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This cold cutting bag making machine produces T-shirt bags (vest bags), flat bags, handle bags, and perforated roll bags from LDPE, HDPE, and bio-compostable films. It runs a continuous web through servo-driven cold sealing and cutting stations — no heat, no cooling wait, no burnt edges. Shops supplying supermarkets, retail chains, food packaging converters, and wholesale bag distributors use this machine for medium-to-high-volume production where bag consistency and output per shift determine profitability.
T-shirt vest bags: Standard supermarket and retail carry bags with punched handle holes, produced at 120-200+ pieces/min depending on bag width and film gauge.
Flat bags / bottom-seal bags: Produce bags, bread bags, garment bags — sealed at the bottom with a clean cold-cut top edge, no heat shrinkage distortion.
Perforated roll bags: Continuous roll with perforation lines for tear-off use in fruit/vegetable section, deli counters, and hardware parts packaging.
Handle-hole bags: Die-cut or punched handle bags for boutique retail, takeaway, and garment packaging with reinforced handle areas.
Double-line simultaneous production: Twin-lane configuration produces two bag streams from one parent roll — doubles throughput on narrow-width bags without adding floor space.
| Application | Bag Width Range | Recommended Configuration | Typical Output |
|---|---|---|---|
| Supermarket T-shirt bags | 300-600 mm | Single-line, servo-driven, with handle punch unit | 130-180 pcs/min |
| Small produce/flat bags | 100-250 mm | Double-line with twin sealing heads | 200-280 pcs/min per line |
| Perforated roll bags | 200-500 mm | Single-line with perforation wheel + rewinding station | 80-120 m/min |
| Bio-compostable shopping bags | 350-550 mm | Single-line, ultrasonic sealing, reduced-tension feed | 100-140 pcs/min |
Bag manufacturers running 2-shift or 3-shift production who need consistent output across shifts with minimal operator-dependent quality variation. The servo-driven registration holds cut-length tolerance within ±0.5 mm from first bag to last.
Shops currently using heat-seal bag machines who are losing margin to cooling-time bottlenecks, electricity costs from running sealing bars at 180-220°C, and rework from burnt-edge rejects. Cold cutting eliminates all three.
Contract manufacturers supplying supermarket chains and retail brands where bag appearance directly affects end-customer perception — clean, burr-free seal lines and precise print registration are non-negotiable.
Producers entering regulated markets where food-contact bag standards require consistent seal integrity verified by batch. The cold-seal process produces a mechanically interlocked seam without thermal degradation of the film at the seal zone.
Operations with limited skilled labor — the HMI stores recipe parameters per bag SKU; changeover between bag sizes takes under 10 minutes with one operator, without mechanical adjustment of heater plates.
Startups producing under 500 kg of bags per day. A simpler heat-seal bag machine with lower capital cost will reach payback faster. This machine earns its premium above roughly 1.5 tons/day output where the speed difference compounds across shifts. See our standard bag making machines.
Shops running exclusively thick-gauge bags (above 80 microns). Cold cutting seal integrity peaks at 10-60 micron films — above 80 microns, conventional hot-bar sealing produces a stronger weld. For heavy-duty industrial bags, consider a heat-seal machine instead.
Operations that only produce small batches of widely varying bag sizes per day. If you change bag dimensions 8+ times per shift, the speed advantage of cold cutting is eroded by changeover downtime. This machine suits medium-to-long production runs.
Producers making zipper bags, slider bags, or gusseted stand-up pouches. This is a flat-bag cold cutting machine — not configured for zipper insertion, gusset forming, or multi-side seal pouch geometry. For those products, see our specialized bag making equipment range.
Not sure if cold cutting fits your production? Send us three numbers and we'll tell you within one business day whether this machine pays back against your current setup:
Your current daily bag output (kg or pieces)
Your typical bag film thickness (microns) and width range
Your electricity cost per kWh and current machine power rating
We run the math — specific payback estimate, no generic brochure. Send your numbers here.
Cold cutting replaces 180-220°C heated sealing bars with room-temperature mechanical or ultrasonic bonding. The seal forms by interlocking film layers under pressure at ambient temperature — the polymer chains mechanically entangle without melting and re-solidifying. This eliminates thermal shrinkage at the seal zone (common with thin-gauge LDPE under heat), removes the cooling dwell time from each cycle, and prevents the burnt-edge rejects that typically run 2-5% on heat-seal machines at speed. Unlike heat-seal machines where bar temperature must be re-trimmed when film gauge or ambient temperature changes, cold cutting seal quality is independent of thermal variables.
