{"id":13860,"date":"2026-07-30T06:48:33","date_gmt":"2026-07-30T06:48:33","guid":{"rendered":"https:\/\/hlh-js.com\/?p=13860"},"modified":"2026-07-30T06:48:33","modified_gmt":"2026-07-30T06:48:33","slug":"wet-vs-dry-ceramic-bead-blasting-for-sls-nylon-powder-removal-process-comparison","status":"publish","type":"post","link":"https:\/\/hlh-js.com\/ja\/resource\/blog\/wet-vs-dry-ceramic-bead-blasting-for-sls-nylon-powder-removal-process-comparison\/","title":{"rendered":"Wet vs. Dry Ceramic Bead Blasting for SLS Nylon Powder Removal: Process Comparison"},"content":{"rendered":"<script type=\"application\/ld+json\">{\n    \"@context\": \"https:\\\/\\\/schema.org\",\n    \"@graph\": [\n        {\n            \"@type\": \"Article\",\n            \"headline\": \"Wet vs. Dry Ceramic Bead Blasting for SLS Nylon Powder Removal: Process Comparison\",\n            \"description\": \"A complete comparison of wet and dry ceramic bead blasting for SLS nylon depowdering \\u2014 covering surface finish Ra differences, moisture risk for hygroscopic nylon, post-wet-blast drying protocol, equipment comparison, and decision guide for PA12, PA11, and TPU applications.\",\n            \"datePublished\": \"2026-07-27\",\n            \"dateModified\": \"2026-07-27\",\n            \"author\": {\n                \"@type\": \"Organization\",\n                \"name\": \"Jiangsu Henglihong Technology Co., Ltd.\",\n                \"url\": \"https:\\\/\\\/hlh-js.com\"\n            },\n            \"publisher\": {\n                \"@type\": \"Organization\",\n                \"name\": \"Jiangsu Henglihong Technology Co., Ltd.\",\n                \"url\": \"https:\\\/\\\/hlh-js.com\"\n            },\n            \"mainEntityOfPage\": {\n                \"@type\": \"WebPage\",\n                \"@id\": \"https:\\\/\\\/hlh-js.com\\\/resource\\\/blog\\\/wet-vs-dry-ceramic-bead-blasting-for-sls-nylon-powder-removal-process-comparison\\\/\"\n            }\n        },\n        {\n            \"@type\": \"FAQPage\",\n            \"mainEntity\": [\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"Does wet blasting achieve better surface finish than dry blasting for PA12 SLS parts?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Yes \\u2014 wet blasting with the same bead size typically achieves Ra values 1 to 3 \\u00b5m lower than dry blasting. At 0.15\\u20130.25 mm ZS beads, dry blasting produces Ra 7\\u201312 \\u00b5m on PA12 SLS; wet blasting produces Ra 5\\u20139 \\u00b5m. The water film cushions the impact slightly, reducing the peak stress per impact and producing a finer, more uniform surface texture. For operations with Ra requirements below 5\\u20136 \\u00b5m that fine dry beads cannot consistently achieve, wet blasting is worth evaluating \\u2014 but the moisture management requirements for nylon must be addressed.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"How long should PA12 SLS parts dry after wet blasting before they can be dyed?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"PA12 SLS parts should be dried in a forced-air oven at 60\\u201370\\u00b0C for 2 to 4 hours immediately after wet blasting. Do not allow parts to air-dry at ambient temperature \\u2014 PA12 absorbs moisture from the wet blast environment and will carry excess moisture into the dye bath, resulting in lighter, less saturated colour and potential surface inconsistency. PA11 SLS parts require 70\\u201380\\u00b0C for 3 to 6 hours due to their higher moisture absorption rate. Transfer parts to the dye bath within 1 hour of removing them from the oven.