CN111087801A - Bio-based polyamide 56 material for heat insulation strip, preparation method and heat insulation strip - Google Patents
Bio-based polyamide 56 material for heat insulation strip, preparation method and heat insulation strip Download PDFInfo
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- CN111087801A CN111087801A CN201811242875.7A CN201811242875A CN111087801A CN 111087801 A CN111087801 A CN 111087801A CN 201811242875 A CN201811242875 A CN 201811242875A CN 111087801 A CN111087801 A CN 111087801A
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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
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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
- C08K2201/014—Additives containing two or more different additives of the same subgroup in C08K
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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
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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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
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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
- C08L2205/24—Crystallisation aids
Abstract
The invention provides a bio-based polyamide 56 material for a heat insulation strip, a preparation method and the heat insulation strip. The bio-based polyamide 56 material for the heat insulation strip comprises the following raw materials in parts by weight per 100 parts: 0.05-1 part of nucleating agent, 10-40 parts of glass fiber, 0.05-1 part of lubricant, 0.05-1 part of antioxidant and the balance of polyamide 56. The bio-based polyamide 56 material for the heat insulation strip can be prepared by adopting renewable substances as main raw materials, and is green and environment-friendly. The bio-based polyamide 56 material has the advantages of high crystallization rate and complete crystallization in the processing process, easy demoulding in extrusion forming and short extrusion forming time. The heat insulation strip prepared from the bio-based polyamide 56 material has high mechanical strength and good dimensional stability.
Description
Technical Field
The invention relates to a bio-based polyamide 56 material for a heat insulation strip, a preparation method and the heat insulation strip, and belongs to the technical field of high polymer materials.
Background
Due to the excellent mechanical properties and forming properties of polyamide, such as excellent linear coefficient, high transverse tensile strength, high aging strength, high dimensional accuracy, stability and the like, polyamide is commonly used for heat insulating strips in the aluminum alloy industry, and is particularly widely applied to bridge-cut-off aluminum structures as the heat insulating strips. In particular, the insulating strips can reduce heat conduction and prevent condensation, and thus are critical to the thermal insulation of the window, while also reducing noise.
The existing heat insulating strip is poor in dimensional stability, polyamide used for manufacturing the heat insulating strip at the present stage is made of petroleum, and with the increasing exhaustion of energy sources and the rising of petroleum price, the heat insulating strip with low cost, environmental friendliness and high dimensional stability is urgently needed at the present stage.
Disclosure of Invention
The invention aims to provide a bio-based polyamide 56 material for a heat insulation strip and a preparation method thereof. The invention also aims to provide the thermal insulation strip processed by the bio-based polyamide 56 material for the thermal insulation strip.
The polyamide 56 used in the bio-based polyamide 56 material for the heat insulation strip can be prepared from renewable substances, and is green and environment-friendly. In the process of preparing the bio-based polyamide 56 material for the heat insulation strip, the polyamide 56 has high crystallization rate and more complete crystallization, is easy to be extruded and drawn for forming, and shortens the processing time. The bio-based polyamide 56 material and the heat insulation strip processed by the same have good dimensional stability and high mechanical strength.
The invention provides a bio-based polyamide 56 material for a heat insulation strip, which comprises the following raw materials in 100 parts by weight: 0.05-1 part of nucleating agent, 10-40 parts of glass fiber, 0.05-1 part of lubricant, 0.05-1 part of antioxidant and the balance of polyamide 56.
Preferably, the bio-based polyamide 56 material for the heat insulation strip comprises the following raw materials in parts by weight per 100 parts by weight: 0.05-0.5 part of nucleating agent, 15-30 parts of glass fiber, 0.05-0.5 part of lubricant, 0.05-0.5 part of antioxidant and the balance of polyamide 56.
Preferably, the bio-based polyamide 56 material for the heat insulation strip comprises the following raw materials in parts by weight per 100 parts by weight: 0.05-0.5 part of nucleating agent, 25 parts of glass fiber, 0.05-0.5 part of lubricant, 0.05-0.5 part of antioxidant and the balance of polyamide 56.
The polyamide 56 used according to the invention, i.e. PA56, is produced from at least pentanediamine and adipic acid. Pentanediamines are made by biological fermentation (e.g., by decarboxylation of lysine under the action of a decarboxylase) and contain organic carbon of renewable origin that at least partially meets the ASTM D6866 standard. Therefore, the polyamide 56 used as the main raw material for the preparation of the present invention is more environmentally friendly. Secondly, the PA56 has good mechanical strength, so that the bio-based polyamide 56 material for the thermal insulation strip has high strength characteristic.
The bio-based polyamide 56 material for the heat insulating strip of the invention is supplemented with glass fiber, the glass fiber is randomly distributed in other raw materials (PA56, nucleating agent, lubricant and antioxidant) to be beneficial to improving the mechanical strength of the heat insulating strip, and after a great deal of research of the inventor, when the other raw materials and the weight parts meet the above limitation, the weight parts of the glass fiber are 10-40 parts, preferably 15-30 parts, and especially 25 parts, the mechanical strength (tensile strength, bending strength and impact strength) of the heat insulating strip can be obviously increased. In addition, the glass fiber also contributes to crystallization of the polyamide 56 to a certain extent, improves the crystallization rate, and promotes the polyamide 56 to be more completely crystallized, so that the polyamide 56 material and the thermal insulation strip processed by the polyamide 56 material have good dimensional stability.
