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| equipment:storage [2019/06/07 18:17] – [Foams] mcmaster | equipment:storage [2019/07/05 18:53] – mcmaster | ||
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| - | https:// | + | |
| - | * Too low density to be useful | + | < |
| - | * Open cell | + | depends on whether you want your foam to turn to goo or powder. personally i prefer goo |
| - | * Density: | + | powder is open cell foam, it works as an abrasive too |
| - | * Tensile Strength (PSI): 13 | + | goo is closed cell foam, which is oddly slick |
| + | after 20 years the foams disintegrate | ||
| + | open cell foam turns into some sort of acid (acetic?) which will eat chip legs i think | ||
| + | i don't know about closed cell | ||
| + | i think closed cell disintegrates much slower but gets ' | ||
| + | </ | ||
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| + | [Lord_Nightmware IIRC] | ||
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| + | < | ||
| + | The open cell foam is very likely polyurethane foam†, which degrades into a powder | ||
| + | (clumps if compressed) primarily via hydrolysis / photo-oxidation depending on the type¹ | ||
| + | and (assuming polyester-based PU) releases mainly adipic acid, which is corrosive². | ||
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| + | †) general consideration of properties, and a few very rough tests such as: | ||
| + | heating (chars: thermoset polymer), comparison against known PU foam; with supportive results. | ||
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| + | https:// | ||
| + | https:// | ||
| + | </ | ||
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| + | [[https:// | ||
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| + | == Brands == | ||
| + | |||
| + | ^ Image ^ Vendor ^ Model ^ Thickness ^ Cell ^ Density lb/ft3 ^ Tensile Strength PSI ^ Notes ^ | ||
| + | | | Zoro | [[https:// | ||
| https:// | https:// | ||
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| * Tensile Strength: 31 psi (215kPa) | * Tensile Strength: 31 psi (215kPa) | ||
| - | < | + | https:// |
| - | depends on whether you want your foam to turn to goo or powder. personally i prefer goo | + | * "For Use With: Pin Insertion" |
| - | 14:57:57 powder is open cell foam, it works as an abrasive too | + | * Density: 50kg/m³ |
| - | 14:58:07 goo is closed cell foam, which is oddly slick | + | * Tensile Strength: 515KPa |
| - | 14:58:23 after 20 years the foams disintegrate | + | |
| - | 14:58:41 open cell foam turns into some sort of acid (acetic?) which will eat chip legs i think | + | |
| - | 14:58:45 i don't know about closed cell | + | |
| - | 14:58:56 i think closed cell disintegrates much slower but gets ' | + | |
| - | </ | + | |
| ===== Density ===== | ===== Density ===== | ||