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The weather resistance of hot melt adhesive affects its application effect. Hot melt adhesive manufacturers need to adjust the heat resistance of hot melt adhesive according to different application environments to achieve ideal application performance.
The heat resistance of hot melt adhesive is closely related to its softening point. Hot melt adhesives with good heat resistance generally have a higher softening point. This hot melt adhesive is not easily affected by high temperatures and does not affect the bonding effect. But it does not mean that the softening point needs to be raised. High heat resistance indicates that the hot melt adhesive produced by the hot melt adhesive manufacturer has excellent performance.
Hot melt adhesive is needed in the hot south, but not necessarily in the cold north. Due to the generally cold temperature in the north, hot melt adhesives with good heat resistance have a high softening point, which makes it easy to produce when the optimal performance cannot be achieved during the production process, resulting in the inability of the adhesive liquid and the surface of the adhered material to achieve ideal penetration, ultimately affecting the bonding effect. Moreover, if the penetration of hot melt adhesive into the adhesive is insufficient, in cold weather, hot melt adhesive is generally harder and prone to delamination. Therefore, if using hot melt adhesive in areas with relatively low temperatures, one should choose one with a slightly lower softening point. It doesn’t matter if the heat resistance is poor. Mainly, attention should be paid to the fluidity and permeability of hot melt adhesive during use. Of course, if the product is to be sold to areas with higher temperatures, and the temperature in the hot melt adhesive application area is relatively low, it is necessary to choose hot melt adhesive products with higher heat resistance according to the actual situation.
Corresponding to the heat resistance of hot melt adhesive is its cold resistance. Hot melt adhesive has good heat or cold resistance. Hot melt adhesive manufacturers have segmented hot melt adhesives in their application environments. Heat resistance is generally a performance indicator of hot melt adhesive used in hot weather.
Answer directly The cover of the express envelope is self-adhesive, and it is recommended to use one that has fast initial adhesion, good adhesion to PE and paperHot melt adhesive granulesApply a strip-shaped adhesive line, and the sealing can be controlled by sticking or tearing. The key lies in the opening time and the balance […]
Hot melt adhesive granulesCan PET film be adhered? Yes, but it depends on the particle type and usage method. PET (polyethylene terephthalate) film has low surface energy and weak polarity, and ordinary EVA hot melt adhesive particles are prone to “false adhesion” and easy to peel off when directly adhered. To firmly adhere PET, a […]
The root cause of UV ink printing surface not sticking to hot melt adhesive isThe surface energy of the cured UV ink layer is extremely low (usually below 34 dynes), and the adhesive cannot wet and spreadIt can only stop on the surface to form a “false adhesion”, and when subjected to a slight force, […]
First, give the conclusion:Hot melt adhesive granulesForming through four steps of “heating coating pressing cooling” Hot melt adhesive particles are solid particles at room temperature and cannot directly adhere to objects. It needs to be heated to 160-190 ℃ using a glue pot or granule gluing machine to melt into a liquid state, applied to […]
