Back Seal Packaging Machine Manufacturer | High-Speed Packing
Empower your industrial packaging lines with Ludyway’s next-generation back seal packaging machinery . Engineered with precision servo motion, intelligent PLC integration, and airtight fin/lap sealing technology for powders, granules, liquids, and solid single-serve items.
State-of-the-Art Back Seal Packaging Machinery
Delivering unmatched volumetric accuracy, continuous high-speed formation, and flawless seam aesthetics for modern B2B industrial packaging lines worldwide.
The back seal packaging machine, universally recognized in industrial automation as a pillow-pack or central vertical seal system , stands as the industry gold standard for cost-efficient, high-volume flexible packaging. By feeding continuous roll film across a specialized forming shoulder, the machine creates a seamless cylindrical tube joined by a central longitudinal fin or lap seal along the package spine, followed by top and bottom transverse hermetic cuts.
At Ludyway Machinery, our back seal packaging systems integrate multi-axis servo driving technology, high-response PID temperature control modules, and AI-assisted photocell mark tracking. Whether handling ultra-fine micro powders, hygroscopic food granules, high-viscosity pastes, or pharmaceutical formulations, Ludyway delivers uninterrupted round-the-clock packaging velocity with pinpoint weight repeatability.
- Continuous & Intermittent Formats: Configurable for multi-lane stick packaging or heavy-duty single-lane vertical bag filling.
- Hermetic Longitudinal Sealing: Ultrasonic or constant-heat rotary heating bars ensuring zero micro-leakage.
- Intelligent Material Synchrony: Direct integration with auger fillers, multi-head weighers, piston dosing, and volumetric cups.
High-Efficiency Back Seal Machine Series
Explore our flagship vertical back seal packing systems designed for food, pharmaceutical, nutraceutical, and specialty chemical applications.
Multi-Lane Stick Pack & Sachet Packaging Machine
View Specifications
Multi-Lane Coffee Bean & Powder Back Seal Line
View Specifications
High-Speed Multi-Lane Pharma Powder Back Sealer
View Specifications
High-Speed Stick Pack Granule Packaging Line
View Specifications
Multi-Lane Granule & Powder Packaging System
View Specifications
Universal Multi-Format Sachet Filling Machine
View Specifications
High-Speed Sugar Stick Back Seal Machine
View Specifications
Complete Turnkey Back Seal Production Line
View SpecificationsBack Seal Mechanical Workflow & Technical Specifications
Understand how synchronized servo motion drives continuous vertical forming, volumetric micro-dosing, and airtight hermetic sealing.
Precision Film Feeding
Roll film unwinds with continuous magnetic powder brake tensioning and optical photo-sensor registration for exact artwork alignment.
Shoulder Forming Tube
High-precision stainless forming collar guides the flat film web into an overlapped or fin cylindrical column without friction damage.
Longitudinal Sealing & Dosing
Continuous rotary or intermittent vertical heating bars bond the back seam while auger or piston pumps deposit measured products.
Transverse Cut & Discharge
Servo-actuated horizontal jaws execute the top seal, bottom seal, and precision serrated knife cut with optional easy-tear notches.
Standard Engineering Specifications by Series
| Machine Model Series | Film Width Range | Packing Speed | Dosing Accuracy | Sealing Style | Control Architecture |
|---|---|---|---|---|---|
| LW-BS200 Multi-Lane Stick | 40 mm – 200 mm | 120 – 480 bags/min | ± 0.5% – 1.0% | Central Back Fin Seal | Siemens / Omron PLC + Touch HMI |
| LW-BS320 Single-Lane VFFS | 80 mm – 320 mm | 30 – 90 bags/min | ± 0.2% – 0.5% | Lap Seal / Fin Seal | Delta Dual-Servo Motion System |
| LW-BS500 Industrial Bulk | 150 mm – 520 mm | 20 – 60 bags/min | ± 0.2% | Gusseted Back Seal | Schneider Servo + Pneumatics |
| LW-BS-LIQ Continuous Liquid | 60 mm – 280 mm | 40 – 110 bags/min | ± 0.3% | Hermetic Liquid Back Seal | Sanitary CIP Servo Pump Unit |
Industrial Applications & Material Handling
From ultra-fine pharmaceutical formulations to chunky food granules and viscous pastes, Ludyway back seal machines adapt seamlessly.
Food & Confectionery
Coffee powder, instant beverage mixes, granulated sugar, spices, seasoned flour, oatmeal, snacks, candy sticks, and dried fruits requiring high-barrier seals.
Food Machinery →Pharma & Health
Cold granules, oral rehydration salts, probiotic powders, collagen peptide stick packs, multivitamin crystals, and medicinal herbs under cleanroom standards.
Pharma Systems →Cosmetics & Daily Care
Travel-size shampoo sachets, skin whitening creams, serums, liquid soaps, body wash, bath salts, and single-use cosmetic samples.
