CN112940482B - Composite material suitable for in-mold injection molding and preparation method thereof - Google Patents
Composite material suitable for in-mold injection molding and preparation method thereof Download PDFInfo
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- C08L69/00—Compositions of polycarbonates; Compositions of derivatives of polycarbonates
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- C—CHEMISTRY; METALLURGY
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- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
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Abstract
The invention relates to the technical field of PC/ABS alloy modified engineering plastics, in particular to a composite material suitable for in-mold injection molding and a preparation method thereof; the composite material comprises the following raw materials: polycarbonate, a carbonate-organosiloxane copolymer, an acrylonitrile-butadiene-styrene copolymer, polyethylene glycol terephthalate, a toughening agent, a flame retardant, an anti-dripping agent, an antioxidant, a lubricant and glass fiber, the mechanical property of the composite material is improved, the high fluidity of the composite material is suitable for low-temperature injection molding in a mold, the injection molding temperature reaches 230 ℃, the injection molding can be carried out, the low-temperature low-pressure injection molding can be adopted, and wrinkles, deformation and pattern punching of the decorative sheet are avoided; meanwhile, the composite material has good adhesion with the decorative sheet, is used for an in-mold injection molding process, and has the advantages of stable molding process and high yield.
Description
Technical Field
The invention relates to the technical field of PC/ABS alloy modified engineering plastics, in particular to a composite material suitable for in-mold injection molding and a preparation method thereof.
Background
The in-mold injection molding process, also known as in-mold insert Injection Molding Decoration (IMD), is to put the printed and molded decorative sheet into an injection mold in advance, and then inject the modified plastic material into the back of the molded sheet by means of injection molding, so as to realize the integral curing molding of the plastic resin and the decorative sheet. The technology is a popular surface decoration technology at home and abroad at present, and is mainly used for the outer surface decoration of mobile phone shells, air conditioner panels, washing machine refrigerator shells, automobile instrument panels and the like. The material of decorative sheet in IMD process generally uses PET or PC as main component, chinese patent CN 102416688A discloses a treatment process of in-mold injection product, said patent provides a treatment process of in-mold injection product, said product treated by said process possesses obvious high edge angle and high stereoscopic effect, and its surface appearance is very excellent. However, this patent does not describe the plastic material of the treatment process in more detail.
In the prior art, the main problems of the injection molding of the plastic raw material into the formed sheet include the occurrence of wrinkles on the sheet, the deformation of an injection molded part, the punching of the sheet pattern by the overheated plastic material and the falling and peeling of the sheet and the plastic material after the integral forming, thereby greatly reducing the yield of products.
Disclosure of Invention
In order to overcome the defects and shortcomings in the prior art, the invention aims to provide a composite material which is high in fluidity and suitable for in-mold injection.
The invention also aims to provide a preparation method of the composite material suitable for in-mold injection, which is simple to operate, convenient to control, high in production efficiency, low in production cost and applicable to large-scale production.
The purpose of the invention is realized by the following technical scheme: the composite material suitable for in-mold injection molding comprises the following raw materials in parts by weight:
the composite material suitable for in-mold injection molding disclosed by the invention is characterized in that polycarbonate is taken as a main resin, and additives such as a carbonate-organic siloxane copolymer, an acrylonitrile-butadiene-styrene copolymer, polyethylene glycol terephthalate, a toughening agent, a flame retardant, an anti-dripping agent, an antioxidant, a lubricant, glass fiber and the like are added, so that the mechanical property of the composite material is improved, the high fluidity of the composite material is suitable for in-mold low-temperature injection molding, the injection molding temperature reaches 230 ℃, the injection molding can be carried out, the low-temperature low-pressure injection molding can be adopted, and the decorative sheet is prevented from wrinkling, deformation and pattern punching; meanwhile, the composite material has good adhesion with the decorative sheet, is used for an in-mold injection molding process, and has the advantages of stable molding process and high yield. The added polycarbonate and polyethylene terephthalate enable the composite material to have good compatibility with PET or PC decorative sheets, and the adhesive force between the composite material and the decorative sheets is high. The glass fiber is adopted for reinforcement, so that the rigidity of the composite material is improved, and the injection molded part of the composite material is not easy to warp and deform; the mechanical property and the processing property of the composite material are improved by adopting the synergistic effect of the carbonate-organic siloxane copolymer, the acrylonitrile-butadiene-styrene copolymer, the polyethylene glycol terephthalate, the flexibilizer and the lubricant. If the amount of ABS is controlled to be 5-15 parts, the flowability of the material is easily reduced if the amount of ABS is too small, and the strength of the material is easily reduced if the amount of ABS is too high, so that the use requirement cannot be met. The anti-dripping agent is polytetrafluoroethylene.
