Where did duct tape come from
There are several good tutorials online for making duct tape dress forms: Threads Magazine wikihow and even on Instructables be very careful of how you wrap your breasts! Duct tape is one of those tools that has so many uses. From removing warts to creating a carbon-dioxide scrubber to holding almost anything together, duct tapes uses are universal. I promise this is the last time Ill show you this least for a long time because it doesnt look quite like this anymore. After two and one half hours and about 25 worth of duct tape we have a sassy walled room. I wish I could say i massage had this grand idea to put tape on my walls from the. Most residential duct systems have numerous leaks that waste energy and lead to room-to-room pressure imbalances. Unfortunately, though, few building inspectors outside of California bother to enforce existing code requirements that residential duct seams be sealed with mastic or high-quality duct tape. 'butter is one of the best dietary sources of Vitamin a, and also contains vitamins e, k and. "2009 naacp image Awards: Bringing Black Star Power". 'i would recommend just mashing up avocado and using that as a spread instead.'. " dior Celebrates reopening of Madrid Store".
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Big-shot executive robert Stiles car is damaged when parked at the lodge. Stiles takes Red Green and the other lodge members anticellulite to court, forcing them to come up with duizeligheid 10,000 in damages in ten days - or else lose their beloved Possum Lodge. If youve been rolling your eyes at people who say duck tape adhesive, prepare some apologies. The durable cloth-backed tape first appeared during World War ii, when Johnson johnson developed an olive drab version as a handy way for American soldiers to waterproof their ammo cans. This again: a passenger snaps a picture of what seems to be duct tape affixed to some portion of an airplane, uploads it to facebook or wherever, and suddenly its a scandal. The picture above, showing tape over the flap fairing of a 737, was sent to me by a panicked reader a few years ago. Jun 03, 2009, convert scrap paper into a handy notepad with tear-away sheets using duct tape instead of specialty binding glue. What you ll need:Scrap paperCereal box or other. 64 Comments » Casey said, july 6, 2010 at 1:09. Ive always thought duct tape wallets looked tacky, but these are beautiful! Definitely worth the 45 minutes. Oct 13, 2009, put on the old shirt and have your friend wrap your torso in duct tape.
usually connected with a beaded metal sleeve or coupling. Here's the procedure for sealing flex-duct connections: The duct boot or coupling should be inserted at least 2 inches into the end of the duct. The fitting should be attached to the inner sleeve of the flex duct with a drawband (clamp) or #8 screws. Seal the joint between the inner section of duct and the fitting with high-quality duct tape or mastic. Seal the exterior vapor-barrier sleeve with a drawband and tape. Last weeks blog: Air-sealing Tapes and Gaskets.
Duct Tape, tear-Away scratch Pad - instructables
Yet mastic manufacturers, like duct tape manufacturers, generally require joints to be clean. You need to clean the halen joint with soap and water and a rag, says david Barnes from Hardcast. The same surface prep bistro is required no matter which sealing system is used. High quality duct tape — not mastic — should be used to seal holes in a furnace or air handler. As energy expert Bruce harley notes, mastic would render the cabinet unserviceable. Making good duct joints Here are some tips for creating durable, airtight duct seams: Duct seams need to be mechanically fastened (using sheet-metal screws for galvanized ducts and compression straps for flex duct) before being sealed. To secure seams in round galvanized ducts up to 12 inches in diameter, use at least three #8 screws per joint. To secure ducts over 12 inches in diameter, use five screws per joint. For securing joints in rectangular galvanized duct, use at least one screw per side. In most locations, mastic is preferable to tape. Mastic is messy, so wear old clothes when you apply. Install mastic as thick as a nickel.
Choosing between tape and mastic Since all duct-sealing products, including mastic and all types of duct tape, have disadvantages, deciding on the best duct-sealing strategy is tricky. Chuck murray, an Energy Specialist with the washington State University Energy Program, sees no reason to abandon mastic. I havent seen a tape yet that I like for use in a crawl space, says Murray. But we continue to monitor the situation. One of mastics chief advantages is that, unlike some tapes, it performs well without clamping. Yet mastic will not prevent a joint from opening. Mastic is not a mechanical fastener — you still need sheet-metal screws, and scrap metal or fiberglass drywall mesh for big holes, notes davis. You need to be sure that everything will hold together on its own merits. But, unlike with tapes, you dont have to worry about whether the surfaces are clean. Most installers dont bother to clean their joints before applying a sealant, and davis feels that mastic holds up better under the circumstances.
Nashua 558ca is basically the same product as Polyken 558CA. The tape consists of a butyl adhesive on a polyethylene-coated cloth backing; it has a ul 181 bfx listing for use with flex duct. Like opp tape manufacturers, butyl tape manufacturers want to differentiate their product from duct tape. We dont like to use the word tape, says david Barnes, a technical service representative at Hardcast. Were trying to overcome all of the perceptions associated with duct tape. Butyl tapes have fared well in the lawrence berkeley tests. The butyl tapes come with a metal foil backing as opposed to the cloth backing, says Walker. The cloth-backed tapes are the ones we see shrinking and failing. The butyl tapes have much more adhesive on them, so they will take longer to dry out and will stay flexible longer. In our testing weve done several different orientations over the years, and we havent found any failures in the butyl tape.
Duct Tape, on my plane!The backing can be manufactured in a variety of haarband colors, including a shiny metallized plastic finish. In new construction in California, were seeing more and more contractors using opp tape and a clamp to seal the core of the flex duct to a metal collar, says Walker. At least three manufacturers make ul 181b-fx listed polypropylene duct tape: Intertape polymer Group (manufacturer of AC698 tape shurtape technologies (manufacturer of dc-181 tape and Berry Plastics (manufacturer of FlexFix tape). Manufacturers of opp tape take pains to distinguish their product from the gray stuff. Although their dc-181 is a tape designed for use on ducts, mark hooks, a product manager at Shurtape technologies, insists that its not a duct tape. As long as joints sealed with opp tape are clamped, it will probably perform better than cloth duct tape. Butyl duct tape foil-backed butyl tape performs much better than cloth duct tape, although it isnt cheap. Hardcast, the manufacturer of Versi-Grip 181 duct mastic, sells several types of butyl duct tape; one of them, foil-Grip 1402, has a ul 181B listing. Foil-Grip 1402 consists of 12 mils of butyl adhesive (similar to the adhesive used in some flexible window flashings) with a 2-mil aluminum-foil top layer. Hardcast recommends foil-Grip butyl tape for use with galvanized steel duct, duct board, or flex duct. The manufacturer claims that foil-Grip 1402 is rugged enough to use outdoors or below grade. Berry Plastics sells a butyl-adhesive duct tape under two different brands (Nashua and Polyken).
In California, the duct-tape industry wanted the code to approve the use of ul 181-listed products, says Walker. But in our lab tests we have found that the ul 181 products fail. Just because it is outlet ul 181 listed does not mean that it performs any better than non-ul 181 listed products. The listed tapes may be of a higher quality — the mechanical properties of the tape are better — but they are not any better in terms of longevity at mask high temperature. Under those conditions the ul 181 tapes failed as well as the non-ul 181 tapes. More important than a tapes ul 181 label is the material category into which it falls. At least two new types of duct tape — butyl duct tape and oriented polypropylene (or opp) duct tape — may offer better performance than cloth duct tape, without the messiness of mastic. Oriented polypropylene tape, for sealing the inner core of flex duct to metal collars, as well as to repair the outer jacket of flex duct, many contractors have begun using oriented polypropylene (OPP) tape. Opp tape is a film-backed (as opposed to cloth-backed) tape resembling packing tape. (Housewrap tape is a type of opp tape.) The tape has a smooth backing and an acrylic adhesive, said to be more tenacious than rubber adhesive.
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When i ask them, Where are your ul blackheads products? They say, we dont sell any of those. They hold up a roll of cloth duct tape, and they say, this is what the guys use. Does ul 181 duct tape perform any better? In some areas, however, building inspectors insist that duct tapes sport a ul 181 label. Yet the ul 181B standard alone is no guarantee of long-term tape performance. The ul 181 listing is more of a smoke-and-flame listing, says Bob davis, an energy consultant for Ecotope in seattle. The testing doesnt have much to do with whether it will work as a duct sealant. At least four different types of tape have met the ul 181B standard, including some cloth-backed rubber-adhesive duct tapes, foil-backed tapes with acrylic adhesive, oriented polypropylene (OPP) tapes, and foil-backed butyl tapes. Unfortunately, according to tests performed at Lawrence berkeley national Laboratory by max Sherman and iain Walker, a ul 181 listing is no guarantee that a tape will last any longer than unlisted cloth duct tape.
The mastic vrouwen is spread over duct seams with a disposable paintbrush, putty knife, or your fingers. (If you spread mastic with your fingers, wear rubber gloves.). Gaps in ductwork or plenums that are over 1/16 or 1/8 inch wide can be sealed with mastic as long as the schoonheidsspecialiste gap is first reinforced with fiberglass mesh tape. If you're using mastic to seal seams in fiberglass board ductwork, use fiberglass mesh tape for all joints. Sources of mastic, manufacturers of mastic include: Hardcast (Versi-Grip 181 mastic McGill AirSeal (Uni-mastic 181 polymer Adhesives (AirSeal #22 rcd corporation 6 Mastic and, itw/tacc (Glenkote mastic). Among the distributors of AirSeal #22 mastic. All about duct tape, since common hardware-store duct tape — technically known as cloth-backed rubber-adhesive duct tape — fails quickly when used on ducts, most energy-conscious builders seal duct joints with mastic. Although mastic works well on galvanized steel ductwork, it has its disadvantages: it is messy to apply and awkward to use on clamped flex duct joints. According to section.3 of the International Energy conservation Code (iecc any tape used on duct board or flex duct must be labeled in accordance with ul 181A or 181B. In most regions of the. S., however, local inspectors have little or no interest in the leakiness of residential ducts, and duct tape labels are rarely checked for ul compliance. Ive been to wholesale distributors in Ohio, and I dont see them displaying anything with ul markings says Mark pulawski, former cloth tape market manager for Intertape polymer Group, a duct tape manufacturer in West Bradenton, Florida.
Is It Duck, tape or, duct Tape?
Most residential duct systems have numerous leaks that mökki waste energy and lead to room-to-room pressure imbalances. Unfortunately, though, few building inspectors outside of California bother to enforce existing code requirements that residential duct seams be sealed with mastic or high-quality duct tape. Most model codes, including the, international Residential Code (IRC), include duct tightness provisions: The 2006 irc section N1103.2.2 requires that Ducts, air handlers, filter boxes and building cavities used as ducts shall be sealed, while irc section M1601.3.1 requires that joints of duct systems shall. Hardware-store duct tape is not an approved tape. International Energy conservation Code (iecc international Energy conservation Code.) requires that All ducts, air handlers, filter boxes, and building cavities used as ducts shall be sealed. To learn how to test residential duct systems for leaks, see. All about mastic, most energy-conscious builders seal duct joints with mastic. Mastic is a gooey, non-hardening material with a consistency between mayonnaise and smooth peanut butter. Duct joints should always be secured with #8 sheet-metal screws before seams are sealed with mastic. Sealing duct seams is messy work, so wear old clothes.