Views: 0 Author: Eva Publish Time: 2025-04-08 Origin: GUANGDONG YINGHUI NEW MATERIAL TECHNOLOGY CO., LTD.
Temperature and humidity are critical factors. In cold chains at -20°C or in high-heat conditions of 60°C, labels can fail. A food company experienced a 30% increase in complaints due to labels detaching from frozen products. In cold environments, it is advisable to use cold-resistant adhesive (≥90% viscosity at -50°C) with a polyethylene (PE) surface. In high-heat situations, opt for silicone-based adhesive (≥200°C resistance) with polyimide film, as verified by the ASTM D3330 test.
Proper label-substrate matching is essential. A cosmetics brand incurred a loss of over 500,000 yuan when paper labels on glass bottles detached due to low surface energy. For polyethylene (PE) and polypropylene (PP) plastics, utilize a rubber-based adhesive with matte silver PET that has a peel force of at least 3.5 N per 25 mm. For curved metal cans, opt for flexible PVC combined with a high-tack acrylic adhesive that offers more than 150% elongation. On rough wood surfaces, employ a reinforced cloth substrate with a long-lasting hot-melt adhesive that provides over 72 hours of adhesion.
Adhesives with a shelf life of 12 to 24 months can pose risks when they expire. The initial tack may decrease by over 50%, and residual glue can develop, as experienced by a logistics firm. To mitigate this risk, implement a batch system that prioritizes the use of near-expiry stock. Store adhesives at a temperature of 15 to 25°C and a relative humidity of 40 to 60%. To ensure effectiveness, test the adhesive by applying it to stainless steel and checking for curls after 24 hours.
Wrong ink and material combinations can lead to significant issues. A retailer experienced a 20% spike in returns due to barcodes printed on synthetic paper with water-based ink being unreadable. First, identify the printing method used (UV, thermal, or laser). Next, match the materials appropriately: coated paper is suitable for water- or solvent-based inks, while PET film requires pre-coating. Additionally, ensure that barcodes comply with Class A standards (ANSI X3.182) and conduct post-print vibration tests to verify their readability.
Dirty substrates can reduce label adhesion by 70% (ISO 29862). The labeling process involves selecting the appropriate cleaner (isopropyl for non-polar surfaces, acetone for polar surfaces), performing a one-way wipe with a lint-free cloth, checking surface energy (≥36 mN/m using a dyne pen), applying a pressure of 0.3 to 0.5 MPa, rolling bubbles at a 45° angle, and allowing the labels to cure for 24 hours before shipping.
