{"id":15195,"date":"2024-09-22T12:03:48","date_gmt":"2024-09-22T08:33:48","guid":{"rendered":"https:\/\/imenpol.com\/blog\/en\/?p=15195"},"modified":"2025-01-21T09:13:04","modified_gmt":"2025-01-21T05:43:04","slug":"polyurethane-floral-foam","status":"publish","type":"post","link":"https:\/\/imenpol.com\/blog\/en\/technology\/polyurethane-floral-foam\/","title":{"rendered":"Polyurethane floral foam"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"15195\" class=\"elementor elementor-15195\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-61edf14 e-flex e-con-boxed e-con e-parent\" data-id=\"61edf14\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-7191e04 content-table elementor-toc--minimized-on-tablet elementor-widget elementor-widget-table-of-contents\" data-id=\"7191e04\" data-element_type=\"widget\" data-e-type=\"widget\" data-settings=\"{&quot;headings_by_tags&quot;:[&quot;h2&quot;,&quot;h3&quot;],&quot;container&quot;:&quot;.table-contents&quot;,&quot;exclude_headings_by_selector&quot;:[],&quot;marker_view&quot;:&quot;numbers&quot;,&quot;no_headings_message&quot;:&quot;No headings were found on this page.&quot;,&quot;minimize_box&quot;:&quot;yes&quot;,&quot;minimized_on&quot;:&quot;tablet&quot;,&quot;hierarchical_view&quot;:&quot;yes&quot;,&quot;min_height&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_tablet&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]},&quot;min_height_mobile&quot;:{&quot;unit&quot;:&quot;px&quot;,&quot;size&quot;:&quot;&quot;,&quot;sizes&quot;:[]}}\" data-widget_type=\"table-of-contents.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__header\">\n\t\t\t\t\t\t<h6 class=\"elementor-toc__header-title\">\n\t\t\t\tTable of contents\t\t\t<\/h6>\n\t\t\t\t\t\t\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--expand\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__7191e04\" aria-expanded=\"true\" aria-label=\"Open table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-down\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M207.029 381.476L12.686 187.132c-9.373-9.373-9.373-24.569 0-33.941l22.667-22.667c9.357-9.357 24.522-9.375 33.901-.04L224 284.505l154.745-154.021c9.379-9.335 24.544-9.317 33.901.04l22.667 22.667c9.373 9.373 9.373 24.569 0 33.941L240.971 381.476c-9.373 9.372-24.569 9.372-33.942 0z\"><\/path><\/svg><\/div>\n\t\t\t\t<div class=\"elementor-toc__toggle-button elementor-toc__toggle-button--collapse\" role=\"button\" tabindex=\"0\" aria-controls=\"elementor-toc__7191e04\" aria-expanded=\"true\" aria-label=\"Close table of contents\"><svg aria-hidden=\"true\" class=\"e-font-icon-svg e-fas-chevron-up\" viewBox=\"0 0 448 512\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M240.971 130.524l194.343 194.343c9.373 9.373 9.373 24.569 0 33.941l-22.667 22.667c-9.357 9.357-24.522 9.375-33.901.04L224 227.495 69.255 381.516c-9.379 9.335-24.544 9.317-33.901-.04l-22.667-22.667c-9.373-9.373-9.373-24.569 0-33.941L207.03 130.525c9.372-9.373 24.568-9.373 33.941-.001z\"><\/path><\/svg><\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<div id=\"elementor-toc__7191e04\" class=\"elementor-toc__body\">\n\t\t\t<div class=\"elementor-toc__spinner-container\">\n\t\t\t\t<svg class=\"elementor-toc__spinner eicon-animation-spin e-font-icon-svg e-eicon-loading\" aria-hidden=\"true\" viewBox=\"0 0 1000 1000\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\"><path d=\"M500 975V858C696 858 858 696 858 500S696 142 500 142 142 304 142 500H25C25 237 238 25 500 25S975 237 975 500 763 975 500 975Z\"><\/path><\/svg>\t\t\t<\/div>\n\t\t<\/div>\n\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-62d24ad  table-contents e-flex e-con-boxed e-con e-parent\" data-id=\"62d24ad\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-a6889dc elementor-widget elementor-widget-text-editor\" data-id=\"a6889dc\" data-element_type=\"widget\" data-e-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\t\t<p>Rigid polyurethane foams (RPUFs) are extensively used in numerous engineering applications due to their light weight, considerable speci\ufb01c strength, and superior heat insulation, etc. RPUFs are usually closed-cell foams due to the usage of low boiling point substance as foaming agents, resulting in the tightly reticular air barrier, low moisture vapor permeability and resistance to water. However, in several new application areas, such as \ufb02oral foam and noise reduction materials, RPUFs with high open-cells are required with properties of high-water absorption or sound absorption.