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What are some examples of self-seal plastic items that were introduced in the US in 1957?
Well, an internet search for "1957 self sealing" reveals many product patents including but not limited to:
plastic wrap (saran wrap was invented in the late 1940s though)
self sealing plastic bags
self sealing washers
self sealing container lids (such as those used for inks)
The term, "self seal" suggests that the material sticks to itself. Zip-lock types of bags and tupperware require mechanical manipulation and therefore do not seal themselves.
Also, many products containing latex exhibit this ability (self vulcanization?) and may contain/be converted to plastic (such as rubber but the sealing properties come from the latex, not the plastic.) That being said, a self sealing vehicle tire or the "stopper" on a phlebotomists (sp) test-tube could be considered plastic items.
This question seems to require a very specific answer derived from specific material. If this is a test or homework question I would suggest reading the material that the instructor has provided.
What else can I help you with?
What are some examples of translucent items?
Examples of translucent items include frosted glass, wax paper, and certain plastics like shower curtains or plastic bottles. These materials allow light to pass through, although they may not be completely transparent.
What are some examples of basic materials?
Some examples of basic materials include wood, steel, concrete, plastic, and glass. These materials are commonly used in construction, manufacturing, and everyday household items.
Can you microwave 5 plastic items safely"?
No, it is not safe to microwave 5 plastic items at once as it can cause the plastic to melt or release harmful chemicals into your food. It is recommended to only microwave plastic items that are labeled as microwave-safe.
What was cotton introduced?
what items have been inserted into the rectum
Why are recycling symbols put on plastic items?
There are several different kinds of plastic that need to be recycled separately. Labeling plastic products with a number makes it easier to sort the recycling items so that only compatible items are recycled together.
What items can melt and then solidify?
Items like chocolate, butter, and wax can melt when heated and then solidify again when cooled. Other examples include metal alloys, plastic, and glass, which can also undergo melting and solidification processes with changes in temperature.
How and why were the pests introduced?
Most pests are introduced on items. Locating the where is difficult, but the pest itself can provide clues.
What does the word 'combustible' refer to?
The word combustible means that an object is capable of catching fire and burning. Examples of combustible items are paper, plastic cups, and everything that's made out of wood.
What are some examples of recyclable household items that can be disposed of in an environmentally friendly way?
Some examples of recyclable household items that can be disposed of in an environmentally friendly way include paper, cardboard, glass bottles and jars, aluminum cans, plastic containers, and certain types of electronics. These items can be recycled at designated recycling centers or through curbside recycling programs to reduce waste and protect the environment.
What items are made out of plastic?
Are you actually special needs.
Can examples be given to show that plastics are noncorrosive in nature?
When we go to buy any food item we generally use to carry them in plastic as plasctic do not reacts with food items as well as air and water.
What are examples of pH 8 items?
Examples of pH 8 items include sea water, baking soda solution, and eggs.
