃, the rotating speed of the extruder is 200-plus-one-class 250r/min, and the molding temperature is 280-plus-one-class 300 ℃ to obtain the cavity type nylon heat insulation strip.
Description
Technical Field
The invention relates to the technical field of heat insulation strips, in particular to a hollow cavity type nylon heat insulation strip and a preparation method thereof.
Background
Along with the improvement of living standard and living environment of people, the requirements of high heat preservation and energy conservation in northern severe cold areas are continuously improved, and the requirements of doors, windows and curtain walls of buildings are also continuously improved. More and more aluminum alloy heat-insulating energy-saving doors and windows or curtain walls are adopted on buildings, and the aluminum alloy heat-insulating energy-saving doors and windows or curtain walls not only can enable the structural rigidity to meet the requirements, but also are light and attractive, can realize the functions of internal and external double colors and the like, and are convenient for the installation of corresponding accessories.
However, the heat insulation performance of the current aluminum alloy window still cannot meet the requirement, and the reason is mainly that outdoor gas easily enters into the room from gaps between the window sash and the window frame and between the window sash and the double-layer vacuum glass due to unreasonable heat insulation strips and unreasonable connection structures arranged in the window sash, so that the indoor temperature is influenced, and great inconvenience is brought to a user. The cavity type nylon heat insulating strip is because its simple structure, can effectually avoid outdoor gas to enter into indoorly from the clearance between casement and window frame, casement and the double-deck vacuum glass, and thermal-insulated effect is fabulous, consequently is widely used at present, nevertheless because cavity type nylon heat insulating strip exists the heat resistance at present poorly, and tensile strength has satisfied the technical problem that the demand has not been satisfied, needs urgent solution.
Disclosure of Invention
Based on the technical problems in the background art, the invention provides a hollow cavity type nylon heat insulation strip and a preparation method thereof.
A hollow cavity type nylon heat insulation strip comprises the following raw materials in parts by weight: nylon 66100 parts, nylon 620-30 parts, chitosan graft 4-10 parts, glass fiber 10-20 parts, glass fiber dispersant 0.5-1.5 parts, coupling agent 1-2 parts, antioxidant 1-2 parts, nucleating agent 1-2 parts, silicone master batch 1-2 parts, and compatilizer 1-2 parts.
Preferably, the compatibilizer is at least one of maleic anhydride grafted polyethylene, maleic anhydride grafted polyolefin elastomer, maleic anhydride grafted polypropylene, and maleic anhydride grafted acrylonitrile-butadiene-styrene copolymer.
Preferably, the antioxidant is a hindered phenolic antioxidant.
Preferably, the coupling agent is a silane coupling agent, and preferably at least one of the silane coupling agent KH-550, the silane coupling agent KH-560 and the silane coupling agent KH-570.
Preferably, the chitosan graft is prepared by adopting the following process: dissolving chitosan in acetic acid solution, adding sepiolite fiber, stirring, adding ethanol for precipitation, filtering, drying, crushing and sieving, sending into a plasma activation instrument, adjusting the pressure to be 150Pa, activating by using plasma carbon dioxide gas, adding polyvinyl alcohol and water into the product, stirring for 20-40s at the temperature of 120 ℃ and 150 ℃, and spray-drying to obtain the chitosan graft.
Preferably, the mass fraction of the acetic acid solution is 1.5-2%, and the mass ratio of the chitosan to the acetic acid solution to the sepiolite fibers to the polyvinyl alcohol is 10-16: 40-60: 5-15: 2-6.
Preferably, the glass fiber dispersant is an amide wax.
Preferably, the nucleating agent is a benzoate salt.
The preparation method of the cavity type nylon heat insulation strip comprises the following steps:
uniformly mixing nylon 66, nylon 6 and chitosan graft to obtain a base material;
adding glass fiber, glass fiber dispersing agent, coupling agent, antioxidant, nucleating agent, silicone master batch and compatilizer into the base material, and uniformly stirring to obtain premix;
and feeding the premix into a double-screw extruder, performing melt extrusion granulation at the extrusion temperature of 240-.
The technical effects of the invention are as follows:
in the chitosan graft, the sepiolite fiber is used as a core material, the surface of the core material is coated with chitosan, the mobility is excellent, the surface area of the core material can be effectively enhanced and the bonding strength with polyvinyl alcohol can be increased after plasma activation treatment, and the obtained chitosan graft not only has extremely high tensile strength, but also has extremely good heat-resistant stability.
