CN115819967B - Polyamide composite material and preparation method and application thereof - Google Patents
Polyamide composite material and preparation method and application thereof Download PDFInfo
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- 239000002131 composite material Substances 0.000 title claims abstract description 48
- 239000004952 Polyamide Substances 0.000 title claims abstract description 40
- 229920002647 polyamide Polymers 0.000 title claims abstract description 40
- 238000002360 preparation method Methods 0.000 title abstract description 13
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 53
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 47
- 239000004677 Nylon Substances 0.000 claims abstract description 45
- 229920001778 nylon Polymers 0.000 claims abstract description 45
- 239000003365 glass fiber Substances 0.000 claims abstract description 39
- 239000000463 material Substances 0.000 claims abstract description 32
- 239000000314 lubricant Substances 0.000 claims abstract description 16
- 239000000835 fiber Substances 0.000 claims abstract description 14
- 239000005357 flat glass Substances 0.000 claims abstract description 14
- 239000002667 nucleating agent Substances 0.000 claims abstract description 14
- 239000012752 auxiliary agent Substances 0.000 claims abstract description 13
- 239000003795 chemical substances by application Substances 0.000 claims abstract description 13
- 150000001879 copper Chemical class 0.000 claims abstract description 13
- 238000003466 welding Methods 0.000 claims abstract description 13
- 239000000203 mixture Substances 0.000 claims abstract description 4
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical group [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 11
- 239000006087 Silane Coupling Agent Substances 0.000 claims description 10
- ZWRUINPWMLAQRD-UHFFFAOYSA-N nonan-1-ol Chemical class CCCCCCCCCO ZWRUINPWMLAQRD-UHFFFAOYSA-N 0.000 claims description 9
- ISWSIDIOOBJBQZ-UHFFFAOYSA-N Phenol Chemical compound OC1=CC=CC=C1 ISWSIDIOOBJBQZ-UHFFFAOYSA-N 0.000 claims description 8
- 238000007599 discharging Methods 0.000 claims description 8
- 239000000654 additive Substances 0.000 claims description 7
- 230000000996 additive effect Effects 0.000 claims description 7
- 150000001408 amides Chemical class 0.000 claims description 7
- 229910001510 metal chloride Inorganic materials 0.000 claims description 7
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims description 6
- 150000001412 amines Chemical class 0.000 claims description 6
- 238000002156 mixing Methods 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 229910052710 silicon Inorganic materials 0.000 claims description 4
- 239000010703 silicon Substances 0.000 claims description 4
- FBPFZTCFMRRESA-FSIIMWSLSA-N D-Glucitol Natural products OC[C@H](O)[C@H](O)[C@@H](O)[C@H](O)CO FBPFZTCFMRRESA-FSIIMWSLSA-N 0.000 claims description 3
- 150000007942 carboxylates Chemical class 0.000 claims description 3
- 238000001125 extrusion Methods 0.000 claims description 3
- 229910021389 graphene Inorganic materials 0.000 claims description 3
- 238000010438 heat treatment Methods 0.000 claims description 3
- 238000002844 melting Methods 0.000 claims description 3
- 230000008018 melting Effects 0.000 claims description 3
- 229910052698 phosphorus Inorganic materials 0.000 claims description 3
- 239000011574 phosphorus Substances 0.000 claims description 3
- 229920006395 saturated elastomer Polymers 0.000 claims description 3
- 239000000600 sorbitol Substances 0.000 claims description 3
- FBPFZTCFMRRESA-JGWLITMVSA-N D-glucitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)[C@H](O)CO FBPFZTCFMRRESA-JGWLITMVSA-N 0.000 claims description 2
- 229910019142 PO4 Inorganic materials 0.000 claims description 2
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 claims description 2
- TVXBFESIOXBWNM-UHFFFAOYSA-N Xylitol Natural products OCCC(O)C(O)C(O)CCO TVXBFESIOXBWNM-UHFFFAOYSA-N 0.000 claims description 2
- RUOKPLVTMFHRJE-UHFFFAOYSA-N benzene-1,2,3-triamine Chemical class NC1=CC=CC(N)=C1N RUOKPLVTMFHRJE-UHFFFAOYSA-N 0.000 claims description 2
- HEBKCHPVOIAQTA-UHFFFAOYSA-N meso ribitol Natural products OCC(O)C(O)C(O)CO HEBKCHPVOIAQTA-UHFFFAOYSA-N 0.000 claims description 2
- GKTNLYAAZKKMTQ-UHFFFAOYSA-N n-[bis(dimethylamino)phosphinimyl]-n-methylmethanamine Chemical compound CN(C)P(=N)(N(C)C)N(C)C GKTNLYAAZKKMTQ-UHFFFAOYSA-N 0.000 claims description 2
- 239000010452 phosphate Substances 0.000 claims description 2
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 claims description 2
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 claims description 2