Cosmetic Solutions →Agrochemicals & Industrial
Pesticide granules, plant fertilizers, descaling powders, industrial grease, household detergent powders, and water treatment chemicals.
Chemical Machinery →Ludyway Machinery: 30+ Years of Precision Engineering Excellence
Ludyway is one of the largest and most technologically advanced packaging machine manufacturers in China. Backed by over three decades of core mechanical design expertise, we specialize in turnkey packaging equipment for the food, pharmaceutical, health, and chemical sectors.
Supported by a state-of-the-art 20,000㎡ manufacturing facility, over 130 packaging specialists, and 200+ precision CNC processing units, Ludyway produces more than 50 intelligent packaging machine models. Our automated back seal and multi-lane stick packaging lines operate with high reliability across more than 100 countries and regions.
International Certifications & Strategic Brand Partners
Every Ludyway back seal packaging machine strictly adheres to CE, ISO 9001, cGMP electrical, and pressure vessel safety standards.
Trusted by Multinational Manufacturing Enterprises
Back Seal vs. 3-Side Seal vs. 4-Side Sachet Formats
Comparing structural dynamics, film consumption metrics, and line speed capabilities across standard industrial flexible packaging formats.
| Packaging Parameter | Back Seal (Pillow / Stick) | 3-Side Seal Format | 4-Side Seal Sachet |
|---|---|---|---|
| Seam Configuration | Single central vertical seal along the spine; top & bottom transverse seams. | One folded bottom or side edge with 3 sealed perimeter borders. | All four perimeter sides thermally or ultrasonically bonded. |
| Film Consumption Efficiency | Highest (up to 25% savings) due to minimal edge-margin overlap. | Moderate efficiency; required margins on three edges. | Lowest efficiency; wide perimeter borders consume extra film. |
| Front-Panel Branding | 100% uninterrupted display surface without front/side seam obstruction. | Border seams restrict graphic visibility on perimeter margins. | Side seams reduce flat printable visual zone significantly. |
| Volumetric Capacity | Deep pillow expansion allows high-volume packing in compact footprint. | Limited expansion capacity; best suited for flat items. | Flat profile; requires larger dimensions for equivalent volume. |
| Production Speed Potential | Ultra-High (up to 480+ packs/min on multi-lane servo setups). | Medium (40 – 100 packs/min). | Medium-High (50 – 250 packs/min depending on lanes). |
| Best Suited Products | Sugar, coffee, nutrition powders, granules, snacks, single-serve liquids. | Face mask sheets, wet wipes, flat medical sample pouches. | Pharmaceutical powders, high-end cosmetics, condiments. |
Frequently Asked Questions: Back Seal Packaging Machines
Get direct answers from our engineering team on film specifications, format changeovers, dosing tolerances, and maintenance schedules.
What flexible packaging film substrates are compatible with Ludyway back seal machines?
Our back seal packaging systems handle virtually all heat-sealable and ultrasonic laminates, including PET/AL/PE, PET/PE, OPP/CPP, Aluminum Foil barriers, recyclable mono-material Polyethylene (PE/PE), and compostable PLA paper laminates with thicknesses ranging from 45 μm to 140 μm.
How long does it take to change over pouch sizes and forming collars?
Featuring tool-less quick-disconnect forming shoulder designs, a complete pouch width changeover takes less than 15 to 20 minutes. Length adjustments, photo-eye registration, and volumetric dosing corrections are executed digitally directly via the touchscreen PLC interface.
Can back seal packaging machines accommodate modified atmosphere packaging (MAP / Nitrogen Flushing)?
Yes. We integrate high-purity nitrogen gas flushing channels through the forming tube collar, reducing residual oxygen levels to below 0.5% – 1.0% to extend shelf life for ground coffee, milk powder, roasted nuts, and pharmaceutical active ingredients.
How do you prevent powder dust build-up in the longitudinal back seal zone?
For dusty fine powders (flour, starch, talc, whey protein), our machines utilize closed negative-pressure vacuum dust extractors positioned at the filling funnel discharge, along with anti-static ionizing bars and intermittent pouch-tapping vibrators to ensure the seal area remains pristine.
What is the difference between a Fin Seal and a Lap Seal on a back seal machine?
A Fin Seal bonds the inner heat-sealable layers together (inside-to-inside), creating a prominent vertical fin ideal for heavy-barrier aluminum laminates. A Lap Seal overlaps the outer layer onto the inner layer (inside-to-outside), requiring heat-sealable coatings on both sides of the film and delivering an ultra-flat, film-saving back seam profile.
What ongoing maintenance routines ensure 24/7 continuous production reliability?
Ludyway machines are engineered with centralized self-lubricating bushings, quick-release heating elements, and Teflon-coated sealing jaws. Recommended maintenance includes daily jaw wiping, weekly sensor cleaning, and quarterly inspection of pneumatic valve manifolds and servo belt tension.
