A complete flexible packaging production line is not seven machines standing in a row. It is seven stages and six handovers, and the line runs or stops on the handovers. Film leaves the extruder and takes print on the press. It gains a barrier at the laminator, then arrives at the bag machine at a width and a hardness that machine can use. Every one of those moves is a place where two machines have to agree on tension, width, hardness and roll diameter.
That is the case for buying a complete flexible packaging production line supplier China rather than seven purchase orders, and it has nothing to do with a discount. The interfaces get defined by the same party that defines the machines.
THE SEVEN STAGES, IN ORDER
| Stage | Machine in this range | What the handover must align |
|---|---|---|
| 1 Extrusion | ABC-1800 | Cross-web thickness deviation, because it sets downstream register and flatness |
| 2 Printing | Master Series FFS · YTE81000 · YTE61000 | Register held at running speed, not only at crawl |
| 3 Lamination | XPM-1080RN · XPM-1100J · WRJ Fi9 · WRJ i9 · S1 | Coating weight across the full width, and the seal edge |
| 4 Curing | A room, not a machine | Bond strength ready before slitting |
| 5 Slitting | CLFQ-W1100 · 1300 Type | Finished roll width and hardness |
| 6 Core cutting | Q5-1200 | Core length tolerance, where one millimetre surfaces three stages upstream |
| 7 Material | Finished film and extrusion-grade resin | Substrate chosen for the machine, not for the stockroom |
Read the third column and the line stops looking like a shopping list. It looks like six agreements. The XIAOPAI range covers all seven stages, which is why the handovers can be written down at all.
STAGE ONE: THE FILM SETS THE CEILING
Nothing downstream can beat the film that comes off the die. A web with uneven thickness will not register on the press and will not laminate flat, and no amount of press tuning fixes it.
The ABC-1800 three-layer line addresses that at the source. Three extruders meter separately, so slip and anti-block additives stay in the skin where they work instead of being spread through the whole wall. Internal bubble cooling holds the frost line steady as the line accelerates. At LDPE 0.15 to 0.20 mm the thickness deviation stays inside ±4 %, and that one figure is what the press inherits.
Take haul-off at 100 to 120 m/min, output 200 to 300 kg/h, layflat to 1600 mm, film from 0.013 to 0.20 mm, rewind to φ1000 mm. The same die runs LDPE, LLDPE, MLLDPE and HDPE without a change, which is how one machine covers bag types that used to come from two suppliers. Layer structure and film selection both start from this stage, not from the bag.
STAGE TWO: PRINT HAS TO HOLD AT SPEED
A register figure stated at crawl tells a buyer nothing. The number that matters is the one held while the press is running, because that is when the web is moving and the tension is working.
Two builds share one platform and one 960 mm print width. The YTE81000 prints eight colours at ±0.08 mm, with a 500 m/min mechanical ceiling and 350 to 450 m/min in production. The YTE61000 prints six at ±0.1 mm and up to 400 m/min. Both are gearless, both run sleeve plate cylinders and ceramic sleeve anilox, both splice at unwind and rewind without stopping.
For heavy sack film there is a third build. The Master Series FFS prints four colours at 700 mm. Printing, embossing and gusset folding run in one pass at 150 m/min, on 25 tonnes and 100 kW. Folding depth runs 0 to 100 mm, embossing 0.2 to 0.5 mm.
What the next stage receives is a printed web with a known register and a known residual tension. Web path design decides how much of that survives the trip to the laminator.
STAGE THREE: TWO WAYS TO MAKE ONE SHEET
Lamination is where two webs become one, and this range offers two routes for two different jobs.
The solventless range bonds with a two-component adhesive at 100 % solids, so there is no drying oven and no solvent recovery. WRJ Fi9 runs three layers at 1050, 1350 or 1650 mm and 450 m/min with full recipe management. WRJ i9 runs two layers at the same widths and the same speed. S1 runs two layers at 1350 mm and 500 m/min, built for shops that change jobs often and want the changeover handled digitally. These machines are built by SINSTAR in Chongqing, and XIAOPAI supplies them as the authorized global distributor.
Hot-knife lamination answers a different question. XPM-1080RN takes sheets to 1080 × 1500 mm and feeds about 15 000 an hour. Machine speed is 105 m/min, with 80 to 100 m/min on a rotary knife and 70 to 80 m/min on the hot knife. The knife is the point. It stays at working temperature and seals the cut edge as it cuts, so a 200 to 400 gsm folding carton does not delaminate at the die-cutter. Above 127 gsm the hot knife takes over from the rotary blade, and surface treatment is what decides how well the bond holds.
