CN117126525A - Modified polycarbonate light-absorbing transparent plastic for laser welding and preparation method thereof - Google Patents
Modified polycarbonate light-absorbing transparent plastic for laser welding and preparation method thereof Download PDFInfo
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- CN117126525A CN117126525A CN202311220778.9A CN202311220778A CN117126525A CN 117126525 A CN117126525 A CN 117126525A CN 202311220778 A CN202311220778 A CN 202311220778A CN 117126525 A CN117126525 A CN 117126525A
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- 239000004417 polycarbonate Substances 0.000 title claims abstract description 144
- 229920000515 polycarbonate Polymers 0.000 title claims abstract description 144
- 238000003466 welding Methods 0.000 title claims abstract description 103
- 229920003023 plastic Polymers 0.000 title claims abstract description 78
- 238000002360 preparation method Methods 0.000 title claims abstract description 31
- 238000002156 mixing Methods 0.000 claims abstract description 57
- 239000002002 slurry Substances 0.000 claims abstract description 56
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 54
- 239000000314 lubricant Substances 0.000 claims abstract description 54
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 53
- 239000004952 Polyamide Substances 0.000 claims abstract description 45
- 229920002647 polyamide Polymers 0.000 claims abstract description 45
- 229920006346 thermoplastic polyester elastomer Polymers 0.000 claims abstract description 42
- 238000003756 stirring Methods 0.000 claims abstract description 32
- 230000031700 light absorption Effects 0.000 claims abstract description 24
- 239000002994 raw material Substances 0.000 claims abstract description 18
- 238000001035 drying Methods 0.000 claims abstract description 13
- 239000006096 absorbing agent Substances 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 21
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 claims description 16
- 239000002041 carbon nanotube Substances 0.000 claims description 16
- 229910021393 carbon nanotube Inorganic materials 0.000 claims description 16
- JRPBQTZRNDNNOP-UHFFFAOYSA-N barium titanate Chemical compound [Ba+2].[Ba+2].[O-][Ti]([O-])([O-])[O-] JRPBQTZRNDNNOP-UHFFFAOYSA-N 0.000 claims description 15
- 229910002113 barium titanate Inorganic materials 0.000 claims description 15
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 14
- ZMXDDKWLCZADIW-UHFFFAOYSA-N N,N-Dimethylformamide Chemical compound CN(C)C=O ZMXDDKWLCZADIW-UHFFFAOYSA-N 0.000 claims description 13
- 235000013855 polyvinylpyrrolidone Nutrition 0.000 claims description 13
- 229920000036 polyvinylpyrrolidone Polymers 0.000 claims description 13
- 239000001267 polyvinylpyrrolidone Substances 0.000 claims description 13
- 238000005303 weighing Methods 0.000 claims description 12
- BGYHLZZASRKEJE-UHFFFAOYSA-N [3-[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxy]-2,2-bis[3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoyloxymethyl]propyl] 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CC(C)(C)C1=C(O)C(C(C)(C)C)=CC(CCC(=O)OCC(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)(COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)COC(=O)CCC=2C=C(C(O)=C(C=2)C(C)(C)C)C(C)(C)C)=C1 BGYHLZZASRKEJE-UHFFFAOYSA-N 0.000 claims description 10
- TXQVDVNAKHFQPP-UHFFFAOYSA-N [3-hydroxy-2,2-bis(hydroxymethyl)propyl] octadecanoate Chemical compound CCCCCCCCCCCCCCCCCC(=O)OCC(CO)(CO)CO TXQVDVNAKHFQPP-UHFFFAOYSA-N 0.000 claims description 10
- JKIJEFPNVSHHEI-UHFFFAOYSA-N Phenol, 2,4-bis(1,1-dimethylethyl)-, phosphite (3:1) Chemical compound CC(C)(C)C1=CC(C(C)(C)C)=CC=C1OP(OC=1C(=CC(=CC=1)C(C)(C)C)C(C)(C)C)OC1=CC=C(C(C)(C)C)C=C1C(C)(C)C JKIJEFPNVSHHEI-UHFFFAOYSA-N 0.000 claims description 3
- CJZGTCYPCWQAJB-UHFFFAOYSA-L calcium stearate Chemical compound [Ca+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O CJZGTCYPCWQAJB-UHFFFAOYSA-L 0.000 claims description 3
- 239000008116 calcium stearate Substances 0.000 claims description 3
- 235000013539 calcium stearate Nutrition 0.000 claims description 3
- SSDSCDGVMJFTEQ-UHFFFAOYSA-N octadecyl 3-(3,5-ditert-butyl-4-hydroxyphenyl)propanoate Chemical compound CCCCCCCCCCCCCCCCCCOC(=O)CCC1=CC(C(C)(C)C)=C(O)C(C(C)(C)C)=C1 SSDSCDGVMJFTEQ-UHFFFAOYSA-N 0.000 claims description 3
- XOOUIPVCVHRTMJ-UHFFFAOYSA-L zinc stearate Chemical compound [Zn+2].CCCCCCCCCCCCCCCCCC([O-])=O.CCCCCCCCCCCCCCCCCC([O-])=O XOOUIPVCVHRTMJ-UHFFFAOYSA-L 0.000 claims description 3
- 238000001132 ultrasonic dispersion Methods 0.000 claims description 2
- 239000004033 plastic Substances 0.000 abstract description 11
- 230000003287 optical effect Effects 0.000 abstract description 3
- 238000004023 plastic welding Methods 0.000 abstract description 3
- 239000012815 thermoplastic material Substances 0.000 abstract description 2
- 239000000203 mixture Substances 0.000 description 15
- 230000002745 absorbent Effects 0.000 description 9
- 239000002250 absorbent Substances 0.000 description 9
