Givat Posted June 11, 2006 Posted June 11, 2006 I posted in the random thread but no one answered (don't know if it's because people don;t know or just don;t see it) Listen guys, in my country we can't buy pure PVC from pyro shops in a reasonable price.So I looked for some factory who use PVC as raw material. One of the factories was happy to help me and sent me info on is PVC to see if this will be good for my use.The problem is that I don't sure if this is pure enogh or eve nhow pure is this PVC from the info they gave me - so I'm hoping maybe one of you guys can help me determine if this is PVC good for pyro. http://www.apcforum.net/files/060524-2.jpg (In order to see the file you need to right click it and "Save Target As...". after this change the name to "060524-2.pdf" and it will open with acrobat reader) thanking you in advance p.s.This PVC will cost me about 5-10$ a kilo, so if it's good for pyro maybe people should try to buy from factories too. This is more information on the PVC from the supplier:http://tyit.en.alibaba.com/product/5011683...ion_Grade_.html I realy need this PVC for colored stars and I have to buy 25 kilo sack. so it will be a waist of money if this pvc don;t worth nothing to me. please, if someone can help me determine if this PVC is good for pyro or not, please do. Thanks.
lacrima97 Posted June 13, 2006 Posted June 13, 2006 I guess, as one test, you could dissolve the pvc in methyl ethyl ketone, and hope that maybe some of the impurities weren't soluble in mek. If you saw anything in the liquid, you would know it had some impurities. It might not be a great idea, but at least its something I suppose.
al93535 Posted June 13, 2006 Posted June 13, 2006 I really feel for you guys who don't have access to pyro chem suppliers. I would think if they are using PVC it would be pretty pure. All you can really do is try it. Buy it and see if it works, if so, you have alot of PVC, if not, then you tried!!
Givat Posted June 13, 2006 Author Posted June 13, 2006 lacrima97, I don't got this PVC yet. I need to decide if I wan't to buy it or not.And i don't want to buy some shity PVC that need to be cleaned in some way. it will be a waste of money. al93535, if I'm buying it it will cost me 125$, couse I need to buy 25 kilo sack.So buying shity PVC for 125$ and throw it to the garbage afterwards isn't sound like a good option for me.
Mephistos Minion Posted June 13, 2006 Posted June 13, 2006 I was looking into doing the same thing, I found a company that use PVC and asked if I could buy some. When I told them what for they directed me to the company they get it off, and they wouldnt deal with me atall.
Givat Posted June 13, 2006 Author Posted June 13, 2006 I never said it's for pyro. I'm always using the "'it's for scholl project" excuse.
Pont Posted June 13, 2006 Posted June 13, 2006 You could always try asking for a small sample product to determine if it is of reuired purity for your "project". Tell them your projects is on thermoplastics and the affects different additives have on its properties so you require pure PVC as a control material.
lacrima97 Posted June 13, 2006 Posted June 13, 2006 lacrima97, I don't got this PVC yet. I need to decide if I wan't to buy it or not.And i don't want to buy some shity PVC that need to be cleaned in some way. it will be a waste of money. al93535, if I'm buying it it will cost me 125$, couse I need to buy 25 kilo sack.So buying shity PVC for 125$ and throw it to the garbage afterwards isn't sound like a good option for me. Hmm, I see. Well, to be on the serious side, most likely, its going to be pretty pure. I seriously doubt them selling something like that impure. Anyway, I believe if it is being used for pyro, most anything over 90% purity would have a good chance of working anyway.
aquaman Posted June 13, 2006 Posted June 13, 2006 Givat the PVC looks alright so you could probably chance it. If it doesn't work then you can always resell it on ebay and get your money back.
Givat Posted June 13, 2006 Author Posted June 13, 2006 If you will look in the information Doc. the factory sent me (http://tyit.en.alibaba.com/product/50116831/50555472/Plastic_Materials/PVC_Resin__Suspension_Grade_.html)It wrote the Bulk Density is 0.53gram/c"c, and in some MSDS files I saw the Density is around 1.4 gram/c"c. this is the main reason I 'm not sure how pure this pvc is.
Mumbles Posted June 13, 2006 Posted June 13, 2006 Density and bulk density are different. Density is just mass per volume of the solid. Bulk density is mass per volume of the relative space. This is hard to explain, let me use an example. Bulk density is more relevant in industrial settings. It is a better way to approximate storage space. Lets say you got some sand from the beach. Assume sand has a density of 10g/mL for the sake of example. This is the density of sand. Lets say you filled a 5L bucket with sand. The bucket wouldn't have 50kg of sand in it. Sand is granular. For bulk density you must also take into account air space. Lets say there is only 35kg of sand in the bucket. Sand would then have a bulk density of 7g/mL.
Givat Posted June 20, 2006 Author Posted June 20, 2006 Thanks guys, I bought today the 25 kilo sack and its look preaty pure, any mixture I tried worked. hope to upload some movies soon of red and green stars, maybe strobe too.
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