It
seems that there is always a need to open and close things repeatedly and
quickly. The heavy duty zippers does a very good job of that, but there are other
inventions designed to do the same thing.
Have
you ever packed a lunch to take on a trip? You may have used a Ziploc bag to
keep your sandwich fresh. Ziploc bags are made of plastic and have male and
female sides that lock together. Originally, Ziploc bags had only one seal, but
now many have two. The seals are very tight and can be waterproof. Try doing
that with buttons!
Another
invention you are probably familiar with is Velcro. Velcro is usually made from
nylon and has two sides. One side is called the hook side (it looks like a
forest made up of tiny mushrooms). The other side is called the loop side (it
looks like chain stitching made from nylon threads). When you press the two
sides together, the hooks and the loops lock together to fasten the material.
If
you want to know more about gold metal zipper and zipper puller, please contact with
UZIP ZIPPER.
Jessica
Kung
Skype:
tdysho
Wechat:
jessicakung1017
Whats:
8613631458295
Email:
uzipga@hotmail.com
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