CN115109341B - Polypropylene modified material capable of being welded by laser as well as preparation method and application thereof - Google Patents
Polypropylene modified material capable of being welded by laser as well as preparation method and application thereof Download PDFInfo
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- CN115109341B CN115109341B CN202210786816.6A CN202210786816A CN115109341B CN 115109341 B CN115109341 B CN 115109341B CN 202210786816 A CN202210786816 A CN 202210786816A CN 115109341 B CN115109341 B CN 115109341B
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- -1 Polypropylene Polymers 0.000 title claims abstract description 133
- 239000004743 Polypropylene Substances 0.000 title claims abstract description 129
- 229920001155 polypropylene Polymers 0.000 title claims abstract description 129
- 239000000463 material Substances 0.000 title claims abstract description 101
- 238000002360 preparation method Methods 0.000 title claims abstract description 37
- VTYYLEPIZMXCLO-UHFFFAOYSA-L Calcium carbonate Chemical compound [Ca+2].[O-]C([O-])=O VTYYLEPIZMXCLO-UHFFFAOYSA-L 0.000 claims abstract description 50
- 230000031700 light absorption Effects 0.000 claims abstract description 35
- 239000002994 raw material Substances 0.000 claims abstract description 28
- 230000005540 biological transmission Effects 0.000 claims abstract description 26
- 239000003963 antioxidant agent Substances 0.000 claims abstract description 25
- 229910000019 calcium carbonate Inorganic materials 0.000 claims abstract description 25
- 239000002667 nucleating agent Substances 0.000 claims abstract description 25
- 230000003078 antioxidant effect Effects 0.000 claims abstract description 23
- 239000000314 lubricant Substances 0.000 claims abstract description 23
- 239000006096 absorbing agent Substances 0.000 claims abstract description 16
- 229920005604 random copolymer Polymers 0.000 claims abstract description 8
- 239000005083 Zinc sulfide Substances 0.000 claims abstract description 7
- 238000004519 manufacturing process Methods 0.000 claims abstract description 7
- 229910052984 zinc sulfide Inorganic materials 0.000 claims abstract description 7
- DRDVZXDWVBGGMH-UHFFFAOYSA-N zinc;sulfide Chemical compound [S-2].[Zn+2] DRDVZXDWVBGGMH-UHFFFAOYSA-N 0.000 claims abstract description 7
- 239000011347 resin Substances 0.000 claims description 40
- 229920005989 resin Polymers 0.000 claims description 40
- 238000003756 stirring Methods 0.000 claims description 36
- 238000000034 method Methods 0.000 claims description 32
- 238000001125 extrusion Methods 0.000 claims description 19
- 239000002131 composite material Substances 0.000 claims description 18
- 238000002156 mixing Methods 0.000 claims description 18
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N Titan oxide Chemical group O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims description 11
- 239000000155 melt Substances 0.000 claims description 7
- 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 5
- 229920005629 polypropylene homopolymer Polymers 0.000 claims description 5
- 239000000600 sorbitol Substances 0.000 claims description 5
- 239000004408 titanium dioxide Substances 0.000 claims description 4
- UAUDZVJPLUQNMU-UHFFFAOYSA-N Erucasaeureamid Natural products CCCCCCCCC=CCCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-UHFFFAOYSA-N 0.000 claims description 3
- 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
- XBDQKXXYIPTUBI-UHFFFAOYSA-M Propionate Chemical compound CCC([O-])=O XBDQKXXYIPTUBI-UHFFFAOYSA-M 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
- UAUDZVJPLUQNMU-KTKRTIGZSA-N erucamide Chemical compound CCCCCCCC\C=C/CCCCCCCCCCCC(N)=O UAUDZVJPLUQNMU-KTKRTIGZSA-N 0.000 claims description 3
- NFHFRUOZVGFOOS-UHFFFAOYSA-N palladium;triphenylphosphane Chemical compound [Pd].C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1.C1=CC=CC=C1P(C=1C=CC=CC=1)C1=CC=CC=C1 NFHFRUOZVGFOOS-UHFFFAOYSA-N 0.000 claims description 3
- WXZMFSXDPGVJKK-UHFFFAOYSA-N pentaerythritol Chemical compound OCC(CO)(CO)CO WXZMFSXDPGVJKK-UHFFFAOYSA-N 0.000 claims description 3
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 claims description 3
- 229920002554 vinyl polymer Polymers 0.000 claims description 3
- 229940037312 stearamide Drugs 0.000 claims description 2
- 238000005469 granulation Methods 0.000 claims 3
- 230000003179 granulation Effects 0.000 claims 3
- 238000003466 welding Methods 0.000 abstract description 51
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract description 17
- 238000010521 absorption reaction Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 2
- 230000035515 penetration Effects 0.000 abstract description 2
- 238000012545 processing Methods 0.000 abstract description 2
- 229920005633 polypropylene homopolymer resin Polymers 0.000 abstract 2
- 239000001038 titanium pigment Substances 0.000 abstract 1
- 230000000052 comparative effect Effects 0.000 description 31
- 239000004033 plastic Substances 0.000 description 7
- 229920003023 plastic Polymers 0.000 description 7
- 235000010215 titanium dioxide Nutrition 0.000 description 6
- 238000012360 testing method Methods 0.000 description 5
- 238000002834 transmittance Methods 0.000 description 5
- 239000000843 powder Substances 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- FMZUHGYZWYNSOA-VVBFYGJXSA-N (1r)-1-[(4r,4ar,8as)-2,6-diphenyl-4,4a,8,8a-tetrahydro-[1,3]dioxino[5,4-d][1,3]dioxin-4-yl]ethane-1,2-diol Chemical compound C([C@@H]1OC(O[C@@H]([C@@H]1O1)[C@H](O)CO)C=2C=CC=CC=2)OC1C1=CC=CC=C1 FMZUHGYZWYNSOA-VVBFYGJXSA-N 0.000 description 2
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 235000013339 cereals Nutrition 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 229940087101 dibenzylidene sorbitol Drugs 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000011049 filling Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 229910052500 inorganic mineral Inorganic materials 0.000 description 2
- 239000011707 mineral Substances 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000002086 nanomaterial Substances 0.000 description 2
- 238000011056 performance test Methods 0.000 description 2