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"Is wet blasting suitable for flexible TPU SLS parts?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"Wet blasting is worth considering for flexible TPU SLS parts because the water film further cushions bead impact, providing an additional safety margin against deformation compared to dry blasting at the same pressure. However, TPU materials vary significantly in their moisture sensitivity \\u2014 some absorb minimal water while others may swell slightly in prolonged wet blast exposure. Always dry TPU parts after wet blasting (40\\u201360\\u00b0C for 2\\u20134 hours) and measure dimensional reference features before and after drying to verify the drying protocol is sufficient. For very soft TPU (Shore A below 80), wet blasting at the lowest possible pressure is often the preferred depowdering approach.\"\n                    }\n                },\n                {\n                    \"@type\": \"Question\",\n                    \"name\": \"What equipment do I need to set up a wet blast system for SLS nylon depowdering?\",\n                    \"acceptedAnswer\": {\n                        \"@type\": \"Answer\",\n                        \"text\": \"A wet blast system for SLS nylon requires: a wet blast cabinet (recirculating slurry pump, blast gun, enclosed chamber with viewing window); a water supply and drain connection; a slurry mixing and agitation system to keep ceramic beads suspended in water; a settling tank or centrifugal separator to remove nylon powder contamination from the recirculating slurry; and a forced-air oven (minimum 60\\u00b0C capability) for post-blast drying of nylon parts. Total capital cost is typically 3\\u20136\\u00d7 higher than an equivalent dry blast cabinet setup. For most PA12 and PA11 operations, the additional Ra benefit of wet blasting does not justify this cost difference unless fine Ra specifications below 5\\u20136 \\u00b5m are required.\"\n                    }\n                }\n            ]\n        }\n    ]\n}<\/script>\n<style>\n.hlh-sls-c06{font-family:'Segoe UI',Arial,sans-serif;color:#2c3e50;line-height:1.82;max-width:860px;margin:0 auto;font-size:16px}\n.hlh-sls-c06 h1{font-size:2rem;color:#1a3456;font-weight:700;line-height:1.28;margin:0 0 .5rem}\n.hlh-sls-c06 h2{font-size:1.46rem;color:#1a3456;font-weight:700;margin:2.5rem 0 .72rem;padding-bottom:.4rem;border-bottom:3px solid #d86e18}\n.hlh-sls-c06 h3{font-size:1.14rem;color:#1a3456;font-weight:700;margin:1.75rem 0 .5rem}\n.hlh-sls-c06 h4{font-size:1rem;color:#d86e18;font-weight:700;margin:1.2rem 0 .35rem}\n.hlh-sls-c06 p{margin:0 0 1rem}.hlh-sls-c06 ul,.hlh-sls-c06 ol{margin:0 0 1rem 1.5rem;padding:0}.hlh-sls-c06 li{margin-bottom:.38rem}\n.hlh-sls-c06 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.fa.open{display:block}.hlh-sls-c06 .fa p:last-child{margin-bottom:0}\n.hlh-sls-c06 .cta{background:linear-gradient(135deg,#1a3456 0%,#24466e 100%);border-radius:10px;padding:2rem 2.3rem;margin:2.8rem 0 1rem;text-align:center}\n.hlh-sls-c06 .cta h3{color:#fff;font-size:1.28rem;margin:0 0 .6rem}.hlh-sls-c06 .cta p{color:rgba(255,255,255,.84);font-size:.94rem;margin-bottom:1.3rem}\n.hlh-sls-c06 .btn{display:inline-block;background:#d86e18;color:#fff!important;font-weight:700;font-size:1rem;padding:.73rem 2.1rem;border-radius:4px;text-decoration:none!important;border:none!important;transition:background .2s}.hlh-sls-c06 .btn:hover{background:#b85a10}\n@media(max-width:640px){.hlh-sls-c06 