Development and application of organic silicon release agent-Iota

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Service > Development and application of organic silicon release agent

Development and application of organic silicon release agent

People's understanding on the pressure-sensitive adhesive began in ancient times. The ancient Egyptians will, beans, milk fat and bone glue viscous material coated on the linen, used for dressing wounds. This is the original rubber. The early pressure sensitive adhesive is used to fix the wound surface wrapped with the adhesive. At that time did not use the type of agent.
Since the beginning of the 20th century, the emergence of polymer materials developed natural rubber and synthetic resin (such as acrylic resin, etc.) of the adhesive, pressure sensitive adhesive applications from medical expanded to industrial and civil fields. Pressure sensitive adhesive (PSA) is often used to all kinds of tape, labels and film preparation, used in packaging, decoration, electronic and electrical, signs, construction and other industries. Using this kind of pressure sensitive adhesive products and inseparable from the agent with, or for the viscous pressure-sensitive adhesive tape to will become the roll of tape used separately; therefore, from a variety of paper (or membrane) arises at the historic moment, mainly to sticky substances in isolation.
Silicone has special molecular structure, the side chain methyl make it has the characteristics of low surface energy, extremely free rotation of the siloxane backbone display its viscoelastic properties and flexible chain segments can be free movement. Therefore, silicone is generally recognized as one of the key materials for the design of the coating and pressure sensitive adhesive. Silicone release agent uses more widely, except for the use of the pressure sensitive adhesive supporting, can also used for various industrial anti adhesive packaging, food anti adhesive packaging, synthetic leather and permanent release agent for paper isolation agent is mainly used for instant paste isolation paper, sanitary napkin the isolation paper.
With the application of the expansion, the type of agent is not only coated on the paper, but also can be coated on the back of the adhesive tape. Adhesive tape substrate is not a paper, such as electrical tape substrate is coated glass fiber mesh cloth, the front of it is a pressure sensitive adhesive, back to paper coating isolation agent (also known as "the silicone release agent)
The popular pressure sensitive adhesive is a kind of rubber and acrylic resin, which is called organic pressure sensitive adhesive, but they can not meet the demand of high technology application. Silicone pressure sensitive adhesive has filled the blank of high performance, which meets the special needs of industry. The stability of high and low temperature, excellent electrical properties, chemical resistance, resistance to chemical resistance, and physiological inertia of the organic silicon. Silicone pressure sensitive adhesive liquid coating in various thin films of high temperature, high temperature fiber fabric or insulating materials such as paper surface, made of a variety of adhesive tape products, can be tape can also be cutting red type into various shapes, so as to meet the needs of various high performance process.
Its main application areas are: Printed Electronics assembly, flexible circuit, brake system and medical tape, etc.. Transfer decals, release paper, aircraft, aviation and the application of thermal spraying and so on. Silicone type agent can not be used in conjunction with silicone pressure sensitive adhesive, for this purpose, the development of fluorine silicon type of agent.
Using a silicone from the agent's main purpose is with pressure sensitive adhesive has the advantages of convenient use, played the role of viscous spacer; therefore requested from the agent to the surface energy is low, lubricity and wetting of the number, viscoelastic, good resistance to high temperature performance, good weather resistance, good electrical properties, so that you can in a variety of pressure-sensitive adhesive. Organic silicon materials meet these requirements completely. But to attract attention, from the group of agents cannot be transferred to the surface of the adhesive and the influence of the viscosity of the pressure sensitive adhesive, specific performance in ensuring the pressure-sensitive adhesive for quick stick force and stripping force is not affected, or pressure-sensitive adhesive on the failure, and adherend from. If the low molecular weight content of silicone is too high or when the film is coated with the type of agent, the film is not completely cured. Therefore, it is necessary to use the organic silicon material of the volatile should be as low as possible, the formula and the production process of the type of the agent bath must be guaranteed.

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