<\/p>\n<p>\u00a0<\/p>\n<h2><strong>What is a floral foam?<\/strong><\/h2>\n<p>Flower foam is well known, having been available for decades, ever since, it\u2019s been an essential tool in floral design by making the process of arranging flowers simpler, speedier and more creative. It is supplied as a block of dry, solid foam with open-celled structure. The use of phenol-formaldehyde (PF) or urea-formaldehyde (UF) foamed products as supports for cut flowers have been in common usage in the floral industry for many years; that is due to their uniform or homogeneous nature, consisting of a single type of hydrophilic or wettable foam.<\/p>\n<p>Foam properties desired are rapid wettability, good water retention, proper color, a crisp texture and ease of flower penetration, with good support and retention of the flower stems by the foam.<\/p>\n<p>Floral foams are hydrophilic, capable of high water absorption as well as having the extremely low swelling ratios (around 1%), implying the high open-cell ratio and density of RPUFs. The RPUFs with the properties of high water absorption, low swelling ratio, and suitable density are favorable for the application of \ufb02oral foam.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-2433c86 e-flex e-con-boxed e-con e-parent\" data-id=\"2433c86\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8957bf8 elementor-widget elementor-widget-image\" data-id=\"8957bf8\" data-element_type=\"widget\" data-e-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 fetchpriority=\"high\" decoding=\"async\" width=\"747\" height=\"494\" src=\"https:\/\/imenpol.com\/blog\/en\/wp-content\/uploads\/sites\/2\/2024\/09\/flower-arrangement.png\" class=\"attachment-full size-full wp-image-15204\" alt=\"\" srcset=\"https:\/\/imenpol.com\/blog\/en\/wp-content\/uploads\/sites\/2\/2024\/09\/flower-arrangement.png 747w, https:\/\/imenpol.com\/blog\/en\/wp-content\/uploads\/sites\/2\/2024\/09\/flower-arrangement-300x198.png 300w\" sizes=\"(max-width: 747px) 100vw, 747px\" \/>\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\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-b9639d5  table-contents e-flex e-con-boxed e-con e-parent\" data-id=\"b9639d5\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-b019247 elementor-widget elementor-widget-text-editor\" data-id=\"b019247\" data-element_type=\"widget\" data-e-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\t\t<h2><strong>Polyurethane <\/strong><strong>floral foam synthesis<\/strong><\/h2>\n<p>Polyurethane foams, however, tend to be hydrophobic by nature, thus limiting the amount of water the sponge will retain. More hydrophilic polyether polyols, when used increase the hydrophilicity of the foam tend to uncontrollably increase the rate of reaction creating an extremely hot exotherm which burns the foam during its preparation. The problem exacerbated when a high functional polyol is used to prepare a rigid foam.<\/p>\n<p>The open-cell RPUFs were synthesized through a one-step method. Typically, open-cell RPUFs can be synthesized by utilizing cell-opening agents, such as 1-butanol or the lithium salt of 12-hydroxystearic acid (Li-12HSA). In other words, an open-cell, hydrophilic polyurethane foam having a high compression strength and a high water retention capacity which foam is suitable for use as a substrate for cut flowers and which foam is obtained from reaction of a polyisocyanate and a mixture of two different type polyhydroxyl compounds while in admixture with a surfactant and a blowing agent (water is usually used as a blowing agent). In fact, the surfactant helps ensure that the final flower foam block is not hydrophobic and is able to soak up water. As a result, generally silicone-based surfactants are used in the formulations. It has to be noted that water absorption is usually associated with the open-cell ratio and density.<\/p>\n<p>Although the hydrophilic foams obtained by this process have a very high-water absorption capacity, their capacity for retaining water, is below 30%. For this reason and because of their low compression strength of about 200 p\/cm which is due to their low density, the foam resins obtained are hardly suitable for use as substrates for cut flowers.