h1{font-size:1.5rem}.hlh-sls-c06 h2{font-size:1.2rem}.hlh-sls-c06 .cta{padding:1.5rem 1.2rem}}\n<\/style>\n<article class=\"hlh-sls-c06\">\n<div class=\"back\">&#8592; Part of: <a href=\"https:\/\/hlh-js.com\/resource\/blog\/ceramic-beads-sls-powder-removal-complete-guide\/\" target=\"_blank\" rel=\"noopener noreferrer\">Ceramic Beads for SLS Powder Removal \u2014 Complete Guide<\/a><\/div>\n<h1>Wet vs. Dry Ceramic Bead Blasting for SLS Nylon Powder Removal: Process Comparison<\/h1>\n<p class=\"meta\">By Jiangsu Henglihong Technology Co., Ltd. &nbsp;|&nbsp; Last updated: July 2026<\/p>\n<p class=\"lead\">Both wet and dry ceramic bead blasting can depowder SLS nylon parts effectively \u2014 but they deliver different surface finish results, carry different operational requirements, and suit different production contexts. For most PA12 and PA11 operations, dry blasting is the right answer. For applications requiring the finest possible Ra or processing certain flexible TPU geometries, wet blasting earns its higher capital cost and operational complexity. This guide provides the complete comparison so you can make the right choice for your specific production requirements.<\/p>\n<div class=\"stats\">\n  <div class=\"stat\"><span class=\"stat-n\">1\u20133 \u00b5m<\/span><span class=\"stat-l\">Ra advantage of wet blast vs. dry at the same bead size<\/span><\/div>\n  <div class=\"stat\"><span class=\"stat-n\">0.25%<\/span><span class=\"stat-l\">PA12 equilibrium moisture absorption \u2014 low but non-zero<\/span><\/div>\n  <div class=\"stat\"><span class=\"stat-n\">2\u20134 h<\/span><span class=\"stat-l\">PA12 oven drying time after wet blast (60\u201370\u00b0C)<\/span><\/div>\n  <div class=\"stat\"><span class=\"stat-n\">3\u20136\u00d7<\/span><span class=\"stat-l\">Typical capital cost premium of wet blast over dry blast system<\/span><\/div>\n<\/div>\n<nav class=\"toc\"><p class=\"toc-h\">Table of Contents<\/p>\n<ol>\n<li><a href=\"#c06-dry\">How Dry Ceramic Bead Blasting Works for SLS Depowdering<\/a><\/li>\n<li><a href=\"#c06-wet\">How Wet Ceramic Bead Blasting (Hydroblast) Works<\/a><\/li>\n<li><a href=\"#c06-ra\">Surface Finish Ra Comparison: Dry vs. Wet at Matched Bead Sizes<\/a><\/li>\n<li><a href=\"#c06-moisture\">Moisture Risk for SLS Nylon Parts<\/a><\/li>\n<li><a href=\"#c06-drying\">Post-Wet-Blast Drying Protocol<\/a><\/li>\n<li><a href=\"#c06-compare\">Operational and Equipment Comparison<\/a><\/li>\n<li><a href=\"#c06-decision\">Decision Guide: When to Choose Wet or Dry<\/a><\/li>\n<li><a href=\"#c06-faq\">\u3088\u304f\u3042\u308b\u8cea\u554f<\/a><\/li>\n<\/ol><\/nav>\n\n<h2 id=\"c06-dry\">1. How Dry Ceramic Bead Blasting Works for SLS Depowdering<\/h2>\n<p>In dry ceramic bead blasting, compressed air carries ceramic beads from a reservoir \u2014 either by venturi suction (suction-feed) or from a pressurised media pot (pressure-feed) \u2014 through a blast hose and nozzle directed at the part surface inside an enclosed blast cabinet. The cabinet contains the bead and nylon powder debris, which is carried to a dust collector by the air flow while beads fall to the cabinet floor for recirculation.<\/p>\n<p>Dry blasting is the dominant configuration in SLS post-processing operations worldwide as of July 2026, and for good reason: it is faster to set up, simpler to operate, easier to adjust, and lower in capital and operating cost than wet blasting. The principal operational consideration is dust: SLS nylon powder is a fine, inhalable particulate that accumulates rapidly in dry blast cabinet dust collectors and creates an explosion hazard at sufficient concentrations in enclosed spaces. Adequate dust extraction, a correctly sized dust collector, proper PPE (particulate respirator at minimum), and periodic ductwork cleaning are essential for safe dry blast operation on nylon SLS parts.