BLN
This was a help I also have a need for the symbols such as ">POM<" that sum of my customers ask for on their products. I dont know the origin or name of this type of marking but have been asked to use them. I would like more info on this type so I might catch a mistake before I engrave the tool with the wrong markings, this has happend in the past to me.
I think the referenced website covers all the recycling symbols. We require that any rubber part be marked to SAE J2332 (MARKING OF RUBBER PARTS), again this is for "rubber" products, not plastics. The >POM< that you call out is in the same format as SAE J2332, but I'm not familiar with POM. The SAE standard also references the following ISO standards:
ISO 1629—Rubber and Latices—Nomenclature
ISO 1043-1—Plastics—Symbols—Part 1: Basic polymers and their special characteristics
ISO 1043-2—Plastics—Symbols—Part 2: Fillers and reinforcing materials
ISO 11469—Plastics—Generic identification and marking of plastic products
ISO 1629 supposedly contains the standard symbols for terms relating to rubber.
The <POM> format does refer to ISO 1043-1: 1987, "Symbols for plastic and Rubber". (BS3502 in the UK)
Where the habit of using the greater than and less than signs came from I do not know, the standards don't call for them. I suspect it comes from the older DIN standard.
