toussaint ha scritto:
Il Neoprene non è altro che gomma e si sa quanto sia atermica la gomma, il Gore-tex è stato inventato nel 1976, il Mylar non è altro che volgare PET e tutti sanno quanto sia atermico (mettete una bottiglia d'acqua al sole e poi ci divertiamo), il Dacron non è altro che il vecchio Terital di nostra nonna.
E con questa monnezza si dovevano affrontare temperature variabili in un nanosecondo di 100, 150 gradi e oltre.
Ma quante minchiate uno è costretto a leggere...
edit: allora, era molto più avanzato il Domopak del LEM...
sia mai il tuo ego ne possa beneficiare
con il Mylar [ per toussaint "ao' le bottije de plastica ao' che se e metti de fora cor sollllllleone se squajano" ]
ci fanno anche....
Uses for boPET polyester films include, but are not limited to:
Flexible packaging and food contact application
Laminates containing metallized boPET foil (In technical language called printin or laminate web substrate) protect food against oxidation and aroma loss, achieving long shelf life. Examples are coffee "foil" packaging and pouches for convenience foods.
White boPET web substrate is used as lidding for dairy goods such as yogurt.
Clear boPET web substrate is used as lidding for fresh or frozen ready meals. Due to its excellent heat resistance, it can remain on the package during microwave or oven heating.
Laminated sheet metal (aluminum or steel) used in the manufacture of cans (bisphenol A-free alternative to lacquers)
Covering over paper
A clear overlay on a map, on which notations, additional data, or copied data, can be drawn without damaging the map
Metallized boPET is used as a mirror-like decorative surface on some book covers, T-shirts, and other flexible cloths.
Protective covering over buttons/pins/badges
The glossy top layer of a Polaroid SX-70 photographic print
As a backing for very fine sandpaper
boPET film is used in bagging comic books, in order to best protect them during storage from environmental conditions (moisture, heat, and cold) that would otherwise cause paper to slowly deteriorate over time. This material is used for archival quality storage of documents by the Library of Congress (specifically Mylar® type D) and several major library comic book research collections, including the Comic Art Collection at Michigan State University. While boPET is widely (and effectively) used in this archival sense, it is not immune to the effects of fire and heat and could potentially melt, depending on the intensity of the heat source, causing further damage to the encased item.
For protecting the spine of important documents, such as medical records.
An electrical insulating material
Insulation for houses and tents, reflecting thermal radiation
Five layers of metallized boPET film in NASA's spacesuits make them radiation resistant and keep astronauts warm.
Metallized boPET film "emergency blankets" conserve a shock victim's body heat.
As a thin strip to form an airtight seal between the control surfaces and adjacent structure of aircraft, especially gliders.
Light insulation for indoor gardening.
Wildland fire shelters.
Proximity (aluminized) suits used by AR-FF fire fighters for protection from the high amount of heat release from fuel fires.
Aluminized boPET films are no longer used as thermal and acoustic insulation in aircraft since they were found to have been a factor in the Swissair Flight 111 crash. The accident investigation showed that the aluminum layer prevents the film from self-extinguishing in a fire under the conditions in aircraft.
Solar, marine and aviation applications
Metallized boPET is intended to be used for solar sails as an alternative means of propulsion for spacecraft such as Cosmos 1
Metallized boPET solar curtains reflect sunlight and heat away from windows.
Aluminized, as an inexpensive solar eclipse viewer, although care must be taken, because invisible fissures can form in the metal film, reducing its effectiveness.
High performance sails for sailboats and hanggliders
Use boPET films as the back face of the PV modules in solar panels
Metallized boPET as a reflector material for solar cooking stoves
To bridge control surface gaps on sailplanes, reducing profile drag
Amateur and professional visual and telescopic solar filters. BoPET films are often annealed to a glass element to improve thermal conductivity, and guarantee the necessary flat surface needed for even telescopic solar observation. Manufacturers will typically utilise films with thicknesses of 280–500 micrometres (0.011–0.020 in), in order to give the films better resilience. 250-micrometre (0.0098 in) thickness films with a heavy aluminium coating are generally preferred for naked-eye Solar observation during eclipses.
Films in annular ring mounts on gas-tight cells, will readily deform into spherical mirrors. Photomultiplier cosmic-ray observatories often make use of these mirrors for inexpensive large (1.0 m and above), lightweight mirror surfaces for sky-sector low and medium energy cosmic ray research.
As a light diaphragm material separating gases in hypersonic shock and expansion tube facilities.
As a beamsplitter in Fourier transform infrared spectroscopy, typically with laser applications. Film thicknesses are often in the 500 micrometre range.
Coating around hematocrit tubes.
Insulating material for a cryocooler radiation shield.
As a window material to confine gas in detectors and targets in nuclear physics.
In CT scanners it acts as a physical barrier between the xray-tube, detector ring and the patient allowing negligible attenuation of the xray beam when active.
Spacecraft are insulated with a metallized BoPET film.
Electronic and acoustic applications
Carrier for flexible printed circuits.
Mylar coated aluminum, also known as a 'Foil Shield', is commonly found in ethernet and other multi-conductor cables.
boPET film is often used as the diaphragm material in electrostatic loudspeakers and electret microphones.
boPET film has been used in the production of banjo & drumheads since 1958 due to its durability and acoustical properties when stretched over the bearing edge of the drum. They are made in single- and double-ply versions, with each ply being 2–10 mils (0.051–0.25 mm) in thickness, with a transparent or opaque surface, originally used by the company Evans.
boPET film is used as the substrate in practically all magnetic recording tapes and floppy disks.
Metallized boPET film, along with other plastic films, is used as a dielectric in foil capacitors.
Clear boPET bags are used as packaging for audio media such as compact discs and vinyl records.
Clear and white boPET films are used as core layers and overlays in Smart Cards.
Before the widespread adoption of CAD, engineering plans or architectural drawings were plotted onto sheets of boPET film. The boPET sheets become legal documents from which copies or blueprints are made. boPET sheets are more durable and can withstand more handling than bond paper. This is no longer necessary, as traditional diazo "blueprint" duplication has fallen out of use.
Overhead transparency film for photocopiers or laser printers (boPET film withstands the high heat).
Route information signs, called rollsigns or destination blinds, displayed by public transport vehicles
For materials in kites
Covering glass to decrease probability of shattering
In theatre effects as confetti.
As the adhesive strip to attach the string to a teabag
One of the many materials used as windsavers or valves for valved harmonicas
On farmland, highly reflective aluminized PET film ribbons are tied to the plants to create shimmers from the sun for an effect similar to a scarecrow.
Protecting pinball machine playfields from wear
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