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What is the ratio of solvent-free and self-adhesive in the operation of the compound machine
Aug 01, 2018

As a low-carbon printing equipment, solvent-free laminating machine has a wide range of applications today, mainly using solvent-free adhesives to match two or more substrates, from the first generation of solvent-free laminating machines. It has been developed for the fourth generation, and it has development advantages in low carbon environmental protection, energy saving and high efficiency.

Solvent-free composite technology has been introduced into China for decades, and due to various practical factors, it has not achieved the popular development like dry compounding. With the increasing awareness of environmental protection among Chinese users, solvent-free compounding has achieved considerable growth in the past one or two years, and there has been a historic breakthrough in the number of installed units. Solvent-free compounding has begun to occupy the mainstream position in the composite field.

The structural form of the self-adhesive material includes: surface coating and undercoating

1 The specific role of the surface coating: in order to change the surface properties of the surface material.

Such as improving surface tension, changing color, adding a protective layer, etc., to better accept ink and easy to print, to prevent dirt, increase ink adhesion and prevent printed graphics from falling off. Surface coating is mainly used for non-absorbent materials such as aluminum foil, aluminized paper and various film materials. Generally, paper materials do not need to be coated, but special fabrics such as thermal paper and thermal transfer paper require surface coating.

2 The approximate form of the primer layer is similar to the surface coating, but is applied to the back side of the face material. The main purpose of the primer layer is as follows: to protect the face material and prevent the penetration of the adhesive.

For porous materials, thin low-density materials generally use a primer process, the purpose is to add a protective layer on the adhesive, and the self-adhesive material structure of the self-adhesive coater prevents the adhesive from penetrating into the surface material. Prevents the plasticizer in the plastic face material from penetrating into the adhesive, affecting the performance of the adhesive, resulting in a decrease in the adhesion of the label and a loss of the label. Mainly used for materials.

Increase the opacity of the fabric. It is generally coated with black to prevent the color and text under the label from passing through the surface material after labeling. For example, the special label for modifying the wrong information in the office supplies, and the new price label attached to the surface of the original price label in the supermarket. Increase the adhesion between the adhesive and the facestock. It is mainly used for removable adhesives to prevent the adhesive from falling off the surface of the product when it is removed from the surface of the product. Such as labels on the glasses, labels on the microwave oven door, etc.

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