- 230000000052 comparative effect Effects 0.000 description 9
- 239000011347 resin Substances 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 229920003229 poly(methyl methacrylate) Polymers 0.000 description 3
- 239000004926 polymethyl methacrylate Substances 0.000 description 3
- 238000010521 absorption reaction Methods 0.000 description 2
- 238000004220 aggregation Methods 0.000 description 2
- 230000002776 aggregation Effects 0.000 description 2
- IISBACLAFKSPIT-UHFFFAOYSA-N bisphenol A Chemical group C=1C=C(O)C=CC=1C(C)(C)C1=CC=C(O)C=C1 IISBACLAFKSPIT-UHFFFAOYSA-N 0.000 description 2
- 239000006185 dispersion Substances 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000001556 precipitation Methods 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 239000004793 Polystyrene Substances 0.000 description 1
- 125000003118 aryl group Chemical group 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
- 238000013329 compounding Methods 0.000 description 1
- 239000006258 conductive agent Substances 0.000 description 1
- 238000005336 cracking Methods 0.000 description 1
- 238000010292 electrical insulation Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 229920006351 engineering plastic Polymers 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000011256 inorganic filler Substances 0.000 description 1
- 229910003475 inorganic filler Inorganic materials 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000002923 metal particle Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 239000002048 multi walled nanotube Substances 0.000 description 1
- 231100000956 nontoxicity Toxicity 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000002310 reflectometry Methods 0.000 description 1
- 239000004065 semiconductor Substances 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000002834 transmittance Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/02—Elements
- C08K3/08—Metals
- C08K2003/0806—Silver
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K2201/00—Specific properties of additives
- C08K2201/011—Nanostructured additives
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2207/00—Properties characterising the ingredient of the composition
- C08L2207/04—Thermoplastic elastomer
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
- Organic Chemistry (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Compositions Of Macromolecular Compounds (AREA)
Abstract
The application relates to the technical field of laser plastic welding, and in particular discloses modified polycarbonate light-absorbing transparent plastic for laser welding and a preparation method thereof, wherein the modified polycarbonate light-absorbing transparent plastic for laser welding comprises the following raw materials: polycarbonates, polyamides, thermoplastic polyester elastomers, light absorbing slurries, lubricants, antioxidants; the preparation method comprises the steps of pre-drying polycarbonate, adding the pre-dried polycarbonate, polyamide, thermoplastic polyester elastomer, light absorption slurry, lubricant and antioxidant into a mixing mill together, stirring, mixing, extruding and granulating to obtain the modified polycarbonate; the application uses the polycarbonate, the polyamide and the thermoplastic polyester elastomer together for producing the laser welding plastic, and the polycarbonate, the polyamide and the thermoplastic polyester elastomer are all thermoplastic materials, have good processability, can realize characteristic complementation in common, obviously improve the overall strength, the toughness, the thermal stability and the impact resistance of the welding plastic, and optimize the optical performance of the welding plastic; thereby improving the laser welding efficiency and welding quality.
Description
Technical Field
The application relates to the technical field of laser plastic welding, in particular to modified polycarbonate light-absorbing transparent plastic for laser welding and a preparation method thereof.
Background
The laser transmission welding plastic technology is an emerging welding technology, and compared with the traditional plastic welding modes such as a hot plate welding method, a hot gas welding method, an electromagnetic induction welding method, a resistance induction welding method, a friction welding method, an ultrasonic welding method, a radio frequency welding method and the like, the laser transmission welding method has the advantages of high welding speed, high automation degree, small heat affected zone, small processing stress, no contact, no residue, accuracy, high bonding strength, small welding seam deformation, energy conservation, environmental protection and the like, and plastic products welded by the laser transmission welding method are widely applied to the fields of automobile part manufacturing, medical treatment, electronics, food packaging and the like, and have received wide attention at home and abroad.
