Investigating the Best Material for Food Bags
John Boyd Dunlop's invention of the pneumatic rubber tire revolutionized travel comfort, inspiring an investigation to find the most suitable material for a sausage roll bag. Explore various paper types and their uses with a focus on grease and water-resistance. Plan a fair test to determine the optimal material.
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LO: To plan an investigation to find the most appropriate material for a food bag.
Who was John Boyd Dunlop? John Boyd Dunlop He lived in a city called Belfast. John s work involved a lot of travelling. In those days many streets were cobbled which meant that they were very bumpy. Roads between towns which were not cobbled were often not very good and had lumps and holes in them. The wheels of carriages had metal round the outside and they were very hard. This meant that you were bounced about a lot when you travelled and it was very uncomfortable. John Boyd Dunlop invented a rubber tyre that had air in between the inner and outer layer, instead of solid rubber. The new tyres were a bit like a balloon, squashy enough to change shape a bit when they went over lumps and bumps but not squashy enough for the rider to feel the road underneath. It worked really well
The Dunlop Rubber Company that made the first tyres still exists today. Across the world, over a billion tyres are made each year. John Boyd Dunlop became very famous because of his invention which made travelling more comfortable for everyone. He even became friends with Queen Victoria. He is remembered today and his picture is on the 10 note used in Northern Ireland.
I can plan an investigation for the most appropriate materials for a food product. Like John Dunlop, we will be finding the best material but for a sausage roll bag.
Food bags used to hold food. The best bags for a sausage roll/samosa Look at the different types of paper. For example: newspaper, baking parchment, napkin, paper bag, normal paper, tissue paper. What are these used for for food? e.g. Newspaper for fish and chips. Greaseproof paper for sandwiches. Paper bags to hold food from shops etc. Some of the papers need to be grease-resistant paper and some to be water-resistant paper, e.g. taking food home on a rainy day, carrying fried foods, wrapping up sandwiches that have moist ingredients.
Planning your investigation You will be investigating which material would be best for making a bag to hold sausage rolls or samosas. The bag needs to cope with the grease of the food. Watch the video below that explains the meaning and importance of a fair test. https://www.bbc.co.uk/bitesize/topics/z2ddmp3/articles/zpctrwx When we carry out our investigation next week, we will need a small amount of oil and as many types of paper as possible, ideally 5. Newspaper Baking parchment Napkin Paper bag Normal paper Any other alternatives
Activity: Investigation Plan Use the separate work sheet found on the school website/teams file to plan the experiment we will carry out next week. Use the following information to help you: We are investigating the greaseproof properties of papers using oil. We will drop oil on each type of paper and see if the oil seeps through to the back. It will be a fair test because we will drop the same amount of oil onto each type of paper. WE WILL COMPLETE THE INVESTIGATION NEXT WEEK.