- HDUNAIVOFOKALD-RLCYQCIGSA-N (1s,2s)-1-[(4r)-2-(4-methylphenyl)-1,3-dioxolan-4-yl]-2-[(4s)-2-(4-methylphenyl)-1,3-dioxolan-4-yl]ethane-1,2-diol Chemical compound C1=CC(C)=CC=C1C1O[C@@H]([C@@H](O)[C@H](O)[C@H]2OC(OC2)C=2C=CC(C)=CC=2)CO1 HDUNAIVOFOKALD-RLCYQCIGSA-N 0.000 description 1
- 239000011358 absorbing material Substances 0.000 description 1
- 239000000853 adhesive Substances 0.000 description 1
- 238000004026 adhesive bonding Methods 0.000 description 1
- 230000001070 adhesive effect Effects 0.000 description 1
- 238000003915 air pollution Methods 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 125000000649 benzylidene group Chemical class [H]C(=[*])C1=C([H])C([H])=C([H])C([H])=C1[H] 0.000 description 1
- 230000009172 bursting Effects 0.000 description 1
- 239000006229 carbon black Substances 0.000 description 1
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- 239000003795 chemical substances by application Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 238000002425 crystallisation Methods 0.000 description 1
- 230000008025 crystallization Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000004880 explosion Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000010409 ironing Methods 0.000 description 1
- 238000010999 medical injection Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 238000004023 plastic welding Methods 0.000 description 1
- 239000002861 polymer material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000007788 roughening Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 230000035882 stress Effects 0.000 description 1
- 229920001935 styrene-ethylene-butadiene-styrene Polymers 0.000 description 1
- 230000008646 thermal stress Effects 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 239000004416 thermosoftening plastic Substances 0.000 description 1
- 239000012745 toughening agent Substances 0.000 description 1
- 238000009966 trimming Methods 0.000 description 1
Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
-
- 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
- C08K3/32—Phosphorus-containing compounds
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
- C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
- C08L23/10—Homopolymers or copolymers of propene
- C08L23/12—Polypropene
-
- 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
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- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2237—Oxides; Hydroxides of metals of titanium
- C08K2003/2241—Titanium dioxide
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/20—Oxides; Hydroxides
- C08K3/22—Oxides; Hydroxides of metals
- C08K2003/2248—Oxides; Hydroxides of metals of copper
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
- C08K3/24—Acids; Salts thereof
- C08K3/26—Carbonates; Bicarbonates
- C08K2003/265—Calcium, strontium or barium carbonate
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K3/00—Use of inorganic substances as compounding ingredients
- C08K3/30—Sulfur-, selenium- or tellurium-containing compounds
- C08K2003/3009—Sulfides
- C08K2003/3036—Sulfides of zinc
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C08K3/32—Phosphorus-containing compounds
- C08K2003/321—Phosphates
- C08K2003/328—Phosphates of heavy metals
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
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- C08L2201/00—Properties
- C08L2201/10—Transparent films; Clear coatings; Transparent materials
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- C—CHEMISTRY; METALLURGY
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Abstract
The invention discloses a polypropylene modified material capable of being welded by laser, and a preparation method and application thereof, wherein the polypropylene modified material comprises a light absorption component prepared from homo-polypropylene resin, titanium pigment, superfine calcium carbonate, a light absorber, an antioxidant and a lubricant as raw materials, and a light transmission component prepared from the raw materials of homo-polypropylene resin, random copolymer polypropylene, zinc sulfide, superfine calcium carbonate, a nucleating agent, the antioxidant and the lubricant; the shell of the water purifier filter bottle with high laser penetration capability is made of the light-transmitting component, the upper cover of the water purifier filter bottle with high laser absorption efficiency is made of the light-absorbing component, the comprehensive mechanical property is good, the shell and the upper cover can be directly welded through laser welding, the welding interface strength is high, additional processing is not needed, the reject ratio and the production period are reduced, and the application of the laser welding technology on the water purifier filter bottle is widened.
Description
Technical Field
The invention belongs to the field of high polymer materials, and particularly relates to a polypropylene modified material capable of being welded by laser, and a preparation method and application thereof.
Background
The polypropylene material is widely applied to the fields of automobile industry, household appliance industry, medical appliances, electronic appliances and the like because of the advantages of low price, chemical corrosion resistance, high strength, easy recycling and the like.
At present, bonding modes among polypropylene material components such as a cab frame, a filter frame, a mop bucket, a water purifier filter element, a medical tube, a medical injection molding device, a sensor shell, an electronic component package and the like mainly comprise ultrasonic welding, vibration welding, hot plate welding and glue welding. These conventional methods have many disadvantages such as hot plate welding, the plastic parts are easily adhered to the heating source and cause air pollution; the glue welding method needs to be subjected to the working procedures of surface roughening, gluing, bonding, curing, electric iron ironing, trimming and the like, and is manually operated, so that the labor intensity is high, the working procedures are multiple, the production efficiency is low, the quality is difficult to ensure, and the volatile components of the adhesive pollute the environment and influence the health of operators.
