Corrugated cardboard


Why you should purchase your corrugated cardboard from THIMM: The company started its own corrugated cardboard production back in 1959. Today we produce the optimum corrugated cardboard for your requirements at many of our different locations.

Corrugated cardboard is a very natural and sustainable product

Corrugated cardboard is biodegradable and on average only requires 20 percent fresh fibres which are produced from windfall and thinning timber from sustainably managed forests. Raw paper and glue are used in the production of corrugated cardboard. Corrugated cardboard consists exclusively of renewable raw materials and can be easily recycled. This means that corrugated cardboard is a valuable ecological recyclable product and packaging made from corrugated cardboard is environmentally-friendly and sustainable.

We are independent when it comes to purchasing our raw materials for producing corrugated cardboard. As a result, we have continuously expanded our range of materials over the last few years, creating a number of completely new corrugated cardboard boxes and displays for you.

From the raw material to corrugated cardboard

The basic raw material used in the production of corrugated cardboard is corrugated cardboard raw paper. In Germany, this paper is made primarily of recycled paper, with a certain percentage of fresh fibres and starch glue. The paper is heated and moistened with steam. It is then passed through two gear-like, interlocking grooved rollers while pressurised and heated. In a manner of speaking, the corrugation is “ironed” into the paper. After that, the rills are coated in starch glue. Finally, press rollers are used to glue smooth paper to either side of the corrugated layer.

The finished corrugated cardboard is dried and cut into sheets. The corrugated cardboard die-cuts are then processed in the machinery to produce the packaging. Then the corrugated cardboard die-cuts can be printed using direct printing technology.

Digital corrugated cardboard production with digital printing

Another step in the direction of digitalisation: as a pioneer, THIMM is once again revolutionising the manufacturing process for corrugated cardboard of digitally printed paper with an innovative solution for the entire paper processing industry. 
In future, digitally printed paper rolls can be futher processed fully automatically on the corrugator. To this purpose, camera units installed on the currugator initiate automated order changes through QR-codes. The corrugator thus automatically carries out the necessary machine adjustments, and the further processing of digitally printed paper rolls on the corrugator is designed to be even more efficient and environmentally friendly. 
To this purpose, our printing experts integrate the  QR-codes into the printed image or on the chad at the customer's request instead of the previous markings. 
At the request of the customer, and thanks to the most modern digital printing technology, additional codes can be embedded in the printed image in unlimited numbers and used for customer services, for example, for digital corrugated cardboard production with digital printing

Traceability. Other recognisable codes can also be adopted as variable data in the printed image.
Analogue processes are replaced with this digital process optimisation. In future, manual intervention into the production process will be dispensed with, employees will be relieved of some of their burdens and savings of time- and materials will be increased.
With the revolutionising industry solution, several printed images can be further processed in small numbers on a digitally printed paper roll even more economically on the corrugator. In comparison to previous markings, the digital innovation also demonstrates that wider paper rolls can be printed becausse the QR-codes are considerably smaller and can be placed more advantageously.
The digital process optimisation for the automated corrugated cardboard manufacture of digitally printed paper rolls represents progress in the paper processing industry and great sustainability for the entire industry.
You can also read more here about digital corrugated cardboard production with digital printing.

Overview of the different types of corrugated cardboard

The corrugated cardboard industry uses a range of different types of corrugated cardboard:

  • Single-faced corrugated cardboard consists of one liner and one flute
  • Single-fluted corrugated cardboard, for example B-flute, consists of three paper webs
  • Double-walled corrugated cardboard or double flute: for example BC-flute
  • Multi-fluted corrugated cardboard for example heavy-duty corrugated cardboard, four-fluted; consists of nine paper webs

There are also special features such as in corrugated cardboard for food contact. This corrugated cardboard is made with 100 percent fresh fibres.
The different types of corrugated cardboard are combined from paper types, grammages and flute heights. Corrugated cardboard is differentiated according to the flute heights:

  • F-flute with a flute height of 0.6 to 0.9 mm
  • E-flute with a flute height of 1.0 to 1.8 mm
  • T-flute with a flute height of 1.7 mm
  • B-flute with a flute height of 2.2 to 3.0 mm
  • C-flute with a flute height of 3.1 to 3.9 mm
  • A-flute with a flute height of 4.0 to 5.0 mm
  • FE-flute with a flute height of 1.6 to 2.7 mm
  • EE-flute with a flute height of 2.7 to 3.2 mm
  • BE-flute/EB-flute with a flute height of 3.2 to 4.8 mm
  • BC-flute with a flute height of 5.3 to 6.9 mm
  • CAA-flute with a flute height of 11.1 to 13.9 mm

Corrugated cardboard raw paper: what are the differences?

Paper is the most important raw material for THIMM Group. We procure raw paper and print these paper rolls for further industrial processing. We also produce corrugated cardboard sheets and corrugated cardboard packaging.

What’s the difference between kraftliner and testliner?

Kraftliner is paper manufactured from coniferous woods, and is made up of at least 80 percent fresh fibres. Kraftliner paper makes very stable and firm corrugated cardboard raw paper.

Testliner is recycled paper. Unlike kraftliner it is made of 100 percent of waste paper. Testliner paper is generally of lower quality than kraftliner paper.

We almost exclusively procure the corrugated cardboard raw paper we use from suppliers who as a minimum are certified according to the Controlled Wood or the FSC® standard. The FSC® label (FSC® = Forest Stewardship Council®) is a worldwide recognised certification. For our customers, this means transparency along all processing phases of the paper supply chain.

About three quarters of our corrugated cardboard raw paper originates in Germany. We purchase the remainder from Scandinavia and Southern and Eastern Europe. Due to our high supply needs we can aggregate these into shiploads and achieve a more environmentally- friendly delivery than by HGV. The substitution of fresh fibre papers with products based on waste paper and the reduction of paper grammages are the most important developments in the market at the moment.

Since 2015 we have been offering our customers the “Starliner white” paper type which is a fresh fibre substitute which can also enable high-grade printing. We also have two modified paper types based on recycled paper which are alternatives with lower grammages.

Which is the best corrugated cardboard for your packaging needs?

The right type of corrugated cardboard depends on packaging requirements. For example, a specific packaging unit for engines for industry must be able to withstand different requirements to FMCG packaging. Therefore, packaging developers combine all the relevant information about the product and intended use when selecting the corrugated cardboard the packaging development. As well as a simple corrugated cardboard box, we will be pleased to give you more information about intelligent shelf-ready packaging solutions or transportation boxes. You can also obtain displays and special designs made from cardboard direct from the manufacturer.
Please contact us - we will be pleased to advise you about cardboard and our experts will know what the right solution is to meet your needs.