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Question:

What's the difference between nylon and lycra?

Is there such a fabric made 100% of lycra? If so, where to find it?

Answer:

Lycra is a long chain polymer fiber that -while elastic and resilient -is far too fragile to be made into a fabricIt is more commonly called spandex both spandex and lycra are trademark names for the same thingElastane is another brand nameIn the business we say spandex as a generic term for all the different brand names of the same fiberIt shines when blended with other fibers, giving the resulting fabric stretch and flexibilityEven when in blends as low as 2% spandex the fabric has flexibility, shape retention and comfortNylon is also a polymer synthetic, but it's structure is different, resembling silk from a silkwormIt is strong and fine and can be made into micro fine yarnsWhen woven the fabric is tough and windproof, which is why it is made into parachutesWhen knit it become elastic and shinyWhen nylon is combined with spandex you get a soft, supple, stretchy flexible fabric that has come to be called spandex even though it is in reality a blend of nylon and spandexIt is suitable for sports, dance and athletic wear because of it's stretchiness, it's comfort and shiny surfaceNylon for strength and durability, spandex for stretch and flexibility You will never ever find a fabric that is truly 100% spandexIt would be impossible to knit or weave, it would fall apart the second you tried to cut it and it would be impossible to sew together as the sewing thread would shred the fabricWearing would be impossible, any abrasion or rubbing together will cause the fabric to fall apartIt needs to be blended to be made into fabricCommon blends include rayon spandex, cotton spandex, nylon spandex, polyester spandex and a new super stretch silk spandex woven into a shiny satin fabricEdit: I get mine from a place called King Textiles and also from designer fabric outlet AKA orange bag store in Toronto, places that sell to designer studiosNeither have websites.
I just had cellulose blow in my atticIt seems pretty good but there is a TON of dust up there nowA lot of people don't like cellulose because it settles so much and holds water( from what I have read on here)Other than the dust I have not had a problem with it.
better is a tough one cellulose you can get a higher r- value with less volume cellulose is recycles newspaper and is less hazardous to install it also has borax added to deter pests and is blown in attics sprayed on walls or used to fill existing walls that weren't previously insulated Fiberglass is typically rolled into attics and can be difficult to fill all gaps much more is needed at a fairly high costitchy and irritating mice love it Insule-safe 3 is a blown in fiberglass insulation comparable to cellulose although I still find it irritating it is not as bad as the pink stuff more depth is needed to achieve a comparable r- value and I believe (not sure) about 20% more expensive that cellulose
fiberglass would be my first choice, it has good sound stopping qualities,and because of the air entrapment good heat transfer stoppage, plus very important, fire retardant capabilitiesDo wear a mask when using it to prevent inhaling the fine glass fibers that are air born when disturbing it.

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