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Silicone Plunger Tip Component – Machinery and Equipment Manufacturing

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.

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.

View Product Details

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

Procurement Evaluation Criteria

Not customer reviews or live demand data. These dimensions support RFQ preparation and supplier evaluation.

Technical documentation

4/5

Manufacturing capability

4/5

Inspection readiness

5/5

Supplier transparency

3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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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.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification

This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

Silicone Plunger Tip