{"id":3961,"date":"2024-12-16T05:17:02","date_gmt":"2024-12-16T05:17:02","guid":{"rendered":"https:\/\/ppboxy.com\/?post_type=product&p=3961"},"modified":"2026-06-08T09:11:31","modified_gmt":"2026-06-08T09:11:31","slug":"pp-hollow-sheet-4mm","status":"publish","type":"product","link":"https:\/\/ppboxy.com\/es\/product\/pp-hollow-sheet-4mm\/","title":{"rendered":"4mm PP Hollow Sheet"},"content":{"rendered":"

4mm PP Hollow Sheet \u2014 The Thinnest Self-Supporting Corrugated Polypropylene Board<\/h2>\n

The\u00a04mm PP Hollow Sheet<\/strong>\u00a0is the thinnest gauge of polypropylene corrugated board that stands on its own without a supporting frame. At approximately\u00a00.65 kg\/m\u00b2<\/strong>, it provides the rigidity and flatness that 2\u20133 mm sheets cannot achieve without external reinforcement \u2014 yet it weighs roughly\u00a030 % less than the 5 mm alternative<\/strong>, reducing both material cost and shipping weight across every pallet.<\/p>\n

This makes 4 mm the\u00a0cost-optimal thickness<\/strong>\u00a0for a wide range of standard packaging applications:\u00a0electronics component trays, courier box liners, agricultural turnover crate inserts, and retail product dividers<\/strong>. It is the thickness most OEM specifiers default to when they need “a PP corrugated board that holds its shape” \u2014 strong enough to protect, light enough to ship, and inexpensive enough to specify at scale.<\/p>\n

Fabricado con\u00a0100 % recyclable polypropylene (PP recycling code 5)<\/strong>, PPBOXY’s 4mm hollow sheet is waterproof, chemically inert, and rated for\u00a0\u221220 \u00b0C to +80 \u00b0C<\/strong>\u00a0continuous service \u2014 making it suitable for refrigerated logistics and outdoor staging where cardboard degrades. Every sheet is available in\u00a0custom lengths up to 6000 mm<\/strong>, widths up to 2100 mm, and colors matched to your Pantone reference.<\/p>\n

Specifications<\/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
Especificaciones<\/th>\nDetalle<\/th>\n<\/tr>\n<\/thead>\n
Material<\/strong><\/td>\n100 % recyclable polypropylene (PP) corrugated\/twin-wall sheet<\/td>\n<\/tr>\n
Espesor<\/strong><\/td>\n4 mm (\u00b10.2 mm tolerance)<\/td>\n<\/tr>\n
Weight<\/strong><\/td>\n~0.65 kg\/m\u00b2<\/td>\n<\/tr>\n
Standard Size<\/strong><\/td>\n4\u00d78 pies (1220 \u00d7 2440 mm)<\/td>\n<\/tr>\n
Custom Size Range<\/strong><\/td>\n500 mm \u00d7 500 mm up to 2100 mm \u00d7 6000 mm<\/td>\n<\/tr>\n
Available Colors<\/strong><\/td>\nWhite, blue, black, red, green, yellow, custom Pantone<\/td>\n<\/tr>\n
Rango de temperatura<\/strong><\/td>\n\u221220 \u00b0C to +80 \u00b0C<\/td>\n<\/tr>\n
Water Absorption<\/strong><\/td>\n< 0.01 % (virtually zero)<\/td>\n<\/tr>\n
Resistencia qu\u00edmica<\/strong><\/td>\nOils, solvents, weak acids, weak alkalis<\/td>\n<\/tr>\n
Load Capacity<\/strong><\/td>\n~15 kg uniform load (400 \u00d7 600 mm panel, edge-supported)<\/td>\n<\/tr>\n
Self-Supporting<\/strong><\/td>\nYes \u2014 holds flat without frame<\/td>\n<\/tr>\n
Foldable<\/strong><\/td>\nPossible along score line, but not the preferred choice for folding<\/td>\n<\/tr>\n
Print Compatibility<\/strong><\/td>\nScreen printing (standard); digital\/offset (Corona-treated option)<\/td>\n<\/tr>\n
ESD Option<\/strong><\/td>\nAvailable (carbon-loaded PP, 10\u2076\u201310\u2079 \u03a9\/sq)<\/td>\n<\/tr>\n
Food Contact<\/strong><\/td>\nEU 10\/2011 & FDA 21 CFR 177.1520 compliant<\/td>\n<\/tr>\n
Reciclabilidad<\/strong><\/td>\nPP recycling code 5 \u2014 fully recyclable<\/td>\n<\/tr>\n
Reusability<\/strong><\/td>\n50\u2013100+ cycles<\/td>\n<\/tr>\n
Cantidad m\u00ednima de pedido<\/strong><\/td>\nNo minimum order quantity<\/td>\n<\/tr>\n
Certifications<\/strong><\/td>\nSGS, ISO 9001, REACH, RoHS<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Why 4 mm? The Self-Supporting Sweet Spot Between 3 mm and 5 mm<\/h2>\n

