Plastic Wrap Strength
By: Isaac Starlin
Plastic wrap is known for protecting and preserving food due to its ability to stay flexible at very low temperatures and offers strong tear resistance. It is used as a convenience because it is flexible, light, cost-effective, transparent, tough and safe. These things along with its ability to protect against contamination, and to be an oxygen and water barrier help to prevent unnecessary waste and ensure food lasts longer.
Plastic wrap was originally made of PVC (Polyvinylidene Chloride) but in recent years companies have started going to LDPE (Low-Density Polyethylene). This change was made because it is considered safer for the body. The downfall of the newer version is that it is not as clingy as the original. Plastic wrap is made from polymers or long chains of carbon atoms linked together. The carbon atoms are held together with covalent bonds and these bonds are very strong. It takes a lot of energy to break a polymer. Plastic wrap is made of millions of inter-molecular interactions, each one is weak but when they are put together they are very strong.
3 types of plastic wrap
IV: Type of Plastic Wrap
DV: Amount of Weight the Plastic Wrap can holdCV: Glass Bowl, Size of the Piece of Plastic Wrap
Fold and place towel in bottom of bowl.
Measure 18 inches of plastic wrap and rip out of the box.
Place plastic wrap on top of the bowl.
Place a weight on top of the plastic wrap.
Continue to place weights on top of the plastic wrap until the plastic wrap breaks.
Record amount of weight that caused the plastic wrap to break.
Repeat steps 2-7 two more times.
Repeat steps 2-8 for each of the other types of plastic wrap.
Mom & Dad
Mrs. HauptmannMrs. Cunningham