How to judge the quality of hot melt adhesive film adhesive

To determine the quality of the hot melt adhesive adhesive, the quality can generally be measured from several aspects such as adhesion strength, drying speed, viscosity, solid content and PH value. Today's hot melt adhesive film manufacturers how fast and good the province Xiaobian told everyone that is those aspects.

1. Adhesion strength

The adhesive must first have sufficient adhesion strength to ensure the normal use of the bonded object. To determine whether the adhesive adhesion strength is qualified, the two pieces of bonded material can be torn along the bonding interface, and if the adhesive material is destroyed after tearing, it proves that the adhesion strength is sufficient; If only the adhesive interface is separated, it indicates that the adhesive strength is insufficient.

2. Drying speed

When choosing an adhesive, it is necessary to measure whether the drying speed matches the bonding process. The general manual bonding process is slow and requires a long initial drying time; The machine bonding process is fast and requires a short initial drying time. For thorough drying time, in most cases the sooner the better, so that the next step can be entered as soon as possible.

3. Viscosity

Viscosity is an important factor affecting the quality of adhesives. If the viscosity is too large, the coating is thicker, the amount of glue consumed, the drying is slowed down, and it will also affect the wetting and penetration of the adhesive on the surface of the adhesive, which in turn directly affects the adhesion strength; If the viscosity is too small, the coating is thin, the drying is too fast, and it is easy to have problems such as poor adhesion.

4. Solid content

Solid content is also one of the important factors affecting the quality of adhesives. The higher the solid content, the stronger the adhesion force and the faster the drying speed.

5. pH

Hot melt adhesive film synthetic resin adhesives are mostly weakly acidic and will not have a negative impact on the bonding process. However, water glass and starch adhesives are more alkaline, and the high alkalinity will not only have a corrosive effect on the operators and equipment, but also sometimes corrode the sticky and form marks that affect the appearance. Therefore, when purchasing adhesives, consider the impact of pH on the product.

Jiangmen M.F.B.S. Machinery Co., Ltd. is a company specializing in R&D, production and sales: medical protective clothing, outdoor sports clothing, footwear, leisure clothing, yoga coffee clothing, bags and other industries of special heat sealing tape, hot melt adhesive film, decorative film, seamless lamination materials. Welcome to contact us.

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