Independent servo motors control film feed, sealing head position, and cutting stroke — not a single motor driving all stations through mechanical linkages. The optical registration sensor reads printed marks on the film and the servo corrects position within one cycle, maintaining cut-point accuracy at ±0.5 mm even at maximum speed. On a heat-seal machine with cam-driven feed, registration drifts as mechanical components heat up across a shift — operators compensate by slowing down. With servo control, the first bag at 8:00 AM and the 50,000th bag at 4:00 PM share the same cut position. This matters when your customer's retail shelf display demands aligned prints.
On a heat-seal bag machine, roughly 30-40% of each cycle is cooling dwell — the film must solidify before the bag moves or the seal tears open. Cold cutting has zero cooling time. The seal is mechanically stable the instant the tool opens. This removes the single largest bottleneck in the bag-making cycle. Depending on bag length and film gauge, output gains range from 30% (long bags where feed time dominates) to over 100% (short bags where cooling was the dominant cycle fraction). At 400 mm bag length with 25-micron LDPE, a typical heat-seal machine produces 80-100 pcs/min — the cold cutting line delivers 160-180 pcs/min from the same film.
Heat-seal bag machines draw 3-8 kW continuously just to keep sealing bars at temperature, even when the line pauses. Cold cutting sealing stations draw power only during the brief sealing stroke — average running consumption for the sealing system is under 0.5 kW. Across a 24-hour operation at ¥0.8/kWh, the difference is roughly ¥60-150/day in electricity alone. Add avoided reject bags (no burnt edges), reduced air conditioning load (no radiant heat from bars heating the shop floor), and longer blade life (no thermal cycling stress), and the operational-cost advantage compounds.
Free bag sample run — send us your film roll, get back finished bags. We'll run your actual material on our demo machine and send you:
50-100 sample bags produced from your film at production speed
Seal strength test data (tensile pull test on the cold-seal seam)
Output rate measurement at your specific bag dimensions and film gauge
Video of the run so you see real speed and bag quality — not a trimmed demo
No cost. You pay freight for your film roll; we cover everything else. Arrange your sample run here.
Burnt-edge rejects spiking in summer. Heat-seal machines run hotter when the factory ambient temperature climbs past 35°C — sealing bars overshoot setpoint, film scorches at the seal line, and operators dial speed down to compensate. On a July afternoon with 38°C shop floor temperature, reject rates on heat-seal lines commonly jump from 2% to 8-10%. Cold cutting has no heated bars — ambient temperature does not affect seal quality. Output and reject rate stay flat regardless of season.
Seal strength variation between day and night shifts. Different operators set different heater temperatures based on feel and experience. The night-shift operator adjusts the temperature dial differently than the day-shift operator — same SKU, same film, different seal integrity. Cold cutting removes the temperature variable entirely. Seal quality depends on tool pressure and speed, both servo-controlled and stored per recipe. Operators select the SKU on the HMI; the machine reproduces the same sealing parameters every run.
Film sticking to heated bars after a line stop. On a heat-seal machine, when the line stops with film in the sealing station, the film melts onto the hot bar and creates a sticky residue that mars the next 10-20 bags after restart. Operators learn to yank the film out before it fuses — losing material and time. Cold cutting tools are at room temperature; a line stop creates no film adhesion, no residue, no wasted restart bags.
Voltage fluctuation shifting seal quality during peak hours. In industrial parks where grid voltage sags during peak production hours (9:00-11:00 AM, 2:00-4:00 PM), heated sealing bar temperature drops as the heater element sees lower voltage — producing weak seals that fail leak testing. Servo-driven cold cutting stations run through a regulated DC bus; seal pressure and speed are unaffected by ±15% mains voltage fluctuation.
| Scenario | Material | Typical Output | Recommended Config |
|---|---|---|---|
| High-volume supermarket bag contract (single SKU, 3-shift) | HDPE 12-18 μ | 180-220 pcs/min | Single-line, servo feed, auto stacker, online perforation |
| Mixed retail bag production (8-12 SKUs, frequent changeover) | LDPE 20-35 μ | 120-160 pcs/min | Single-line, recipe-stored HMI, quick-change punch die, motorized width adjustment |
| Compostable/biodegradable bag production | PLA/PBAT blend 15-25 μ | 100-140 pcs/min | Ultrasonic sealing, reduced-tension unwinder, non-stick tool coating |
| Narrow produce bag double-line production | LDPE/HDPE 10-18 μ | 250-320 pcs/min total (both lines) | Double-line, twin sealing heads, independent tension control per lane |
Unwinding & tension control: Film roll mounts on the motorized unwinder with closed-loop tension feedback. A dancer roller senses film tension and adjusts unwind speed to maintain constant web tension — critical for thin films under 15 microns that stretch or wrinkle easily.
