Introduction
Cellulose is the most used polymer in the world, that is why it is necessary to better understand the wide use and the making processes. Here's a video that explains what cellulose is and how it is produced.
Celuloze ir pasaulē vairāk izmantotais dabiskais polimērs. Celuloze ir daudzu augu sastāvdaļa, tādēļ šos augus izmanto tekstilšķiedras iegūšanai, ko izmanto dažādu izstrādājumu ražošanai. Šajā video tiek aprakstīts kas ir celuloze, kādām vajadzībām to ražo un kā to ražo.
Task
To give a better insight in to the uses of cellulose based products, the task involves two videos.
Watch the videos carefully and pay attention to the information explaining the processes of cellulose production and product use. Be ready to answer questions about each video. If needed watch the videos again.
1. Watch the full video and answer the questions given.
2. Answer questions about the first four minutes of the video. (0.00 - 4.11)
Process
Answer these questions about the 1st video:
1.What are the insulation product safety tests?
2. From what materials is the product made?
3. Name three steps of the manufacturing process.
4. In what time is the product made?
5. What is the R value?
Answer these questions about the 2nd video:
1. What trees are used to make paper in the video? (At least two)
2. Why are the wood chips cooked?
3. What methods are used to make the bleaching process environment safe?
4. How many liters of water is used to make 1 kilogram of paper?
5. How much percent (%) of the water used can be recycled?
Evaluation
The correct answers:
For the 1st video:
1. The smolder resistance test and open flameability test
2. Recycled paper and water
3. Separating the paper, shredding and removing pieces of metal, adding bore acid and mixing with the paper shreds.
4. Five minutes
5. The value which defines insulation resistibility to fire and air.
For the 2nd video:
1. Birch, poplar, beech, eucalyptus, spruce, fir, pine
2. To dissolve the lignin and separate plant fibers
3. It's chlorine free and instead uses oxygen and peroxide.
4. 100 liters
5. 90%
Conclusion
This web quest should improve the knowladge of cellulose use and production process of some cellulose based products.