Frequently Asked Questions on water-based release agent
What is a water-based mold release agent?
The water-based mold release agent is also a water-soluble mold release agent, that is, the internal components of the mold release agent can be completely dissolved in water. Industrially, an emulsion of a compound such as a methyl silicone oil is generally used, and the emulsion is water-soluble and can be obtained. It has the characteristics of high heat resistance, easy cleaning, good corrosion resistance and fire resistance, less environmental pollution, and relatively safe transportation and storage.
What are the characteristics of water-based mold release agents?
The water-based mold release agent has strong adhesion and can preferentially adhere to the mold instead of being transferred to the molded part. It can also modify the surface of the resin, which is beneficial to the fluidity of the resin and improves the surface quality of molded parts. It is widely used in molds and silicon Demoulding of rubber, plastic and other products.
Due to the presence of large amounts of water, water-based release agents differ in many ways from traditional oil-based or solvent-based release agents. The release effect of water-based release agents relies on the deposition of a thin film only a few microns thick on the cavity surface after spraying. Therefore, there are higher requirements for the selection of ingredients and the use of processes. But its advantages are also obvious, which are conducive to automatic operation, good cooling effect, no fouling, improved surface quality of castings, reduced internal pores, safe use, clean production, and reduced environmental pollution.
What is the composition of the water-based mold release agent?
Generally speaking, water-based mold release agents consist of at least three components: base material, emulsifier, and water. The base material can be regarded as the active ingredient, which finally plays the role of mold release lubrication. The materials used are usually oils, greases, waxes, polymers and silicones. The function of the emulsifier is to uniformly disperse the above materials in the form of extremely fine particles in the continuous water tank to form a stable emulsion. Water just acts as a carrier. The main components of the water-based mold release agent emulsified from refined oil and various additives are mineral oil, animal and vegetable oil, synthetic grease, natural paraffin, synthetic paraffin, silicone oil, solid (lubricating oil), emulsifier, additive, mildew proof agent, rust inhibitor. Most high-quality mold release agents are formulated from 15 to 25 raw materials. If a key ingredient or additive were to change by 1%, their release properties could be very different, which would also bring more cost and price. big change. Each release agent has its best application range and object. If the wrong object is used, the product of the best quality also fails to function as it should. Water-based mold release agents generally do not contain solid particles and can be diluted ten to hundreds of times with water, and the water content generally accounts for more than 95%.
What are the types of water-based mold release agents?
According to the type of effective release material in the water-based release agent, it is mainly divided into three types: silicone oil type, wax type and fatty acid type.
1. Silicone oil-based water-based mold release agent:
Silicone oil and silicone oil derivatives are more suitable as release agents for polyurethane, with good release properties, such as release agents for aluminum alloy molding. Composition of lubricants, emulsifiers and water. Silicone oils and their derivatives have been shown to have good mold release properties over the years. However, when the molded product needs secondary processing, such as post-coating, the silicone oil-based mold release agent has certain side effects.
2. Wax-based water-based mold release agent:
The release agent used in polyurethane molded products is mainly wax, and wax has good release properties. In the early days, waxes were added to organic solvents to make mold-release agents. Recently, it has been reported that adding wax to water can make a suspension water-based mold release agent. The waxes used are natural or synthetic waxes such as polyethylene waxes. These release agents are mainly used in the production of flexible foams.
3. Fatty acid water-based mold release agent:
The components of this release agent are higher fatty acid ester, fatty acid salt, other additives and water. For the production of rigid and flexible foam moldings.
Release agents supplier
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