Custom Side Gusset Bags | Premium Barrier Packaging for Wholesale
We build side gusset bags that do more than hold your product. We select barrier films for your shelf-life goals, print your brand without interruption, and engineer the gusset to maximize filling capacity. No compromises. Just packaging built around you.
Choose the Side Gusset Bag That Fits Your Product
Center seal, corner seal, or quad seal. Each with a different balance of cost, print space, and shelf presence. Which one fits your product best?
Center Seal – The Cost-Efficient Foundation
One piece of material, one seal, one straightforward production run. The seal sits at the back—out of the way, leaving the front panel clean for your branding. If your priority is controlling per-unit cost without sacrificing bag functionality, this is where you start.
Corner Seal – Design Room Without the Price Jump
Move the seal from the center to one corner, and the entire back panel opens up for graphics. No seam to design around. No premium price tag to pay. You get more creative freedom while staying in the same cost neighborhood as center seal.
Quad Seal – Built for Brands That Want to Stand Out
Four corner seals lock the bag into a rigid, box-like shape with superior shelf stability. Front and back panels stay completely seal-free. More material, more structure, more presence.
Why Work with Wanhao Package?
Own Factory – Your Quality Is in Our Hands
No middlemen. No third-party subcontracting. We control every step—from material inspection to finished bag packing—under one roof.
BRC & ISO 9001 Certified – Pass Your Supplier Audits with Confidence
BRC Global Standard for food safety packaging, backed by ISO 9001 quality management. The certifications your compliance team expects—already in place.
15+ Years in the Industry – We've Seen It All
We've been making flexible packaging since 2010. That's 15+ years of troubleshooting, optimizing, and refining—so you don't have to learn the hard way.
On-Time Delivery & Customer-First Service
Your order is tracked from production to arrival. We handle shipping documentation, customs clearance, and logistics coordination—so you don't have to. One dedicated contact, from quote to delivery.
Frequently Asked Questions
Center seal uses one piece of material with a single seal down the back—cost-efficient and production-friendly. Corner seal moves that seal to one side, freeing up the entire back panel for full-width printing. Quad seal uses four corner seals to create a rigid, box-like structure with maximum shelf stability. Which one fits your product depends on your balance of budget, branding, and bag stiffness.
MOQ varies by bag style, size, and material. Our typical MOQ is 30,000pcs. We offer low MOQs for sampling and scale up to full production runs as your order volume grows. Tell us your target quantity and we'll quote accordingly.
Yes. We offer gravure printing with up to 10 colors. Send us your artwork files (AI, PDF, or CDR format), and we will prepare a print proof for your approval before production.
Yes. If requested, we offer pre-production samples so you can check material quality, print accuracy, and bag structure before we run the full order. Sample lead time is typically 7–10 business days.
Production lead time is typically 10–15 working days for standard orders after sample approval. Shipping time depends on your destination—air freight takes 3–5 days, sea freight takes 15–30 days. We handle the logistics coordination on your behalf.
Yes. Our materials and production lines comply with BRC Global Standard for food packaging and ISO 9001 quality management. We can also provide FDA compliance documentation upon request for shipments to the US market.
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*(For urgent inquiries, call us directly at +86 13802378005)*
