{"id":4629,"date":"2026-04-02T06:38:43","date_gmt":"2026-04-02T14:38:43","guid":{"rendered":"https:\/\/haifengmachine.com\/?post_type=news&#038;p=4629"},"modified":"2026-04-02T06:44:29","modified_gmt":"2026-04-02T14:44:29","slug":"decoding-liquid-rubber-the-core-dna-of-cast-polyurethane-elastomers","status":"publish","type":"news","link":"https:\/\/haifengmachine.com\/ja\/news\/decoding-liquid-rubber-the-core-dna-of-cast-polyurethane-elastomers\/","title":{"rendered":"\u6db2\u72b6\u30b4\u30e0\u300d\u306e\u89e3\u8aad\u92f3\u9020\u30dd\u30ea\u30a6\u30ec\u30bf\u30f3\u30fb\u30a8\u30e9\u30b9\u30c8\u30de\u30fc\u306e\u6838\u3068\u306a\u308bDNA"},"content":{"rendered":"<div data-elementor-type=\"wp-post\" data-elementor-id=\"4629\" class=\"elementor elementor-4629\" data-elementor-post-type=\"news\">\n\t\t\t\t<div class=\"elementor-element elementor-element-5332f24 e-flex e-con-boxed e-con e-parent\" data-id=\"5332f24\" data-element_type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-59f080c elementor-widget elementor-widget-text-editor\" data-id=\"59f080c\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p data-path-to-node=\"10\"><span data-path-to-node=\"10,1\"><span class=\"citation-186\">Cast Polyurethane (CPU), widely known in the industry as &#8220;liquid rubber,&#8221; is an advanced product manufactured by pouring a liquid reaction mixture directly into a mold<\/span><\/span><span data-path-to-node=\"10,3\">. <\/span><span data-path-to-node=\"10,5\"><span class=\"citation-185\">As a major branch of the polyurethane family, its unique two-phase structure\u2014comprising both soft and hard segments\u2014endows it with exceptional mechanical, physical, and chemical properties<\/span><\/span><span data-path-to-node=\"10,7\">.<\/span><\/p><p id=\"p-rc_a14489cd4b5d079b-78\" data-path-to-node=\"11\"><span data-path-to-node=\"11,1\"><span class=\"citation-184\">By perfectly bridging the high elasticity and shock-absorbing capabilities of rubber with the rigidity of plastic, CPU has become indispensable across the national economy, penetrating sectors such as chemicals, electronics, automotive, defense, aerospace, medical, and construction<\/span><\/span><span data-path-to-node=\"11,3\">.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-5217af0 elementor-widget elementor-widget-heading\" data-id=\"5217af0\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">The Chemical Matrix: 3 Core Raw Materials of CPU<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-f3ede71 elementor-widget elementor-widget-text-editor\" data-id=\"f3ede71\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span data-path-to-node=\"13,1\"><span class=\"citation-183\">A top-tier CPU product relies on a rigorously engineered formulation consisting of three primary components, often supplemented by specific functional additives<\/span><\/span><span data-path-to-node=\"13,3\">:<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-88d2e94 elementor-widget elementor-widget-text-editor\" data-id=\"88d2e94\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p data-path-to-node=\"14\"><span data-path-to-node=\"14,0\"><b data-path-to-node=\"14,0\" data-index-in-node=\"0\">1. Polyols (The Flexible Soft Segment):<\/b> <\/span><span data-path-to-node=\"14,2\"><span class=\"citation-182\">Polyols form the soft segment of the CPU matrix, providing the product&#8217;s fundamental flexibility<\/span><\/span><span data-path-to-node=\"14,4\">. <\/span><span data-path-to-node=\"14,6\"><span class=\"citation-181\">Industrial applications primarily utilize polyether polyols and polyester polyols<\/span><\/span><span data-path-to-node=\"14,8\">.<\/span><\/p><p data-path-to-node=\"15\"><span data-path-to-node=\"15,0\"><b data-path-to-node=\"15,0\" data-index-in-node=\"0\">2. Isocyanates (The Rigid Hard Segment):<\/b> <\/span><span data-path-to-node=\"15,2\"><span class=\"citation-180\">Acting as the hard segment, isocyanates deliver the necessary rigidity and structural strength<\/span><\/span><span data-path-to-node=\"15,4\">. <\/span><span data-path-to-node=\"15,6\"><span class=\"citation-179\">The most common types used in CPU production include Toluene Diisocyanate (TDI), 4,4&#8242;-Diphenylmethane Diisocyanate (MDI), 1,5-Naphthalene Diisocyanate (NDI), and Paraphenylene Diisocyanate (PPDI)<\/span><\/span><span data-path-to-node=\"15,8\">.