Polycarbonate (PC) is a widely used high-performance engineering plastic, is a transparent colorless or yellowish tough solid, has transparency as high as 90%, is inferior to polymethyl methacrylate (PMMA) and Polystyrene (PS), has good comprehensive mechanical properties, is rigid and tough, has good light transmittance, impact resistance, dimensional stability, electrical insulation performance, heat resistance and nontoxicity, can maintain higher mechanical strength in a larger temperature range, but has poor fatigue resistance, wear resistance and lubricity, and is easy to generate stress cracking. In the related art, polycarbonate is modified by adding other resins or inorganic fillers, but PC has poor compatibility with other resins, so that a uniform blending system is not easy to form, and the mechanical property and transparency of the polycarbonate are easy to be reduced. In addition, the absorption rate of the polycarbonate for laser welding is low, an external light absorber is often needed, and the dispersibility of the commonly used external light absorber such as carbon black, metal particles and the like in a polycarbonate system and the combination ratio of the commonly used external light absorber and resin are relatively poor, so that the performance of a polycarbonate plastic product can be influenced, and the welding quality of the polycarbonate can be further influenced. Based on the above statement, the application provides a modified polycarbonate light-absorbing transparent plastic for laser welding and a preparation method thereof.
Disclosure of Invention
The application provides a modified polycarbonate light-absorbing transparent plastic for laser welding and a preparation method thereof, aiming at solving the problems that the dispersibility of the existing external light-absorbing agent in a polycarbonate system and the binding force with resin are poor, the welding quality of polycarbonate plastic is affected and the like.
In a first aspect, the application provides a modified polycarbonate light-absorbing transparent plastic for laser welding, which adopts the following technical scheme:
the modified polycarbonate light-absorbing transparent plastic for laser welding comprises the following raw materials in parts by weight: 70-90 parts of polycarbonate, 18-30 parts of polyamide, 5-10 parts of thermoplastic polyester elastomer, 2-5 parts of light absorption slurry, 0.5-1 part of lubricant and 0.5-1 part of antioxidant.
Preferably, the modified polycarbonate light-absorbing transparent plastic for laser welding comprises the following raw materials in parts by weight: 75-85 parts of polycarbonate, 22-26 parts of polyamide, 6-8 parts of thermoplastic polyester elastomer, 2.5-4.5 parts of light absorbing slurry, 0.6-0.8 part of lubricant and 0.6-0.8 part of antioxidant.
Preferably, the modified polycarbonate light-absorbing transparent plastic for laser welding comprises the following raw materials in parts by weight: 80 parts of polycarbonate, 24 parts of polyamide, 7 parts of thermoplastic polyester elastomer, 3.5 parts of light absorbing slurry, 0.7 part of lubricant and 0.7 part of antioxidant.
Preferably, the light absorbing slurry is prepared by mixing a light absorbing agent, N' N-dimethylformamide and polyvinylpyrrolidone and then performing ultrasonic dispersion.
Preferably, the mass ratio of the light absorber to the N' N-dimethylformamide to the polyvinylpyrrolidone is 1:1.8-2.2:0.1-0.2.
Preferably, the ultrasonic power is 500-600W, and the ultrasonic time is 1-2h.
Preferably, the lubricant is at least one of pentaerythritol stearate, zinc stearate and calcium stearate.
Preferably, the antioxidant is at least one of antioxidant 1010, antioxidant 1076 and antioxidant 168.
In a second aspect, the application provides a preparation method of modified polycarbonate light-absorbing transparent plastic for laser welding, which adopts the following technical scheme:
the preparation method of the modified polycarbonate light-absorbing transparent plastic for laser welding specifically comprises the following preparation steps:
s1, weighing polycarbonate, polyamide, thermoplastic polyester elastomer, light absorption slurry, lubricant and antioxidant according to parts by weight for standby;
s2, pre-drying the polycarbonate, adding the pre-dried polycarbonate, the polyamide, the thermoplastic polyester elastomer, the light absorption slurry, the lubricant and the antioxidant into a mixing mill, stirring, mixing, extruding and granulating to obtain the modified polycarbonate light absorption transparent plastic for laser welding.
In summary, the application has the following beneficial effects:
the application uses the polycarbonate, the polyamide and the thermoplastic polyester elastomer together for producing the laser welding plastic, the polycarbonate, the polyamide and the thermoplastic polyester elastomer are all thermoplastic materials, have good processability, and the three materials can realize characteristic complementation, obviously improve the overall strength, the toughness, the thermal stability and the impact resistance of the welding plastic and optimize the optical performance of the welding plastic; and furthermore, the welding parts with complex shapes are easier to manufacture, and the laser welding efficiency and the welding quality are improved.
According to the application, the carbon nano tube, the nano barium titanate and the nano silver are compounded to be used as light absorbers, and the carbon nano tube, the nano barium titanate and the nano silver respectively have different optical characteristics, in addition, the carbon nano tube has higher electric conduction and heat conduction properties on the nano scale, and in the welding process, the energy can be more effectively transferred to a welding area, so that local heating and melting are realized; the three components are used in a compounding way, so that the laser energy is converted into heat energy, the absorption capacity of the laser is enhanced in different wavelength ranges, the light absorption efficiency is improved, and the welding process is promoted; meanwhile, the addition amount of the light absorber is reduced, and the cost is further reduced.
According to the application, the light absorber is prepared into the light absorbing slurry in advance and then added into the polycarbonate system, so that the addition amount of the light absorber can be controlled more accurately, uniform and stable dispersion of the light absorber in the polycarbonate system can be realized, precipitation or aggregation of the light absorber components can be prevented, further, the light absorber can be ensured to be fully utilized, and the laser welding efficiency can be improved.