Registration sensing: An optical sensor reads printed registration marks on the film. The servo controller calculates the exact feed distance to the sealing/cutting station and adjusts feed-roll position for each bag cycle.
Film feeding: Servo-driven feed rollers advance the film to the programmed bag length. Feed length, acceleration, and deceleration ramps are stored per recipe — aggressive ramps for thick film, gentler ramps for thin gauge.
Cold sealing & cutting: The sealing/cutting head descends. Ultrasonic horn (or precision mechanical blade set) applies high-frequency vibration or concentrated pressure at the cut line — bonding film layers and simultaneously separating the bag from the web at room temperature.
Handle punching (optional): If producing T-shirt bags, the punched hole die cuts handle openings immediately after the bag is formed. Punch position relative to the bag top edge is programmable.
Stacking or rewinding: Finished bags are collected by the automatic stacking table (counts preset number per stack, ejects completed stack) or wound onto a rewinding roll for perforated roll-bag production. Stack count, ejection interval, and conveyor speed are adjustable from the HMI.
| Option | What It Does | Suited For |
|---|---|---|
| Double-line configuration | Two parallel sealing/cutting stations process two bag streams from one parent roll | Narrow bags under 300 mm width; doubles output without adding a second machine |
| Ultrasonic sealing module | Replaces mechanical cold blade with 20 kHz ultrasonic horn for seal formation | Bio-compostable films, multi-layer films, or applications needing documented seal-strength data |
| Motorized width adjustment | Servo-driven guide rails adjust bag width from the HMI — no manual wrenching | Shops with 6+ bag width changes per shift; cuts changeover from 15 min to under 5 min |
| Online perforation wheel | Adds a perforation line at programmed position for tear-off bag production | Roll-bag production for produce section, deli, hardware retail |
| Handle punch unit | Die-cut or hot-pin punch module for T-shirt bag handle holes | Supermarket and retail vest bag production; interchangeable die sets for different hole shapes |
| Automatic stacking & conveyor | Counts bags per stack, ejects completed stacks onto output conveyor | High-volume lines where manual bag counting and stacking is the labor bottleneck |
| Corona treatment station (inline) | Treats film surface before bag forming for downstream printability | Producers who print on finished bags and need dyne level above 38 mN/m |
Location: Ho Chi Minh City, Vietnam — supermarket bag supplier
Machine: High-Speed Cold Cutting Bag Making Machine, single-line with handle punch
Film product: HDPE T-shirt bags, 18 microns, 400 mm width
Before: Running 3 heat-seal bag machines producing 85 pcs/min each (255 pcs/min total) across 12 operators per day. Monthly electricity bill for the bag-making section: ~¥4,200. Reject rate averaged 4.5%, mostly burnt edges caught at final QC.
After: Two cold cutting lines replaced all three heat-seal machines. Combined output: 340 pcs/min. Electricity down to ~¥1,800/month. Reject rate dropped to 0.8%. Operator headcount reduced from 12 to 8 (operators reassigned to printing and packing sections).
Payback: 14 months from electricity savings, labor reallocation, and reduced material waste.
15+ years manufacturing bag and film equipment in Jiangyin, Jiangsu — machines running in 30+ countries across Southeast Asia, Middle East, Africa, and South America.
CE-certified electrical and safety systems on all export machines. Each machine ships with full wiring diagrams, PLC program backup, and spare parts catalog — not just a user manual.
Pre-delivery factory acceptance test (FAT) on every machine: We run your specified bag dimensions on your actual film material (or a close match) at production speed before crating. You receive test data and video before the machine leaves our floor.
2-year warranty on main drive components, 1 year on electrical systems. Spare parts shipped within 48 hours of diagnosis confirmation — we stock critical items (sealing tools, servo drives, sensors) in inventory, not made-to-order.
Installation and training support: Remote video-guided commissioning as standard; on-site engineer available for complex line integrations. Training covers daily operation, recipe setup, preventive maintenance schedule, and common troubleshooting — delivered to both operators and maintenance staff.
LDPE, HDPE, LLDPE, and bio-compostable films (PLA/PBAT blends) in the 10-80 micron range. For films above 60 microns, seal strength testing is recommended — we can run samples on our demo machine to confirm. The machine is not suitable for PP film (too stiff for cold sealing) or laminated multi-layer films with aluminum foil layers.
