CN114262513A - Glass fiber reinforced nylon 6 composite material - Google Patents
Glass fiber reinforced nylon 6 composite material Download PDFInfo
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- CN114262513A CN114262513A CN202110995815.8A CN202110995815A CN114262513A CN 114262513 A CN114262513 A CN 114262513A CN 202110995815 A CN202110995815 A CN 202110995815A CN 114262513 A CN114262513 A CN 114262513A
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Images
Abstract
The invention relates to a glass fiber reinforced nylon 6 composite material, which comprises the following components in parts by weight: 40-60 parts of nylon 6 resin, 5-30 parts of high-temperature nylon resin, 23-27 parts of glass fiber, 1-15 parts of toughening agent, 0.1-3 parts of coupling agent, 0.1-3 parts of dispersing lubricant, 0.1-1 part of antioxidant and 0.1-3 parts of color master batch, and by adding the high-temperature nylon resin, the melt strength is low, the extrusion speed is low and the tensile strength is poor during production of a nylon 6 heat insulation strip product.
Description
Technical Field
The invention relates to a glass fiber reinforced composite material, in particular to a glass fiber reinforced nylon 6 composite material.
Background
The polyamide is a polymer containing amido bonds, which is obtained by the condensation polymerization, ring opening and other methods of diamine and dibasic acid. The polymer has special properties of high modulus, high strength, high temperature resistance, high initial property, flame retardance, heat conduction and the like, and is widely applied. Polyamides, also known as nylon 6, are usually prepared by the polycondensation of caprolactam, and the oxygen in the amide group can form a relatively strong oxygen bond with the carboxyl groups in different molecular chains.
In the composite material, substances capable of improving the mechanical property of the matrix material are all reinforced materials. The reinforcing material as a dispersed phase greatly improves the strength and rigidity of the matrix material. In the dispersed phase, the matrix material primarily serves to transfer loads, distribute the loads to the individual fibers, and bond the fibers together to form a unitary body. Therefore, the high specific strength and specific rigidity of the composite material are both from the reinforcing fibers, and the elongation at break of the reinforcing fibers is smaller than that of the matrix resin; the interface bonding performance of the composite material plays an important role and sometimes plays a decisive role in the performance of the overall performance of the composite material, and a commonly used reinforcing material is glass fiber.
The heat insulation strip of the aluminum alloy door and window is used as a key material for connecting the external aluminum alloy frame and the internal aluminum alloy frame, and is required to have excellent mechanical properties, particularly transverse tensile property, high glossiness, good dimensional stability, good heat insulation, good fire resistance and good thermal stability.
At present, the heat-insulating strip plastic for the aluminum alloy bridge-cut-off window in China has glass fiber reinforced composite materials such as nylon 66, PVC, ABS and the like, the nylon 66 has certain advantages in hydrolysis resistance, high temperature resistance and strength, but the nylon 6 resin has low price and low strength compared with the nylon 66 resin. For a long time, on the premise of not influencing the mechanical and processing properties of the reinforced nylon 6 material, the improvement of the strength of the nylon 6 heat insulation strip is a technical problem to be solved in the field.
The invention solves the problems of low melt strength, low extrusion speed and poor tensile strength of nylon 6 heat-insulating strip products during production.
Disclosure of Invention
The invention mainly aims to provide a novel glass fiber reinforced nylon 6 composite material, which can solve the problems of low melt strength, low extrusion speed and poor tensile strength of the conventional nylon 6 heat insulation strip product during production.
The invention is realized by the following steps:
a glass fiber reinforced nylon 6 heat insulation strip material comprises the following components in parts by weight: 40-60 parts of nylon 6 resin, 5-30 parts of high-temperature nylon resin, 23-27 parts of glass fiber, 1-15 parts of toughening agent and 0.1-3 parts of coupling agent.
Preferably, the glass fiber reinforced nylon 6 heat insulation strip material further comprises 0.1-3 parts of a dispersing lubricant, 0.1-1 part of an antioxidant and 0.1-3 parts of a color master batch.