In addition, the nucleating agent adopted in the invention can accelerate the crystallization rate of the bio-based polyamide 56 material for the heat insulation strip in the preparation process, on one hand, the extrusion molding period is shortened, and the extrusion molding is easy, and on the other hand, the nucleating agent is added, so that the polyamide crystallization is more complete and the size stability of the heat insulation strip product is improved.
Further, the viscosity number of the polyamide 56 is 2.0 to 4.0.
By controlling the viscosity number of the polyamide 56, the mechanical property of the heat insulation strip can be optimized and the preparation process can be simplified. Specifically, if the viscosity number of the polyamide 56 is too low, the prepared bio-based polyamide 56 material for the heat insulation strip has poor mechanical properties; if the viscosity number of the polyamide 56 is too high, the bio-based polyamide 56 material for the heat insulation strip is difficult to process and form, and the preparation difficulty is high.
Further, the nucleating agent is selected from one or more of nucleating agent P22, montmorillonite and talcum powder. Preferably, the nucleating agent is a mixture of the nucleating agent P22, montmorillonite and talcum powder, and the mass ratio of the nucleating agent P22 to the montmorillonite to the talcum powder is (1-10): (1-10): (1-10), preferably (1-6): (1-6): (1-6), more preferably (1-3): (1-3): (1-3).
Further, the length of the glass fiber is 1-6 mm. Preferably, the glass fibers have a length of one of 3.0mm, 4.0mm and 4.5 mm.
Further, the lubricant is selected from one or more of montan wax, amide wax, calcium stearate and ethylene bis-stearic acid amide (abbreviation: EBS). When the lubricant of the present invention is a mixture of the above-mentioned substances, the present invention does not limit the ratio between the respective substances.
Further, the antioxidant is selected from one or more of antioxidant 168, antioxidant 1098, antioxidant 1010 and antioxidant S9228. When the antioxidant of the present invention is a mixture of the above-mentioned plural substances, the present invention does not limit the ratio between the respective substances.
Specifically, polyamide 56, a nucleating agent, a lubricant and an antioxidant are uniformly mixed, heated, melted and mixed, glass fiber is added during melting and mixing, and then the mixture is extruded by a double-screw extruder, cooled and granulated to obtain the bio-based polyamide 56 material for the heat insulation strip.
The invention also provides a preparation method of any one of the heat insulation strips, which comprises the following steps:
1) mixing the polyamide 56, a nucleating agent, a lubricant and an antioxidant to obtain a premix;
2) adding the premix into a double-screw extruder, carrying out melt mixing on the premix, simultaneously feeding the glass fiber into the premix, then extruding through the double-screw extruder, cooling, and carrying out grain cutting to obtain the bio-based polyamide 56 material for the heat insulation strip.
In step 1), the proportions of the respective raw materials are the same as the above proportions. After the materials are prepared according to the defined proportion, the polyamide 56, the nucleating agent, the lubricant and the antioxidant can be uniformly mixed at normal temperature to obtain the premix.
And 2) melting and mixing the premix in a double-screw extruder, forcibly feeding glass fibers into the heated premix from a side feeding port while melting and mixing, timing after the addition of the glass fibers is finished, and extruding, cooling and granulating the mixture for 5-10min by using the double-screw extruder to obtain the bio-based polyamide 56 material for the heat insulation strip. Preferably, the temperature at which the twin-screw extruder melt-mixes the premix is 210 ℃ and 290 ℃.
In a specific operation, a molten strand is extruded from the nozzle of the twin-screw extruder. And cooling the molten strand by adopting a water cooling mode to obtain a solid strand, and then granulating the solid strand to obtain the bio-based polyamide 56 material for the heat insulation strip.
Specifically, in the melting and mixing step 2), the twin-screw extruder is a seven-zone heating mode, the temperature of the first zone is 210-; wherein the direction from the first area to the seventh area is the direction from the feeding port to the die port.
And/or the temperature of the die orifice of the double-screw extruder is 260-275 ℃;
and/or the screw rotating speed of the double-screw extruder is 350-500 r/min;
and/or the main feeding speed of the double-screw extruder is 10-40r/min, and the side feeding speed of the double-screw extruder is 2-10r/min, wherein the main feeding speed refers to the speed of feeding the premix into the double-screw extruder, and the side feeding speed refers to the speed of feeding the glass fiber into the double-screw extruder;
and/or the length-diameter ratio of the double-screw extruder is 1: (30-50), preferably 1: 40.
the invention also provides a heat insulation strip, which at least comprises the bio-based polyamide 56 material for the heat insulation strip.
