{"id":1533,"date":"2026-07-29T07:33:07","date_gmt":"2026-07-29T07:33:07","guid":{"rendered":"https:\/\/www.packtests.com\/?post_type=standard&#038;p=1533"},"modified":"2026-07-29T07:33:08","modified_gmt":"2026-07-29T07:33:08","slug":"jis-z-0238","status":"publish","type":"standard","link":"https:\/\/www.packtests.com\/it\/standard\/jis-z-0238\/","title":{"rendered":"JIS Z 0238"},"content":{"rendered":"<p class=\"wp-block-paragraph\">Packaging failure often begins with an inconsistent seal rather than a weak material. <strong>JIS Z 0238<\/strong> provides a recognized framework for evaluating heat sealing performance under controlled laboratory conditions, helping manufacturers determine the optimum sealing parameters before production starts. Whether developing new flexible packaging structures or validating production consistency, <strong>JIS Z 0238<\/strong> testing enables engineers to establish reliable sealing windows and improve package integrity.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Il <strong>HST Series Heat Seal Tester<\/strong> from Cell Instruments is designed for accurate laboratory evaluation of thermoplastic sealing materials. By precisely controlling sealing temperature, dwell time, and sealing pressure, the instrument produces repeatable seals for subsequent strength evaluation. It is widely used as a <strong>tester per sigillatura a caldo<\/strong> e <strong>laboratory heat sealer<\/strong> for research, quality control, and production optimization involving the <strong>resistenza alla termosaldatura dei film plastici<\/strong> and multilayer flexible packaging.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">What Is JIS Z 0238?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>JIS Z 0238<\/strong> is a Japanese industrial standard that specifies laboratory methods for producing heat seals under controlled conditions. The standard focuses on establishing repeatable sealing conditions so that packaging materials can be evaluated consistently.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Instead of measuring seal strength directly, <strong>JIS Z 0238<\/strong> defines how heat seals should be prepared. The sealed specimens are then commonly tested using tensile testing methods to determine seal strength and identify the optimum sealing conditions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Manufacturers use <strong>JIS Z 0238<\/strong> to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Determine the optimal sealing temperature range<\/li>\n\n\n\n<li>Compare different sealing layers<\/li>\n\n\n\n<li>Evaluate new packaging materials<\/li>\n\n\n\n<li>Optimize production sealing parameters<\/li>\n\n\n\n<li>Improve package reliability before commercial manufacturing<\/li>\n<\/ul>\n\n\n\n<figure class=\"wp-block-image size-full is-resized\"><a href=\"https:\/\/www.packtests.com\/it\/product-category\/heat-seal-strength-test\/\" target=\"_blank\" rel=\" noreferrer noopener\"><img fetchpriority=\"high\" decoding=\"async\" width=\"600\" height=\"600\" src=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/07\/JIS-Z-0238\u4e28Heat-Seal-Tester-for-Plastic-Film.webp\" alt=\"JIS Z 0238 | Tester di termosaldabilit\u00e0 per film plastici\" class=\"wp-image-1535\" style=\"width:337px;height:auto\" title=\"\" srcset=\"https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/07\/JIS-Z-0238\u4e28Heat-Seal-Tester-for-Plastic-Film.webp 600w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/07\/JIS-Z-0238\u4e28Heat-Seal-Tester-for-Plastic-Film-300x300.webp 300w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/07\/JIS-Z-0238\u4e28Heat-Seal-Tester-for-Plastic-Film-150x150.webp 150w, https:\/\/www.packtests.com\/wp-content\/uploads\/2026\/07\/JIS-Z-0238\u4e28Heat-Seal-Tester-for-Plastic-Film-12x12.webp 12w\" sizes=\"(max-width: 600px) 100vw, 600px\" \/><\/a><\/figure>\n\n\n\n<h2 class=\"wp-block-heading\">Why Is Heat Seal Testing Important?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The sealing layer is one of the most critical components of flexible packaging. Even high-performance barrier films cannot protect a product if the seal fails during transportation or storage.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A controlled <strong>tester per sigillatura a caldo<\/strong> helps manufacturers understand how packaging materials respond to different sealing conditions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Major benefits include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Improved package integrity<\/li>\n\n\n\n<li>Reduced seal failures during production<\/li>\n\n\n\n<li>Better shelf-life protection<\/li>\n\n\n\n<li>Lower material waste<\/li>\n\n\n\n<li>Faster material qualification<\/li>\n\n\n\n<li>More consistent production quality<\/li>\n\n\n\n<li>Support for customer and regulatory requirements<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Verifica del <strong>resistenza alla termosaldatura dei film plastici<\/strong> also allows engineers to compare different film structures, adhesives, coatings, and sealing resins before selecting materials for mass production.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">How Does a Heat Sealer Work?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">A <strong>laboratory heat sealer<\/strong> recreates production sealing conditions while allowing each parameter to be adjusted independently.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The typical testing process includes:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Temperature Stabilization<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Upper and lower sealing jaws are heated until the preset temperature reaches a stable condition.