Choosing the right PP corrugated thickness is not simply “thicker = better.” Each millimetre increment changes the board’s structural behaviour, cost profile, and best-fit applications. The table below shows where 4 mm fits \u2014 and why it is the most frequently specified thickness in packaging and logistics.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n
Propiedad<\/th>\n3 mm PP Sheet<\/th>\n4 mm PP Sheet<\/strong><\/th>\n5 mm PP Sheet<\/th>\n<\/tr>\n<\/thead>\n
Self-supporting?<\/strong><\/td>\n\u274c No \u2014 requires frame or folding<\/td>\n\u2705 Yes \u2014 holds flat without support<\/strong><\/td>\n\u2705 Yes \u2014 greater rigidity<\/td>\n<\/tr>\n
Foldable by hand?<\/strong><\/td>\n\u2705 Yes \u2014 score-and-snap<\/td>\n\u26a0\ufe0f Possible along score line, but not preferred<\/td>\n\u274c No \u2014 too thick to fold cleanly<\/td>\n<\/tr>\n
Weight (approx.)<\/strong><\/td>\n~0.45 kg\/m\u00b2<\/td>\n~0.65 kg\/m\u00b2<\/strong><\/td>\n~0.85 kg\/m\u00b2<\/td>\n<\/tr>\n
Relative material cost<\/strong><\/td>\nLowest<\/td>\nOptimal \u2014 best rigidity-per-dollar<\/strong><\/td>\n~30 % higher than 4 mm<\/td>\n<\/tr>\n
Flat surface for printing<\/strong><\/td>\nModerate \u2014 slight flex<\/td>\nExcellent \u2014 stable flat surface<\/strong><\/td>\nExcellent \u2014 very stable<\/td>\n<\/tr>\n
Best for<\/strong><\/td>\nFoldable boxes, curved forms<\/td>\nFlat inserts, tray liners, self-standing panels<\/strong><\/td>\nHeavy loads, reusable pallets, printed signage<\/td>\n<\/tr>\n
Typical application<\/strong><\/td>\nFoldable courier boxes<\/td>\nElectronics trays, crate inserts, dividers<\/strong><\/td>\nLayer pads, printed boards, industrial dividers<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Key takeaway<\/strong>: If your application requires a board that\u00a0lies flat under its own weight without bowing<\/strong>\u00a0\u2014 and you don’t want to pay for the extra 30 % material cost of 5 mm \u2014 4 mm is the engineering and economic optimum.<\/p>\n

Need a board you can fold into a box? See our\u00a03mm PP Corrugated Sheet<\/a>. Need a premium surface for high-resolution printing? See our\u00a05mm Polypropylene Sheet with Corona treatment<\/a>.<\/p>\n

Key Features of the 4mm PP Hollow Sheet<\/h2>\n

Self-Supporting Flatness Without a Frame<\/h3>\n

The 4 mm twin-wall structure provides enough section modulus to\u00a0span open areas without sagging<\/strong>\u00a0\u2014 a capability that 2\u20133 mm sheets lack. In practical terms, a 400 mm \u00d7 600 mm panel of 4 mm PP hollow sheet laid across a 350 mm gap will support over\u00a015 kg of uniformly distributed load<\/strong>\u00a0without visible deflection. This eliminates the need for secondary support structures in tray and divider applications, reducing assembly time and part count.<\/p>\n

