The packaging bags for domestic napkins are typically made of low-density polyethylene (LDPE) or copolymer polypropylene (CPP), giving them a soft, matte texture with moisture resistance and tear resistance to protect the napkins from humidity.

UV laser color-change marking is used on the outer layer, altering the molecular structure of the coating to create clear production date markings. This consumable-free method ensures wear-resistant, fade-proof markings that remain legible over time.

UV laser marking on the outer PET coating of PET/AL/PE composite packaging bags utilizes high-energy laser beams to trigger photochemical reactions and slight thermal effects. When applied to the white coating, the laser alters the molecular structure, turning the surface gray instead of simply ablating the layer.

This color-change principle ensures clear, durable markings, commonly used for printing production dates and batch numbers. The markings remain wear-resistant and fade-proof, staying legible even under prolonged use or harsh environmental conditions.

Sanitary pad packaging is typically made of polyethylene (PE)/polypropylene (PP) composite film, offering excellent flexibility for stretching and sealing. With a matte texture and comfortable feel, it provides superior moisture and dust resistance, effectively protecting the product while maintaining packaging strength.

This composite film supports UV laser marking, where the laser induces a photochemical reaction in the coating, changing its color to create gray markings on the white surface for production dates and batch numbers. This method ensures clear, durable markings that remain fade-resistant even during long-term storage and transport.

Food packaging bags with a smooth silver-white surface, made of aluminum foil (AL) and PET composite, are commonly used for high-barrier food packaging. These bags have a metallic sheen with a matte texture, offering excellent moisture, oxidation, and light resistance, ensuring food remains fresh and crisp during transport and storage.

Typically used for coffee beans, tea, nuts, spices, and ready-to-eat snacks, these bags maintain food freshness and aroma. Fiber laser marking removes the surface coating, revealing a deeper underlying color to create clear, durable production date and batch number markings that resist wear and fading.

Noodle packaging bags are typically made of BOPP/PE (biaxially oriented polypropylene/polyethylene) composite material. The BOPP outer layer offers high transparency and excellent printability, allowing visibility of the noodles while providing moisture resistance for freshness. The PE inner layer is soft, non-toxic, and food-safe, with strong heat-sealing properties to ensure a secure, moisture-proof seal.

A white-coated area on the BOPP surface is designated for UV laser marking. Using the laser color change principle, the coating’s color is altered to print clear production dates and batch numbers without piercing the packaging. The durable, wear-resistant markings ensure product safety during transport and storage.

UV laser marking technology is used on the PET wrap-around label of cylindrical facial cleanser bottles, ensuring clear production date markings on curved surfaces. The laser operates through a color change mechanism, where high-energy beams trigger a photochemical reaction, altering the molecular structure of the PET surface to create gray-white or dark markings without material removal.

This method is ideal for curved surfaces, featuring low heat impact to prevent surface damage or deformation.

Small sachets for concentrated juice are typically made of PET/AL/PE composite material. The outer PET layer is durable and wear-resistant, the aluminum foil (AL) layer blocks light, oxygen, and moisture, while the inner PE layer ensures food safety and sealing.

To mark production dates and batch numbers, UV laser marking is applied to the PET outer layer. The laser induces a photochemical reaction that alters the PET surface’s molecular structure, creating gray or dark markings without piercing the packaging. This method ensures clear, wear-resistant markings while preserving the integrity of the aluminum foil and PE layers, preventing juice leakage.