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Rubber Release Agent Heat Resistance, Stain Resistance

May 12, 2017

Brief Analysis on the Kind, Function and Application of Rubber Release Agent

The release agent is a functional substance between the mold and the finished product. The release agent is chemically resistant and is not dissolved when contacted with the chemical constituents of different resins, especially styrene and amines. The release agent also has heat and stress properties, is not easy to break down or wear; release agent bonded to the mold without being transferred to the workpiece to be processed, without prejudice to painting or other secondary processing operations. As the injection molding, extrusion, calendering, molding, laminating and other processes of rapid development, the amount of release agent is also greatly improved.

Rubber Release Agent In theory, the release agent has a large tensile strength so that it is not easily polished when it is in constant contact with the molded resin. This is especially true when there are frosted mineral fillers or glass fiber reinforcements in the resin. The release agent is chemically resistant and is not dissolved when contacted with the chemical constituents of different resins, Rubber Release Agent especially styrene and amines. The release agent also has heat and stress properties, is not easy to break down or wear; release agent bonded to the mold without being transferred to the workpiece to be processed, without prejudice to painting or other secondary processing operations.

The effect of the release agent is to smooth the molded product from the mold to obtain a smooth and smooth product and to ensure that the mold is used multiple times

The specific principle of release agent is as follows:

1, the polar chemical bond and the mold surface through the interaction to form a regenerative adsorption of the film;

2, the siloxane bond in the polysiloxane can be regarded as a weak dipole (Si + -O-). When the release agent spreads into a single orientation on the surface of the mold, the molecule takes a unique stretch chain configuration;

3, the free surface is covered by the accumulation of alkyl groups, the stripping ability increases with the alkyl density; but when the alkyl has a large steric hindrance, the extension configuration is limited, the stripping ability will be reduced;

4, the release agent molecular weight and viscosity are also related to the stripping ability, molecular weight, spreadability is good, but poor heat resistance.

The specific performance requirements of the release agent are as follows:

1, releasability (lubricity). Forming a uniform film and the shape of the complex shape, the size is accurate.

2, stripping good continuity.

3, the appearance of the appearance of smooth and beautiful appearance, not due to brushing sticky release agent and lead to dust adhesion.

4, secondary processing superior. When the release agent is transferred to the molded article, there is no adverse effect on the plating, hot stamping, printing, finishing, and bonding.

5, easy coating.

6, heat resistance.

7, pollution resistance.

8, forming well, high production efficiency.

9, good stability. With the combination of materials and materials, its physical and chemical properties and stability.

10, non-flammable, low odor, low toxicity.