Preferably, the nylon 6 resin is a new nylon 6 resin raw material and/or a regenerated raw material in an amount of 40-50 parts by weight, the intrinsic viscosity of the new nylon 6 resin raw material is 2.0-3.6dl/g, more preferably 2.0-2.8dl/g, the high-temperature nylon resin is 10-20 parts by weight, the high-temperature nylon resin is a new raw material and/or a regenerated raw material, the high-temperature nylon resin is polyphthalamide (PPA), the glass fiber is 25 parts by weight, the glass fiber is alkali-free chopped glass fiber or alkali-free long glass fiber subjected to surface treatment or a mixture prepared from the alkali-free chopped glass fiber and the alkali-free long glass fiber in a ratio, the diameter of the alkali-free chopped glass fiber is 5-24 um, the length of the alkali-free chopped glass fiber is 3-9 mm, and the diameter of the alkali-free long glass fiber is 7-20 um.
Preferably, a nylon 6 return material is further added into the glass fiber reinforced nylon 6 heat insulation strip material, and the nylon 6 return material is an injection piece, airbag cloth or nylon filament granulating material.
Preferably, the toughening agent is 2-5 parts by weight, the toughening agent is one or a mixture of more of polyolefin elastomer grafted maleic anhydride POE-g-MAH, ethylene propylene rubber or ethylene propylene diene monomer grafted maleic anhydride EPDM-g-MAH, and the polyolefin elastomer comprises a polyethylene octene elastomer, a polyethylene butene elastomer and a polyethylene hexene elastomer.
Preferably, the coupling agent is one or a mixture of more of a silane coupling agent KH560, a silane coupling agent KH550 and a silane coupling agent KH570, the coupling agent is 0.2-0.5 part by weight, and the silane coupling agent KH560 or the silane coupling agent KH550 is preferably selected as the coupling agent.
Preferably, the dispersing lubricant is 0.3-0.5 part by weight, the dispersing lubricant is mineral oil, erucamide, calcium stearate, zinc stearate or silicone master batch, preferably silicone master batch, the antioxidant is 0.1-0.3 part by weight, the antioxidant is one or a mixture of antioxidant 1010, antioxidant 168 and antioxidant 1098, the color master batch is 0.5-1.0 part by weight, and the color master batch is black master batch.
A preparation method of a glass fiber reinforced nylon 6 heat insulation strip material comprises the following steps:
the method comprises the following steps: weighing nylon 6 resin, high-temperature nylon resin, a toughening agent, a silane coupling agent, an antioxidant, a dispersing lubricant and color master batches according to the proportion, drying the nylon 6 and the high-temperature nylon resin at 100-140 ℃ for 3-6 h, and then uniformly mixing the rest components, the dried nylon 6 and the dried high-temperature nylon in a high-speed mixer to form a premix;
step two: adding the premix prepared in the step one from a main feeding port of a double-screw extruder with a screw diameter of 60 or 65 and a length-diameter ratio of 48, adding glass fiber from a side feeding port, performing melt extrusion, granulating, controlling the extrusion temperature at 240 ℃ to obtain glass fiber reinforced nylon 6 composite material granules special for the heat insulation strip, and preparing the obtained nylon 6 composite material granules into a finished glass fiber reinforced nylon 6 heat insulation strip material product through layering and stretching.
The scheme for solving the technical problems of low melt strength, low extrusion speed and poor tensile strength is as follows:
in the production of the glass fiber reinforced nylon 6, the type and content of the glass fiber, the dispersion degree of the glass fiber in the resin matrix and the extrusion process have decisive influence on the melt strength, the stretching speed and the extrusion speed, so that:
the glass fiber selects the alkali-free chopped glass fiber or the alkali-free long glass fiber which is subjected to surface treatment, the surface treatment mainly reduces the contact angle of the surface of the glass fiber, and the glass fiber is preformed, so that the glass fiber is better dispersed in a resin phase, on the premise of ensuring that the glass fiber and the resin have good compatibility, the content of the glass fiber is adjusted, and the thickness of a nylon 6 resin layer between the glass fibers is controlled.