<\/span><\/p><p id=\"p-rc_a14489cd4b5d079b-82\" data-path-to-node=\"16\"><span data-path-to-node=\"16,0\"><b data-path-to-node=\"16,0\" data-index-in-node=\"0\">3. Chain Extenders (The Curing Catalysts):<\/b> <\/span><span data-path-to-node=\"16,2\"><span class=\"citation-178\">For polyurethane elastomers, chain extenders are generally divided into amines and alcohols<\/span><\/span><span data-path-to-node=\"16,4\">. <\/span><span data-path-to-node=\"16,6\"><span class=\"citation-177\">Diamine extenders are predominantly used in TDI-based elastomer production and are categorized into aromatic and aliphatic diamines<\/span><\/span><span data-path-to-node=\"16,8\">. <\/span><span data-path-to-node=\"16,10\"><span class=\"citation-176\">Crucially, CPU products must utilize aromatic diamines; aliphatic diamines have excessively high reactivity, causing rapid gelling when reacting with isocyanates, making them completely unsuitable for the casting process<\/span><\/span><span data-path-to-node=\"16,12\">.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-24ac9ea elementor-widget elementor-widget-text-editor\" data-id=\"24ac9ea\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span data-path-to-node=\"17,1\"><span class=\"citation-175\">To further improve processing performance, enhance product characteristics, or reduce costs, manufacturers often incorporate additives such as plasticizers, fillers, colorants, and catalysts, along with stabilizers like antioxidants, wear-resistant agents, and flame retardants.<\/span><\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-d5541c0 elementor-widget elementor-widget-heading\" data-id=\"d5541c0\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">The Standard CPU Casting Workflow:<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-e743252 elementor-widget elementor-widget-text-editor\" data-id=\"e743252\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p data-path-to-node=\"19\"><span data-path-to-node=\"21,2\"><span class=\"citation-170 interactive-span-hovered\">Generally, the prepolymer and chain extender are metered from storage tanks and pumped into a mixing head<\/span><\/span><span data-path-to-node=\"21,4\">. <\/span><span data-path-to-node=\"21,6\"><span class=\"citation-169 interactive-span-hovered\">Once uniformly mixed, the liquid is injected into a mold where it undergoes polymerization and curing before finally being demolded<\/span><\/span><span data-path-to-node=\"21,8\">.<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-6338230 elementor-widget elementor-widget-heading\" data-id=\"6338230\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">From Railways to Aerospace: The Expanding Applications of CPU<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9fe5841 elementor-widget elementor-widget-text-editor\" data-id=\"9fe5841\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p><span data-path-to-node=\"23,1\"><span class=\"citation-168\">Because polyurethane elastomers exhibit outstanding resistance to wear, oil, tearing, chemical corrosion, and radiation\u2014coupled with excellent adhesion to other materials and superior shock absorption\u2014their application potential is limitless<\/span><\/span><span data-path-to-node=\"23,3\">:<\/span><\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-681c64d elementor-widget elementor-widget-text-editor\" data-id=\"681c64d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<ul><li><p data-path-to-node=\"24,0,1\"><span data-path-to-node=\"24,0,1,0\"><b data-path-to-node=\"24,0,1,0\" data-index-in-node=\"0\"><span class=\"citation-167 interactive-span-hovered\">Transportation and Railways:<\/span><\/b><span class=\"citation-167 interactive-span-hovered\"> This sector represents the largest consumption of PU abroad, utilizing the material for automotive bumpers, steering wheels, and dashboards<\/span><\/span><span data-path-to-node=\"24,0,1,2\">. <\/span><span data-path-to-node=\"24,0,1,4\"><span class=\"citation-166 interactive-span-hovered\">In railway infrastructure, it is critical for solid tires, marine fenders, locomotive fuel tank rings, and the heavy-duty shock-absorbing pads placed beneath train sleepers<\/span><\/span><span data-path-to-node=\"24,0,1,6\">.