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A plastic bag, poly bag, or pouch is a type of container made of thin, flexible, plastic film, nonwoven fabric, or plastic textile. Plastic bags are used for containing and transporting goods such as foods, produce, powders, ice, magazines, chemicals, and waste. It is a common form of packaging . Most plastic bags are heat sealed at the seams ...
The replaceable plastic bags with a typical volume of 500 or 1000 liters make the container easy to clean and reuse, which is needed for use with food, as strict hygiene regulations must be observed. The space-saving intermediate bulk containers are used in the pharmaceutical, cosmetics and food industries.
The bag is supplied to the company which will fill it as an empty pre-made bag. The company filling the bag with its product generally removes the tap, fills the bag (with wine, juice or other liquid) and replaces the tap and then the bag is placed in the box.
A bread clip is a device used to hold plastic bags closed, such as those in which sliced bread is commonly packaged. They are also commonly called bread tags, bread tabs, bread ties, bread buckles, or bread-bag clips. By sealing a bag more securely than tying or folding over its open end, and thus providing a nearly hermetic seal, the contents ...
Petroleum geology is principally concerned with the evaluation of seven key elements in sedimentary basins : A structural trap, where a fault has juxtaposed a porous and permeable reservoir against an impermeable seal. Oil (shown in red) accumulates against the seal, to the depth of the base of the seal.
Cold welding was first recognized as a general materials phenomenon in the 1940s. It was then discovered that two clean, flat surfaces of similar metal would strongly adhere if brought into contact while in a vacuum (see Van der Waals force ). Newly [when?] discovered micro- [1] and nano-scale cold welding [2] has shown potential in nanofabrication processes.
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