What kind of glue is generally used for self-adhesive label paper

Self-adhesive label paper generally uses a variety of glues, according to different application needs and environmental conditions, common glues mainly include hot melt adhesive, hydrosol (or water glue) and oil glue. Here is a detailed description of these glues:

1. Hot melt glue

Characteristics: Hot melt adhesive is a rubber-based adhesive, with strong fluidity, high viscosity characteristics, suitable for low temperature environment (such as -5 ~10 degrees) for labeling, environmental protection and non-toxic.

Advantages: Environmental protection, strong viscosity, especially in the case of a trace of oil or water on the surface of the paste, the labeling effect is better than that of hydrosol.

Disadvantages: not high temperature (generally can only be used below 70 degrees), sensitive to temperature during processing, may become hard and brittle in low temperature environment, poor reattachment, and can not be attached to the PVC material.

Application: It is mainly used in the labeling environment that does not require too high temperature, such as food, medicine, supermarket labels, etc.

2. Hydrosol (hydrogel)

Characteristics: Hydrosol is an acrylic adhesive, strong viscosity, and the vast majority of hydrosol environmental protection non-toxic. Its temperature resistance is stronger than hot melt adhesive, can withstand temperatures below 90 degrees Celsius, and some hydrosol can even withstand high temperatures of about 150 degrees.

Advantages: Environmentally friendly, non-toxic, strong temperature resistance, and over time, its stickiness will gradually increase, making the label more difficult to uncover.

Disadvantages: low temperature labeling performance is poor, when there is slight water or oil stains on the paste, the viscosity of the hydrosol will be affected.

Application: Widely used in food, medicine, daily chemical products and some of the environmental requirements of strict industrial supplies labels.

3. Oil glue

Characteristics: Oil glue is not an "oil" in the true sense, but a soft monomer such as acrylate or vinyl acetate that remains sticky after curing. Its adhesive force is strong and can be pasted repeatedly.

Advantages: strong adhesion, good waterproof performance, suitable for a variety of substrates and complex environments.

Disadvantages: Compared with hydrosol and hot melt adhesive, the price may be slightly higher.

Applications: Use in situations where strong adhesion or waterproof performance is required, such as outdoor environments or occasions where multiple label changes are required.

Sum up

Adhesive labels generally use a variety of glue, the specific choice of glue depends on the application needs and environmental conditions. Hot melt adhesive is suitable for low temperature, environmental protection and non-toxic labeling environment; Hydrosol is favored for its strong viscosity and temperature resistance. The oil adhesive plays an important role in specific occasions because of its strong adhesion and waterproof performance. In practical applications, it is necessary to choose the right type of glue according to the specific situation.