\n| Transit time<\/td>\n | 22 days<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n Why double PE liner for carbon powder:<\/strong>
\nCarbon powder is hygroscopic \u2014 it absorbs moisture from air. During the 22-day sea transit through the Suez Canal (high humidity), unprotected carbon can gain 3\u20135% moisture. Double PE liner keeps moisture gain below 0.5% during transit. This matters because excess moisture causes sintering defects in CTO production.<\/p>\nClient Performance Feedback<\/h2>\nAfter running our carbon through their CTO production line (first batch = 5 tons for validation):<\/p>\n \n- Sintering quality:<\/strong> Zero void defects, uniform block density<\/li>\n
- Cartridge chlorine reduction:<\/strong> Achieved 15,000+ gallons at 2ppm inlet chlorine (exceeded their 12,000-gallon minimum)<\/li>\n
- Flow rate:<\/strong> 0.5 gpm at <10 psi pressure drop (within spec)<\/li>\n
- Taste\/odor test:<\/strong> Passed \u2014 no carbon taste or smell in filtered water<\/li>\n
- Extractables test:<\/strong> Passed NSF 42 and NSF 61 requirements<\/li>\n
- Particle shedding:<\/strong> None detected after initial 5-gallon flush<\/li>\n<\/ul>\n
They've confirmed a supply agreement for 56 tons per quarter (224 tons\/year).<\/p>\n CTO Carbon Powder Specifications Summary<\/h2>\nIf you're a CTO cartridge manufacturer sourcing activated carbon, here are the key specs to look for:<\/p>\n \n\n\n| Parametre<\/th>\n | Minimum for CTO<\/th>\n | Ideal range<\/th>\n | Why it matters<\/th>\n<\/tr>\n | \n| Raw material<\/td>\n | Coconut shell<\/td>\n | Coconut shell<\/td>\n | Lowest ash, best micropore ratio<\/td>\n<\/tr>\n | \n| a\u011f boyutu<\/td>\n | 80\u00d7200 minimum<\/td>\n | 80\u00d7325<\/td>\n | Proper block density and flow rate<\/td>\n<\/tr>\n | \n| \u0130yot say\u0131s\u0131<\/td>\n | \u22651000 mg\/g<\/td>\n | 1100\u20131200 mg\/g<\/td>\n | Cartridge lifespan<\/td>\n<\/tr>\n | \n| K\u00fcl<\/td>\n | \u22645%<\/td>\n | \u22643%<\/td>\n | Extractables testing<\/td>\n<\/tr>\n | \n| Iron<\/td>\n | \u22640.1%<\/td>\n | \u22640.05%<\/td>\n | Prevents discoloration and metallic taste<\/td>\n<\/tr>\n | \n| pH<\/td>\n | 6\u20139<\/td>\n | 6.5\u20138.0<\/td>\n | Neutral water output<\/td>\n<\/tr>\n | \n| Nem<\/td>\n | \u22648%<\/td>\n | \u22645%<\/td>\n | Sintering quality<\/td>\n<\/tr>\n | \n| Conductivity (water extract)<\/td>\n | \u2264150 \u03bcS\/cm<\/td>\n | \u226480 \u03bcS\/cm<\/td>\n | Low ionic leaching<\/td>\n<\/tr>\n | \n| Apparent density<\/td>\n | 0.40\u20130.60 g\/mL<\/td>\n | 0.45\u20130.55 g\/mL<\/td>\n | Consistent block weight and density<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\nSSS<\/h2>\nWhat activated carbon is used in CTO water filter cartridges?<\/h3>\nCTO (Carbon Block) cartridges use coconut shell activated carbon powder in 80\u00d7325 mesh size. The powder is mixed with polyethylene binder and sintered into a solid block. Coconut shell is preferred because of its high micropore content (best for chlorine removal), low ash (passes food-safety extractables tests), and neutral taste profile. Coal-based carbon is rarely used in drinking water cartridges due to higher ash and potential taste issues.<\/p>\n What mesh size carbon is needed for CTO cartridge production?<\/h3>\n80\u00d7325 mesh (0.044\u20130.177mm particle size) is the standard for most 10-inch CTO cartridges. Some manufacturers use 100\u00d7325 for tighter blocks with slower flow, or 50\u00d7200 for faster flow but slightly lower chlorine removal. The exact size depends on your target flow rate and pressure drop specifications.<\/p>\n How much activated carbon goes into one CTO cartridge?<\/h3>\nA standard 10-inch \u00d7 2.5-inch CTO cartridge contains approximately 300\u2013450 grams of activated carbon (60\u201370% of total block weight, remainder is PE binder). A 10-inch \u00d7 4.5-inch \"big blue\" cartridge contains approximately 1,200\u20131,500 grams. One ton of carbon powder produces approximately 2,200\u20133,300 standard cartridges.<\/p>\n What certifications does CTO carbon need?<\/h3>\nThe carbon itself doesn't carry NSF certification \u2014 the finished cartridge does. However, the carbon must be produced to a standard that allows the cartridge to pass NSF 42 (aesthetic effects \u2014 chlorine, taste, odor) and NSF 61 (health effects \u2014 extractables). Key requirements: low heavy metals, low ash, low conductivity of water extract, no PAH contamination. We supply carbon that has been validated by multiple NSF-certified cartridge manufacturers.<\/p>\n How long does a CTO cartridge last?<\/h3>\nTypically 6\u201312 months or 1,000\u20133,000 gallons depending on inlet water quality and cartridge size. The carbon's iodine number directly determines cartridge life \u2014 higher iodine (1100+) gives 20\u201330% longer life compared to standard 900 iodine carbon. Our 1150 iodine number coconut shell carbon helps manufacturers deliver longer-rated cartridges as a competitive advantage.<\/p>\n
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