Plastic alloy and preparation method thereof

Abstract

The invention relates to the technical field of plastic alloy preparation, and discloses a plastic alloy and a preparation method thereof, the plastic alloy comprises the following raw materials by weight: 10-30% of nylon, 8-25% of polyester PET resin, 5-28% of polypropylene, 3-15% of polyethylene, 7-16% of polyether-ether-ketone, 6-12% of polyetherimide, 0.1-0.5% of a compatilizer, 0.1-0.2% of a nucleating agent, 0.2-0.4% of a flame retardant, and 0.1-0.3% of magnesium dihydroxystearate. According to the plastic alloy and the preparation method thereof, different characteristics of a plurality of plastic materials are combined, the materials are fused and co-melted through the auxiliaries, the advantages of all the materials are combined, and the high-performance new alloy material has the advantages of being low in melt index, large in impact strength, good in tensile property, high in bending strength and excellent in bending modulus, and the cold resistance is 100% higher than that of existing ABS; and the polyether-ether-ketone and the polyether acyl are blended in the material, so that the high-temperature stability, the self-lubricating property, the electrical property and the radiation resistance of the plastic alloy are further improved.

Description

Technical Field

[0001] The invention relates to the technical field of plastic alloy preparation, in particular to a plastic alloy. Background Art

[0002] Plastic alloys are modified polymer materials that are widely used in automobiles, household appliances, electronics, and sporting goods.

[0003] At present, according to the existing alloy plastic preparation method, plastic alloys require certain compatibility between plastics when selecting materials, otherwise alloys cannot be formed, which greatly reduces the types and performance of material alloys. For example, PP and PC materials cannot be blended to form alloy materials. PP has high heat resistance, aging resistance, and good fluidity, but is soft, lacks rigidity, and is easy to shrink; PC has strong rigidity and good dimensional stability, but poor fluidity, is easy to age, and thermally decomposes. If the two can form an alloy, their advantages and disadvantages complement each other and can be applied in multiple fields; And polycarbonate / acrylonitrile-butadiene-styrene plastic alloy, that is, PC / ABS plastic alloy is a polycarbonate modified product that has been industrialized earlier and is an important engineering plastic alloy. PC / ABS plastic alloy has the advantages of both PC and ABS, and has good impact resistance and heat resistance. However, after PC and ABS are combined, its flame retardant performance is greatly reduced, and its bending strength, bending modulus and cold resistance are still poor, resulting in its relatively single performance and insufficient application. Therefore, a plastic alloy and a preparation method thereof are proposed to solve the above problems. Summary of the invention

[0004] 1. Technical issues to be resolved In view of the deficiencies in the prior art, the present invention provides a plastic alloy and a preparation method thereof, which has the advantages of wider performance and thus improved application paths, and solves the problem that the application paths are not wide enough due to relatively single performance.

[0005] (II) Technical solution In order to achieve the above-mentioned performance more widely and thus improve the purpose of using methods, the present invention provides the following technical scheme: a plastic alloy and a preparation method thereof, comprising the following raw materials in proportion by weight: 10-30% nylon, 8-25% polyester PET resin, 5-28% polypropylene, 3-15% polyethylene, 7-16% polyetheretherketone, 6-12% polyetherimide, 0.1%-0.5% compatibilizer, 0.1-0.2% nucleating agent, 0.2-0.4% flame retardant and 0.1-0.3% dihydroxy magnesium stearate.

[0006] Preferably, the nylon is glass fiber reinforced nylon, and the compatibilizer is one of maleic anhydride grafted polyolefin, acrylic acid grafted polyolefin resin and modified polyacrylate.

[0007] Preferably, the nucleating agent is one of talc, calcium carbonate and silicon dioxide, and the flame retardant is one of antimony oxide, zinc borate and phosphate.

