{"id":3534,"date":"2026-09-21T09:38:42","date_gmt":"2026-09-21T09:38:42","guid":{"rendered":"https:\/\/py-pet.com\/?p=3534"},"modified":"2026-09-21T09:57:45","modified_gmt":"2026-09-21T09:57:45","slug":"bentonite-clumping-process","status":"publish","type":"post","link":"https:\/\/py-pet.com\/ru\/bentonite-clumping-process\/","title":{"rendered":"How PY-PET processes bentonite into 99% clumping-strength cat litter"},"content":{"rendered":"<p class=\"lede\">Bentonite is the global default for clumping cat litter \u2014 and it is also the substrate most often described with the wrong technical vocabulary in B2B copy. This article walks through how a real <a href=\"https:\/\/py-pet.com\/ru\/cat-litter-manufacturers\/\" target=\"_blank\" rel=\"noopener\">cat litter manufacturer<\/a> (PY-PET, Aisha-Pet factory, Dalian) takes Wyoming-grade sodium bentonite from inbound rail-car to a 26 MT 20-foot container of 99 % clumping-strength finished litter \u2014 and corrects the most common technical claim we see on competitor sites.<\/p>\n<div class=\"pull\"><strong>One correction before we start.<\/strong> Bentonite does not &#8220;swell&#8221; in the litter tray. The mechanism is a sodium-ions-and-water micro-structure rearrangement, not a 15\u00d7 expansion. Any <a href=\"https:\/\/py-pet.com\/ru\/cat-litter-manufacturers\/\" target=\"_blank\" rel=\"noopener\">\u0444\u0430\u0431\u0440\u0438\u043a\u0430 \u043a\u043e\u0448\u0430\u0447\u044c\u0435\u0433\u043e \u043d\u0430\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044f<\/a> that puts &#8220;expands 15\u00d7&#8221; or &#8220;lattice swelling locks urine&#8221; on a spec sheet is selling marketing, not mineralogy. The clumping works because sodium bentonite absorbs water, holds it inside the granule, and binds granule-to-granule through a thin water film. That is the whole mechanism. Below, we describe it that way.<\/div>\n<div><\/div>\n<div><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone wp-image-3453 size-full\" src=\"https:\/\/py-pet.com\/wp-content\/uploads\/2026\/09\/How-Cat-Global-Bentonite-Cat-Litter-Is-Made-\u2014-Factory-Floor-Walkthrough.jpg\" alt=\"bentonite cat litter clumping\" width=\"600\" height=\"400\" srcset=\"https:\/\/py-pet.com\/wp-content\/uploads\/2026\/09\/How-Cat-Global-Bentonite-Cat-Litter-Is-Made-\u2014-Factory-Floor-Walkthrough.jpg 600w, https:\/\/py-pet.com\/wp-content\/uploads\/2026\/09\/How-Cat-Global-Bentonite-Cat-Litter-Is-Made-\u2014-Factory-Floor-Walkthrough-300x200.jpg 300w, https:\/\/py-pet.com\/wp-content\/uploads\/2026\/09\/How-Cat-Global-Bentonite-Cat-Litter-Is-Made-\u2014-Factory-Floor-Walkthrough-18x12.jpg 18w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/div>\n<div><\/div>\n<h2>The PY-PET bentonite flow \u2014 inbound to outbound container<\/h2>\n<hr \/>\n<div class=\"flow-step\">\n<ul>\n<li>\n<h4>Incoming bentonite<\/h4>\n<\/li>\n<\/ul>\n<p>Wyoming-grade sodium bentonite, \u2265 90 % montmorillonite, low-dust grade<\/p>\n<\/div>\n<div class=\"flow-step\">\n<ul>\n<li>\n<h4>Crush &amp; screen<\/h4>\n<\/li>\n<\/ul>\n<p>Coarse-grind round granules, 0.75\u20130.88 g\/mL density<\/p>\n<\/div>\n<div class=\"flow-step\">\n<ul>\n<li class=\"n\">\n<h4>Dry &amp; classify<\/h4>\n<\/li>\n<\/ul>\n<p>Moisture \u2264 10 %; oversized \/ undersized removal<\/p>\n<\/div>\n<div class=\"flow-step\">\n<ul>\n<li>\n<h4>Fragrance blend<\/h4>\n<\/li>\n<\/ul>\n<p>Apple \u00b7 Lavender \u00b7 Rose \u00b7 Green Tea \u00b7 Coffee \u00b7 Lemon<\/p>\n<\/div>\n<div class=\"flow-step\">\n<ul>\n<li>\n<h4>Pack &amp; seal<\/h4>\n<\/li>\n<\/ul>\n<p>PE inner bag + Kraft \/ woven outer; 5\u201325 kg or 5\u201325 L<\/p>\n<ul>\n<li>\n<h4>SGS COA + export docs<\/h4>\n<\/li>\n<\/ul>\n<p>Health Cert \u00b7 COA \u00b7 MSDS \u00b7 COO \u00b7 Packing List \u00b7 Invoice<\/p>\n<p>&nbsp;<\/p>\n<h3>Stage 1 \u2014 Incoming bentonite<\/h3>\n<p>PY-PET sources Wyoming-grade sodium bentonite \u2014 the same geological class used by North American litter producers \u2014 in bulk rail-cars or 1-ton big-bags into the Aisha-Pet factory in Dalian. Incoming lots are sampled and tested at intake: montmorillonite content, moisture, particle size distribution, and a &#8220;water drop&#8221; clumping test (one drop of water on a compacted disc \u2014 should form a hard nodule in &lt; 5 seconds).<\/p>\n<p>Lots that fail intake are rejected back to the upstream supplier \u2014 this is rare but it is the reason we have been able to keep the bulk-cat-litter clumping-strength floor at \u2265 99 % across batches since 2018.<\/p>\n<p>&nbsp;<\/p>\n<h3>Stage 2 \u2014 Crush &amp; screen<\/h3>\n<p>Incoming bentonite is hammer-milled into coarse-grind round granules. The granule shape matters more than buyers expect: round granules track less out of the litter tray, hold less dust, and present a more uniform surface for fragrance coating.<\/p>\n<p><strong>PY-PET bentonite physical spec:<\/strong><\/p>\n<table>\n<thead>\n<tr>\n<th>Parameter<\/th>\n<th>PY-PET value<\/th>\n<th>Industry typical<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Density<\/td>\n<td>0.75\u20130.88 g\/mL<\/td>\n<td>0.75\u20130.95 g\/mL<\/td>\n<\/tr>\n<tr>\n<td>Granule shape<\/td>\n<td>Round, coarse-grind<\/td>\n<td>Irregular \/ fine-grind<\/td>\n<\/tr>\n<tr>\n<td>Moisture<\/td>\n<td>\u2264 10 %<\/td>\n<td>\u2264 12 %<\/td>\n<\/tr>\n<tr>\n<td>Dust content (post-extraction)<\/td>\n<td>&lt; 0.5 %<\/td>\n<td>0.8\u20131.5 %<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Buyers searching for <em>bulk clumping cat litter<\/em> or <em>wholesale clumping cat litter<\/em> usually evaluate on dust and clumping strength. Both are managed at this stage \u2014 dust at the dust-extraction step right after milling, clumping strength at the incoming-lot acceptance test.<\/p>\n<p>&nbsp;<\/p>\n<h3>Stage 3 \u2014 Dry &amp; classify<\/h3>\n<p>After milling, the bentonite is dried to \u2264 10 % moisture and air-classified to remove oversized and undersized granules. Oversized granules reduce clumping speed (less surface area per gram); undersized granules are dust.<\/p>\n<p>The classification step is the single biggest reason a B2B buyer should ask a <a href=\"https:\/\/py-pet.com\/ru\/cat-litter-manufacturers\/\" target=\"_blank\" rel=\"noopener\">cat litter manufacturer<\/a> about their dust-extraction equipment rather than relying on the catalog spec.