The extrusion process parameters mainly affect the mechanical properties of the composite material by changing the final retention length and distribution state of the glass fibers and the nylon 6 matrix, and the compatibility of the glass fibers and resin is greatly improved in the aspect of raw material proportion, so that the shearing action of the extruder is weak, the final retention length of the glass fibers is larger, the proper feeding speed is ensured, the length of the glass fibers is ensured, the mutual entanglement degree of the glass fibers can be improved, and the melt strength, the stretching speed and the extrusion speed can be obviously improved.
Drawings
FIG. 1 is an electron micrograph of a melt according to an embodiment of the present invention;
FIG. 2 is a diagram of a typical glass fiber morphology after the addition of glass fibers in examples one to eight of the present invention;
FIG. 3 is a graph showing the morphology of a typical glass fiber after the addition of glass fibers according to comparative examples one to two of the present invention.
Detailed Description
To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the glass fiber reinforced nylon 6 composite material according to the present invention, its specific implementation, structure, features and effects will be provided in conjunction with the accompanying drawings and preferred embodiments. In the following description, different "one embodiment" or "an embodiment" refers to not necessarily the same embodiment. Furthermore, the particular features, structures, or characteristics may be combined in any suitable manner in one or more embodiments.
The embodiment of the invention adopts the following raw materials:
nylon 6: xinhui Meida, model M3400;
high temperature nylon PPA: suwei, USA, model AT-1001L;
glass fiber: the megalite fiberglass company Limited, model number ER 13-2000-988A;
POE-g-MAH: dupont, model number Fusabond N493;
silane coupling agent: united states Union carbon, model number KH-560;
antioxidant: ciba, model IRGANOX 1098;
silicone master batch: american Dow coming MB 25-502;
black masterbatch: U.S. cabot black masterbatch UN 2014.
In the invention, a silane coupling agent KH560 is gamma-glycidoxypropyltrimethylsilane, a silane coupling agent KH550 is gamma-aminopropyltriethoxysilane, and a silane coupling agent KH570 is gamma-methacryloxypropyltrimethoxysilane.
The color master batch preferably uses black master batch, and has better weather resistance.
The first embodiment is as follows:
the preparation process of the glass fiber reinforced nylon 6 composite material comprises the following steps:
the method comprises the following steps: weighing 648 parts of nylon, 20 parts of high-temperature nylon PPA, 5 parts of toughening agent POE-g-MAH, 0.3 part of silane coupling agent, 0.2 part of antioxidant, 0.5 part of dispersed lubricant silicone master batch and 1 part of black master batch according to the parts by weight, firstly drying the nylon 6 and the high-temperature nylon PPA for 4 hours at 120 ℃, and then putting the rest components and the dried nylon 6 and the dried high-temperature nylon PPA into a high-speed mixer to mix for 1-2 minutes to obtain a premix;
step two: and (3) adding the premix prepared in the step one into a main feeding port of a double-screw extruder (the diameter of a screw is 60mm, and the length-diameter ratio L/D is 48), adding the glass fiber from a side feeding port, controlling the revolution and the feeding amount of a main machine to control the content of the glass fiber to be 25%, and performing melt extrusion and granulation to obtain the special glass fiber reinforced nylon 6 composition granules for the heat insulation strip. Wherein the temperature of each screw cylinder of the double-screw extruder is 230-310 ℃.
Step three: and (4) drying the granules prepared in the step (II) for 4 hours, then carrying out melt extrusion by a single-screw extruder at the screw rotating speed of 35rpm and the temperature of each zone of 240-290 ℃, and then carrying out shaping by a die at the traction speed of 15cm/min to prepare the 14.8mm national standard I-type glass fiber reinforced nylon heat insulation strip.
Example two:
the method comprises the following steps of weighing 653 parts of nylon, 15 parts of high-temperature nylon PPA, 5 parts of POE-g-MAH, 0.3 part of silane coupling agent, 0.2 part of antioxidant, 0.5 part of silicone master batch of dispersing lubricant and 1 part of black master batch according to the weight parts, drying nylon 6 and the high-temperature nylon PPA for 4 hours at 120 ℃, then putting the rest of components, the dried nylon 66 and the dried high-temperature nylon PPA into a high-speed mixer to mix for 1-2 minutes to obtain a premix, and producing the raw materials of the heat insulation strip according to the second step in the example 1 and producing the heat insulation strip according to the third step except that the glass fiber content is operated according to the above proportion.
