The difference between 4 self-adhesive label glues

Today, I will talk about the difference between self-adhesive label glue.

Self-adhesive label glue mainly includes hot melt glue, water-based glue, solvent-based glue and organic silicone glue.

They differ in composition, characteristics, application scenarios, etc.

The following is a detailed introduction:

Element

• Hot melt adhesive : usually composed of thermoplastic resin, tackifier, wax and antioxidant.
• Water-based adhesive : uses water as solvent, and its main ingredients include polymers such as acrylic emulsion, ethylene-vinyl acetate emulsion, as well as additives such as thickeners and preservatives.
• Solvent -based adhesive : uses organic solvents as carriers, and its main components include polymers such as natural rubber , synthetic rubber, acrylates , as well as plasticizers, stabilizers , etc.
• Organic silicone : The main component is siloxane polymer, and auxiliary agents such as cross-linking agents and catalysts are also added.

Characteristic

• Hot melt adhesive
  • Fast curing speed : After coating at high temperature, it can cool and solidify quickly, and subsequent operations such as labeling can be carried out quickly.
  • Good initial adhesion : can quickly adhere to the surface of the object to prevent the label from shifting.
  • Good low temperature resistance : it can still maintain a certain viscosity and flexibility in low temperature environment.
• Water-based glue
  • Good environmental protection : It uses water as solvent and contains almost no harmful volatile substances, which meets environmental protection requirements.
  • Slow drying : It takes longer to dry, especially in a humid environment.
  • Stable viscosity : It has good adhesion to a variety of materials and the viscosity is long-lasting.
• Solvent-based adhesive
  • Strong adhesion : It has strong adhesion to various materials and can adapt to objects with different surface properties.
  • Fast drying speed : The solvent evaporates quickly at room temperature and the glue can dry and solidify quickly.
  • Good water resistance : The film formed after curing has good water resistance.
• Organic silicone
  • Excellent high temperature resistance : It can be used for a long time in a high temperature environment above 200℃ and still maintain good viscosity and stability.
  • Good chemical stability : good tolerance to acids, alkalis, salts and other chemical substances.
  • High peel strength : It can be firmly adhered to the surface of various materials, and when it needs to be peeled off, there will be no glue residue or damage to the surface of the adhered object.

Application Scenario

• Hot melt adhesive : commonly used for labeling fast-moving consumer goods such as food, beverages, and daily chemicals, such as beer and beverage bottle labeling.
• Water-based adhesive : Suitable for fields with high environmental protection requirements, such as the pasting of labels on pharmaceutical and food packaging, and is also commonly used for the pasting of materials such as paper and cardboard.
• Solvent-based adhesive : widely used in labeling of plastic, metal and other materials, such as cosmetic packaging, electronic product shell labeling, etc.
• Organic silicone : Mainly used for labeling in high-temperature environments, such as automotive engine parts, electronic components, etc., and also used in some occasions with high requirements for chemical stability and weather resistance.

Cost

• Hot melt adhesive : The cost is relatively moderate, but the equipment investment is high, and hot melt adhesive coating equipment is required.
• Water-based adhesive : The cost is low, and the storage and transportation of water-based adhesive are relatively safe, without the need for special fire and explosion prevention measures.
• Solvent-based adhesive : The cost is relatively high, mainly due to the high cost of organic solvents, and strict safety protection measures need to be taken during production and use, which increases the cost.
• Organic silicone : The cost is the highest, but its performance is excellent and it plays an irreplaceable role in some specific fields.