Coating Degasser

TEL:18925129293

Polyurethane Coating Defoaming Machin


Eliminate bubbles and blisters on PU topcoats · Achieve full, bright and bubble-free coating films

Simultaneous mixing & defoaming within pot life · Low-noise stable operation · Non-contact mixing without ratio deviation

Targeting the high reactivity and easy foaming characteristics of two-component PU topcoats, the SIENOX polyurethane coating defoaming solution completes mixing and vacuum defoaming within the valid pot life. It avoids surface drying while inner layer remains wet, as well as blisters and pinholes, delivering full and high-gloss coating finishes.

✓ CE certification  ✓ ISO9001 Quality Management System ✓ RoHS compliance ✓ Custom voltage available (110V/220V)

Online Message Free Sample Testing Engineer Hotline: 189-2512-9293

Why Do We Need Polyurethane Coating Defoaming Machine

Woodware PU Topcoat

PU topcoats for furniture and wood floors require high fullness and gloss. Sprayed air bubbles form blisters and pinholes on high-build films, directly affecting surface appearance and touch feeling.

Automotive & Plastic Coatings

Automotive refinish paints and plastic PU coatings demand zero surface defects. Bubbles and craters will cause rework and increase production costs.

Marine PU Topcoat

PU topcoats for ships and terminal facilities require superior outdoor weather resistance. Voids and bubbles in coatings will accelerate water penetration and coating aging.

✨ Traditional Dilemma: PU coatings feature fast reaction speed. Slight delay in defoaming leads to thickening and curing. Ordinary vacuum chambers cannot finish pumping within the pot life. Simultaneous mixing and defoaming is required.

Why Choose SIENOX PU Coating Defoaming Solution

Operate Within Pot Life

Simultaneous mixing and defoaming under vacuum shortens processes and completes operation before the PU pot life expires for subsequent application.

Stable & Low Noise

Low equipment vibration prevents extra bubble generation and heat buildup, suitable for sensitive PU systems.

Unchanged Mixing Ratio

Non-contact mixing keeps the two-component ratio unchanged with no cross-contamination, ensuring stable coating film performance.

✨ The MIX series is the ideal defoaming equipment for offset printing inks from color matching to bulk ink supply.

Equipment Supporting Description

Supporting Process Workflow 

Weigh resin and powder → Vacuum stirring, mixing and degassing → Discharge for compacting / casting → Curing / sintering.

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Specifications & Parameters

Selection Guide

PU Coating ApplicationTypical StateRecommended Defoaming MethodRecommended Equipment
Color Matching / Sample PreparationSmall amount of coating materialVacuum DefoamingZK Series
Wood PU TopcoatLow-Medium ViscosityVacuum Stirring and DefoamingMIX60
Automotive / Plastic PU CoatingMedium ViscosityVacuum Stirring and DefoamingMIX80 / MIX1000plus
High-build TopcoatMedium-High ViscosityVacuum stirring + Pressure Fine DefoamingMIX1000plus / RX Series

Our Partners

Trusted by leading industrial manufacturing clusters and advanced university laboratories worldwide

Partner Showcase

FAQ - Frequently Asked Questions

Answers to common questions about product performance and everyday process selection

  • What is the working principle of a centrifugal defoaming machine?

    Principle of centrifugal defoaming machine: The bubbles are released by the downward principle of gravity.

  • How is the after-sales service?

    The company has professional after-sales service personnel, 24-hour dedicated service, and one-on-one technical support to solve your worries.

  • Why choose SIENOX?

    There are many reasons for choosing SIENOX, and the following are some of the main reasons:

    1. Professionalism: Our team consists of a group of professional individuals with rich experience and knowledge in their respective fields. We not only understand industry trends and best practices, but also provide practical and feasible solutions.

    2. Service quality: We focus on customer needs and satisfaction, and are always committed to providing high-quality services. We not only respond quickly to customer needs, but also provide customized services according to their requirements.

    3. Reliability: We adhere to the principles of integrity and professionalism, always adhering to commitments and agreements. Our work methods and deliverables comply with industry standards and best practices, enabling our clients to trust us.