Example three:
weighing 660 parts of nylon, 10 parts of high-temperature nylon PPA, 3 parts of POE-g-MAH, 0.3 part of silane coupling agent, 0.2 part of antioxidant, 0.5 part of silicone master batch of dispersing lubricant and 1 part of black master batch in parts by weight, drying the nylon 6 and the high-temperature nylon PPA for 4 hours at 120 ℃, then putting the rest of the components and the dried nylon 6 and the dried high-temperature nylon PPA into a high-speed mixer to mix for 1-2 minutes to obtain a premix, and except for the operation of the glass fiber content according to the proportion, producing the raw material of the heat insulation strip according to the second step in the example 1 and producing the heat insulation strip according to the third step.
Example four:
weighing 640 parts of nylon, 10 parts of high-temperature nylon PPA, 3 parts of POE-g-MAH, 0.3 part of silane coupling agent, 0.2 part of antioxidant, 0.5 part of silicone master batch of dispersing lubricant and 1 part of black master batch according to the weight parts, drying the nylon 6 and the high-temperature nylon PPA for 4 hours at 120 ℃, then putting the rest components and the dried nylon 6 and the dried high-temperature nylon PPA into a high-speed mixer to mix for 1-2 minutes to obtain a premix, and except for the operation of the glass fiber content according to the proportion, producing the raw material of the heat insulation strip according to the second step in the embodiment 1 and producing the heat insulation strip according to the third step.
Example five:
weighing 640 parts of nylon, 5 parts of high-temperature nylon PPA, 1 part of toughening agent (POE-g-MAH), 0.1 part of silane coupling agent, 0.1 part of antioxidant and 0.1 part of silicone master batch selected as dispersing lubricant and 0.1 part of black master batch, drying nylon 6 and the high-temperature nylon PPA at 120 ℃ for 4 hours, then putting the rest of components, the dried nylon 66 and the dried high-temperature nylon PPA into a high-speed mixer to mix for 1-2 minutes to obtain a premix, and producing the raw materials of the heat insulation strip according to the second step in the example 1 and producing the heat insulation strip according to the third step except that the glass fiber content is operated according to the mixture ratio.
Example six:
weighing 660 parts of nylon, 30 parts of high-temperature nylon PPA, 15 parts of toughening agent (POE-g-MAH), 3 parts of silane coupling agent, 1 part of antioxidant and 3 parts of silicone master batch and black master batch selected as dispersing lubricant, drying nylon 6 and high-temperature nylon PPA for 4 hours at 120 ℃, then putting the rest components and the dried nylon 66 and the dried high-temperature nylon PPA into a high-speed mixer to mix for 1-2 minutes to obtain a premix, and except for the operation of the glass fiber content according to the proportion, producing the raw material of the heat-insulating strip according to the second step in the embodiment 1 and producing the heat-insulating strip according to the third step.
Example seven:
weighing 640 parts of nylon, 10 parts of high-temperature nylon PPA, 2 parts of a toughening agent (POE-g-MAH), 0.2 part of a silane coupling agent, 0.1 part of an antioxidant, 0.3 part of silicone master batch selected as a dispersing lubricant and 0.5 part of black master batch, drying nylon 6 and the high-temperature nylon PPA at 120 ℃ for 4 hours, then putting the rest of components, the dried nylon 66 and the dried high-temperature nylon PPA into a high-speed mixer to mix for 1-2 minutes to obtain a premix, and producing the raw materials of the heat insulation strip in the second step and producing the heat insulation strip in the third step in the embodiment 1 except that the glass fiber content is operated according to the mixture ratio.
