Are these plastic caps made of a phenolic resin? Or are they injection molded? Penolic resin are thermosetting materials - you cannot re-melt it.
1350911
The question about the caps is irrelevant for its application, because there is a semi-transparent liner embedded in each cap that comes in contact with the glass bottle throat, thereby creating the seal. I understand from something I recall reading that material does not contain BPA (Bisphenol A) which is believed to cause cancer. The black cap material itself is rigid and sturdy, and holds the semi-transparent liner. I will say that I do not believe these caps - or the glass bottles they stop - are intended for intense heat. Therefore, when you say "Penolic resin are thermosetting materials - you cannot re-melt it," it's a puzzling question in the context of the represented intended use of these caps. The question about the caps is irrelevant for its application, because there is a semi-transparent liner embedded in each cap that comes in contact with the glass bottle throat, thereby creating the seal. I understand from something I recall reading that material does not contain BPA (Bisphenol A) which is believed to cause cancer. The black cap material itself is rigid and sturdy, and holds the semi-transparent liner. I will say that I do not believe these caps - or the glass bottles they stop - are intended for intense heat. Therefore, when you say "Penolic resin are thermosetting... » Read More The question about the caps is irrelevant for its application, because there is a semi-transparent liner embedded in each cap that comes in contact with the glass bottle throat, thereby creating the seal. I understand from something I recall reading that material does not contain BPA (Bisphenol A) which is believed to cause cancer. The black cap material itself is rigid and sturdy, and holds the semi-transparent liner. I will say that I do not believe these caps - or the glass bottles they stop - are intended for intense heat. Therefore, when you say "Penolic resin are thermosetting materials - you cannot re-melt it," it's a puzzling question in the context of the represented intended use of these caps. « Show Less
1350912
Who the hell would know the answer to this question?!? It's plastic, I can say, and much better than the cheap metal (tin?) caps that usually come with a growler. Seal is much tighter and won't bend or rust over time.
1350913
If purchased from Homebrewstuff, the caps are black phenolic lid with a polycone liner. The polycone liner is a conical shaped liner made of an oil-resistant plastic. This lid is perfect for chemicals, solvents, oils, essential oils, alcohol, cleaners.
1063484
Hi,Both makers are made of a very sturdy hard plastic. Hope this helps. :>}
426291
I have used this on plastic pieces to make copies for lost/broken piece and it worked well. Now pouring in a plastic resin to make a part will not work if the plastic curing process is high head - like most. That will melt/distort the material as it is flexible at 160 degrees F. If making a copy with plastic parts I would recommend a silicone mold. If using something like green stuff - this would work well.
53248
I would say these are made of a harder/cheaper plastic material rather than a polymer clay. They can be cut quite thin (I let them sit in the sun for a bit) but I don't think you could really dent or manipulate them and then re-bake them into something else, partly because they are really tiny. They are however cheaper enough to try and see what happens. Good luck!
676053
I'm not sure about the exact type of plastic used in this diffuser. But here is some information from the DoTerra website: Plastics designed specifically for use with essential oils (caps, diffusers, orifices, etc.) are made of a very high quality plastic that have stronger bonds and longer chain lengths that are not broken up by essential oils called HDPE. HDPE plastics will not be affected by essential oils.
399743
Somebody else asked me the same question so I checked them out. They are too hard, firm and don't bend to be plastic in my opinion.Good luck,PM
1041143
NEW INFORMATION. I wrote directly to Libbey Glass and asked the question. Here is the response I got pasted from their reply: "Thank you for contacting Libbey glass. The material is BPA free. It is a polyethylene material." I can believe this; the material behaves like polyethylene of which there are many versions, and polyethylene is used in many medical implanted devices as well as a great deal of hospital equipment, e.g. IV bags and tubes and also in public water supplies. It's okay. This is my previous comment: The plastic parts are definitely NOT silicone. I've not yet been able to determine for certain what they are. I'm intrigued by Erika's comment suggesting there are two versions of the jar, one of which may have a silicone seal. The ones I received from Amazon do not have silicone seals, but polyethylene is perfectly safe in my opinion.
532160
They are made out of polystyrene. Contact growerssupplycompany.com. They are the manufacturers and I would hope they would be willing and able to answer your questions. Happy growing.
2010212
I think it depends mostly on what you're using them for. I made bracelets with these and the domes gave it a really clean, more professional look. I think you could definitely use resin without the domes but I've never personally tried it.
1852048
I would say it's some type of molded resin. doesn't fell like plastic, has a good texture in my opinion.
662672
Probably some sort of polymer, might be clay though... definitely not plastic.
2232725
Open the hood of your car. All that black plastic? Glass filled nylon. PA66GF35. Everything is made of it. It's good stuff. Don't worry.
1369383
When I ordered a smaller set version because I needed some more, I remember that the company on the package was Chinaglaze. Other than that information, I'm not really sure. The caps are plastic and I don't think they would sustain in high temperatures.
1833446
It might be resin but I think it's plastic. Surprised that the type it's made out of isn't listed on here.
700842
It is made from a phenolic, very durable plastic material, I have this one and it's great.
1396180
I believe they are molded. But it's in the camper closed up for winter, so I can't garauntee.
1422441
There are seven classes of plastics. Types 1 (PET), 2 (HDPE), 4 (LDPE), 5 (polypropylene), and 6 (polystyrene) do not use bisphenol A. Type 7 is the catch-all "other" class, and some type 7 plastics, such as polycarbonate (sometimes identified with the letters "PC" near the recycling symbol) and epoxy resins, are made from bisphenol A monomer. When such plastics are exposed to hot liquids, bisphenol A leaches out 55 times faster than it does under normal conditions, at up to 32 ng/hour.*Scientific American February 19, 2008 article by David BielloThis doesn't really answer the original question. I might be concerned about the clear, hard plastics- found in these steamers for example, but not other kinds of plastics. There are seven classes of plastics. Types 1 (PET), 2 (HDPE), 4 (LDPE), 5 (polypropylene), and 6 (polystyrene) do not use bisphenol A. Type 7 is the catch-all "other" class, and some type 7 plastics, such as polycarbonate (sometimes identified with the letters "PC" near the recycling symbol) and epoxy resins, are made from bisphenol A monomer. When such plastics are exposed to hot liquids, bisphenol A leaches out 55 times faster than it does under normal conditions, at up to 32 ng/hour.*Scientific American February 19, 2008 article by David BielloThis doesn't... » Read More There are seven classes of plastics. Types 1 (PET), 2 (HDPE), 4 (LDPE), 5 (polypropylene), and 6 (polystyrene) do not use bisphenol A. Type 7 is the catch-all "other" class, and some type 7 plastics, such as polycarbonate (sometimes identified with the letters "PC" near the recycling symbol) and epoxy resins, are made from bisphenol A monomer. When such plastics are exposed to hot liquids, bisphenol A leaches out 55 times faster than it does under normal conditions, at up to 32 ng/hour.*Scientific American February 19, 2008 article by David BielloThis doesn't really answer the original question. I might be concerned about the clear, hard plastics- found in these steamers for example, but not other kinds of plastics. « Show Less