Talk:High-density polyethylene

message: Hi.
Quite a lot of information is missing and should be added: chemical/mechanical/physical properties, structure, formation processing etc.
Kushnir11 (talk) 09:06, 24 January 2018 (UTC)
replies: text: mecanical??? On a vest? 2601:646:4100:7E60:1DC4:F848:FE08:29A (talk) 00:29, 28 September 2023 (UTC)

message: HDPE is made from ethylene but not directly from petroleum. Petroleum is cracked into ethylene among others. One should at least state the intermediate step of ethylene.... someone should definitely redo the introducing paragraph.  lg Phil --90.136.120.112 (talk) 21:37, 14 January 2013 (UTC)
thread_title: made from Petroleum

message: The article is about High-density polyethylene, but the actual density of the material in never quoted. The Polyethylene article quotes 0.941 g \times cm^{-3}  but without references. Godot (talk) 19:41, 29 June 2008 (UTC)
thread_title:  Actual density. 

message: Dear all, i m not a chemist but interested to know for my knowledge that when Polyethylene and Ethylene Glycol is produced, is there any normal loss i.e. if 100 input of catalyst and Ethane etc is inputted, do we get 100% of the output or is there any loss due to chemical reaction. I cannot find this in the description. 
please email me the reply on moid.raza@yahoo.com
Thanks for the information  —Preceding unsigned comment added by 62.150.68.5 (talk) 10:30, 18 September 2008 (UTC)
thread_title:  Normal loss in the chemcial process of producing Poly Ethylene 

message: There must be some chemical solvent that can join it.  —Preceding unsigned comment added by Ericg33 (talk • contribs) 01:42, 6 July 2009 (UTC)
replies: text: See polyethylene. Wizard191 (talk) 15:03, 6 July 2009 (UTC)
thread_title:  Any way to solvent Weld/glue? 

message: Never seen this order and it's incorrect English grammar. Maybe it's a French acronym? Polyetylene haute densite?  —Preceding unsigned comment added by 24.85.143.66 (talk) 14:01, 21 July 2010 (UTC)
thread_title:  PEHD? 

message: From Article:
"It takes 1.75 kilograms of petroleum (in terms of energy and raw materials) to make one kilogram of HDPE. HDPE is commonly recycled, and has the number "2" as its recycling symbol. In 2007, the global HDPE market reached a volume of more than 30 million tons"
"1.75 kilograms of petroleum (in terms of energy and raw materials) to make one kilogram of HDPE" Is this relatively a lot or a little?
"In 2007, the global HDPE market reached a volume of more than 30 million tons" Same question  — Preceding unsigned comment added by 70.181.109.130 (talk) 02:06, 9 January 2012 (UTC)
thread_title:  Context? 

message: Hello! This is a note to let the editors of this article know that :File:Hdpe pipe installation.jpg will be appearing as picture of the day on October 26, 2014. You can view and edit the POTD blurb at Template:POTD/2014-10-26. If this article needs any attention or maintenance, it would be preferable if that could be done before its appearance on the Main Page. Thanks! — Crisco 1492 (talk) 02:03, 7 October 2014 (UTC)
thread_title:  [[:File:Hdpe pipe installation.jpg]] to appear as POTD 

message: HDPE is sometimes called "alkathene" or "polythene" - are these worth mentioning?  (Just had to go hunting to find what "alkathene" means when someone used the term). e.g: http://www.level.org.nz/water/water-supply/system-layout-and-pipework/pipe-materials/ Alkathene seems to be a reasonably common name, at least here in New Zealand.
BevanFindlay (talk) 22:22, 5 March 2015 (UTC)
thread_title:  Alternative names? 

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thread_title:  External links modified 

message: To add to this article: does HDPE ever contain phthalates (or similar compounds), and, if so, do those phthalates (or similar compounds) leach out of the HDPE when in contact with liquids or foods? 173.88.246.138 (talk) 16:21, 22 December 2019 (UTC)
thread_title: To add to article

message: "HDPE is resistant to many different solvents, so it cannot be glued." Glues do not dissolve the surfaces they are joining; solvent cements do. Therefore, I don't think HDPE "cannot be glued" *because* of its resistance to solvents. SeanMon (talk) 17:05, 28 April 2022 (UTC)
thread_title:  solvent resistance vs. gluing 

message: and how does it respond to repeated heating and cooling (say from zero to about 100 degrees Fahrenheit?)tx 64.229.175.25 (talk) 20:50, 2 January 2023 (UTC)
replies: text: That depends greatly on what stabilisers have been added to it. Items can last for many years before failing. No one really knows how long full degradation takes. --Project Osprey (talk) 22:12, 2 January 2023 (UTC)
thread_title:  what is the life span of this plastic