Preparation method and application of heating plastic
阅读说明：本技术 一种发热塑料的制备方法及应用 (Preparation method and application of heating plastic ) 是由 赵正平 沈思涛 陈枫 钟明强 于 2019-09-24 设计创作，主要内容包括：本发明公开了一种发热塑料的制备方法及应用,以高密度聚乙烯、聚对本二甲酸丁二醇酯、碳黑、硅藻土、抗氧剂作为原料,通过原料混合、密炼机密炼、混炼切粒、二次造粒的制备工序制备出了发热复合塑料。本发明提出了一种发热塑料的制备方法及应用,制备所得的自发热材料具备良好的低温发热热源特性,制备的发热元件在汽车电源下能够正常发热,升温迅速,发热量适宜,利用此材料制备组合加热器能够满足柴油车冬季冷启动的要求,并且本材料制备的汽车元件使用方便、安全、节能,有望在汽车领域进行广泛应用。(The invention discloses a preparation method and application of heating plastic, wherein high-density polyethylene, polybutylene terephthalate, carbon black, diatomite and an antioxidant are used as raw materials, and the heating composite plastic is prepared through the preparation procedures of raw material mixing, banburying by an internal mixer, mixing, granulating and secondary granulation. The invention provides a preparation method and application of heating plastic, the prepared self-heating material has good low-temperature heating heat source characteristics, the prepared heating element can normally heat under an automobile power supply, the temperature rise is rapid, the heating amount is proper, the combined heater prepared by the material can meet the requirement of cold start of a diesel vehicle in winter, and the automobile element prepared by the material is convenient to use, safe and energy-saving, and is expected to be widely applied to the automobile field.)
1. The preparation method and the application of the heating plastic are characterized by comprising the following steps:
step one, weighing high-density polyethylene, polybutylene terephthalate, carbon black, diatomite and an antioxidant according to the dosage of a formula, and uniformly stirring in a high-speed mixer at the stirring speed of 2000 ~ 4000 r/minStirring temperature 40oC, stirring for 5 ~ 10 min to obtain a mixed material, wherein the formula of the self-heating plastic is prepared from the following raw materials, by mass, 50 ~ 60 parts of high-density polyethylene, 20 ~ 30 parts of polybutylene terephthalate, 10 ~ 20 parts of carbon black, 8 ~ 12 parts of diatomite, and 0.8 ~ 1.5.5 parts of an antioxidant;
step two, placing the mixed material obtained in the step one in a 1L internal mixer for internal mixing for 15 min, and discharging after completion, wherein the set temperatures of a first area, a second area and a third area of the internal mixer are all 160 DEGoC. The rotating speed is 50 min/r;
step three, the temperature of the material obtained after the mixing in the step two is 145 ℃ at the front and rear rollersoC, performing double-roller upper and lower sheet cutting, and obtaining long granules with the length of 2 ~ 8 mm;
step four, adding the long granules obtained in the step three into a double-screw extruder for secondary granulation to obtain the required granular special material of the self-heating plastic, wherein the temperature set value of each area of the double-screw extruder is 155 ~ 158 of the conveying section temperatureoC, melt section 165 ~ 168oC, mixing section 168 ~ 170oC, exhaust section 168 ~ 170oC, homogenizing section 168 ~ 170oC。
2. The preparation method and application of the heat-generating plastic as claimed in claim 1, wherein the particle size of the carbon black is 10 ~ 20 nm.
3. The preparation method and the application of the heat-generating plastic as claimed in claim 1, wherein the antioxidant is antioxidant 1010 or antioxidant 1076.
4. The preparation method and application of the heat-generating plastic according to claim 1, wherein the self-heating plastic is particularly used for manufacturing a heat-generating pipe head, a sleeve heater or a combined heater.
Technical Field
The invention relates to the technical field of self-heating plastic preparation, in particular to a preparation method and application of heating plastic.
Background
The positive temperature coefficient material is a temperature sensitive conductive material with automatic temperature control effect, the resistance of the material can change along with the change of the self temperature, and the resistivity can be rapidly increased at a certain transition temperature, so that the material is changed from a conductor to an insulator, thereby playing the role of automatic heating and temperature control. In cold seasons, diesel locomotives, ships, drilling rigs and starting equipment can not be started or thrown out midway due to wax deposition of diesel oil at too low temperature, drivers often use fuel tanks and other parts which are baked by fire, but accidents such as fire or vehicle combustion and the like can be caused, and even the life and property safety of people is threatened in severe cases, so that the invention researches a heating composite plastic for manufacturing components of diesel vehicles in order to solve the problem that the existing diesel vehicles are difficult to start at low temperature, and the heating composite plastic is applied to the field of manufacturing corresponding automobile components.
