Products Descriptions
Tired of weak bag seals that cause material leakage, costly waste, or delayed shipments? GK20-8W/8LW double needle woven sack stitching machine-upgraded from the trusted single-needle GK20-8-are built to solve your packaging pain points with reinforced stitching and industrial-grade reliability, tailored specifically for your production workflow.
As a bag manufacturer or packaging manager, you need equipment that keeps up with your deadlines while delivering consistent quality. These PP PE paper bag double needle sewing machines feature a chain stitch design and upper/lower feeding structure-so you'll never deal with material slippage again, even when sewing thick woven sacks, slippery PP/PE bags, or heavy-duty cement bags.
Choose from four models to perfectly match your setup:
- GK20-8W: Right-hand double-needle head (ideal for your standard production lines, no setup adjustments needed)
- GK20-8LW: Left-hand double-needle head (perfect for your custom or symmetric sewing stations, optimizing your factory layout)
- GK20-8WA: Right-hand double-needle head + built-in cutter (saves your team 10-15 seconds per bag on manual trimming
- GK20-8LWA: Left-hand double-needle head + built-in cutter
We know maintenance downtime kills your productivity-so these machines come with optional small or large oil tanks for automatic lubrication. You can choose the tank size that fits your production volume: the large tank means fewer refills during long shifts, while the small tank saves space in compact work areas.
The dual parallel stitches create ultra-strong seals that prevent leakage, even for heavy or fine-grain materials like cement, fertilizer, or seeds. These upper and lower feed woven sack sewing machines work seamlessly with your existing materials: paper bags, woven sacks, PP bags, PE bags, and cement bags-no need to switch suppliers or adjust your production process. Whether you run a small paper bag factory, a large PP bag manufacturing plant, or a high-volume cement bag production line, these machines adapt to your needs.
Flexibility is key for your growing business: Use them on a table for manual small-bag sewing (great for short runs or custom orders) or seamlessly integrate them into your automatic bag making system (perfect for mass production).
Cor Benefits for Your Business:
- Double-needle, four-thread design
- Upper/lower feeding
- Right/left-hand + cutter/non-cutter option
- Optional oil tank sizes: Choose what works for your production volume, reducing maintenance downtime
- Dual-use design: Fits manual or automatic setups, adapting to your order volume (short runs or mass production)
- High-speed industrial performance: Reliable for long shifts, helping you meet tight deadlines
Ready to upgrade your bag stitching line and solve your packaging headaches for good? Contact us for a free custom quote tailored to your production needs, or request a detailed product spec sheet. We ship globally with fast lead times (7-15 business days) and 24/7 after-sales support.
Applications

Plastitc Bag

Nets Bag

PE Bag
Products Specifications
|
Model |
GK20-8W |
GK20-8LW |
|
|
Number Of Needle |
Double needle |
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|
Feeding System |
Top and bottom feed |
||
|
Max. Sewing Speed |
2200SPM |
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|
Max. Stitch Length |
8-15mm |
||
|
Max. Sewing Thickness |
8mm |
||
|
Needle |
27x300 |
||
|
Stitch Type |
401 |
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| Needle Gauge |
6mm |
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|
Feature |
Right sewing head |
Left sewing head |
|
|
Lubrication |
Automatic |
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Products FAQ
1. What kinds of bags can your bag sewing machines stitch?
A: Our bag sewing machines perfectly fit PP woven bags, PE bags, jute bags, non-woven bags, fertilizer bags, feed bags and industrial packaging bags. It covers daily packaging and industrial heavy-duty sewing needs.
2. How durable are your industrial bag sewing machines?
A: Our machines adopt heavy-duty cast iron body and high-quality core parts. With regular maintenance, they can run stably for many years with low failure rate.
3. How about the packaging and transportation of that machine?
A: All the machines are packed in standard export cartons or wooden packaging boxes to prevent damage during transportation.
4. What payment terms do you accept?
A: We accept T/T,Paypal,Western union ect.
why choose us

our Company
PACKSTAR is a leading professional manufacturer of bag sewing machines, bag closing machines and supporting packaging equipment. Our products are trusted by clients in over 30 countries, serving food, chemical, feed, grain, fertilizer and packaging industries.
Meanwhile, we offer one-stop services including pre-sales technical consultation, free solution design, on-site installation guidance, long-term after-sales maintenance & spare parts supply.
Welcome to email or call us get the professional sewing solution and quotation.
Our address
No.25,Hi-Tech Zone,Xi'an,710065,China
Phone Number
86-29-81870126,81870128
dekoco@vip.163.com,sales@chinapackstar.com

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