The invention has the beneficial effects that:
1. the bio-based polyamide 56 material for the heat insulation strip takes PA56 as a main raw material, so that the environment-friendly degree is improved, and the mechanical strength of the heat insulation strip can be enhanced;
2. the bio-based polyamide 56 material for the heat insulation strip disclosed by the invention takes PA56 as a main raw material, is assisted by a nucleating agent, glass fiber, a lubricant and an antioxidant, is high in crystallization rate in the processing process, is easy to demould in extrusion forming, and is short in time consumption in extrusion forming. The bio-based polyamide 56 material and the heat insulation strip prepared from the same have high mechanical strength. The prepared heat insulation strip has good dimensional stability due to more sufficient crystallization;
3. the preparation method of the bio-based polyamide 56 material for the heat insulation strip is simple, the process parameters are easy to control, large instruments are not needed for assistance, and the quantitative production is convenient to carry out.
Detailed Description
In order to make the objects, technical solutions and advantages 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 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.
Some of the starting materials for the following examples and comparative examples are now described below, the source of which is not intended to be a limitation of the starting materials used in the present invention:
PA 56: kaiser (jinxiang) biomaterial limited;
nucleating agent P22: bruggeman (bruggelen) brand, germany;
montan wax: model Licowax-e, Craine chemical;
amide wax: model Licowax-c, Craine chemical.
Glass fiber: length 4mm, diameter 50 um-150 um, Owens Corning Reinforcements.
Glass fiber: 4.5mm in length and 50-150 um in diameter, and is available from Jushi group Co.
Glass fiber: 3mm in length and 50-150 um in diameter, Taishan glass fiber Co.
Example 1
The bio-based polyamide 56 material for the heat insulation strip comprises the following raw materials in parts by weight:
polyamide PA56 (viscosity number: 2.83): 74.4 parts
Nucleating agent P22: 0.1 part
Glass fiber (length: 4.0 mmm): 25 portions of
Montan wax: 0.15 part
Amide wax: 0.15 part
Antioxidant 168: 0.2 part
The preparation method of the bio-based polyamide 56 material for the heat insulation strip comprises the following steps:
1) preparing materials according to the proportion;
2) mixing PA56, nucleating agent P22, montan wax, amide wax and antioxidant 168 to obtain a premix;
3) the pre-mixture was melt-kneaded by a twin-screw extruder, and at the same time, glass fibers were forcibly fed into the pre-mixture from a side feed port, and after 5 to 10 minutes, a molten strand was obtained by extrusion through the twin-screw extruder, and the strand was cooled to a temperature below the melting point of PA56 with water as a cooling medium and pelletized, thereby obtaining the bio-based polyamide 56 material for a heat insulating strip of the present example.
Wherein the double-screw extruder adopts a seven-zone heating mode, and the temperatures of the first zone to the seventh zone (feeding to a die orifice) are 255 ℃, 265 ℃, 255 ℃, 280 ℃, 260 ℃, 265 ℃ and 260 ℃ in sequence;
the temperature of the die orifice is 265 ℃;
the main feeding speed is 18r/min, and the side feeding speed is 4.5 r/min;
the rotating speed of the screw is 480 r/min;
the length-diameter ratio of the double-screw extruder is 1: 40. The following tests were performed on the bio-based polyamide 56 material for the insulation strips of this example, and the test results are shown in table 1.
1. The crystallization peak temperature and half peak width (width corresponding to half of the crystallization peak height) of the bio-based polyamide 56 material for a heat insulating strip of the present example prepared as described above were measured by a differential scanning calorimeter (TA, Q2000), wherein the non-isothermal crystallization conditions were: firstly, the temperature is increased from room temperature to 300 ℃ at the speed of 10 ℃/min, the temperature is reduced to the room temperature at the speed of 10 ℃/min after the temperature is kept for 2min, and then the temperature is increased from the room temperature to 300 ℃ at the speed of 10 ℃/min. The crystallization peak temperatures and half-peak widths are shown in Table 1.
2. The bio-based polyamide 56 material for the thermal insulation strip prepared in the above-mentioned embodiment is subjected to mechanical property tests including tensile strength, bending property and impact property tests, bending strength and impact strength tests, wherein the dumbbell test piece size of the tensile strength is 170 × 10 × 4mm (ISO527), the test piece size of the bending strength is 80 × 10 × 4mm (ISO178), and the test piece notch of the impact strength is 2mm impact (ISO 197). The test results are shown in Table 1.
3. The heat insulating strips were injection molded with a bio-based polyamide 56 material and subjected to an injection molding shrinkage test (ISO 294.4). The specific test results are shown in table 1.
Example 2
The bio-based polyamide 56 material for the heat insulation strip comprises the following raw materials in parts by weight:
polyamide PA56 (viscosity number: 2.87): 74.2 parts
Nucleating agent P22: 0.05 part
Montmorillonite: 0.15 part
Glass fiber (length: 4.5 mmm): 25 portions of
Calcium stearate: 0.2 part
EBS: 0.2 part
Antioxidant 1098: 0.2 part
The preparation method of the bio-based polyamide 56 material for the heat insulation strip comprises the following steps:
1) preparing materials according to the proportion;
2) mixing PA56, a nucleating agent P22, montmorillonite, calcium stearate, EBS and an antioxidant 1098 to obtain a premix;
3) the pre-mixture was melt-kneaded by a twin-screw extruder, and at the same time, glass fibers were forcibly fed into the pre-mixture from a side feed port for 5 to 10min, and a strand was extruded by the twin-screw extruder, cooled to a temperature below the melting point of PA56 with water as a cooling medium, and cut to obtain the bio-based polyamide 56 material for a heat insulating strip of the present example.
