How to Choose an Acrylic Pressure Sensitive Glue Suitable for Your Own Production?

Different materials have different surface properties, and the bonding requirements for glue are not the same.

 

To choose an acrylic pressure sensitive glue suitable for your own production, you need to consider many factors, the following are some suggestions:

 

 

 

1. Clear usage requirements and environment:

 

Adhesive material type: Different materials have different surface properties, and the bonding requirements for glue are not the same. For example, for common materials such as plastics, metals, paper, wood, etc., it is necessary to ensure that acrylic pressure-sensitive glue has good adhesion to it. If it is a low surface energy material such as polyolefin, it may be necessary to choose a glue with a special formula design and strong adhesion to low surface energy materials.

 

Use environmental conditions: Consider the temperature, humidity, whether there is chemical contact and other factors in the production environment. If it is used in a high temperature environment, it is necessary to choose a glue with good high temperature resistance to avoid problems such as glue softening and bond reduction at high temperatures. If the ambient humidity is large, the product with good water resistance should be selected to prevent the performance of the glue from being affected after water absorption; If it is possible to come into contact with chemical solvents, then the glue needs to have good solvent resistance.

 

Bond strength requirements: Determine the required bond strength according to the specific application scenario of the product. For example, for products that need to be fixed for a long time and withstand large tensile or shear forces, such as auto parts, building materials, etc., it is necessary to choose acrylic pressure-sensitive glue with high bond strength and high cohesion; For some applications that are temporarily fixed and need to be easily removed, such as labels, notes, etc., the bond strength is moderate, so that it can be easily removed and no glue remains when needed.

 

 

2. Pay attention to the glue performance parameters:

 

Initial viscosity: Initial viscosity refers to the adhesive force generated by the rapid wetting of the substrate surface by the glue under small pressure, and the good initial viscosity glue can quickly adhere to the surface of the material in a short time to improve production efficiency. Sample tests can be used to assess whether the initial viscosity of the glue meets the production requirements.

 

Peeling strength: Peeling strength reflects the size of the adhesive force between the glue and the surface of the adhesive, and is an important indicator to measure the bonding performance of pressure-sensitive glue. The higher the peel strength, the stronger the bond between the glue and the material, but too high peel strength may cause damage to the surface of the material when removed. Select the glue with the appropriate peel strength for the specific application.

 

Stickiness: stickiness refers to the ability of glue to resist persistent shear creep damage, that is, the ability of glue to maintain bond under long-term stress. For products that need to maintain a long-term bond state, such as tapes, protective films, etc., stickiness is a very important performance indicator.

 

 

3. Consider the form and construction method of glue:

 

Form: acrylic pressure sensitive glue has different forms such as solvent-based, emulsion, light curing and hot melt.

 

1) Solvent-based glue has large initial adhesion, good wettability and fast drying speed, but there are problems such as volatilization of organic solvents, environmental protection and safety;

2) Emulsion glue has the advantages of low cost and environmental protection, but poor water resistance and slow drying speed;

3) Photocuring glue has short curing time, high efficiency and green environmental protection, but it has requirements for light penetration and high equipment cost;

4) Hot melt glue does not contain organic solvents, no pollution, simple formula, but the cohesion strength is low at high temperature, and the melting viscosity is high.

 

Construction method: According to the production process and equipment, choose the appropriate construction method. If it is manual operation, you can choose a glue that is easy to coat and has a moderate drying speed; If it is an automated production line, it is necessary to consider whether the viscosity and drying speed of the glue match the production equipment to ensure the smooth progress of production.

4. Evaluate the stability and shelf life of the glue:

 

Stability: The glue should maintain the stability of the performance during storage and use to avoid delamination, precipitation, gel and other phenomena. You can ask the supplier about the storage conditions of the glue and the performance changes during the shelf life, or perform sample tests to verify the stability of the glue.

 

Shelf life: Choose glue with a long shelf life, which can reduce the performance decline and waste caused by the expiration of glue. At the same time, pay attention to the storage conditions of the glue, and store it according to the recommendations of the supplier to ensure the quality of the glue during the shelf life.

 

5. Supplier selection:

 

Supplier qualification and reputation: The selection of suppliers with good qualification and reputation can ensure the quality of glue and the stability of supply. You can check the supplier's qualification certificate, customer evaluation, industry reputation and other ways to understand the credibility of the supplier.

 

Technical support and after-sales service: Whether the supplier can provide professional technical support and after-sales service is also very important. When choosing glue, you can communicate with the supplier to understand whether they can provide the use of glue guidance, technical training, problem solving and other services, so that when the problem is encountered in the use process, it can be solved in time.