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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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#1
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![]() i just saw a commercial for Glad, "Touch & Seal", it reminded me of 40yr old commercials for SaranWrap, you remember - turn the bowl upside down? now i understand that you cannot buy any product like the orig., at least not imhe(experience), but now i wonder why we are being sold "new" forty year old technology? was there a patent issue? just in time for the Holidays, --Loren |
#2
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I gave up on all those wimpy simi-cling-wraps. I took a piece of
bandsaw blade and made an under-cabinet dispenser for a roll of 80 gauge pallet wrap. Now THAT's cling wrap and a lot cheaper than Glad or SaranWrap. Loren Coe wrote: i just saw a commercial for Glad, "Touch & Seal", it reminded me of 40yr old commercials for SaranWrap, you remember - turn the bowl upside down? now i understand that you cannot buy any product like the orig., at least not imhe(experience), but now i wonder why we are being sold "new" forty year old technology? was there a patent issue? just in time for the Holidays, --Loren -- Glenn Ashmore I'm building a 45' cutter in strip/composite. Watch my progress (or lack there of) at: http://www.rutuonline.com Shameless Commercial Division: http://www.spade-anchor-us.com |
#3
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I also noticed that as of late, all the food cling wraps have been
really crummy. The original Saran wrap is made of a patented film product from Dow-Corning. This stuff is the extremely tenaciously clingy wrap used in commercial packaging applications, think about pre-cut chicken pieces, and pallet wrap. The knockoffs use PVC, which is nowhere nearly as clingy but isnt patented either. -Dan In article N_sFb.421826$Dw6.1302536@attbi_s02, Loren Coe wrote: i just saw a commercial for Glad, "Touch & Seal", it reminded me of 40yr old commercials for SaranWrap, you remember - turn the bowl upside down? now i understand that you cannot buy any product like the orig., at least not imhe(experience), but now i wonder why we are being sold "new" forty year old technology? was there a patent issue? just in time for the Holidays, --Loren ----== Posted via Newsfeed.Com - Unlimited-Uncensored-Secure Usenet News==---- http://www.newsfeed.com The #1 Newsgroup Service in the World! 100,000 Newsgroups ---= 19 East/West-Coast Specialized Servers - Total Privacy via Encryption =--- |
#4
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Daniel Abranko wrote:
I also noticed that as of late, all the food cling wraps have been really crummy. The original Saran wrap is made of a patented film product from Dow-Corning. This stuff is the extremely tenaciously clingy wrap used in commercial packaging applications, think about pre-cut chicken pieces, and pallet wrap. The knockoffs use PVC, which is nowhere nearly as clingy but isnt patented either. -Dan Dan Stick it in the fridge and it will stick like crazy . Ken Cutt |
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On Mon, 22 Dec 2003 03:21:59 -0500, Daniel Abranko
wrote: I also noticed that as of late, all the food cling wraps have been really crummy. The original Saran wrap is made of a patented film product from Dow-Corning. This stuff is the extremely tenaciously clingy wrap used in commercial packaging applications, think about pre-cut chicken pieces, and pallet wrap. The knockoffs use PVC, which is nowhere nearly as clingy but isnt patented either. SaranWrap is made by Dow, not Dow-Corning (which makes mostly silicone products like fake tits and Silicone-Seal). D-C is or was a joint venture between Dow Chemical and Corning Glass (maker of silicon products like -- well, like glass). Distinguish between silicone and silicon, something that all news media seem unable to manage, but well within the capabilities of metalworkers. I don't think pallet wrap is Saran. Saran is pretty expensive for that. SaranWrap is made from Saran film (a plastic made by Dow Chemical Co.) and is fundamentally different from all other kitchen wraps in that it presents a MUCH higher resistance to the passage of odor molecules -- a difference I seem to be unable to convey to my wife. It doesn't cling quite as easily as some of the other kitchen wraps; it is quite a bit thicker. You really have to stretch it a bit to get it to cling. Sideways across the far side of the bowl, then spread and pull, simultaneously, over the near side. They make it by extruding Saran through an annular die and inflating the resulting tube to about 2 feet in diameter as it hardens, then flattened and wound onto big rolls. Then it's slit into three doubled strips and rewound onto six large 1 foot wide rolls before being rewound a second time onto the familiar cardboard tubes. (I did the rewind from wide rolls to narrow for one summer job.) -- --Pete "Peter W. Meek" "My dad worked for Dow since shortly after WWII" |
#6
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Saran is still on the market.
Peter Meek has a lot of good info in his post. I will just add that Saran is PVDC poly vinylidene Di Chloride. This material has one of the lowest Oxygen transmission rates of all plastics. The other good one is EVOH but it stops working when it gets wet. but I digress. All this means is that Saran does a much better job of keeping food fresh than Polyethylene or PVC wraps. PE is great for water transmission but it does squat for Oxygen transmission. For those who want to pursue further self study, use the search engine of choice with these two terms WVTR and O2TR Erich ah the things you learn that they don't teach in schools "Loren Coe" wrote in message news:N_sFb.421826$Dw6.1302536@attbi_s02... i just saw a commercial for Glad, "Touch & Seal", it reminded me of 40yr old commercials for SaranWrap, you remember - turn the bowl upside down? now i understand that you cannot buy any product like the orig., at least not imhe(experience), but now i wonder why we are being sold "new" forty year old technology? was there a patent issue? just in time for the Holidays, --Loren |
#7
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Glenn Ashmore wrote in message news:%xtFb.9668$JD6.2012@lakeread04...