STAGE FOUR: THE CURING ROOM IS A SPACE
Solventless adhesive cures by chemical reaction, not by evaporation. The roll still needs time and temperature before it reaches full bond strength. Two-layer structures usually take 24 hours. Aluminium foil or a high-barrier layer takes longer.
This is why the curing room belongs in the layout drawing, not in the week after commissioning. A laminator that runs fast into a curing room that cannot hold the rolls simply moves the queue. Tooling condition upstream and curing capacity downstream both show up here as schedule, not as speed.
STAGE FIVE: SLITTING DECIDES THE FINISHED ROLL
The bag machine only accepts what the slitter hands it. Width and roll hardness come off this stage, and so does most of the scrap that never gets blamed on the slitter.
CLFQ-W1100 is the duplex machine. It takes a 100 to 1100 mm web and slits from 30 to 1100 mm, at 400 m/min mechanical and 350 m/min in cut. Unwind is φ1400 mm, rewind φ1100 mm on 3 inch cores, on 23 kW and 4000 kg. 1300 Type is the horizontal machine. Fixed widths run 450, 600, 650 or 900 mm, at 200 m/min mechanical and 150 m/min cutting. Unwind is φ1500 mm, rewind φ400 mm, with ten circular knives on one shaft.
One machine is for plants that report a different strip width every day. The other is for plants that run a few fixed widths all week on heavy stock.
STAGE SIX: THE CORE IS ONE MILLIMETRE
A paper core cut one millimetre long makes the roll run off-centre on the unwind shaft. That shows up as a tension wave three stages upstream, on machines that have nothing to do with the core.
The Q5-1200 cuts tube length from 10 to 1500 mm, diameter 50 to 200 mm and wall 1 to 20 mm. It cuts in 0.5 s at 0.01 mm resolution, on a 2300 × 750 × 1800 mm frame weighing 800 kg.
STAGE SEVEN: THE RESIN FOLLOWS THE MACHINE
Substrate gets picked to suit the line, not to suit what happens to be in the warehouse. A structure that needs a third layer stops at a two-layer laminator. A film that will not hold register at 400 m/min stops at the press. The material decision and the machine decision are the same decision, taken twice.
WHERE A LINE ACTUALLY BREAKS
Not inside a machine. At the handover. Tension, width, roll hardness and roll diameter have to line up at every one of the six joints, and the line is only as good as its weakest joint.
This is why the range is grouped by process rather than alphabetically. How a slitter pairs with a laminator, and how film thickness pairs with a press, is the part that decides whether the line runs. Maintenance discipline keeps those joints in tolerance after the warranty ends.
WHAT ONE SUPPLIER ACTUALLY CHANGES
Buy the seven machines separately and you own six interfaces that nobody owns. The laminator is specified against a press from another supplier. The slitter is specified against a bag machine that has not been chosen yet. When a roll comes off spec, each supplier can point at the joint instead of at the machine.
Buy the line from one party and the interfaces get written by whoever wrote the machine specs. Composite machine specified against the press. Slitter specified against the bag machine. One contract, one specification, one technical contact from layout drawing to warranty.
A complete flexible packaging production line supplier China buyers can hold to one contract changes the paperwork as much as the machines. Wenzhou Xiaopai Electric Power Technology Co., Ltd. works with an audited pool of specialist builders, three to five qualified manufacturers per equipment category, and assembles a line from that pool around the buyer's product. Six process stages, twelve machine models, one interface owner.
SIX ANSWERS BEFORE A LINE IS SPECIFIED
The finished pack: structure, dimensions, fill weight and seal type, with a physical sample if one exists. Output: how many metres or kilograms per shift, and how many shifts a week. Substrate: film, foil, paper and grammage, and whether the structure has to be compostable or mono-material. Site: available floor area, clear height, power and air capacity. Print: colour count, artwork, and the register tolerance your customer will accept. Timing: when the line has to be running, because that decides whether the schedule is built around sea freight or something faster.
XIAOPAI answers those six with a specification rather than a catalogue page, and the seven stages get specified against them. That is what a complete flexible packaging production line supplier China is for.
XIAOPAI supplies the flexible packaging line as an authorized distributor, working with the builders who make each stage. The solventless laminating machines in this range are built by SINSTAR in Chongqing. Configuration lists, delivery schedules and commercial terms are issued separately for each project.
