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Study on several characteristics of three shopping bags

Edit:admin source:未知 Date:2018-10-16 19:28 viewed:

My mother went shopping on the weekend and came back with some nice shopping bags. And what I found was that these shopping bags were paper, non-woven, plastic. I was curious and asked my mother, "why are shopping bags made of so many materials? Which shopping bag do we use best?" Mom said these shopping bags are for you, you take them to study slowly! I got these shopping bags, and with the help of my dad, I started my shopping bag inquiry experiment.

In addition to the shopping bag, I found an electric kettle, scissors, electronic scales, asbestos shingles, chopsticks, three large glasses.

First, I used scissors to cut a rectangle on each of the three shopping bags and measured their length, width and weight respectively. Plastic bag sample: 12.5 cm long, 9.5 cm wide and weighs 10 g. Sample: 12.4 cm in length, 7.1 cm in width and 15 grams in weight. Cloth bag sample: 17.3 cm long, 8.5 cm wide, weighs 13 grams.

Next, I put three shopping bags into three tumblers, and pour boiling hot water into three tumblers. Five minutes later, I took out the sample blocks of three shopping bags with chopsticks and measured and measured the sample blocks. Plastic bag sample: 12.5 cm long, 9.5 cm wide, weight 11 g; Paper bag sample: 12.6 cm long, 7.2 cm wide, weight 30 grams; Cloth bag sample: 17.4 cm long, 8.6 cm wide, and weighs 15 grams.

According to the changes in length, width and weight of the three shopping bags, we can know that the three shopping bags have the best water-absorbing ability, followed by paper bags, cloth bags, and plastic bags. In other words, plastic is the best water-repellent. At the same time, also can be seen under 100 ℃, three kinds of shopping bags of heat resistance had no obvious difference. So, I want to explore the high temperature above 100 ℃ under the condition of three kinds of shopping bags of heat resistance.

I took three shopping bags and put them on the tile, heated them on the gas stove and timed them. Five minutes later, the plastic bags crumpled and got smaller, darker and pungent. The pieces of paper bags also turn black and white. The place where the patch of cloth fell close to the tile was wrinkled. My dad told me that if I kept heating them, and reached their point of ignition, all three shopping bags would burn. Experiments have found, however, that cloth bags are the most heat-resistant.

Through today's experiment, I learned to choose shopping bags of different materials reasonably according to different situations. When we choose to use shopping bag, we should consider not only convenience and beauty, but also environmental protection and durability.

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