Author: Site Editor Publish Time: 2024-03-06 Origin: Site
Guangdong Anlin Technology Co., Ltd. is a leading rubber stopper manufacturer specializing in custom rubber stoppers for pharmaceutical, laboratory, and food processing applications. With over 20 years of manufacturing expertise and an ISO 9001:2015 certified facility, we deliver premium quality stoppers that meet rigorous international standards.
Rubber stoppers, also known as rubber bungs or rubber plugs, are versatile sealing components used to close containers, vials, and laboratory equipment. They create an airtight seal that prevents contamination, leakage, and evaporation while maintaining the integrity of the contents inside. Made from various elastomeric compounds, rubber stoppers can be formulated to withstand extreme temperatures, chemical exposure, and sterilization processes.
Pharmaceutical-grade rubber stoppers are designed for use in drug vials, IV bottles, and medical containers. These stoppers comply with USP Class VI, EP, and JP standards for biocompatibility. Available in butyl rubber, bromobutyl, and chlorobutyl formulations, they offer excellent barrier properties and compatibility with sterilization methods including autoclaving, gamma irradiation, and ethylene oxide (EO) gas.
Our laboratory rubber stoppers come in a wide range of sizes — from solid stoppers for Erlenmeyer flasks and test tubes to one-hole and two-hole designs for vacuum filtration and gas delivery systems. Made from natural rubber, neoprene, or silicone, they provide reliable sealing for chemical, biological, and educational lab environments.
For the food and beverage industry, we offer FDA-compliant rubber stoppers for wine bottles, brewing equipment, and food storage containers. Our silicone and EPDM formulations are odorless, tasteless, and resistant to food acids and cleaning chemicals.
Industrial applications require heavy-duty rubber stoppers for pipe sealing, tank bungs, and equipment plugs. We manufacture custom-shaped stoppers in various durometers (Shore A 30–90) to suit different sealing pressures and environmental conditions.
| Material | Temperature Range | Key Properties | Best Applications |
|---|---|---|---|
| Silicone Rubber | -60°C to 230°C | Excellent flexibility, odorless, FDA approved | Food, medical, laboratory |
| Butyl Rubber (IIR) | -40°C to 120°C | Low gas permeability, high chemical resistance | Pharmaceutical vials, chemical containers |
| EPDM Rubber | -40°C to 150°C | Excellent weather/ozone resistance, good chemical resistance | Outdoor equipment, food processing |
| Nitrile Rubber (NBR) | -30°C to 120°C | Excellent oil/grease resistance, good abrasion resistance | Industrial plugs, automotive bungs |
| Neoprene (CR) | -30°C to 120°C | Good chemical resistance, flame retardant | Laboratory, marine, industrial |
| Natural Rubber (NR) | -20°C to 80°C | High elasticity, good tensile strength | General-purpose stoppers, educational labs |
We work closely with clients to select the optimal rubber compound based on the application requirements — considering factors such as chemical exposure, temperature range, sterilization method, and regulatory compliance (FDA, USP, ISO).
Using CAD/CAM technology, our experienced mold makers design precision molds tailored to your exact stopper specifications — including custom shapes, sizes, and surface finishes.
Depending on the volume and complexity, we use either compression molding (for lower volumes and larger sizes) or injection molding (for high-volume precision stopper production). Both processes ensure consistent quality and dimensional accuracy.
After molding, stoppers undergo post-curing to stabilize their physical properties. Secondary operations such as trimming, silicone coating (for easier insertion), and visual inspection are performed to ensure each stopper meets our strict quality standards.
Every batch is tested for dimensional accuracy, hardness (durometer), tensile strength, and compression set. For pharmaceutical and food-grade stoppers, additional biocompatibility and extractable/leachable testing is available. Clean packaging options include individual wrapping, bulk bags, and sterile packaging.
Guangdong Anlin Technology is ISO 9001:2015 certified, ensuring consistent quality management across all manufacturing processes. Our rubber stoppers can be manufactured to meet the following standards:
Rubber stoppers are typically sized by the top diameter and bottom diameter. For laboratory use, common sizes range from #0 (small) to #14 (large). For custom industrial applications, we manufacture to your exact dimensional specifications. Contact our team with your container details and we will recommend the right fit.
Yes. Depending on the rubber material, our stoppers can withstand autoclaving (steam sterilization), gamma irradiation, ethylene oxide (EO) gas, and dry heat sterilization. Silicone and butyl rubber stoppers offer the best compatibility with multiple sterilization methods.
Our food-grade silicone and EPDM stoppers are manufactured from FDA 21 CFR 177.2600 compliant materials. For pharmaceutical applications, we offer USP Class VI tested formulations with supporting documentation.
For standard sizes, MOQ is typically 500–1,000 pieces. For custom molded stoppers, MOQ depends on the complexity and mold costs. Contact our sales team for a specific quotation.
Typical lead time is 15–25 working days from mold approval. Rush orders can be accommodated for existing molds. We recommend contacting us early in your product development cycle to discuss timelines.
Ready to order custom rubber stoppers for your application? Contact our team with your specifications including: material requirements, dimensions, quantity, and any applicable standards (FDA, USP, ISO). We will provide a competitive quotation within 24 hours.
Call us at 0769-86302535 or email homson@anlintech.com to discuss your rubber stopper requirements with our experienced engineering team.
We use cookies on our website to see how you interact with it. By accepting, you agree to our use of such cookies. Cookie Policy
Accept Cookies Ignore