Disclosure of Invention
In order to solve the problems in the prior art and solve the problem that the conventional diesel vehicle is difficult to start at low temperature, the invention researches a heating composite plastic which can be used for manufacturing a diesel vehicle starting component, can normally heat under the condition that an automobile power supply is electrified, can quickly heat, meets the requirement of cold start of the diesel vehicle in winter, is convenient to use, and is safe and energy-saving.
The technical scheme adopted by the invention for solving the technical problems is as follows: the preparation method of the heating plastic comprises the following steps:
step one, weighing high-density polyethylene, polybutylene terephthalate, carbon black, diatomite and an antioxidant according to the dosage of a formula, and uniformly stirring in a high-speed mixer, wherein the stirring speed of the high-speed mixer is 2000 ~ 4000 r/min, and the stirring temperature is 40oC, stirring for 5 ~ 10 min to obtain a mixed material, wherein the formula of the self-heating plastic is prepared from the following raw materials, by mass, 50 ~ 60 parts of high-density polyethylene, 20 ~ 30 parts of polybutylene terephthalate, 10 ~ 20 parts of carbon black, 8 ~ 12 parts of diatomite, and 0.8 ~ 1.5.5 parts of an antioxidant;
step two, placing the mixed material obtained in the step one in a 1L internal mixer for internal mixing for 15 min, and then carrying out internal mixingDischarging, wherein the set temperatures of the first zone, the second zone and the third zone of the internal mixer are all 160 DEG CoC. The rotating speed is 50 min/r;
step three, the temperature of the material obtained after the mixing in the step two is 145 ℃ at the front and rear rollersoC, performing double-roller upper and lower sheet cutting, and obtaining long granules with the length of 2 ~ 8 mm;
step four, adding the long granules obtained in the step three into a double-screw extruder for secondary granulation to obtain the required granular special material of the self-heating plastic, wherein the temperature set value of each area of the double-screw extruder is 155 ~ 158 of the conveying section temperatureoC, melt section 165 ~ 168oC, mixing section 168 ~ 170oC, exhaust section 168 ~ 170oC, homogenizing section 168 ~ 170oC。
In the preparation method of the heating plastic, the particle size of the carbon black is 10 ~ 20 nm.
In the preparation method of the heating plastic, the antioxidant is antioxidant 1010 or antioxidant 1076.
The self-heating plastic is applied to the field of automobiles, and is particularly used for manufacturing a heating tube head, a sleeve heater or a combined heater.
Compared with the prior art, the invention has the following beneficial technical effects:
the invention provides a preparation method and application of heating plastic, the required automobile components can be prepared by casting molding or injection molding of the heating plastic, the heating plastic has good low-temperature heating heat source characteristics, the prepared heating element can normally heat under an automobile power supply, the temperature rise is rapid, the heating is stable, the combined heater prepared by the material can meet the requirement of cold start of a diesel vehicle in winter, and the automobile components prepared by the material are convenient to use, safe and energy-saving, and are expected to be widely popularized and applied in the automobile field.
Detailed Description
In order that those skilled in the art will better understand the technical solutions of the present invention, the present invention will be explained in detail with reference to the following embodiments.
[ example 1 ]
A preparation method and application of heating plastic comprise the following steps:
step one, weighing high-density polyethylene, polybutylene terephthalate, carbon black, diatomite and an antioxidant according to the dosage of a formula, and uniformly stirring in a high-speed mixer, wherein the stirring speed of the high-speed mixer is 2000 r/min, and the stirring temperature is 40 DEG CoAnd C, stirring for 10 min to obtain a mixed material, wherein the formula of the self-heating plastic is prepared from the following raw materials in parts by mass: 50 parts of high-density polyethylene, 20 parts of polybutylene terephthalate, 10 parts of carbon black, 8 parts of diatomite and 0.8 part of antioxidant;
step two, placing the mixed material obtained in the step one in a 1L internal mixer for internal mixing for 15 min, and discharging after completion, wherein the set temperatures of a first area, a second area and a third area of the internal mixer are all 160 DEGoC. The rotating speed is 50 min/r;
step three, the temperature of the material obtained after the mixing in the step two is 145 ℃ at the front and rear rollersoC, performing double-roller upper and lower sheet cutting, and obtaining long granules with the length of 2 mm;
step four, adding the long granules obtained in the step three into a double-screw extruder for secondary granulation to obtain the required granular special material of the self-heating plastic; wherein the temperature set values of all zones of the double-screw extruder are as follows: conveying section temperature 155oC, melting section 165oC, mixing section 168oC, exhaust section 168oC, homogenizing section 168oC。
Further, the particle size of the carbon black is 10 nm.
