Umbergaon, Gujarat

Small runs First orders start at 5,000 pouches on 9-colour gravure Ask for a quote

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+91 91676 61011 info@spectrapack.co.in Get a quote
The production floor seen along a printing press

Infrastructure

A converting plant in Umbergaon

See the process
A pre-press operator checking a pouch layout on screen

Artwork and pre-press

Bring your finished design. Our in-house artwork desk prepares it for the press, so that what you approved on screen is what comes off the cylinders.

  • Colour separationYour artwork is split into up to nine inks, one cylinder for each.
  • Variant planningFlavours and sizes that share a layout are planned as single-cylinder or single-colour changes.
  • Shade matchingInks are mixed to your approved shade and matched again on every repeat order.

Process & machinery

Every machine in the 27,000 sq ft plant does something to a long reel of thin film. The film goes in plain and comes out printed, thicker, narrower, or folded into a bag. Here are the four steps, and the machines that run each one.

  1. 01PRINT

    Printing

    Your artwork is engraved into metal cylinders. Each cylinder turns through one ink and presses it onto the film, one colour at a time, up to nine colours. The method is called rotogravure.

    Engraving the cylinders is the costly part of a first order, which is why it carries a minimum quantity. When a variant shares the layout, we change a single cylinder or a single colour instead of the whole set, so a run of 5,000 pouches stays affordable.

    • 9 colours
    • 1,200 mm wide
    • 300 m/min
    • 5 tonnes a day
    Film passing over an inked gravure cylinder

    Machinery

    9 colour rotogravure printing machine

    9 colour rotogravure printing machine

    The main press. It prints your design onto the film, with web video and automatic register control to hold the print in position.

    • 9 colours
    • 1,200 mm
    • 300 m/min
    • 5-drive system
    6 colour flexo machine

    6 colour flexo machine

    A second, simpler press for polyethylene and polypropylene bags. It prints the front and the back in one pass.

    • 6 colours
    • 15 inch print
    • Tube + sheet film
    Doctoring and inspection machine

    Doctoring and inspection machine

    The quality check. It runs the printed roll past an inspection system and stops by itself when it finds a misprint.

    • 1,200 mm
    • 400 m/min
    • Auto detect + stop
  2. 02BOND

    Lamination

    Two or three different films are bonded into one sheet. A typical build is PET, aluminium foil and polyethylene: the outside carries the print, the middle blocks light and air, and the inside melts to form the seal.

    The choice of layers decides how long your product keeps. Solventless lamination leaves no odour, which is what food and pharmaceutical packs need.

    • 1,100 mm wide
    • 350 m/min
    • Solvent + solventless
    • Up to 150 micron PE
    Two films meeting at a lamination nip roller

    Machinery

    Combi lamination machine

    Combi lamination machine

    Bonds layers of film together. "Combi" means it runs both adhesive types, including the odourless solventless one.

    • 1,100 mm
    • 350 m/min
    • PET, foil, nylon, PE, PP, paper
  3. 03CUT

    Slitting

    The wide printed roll is cut lengthways into narrower reels, each one sized to the machine that will run it next.

    If you form and fill on your own line, this is where your order is finished. You receive reels, not pouches.

    • 1,100 mm wide
    • 400 m/min
    • Drum + cantilever
    • Shaftless unwind
    A wide roll being slit into narrower reels

    Machinery

    Slitting machine

    Slitting machine

    Cuts a wide roll into narrower rolls. Drum and cantilever slitting handle every film and laminate we run.

    • 1,100 mm
    • 400 m/min
    • Shaftless unwind + rewind
  4. 04FORM

    Pouching

    The film is folded and heat sealed into a finished bag, and the extras are added: a zipper, a spout and cap, a hang hole, a tear notch, or a one-way valve for coffee.

    Three pouching lines cover three-side and centre seal, side seal, and bottom seal formats, so most jobs have a machine suited to them.

    • 200 to 300 strokes/min
    • Minimum cut 50 mm
    • Zipper, spout, gusset
    Finished pouches coming off a pouching machine

    Machinery

    Pouching and cutting machine

    Pouching and cutting machine

    Turns flat film into three-side seal and centre seal pouches, with attachments for zippers, gussets and punches.

    • 200 strokes/min
    • Zipper + stand-up
    • D-cut, V-notch, euro punch
    Side sealing pouching machine

    Side sealing pouching machine

    Makes side seal pouches, including very small ones. The fastest of the pouching machines.

    • 300 strokes/min
    • Cuts from 50 mm
    • Tape attachment
    Bottom seal machine

    Bottom seal machine

    Makes bags sealed along the bottom from the softer films: LDPE, HDPE and polypropylene.

    • 200 strokes/min
    • LDPE, HDPE, PP
    • Centre slitting
    Spout fixing machine

    Spout fixing machine

    Welds the plastic spout and cap onto a liquid pouch. A semi-automatic machine alongside fits soft loop handles.

    • Spout + cap
    • Soft loop handles

Checked at every stage

Film is tested when it arrives, while it runs and before it leaves. The in-house lab checks each job against the product it will carry, and a certificate of analysis can travel with the consignment.

  • Seal strength and tensile testsConfirms that the pouch holds under the weight and handling it will meet.
  • Friction (COF), static and kineticConfirms that the film will run cleanly on a filling machine.
  • Thickness, oven and compression testsMicrometers, a hot-air oven and a compression tester check the laminate itself.
  • Inspection of every printed rollThe doctoring machine stops on a misprint so that it is cut out before pouching.
A seal strength test in the quality lab