<\/p>\n<p>&nbsp;<\/p>\n<h3>Stage 4 \u2014 Fragrance blend<\/h3>\n<p>PY-PET runs bentonite through a fragrance-coating drum. Each fragrance is dosed at 0.3\u20130.5 % by weight \u2014 enough to be noticeable through a sealed bag for 12\u201318 months, low enough that the litter does not off-gas in a small apartment.<\/p>\n<p><strong>PY-PET bentonite stock fragrances (6):<\/strong> Apple \u00b7 Lavender \u00b7 Rose \u00b7 Green Tea \u00b7 Coffee \u00b7 Lemon. Custom fragrance development is available for orders \u2265 1 \u00d7 20GP.<\/p>\n<p>Note: bentonite does not ship with a &#8220;no fragrance&#8221; or &#8220;unscented&#8221; option as a default \u2014 the mineral has its own faint earthy note that becomes a &#8220;wet dog&#8221; smell in a closed tray. The 6 stock fragrances are formulated to mask that without overwhelming the room.<\/p>\n<p>&nbsp;<\/p>\n<h3>Stage 5 \u2014 Pack &amp; seal<\/h3>\n<p>PY-PET packs bentonite cat litter in either:<\/p>\n<ul>\n<li><strong>Weight-based packs:<\/strong> 5 kg \u00b7 10 kg \u00b7 20 kg<\/li>\n<li><strong>Volume-based packs:<\/strong> 5 L \u00b7 10 L \u00b7 25 L<\/li>\n<li><strong>Custom pack:<\/strong> free artwork service on PE inner bag + Kraft paper \/ woven outer<\/li>\n<\/ul>\n<p>For B2B buyers sourcing <em>bulk cat litter 50 lbs<\/em> or <em>bulk cat litter 100 lbs<\/em>, PY-PET can configure to those pack sizes on request.<\/p>\n<p>&nbsp;<\/p>\n<h3>Stage 6 \u2014 SGS COA + export documentation<\/h3>\n<p>Every PY-PET bentonite batch carries a third-party SGS Certificate of Analysis with the following tests:<\/p>\n<table>\n<thead>\n<tr>\n<th>Test<\/th>\n<th>PY-PET specification<\/th>\n<th>Method<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Dust content<\/td>\n<td>&lt; 0.5 %<\/td>\n<td>200-mesh sieve<\/td>\n<\/tr>\n<tr>\n<td>Lead<\/td>\n<td>\u2264 5 mg\/kg<\/td>\n<td>ICP-MS, SGS verified<\/td>\n<\/tr>\n<tr>\n<td>Arsenic<\/td>\n<td>\u2264 2 mg\/kg<\/td>\n<td>ICP-MS, SGS verified<\/td>\n<\/tr>\n<tr>\n<td>Cadmium<\/td>\n<td>\u2264 1 mg\/kg<\/td>\n<td>ICP-MS, SGS verified<\/td>\n<\/tr>\n<tr>\n<td>pH<\/td>\n<td>8.5\u20139.5 (typical bentonite range)<\/td>\n<td>1 : 5 water extract<\/td>\n<\/tr>\n<tr>\n<td>Water absorption<\/td>\n<td>\u2265 300 %<\/td>\n<td>EN 13060 method<\/td>\n<\/tr>\n<tr>\n<td>Clumping strength<\/td>\n<td>\u2265 99 %<\/td>\n<td>in-house 200 ml water test<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Documents that ship with every container: Health Certificate \u00b7 COA \u00b7 MSDS \u00b7 COO \u00b7 Packing List \u00b7 Commercial Invoice. See the full documentation walkthrough in <a href=\"https:\/\/py-pet.com\/ru\/cat-litter-manufacturer-china\/\" target=\"_blank\" rel=\"noopener\">sourcing bulk cat litter from China \u2014 what documentation actually matters<\/a>.<\/p>\n<p>&nbsp;<\/p>\n<h2>What &#8220;99 % clumping strength&#8221; actually means<\/h2>\n<hr \/>\n<p>PY-PET reports clumping strength as the percentage of a 200 ml water dose that binds into a scoopable mass within 5 seconds. The industry typical is 70\u201395 %. We hold \u2265 99 % by:<\/p>\n<ol>\n<li>Rejecting incoming bentonite lots below the montmorillonite-content threshold.<\/li>\n<li>Standardising granule shape and size in the crush-and-screen stage.