Preferably, the polycarbonate is non-phosgene method polycarbonate with the weight-average molecular weight of 17000-24000, and the melt index of the polycarbonate is 10-22g/10min under the test conditions of 300 ℃ and 1.2 kg.
By adopting the technical scheme, the influence of chlorine in the polycarbonate on the mechanical property and the service life of the material is avoided. The weight average molecular weight of the polycarbonate is controlled to be 17000-24000, and the influence on the high fluidity of the composite material caused by high melt viscosity and reduced melt index is avoided.
Preferably, the carbonate-organosiloxane copolymer has a weight average molecular weight of 15000 to 20000 and an organosiloxane segment content of 8 to 15wt%.
By adopting the technical scheme, the weight average molecular weight of the carbonate-organosiloxane copolymer is controlled to be 15000-20000 so as to ensure the melt index of the carbonate-organosiloxane copolymer and improve the toughness of the material, and the phenomenon that the melt index of the carbonate-organosiloxane copolymer is too high to reduce the toughness of the material and is too low to influence the high fluidity of the material is avoided. The content of the organic siloxane chain segment is controlled to be 8-15wt%, so that the toughness of the composite material and the adhesion of the composite material to a decorative sheet are improved, the compatibility is improved by interaction with glass fiber, the processing of the composite material is promoted, and the mechanical property of the material is improved.
Preferably, the acrylonitrile-butadiene-styrene copolymer has a butadiene segment content of 15 to 20wt% and a melt index of 5 to 15g/10min at 220 ℃ under a test condition of 5 kg.
By adopting the technical scheme, the butadiene chain segment content of the ABS is controlled to be 15-20wt%, the butadiene chain segment content of the ABS and the carbonate-organosiloxane copolymer and the toughening agent act together to improve the toughness of the composite material, the melt index is controlled to be 5-15g/10min, and the problems that the material flowability is reduced due to too low melt index, and the mechanical property of the material is influenced due to too high melt index are avoided.
Preferably, the crystallinity of the polyethylene terephthalate is 5 to 10%.
By adopting the technical scheme, the compatibility and stability of the polyethylene glycol terephthalate in the composite material are improved, the processing performance is improved, and the fluidity of the composite material is improved, in addition, the crystallinity of the polyethylene glycol terephthalate is controlled to be 5-10%, so that the bonding force between the composite material and the decorative sheet is promoted, and the yield is improved.
Preferably, the toughening agent is at least one of ethylene-octene-maleic anhydride terpolymer, methyl methacrylate-butadiene-styrene copolymer, methyl methacrylate-organosiloxane-styrene copolymer or maleic anhydride grafted thermoplastic polyurethane.
By adopting the technical scheme, the impact toughness and the processing fluidity are improved.
Preferably, the flame retardant is at least one of bisphenol a-bis (diphenyl phosphate), resorcinol diphosphate, triphenyl phosphate, or tris (β -chloroethyl) phosphate; the antioxidant is at least one of antioxidant 1010, high temperature antioxidant 412S, antioxidant 1076, antioxidant 168, or antioxidant 626.
