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High-resilience wave-absorbing foaming material and preparation method thereof

A foaming material and high-resilience technology, applied in the field of foaming materials, can solve problems such as environmental pollution, poor resilience performance, hazards, etc., and achieve the effect of improving uniformity and stability, and uniform cell structure

Active Publication Date: 2022-08-09
CHAMBROAD CHEM IND RES INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the more common foamed plastics are polystyrene, polyethylene, polyvinyl chloride, polyurethane, etc., but the above-mentioned foamed materials are non-elastomers, which have poor performance in terms of resilience, and the rebound rate is usually lower than 30%. The environment also causes certain pollution and hazards, and there are certain shortcomings in functional applications

Method used

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  • High-resilience wave-absorbing foaming material and preparation method thereof
  • High-resilience wave-absorbing foaming material and preparation method thereof
  • High-resilience wave-absorbing foaming material and preparation method thereof

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preparation example Construction

[0045] The present invention also provides a method for preparing a resilient wave-absorbing foam material, comprising the following steps:

[0046] A) After mixing PBAT resin with thermoplastic elastomer, bridging agent, anti-hydrolysis agent, cell regulator and wave absorbing aid, sequentially melt, extrude, calender and shape to obtain slab;

[0047] B) putting the slab into the mold cavity, and carrying out supercritical foaming to obtain an initial foaming material;

[0048] C) hot-pressing and shaping the initial foamed material to obtain a high-resilience wave-absorbing foamed material.

[0049] In the present invention, the types and amounts of the PBAT resin, thermoplastic elastomer, bridging agent, anti-hydrolysis agent, cell regulator and wave absorbing aid are the same as those of the PBAT resin, thermoplastic elastomer, bridging agent described above The types and amounts of the agent, anti-hydrolysis agent, cell regulator and wave absorbing auxiliary are the sam...

Embodiment 1

[0069] (1) After mixing 40 parts of PBAT resin with 60 parts of ethylene-vinyl acetate copolymer, 1 part of nitrile rubber, 0.5 part of polycarbodiimide, 0.2 part of light calcium carbonate, and 5 parts of carbon fiber in a high-speed mixer, The material is melted in the extruder, the melting temperature is 160 ℃, the extruder speed is 120r / min, the molten material is formed into a slab in the slit head, calendered by a three-roll tablet machine, cooled and shaped, and cut. into a plate with a thickness of 4mm.

[0070] (2) Turn on the oil bath heating system of the molding foaming equipment, raise the temperature to 80°C, open the mold cavity, put the molded plate cut in step S1 into the mold cavity, close the mold cavity, and send the mold cavity to the mold cavity through the booster pump. Supercritical carbon dioxide gas was pumped into the cavity to make the pressure in the mold cavity 20MPa, and the pressure was maintained for 1 hour, and then the pressure in the mold ca...

Embodiment 2

[0073] (1) Mix 60 parts of PBAT resin with 40 parts of polyurethane elastomer, 0.5 part of ethylene-methyl methacrylate copolymer, 0.2 part of carbodiimide, 0.5 part of white carbon black, and 10 parts of polyaniline in a high-speed mixer. Then, melt the material in the extruder, the melting temperature is 140°C, the extruder speed is 150r / min, the molten material is formed into a slab in the slit die, calendered by a three-roll tablet machine, cooled and shaped , cut into sheets with a thickness of 3mm.

[0074] (2) Turn on the oil bath heating system of the molding foaming equipment, raise the temperature to 90°C, open the mold cavity, put the molded plate cut in step S1 into the mold cavity, close the mold cavity, and send the mold cavity to the mold cavity through the booster pump. Supercritical carbon dioxide and supercritical nitrogen were pumped into the cavity successively, so that the pressure in the mold cavity was 15MPa, and the pressure was maintained for 1.5h, and t...

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Abstract

The invention provides a high-resilience wave-absorbing foaming material. The high-resilience wave-absorbing foaming material is prepared from the following components in parts by weight: 20-95 parts of PBAT resin; 5-80 parts of a thermoplastic elastomer; 0.5 to 10 parts of a bridging agent; 0.2 to 3 parts of an anti-hydrolysis agent; 0.1 to 2 parts of a cell regulator; 2-20 parts of a wave-absorbing auxiliary agent; the bridging agent is one or more of an ethylene-methyl methacrylate copolymer, nitrile rubber, vinyltriethoxysilane and a styrene-glycidyl methacrylate copolymer. The high-resilience wave-absorbing foaming material disclosed by the invention has excellent properties of degradability, high resilience and wave absorption. The invention also provides a preparation method of the high-resilience wave-absorbing foaming material.

Description

technical field [0001] The invention belongs to the technical field of foam materials, and in particular relates to a high-resilience wave-absorbing foam material and a preparation method thereof. Background technique [0002] Foamed plastics have excellent properties such as light weight, heat insulation, sound absorption, shock absorption, buffering, energy storage, etc., and are widely used in packaging materials, transportation, architectural decoration, sports and leisure, catering logistics and other fields. At present, the more common foamed plastics are polystyrene, polyethylene, polyvinyl chloride, polyurethane, etc., but the above-mentioned foamed materials are non-elastomers, which have poor performance in terms of resilience, and the resilience rate is usually lower than 30%. The environment also causes certain pollution and harm, and there are certain shortcomings in functional applications. [0003] In the fields of communication equipment, network terminals, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/02C08L23/08C08L75/04C08L79/02C08L9/02C08L25/14C08L53/02C08L49/00C08K3/26C08K7/06C08K7/26C08K3/34C08K3/04C08J9/12
CPCC08J9/122C08J9/0095C08J9/0085C08J9/0071C08J9/0066C08J9/0061C08J2203/06C08J2203/08C08J2323/08C08J2467/02C08J2409/02C08J2367/02C08J2475/04C08J2423/08C08J2479/02C08J2353/02C08J2425/14C08J2449/00Y02P20/54
Inventor 孙浩杰崔丽云王奇杨熙舒孟鑫吴清华贾俊雪吴文雷
Owner CHAMBROAD CHEM IND RES INST CO LTD
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