Cardboard cores · manufacturer
Cardboard cores from the manufacturer.
We produce cores with an inner diameter from 28 to 250 mm and a wall from 2 to 15 mm, from standard cores for film and labels to heavy industrial cores for technical films and membranes. We cut them to the required length and select the wall so that, at the same crush resistance, the core weighs up to 20% less.
What we produce
What cores do we produce?
Inner diameters from 28 to 250 mm. For each core we give the wall and crush resistance, and the full values are in the parameter table below.
Core ∅ 28 mm
wall 2–3 mm · 1.4 kN
Food films and labels. Cut length up to 1600 mm. With a food-contact certificate.
Core ∅ 38 mm
wall 2–4 mm · 1.9 kN
Hand stretch film. Cut length up to 2200 mm. With a food-contact certificate.
Core ∅ 40 mm
wall 2–4 mm · 2.0 kN
Tapes and laminates. Cut length up to 2200 mm. With a food-contact certificate.
Core ∅ 45 mm
wall 3–5 mm · 2.6 kN
Technical films. Cut length up to 2600 mm. With a food-contact certificate.
Core ∅ 50 mm
wall 3–6 mm · 3.3 kN
Stretch film and paper. Cut length up to 3200 mm. With a food-contact certificate.
Core ∅ 76 mm
wall 4–10 mm · 6.1 kN
Machine stretch film and printing. The most common size for rolls that go onto a machine mandrel. Cut length up to 3200 mm.
Core ∅ 100 mm
wall 5–12 mm · 8.4 kN
Paper mills and textiles. Cut length up to 3200 mm.
Core ∅ 150 mm
wall 6–15 mm · 11.7 kN
Geotextiles and floor coverings. Cut length up to 3200 mm.
Core ∅ 250 mm
wall 8–15 mm · 15.2 kN
Heavy rolls and coiled steel. Cut length up to 3200 mm.
We produce other diameters or walls not on the list to order, from the very first batch. Describe your roll: weight, storage method and winder speed, and a technologist will agree the rest with you. Describe your roll
Parameters
Cardboard core parameters.
Crush resistance is given for the middle wall of the range, from a press test on a 100 mm long sample.
| inner ∅ | Wall | Cut length | Crush resistance | Strip grammage | Food contact | Typical application |
|---|---|---|---|---|---|---|
| ∅28 mm | 2–3 mm | up to 1600 mm | 1.4 kN | 120–160 g/m² | yes, hygiene certificate | food films, labels |
| ∅38 mm | 2–4 mm | up to 2200 mm | 1.9 kN | 120–160 g/m² | yes, hygiene certificate | hand stretch film |
| ∅40 mm | 2–4 mm | up to 2200 mm | 2.0 kN | 120–160 g/m² | yes, hygiene certificate | tapes, laminates |
| ∅45 mm | 3–5 mm | up to 2600 mm | 2.6 kN | 120–160 g/m² | yes, hygiene certificate | technical films |
| ∅50 mm | 3–6 mm | up to 3200 mm | 3.3 kN | 160–200 g/m² | yes, hygiene certificate | stretch film, paper |
| ∅76 mm | 4–10 mm | up to 3200 mm | 6.1 kN | 160–200 g/m² | on request | machine stretch film, printing |
| ∅100 mm | 5–12 mm | up to 3200 mm | 8.4 kN | approx. 200 g/m² | on request | paper mills, textiles |
| ∅150 mm | 6–15 mm | up to 3200 mm | 11.7 kN | approx. 200 g/m² | on request | geotextiles, floor coverings |
| ∅250 mm | 8–15 mm | up to 3200 mm | 15.2 kN | approx. 200 g/m² | on request | heavy rolls, coiled steel |
We produce other diameters or walls not listed in the table to order, from the very first batch.
Download without a form and without contacting a sales representative.
Our own production · Piekary Śląskie
Consistent parameters in every delivery.
We control the process from receiving the cardboard to the finished core. Every delivery of cardboard undergoes a detailed inspection before it goes onto the production line. We then form the cores according to the parameters in the order. Next, we condition them under controlled conditions in our drying rooms - it is this stage that determines the strength of the core. Finally, every batch undergoes quality control in our laboratory. This means every delivery has the same parameters as the test batch you approved.
- since 2015our own core production
- 2 millioncores a month
- 12production lines
- 28–250 mmdiameter, from standard to heavy industrial cores
Laboratory and R&D
A thinner wall at the same strength.
In the laboratory we look for the combination of adhesive and cardboard that allows the wall thickness to be reduced at the same crush resistance. Core weight drops by up to 20%, and the cost with it.
Thick wall8 mmmixed waste paper
- more cardboard in every core
- higher weight and a higher price
- higher product fee
- more waste after unwinding
Thinner wall6 mmrecycled cardboard
- the same or higher crush resistance
- up to 20% lower weight and a lower price
- lower product fee
- less waste after unwinding
Check whether a lighter core will hold your roll
Quality control of every core batch
We test every batch of cores in the laboratory before dispatch. We check three parameters, and we agree their values with you during the test batch.
Crush resistance
We carry out the test on a laboratory press, using a 100 mm long sample. The result shows what roll weight and what storage method the core will withstand.
Axial alignment
We check straightness along the entire length of the core to eliminate run-out when your material is wound on the line.