    4. Innovation: We continuously explore new methods and tools to provide better services and meet customer needs. We encourage innovation and experimentation, and are willing to accept challenges and change.

    5. Cost effectiveness: We provide cost-effective services that not only help customers save costs, but also improve efficiency and productivity. We always prioritize the interests of our customers and provide them with the best solutions.

    6. Teamwork: We believe in the power and value of teamwork, and our team members support, collaborate, and respect each other. We establish close cooperative relationships with customers, partners, and other stakeholders to achieve common goals.

    The above are just some of the reasons for choosing us. We believe there are many other advantages and values that can be provided to customers. If you are looking for a professional, reliable, and high-quality service provider, we look forward to working with you.


  • How does the stirring and defoaming machine work?

    The SIENOX stirring and defoaming machine performs defoaming through centrifugal force at revolution and stirring through shear force formed by revolution and rotation,

    Assisted by a vacuum pump to extract gas and achieve a vacuum state, removing nanoscale tiny bubbles. No contact with materials, no secondary pollution, and no secondary waste.

  • What is the function of a defoaming machine?

    A defoaming machine is a device used to remove bubbles from liquids. Its function is to assist in the liquid mixing, reaction, coating, printing, infusion and other process steps in the production process, avoiding the generation of bubbles and their impact on the final product. In many industrial and laboratory environments, removing bubbles is essential as they may have a negative impact on product quality, such as affecting surface tension and stability. Defoaming machines typically use various techniques such as vibration, ultrasound, centrifugation, etc. to achieve effective bubble removal. It has a wide range of applications, including but not limited to semiconductors, solar energy, optics, biotechnology, materials science, etc.

Technical Specification List

Full‑line standardized specifications for accurate process evaluation and equipment selection

PU Coating ApplicationTypical StateRecommended Defoaming MethodRecommended Equipment
Color Matching / Sample PreparationSmall amount of coating materialVacuum DefoamingZK Series
Wood PU TopcoatLow-Medium ViscosityVacuum Stirring and DefoamingMIX60
Automotive / Plastic PU CoatingMedium ViscosityVacuum Stirring and DefoamingMIX80 / MIX1000plus
High-build TopcoatMedium-High ViscosityVacuum stirring + Pressure Fine DefoamingMIX1000plus / RX Series

Multi‑Industry Solutions

Covering stirring and debubbling applications of typical materials across six major industries

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Wood Coating

PU topcoat for furniture and flooring

Automotive Coating.jpg

Automotive Coating

PU coating for auto refinishing and whole vehicle painting

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Plastic Coating

Coating for plastic parts and 3C housings

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Marine Coating

PU topcoat for ships and port facilities

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Industrial Topcoat

PU decorative coating for machinery and equipment

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Coating Factory

Production, color matching and filling of PU paints

Comprehensive Equipment Operation Demo Videos

Gain intuitive, clear, dynamic insight into synchronous defoaming with planetary centrifugal force and high negative pressure.

Measured Defoaming‑Process Performance

Measured Processing Results for Six Typical Materials

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Paste Materials

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Adhesive with Powder

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Polymer Materials

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Pharmaceutical Gel

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Silver Paste Materials

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Battery Slurry



Precautions for Use

NotesOperation Instructions
Mix Ratio & Material TemperatureStrictly control the two-component ratio and material temperature. Preheat prior to defoaming and application if needed.
Pot LifePU has high reactivity. Carry out spraying as soon as possible after defoaming to avoid thickening overtime.
Vacuum DegreeAdjust vacuum degree according to formulations to prevent system abnormality caused by excessive pumping.
Slow Pressure ReleaseRelease pressure slowly after defoaming to prevent re-foaming of coating.

* Internal laboratory test data. Actual results vary with coating formulation and construction technology. Contact sales for real customer cases.

Customer Delivery & Application Cases

Rooted in manufacturing frontlines, empowering benchmark production lines and key national research institutions across diverse industries.


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Stirring‑Defoaming Solution for Glue Materials in Consumer‑Electronics Industry


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Vacuum Defoaming Solution for Consumer Electronics Adhesives


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Industrial University Solves Bubble Challenges of Coating‑Film Materials with SIENOX Defoaming Machine

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