{"id":9468,"date":"2025-05-23T02:30:25","date_gmt":"2025-05-23T02:30:25","guid":{"rendered":"https:\/\/shop.damao-tech.com\/?p=9468"},"modified":"2026-02-09T02:44:34","modified_gmt":"2026-02-09T02:44:34","slug":"%e3%82%a8%e3%83%90%e3%83%95%e3%82%a9%e3%83%bc%e3%83%a0%e3%81%ae%e5%af%86%e5%ba%a6%e3%80%81%e7%a1%ac%e5%ba%a6%e3%80%81-shore-a%e3%80%81c%e3%81%ae%e7%90%86%e8%a7%a3%e8%aa%ac%e6%98%8e","status":"publish","type":"post","link":"https:\/\/shop.damao-tech.com\/ja\/2025\/05\/23\/%e3%82%a8%e3%83%90%e3%83%95%e3%82%a9%e3%83%bc%e3%83%a0%e3%81%ae%e5%af%86%e5%ba%a6%e3%80%81%e7%a1%ac%e5%ba%a6%e3%80%81-shore-a%e3%80%81c%e3%81%ae%e7%90%86%e8%a7%a3%e8%aa%ac%e6%98%8e\/","title":{"rendered":"EVA\u30d5\u30a9\u30fc\u30e0\u306e\u5bc6\u5ea6\u3068\u786c\u5ea6\u306e\u7406\u89e3\uff1aShore A\/C\u306e\u8aac\u660e"},"content":{"rendered":"<!-- Font Awesome Icons -->\n<link rel=\"stylesheet\" href=\"https:\/\/cdnjs.cloudflare.com\/ajax\/libs\/font-awesome\/6.4.0\/css\/all.min.css\">\n\n<style>\n.damao-clean-layout {\n    color: #333;\n    margin: 0 auto;\n}\n.damao-clean-layout h1 {\n    border-left: 6px solid #4d94e7;\n    padding-left: 15px;\n    margin-bottom: 30px;\n}\n.damao-clean-layout h2 {\n    border-bottom: 1px solid #eee;\n    padding-bottom: 8px;\n    margin-top: 40px;\n    color: #2c3e50;\n}\n.inline-link {\n    color: #4d94e7;\n    text-decoration: none;\n    font-weight: 600;\n}\n.inline-link:hover { text-decoration: underline; }\n\n.summary-note {\n    background-color: #f9f9f9;\n    border: 1px solid #4d94e7;\n    padding: 20px;\n    border-radius: 8px;\n    margin: 25px 0;\n}\n\n.spec-grid {\n    display: grid;\n    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));\n    gap: 20px;\n    margin: 25px 0;\n}\n.spec-card {\n    border: 1px solid #eee;\n    padding: 20px;\n    border-radius: 8px;\n}\n.spec-card i {\n    color: #4d94e7;\n    margin-right: 8px;\n}\n\n.table-container {\n    overflow-x: auto;\n    margin: 25px 0;\n}\n.custom-table {\n    width: 100%;\n    border-collapse: collapse;\n}\n.custom-table th,\n.custom-table td {\n    padding: 12px;\n    border: 1px solid #ddd;\n}\n.custom-table th {\n    background-color: #f4f7f9;\n}\n\n.faq-section { margin-top: 30px; }\n.faq-q {\n    font-weight: bold;\n    display: block;\n    margin-top: 15px;\n    color: #4d94e7;\n}\n\n.cta-simple-box {\n    background-color: #2c3e50;\n    color: #ffffff;\n    padding: 40px 20px;\n    text-align: center;\n    border-radius: 8px;\n    margin-top: 50px;\n}\n.cta-simple-box h2 { color: #fff; border: none; margin-top: 0; }\n.cta-btn {\n    display: inline-block;\n    background-color: #4d94e7;\n    color: #fff !important;\n    padding: 12px 35px;\n    border-radius: 4px;\n    text-decoration: none;\n    font-weight: bold;\n    margin-top: 20px;\n}\n<\/style>\n\n<div class=\"damao-clean-layout\">\n\n<h1>EVA Foam Density &amp; Hardness Guide: Shore A vs Shore C Explained<\/h1>\n\n<p>\nSelecting the correct EVA foam is not simply a matter of softness or thickness.