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Polyethylene heat-insulating foamed sheet and preparation method thereof
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A foamed sheet and polyethylene technology, which is applied in the field of functional materials, can solve the problems of discarding, single means of thermal insulation, environmental pollution, etc., and achieve the effect of reducing the thermal conductivity rate
Inactive Publication Date: 2020-05-05
HEFEI GENIUS NEW MATERIALS
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Problems solved by technology
Usually, some thermal insulation linings are added to the inside of the packaging box. These materials are usually materials such as foamed plastics and glass fiber mats, and the means of thermal insulation are relatively simple.
Moreover, although this type of material can be reused, it is usually discarded after use, causing serious pollution to the environment, and it is strictly controlled when the product is exported to foreign countries.
Method used
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Embodiment 1
[0023] Add 50 parts of high-density polyethylene, 30 parts of paraffin, 20 parts of PBAT, 5 parts of compatibilizer, 3 parts of foaming agent, and 0.5 parts of antioxidant into the high-speed mixer, mix at low speed for 3 minutes, and then mix the uniform material Put it into a twin-screw plate extruder, knead, extrude, and cool to obtain the final product. Wherein the extrusion temperature of each extrusion zone in the twin-screw extruder is 150°C, 160°C, 170°C, 180°C, 180°C, 180°C, 180°C, 180°C, 180°C respectively. The product performance is shown in Table 1.
Embodiment 2
[0025] Add 60 parts of high-density polyethylene, 25 parts of paraffin, 15 parts of PBAT, 4 parts of compatibilizer, 4 parts of foaming agent, and 0.5 parts of antioxidant into the high-speed mixer, mix at low speed for 3 minutes, and then mix the uniform material Put it into a twin-screw plate extruder, knead, extrude, and cool to obtain the final product. Wherein the extrusion temperature of each extrusion zone in the twin-screw extruder is 155°C, 165°C, 175°C, 185°C, 185°C, 185°C, 185°C, 185°C, 185°C respectively. The product performance is shown in Table 1.
Embodiment 3
[0027] Add 70 parts of high-density polyethylene, 20 parts of paraffin, 10 parts of PBAT, 3 parts of compatibilizer, 5 parts of foaming agent, and 0.5 parts of antioxidant into the high-speed mixer, mix at low speed for 3 minutes, and then mix the uniform material Put it into a twin-screw plate extruder, knead, extrude, and cool to obtain the final product. Wherein the extrusion temperature of each extrusion zone in the twin-screw extruder is 160°C, 170°C, 180°C, 190°C, 190°C, 190°C, 190°C, 190°C, 190°C respectively. The product performance is shown in Table 1.
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Abstract
The invention discloses a polyethylene heat-insulating foamed sheet and a preparation method thereof. The polyethylene heat-insulating foamed sheet is prepared from the following raw material components (by weight): 50-70 parts of high-density polyethylene, 20-30 parts of paraffin, 10-20 parts of PBAT, 3-5 parts of a compatilizer, 3-5 parts of a foaming agent and 0.5 part of an antioxidant. According to the polyethylene heat-insulating foamed sheet provided by the invention, the microcrystallinewax with the phase change thermal storage function is added into the high-density polyethylene matrix, and the microcrystallinewax is utilized to generate phase change heat absorption and heat release along with the temperature change so as to control the temperature of the material not to be greatly changed along with the change of the external temperature. Meanwhile, due to the foaming structure of the material, the overall heat conduction rate is greatly reduced, and good heat insulation and heat preservation effects are achieved. In addition, due to the addition of PBAT, the material has a partial degradation function, and white pollution flooding is prevented.
Description
technical field [0001] The invention relates to the field of functional materials, in particular to a polyethylene heat-insulating foam board and a preparation method thereof. Background technique [0002] With the rapid development of the e-commerce industry in recent years, the diversity of e-commerce products has put forward various demands for the corresponding transportation packaging industry. Especially for fresh food, food, precision electronics, cosmetics and chemicals, since they need heat preservation or heat insulation conditions to prevent deterioration during transportation, in a limited transportation environment, the packaging materials are proposed. higher requirement. Usually, some thermal insulation linings are added to the inside of the packaging box. These materials are usually materials such as foamed plastics and glass fiber mats, and the means of thermal insulation are relatively simple. Moreover, although this type of material can be reused, it is ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information
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