Laser welding is a highly efficient and precise welding method that uses a laser beam of high energy density as a heat source. Compared with the traditional plastic welding process, the method has the advantages that the laser welding and the workpiece to be welded do not generate physical contact, do not generate chemical reaction, and can be operated in industrial environment; the shape and the size of the laser beam can be regulated and controlled, so that the sizes of a heat affected zone and a welding zone are controlled, the degree of freedom is high, and the flexibility is good; the welding speed is high, the weld joint gap strength is high, no flash and residues are generated, and the good appearance of a welding area is ensured; the precision is firm, the air is airtight, no water leakage occurs, and the thermal stress and the vibration stress are greatly reduced.
Laser welding is increasingly used as a secondary process for thermoplastics. Good weld strength should be the property that the laser welding material should first take into account. Some studies have been made in the prior art on laser welding materials, such as: chinese patent CN 110862642a discloses a modified polypropylene material with high rigidity and super toughness and capable of being welded by laser and a preparation method thereof, wherein the polypropylene is copolymerized polypropylene, a toughening agent SEBS is added to improve the toughness of the polypropylene, and whiskers are added to improve the strength of the polypropylene, so that the modified polypropylene material with high rigidity and high toughness is prepared. However, the modified polypropylene material prepared by the substances and the method only improves the rigidity and toughness of polypropylene, and does not solve the problem of low strength of a welding interface.
The filter bottle of the water purifier is required to be white, but the white general laser cannot penetrate, the welding is not superior or the welding strength is insufficient, so the polypropylene material welded by the laser for the filter bottle of the water purifier is almost blank, and in order to solve the problem of low strength of a welding interface, a feasible solution strategy is possible by increasing the transmittance of the laser penetrating layer to laser and the absorption of the laser absorbing layer to laser.
Disclosure of Invention
Based on the above, it is an object of the present invention to provide a polypropylene modified material capable of laser welding, which can solve the defect of low welding interface strength.
The specific technical scheme for realizing the aim of the invention comprises the following steps:
a polypropylene modified material capable of being welded by laser comprises a light absorption component and a light transmission component; the light absorption component is prepared from the following raw materials in parts by weight:
the light-transmitting component is prepared from the following raw materials in parts by weight:
wherein the polypropylene resin A is homo-polypropylene; the polypropylene resin B is random copolymer polypropylene; the toner A is zinc sulfide, and the toner B is titanium white.
In some embodiments, the light absorbing component is prepared from the following raw materials in parts by weight:
the light-transmitting component is prepared from the following raw materials in parts by weight:
in some embodiments, the melt index of the homo-polypropylene is 1.0g/10 min-6.0 g/10min at 230 ℃ under 2.16kg, and the melt index of the random copolymer polypropylene is 5.0g/10 min-30 g/10min at 230 ℃ under 2.16 kg.
In some of these embodiments, the nucleating agent is a sorbitol-based transparent nucleating agent, such as dibenzylidene sorbitol (DBS), bis (P-methyl benzylidene) sorbitol (P-M-DBS), or bis (P-chloro-substituted benzylidene) sorbitol (P-Cl-DBS).
In some of these embodiments, the light absorber is Cu 3 (PO 4 ) 2 Cu(OH) 2 。
In some of these embodiments, the superfine calcium carbonate has a mesh size of 8000 mesh to 10000 mesh.
In one embodiment, the antioxidant is one or more of pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], tris [2, 4-di-tert-butylphenyl ] phosphite and n-stearyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate; and/or the lubricant is one or more of calcium stearate, vinyl distearamide and erucamide.
The invention also provides a preparation method of the polypropylene modified material capable of being welded by laser.
The specific technical scheme for realizing the aim of the invention comprises the following steps:
a preparation method of a polypropylene modified material capable of being welded by laser comprises a method for preparing a light absorption component and a method for preparing a light transmission component; the method for preparing the light absorbing component comprises the following steps:
(1) Adding the polypropylene resin A and the superfine calcium carbonate into a kneader for stirring, and adding the toner B, the light absorber, the antioxidant and the lubricant for mixing while stirring;
(2) Adding the mixed material obtained in the step (1) into a double-screw extruder through a feeder, carrying out melt extrusion and granulating to obtain the modified polypropylene composite material; the process parameters are as follows: the temperature of the first area is 190-220 ℃, the temperature of the second area is 220-235 ℃, the temperature of the third area is 225-240 ℃, the temperature of the fourth area is 225-240 ℃, the temperature of the fifth area is 225-240 ℃, the temperature of the sixth area is 225-240 ℃, the temperature of the seventh area is 225-240 ℃, the temperature of the eighth area is 225-240 ℃, the temperature of the machine head is 225-240 ℃, and the feeding rotating speed is 15-80 r/min; the vacuum degree is-0.01 MPa to-0.10 MPa;
the method for preparing the light-transmitting component comprises the following steps:
(1) Adding the polypropylene resin A, the polypropylene resin B and the superfine calcium carbonate into a kneader for stirring, and adding the toner A, the nucleating agent, the antioxidant and the lubricant while stirring for mixing;
(2) Adding the mixed material obtained in the step (1) into a double-screw extruder through a feeder, carrying out melt extrusion and granulating to obtain the modified polypropylene composite material; the process parameters are as follows: the temperature of the first area is 190-220 ℃, the temperature of the second area is 220-235 ℃, the temperature of the third area is 225-240 ℃, the temperature of the fourth area is 225-240 ℃, the temperature of the fifth area is 225-240 ℃, the temperature of the sixth area is 225-240 ℃, the temperature of the seventh area is 225-240 ℃, the temperature of the eighth area is 225-240 ℃, the temperature of the machine head is 225-240 ℃, and the feeding rotating speed is 15-80 r/min; the vacuum degree is-0.01 MPa to-0.10 MPa.
