{"id":5005,"date":"2021-12-20T08:19:11","date_gmt":"2021-12-20T08:19:11","guid":{"rendered":"https:\/\/www.plasticpackingbags.com\/?p=5005"},"modified":"2021-12-20T08:22:46","modified_gmt":"2021-12-20T08:22:46","slug":"why-does-pvc-heat-shrink-film-shrink-when-heated","status":"publish","type":"post","link":"https:\/\/www.plasticpackingbags.com\/why-does-pvc-heat-shrink-film-shrink-when-heated\/","title":{"rendered":"Why does pvc heat shrink film shrink when heated?"},"content":{"rendered":"<div style=\"margin-top: 0px; margin-bottom: 0px;\" class=\"sharethis-inline-share-buttons\" ><\/div>\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"5005\" class=\"elementor elementor-5005\">\n\t\t\t\t\t\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-5d77e890 elementor-hidden-tablet elementor-hidden-phone elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"5d77e890\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-100 elementor-top-column elementor-element elementor-element-82a2347\" data-id=\"82a2347\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7ee8a6b4 elementor-align-left elementor-widget elementor-widget-global elementor-global-505 elementor-widget-breadcrumbs\" data-id=\"7ee8a6b4\" data-element_type=\"widget\" data-widget_type=\"breadcrumbs.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<p id=\"breadcrumbs\"><span><span><a href=\"https:\/\/www.plasticpackingbags.com\/\">Home<\/a><\/span><\/p>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t\t<\/div>\n\t\t<\/section>\n\t\t\t\t<section class=\"elementor-section elementor-top-section elementor-element elementor-element-427a1b34 elementor-section-boxed elementor-section-height-default elementor-section-height-default\" data-id=\"427a1b34\" data-element_type=\"section\">\n\t\t\t\t\t\t<div class=\"elementor-container elementor-column-gap-default\">\n\t\t\t\t\t<div class=\"elementor-column elementor-col-50 elementor-top-column elementor-element elementor-element-5af18686\" data-id=\"5af18686\" data-element_type=\"column\">\n\t\t\t<div class=\"elementor-widget-wrap elementor-element-populated\">\n\t\t\t\t\t\t\t\t<div class=\"elementor-element elementor-element-7bf64a1e elementor-widget elementor-widget-theme-post-title elementor-page-title elementor-widget-heading\" data-id=\"7bf64a1e\" data-element_type=\"widget\" data-widget_type=\"theme-post-title.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t<h1 class=\"elementor-heading-title elementor-size-default\">Why does pvc heat shrink film shrink when heated?<\/h1>\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-76bddbab elementor-align-center elementor-widget elementor-widget-post-info\" data-id=\"76bddbab\" data-element_type=\"widget\" data-widget_type=\"post-info.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<ul class=\"elementor-inline-items elementor-icon-list-items elementor-post-info\">\n\t\t\t\t\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-0471a3c elementor-inline-item\" =\"author\">\n\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"far fa-user-circle\"><\/i>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-author\">\n\t\t\t\t\t\t\t<span class=\"elementor-post-info__item-prefix\">Sales Manager :<\/span>\n\t\t\t\t\t\t\t\t\t\tWindy\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t<\/li>\n\t\t\t\t<li class=\"elementor-icon-list-item elementor-repeater-item-055a3ab elementor-inline-item\" =\"datePublished\">\n\t\t\t\t\t\t<a href=\"https:\/\/www.plasticpackingbags.com\/2021\/12\/20\/\">\n\t\t\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-icon\">\n\t\t\t\t\t\t\t\t<i aria-hidden=\"true\" class=\"fas fa-calendar\"><\/i>\t\t\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<span class=\"elementor-icon-list-text elementor-post-info__item elementor-post-info__item--type-date\">\n\t\t\t\t\t\t\t\t\t\t12\u6708 20, 2021\t\t\t\t\t<\/span>\n\t\t\t\t\t\t\t\t\t<\/a>\n\t\t\t\t<\/li>\n\t\t\t\t<\/ul>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-416009c7 elementor-widget elementor-widget-image\" data-id=\"416009c7\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"1000\" height=\"600\" src=\"https:\/\/www.plasticpackingbags.com\/wp-content\/uploads\/2021\/12\/pvc-film-meet-heat-banner-1.jpg\" class=\"attachment-large size-large\" alt=\"pvc film meet heat banner 1\" loading=\"lazy\" srcset=\"https:\/\/www.plasticpackingbags.com\/wp-content\/uploads\/2021\/12\/pvc-film-meet-heat-banner-1.jpg 1000w, https:\/\/www.plasticpackingbags.com\/wp-content\/uploads\/2021\/12\/pvc-film-meet-heat-banner-1-300x180.jpg 300w, https:\/\/www.plasticpackingbags.com\/wp-content\/uploads\/2021\/12\/pvc-film-meet-heat-banner-1-768x461.jpg 768w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2d92e3ea elementor-widget elementor-widget-text-editor\" data-id=\"2d92e3ea\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p><strong><em>pvc heat shrink film shrinks after heating, breaking the law of physics &#8220;thermal expansion and contraction&#8221;, why does this phenomenon occur?