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Thermoplastic elastomer material for industrial/medical caster

A thermoplastic elastomer and caster technology, which is applied in the rubber field to achieve the effects of wide processing methods, high strength and wide hardness range

Inactive Publication Date: 2015-08-05
DONGGUAN LIHONG PLASTIC CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as people's requirements are getting higher and higher, the existing thermoplastic elastomer materials can no longer fully meet customers' higher requirements for load bearing, wear resistance, quietness, and shock resistance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] A thermoplastic elastomer material for industrial / medical casters provided in this embodiment, in parts by weight, its formula includes the following components:

[0041] Styrene-butadiene-styrene triblock copolymer 43%;

[0042] Paraffin oil 35%;

[0043] Polypropylene 20%;

[0044] Silicone 1%;

[0045] Tris(2,4-di-tert-butylphenyl)phosphite 0.15%;

[0046] Carbon Fiber 0.85%.

[0047] Wherein, the number average molecular weight of the styrene-butadiene-styrene triblock copolymer is 200,000, and the diameter of the carbon fiber is 50 nm-900 nm.

[0048] Its preparation method comprises the following steps:

[0049] The first step, pre-filling with oil: add styrene-butadiene-styrene triblock copolymer into paraffin oil at 80°C and stir for 2 hours, then place it for 48 hours for later use;

[0050] The second step, ingredients: add the pre-filled oil powder obtained in the first step to the mixture composed of polypropylene, silicone, tris (2,4-di-tert-butylphen...

Embodiment 2

[0054] A thermoplastic elastomer material for industrial / medical casters provided in this embodiment, in parts by weight, its formula includes the following components:

[0055] Styrene-isoprene-styrene triblock copolymer 48%;

[0056] Paraffin oil 30%;

[0057] Polypropylene 20%;

[0058] Silicone 0.8%;

[0059] n-octadecyl β-(3,5-di-tert-butyl-4-hydroxyphenyl)propionate 0.2%;

[0060] Glass powder 1%;

[0061] Among them, the number average molecular weight of the styrene-butadiene-styrene triblock copolymer is 150,000, and the particle diameter of the glass powder is 500nm-5μm.

[0062] Its preparation method comprises the following steps:

[0063] The first step, pre-filling with oil: add styrene-isoprene-styrene triblock copolymer into paraffin oil at 90°C and stir for 1 hour, then place it for 70 hours for later use;

[0064] The second step, ingredients: add the pre-filled oil powder obtained in the first step into a mixture of polypropylene, silicone, β-(3,5-di-t...

Embodiment 3

[0068] A thermoplastic elastomer material for industrial / medical casters provided in this embodiment, in parts by weight, its formula includes the following components:

[0069] Hydrogenated styrene-butadiene-styrene triblock copolymer 40%;

[0070] Paraffin oil 35%;

[0071] Polypropylene 22%;

[0072] Silicone 1.5%;

[0073] N,N'-bis-(3-(3,5-di-tert-butyl-4-hydroxyphenyl)propionyl)hexamethylenediamine 0.3%;

[0074] Fly ash powder 1.2%;

[0075] Among them, the number average molecular weight of the styrene-butadiene-styrene triblock copolymer is 120,000, and the particle diameter of the fly ash powder is 500nm-5μm.

[0076] Its preparation method comprises the following steps:

[0077] The first step, pre-filling with oil: add hydrogenated styrene-butadiene-styrene triblock copolymer into paraffin oil at 85°C and stir for 3 hours, then place it for 90 hours for later use;

[0078] The second step, ingredients: add the pre-filled oil powder obtained in the first step i...

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Abstract

The invention belongs to the technical field of rubber, and particularly relates to a thermoplastic elastomer material for an industrial / medical caster. The thermoplastic elastomer material comprises, in weight percent, 30%-60% of styrene block copolymer, 20%-50% of paraffin oil, 14%-30% of polypropylene, 0.1%-2% of silicone, 0.05%-0.5% of antioxidant and 0.1%-2% of sound absorption substances. Compared with the prior art, the thermoplastic elastomer material prepared by a formula and a process has various excellent performances such as high elasticity, high strength, high resilience, high wear resistance, aging resistance, oil resistance, weather resistance and fine sound absorption effect of traditional cross-linked vulcanized rubber, so that the caster produced by the formula and the process has excellent bearing capacity, wear resistance, higher elastic shockproof property and better mute effects.

Description

technical field [0001] The invention belongs to the technical field of rubber, in particular to a thermoplastic elastomer material for industrial / medical casters. Background technique [0002] Most of the current industrial / medical casters are made of thermoplastic elastomers coated with polypropylene (PP) through secondary injection molding. The basic functions of casters include load-bearing, wear-resistant, quiet, and shock-proof, in addition to rotating and running. The reason why Most of the current industrial / medical casters use thermoplastic elastomer materials to cover polypropylene (PP), because it can basically meet the above requirements. However, as people's requirements are getting higher and higher, the existing thermoplastic elastomer materials can no longer fully meet customers' higher requirements for load bearing, wear resistance, quietness, and shock resistance. [0003] In view of this, it is necessary to provide a thermoplastic elastomer material for in...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L53/02C08L91/06C08L23/12C08L83/04C08K13/04C08K5/526C08K5/134C08K3/40C08K7/06C08K5/18C08K7/14
Inventor 程勇
Owner DONGGUAN LIHONG PLASTIC CO LTD
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