Reliable Raincoat Manufacturing Process – Inside Powinsun Factory
At Powinsun, our raincoat manufacturing process follows strict standardized procedures.
As an experienced OEM/ODM rainwear manufacturer since 2015, we understand that for overseas wholesalers and brand buyers, “quality consistency” and “delivery reliability” matter far more than low price alone.
Today, we open a window into our production and quality control process, so you can see exactly how a “Powinsun-made” raincoat is born – from raw materials to finished goods ready for shipping.
Step1. Raw Material Selection – Certified Materials Only
The first step of our raincoat manufacturing process is raw material selection. Our warehouse maintains stock of multiple fabrics including EVA, PVC, and PU-coated polyester.
All incoming materials must pass three inspections:
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Tensile strength tests – to ensure the fabric does not tear easily under stress
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Environmental compliance checks – meeting REACH standards for safe export to Europe and North America
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Thickness uniformity inspections – to avoid weak spots that could leak
We never use recycled or substandard additives. This commitment to quality materials directly extends the lifespan of every raincoat we produce.
Step2. Precision Cutting & Heat-Sealed Seam Sealing
We use fully automatic multi-layer cutting machines from a trusted brand. This equipment ensures:
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Precise edge control with minimal size tolerance (within 2mm)
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Reduced material waste – which helps us offer competitive pricing
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Consistent cutting across large batch orders
At the critical sewing stage, all seams undergo heat-sealing tape lamination.
Our technicians operate industrial-grade hot air seam sealing machines. Each needle hole and fabric joint is covered with high-adhesion waterproof tape.
This is the core guarantee of true “100% waterproof” performance – and it is also the step where low-cost manufacturers often cut corners. We do not.
Step3. Rigorous Finished Product QC (Quality Control)
Before leaving the factory, each batch of raincoats must pass three mandatory tests:
1. Water Spray Test
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What We Simulate: Moderate to heavy rain with continuous spraying for 12 minutes
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Passing Standard: No water penetration through any seam or zipper
2. Tensile & Tear Resistance Test
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What We Check: High-stress areas like cuffs, hoods, and shoulder seams
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Passing Standard: No tearing or seam separation under specified pressure
3. Appearance & Function Check
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What We Check: Zipper smoothness, reflective tape placement, Velcro adhesion, stitching quality
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Passing Standard: All functions operate correctly; no visual defects
Only batches that pass all three tests are approved for packaging. Our QC team documents each test result for traceability.
Step4. Stable Production Capacity & On-Time Delivery
The final stage of our raincoat manufacturing process focuses on stable production and reliable delivery. Our standardized workshop achieves a daily output of 1,000 units.
Typical lead times for bulk orders:
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Regular orders (no customization): 7–10 days
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Custom OEM/ODM orders (including sample approval): 15–25 days
We use an ERP system to manage orders, materials, and production scheduling. This system alerts our team to any potential delays before they happen. As a result, over 98% of our orders are loaded and shipped on schedule – a track record we are proud to share with our clients.
Choosing Powinsun means more than just receiving a raincoat. You gain a reliable, traceable supply chain partner that communicates clearly and delivers as promised.
We welcome you to witness our raincoat manufacturing process in person.
Contact our sales team to request free samples or a bulk quotation today.
