The release agent is a functional material between the mold and the product. In the rubber and plastic manufacturing industry, in order to demold, improve production efficiency, extend the service life of the mold, make the product clean and qualified, and reduce waste, it is an essential additive.
The mold release agent is divided into internal mold release agent and external mold release agent. For various reasons, internal mold release agents are rarely used, and external mold release agents are still widely used.
The external release agent is generally composed of a medium and a release active substance. The medium is generally an organic solvent or water. Silicone oils, waxes and oils are common among mold release actives. The medium in the currently used external mold release agents is generally organic solvents such as halogenated hydrocarbons and aliphatic hydrocarbons. Since the organic solvents used are usually toxic or flammable and pollute the environment, water as a solvent does not have these disadvantages. The development and application of water-based mold release agents have been developed abroad, and quite a few products have appeared.
China is still in its infancy in this field. At present, the market consumption of water-based mold release agents is gradually increasing. With the improvement of people's awareness of environmental protection, its consumption will definitely increase. Therefore, my country should pay full attention to the research and development of water-based mold release agents, so water-based mold release agents using water as a medium have attracted widespread attention.
Types of water-based release agents: mainly divided into silicone oil type, wax type, etc.
1) Silicone oil water-based release agent
Silicone oil and silicone oil derivatives are more suitable as polyurethane mold release agents with good mold release properties, such as aluminum alloy casting mold release agents, which are composed of silicone oil, special pressure lubricant, emulsifier and water. Silicone oils and their derivatives have been shown to have good mold release over the years. But when the mold product needs secondary processing, such as post-coating, the silicone oil release agent has certain side effects.
2) Wax water-based release agent
The release agent used in polyurethane molding products is mainly wax, and wax has good release performance. In the early stages, waxes were added to organic solvents to make mold release agents. It has recently been reported that wax can be added to water to make a suspension water-based release agent. The wax used is a natural wax or a synthetic wax such as polyethylene wax. This release agent is mainly used in the production of flexible foams.
3) Fatty acid water-based mold release agent
This release agent contains higher fatty acid ester, fatty acid salt, other additives and water. For the production of hard and soft foam mold products.
High-quality mold release agent is mainly made of 15~25 kinds of raw materials. If a key ingredient or additive changes by 1%, its release properties can vary widely, which can also make a big difference in cost and price. Each release agent has its optimum application range and object. If the wrong object is used, a high-quality product will not be able to achieve its efficiency. Water-based mold release agents generally do not contain solid particles. When using, the water can be diluted ten times to hundreds of times, and the water content generally accounts for more than 95%.
Disclaimer: The picture materials and articles on this platform are from the Internet, so the copyright belongs to the original author. If your copyright and interests are infringed, please contact us, we will apologize and delete it quickly. Article source: InternetThe release agent is a functional material between the mold and the product. In the rubber and plastic manufacturing industry, in order to demold, improve production efficiency, extend the service life of the mold, make the product clean and qualified, and reduce waste, it is an essential additive.
The mold release agent is divided into internal mold release agent and external mold release agent. For various reasons, internal mold release agents are rarely used, and external mold release agents are still widely used.
The external release agent is generally composed of a medium and a release active substance. The medium is generally an organic solvent or water. Silicone oils, waxes and oils are common among mold release actives. The medium in the currently used external mold release agents is generally organic solvents such as halogenated hydrocarbons and aliphatic hydrocarbons. Since the organic solvents used are usually toxic or flammable and pollute the environment, water as a solvent does not have these disadvantages. The development and application of water-based mold release agents have been developed abroad, and quite a few products have appeared.
China is still in its infancy in this field. At present, the market consumption of water-based mold release agents is gradually increasing. With the improvement of people's awareness of environmental protection, its consumption will definitely increase. Therefore, my country should pay full attention to the research and development of water-based mold release agents, so water-based mold release agents using water as a medium have attracted widespread attention.
Types of water-based release agents: mainly divided into silicone oil type, wax type, etc.
1) Silicone oil water-based release agent
Silicone oil and silicone oil derivatives are more suitable as polyurethane mold release agents with good mold release properties, such as aluminum alloy casting mold release agents, which are composed of silicone oil, special pressure lubricant, emulsifier and water. Silicone oils and their derivatives have been shown to have good mold release over the years. But when the mold product needs secondary processing, such as post-coating, the silicone oil release agent has certain side effects.
2) Wax water-based release agent
The release agent used in polyurethane molding products is mainly wax, and wax has good release performance. In the early stages, waxes were added to organic solvents to make mold release agents. It has recently been reported that wax can be added to water to make a suspension water-based release agent. The wax used is a natural wax or a synthetic wax such as polyethylene wax. This release agent is mainly used in the production of flexible foams.
3) Fatty acid water-based mold release agent
This release agent contains higher fatty acid ester, fatty acid salt, other additives and water. For the production of hard and soft foam mold products.
High-quality mold release agent is mainly made of 15~25 kinds of raw materials. If a key ingredient or additive changes by 1%, its release properties can vary widely, which can also make a big difference in cost and price. Each release agent has its optimum application range and object. If the wrong object is used, a high-quality product will not be able to achieve its efficiency. Water-based mold release agents generally do not contain solid particles. When using, the water can be diluted ten times to hundreds of times, and the water content generally accounts for more than 95%.
Disclaimer: The picture materials and articles on this platform are from the Internet, so the copyright belongs to the original author. If your copyright and interests are infringed, please contact us, we will apologize and delete it quickly. Article source: Internet
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