Wherein the twin-screw extruder adopts seven-zone heating mode, and the temperatures of the first zone to the seventh zone (from the feeding to the die orifice) are 250 ℃, 260 ℃, 265 ℃, 260 ℃ and 265 DEG C
The temperature of the die orifice is 260 ℃;
the main feeding speed is 18r/min, and the side feeding speed is 4.5 r/min;
the rotating speed of the screw is 480 r/min;
the length-diameter ratio of the double-screw extruder is 1: 40.
The same tests as those conducted for the bio-based polyamide 56 material for the thermal insulating tape in example 1 were conducted for the bio-based polyamide 56 material for the thermal insulating tape of this example, and the test results are shown in table 1.
Example 3
The bio-based polyamide 56 material for the heat insulation strip comprises the following raw materials in parts by weight:
polyamide PA56 (viscosity number: 2.90): 73.95 parts
Nucleating agent P22: 0.05 part
Montmorillonite: 0.15 part
Talc powder: 0.15 part
Glass fiber (length: 3.0 mmm): 25 portions of
Calcium stearate: 0.05 part
EBS: 0.2 part
Amide wax: 0.25 part
Antioxidant 1098: 0.2 part
The preparation method of the bio-based polyamide 56 material for the heat insulation strip comprises the following steps:
1) preparing materials according to the proportion;
2) mixing PA56, nucleating agent P22, montmorillonite, talcum powder, calcium stearate, EBS, amide wax and antioxidant 1098 to obtain a premix;
3) the pre-mixture was melt-kneaded by a twin-screw extruder, and at the same time, glass fibers were forcibly fed into the pre-mixture from a side feed port, and after 5 to 10 minutes, strands were extruded by the twin-screw extruder, and the strands were cooled to a temperature below the melting point of PA56 with water as a cooling medium and cut to obtain the bio-based polyamide 56 material for a heat insulating strip of the present example.
Wherein the double-screw extruder adopts a seven-zone heating mode, and the temperatures of the first zone to the seventh zone (feeding to a die orifice) are 255 ℃, 260 ℃, 265 ℃, 260 ℃, 265 ℃ and 255 ℃ in sequence;
the temperature of the die orifice is 265 ℃;
the main feeding speed is 18r/min, and the side feeding speed is 4.5 r/min;
the rotating speed of the screw is 480 r/min;
the length-diameter ratio of the double-screw extruder is 1: 40.
The same tests as those conducted for the bio-based polyamide 56 material for the thermal insulating tape in example 1 were conducted for the bio-based polyamide 56 material for the thermal insulating tape of this example, and the test results are shown in table 1.
Example 4
The bio-based polyamide 56 material for the heat insulation strip comprises the following raw materials in parts by weight:
polyamide PA56 (viscosity number: 2.96): 74.05 parts
Nucleating agent P22: 0.05 part
Montmorillonite: 0.10 portion
Talc powder: 0.10 portion
Glass fiber (length: 4.0 mmm): 25 portions of
Calcium stearate: 0.2 part
EBS: 0.2 part
Antioxidant 1098: 0.1 part
Antioxidant S9228: 0.2 part
The preparation method of the bio-based polyamide 56 material for the heat insulation strip comprises the following steps:
1) preparing materials according to the proportion;
2) mixing PA56, nucleating agent P22, montmorillonite, talcum powder, calcium stearate, EBS, antioxidant 1098 and antioxidant S9228 to obtain a premix;
3) the pre-mixture was melt-kneaded by a twin-screw extruder, and at the same time, glass fibers were forcibly fed into the pre-mixture from a side feed port, and after 5 to 10 minutes, strands were extruded by the twin-screw extruder, and the strands were cooled to a temperature below the melting point of PA56 with water as a cooling medium and cut to obtain the bio-based polyamide 56 material for a heat insulating strip of the present example.
Wherein the double-screw extruder adopts a seven-zone heating mode, and the temperatures of the first zone to the seventh zone (feeding to a die orifice) are 255 ℃, 260 ℃, 265 ℃, 260 ℃, 265 ℃ and 265 ℃ in sequence;
the temperature of the die orifice is 270 ℃;
the main feeding speed is 18r/min, and the side feeding speed is 4.5 r/min;
the rotating speed of the screw is 480 r/min;
the length-diameter ratio of the double-screw extruder is 1: 40.
The same tests as those conducted for the bio-based polyamide 56 material for the thermal insulating tape in example 1 were conducted for the bio-based polyamide 56 material for the thermal insulating tape of this example, and the test results are shown in table 1.