Because the nylon 66 has poor heat resistance, the chitosan graft is added and compounded with the glass fiber, so that the compatibility of the glass fiber in the nylon 66 can be effectively enhanced, the chitosan graft can be subjected to graft reaction with the terminal amino group of the nylon 66 through melt extrusion, molecular chains are entangled, the dispersion and combination degree of the glass fiber in the chitosan graft are extremely high, the tensile strength is further enhanced, and the thermal stability is extremely excellent; the cavity type nylon heat insulation strip obtained by the invention has the advantages of good heat insulation effect, thermal conductivity coefficient of below 0.2W/(m.K), good heat resistance, excellent tensile strength, excellent dimensional stability, excellent bending strength and higher comprehensive performance, and can be widely applied to heat insulation strips of various door and window frames.
Detailed Description
The technical solution of the present invention will be described in detail below with reference to specific examples.
Example 1
A preparation method of a hollow cavity type nylon heat insulation strip comprises the following steps:
dissolving 10kg of chitosan in 60kg of acetic acid solution with the mass fraction of 1.5%, adding 15kg of sepiolite fibers, stirring at the speed of 150r/min for 2h, adding ethanol for precipitation, filtering, drying, crushing, sieving with a 200-mesh sieve, feeding into a plasma activation instrument, adjusting the pressure to 100Pa, activating with plasma carbon dioxide gas for 5min, adding 2kg of polyvinyl alcohol and 50kg of water into the product, stirring at 120 ℃ for 40s, and spray-drying to obtain a chitosan graft;
feeding 100kg of nylon 66, 20kg of nylon 6 and 10kg of chitosan graft into a high-speed mixer, and uniformly stirring at a high speed of 1000r/min to obtain a base material; adding 20kg of glass fiber, 0.5kg of amide wax, 2kg of silane coupling agent KH-550, 1kg of 2-tert-butyl-4-methylphenol, 2kg of benzoate, 1kg of silicone master batch and 2kg of maleic anhydride grafted acrylonitrile-butadiene-styrene copolymer into the base material, and uniformly stirring at the stirring speed of 200r/min to obtain a premix;
and (2) feeding the premix into a double-screw extruder, performing melt extrusion granulation at the extrusion temperature of 260 ℃ and the rotation speed of the extruder of 200r/min, drying, and performing extrusion molding at the molding temperature of 300 ℃ to obtain the hollow cavity type nylon heat insulation strip.
Example 2
A preparation method of a hollow cavity type nylon heat insulation strip comprises the following steps:
dissolving 16kg of chitosan in 40kg of acetic acid solution with the mass fraction of 2%, adding 5kg of sepiolite fibers, stirring at the speed of 200r/min for 1h, adding ethanol for precipitation, filtering, drying, crushing, sieving by a 200-mesh sieve, feeding into a plasma activation instrument, adjusting the pressure to 150Pa, activating by plasma carbon dioxide gas for 2min, adding 6kg of polyvinyl alcohol and 30kg of water into the product, stirring at 150 ℃ for 20s, and performing spray drying to obtain a chitosan graft;
feeding 100kg of nylon 66, 30kg of nylon 6 and 4kg of chitosan graft into a high-speed mixer, and uniformly stirring at a high speed of 1200r/min to obtain a base material; adding 10kg of glass fiber, 1.5kg of amide wax, 1kg of silane coupling agent KH-560, 2kg of 2, 2' -methylenebis (4-methyl-6-tert-butylphenol), 1kg of benzoate, 2kg of silicone master batch and 1kg of maleic anhydride grafted acrylonitrile-butadiene-styrene copolymer into the base material, and uniformly stirring at the stirring speed of 300r/min to obtain a premix;
and (3) feeding the premix into a double-screw extruder, performing melt extrusion granulation at the extrusion temperature of 240 ℃ and the rotation speed of the extruder of 250r/min, drying, and performing extrusion molding at the molding temperature of 280 ℃ to obtain the hollow cavity type nylon heat insulation strip.