By adopting the technical scheme, the flame retardant adopts organophosphorus flame retardant to promote the compatibility of the flame retardant and polycarbonate, so that the flame retardant effect is improved, and the processing fluidity of the composite material is improved. The antioxidant is adopted to improve the aging and yellowing resistance of the composite material.
Preferably, the glass fiber is alkali-free chopped glass fiber with monofilament diameter of 7-13 μm and chopped length of 3-10 mm.
By adopting the technical scheme, the glass fiber is compounded in the composite material under the synergistic action of the carbonate-organic siloxane copolymer, so that the glass fiber is prevented from suspending on the surface of the composite material to influence the material performance and the adhesion of the glass fiber to the decorative sheet.
Preferably, the lubricant is at least one of pentaerythritol stearate type lubricant, ethylene wax or silicone oil.
By adopting the technical scheme, the flowability of the composite material in the processing process and the flowability of the composite material in the injection molding process can be improved, and the mixing torque and the load are reduced, so that the thermal degradation of the composite material is prevented, the efficiency of dispersing the material is improved, the friction degree between the composite material and mechanical equipment in the preparation process can be reduced, the processing difficulty can be reduced, the processing is convenient, and the energy consumption is saved.
The other purpose of the invention is realized by the following technical scheme: the preparation method of the composite material suitable for in-mold injection molding comprises the following steps:
(S1) taking polycarbonate, a carbonate-organosiloxane copolymer, an acrylonitrile-butadiene-styrene copolymer, polyethylene terephthalate, a toughening agent, a flame retardant, an anti-dripping agent, an antioxidant, a lubricant and glass fiber in parts by weight for later use;
(S2) mixing polycarbonate, a carbonate-organosiloxane copolymer, an acrylonitrile-butadiene-styrene copolymer, polyethylene terephthalate, a toughening agent, a flame retardant, an anti-dripping agent, an antioxidant and a lubricant for 5-15min to obtain a premix;
(S3) extruding and granulating the premix by a double-screw extruder, and adding glass fiber by a weight loss scale through side feeding to obtain the composite material suitable for in-mold injection molding.
In the step (3), the temperature of each zone of the twin-screw extruder is as follows: 200-250 ℃, 200-250 ℃ 200-250 ℃, the die head temperature is 200-250 ℃, the screw rotating speed is 300-430rpm, the screw length-diameter ratio is 26:1.
the invention has the beneficial effects that: the composite material suitable for in-mold injection molding disclosed by the invention takes polycarbonate as main resin, and is added with additives such as carbonate-organic siloxane copolymer, acrylonitrile-butadiene-styrene copolymer, polyethylene glycol terephthalate, toughening agent, flame retardant, anti-dripping agent, antioxidant, lubricant, glass fiber and the like, so that the mechanical property of the composite material is improved, the high fluidity of the composite material is suitable for in-mold low-temperature injection molding, the injection molding temperature can reach 230 ℃, the injection molding can be carried out, the low-temperature low-pressure injection molding can be adopted, and wrinkles, deformation and pattern punching of decorative sheets are avoided; meanwhile, the composite material has good adhesion with the decorative sheet, is used for an in-mold injection molding process, and has the advantages of stable molding process and high yield.
The preparation method of the composite material suitable for in-mold injection molding is simple to operate, convenient to control, high in production efficiency, low in production cost and capable of being used for large-scale production.
Detailed Description
The present invention will be further described with reference to the following examples for facilitating understanding of those skilled in the art, and the description of the embodiments is not intended to limit the present invention.
Example 1
The composite material suitable for in-mold injection molding comprises the following raw materials in parts by weight:
the polycarbonate is non-phosgene method polycarbonate with the weight average molecular weight of 20000, and the melt index of the polycarbonate under the test conditions of 300 ℃ and 1.2kg is 16g/10min.
The carbonate-organosiloxane copolymer had a weight average molecular weight of 18000 and an organosiloxane segment content of 10wt%.