The invention also provides application of the polypropylene modified material capable of being welded by laser in preparation of filter bottles of purifiers.
The polypropylene modified material capable of being welded by laser comprises a light absorption component and a light transmission component. The light absorption component is prepared by taking polypropylene resin A as a main carrier, ultrafine calcium carbonate as mineral filling and matching titanium dioxide with a light absorption agent, and can be used for preparing an upper cover of a filter flask of a water purifier. The polypropylene resin A in the light absorption component is low-melt-index homopolymerized polypropylene, has certain rigidity and toughness, meets the requirement of a water purifier filter flask on materials in a water hammer explosion test, and the titanium white powder and the light absorber (food-grade nano material powder has no absorption to visible light, effectively absorbs near infrared and has the advantages of low addition amount, high absorption efficiency, little influence on the color of a product and the like) are used for adjusting the absorption of the light absorption component to light waves in the near infrared band. The light-transmitting component is prepared by taking polypropylene resin A as a main carrier and ultrafine calcium carbonate as mineral filling and matching nucleating agent, polypropylene resin B and zinc sulfide, and can be used for preparing a filter flask shell of a water purifier. In the light-transmitting component, the polypropylene resin A is low-melting-point homopolymerized polypropylene, the nucleating agent (sorbitol transparent nucleating agent) has high nucleating efficiency, small grains are formed by the polypropylene material, and the random copolymerized polypropylene (low crystallinity and high light transmittance due to poor molecular chain regularity) reduces the crystallinity of the homopolymerized polypropylene, increases the light transmittance of the material, and in addition, zinc sulfide can meet the requirement of a water purifier filter element shell on the color of the material and increases the light transmittance of the material to a near infrared light wave.
When the welding surface of the upper cover plastic part made of the light absorption component and the outer shell plastic part made of the light transmission component are close together, laser beams penetrate through the outer shell plastic part (upper layer), laser energy of the upper cover plastic part (lower layer) is absorbed, the temperature of the material is increased, and plastic on the contact surface of the upper layer and the lower layer is melted, so that welding is completed.
Compared with the prior art, the invention has the following beneficial effects:
the polypropylene modified material capable of being welded by laser comprises a light absorption component and a light transmission component, wherein the light transmission component is matched with random copolymer polypropylene and homopolymerized polypropylene, so that the transparency of the component is improved, a nucleating agent is added to reduce the crystallization property of the homopolymerized polypropylene, the transparency of the component is further improved, zinc sulfide with strong light transmission is adopted as toner, and under the conception, the prepared light transmission component has excellent light transmission in a near infrared band of 900-1100 nm, and the requirement of part welding is met; the light-absorbing component has strong light-absorbing property to near infrared band by using titanium dioxide as toner (the efficiency is far higher than that of conventional toner such as carbon black) and food-grade nano-material powder as light absorber. The shell of the water purifier filter bottle with high laser penetration capability is made of the light-transmitting component, the upper cover of the water purifier filter bottle with high laser absorption efficiency is made of the light-absorbing component, the comprehensive mechanical property is good, the shell and the upper cover can be directly welded through laser welding, the welding interface strength is high, additional processing is not needed, the reject ratio and the production period are reduced, and the application of the laser welding technology on the water purifier filter bottle is widened.
Drawings
FIG. 1 is a flow chart of the process for preparing the polypropylene modified material capable of being welded by laser.
Detailed Description
In order that the invention may be understood more fully, the invention will be described with reference to the accompanying drawings. This invention may be embodied in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and/or" as used herein includes any and all combinations of one or more of the associated listed items.
In the examples and comparative examples of the present invention, the raw materials used were as follows:
polypropylene resin a: homo polypropylene 1102K selected from chinese petrochemical company, inc; the melt index is 3.7g/10min (230 ℃,2.16 kg);
polypropylene resin B: random copolymer polypropylene 420MO selected from the group consisting of medium sea shell petrochemical company, inc; the melt index is 13g/10min (230 ℃,2.16 kg);
nucleating agent: sorbitol transparent nucleating agent, model NX8000, selected from the group consisting of Milliken;
toner a: zinc sulfide selected from shahalibut;
toner B: titanium dioxide, selected from dupont, usa;
superfine calcium carbonate: 30000 mesh, new plastic limited in su zhou market;
light absorber: cu (Cu) 3 (PO 4 ) 2 Cu(OH) 2 Selected from merck, germany;
an antioxidant: pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ] selected from the group consisting of holy chemical company, ltd; tris [2, 4-di-t-butylphenyl ] phosphite selected from the group consisting of san Laikete chemical Co., ltd; the antioxidants used in the following examples were a mixture of the two antioxidants described above in a weight ratio of 1:2.
and (3) a lubricant: calcium stearate (used in example 1) selected from the group consisting of hanweixin materials science, inc; vinyl bis-stearamide (used in example 2 and comparative examples 1 to 5) selected from the group consisting of Hawyoshin materials science and technology Co., ltd; erucamide (used in example 3) selected from the company CRODA (cereal da) oleochemical.
The present invention will be described in detail with reference to specific examples and comparative examples.