- 239000000811 xylitol Substances 0.000 claims description 2
- HEBKCHPVOIAQTA-SCDXWVJYSA-N xylitol Chemical compound OC[C@H](O)[C@@H](O)[C@H](O)CO HEBKCHPVOIAQTA-SCDXWVJYSA-N 0.000 claims description 2
- 229960002675 xylitol Drugs 0.000 claims description 2
- 235000010447 xylitol Nutrition 0.000 claims description 2
- 238000002834 transmittance Methods 0.000 abstract description 17
- 239000002994 raw material Substances 0.000 abstract description 5
- 230000005540 biological transmission Effects 0.000 abstract description 4
- 238000013329 compounding Methods 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 7
- 241001670226 Equus caballus x asinus Species 0.000 description 4
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- 230000002776 aggregation Effects 0.000 description 3
- 238000004220 aggregation Methods 0.000 description 3
- 238000002425 crystallisation Methods 0.000 description 3
- 230000008025 crystallization Effects 0.000 description 3
- 239000012779 reinforcing material Substances 0.000 description 3
- -1 silicon alkene Chemical class 0.000 description 3
- 239000003738 black carbon Substances 0.000 description 2
- 239000006229 carbon black Substances 0.000 description 2
- 239000013078 crystal Substances 0.000 description 2
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- 239000003822 epoxy resin Substances 0.000 description 2
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- 229920000647 polyepoxide Polymers 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
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- 229920006345 thermoplastic polyamide Polymers 0.000 description 2
- 239000012745 toughening agent Substances 0.000 description 2
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- 238000005299 abrasion Methods 0.000 description 1
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- 230000009286 beneficial effect Effects 0.000 description 1
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- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
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- 238000011049 filling Methods 0.000 description 1
- LNEPOXFFQSENCJ-UHFFFAOYSA-N haloperidol Chemical compound C1CC(O)(C=2C=CC(Cl)=CC=2)CCN1CCCC(=O)C1=CC=C(F)C=C1 LNEPOXFFQSENCJ-UHFFFAOYSA-N 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 229910021645 metal ion Inorganic materials 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
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- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
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- 238000007670 refining Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 229910052723 transition metal Inorganic materials 0.000 description 1
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Landscapes
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The invention relates to the technical field of laser welding materials, in particular to a polyamide composite material and a preparation method and application thereof, wherein the polyamide composite material comprises the following components in parts by weight: 30-70 parts of conventional nylon, 5-15 parts of special nylon, 15-40 parts of glass fiber, 0.1-3 parts of nucleating agent, 0.1-5 parts of antioxidant auxiliary agent, 0.1-3 parts of lubricant, 0.1-3 parts of anti-reflection agent and 0.1-3 parts of organic toner. The invention adopts the mixture of special nylon and common nylon as the main raw material, adopts the compounding of flat glass fiber and round glass fiber, and utilizes the antioxidant auxiliary agent composed of copper salt antioxidant and composite antioxidant to improve the light transmittance while meeting the mechanical property of the material. According to the invention, the inorganic toner is replaced by the organic toner, so that the inorganic toner can be prevented from absorbing light waves, the light transmission performance of the material is improved, and the subsequent welding is facilitated.
Description
Technical Field
The invention relates to the technical field of laser welding materials, in particular to a polyamide composite material and a preparation method and application thereof.
Background
The glass fiber can be used as a reinforcing material for reinforcing plastics due to the characteristic of high tensile strength; the nylon material has good comprehensive properties, particularly including good mechanical properties, heat resistance, abrasion resistance, chemical resistance and self-lubricating property, low friction coefficient, certain flame retardance and easy processing, and is suitable for filling, reinforcing and modifying by glass fibers.