[0008] Another technical problem to be solved by the present invention is to provide a method for preparing a plastic alloy, comprising the following steps: S1, placing appropriate amounts of polyetheretherketone and polyetherimide into a heating device while mixing and heating, heating to 200-300° C. and then melting to obtain a first mixture; S2, using a mixer to heat and mix the first mixture in step S1 and nylon, polyester PET resin, etc. in sequence to obtain a second mixture; S3, putting the second mixture obtained in step S2 into a twin-screw extruder for granulation; S4. Temperature control of twin-screw unit. Take the twenty-stage screw as an example: 1~2 stages, the stage where the material enters is not heated to prevent adhesion, 2 stages are kept at 230℃ for melting, 3 to 6 stages are kept at 260℃ for opening the original molecules of all materials so that they can utilize the physical effect of the additives during the high-temperature dissolution process, and then fuse to produce secondary crystallization, and 7 to 11 stages are kept at 245℃ for constant temperature for lattice resistance after polymerization reaction to obtain new alloy materials with the same molecular parameters or better results than ABS; S5. The new alloy material obtained in step S4 is produced through the rear end machine head, enters the water tank for temperature control, cooling and crystallization, and enters the final process automatic speed regulating pelletizer. After pelletizing and packaging, the new material plastic alloy is obtained.

[0009] Preferably, the mixing time of heating and mixing the first mixture in step S1 is 20-30 min, and the mixing temperature in step S2 is 230-300° C.

[0010] Preferably, the material mixing time in step S2 is 30-40 minutes, and the new material in step S5 needs to be kept warm for 60-70 minutes after entering the water tank for temperature reduction and temperature control.

[0011] (III) Beneficial effects Compared with the prior art, the present invention provides a plastic alloy and a preparation method thereof, which have the following beneficial effects: The plastic alloy and preparation method thereof, by combining the different characteristics of several plastic materials, melt-melt the several materials through additives, and combine the advantages of various materials. The high-performance new alloy new material has the advantages of low melt index, high impact strength, good tensile performance, high bending strength, excellent bending modulus, and cold resistance that is 100% higher than that of existing ABS, which is amazing to the world. The normal ABS is used at a temperature of 270 degrees in injection molding, while the new alloy product is used at a temperature of only 230 degrees, which greatly saves labor and electricity costs for users. In addition, polyetheretherketone and polyetheracryl are also blended in the material, thereby further improving the high-temperature stability, self-lubrication, electrical properties and radiation resistance of the plastic alloy. DETAILED DESCRIPTION

[0012] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention. Example

[0013] A plastic alloy comprises the following raw materials in proportion by weight: 10% nylon, 8% polyester (PET) resin, 5% polypropylene, 3% polyethylene, 7% polyetheretherketone, 6% polyetherimide, 0.1% compatibilizer, 0.1% nucleating agent, 0.2% flame retardant and 0.1% dihydroxy magnesium stearate.

[0014] In this embodiment, the nylon is glass fiber reinforced nylon, and the compatibilizer is maleic anhydride grafted polyolefin.

[0015] It should be noted that the nucleating agent is talcum powder and the flame retardant is antimony oxide.

[0016] A method for preparing a plastic alloy comprises the following steps: S1, putting appropriate amounts of polyetheretherketone and polyetherimide into a heating device while mixing and heating, heating to 200° C. and then melting to obtain a first mixture, wherein the mixing time of the first mixture while heating and mixing is 20 minutes; S2, using a mixer to heat and mix the first mixture in step S1 and nylon, polyester PET resin, etc. in sequence to obtain a second mixture, wherein the mixing temperature is 230° C. and the material mixing time is 30 min; S3, putting the second mixture obtained in step S2 into a twin-screw extruder for granulation; S4. Temperature control of twin-screw unit. Take the twenty-stage screw as an example: 1~2 stages, the stage where the material enters is not heated to prevent adhesion, 2 stages are kept at 230℃ for melting, 3 to 6 stages are kept at 260℃ for opening the original molecules of all materials so that they can utilize the physical effect of the additives during the high-temperature dissolution process, and then fuse to produce secondary crystallization, and 7 to 11 stages are kept at 245℃ for constant temperature for lattice resistance after polymerization reaction to obtain new alloy materials with the same molecular parameters or better results than ABS; S5. The new alloy material obtained in step S4 is produced through the rear end machine head, and enters the water tank for temperature control and cooling to lock the crystallization. After the new material enters the water tank for temperature control, it needs to be kept warm for 60 minutes, and then enters the final process automatic speed regulating pelletizer. After pelletizing and packaging, the new material plastic alloy is obtained. Example

[0017] A plastic alloy comprises the following raw materials in proportion by weight: 20% nylon, 16% polyester PET resin, 16% polypropylene, 9% polyethylene, 13% polyetheretherketone, 9% polyetherimide, 0.3% compatibilizer, 0.2% nucleating agent, 0.3% flame retardant and 0.2% dihydroxy magnesium stearate.

