High-temperature-boiling-resistant low-temperature-toughness polyolefin plastic as well as preparation method and application thereof
A low-temperature toughness and polyolefin technology, applied in the field of plastic packaging, can solve problems such as poor component compatibility, and achieve the effects of improving heat resistance, improving compatibility, and excellent mechanical strength
Active Publication Date: 2021-03-19
FOSHAN SOUTHERN PACKAGING
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Problems solved by technology
[0006] The purpose of the present invention is to overcome the defects of poor compatibility of components in existing high-temperature cooking-resistant and low-temperature-resistant materials, and provide a low-temperature tough polyolefin plastic with good high-temperature cooking resistance
Method used
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Embodiment 1～8
[0067] This embodiment provides a series of low temperature tough polyolefin plastics resistant to high temperature cooking.
[0068] According to the formula in Table 4, polypropylene, polyethylene, N-alkylmaleimide grafted polyethylene and bismaleimide modified polysiloxane copolymerized polyurethane elastomer were put into the mixer for Mix until uniform, then extrude and granulate through a twin-screw extruder at a temperature of 200-260° C. (see Table 3 for details) and a rotational speed of 100-150 rpm.
[0069] Table 3 Processing temperature (° C.) in each zone of the twin-screw extruder of Examples 1 to 8
[0070] District I Zone II Zone III District IV Temperature setting / ℃ 260 260 230 210
[0071] .
[0072] Table 4 Low temperature toughness polyolefin plastic raw materials and dosage (g) resistant to high temperature cooking
[0073]
[0074]
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Abstract
The invention provides a high-temperature-boiling-resistant low-temperature-toughness polyolefin plastic as well as a preparation method and application thereof. The high-temperature-boiling-resistantlow-temperature-toughness polyolefin plastic is prepared from polypropylene and polyethylene, and Nalkyl maleimide grafted polyethylene is added as a compatilizer, so that not only is the compatibility of the polypropylene and the polyethylene improved, but also the heat resistance of the material can be improved by the Nalkyl maleimide; and in addition, a bismaleimide-modified polysiloxane copolymerized polyurethane elastomer and polyethylene are added to synergistically toughen the polypropylene, and meanwhile, the heat resistance of the material can be improved. According to the high-temperature-boiling-resistant low-temperature-toughness polyolefin plastic provided by the invention, the polypropylene is used as a continuous phase, the polyethylene is used as a dispersion phase, and asystem penetrated by a polysiloxane copolymerized polyurethane network does not deform after being boiled at the high temperature of 121 DEG C for 30 minutes, does not fall off and is not damaged at the low temperature of -30 DEG C and has excellent tensile and bending properties.
Description
technical field [0001] The invention belongs to the technical field of plastic packaging, and in particular relates to a low-temperature tough polyolefin plastic resistant to high-temperature cooking and its preparation method and application. Background technique [0002] With the increasing emphasis on food safety, food packaging needs to undergo strict high-temperature sterilization and low-temperature storage before use, which puts forward higher requirements for high-temperature cooking resistance and low-temperature drop resistance of food packaging. At present, plastic packaging for food is generally required to withstand cooking at 121°C for 30 minutes to kill bacteria; after cooking, the packaging should be cooled at 1-5°C and stored in a low-temperature environment of -30°C. [0003] Polypropylene (PP) is rich in sources, non-toxic, heat-resistant, and easy to process. Its melting temperature is about 160-170°C. It can withstand high-temperature cooking at 121°C fo...
Claims
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IPC IPC(8): C08L23/12C08L23/06C08L51/06C08L75/04
CPCC08L23/12C08L2201/08C08L2207/062C08L2207/068C08L2205/02C08L2205/035C08L23/06C08L51/06C08L75/04
Inventor 张桂祥刘长来岑锐鸿
Owner FOSHAN SOUTHERN PACKAGING
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