Example 3
A preparation method of a hollow cavity type nylon heat insulation strip comprises the following steps:
dissolving 12kg of chitosan in 55kg of acetic acid solution with the mass fraction of 1.6%, adding 12kg of sepiolite fibers, stirring at the speed of 160r/min for 1.7h, adding ethanol for precipitation, filtering, drying, crushing, sieving with a 200-mesh sieve, feeding into a plasma activation instrument, adjusting the pressure to 120Pa, activating with plasma carbon dioxide gas for 4min, adding 3kg of polyvinyl alcohol and 45kg of water into the product, stirring at 130 ℃ for 35s, and spray-drying to obtain a chitosan graft;
feeding 100kg of nylon 66, 22kg of nylon 6 and 8kg of chitosan graft into a high-speed mixer, and uniformly stirring at a high speed of 1050r/min to obtain a base material; adding 18kg of glass fiber, 0.8kg of amide wax, 1.7kg of silane coupling agent KH-570, 1.3kg of bis (3, 5-di-tert-butyl-4-hydroxybenzyl) sulfide, 1.8kg of benzoate, 1.2kg of silicone master batch and 1.7kg of maleic anhydride grafted polypropylene into the base material, and uniformly stirring at the stirring speed of 220r/min to obtain a premix;
and (3) feeding the premix into a double-screw extruder, performing melt extrusion granulation at the extrusion temperature of 255 ℃ and the rotation speed of the extruder of 220r/min, drying, and performing extrusion molding at the molding temperature of 295 ℃ to obtain the cavity type nylon heat insulation strip.
Example 4
A preparation method of a hollow cavity type nylon heat insulation strip comprises the following steps:
dissolving 14kg of chitosan in 45kg of acetic acid solution with the mass fraction of 1.8%, adding 8kg of sepiolite fibers, stirring at the speed of 180r/min for 1.3h, adding ethanol for precipitation, filtering, drying, crushing, sieving with a 200-mesh sieve, feeding into a plasma activation instrument, adjusting the pressure to 140Pa, activating with plasma carbon dioxide gas for 3min, adding 5kg of polyvinyl alcohol and 35kg of water into the product, stirring at 140 ℃ for 25s, and spray-drying to obtain a chitosan graft;
100kg of nylon 66, 28kg of nylon 6 and 6kg of chitosan graft are sent into a high-speed mixer to be uniformly stirred at a high speed of 1150r/min to obtain a base material; adding 12kg of glass fiber, 1.2kg of amide wax, 1.3kg of silane coupling agent KH-560, 1.7kg of 2, 2' -methylene bis (4-methyl-6-tert-butylphenol), 1.2kg of benzoate, 1.8kg of silicone master batch and 1.3kg of maleic anhydride grafted polyolefin elastomer into the base material, and uniformly stirring at the stirring speed of 280r/min to obtain a premix;
and (3) feeding the premix into a double-screw extruder, performing melt extrusion granulation at the extrusion temperature of 245 ℃ and the rotation speed of the extruder of 240r/min, drying, and performing extrusion molding at the molding temperature of 285 ℃ to obtain the hollow cavity type nylon heat insulation strip.
Example 5
A preparation method of a hollow cavity type nylon heat insulation strip comprises the following steps:
dissolving 13kg of chitosan in 50kg of acetic acid solution with the mass fraction of 1.7%, adding 10kg of sepiolite fibers, stirring at the speed of 170r/min for 1.5h, adding ethanol for precipitation, filtering, drying, crushing, sieving with a 200-mesh sieve, feeding into a plasma activation instrument, adjusting the pressure to 130Pa, activating with plasma carbon dioxide gas for 3.5min, adding 4kg of polyvinyl alcohol and 40kg of water into the product, stirring at 135 ℃ for 30s, and spray-drying to obtain a chitosan graft;
feeding 100kg of nylon 66, 25kg of nylon 6 and 7kg of chitosan graft into a high-speed mixer, and uniformly stirring at a high speed of 1100r/min to obtain a base material; adding 15kg of glass fiber, 1kg of amide wax, 1.5kg of silane coupling agent KH-550, 1.5kg of 2-tert-butyl-4-methylphenol, 1.5kg of benzoate, 1.5kg of silicone master batch and 1.5kg of maleic anhydride grafted polyethylene into the base material, and uniformly stirring at the stirring speed of 250r/min to obtain a premix;
and (3) feeding the premix into a double-screw extruder, performing melt extrusion granulation at the extrusion temperature of 250 ℃ and the rotation speed of the extruder of 230r/min, drying, and performing extrusion molding at the molding temperature of 290 ℃ to obtain the cavity type nylon heat insulation strip.