[0018] In this embodiment, the nylon is glass fiber reinforced nylon, and the compatibilizer is acrylic acid grafted polyolefin resin.

[0019] It should be noted that the nucleating agent is calcium carbonate, the nylon is PA6, and the flame retardant is zinc borate.

[0020] A method for preparing a plastic alloy comprises the following steps: S1, putting appropriate amounts of polyetheretherketone and polyetherimide into a heating device, mixing and heating, heating to 240° C. and then melting to obtain a first mixture, wherein the mixing time of the first mixture while heating and mixing is 5 minutes; S2, using a mixer to heat and mix the first mixture in step S1 and nylon, polyester PET resin, etc. in sequence to obtain a second mixture, wherein the mixing temperature is 260° C. and the material mixing time is 35 min; S3, putting the second mixture obtained in step S2 into a twin-screw extruder for granulation; S4. Temperature control of twin-screw unit. Take the twenty-stage screw as an example: 1~2 stages, the stage where the material enters is not heated to prevent adhesion, 2 stages are kept at 230℃ for melting, 3 to 6 stages are kept at 260℃ for opening the original molecules of all materials so that they can utilize the physical effect of the additives during the high-temperature dissolution process, and then fuse to produce secondary crystallization, and 7 to 11 stages are kept at 245℃ for constant temperature for lattice resistance after polymerization reaction to obtain new alloy materials with the same molecular parameters or better results than ABS; S5. The new alloy material obtained in step S4 is produced through the rear end machine head, and enters the water tank for temperature control and cooling to lock the crystallization. After the new material enters the water tank for temperature control, it needs to be kept warm for 65 minutes, and then enters the final process automatic speed regulating pelletizer. After pelletizing and packaging, the new material plastic alloy is obtained. Example

[0021] A plastic alloy comprises the following raw materials in proportion by weight: 25% nylon, 25% polyester (PET) resin, 23% polypropylene, 15% polyethylene, 6% polyetheretherketone, 5% polyetherimide, 0.5% compatibilizer, 0.2% nucleating agent, 0.4% flame retardant and 0.3% dihydroxy magnesium stearate.

[0022] In this embodiment, the nylon is glass fiber reinforced nylon, and the compatibilizer is modified polyacrylate.

[0023] It should be noted that the nucleating agent is silicon dioxide and the flame retardant is phosphate ester.

[0024] A method for preparing a plastic alloy comprises the following steps: S1, putting appropriate amounts of polyetheretherketone and polyetherimide into a heating device while mixing and heating, heating to 300° C. and then melting to obtain a first mixture, wherein the mixing time of the first mixture while heating and mixing is 30 minutes; S2, using a mixer to heat and mix the first mixture in step S1 and nylon, polyester PET resin, etc. in sequence to obtain a second mixture, wherein the mixing temperature is 300° C. and the material mixing time is 40 minutes; S3, putting the second mixture obtained in step S2 into a twin-screw extruder for granulation; S4. Temperature control of twin-screw unit. Take the twenty-stage screw as an example: 1~2 stages, the stage where the material enters is not heated to prevent adhesion, 2 stages are kept at 230℃ for melting, 3 to 6 stages are kept at 260℃ for opening the original molecules of all materials so that they can utilize the physical effect of the additives during the high-temperature dissolution process, and then fuse to produce secondary crystallization, and 7 to 11 stages are kept at 245℃ for constant temperature for lattice resistance after polymerization reaction to obtain new alloy materials with the same molecular parameters or better results than ABS; S5. The new alloy material obtained in step S4 is produced through the rear end machine head, and enters the water tank for temperature control and cooling to lock the crystallization. After the new material enters the water tank for temperature control, it needs to be kept warm for 70 minutes, and then enters the final process with an automatic speed regulating pelletizer. After pelletizing and packaging, the new material plastic alloy is obtained.