\nIn industrial manufacturing, footwear development, marine applications, and protective packaging,\n<strong>density<\/strong> \u71b1\u53ef\u5851\u6027\u30dd\u30ea\u30a6\u30ec\u30bf\u30f3\uff08TPU\uff09\u3067\u3059\u3002 <strong>Shore hardness<\/strong> directly affect durability, energy return, machinability, and service life.\n<\/p>\n\n<p>\nAt Damao Tech, we manufacture <a href=\"https:\/\/shop.damao-tech.com\/ja\/%e3%82%a8%e3%83%90%e3%83%95%e3%82%a9%e3%83%bc%e3%83%a0\/\" class=\"inline-link\">EVA foam sheets and rolls<\/a>\nwith tightly controlled density and hardness ranges to support precise engineering requirements.\n<\/p>\n\n<div class=\"summary-note\">\n<strong><i class=\"fa-solid fa-circle-info\"><\/i> Engineering Note:<\/strong><br>\nDensity and Shore hardness are correlated but fundamentally different parameters.\nDensity primarily affects weight, compression resistance, and structural stability,\nwhile Shore hardness measures surface resistance to indentation under a standardized load.\n<\/div>\n\n<h2>1. EVA Foam Density Classification (kg\/m\u00b3)<\/h2>\n\n<p>\nDensity determines how much material mass exists per unit volume.\nHigher-density EVA generally provides better load-bearing capacity, dimensional stability,\nand abrasion resistance, while lower-density foam prioritizes cushioning and weight reduction.\n<\/p>\n\n<div class=\"spec-grid\">\n<div class=\"spec-card\">\n<h4><i class=\"fa-solid fa-feather-pointed\"><\/i> Low Density (33\u201380 kg\/m\u00b3)<\/h4>\n<p>\nUsed for yoga mats, soft protective packaging, flotation inserts, and comfort-focused cushioning\nwhere low weight and compressibility are critical.\n<\/p>\n<\/div>\n\n<div class=\"spec-card\">\n<h4><i class=\"fa-solid fa-box-open\"><\/i> Medium Density (80\u2013150 kg\/m\u00b3)<\/h4>\n<p>\nThe most common range for athletic footwear midsoles, orthotic components,\nsports equipment padding, and general-purpose industrial foam parts.\n<\/p>\n<\/div>\n\n<div class=\"spec-card\">\n<h4><i class=\"fa-solid fa-anchor\"><\/i> High Density (150\u2013280 kg\/m\u00b3)<\/h4>\n<p>\nPreferred for marine decking, industrial gaskets, tool control foam,\nand applications requiring higher stiffness, wear resistance, and shape retention.\n<\/p>\n<\/div>\n<\/div>\n\n<h2>2. EVA Foam Hardness Testing Standards (Shore A &amp; Shore C)<\/h2>\n\n<p>\nEVA foam hardness is commonly measured using <strong>ASTM D2240<\/strong>.\nDue to EVA\u2019s cellular structure, different Shore scales are used depending on formulation and industry.\n<\/p>\n\n<ul>\n<li><strong>Shore C:<\/strong> Common in footwear, sports, and foam-specific industries<\/li>\n<li><strong>Shore A:<\/strong> Used when comparing EVA to rubber or elastomer components<\/li>\n<\/ul>\n\n<p>\nBecause Shore A and Shore C use different indenters and spring forces,\n<strong>there is no exact mathematical conversion<\/strong> between the two scales.