Example 5
The bio-based polyamide 56 material for the heat insulation strip comprises the following raw materials in parts by weight:
polyamide PA56 (viscosity number: 2.88): 74.2 parts
Nucleating agent P22: 0.10 portion
Montmorillonite: 0.15 part
Talc powder: 0.10 portion
Glass fiber (length: 4.0 mmm): 25 portions of
Calcium stearate: 0.05 part
EBS: 0.2 part
Amide wax: 0.1 part
Antioxidant 1098: 0.1 part
The preparation method of the bio-based polyamide 56 material for the heat insulation strip comprises the following steps:
1) preparing materials according to the proportion;
2) mixing PA56, nucleating agent P22, montmorillonite, talcum powder, calcium stearate, EBS, amide wax and antioxidant 1098 to obtain a premix;
3) the pre-mixture was melt-kneaded by a twin-screw extruder, and at the same time, glass fibers were forcibly fed into the pre-mixture from a side feed port, and after 5 to 10 minutes, strands were extruded by the twin-screw extruder, and the strands were cooled to a temperature below the melting point of PA56 with water as a cooling medium and cut to obtain the bio-based polyamide 56 material for a heat insulating strip of the present example.
Wherein the double-screw extruder adopts a seven-zone heating mode, and the temperatures of the first zone to the seventh zone (feeding to a die orifice) are 255 ℃, 260 ℃, 265 ℃, 260 ℃, 265 ℃ and 260 ℃ in sequence;
the temperature of the die orifice is 260 ℃;
the main feeding speed is 18r/min, and the side feeding speed is 4.5 r/min;
the rotating speed of the screw is 480 r/min;
the length-diameter ratio of the double-screw extruder is 1: 40.
The same tests as those conducted for the bio-based polyamide 56 material for the thermal insulating tape in example 1 were conducted for the bio-based polyamide 56 material for the thermal insulating tape of this example, and the test results are shown in table 1.
Example 6
The bio-based polyamide 56 material for the heat insulation strip comprises the following raw materials in parts by weight:
polyamide PA56 (viscosity number: 3.1): 74 portions
Nucleating agent P22: 0.10 portion
Montmorillonite: 0.15 part
Talc powder: 0.15 part
Glass fiber (length: 4.0 mmm): 25 portions of
EBS: 0.2 part
Amide wax: 0.1 part
Montan wax: 0.2 part
Antioxidant 168: 0.1 part
The preparation method of the bio-based polyamide 56 material for the heat insulation strip comprises the following steps:
1) preparing materials according to the proportion;
2) mixing PA56, nucleating agent P22, montmorillonite, talcum powder, EBS, amide wax, montan wax and antioxidant 168 to obtain a premix;
3) the pre-mixture was melt-kneaded by a twin-screw extruder, and at the same time, glass fibers were forcibly fed into the pre-mixture from a side feed port, and after 5 to 10 minutes, strands were extruded by the twin-screw extruder, and the strands were cooled to a temperature below the melting point of PA56 with water as a cooling medium and cut to obtain the bio-based polyamide 56 material for a heat insulating strip of the present example.
Wherein the double-screw extruder adopts a seven-zone heating mode, and the temperatures of the first zone to the seventh zone (feeding to a die orifice) are 255 ℃, 260 ℃, 265 ℃, 260 ℃, 265 ℃ and 260 ℃ in sequence:
the temperature of the die orifice is 265 ℃;
the main feeding speed is 18r/min, and the side feeding speed is 4.5 r/min;
the rotating speed of the screw is 480 r/min;
the length-diameter ratio of the double-screw extruder is 1: 40.
The same tests as those conducted for the bio-based polyamide 56 material for the thermal insulating tape in example 1 were conducted for the bio-based polyamide 56 material for the thermal insulating tape of this example, and the test results are shown in table 1.
Example 7
The bio-based polyamide 56 material for the heat insulation strip comprises the following raw materials in parts by weight:
polyamide PA56 (viscosity number: 2.95): 74 portions
Nucleating agent P22: 0.10 portion
Montmorillonite: 0.15 part
Talc powder: 0.15 part
Glass fiber (length: 4.0 mmm): 25 portions of
EBS: 0.2 part
Amide wax: 0.1 part
Montan wax: 0.2 part
Antioxidant 168: 0.1 part
The preparation method of the bio-based polyamide 56 material for the heat insulation strip comprises the following steps:
1) preparing materials according to the proportion;
2) mixing PA56, nucleating agent P22, montmorillonite, talcum powder, EBS, amide wax, montan wax and antioxidant 168 to obtain a premix;
3) the pre-mixture was melt-kneaded by a twin-screw extruder, and at the same time, glass fibers were forcibly fed into the pre-mixture from a side feed port, and after 5 to 10 minutes, strands were extruded by the twin-screw extruder, and the strands were cooled to a temperature below the melting point of PA56 with water as a cooling medium and cut to obtain the bio-based polyamide 56 material for a heat insulating strip of the present example.
Wherein the double-screw extruder adopts a seven-zone heating mode, and the temperatures of the first zone to the seventh zone (feeding to a die orifice) are 255 ℃, 260 ℃, 265 ℃, 260 ℃, 265 ℃ and 260 ℃ in sequence; the temperature of the die orifice is 265 ℃;
the main feeding speed is 18r/min, and the side feeding speed is 4.5 r/min;
the rotating speed of the screw is 480 r/min;
the length-diameter ratio of the double-screw extruder is 1: 40.
The same tests as those conducted for the bio-based polyamide 56 material for the thermal insulating tape in example 1 were conducted for the bio-based polyamide 56 material for the thermal insulating tape of this example, and the test results are shown in table 1.