Example eight:
weighing 650 parts of nylon, 20 parts of high-temperature nylon PPA, 5 parts of toughening agent (POE-g-MAH), 0.5 part of silane coupling agent, 0.3 part of antioxidant and 0.5 part of silicone master batch selected as dispersing lubricant and 1.0 part of black master batch, drying nylon 6 and the high-temperature nylon PPA for 4 hours at 120 ℃, then putting the rest of the components, the dried nylon 66 and the dried high-temperature nylon PPA into a high-speed mixer for mixing for 1-2 minutes to obtain a premix, and producing the heat insulation strip raw material and producing the heat insulation strip by the steps of the second step and the third step in the example 1 except that the glass fiber content is operated according to the mixture ratio.
Comparative example one:
a preparation method of the heat insulation strip comprises the following steps:
the method comprises the following steps: weighing 665 parts of nylon, 8 parts of POE-g-MAH, 0.3 part of silane coupling agent, 0.2 part of antioxidant, 0.5 part of dispersing lubricant and 1 part of black master batch according to weight percentage, firstly drying nylon 6 at 120 ℃ for 4 hours, and then putting the rest components and the dried nylon 6 into a high-speed mixer to mix for 1-2min to obtain a premix;
step two: and (2) adding the premix prepared in the step one into a main feeding port of a double-screw extruder (the diameter of a screw is 35mm, and the length-diameter ratio L/D is 40), weighing glass fibers, adding the glass fibers from a side feeding port, and granulating after melt extrusion to obtain granules. Wherein the temperature of each screw cylinder of the double-screw extruder (from a charging port to a machine head) is respectively as follows: the rotating speed and the feeding amount of the screw are controlled to be 25 percent at 230-270 ℃.
And (4) drying the granules prepared in the step (II) for 4 hours, then carrying out melt extrusion by a single-screw extruder at the screw rotating speed of 25rpm and the temperature of each zone of 240-270 ℃, and then carrying out shaping by a mould at the traction speed of 10cm/min to prepare the 14.8mm national standard I-type glass fiber reinforced nylon heat insulation strip.
Comparative example two:
a preparation method of the heat insulation strip comprises the following steps:
the method comprises the following steps: weighing 669 parts of nylon, 4 parts of POE-g-MAH, 0.3 part of silane coupling agent, 0.2 part of antioxidant, 0.5 part of dispersing lubricant and 1 part of black master batch according to parts by weight, drying nylon 6 at 120 ℃ for 4 hours, and then putting the rest components and the dried nylon 6 into a high-speed mixer to mix for 1-2min to obtain a premix;
step two: and (2) adding the premix prepared in the step one into a main feeding port of a double-screw extruder (the diameter of a screw is 35mm, and the length-diameter ratio L/D is 40), weighing glass fibers, adding the glass fibers from a side feeding port, and granulating after melt extrusion to obtain granules. Wherein the temperature of each screw cylinder of the double-screw extruder (from a charging port to a machine head) is respectively as follows: the rotating speed and the feeding amount of the screw are controlled to be 25 percent at 230-270 ℃.
And (4) drying the granules prepared in the step (II) for 4 hours, then carrying out melt extrusion by a single-screw extruder at the screw rotating speed of 35rpm and the temperature of each zone of 240-270 ℃, and then carrying out shaping by a mould at the traction speed of 10cm/min to prepare the 14.8mm national standard I-type glass fiber reinforced nylon heat insulation strip.
The injection sample strips of examples 1-8 and comparative examples 1-2 and the extruded I-type heat insulation strips of 14.8mm national standard are dried in a common oven at 140 +/-2 ℃ for 6 hours, taken out, placed in a drier at 23 +/-2 ℃ for cooling for 2 hours, and then tested for performance, wherein the specific test method comprises the following steps:
(1) notched izod impact strength: type a notch, tested according to ISO 180;
(2) bending strength according to ISO178 at a rate of 2 mm/min;
(3) testing the transverse tensile strength of the heat insulating strip at a speed of 10 mm/min;
(4) production rate: length of heat insulating strip production in unit time, unit: cm/min.
The specific test results are shown in the following table:
as can be seen from the comparison of the data of the performance test results of the examples and the comparative examples, the addition of PPA with different proportions can obviously improve the extrusion rate of the material and simultaneously improve the appearance of the material, and the mechanism can be combined with the electron microscope image of the product.
