{"id":3248,"date":"2024-11-06T06:12:58","date_gmt":"2024-11-06T06:12:58","guid":{"rendered":"https:\/\/ppboxy.com\/?post_type=product&p=3248"},"modified":"2026-06-26T02:30:20","modified_gmt":"2026-06-26T02:30:20","slug":"pp-flame-retardant-sheet","status":"publish","type":"product","link":"https:\/\/ppboxy.com\/fr\/product\/pp-flame-retardant-sheet\/","title":{"rendered":"PP Flame Retardant Sheet"},"content":{"rendered":"

PP Flame Retardant Sheet \u2014 Fire-Rated Material, Not Just a Fire-Rated Product<\/strong><\/h2>\n

A flame-retardant sheet is not standard PP with a coating. The fire resistance is built into the polymer itself \u2014 a phosphorus-nitrogen flame retardant system compounded into the PP resin before extrusion. When exposed to flame, the FR additives promote char formation on the sheet surface, which insulates the underlying polymer and starves the combustion zone of fuel. The sheet self-extinguishes \u2014 typically within 10 seconds of flame removal \u2014 and does not produce flaming drips that could ignite materials below.<\/p>\n

This is the material distinction that separates PPBOXY’s FR sheet from commodity PP sheet: it is sold as a material grade with documented fire test performance, not as a finished product. Fabricators, converters, and OEM manufacturers buy FR sheet to make things \u2014 partitions, enclosures, vehicle interior panels, electrical housings. PPBOXY supplies the FR sheet material with full test certification; the fabricator builds the end product.<\/p>\n

For finished FR board applications in construction and signage, see PP Flame Retardant Board \u2192, which covers application-specific formats including wind load ratings and print compatibility. For the complete PP sheet type comparison, see PP Sheet \u2192.<\/p>\n\n\n\n\n\n\n\n
What You Need<\/th>\nBest Page<\/th>\nAller \u00e0<\/th>\n<\/tr>\n<\/thead>\n
FR sheet material for fabrication<\/strong>\u00a0\u2014 raw material with test certs<\/td>\nUL 94 \/ LOI \/ EN 13501 specs, processing guide<\/td>\nThis page<\/td>\n<\/tr>\n
FR board for construction partitions<\/strong>\u00a0\u2014 finished application<\/td>\nWind load, print compatibility, building code references<\/td>\nPP Flame Retardant Board \u2192<\/a><\/td>\n<\/tr>\n
Standard (non-FR) sheet<\/strong><\/td>\nFor applications without fire rating requirements<\/td>\nPP Sheet \u2192<\/a> (navigation hub)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Caract\u00e9ristiques techniques<\/strong><\/h2>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
Parameter<\/th>\nCaract\u00e9ristiques techniques<\/th>\n<\/tr>\n<\/thead>\n
Product<\/strong><\/td>\nPP Flame Retardant Sheet \u2014 UL 94 V-0 halogen-free FR polypropylene sheet<\/td>\n<\/tr>\n
Mat\u00e9riau<\/strong><\/td>\nPolypropylene (PP) + halogen-free phosphorus-nitrogen flame retardant system<\/td>\n<\/tr>\n
Structure<\/strong><\/td>\nTwin-wall corrugated (fluted) PP sheet<\/td>\n<\/tr>\n
UL 94 Rating<\/strong><\/td>\nV-0 \u2014 self-extinguishing < 10 s (vertical burn test, 3.0 mm and above)<\/td>\n<\/tr>\n
Glow Wire Flammability Index (GWFI)<\/strong><\/td>\n960 \u00b0C (3.0 mm)<\/td>\n<\/tr>\n
Limiting Oxygen Index (LOI)<\/strong><\/td>\n28\u201332% (standard PP: ~17%)<\/td>\n<\/tr>\n
EN 13501-1 Classification<\/strong><\/td>\nB-s1,d0 (limited combustibility, low smoke, no flaming droplets)<\/td>\n<\/tr>\n
Halogen Content<\/strong><\/td>\nHalogen-free \u2014 IEC 61249-2-21 compliant<\/td>\n<\/tr>\n
Toxic Gas Emission<\/strong><\/td>\nNo hydrogen halide (HCl, HBr), hydrogen cyanide (HCN), or hydrogen fluoride (HF) release during combustion<\/td>\n<\/tr>\n
Thickness Range<\/strong><\/td>\n2\u201310 mm<\/td>\n<\/tr>\n
Format standard de feuille<\/strong><\/td>\n1,220 \u00d7 2,440 mm (4 \u00d7 8 ft)<\/td>\n<\/tr>\n
Custom Sizes<\/strong><\/td>\nUp to 2,100 \u00d7 6,000 mm<\/td>\n<\/tr>\n
Densit\u00e9<\/strong><\/td>\n0.60\u20130.92 g\/cm\u00b3<\/td>\n<\/tr>\n
Options de couleur<\/strong><\/td>\nWhite, black, grey (standard); custom on request<\/td>\n<\/tr>\n
R\u00e9sistance \u00e0 la traction<\/strong><\/td>\n\u2265 18 MPa<\/td>\n<\/tr>\n
R\u00e9sistance aux chocs<\/strong><\/td>\n\u2265 10 kJ\/m\u00b2<\/td>\n<\/tr>\n
Absorption d'eau<\/strong><\/td>\n< 0,01%<\/td>\n<\/tr>\n
Temp\u00e9rature de fonctionnement<\/strong><\/td>\n\u221220 \u00b0C to +80 \u00b0C continuous<\/td>\n<\/tr>\n
UV Resistance<\/strong><\/td>\nStandard UV stabiliser included (2\u20133 years outdoor)<\/td>\n<\/tr>\n
Recyclabilit\u00e9<\/strong><\/td>\n100% PP #5 (FR additives do not interfere with PP recycling stream)<\/td>\n<\/tr>\n
Fabrication<\/strong><\/td>\nCNC routing, die-cutting, scoring and folding, heat bending (160\u2013180 \u00b0C), hot air \/ ultrasonic welding, screen \/ UV digital printing<\/td>\n<\/tr>\n
Certifications<\/strong><\/td>\nUL 94, IEC 61249-2-21 (halogen-free), EN 13501-1 test reports, REACH, RoHS<\/td>\n<\/tr>\n
Quantit\u00e9 minimale de commande<\/strong><\/td>\nAucun<\/td>\n<\/tr>\n
D\u00e9lai de livraison<\/strong><\/td>\n7\u201314 business days<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

