Implementing impact absorption rates of 6%-80% through ulchin composite bubble film or bubble composite kraft paper (thickness ≥ 0.03mm), suitable forulchin electronic products, and fragile goods transportation protection13.ulchin Special interwoven glass fiber process (such as fiberglass reinforcement) foam paper can enhance punct resistance, preventing sharp objects from piercing the packaging312 Waterproof and moisture-proof, PE coating composite process (coating thickness ≥ 0.02mm enables the paper to have IPX4 grade waterproof performance, moisture permeability ≤ 5g/(m²·24h), suitable for high humidity environment61, ulchin aluminum foil composite structure (such as PET/AL/CPP) further blocks water vapor and oxygen.
Using biodegradable k paper base material (basis weight 70-150g), in compliance with environmental standard 28018, bubble composite kraft paper supports water- ink printing and color fastness of grade 4 or above610.
Second, mainstream composite process classification
Type Process Characteristics Applicable scenarios
Bubble composite kraft paper Bubble diameter 5-25mm optional, buffering capacity is positively correlated with thickness, and has transparent visibility (transmittance > 80 E-commerce express delivery, clothing handicraft packaging17
ulchin PE spray composite kraft paper Single side/double side spray covering polyethyl (PE), resistant to temperature -20℃~80℃, moisture-proof cost is 30% lower than aluminum foil composite 30%, daily product sealed packaging69
Aluminum foil composite kraft paper The best barrier (transparency < 0.5 cm³/(m²·24h, can ulchin vacuum packaging, suitable for high-demand scenarios such as medical devices410
Third, key indicators for purchasing
Base material basis weight matching
It is necessary to select kraft paper with surface smoothness ≥ 50s to avoid bleeding (suitable for LOGO, barcode)613.
Fourth, typical application scenarios
ulchin E-commerce logistics bubble composite kraft paper: Using yellow/ composite bubble bags (size 20×30cm to 40×50cm), the cost per piece is 0.5-1.2 y, reducing the transport damage rate by >40%17.
Precision instruments: Aluminum foil composite bag anti-static coating (surface resistance 0⁶-10⁹Ω), protecting sensitive components such as circuit boards49.
Outdoor gear packaging: PE spray kraft paper bag (IPX grade waterproof) with heat-sealed mouth design, suitable for camping gear, spare clothing storage10.
Note: The choice of composite process needs to match the sealing equipmentsuch as ulchin hot seal machine temperature suggestion 150-180℃); it is recommended to avoid direct sunlight storage for bubble film composite to prevent aging of the bubble layer.