The existing laser welding material often adopts a mixed system of nylon and glass fiber, and CN105199381A discloses a high-light-transmission glass fiber reinforced polyamide material which can be used as a light-transmission layer material under the condition of normal natural color without adding any toner. However, with the addition of conventional toners, particularly dark toners, the light transmission of the material will be so greatly attenuated that normal welding operations are not possible. The laser welding material has high requirements on mechanical properties, but the antioxidant component added in the raw material contains ions capable of absorbing infrared light, which often leads to the reduction of light transmittance.
CN114987019a discloses a color-selectable, laser-welded nylon composite material, which comprises a light-transmitting layer granule and a light-absorbing layer granule, wherein the light-transmitting layer granule comprises thermoplastic polyamide resin, a reinforcing material, a transparent toughening agent and toner; the light-absorbing layer granule thermoplastic polyamide resin, the reinforcing material, the toughening agent, the black matrix and the organic black matrix, namely, in the patent application, carbon black (inorganic black matrix) is added besides the organic black matrix, and the inorganic toner is easy to absorb light waves and affects the laser light transmittance.
Therefore, the laser welding material in the prior art cannot have the characteristics of high heat resistance and high laser transmittance, and cannot be widely applied to welding of an engine and peripheral parts thereof.
Disclosure of Invention
The invention aims to provide a polyamide composite material, a preparation method and application thereof, so as to solve the problems in the background technology.
The invention is realized by the following technical scheme:
the polyamide composite material comprises the following components in parts by weight:
30-70 parts of conventional nylon, wherein PA66 is selected as the conventional nylon;
5-15 parts of special nylon, wherein the special nylon is transparent nylon and/or long carbon chain nylon, and the special nylon is used for reducing the crystallization speed and the crystallization degree of conventional nylon, so that infrared light is easier to penetrate, and meanwhile, glass fibers can be uniformly dispersed due to the lower crystallization speed, and the aggregation of the glass fibers is avoided, so that the light transmittance is reduced;
15-40 parts of glass fiber, wherein the glass fiber is compounded by flat glass fiber and round glass fiber, and the weight ratio of the flat glass fiber to the round glass fiber is 5-35: 65-95, because the traditional round glass fiber has better mechanical properties and the flat glass fiber has small anisotropy, the flat glass fiber and the round glass fiber with the proportion can effectively balance the mechanical properties and uniformity of the material, avoid the aggregation of the glass fiber and avoid influencing the light transmittance of the material;
0.1-3 parts of nucleating agent, wherein the nucleating agent is used for refining crystal lattices of nylon, so that the size of the crystal lattices is smaller than the wavelength of infrared light, and finally, higher light transmittance is obtained;
0.1-5 parts of antioxidant auxiliary agent, wherein the antioxidant auxiliary agent comprises copper salt antioxidant for meeting the mechanical property of a material and composite antioxidant for improving the light transmittance of the material, and the weight ratio of the copper salt antioxidant to the composite antioxidant is 1: 10-20, wherein the copper salt antioxidant can influence the light transmittance of the material, but the proportion can stabilize the light transmittance while meeting the mechanical property of the material;
0.1-3 parts of a lubricant selected from a silicon lubricant and/or an amide lubricant;
0.1-3 parts of an anti-reflection agent, wherein the anti-reflection agent comprises metal chloride, and metal ions form complexation with amide bonds of nylon, so that polar hydrogen bonds between molecular chains can be effectively prevented from being formed, the increase of crystallinity is avoided, and the laser light transmittance is further effectively improved;
0.1 to 3 parts of organic toner, and the organic toner is used for replacing inorganic toner, so that the inorganic toner such as carbon black can be prevented from absorbing light waves, the light transmission performance of the material is improved, and the subsequent welding is facilitated.
Preferably, the special nylon is long carbon chain bio-based transparent nylon HiNNY TN.
Preferably, the nucleating agent is selected from at least one of long-chain saturated linear carboxylate, sorbitol, nonanol, xylitol, phosphorus and triaminobenzene derivatives.