<\/span><\/p><\/li><li><p data-path-to-node=\"24,1,1\"><span data-path-to-node=\"24,1,1,0\"><b data-path-to-node=\"24,1,1,0\" data-index-in-node=\"0\"><span class=\"citation-165 interactive-span-hovered\">Heavy Machinery:<\/span><\/b><span class=\"citation-165 interactive-span-hovered\"> Polyurethane has become a key structural material in engineering machinery, widely used for oil-resistant, wear-resistant, and shock-absorbing seals<\/span><\/span><span data-path-to-node=\"24,1,1,2\">. <\/span><span data-path-to-node=\"24,1,1,4\"><span class=\"citation-164 interactive-span-hovered\">It is also essential for transmission belts, wear linings, steel pipe straightener trough liners, and steel-rolling rubber rollers<\/span><\/span><span data-path-to-node=\"24,1,1,6\">.<\/span><\/p><\/li><li><p data-path-to-node=\"24,2,1\"><span data-path-to-node=\"24,2,1,0\"><b data-path-to-node=\"24,2,1,0\" data-index-in-node=\"0\"><span class=\"citation-163 interactive-span-hovered\">Textiles and Sports:<\/span><\/b><span class=\"citation-163 interactive-span-hovered\"> In the textile industry, CPU is molded into spinning, printing, and grain processing rollers<\/span><\/span><span data-path-to-node=\"24,2,1,2\">. <\/span><span data-path-to-node=\"24,2,1,4\"><span class=\"citation-162 interactive-span-hovered\">In sports, it forms the foundation of PU running tracks, ski boot pulleys, and roller skate wheels<\/span><\/span><span data-path-to-node=\"24,2,1,6\">.<\/span><\/p><\/li><li><p id=\"p-rc_a14489cd4b5d079b-91\" data-path-to-node=\"24,3,1\"><span data-path-to-node=\"24,3,1,0\"><b data-path-to-node=\"24,3,1,0\" data-index-in-node=\"0\"><span class=\"citation-161 interactive-span-hovered\">Defense and Aerospace:<\/span><\/b><span class=\"citation-161 interactive-span-hovered\"> Thanks to its extreme resilience, CPU is deployed in military applications, including airtight artillery pads, armored vehicle bulletproof plates, and missile nose protective covers<\/span><\/span><span data-path-to-node=\"24,3,1,2\">.<\/span><\/p><\/li><\/ul>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-69d3aee elementor-widget elementor-widget-heading\" data-id=\"69d3aee\" data-element_type=\"widget\" data-widget_type=\"heading.default\">\n\t\t\t\t\t<h4 class=\"elementor-heading-title elementor-size-default\">Master the Pour with Precision Engineering<\/h4>\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-b1e46cb elementor-widget elementor-widget-text-editor\" data-id=\"b1e46cb\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t\t\t\t\t\t<p data-path-to-node=\"26\"><span data-path-to-node=\"26,0\">Understanding the chemistry of CPU is only the first step. <\/span><span data-path-to-node=\"26,2\"><span class=\"citation-160\">Executing the precise metering of prepolymers and chain extenders from the tanks to the mixing head <\/span><\/span><span data-path-to-node=\"26,4\"> requires absolute mechanical perfection.<\/span><\/p><p data-path-to-node=\"27\">Supported by a dedicated workforce of over 50 employees and a specialized subsidiary, <b data-path-to-node=\"27\" data-index-in-node=\"86\">Haifeng Polyurethane Machine<\/b> translates complex chemical reactions into highly profitable, automated production lines. As a globally recognized <b data-path-to-node=\"27\" data-index-in-node=\"230\">polyurethane machinery expert<\/b>, we engineer high-pressure and low-pressure elastomer casting equipment equipped with intelligent PLC closed-loop systems, guaranteeing perfect stoichiometric ratios and flawless dynamic mixing.<\/p><p data-path-to-node=\"28\">Acting as a comprehensive <b data-path-to-node=\"28\" data-index-in-node=\"26\">solution provider for the polyurethane field<\/b>, we are ready to elevate your manufacturing capabilities. Contact our engineering team today to architect the perfect CPU casting solution for your factory floor.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"featured_media":0,"template":"","meta":{"_acf_changed":false},"news-categories":[38],"class_list":["post-4629","news","type-news","status-publish","hentry","news-categories-technology-news"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Decoding &quot;Liquid Rubber&quot;: The Core DNA of Cast Polyurethane Elastomers - Zhejiang Haifeng Automation Equipment Co., Ltd.<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/haifengmachine.com\/ja\/news\/decoding-liquid-rubber-the-core-dna-of-cast-polyurethane-elastomers\/\" \/>\n<meta property=\"og:locale\" content=\"ja_JP\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Decoding &quot;Liquid Rubber&quot;: The Core DNA of Cast Polyurethane Elastomers - Zhejiang Haifeng Automation Equipment Co., Ltd.