Example 1 Polypropylene modified Material capable of laser welding and preparation method thereof
The polypropylene modified material capable of being welded by laser comprises a light absorption component and a light transmission component; the light absorption component is prepared from the following raw materials in parts by weight:
the light-transmitting component is prepared from the following raw materials in parts by weight:
the preparation method of the polypropylene modified material capable of being welded by laser comprises the steps of preparing a light absorption component and preparing a light transmission material;
the method for preparing the light absorbing component comprises the following steps:
(1) Adding the polypropylene resin A and the superfine calcium carbonate into a kneader for stirring, and adding the toner B, the light absorber, the antioxidant and the lubricant for mixing while stirring;
(2) Adding the mixed material obtained in the step (1) into a double-screw extruder through a feeder, carrying out melt extrusion and granulating to obtain the modified polypropylene composite material; the process parameters are as follows: the temperature of the first area is 190 ℃, the temperature of the second area is 220 ℃, the temperature of the third area is 225 ℃, the temperature of the fourth area is 225 ℃, the temperature of the fifth area is 225 ℃, the temperature of the sixth area is 225 ℃, the temperature of the seventh area is 225 ℃, the temperature of the eighth area is 225 ℃, the temperature of the machine head is 225 ℃, and the feeding rotating speed is 15r/min; vacuum degree is-0.01 MPa;
the method for preparing the light-transmitting component comprises the following steps:
(1) Adding the polypropylene resin A, the polypropylene resin B and the superfine calcium carbonate into a kneader for stirring, and adding the toner A, the nucleating agent, the antioxidant and the lubricant while stirring for mixing;
(2) Adding the mixed material obtained in the step (1) into a double-screw extruder through a feeder, carrying out melt extrusion and granulating to obtain the modified polypropylene composite material; the process parameters are as follows: the temperature of the first area is 190 ℃, the temperature of the second area is 220 ℃, the temperature of the third area is 225 ℃, the temperature of the fourth area is 225 ℃, the temperature of the fifth area is 225 ℃, the temperature of the sixth area is 225 ℃, the temperature of the seventh area is 225 ℃, the temperature of the eighth area is 225 ℃, the temperature of the machine head is 225 ℃, and the feeding rotating speed is 15r/min; the vacuum degree is-0.01 MPa.
Example 2 Polypropylene modified Material capable of laser welding and preparation method thereof
The polypropylene modified material capable of being welded by laser comprises a light absorption component and a light transmission component; the light absorption component is prepared from the following raw materials in parts by weight:
the light-transmitting component is prepared from the following raw materials in parts by weight:
the preparation method of the polypropylene modified material capable of being welded by laser comprises the steps of preparing a light absorption component and preparing a light transmission material;
the preparation of the light absorbing component comprises the following steps:
(1) Adding the polypropylene resin A and the superfine calcium carbonate into a kneader for stirring, and adding the toner B, the light absorber, the antioxidant and the lubricant for mixing while stirring;
(2) Adding the mixed material obtained in the step (1) into a double-screw extruder through a feeder, carrying out melt extrusion and granulating to obtain the modified polypropylene composite material; the process parameters are as follows: the temperature of the first area is 220 ℃, the temperature of the second area is 235 ℃, the temperature of the third area is 240 ℃, the temperature of the fourth area is 240 ℃, the temperature of the fifth area is 240 ℃, the temperature of the sixth area is 240 ℃, the temperature of the seventh area is 240 ℃, the temperature of the eighth area is 240 ℃, the temperature of the machine head is 240 ℃, and the feeding rotating speed is 80r/min; vacuum degree is-0.10 MPa;
the preparation of the light-transmitting component comprises the following steps:
(1) Adding the polypropylene resin A, the polypropylene resin B and the superfine calcium carbonate into a kneader for stirring, and adding the toner A, the nucleating agent, the antioxidant and the lubricant while stirring for mixing;
(2) Adding the mixed material obtained in the step (1) into a double-screw extruder through a feeder, carrying out melt extrusion and granulating to obtain the modified polypropylene composite material; the process parameters are as follows: the temperature of the first area is 220 ℃, the temperature of the second area is 235 ℃, the temperature of the third area is 240 ℃, the temperature of the fourth area is 240 ℃, the temperature of the fifth area is 240 ℃, the temperature of the sixth area is 240 ℃, the temperature of the seventh area is 240 ℃, the temperature of the eighth area is 240 ℃, the temperature of the machine head is 240 ℃, and the feeding rotating speed is 80r/min; the vacuum degree is-0.10 MPa.
Example 3 Polypropylene modified Material capable of laser welding and preparation method thereof
The polypropylene modified material capable of being welded by laser comprises a light absorption component and a light transmission component; the light absorption component is prepared from the following raw materials in parts by weight:
the light-transmitting component is prepared from the following raw materials in parts by weight:
the preparation method of the polypropylene modified material capable of being welded by laser comprises the steps of preparing a light absorption component and preparing a light transmission material;
the preparation of the light absorbing component comprises the following steps:
(1) Adding the polypropylene resin A and the superfine calcium carbonate into a kneader for stirring, and adding the toner B, the light absorber, the antioxidant and the lubricant for mixing while stirring;
(2) Adding the mixed material obtained in the step (1) into a double-screw extruder through a feeder, carrying out melt extrusion and granulating to obtain the modified polypropylene composite material; the process parameters are as follows: the temperature of the first area is 190 ℃, the temperature of the second area is 220 ℃, the temperature of the third area is 225 ℃, the temperature of the fourth area is 225 ℃, the temperature of the fifth area is 225 ℃, the temperature of the sixth area is 225 ℃, the temperature of the seventh area is 225 ℃, the temperature of the eighth area is 225 ℃, the temperature of the machine head is 225 ℃, and the feeding rotating speed is 15r/min; vacuum degree is-0.01 MPa;
the preparation of the light-transmitting component comprises the following steps:
(1) Adding the polypropylene resin A, the polypropylene resin B and the superfine calcium carbonate into a kneader for stirring, and adding the toner A, the nucleating agent, the antioxidant and the lubricant while stirring for mixing;
(2) Adding the mixed material obtained in the step (1) into a double-screw extruder through a feeder, carrying out melt extrusion and granulating to obtain the modified polypropylene composite material; the process parameters are as follows: the temperature of the first area is 220 ℃, the temperature of the second area is 235 ℃, the temperature of the third area is 240 ℃, the temperature of the fourth area is 240 ℃, the temperature of the fifth area is 240 ℃, the temperature of the sixth area is 240 ℃, the temperature of the seventh area is 240 ℃, the temperature of the eighth area is 240 ℃, the temperature of the machine head is 240 ℃, and the feeding rotating speed is 80r/min; the vacuum degree is-0.10 MPa.
