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2. Packaging gas - Wikipedia

   en.wikipedia.org/wiki/Packaging_gas

   Packets of dry snack foods, such as this packet of Wotsits, commonly use nitrogen as a packaging gas to keep the contents from going stale or damp prior to being opened.. A packaging gas is used to pack sensitive materials such as food into a modified atmosphere environment.

3. Carbon-fiber reinforced polymer - Wikipedia

   en.wikipedia.org/wiki/Carbon-fiber_reinforced...

   Archery: carbon fiber arrows and bolts, stock (for crossbows) and riser (for vertical bows), and rail. As a filament for the 3D fused deposition modeling printing process, [45] carbon fiber-reinforced plastic (polyamide-carbon filament) is used for the production of sturdy but lightweight tools and parts due to its high strength and tear length ...

4. Recycling codes - Wikipedia

   en.wikipedia.org/wiki/Recycling_codes

   Recycling codes on products. Recycling codes are used to identify the materials out of which the item is made, to facilitate easier recycling process.The presence on an item of a recycling code, a chasing arrows logo, or a resin code, is not an automatic indicator that a material is recyclable; it is an explanation of what the item is made of.

5. Metallised film - Wikipedia

   en.wikipedia.org/wiki/Metallised_film

   Metallised nylon and polyethylene are used in the meat export market. The controlled permeation extends shelf life. Metallised films are used as a susceptor for cooking in microwave ovens. [5] An example is a microwave popcorn bag.

6. Vertical form fill sealing machine - Wikipedia

   en.wikipedia.org/wiki/Vertical_form_fill_sealing...

   The typical machine is loaded with a continuous flat roll of plastic film, which has usually had labeling and artwork applied. Plastic is the most commonly used packaging material in the food industry, but the technology can be used to form continuous metallized foil/film, paper, and fabric product containers by changing the edge sealing/seaming methods.

7. Low-density polyethylene - Wikipedia

   en.wikipedia.org/wiki/Low-density_polyethylene

   LDPE has SPI resin ID code 4 Schematic of LDPE branching structure. Low-density polyethylene (LDPE) is a thermoplastic made from the monomer ethylene.It was the first grade of polyethylene, produced in 1933 by John C. Swallow and M.W Perrin who were working for Imperial Chemical Industries (ICI) using a high pressure process via free radical polymerization. [1]

8. Filler (materials) - Wikipedia

   en.wikipedia.org/wiki/Filler_(materials)

   The elastic modulus (Young's modulus) of a filled polymer can be found using the equation below: E = E 0 (1 + 2.5Φ + 14.1Φ 2) [13] where: E 0 = Modulus of unfilled resin or binder Φ = Filler concentration. Polymers with smaller additions of filler follow this equation closely. In general addition of filler materials will increase the modulus.

9. Linear low-density polyethylene - Wikipedia

   en.wikipedia.org/wiki/Linear_low-density...

   LLDPE has penetrated almost all traditional markets for polyethylene; it is used for plastic bags and sheets (where it allows using lower thickness than comparable LDPE), plastic wrap, stretch wrap, pouches, toys, covers, lids, pipes, buckets and containers, covering of cables, geomembranes, [2] and mainly flexible tubing. It is also common to ...