تبلیغات
Polymer Science and Engineering - مطالب ابر Caps

Bottle Caps

Bottle caps are removed and discarded prior to the recycling of plastic or glass bottles and most refuse companies require you to remove the bottle cap before putting the bottle in your recycling box.

Plastic bottles are made from either polyethylene terephthalate (plastic #1) or high density polyethylene (plastic #2) but the plastic caps themselves can be made from high density polyethylene (plastic #2), low density polyethylene (plastic #4) or most often from polypropylene (plastic #5).

The polyethylene caps are the caps that you can deform easily if you squeeze or bend them with your fingers. These can be included with the plastic bottles in your recycling collection. An example of a polyethylene cap, is the flat cap commonly found on the top of plastic milk jugs. These caps push on to the top of the bottle rather than having a screw thread. Caps with a screw thread are usually made from polypropylene.

Polypropylene caps are much harder and more rigid than polyethylene caps, often with a screw on thread, and should not be included in your curbside recycling collection. If you try to bend these caps with your fingers the plastic will only bend a small amount. Polypropylene cap examples are detergent bottle caps, screw caps on soda, water bottles and toothpaste tubes or the flip top caps on shampoo bottles or other cosmetics products.

If you are not sure what type of plastic the cap is made from then place the cap in your general trash and recycle just the bottle.


reference : http://www.recyclingnj.com/



طبقه بندی: پلاستیک ها،
برچسب ها: Bottle Caps، Bottle، Caps، plastic، pp، polymer،

تاریخ : سه شنبه 19 بهمن 1395 | 10:25 ب.ظ | نویسنده : Arash Sadeghi | نظرات
لطفا از دیگر مطالب نیز دیدن فرمایید
.: Weblog Themes By M a h S k i n:.