Comparative example 1 Polypropylene modified material and preparation method thereof
The polypropylene modified material of the comparative example comprises a light absorption component and a light transmission component; the light absorption component is prepared from the following raw materials in parts by weight:
the light-transmitting component is prepared from the following raw materials in parts by weight:
the preparation method of the polypropylene material of the comparative example comprises the steps of preparing a light absorption component and preparing a light transmission material;
the preparation of the light absorbing component comprises the following steps:
(1) Adding the polypropylene resin A and the superfine calcium carbonate into a kneader for stirring, and adding the toner B, the antioxidant and the lubricant while stirring for mixing;
(2) Adding the mixed material obtained in the step (1) into a double-screw extruder through a feeder, carrying out melt extrusion and granulating to obtain the modified polypropylene composite material; the process parameters are as follows: the temperature of the first area is 190 ℃, the temperature of the second area is 220 ℃, the temperature of the third area is 225 ℃, the temperature of the fourth area is 225 ℃, the temperature of the fifth area is 225 ℃, the temperature of the sixth area is 225 ℃, the temperature of the seventh area is 225 ℃, the temperature of the eighth area is 225 ℃, the temperature of the machine head is 225 ℃, and the feeding rotating speed is 15r/min; the vacuum degree is-0.01 MPa.
The preparation of the light-transmitting component comprises the following steps:
(1) Adding the polypropylene resin A, the polypropylene resin B and the superfine calcium carbonate into a kneader for stirring, and adding the toner A, the antioxidant and the lubricant while stirring for mixing;
(2) Adding the mixed material obtained in the step (1) into a double-screw extruder through a feeder, carrying out melt extrusion and granulating to obtain the modified polypropylene composite material; the process parameters are as follows: the temperature of the first area is 190 ℃, the temperature of the second area is 220 ℃, the temperature of the third area is 225 ℃, the temperature of the fourth area is 225 ℃, the temperature of the fifth area is 225 ℃, the temperature of the sixth area is 225 ℃, the temperature of the seventh area is 225 ℃, the temperature of the eighth area is 225 ℃, the temperature of the machine head is 225 ℃, and the feeding rotating speed is 15r/min; the vacuum degree is-0.01 MPa.
Comparative example 2 Polypropylene modified material and preparation method thereof
The polypropylene modified material of the comparative example comprises a light absorption component and a light transmission component; the light absorption component is prepared from the following raw materials in parts by weight:
the light-transmitting component is prepared from the following raw materials in parts by weight:
the preparation method of the polypropylene material of the comparative example comprises the steps of preparing a light absorption component and preparing a light transmission material;
the preparation of the light absorbing component comprises the following steps:
(1) Adding the polypropylene resin A and the superfine calcium carbonate into a kneader for stirring, and adding the toner B, the light absorber, the antioxidant and the lubricant for mixing while stirring;
(2) Adding the mixed material obtained in the step (1) into a double-screw extruder through a feeder, carrying out melt extrusion and granulating to obtain the modified polypropylene composite material; the process parameters are as follows: the temperature of the first area is 190 ℃, the temperature of the second area is 220 ℃, the temperature of the third area is 225 ℃, the temperature of the fourth area is 225 ℃, the temperature of the fifth area is 225 ℃, the temperature of the sixth area is 225 ℃, the temperature of the seventh area is 225 ℃, the temperature of the eighth area is 225 ℃, the temperature of the machine head is 225 ℃, and the feeding rotating speed is 15r/min; the vacuum degree is-0.01 MPa.
The preparation of the light-transmitting component comprises the following steps:
(1) Adding the polypropylene resin A, the polypropylene resin B and the superfine calcium carbonate into a kneader for stirring, and adding the toner A, the antioxidant and the lubricant while stirring for mixing;
(2) Adding the mixed material obtained in the step (1) into a double-screw extruder through a feeder, carrying out melt extrusion and granulating to obtain the modified polypropylene composite material; the process parameters are as follows: the temperature of the first area is 220 ℃, the temperature of the second area is 235 ℃, the temperature of the third area is 240 ℃, the temperature of the fourth area is 240 ℃, the temperature of the fifth area is 240 ℃, the temperature of the sixth area is 240 ℃, the temperature of the seventh area is 240 ℃, the temperature of the eighth area is 240 ℃, the temperature of the machine head is 240 ℃, and the feeding rotating speed is 80r/min; the vacuum degree is-0.10 MPa.
