Paper Towels

Paper Towels - Paper Towels Beginning Questions 1) How does...

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Paper Towels Beginning Questions 1) How does cost per sheet affect amount of water a sheet can absorb? - It doesn’t affect because the higher the cost, the more advertisement the towel uses. 2) How does cost per sheet relate to strength? - The higher the cost, the better strength it has because they more than likely put more effort into making their towel stronger. 3) How does the cost per sheet relate to how fast it absorbs water? - It doesn’t affect how fast water is absorbed because they will all absorb at the same amount of time. Beginning Procedures BQ 1) For this, we will take the number of sheets divided by the cost of the paper towels. We will then measure out water by mL and determine how many mL one towel can pick up. Then we will take the number of sheets divided by mL picked up to determine amount of water one sheet can pick up. BQ 2) We will take the number of sheets divided by cost. Then we will add weights to the end of each paper towel going up by grams. (This could be done with sand and weigh it at the end) Then we will take the number of sheets divided by cost divided by grams. BQ 3) We will take the number of sheets divided by cost. Then we will pour out water and time how fast it picks it up. Then we will take the number of sheets divided by time to determine the pick up speed. Procedures I. Wet Strength A) Put a 500 g weight on each corner right above the sink
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B) Put weight in 10 g increments on the center of the towel at 5 sec intervals until the towel breaks. C) After the first 2 trials, put 50 g less than the final recording right away then put 10 g increments. D) Record the weight minus last 10 g. E) Do all 10 trials for 5 brands. II. Dry Strength A) Tape the sides of the paper towel to the side of the sink (even sides that didn’t reach the edge) B) Stack weights in center of the towel by 10 g increments. C) First and second trials went slower to find approximate mass (50 g increments) D) For the next 8 trials, started at 1000 g and went up at 50 g increments E) After the weights broke through, took off the last 50 g that caused the tear. III.Absorbency Rate A) Put 30 mL in a 250 mL graduated cylinder. B) Roll the paper towel length wise C) Stick the paper towel in the cylinder until the bottom edge gets to the bottom of the cylinder and start timing.
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Paper Towels - Paper Towels Beginning Questions 1) How does...

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