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Preparazione dei campioni<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Film specimens, laminates, or sealing materials are positioned evenly between the heated sealing jaws.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Controlled Sealing Pressure<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">The system applies a predefined sealing pressure to ensure uniform contact across the sealing surface.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Timed Heat Application<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Heat and pressure remain constant for the programmed dwell time, allowing the seal layer to melt and bond correctly.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Rimozione del campione<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">After the sealing cycle ends, the jaws separate automatically and the sealed specimen is removed for further evaluation, such as peel testing or tensile testing.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Because every variable remains controlled, the resulting seals can be compared objectively across different materials and sealing conditions.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">HST Series Heat Seal Tester<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The HST Series is a compact laboratory instrument developed for precise seal preparation in accordance with <strong>JIS Z 0238<\/strong> and other international testing practices.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">It accurately controls three essential sealing variables:<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th class=\"has-text-align-center\" data-align=\"center\">Parametro<\/th><th class=\"has-text-align-center\" data-align=\"center\">Specifiche tecniche<\/th><\/tr><\/thead><tbody><tr><td class=\"has-text-align-center\" data-align=\"center\">Temperature Range<\/td><td class=\"has-text-align-center\" data-align=\"center\">Da temperatura ambiente a 300 \u00b0C<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Precisione della temperatura<\/td><td class=\"has-text-align-center\" data-align=\"center\">\u00b10,2 \u00b0C<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Tempo di sigillatura<\/td><td class=\"has-text-align-center\" data-align=\"center\">0,1\u20139999 s<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Pressione di tenuta<\/td><td class=\"has-text-align-center\" data-align=\"center\">0,15\u20130,7 MPa<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Dimensioni della ganascia di tenuta<\/td><td class=\"has-text-align-center\" data-align=\"center\">330 \u00d7 10 mm<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Air Supply<\/td><td class=\"has-text-align-center\" data-align=\"center\">0,7 MPa<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Air Port<\/td><td class=\"has-text-align-center\" data-align=\"center\">Tubo in PU da \u03a66 mm<\/td><\/tr><tr><td class=\"has-text-align-center\" data-align=\"center\">Alimentazione<\/td><td class=\"has-text-align-center\" data-align=\"center\">220 V CA, 50 Hz<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">The instrument delivers highly repeatable sealing conditions, making it suitable for laboratory research, incoming material inspection, and production quality verification.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Two Models Available for Different Laboratory Requirements<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">To accommodate different laboratory workflows, the HST Series is available in two configurations while maintaining identical sealing performance.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">HST-01 Touchscreen Heat Seal Tester<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Il <strong>HST-01<\/strong> features an intuitive color touchscreen interface for convenient parameter setting and operation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Features include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Full touchscreen operation<\/li>\n\n\n\n<li>Inserimento digitale dei parametri<\/li>\n\n\n\n<li>Precise temperature control<\/li>\n\n\n\n<li>Programmable sealing time<\/li>\n\n\n\n<li>Pneumatic pressure application<\/li>\n\n\n\n<li>Excellent repeatability for laboratory testing<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This model is recommended for laboratories that perform frequent testing or require rapid parameter adjustments during material development.<\/p>\n\n\n\n<h3 class=\"wp-block-heading\">HST-02 Manual Button Heat Seal Tester<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">Il <strong>HST-02<\/strong> provides the same sealing accuracy using a traditional push-button control panel.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Features include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Manual button operation<\/li>\n\n\n\n<li>Stable temperature regulation<\/li>\n\n\n\n<li>Identical sealing performance<\/li>\n\n\n\n<li>Pneumatic sealing system<\/li>\n\n\n\n<li>Durable mechanical controls<\/li>\n\n\n\n<li>Cost-effective laboratory solution<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The HST-02 is ideal for routine quality control laboratories that prefer straightforward operation while maintaining compliance with <strong>JIS Z 0238<\/strong>.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Typical Materials Evaluated<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">The HST Series supports evaluation of numerous heat-sealable materials, including:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Polietilene (PE)<\/li>\n\n\n\n<li>Polipropilene (PP)<\/li>\n\n\n\n<li>PET laminated films<\/li>\n\n\n\n<li>Nylon composite films<\/li>\n\n\n\n<li>Laminati in foglio di alluminio<\/li>\n\n\n\n<li>Coextruded barrier films<\/li>\n\n\n\n<li>Pellicole per imballaggi medicali<\/li>\n\n\n\n<li>Pharmaceutical blister materials<\/li>\n\n\n\n<li>Laminati carta-plastica<\/li>\n\n\n\n<li>Composite flexible packaging<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The instrument is especially useful for determining the <strong>resistenza alla termosaldatura dei film plastici<\/strong> used in food, pharmaceutical, and industrial packaging.