<\/li>\n<li>Running a 200 ml water test on every production batch, not just at incoming.<\/li>\n<\/ol>\n<p>For buyers comparing <em>wholesale clumping cat litter<\/em> quotes, ask each factory for the same three data points: incoming-lot montmorillonite content, dust %, and clumping-strength test method. Three out of three responses will tell you whether you are talking to a real <a href=\"https:\/\/py-pet.com\/ru\/cat-litter-manufacturers\/\" target=\"_blank\" rel=\"noopener\">\u0444\u0430\u0431\u0440\u0438\u043a\u0430 \u043a\u043e\u0448\u0430\u0447\u044c\u0435\u0433\u043e \u043d\u0430\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044f<\/a> or a trading company.<\/p>\n<p>&nbsp;<\/p>\n<h2>Container load and order parameters<\/h2>\n<hr \/>\n<p>&nbsp;<\/p>\n<table>\n<thead>\n<tr>\n<th>Parameter<\/th>\n<th>PY-PET bentonite<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>20FT container load<\/td>\n<td>\u2248 26 MT<\/td>\n<\/tr>\n<tr>\n<td>Lead time<\/td>\n<td>Within 20 days from deposit<\/td>\n<\/tr>\n<tr>\n<td>Trial order<\/td>\n<td>2-ton minimum<\/td>\n<\/tr>\n<tr>\n<td>Free sample<\/td>\n<td>1 kg (freight collect)<\/td>\n<\/tr>\n<tr>\n<td>Incoterms<\/td>\n<td>FOB Dalian \u00b7 CIF \/ DDP per lane<\/td>\n<\/tr>\n<tr>\n<td>Payment<\/td>\n<td>T\/T 30 % + 70 % against B\/L copy<\/td>\n<\/tr>\n<tr>\n<td>Certifications<\/td>\n<td>ISO 9001 \u00b7 BSCI \u00b7 Sedex \u00b7 SGS \u00b7 MSDS<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>&nbsp;<\/p>","protected":false},"excerpt":{"rendered":"<p>Bentonite is the global default for clumping cat litter \u2014 and it is also the substrate most often described with the wrong technical vocabulary in B2B copy. This article walks through how a real cat litter manufacturer (PY-PET, Aisha-Pet factory, Dalian) takes Wyoming-grade sodium bentonite from inbound rail-car to a 26 MT 20-foot container of [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":3453,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[31],"tags":[],"class_list":["post-3534","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-cat-litter-technology"],"_links":{"self":[{"href":"https:\/\/py-pet.com\/ru\/wp-json\/wp\/v2\/posts\/3534","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/py-pet.com\/ru\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/py-pet.com\/ru\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/py-pet.com\/ru\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/py-pet.com\/ru\/wp-json\/wp\/v2\/comments?post=3534"}],"version-history":[{"count":2,"href":"https:\/\/py-pet.com\/ru\/wp-json\/wp\/v2\/posts\/3534\/revisions"}],"predecessor-version":[{"id":3548,"href":"https:\/\/py-pet.com\/ru\/wp-json\/wp\/v2\/posts\/3534\/revisions\/3548"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/py-pet.com\/ru\/wp-json\/wp\/v2\/media\/3453"}],"wp:attachment":[{"href":"https:\/\/py-pet.com\/ru\/wp-json\/wp\/v2\/media?parent=3534"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/py-pet.com\/ru\/wp-json\/wp\/v2\/categories?post=3534"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/py-pet.com\/ru\/wp-json\/wp\/v2\/tags?post=3534"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}