Wire For Fruit Bag

The diameter of sealing wire for fruit packaging bags typically ranges between 0.50mm and 0.70mm, a range proven optimal through practical application-sufficiently fine for quick manual or machine threading while delivering the necessary tensile strength. Our wire's tensile strength is strictly controlled within the 300-500 MPa range. For example, a 0.65mm diameter wire with 450 MPa strength can easily exceed 70 kilograms of single-wire breaking force. This means bags sealed with it can withstand vertical tensile forces far exceeding their full load weight, effectively preventing tear-outs during hoisting or stacking operations. More importantly, through specialized annealing processes, we ensure the wire maintains excellent elongation (typically ≥12%) and repeated bending performance alongside its high strength. This guarantees it won't break easily during multiple bending and winding operations on sealing machines, significantly reducing wire breakage and production line downtime.

Humidity in fruit storage and transportation environments is the greatest enemy of metal materials. We offer galvanized coatings ranging from 12g/m² to 40g/m² to meet varying levels of protection requirements:

• Economy Standard Grade (12-20g/m² galvanized coating): Suitable for dry, short-term indoor storage environments or inner packaging, effectively preventing slow oxidation during warehousing.
• General Enhanced Grade (20-30g/m²): The most common choice, meeting requirements for most cold chain transportation and short-term maritime shipping. Neutral salt spray tests per GB/T 10125 standard show that 25g/m² galvanized wire exhibits white rust after over 72 hours, providing reliable rust protection.
• High Protection Grade (30-40 g/m² zinc coating): Specifically designed for high-humidity environments (e.g., coastal export regions) or packaging scenarios involving potential contact with acidic juices (e.g., citrus, pineapple). The thicker zinc layer delivers extended sacrificial anode protection, ensuring rust-free performance throughout the packaging's entire lifecycle and preventing rust stains from contaminating fruit.

Physical Form Optimized for Efficient Production

We deliver finished products precisely wound onto plastic or steel spools, with standard coil weights of 7 kg and 14 kg. This design offers multiple advantages: the spools ensure smooth, tangle-free, knot-free wire unwinding at high speeds; predetermined coil weights facilitate material management and consumption tracking in workshops; and the compact spool format significantly saves storage and transportation space. Our wire features a smooth surface, uniform zinc coating, and low friction coefficient. It perfectly complements equipment ranging from semi-automatic foot-operated sealing machines to fully automated strapping lines, ensuring stable wire feeding and consistent sealing results.

Detailed Technical Specifications and Parameters Table

 

Professional Application Scenarios and Selection Guide

Sealing of Net/Woven Bags for Citrus and Hard Fruits like Apples

These fruits are heavy, requiring multiple layers of stacked packaging, thus demanding high seal strength. We recommend using steel wire with a diameter of 0.65-0.70mm, tensile strength exceeding 450MPa, and a zinc coating of no less than 25g/m². This ensures that a fully loaded 25kg fruit bag, stacked in multiple layers (typically 5-6 layers), will not deform or slip when the bottom bag opening is subjected to significant vertical pressure.
 

Tying breathable bags or freshness boxes for lightweight products like berries and leafy greens

This type of packaging prioritizes operational convenience and precision. Recommended wire specifications: diameter 0.50-0.55mm, tensile strength approximately 350MPa. Its slender gauge facilitates rapid knotting while providing sufficient packaging security. Exceptional flexibility prevents damage to delicate produce during binding.

Packaging for fruits and vegetables in export shipping containers

Shipping containers exhibit extremely humid conditions with widespread condensation. High-protection galvanized steel wire (30-40g/m²) must be selected to prevent seal failure or cargo contamination due to corrosion during voyages lasting several weeks. Experience from many international fresh produce exporters indicates that using high-zinc coating sealing wire can reduce packaging-related cargo damage rates by over 0.5% during long-distance sea transport.
 

Automated Packaging Lines

 

For high-speed sealing machines, wire diameter consistency, surface smoothness, and coil configuration are critical. Our "precision polished" grade products feature surface roughness Ra values below 0.8μm and are supplied in fixed-length coils with minimal or no welded joints. This ensures continuous machine operation for hours without downtime for wire changes or jam resolution, boosting production line efficiency by up to 15%.

Honor and qualification

 

 

Official certification, professional after sales service.

 

 

 

Why Choose Us?

 

Deep Manufacturing Expertise in Niche Markets

With over a decade specializing in producing specialty steel wires under 1.0mm in diameter, we possess profound understanding of the unique demands within the fruit packaging industry. We go beyond product sales, offering expert material recommendations and technical solutions tailored to your specific fruit varieties, bag materials, climate conditions, and equipment types.

Rigorous Data-Driven Process Quality Control

We adhere to the principle that "process determines quality." From chemical analysis of incoming wire rods to dimensional monitoring at every die during drawing, and real-time composition and temperature control of galvanizing baths, we maintain over 20 critical process control points. Each finished wire reel's performance is traceable to specific production batches and parameters, ensuring absolute consistency. We welcome customer-designated third-party agencies (e.g., SGS) to conduct pre-shipment sampling inspections.

Flexible responsiveness and rapid delivery capability

We maintain regular inventory of commonly used specifications (0.65mm/25g/m²) to handle urgent orders. Standard orders typically have a production cycle of 10-15 business days. Our packaging is robust and clearly labeled for long-distance international shipping, and we can provide complete export documentation per your requirements.

Committed to Reducing Your Total Cost of Ownership

We offer more than just wire pricing-we provide a solution designed to lower your overall operational expenses. By enhancing wire strength consistency and flexibility, we help minimize production line breakage waste and downtime. Through more precise coating protection, we help prevent cargo claims resulting from seal corrosion. In the long run, choosing us means greater packaging reliability and lower overall risk.