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Typical Applications Across Industries<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Many industries rely on <strong>JIS Z 0238<\/strong> testing during product development and quality assurance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tra le applicazioni tipiche figurano:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Flexible food packaging<\/li>\n\n\n\n<li>Medical pouch manufacturing<\/li>\n\n\n\n<li>Confezionamento farmaceutico<\/li>\n\n\n\n<li>Retort pouch development<\/li>\n\n\n\n<li>Confezionamento sottovuoto<\/li>\n\n\n\n<li>Stand-up pouch production<\/li>\n\n\n\n<li>Confezionamento di alimenti surgelati<\/li>\n\n\n\n<li>Confezionamento di bevande<\/li>\n\n\n\n<li>Agricultural chemical packaging<\/li>\n\n\n\n<li>Consumer goods packaging<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">For R&amp;D teams, the <strong>laboratory heat sealer<\/strong> provides repeatable sealing samples for process optimization. For quality engineers, it verifies whether production materials continue to meet sealing performance requirements.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Related Test Standards<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Sebbene <strong>JIS Z 0238<\/strong> defines seal preparation procedures, complete seal evaluation often combines multiple standards.<\/p>\n\n\n\n<figure class=\"wp-block-table\"><table class=\"has-fixed-layout\"><thead><tr><th>Standard<\/th><th>Finalit\u00e0<\/th><\/tr><\/thead><tbody><tr><td>JIS Z 0238<\/td><td>Laboratory heat seal preparation<\/td><\/tr><tr><td>ASTM F2029<\/td><td>Heat sealability of flexible barrier materials<\/td><\/tr><tr><td>YBB 001220<\/td><td>Pharmaceutical packaging heat sealing<\/td><\/tr><tr><td>ASTM F88<\/td><td>Seal strength measurement<\/td><\/tr><tr><td>ASTM D882<\/td><td>Tensile properties of plastic films<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Using these standards together provides a comprehensive understanding of sealing quality, process capability, and package performance.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\">Perch\u00e9 scegliere Cell Instruments?<\/h2>\n\n\n\n<p class=\"wp-block-paragraph\">Cell Instruments has extensive experience in laboratory testing solutions for packaging materials and mechanical property evaluation.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Our capabilities include:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Standard laboratory testing instruments<\/li>\n\n\n\n<li>Dispositivi di fissaggio personalizzati<\/li>\n\n\n\n<li>Sistemi di collaudo multistazione<\/li>\n\n\n\n<li>Integrated testing solutions<\/li>\n\n\n\n<li>Technical application support<\/li>\n\n\n\n<li>Global customer service<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">Beyond supplying a <a href=\"https:\/\/www.packtests.com\/it\/product\/heat-seal-tester\/\" target=\"_blank\" rel=\"noreferrer noopener\">tester per sigillatura a caldo<\/a>, we assist customers in selecting suitable testing methods for packaging development, process validation, and quality assurance.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Whether you are evaluating new sealant materials, optimizing production parameters, or verifying compliance with <a href=\"https:\/\/webstore.ansi.org\/standards\/jis\/jis02381998?srsltid=AfmBOooDeQXMnIAalpdybk4EVery2xHNF9ZT2aJNi1GAeE-wV2uezFp6\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">JIS Z 0238<\/a>, the HST Series provides consistent and repeatable laboratory sealing performance that supports confident engineering decisions.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>","protected":false},"excerpt":{"rendered":"<p>Packaging failure often begins with an inconsistent seal rather than a weak material. JIS Z 0238 provides a recognized framework for evaluating heat sealing performance under controlled laboratory conditions, helping manufacturers determine the optimum sealing parameters before production starts. Whether developing new flexible packaging structures or validating production consistency, JIS Z 0238 testing enables engineers [&hellip;]<\/p>","protected":false},"featured_media":1535,"parent":0,"template":"","meta":{"_acf_changed":false},"standard-category":[70],"class_list":["post-1533","standard","type-standard","status-publish","has-post-thumbnail","hentry","standard-category-jis"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.packtests.com\/it\/wp-json\/wp\/v2\/standard\/1533","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.packtests.com\/it\/wp-json\/wp\/v2\/standard"}],"about":[{"href":"https:\/\/www.packtests.com\/it\/wp-json\/wp\/v2\/types\/standard"}],"version-history":[{"count":5,"href":"https:\/\/www.packtests.com\/it\/wp-json\/wp\/v2\/standard\/1533\/revisions"}],"predecessor-version":[{"id":1678,"href":"https:\/\/www.packtests.com\/it\/wp-json\/wp\/v2\/standard\/1533\/revisions\/1678"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.packtests.com\/it\/wp-json\/wp\/v2\/media\/1535"}],"wp:attachment":[{"href":"https:\/\/www.packtests.com\/it\/wp-json\/wp\/v2\/media?parent=1533"}],"wp:term":[{"taxonomy":"standard-category","embeddable":true,"href":"https:\/\/www.packtests.com\/it\/wp-json\/wp\/v2\/standard-category?post=1533"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}