Comparative example 1
The bio-based polyamide 56 material for the heat insulation strip of the comparative example comprises the following raw materials in parts by weight:
polyamide PA56 (viscosity number: 2.90): 99.3 parts of
Amide wax: 0.25 part
Calcium stearate: 0.05 part
EBS: 0.2 part
Antioxidant 1098: 0.2 part
The preparation method of the bio-based polyamide 56 material for the thermal insulation strip of the comparative example comprises the following steps:
1) preparing materials according to the proportion;
2) mixing PA56, amide wax, calcium stearate, EBS and antioxidant 1098 to obtain a premix;
3) the premix was melt-kneaded by a twin-screw extruder, and then strands were extruded by the twin-screw extruder, and the strands were cooled to a temperature below the melting point of PA56 with water as a cooling medium and cut to obtain a bio-based polyamide 56 material for a heat insulating strip of this comparative example.
Wherein the double-screw extruder adopts a seven-zone heating mode, and the temperatures of the first zone to the seventh zone (feeding to a die orifice) are 250 ℃, 260 ℃, 280 ℃, 270 ℃ and 270 ℃ in sequence;
the temperature of the die orifice is 260 ℃;
the main feeding speed is 18 r/min;
the rotating speed of the screw is 480 r/min;
the length-diameter ratio of the double-screw extruder is 1: 40.
The same test as that of the bio-based polyamide 56 material for the thermal insulating tape of example 1 was performed on the bio-based polyamide 56 material for the thermal insulating tape of this comparative example, and the test results are shown in table 1.
Comparative example 2
The bio-based polyamide 56 material for the heat insulation strip of the comparative example comprises the following raw materials in parts by weight:
polyamide PA56 (viscosity number: 2.90): 74.3 parts
25 parts of glass fiber (length: 3.0mm)
Amide wax: 0.25 part
Calcium stearate: 0.05 part
EBS: 0.2 part
Antioxidant 1098: 0.2 part
The preparation method of the bio-based polyamide 56 material for the thermal insulation strip of the comparative example comprises the following steps:
1) preparing materials according to the proportion;
2) mixing PA56, amide wax, calcium stearate, EBS and antioxidant 1098 to obtain a premix;
3) the pre-mixture was melt-kneaded by a twin-screw extruder, and at the same time, glass fibers were forcibly fed into the pre-mixture from a side feed port, and after 5 to 10 minutes, strands were extruded by the twin-screw extruder, and the strands were cooled to a temperature below the melting point of PA56 with water as a cooling medium and cut to obtain the bio-based polyamide 56 material for a heat insulating strip of the present example.
Wherein the double-screw extruder adopts a seven-zone heating mode, and the temperatures of the first zone to the seventh zone (feeding to a die orifice) are 250 ℃, 260 ℃, 280 ℃, 270 ℃ and 265 ℃ in sequence;
the temperature of the die orifice is 260 ℃;
the main feeding speed is 18r/min, and the side feeding speed is 4.5 r/min;
the rotating speed of the screw is 480 r/min;
the length-diameter ratio of the double-screw extruder is 1: 40.
The same test as that of the bio-based polyamide 56 material for the thermal insulating tape of example 1 was performed on the bio-based polyamide 56 material for the thermal insulating tape of this comparative example, and the test results are shown in table 1.
Comparative example 3
The bio-based polyamide 56 material for the heat insulation strip of the comparative example comprises the following raw materials in parts by weight:
polyamide PA56 (viscosity number: 2.90): 98.95 parts
Nucleating agent P22: 0.05 part
Montmorillonite: 0.15 part
Talc powder: 0.15 part
Amide wax: 0.25 part
Calcium stearate: 0.05 part
EBS: 0.2 part
Antioxidant 1098: 0.2 part
The preparation method of the bio-based polyamide 56 material for the thermal insulation strip of the comparative example comprises the following steps:
1) preparing materials according to the proportion;
2) mixing PA56, a nucleating agent P22, montmorillonite, talcum powder, amide wax, calcium stearate, EBS and an antioxidant 1098 to obtain a premix;
3) the premix was melt-kneaded by a twin-screw extruder, and then strands were extruded by the twin-screw extruder, and the strands were cooled to a temperature below the melting point of PA56 with water as a cooling medium and cut to obtain the bio-based polyamide 56 material for a heat insulating strip of the present example.
Wherein the twin-screw extruder adopts seven-zone heating mode, and the temperatures of the first zone to the seventh zone (from the feeding to the die orifice) are 250 ℃, 260 ℃, 280 ℃, 270 ℃ and 270 DEG C
The temperature of the die orifice is 260 ℃;
the main feeding speed is 18 r/min;
the rotating speed of the screw is 480 r/min;
the length-diameter ratio of the double-screw extruder is 1: 40.
The same test as that of the bio-based polyamide 56 material for the thermal insulating tape of example 1 was performed on the bio-based polyamide 56 material for the thermal insulating tape of this comparative example, and the test results are shown in table 1.
