WHAT A SOLVENTLESS LAMINATION MACHINE REMOVES FROM THE PLANT
Start with the oven. The builder's figure for comparable duty is around 60,000 kWh a year of heating energy that a dry laminator would spend, and the floor area under the oven and its ducting comes back with it. Then the residual-solvent test. Food, pharmaceutical and infant-nutrition structures pass release without one, because there is no solvent left in the laminate to migrate into the product. The third removal is start-up waste. A shorter web path means less film is lost before the bond lands inside specification, and on short runs that scrap shows up on the cost sheet every week. There is a trade the buyer should hear before the savings. The adhesive is supplied as two components that must be mixed at the right ratio, and the mixture has a working life measured in hours. A solvent line measures solvent and lets the oven take care of the rest. A solventless line has to get the ratio right at the head of the run, then use the mix before it turns. That is a discipline the shift has to hold, and it is why the digital platform on the S1 proportions the components automatically.THREE BUILDS, ONE SPEED BAND
WRJ Fi9 is the multi-layer machine: 1050, 1350 or 1650 mm wide, 450 m/min, five coating rollers, full recipe management. WRJ i9 is the two-layer machine at the same widths and the same 450 m/min, built on a deliberately reduced control system. S1 is the digital two-layer machine: 1350 mm, 500 m/min, and a controller that holds up to 300 work orders. Same adhesive chemistry, same nip logic, three different answers to the question of what the plant does between jobs.WHEN THE JOB MIX IS THE CONSTRAINT
If the plant runs many short orders, changeover time decides output long before speed does. S1 stores temperature, pressure and speed per job and recalls them by number, so a change becomes a data entry rather than an adjustment sequence. The operator enters a target coating weight once and the machine sets the metering, which removes the trial pass at the head of each job. The two adhesive components are dosed and mixed by the machine, so mix ratio and pot life stop depending on memory. The rollers are tungsten-carbide coated, roughly five times the wear resistance of hard chrome, and that matters because coating weight drifts as a chrome roll ages. Roll change and splicing on a coating line is where short orders lose their hours, not in the running speed. And coating weight measured in process is the difference between knowing that drift and finding it in a customer complaint.WHEN THE STRUCTURE NEEDS A THIRD LAYER
Fi9 exists for the structures i9 cannot reach: PET/Al/PE for pharmaceutical sachets and strip, PET/Al/PA/CPP for high-barrier retort and infant nutrition. Foil is usually the reason. A four-layer build also carries more settings than any operator should re-enter from a paper sheet, which is what recipe recall is for. Five coating rollers hold the adhesive film across 1650 mm, and that width is where edge-to-centre variation normally appears. High-barrier metallised BOPP is a fair test case. The barrier layer is thin, so an uneven adhesive film shows up as haze rather than as a bond failure, and haze is what a customer rejects first. Retort work is moving the same way, toward mono-material metallised structures that ask the laminator to hold tolerance on thinner, more temperature-sensitive webs.WHEN THE OPERATOR IS THE CONSTRAINT
i9 answers a different problem, the plant where the shift turns over and the machine has to produce without a specialist on hand. The control system is cut back and the operating sequence is short; the builder puts a beginner into production in two days. Multi-stage tension control with stable nip pressure keeps dissimilar materials flat without a trial run for every new combination. It is a two-layer machine by design, not a multi-layer machine sold below its capability, and the smaller footprint and lower power draw follow from that decision.THE CURING ROOM IS NOT A STOREROOM
Adhesive cures by reaction, so the roll is not finished when it leaves the nip. A common two-layer structure needs about 24 hours at controlled temperature to reach full bond strength, and foil or high-barrier builds take longer. Run the arithmetic. At 450 m/min an eight-hour shift lays down 216,000 m of laminate, and all of it has to sit somewhere for a day before the slitter touches it. That figure is arithmetic from the published speed, not a capacity promise, but the order of magnitude is the point. Curing area is a layout decision, taken with the machine, not a corner found after commissioning. Temperature control belongs in the same drawing, because a room that swings with the weather turns 24 hours into three days. A fast laminator with too little curing capacity still ships late, and the machine gets the blame.ADHESIVE WEIGHT ACROSS THE FULL WIDTH
Coat weight sits on both the cost line and the bond line. On a 1650 mm web the centre can hold tolerance while the edges drift, and the roll still looks correct on the outside. Closed-loop tension with coating-weight measurement keeps the figure inside tolerance run after run, and it turns a supplier's claim into a record the plant can show a customer. Ask for that record from a running line rather than from a lab sample, and ask what the machine does when a splice passes the nip at 450 m/min. A zero-speed splice still leaves a tension step in the web, and a bonded roll keeps the wrinkle that step creates.WHAT DOES NOT CHANGE BETWEEN THE THREE
Unwind and rewind at 800 mm diameter on Fi9 and i9, with S1 taking 1000 mm on the rewind. Shaftless loading and 3 inch plus 6 inch cores across the range. Fi9 and i9 list the same substrates: BOPP, PET, PE, CPP, PA, metallised film, aluminium foil and paper. The sequence at the nip is the same on all three. Choosing between them does not change how the plant feeds the machine or winds the finished roll, which is why the decision can be made on structure and job mix alone.WHAT TO COUNT BEFORE THE ORDER
Four numbers, all from the plant rather than from the catalogue. Orders per week and the average run length. Structures, counted by layer and by whether foil appears in them. Curing area in square metres, and whether it holds a day of output at the target rate. The skill level on the shift that will run the machine at six in the morning on a Sunday. Width follows from what the bag maker needs, not from what the machine can take. Get those four wrong and the fastest model in the range becomes the slowest line in the plant.WHERE THE MACHINE SITS ON THE LINE
Lamination is the third stage. Film leaves the extruder, takes print on a CI flexo printing platform, receives its barrier layer at the nip, cures, and is slit to the bag maker's width. Tension, width, hardness and diameter have to agree at every handover. The laminator's job is to hand a flat, bonded roll to the slitter at the right diameter. A machine chosen without those handovers in view usually surfaces as a slitting complaint three months later.WHAT XIAOPAI SUPPLIES
Wenzhou Xiaopai Electric Power Technology Co., Ltd. works with SINSTAR, which builds the WRJ range in Chongqing, and supplies the Fi9, i9 and S1 as an authorized distributor. XIAOPAI carries one interface from Wenzhou: configuration against the pack structure, and inspection before shipment with measured values in the report rather than photographs. The rest of the offer runs through installation. Foundation and alignment on site, a first production run on your own product, and operator training on the actual line all arrive under the same contract. XIAOPAI also keeps a spare-parts channel open for the life of the machine. The published specification for the solventless lamination machine range is the place to start, and the curing room belongs in the same conversation as the machine.ONE LINE FOR THE RECORD:
A solventless lamination machine runs at the same speed in all three builds, so the choice turns on layers, changeover and curing area rather than on metres per minute.
A solventless lamination machine runs at the same speed in all three builds, so the choice turns on layers, changeover and curing area rather than on metres per minute.