I gave up on all those wimpy simi-cling-wraps. I took a piece of bandsaw blade and made an under-cabinet dispenser for a roll of 80 gauge pallet wrap. Now THAT's cling wrap and a lot cheaper than Glad or SaranWrap. I wonder if they changed the food-grade wraps out of concern for components of the plastic - or some surfacing agent - leaching into the food. Chris |
#8
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On Mon, 22 Dec 2003 08:56:17 -0800, Chris Stratton wrote:
Glenn Ashmore wrote in message news:%xtFb.9668$JD6.2012@lakeread04... I gave up on all those wimpy simi-cling-wraps. I took a piece of bandsaw blade and made an under-cabinet dispenser for a roll of 80 gauge pallet wrap. Now THAT's cling wrap and a lot cheaper than Glad or SaranWrap. I wonder if they changed the food-grade wraps out of concern for components of the plastic - or some surfacing agent - leaching into the food. That was the reason in the UK -- Neil Delete delete to reply by email |
#9
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My understanding is that PVDC is much better for water vapor
transmission rates than PE. Dan "Kathy and Erich Coiner" wrote in message news:K6FFb.193 Peter Meek has a lot of good info in his post. I will just add that Saran is PVDC poly vinylidene Di Chloride. This material has one of the lowest Oxygen transmission rates of all plastics. All this means is that Saran does a much better job of keeping food fresh than Polyethylene or PVC wraps. PE is great for water transmission but it does squat for Oxygen transmission. For those who want to pursue further self study, use the search engine of choice with these two terms WVTR and O2TR Erich ah the things you learn that they don't teach in schools |
#10
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In article , Neil Ellwood wrote:
On Mon, 22 Dec 2003 08:56:17 -0800, Chris Stratton wrote: Glenn Ashmore wrote in message news:%xtFb.9668$JD6.2012@lakeread04... I gave up on all those wimpy simi-cling-wraps. I took a piece of bandsaw blade and made an under-cabinet dispenser for a roll of 80 gauge pallet wrap. Now THAT's cling wrap and a lot cheaper than Glad or SaranWrap. I wonder if they changed the food-grade wraps out of concern for components of the plastic - or some surfacing agent - leaching into the food. That was the reason in the UK interesting, my Glad wrap box states: "Microwave Safe". this apparently is not true for Saran Wrap(?), anyone? this url has a brief discourse on the issue: http://urbanlegends.about.com/librar...ve-dioxin2.htm another url states: ....85% of all pvc wrap is used between two protective layers for food service... a couple of decades ago, Sac Peak Observatory decided to layoff the kitchen staff and install a few Microwave Ovens and offer frozen food or just bring your own. the slow ovens worked better if you emtied the tv dinner into a sytrofoam plate (provided) which promptly melted if you over did it (nuked it). i was amazed that none of these folks, scientists included, thru out a plate because there was plastic melted onto/into the food. maybe they knew that if it wasn't SaranWrap, it was edible. grin --Loren |
#11
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Loren Coe wrote:
interesting, my Glad wrap box states: "Microwave Safe". this apparently is not true for Saran Wrap(?), anyone? Do you have some reason to think it's not true for Saran Wrap? The box I bought a few weeks ago ("Saran - The Original Premium Wrap") claims to be "Best food protection. Best for freezer use. Best for microwave use." Their number, in case you want to follow up, is 800-428-4795. Bert |
#12
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On Mon, 22 Dec 2003 16:39:06 GMT, "Kathy and Erich Coiner"
wrote: Saran is still on the market. Peter Meek has a lot of good info in his post. I will just add that Saran is PVDC poly vinylidene Di Chloride. That may explain why it clings so well when stretched a bit. If PVDC is stretched enough that the polymer chains are more or less aligned, it because piezoelectric; deformation creates an electrostatic potential in the material. If the charge has nowhere to leak off, it becomes the static electric equivalent of a permanent magnet. I have noticed that meats double-wrapped in saran do NOT freezer burn for as long as I'd want to keep frozen meat -- several months! |
#13
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On Mon, 22 Dec 2003 16:39:06 GMT, "Kathy and Erich Coiner"
wrote: All this means is that Saran does a much better job of keeping food fresh than Polyethylene or PVC wraps. Makes better X ray lasers too... -- Klein bottle for rent. Apply within. |
#14
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On Wed, 24 Dec 2003 01:30:49 +0000, Andy Dingley
wrote: Makes better X ray lasers too... Didn't realise plastics were used in Xray lasers... Live and learn. Mark Rand RTFM |
#15
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Mark Rand wrote:
On Wed, 24 Dec 2003 01:30:49 +0000, Andy Dingley wrote: Makes better X ray lasers too... Didn't realise plastics were used in Xray lasers... Live and learn. Xray lasers don't apparently work, unfortunately. (well, the bomb-pumped ones) |
#16
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On Wed, 24 Dec 2003 21:08:28 +0000, Mark Rand
wrote: Didn't realise plastics were used in Xray lasers... Live and learn. Read the original Hagelstein paper. Saran was a substrate used to deposit metal films on (which did the interesting bit). If you were computer modelling the plasmas (as I was) you had to model both components. Of course, the Brits had no idea what this bizarre American wonder-material "Saran" that Los Alamos had cooked up could possiby be - we thought it was an allotrope of krypotonite. Then you learn that it's just cling film Then you learn that it's _not_ just cling film. -- Die Gotterspammerung - Junkmail of the Gods |
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