Detailed Description
The present application will be described in further detail with reference to examples.
The raw materials used in the examples are as follows: the polycarbonate is bisphenol A type aromatic polycarbonate, the weight average molecular weight is 21500, 1300-10NP, LG chemistry; the viscosity of the polyamide is 90-180/mPa.s (25 ℃), HY-388, anhui iridtai New Material Co., ltd; thermoplastic polyester elastomer KP3355, kelong chemical industry; the content of nano barium titanate is more than or equal to 99.9%, and the average grain diameter is 100nm; the purity of the nano silver is more than or equal to 99.9%, and the average grain diameter is 20nm; the carbon nano tube is multi-wall carbon nano tube, the purity is more than or equal to 95 percent, the length is 20-50um, and the diameter is 8-14nm.
Example 1
The application provides a modified polycarbonate light-absorbing transparent plastic for laser welding, which adopts the following technical scheme:
the modified polycarbonate light-absorbing transparent plastic for laser welding comprises the following raw materials in parts by weight: 70 parts of polycarbonate, 18 parts of polyamide, 5 parts of thermoplastic polyester elastomer, 2 parts of light absorbing slurry, 0.5 part of lubricant and 0.5 part of antioxidant;
wherein the light absorbing slurry is prepared by the following method:
a1, uniformly stirring and mixing the carbon nano tube, the nano barium titanate and the nano silver according to the mass ratio of 1:0.4:0.1 to obtain a light absorbent;
a2, mixing a light absorbing agent, N' N-dimethylformamide and polyvinylpyrrolidone according to a mass ratio of 1:1.8:0.1, controlling the ultrasonic power to be 500W, and dispersing for 2 hours to prepare light absorbing slurry;
the lubricant is pentaerythritol stearate;
the antioxidant is antioxidant 1010.
The application also provides a preparation method of the modified polycarbonate light-absorbing transparent plastic for laser welding, which specifically comprises the following preparation steps:
s1, weighing polycarbonate, polyamide, thermoplastic polyester elastomer, light absorption slurry, lubricant and antioxidant according to parts by weight for standby;
s2, pre-drying polycarbonate at the temperature of 95 ℃ for 2 hours, adding the pre-dried polycarbonate, polyamide, thermoplastic polyester elastomer, light-absorbing slurry, lubricant and antioxidant into a mixing mill together, controlling the stirring rotation speed to be 700r/min, mixing at the temperature of 195 ℃, stirring and mixing for 20 minutes, adding the mixture into a double-screw extruder, and extruding and granulating at the temperature of 150 ℃ to obtain the modified polycarbonate light-absorbing transparent plastic for laser welding.
Example 2
The application provides a modified polycarbonate light-absorbing transparent plastic for laser welding, which adopts the following technical scheme:
the modified polycarbonate light-absorbing transparent plastic for laser welding comprises the following raw materials in parts by weight: 75 parts of polycarbonate, 22 parts of polyamide, 6 parts of thermoplastic polyester elastomer, 2.5 parts of light absorbing slurry, 0.6 part of lubricant and 0.6 part of antioxidant;
wherein the light absorbing slurry is prepared by the following method:
a1, uniformly stirring and mixing the carbon nano tube, the nano barium titanate and the nano silver according to the mass ratio of 1:0.4:0.3 to obtain a light absorbent;
a2, mixing the light absorbing agent, N' N-dimethylformamide and polyvinylpyrrolidone according to a mass ratio of 1:1.8:0.2, controlling the ultrasonic power to be 520W, and dispersing for 1.8h to obtain light absorbing slurry;
the lubricant is zinc stearate;
the antioxidant is antioxidant 1076.
The application also provides a preparation method of the modified polycarbonate light-absorbing transparent plastic for laser welding, which specifically comprises the following preparation steps:
s1, weighing polycarbonate, polyamide, thermoplastic polyester elastomer, light absorption slurry, lubricant and antioxidant according to parts by weight for standby;
s2, pre-drying polycarbonate at the temperature of 100 ℃ for 4.5 hours, adding the pre-dried polycarbonate, polyamide, thermoplastic polyester elastomer, light absorption slurry, lubricant and antioxidant into a mixing roll, controlling the stirring rotation speed to be 800r/min, mixing at the temperature of 190 ℃, stirring and mixing for 15 minutes, adding the mixture into a double-screw extruder, and extruding and granulating at the temperature of 160 ℃ to obtain the modified polycarbonate light absorption transparent plastic for laser welding.
