Preparation process of silicification-free rubber plug

A preparation process and technology for rubber stoppers, which are applied in the field of preparation of silicone-free rubber stoppers, can solve the problems of uniform coating on the surface of unfavorable rubber stoppers, the film is easy to fall off, and the adhesion of the film material is not strong. Good aging performance, excellent chemical corrosion resistance and temperature resistance, the effect of solving friction and bottle mouth jam

Active Publication Date: 2018-01-26
江阴市海华橡塑有限公司
View PDF4 Cites 8 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the above-mentioned solution does not completely solve the friction between the rubber stopper and the sub-packaging track and the problems of the neck of the rubber stopper and the bottleneck of the bottle mouth
The improved technical solution of siliconization-free also includes covering the surface of the rubber stopper or covering the neck with a film, but the film-coated rubber stopper is mainly used for pharmaceutical packaging with high pH, ​​and it is prone to weak adhesion of the film material, and the film is easy to fall off. The film material has poor elasticity, and the film-coated rubber plug has high hardness, which is prone to problems such as poor self-sealing and poor acupuncture performa

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

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Preparation process of silicification-free rubber plug

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0021] Example 1

[0022] Example 1 The preparation process of the silicone-free rubber stopper includes the steps of mixing rubber, rubber sheeting, compression vulcanization forming, slitting, cleaning and drying, and packaging. It also includes sequential coating of polydimethylmethylmethacrylate on the surface of the rubber stopper after cleaning and drying. Base siloxane prepolymer solution and polyvinylidene fluoride resin dispersion and coating drying and curing steps;

[0023] Among them, the main components of the polydimethylsiloxane prepolymer solution are end-capped polydimethylsiloxane prepolymer, silane crosslinking agent and organic solvent;

[0024] The main composition of the polyvinylidene fluoride resin dispersion is a polyvinylidene fluoride resin emulsion with a solid content of 5 to 15% and a silicone rubber catalyst.

[0025] The composition of the polydimethylsiloxane prepolymer solution is 100 parts of the hydroxy-terminated polydimethylsiloxane of the rubber ...

Example Embodiment

[0027] Example 2-3

Example Embodiment

[0028] The difference between Example 2 and Example 1 is that it includes 1 part of blocked polydimethylsiloxane prepolymer, 0.5 part of silane crosslinking agent and 100 parts of organic solvent A in parts by weight, and polyvinylidene fluoride resin is dispersed. The weight percentage of the silicone rubber catalyst in the liquid is 0.001%; ​​the main composition of the polyvinylidene fluoride resin dispersion liquid is a polyvinylidene fluoride resin emulsion with a solid content of 15% and a silicone rubber catalyst. The silicone rubber in the polyvinylidene fluoride resin dispersion liquid The weight percentage of the catalyst is 0.001%.

[0029] The drying temperature of the coating is 160°C, and the coating curing includes two steps of room temperature curing and high temperature curing in sequence. The room temperature curing time is 36h, the high temperature curing temperature is 200°C, and the high temperature curing time is 5-10 minutes. The organic solvent A is aceton...

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

PropertyMeasurementUnit
Thicknessaaaaaaaaaa
Thicknessaaaaaaaaaa
Login to view more

Abstract

The invention discloses a preparation process of a silicification-free rubber plug. The preparation method comprises the steps of compounding rubber, flaking rubber, molding, volcanizing and molding,cutting, washing and drying, and packaging, and further comprises the steps of sequentially coating a dimethylsiloxane prepolymer solution and a polyvinylidene fluoride resin dispersion on the surfaceof washed and dried rubber plug, and drying and curing coating layers, wherein the dimethylsiloxane prepolymer solution is mainly prepared from the following components in parts by weight: 1-5.5 parts of dimethylsiloxane prepolymer, 0.2-0.5 part of silane crosslinking agent, 100 parts of organic solvent A, and the polyvinylidene fluoride resin dispersion is mainly prepared from polyvinylidene fluoride resin emulsion containing 5-15% of solid and silicon rubber catalyst. The cured rubber plug has a compound coating layer, low surface friction coefficient, good anti-ultraviolet performance, chemical resistance and anti-aging performance, and the silicification process in preparation of the rubber plug is prevented.

Description

technical field [0001] The invention relates to the technical field of production of medicinal rubber stoppers, in particular to a preparation process of a silicone-free rubber stopper. Background technique [0002] Due to the high surface friction coefficient of butyl rubber plugs, it is necessary to add emulsified silicone oil and silicone oil for siliconization during the manufacturing process. The degree of silicification of rubber stoppers is also a key factor affecting the probability of filling and stoppering in pharmaceutical factories. The frictional resistance between non-siliconized and siliconized butyl rubber stoppers and dispensing tracks is 50-100 times different. However, the technical defect brought about by silicification is that after the drug filling is completed, it needs to be sterilized by high pressure with a stopper. During the above process, the silicone oil residue will be released from the butyl rubber stopper and dissolved into the drug; It can...

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
IPC IPC(8): C08J7/04B29C71/00C09D183/04C09D127/16
Inventor 董诗成邓俊杰王鹏
Owner 江阴市海华橡塑有限公司
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap