Polycarbonate Luggage

Here are some more information for Polycarbonate Luggage:

How to Make Your Air Travel Easier!

If you are a traveler, as I am, the Rimowa Salsa Multiwheel Trolley is a great investment for a piece of luggage. I have traveled a lot over the years, for business and pleasure. I originally traveled with soft cases, but with the way airlines handle luggage, I would end up having to replace them much too often. The corners would get damaged, the fabric would get torn or fray on the edges, wheels would break, I would have things missing from my bags, and I could go on and on.

After all of that, I decided to go to a hard case (mind you this has been years ago), the cases were heavy, the locks didn't always work, couldn't keep up with the keys, etc. I wish I had known about Rimowa Luggage back then.

Today, with all the airline security and weight limitations, we are forced to really look at the type of luggage we carry. This is why I really like the Rimowa Salsa Multiwheel Trolley. It is ultra-light weight, which is a huge plus with the weight limitations these days. I can actually carry more of my own items than I could with my old luggage.

Then there is the locking feature. The Rimowa Suitcase comes with a built in locking system, and it is a combination lock. Also has the TSA lock built right in. This way I can lock my luggage when I check in and not have to worry about things disappearing.

Another great thing I like about this luggage is its durability. The case is made of 100% polycarbonate and will actually "give" if put under a lot of pressure. However, once the pressure is released, it goes right back to its original shape.

Tired of being charged for your luggage being overweight, or being damaged by the baggage handlers? Make traveling easier, get the Rimowa Salsa Multiwheel Trolley!

If you travel a lot, you owe it yourself to check out the http://www.squidoo.com/Rimowa-Salsa-Multiwheel-Trolley.

About the Author

Hi,
The Holiday's are fast approaching and as we all tend to do, we wait til the last minute to do our shopping. Only to find out we can't find that special gift, it is nowhere to be found.

I have found some great gift ideas on Amazon that will help you with your Holiday shopping now. Not only will you get a great gift for your loved one, you will also save yourself time and money.

The Rimowa Salsa Multiwheel Trolley for the traveler on your list.

Thanks for visiting,

Miss Gift Ideas

what is the difference between polycarbonate & polypropylene?

I need help in buying luggage
if in the case of a suitcase, which one would be more durable?

Polycarbonate
Density 1220 kg/m3
Young's modulus(E) 2-2.2 GPa
Tensile strength(σt) 60-65 MPa
Elongation @ break 80-150%
notch test 20-35 kJ/m2
Glass temperature 150°C
Melting temperature 267°C* -
Vicat B<1> 145
heat transfer coefficient (λ) 0.21 W/m.K
linear expansion coefficient (α) 6.5 10-5 /K
Specific heat (c) 1.3 kJ/kg.K
Water absorption (ASTM) 0.16
Price 5-9 €/kg
# ↑ Deformation temperature at 10kN needle load
source: A.K. vam der Vegt & L.E. Govaert, Polymeren,
van keten tot kunstof, ISBN 90-407-2388-5
* Marchant RE, Wang I (1994). Physical and chemical
aspects of biomaterials used in humans. in ISBN 0849344328
Polycarbonates are a particular group of thermoplastics. They are easily worked, molded, and thermoformed; as such, these plastics are very widely used in modern manufacturing. They are called polycarbonates because they are polymers having functional groups linked together by carbonate groups (-O-CO-O-) in a long molecular chain.

The most common type of polycarbonate plastic is one made from Bisphenol A, in which groups from Bisphenol A are linked together by carbonate groups in a polymer chain. This polycarbonate is a very durable material, and can be laminated to make bullet-proof "glass", though “bullet-resistant” would be more accurate. The characteristics of polycarbonate are quite like those of polymethyl methacrylate (PMMA; acrylic), but polycarbonate is stronger and more expensive. This polymer is highly transparent to visible light and has better light transmission characteristics than many kinds of glass. CR-39 is a specific polycarbonate material with good optical and mechanical properties, frequently used for eyeglass lenses.

Polycarbonate has :

a density of 1.20 g/cm3
a use range from -100°C to +135°C
a melting point around 250°C
a refractive index equal to 1.585 ± 0.001
a light transmission index equal to 90% ± 1%
poor weathering in an ultraviolet (UV) light environment
Polycarbonate is becoming more common in housewares as well as laboratories and in industry. It is often used to create protective features, for example in banks as well as vandal-proof windows and lighting lenses for many buildings. Other products made from polycarbonate include sunglass/eyeglass lenses, compact discs, DVDs, and automotive headlamp lenses. It is the major component of one variety of Nalgene bottles. It is also used for animal enclosures and cages used in research.

LEXAN® is the registered trademark for polycarbonate plastic manufactured (from Bisphenol A) by General Electric. MERLON® is the registered trademark used by the Mobay Chemical Company. MAKROLON® is the registered trademark for polycarbonate from Bayer, which is also referred to as "macrolon". PANLITE® is the registered trademark for polycarbonate plastic manufactured from Teijin Chemical Limited, which is also the major producer for optical grade polycarbonate.

Polypropylene
Image:Polypropylene.jpg
Chemical name poly(1-methylethylene)
Synonyms Polypropylene; Polypropene; Polipropene 25 [USAN];
Propene polymers; Propylene polymers;
1-Propene homopolymer
Chemical formula (C3H6)x
Monomer Propylene (Propene)
CAS number 9003-07-0 (atactic)
25085-53-4 (isotactic)
26063-22-9 (syndiotactic)
Density Amorphous: 0.85 g/cm3

Crystalline: 0.95 g/cm3

Melting point 173 °C
Degradation point 286 °C
Disclaimer and references

Polypropylene lid of a Tic Tacs box, with a living hinge and the resin identification code under its flapPolypropylene or polypropene (PP) is a thermoplastic polymer, used in a wide variety of applications, including food packaging, textiles, laboratory equipment, loudspeakers, automotive components, and polymer banknotes. An addition polymer made from the monomer propylene, it is unusually resistant to many chemical solvents, bases and acids. Its resin identification code is .

[edit]
Chemical & physical properties
Most commercial polypropylene has a level of crystallinity intermediate between that of low density polyethylene (LDPE) and high density polyethylene (HDPE); its Young's modulus is also intermediate. Although it is less tough than LDPE, it is much less brittle than HDPE. This allows polypropylene to be used as a replacement for engineering plastics, such as ABS. Polypropylene has very good resistance to fatigue, so that most plastic living hinges, such as those on flip-top bottles, are made from this material. Very thin sheets of polypropylene are used as a dielectric within certain high performance pulse and low loss RF capacitors.

Polypropylene has a melting point of 320 degrees Fahrenheit (160 degrees Celsius). Food containers made from it will not melt in the dishwasher, and do not melt during industrial hot filling processes. For this reason, most plastic tubs for dairy products are polypropylene sealed with aluminium foil (both heat-resistant materials). After the product has cooled, the tub are often given lids of a cheaper (and less heat-resistant) material, such as LDPE or polystyrene. Such containers provide a good hands-on example of the difference in modulus, since the rubbery feeling of LDPE with respect to PP of the same thickness is readily apparent.

A rubbery PP can also be made by a specialized synthesis process, as discussed below. Unlike traditional rubber, it can be melted and recycled, making it a thermoplastic elastomer.

[edit]
Synthesis

Short segments of polypropylene, showing examples of isotactic (above) and syndiotactic (below) tacticity.An important concept in understanding the link between the structure of polypropylene and its properties is tacticity. The relative orientation of each methyl group (CH3 in the figure at left) relative to the methyl groups on neighboring monomers has a strong effect on the finished polymer's ability to form crystals, because each methyl group takes up space and constrains backbone bending.

Unlike most other vinyl polymers, useful polypropylene cannot be made by radical polymerization. The material that results from such a process has methyl groups arranged randomly, and so is called atactic. The lack of long-range order prevents any crystallinity in such a material, giving an amorphous material with very little strength and few redeeming qualities.

A Ziegler-Natta catalyst seems to be able to limit incoming monomers to a specific orientation, only adding them to the polymer chain if they face the right direction. Most commercially available polypropylene is made with titanium chloride catalysts, which produce mostly isotactic polypropylene (the upper chain in the figure above). With the methyl group consistenly on one side, such molecules tend to coil into a helical shape; these helices then line up next to one another to form the crystals that give commercial polypropylene its strength.

A ball-and-stick model of syndiotactic polypropylene.More precisely-engineered Kaminsky catalysts have been made, which offer a much greater level of control. Based on metallocene molecules, these catalysts use organic groups to control the monomers being added, so that a proper choice of catalyst can produce isotactic, syndiotactic, or atactic polypropylene, or even a combination of these. Aside from this qualitative control, they allow better quantitative control, with a much greater ratio of the desired tacticity than provious Ziegler-Natta techniques. They also produce higher molecular weights than traditional catalysts, which can further improve properties.

To produce a rubbery polypropylene, a catalyst can be made which yields isotactic polypropylene, but with the organic groups that influence tacticity held in place by a relatively weak bond. After the catalyst has produced a short length of polymer which is capable of crystallization, light of the proper frequency is used to break this weak bond, and remove the selectivity of the catalyst so that the remaining length of the chain is atactic. The result is a mostly amorphous material with small crystals embedded in it. Since each chain has one end in a crystal but most of its length in the soft, amorphous bulk, the crystalline regions serve the same purpose as vulcanization.

Test Drive: $2.2 million gets you this — a 2010 Bugatti Veyron Grand Sport
The toll booth attendant leaned out of her cage, looked the car over, and said, "The guy in front of you told me your car costs a million dollars."

Thanks for visiting!