\" \/>\n<meta property=\"og:description\" content=\"Cast Polyurethane (CPU), widely known in the industry as &#8220;liquid rubber,&#8221; is an advanced product manufactured by pouring a liquid reaction mixture directly into a mold. 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The Chemical Matrix: 3 Core Raw Materials of CPU A top-tier CPU product relies on a rigorously engineered formulation consisting of three primary [&hellip;]\" \/>\n<meta property=\"og:url\" content=\"https:\/\/haifengmachine.com\/ja\/news\/decoding-liquid-rubber-the-core-dna-of-cast-polyurethane-elastomers\/\" \/>\n<meta property=\"og:site_name\" content=\"Zhejiang Haifeng Automation Equipment Co., Ltd.\" \/>\n<meta property=\"article:modified_time\" content=\"2026-04-02T14:44:29+00:00\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u63a8\u5b9a\u8aad\u307f\u53d6\u308a\u6642\u9593\" \/>\n\t<meta name=\"twitter:data1\" content=\"3\u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\\\/\\\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\\\/\\\/haifengmachine.com\\\/news\\\/decoding-liquid-rubber-the-core-dna-of-cast-polyurethane-elastomers\\\/\",\"url\":\"https:\\\/\\\/haifengmachine.com\\\/news\\\/decoding-liquid-rubber-the-core-dna-of-cast-polyurethane-elastomers\\\/\",\"name\":\"Decoding \\\"Liquid Rubber\\\": The Core DNA of Cast Polyurethane Elastomers - Zhejiang Haifeng Automation Equipment Co., Ltd.\",\"isPartOf\":{\"@id\":\"https:\\\/\\\/haifengmachine.com\\\/#website\"},\"datePublished\":\"2026-04-02T14:38:43+00:00\",\"dateModified\":\"2026-04-02T14:44:29+00:00\",\"breadcrumb\":{\"@id\":\"https:\\\/\\\/haifengmachine.com\\\/news\\\/decoding-liquid-rubber-the-core-dna-of-cast-polyurethane-elastomers\\\/#breadcrumb\"},\"inLanguage\":\"ja\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\\\/\\\/haifengmachine.com\\\/news\\\/decoding-liquid-rubber-the-core-dna-of-cast-polyurethane-elastomers\\\/\"]}]},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\\\/\\\/haifengmachine.com\\\/news\\\/decoding-liquid-rubber-the-core-dna-of-cast-polyurethane-elastomers\\\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Home\",\"item\":\"https:\\\/\\\/haifengmachine.com\\\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Decoding &#8220;Liquid Rubber&#8221;: The Core DNA of Cast Polyurethane Elastomers\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\\\/\\\/haifengmachine.com\\\/#website\",\"url\":\"https:\\\/\\\/haifengmachine.com\\\/\",\"name\":\"Zhejiang Haifeng Automation Equipment Co., Ltd.\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\\\/\\\/haifengmachine.com\\\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\\\/\\\/haifengmachine.com\\\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"ja\"},{\"@type\":\"Organization\",\"@id\":\"https:\\\/\\\/haifengmachine.com\\\/#organization\",\"name\":\"Zhejiang Haifeng Automation Equipment Co., Ltd.\",\"url\":\"https:\\\/\\\/haifengmachine.com\\\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"ja\",\"@id\":\"https:\\\/\\\/haifengmachine.com\\\/#\\\/schema\\\/logo\\\/image\\\/\",\"url\":\"https:\\\/\\\/haifengmachine.com\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/logo.png\",\"contentUrl\":\"https:\\\/\\\/haifengmachine.com\\\/wp-content\\\/uploads\\\/2025\\\/12\\\/logo.png\",\"width\":178,\"height\":55,\"caption\":\"Zhejiang Haifeng Automation Equipment Co., Ltd.\"},\"image\":{\"@id\":\"https:\\\/\\\/haifengmachine.com\\\/#\\\/schema\\\/logo\\\/image\\\/\"}}]}<\/script>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"Decoding \"Liquid Rubber\": The Core DNA of Cast Polyurethane Elastomers - Zhejiang Haifeng Automation Equipment Co., Ltd.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/haifengmachine.com\/ja\/news\/decoding-liquid-rubber-the-core-dna-of-cast-polyurethane-elastomers\/","og_locale":"ja_JP","og_type":"article","og_title":"Decoding \"Liquid Rubber\": The Core DNA of Cast Polyurethane Elastomers - Zhejiang Haifeng Automation Equipment Co., Ltd.","og_description":"Cast Polyurethane (CPU), widely known in the industry as &#8220;liquid rubber,&#8221; is an advanced product manufactured by pouring a liquid reaction mixture directly into a mold. 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