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Thermoplastic polyester elastomer closed-cell micro-foaming material, preparing method thereof and vibration absorbing usage

A thermoplastic polyester and elastomer technology, applied in coatings and other directions, can solve the problems of low service life, difficult to meet the requirements of shock absorption, poor shock absorption effect, etc., to achieve high yield, good shape memory function, and production efficiency high effect

Inactive Publication Date: 2009-10-07
河北北田工程塑料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] As a railway sleeper pad for shock absorption, it is located between the rails and the sleepers to bear the impact and extrusion load produced by each wheel of the passing train when it moves on the sleeper pad and the sleepers. The existing sleeper pads are mostly made of rubber, EVA (ethylene-ethylene- Vinyl acetate copolymer (a kind of hot melt adhesive) or TPU (an adhesive thermoplastic polyurethane resin) made of rubber has good elasticity and shock absorption performance but its service life is low; while engineering plastics have high strength but Its own flexibility and dynamic mechanical properties lead to poor shock absorption effect
With the rapid development of modern high-speed railways, the high-speed operation of trains puts forward higher requirements for the shock absorption performance of high-speed railways. The original rubber pads, EVA pads, and TPU pads have been difficult to meet the shock absorption requirements of the growing high-speed railways.

Method used

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  • Thermoplastic polyester elastomer closed-cell micro-foaming material, preparing method thereof and vibration absorbing usage
  • Thermoplastic polyester elastomer closed-cell micro-foaming material, preparing method thereof and vibration absorbing usage
  • Thermoplastic polyester elastomer closed-cell micro-foaming material, preparing method thereof and vibration absorbing usage

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Experimental program
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Embodiment Construction

[0046]

[0047] Embodiments 1-6 are respectively a kind of TPEE closed-cell micro-foaming material, and the composition of raw materials for making active ingredients is as shown in the above table.

[0048] The preparation method is to mix and granulate TPEE, titanium dioxide, antioxidant 1010, and a viscosity modifier to obtain a base material, and then mix the base material with EVA foaming master batches for injection molding and foaming to obtain a product. The obtained TPEE closed-cell micro-foaming material is used for processing shock-absorbing pads or / and shock-absorbing pads, especially rail tie pads and sleeper pads.

[0049] As the TPEE closed-cell micro-foaming material processing technology of embodiment 1 is:

[0050] (1) Prepare base material:

[0051] TPEE, titanium dioxide, antioxidant 1010, viscosity regulator mixing → twin-screw extrusion granulation → base material;

[0052] (2) Foaming:

[0053] The base material is mixed with EVA foam masterbatch →...

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Abstract

The present invention discloses a thermoplastic polyester elastomer closed-cell micro-foaming material, a preparing method and a vibration absorbing usage. The thermoplastic polyester elastomer closed-cell micro-foaming material is prepared by the following steps: preparing the base stock by mixing TPE, filling agent, viscosity controlling agent and antioxidant and granulating, and then after adding into foaming master batch, executing molding injection and foaming. The thermoplastic polyester elastomer closed-cell micro-foaming material of the invention has the advantages of vibration absorbing usage of product, simple formula and available raw material, low cost; simple operation of preparing method, easy control of technological condition, low operation cost, high production efficiency, excellent performance and stable quality of product. Furthermore the product can be used for manufacturing vibration absorbing washer and vibration absorbing backing plate.

Description

technical field [0001] The invention relates to a polymer modified material, in particular to a thermoplastic polyester elastomer closed-cell micro-foaming material, a preparation method thereof, and a shock-absorbing application. Background technique [0002] As a railway sleeper pad for shock absorption, it is located between the rails and the sleepers to bear the impact and extrusion load produced by each wheel of the passing train when it moves on the sleeper pad and the sleepers. The existing sleeper pads are mostly made of rubber, EVA (ethylene-ethylene- Vinyl acetate copolymer (a kind of hot melt adhesive) or TPU (an adhesive thermoplastic polyurethane resin) made of rubber has good elasticity and shock absorption performance but its service life is low; while engineering plastics have high strength but Its own flexibility and dynamic mechanical properties lead to poor shock absorption effect. With the rapid development of modern high-speed railways, the high-speed o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L67/00C08L71/00C08K3/22C08J9/04B29C45/00
Inventor 苑会林韩钢韩继红
Owner 河北北田工程塑料有限公司
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