<\/p>\n\n<h2 id=\"c06-wet\">2. How Wet Ceramic Bead Blasting (Hydroblast) Works<\/h2>\n<p>In wet blasting (also called hydroblasting or wet abrasive blasting), ceramic beads are mixed with water in a recirculating slurry system. Compressed air propels the slurry through the blast gun and nozzle. The water film that coats each ceramic bead at impact acts as a thin lubricating layer between the bead and the part surface, cushioning the peak stress of each impact and distributing the force over a slightly larger contact area.<\/p>\n<p>This cushioning effect has two practical consequences: the surface finish Ra achieved at a given bead size is 1\u20133 \u00b5m lower than dry blasting, and the risk of surface deformation on flexible materials is reduced. The water also suppresses the nylon dust cloud that is the primary safety concern of dry blasting \u2014 wet blast cabinets operate essentially dust-free, with all debris captured in the recirculating water.<\/p>\n<p>The operational complexity of wet blasting is meaningfully higher than dry blasting: the recirculating slurry must be maintained at the correct ceramic bead concentration; nylon powder contamination of the slurry must be managed (it does not settle cleanly like metal swarf); the system requires water supply, drain connection, and often pH adjustment for discharge compliance; and nylon SLS parts must be dried immediately and thoroughly after wet blasting to prevent moisture uptake.<\/p>\n\n<h2 id=\"c06-ra\">3. Surface Finish Ra Comparison: Dry vs. Wet at Matched Bead Sizes<\/h2>\n<p>The surface finish advantage of wet blasting is real and consistent across SLS nylon materials and bead grades. At the same bead size and equivalent blast pressure, wet blasting produces Ra values 1 to 3 \u00b5m lower than dry blasting on PA12 SLS.<\/p>\n<div class=\"tw\"><table><thead><tr><th>Bead Size (ZS)<\/th><th>Dry Blast Ra \u2014 PA12<\/th><th>Wet Blast Ra \u2014 PA12<\/th><th>Ra Advantage (Wet)<\/th><\/tr><\/thead>\n<tbody>\n<tr><td>0.05\u20130.10 mm<\/td><td>Ra 4\u20137 \u00b5m<\/td><td>Ra 3\u20135 \u00b5m<\/td><td>~1\u20132 \u00b5m<\/td><\/tr>\n<tr><td>0.10\u20130.15 mm<\/td><td>Ra 5\u20139 \u00b5m<\/td><td>Ra 4\u20137 \u00b5m<\/td><td>~1\u20132 \u00b5m<\/td><\/tr>\n<tr><td>0.15\u20130.25 mm<\/td><td>Ra 7\u201312 \u00b5m<\/td><td>Ra 5\u20139 \u00b5m<\/td><td>~2\u20133 \u00b5m<\/td><\/tr>\n<tr><td>0.25\u20130.35 mm<\/td><td>Ra 9\u201316 \u00b5m<\/td><td>Ra 7\u201312 \u00b5m<\/td><td>~2\u20134 \u00b5m<\/td><\/tr>\n<\/tbody><\/table><\/div>\n<p>The practical implication: if your Ra specification requires \u22645 \u00b5m and fine dry blasting at 0.10\u20130.15 mm can only reliably achieve Ra 5\u20139 \u00b5m, wet blasting at 0.10\u20130.15 mm can consistently reach Ra 4\u20137 \u00b5m \u2014 bringing you into specification with a safety margin. For many operations, this is the decisive factor in choosing wet over dry for appearance-critical parts.<\/p>\n\n<h2 id=\"c06-moisture\">4. Moisture Risk for SLS Nylon Parts<\/h2>\n<p>PA12 and PA11 are hygroscopic \u2014 they absorb water from their environment over time. This hygroscopicity creates specific risks in wet blast applications that dry blasting entirely avoids.