Weight-Optimal at ~0.65 kg\/m\u00b2<\/h3>\n

At approximately\u00a00.65 kg\/m\u00b2<\/strong>, the 4 mm sheet is light enough for manual handling in high-volume packing lines while providing 40\u201360 % more rigidity than 3 mm sheets. For a typical electronics factory packing 2,000 units\/day, switching from 5 mm to 4 mm tray inserts saves roughly\u00a0400 kg of daily shipping weight<\/strong>\u00a0\u2014 a tangible cost reduction that compounds across every shipment.<\/p>\n

Waterproof & Chemically Inert<\/h3>\n

Polypropylene’s\u00a0closed-cell fluted core absorbs zero moisture<\/strong>\u00a0(water absorption < 0.01 %), unlike solid fibreboard or cardboard that softens and warps in humid environments. The PP resin resists oils, weak acids, weak alkalis, and common solvents, making 4 mm sheets suitable for automotive parts trays, chemical packaging inserts, and food-contact applications (EU 10\/2011 and FDA 21 CFR 177.1520 compliant).<\/p>\n

Standard 4\u00d78 ft & Custom Sizes<\/h3>\n

PPBOXY stocks the industry-standard\u00a04\u00d78 pies (1220 \u00d7 2440 mm)<\/strong>\u00a0format for immediate availability, with custom sizes up to\u00a02100 mm width \u00d7 6000 mm length<\/strong>\u00a0available on order. Common industry-specific cuts include:<\/p>\n\n\n\n\n\n\n\n\n
Application<\/th>\nTypical Cut Size<\/th>\nUse Case<\/th>\n<\/tr>\n<\/thead>\n
Electronics tray insert<\/td>\n400 \u00d7 600 mm<\/td>\nPCB and component separation<\/td>\n<\/tr>\n
Courier box liner<\/td>\n400 \u00d7 300 mm<\/td>\nInner wall and base protection<\/td>\n<\/tr>\n
Agricultural crate divider<\/td>\n500 \u00d7 350 mm<\/td>\nProduce separation in turnover crates<\/td>\n<\/tr>\n
Retail product display<\/td>\n1200 \u00d7 800 mm<\/td>\nFree-standing shelf\/back panel<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Color Options for Visual Coding & Branding<\/h3>\n

Available in\u00a0white, blue, black, red, green, yellow, and custom Pantone-matched colors<\/strong>, 4 mm sheets serve double duty as\u00a0visual management tools<\/strong>\u00a0in warehouse and production environments. Color-code by product line, inspection status, or hazard class while simultaneously providing physical protection. White is the most common choice for printing and general packaging; blue and black are preferred for industrial and outdoor applications where UV resistance is required.<\/p>\n

Industry Applications for 4mm PP Hollow Sheet<\/h2>\n

Electronics & Semiconductor Packaging<\/h3>\n

4 mm is the\u00a0default thickness for electronics tray inserts and component dividers<\/strong>\u00a0\u2014 rigid enough to hold PCBs flat without warping, thin enough to minimize package bulk. The waterproof surface prevents moisture-related failures during transit and storage, and the non-outgassing polypropylene is safe for cleanroom-adjacent handling. For ESD-sensitive components, PPBOXY offers carbon-loaded 4 mm sheets with surface resistivity of 10\u2076\u201310\u2079 \u03a9\/sq.<\/p>\n

Courier & E-Commerce Packaging<\/h3>\n

In high-volume courier operations, 4 mm PP hollow sheet is used as\u00a0inner liners, base pads, and structural dividers<\/strong>\u00a0within corrugated plastic boxes. Unlike cardboard inserts that degrade after a single trip, 4 mm PP liners are reusable for\u00a050\u2013100+ cycles<\/strong>, dramatically reducing per-shipment packaging cost. The self-supporting flatness ensures product presentation quality without additional framing. Pair with our\u00a0Caja de env\u00edo para art\u00edculos fr\u00e1giles de Correx<\/a>\u00a0for complete fragile-item protection.<\/p>\n