Preferably, the compound antioxidant is selected from at least two of hindered phenol antioxidants, hindered amine antioxidants, phosphite antioxidants, phosphate antioxidants and epoxy resins.
As a further aspect of the present invention, the polyamide composite material further comprises: 0.1 to 0.3 weight portion of silane coupling agent modified light-transmitting material, wherein the light-transmitting material is at least one selected from the group consisting of phosphazene, silicon alkene, graphene and graphene-like.
The invention also provides a preparation method of the polyamide composite material, which comprises the following steps:
S1, adding conventional nylon and special nylon into a mixer according to the formula amount, and mixing for 10-15min to obtain a premix;
S2, adding the nucleating agent, the antioxidant auxiliary agent, the lubricant, the anti-reflection agent and the organic toner into a mixer according to the formula amount, and mixing for 3-5 min to obtain an additive premix;
And S3, uniformly adding the premix obtained in the step S1 and the additive premix obtained in the step S2 into a main feeding and discharging barrel of the double-screw extruder, and putting glass fiber or a mixture of the glass fiber and the modifying component into the double-screw extruder through a lateral feeding and discharging barrel, and heating, melting, extruding and granulating to obtain the polyamide composite material.
Preferably, the modifying component comprises a silane coupling agent modified light-transmitting material, wherein the light-transmitting material is at least one selected from the group consisting of phosphorus alkene, silicon alkene, graphene and graphene-like, and the graphene-like is specifically transition metal carbide.
As a further aspect of the present invention, the modifying component is coated on the surface of the glass fiber or is directly mixed with the glass fiber.
Preferably, the extrusion temperature of the twin-screw extruder is 250-280 ℃, and the screw rotation speed is 280-350 rmp.
The invention also provides application of the polyamide composite material in laser welding parts, including but not limited to engines and parts thereof.
Compared with the prior art, the invention has the beneficial effects that:
1. the invention adopts the mixture of special nylon and common nylon as the main raw material, and utilizes the antioxidant auxiliary agent composed of the copper salt antioxidant and the composite antioxidant to improve the light transmittance while meeting the mechanical property of the material.
2. The invention adopts the combination of the flat glass fiber and the round glass fiber, can effectively balance the mechanical property and uniformity of the material, avoids the aggregation of the glass fiber and avoids influencing the light transmittance of the material.
3. According to the invention, the inorganic toner is replaced by the organic toner, so that the inorganic toner can be prevented from absorbing light waves, the light transmission performance of the material is improved, and the subsequent welding is facilitated.
Detailed Description
The following description of the technical solutions in the embodiments of the present invention will be clear and complete, and it is obvious that the described embodiments are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Example 1:
The embodiment provides a polyamide composite material, which comprises the following components in parts by weight: 30 parts of nylon PA66, 15 parts of transparent nylon, 5 parts of flat glass fiber, 15 parts of round glass fiber, 3 parts of nucleating agent long-chain saturated linear carboxylate, 0.2 part of copper salt antioxidant, 2 parts of hindered phenol antioxidant, 2 parts of epoxy resin, 3 parts of amide lubricant, 3 parts of anti-reflection agent metal chloride and 1.8 parts of organic toner.
The embodiment also provides a preparation method of the polyamide composite material, which specifically comprises the following steps:
s1, adding conventional nylon and special nylon into a mixer according to the formula amount, and mixing for 10-15 min to obtain a premix;
s2, adding the nucleating agent, the antioxidant auxiliary agent, the lubricant, the anti-reflection agent and the organic toner into a mixer according to the formula amount, and mixing for 3-5 min to obtain an additive premix;
And S3, uniformly adding the premix obtained in the step S1 and the additive premix obtained in the step S2 into a main feeding and discharging barrel of a double-screw extruder, putting glass fibers into the double-screw extruder through a lateral feeding and discharging barrel, and heating, melting, extruding and granulating to obtain the polyamide composite material, wherein the extrusion temperature of the double-screw extruder is 250-280 ℃, and the screw rotating speed is 280-350 rmp.