<\/p>\n<div class=\"tw\"><table><thead><tr><th>SLS Material<\/th><th>Equilibrium Moisture Absorption<\/th><th>Wet Blast Exposure Risk<\/th><th>Consequence if Not Dried<\/th><\/tr><\/thead>\n<tbody>\n<tr><td><strong>PA12<\/strong><\/td><td>~0.25% at saturation<\/td><td>Low-Moderate (absorbs slowly)<\/td><td>Dimensional change ~0.05\u20130.10%; lighter dye colour<\/td><\/tr>\n<tr><td><strong>PA11<\/strong><\/td><td>~1.0\u20131.2% at saturation<\/td><td>Moderate-High (absorbs faster)<\/td><td>Dimensional change ~0.10\u20130.20%; significant dye colour shift<\/td><\/tr>\n<tr><td><strong>TPU (Shore A 85\u201395)<\/strong><\/td><td>0.5\u20131.5% (grade-dependent)<\/td><td>\u4e2d\u7a0b\u5ea6<\/td><td>Dimensional change; surface tackiness; dye inconsistency<\/td><\/tr>\n<\/tbody><\/table><\/div>\n<p>The equilibrium absorption values above represent saturation \u2014 a condition reached only after prolonged immersion. In a wet blast cycle of 5\u201315 minutes, SLS nylon parts absorb a fraction of their equilibrium value. However, even a 0.05\u20130.15% moisture uptake in PA12 or 0.20\u20130.40% in PA11 is sufficient to cause:<\/p>\n<ul>\n<li>Dimensional swelling that shifts reference dimensions by 10\u201330 \u00b5m \u2014 measurable and potentially non-conforming for tight-tolerance parts<\/li>\n<li>Lighter dye colour due to moisture occupying surface pores that dye molecules would normally penetrate<\/li>\n<li>Reduced coating adhesion if parts proceed to painting or powder coating with residual moisture<\/li>\n<\/ul>\n<p>None of these consequences are permanent \u2014 drying restores the part to its pre-wet-blast condition. The risk only materialises if the drying step is skipped or abbreviated.<\/p>\n\n<h2 id=\"c06-drying\">5. Post-Wet-Blast Drying Protocol<\/h2>\n<div class=\"box box-a\">\n<h4>Mandatory drying protocol after wet ceramic bead blasting<\/h4>\n<ul>\n<li><strong>Step 1:<\/strong> Remove parts from wet blast cabinet immediately upon cycle completion<\/li>\n<li><strong>Step 2:<\/strong> Blow surface water from all accessible surfaces and cavities with clean dry compressed air<\/li>\n<li><strong>Step 3 \u2014 PA12:<\/strong> forced-air oven at 60\u201370\u00b0C for 2 to 4 hours (thin-wall parts: 2 h; thick-wall parts: 4 h)<\/li>\n<li><strong>Step 3 \u2014 PA11:<\/strong> forced-air oven at 70\u201380\u00b0C for 3 to 6 hours<\/li>\n<li><strong>Step 3 \u2014 TPU:<\/strong> forced-air at 40\u201360\u00b0C for 2 to 4 hours (temperature must stay below material softening point)<\/li>\n<li><strong>Step 4:<\/strong> Verify dimensional return on reference features (pre-wet-blast dimension should be restored within measurement uncertainty)<\/li>\n<li><strong>Step 5:<\/strong> Transfer to dyeing, coating, or inspection within 1 hour of removing from oven; or seal in airtight packaging if longer holding is needed<\/li>\n<\/ul>\n<\/div>\n<p>Never allow wet-blasted nylon SLS parts to air-dry at ambient temperature. PA12 and PA11 will absorb ambient humidity during the air-drying period, potentially reaching higher moisture content than immediately post-blast. Forced-air oven drying at elevated temperature drives moisture out of the nylon structure reliably and quickly.