L-Shaped Connected Plastic Stoppers Injection-Molded Laboratory & Medical Seals

Our L-shaped connected plastic stoppers are precision-engineered, injection-molded components designed for secure sealing in laboratory, medical, and diagnostic applications. Crafted from high-quality, semi-transparent medical-grade plastic (PP/PE), these stoppers feature a unique L-shaped connected design that streamlines automated assembly and ensures consistent, reliable performance for sample containment and reagent storage.
 
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  • YIXUN mold

  • 8480419090

Our L-shaped connected plastic stoppers are precision-engineered, injection-molded components designed for secure sealing in laboratory, medical, and diagnostic applications. Crafted from high-quality, semi-transparent medical-grade plastic (PP/PE), these stoppers feature a unique L-shaped connected design that streamlines automated assembly and ensures consistent, reliable performance for sample containment and reagent storage.

Key Features

✅ Precision Injection Molding

  • Manufactured via high-precision injection molding to guarantee uniform dimensions, tight tolerances, and consistent sealing performance across every stopper in the batch.

  • Smooth, burr-free surfaces prevent sample contamination and ensure easy insertion/removal from vials, tubes, and reaction wells.

✅ L-Shaped Connected Design

  • L-shaped layout with 6 stoppers per connected strip (3 per arm) for seamless integration into automated filling and capping lines.

  • Thin, flexible connecting ribs allow for easy individual snap-off while maintaining structural integrity during handling and assembly.

  • Precisely positioned notches and alignment features enable automated gripping, positioning, and sealing for high-throughput production.

✅ Medical-Grade Material

  • Made from non-toxic, chemically resistant medical-grade plastic (PP/PE) that complies with global biocompatibility standards (ISO 10993).

  • Semi-transparent material allows visual inspection of seal integrity and sample status without removing the stopper.

  • Excellent chemical resistance to common laboratory reagents, biological samples, and pharmaceutical formulations.

✅ Optimized Sealing Design

  • Each stopper features a central raised dome for precise alignment with vial/tube openings, ensuring a leak-proof seal every time.

  • Uniform wall thickness and tapered edge design create a secure, friction-fit seal that prevents evaporation, contamination, and sample leakage.

  • Compatible with a wide range of standard laboratory tubes, cryovials, reaction cups, and reagent bottles.


Applications

  • Laboratory Consumables: Sealing for cryovials, centrifuge tubes, sample collection tubes, and microreaction vessels.

  • Medical & Pharmaceutical: Small-dose vials, diagnostic reagent kits, and point-of-care testing (POCT) devices.

  • Biotech & Diagnostics: Sealing for ELISA plates, PCR tubes, and other molecular biology consumables.

  • Industrial Packaging: Secure sealing for small-volume chemical reagents and specialty industrial fluids.


Technical Specifications

Parameter Details
Material Medical-Grade PP/PE (Semi-Transparent)
Configuration L-Shaped Connected Strip (6 stoppers per strip)
Stopper Dimensions Standard fit for 5mm–8mm vial/tube openings
Color Natural Semi-Transparent (Custom colors available upon request)
Sterilization Compatible with gamma irradiation, ethylene oxide (EtO), and autoclaving (121°C, 15 psi)
Packaging Cleanroom-packaged in sealed, dust-free bags to maintain sterility and purity

Why Choose Our Connected Stoppers?

  1. Automation-Ready: The L-shaped connected format is engineered for high-speed automated assembly lines, reducing manual labor and increasing production efficiency.

  2. Consistent Quality: Injection-molded production ensures zero variation in stopper dimensions and sealing performance, critical for medical and laboratory applications.

  3. Regulatory Compliance: Manufactured in a ISO 13485-certified cleanroom environment, meeting strict global medical device and laboratory consumable standards.

  4. Customization: We offer tailored solutions, including custom shapes, materials, colors, and packaging to meet your unique application requirements.


Ordering Information

  • Minimum Order Quantity (MOQ): 100,000 pieces (negotiable for bulk orders)

  • Lead Time: 15–25 business days for standard orders; expedited options available

  • Packaging: Customizable packaging (bulk packs, sterile packs, or individual strip packaging)

  • Sample Availability: Free pre-production samples available upon request for quality verification


FAQ

Q: Are these stoppers compatible with cryogenic storage?

A: Yes, our medical-grade PP/PE stoppers are designed to withstand long-term cryogenic storage (-80°C) without losing sealing integrity.

Q: Can I get custom colors or printed markings on the stoppers?

A: Absolutely! We offer custom color matching and laser marking/printing for batch tracking or branding purposes.

Q: Are the stoppers supplied sterile?

A: We offer both sterile (gamma-irradiated or EtO-sterilized) and non-sterile options to suit your application needs.

Q: What is the shelf life of these stoppers?

A: When stored in a cool, dry environment, the stoppers have a shelf life of 3 years from the date of manufacture.

L-Shaped Connected Plastic Stopper

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