Through the addition of PPA, the melt strength of the material can be effectively increased, and the resistance of the material after passing through a die in the extrusion process is reduced; can effectively improve the stability of the material in the extrusion process, thereby achieving the purpose of reducing appearance defects. Through 3 days of soaking experiments, the size change of the PPA-added heat insulation strip is smaller than that of a comparison sample, so that the PPA-added size is more stable, and the transverse tensile strength of the heat insulation strip is higher than that of the comparison sample.
FIG. 1 is a cross-sectional view of the first embodiment.
Comparing the electron microscope images of products, we find that after nylon 6 and high-temperature nylon PPA are premixed and melted, because nylon 6 and high-temperature nylon PPA cannot be mixed to form a uniform phase state, the components of nylon 6 and high-temperature nylon PPA in different areas have a large difference, but the melt tensile strength of the premixed nylon 6 and high-temperature nylon PPA of different components is inconsistent, experiments find that after the selected coupling agent is added, the outer surfaces of nylon 6 and high-temperature nylon PPA particles are more easily fused, and when the melt is actually stretched, the melt joint has larger tensile strength because the chemical reaction of the coupling agent with the melt of nylon 6 and high-temperature nylon PPA generates chemical bonds, thereby increasing the tensile strength of the melt. As can be seen from the electron microscope image, when the melt is cut, the part with uniform components is easy to break and then shrink, while the part with larger difference between the two components is not easy to break, and the wire can be drawn when the melt is cut.
Since the sizes of the nylon 6 and high-temperature nylon PPA particles in the premix greatly affect the product performance, the mixing time and the rotating speed of the high-speed mixer need to be controlled.
Comparing fig. 2 and fig. 3, we find that the selected toughening agent and coupling agent, after being mixed, also have the effect of softening the glass fiber at the same temperature, but the tensile property of the glass is not obviously changed, but the toughness of the mixture is not obviously changed, and after the surface of the glass fiber is treated by the toughening agent and the coupling agent, the binding force between the glass fiber and the PA is enhanced, and the mechanical property of the product is improved.
The production equipment is a double-screw extrusion granulator set with the screw diameter of 60 or 65 of the length-diameter ratio of 48, and the plasticizing of the product is facilitated due to the fact that the high-temperature nylon is difficult to process and disperse and the screw diameter of 60 or 65 of the length-diameter ratio of 48 is selected.
In the description provided herein, numerous specific details are set forth. It is understood, however, that embodiments of the invention may be practiced without these specific details. In some instances, well-known structures and techniques have not been shown in detail in order not to obscure an understanding of this description.
Similarly, it should be appreciated that in the foregoing description of exemplary embodiments of the invention, various features of the invention are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the various inventive aspects. However, the disclosed apparatus should not be construed to reflect the intent as follows: that the invention as claimed requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive aspects lie in less than all features of a single foregoing disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this invention.
Those skilled in the art will appreciate that the components of the apparatus of the embodiments may be adapted and arranged in one or more arrangements different from the embodiments. The components of the embodiments may be combined into one component and, in addition, they may be divided into a plurality of sub-components. All of the features disclosed in this specification (including any accompanying claims, abstract and drawings), and all of the components of any apparatus so disclosed, may be combined in any combination, except combinations where at least some of such features are mutually exclusive. Each feature disclosed in this specification (including any accompanying claims, abstract and drawings) may be replaced by alternative features serving the same, equivalent or similar purpose, unless expressly stated otherwise.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in any way, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention are still within the scope of the technical solution of the present invention.
Claims (8)
1. The glass fiber reinforced nylon 6 composite material is characterized by comprising the following components in parts by weight: 40-60 parts of nylon 6 resin, 5-30 parts of high-temperature nylon resin, 23-27 parts of glass fiber, 1-15 parts of toughening agent and 0.1-3 parts of coupling agent.
