Three Types of Adhesives for Self-Adhesive Label Printing Paper: How to Avoid Pitfalls When Purchasing!
In the process of purchasing self-adhesive labels, many people focus only on the face material (such as kraft paper, coated paper, PET, etc.), but overlook the most critical element—adhesive. In fact, whether a label can “stick firmly and last long” depends 90% on the type of adhesive! There are mainly three types of adhesives for self-adhesive labels available in the market: water-based adhesive, hot melt adhesive, and solvent-based adhesive. Choosing the wrong adhesive can lead to minor issues like label lifting and falling off, or even major problems like reworking an entire batch of products, causing significant losses. Today, we will delve into the characteristics, application scenarios, and purchasing pitfalls of these three types of adhesives. A super practical quick identification method is also included at the end of the article, so it is highly recommended to bookmark it!

I. Water-based Adhesive

Advantages:
•  Environmental Protection and Safety: Non-toxic and odorless, it meets the environmental requirements of the food and daily chemical industries.
•  Strong Post-Adhesion: Although the initial adhesion is average, the adhesion will significantly increase after 24 hours of application, becoming stronger over time.
Disadvantages:
•  Water and Oil Resistant: If the surface of the object to be labeled has slight water stains or oil, it will seriously affect the bonding effect.
•  Poor Weather Resistance: It is prone to failure in humid and high-temperature environments and is not suitable for outdoor or cold chain use.
Application Scenarios:
•  Paper box labels in indoor dry environments
•  Food packaging (must meet food-grade certification)
•  Short-term promotional labels, express delivery waybills, etc.

II. Hot Melt Adhesive

Advantages:
•  Strong Initial Adhesion: It sticks firmly upon application without the need to wait for curing.
•  Fast Bonding Speed: Suitable for high-speed automatic labeling machines, resulting in high production efficiency.
Disadvantages:
•  Not Resistant to High and Low Temperatures: It softens and flows at high temperatures, and its holding power significantly decreases at low temperatures (such as in winter).
•  Average Environmental Protection: Although most are non-toxic formulas, some contain trace amounts of VOCs, so caution is needed in sensitive industries.
Application Scenarios:
•  Logistics labels for quick labeling
•  Paper box and plastic bottle labels for storage at room temperature
•  Industrial scenarios with high requirements for immediate adhesion

III. Solvent-based Adhesive / Rubber-based Adhesive

Advantages:
•  Strong Initial and Final Adhesion: It has a strong bonding force and performs excellently on difficult-to-bond materials (such as PP, PE, metal, glass).
•  Repeelable: Some solvent-based adhesives have a “repeelable” characteristic, suitable for labels that need to be repositioned.
Disadvantages:
•  Poor Environmental Protection: It usually contains solvents, has a slight odor, and does not meet the standards for food contact materials.
•  Long-term Aging Risk: Some low-quality solvent-based adhesives may turn yellow and seep glue over time.
Application Scenarios:
•  Industrial equipment nameplates
•  Electronic product labels
•  Automotive parts identification

•  Outdoor temporary labels requiring strong adhesion

Purchasing Pitfall Guide: How to Quickly Identify Adhesive Types?

The simplest method is here—smell + touch + test:
Smell the Odor:
•  No smell or a slight paper smell → Most likely water-based adhesive
•  Rubber smell or slight solvent smell → Likely solvent-based adhesive
•  Wax-like smell when heated → Hot melt adhesive
Check the Adhesive Layer:
•  Transparent adhesive layer with a slightly moist feel → Water-based adhesive
•  Milky white adhesive layer with elasticity → Hot melt adhesive
•  Deep yellow or brownish-yellow adhesive layer that is sticky → Solvent-based adhesive
Conduct a Simple Test:
•  Stick it on a plastic surface with slight oil stains and see if it falls off after 24 hours.
•  If it falls off: It is likely water-based adhesive; if it remains firm: It is probably solvent-based or hot melt adhesive.