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TPE (thermoplastic elastomer) for syringe piston and preparation method thereof

The technology of a syringe and a piston is applied in the field of TPE for a syringe piston and its preparation, which can solve the problems that the surface is easily broken, the use of liquid or gas in the syringe is affected, and the liquid of the syringe is polluted, and the effect of good puncture is achieved.

Active Publication Date: 2018-08-21
慈溪市山今高分子塑料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The current piston is made of TPE. During use, the side of the piston slides and seals with the inner wall of the syringe. When the piston is pulled, the side of the piston is squeezed, stretched and twisted, and its surface is prone to breakage and damage The fracture surface produces fine debris, which pollutes the liquid in the syringe and affects the use of liquid or gas in the syringe

Method used

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  • TPE (thermoplastic elastomer) for syringe piston and preparation method thereof
  • TPE (thermoplastic elastomer) for syringe piston and preparation method thereof
  • TPE (thermoplastic elastomer) for syringe piston and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1A

[0048] S1: Premix 5 parts of PP, 20 parts of white oil, 18 parts of SEBS, 0.3 parts of antibacterial agent and 8 parts of reinforcing agent in a high-speed mixer, and control the premixing at 625r / min for 40 minutes to obtain the added mixture;

[0049] S2: adding the added mixture obtained in S1 into a twin-screw extruder with a length-to-diameter ratio of 42:1 for melt extrusion to obtain the added mixture particles;

[0050] S3: Add the mixed particles obtained in S2 and 10 parts of PP, 32 parts of SEBS, 4 parts of hydrogenated petroleum resin, 40 parts of white oil, 6 parts of silicone masterbatch and 1 part of silane coupling agent in the ratio of parts by mass. Mix at 625r / min in the high mixer, and control to mix at 758r / min for 2 hours to obtain molten plastic;

[0051] S4: Put the molten plastic obtained by mixing S3 into a twin-screw extruder with an aspect ratio of 44:1 for melt extrusion to obtain TPE plastic particles for syringe pistons.

[0052]The antibacteria...

Embodiment 1B-1F

[0054] On the basis of Example 1A, the mass parts of the amount of raw materials were changed to obtain multiple sets of TPE. The raw material consumption is as follows.

[0055]

[0056]

[0057] The above-mentioned nano-titanium dioxide antibacterial agent selects the powder product of AMT-600 from Japan Titanium Division (TAYCA).

Embodiment 2A-2C

[0073] Improvement was made on the basis of Example 1A, heating was performed during premixing in S1, wherein the temperature of Example 2A was controlled at 60°C, the temperature of Example 2B was controlled at 65°C, and the temperature of Example 2C was controlled at 68°C.

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Abstract

The invention relates to a thermoplastic elastomer (TPE) material, and discloses a TPE for a syringe piston and a preparation method of the TPE. The technical scheme is as follows: the TPE for the syringe piston comprises the following raw materials by mass fraction: 15-25 parts of PP, 50-73 parts of SEBS, 4-10 parts of hydrogenated petroleum resin, 60-100 parts of white oil, 1-6 parts of siliconemaster batch, 0.3-0.7 part of antibacterial agent, 8-12 parts of reinforcing agent and 1-3 parts of silane coupling agent, the antibacterial agent is one or two of inorganic silver-loaded antibacterial agent and nanometer titania antibacterial agent, the reinforcing agent is prepared from a carbon black and a fumed silica, and the TPE achieves the effects that the TPE does not fracture easily when being extruded, stretched and twisted by external force, and the crushed material and the fine powder on the fracture surface are reduced after the fracturing.

Description

technical field [0001] The invention relates to a modified TPE plastic, in particular to a TPE for a syringe plunger and a preparation method thereof. Background technique [0002] A syringe is a common medical device that can be used to extract or inject gas or liquid into medical equipment and containers, such as some scientific instruments in chromatography that inject through rubber septums. The syringe comprises a syringe, a push rod inserted into the syringe and a piston fixed at one end of the push rod inserted into the syringe. The piston and the inner wall of the syringe are slidably sealed to prevent the liquid or gas in the syringe from leaking out during the pulling of the push rod. [0003] The current piston is made of TPE. During use, the side of the piston slides and seals with the inner wall of the syringe. When the piston is pulled, the side of the piston is squeezed, stretched and twisted, and its surface is prone to breakage and damage The fracture surf...

Claims

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Application Information

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IPC IPC(8): C08L91/06C08L53/02C08L23/12C08L57/02C08L83/04C08K13/06C08K9/06C08K9/12C08K3/04C08K3/36C08K3/08C08K3/22C08K5/5435
CPCC08K2003/0806C08K2003/2241C08K2201/011C08L91/06C08L2205/035C08L53/025C08L23/12C08L57/02C08L83/04C08K13/06C08K9/06C08K9/12C08K3/04C08K3/36C08K3/08C08K3/22C08K5/5435
Inventor 郭运华岑建达
Owner 慈溪市山今高分子塑料有限公司
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