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    Home > Coatings News > Paints and Coatings Market > What are the technical aspects of adhesive?

    What are the technical aspects of adhesive?

    • Last Update: 2021-01-29
    • Source: Internet
    • Author: User
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    Although adhesive is only a supporting material in building decoration, it does not mean that it is not important. The actual decoration of a large number of materials (such as wallpapers, all kinds of flooring, ceramics, stone decorative materials, etc.) are laid by paste method, so the selection of adhesive is appropriate or not directly affect the degree of solidity of laying, but also affect the decorative effect of the finish. When choosing adhesives, we should first understand their basic technical properties, which are the basic conditions to ensure the degree of bonding

    .
    the technical properties of adhesives are:
    (1), process
    refers to the performance of adhesives related to bonding operation, there are adhesive modulation, coating, drying, curing conditions, etc., but also the adhesive operation is difficult to evaluate. As mentioned earlier, multi-group adhesives to be mated in the field, chemical reaction adhesives have curing reaction temperature conditions, solvent-based adhesives need to be dry after applying the glue for a period of time. between, until the solvent volatile can not bond and so on, these problems in the choice of the use of adhesive must be clear, in order to ensure the bonding effect.
    (2), bonding strength
    is a performance indicator to ensure the firmness of bonding. Bonding strength is not enough, will make the sticky off, if the wall decoration, the sticky will fall off, not only affect the quality of decoration, sometimes cause injury accidents.
    (3), stability
    refers to the degree to which the strength of the bonding test piece is impregnated at a specified medium for a certain period of time. Such as water resistance, oil resistance, etc. Commonly used measured strength or with strength hold rate. For the adhesive to bond the surface, exterior wall or bathroom, toilet and other places of the finish material, to have good stability.
    (4), Durability (or Aging Resistance)
    Bonding layers age over time until they lose bonding strength, a performance known as durability. Because now the largest amount of adhesive is synthetic resin or synthetic rubber-based organic polymer materials, in the process of use easy to age and become bad, so that the bonding layer is ineffective and fall off.
    (5), temperature resistance
    temperature resistance refers to the performance of adhesive in the specified temperature range changes. These include heat resistance (under high temperature ambient conditions), cold resistance (under low temperature ambient conditions), and high and low temperature change resistance. These temperature changes can also change the composition of the adhesive, reducing the bonding strength until the adhesive layer falls off.
    (6), weather resistance
    is designed for externally exposed adhesives and is weather resistant to properties such as rain, sunlight, blizzards, and moisture, known as weather resistance. Weather resistance also reflects the aging resistance of the bonding layer under the long-term effect of natural conditions. It is also because these natural factors can cause the bonding layer performance to go bad, affecting the bonding strength.
    (7), chemical resistance
    Most synthetic resin adhesives and some natural resin adhesives, under the role of chemical media will be dissolved, expanded, aging or corrosion and other different changes, resulting in a decrease in bonding strength.
    (8), other performance
    in addition to the above described several properties (i.e., a variety of environmental conditions, such as temperature, humidity, sunlight, chemical media, such as the adhesive bonding strength of the bonding layer, a comprehensive reflection of the use of the bonding layer Effect) In the selection of adhesive must be considered, should also consider other properties of adhesive, such as: whether there is a irritating odor, toxicity, adhesive color, storage stability, storage period and price and so on.
    adhesives used indoors should be free of irritating odors and non-toxicity, and if odorous adhesives must be used, they should be used after the adhesive layer is completely dry. Choose a similar color or white adhesive according to the color of the adhesive, so as not to pollute the finish, affecting the decorative effect of the finish. In addition, attention should also be paid to the storage period of adhesives, because after the storage period of adhesives, its actual bonding performance (especially the bonding strength of adhesives) will be greatly reduced, thereby affecting the bonding effect.
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