Example 3
The application provides a modified polycarbonate light-absorbing transparent plastic for laser welding, which adopts the following technical scheme:
the modified polycarbonate light-absorbing transparent plastic for laser welding comprises the following raw materials in parts by weight: 80 parts of polycarbonate, 24 parts of polyamide, 7 parts of thermoplastic polyester elastomer, 3.5 parts of light absorbing slurry, 0.7 part of lubricant and 0.7 part of antioxidant;
wherein the light absorbing slurry is prepared by the following method:
a1, uniformly stirring and mixing the carbon nano tube, the nano barium titanate and the nano silver according to the mass ratio of 1:0.5:0.2 to obtain a light absorbent;
a2, mixing a light absorbing agent, N' N-dimethylformamide and polyvinylpyrrolidone according to a mass ratio of 1:2:0.15, controlling the ultrasonic power to be 550W, and dispersing for 1.5h to prepare light absorbing slurry;
the lubricant is calcium stearate;
the antioxidant is antioxidant 168.
The application also provides a preparation method of the modified polycarbonate light-absorbing transparent plastic for laser welding, which specifically comprises the following preparation steps:
s1, weighing polycarbonate, polyamide, thermoplastic polyester elastomer, light absorption slurry, lubricant and antioxidant according to parts by weight for standby;
s2, pre-drying polycarbonate at 105 ℃ for 3.5 hours, adding the pre-dried polycarbonate, polyamide, thermoplastic polyester elastomer, light-absorbing slurry, lubricant and antioxidant into a mixing roll, controlling the stirring rotation speed to 850r/min, mixing at 185 ℃ for 20 minutes, adding the mixed materials into a double-screw extruder, and extruding and granulating at 170 ℃ to obtain the modified polycarbonate light-absorbing transparent plastic for laser welding.
Example 4
The application provides a modified polycarbonate light-absorbing transparent plastic for laser welding, which adopts the following technical scheme:
the modified polycarbonate light-absorbing transparent plastic for laser welding comprises the following raw materials in parts by weight: 85 parts of polycarbonate, 26 parts of polyamide, 8 parts of thermoplastic polyester elastomer, 4.5 parts of light absorbing slurry, 0.8 part of lubricant and 0.8 part of antioxidant;
wherein the light absorbing slurry is prepared by the following method:
a1, uniformly stirring and mixing the carbon nano tube, the nano barium titanate and the nano silver according to the mass ratio of 1:0.6:0.1 to obtain a light absorbent;
a2, mixing a light absorbing agent, N' N-dimethylformamide and polyvinylpyrrolidone according to a mass ratio of 1:2.2:0.1, controlling ultrasonic power to be 580W, and dispersing for 1.2h to obtain light absorbing slurry;
the lubricant is pentaerythritol stearate;
the antioxidant is antioxidant 1010.
The application also provides a preparation method of the modified polycarbonate light-absorbing transparent plastic for laser welding, which specifically comprises the following preparation steps:
s1, weighing polycarbonate, polyamide, thermoplastic polyester elastomer, light absorption slurry, lubricant and antioxidant according to parts by weight for standby;
s2, pre-drying polycarbonate at 110 ℃ for 2.5 hours, adding the pre-dried polycarbonate, polyamide, thermoplastic polyester elastomer, light-absorbing slurry, lubricant and antioxidant into a mixing roll, controlling the stirring rotation speed to 900r/min, mixing at 180 ℃, stirring and mixing for 25min, adding the mixture into a double-screw extruder, and extruding and granulating at 190 ℃ to obtain the modified polycarbonate light-absorbing transparent plastic for laser welding.
Example 5
The application provides a modified polycarbonate light-absorbing transparent plastic for laser welding, which adopts the following technical scheme:
the modified polycarbonate light-absorbing transparent plastic for laser welding comprises the following raw materials in parts by weight: 90 parts of polycarbonate, 30 parts of polyamide, 10 parts of thermoplastic polyester elastomer, 5 parts of light absorbing slurry, 1 part of lubricant and 1 part of antioxidant;
wherein the light absorbing slurry is prepared by the following method:
a1, uniformly stirring and mixing the carbon nano tube, the nano barium titanate and the nano silver according to the mass ratio of 1:0.6:0.3 to obtain a light absorbent;
a2, mixing a light absorbing agent, N' N-dimethylformamide and polyvinylpyrrolidone according to a mass ratio of 1:2.2:0.2, controlling the ultrasonic power to be 600W, and dispersing for 1h to obtain light absorbing slurry;
the lubricant is pentaerythritol stearate;
the antioxidant is antioxidant 1010.
The application also provides a preparation method of the modified polycarbonate light-absorbing transparent plastic for laser welding, which specifically comprises the following preparation steps:
s1, weighing polycarbonate, polyamide, thermoplastic polyester elastomer, light absorption slurry, lubricant and antioxidant according to parts by weight for standby;
s2, pre-drying polycarbonate at 115 ℃ for 2 hours, adding the pre-dried polycarbonate, polyamide, thermoplastic polyester elastomer, light-absorbing slurry, lubricant and antioxidant into a mixing roll, controlling the stirring rotation speed to be 1000r/min, mixing at 175 ℃, stirring and mixing for 18 minutes, adding the mixture into a double-screw extruder, and extruding and granulating at 200 ℃ to obtain the modified polycarbonate light-absorbing transparent plastic for laser welding.
