They might be stained by coffee, stamped with company logos and marked with the misspelled names of the people who used them, but disposable cups manufactured by PE film coated paper cup forming machine are a good source of paper fibres for other products. Their plastic lining used to make recycling impossible, but paper manufacturer James Cropper has found a solution. Since 2014, the company has been upcycling old cups made by PE coated paper cup making machine into new sheets of paper.
based in Burneside, in the Lake District, the James Cropper plant's recycling machines separate the cups'plastic and paper. The plastic is sent away to be recycled elsewhere, but once the fibres are cleaned, they are mixed with unused virgin fibres, dye and hot water to form a pulp, the first stage of paper making.
The pulp is then injected on to a wire mesh conveyor belt, which keeps the fibres on top while letting the water fall through. It then passes through a set of felt-coated rollers, which squeeze out more water. After this, the material is solid enough to be wound through steam-heated rollers to dry the last of the moisture, before it is wound on to a roll as a finished product.
Step 1: Colour checking
James Cropper's colour expert Alison Rigg compares samples under different light sources. Due to a printing phenomenon called metamerism, different colours can look similar under certain light conditions, which must be accounted for when mixing new shades.
Step 2: Collecting
This bale of 50,000 used cups would previously have been destined for landfill. James Cropper works alongside McDonald's, Starbucks, Costa Coffee and Paper Round–a company that collects waste from offices in London–to gather the raw materials required for its recycling process.
Step 3: Mixing
After the paper is separated from the plastic, the pulped results are poured into a tank, or chest, along with dye. James Cropper's tanks vary in capacity from 1.5 tonnes to ten tonnes. The dye within is swapped very gradually with each refill from light to dark and back to minimise waste paper.
Step 4: Storage
Rolls of paper are stored at the James Cropper factory. Each contains ten kilometres of paper and weighs 4.5 tonnes. They are often cut into (707mm by 1,000mm) B1-sized commercial sheets, which can be used to print A1 designs, with room for bleed, before being shipped to buyers.
Step 5.1: Post-production
Technician Glenn Robinson operates G. F Smith's envelope-folding machines. Due to the machines'age, new operators have to learn from veterans how to use them, or pore over decades-old blueprints.
Step 5.2: Folding
The envelope-folding machines can make between 5,000 and 6,000 envelopes per hour, depending on the kind of paper used.
Step 6: Stacking
The warehouse shelves at G. F Smith tower 13 metres above ground and can only be accessed by an extending forklift. Their operators travel upwards along with the forks and are trained to abseil from the cab in case of malfunction.
A paper cup waxed made by double PE coated paper cup machine for frozen foods, containing ice cream, jam and butter.Heating water use paper cups coated plastic produced by single PE film coated paper cup machine, resistance to temperature above 90 ℃, can bloom even water.
Our country requires that the production and management of paper cups be upgraded to the level of food. Therefore, it is required that all paper cups sold in the market must have the QS quality and safety production license. The certificate number can be checked on the website of the state administration of quality and safety.