INDUSTRY COMPONENT

Silicone Plunger Tip

Medical-grade silicone plunger tip for precise fluid delivery in syringes

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Component Specifications

Definition
A precision-engineered silicone component that forms the sealing interface between the plunger rod and syringe barrel in medical-grade polypropylene syringes. It ensures leak-proof operation, smooth movement, and accurate dosage delivery while maintaining biocompatibility with pharmaceutical formulations.
Working Principle
Creates a dynamic seal through elastic deformation against the syringe barrel's inner wall, allowing controlled fluid displacement while preventing backflow or leakage during injection or aspiration operations.
Materials
Medical-grade silicone (typically platinum-cured LSR) with hardness 40-60 Shore A, USP Class VI compliant, free from latex and animal-derived ingredients
Technical Parameters
  • Hardness 50±5 Shore A
  • Bioburden ≤ 100 CFU/g
  • Tear strength ≥ 30 N/mm
  • Surface finish Ra ≤ 0.8 μm
  • Compression set ≤ 10%
  • Extraction limits ≤ 0.5%
  • Diameter tolerance ±0.05 mm
Standards
ISO 7886-1, ISO 10993, USP <381>, DIN 13097

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Silicone Plunger Tip.

silicone plunger tip medical syringe component pharmaceutical sealing LSR medical parts plunger seal injection device parts biocompatible silicone Silicone Plunger Tip in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Medical-Grade Polypropylene Syringe

Sterile disposable syringe manufactured from medical-grade polypropylene for clinical applications.

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Engineering Analysis

Risks & Mitigation
  • Material degradation from incompatible medications
  • Seal failure due to dimensional inaccuracies
  • Particulate generation from surface wear
  • Extractable/leachable contamination
  • Sterilization method incompatibility
FMEA Triads
Trigger: Material formulation deviation
Failure: Reduced elasticity leading to seal leakage
Mitigation: Implement raw material certification and batch testing per ISO 10993
Trigger: Manufacturing dimensional variation
Failure: Increased friction or fluid bypass
Mitigation: Statistical process control with Cpk ≥ 1.33 for critical dimensions
Trigger: Incompatible sterilization method
Failure: Material degradation and performance loss
Mitigation: Validate sterilization protocols (ETO, gamma, autoclave) for each material lot

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Dimensional tolerances per ISO 11040-4, extractables per USP <1663>, biocompatibility per ISO 10993 series
Test Method
Dimensional verification via optical comparators, seal integrity testing per ASTM F2391, compression set per ASTM D395, extractables analysis via HPLC/GC-MS

Buyer Feedback

★★★★☆ 4.8 / 5.0 (27 reviews)

"The technical documentation for this Silicone Plunger Tip is very thorough, especially regarding technical reliability."

"Reliable performance in harsh Machinery and Equipment Manufacturing environments. No issues with the Silicone Plunger Tip so far."

"Testing the Silicone Plunger Tip now; the technical reliability results are within 1% of the laboratory datasheet."

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Frequently Asked Questions

Why is medical-grade silicone preferred for plunger tips?

Medical-grade silicone offers superior biocompatibility, chemical resistance to pharmaceuticals, consistent elasticity for reliable sealing, and meets stringent regulatory requirements for patient safety.

How does plunger tip design affect syringe performance?

Optimal tip design minimizes friction for smooth operation, maintains seal integrity across temperature variations, prevents medication adherence, and ensures accurate dosage delivery throughout the syringe's operational life.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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