Comparative example 1
The application provides a modified polycarbonate light-absorbing transparent plastic for laser welding, which adopts the following technical scheme:
the modified polycarbonate light-absorbing transparent plastic for laser welding comprises the following raw materials in parts by weight: 70 parts of polycarbonate, 23 parts of polyamide, 2 parts of light-absorbing slurry, 0.5 part of lubricant and 0.5 part of antioxidant;
wherein the light absorbing slurry is prepared by the following method:
a1, uniformly stirring and mixing the carbon nano tube, the nano barium titanate and the nano silver according to the mass ratio of 1:0.4:0.1 to obtain a light absorbent;
a2, mixing a light absorbing agent, N' N-dimethylformamide and polyvinylpyrrolidone according to a mass ratio of 1:1.8:0.1, controlling the ultrasonic power to be 500W, and dispersing for 2 hours to prepare light absorbing slurry;
the lubricant is pentaerythritol stearate;
the antioxidant is antioxidant 1010.
The application also provides a preparation method of the modified polycarbonate light-absorbing transparent plastic for laser welding, which specifically comprises the following preparation steps:
s1, weighing polycarbonate, polyamide, light absorption slurry, a lubricant and an antioxidant for standby according to parts by weight;
s2, pre-drying the polycarbonate at the temperature of 95 ℃ for 2 hours, adding the pre-dried polycarbonate, the polyamide light absorption slurry, the lubricant and the antioxidant into a mixing roll, controlling the stirring rotation speed to be 700r/min, mixing the mixture at the temperature of 195 ℃, stirring and mixing the mixture for 20 minutes, adding the mixture into a double-screw extruder, and extruding and granulating the mixture at the temperature of 150 ℃ to obtain the modified polycarbonate light absorption transparent plastic for laser welding.
Comparative example 2
The application provides a modified polycarbonate light-absorbing transparent plastic for laser welding, which adopts the following technical scheme:
the modified polycarbonate light-absorbing transparent plastic for laser welding comprises the following raw materials in parts by weight: 93 parts of polycarbonate, 2 parts of light absorption slurry, 0.5 part of lubricant and 0.5 part of antioxidant;
wherein the light absorbing slurry is prepared by the following method:
a1, uniformly stirring and mixing the carbon nano tube, the nano barium titanate and the nano silver according to the mass ratio of 1:0.4:0.1 to obtain a light absorbent;
a2, mixing a light absorbing agent, N' N-dimethylformamide and polyvinylpyrrolidone according to a mass ratio of 1:1.8:0.1, controlling the ultrasonic power to be 500W, and dispersing for 2 hours to prepare light absorbing slurry;
the lubricant is pentaerythritol stearate;
the antioxidant is antioxidant 1010.
The application also provides a preparation method of the modified polycarbonate light-absorbing transparent plastic for laser welding, which specifically comprises the following preparation steps:
s1, weighing polycarbonate, light absorption slurry, a lubricant and an antioxidant according to parts by weight for standby;
s2, pre-drying the polycarbonate at the temperature of 95 ℃ for 2 hours, adding the pre-dried polycarbonate, the light-absorbing slurry, the lubricant and the antioxidant into a mixing roll, controlling the stirring rotation speed to be 700r/min, mixing the mixture at the temperature of 195 ℃, stirring and mixing the mixture for 20 minutes, adding the mixture into a double-screw extruder, and extruding and granulating the mixture at the temperature of 150 ℃ to obtain the modified polycarbonate light-absorbing transparent plastic for laser welding.
Comparative example 3
The application provides a modified polycarbonate light-absorbing transparent plastic for laser welding, which adopts the following technical scheme:
the modified polycarbonate light-absorbing transparent plastic for laser welding comprises the following raw materials in parts by weight: 70 parts of polycarbonate, 18 parts of polyamide, 5 parts of thermoplastic polyester elastomer, 2 parts of light absorber, 0.5 part of lubricant and 0.5 part of antioxidant;
wherein the light absorber is prepared by uniformly stirring and mixing a carbon nano tube, nano barium titanate and nano silver according to the mass ratio of 1:0.4:0.1;
the lubricant is pentaerythritol stearate;
the antioxidant is antioxidant 1010.
The application also provides a preparation method of the modified polycarbonate light-absorbing transparent plastic for laser welding, which specifically comprises the following preparation steps:
s1, weighing polycarbonate, polyamide, thermoplastic polyester elastomer, light absorber, lubricant and antioxidant according to parts by weight for standby;
s2, pre-drying polycarbonate at the temperature of 95 ℃ for 2 hours, adding the pre-dried polycarbonate, the polyamide, the thermoplastic polyester elastomer, the light absorber, the lubricant and the antioxidant into a mixing mill, controlling the stirring rotation speed to be 700r/min, controlling the mixing temperature to be 195 ℃, stirring and mixing for 20 minutes, adding the mixture into a double-screw extruder, and extruding and granulating at the temperature of 150 ℃ to obtain the modified polycarbonate light-absorbing transparent plastic for laser welding.
