Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Manufacturing method of self-lubricating piston for disposable syringe

A manufacturing method and a technology for a syringe, which are applied in the field of medical devices, can solve the problems of contamination and unpopularity of medicinal liquid, and achieve the effects of low compression permanent deformation rate, excellent biological performance indicators, and high hardness

Inactive Publication Date: 2018-09-04
SHANDONG JIHAI MEDICAL TECH +1
View PDF5 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] The prior art uses a lubricant to reduce the frictional resistance between the piston and the inner wall of the cylinder in the syringe. A commonly used lubricant is silicone oil, but this lubricant is not popular because it will disperse or Soluble in the liquid medicine, thereby contaminating the liquid medicine, so people have tried to find a way to make the syringe piston leak-proof without lubricant and make the piston slide easily. This attempt includes using various piston shapes

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] The manufacturing method of the self-lubricating piston for the disposable syringe of the present invention specifically comprises the following steps:

[0025] (1) Ingredients: In parts by weight, weigh 100 parts of medical silicone rubber, 8 parts of medical dimethyl silicone oil, 30 parts of fumed silica and vulcanizing agent 2,5-dimethyl-2,5-bis - 1 part of (tert-butyl peroxy) hexane for subsequent use;

[0026] (2) Mixing: uniformly mix medical silicone rubber with medical dimethyl silicone oil, fumed silica and vulcanizing agent by mechanical action to prepare mixed rubber;

[0027] The rubber compound is made by adding medical silicone rubber (raw rubber) to a double-roller rubber mixer or a closed kneader and gradually adding gas-phase white carbon black, medical dimethyl silicone oil, vulcanizing agent and other additives. The fast roller of the double-roller rubber mixing machine is behind, the higher speed ratio leads to faster mixing, and the lower speed ra...

Embodiment 2

[0034] The manufacturing method of the self-lubricating piston for the disposable syringe of the present invention specifically comprises the following steps:

[0035] (1) Ingredients: In parts by weight, weigh 100 parts of medical silicone rubber, 3 parts of medical dimethyl silicone oil, 10 parts of fumed silica and vulcanizing agent 2,5-dimethyl-2,5-bis -0.5 parts of (tertiary butyl peroxy) hexane for subsequent use;

[0036] (2) Mixing: uniformly mix medical silicone rubber with medical dimethyl silicone oil, fumed silica and vulcanizing agent by mechanical action to prepare mixed rubber;

[0037] The rubber compound is made by adding medical silicone rubber (raw rubber) to a double-roller rubber mixer or a closed kneader and gradually adding gas-phase white carbon black, medical dimethyl silicone oil, vulcanizing agent and other additives. The fast roller of the double-roller rubber mixing machine is behind, the higher speed ratio leads to faster mixing, and the lower sp...

Embodiment 3

[0044] The manufacturing method of the self-lubricating piston for the disposable syringe of the present invention specifically comprises the following steps:

[0045] (1) Ingredients: In parts by weight, weigh 100 parts of medical silicone rubber, 6.5 parts of medical dimethyl silicone oil, 20 parts of fumed silica and vulcanizing agent 2,5-dimethyl-2,5-bis -0.75 parts of (tertiary butyl peroxy) hexane for subsequent use;

[0046] (2) Mixing: uniformly mix medical silicone rubber with medical dimethyl silicone oil, fumed silica and vulcanizing agent by mechanical action to prepare mixed rubber;

[0047] The rubber compound is made by adding medical silicone rubber (raw rubber) to a double-roller rubber mixer or a closed kneader and gradually adding gas-phase white carbon black, medical dimethyl silicone oil, vulcanizing agent and other additives. The fast roller of the double-roller rubber mixing machine is behind, the higher speed ratio leads to faster mixing, and the lower...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

The invention belongs to the technical field of medical devices, and particularly relates to a manufacturing method of a self-lubricating piston for a disposable syringe. The method comprises the following steps: by weight, weighing 100 parts of medical silicone rubber, 3 to 8 parts of medical dimethicone, 10 to 30 parts of fumed silica, and 0.5 to 1 part of a vulcanizing agent for standby use; uniformly mixing the medical silicone rubber, the medical dimethicone, the fumed silica and the vulcanizing agent through a mechanical action so as to prepare a rubber compound; placing the prepared rubber compound into a slice discharging machine, and preparing rubber slices; placing the prepared rubber slices into a molding die, placing the die into a vulcanizing machine for vulcanizing, thus obtaining a semi-finished product; trimming the obtained semi-finished product through a special die and a punching machine; cleaning and drying, and packaging and warehousing after passing the inspection. The self-lubricating piston for the disposable syringe prepared by the invention is good in appearance, high in hardness, low in permanent compression deformation rate, and excellent in biological performance index.

Description

technical field [0001] The invention belongs to the technical field of medical devices, in particular to a method for making a self-lubricating piston for a disposable syringe. Background technique [0002] The prior art uses a lubricant to reduce the frictional resistance between the piston and the inner wall of the cylinder in the syringe. A commonly used lubricant is silicone oil, but this lubricant is not popular because it will disperse or Soluble in the liquid medicine, thereby contaminating the liquid medicine, so people have tried to find ways to make the syringe piston leak-proof without lubricant and make the piston slide easily. This attempt includes using various piston shapes. [0003] In the production process, in order to ensure that the syringe has excellent sliding performance, it is necessary to siliconize the piston and the inner barrel of the syringe; this siliconization is carried out in two steps, one is siliconization in the production process of the p...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C08L83/04C08K3/36C08K5/14B29C35/02A61M5/315
CPCA61M5/315A61M2205/0222A61M2207/00B29C35/02C08L83/04C08L2205/025C08K3/36C08K5/14
Inventor 李峰
Owner SHANDONG JIHAI MEDICAL TECH
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com