Moisture
We control the moisture of cardboard cores during conditioning and storage.
Production report
You receive the results of all tests together with the test batch.
Specialisation · heavy-duty cores
Cores for heavy rolls.
We specialise in producing heavy-duty cores for winding heavy materials such as thick films, reinforcement mesh, cables and membranes. We match them to the roll weight, storage method and machine mandrel.
- ∅150–250mm diameter
- 6–15 mmwall
- up to 15.2 kNcrush resistance
Industries
Which industries do we supply cores to most often?
We match the core to the material you wind on it. For each industry we show the parameter the technologist starts the selection with.
Printing houses and printing industry
Cores for rolls of paper and printing films that go onto a machine mandrel.
∅76 mm · 6.1 kNConstruction films and membranes
Large cores for heavy rolls of construction films and roofing membranes.
∅150–250 mmTechnical films and laminates
High grammages require a core that does not bend during winding.
wall 6 mm · 6.1 kNTextile industry
Rolls of fabric stored vertically need high crush resistance.
∅100 mm · 8.4 kNCables and wires
Heavy coils of cable and steel require cores with a thick wall and strong ends.
up to 15.2 kNAgrotextiles and geotextiles
Long rolls require very even core geometry along the entire length.
up to 3200 mm · ±1 mmPaper mills and labels
Cores for rolls of paper, labels and tapes, also with a food-contact certificate.
∅28–100 mmStretch film and packaging
Cores for hand and machine film. We also wind our own stretch film onto our cores.
∅38–76 mm
Another industry? Describe your roll and we will choose the core
Configurator
Build your core.
You choose the diameter, wall thickness and cut length yourself. We suggest the crush resistance based on the diameter and the parameter table.
1 · Inner diameter mm
2 · Wall mm
3 · Cut length mm
Your core
Order
How does ordering cores work?
A conversation with our technologist
About 15 minutes on roll weight, winder speed, storage and humidity in your hall. You get: a core proposal for your roll.
Parameters in writing
We select the diameter, wall and resistance in kN after laboratory tests. You get: the core parameters in writing.
Test batch
You test the test batch on your machine, with your roll. We start the series after your confirmation. You get: cores tested in your conditions before you order a series.
Scheduled deliveries
We keep stock of your item in our warehouse and deliver it with our own transport, on pallets secured with strapping. You get: cores from stock on the dates in your schedule.
We deliver orders within 10 days. See what the audit looks like
Video · Dominopack channel
Cardboard cores on video.
A video from our channel about cardboard cores and how to choose them.
Contact · sales department
Order cores from the manufacturer.
Call, write or leave an enquiry in the form. We will contact you, and you will receive our offer by e-mail.
For the conversation, have ready the inner diameter, roll weight and storage method. If you do not know them, we will check them as part of a packaging audit.
Questions
Questions about cardboard cores.
Which core suits stretch film?
For hand film the standard is a ∅38 mm core with a wall of 2 to 4 mm, for machine film ∅50 mm, and for heavier rolls ∅76 mm with a wall of 4 to 10 mm. We match the diameter to the mandrel of the stretch wrapper or winder, and the wall to the weight of the roll.
What does core crush resistance in kN mean?
It is the force at which the core loses its shape in a flat crush test on a press, using a 100 mm long sample. Our values range from 1.4 kN at ∅28 mm to 15.2 kN at ∅250 mm. We match this figure to the roll weight and storage method.
How to choose the core wall thickness?
On the roll weight, the storage method and how deep the core goes onto the mandrel. Strength is determined by the arrangement of the strips and the adhesive; the wall thickness alone says little about it. When in doubt, we make a test batch.
What is a ∅76 mm core used for?
For machine stretch film, printing and heavier rolls. A wall of 4 to 10 mm gives a crush resistance of 6.1 kN, and the cut length reaches 3200 mm. This is the most common choice where a film roll weighs a dozen or so kilograms and goes onto a machine mandrel.
What are the largest cores you produce?
Cores with an inner diameter of up to 250 mm, a wall of up to 15 mm and a cut length of up to 3200 mm. They withstand up to 15.2 kN in a flat crush test. Such cores are used for winding technical films, membranes, geotextiles and coiled cables.
How do you test cores?
We test every batch in the laboratory before dispatch. We check crush resistance on a press using a 100 mm long sample, the straightness of the core and its moisture content. You receive the results in writing together with the test batch.
Can the cores come into contact with food?
Cores from ∅28 to ∅50 mm are covered by a hygiene certificate and are used for food films and labels. For diameters from ∅76 mm upwards we issue the certificate on request, because it depends on the strip grammage and the intended use of the batch.
Can I buy small quantities of cores in the shop?
Yes. In the online shop you can buy smaller quantities of cores without talking to a sales representative.
How long does it take to introduce a new core dimension?
First we select the core parameters and you receive a test batch to check on your line. After your confirmation, we deliver the series order within 10 days.
How are cores transported?
We deliver cores with our own transport, on pallets secured with strapping. We are responsible for the delivery date and the condition of the load ourselves.
What about continuity of core supply?
We keep stock of your item in our warehouse, and deliveries follow your schedule. We produce film and cores on our 12 lines.
Where does the raw material for the cores come from?
We buy paper from leading European manufacturers.
Didn't find an answer? Describe your roll and we will choose the core.
Ask our technologist