Comparative example 4
The application provides a modified polycarbonate light-absorbing transparent plastic for laser welding, which adopts the following technical scheme:
the modified polycarbonate light-absorbing transparent plastic for laser welding comprises the following raw materials in parts by weight: 70 parts of polycarbonate, 18 parts of polyamide, 5 parts of thermoplastic polyester elastomer, 0.7 part of light absorber, 0.5 part of lubricant and 0.5 part of antioxidant;
wherein the light absorber is prepared by uniformly stirring and mixing a carbon nano tube, nano barium titanate and nano silver according to the mass ratio of 1:0.4:0.1;
a2, mixing a light absorbing agent, N' N-dimethylformamide and polyvinylpyrrolidone according to a mass ratio of 1:1.8:0.1, controlling the ultrasonic power to be 500W, and dispersing for 2 hours to prepare light absorbing slurry;
the lubricant is pentaerythritol stearate;
the antioxidant is antioxidant 1010.
The application also provides a preparation method of the modified polycarbonate light-absorbing transparent plastic for laser welding, which specifically comprises the following preparation steps:
s1, weighing polycarbonate, polyamide, thermoplastic polyester elastomer, light absorber, lubricant and antioxidant according to parts by weight for standby;
s2, pre-drying polycarbonate at the temperature of 95 ℃ for 2 hours, adding the pre-dried polycarbonate, the polyamide, the thermoplastic polyester elastomer, the light absorber, the lubricant and the antioxidant into a mixing mill, controlling the stirring rotation speed to be 700r/min, controlling the mixing temperature to be 195 ℃, stirring and mixing for 20 minutes, adding the mixture into a double-screw extruder, and extruding and granulating at the temperature of 150 ℃ to obtain the modified polycarbonate light-absorbing transparent plastic for laser welding.
Comparative example 5
The application provides a modified polycarbonate light-absorbing transparent plastic for laser welding, which adopts the following technical scheme:
the modified polycarbonate light-absorbing transparent plastic for laser welding comprises the following raw materials in parts by weight: 70 parts of polycarbonate, 18 parts of polyamide, 5 parts of thermoplastic polyester elastomer, 2 parts of light absorbing slurry, 0.5 part of lubricant and 0.5 part of antioxidant;
wherein the light absorbing slurry is prepared by the following method:
a1, uniformly stirring and mixing the carbon nano tube and nano barium titanate according to the mass ratio of 1:0.5 to obtain a light absorbent;
a2, mixing a light absorbing agent, N' N-dimethylformamide and polyvinylpyrrolidone according to a mass ratio of 1:1.8:0.1, controlling the ultrasonic power to be 500W, and dispersing for 2 hours to prepare light absorbing slurry;
the lubricant is pentaerythritol stearate;
the antioxidant is antioxidant 1010.
The application also provides a preparation method of the modified polycarbonate light-absorbing transparent plastic for laser welding, which specifically comprises the following preparation steps:
s1, weighing polycarbonate, polyamide, thermoplastic polyester elastomer, light absorption slurry, lubricant and antioxidant according to parts by weight for standby;
s2, pre-drying polycarbonate at the temperature of 95 ℃ for 2 hours, adding the pre-dried polycarbonate, polyamide, thermoplastic polyester elastomer, light-absorbing slurry, lubricant and antioxidant into a mixing mill together, controlling the stirring rotation speed to be 700r/min, mixing at the temperature of 195 ℃, stirring and mixing for 20 minutes, adding the mixture into a double-screw extruder, and extruding and granulating at the temperature of 150 ℃ to obtain the modified polycarbonate light-absorbing transparent plastic for laser welding.
Performance testing
The modified polycarbonate light-absorbing transparent plastic particles for laser welding prepared in examples 1 to 5 and comparative examples 1 to 5 of the present application were injection molded into 100mm x 2mm highlight plates under the same injection molding process conditions, and near infrared projection and reflection data were collected in a spectrophotometer 960nm, with absorptivity=100% -transmissivity-reflectivity.
The injection-molded highlight plate and the transparent PMMA plate were placed alternately together, and irradiated with a semiconductor laser (960 nm) having a beam diameter of 2 mm. The laser intensity was controlled to 40W, the welding speed was controlled to 40mm/s, and the surface state of the welded template was compared. The laser welded test pieces were sawed into strips of 10mm width, the tensile shear strength was measured by a tensile tester, the weld strength was calculated from the tensile shear strength, and the weld strength was tensile strength/(width of weld seam. Length of weld seam), and the results are shown in table 1 below:
as can be seen from the data shown in table 1: the modified polycarbonate light-absorbing transparent plastic for laser welding, which is prepared in the embodiments 1-5, has the advantages of high laser welding efficiency, high welding quality, high light-absorbing efficiency and excellent comprehensive performance.
From examples and comparative examples 1-2, it is evident that the combination of the addition of polyamide and thermoplastic polyester elastomer in a polycarbonate system can significantly improve the overall properties of the welded plastic.
