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A kind of thermoplastic micro-foam shock-absorbing material and preparation method thereof

A shock-absorbing material and thermoplastic technology, which is applied in the field of polymer material processing, can solve the problems of poor flexibility and dynamic mechanical properties, poor shock-absorbing effect, inability to fully satisfy high-speed rail shock-absorbing, unstable mechanical properties, etc., and achieve good interface compatibility , good performance, smooth appearance

Active Publication Date: 2018-03-06
南京清研新材料研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Micro-foamed thermoplastic elastomers have been applied to the shock absorption field of high-speed railways because of their good mechanical properties, excellent heat resistance, chemical resistance, weather resistance and aging resistance, but chemical foaming is commonly used There are no independent bubbles in the pure foamed thermoplastic elastomer prepared by the method, the bubbles are large, and there are chemical substances remaining, and its mechanical properties are unstable, which cannot fully meet the needs of high-speed rail shock absorption.
Existing rubber pads, EVA pads, and TPU pads have been difficult to meet the shock absorption requirements of the growing high-speed railway, and their service life is short; and engineering plastics have high strength, but their own flexibility and dynamic mechanical properties lead to their Poor shock absorption

Method used

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  • A kind of thermoplastic micro-foam shock-absorbing material and preparation method thereof
  • A kind of thermoplastic micro-foam shock-absorbing material and preparation method thereof
  • A kind of thermoplastic micro-foam shock-absorbing material and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0032] The preparation of thermoplastic micro-foaming shock-absorbing material in the present embodiment is as follows:

[0033] (1) Preparation of foam masterbatch: add 18 parts of azodicarbonamide, 50 parts of talc powder, 30 parts of ethylene-vinyl acetate copolymer, and 100 parts of low-density polyethylene into a high-speed mixer and mix well, then use a twin-screw extruder to Extrusion and granulation; the extrusion temperature is 140-145°C, and the screw speed is 40r / min;

[0034] (2) Preparation of base material: 100 parts of polypropylene, 50 parts of thermoplastic EPDM dynamically vulcanized elastomer (TPV), 15 parts of titanium dioxide, 1.2 parts of stearyl thiodipropionate, and 12 parts of low-density polyethylene , 1.3 parts of polyethylene wax were added to the mixer and mixed at high speed for 5 minutes, and then added to the twin-screw extruder for granulation; the speed was 210r / min, the temperature was set at 180-185°C, and the water-cooled strands were pelle...

Embodiment 2

[0038] The preparation of thermoplastic micro-foaming shock-absorbing material in the present embodiment is as follows:

[0039] (1) Preparation of foam masterbatch: add 15 parts of azodicarbonamide, 45 parts of talc powder, 35 parts of ethylene-vinyl acetate copolymer, and 100 parts of low-density polyethylene into a high-speed mixer and mix well, then use a twin-screw extruder to Extrusion and granulation; the extrusion temperature is 140-145°C, and the screw speed is 40r / min;

[0040] (2) Preparation of base material: 90 parts of polypropylene, 65 parts of thermoplastic styrene elastomer (TPS), 4 parts of mica and 4 parts of talcum powder, 4,4'-thio(6-tert-butyl-3- 1.0 parts of methyl phenol), 18 parts of ethylene-vinyl acetate copolymer, and 0.8 parts of stearic acid were added to the mixer and mixed at high speed for 8 minutes, and then added to the twin-screw extruder for granulation; the speed was 180r / min, and the temperature setting 185~190℃, the water-cooled strands...

Embodiment 3

[0044] The preparation of thermoplastic micro-foaming shock-absorbing material in the present embodiment is as follows:

[0045] (1) Preparation of foam masterbatch: add 20 parts of azodicarbonamide, 60 parts of talc powder, 45 parts of ethylene-vinyl acetate copolymer, and 100 parts of low-density polyethylene into a high-speed mixer and mix well, then use a twin-screw extruder to Extrusion and granulation; the extrusion temperature is 145-150°C, and the screw speed is 40r / min;

[0046](2) Preparation of base material: 80 parts of polypropylene, 70 parts of thermoplastic polyester elastomer (TPEE), 12 parts of titanium dioxide, [β-(3,5 di-tert-butyl 4-hydroxy-phenyl) propionic acid] 1.5 parts of pentaerythritol ester, 20 parts of ethylene-vinyl acetate copolymer, and 1.2 parts of polyethylene wax were added to the mixer and mixed at high speed for 6 minutes, and then added to the twin-screw extruder for granulation; the speed was 240r / min, and the temperature was set at 185 ...

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Abstract

The invention belongs to the technical field of polymer material processing, and relates to a thermoplastic micro-foaming damping material and a preparation method thereof. The damping material is composed of the following components in parts by weight: 80 to 100 parts of polypropylene, 50 to 80 parts of thermoplastic elastomer, 8 to 15 parts of filling materials, 1 to 2 parts of antioxidant, 12 to 25 parts of viscosity adjusting agent, 10 to 18 parts of foaming master batch, and 0.8 to 1.5 parts of dispersant. Polypropylene is co-modified by the thermoplastic elastomer and a viscosity adjusting agent to prepare the thermoplastic micro-foaming damping material so as to achieve the goals of toughening and strengthening; and at the same time, foaming master batch is added for injection foaming, so the foaming is uniform and the product appearance is beautiful. The preparation method has the advantages of simple formula, easily available raw materials, low cost, simple operation, controllable technology conditions, low operation cost, high production efficiency, and good product performance. The thermoplastic micro-foaming damping material is widely used in industries such as package industry, construction industry, automobile industry, aerospace industry, and sports equipment industry.

Description

technical field [0001] The invention belongs to the technical field of polymer material processing, and relates to a thermoplastic micro-foaming shock-absorbing material and a preparation method thereof. Background technique [0002] Microfoaming material refers to a polymer material as a matrix, which contains a porous polymer material with a cell size ranging from less than one micron to tens of microns. Foamed plastics prepared by conventional physical or chemical foaming methods usually do not belong to this category due to their large pore size. Compared with the millimeter-scale cells of general foamed plastics, the cells of microfoamed polymers are much smaller. The cell density is much larger, so it is called microfoamed polymer material. Micro-foamed thermoplastic elastomers have been applied to the shock absorption field of high-speed railways because of their good mechanical properties, excellent heat resistance, chemical resistance, weather resistance and aging ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08L23/14C08K3/34C08J9/10C08J3/22C08L67/02C08L23/16C08L53/02C08L23/06C08L23/08B29C45/76
CPCB29C45/76B29C2945/76498B29C2945/76531B29C2945/76551C08J3/226C08J9/0061C08J9/103C08J2203/04C08J2323/14C08L23/14C08L2203/14C08L2205/025C08L2205/035C08L2207/04C08L2207/066C08L23/16C08L23/06C08L23/0853C08L53/02C08L67/00
Inventor 杨桂生郭学林
Owner 南京清研新材料研究院有限公司
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