Halogenated butyl rubber plug coated with Teflon, profiling mold and production process

Abstract

The invention relates to a halogenated butyl rubber plug coated with Teflon, a profiling mold and a production process. The halogenated butyl rubber plug comprises a plug crown and a plug neck made ofhalogenated butyl rubber, the plug crown comprises an upper plug crown body arranged on the upper portion and an annular lower plug crown body arranged on the lower portion, the plug neck is coveredwith a Teflon film, the upper end of the Teflon film is bent outwards to form an annular clamping piece, the annular clamping piece is arranged between the upper plug crown and the annular lower plugcrown, a plurality of micropores are formed in the annular clamping piece, a plurality of connecting columns are arranged in the micropores, and the two ends of each connecting column are integrally connected with the upper plug crown and the annular lower plug crown respectively. The coated rubber plug prepared by the method disclosed by the invention is low in defective rate, and the prepared rubber plug is good in sealing performance and excellent in compatibility with medicines.

Description

technical field [0001] The invention belongs to the field of rubber stopper preparation, in particular to a halogenated butyl rubber stopper coated with Teflon, a molding die and a production process. Background technique [0002] As a sealing material directly in contact with medicines, medicinal rubber stoppers must have excellent airtightness, good chemical stability and biological inertness. On the one hand, the medicinal rubber stopper itself cannot interact with the raw materials of the drug to affect the quality of the drug. [0003] The existing materials used in the production of medical rubber stoppers mainly include natural rubber, polyisoprene rubber, butyl rubber and halogenated butyl rubber. Under normal circumstances, a variety of compounding agents are added to mix evenly and then molded and vulcanized. made. Various compounding agents in the matching system that support the formation of rubber stopper characteristics have different chemical activities. Whe...

AI Technical Summary

Problems solved by technology

It is the preferred film material to solve the problem of compatibility between rubber stoppers and medicines. However, due to the large gap between this material and rubber material, the large difference in processing temperature, and the lack of thermoplasticity, in the process of laminating with conventional methods, There are often the following problems: 1) The membrane material itself is not elastic, which affects the sealing performance between the rubber plug and the glass bottle mouth; 2) After the membrane material and rubber are hot-pressed, the rubber plug is shaped together in the vulcanization process to form a plug Neck, for rubber plugs with complex shapes, especially those with grooves at the bottom of the neck, they need to be subjected to both downward and upward deformation forces during the shaping process. It is easy to have bulges and weak bonds between rubber and rubber, and it is also prone to problems such as film peeling off in the subsequent cleaning process, and the yield is low, especially for Teflon materials. Hard, high heat-resistant temperature, poor deformation performance at the vulcanization temperature of rubber, therefore, its yield is extremely low, which limits its application in rubber stopper coating

Images