Comparative example 3 Polypropylene modified material and preparation method thereof
The polypropylene modified material of the comparative example comprises a light absorption component and a light transmission component; the light absorption component is prepared from the following raw materials in parts by weight:
the light-transmitting component is prepared from the following raw materials in parts by weight:
the preparation method of the polypropylene material of the comparative example comprises the steps of preparing a light absorption component and preparing a light transmission material;
the preparation of the light absorbing component comprises the following steps:
(1) Adding the polypropylene resin A and the superfine calcium carbonate into a kneader for stirring, and adding the toner B, the antioxidant and the lubricant while stirring for mixing;
(2) Adding the mixed material obtained in the step (1) into a double-screw extruder through a feeder, carrying out melt extrusion and granulating to obtain the modified polypropylene composite material; the process parameters are as follows: the temperature of the first area is 190 ℃, the temperature of the second area is 220 ℃, the temperature of the third area is 225 ℃, the temperature of the fourth area is 225 ℃, the temperature of the fifth area is 225 ℃, the temperature of the sixth area is 225 ℃, the temperature of the seventh area is 225 ℃, the temperature of the eighth area is 225 ℃, the temperature of the machine head is 225 ℃, and the feeding rotating speed is 15r/min; the vacuum degree is-0.01 MPa.
The preparation of the light-transmitting component comprises the following steps:
(1) Adding the polypropylene resin A, the polypropylene resin B and the superfine calcium carbonate into a kneader for stirring, and adding the toner A, the nucleating agent, the antioxidant and the lubricant while stirring for mixing;
(2) Adding the mixed material obtained in the step (1) into a double-screw extruder through a feeder, carrying out melt extrusion and granulating to obtain the modified polypropylene composite material; the process parameters are as follows: the temperature of the first area is 220 ℃, the temperature of the second area is 235 ℃, the temperature of the third area is 240 ℃, the temperature of the fourth area is 240 ℃, the temperature of the fifth area is 240 ℃, the temperature of the sixth area is 240 ℃, the temperature of the seventh area is 240 ℃, the temperature of the eighth area is 240 ℃, the temperature of the machine head is 240 ℃, and the feeding rotating speed is 80r/min; the vacuum degree is-0.10 MPa.
Comparative example 4 Polypropylene modified material and preparation method thereof
The polypropylene modified material of the comparative example comprises a light absorption component and a light transmission component; the raw materials and preparation methods of the light absorbing component and the light transmitting component are the same as those of example 2, except that friction welding is adopted when the light absorbing material and the light transmitting material are welded.
Comparative example 5 Polypropylene modified material and preparation method thereof
The polypropylene modified material of the comparative example comprises a light absorption component and a light transmission component; the light absorption component is prepared from the following raw materials in parts by weight:
the light-transmitting component is prepared from the following raw materials in parts by weight:
the preparation method of the polypropylene modified material of the comparative example comprises the steps of preparing a light absorption component and preparing a light transmission material;
the preparation of the light absorbing component comprises the following steps:
(1) Adding the polypropylene resin A and the superfine calcium carbonate into a kneader for stirring, and adding the toner B, the light absorber, the antioxidant and the lubricant for mixing while stirring;
(2) Adding the mixed material obtained in the step (1) into a double-screw extruder through a feeder, carrying out melt extrusion and granulating to obtain the modified polypropylene composite material; the process parameters are as follows: the temperature of the first area is 200 ℃, the temperature of the second area is 230 ℃, the temperature of the third area is 235 ℃, the temperature of the fourth area is 235 ℃, the temperature of the fifth area is 235 ℃, the temperature of the sixth area is 235 ℃, the temperature of the seventh area is 235 ℃, the temperature of the eighth area is 235 ℃, the temperature of the machine head is 235 ℃, and the feeding rotating speed is 15r/min; the vacuum degree is-0.01 MPa.
The preparation of the light-transmitting component comprises the following steps:
(1) Adding the polypropylene resin A, the polypropylene resin B and the superfine calcium carbonate into a kneader for stirring, and adding the toner B, the nucleating agent, the antioxidant and the lubricant while stirring for mixing;
(2) Adding the mixed material obtained in the step (1) into a double-screw extruder through a feeder, carrying out melt extrusion and granulating to obtain the modified polypropylene composite material; the process parameters are as follows: the temperature of the first area is 210 ℃, the temperature of the second area is 225 ℃, the temperature of the third area is 230 ℃, the temperature of the fourth area is 230 ℃, the temperature of the fifth area is 230 ℃, the temperature of the sixth area is 230 ℃, the temperature of the seventh area is 230 ℃, the temperature of the eighth area is 230 ℃, the temperature of the machine head is 230 ℃, and the feeding rotating speed is 50r/min; the vacuum degree is-0.10 MPa.
The following is a list of the raw material compositions of examples 1 to 3 and comparative examples 1 to 5 (Table 1).
Table 1 list of the raw materials in parts by weight for examples and comparative examples
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The light-absorbing components of the laser-weldable polypropylene materials prepared in the above examples and comparative examples were made into upper covers, the light-transmitting components were made into housings, and the following performance tests were performed on the upper covers and the housings, respectively:
tensile properties: the stretching rate is 50mm/min according to GB/T1040-2006 standard test;
impact properties: the thickness of the sample strip is 4mm according to GB/T1843-2008 standard test;
melt index: tested according to GB/T3682-2000 standard, the test temperature is 230 ℃, and the load is 2.16kg;
flexural strength: tested according to GB/T9341-2008 standard, the bending rate is 2mm/min;
the upper cover and the outer shell were laser welded by a large-family laser welding machine to form a color plate with dimensions of 100mm×100mm×3mm, and the welding force was measured on a tensile machine.
The results of the performance test are shown in Table 2.
