Color-printed paper-plastic composite seed woven packaging bag

Applicable materials:
Corn seeds, wheat seeds, rice seeds, soybean seeds, peanut seeds, sorghum seeds, rapeseed seeds, cotton seeds, vegetable seeds (including tomato, cucumber, pepper, Chinese cabbage, etc.), melon seeds, flower seeds, turfgrass seeds, forage grass seeds, green manure seeds, and other agricultural and horticultural seeds.

Key features:
The bag opening is smooth and easy to open and fill, making it compatible with seed-specific metering and filling equipment as well as manual filling lines. The sealing method is flexible, allowing customers to choose seam sealing, heat sealing, or ultrasonic sealing; ultrasonic sealing leaves no pinholes, providing excellent leak-proof performance. A multi-layer structure featuring a laminated outer film and an inner bag ensures superior leak resistance and moisture protection, effectively preserving seed viability. Optional laser micro-perforation can be added to meet the seeds’ respiration needs. The bag body is flat and stable for stacking, with excellent durability for long-distance transportation and warehouse storage. Antioxidant and UV-resistant additives (optional) are available to prevent embrittlement and color fading when stored outdoors or in warehouses. The printing is high-quality and clear, with variety information prominently displayed. Overall, the cost is moderate, making it ideal for bulk procurement and export orders.

Core Advantages:
Moisture- and mold-resistant, tensile-strength and puncture-resistant, with a high-strength multilayer composite structure, controllable breathability (with optional micropores), compatible with high-speed filling lines, leak-proof, and compliant with seed packaging regulations.

Material and Craftsmanship:
The base material consists of a woven fabric made from PP (polypropylene) or HDPE (high-density polyethylene), laminated on the inner side with a PE barrier film (either coated or co-extruded as an inner liner), forming a double- or multi-layer composite structure of “woven fabric + PE film.” An aluminum foil barrier layer or a kraft paper outer layer can be optionally added to meet varying moisture-barrier requirements and aesthetic preferences. The bag style is a flat pouch, with bottom options including sewn-in bottoms (requiring sealing strips or liner paper), heat-sealed bottoms, or ultrasonically sealed bottoms. Printing is carried out using 2- to 7-color gravure color printing with lamination, producing exquisite patterns and vibrant colors; the laminated layer offers water resistance and abrasion resistance, making it ideal for showcasing seed brand identity and variety information.

Sealing method:
After filling, sealing can be performed according to customer requirements using one of the following methods: stitch-sealing with a bag-sewing machine (requiring sealing strips or liner paper), heat-sealing (requiring an inner bag), ultrasonic sealing (no needle holes, excellent leak-proof performance), or tie-sealing (suitable for small-packaged seeds).

Applicable filling method:
Compatible with screw fillers, impeller fillers, pneumatic fillers, gravity fillers, trough-belt fillers, seed-specific metering fillers, and manual filling (for semi-automatic or small-batch production lines).

Tensile strength:
Testing has confirmed that the tensile strength reaches ≥700 N/50 mm, fully meeting the requirements for stacking loads of 1 to 25 kg and for long-distance transportation.

Moisture resistance:
The water vapor transmission rate is reduced by more than 90% (in a laminated structure with an inner bag), effectively preventing seed moisture absorption and mold growth, reducing the germination rate, and extending the shelf life to over 12 months. An optional aluminum foil layer can further reduce the water vapor transmission rate by more than 98%, making it suitable for seeds with extremely high moisture-barrier requirements or for export-grade seeds.

Breathability (optional):
To meet the respiratory needs of seeds, laser micro-perforation can be employed, with pore diameter and density customizable to strike an optimal balance between moisture resistance and gas permeability. This ensures that seeds remain viable during storage and prevents declines in germination rates caused by oxygen deficiency or carbon dioxide buildup.

Corrosion resistance grade:
Meets four-star standards and exhibits excellent tolerance to oils and moisture in the seed as well as to the chemical components in the coating agent, such as fungicides, insecticides, and dyes.

Packaging drop test:
Under a 25 kg load condition, following a 1.2-meter free-fall test, the package remained intact and showed no leakage on all six drop faces.

Printing standards:
Utilizing solvent-resistant inks, the system achieves a 100% scan-and-recognize rate for barcodes and QR codes, supporting product traceability, variety information retrieval, cultivation guidance, and anti-counterfeiting verification.

Customization Scope:
Supports multi-color overprinting, enabling the printing of brand logos, variety names, net content, four key quality indicators—purity, fineness, germination rate, and moisture content—along with the applicable standard number, seed production and business license number, variety approval number, testing date, shelf life, place of origin, manufacturer’s name and address, planting instructions, and other relevant information. Additional features include the incorporation of warning labels such as “Moisture-Proof,” “Sunlight-Resistant,” “Do Not Store with Pesticides,” and “Coated Seeds Are Not for Consumption,” as well as barcode and QR code areas, designated spaces for anti-counterfeiting labels, metrological markings (e.g., 1 kg, 2.5 kg, 5 kg, 10 kg, and 25 kg scale lines), environmental recycling symbols, and special warning labels for coated seeds (such as skull symbols or red warning stripes).

Environmental Compliance:
The product is manufactured using virgin materials, is odorless and dust-free, and is recyclable. We can provide hazardous-packaging export certification (for coated seeds or where required by the destination port), ensuring compliance with relevant export packaging regulations.

Packaging specifications:
All specifications can be customized to meet customer requirements, including fill weight (common range: 0.5 kg to 25 kg; typical sizes include 0.5 kg, 1 kg, 2.5 kg, 5 kg, 10 kg, 15 kg, 20 kg, and 25 kg), bag dimensions (length × width), sealing method (sewn bottom/heat-sealed bottom/ultrasonic sealing), inner-bag material (PE barrier film or aluminum foil), number of inner-bag layers (single-layer or double-layer), whether the bag is perforated for breathability (perforation diameter and quantity customizable), and printing area (single-sided, double-sided, or full-color), among others.

Applicable to:
This product is suitable for field seed-processing enterprises specializing in corn, wheat, rice, and other major crops; vegetable seed producers; flower seed propagation bases; forage seed suppliers; seed import–export traders; seed companies; agricultural research institutions; and seed distributors and wholesalers.

Price and Minimum Order Quantity:
Specific pricing and minimum order quantities are negotiable. Please feel free to call or write for a quotation.