The acrylonitrile-butadiene-styrene copolymer has a butadiene segment content of 18wt% and a melt index of 10g/10min at 220 ℃ under a test condition of 5 kg.
The crystallinity of the polyethylene terephthalate was 8%.
The toughening agent is an ethylene-octene-maleic anhydride terpolymer.
The flame retardant is bisphenol a-bis (diphenyl phosphate); the antioxidant is an antioxidant 1010 and an antioxidant 168 in a weight ratio of 1:2, mixing the components.
The glass fiber is alkali-free chopped glass fiber with monofilament diameter of 10 μm and chopped length of 6 mm.
The lubricant is pentaerythritol stearate.
The preparation method of the composite material suitable for in-mold injection molding comprises the following steps:
(S1) taking polycarbonate, a carbonate-organosiloxane copolymer, an acrylonitrile-butadiene-styrene copolymer, polyethylene terephthalate, a toughening agent, a flame retardant, polytetrafluoroethylene, an antioxidant, a lubricant and glass fiber in parts by weight for later use;
(S2) mixing polycarbonate, a carbonate-organosiloxane copolymer, an acrylonitrile-butadiene-styrene copolymer, polyethylene terephthalate, a toughening agent, a flame retardant, polytetrafluoroethylene, an antioxidant and a lubricant for 10min to obtain a premix;
and (S3) extruding and granulating the premix by a double-screw extruder, and adding glass fibers by a weight loss scale through side feeding to obtain the composite material suitable for in-mold injection molding.
In the step (3), the temperature of each zone of the double-screw extruder is as follows: 220 ℃, 230 ℃, 240 ℃, 250 ℃, 240 ℃, 250 ℃, 230 ℃ of die head temperature, 350rpm of screw rotation speed, 26:1.
example 2
The composite material suitable for in-mold injection molding comprises the following raw materials in parts by weight:
the polycarbonate is non-phosgene method polycarbonate with the weight-average molecular weight of 17000, and the melt index of the polycarbonate is 20g/10min under the test conditions of 300 ℃ and 1.2 kg.
The carbonate-organosiloxane copolymer had a weight average molecular weight of 15000 and an organosiloxane segment content of 8wt%.
The content of a butadiene chain segment of the acrylonitrile-butadiene-styrene copolymer is 15wt%, and the melt index of the acrylonitrile-butadiene-styrene copolymer under the test conditions of 220 ℃ and 5kg is 5g/10min.
The crystallinity of the polyethylene terephthalate was 5%.
The toughening agent is methyl methacrylate-butadiene-styrene copolymer.
The flame retardant is resorcinol diphosphate; the antioxidant is an antioxidant 1010 and an antioxidant 168, and the weight ratio is 1:2, mixing the components.
The glass fiber is alkali-free chopped glass fiber with monofilament diameter of 7 mu m and chopped length of 3 mm.
The lubricant is pentaerythritol stearate.
The preparation method of the composite material suitable for in-mold injection molding comprises the following steps:
(S1) taking polycarbonate, a carbonate-organosiloxane copolymer, an acrylonitrile-butadiene-styrene copolymer, polyethylene terephthalate, a toughening agent, a flame retardant, polytetrafluoroethylene, an antioxidant, a lubricant and glass fiber in parts by weight for later use;
(S2) mixing polycarbonate, a carbonate-organosiloxane copolymer, an acrylonitrile-butadiene-styrene copolymer, polyethylene terephthalate, a toughening agent, a flame retardant, polytetrafluoroethylene, an antioxidant and a lubricant for 5min to obtain a premix;
and (S3) extruding and granulating the premix by a double-screw extruder, and adding glass fibers by a weight loss scale through side feeding to obtain the composite material suitable for in-mold injection molding.