Table 2A list of properties of the polypropylene modified materials of examples and comparative examples
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Examples 1 to 3 are polypropylene modified materials prepared by adjusting the addition amounts of polypropylene resin, toner, nucleating agent and light absorber, and it can be seen from Table 2 that the impact strength decreases with decrease in the random copolymer polypropylene (polypropylene resin B); an increase in flexural modulus; the use amount of the toner and the nucleating agent is 0.1 to 1 part, so that the welding strength of the upper cover material and the housing material is strong, and the welding strength is correspondingly increased along with the increase of the use amount of the toner and the nucleating agent, however, when the use amount is too large, the increase of the welding strength is not obvious (as in the case of 2 times of the use amount of the toner and the nucleating agent in the embodiment 3, the cost increase is obvious, but the welding strength is not obvious), and the use amount of the toner and the nucleating agent is 0.4 to 0.6 part, so that the cost can be controlled, and the good effect can be achieved. Therefore, the comprehensive performance of the embodiment 2 is optimal (the mechanical performance is good, the water hammer bursting test of the filter flask of the water purifier can be satisfied, the welding strength is high, and the material cost is proper).
Comparative example 1 in comparison with example 2, the upper cover material (light absorbing component) of comparative example 1 did not use a light absorber, and the housing material (light transmitting material) did not use a nucleating agent, and therefore, when laser welding, laser light was not transmitted much and could not be absorbed, and thus welding was not performed.
Comparative example 2 compared with example 2, the sheath material (light transmitting material) of comparative example 2 did not use a nucleating agent, and therefore, when laser welding, less laser light was transmitted and the welding force was low.
Comparative example 3 in comparison with example 2, the upper cover material (light absorbing component) of comparative example 3 did not use a light absorber, and therefore, the welding effect was completely lost when laser welding.
Comparative example 4 in comparison with example 2, comparative example 4 uses friction welding (heat energy is generated by mutual friction by high-speed rotation, material melting point is reached, and welding is performed) and welding force is small.
Comparative example 5 in comparison with example 2, the toners used for the case material and the upper cover material of comparative example 5 were all titanium white, so that the light transmittance was low and the welding force was small.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (8)
1. The polypropylene modified material capable of being welded by laser is characterized by comprising a light absorption component and a light transmission component; the light absorption component is prepared from the following raw materials in parts by weight:
the light-transmitting component is prepared from the following raw materials in parts by weight:
wherein the polypropylene resin A is homo-polypropylene; the polypropylene resin B is random copolymer polypropylene; the toner A is zinc sulfide, and the toner B is titanium dioxide; the light absorber is Cu 3 (PO 4 ) 2 Cu(OH) 2 The method comprises the steps of carrying out a first treatment on the surface of the The nucleating agent is sorbitol transparent nucleating agent.
2. The polypropylene modified laser weldable material of claim 1, wherein the light absorbing component is prepared from the following raw materials in parts by weight:
the light-transmitting component is prepared from the following raw materials in parts by weight:
3. the laser-weldable polypropylene modified material according to claim 1 or 2, wherein the melt index of the homo-polypropylene is 1.0g/10min to 6.0g/10min at 230 ℃, and the melt index of the random copolymer polypropylene is 5.0g/10min to 30g/10min at 2.16 kg.
4. The laser-weldable polypropylene modified material according to claim 1 or 2, wherein the superfine calcium carbonate has a mesh number of 8000 to 10000 mesh.
5. The polypropylene modified material capable of being welded by laser according to claim 1 or 2, wherein the antioxidant is one or more of pentaerythritol tetrakis [ beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate ], tris [2, 4-di-tert-butylphenyl ] phosphite and n-stearyl beta- (3, 5-di-tert-butyl-4-hydroxyphenyl) propionate.
6. The polypropylene modified material capable of being welded by laser according to claim 1 or 2, wherein the lubricant is one or more of calcium stearate, vinyl bis-stearamide and erucamide.
7. The method for producing a laser-weldable polypropylene modified material according to any one of claims 1 to 6, which comprises a method for producing a light-absorbing component and a method for producing a light-transmitting component; the method for preparing the light absorbing component comprises the following steps:
(1) Adding the polypropylene resin A and the superfine calcium carbonate into a kneader for stirring, and adding the toner B, the light absorber, the antioxidant and the lubricant for mixing while stirring;
(2) Adding the mixed material obtained in the step (1) into a double-screw extruder through a feeder, and performing melt extrusion granulation to obtain the composite material;
the method for preparing the light-transmitting component comprises the following steps:
(1) Adding the polypropylene resin A, the polypropylene resin B and the superfine calcium carbonate into a kneader for stirring, and adding the toner A, the nucleating agent, the antioxidant and the lubricant while stirring for mixing;
(2) Adding the mixed material obtained in the step (1) into a double-screw extruder through a feeder, and performing melt extrusion granulation to obtain the composite material;
the technological parameters of the melt extrusion granulation are as follows: the temperature of the first area is 190-220 ℃, the temperature of the second area is 220-235 ℃, the temperature of the third area is 225-240 ℃, the temperature of the fourth area is 225-240 ℃, the temperature of the fifth area is 225-240 ℃, the temperature of the sixth area is 225-240 ℃, the temperature of the seventh area is 225-240 ℃, the temperature of the eighth area is 225-240 ℃, the temperature of the machine head is 225-240 ℃, and the feeding rotating speed is 15-80 r/min; the vacuum degree is-0.01 MPa to-0.10 MPa.
8. Use of a laser-weldable polypropylene modified material according to any one of claims 1 to 6 for the preparation of a purifier filter flask.
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