Natural Rubber Stoppers

Natural Rubber Stoppers

Natural Rubber Stoppers are small, cylindrical plugs made from natural rubber, designed to seal the openings of containers such as test tubes, flasks, bottles, and vials. They are commonly used in laboratories and industrial applications to prevent contamination, evaporation, or spillage of contents. Natural rubber stoppers offer excellent elasticity and sealing properties, making them ideal for temporary closures and sealing tasks in various experiments.

Specifications:

• Material: 100% natural rubber (sometimes blended with other rubber compounds for added durability)

• Size Range: Available in various sizes to fit different container openings, from small test tubes to larger flasks

• Shape: Typically cylindrical with tapered sides for a snug fit; some may have a flat top

• Hardness: Soft and flexible, with good elasticity for easy insertion and removal

• Temperature Resistance: Generally resistant to temperatures ranging from -20°C to 100°C, though this can vary based on specific rubber composition

• Chemical Resistance: Offers moderate resistance to acids, alkalis, and some organic solvents; however, it may degrade in the presence of strong acids, oils, or petroleum-based products

• Color: Often available in a natural light brown or beige color, but can also be found in black or other colors depending on the manufacturer

• Packaging: Typically sold in bags or boxes with varying quantities depending on the size

Uses:

• Sealing Containers:

  • Used to seal test tubes, flasks, and bottles in laboratory experiments to prevent spillage, evaporation, and contamination

• Vacuum Systems:

  • Often used in vacuum applications for sealing vessels during distillation or filtration processes

• Storage of Samples:

  • Useful for temporarily sealing biological or chemical samples in small containers to prevent contamination during storage

• Chemical Reactions:

  • Employed in experiments where a sealed environment is needed to control the ingress or egress of gases or vapors

• Medical and Pharmaceutical:

  • Used in laboratory and pharmaceutical settings for sealing vials and containers to preserve the contents

Features:

• ✅ Excellent Elasticity: Provides a snug and reliable seal for various container types

• ✅ Easy Insertion/Removal: Soft and flexible, making it easy to insert and remove from containers

• ✅ Moderate Chemical Resistance: Offers resistance to many common laboratory chemicals, but care should be taken with strong solvents

• ✅ Temperature Stability: Works within a wide temperature range, suitable for most standard laboratory applications

• ✅ Versatile Sizes: Available in many sizes and diameters, making them adaptable to a wide range of laboratory containers

• ✅ Cost-Effective: Affordable, disposable, and commonly used in high quantities

• ✅ Non-Toxic: Suitable for general laboratory use, though specific testing may be needed for sensitive biological experiments

Safety Notes:

• Chemical Compatibility: While natural rubber provides a good seal, it may not be compatible with all chemicals, particularly strong acids, oils, and petroleum-based substances, which may degrade the rubber over time.

• Temperature Limitations: Avoid using natural rubber stoppers in applications involving high temperatures above the rubber’s specified limit, as this can lead to distortion or loss of sealing ability.

• Storage: Stoppers should be stored in a cool, dry place away from direct sunlight and chemical vapors to maintain their integrity.