Haitao takes you to understand the misunderstanding of hot melt film operation

As a viscous composite film, hot melt adhesive film plays an important role in bonding and compounding between the same materials and different materials. There are many kinds of hot-melt film. It is especially important to choose different thickness and melting point according to different materials and requirements. This article will introduce how to choose hot-melt film for you and the matters needing attention in the actual operation of hot-melt film.

1. Method of selecting hot melt film:

Hot-melt film of different materials has different adhesion fastness to different materials. No film is suitable for all materials. For example, polyurethane hot-melt film has very strong fastness to textile fabrics and almost zero adhesion strength to PE plastics.

Material can withstand the heating of many high temperatures at the highest level; whether the product bonded with film should feel soft? Should it be applied in high or low temperature environment? How many grades of washing fastness should it reach? Should it be dry-cleaned? Should it continue to resist tension and tension? If there are above requirements, the film with the corresponding properties should be selected. There are many kinds of hot-melt film to choose, the most cost-effective hot-melt film; in order to meet your bonding requirements, choose the thinnest hot-melt film (the thinner the film, the cheaper the price).

2. Problems in Practice

Q1, TPU high temperature film composite TPU hot melt film why the uneven tail?

Solution:

1. The reason is that the temperature is too high and the unwinding tension is too large when the composite is used.

2. The shrinkage ratio of high temperature film and hot melt film is different.

3. Adjust the process properly according to the requirement and re-type it by heating.

Q2, TPU Hot Melt Adhesive Film Matching Equipment for Leather?

Solution: Hot ironing press, high frequency machine, high cycle fuse machine.

Q3, TPU hot melt adhesive bonding leather after blanking will have the reason for drawing edge glue?

Solution:

1. The tensile strength of the film is too high.

2. It is suggested to choose films with high hardness and good tensile strength.

Q4, TPU hot melt adhesives bonded to three layers of mesh and general standard requirements for folding resistance after leather?

Solution: Normal upper is tested between 80,000 and 100,000 times using related equipment.

Q5. How to enhance the bending resistance of TPU hot melt adhesive film after bonding?

Solution: Usually used on shoe upper, the temperature resistance point is above 100 C, and good operation technology can enhance the folding resistance.