SIENOX Centrifugal Defoaming Solution for Silicone‑Rubber Parts

Working Requirements: Thoroughly remove stubborn micro‑bubbles mixed into silicone‑rubber materials during compounding and preparation, including silicone products, medical‑grade silicone, electronic potting silicone, food‑grade silicone, industrial silicone, silicone molds, silicone tubes and so forth. Silicone‑rubber features high viscosity and great elasticity, so bubbles cannot escape naturally. After defoaming, the material shall be uniform and fine with smooth and bubble‑free surfaces after molding, qualified physical properties, and meet high‑quality requirements for silicone products in medical, food, electronic and other industries.


Comparison Before and After Optimization

Before Optimization: Silicone product manufacturers commonly face the following pain points:

• Silicone‑rubber has high viscosity and high elasticity. Micro‑bubbles generated during compounding are trapped inside the colloid. Conventional static defoaming takes hours or even days with extremely low efficiency.

• Residual bubbles cause pinholes and uneven surfaces on molded silicone parts, severely ruining appearance quality. Medical‑grade and food‑grade products fail to meet hygiene standards.

• Bubbles create discontinuous internal structures, reducing tensile strength, tear strength, resilience and shortening service life of silicone products.

• Residual bubbles in medical‑grade and food‑grade silicone products may trigger bacterial growth and substance precipitation, bringing potential safety hazards.

• Bubbles in electronic potting silicone result in incomplete sealing. Moisture ingress accelerates corrosion of electronic components and greatly lowers product reliability.

 

Solution: According to actual production demands of silicone product manufacturers, SIENOX provides the C012 centrifugal defoamer and supporting solutions:

1. High‑speed centrifugal defoaming: Adopt C012 centrifugal defoamer. High‑speed centrifugal force rapidly throws out stubborn micro‑bubbles inside silicone‑rubber. Efficient separation between bubbles and colloid is achieved within several minutes.

2. High efficiency: Centrifugal defoaming is far more efficient than static degassing, greatly shortening production cycles and improving productivity.

3. Improved surface quality: Fully‑defoamed silicone‑rubber delivers smooth, fine molded surfaces free of pinholes and irregularities with excellent appearance.

4. Guaranteed physical performance: Defoamed silicone products own dense and continuous internal structures with remarkably enhanced tensile strength, tear strength and resilience.

5. Precisely controllable parameters: Adjustable centrifugal speed and duration allow precise process optimization for different silicone formulations to guarantee batch‑to‑batch consistency.


Sample Provider: A well‑known domestic silicone‑product manufacturer

Silicone‑Rubber Material Sample.jpg

Test Conditions

Item

Parameter

Test Model

Centrifugal Defoamer C012

Test Material

Silicone‑Rubber Material

Test Rotation Speed

1500 rpm

Test Duration

3 minutes

Defoaming Effect Comparison

Comparison Item

Before Defoaming

After Defoaming

Bubble Content

Plenty of stubborn micro‑bubbles, uneven colloid

Bubbles almost eliminated, dense and uniform colloid

Molded Appearance

Pinholes and uneven surfaces

Smooth and fine surfaces, no bubble‑related defects

Physical Properties

Reduced tensile strength and tear strength

Significantly improved physical performance, excellent resilience

Medical & Food‑grade Safety

Bubbles may lead to bacterial growth

Bubble‑free, compliant with hygiene and safety standards

Electronic Potting Reliability

Incomplete sealing, vulnerable to moisture ingress

Complete sealing, greatly enhanced long‑term reliability

Production Efficiency

Static degassing for hours or even days

Completed within minutes, substantial efficiency improvement

Silicone‑Rubber Before‑After Comparison.jpg

Mature Application Fields

• Medical‑grade silicone products (medical device accessories, medical catheters, silicone sealing parts)

• Food‑grade silicone products (food molds, silicone kitchenware, food transfer hoses)

• Electronic potting silicone (potting protection for power modules, sensors and control units)

• Silicone molds (craft molds, industrial forming molds, replica‑casting silicone)

• Silicone tubes (medical catheters, food transfer hoses, industrial flexible hoses)

• Industrial silicone seals (O‑rings, gaskets, damping pads)