Example 2:
The embodiment provides a polyamide composite material, which comprises the following components in parts by weight: 40 parts of nylon PA66, 15 parts of transparent nylon, 5 parts of flat glass fiber, 15 parts of round glass fiber, 2 parts of sorbitol nucleating agent, 0.1 part of copper salt antioxidant, 0.5 part of hindered phenol antioxidant, 0.5 part of hindered amine antioxidant, 2 parts of amide lubricant, 3 parts of anti-reflection agent metal chloride and 1.9 parts of organic toner.
The procedure for the preparation of the polyamide composite material provided in this example is identical to that of example 1.
Example 3:
The embodiment provides a polyamide composite material, which comprises the following components in parts by weight: 50 parts of nylon PA66, 10 parts of long carbon chain bio-based transparent nylon HiNNY TN, 3 parts of flat glass fiber, 17 parts of round glass fiber, 2 parts of nonanol nucleating agent, 0.05 part of copper salt antioxidant, 0.35 part of hindered phenol antioxidant, 0.5 part of hindered amine antioxidant, 2 parts of amide lubricant, 3 parts of anti-reflection agent metal chloride, 2 parts of organic toner and 0.1 part of silane coupling agent modified silylene.
In the steps of the preparation method of the polyamide composite material provided by the embodiment, the difference from the embodiment 1 is that in the step S3, premix and additive premix are uniformly added into a main feeding and discharging barrel of a double-screw extruder, and the glass fiber and silane coupling agent modified silylene mixed materials with set weight parts are put into the double-screw extruder through a lateral feeding and discharging barrel, heated, melted, extruded and pelletized to obtain the polyamide composite material, and the balance is the same as the embodiment 1.
Example 4:
The embodiment provides a polyamide composite material, which comprises the following components in parts by weight: 56 parts of nylon PA66, 10 parts of long carbon chain bio-based transparent nylon HiNNY TN, 3 parts of flat glass fiber, 17 parts of round glass fiber, 0.5 part of nonanol nucleating agent, 0.05 part of copper salt antioxidant, 0.25 part of hindered phenol antioxidant, 0.5 part of hindered amine antioxidant, 0.5 part of amide lubricant, 1 part of anti-reflection agent metal chloride, 1 part of organic toner and 0.2 part of silane coupling agent modified silylene.
The procedure for the preparation of the polyamide composite material provided in this example is identical to that of example 3.
Example 5:
The embodiment provides a polyamide composite material, which comprises the following components in parts by weight: 70 parts of nylon PA66, 5 parts of long carbon chain bio-based transparent nylon HiNNY TN, 3 parts of flat glass fiber, 17 parts of round glass fiber, 2 parts of nonanol nucleating agent, 0.05 part of copper salt antioxidant, 0.25 part of hindered phenol antioxidant, 0.4 part of hindered amine antioxidant, 2 parts of amide lubricant, 3 parts of anti-reflection agent metal chloride, 2 parts of organic toner and 0.3 part of silane coupling agent modified graphene.
The procedure for the preparation of the polyamide composite material provided in this example is identical to that of example 3.
The polyamide composite materials provided in embodiments 1-5 of the present invention can be used for laser welded parts, including but not limited to engines and their components.
Comparative example 1:
the polyamide composite material provided in comparative example 1 is different from example 3 in that the glass fibers are round glass fibers, 0.9 parts by weight of copper salt is used as an antioxidant auxiliary agent, 2.1 parts by weight of inorganic toner black carbon is used as a toner, the raw materials do not contain modified components, and the rest components and the preparation method are the same as those in example 3.
Comparative example 2:
The polyamide composite material provided in comparative example 2 is different from example 4 in that flat glass fibers are adopted as glass fibers, copper salt-free composite antioxidants are adopted as antioxidant auxiliary agents, specifically 0.8 part by weight of hindered phenol antioxidants are adopted as antioxidant auxiliary agents, 1.2 parts by weight of inorganic toner black carbon is adopted as toner, the raw materials do not contain modified components, and the rest components and the preparation method are the same as those in example 3.
The components of the polyamide composite materials provided in the examples of the present invention and comparative examples are shown in Table 1.
TABLE 1
The polyamide composite materials provided in examples 1 to 5 and comparative examples 1 to 2 were subjected to laser light transmittance detection, respectively, and the detection results are shown in table 2.