In the step (3), the temperature of each zone of the double-screw extruder is as follows: 200 ℃, 210 ℃, 250 ℃, 230 ℃, 210 ℃, 250 ℃, 210 ℃, 220 ℃ of die head temperature, 350rpm of screw rotation speed, 26:1.
example 3
The composite material suitable for in-mold injection molding comprises the following raw materials in parts by weight:
the polycarbonate is non-phosgene method polycarbonate with the weight average molecular weight of 24000, and the melt index of the polycarbonate is 10g/10min under the test conditions of 300 ℃ and 1.2 kg.
The carbonate-organosiloxane copolymer has a weight average molecular weight of 20000 and an organosiloxane segment content of 15wt%.
The content of the butadiene chain segment of the acrylonitrile-butadiene-styrene copolymer is 20wt%, and the melt index of the acrylonitrile-butadiene-styrene copolymer under the test conditions of 220 ℃ and 5kg is 15g/10min.
The crystallinity of the polyethylene terephthalate was 10%.
The toughening agent is a methyl methacrylate-organosiloxane-styrene copolymer.
The flame retardant is bisphenol a-bis (diphenyl phosphate); the antioxidant is an antioxidant 1010 and an antioxidant 168, and the weight ratio is 1:2, mixing the components.
The glass fiber is alkali-free chopped glass fiber with monofilament diameter of 13 μm and chopped length of 10 mm.
The lubricant is pentaerythritol stearate.
The preparation method of the composite material suitable for in-mold injection molding comprises the following steps:
(S1) taking polycarbonate, a carbonate-organosiloxane copolymer, an acrylonitrile-butadiene-styrene copolymer, polyethylene terephthalate, a toughening agent, a flame retardant, polytetrafluoroethylene, an antioxidant, a lubricant and glass fiber in parts by weight for later use;
(S2) mixing polycarbonate, a carbonate-organosiloxane copolymer, an acrylonitrile-butadiene-styrene copolymer, polyethylene terephthalate, a toughening agent, a flame retardant, polytetrafluoroethylene, an antioxidant and a lubricant for 15min to obtain a premix;
(S3) extruding and granulating the premix by a double-screw extruder, and adding glass fiber by a weight loss scale through side feeding to obtain the composite material suitable for in-mold injection molding.
In the step (3), the temperature of each zone of the double-screw extruder is as follows: 230 ℃, 250 ℃, 200 ℃, 250 ℃, 210 ℃ of die head temperature, 350rpm of screw rotation speed, 26:1.
example 4
The composite material suitable for in-mold injection molding comprises the following raw materials in parts by weight:
the polycarbonate is non-phosgene method polycarbonate with the weight average molecular weight of 20000, and the melt index of the polycarbonate is 18g/10min under the test conditions of 300 ℃ and 1.2 kg.
The carbonate-organosiloxane copolymer has a weight average molecular weight of 16000 and an organosiloxane segment content of 10wt%.
The content of a butadiene chain segment of the acrylonitrile-butadiene-styrene copolymer is 16wt%, and the melt index of the acrylonitrile-butadiene-styrene copolymer under the test conditions of 220 ℃ and 5kg is 8g/10min.
The crystallinity of the polyethylene terephthalate was 6%.
The toughening agent is an ethylene-octene-maleic anhydride terpolymer.
The flame retardant is bisphenol a-bis (diphenyl phosphate); the antioxidant is an antioxidant 1010 and an antioxidant 168, and the weight ratio is 1:2, mixing the components.
The glass fiber is alkali-free chopped glass fiber with monofilament diameter of 8 μm and chopped length of 5 mm.
The lubricant is pentaerythritol stearate.