How FR PP Sheet Achieves V-0 Without Halogens \u2014 The Phosphorus-Nitrogen System<\/strong><\/h2>\n

Traditional flame retardants \u2014 brominated and chlorinated compounds \u2014 work by releasing halogen radicals that interrupt the combustion chain reaction in the gas phase. They are effective but problematic: the gases released (hydrogen chloride, hydrogen bromide) are toxic and corrosive, and halogenated FR additives are increasingly restricted under EU RoHS, REACH, and WEEE directives.<\/p>\n

PPBOXY’s FR sheet uses a halogen-free phosphorus-nitrogen intumescent system that works through a completely different mechanism:<\/p>\n

1. Char Formation (Condensed Phase)<\/strong><\/p>\n

When heated, the phosphorus compound decomposes to form phosphoric acid, which catalyzes the dehydration of the PP polymer into a carbonaceous char. The nitrogen compound decomposes to release inert gases (N\u2082, NH\u2083) that swell the char into a thick, insulating foam layer. This char layer physically separates the underlying polymer from the flame and oxygen.<\/p>\n

2. No Flaming Drip<\/strong><\/p>\n

Standard PP melts and drips when exposed to flame \u2014 the dripping molten polymer can ignite materials below, spreading the fire vertically. The char layer formed by the FR system prevents the underlying polymer from melting and dripping. UL 94 V-0 certification requires zero flaming drips.<\/p>\n

3. Low Smoke, No Toxic Gas<\/strong><\/p>\n

Halogenated FR systems produce dense, toxic smoke. The phosphorus-nitrogen system produces significantly less smoke (EN 13501-1 smoke classification: s1, the best possible rating) and no hydrogen halide gases. This is critical for applications in occupied spaces \u2014 building interiors, transit vehicles, public venues \u2014 where smoke inhalation, not flame contact, is the leading cause of fire fatalities.<\/p>\n

Why “Halogen-Free” Matters<\/strong>\u00a0Halogen-free compliance (IEC 61249-2-21: < 900 ppm total chlorine, < 900 ppm total bromine, < 1,500 ppm total halogens) is increasingly a procurement requirement for: EU construction products under Construction Products Regulation (CPR), transit vehicle interiors per EN 45545-2, electronic equipment enclosures per IEC 62368-1, and green building certifications (LEED, BREEAM, DGNB).<\/p>\n

Fabrication \u2014 How to Process FR PP Sheet<\/strong><\/h2>\n

FR PP sheet machines similarly to standard PP \u2014 the same tools, the same techniques \u2014 with minor adjustments:<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n
Process<\/th>\nFR PP Sheet Behavior<\/th>\nNotes<\/th>\n<\/tr>\n<\/thead>\n
CNC Routing<\/strong><\/td>\nStandard \u2014 use same feeds and speeds as standard PP<\/td>\nFR additives have negligible effect on machinability<\/td>\n<\/tr>\n
Die-Cutting<\/strong><\/td>\nStandard<\/td>\nClean edges \u2014 no FR residue<\/td>\n<\/tr>\n
Score & Fold<\/strong><\/td>\nStandard \u2014 score along flute direction<\/td>\nFold radius may be slightly larger than standard PP at \u2264 4 mm<\/td>\n<\/tr>\n
Heat Bending<\/strong><\/td>\n160\u2013180 \u00b0C \u2014 same as standard PP<\/td>\nFR system does not affect thermoforming temperature range<\/td>\n<\/tr>\n
Hot Air Welding<\/strong><\/td>\nStandard \u2014 PP welding rod compatible<\/td>\nFR PP rod available for color-matched welds<\/td>\n<\/tr>\n
S\u00e9rigraphie<\/strong><\/td>\nStandard \u2014 corona treat to \u2265 38 dyne<\/td>\nFR surface accepts ink identically to standard PP<\/td>\n<\/tr>\n
UV Digital Printing<\/strong><\/td>\nStandard \u2014 corona treatment recommended<\/td>\nFull-color, photo-quality graphics on FR substrate<\/td>\n<\/tr>\n
Laser Cutting<\/strong><\/td>\n\u26a0\ufe0f Not recommended<\/td>\nFR additives may produce char edge that requires post-processing; CNC preferred<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Foire aux questions<\/strong><\/h2>\n