Further, the antioxidant is an antioxidant 1010.
Furthermore, the self-heating plastic is applied to the field of automobiles, and is particularly used for manufacturing a heating tube machine head, a sleeve heater or a combined heater.
[ example 2 ]
A preparation method and application of heating plastic comprise the following steps:
step one, weighing high-density polyethylene, polybutylene terephthalate, carbon black and diatom according to the dosage of the formulaStirring the soil and the antioxidant uniformly in a high-speed mixer, wherein the stirring speed of the high-speed mixer is 3000 r/min, and the stirring temperature is 40oAnd C, stirring for 8 min to obtain a mixed material, wherein the formula of the self-heating plastic is prepared from the following raw materials in parts by mass: 55 parts of high-density polyethylene, 25 parts of polybutylene terephthalate, 15 parts of carbon black, 10 parts of diatomite and 1.2 parts of antioxidant;
step two, placing the mixed material obtained in the step one in a 1L internal mixer for internal mixing for 15 min, and discharging after completion, wherein the set temperatures of a first area, a second area and a third area of the internal mixer are all 160 DEGoC. The rotating speed is 50 min/r;
step three, the temperature of the material obtained after the mixing in the step two is 145 ℃ at the front and rear rollersoC, performing double-roller upper and lower sheet cutting, and obtaining long granules with the length of 5 mm;
step four, adding the long granules obtained in the step three into a double-screw extruder for secondary granulation to obtain the required granular special material of the self-heating plastic; wherein the temperature set values of all zones of the double-screw extruder are as follows: conveying section temperature 157oC, melting section 166oC, a mixing section 169oC, exhaust section 169oC, homogenization section 169oC。
Further, the particle size of the carbon black is 15 nm.
Further, the antioxidant is an antioxidant 1076.
Furthermore, the self-heating plastic is applied to the field of automobiles, and is particularly used for manufacturing a heating tube machine head, a sleeve heater or a combined heater.
[ example 3 ]
A preparation method and application of heating plastic comprise the following steps:
step one, weighing high-density polyethylene, polybutylene terephthalate, carbon black, diatomite and an antioxidant according to the dosage of a formula, and uniformly stirring in a high-speed mixer, wherein the stirring speed of the high-speed mixer is 4000 r/min, and the stirring temperature is 40oC, stirring for 5 min to obtain a mixed material, wherein the formula of the self-heating plastic is prepared from the following raw materials in parts by mass: 60 parts of high-density polyethylene, 30 parts of polybutylene terephthalate, 20 parts of carbon black, 12 parts of diatomite and 1.5 parts of antioxidant;
step two, placing the mixed material obtained in the step one in a 1L internal mixer for internal mixing for 15 min, and discharging after completion, wherein the set temperatures of a first area, a second area and a third area of the internal mixer are all 160 DEGoC. The rotating speed is 50 min/r;
step three, the temperature of the material obtained after the mixing in the step two is 145 ℃ at the front and rear rollersoC, performing double-roller upper and lower sheet cutting, and obtaining long granules with the length of 8 mm;
step four, adding the long granules obtained in the step three into a double-screw extruder for secondary granulation to obtain the required granular special material of the self-heating plastic; wherein the temperature set values of all zones of the double-screw extruder are as follows: conveying section temperature 158oC, melting section 168oC, a mixing section 170oC, exhaust section 170oC, homogenizing section 170oC。
Further, the particle size of the carbon black is 20 nm.
Further, the antioxidant is an antioxidant 1076.
Furthermore, the self-heating plastic is applied to the field of automobiles, and is particularly used for manufacturing a heating tube machine head, a sleeve heater or a combined heater.
The above embodiments are only exemplary embodiments of the present invention, and are not intended to limit the present invention, and the scope of the present invention is defined by the claims. Various modifications and equivalents may be made by those skilled in the art within the spirit and scope of the present invention, and such modifications and equivalents should also be considered as falling within the scope of the present invention.
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