Four-Fold Bottom Seal Bag Machine | S/U-Type & Flat-Bottom

What are the advantages of Four-Fold Bottom Seal Bag Machine?

Heavy-Duty Industrial Application

The four-fold flat bottom structure provides excellent strength and load capacity, making the bags ideal for industrial and commercial waste handling rather than household use.

Optional S-Type Cutting Design

The S-type refers to a customized S-shaped cutting on the bag opening using a special die. This feature is optional and can be configured based on specific customer requirements.

Stable & Consistent Bottom Sealing

Equipped with a servo-driven folding and sealing system, the machine ensures uniform bottom width and strong sealing performance, suitable for large-sized garbage bags.

Material Compatibility for Garbage Bags

Designed for processing HDPE and LDPE materials, which are commonly used in garbage bag production for their durability and cost efficiency.

Series Model Overview

Automatic Four Fold Bag on Roll Making Machine (Sway Type) >>

This machine is mainly used for producing four fold bag on roll, four fold S-type bag on roll, film feeding mode adopts sway design, special for long length of the bag on roll, automatic rewinding, neat rewinding.

Technical data

Items	JDSL-1100
Max. Production Speed	140m/min
Bag Width Range	500-1000mm
Bag Length Range	500-3000mm
Film Thickness	0.01-0.05mm

Automatic Four Fold Bag-On-Roll Making Machine >>

This machine is specialized in producing rolling four fold flat bag, single line, roll change automatically, neat winding.

Technical data

Items	JDDF
Bag making thickness	0.006-0.025mm
Bag making methods	Rolling four fold flat bag
Temperature control zone	2 Zones

Automatic Four Fold Flat/S Bag on Roll Making Machine (Sway Type) >>

This machine is mainly used for producing U-type bag on roll ,S-type bag on roll,T-shirt bag on roll ,flat bag on roll,star seal flat bag on roll,automatic rewinding,neat rewinding.

Technical data

Items	JDDSZ-300×2
Max. Production Speed	U-type/S-type bag on roll: 60-190pcs/min×2 T-shirt bag on roll: 60-140pcs/min×2
Bag Width Range	80-180mm
Bag Length Range	500-1500mm

Options & Customization Section

Tear-Notch Option:Add easy-tear notches for consumer convenience, enhancing user experience.

S type/U-type cutting design:The S-type/U-type refers to a customized S-shaped/ U shaped cutting on the bag opening using a special die. This feature is optional and can be configured based on specific customer requirements.

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What's the difference between standard four-fold and S-type machines?

Standard four-fold produces traditional square-bottom bags with uniform folding. S-type (sway) creates more compact rolls through alternating fold patterns, reducing roll diameter by approximately 30% while maintaining bag quality.

Can I produce stand-up pouches for liquid products?

Yes, with proper material selection (laminated films with barrier properties) and our enhanced sealing options, our machines can produce leak-proof pouches suitable for liquid packaging. We recommend material testing before production.

What materials work best with four-fold bottom seal machines?

Laminated films, co-extruded films, metalized films, and high-barrier materials perform best. Standard monolayers like LDPE can be used but may have limited stand-up capability. We offer material testing services to optimize your results.

How long does it take to change bag sizes?

With our recipe storage system, size changes take approximately 5-10 minutes, including bottom width adjustment. Pre-programmed settings ensure repeatable accuracy.

Do you offer machines for pre-made stand-up pouch production?

Our machines produce roll-stock stand-up pouches, which are ideal for high-volume automated filling lines. For pre-made pouches, we recommend different equipment configurations—please consult our sales team for specific recommendations.

FAQs Related to Four-Fold Bottom Seal Bag Machine

Here you can find Q&A related to Four-Fold Bottom Seal Bag Machine—specifically regarding customization, service, and quality.

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From consultation to installation, and from training to after-sales service, we’re with you every step of the way.

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We can help :

24/7 Remote Technical Support

On-site Installation and Commissioning

OEM Spare Parts

Operator Training Program