Filler Materials: Particle Size 0.1-50 µm, Purity >99%

Q: What are common fillers used in medical silicone gels?

Common fillers include fumed silica for thickening, barium sulfate for radiopacity, and calcium carbonate for cost reduction.

Q: How do fillers affect silicone gel properties?

Fillers increase viscosity, improve tear strength, and can add radiopacity. They also influence hardness and flow behavior.

Q: Are filler materials biocompatible?

Yes, fillers used in medical silicone gels must meet biocompatibility standards like ISO 10993 to ensure safety.

Component Specifications

Definition

Filler materials are inert substances incorporated into medical silicone gel formulations to enhance mechanical properties, control flow behavior, or impart specific functionalities such as radiopacity for imaging. Common fillers include silica, barium sulfate, and calcium carbonate, which are selected based on biocompatibility and performance requirements.

Working Principle

Fillers are dispersed within the silicone matrix to increase viscosity, improve tear strength, or add radiopacity. They interact with polymer chains through physical bonding or surface treatment, altering the gel's rheological and mechanical characteristics without chemical reaction.

Materials

Silica (fumed or precipitated), barium sulfate, calcium carbonate, titanium dioxide, or other biocompatible inorganic powders. Particle size typically 0.1-50 µm, surface-treated for compatibility.

Technical Parameters

Parameter	Typical range	Notes & selection driver
Purity	>99%
Particle Size	0.1-50 µm
Moisture Content	<0.5%
Specific Gravity	2.0-4.5 g/cm³
Surface Treatment	Silane or stearic acid

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 10993-1, ISO 18562, DIN EN 868

Parent Products

This component is used in the following industrial products

Medical Silicone Gels

Medical-grade silicone-based gels used for wound care, scar management, and medical device applications.

View Product Details

Engineering Analysis

Risks & Mitigation

Incompatibility with silicone matrix leading to phase separation
Contamination affecting biocompatibility
Inconsistent particle size distribution causing property variation

FMEA Triads

Trigger: Improper surface treatment
Failure: Poor dispersion and agglomeration
Mitigation: Use silane-treated fillers and optimize mixing parameters

Trigger: High moisture content
Failure: Bubble formation and reduced mechanical strength
Mitigation: Dry fillers before use and store in sealed containers

Trigger: Incorrect particle size
Failure: Inconsistent gel viscosity and hardness
Mitigation: Specify tight particle size distribution and perform incoming inspection

Industrial Ecosystem

Compatible With

Typical Suppliers & Equivalents

Compliance & Inspection

Tolerance

Particle size ±10% of nominal, moisture <0.5%

Test Method

Laser diffraction for particle size, Karl Fischer titration for moisture, ICP-MS for purity

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 Filler Materials

Manufacturer profiles associated with Filler Materials.

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Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review

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Mold Release Coating

Specialized coating applied to molds to facilitate easy release of silicone seal rings during manufacturing.

Silicone Polymer Base

Silicone polymer base is a high-temperature resistant polymer material used as the foundational component in silicone rubber compounds for industrial applications.

Frequently Asked Questions

What are common fillers used in medical silicone gels?