Hot Melt adhesives in industrial production is also very wide, in the use of hot melt adhesives, many customers

will reflect the phenomenon of non-stick Glue. However, most of the actual users have no in-depth understanding

ofhot melt adhesive, which leads to various troubles in the production process. How to improve the bonding

strength of hot melt adhesive a total of eight points, today, Qingdao Sainuo polyethylene wax manufacturers first

take you to understand the first four.

1. Improve surface roughness

When the adhesive soaks well on the surface of the bonded material (contact angle θ < 90 °) , the roughness of the

surface is favorable to increase the degree of the liquid of the adhesive soaks on the surface and the density of the

contact point between the adhesive and the bonded material, thus is advantageous in enhances the bonding

strength.

2. Surface treatment

Due to the “weak boundary layer” formed by the oxide layer (such as rust), chromium plating layer, phosphating

layer, release agent, etc. of the adhered material, the surface treatment of the adherend will affect the bonding

strength, and the surface treatment of aluminum and aluminum alloys It is hoped that aluminum oxide crystals

will be generated on the aluminum surface, while the naturally oxidized aluminum surface is very irregular, and

the relatively loose aluminum oxide layer is not conducive to bonding.

3. Penetration

Bonded joints are often infiltrated into some other low molecules due to the environmental atmosphere. For

example, when the joint is in a humid environment or underwater, water molecules penetrate into the adhesive

layer; the polymer adhesive layer is in an organic solvent, and solvent molecules penetrate Into the polymer, the

penetration of low molecules first deforms the adhesive layer, and then enters the interface between the adhesive

layer and the adherend, which reduces the strength of the adhesive layer, which leads to the destruction of the

adhesion.

4. Migrate

Adhesive materials containing plasticizers. Because these small molecules have poor compatibility with polymer

macromolecules, they are easy to migrate from the polymer surface or interface. If the migrated small molecules

gather on the interface, it will hinder the adhesive and The bonding of the material to be bonded causes bonding

failure.

Qingdao Sainuo Chemical Co.,Ltd. We are manufacturer for PE wax, PP wax, OPE wax, EVA wax, PEMA, EBS,

Zinc/ Calcium Stearate…. Our products have passed the REACH, ROHS, PAHS, FDA testing.

Sainuo rest assured wax, welcome your inquiry!

Website：https://www.sanowax.com

E-mail：sales@qdsainuo.com

               sales1@qdsainuo.com

Adress：Room 2702,Block B, Suning Building, Jingkou Road, Licang District, Qingdao,China