Flame-treatment-free high-foaming-ratio polypropylene foam material and preparation method thereof
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A technology for polypropylene materials and foaming materials, which is applied in the field of flame-free treatment of high-expansion-ratio polypropylene foaming materials and its preparation, can solve problems such as poor compatibility, loss of use functions, and cell collapse, and achieve low cost, Good hydrophilicity and uniform cell density
Active Publication Date: 2022-02-15
NANJING JULONG SCI&TECH CO LTD
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[0005] The purpose of the present invention is to provide a non-flame treatment high expansion ratio polypropylene foam material and its preparation method, by modifying the polypropylene material and foaming with supercritical fluid at the same time, the surface tension and peel strength are significantly enhanced High-expansion ratio polypropylene foam material solves the problem that when high-expansion ratio polypropylene materials are bonded to adhesives, due to poor compatibility between the two, flame treatment is required for bonding, resulting in cell collapse and loss of use function.
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Embodiment 1
[0034] A preparation method for non-flame treatment of high expansion ratio polypropylene foam material, comprising the following steps:
[0035] (1) Weigh the following components by weight: 91 parts of polypropylene, 5 parts of 5000 mesh talcum powder, 2 parts of POE-g-MAH, 2 parts of amphiphilic block copolymer, 0.5 part of antioxidant, nucleating 0.2 parts of antistatic agent, 0.3 parts of antistatic agent, blend the above raw materials in a low-speed mixer for 20 minutes, and add them to the twin-screw extruder. 200°C, 200°C, 200°C, 205°C, 205°C, 205°C, 205°C, 210°C, 210°C, the machine head is 200°C, the mixed material is melted and plasticized, kneaded, extruded, cooled, cut granules and dried to obtain a modified polypropylene material;
[0036] (2) Extrude the modified polypropylene material into a certain volume of sheet material through a single screw, put the sheet material into a mold suitable for sheet material foaming, and control the foaming process parameters ...
Embodiment 2
[0038] The difference between Example 2 and Example 1 is that when the modified polypropylene material is prepared in step (1), 5 parts of talcum powder with a mesh size of not less than 7000 meshes is selected as the filler, and the contents of other components and process parameters remain unchanged.
Embodiment 3
[0040] The difference between Example 3 and Example 1 is that when the modified polypropylene material is prepared in step (1), the parts by weight of polypropylene are 89 parts, the parts by weight of the amphiphilic block copolymer are 3 parts, and the content of other components and process parameters remain unchanged.
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Abstract
The invention provides a flame-treatment-free high-foaming-ratio polypropylene foam material and a preparation method thereof, and relates to the technical field of polymer foam materials. The foaming material is obtained by performing supercritical fluid foaming on a modified polypropylene material, and the modified polypropylene material comprises the following components in parts by weight: 70-95 parts of polypropylene; 3-10 parts of a filler; 1-5 parts of a polar auxiliary agent; 1-5 parts of an amphiphilic block copolymer; 1-5 parts of other auxiliary agents. According to the flame-treatment-free high-foaming-ratio polypropylene foam material obtained by foaming through the supercritical fluid technology, the foaming ratio is higher than 25 times, the density is lower than 0.04 g / cm <3>, foam holes are fine and uniform, the foam hole density is high, the flame-treatment-free high-foaming-ratio polypropylene foam material can have good bonding capacity with bonding glue without flame treatment, the problem that the high-foaming-ratio polypropylene material cannot be subjected to flame treatment to ensure that the high-foaming-ratio polypropylene material can be well bonded with glue is fully solved, and the application range is wide.
Description
technical field [0001] The invention relates to the technical field of polymer foaming materials, in particular to a non-flame treatment high expansion ratio polypropylene foaming material and a preparation method thereof. Background technique [0002] In recent years, with the intensification of the energy crisis, researchers at home and abroad believe that lightweight materials are an important way to solve the energy crisis. As the most intuitive product of light weight, microcellular foaming materials are widely used in aviation industry, agriculture, automobile industry, electronic appliances, packaging industry and other fields. Microcellular foamed materials have excellent physical and mechanical properties while reducing weight, such as good dimensional stability, processability, mechanical properties and thermal properties. [0003] Microcellular foaming materials are mainly divided into physical foaming materials and chemical foaming materials according to the typ...
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