Flat Bottom Pouch Packing Machines

All three are the same physical bag. Flat-bottom describes the rectangular flat base; K-seal describes the K-shaped welded seam pattern at the bottom corners that creates the rigid base; block-bottom describes the box-like shape when filled. ShengWei machines fill any premade flat-bottom bag from your converter regardless of which term your packaging team uses — bag converters typically use "K-seal" in technical specs while marketing uses "block-bottom" or "flat-bottom" on the bag itself.

Yes. Degassing valves are pre-applied to the bag by your bag converter (not by the filling machine) before bags are loaded. The SW-D series rotary fillers accept any flat-bottom pouch with or without valve — no machine modification needed. Specify "valve-ready bag" with your converter and ship samples to us for sealing test before commitment.

The K-seal welded base requires more film material and more bag-converter steps than a stand-up pouch’s simple folded gusset or a side-gusset’s side panels. Per-bag film cost runs roughly 20–35% higher than equivalent stand-up pouch at the same fill weight. For trial sizes and single-serve sachets, 3-side seal is the cheapest format. The flat-bottom premium is justified for high-shelf-presence SKUs (specialty coffee, premium tea, infant formula) where the rigid-box appearance commands a higher retail price.

Yes — resealable zippers are common on premium loose-leaf tea, sport-nutrition powder, and infant-formula flat-bottom pouches. The zipper is added by your bag converter; SW-D / SW-L machines include a zipper-opening station as a standard module that detects, opens, fills below, and reseals the top. See the zipper pouch packing machine page for module configuration details.

Kraft / PE laminate for premium specialty coffee & tea (kraft signals natural / specialty positioning), PET/AL/PE foil laminate for high-barrier baby formula and protein powder, metallized PET for lower-cost premium tea, and recyclable mono-PE for sustainable retail SKUs. Sealing parameters adjustable per film type via HMI. Ship sample bags to our Guangdong factory for a sealing test before commitment.

Yes — this is one of the fastest-growing flat-bottom applications. New-generation infant-formula brands ship in flat-bottom foil-laminate pouches at 400 g to 1.2 kg, replacing tin cans for: 60–70% lower transport weight, lower CO2 footprint, recyclable mono-material option emerging. Filling requires SW-L series auger with food-grade contact parts and dust extraction (powder safety). For high-volume single-serve baby food sachets, see back-seal pillow pouch or vertical packing machine options. Consult our engineering team for the formula-grade configuration.

Standard lead time 25–35 working days from deposit confirmation to FOB Shantou for any of the 3 SW-D / SW-L / SW-Y machines — the same window ShengWei has held since 2003. Payment: 30% deposit, 70% before shipment by T/T. Custom configurations (food-grade contact parts, multi-language HMI, zipper or valve modules) may add 5–10 days. Sea freight transit: SE Asia 7–14 days, Middle East 18–25 days, Europe 30–40 days.

Yes. Ship 2–5 kg of your product (whole-bean coffee, loose-leaf tea, protein powder, infant formula, etc.) plus 50 sample flat-bottom bags to our Shantou factory. ShengWei runs a packing test on the actual SW-D / SW-L / SW-Y machine matching your spec, records video of the fill cycle, and shares results with recommended speed and accuracy settings. Reach our sales team via the contact page for the shipping address.