Overview
Mould release oil emulsion spray is an industrial auxiliary product designed to prevent adhesion between mould surfaces and finished parts during manufacturing processes. These sprays are widely used in concrete casting, plastic injection, rubber moulding, composite production, polyurethane foaming, and metal forming operations.
Oil emulsion–based systems combine the lubricating properties of oils with the ease of application and cleanliness of water-based emulsions, offering efficient release performance with reduced residue.
Main Objectives of the Mould Release Spray
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Prevent sticking between mould and product
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Ensure clean and smooth demoulding
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Reduce mould wear and surface damage
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Improve surface finish of the final product
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Minimize mould cleaning frequency
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Provide easy and uniform spray application
General Composition Structure
A typical oil emulsion mould release spray consists of:
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Release oil phase
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Emulsifying system
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Water-based carrier
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Lubricity and slip enhancers
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Corrosion inhibitors
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Stabilizers
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Preservatives
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Optional fragrance or dye
Key Raw Material Groups
Release Oils
Release oils form the primary non-stick layer on mould surfaces.
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Mineral oils
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Vegetable oils
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Synthetic oils
The oil type is selected based on mould material and process temperature.
Emulsifiers
Emulsifiers allow stable dispersion of oil in water.
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Nonionic emulsifiers
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Emulsifier blends for oil-in-water systems
They ensure emulsion stability and uniform sprayability.
Water (Carrier System)
Water acts as the main carrier, enabling easy dilution, spray application, and reduced solvent content.
Lubricity and Slip Additives
These additives enhance release efficiency and film uniformity.
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Fatty acid derivatives
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Ester-based lubricity enhancers
Corrosion Inhibitors
Corrosion inhibitors protect metal moulds from rust and oxidation, especially in water-based systems.
Stabilizers and Preservatives
These components maintain emulsion stability and microbiological safety during storage and use.
Step-by-Step Production Process
Step 1: Preparation of the Water Phase
Deionized water is charged into a mixing vessel, and agitation is started. Preservatives and corrosion inhibitors are dissolved completely in the water phase.
Step 2: Emulsifier Incorporation
Selected emulsifiers are added to the water phase and mixed until a uniform and clear solution is obtained.
Step 3: Oil Phase Addition
The release oil is slowly introduced into the emulsifier-containing water phase under controlled agitation to form a stable oil-in-water emulsion.
Step 4: Addition of Lubricity Enhancers
Lubricity and slip additives are incorporated to improve demoulding efficiency and surface finish.
Step 5: Homogenization
The emulsion is mixed or homogenized to achieve fine droplet size, stability, and consistent spray performance.
Step 6: Stability Adjustment
pH and emulsion stability are checked and adjusted to ensure long-term storage stability and mould compatibility.
Step 7: Filtration and Filling
The finished mould release emulsion is filtered and filled into trigger spray bottles, pump sprayers, or aerosol containers depending on the application system.
Physical and Technical Characteristics
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Appearance: Milky white or translucent emulsion
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Odor: Mild or neutral
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Release performance: High
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Residue: Minimal and non-staining
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Application method: Spray-on thin film
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Compatibility: Metal, plastic, rubber moulds
Application Guidelines
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Shake well before use
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Apply a thin, even layer to the mould surface
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Allow brief drying or settling time
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Proceed with moulding operation
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Reapply as required
Packaging and Storage
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Packaging: Trigger spray bottles, pump sprayers, aerosol cans
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Storage conditions: Cool, dry place away from direct sunlight
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Shelf life: Stable under recommended storage conditions
Safety and Handling
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Avoid inhalation of spray mist
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Use in well-ventilated areas
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Avoid contact with eyes and prolonged skin exposure
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Keep containers tightly closed when not in use
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Store out of reach of children
Summary
The process to make mould release with oil emulsion spray focuses on forming a stable oil-in-water emulsion that delivers effective release performance, easy application, and mould protection. Proper emulsifier selection, controlled oil addition, and homogenization ensure consistent demoulding, improved surface quality, and reliable industrial performance.