Agricultural Turnover Crates<\/h3>\n

4 mm sheet is the standard divider material inside\u00a0PP corrugated agricultural crates<\/strong>\u00a0\u2014 it separates produce layers without adding excessive weight to manual handling. The waterproof surface withstands hydrocooling and washdown protocols, and the chemical resistance tolerates sanitizing agents used in post-harvest processing. See our\u00a0Envases agr\u00edcolas<\/a>\u00a0collection for complete crate solutions.<\/p>\n

Automotive Parts Trays & Separators<\/h3>\n

In automotive assembly and parts logistics, 4 mm PP sheet functions as\u00a0inter-layer separators and protective sleeves for machined components<\/strong>\u00a0\u2014 pistons, gaskets, bearings, and stamped parts. The flat, non-abrasive surface prevents surface finish damage, while chemical resistance protects against incidental contact with oils and coolants. The self-supporting rigidity allows tray designs without secondary structural elements.<\/p>\n

Retail Display & Point-of-Purchase<\/h3>\n

For retail environments, 4 mm PP sheet provides the\u00a0lightest self-standing display backboard<\/strong>\u00a0\u2014 rigid enough to mount on easels or slot into display fixtures without bowing, yet light enough for easy repositioning by store staff. Available in white for direct printing (or pair with our\u00a05mm Corona-treated sheet<\/a>\u00a0for high-resolution graphics). See also our\u00a0Carteles de PP<\/a>\u00a0for dedicated signage solutions.<\/p>\n

Preguntas frecuentes<\/h3>\n

Q1: What is a 4mm PP hollow sheet used for?<\/strong><\/p>\n

A 4 mm PP hollow sheet is most commonly used as\u00a0tray inserts, crate dividers, and inner packaging liners<\/strong>\u00a0where the board must lie flat under its own weight without a supporting frame. It is the default thickness for electronics component trays, courier box liners, agricultural crate dividers, and automotive parts separators. Its self-supporting rigidity at low weight makes it the cost-optimal choice for flat-panel packaging applications.<\/p>\n

Q2: What is the difference between 3mm, 4mm, and 5mm PP corrugated sheets?<\/strong><\/p>\n

3 mm<\/strong>\u00a0is thin enough to fold into boxes by hand \u2014 ideal for foldable packaging where rigidity is less important than formability.\u00a04 mm<\/strong>\u00a0is the thinnest gauge that is self-supporting \u2014 it holds flat without a frame, making it the best choice for inserts, trays, and dividers.\u00a05 mm<\/strong>\u00a0provides maximum rigidity and is preferred for heavy-duty layer pads, printed signage, and reusable pallets. See our\u00a03mm sheet<\/a>\u00a0for folding applications or\u00a05mm sheet<\/a>\u00a0for heavy-duty and printing needs.<\/p>\n

Q3: Is 4mm PP hollow sheet waterproof?<\/strong><\/p>\n

Yes. Polypropylene’s closed-cell fluted core absorbs\u00a0zero moisture<\/strong>\u00a0(water absorption < 0.01 %). Unlike cardboard or solid fibreboard, 4 mm PP hollow sheet does not soften, warp, or degrade when exposed to water, condensation, or high humidity. It performs reliably in refrigerated logistics, outdoor staging, and washdown environments.<\/p>\n

Q4: Can I print on a 4mm PP hollow sheet?<\/strong><\/p>\n

Yes, with surface preparation. Standard 4 mm PP sheet accepts screen printing and vinyl overlay without treatment. For\u00a0high-resolution digital or offset printing<\/strong>, PPBOXY offers\u00a0Corona-treated 4 mm sheets<\/strong>\u00a0that raise surface energy from ~30 to 42+ dynes\/cm, enabling UV, solvent, and latex ink adhesion. For premium print quality, see our\u00a05mm Corona-treated polypropylene sheet<\/a>.<\/p>\n

