Mold Release Agents: Types, Applications, and Benefits

A release agent is a general term for chemicals or additives used to improve demolding performance and prevent materials from sticking to metal molds.
Release agents are used in all manufacturing fields where materials are placed into molds for shaping, such as the food industry and industrial production.

Food Industry

• Automatic bread divider cutters used to divide dough before baking → liquid paraffin or vegetable wax
• Bread and confectionery molds → vegetable oil or butter
• Molds for foods such as takoyaki and taiyaki → vegetable oil

Industrial Applications

• Concrete → lubricating oil, organic solvents, etc.
• Casting → emulsified wax or water-based pigment coating agents, etc.
• Rubber and plastics → fluoropolymer or silicone resin release agents

Release agents applied directly onto the mold surface are called “external release agents.”
Release agents mixed with the material to improve demolding performance are called “internal release agents.”

Depending on the application field, product type, materials, and processing methods, the composition and usage of release agents may vary.

Release agents prevent materials from adhering to molds and reduce friction when removing molded products from the mold.

If materials adhere to the mold, the following disadvantages may occur:

• Reduced production speed of finished products
• Products cannot be formed according to the designed shape
• Possible reduction in the service life of the mold
• Increased workload for mold cleaning

When release agents are used properly, the following advantages can be obtained:

• Materials do not stick to the mold, allowing smooth and mass production
• Products can be accurately formed according to the designed shape
• Prevents mechanical failures caused by material adhesion
• Enables molding of parts with complex and fine shapes

In addition to improving production efficiency, release agents also provide other benefits. For example, they can often be used multiple times and help protect molds from mold growth and stains.

Fluoropolymer release agents form an extremely thin film. Only a very small amount transfers to the molded product, allowing the production of high-precision products and making secondary processing easier.