[0025] The beneficial effects of the present invention are as follows: due to the fact that malic acid xuan: links the molecular chains of various materials, it can effectively make the materials of different molecular weights more fully polymerized under its chemical molecular chain, making the molecular combination more fully full, so it is used as a compatibilizer, and dihydroxy magnesium stearate can improve the brightness of the surface of the product; nylon PA6: strong wear resistance, high bending strength, high tensile strength, good flexibility and not easy to break; polyester PET resin: good molding, high hardness, high impact strength, good surface gloss, strong transparency, but easy to break; polypropylene: strong tensile strength, easy molding, small shrinkage of the product, poor anti-aging performance; polyethylene : Good tensile strength, wear resistance and aging resistance, sun resistance and light resistance, not easy to break, durable, so this high-performance new alloy new material has the advantages of low melt index, high impact strength, good tensile performance, high bending strength, excellent bending modulus, and cold resistance 100% higher than the existing ABS, which is what makes the world amazed. The normal ABS is used at a temperature of 270 degrees in injection molding, and the new alloy product is used at a temperature of only 230 degrees, which greatly saves users labor and electricity costs, and polyetheretherketone and polyetheracryl are also blended in the material, thereby further improving the high temperature stability, self-lubrication, electrical properties and radiation resistance of the plastic alloy.

[0026] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that many changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention. Example

[0027] A plastic alloy comprises the following raw materials in proportion by weight: 10% nylon, 8% polyester (PET) resin, 5% polypropylene, 3% polyethylene, 7% polyetheretherketone, 6% polyetherimide, 0.1% compatibilizer, 0.1% nucleating agent, 0.2% flame retardant and 0.1% dihydroxy magnesium stearate.

[0028] In this embodiment, the nylon is glass fiber reinforced nylon, and the compatibilizer is maleic anhydride grafted polyolefin.

[0029] It should be noted that the nucleating agent is talcum powder and the flame retardant is antimony oxide.

[0030] A method for preparing a plastic alloy comprises the following steps: S1, putting appropriate amounts of polyetheretherketone and polyetherimide into a heating device, mixing and heating, heating to 270° C. and then melting to obtain a first mixture, wherein the first mixture is mixed and heated for 20 minutes; S2, using a mixer to heat and mix the first mixture in step S1 and nylon, polyester PET resin, etc. in sequence to obtain a second mixture, wherein the mixing temperature is 280° C. and the material mixing time is 30 min; S3, putting the second mixture obtained in step S2 into a twin-screw extruder for granulation; S4. Temperature control of twin-screw unit. Take the twenty-stage screw as an example: 1~2 stages, the stage where the material enters is not heated to prevent adhesion, 2 stages are kept at 230℃ for melting, 3 to 6 stages are kept at 260℃ for opening the original molecules of all materials so that they can utilize the physical effect of the additives during the high-temperature dissolution process, and then fuse to produce secondary crystallization, and 7 to 11 stages are kept at 245℃ for constant temperature for lattice resistance after polymerization reaction to obtain new alloy materials with the same molecular parameters or better results than ABS; S5. The new alloy material obtained in step S4 is produced through the rear end machine head, and enters the water tank for temperature control and cooling to lock the crystallization. After the new material enters the water tank for temperature control, it needs to be kept warm for 60 minutes, and then enters the final process automatic speed regulating pelletizer. After pelletizing and packaging, the new material plastic alloy is obtained. Example

[0031] A plastic alloy comprises the following raw materials in proportion by weight: 15% nylon, 20% polyester PET resin, 5% polypropylene, 3% polyethylene, 10% polyetheretherketone, 6% polyetherimide, 0.1% compatibilizer, 0.1% nucleating agent, 0.2% flame retardant and 0.1% dihydroxy magnesium stearate.

[0032] In this embodiment, the nylon is glass fiber reinforced nylon, and the compatibilizer is maleic anhydride grafted polyolefin.