Q5: How does 4mm PP hollow sheet compare to cardboard of equivalent thickness?<\/strong><\/p>\n

4 mm PP hollow sheet is\u00a0waterproof, reusable (50\u2013100+ cycles vs. cardboard’s 1\u20133 trips), and chemically resistant<\/strong>\u00a0\u2014 all qualities that cardboard lacks. While cardboard has a lower unit price, PP’s reusability delivers a lower\u00a0per-cycle cost<\/strong>\u00a0after approximately 5\u20138 uses. PP also maintains flatness and structural integrity in humid and refrigerated environments where cardboard softens and fails.<\/p>\n

Q6: What is the load capacity of a 4mm PP hollow sheet?<\/strong><\/p>\n

A 400 mm \u00d7 600 mm panel of 4 mm PP hollow sheet supported at the edges can support approximately\u00a015 kg of uniformly distributed load<\/strong>\u00a0without visible deflection. Point loads should be distributed using rubber pads or foam inserts to prevent localised flute crushing. For applications requiring higher load capacity, consider our\u00a05mm blue PP corrugated sheet<\/a>\u00a0or\u00a0plastic corrugated layer pads<\/a>.<\/p>\n

Q7: What sizes are available for 4mm PP hollow sheet?<\/strong><\/p>\n

PPBOXY stocks the standard\u00a04\u00d78 pies (1220 \u00d7 2440 mm)<\/strong>\u00a0format with immediate availability. Custom cuts are available from\u00a0500 mm \u00d7 500 mm up to 2100 mm \u00d7 6000 mm<\/strong>. Common pre-cut sizes for electronics, courier, and agricultural applications are listed in the specifications table above. Contact our team for application-specific sizing recommendations.<\/p>\n

\"4mm
PP Hollow Sheet 4mm<\/figcaption><\/figure>","protected":false},"excerpt":{"rendered":"
    \n
  • Material:<\/strong> 100 % recyclable polypropylene (PP) corrugated\/twin-wall sheet<\/li>\n
  • Thickness:<\/strong> 4 mm (\u00b10.2 mm tolerance)<\/li>\n
  • Weight:<\/strong> ~0.65 kg\/m\u00b2<\/li>\n
  • Tama\u00f1o est\u00e1ndar:<\/strong> 4\u00d78 pies (1220 \u00d7 2440 mm)<\/li>\n
  • Custom Size Range:<\/strong> 500 mm \u00d7 500 mm up to 2100 mm \u00d7 6000 mm<\/li>\n
  • Available Colors:<\/strong> White, blue, black, red, green, yellow, custom Pantone<\/li>\n
  • Cantidad m\u00ednima de pedido:<\/strong> No minimum order quantity<\/li>\n<\/ul>\n

    Discover the durable and eco-friendly PP Hollow Sheet 4mm, ideal for packaging, advertising, and various industrial applications<\/p>","protected":false},"featured_media":3965,"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":[172],"class_list":{"0":"post-3961","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-hollow-sheet","7":"product_tag-pp-hollow-sheet-4mm","8":"desktop-align-left","9":"tablet-align-left","10":"mobile-align-left","12":"first","13":"instock","14":"taxable","15":"shipping-taxable","16":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/ppboxy.com\/es\/wp-json\/wp\/v2\/product\/3961"}],"collection":[{"href":"https:\/\/ppboxy.com\/es\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/ppboxy.com\/es\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/ppboxy.com\/es\/wp-json\/wp\/v2\/comments?post=3961"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/ppboxy.com\/es\/wp-json\/wp\/v2\/media\/3965"}],"wp:attachment":[{"href":"https:\/\/ppboxy.com\/es\/wp-json\/wp\/v2\/media?parent=3961"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/ppboxy.com\/es\/wp-json\/wp\/v2\/product_brand?post=3961"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/ppboxy.com\/es\/wp-json\/wp\/v2\/product_cat?post=3961"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/ppboxy.com\/es\/wp-json\/wp\/v2\/product_tag?post=3961"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}