<\/p>\n\n<h2 id=\"c06-compare\">6. Operational and Equipment Comparison<\/h2>\n<div class=\"tw\"><table><thead><tr><th>Factor<\/th><th>Dry Blast Cabinet<\/th><th>Wet Blast System<\/th><\/tr><\/thead>\n<tbody>\n<tr><td><strong>Capital cost<\/strong><\/td><td>USD 2,000\u201320,000<\/td><td>USD 8,000\u201345,000 + water treatment<\/td><\/tr>\n<tr><td><strong>Operating cost<\/strong><\/td><td>Compressed air + media + labor + dust disposal<\/td><td>Above + water + water treatment + drying energy<\/td><\/tr>\n<tr><td><strong>Setup time<\/strong><\/td><td>5\u201310 minutes<\/td><td>15\u201330 minutes (slurry check, bead concentration)<\/td><\/tr>\n<tr><td><strong>Throughput<\/strong><\/td><td>\u9ad8\u3044<\/td><td>Moderate (slower slurry flow; drying step adds time)<\/td><\/tr>\n<tr><td><strong>\u7c89\u5875\u306e\u767a\u751f<\/strong><\/td><td>High \u2014 requires extraction and PPE<\/td><td>Minimal \u2014 water suppresses nylon dust<\/td><\/tr>\n<tr><td><strong>Ra at same bead size<\/strong><\/td><td>Baseline<\/td><td>1\u20133 \u00b5m lower (finer)<\/td><\/tr>\n<tr><td><strong>Moisture risk for parts<\/strong><\/td><td>\u306a\u3057<\/td><td>Mandatory drying step required<\/td><\/tr>\n<tr><td><strong>Media monitoring<\/strong><\/td><td>Sieve analysis<\/td><td>Sieve analysis + slurry concentration check<\/td><\/tr>\n<tr><td><strong>Water treatment<\/strong><\/td><td>Not applicable<\/td><td>Settling + pH adjustment + discharge compliance<\/td><\/tr>\n<\/tbody><\/table><\/div>\n\n<h2 id=\"c06-decision\">7. Decision Guide: When to Choose Wet or Dry<\/h2>\n<div class=\"box\">\n<h4>Choose dry ceramic bead blasting when:<\/h4>\n<ul>\n<li>Processing PA12 or PA11 at any production volume where Ra \u2265 5\u20136 \u00b5m is acceptable<\/li>\n<li>Dyeing or coating will follow blasting \u2014 simplest to avoid moisture management entirely<\/li>\n<li>Capital budget favours a simpler, lower-cost setup<\/li>\n<li>Throughput is the primary driver<\/li>\n<li>Your facility lacks the water supply and drain infrastructure for wet blasting<\/li>\n<\/ul>\n<\/div>\n<div class=\"box box-a\">\n<h4>Consider wet ceramic bead blasting when:<\/h4>\n<ul>\n<li>Ra specification is \u2264 5 \u00b5m and fine dry blasting cannot consistently reach that target<\/li>\n<li>Processing flexible TPU SLS parts where the water-cushioned impact reduces deformation risk<\/li>\n<li>Air quality or dust management regulations in your facility make dry blasting impractical<\/li>\n<li>You have existing wet blast infrastructure from other manufacturing operations<\/li>\n<li>Parts require the most uniform, visually consistent matte surface for premium appearance applications<\/li>\n<\/ul>\n<\/div>\n\n<h2 id=\"c06-faq\">\u3088\u304f\u3042\u308b\u8cea\u554f<\/h2>\n<div>\n<div class=\"fi\"><button class=\"fq\" aria-expanded=\"false\">Does wet blasting achieve better surface finish than dry blasting for PA12 SLS parts? <span class=\"fi-icon\">+<\/span><\/button>\n<div class=\"fa\"><p>Yes. Wet blasting with the same bead size typically achieves Ra values 1 to 3 \u00b5m lower than dry blasting. At 0.15\u20130.25 mm ZS beads, dry blasting produces Ra 7\u201312 \u00b5m on PA12 SLS; wet blasting produces Ra 5\u20139 \u00b5m. The water film cushions the impact, reducing peak stress per particle and producing a finer, more uniform surface texture. For operations with Ra requirements below 5\u20136 \u00b5m that fine dry beads cannot consistently achieve, wet blasting is worth evaluating \u2014 but the mandatory drying protocol for hygroscopic nylon must be implemented immediately after blasting.