Boxed food vest bag Fruit and Vegetable Bags Custom Packaging Plastic Bags

Premium Materials & Safety Standards： Our food-grade boxed t-shirt bags are manufactured using high-density polyethylene (HDPE), a polymer renowned for its outstanding mechanical properties and chemical stability. Unlike conventional plastic bags, we exclusively use FDA 21 CFR 177.1520-compliant food-safe resins to guarantee absolute safety for direct food contact. The raw materials contain no recycled content or plasticizers, with heavy metal content strictly controlled below 0.1 ppm. To meet diverse usage scenarios, we offer three product series: standard (transparent), reinforced (UV-resistant additive), and low-temperature (withstands -30°C). Each formulation maintains precise melt flow rate (MFR) control within the ideal range of 0.8-1.2 g/10min.

Precision Manufacturing Process: Our production line utilizes German-made blown film equipment, achieving accurate thickness control (0.03-0.05mm) through multi-layer co-extrusion technology. The process involves six critical stages: raw material pre-treatment (4-hour drying at 80°C) → melt extrusion (210-230°C) → bubble forming (0.8 MPa compressed air) → cooling and shaping (dual-sided water cooling) → printing (8-color gravure press) → cutting and bag-making (±0.3mm dimensional tolerance). Notably, the bag bottom features a unique "I-beam" heat-sealing technique that increases load capacity by 40% compared to standard t-shirt bags. Each batch undergoes random sampling tests, including seal strength (≥3.5N/15mm), dart impact (≥400g), and static friction coefficient (0.2-0.4).

Functional Design Innovations: Based on extensive market research, we have implemented multiple ergonomic improvements. The bag opening adopts a curved cutout design that maintains handle strength while preventing hand strain. Side micro-embossing enhances anti-slip performance during stacking. We offer three standard sizes: small (25×40cm, 5kg capacity) for convenience stores, medium (30×45cm, 8kg capacity) for supermarket fresh produce sections, and large (35×50cm, 10kg capacity) for wholesale markets. All products support customized printing with eco-friendly water-based inks, capable of reproducing 0.5mm fine graphics with professional-grade color accuracy.

These t-shirt bags play an indispensable role in food distribution. Chain supermarkets use them for packing produce and frozen goods, bakeries prefer branded versions for bread and pastries, and food delivery platforms value their heat resistance for hot meals. Non-food applications include pharmaceutical packaging and stationery organization. The low-temperature variant performs exceptionally well in cold chain logistics, remaining flexible even during prolonged freezing.