[0033] It should be noted that the nucleating agent is talcum powder and the flame retardant is antimony oxide.

[0034] A method for preparing a plastic alloy comprises the following steps: S1, putting appropriate amounts of polyetheretherketone and polyetherimide into a heating device while mixing and heating, heating to 200° C. and then melting to obtain a first mixture, wherein the mixing time of the first mixture while heating and mixing is 20 minutes; S2, using a mixer to heat and mix the first mixture in step S1 and nylon, polyester PET resin, etc. in sequence to obtain a second mixture, wherein the mixing temperature is 230° C. and the material mixing time is 30 min; S3, putting the second mixture obtained in step S2 into a twin-screw extruder for granulation; S4. Temperature control of twin-screw unit. Take the twenty-stage screw as an example: 1~2 stages, the stage where the material enters is not heated to prevent adhesion, 2 stages are kept at 230℃ for melting, 3 to 6 stages are kept at 260℃ for opening the original molecules of all materials so that they can utilize the physical effect of the additives during the high-temperature dissolution process, and then fuse to produce secondary crystallization, and 7 to 11 stages are kept at 245℃ for constant temperature for lattice resistance after polymerization reaction to obtain new alloy materials with the same molecular parameters or better results than ABS; S5. The new alloy material obtained in step S4 is produced through the rear end machine head, and enters the water tank for temperature control and cooling to lock the crystallization. After the new material enters the water tank for temperature control, it needs to be kept warm for 60 minutes, and then enters the final process automatic speed regulating pelletizer. After pelletizing and packaging, the new material plastic alloy is obtained.

[0035] It is intended that the scope of the invention be defined by the following claims and their equivalents

Claims

1. A plastic alloy, characterized in that: The invention comprises the following raw materials in proportion by weight: 10-30% nylon, 8-25% polyester PET resin, 5-28% polypropylene, 3-15% polyethylene, 7-16% polyetheretherketone, 6-12% polyetherimide, 0.1%-0.5% compatibilizer, 0.1-0.2% nucleating agent, 0.2-0.4% flame retardant and 0.1-0.3% dihydroxy magnesium stearate; the nylon is glass fiber reinforced nylon, the compatibilizer is one of maleic anhydride grafted polyolefin, acrylic acid grafted polyolefin resin and modified polyacrylate; the nucleating agent is one of talc, calcium carbonate and silicon dioxide, and the flame retardant is one of antimony oxide, zinc borate and phosphate.

2. A method for preparing a plastic alloy, characterized in that: The following steps are involved: S1, placing appropriate amounts of polyetheretherketone and polyetherimide into a heating device while mixing and heating, heating to 200-300° C. and then melting to obtain a first mixture; S2, using a mixer to heat and mix the first mixture in step S1 and nylon, polyester PET resin, etc. in sequence to obtain a second mixture; S3, putting the second mixture obtained in step S2 into a twin-screw extruder for granulation; S4. Temperature control of twin-screw unit. Take the twenty-stage screw as an example: 1~2 stages, the stage where the material enters is not heated to prevent adhesion, 2 stages are kept at 230℃ for melting, 3 to 6 stages are kept at 260℃ for opening the original molecules of all materials so that they can utilize the physical effect of the additives during the high-temperature dissolution process, and then fuse to produce secondary crystallization, and 7 to 11 stages are kept at 245℃ for constant temperature for lattice resistance after polymerization reaction to obtain new alloy materials with the same molecular parameters or better results than ABS; S5. The new alloy material obtained in step S4 is produced through the rear end machine head, enters the water tank for temperature control, cooling and crystallization, and enters the final process automatic speed regulating pelletizer. After pelletizing and packaging, the new material plastic alloy is obtained.

3. The method for preparing a plastic alloy according to claim 2, characterized in that: The mixing time of heating and mixing the first mixture in step S1 is 20-30 minutes, and the mixing temperature in step S2 is 230-300°C.

4. The method for preparing a plastic alloy according to claim 2, characterized in that: The material mixing time in step S2 is 30-40 minutes, and the new material in step S5 needs to be kept warm for 60-70 minutes after entering the water tank for temperature reduction and temperature control.