<\/p><\/div><\/div>\n<div class=\"fi\"><button class=\"fq\" aria-expanded=\"false\">How long should PA12 SLS parts dry after wet blasting before dyeing? <span class=\"fi-icon\">+<\/span><\/button>\n<div class=\"fa\"><p>PA12 SLS parts should be dried in a forced-air oven at 60\u201370\u00b0C for 2 to 4 hours immediately after wet blasting. Never allow parts to air-dry at ambient temperature \u2014 PA12 absorbs ambient humidity during uncontrolled air drying, potentially reaching higher moisture content than immediately post-blast. PA11 SLS parts require 70\u201380\u00b0C for 3 to 6 hours due to their higher moisture absorption rate. Transfer parts to the dye bath within 1 hour of removing from the oven, or seal in airtight packaging if a longer holding time is required.<\/p><\/div><\/div>\n<div class=\"fi\"><button class=\"fq\" aria-expanded=\"false\">Is wet blasting suitable for flexible TPU SLS parts? <span class=\"fi-icon\">+<\/span><\/button>\n<div class=\"fa\"><p>Wet blasting is worth considering for flexible TPU SLS parts because the water film provides additional impact cushioning, giving a safer margin against deformation compared to dry blasting at the same pressure. However, TPU materials vary significantly in moisture sensitivity \u2014 dry them at 40\u201360\u00b0C for 2\u20134 hours immediately after wet blasting and measure reference dimensions before and after to confirm dimensional return. For very soft TPU (Shore A below 80), wet blasting at reduced pressure (25\u201335 PSI) is often the preferred depowdering approach when the dry blast protocol cannot stay below the deformation threshold.<\/p><\/div><\/div>\n<div class=\"fi\"><button class=\"fq\" aria-expanded=\"false\">What equipment is needed for a wet blast system for SLS nylon depowdering? <span class=\"fi-icon\">+<\/span><\/button>\n<div class=\"fa\"><p>A wet blast system for SLS nylon requires: a wet blast cabinet with recirculating slurry pump, blast gun, enclosed chamber, and viewing window; a water supply and drain; a slurry agitation system to keep ceramic beads suspended; a settling tank or centrifugal separator to remove nylon powder from the recirculating slurry; and a forced-air oven at minimum 70\u00b0C capability for post-blast drying. Total capital cost is typically 3\u20136\u00d7 higher than an equivalent dry blast cabinet. For most PA12 and PA11 operations where Ra 6\u201312 \u00b5m is acceptable, the additional capital and operational cost of wet blasting is difficult to justify.<\/p><\/div><\/div>\n<\/div>\n\n<h2>Related Articles in This Series<\/h2>\n<p>Return to the <a href=\"https:\/\/hlh-js.com\/resource\/blog\/ceramic-beads-sls-powder-removal-complete-guide\/\" target=\"_blank\" rel=\"noopener noreferrer\">Ceramic Beads for SLS Powder Removal \u2014 Complete Guide<\/a> for the full overview.<\/p>\n<div class=\"rel-g\">\n<div class=\"rel-c\"><a href=\"https:\/\/hlh-js.com\/resource\/blog\/surface-finish-and-ra-values-after-ceramic-bead-blasting-sls-3d-printed-parts\/\" target=\"_blank\" rel=\"noopener noreferrer\">Surface Finish Ra Values After Ceramic Bead Blasting<\/a><p>Complete Ra dataset for dry blasting \u2014 context for the wet vs. dry Ra comparison.<\/p><\/div>\n<div class=\"rel-c\"><a href=\"https:\/\/hlh-js.com\/resource\/blog\/blast-pressure-and-cycle-time-for-ceramic-bead-sls-depowdering-optimization-guide\/\" target=\"_blank\" rel=\"noopener noreferrer\">Blast Pressure and Cycle Time Optimization<\/a><p>Pressure parameters for dry blast systems \u2014 the protocol underpinning both wet and dry approaches.<\/p><\/div>\n<div class=\"rel-c\"><a href=\"https:\/\/hlh-js.com\/resource\/blog\/color-consistency-and-dye-preparation-for-sls-parts-after-ceramic-bead-blasting\/\" target=\"_blank\" rel=\"noopener noreferrer\">Color Consistency and Dye Preparation<\/a><p>How the choice of wet or dry blasting affects pre-dye surface condition and colour depth.