The converting floor at the Fibre Converters plant in Constantine, Michigan

Extrusion. Laminating. Die cutting.

Three conversion processes, one plant, one tolerance carried across the whole sequence.

Buy one process or the whole line

Each process below stands on its own. The reason to run them in sequence is that the board never leaves the building, so there is no handoff between suppliers for variation to enter through.

Maximum die cut sheet

84 × 75 in

Coating applied

Polyethylene

Board stock

Recycled, virgin

Barrier liners

PE, foil

Processes on site

3 of 3

Molten polyethylene coating a kraft web between chill rolls on the extrusion line
01 Polyethylene meeting board at the die head

01

Extrusion coating

Molten polyethylene is applied directly onto the board as it runs through the line, bonding as it cools against the chill roll.

The result is poly coated board: a paper substrate that now carries a moisture or grease barrier the base stock could never provide on its own. It is the difference between a board that survives a humid warehouse or a wet assembly area and one that does not.

Because coating happens here rather than at a separate converter, the coated web can go straight into laminating or die cutting without being shipped, stored and re handled between operations.

Specify it by

Substrate
Recycled or virgin
Coating
Polyethylene
Barrier requirement
Moisture, grease
Coated side
One or both
The nip point where a paper web meets the chrome roller on the laminating line
02 Web entering the nip between chrome rolls

02

Laminating

Separate plies are bonded into one board, built up to the caliper and stiffness the finished part requires.

This is where a component stops being paper and starts being structure. A back panel that has to stay flat under load, a trim substrate that has to hold its shape through assembly, and a slip sheet that has to survive being dragged by a push pull attachment are all the same process solved at different constructions.

Grades are combined against the requirement rather than pulled from a standing catalogue: recycled paperboard, virgin kraft liner board, and specialty liners carrying polyethylene or foil barriers.

Specify it by

Ply count
To construction
Caliper
To specification
Liner
Kraft, PE, foil
Stiffness
To application
A cutting head travelling across a laminated sheet, with roll stock racked behind the line
03 Finished plies leaving the press

03

Die cutting

Laminated sheets are cut to profile at sizes up to 84 in by 75 in.

That envelope is the reason a part can leave here finished. Below it, you receive a component that drops into your assembly. Above it, someone has to cut it again somewhere else, which adds a supplier, a freight leg and a second chance for the dimension to move.

Specify it by

Maximum sheet
84 × 75 in
Profile
To drawing
Input
Laminated board
Output
Finished component

Material stock

Grades are selected against the specification. These are the families we convert from.

  • Recycled paperboard

    Multiple grades, the volume workhorse

  • Virgin kraft liner board

    Where strength and consistency lead

  • Specialty liners

    Polyethylene or foil barrier

  • Poly coated board

    Functional coatings applied on site

Choosing between the three

04 questions

Q.01 Do I have to use all three processes?

No. Each can be bought on its own. Running them in sequence in one plant removes the handoffs between suppliers, which is usually where variation enters a laminated component.

Q.02 What is the difference between laminating and extrusion coating?

Laminating bonds plies of board together to build caliper and stiffness, which is a structural job. Extrusion coating lays a polyethylene film onto the surface to create a barrier, which is a functional one. Plenty of components need both.

Q.03 Which process does my part need?

If it has to carry load or stay flat, start at laminating. If it has to resist moisture or grease, you need coating. If it has to arrive as a shape rather than a sheet, it needs die cutting. Most structural components touch at least two.

Q.04 How large a sheet can be die cut?

Up to 84 in by 75 in.

Tell us the part. We will tell you the process.

Send a drawing, or just describe what the component has to do and what it has to survive.