<\/p>\n<p>This process for the production of open-celled, hydrophilic polyurethane foams which have a density of from about 15 to about 40 kg\/m<sup>3<\/sup> from a polyisocyanate, polyhydroxyl compounds, water and- \/or other blowing agents, emulsifiers and optionally other auxiliary agents and additives, which is characterized in that the polyhydroxyl compounds used are mixtures of a about 50 to about 90 percent by weight, based upon the total quantity of polyhydroxyl compounds, of polyhydroxyl compound with an OH-number from about 300 to about 1820, in which at least about 50% of the hydroxyl groups are primary hydroxyl groups and\/or which contain tertiary amino groups in the molecule.<\/p>\n<p>In the foaming process, the slow-gelling reaction rate allowed the bubbles to easily escape from the matrix before it forms the \ufb01rm struts. Finally, an equilibrium was reached between the gelation and blowing reaction, leading to the formation of RPUFs with uniform cell size. After the necessary curing time, the foam can be easily cut into blocks of the desired size and shape, which will deliver its performance uniformly.<\/p>\n<p>\u00a0<\/p>\n<h2><strong>Types of polyurethane floral foam<\/strong><\/h2>\n<p>Generally speaking, there are two kinds of foam for floral applications: wet and dry foam.<\/p>\n<p>Wet floral foam is used with live flowers that need water, while dry foam is used for artificial flowers and the occasional craft. Wet foam can keep flowers hydrated for as much as four days (without additional water), is easy to transport, holds flowers tightly in place, and is incredibly easy to use.<\/p>\n<p>Dry flower foam is very dense and heavier than wet. On the other site, density of wet flower foam is not as compact or dense as dry foam, because the wet foam must have open space for water. It also has to be mentioned that wet foams come in green colors and dry foams are normally gray or brown.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-935095a e-flex e-con-boxed e-con e-parent\" data-id=\"935095a\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-ead7ae0 elementor-widget elementor-widget-image\" data-id=\"ead7ae0\" data-element_type=\"widget\" data-e-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=\"500\" height=\"453\" src=\"https:\/\/imenpol.com\/blog\/en\/wp-content\/uploads\/sites\/2\/2024\/09\/polyurethane-floral-foam.jpg\" class=\"attachment-full size-full wp-image-15205\" alt=\"\" srcset=\"https:\/\/imenpol.com\/blog\/en\/wp-content\/uploads\/sites\/2\/2024\/09\/polyurethane-floral-foam.jpg 500w, https:\/\/imenpol.com\/blog\/en\/wp-content\/uploads\/sites\/2\/2024\/09\/polyurethane-floral-foam-300x272.jpg 300w\" sizes=\"(max-width: 500px) 100vw, 500px\" \/>\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\t<\/div>\n\t\t\t\t<\/div>\n\t\t<div class=\"elementor-element elementor-element-3379b8e  table-contents e-flex e-con-boxed e-con e-parent\" data-id=\"3379b8e\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-84d8670 elementor-widget elementor-widget-text-editor\" data-id=\"84d8670\" data-element_type=\"widget\" data-e-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\t\t<p>To sum up, it can be noted that one of the most challenging applications of polyurethane in terms of processing as well as formulation design is the manufacture of floral foam, a rigid, moulded, open-cell. \u00a0Moreover, the RPUFs with the properties of high water absorption, low swelling ratio, and suitable density are favorable for the application of \ufb02oral foam.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>Rigid polyurethane foams (RPUFs) are used in floral design for their high water absorption and open-cell structure. Floral foams, available as wet and dry types, facilitate flower arrangement and vary in density. The synthesis process enhances water retention and balances hydrophilicity, though some foams may have limited strength for certain applications.<\/p>\n","protected":false},"author":4,"featured_media":15202,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[5],"tags":[85],"class_list":["post-15195","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-technology","tag-polyurethane-foam-articles"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Polyurethane floral foam - Imenpol blog<\/title>\n<meta name=\"description\" content=\"Imenpol blog\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/imenpol.com\/blog\/en\/technology\/polyurethane-floral-foam\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Polyurethane floral foam - 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