<\/p><\/div>\n<div class=\"rel-c\"><a href=\"https:\/\/hlh-js.com\/resource\/blog\/ceramic-bead-blasting-tpu-flexible-sls-parts-gentle-depowdering-without-deformation\/\" target=\"_blank\" rel=\"noopener noreferrer\">TPU Flexible SLS Depowdering<\/a><p>When wet blasting offers a meaningful safety margin for flexible SLS materials.<\/p><\/div>\n<div class=\"rel-c\"><a href=\"https:\/\/hlh-js.com\/resource\/blog\/ceramic-bead-depowdering-pa11-nylon-sls-parts-bio-based-material-processing\/\" target=\"_blank\" rel=\"noopener noreferrer\">PA11 Nylon SLS Depowdering<\/a><p>PA11&#8217;s higher moisture absorption makes drying protocol especially important after wet blast.<\/p><\/div>\n<div class=\"rel-c\"><a href=\"https:\/\/hlh-js.com\/resource\/blog\/ceramic-bead-size-selection-for-sls-powder-removal-matching-mesh-to-part-geometry\/\" target=\"_blank\" rel=\"noopener noreferrer\">Ceramic Bead Size Selection Guide<\/a><p>Bead size selection principles that apply equally to wet and dry blast processes.<\/p><\/div>\n<\/div>\n<div class=\"cta\"><h3>Ceramic Beads for Both Wet and Dry SLS Depowdering<\/h3>\n<p>Jiangsu Henglihong Technology Co., Ltd. supplies ZS and ZrO\u2082 ceramic blasting beads in ISO-classified size ranges from 0.05 mm to 0.60 mm \u2014 suitable for both dry and wet blast applications. Tell us your Ra target and blast system type and we will recommend the right grade and size.<\/p>\n<a href=\"https:\/\/hlh-js.com\/contact\/\" target=\"_blank\" rel=\"noopener noreferrer\" class=\"btn\">Request Samples &amp; Technical Support<\/a><\/div>\n<\/article>\n<script>(function(){var b=document.querySelectorAll('.hlh-sls-c06 .fq');b.forEach(function(btn){btn.addEventListener('click',function(){var a=this.nextElementSibling,o=a.classList.contains('open');document.querySelectorAll('.hlh-sls-c06 .fa').forEach(function(x){x.classList.remove('open')});document.querySelectorAll('.hlh-sls-c06 .fq').forEach(function(x){x.classList.remove('open');x.setAttribute('aria-expanded','false')});if(!o){a.classList.add('open');btn.classList.add('open');btn.setAttribute('aria-expanded','true')}})})})();<\/script>","protected":false},"excerpt":{"rendered":"<p>&#8592; Part of: Ceramic Beads for SLS Powder Removal \u2014  [&#8230;]<\/p>","protected":false},"author":1,"featured_media":13862,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[62,175,138],"tags":[],"class_list":["post-13860","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blog","category-industry","category-resource"],"_links":{"self":[{"href":"https:\/\/hlh-js.com\/ja\/wp-json\/wp\/v2\/posts\/13860","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hlh-js.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hlh-js.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/ja\/wp-json\/wp\/v2\/comments?post=13860"}],"version-history":[{"count":2,"href":"https:\/\/hlh-js.com\/ja\/wp-json\/wp\/v2\/posts\/13860\/revisions"}],"predecessor-version":[{"id":13863,"href":"https:\/\/hlh-js.com\/ja\/wp-json\/wp\/v2\/posts\/13860\/revisions\/13863"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hlh-js.com\/ja\/wp-json\/wp\/v2\/media\/13862"}],"wp:attachment":[{"href":"https:\/\/hlh-js.com\/ja\/wp-json\/wp\/v2\/media?parent=13860"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hlh-js.com\/ja\/wp-json\/wp\/v2\/categories?post=13860"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hlh-js.com\/ja\/wp-json\/wp\/v2\/tags?post=13860"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}