Guide to Buy Packaging Material in Haimu

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When using pressure-sensitive adhesive (PSA) materials in labels, various issues may arise during printing, application, and storage. Below are the most common problems and their corresponding solutions.


1. Printing Issues
Problems:
● Ink adhesion issues: The ink may not adhere well to the surface of the label, leading to smudging or fading.
● Slow drying time: Certain PSA materials, especially those with glossy or coated surfaces, may slow down ink drying.
● Color shift or inconsistency: Different surface coatings and ink absorption rates can lead to color variations.
Solutions:
✅ Use UV or solvent-based inks designed for PSA materials to improve adhesion and drying speed.
✅ Conduct surface treatment (e.g., corona treatment or primer coating) to enhance ink adhesion.
✅ Use color calibration techniques to maintain color consistency.


2. Adhesion and Bonding Issues
Problems:
● Poor initial tack: The label does not adhere well immediately after application.
● Label lifting or peeling: The edges of the label may lift, especially on curved surfaces or rough materials.
● Incompatibility with certain surfaces: PSA labels may not stick well to low-energy surfaces like plastic, powder-coated metals, or silicone-treated surfaces.
Solutions:
✅ Choose the correct adhesive type (e.g., permanent, removable, high-tack) based on the application surface.
✅ Increase pressure during application to improve bonding strength.
✅ Use adhesion promoters or primers for challenging surfaces.


3. Label Curling and Warping
Problems:
● Curling during application: The edges or corners of the label lift before or after application.
● Warping over time: The label may deform due to temperature or humidity changes.
Solutions:
✅ Use dimensional-stable materials that resist temperature and humidity fluctuations.
✅ Store PSA labels in a temperature-controlled and humidity-controlled environment.
✅ Ensure proper release liner tension during label dispensing to avoid excessive curling.



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4. Die-Cutting and Processing Issues
Problems:
● Labels tearing or not cutting cleanly: The adhesive may ooze out, affecting the die-cutting process.
● Release liner breakage: Thin or weak liners may break during high-speed dispensing.
● Difficulty in label dispensing: Labels may not release smoothly from the liner.
Solutions:
✅ Use die-cutting blades designed for PSA materials to ensure clean cuts.
✅ Select a proper liner material that is compatible with the label dispensing process.
✅ Store labels in a dry environment to prevent adhesive migration and liner issues.


5. Temperature and Environmental Issues
Problems:
● Label falls off in extreme temperatures: Some adhesives lose their bonding strength in hot or cold conditions.
● Adhesive failure in humid conditions: Moisture can reduce adhesion, leading to peeling or bubbling.
Solutions:
✅ Select temperature-resistant adhesives for extreme conditions (e.g., freezer-grade adhesives for cold environments).
✅ Choose moisture-resistant adhesives for humid conditions.
✅ Store labels in controlled environments before application to ensure optimal performance.


6. Surface Contamination and Compatibility Issues
Problems:
● Oil, dust, or moisture on the surface reduces adhesion.
● Adhesive reacts with certain surfaces, leading to label discoloration or residue.
Solutions:
✅ Clean the surface with alcohol or a suitable solvent before applying the label.
✅ Use low-residue adhesives if the label needs to be removed cleanly.
✅ Test the adhesive on the surface before large-scale production to ensure compatibility.


7. Regulatory and Compliance Issues
Problems:
● Food safety concerns: Labels used on food packaging must meet regulatory standards.
● Recycling and sustainability issues: Some adhesives may hinder the recyclability of packaging materials.
Solutions:
✅ Use FDA- or EU-compliant adhesives for food packaging applications.
✅ Choose eco-friendly, recyclable, or biodegradable PSA materials to meet sustainability goals.



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Summary Table

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Issue Category



Specific Problems



Solutions





Printing Issues



Ink adhesion, slow drying, color shift



Use proper inks, surface treatment, and color calibration





Adhesion Issues



Poor initial tack, peeling, surface incompatibility



Select suitable adhesives, apply more pressure, use adhesion promoters





Curling Issues



Labels curling or warping



Use stable materials, control storage conditions, adjust release liner tension





Die-Cutting Issues



Labels tearing, liner breakage, dispensing issues



Use proper die-cutting blades, select appropriate liner materials





Environmental Issues



Adhesive failure in extreme temperatures or humidity



Use temperature- and moisture-resistant adhesives





Surface Issues



Contaminants affecting adhesion, residue problems



Clean surfaces before application, test adhesive compatibility





Regulatory Issues



Food safety concerns, recycling issues



Use compliant adhesives, opt for eco-friendly materials






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Offering a variety of specialized PSA materials—such as high-tack adhesives for rough surfaces, removable adhesives for temporary applications, and freezer-grade adhesives—can help increase product competitiveness and meet specific market demands.