The preparation method of the composite material suitable for in-mold injection molding comprises the following steps:
(S1) taking polycarbonate, a carbonate-organosiloxane copolymer, an acrylonitrile-butadiene-styrene copolymer, polyethylene terephthalate, a toughening agent, a flame retardant, polytetrafluoroethylene, an antioxidant, a lubricant and glass fiber in parts by weight for later use;
(S2) mixing polycarbonate, a carbonate-organosiloxane copolymer, an acrylonitrile-butadiene-styrene copolymer, polyethylene terephthalate, a toughening agent, a flame retardant, polytetrafluoroethylene, an antioxidant and a lubricant for 8min to obtain a premix;
and (S3) extruding and granulating the premix by a double-screw extruder, and adding glass fibers by a weight loss scale through side feeding to obtain the composite material suitable for in-mold injection molding.
In the step (3), the temperature of each zone of the double-screw extruder is as follows: 220 ℃, 240 ℃, 220 ℃, 250 ℃, 220 ℃, 210 ℃, 250 ℃ of die head temperature, 350rpm of screw rotation speed, 26:1.
comparative example 1
This comparative example differs from example 1 in that:
the composite material suitable for in-mold injection molding is free of carbonate-organosiloxane copolymers.
Comparative example 2
This comparative example differs from example 1 in that:
the carbonate-organosiloxane copolymer has an organosiloxane segment content of 5wt%.
Comparative example 3
This comparative example differs from example 1 in that:
the composite material suitable for in-mold injection molding does not contain polyethylene terephthalate.
Comparative example 4
This comparative example differs from example 1 in that:
the composite material suitable for in-mold injection molding is free of acrylonitrile-butadiene-styrene copolymer.
Comparative example 5
This comparative example differs from example 1 in that:
the acrylonitrile-butadiene-styrene copolymer was replaced with AS resin NF2200.
Example 5
The composite materials of examples 1 to 4 and comparative examples 1 to 5 were tested for melt index, flexural modulus, flexural strength, tensile strength, elongation at break, notched impact strength, flame retardant rating, adhesion to PET decorative sheets, and IMD process yield of cell phone cases.
Wherein the melt index test condition is 250 ℃/2.16Kg; the tensile test condition is 20mm/min, and the bending test condition is 20mm/min; the thickness of the flame retardant grade test is 1.5mm; the testing condition of the bonding condition with the PET decorative sheet is that the PET decorative sheet is placed in an injection mold and is tested after the composite material is subjected to injection molding at 230 ℃; the judgment condition of the IMD process yield of the mobile phone shell is artificially evaluated according to the conditions of wrinkling of the sheet, deformation of an injection molding part, punching of the sheet pattern by the overheated plastic material and peeling of the sheet and the plastic material after integral forming.
The test results are shown in the following table:
as can be seen from the above table, the composite material according to the embodiment has good mechanical properties, and the yield of the IMD process is within an acceptable range, and can be successfully used in the IMD forming process. In comparison with the test results of example 1, comparative example 1, in which no carbonate-organosiloxane copolymer was added, had significantly reduced mechanical properties, insufficient rigidity, and also affected flame retardancy, and lowered IMD process yield. Compared with comparative example 2, the content of the organosiloxane segment of the specific carbonate-organosiloxane copolymer used in example 1 significantly improved the mechanical properties (tensile strength, impact strength, elongation at break) of the composite, and the IMD process yield was also improved. In comparison with the test results of example 1 and comparative example 3, when the PET component was not added to the composite material, the adhesion between the composite material and the decorative substrate was significantly reduced, and the IMD process yield was significantly reduced. Compared with the comparative examples 4 and 5, the ABS resin is added in the example 1, so that the melt index of the composite material is greatly improved, the high-fluidity characteristic of the composite material is ensured, and the processability is improved.
The above-described embodiments are preferred implementations of the present invention, and the present invention may be implemented in other ways without departing from the spirit of the present invention.
