How to choose adhesives

When choosing adhesives, you should first understand their basic technical properties, which are the basic conditions to ensure the degree of bonding. The technical properties of adhesives include: processability, bonding strength, stability, durability (or aging resistance), temperature resistance, weather resistance and chemical resistance, etc.

Although adhesives are only supporting materials in building decoration, it does not mean that they are not important. In actual decoration, a large number of materials (such as wallpaper, various floors, ceramics, stone decorative materials, etc.) are laid by pasting, so the appropriateness of the selection of adhesives directly affects the firmness of the laying and the decorative effect of the surface. When choosing adhesives, you 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. Processability: refers to the performance of adhesives in terms of bonding operations, including the modulation, coating, airing, and curing conditions of adhesives, which is also an evaluation of the difficulty of bonding operations. As mentioned above, multi-component adhesives must be prepared on site, chemical reaction adhesives have temperature requirements for curing reactions, and solvent-based adhesives need to be left to air for a period of time after application until the solvent evaporates before bonding. These issues must be clarified when choosing to use adhesives to ensure the bonding effect.

2. Bonding strength: It is a performance indicator to ensure the firmness of bonding. If the bonding strength is not enough, the adherend will fall off. If it is a wall decoration, the adherend will fall off, which will not only affect the decoration quality, but sometimes cause injuries.

3. Stability: refers to the degree of strength change of the bonding specimen after it is immersed in a specified medium at a certain temperature for a period of time. Such as water resistance, oil resistance, etc. It is usually expressed by measured strength or strength retention rate. For adhesives that are to be bonded to finishing materials on the ground, exterior walls, or bathrooms, toilets, etc., they must have good stability.

4. Durability (or aging resistance): As the bonding layer grows in use, its performance will gradually age until it loses its bonding strength. This performance is called durability. Because the adhesive with the largest usage now is an organic polymer material based on synthetic resin or synthetic rubber, it is easy to age and deteriorate during use, causing the adhesive layer to lose its effectiveness and fall off.

5. Temperature resistance: Temperature resistance refers to the change in the performance of the adhesive within the specified temperature range. Including heat resistance (under high temperature environment conditions), cold resistance (under low temperature environment conditions) and resistance to high and low temperature changes. These temperature changes will also change the composition of the adhesive, thereby reducing the bonding strength until the adhesive layer falls off.

6. Weather resistance: For adhesive parts exposed to the outdoors, their ability to withstand weather, such as rain, sunlight, wind, snow and water, is called weather resistance. Weather resistance also reflects the aging resistance of the adhesive layer under the long-term action of 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, expansion, aging or corrosion under the action of chemical media, which will cause a decrease in bonding strength.

8. Other properties: In addition to the above-mentioned properties (that is, the influence of various environmental conditions, such as temperature, humidity, sunlight, chemical media, etc. on the bonding strength of the adhesive layer of the adhesive, which comprehensively reflects the use effect of the adhesive layer), other properties of the adhesive should also be considered when selecting adhesives, such as: whether there is a pungent odor, whether there is toxicity, the color of the adhesive, the storage stability, the storage period, and the price, etc. Adhesives for indoor use should not have a pungent odor or toxicity. If an odorous adhesive must be used, it should be used after the bonding layer is completely dry. Choose adhesives of similar colors or white according to the color of the object to be adhered, so as to prevent the color of the adhesive from contaminating the finish and affecting the decorative effect of the finish. In addition, attention should also be paid to the storage period of the adhesive, because the actual bonding performance (especially the bonding strength of the adhesive) of the adhesive after the storage period will be greatly reduced, thus affecting the bonding effect.

In short, when choosing an adhesive, users can directly understand the processability and other properties of the adhesive, which can be obtained through observation or usage requirements. The performance of the adhesive under the conditions of use has different emphasis on different use conditions, such as indoor and outdoor. Users can choose it in a targeted manner according to the use environment.