Q: What is the difference between this FR sheet page and the PP Flame Retardant Board page?<\/strong><\/p>\n

This page covers FR PP sheet as a material grade \u2014 UL 94 \/ LOI \/ EN 13501 test specifications, the halogen-free FR chemistry, and fabrication methods. It is for buyers who need FR sheet material to manufacture their own products. The PP Flame Retardant Board page covers finished FR board applications \u2014 construction partitions, transit vehicle interiors, trade show booth walls \u2014 with application-specific information like wind load ratings and print compatibility. If you are buying raw material for fabrication, you are on the right page.<\/p>\n

Q: Is UL 94 V-0 the same as “fireproof”?<\/strong><\/p>\n

No \u2014 and this distinction is important. UL 94 V-0 means the material self-extinguishes within 10 seconds after flame removal and does not produce flaming drips. It does not mean the material will not burn \u2014 no polypropylene is non-combustible. V-0 means the material resists ignition, self-extinguishes rapidly, and does not spread fire through dripping. For applications requiring non-combustible materials (e.g., structural building elements), mineral-based boards (calcium silicate, magnesium oxide) are required, not PP.<\/p>\n

Q: Is the FR sheet halogen-free?<\/strong><\/p>\n

Yes. PPBOXY’s FR sheet uses a phosphorus-nitrogen intumescent flame retardant system that contains no bromine, chlorine, or other halogens. It complies with IEC 61249-2-21 halogen-free requirements (< 900 ppm Cl, < 900 ppm Br, < 1,500 ppm total halogens). This is important for EU construction products, transit vehicle interiors, and green building certifications that increasingly require halogen-free materials.<\/p>\n

Q: Can FR PP sheet be recycled?<\/strong><\/p>\n

Yes. The phosphorus-nitrogen FR additives do not interfere with the PP #5 recycling stream. FR PP sheet can be ground, pelletized, and re-extruded alongside standard PP. Unlike halogenated FR systems, there is no risk of corrosive gas generation during reprocessing. PPBOXY accepts back used FR sheet from volume customers for recycling.<\/p>\n

Q: What thickness should I use for a construction partition or electrical enclosure?<\/strong><\/p>\n

Construction partitions: 5\u20136 mm for standard wall protection; 8\u201310 mm for structural partitions and high-traffic areas. Electrical enclosures: 3\u20135 mm for internal component barriers; 6\u20138 mm for external enclosures requiring impact resistance. Contact PPBOXY with your specific fire rating requirement, span, and loading condition for a thickness recommendation.<\/p>\n

Q: What is the minimum order quantity?<\/strong><\/p>\n

We do not have a strict minimum order quantity. Whether you need a small trial order or a large-volume shipment, we can accommodate your requirements. Contact us with your preferred specifications, quantity, and destination, and our team will provide a customized quotation and the most cost-effective shipping solution.<\/p>\n

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Discover PPBOXY’s PP Flame Retardant Sheets for enhanced safety in your projects. Ideal for industrial, construction, and commercial applications. Custom solutions available!<\/p>","protected":false},"featured_media":3251,"comment_status":"open","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"product_brand":[],"product_cat":[50],"product_tag":[80,78,77,81,79],"class_list":{"0":"post-3248","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-hollow-sheet","7":"product_tag-fire-safe-building-materials","8":"product_tag-flame-resistant-polypropylene","9":"product_tag-pp-flame-retardant-sheet","10":"product_tag-ppboxy","11":"product_tag-safety-plastic-sheets","12":"desktop-align-left","13":"tablet-align-left","14":"mobile-align-left","16":"first","17":"instock","18":"taxable","19":"shipping-taxable","20":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/ppboxy.com\/fr\/wp-json\/wp\/v2\/product\/3248"}],"collection":[{"href":"https:\/\/ppboxy.com\/fr\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/ppboxy.com\/fr\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/ppboxy.com\/fr\/wp-json\/wp\/v2\/comments?post=3248"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ppboxy.com\/fr\/wp-json\/wp\/v2\/media\/3251"}],"wp:attachment":[{"href":"https:\/\/ppboxy.com\/fr\/wp-json\/wp\/v2\/media?parent=3248"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/ppboxy.com\/fr\/wp-json\/wp\/v2\/product_brand?post=3248"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/ppboxy.com\/fr\/wp-json\/wp\/v2\/product_cat?post=3248"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/ppboxy.com\/fr\/wp-json\/wp\/v2\/product_tag?post=3248"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}