The performance of the cavity type nylon heat insulation strip obtained in the embodiment 3-5 is tested, and the test result is as follows:
the tensile strength is detected according to GB 1040, and the test condition is 50 mm/min; the bending strength is detected according to GB 9341, 2 mm/min; detecting the thermal deformation temperature according to GB 1634, wherein the test condition is 1.8Mpa multiplied by 6.4 min; the thermal conductivity was measured according to GB 3139.
From the above results, it can be seen that: the cavity type nylon heat insulation strip obtained by the invention has the advantages of good heat insulation effect, thermal conductivity coefficient of below 0.2W/(m.K), good heat resistance, excellent tensile strength, excellent dimensional stability, excellent bending strength and higher comprehensive performance, and can be widely applied to heat insulation strips of various door and window frames.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and the inventive concepts thereof according to the present invention should be equivalent or changed within the scope of the present invention.
Claims (9)
1. A hollow cavity type nylon heat insulation strip is characterized by comprising the following raw materials in parts by weight: nylon 66100 parts, nylon 620-30 parts, chitosan graft 4-10 parts, glass fiber 10-20 parts, glass fiber dispersant 0.5-1.5 parts, coupling agent 1-2 parts, antioxidant 1-2 parts, nucleating agent 1-2 parts, silicone master batch 1-2 parts, and compatilizer 1-2 parts.
2. A cavity type nylon thermal insulating strip as claimed in claim 1, wherein the compatibilizer is at least one of maleic anhydride grafted polyethylene, maleic anhydride grafted polyolefin elastomer, maleic anhydride grafted polypropylene, and maleic anhydride grafted acrylonitrile-butadiene-styrene copolymer.
3. A cavity type nylon heat insulating strip as claimed in claim 1, wherein the antioxidant is hindered phenol antioxidant.
4. The cavity type nylon heat insulation strip as claimed in claim 1, wherein the coupling agent is a silane coupling agent, preferably at least one of a silane coupling agent KH-550, a silane coupling agent KH-560 and a silane coupling agent KH-570.
5. A cavity type nylon heat insulation strip as defined in claim 1, wherein the chitosan graft is prepared by the following process: dissolving chitosan in acetic acid solution, adding sepiolite fiber, stirring, adding ethanol for precipitation, filtering, drying, crushing and sieving, sending into a plasma activation instrument, adjusting the pressure to be 150Pa, activating by using plasma carbon dioxide gas, adding polyvinyl alcohol and water into the product, stirring for 20-40s at the temperature of 120 ℃ and 150 ℃, and spray-drying to obtain the chitosan graft.
6. A cavity type nylon heat insulation strip as claimed in claim 5, wherein the mass fraction of the acetic acid solution is 1.5-2%, and the mass ratio of the chitosan, the acetic acid solution, the sepiolite fiber and the polyvinyl alcohol is 10-16: 40-60: 5-15: 2-6.
7. A cavity type nylon thermal insulating strip as claimed in claim 1, wherein the glass fiber dispersing agent is amide wax.
8. A cavity type nylon heat insulating strip as claimed in claim 1, wherein the nucleating agent is benzoate.
9. A method for preparing a hollow nylon heat-insulating strip as defined in any one of claims 1-8, comprising the following steps:
uniformly mixing nylon 66, nylon 6 and chitosan graft to obtain a base material;
adding glass fiber, glass fiber dispersing agent, coupling agent, antioxidant, nucleating agent, silicone master batch and compatilizer into the base material, and uniformly stirring to obtain premix;
and feeding the premix into a double-screw extruder, performing melt extrusion granulation at the extrusion temperature of 240-.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112126225A (en) * | 2020-09-24 | 2020-12-25 | 安徽优泰新材料有限公司 | High-temperature-resistant and high-strength nylon heat insulation strip and manufacturing method thereof |
| CN116731509A (en) * | 2023-07-05 | 2023-09-12 | 河南神马华威塑胶股份有限公司 | Nylon 66 toughened heat insulation strip and preparation method thereof |
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Application publication date: 20200814 |