As can be seen from example 1 and comparative examples 3 to 4, the conductive agent is added to the polycarbonate system after being prepared into the conductive paste, which is helpful for realizing uniform and stable dispersion of the light absorber in the polycarbonate system, preventing precipitation or aggregation of the light absorber component, further ensuring that the light absorber is fully utilized, and further improving the laser welding efficiency.
As can be seen from example 1 and comparative example 5, the light absorption efficiency can be remarkably improved and the welding process can be promoted by selecting the carbon nanotubes, nano barium titanate and nano silver as the light absorbent.
The present embodiment is only for explanation of the present application and is not to be construed as limiting the present application, and modifications to the present embodiment, which may not creatively contribute to the present application as required by those skilled in the art after reading the present specification, are all protected by patent laws within the scope of claims of the present application.
Claims (10)
1. The modified polycarbonate light-absorbing transparent plastic for laser welding is characterized by comprising the following raw materials in parts by weight: 70-90 parts of polycarbonate, 18-30 parts of polyamide, 5-10 parts of thermoplastic polyester elastomer, 2-5 parts of light absorption slurry, 0.5-1 part of lubricant and 0.5-1 part of antioxidant.
2. The modified polycarbonate light-absorbing transparent plastic for laser welding according to claim 1, which is characterized by comprising the following raw materials in parts by weight: 75-85 parts of polycarbonate, 22-26 parts of polyamide, 6-8 parts of thermoplastic polyester elastomer, 2.5-4.5 parts of light absorbing slurry, 0.6-0.8 part of lubricant and 0.6-0.8 part of antioxidant.
3. The modified polycarbonate light-absorbing transparent plastic for laser welding according to claim 1, which is characterized by comprising the following raw materials in parts by weight: 80 parts of polycarbonate, 24 parts of polyamide, 7 parts of thermoplastic polyester elastomer, 3.5 parts of light absorbing slurry, 0.7 part of lubricant and 0.7 part of antioxidant.
4. The modified polycarbonate light-absorbing transparent plastic for laser welding according to claim 1, wherein the light-absorbing slurry is obtained by mixing a light-absorbing agent, N' N-dimethylformamide and polyvinylpyrrolidone and then performing ultrasonic dispersion.
5. The modified polycarbonate light-absorbing transparent plastic for laser welding according to claim 4, wherein the light-absorbing agent comprises carbon nanotubes, nano barium titanate and nano silver in a mass ratio of 1:0.4-0.6:0.1-0.3.
6. The modified polycarbonate light-absorbing transparent plastic for laser welding according to claim 4, wherein the mass ratio of the light absorber, N' N-dimethylformamide and polyvinylpyrrolidone is 1:1.8-2.2:0.1-0.2.
7. The modified polycarbonate light-absorbing transparent plastic for laser welding according to claim 4, wherein the ultrasonic power is 500-600W and the ultrasonic time is 1-2h.
8. The modified polycarbonate light-absorbing transparent plastic for laser welding according to claim 1, wherein the lubricant is at least one of pentaerythritol stearate, zinc stearate, and calcium stearate.
9. The modified polycarbonate light-absorbing transparent plastic for laser welding according to claim 1, wherein the antioxidant is at least one of antioxidant 1010, antioxidant 1076 and antioxidant 168.
10. A method for preparing a modified polycarbonate light-absorbing transparent plastic for laser welding as claimed in any one of claims 1 to 9, which comprises the following preparation steps:
s1, weighing polycarbonate, polyamide, thermoplastic polyester elastomer, light absorption slurry, lubricant and antioxidant according to parts by weight for standby;
s2, pre-drying the polycarbonate, adding the pre-dried polycarbonate, the polyamide, the thermoplastic polyester elastomer, the light absorption slurry, the lubricant and the antioxidant into a mixing mill, stirring, mixing, extruding and granulating to obtain the modified polycarbonate light absorption transparent plastic for laser welding.
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| CN101469124A (en) * | 2007-12-25 | 2009-07-01 | 帝人化成株式会社 | Polycarbonate resin composition |
| JP2011127062A (en) * | 2009-12-21 | 2011-06-30 | Toray Ind Inc | Thermoplastic resin composition |
| CN104927333A (en) * | 2015-07-15 | 2015-09-23 | 上海锦湖日丽塑料有限公司 | Polycarbonate composition suitable for laser welding and preparation method thereof |
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| WO2023067499A1 (en) * | 2021-10-18 | 2023-04-27 | Shpp Global Technologies B.V. | Laser transparent low warpage glass filled pbt compositions for laser welding |
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| CN101469124A (en) * | 2007-12-25 | 2009-07-01 | 帝人化成株式会社 | Polycarbonate resin composition |
| JP2009155377A (en) * | 2007-12-25 | 2009-07-16 | Teijin Chem Ltd | Polycarbonate resin composition |
| JP2011127062A (en) * | 2009-12-21 | 2011-06-30 | Toray Ind Inc | Thermoplastic resin composition |
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| WO2023067499A1 (en) * | 2021-10-18 | 2023-04-27 | Shpp Global Technologies B.V. | Laser transparent low warpage glass filled pbt compositions for laser welding |
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