\nThe table below reflects commonly observed industry reference ranges.\n<\/p>\n\n<div class=\"table-container\">\n<table class=\"custom-table\">\n<thead>\n<tr>\n<th>Shore C (EVA Foam)<\/th>\n<th>Approx. Shore A<\/th>\n<th>\u5178\u578b\u7684\u306a\u9069\u7528\u4f8b<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>15 \u2013 25 \u2103<\/td>\n<td>5 \u2013 10 A<\/td>\n<td>\u30a8\u30af\u30b9\u30c8\u30e9\u30bd\u30d5\u30c8\u30af\u30c3\u30b7\u30e7\u30f3\u3001\u6cbb\u7642\u7528\u30a4\u30f3\u30bd\u30fc\u30eb<\/td>\n<\/tr>\n<tr>\n<td>35 \u2013 45 \u2103<\/td>\n<td>20 \u2013 25 A<\/td>\n<td>\u6a19\u6e96\u7684\u306a\u30a2\u30b9\u30ea\u30fc\u30c8\u30df\u30c3\u30c9\u30bd\u30fc\u30eb\u3001\u885d\u6483\u5438\u53ce\u30d1\u30c3\u30c9<\/td>\n<\/tr>\n<tr>\n<td>55 \u2013 65 \u2103<\/td>\n<td>35 \u2013 45 A<\/td>\n<td>\u6d77\u4e0a\u30c7\u30c3\u30ad\u3001\u30c4\u30fc\u30eb\u30b3\u30f3\u30c8\u30ed\u30fc\u30eb\u30d5\u30a9\u30fc\u30e0\u3001\u4fdd\u8b77\u30d1\u30cd\u30eb<\/td>\n<\/tr>\n<tr>\n<td>75 \u2013 85 \u2103<\/td>\n<td>55 \u2013 70 A<\/td>\n<td>\u525b\u6027\u306e\u5de5\u696d\u90e8\u54c1\u3001\u69cb\u9020\u7528\u30d5\u30a9\u30fc\u30e0\u30b3\u30f3\u30dd\u30fc\u30cd\u30f3\u30c8<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n\n<div class=\"summary-note\">\n<strong>\u91cd\u8981\u306a\u514d\u8cac\u4e8b\u9805:<\/strong><br>\n\u4e0a\u8a18\u306eShore A\u304a\u3088\u3073Shore C\u5024\u306f\u3001\u4e00\u822c\u7684\u306aEVA\u30d5\u30a9\u30fc\u30e0\u306e\u914d\u5408\u306b\u57fa\u3065\u304f\u63a8\u5b9a\u306e\u53c2\u8003\u7bc4\u56f2\u3067\u3059\u3002\n\u5b9f\u969b\u306e\u30c6\u30b9\u30c8\u7d50\u679c\u306f\u3001\u5bc6\u5ea6\u3001\u62e1\u5f35\u7387\u3001\u7d30\u80de\u69cb\u9020\u3001\u304a\u3088\u3073\u30c6\u30b9\u30c8\u6761\u4ef6\u306b\u3088\u3063\u3066\u7570\u306a\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002\n\u5e38\u306b\u7269\u7406\u30b5\u30f3\u30d7\u30eb\u3067\u7d20\u6750\u4ed5\u69d8\u3092\u78ba\u8a8d\u3057\u3066\u304f\u3060\u3055\u3044\u3002.\n<\/div>\n\n<h2>3. \u5de5\u5b66\u8005\u304c\u9078\u629e\u3059\u308bEVA\u30d5\u30a9\u30fc\u30e0\uff1a\u5b9f\u8df5\u7684\u306a\u8ad6\u7406<\/h2>\n\n<p>\n\u5bc6\u5ea6\u3084\u786c\u5ea6\u3092\u5358\u72ec\u3067\u9078\u629e\u3059\u308b\u4ee3\u308f\u308a\u306b\u3001\n\u5de5\u5b66\u8005\u306f\u6a5f\u80fd\u8981\u4ef6\u304b\u3089\u9006\u7b97\u3057\u3066\u4f5c\u696d\u3057\u307e\u3059\uff1a\n<\/p>\n\n<ul>\n<li><strong>\u30af\u30c3\u30b7\u30e7\u30f3\u6027\u3084\u30a8\u30cd\u30eb\u30ae\u30fc\u5438\u53ce\u306b\u7126\u70b9\u3092\u5f53\u3066\u307e\u3059\u304b\uff1f<\/strong><br>\n\u2192 Shore C\u7bc4\u56f2\u304b\u3089\u59cb\u3081\u3001\u8010\u4e45\u6027\u306e\u305f\u3081\u306b\u5bc6\u5ea6\u3092\u8abf\u6574\u3057\u307e\u3059\u3002.