TABLE 2
As can be seen from Table 2, the polyamide composite material provided by the example of the present invention has better laser light transmittance than the comparative example, wherein the polyamide composite material provided by the example 4 has the highest laser light transmittance. Therefore, the mechanical properties of the polyamide composite material provided in example 4 were examined, and the results were as follows: the tensile strength is 140MPa, the tensile retention rate of 3000H at 150 ℃ is 103%, the notch impact strength is 9KJ/m 2, the notch impact retention rate of 3000H at 150 ℃ is 75%, and the spiral flow length is 45cm at 280 ℃, namely the polyamide composite material provided in the example 4 has better mechanical properties while improving the laser light transmittance, and is convenient for subsequent welding.
The preferred embodiments of the invention disclosed above are intended only to assist in the explanation of the invention. The preferred embodiments are not exhaustive or to limit the invention to the precise form disclosed. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the invention and the practical application, thereby enabling others skilled in the art to best utilize the invention
The present invention is well understood and utilized. The invention is limited only by the claims and the full scope and equivalents thereof.
Claims (6)
1. The polyamide composite material is characterized by comprising the following components in parts by weight:
30-70 parts of conventional nylon, wherein PA66 is selected as the conventional nylon;
5-15 parts of special nylon, wherein the special nylon is transparent nylon and/or long carbon chain nylon;
15-40 parts of glass fiber, wherein the glass fiber is compounded by flat glass fiber and round glass fiber, and the weight ratio of the flat glass fiber to the round glass fiber is 5-35: 65-95;
0.1-3 parts of nucleating agent;
0.1-5 parts of an antioxidant auxiliary agent, wherein the antioxidant auxiliary agent is composed of a copper salt antioxidant and a composite antioxidant, the composite antioxidant is at least two selected from a hindered phenol antioxidant, a hindered amine antioxidant, a phosphite antioxidant and a phosphate antioxidant, and the weight ratio of the copper salt antioxidant to the composite antioxidant is 1: 10-20 parts of a base;
0.1-3 parts of a lubricant, wherein the lubricant is selected from a silicon lubricant and/or an amide lubricant;
0.1-3 parts of an anti-reflection agent, wherein the anti-reflection agent comprises metal chloride;
0.1-3 parts of organic toner;
0.1-0.3 part of silane coupling agent modified light-transmitting material, wherein the light-transmitting material is at least one selected from phosphazene, silylene and graphene, and the silane coupling agent modified light-transmitting material is coated on the surface of glass fiber or is directly mixed with the glass fiber.
2. The polyamide composite material of claim 1, wherein said specialty nylon is a long carbon chain bio-based clear nylon.
3. The polyamide composite material according to claim 1, wherein said nucleating agent is at least one selected from the group consisting of long chain saturated linear carboxylates, sorbitol, nonanols, xylitol, phosphorus, and triaminobenzene derivatives.
4. A method for preparing a polyamide composite material according to claim 1, comprising the steps of:
s1, adding conventional nylon and special nylon into a mixer according to the formula amount, and mixing for 10-15 min to obtain a premix;
S2, adding a nucleating agent, an antioxidant auxiliary agent, a lubricant, an anti-reflection agent and organic toner into a mixer according to the formula amount, and mixing for 3-5 minutes to obtain an additive premix;
And S3, uniformly adding the premix obtained in the step S1 and the additive premix obtained in the step S2 into a main feeding and discharging barrel of the double-screw extruder, and adding glass fiber coated with the silane coupling agent modified light-transmitting material or a mixture of the glass fiber and the silane coupling agent modified light-transmitting material into the double-screw extruder through a lateral feeding and discharging barrel, and heating, melting, extruding and granulating to obtain the polyamide composite material.
5. The method for preparing a polyamide composite material according to claim 4, wherein the extrusion temperature of the twin-screw extruder is 250-280 ℃, and the screw rotation speed is 280-350 rmp.
6. Use of a polyamide composite material according to any one of claims 1-3 in laser welding parts.
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| CN202211597953.1A CN115819967B (en) | 2022-12-12 | 2022-12-12 | Polyamide composite material and preparation method and application thereof |
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| CN202211597953.1A CN115819967B (en) | 2022-12-12 | 2022-12-12 | Polyamide composite material and preparation method and application thereof |
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| CN115819967B true CN115819967B (en) | 2024-05-03 |
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