Although adhesives are only the supporting materials in building decoration, it does not mean that it is not important. The actual decoration of a large number of materials (such as wallpaper, all kinds of flooring, ceramics, stone decorative materials, etc.) are pasted using the paste method, so the choice of adhesive is directly affect the reliability of the laying, but also affect the decoration The decorative effect of the surface. When selecting an adhesive, it is first necessary to understand its basic technical properties, which are the basic conditions for ensuring the degree of adhesion. The technical properties of adhesives are:
(l) Processability: Refers to the performance of the adhesive in relation to the bonding operation, including the modulation of the adhesive, the application of glue, the setting of the air, and the curing conditions, and is also an evaluation of the ease of the bonding operation. As mentioned above, multi-component adhesives are to be deployed in the field. Chemically reactive adhesives require curing reaction temperature conditions. Solvent-based adhesives need to be left open for a period of time after being glued. Between time, until the solvent volatilizes to bond, etc., these problems must be clear when selecting the adhesive to ensure the bonding effect.
(2) Bonding strength: It is a performance index that guarantees the firmness of bonding. Adhesive strength is not enough, it will make the adherend fall off, if the wall decoration, stickies will fall off, not only affect the quality of decoration, and sometimes cause injuries.
(3) Stability: The degree of change in strength of a bonded specimen after it has been immersed in a given medium for a period of time at a certain temperature. Such as water resistance, oil resistance and so on. The commonly used measured intensity is expressed or expressed as the intensity retention rate. For the adhesive to be bonded to the floor, outer wall or the bathroom, toilets, etc., the adhesive must have good stability.
(4) Durability (or aging resistance): As the adhesive layer grows with the use of time, its performance will gradually deteriorate until the adhesive strength is lost. This performance is called durability. Because the largest amount of adhesive is now based on synthetic resin or synthetic rubber-based organic polymer materials, aging and deterioration in the use of the process, so that the adhesive layer lose effectiveness and fall off.
(5) Temperature resistance: Temperature resistance refers to the change of performance of the adhesive within the specified temperature range. Including heat resistance (in high temperature conditions), cold resistance (in low temperature conditions) and resistance to high and low temperature changes. These temperature changes will also change the composition of the adhesive, so that the bond strength is reduced until the adhesive layer falls off.
(6) Weather resistance: It is resistant to weather, such as rain, sunlight, wind and snow, and moisture, and is called weather resistance when it is exposed to the outdoors. The weather resistance also reflects the performance of the adhesive layer under the long-term effect of the adhesive under the natural conditions. It is also because these natural factors will cause the performance of the adhesive layer to deteriorate and affect the bonding strength.
(7) Chemical Resistance: Most synthetic resin adhesives and some natural resin adhesives will undergo different changes such as dissolution, swelling, aging, or corrosion under the action of chemical media, resulting in a decrease in adhesive strength.
(8) Other properties: In addition to the several properties described above (ie, various environmental conditions, such as temperature, humidity, sunlight, chemical media, etc., the impact of the adhesive layer adhesive strength, comprehensive reflection of the adhesive layer The use of effects) must be considered when selecting the adhesive, other properties of the adhesive should also be considered, such as: no irritating odor, no toxicity, how the color of the adhesive, storage stability, how long the storage period and the price level Wait. For indoor use adhesives should be no irritating odor, no toxicity, if you must use scented adhesive, then the adhesive layer should be completely dry before use. According to the color of the adhered object, a similar color or white adhesive is selected to prevent the color of the adhesive from contaminating the decorative surface and affecting the decorative effect of the decorative surface. In addition, the storage period of the adhesive should also be noted, because after the storage period of the adhesive, the actual bonding performance (especially the adhesive strength) will be greatly reduced, thus affecting the bonding effect.
In short, when selecting the adhesive, the user can directly understand the processability and other properties of the adhesive, which can be obtained through observation or use requirements. While using the bar one. The performance of the adhesive under the parts is different for different conditions of use, such as the indoor and outdoor surfaces, and the user can use it according to the use environment.
Reprinted from: Wanke Chemical Online
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