Paperboard Hydrocarbon Extraction and LC-GC-FID Analysis Protocols
Paperboard LC-GC-FID testing requires ethanol swelling, mCPBA epoxidation, and accurate UCM baseline integration to verify MOSH and MOAH migration compliance.
Recycled Chipboard
Substrate Grade
An inexpensive, multi-ply paperboard grade is manufactured almost entirely from recovered waste paper and cardboard without a bleached chemical pulp top liner. Commonly used for stiffeners, partition dividers, and the grey backing of writing pads, recycled chipboard offers a cost-effective solution for non-contact packaging applications. It is made by bonding together several layers of secondary fibres on a cylinder machine.
The resulting board has a grey or brown appearance and a rough surface texture.
Manufacturing Process
Production of this grade utilizes mixed papers, old corrugated containers, and newsprint that have been repulped and cleaned of major contaminants. Because the stock consists of various recycled fibre lengths, the board has lower tensile strength and folding endurance than virgin packaging grades. To compensate for this, manufacturers increase the thickness to achieve the necessary stiffness for boxes and tubes.
The material is often laminated with a white paper liner or a plastic film when printability or moisture resistance is required.
Structural Constraint
Using this grade for direct food packaging is limited due to the risk of chemical migration from the recycled fibres. If the board comes into contact with moist or fatty foods, contaminants like printing ink residues can transfer to the product.