Claims (6)
1. The composite material suitable for in-mold injection molding is characterized by comprising the following raw materials in parts by weight:
the weight average molecular weight of the carbonate-organosiloxane copolymer is 15000-20000, and the content of organosiloxane chain segments is 8-15wt%;
the butadiene chain segment content of the acrylonitrile-butadiene-styrene copolymer is 15-20wt%, and the melt index of the acrylonitrile-butadiene-styrene copolymer is 5-15g/10min at 220 ℃ under the test condition of 5 kg;
the toughening agent is at least one of ethylene-octene-maleic anhydride terpolymer, methyl methacrylate-butadiene-styrene copolymer, methyl methacrylate-organosiloxane-styrene copolymer or maleic anhydride grafted thermoplastic polyurethane;
the polycarbonate is non-phosgene method polycarbonate with the weight-average molecular weight of 17000-24000, and the melt index of the polycarbonate is 10-22g/10min under the test conditions of 300 ℃ and 1.2 kg;
the anti-dripping agent is polytetrafluoroethylene.
2. A composite material suitable for in-mold injection molding according to claim 1, wherein: the crystallinity of the polyethylene terephthalate is 5-10%.
3. A composite material suitable for in-mold injection molding according to claim 1, wherein: the flame retardant is at least one of bisphenol A-bis (diphenyl phosphate), resorcinol diphosphate, triphenyl phosphate or tris (beta-chloroethyl) phosphate; the antioxidant is at least one of antioxidant 1010, high temperature antioxidant 412S, antioxidant 1076, antioxidant 168, or antioxidant 626.
4. A composite material suitable for in-mold injection molding according to claim 1, wherein: the glass fiber is alkali-free chopped glass fiber with monofilament diameter of 7-13 μm and chopped length of 3-10 mm.
5. A composite material suitable for in-mold injection molding according to claim 1, wherein: the lubricant is at least one of pentaerythritol stearate lubricant, ethylene wax or organic silicone oil.
6. A method of making a composite material suitable for in-mold injection molding according to any of claims 1 to 5, comprising the steps of:
(S1) taking polycarbonate, a carbonate-organosiloxane copolymer, an acrylonitrile-butadiene-styrene copolymer, polyethylene terephthalate, a toughening agent, a flame retardant, an anti-dripping agent, an antioxidant, a lubricant and glass fiber in parts by weight for later use;
(S2) mixing polycarbonate, a carbonate-organosiloxane copolymer, an acrylonitrile-butadiene-styrene copolymer, polyethylene terephthalate, a toughening agent, a flame retardant, an anti-dripping agent, an antioxidant and a lubricant for 5-15min to obtain a premix;
(S3) extruding and granulating the premix by a double-screw extruder, and adding glass fiber by a weight loss scale through side feeding to obtain the composite material suitable for in-mold injection molding.
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| US20090023871A9 (en) * | 2004-08-05 | 2009-01-22 | General Electric Company | Flame retardant thermoplastic polycarbonate compositions, method of manufacture, and method of use thereof |
| JP2010126706A (en) * | 2008-12-01 | 2010-06-10 | Teijin Chem Ltd | Resin composition for film insert molding, and molded article of the same |
| CN101831164B (en) * | 2010-04-21 | 2011-12-07 | 深圳市科聚新材料有限公司 | IMD (In-Mole Decoration) injection molding PC/ABS (Polycarbonate/Acrylonitrile Butadiene Styrene) composite material and preparation method |
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| CN106977891B (en) * | 2017-03-17 | 2019-03-29 | 广东新通彩材料科技有限公司 | A kind of low temperature resistant halogen-free flame-retardant polycarbonate composition and application thereof |
| CN110511550B (en) * | 2018-05-21 | 2022-02-22 | 高新特殊工程塑料全球技术有限公司 | Polycarbonate composition, molded article comprising the same, and method for producing the article |
| CN109608856B (en) * | 2018-11-23 | 2020-11-10 | 中广核俊尔新材料有限公司 | Special flame-retardant polycarbonate alloy material for charging pile shell and preparation method thereof |
| CN110591321B (en) * | 2019-08-30 | 2021-05-04 | 金发科技股份有限公司 | Glass fiber reinforced polycarbonate composite material and preparation method and application thereof |
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