<\/em><\/strong><\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-796d1e1 elementor-widget elementor-widget-image\" data-id=\"796d1e1\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"643\" height=\"526\" src=\"https:\/\/www.plasticpackingbags.com\/wp-content\/uploads\/2021\/12\/12.20-pvc-film-1.png\" class=\"attachment-large size-large\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/www.plasticpackingbags.com\/wp-content\/uploads\/2021\/12\/12.20-pvc-film-1.png 643w, https:\/\/www.plasticpackingbags.com\/wp-content\/uploads\/2021\/12\/12.20-pvc-film-1-300x245.png 300w\" sizes=\"(max-width: 643px) 100vw, 643px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-9142686 elementor-widget elementor-widget-text-editor\" data-id=\"9142686\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>pvc heat shrink film will appear after heating the phenomenon of shrinkage, chasing its cause, most people do not quite understand, just as a heat shrink film performance to answer, today, Lianzhong packaging small to tell you the principle of shrink film shrinkage.<\/p><p>In fact, heat shrink film shrinkage after heating is a physical phenomenon that needs to be explained through certain physical knowledge, which simply means that the thermal movement of molecules causes the film to contract. The macromolecules of ordinary plastic film are in their natural curled state and do not generally shrink when heated.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-4fa5967 elementor-widget elementor-widget-image\" data-id=\"4fa5967\" data-element_type=\"widget\" data-widget_type=\"image.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<img decoding=\"async\" width=\"658\" height=\"593\" src=\"https:\/\/www.plasticpackingbags.com\/wp-content\/uploads\/2021\/12\/12.20-pvc-film-2.png\" class=\"attachment-large size-large\" alt=\"\" loading=\"lazy\" srcset=\"https:\/\/www.plasticpackingbags.com\/wp-content\/uploads\/2021\/12\/12.20-pvc-film-2.png 658w, https:\/\/www.plasticpackingbags.com\/wp-content\/uploads\/2021\/12\/12.20-pvc-film-2-300x270.png 300w\" sizes=\"(max-width: 658px) 100vw, 658px\" \/>\t\t\t\t\t\t\t\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-74d4428 elementor-widget elementor-widget-text-editor\" data-id=\"74d4428\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>The case of shrink film is different, as it undergoes a two-step process of film formation, with the raw materials melting and stretching the film at a defined temperature and under the action of an external force, with the macromolecules unable to slip between each other and not in their natural state of being frozen.<\/p><p>At room temperature, the plastic macromolecules are poorly mobile and therefore cannot rely on molecular movement to eliminate this unnatural state, which is why heat shrinkable films do not shrink at room temperature.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-fed3f2d elementor-widget elementor-widget-text-editor\" data-id=\"fed3f2d\" data-element_type=\"widget\" data-widget_type=\"text-editor.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t<p>However, this is only a superficial phenomenon, and the seemingly stable heat-shrinkable film already has unstable elements lurking inside. When the heat shrink film is reheated to a certain temperature, its frozen macromolecules start to move again, trying to return from their unnatural state to their natural state, resulting in shrinkage.<\/p><p>In fact, the phenomenon of shrinkage after heating is essentially the same as the relaxation and rebound of a rubber band, and the shrink film will return to its original state when the temperature is lowered.<\/p>\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<div class=\"elementor-element elementor-element-2e95ce2 elementor-post-navigation-borders-yes elementor-widget elementor-widget-post-navigation\" data-id=\"2e95ce2\" data-element_type=\"widget\" data-widget_type=\"post-navigation.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<div class=\"elementor-post-navigation\">\n\t\t\t<div class=\"elementor-post-navigation__prev elementor-post-navigation__link\">\n\t\t\t\t<a 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