2. The glass fiber reinforced nylon 6 composite material as claimed in claim 1, wherein the glass fiber reinforced nylon 6 thermal insulation strip material further comprises 0.1-3 parts of dispersing lubricant, 0.1-1 part of antioxidant and 0.1-3 parts of color master batch.
3. The glass fiber reinforced nylon 6 composite material as claimed in claim 1, wherein the nylon 6 resin is a new nylon 6 resin raw material and/or a regenerated raw material in an amount of 40-50 parts by weight, the new nylon 6 resin raw material has an intrinsic viscosity of 2.0-3.6dl/g, more preferably a viscosity of 2.0-2.8dl/g, the high temperature nylon resin is 10-20 parts by weight, the high temperature nylon resin is a new raw material and/or a regenerated raw material, the high temperature nylon resin is polyphthalamide PPA, the glass fiber is 25 parts by weight, the glass fiber is surface-treated alkali-free chopped glass fiber or alkali-free long glass fiber or a mixture thereof prepared in proportion, the alkali-free chopped glass fiber has a diameter of 5-24 um, the length is 3-9 mm, and the diameter of the alkali-free long glass fiber is 7-20 um.
4. The glass fiber reinforced nylon 6 composite material as claimed in claim 1 or 2, wherein a nylon 6 return material is further added into the glass fiber reinforced nylon 6 heat insulation strip material, and the nylon 6 return material is an injection piece, an airbag cloth or a nylon filament aggregate.
5. The glass fiber reinforced nylon 6 composite material of claim 1, wherein the toughening agent is 2-5 parts by weight, the toughening agent is one or a mixture of more of polyolefin elastomer grafted maleic anhydride, ethylene propylene diene monomer or ethylene propylene diene monomer grafted maleic anhydride, and the polyolefin elastomer comprises a polyethylene octene elastomer, a polyethylene butene elastomer and a polyethylene hexene elastomer.
6. The glass fiber reinforced nylon 6 composite material as claimed in claim 1, wherein the coupling agent is one or a mixture of silane coupling agent KH560, silane coupling agent KH550 and silane coupling agent KH570, the coupling agent is 0.2-0.5 parts by weight, and the preferred coupling agent is silane coupling agent KH560 or silane coupling agent KH 550.
7. The glass fiber reinforced nylon 6 composite material of claim 1 or 2, wherein the dispersing lubricant is 0.3-0.5 part by weight, the dispersing lubricant is mineral oil, erucamide, calcium stearate, zinc stearate or silicone master batch, preferably silicone master batch, the antioxidant is 0.1-0.3 part by weight, the antioxidant is one or a mixture of several of antioxidant 1010, antioxidant 168 and antioxidant 1098, the master batch is 0.5-1.0 part by weight, and the master batch is black master batch.
8. A preparation method of a glass fiber reinforced nylon 6 heat insulation strip material is characterized by comprising the following steps:
weighing 40-60 parts of nylon 6 resin, 5-30 parts of high-temperature nylon resin, 23-27 parts of glass fiber, 1-15 parts of toughening agent, 0.1-3 parts of coupling agent, 0.1-3 parts of dispersing lubricant, 0.1-1 part of antioxidant and 0.1-3 parts of color master batch according to parts by weight; firstly, drying nylon 6 and high-temperature nylon resin at 100-140 ℃ for 3-6 h, and then uniformly mixing the rest components, the dried nylon 6 and the high-temperature nylon in a high-speed mixer to form a premix;
and step two, adding the premix prepared in the step one from a main feeding port of a double-screw extruder with the screw diameter of 60 or 65 and the length-diameter ratio of 48, adding glass fiber from a side feeding port, performing melt extrusion and granulation, controlling the extrusion temperature at 200-240 ℃ to obtain the special glass fiber reinforced nylon 6 composite material granules for the heat insulation strip, and preparing the obtained nylon 6 composite material granules into a finished glass fiber reinforced nylon 6 heat insulation strip material product through layering and stretching.
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| CN114957982A (en) * | 2022-07-01 | 2022-08-30 | 苏州旭光聚合物有限公司 | Nylon antioxidant master batch, preparation method thereof and application thereof in high-content glass fiber reinforced nylon |
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