Comparative example 4
The bio-based polyamide 56 material for the heat insulation strip of the comparative example comprises the following raw materials in parts by weight:
polyamide PA56 (viscosity number: 2.80): 99.25 parts
Nucleating agent P22: 0.05 part
Amide wax: 0.25 part
Calcium stearate: 0.05 part
EBS: 0.2 part
Antioxidant 1098: 0.2 part
The preparation method of the bio-based polyamide 56 material for the thermal insulation strip of the comparative example comprises the following steps:
1) preparing materials according to the proportion;
2) mixing PA56, nucleating agent P22, amide wax, calcium stearate, EBS and antioxidant 1098 to obtain a premix;
3) the premix was melt-kneaded by a twin-screw extruder, and then strands were extruded by the twin-screw extruder, and the strands were cooled to a temperature below the melting point of PA56 with water as a cooling medium and cut to obtain the bio-based polyamide 56 material for a heat insulating strip of the present example.
Wherein the twin-screw extruder adopts seven-zone heating mode, and the temperatures of the first zone to the seventh zone (from the feeding to the die orifice) are 250 ℃, 260 ℃, 280 ℃, 270 ℃ and 270 DEG C
The temperature of the die orifice is 260 ℃;
the main feeding speed is 18 r/min;
the rotating speed of the screw is 480 r/min;
the length-diameter ratio of the double-screw extruder is 1: 40.
The same test as that of the bio-based polyamide 56 material for the thermal insulating tape of example 1 was performed on the bio-based polyamide 56 material for the thermal insulating tape of this comparative example, and the test results are shown in table 1.
Comparative example 5
The bio-based polyamide 56 material for the heat insulation strip of the comparative example comprises the following raw materials in parts by weight:
polyamide PA56 (viscosity number: 2.86): 99.15 parts of
Montmorillonite: 0.15 part
Amide wax: 0.25 part
Calcium stearate: 0.05 part
EBS: 0.2 part
Antioxidant 1098: 0.2 part
The preparation method of the bio-based polyamide 56 material for the thermal insulation strip of the comparative example comprises the following steps:
1) preparing materials according to the proportion;
2) mixing PA56, montmorillonite, amide wax, calcium stearate, EBS and antioxidant 1098 to obtain a premix;
3) the premix was melt-kneaded by a twin-screw extruder, and then strands were extruded by the twin-screw extruder, and the strands were cooled to a temperature below the melting point of PA56 with water as a cooling medium and cut to obtain the bio-based polyamide 56 material for a heat insulating strip of the present example.
Wherein the twin-screw extruder adopts seven-zone heating mode, and the temperatures of the first zone to the seventh zone (from the feeding to the die orifice) are 250 ℃, 260 ℃, 280 ℃, 270 ℃ and 270 DEG C
The temperature of the die orifice is 260 ℃;
the main feeding speed is 18 r/min;
the rotating speed of the screw is 480 r/min;
the length-diameter ratio of the double-screw extruder is 1: 40.
The same test as that of the bio-based polyamide 56 material for the thermal insulating tape of example 1 was performed on the bio-based polyamide 56 material for the thermal insulating tape of this comparative example, and the test results are shown in table 1.
Comparative example 6
The bio-based polyamide 56 material for the heat insulation strip of the comparative example comprises the following raw materials in parts by weight:
polyamide PA56 (viscosity number: 2.80): 99.15 parts of
Talc powder: 0.15 part
Amide wax: 0.25 part
Calcium stearate: 0.05 part
EBS: 0.2 part
Antioxidant 1098: 0.2 part
The preparation method of the bio-based polyamide 56 material for the thermal insulation strip of the comparative example comprises the following steps:
1) preparing materials according to the proportion;
2) mixing PA56, talc, amide wax, calcium stearate, EBS and antioxidant 1098 to obtain a premix;
3) the premix was melt-kneaded by a twin-screw extruder, and then strands were extruded by the twin-screw extruder, and the strands were cooled to a temperature below the melting point of PA56 with water as a cooling medium and cut to obtain the bio-based polyamide 56 material for a heat insulating strip of the present example.
Wherein the twin-screw extruder adopts seven-zone heating mode, and the temperatures of the first zone to the seventh zone (from the feeding to the die orifice) are 250 ℃, 260 ℃, 280 ℃, 270 ℃ and 270 DEG C
The temperature of the die orifice is 260 ℃;
the main feeding speed is 18 r/min;
the rotating speed of the screw is 480 r/min;
the length-diameter ratio of the double-screw extruder is 1: 40.
The same test as that of the bio-based polyamide 56 material for the thermal insulating tape of example 1 was performed on the bio-based polyamide 56 material for the thermal insulating tape of this comparative example, and the test results are shown in table 1.