<\/li>\n\n<li><strong>\u5bf8\u6cd5\u5b89\u5b9a\u6027\u3084\u52a0\u5de5\u306b\u61f8\u5ff5\u304c\u3042\u308a\u307e\u3059\u304b\uff1f<\/strong><br>\n\u2192 \u5bc6\u5ea6\u304b\u3089\u59cb\u3081\u3001\u786c\u5ea6\u3092\u5fae\u8abf\u6574\u3057\u307e\u3059\u3002.<\/li>\n\n<li><strong>\u30d2\u30fc\u30c8\u30d5\u30a9\u30fc\u30df\u30f3\u30b0\u3084\u30c6\u30fc\u30e2\u30e2olding\u304c\u5fc5\u8981\u3067\u3059\u304b\uff1f<\/strong><br>\n\u2192 \u4e2d\u304b\u3089\u9ad8\u5bc6\u5ea6\u3067\u9069\u5ea6\u306aShore C\u304c\u30a8\u30c3\u30b8\u306e\u5b9a\u7fa9\u3092\u6539\u5584\u3057\u307e\u3059\u3002.<\/li>\n\n<li><strong>\u5c4b\u5916\u3084\u6d77\u4e0a\u306e\u9732\u51fa\uff1f<\/strong><br>\n\u2192 \u8010\u6469\u8017\u6027\u3068\u30b0\u30ea\u30c3\u30d7\u6027\u306e\u305f\u3081\u3001\u9ad8\u5bc6\u5ea6\u3068\u4e2d\u304b\u3089\u9ad8Shore C\u304c\u6c42\u3081\u3089\u308c\u307e\u3059\u3002.<\/li>\n<\/ul>\n\n<h2>4. \u6a5f\u7a2e\u5225\u306e\u4ed5\u69d8\u53c2\u7167<\/h2>\n\n<ul>\n<li><strong>\u9774\uff1a<\/strong> \u4f4e\u304b\u3089\u4e2d\u5bc6\u5ea6\u300120\u201335 Shore C\u3067\u5feb\u9069\u3055\u3068\u53cd\u767a\u6027<\/li>\n<li><strong>\u6d77\u4e0a\uff1a<\/strong> \u9ad8\u5bc6\u5ea6\u300160\u201365 Shore C\u3067UV\u8010\u4e45\u6027\u3068\u9632\u6ed1\u6027\u80fd<\/li>\n<li><strong>\u30b3\u30b9\u30d7\u30ec\uff06\u30d7\u30ed\u30c3\u30d7\u30b9:<\/strong> \u4e2d\u304b\u3089\u9ad8\u5bc6\u5ea6\u300145\u201370 Shore C\u3067\u71b1\u5f62\u6210\u3068\u8010\u4e45\u6027<\/li>\n<li><strong>\u4fdd\u8b77\u5305\u88c5\uff1a<\/strong> \u4f4e\u5bc6\u5ea6\u300135\u201345 Shore C \u3067\u885d\u6483\u5438\u53ce<\/li>\n<\/ul>\n\n<h2>5.\u3088\u304f\u3042\u308b\u8cea\u554f<\/h2>\n\n<div class=\"faq-section\">\n<span class=\"faq-q\">Q: \u5bc6\u5ea6\u3068\u786c\u5ea6\u306f\u305d\u308c\u305e\u308c\u72ec\u7acb\u306b\u30ab\u30b9\u30bf\u30de\u30a4\u30ba\u3067\u304d\u307e\u3059\u304b\uff1f<\/span>\n<p>\n\u306f\u3044\u3002\u914d\u5408\u3068\u62e1\u5f35\u7387\u3092\u8abf\u6574\u3059\u308b\u3053\u3068\u3067\u3001\u7570\u306a\u308b\u5bc6\u5ea6\u7bc4\u56f2\u5185\u3067\u7279\u5b9a\u306eShore\u786c\u5ea6\u30ec\u30d9\u30eb\u3092\u9054\u6210\u3067\u304d\u307e\u3059\u3002\u5b9f\u7528\u7684\u306a\u9650\u754c\u5185\u3067\u306e\u3053\u3068\u3067\u3059\u3002.\n<\/p>\n\n<span class=\"faq-q\">Q: \u6280\u8853\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8\u3068\u30b5\u30f3\u30d7\u30eb\u3092\u63d0\u4f9b\u3057\u3066\u3044\u305f\u3060\u3051\u307e\u3059\u304b\uff1f<\/span>\n<p>\n\u306f\u3044\u3002\u91cd\u8981\u306a\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u306b\u306f\u5f37\u304f\u63a8\u5968\u3057\u307e\u3059\u304c\u3001\u7d20\u6750\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8\u3068\u7269\u7406\u7684\u306a\u30b5\u30f3\u30d7\u30eb\u3092\u63d0\u4f9b\u3057\u3066\u3044\u307e\u3059\u3002.