Speed depends on bag length, film gauge, and material type. At 400 mm bag length with 25-micron LDPE, expect 160-180 pcs/min in single-line configuration. At 200 mm bag length with 18-micron HDPE in double-line, total output reaches 280-320 pcs/min. These are sustained production numbers — not peak cycle rates at reduced quality. We provide output estimates for your specific bag dimensions as part of pre-sale technical review.
For films under 60 microns, cold cutting seal strength equals or exceeds heat-seal strength in tensile peel testing. The mechanical interlocking of polymer chains at the seal line produces a seam that is actually stronger than the surrounding film in many cases — the bag will tear in the film body before the seal fails. For heavy-gauge industrial bags above 80 microns, hot-bar sealing produces higher absolute seal strength.
Yes. The optical registration sensor tracks printed marks and the servo adjusts feed position per cycle. Registration accuracy is ±0.5 mm at maximum speed. For reverse-printed film (print on inside surface), specify the sensor type at order — we configure the appropriate contrast sensor for your print-to-substrate color combination.
Standard configuration handles 100-700 mm bag width (lay-flat). Wider than 700 mm is available as a custom specification. Minimum bag length is 50 mm; maximum is 1200 mm. For bags narrower than 100 mm, the double-line configuration is recommended to maintain throughput.
Standard configuration machines: 25-35 working days from order confirmation and deposit receipt. Machines with custom specifications or non-standard options: 40-55 working days. Sea freight transit time varies by destination port — typical door-to-port time to Southeast Asia is 7-10 days, Middle East 15-20 days, South America 25-35 days.
Bag width and length range (min/max), film material and gauge, desired output target (pcs/min or kg/day), whether T-shirt bags (with handle holes) or flat bags, single-line or double-line preference, and any specific options (ultrasonic sealing, auto-stacker, perforation). If you produce multiple bag SKUs, share the three most common sizes — we'll configure for those and check compatibility with the rest.
We don't offer formal trade-in programs, but we can evaluate your existing equipment for potential resale through our network of used-machinery contacts in Southeast Asia and Africa. This can offset part of the new machine cost. Ask during quotation.
The sealing/cutting tools require inspection every 200 operating hours — check blade edge condition and ultrasonic horn surface (if applicable). Tool replacement interval is typically 2000-3000 hours depending on film type and gauge. The servo motors and drives are sealed units with bearings rated for 30,000 hours. Daily: clean film dust from the optical sensor lens and check tension roller bearings for free rotation. Weekly: inspect timing belt tension on feed rollers. Monthly: check and re-torque sealing head mounting bolts. We provide a detailed preventive maintenance checklist by operating hours.
Standard package includes remote video-guided commissioning — our engineer walks your team through setup, calibration, test run, and operator training over video call (typically 2-3 sessions of 3-4 hours each). On-site installation and training by a MINGYANG engineer is available at additional cost (engineer travel + per-diem). Most customers complete commissioning successfully with remote support alone — the machine ships pre-calibrated and pre-tested.
We stock critical spare parts (sealing tools, servo drives, sensors, timing belts, bearings) in inventory. Standard wear parts ship within 48 hours of order confirmation. Non-stock custom parts: 5-10 working days. Each machine ships with a recommended 12-month spare parts list with part numbers and expected service life. We don't lock parts behind proprietary connectors — standard industrial components are sourceable locally if urgent, and we provide the generic part specifications.
Training covers three levels: (1) daily operation — start-up, shutdown, recipe selection, bag size changeover; (2) quality control — seal inspection methods, registration check procedure, tension adjustment for different films; (3) preventive maintenance — cleaning schedule, tool inspection, belt tension check, sensor calibration. Training is delivered during commissioning (remote or on-site) and we leave written SOPs in English. Refresher training via video call is available at no charge within the warranty period.
Tell us what you need to produce. Be specific — the more data you share, the more accurate the configuration and quote we can deliver, typically within 2 working days.
Your bag dimensions: width range (min-max in mm) and length range (min-max in mm)
Bag type: T-shirt vest bags, flat bags, perforated roll bags, or mixed
Film material and typical gauge (microns): LDPE, HDPE, bio-compostable, or other
Target daily output: kg/day or pieces/day per shift
Single-line or double-line preference (if unsure, share your factory floor width — we'll advise)
Special requirements: ultrasonic sealing, inline perforation, handle punch, motorized width change, corona treater
Your factory electrical supply: voltage, phase, frequency (e.g., 380V 3-phase 50Hz)
carrie@jymingyang.com | +86-189-6169-1127
Or send your requirements directly through the contact form and we'll respond with a preliminary configuration and estimated output data within 48 hours.
High-Speed Cold Cutting Bag Making Machine
