Silicone Plunger Tip: Diameter tolerance ±0.05 mm

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

Parameter	Typical range	Notes & selection driver
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

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Standards

ISO 7886-1, ISO 10993, USP <381>, DIN 13097

Parent Products

This component is used in the following industrial products

Medical-Grade Polypropylene Syringe

Sterile disposable syringe made from medical-grade polypropylene for clinical fluid administration.

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

Typical Suppliers & Equivalents

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

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Manufacturers of Silicone Plunger Tip

Manufacturer profiles associated with Silicone Plunger Tip.

Sourcing Silicone Plunger Tip from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Related Components

Chrome Plating

Hard chrome plating is an electroplating process that deposits a layer of chromium onto metal surfaces to enhance wear resistance, corrosion protection, and reduce friction for hydraulic cylinder piston rods.

Upper Tool (Punch)

Upper Tool (Punch) is the active forming component in metal plate bending machines that applies precise downward force to create bends in sheet metal.

Main Frame

The main frame is the primary structural component of a hydraulic press, providing rigidity and stability to withstand high compressive forces during metal forming operations.

Shaft Bearing

Precision component supporting rotating shafts in vibration motors to reduce friction and maintain alignment.

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.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records. See the editorial policy.

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