\n<\/p>\n<\/div>\n\n<div class=\"cta-simple-box\">\n<h2>\u30a8\u30f3\u30b8\u30cb\u30a2\u30ea\u30f3\u30b0\u30ec\u30d9\u30eb\u306eEVA\u30d5\u30a9\u30fc\u30e0\u30b5\u30dd\u30fc\u30c8\u304c\u5fc5\u8981\u3067\u3059\u304b\uff1f<\/h2>\n<p>\n\u6280\u8853\u30c7\u30fc\u30bf\u30b7\u30fc\u30c8\u3001Shore\u786c\u5ea6\u30b5\u30f3\u30d7\u30eb\u3001\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u56fa\u6709\u306e\u63a8\u5968\u304b\u3089\u3001\u79c1\u305f\u3061\u306e\u7d20\u6750\u30c1\u30fc\u30e0\u306b\u3054\u4f9d\u983c\u304f\u3060\u3055\u3044\u3002.\n<\/p>\n<a href=\"https:\/\/shop.damao-tech.com\/ja\/%e9%80%a3%e7%b5%a1%e5%85%88\/\" class=\"cta-btn\">\u6280\u8853\u30b5\u30dd\u30fc\u30c8\u306e\u3054\u9023\u7d61\u5148\u306f\u3053\u3061\u3089<\/a>\n<\/div>\n\n<\/div>","protected":false},"excerpt":{"rendered":"<p>EVA Foam Density &#038; Hardness Guide: Shore A vs Shore C Explained Selecting the correct EVA foam is not simply a matter of softness or thickness. In industrial manufacturing, footwear development, marine applications, and protective packaging, density and Shore hardness directly affect durability, energy return, machinability, and service life. At Damao Tech, we manufacture EVA foam sheets and rolls with tightly controlled density and hardness ranges to support precise engineering requirements. Engineering Note: Density and Shore hardness are correlated but fundamentally different parameters. Density primarily affects weight, compression resistance, and structural stability, while Shore hardness measures surface resistance to indentation under a standardized load. 1. EVA Foam Density Classification (kg\/m\u00b3) [&#8230;]\n","protected":false},"author":1,"featured_media":9471,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[624],"tags":[655,678,707,709,664,662],"class_list":["post-9468","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-eva-material","tag-custom-eva-foam","tag-eva-foam-density","tag-eva-foam-hardness","tag-eva-foam-performance","tag-eva-foam-rolls","tag-eva-foam-sheets"],"_links":{"self":[{"href":"https:\/\/shop.damao-tech.com\/ja\/wp-json\/wp\/v2\/posts\/9468","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/shop.damao-tech.com\/ja\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/shop.damao-tech.com\/ja\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/shop.damao-tech.com\/ja\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/shop.damao-tech.com\/ja\/wp-json\/wp\/v2\/comments?post=9468"}],"version-history":[{"count":0,"href":"https:\/\/shop.damao-tech.com\/ja\/wp-json\/wp\/v2\/posts\/9468\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/shop.damao-tech.com\/ja\/wp-json\/wp\/v2\/media\/9471"}],"wp:attachment":[{"href":"https:\/\/shop.damao-tech.com\/ja\/wp-json\/wp\/v2\/media?parent=9468"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/shop.damao-tech.com\/ja\/wp-json\/wp\/v2\/categories?post=9468"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/shop.damao-tech.com\/ja\/wp-json\/wp\/v2\/tags?post=9468"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}