TABLE 1 test results table
As can be seen from Table 1:
1. the crystallization peak temperature of the bio-based polyamide 56 material for the thermal insulation strip of examples 1 to 7 is higher than that of the bio-based polyamide 56 material for the thermal insulation strip of comparative example 2, and the half-peak width of the bio-based polyamide 56 material for the thermal insulation strip of examples 1 to 7 is smaller than that of the bio-based polyamide 56 material for the thermal insulation strip of comparative example 2, and since the higher the crystallization peak temperature is, the smaller the semi-crystalline peak width is, the faster the crystallization rate is, it is proved that the crystallization rate in the preparation process of the bio-based polyamide 56 material for the thermal insulation strip is increased by adding the nucleating agent, so that the extrusion molding cycle of the bio-based polyamide 56 material for the thermal insulation strip can be shortened, the extrusion molding is easy, and meanwhile, the molding shrinkage rate according to the examples and comparative examples also proves that sufficient crystallization contributes to the improvement of the dimensional stability of the thermal insulation strip product;
in addition, the crystallization peak temperature of the bio-based polyamide 56 material for the thermal insulation bar of comparative examples 3 to 6 is higher than that of the bio-based polyamide 56 material for the thermal insulation bar of comparative example 1, and the half-peak width of the bio-based polyamide 56 material for the thermal insulation bar of comparative examples 3 to 6 is smaller than that of the bio-based polyamide 56 material for the thermal insulation bar of comparative example 1, further demonstrating that the present invention can improve the crystallization rate and shorten the extrusion molding cycle of the bio-based polyamide 56 material for the thermal insulation bar by adding the nucleating agent, making it easy to be pultruded. The dimensional stability of the heat insulation strip product is improved;
2. the mechanical strength (tensile strength, bending strength and impact strength) and crystallization rate of the bio-based polyamide 56 material for insulation strips of examples 1 to 7 are superior to those of the bio-based polyamide 56 material for insulation strips of comparative examples 3 to 6, and it is demonstrated that the present invention facilitates the improvement of the mechanical strength of the insulation strip product by adding glass fiber while providing the insulation strip product with good dimensional stability. The addition of glass fibers to the polyamide matrix also contributes to some extent to the crystallization of the polyamide 56.
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. The bio-based polyamide 56 material for the heat insulation strip is characterized by comprising the following raw materials in parts by weight per 100 parts by weight: 0.05-1 part of nucleating agent, 10-40 parts of glass fiber, 0.05-1 part of lubricant, 0.05-1 part of antioxidant and the balance of polyamide 56.
2. The bio-based polyamide 56 material for the heat insulating strip according to claim 1, wherein per 100 parts by weight of the raw materials comprises: 0.05-0.5 part of nucleating agent, 15-30 parts of glass fiber, 0.05-0.5 part of lubricant, 0.05-0.5 part of antioxidant and the balance of polyamide 56.
3. The bio-based polyamide 56 material for the heat insulating strip according to claim 2, wherein per 100 parts by weight of the raw materials comprises: 0.05-0.5 part of nucleating agent, 25 parts of glass fiber, 0.05-0.5 part of lubricant, 0.05-0.5 part of antioxidant and the balance of polyamide 56.
4. The bio-based polyamide 56 material for thermal insulating strips as claimed in any one of claims 1 to 3, wherein the viscosity number of the polyamide 56 is 2.0 to 4.0.
5. The bio-based polyamide 56 material for the thermal insulating strips of any one of claims 1 to 3, wherein the nucleating agent is selected from one or more of nucleating agent P22, montmorillonite and talc.
6. The bio-based polyamide 56 material for the thermal insulation strip of any one of claims 1 to 3, wherein the nucleating agent is a mixture of the nucleating agent P22, montmorillonite and talcum powder, and the mass ratio of the nucleating agent P22 to the montmorillonite to the talcum powder is (1-10): (1-10): (1-10), preferably (1-6): (1-6): (1-6), more preferably (1-3): (1-3): (1-3).
7. The bio-based polyamide 56 material for the thermal insulating strips of any one of claims 1 to 3, wherein the lubricant is selected from one or more of montan wax, amide wax, calcium stearate, and ethylene bis-stearamide;
and/or the antioxidant is selected from one or more of antioxidant 168, antioxidant 1098, antioxidant 1010 and antioxidant S9228.
8. The method for preparing the bio-based polyamide 56 material for the thermal insulation strip according to any one of claims 1 to 7, comprising the steps of:
1) mixing the polyamide 56, a nucleating agent, a lubricant and an antioxidant to obtain a premix;
2) adding the premix into a double-screw extruder, carrying out melt mixing on the premix, simultaneously feeding the glass fiber into the premix, then extruding through the double-screw extruder, cooling, and carrying out grain cutting to obtain the bio-based polyamide 56 material for the heat insulation strip.
9. The method for preparing the bio-based polyamide 56 material for the heat insulating strip as claimed in claim 8, wherein the twin screw extruder is a seven-zone heating mode, wherein,
the temperature of one zone is 210-260 ℃,
and/or, the temperature of the second zone is 210-270 ℃,
and/or, the three-zone temperature is 240-,
and/or, the temperature of the four zones is 260 ℃ and 280 ℃,
and/or, the five-zone temperature is 260-,
and/or, the six-zone temperature is 260-,
and/or the temperature of the seven zones is 255-285 ℃;
and/or the temperature of the die orifice of the double-screw extruder is 260-275 ℃;
and/or the screw rotating speed of the double-screw extruder is 350-500 r/min;
and/or the main feeding speed of the double-screw extruder is 10-40r/min, and the side feeding speed is 2-10 r/min;
and/or the length-diameter ratio of the double-screw extruder is 1 (30-50).
10. An insulating strip comprising at least the bio-based polyamide 56 material for an insulating strip according to any one of claims 1 to 7.
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