{"id":6072,"date":"2026-05-29T11:06:45","date_gmt":"2026-05-29T11:06:45","guid":{"rendered":"https:\/\/www.rajapack.co.uk\/blog-uk\/?p=6072"},"modified":"2026-06-01T07:49:14","modified_gmt":"2026-06-01T07:49:14","slug":"paper-backed-vs-polypropylene-tape","status":"publish","type":"post","link":"https:\/\/www.rajapack.co.uk\/blog-uk\/paper-backed-vs-polypropylene-tape","title":{"rendered":"Paper-backed vs polypropylene: which tape is right for your despatch operation?"},"content":{"rendered":"<p>Paper-backed and polypropylene options seal boxes equally well under standard despatch conditions. The decision between them comes down to three things:<\/p>\n<ul>\n<li>Whether your <a href=\"https:\/\/www.rajapack.co.uk\/cardboard-boxes_C10.html\">boxes<\/a> go into a recycling stream<\/li>\n<li>Whether your packing environment is humid<\/li>\n<li>What you pay per sealed carton<\/li>\n<\/ul>\n<p>This guide covers the differences with honest trade-offs for each. It&#8217;s written for despatch managers and e-commerce operations choosing a specification, not switching between them on a roll-by-roll basis.<\/p>\n<p>In this article, we&#8217;ll cover:<\/p>\n<ul>\n<li>How the two formats differ in construction and adhesion<\/li>\n<li>Seal strength and humidity performance for each<\/li>\n<li>Recyclability and what it means for your packaging claims<\/li>\n<li>Cost per roll and application speed<\/li>\n<li>Which to choose based on your despatch volume and operation type<\/li>\n<\/ul>\n<h2>Quick comparison: paper-backed vs polypropylene<\/h2>\n<p>The table below covers the key differences at a glance. Each row is explained in full in the sections below.<\/p>\n<table>\n<tbody>\n<tr>\n<td width=\"192\"><strong>Factor<\/strong><\/td>\n<td width=\"192\"><strong>Paper-backed<\/strong><\/td>\n<td width=\"192\"><strong>Polypropylene<\/strong><\/td>\n<\/tr>\n<tr>\n<td width=\"192\"><strong>Backing material<\/strong><\/td>\n<td width=\"192\">Kraft paper (most common in the range)<\/td>\n<td width=\"192\">BOPP plastic film<\/td>\n<\/tr>\n<tr>\n<td width=\"192\"><strong>Adhesive (most common)<\/strong><\/td>\n<td width=\"192\">Natural rubber on standard products; hot melt on heavier grades<\/td>\n<td width=\"192\">Hot melt or acrylic<\/td>\n<\/tr>\n<tr>\n<td width=\"192\"><strong>Standard widths in range<\/strong><\/td>\n<td width=\"192\">25mm, 48mm, 75mm<\/td>\n<td width=\"192\">25mm, 48mm, 50mm, 75mm<\/td>\n<\/tr>\n<tr>\n<td width=\"192\"><strong>Standard length (hand)<\/strong><\/td>\n<td width=\"192\">50m<\/td>\n<td width=\"192\">50m or 66m<\/td>\n<\/tr>\n<tr>\n<td width=\"192\"><strong>Weight band (standard)<\/strong><\/td>\n<td width=\"192\">Up to 20kg<\/td>\n<td width=\"192\">Up to 20kg<\/td>\n<\/tr>\n<tr>\n<td width=\"192\"><strong>Weight band (reinforced)<\/strong><\/td>\n<td width=\"192\">Above 30kg (60gsm fibreglass \/ 125gsm kraft)<\/td>\n<td width=\"192\">Above 30kg with filament reinforcement<\/td>\n<\/tr>\n<tr>\n<td width=\"192\"><strong>Humidity performance<\/strong><\/td>\n<td width=\"192\">Lower \u2014 paper backing absorbs moisture<\/td>\n<td width=\"192\">Higher \u2014 film doesn&#8217;t absorb moisture<\/td>\n<\/tr>\n<tr>\n<td width=\"192\"><strong>Recyclable with cardboard<\/strong><\/td>\n<td width=\"192\">Yes (kerbside)<\/td>\n<td width=\"192\">No (contaminates bales)<\/td>\n<\/tr>\n<tr>\n<td width=\"192\"><strong>UV stability<\/strong><\/td>\n<td width=\"192\">Limited<\/td>\n<td width=\"192\">Acrylic grades resist UV; hot melt yellows<\/td>\n<\/tr>\n<tr>\n<td width=\"192\"><strong>Hand-tearable<\/strong><\/td>\n<td width=\"192\">Yes (standard kraft)<\/td>\n<td width=\"192\">No, requires a cutter<\/td>\n<\/tr>\n<tr>\n<td width=\"192\"><strong>Typical cost per roll<\/strong><\/td>\n<td width=\"192\">Higher<\/td>\n<td width=\"192\">Lower<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>&nbsp;<\/p>\n<h2>What is paper-backed tape sealing?<\/h2>\n<p>The paper-backed format uses a kraft paper or paper carrier with a pressure-sensitive adhesive, most commonly natural rubber on the standard 57gsm and 70gsm products in the RAJAPACK range, with hot melt used on the 80gsm and reinforced grades. It applies the same way as polypropylene: peel from the roll, press onto the box seam. No water activation is needed.<img loading=\"lazy\" decoding=\"async\" class=\" wp-image-4849 alignright\" src=\"https:\/\/www.rajapack.co.uk\/blog-uk\/wp-content\/uploads\/2023\/03\/Tape-1-430x412.png\" alt=\"\" width=\"359\" height=\"344\" srcset=\"https:\/\/www.rajapack.co.uk\/blog-uk\/wp-content\/uploads\/2023\/03\/Tape-1-430x412.png 430w, https:\/\/www.rajapack.co.uk\/blog-uk\/wp-content\/uploads\/2023\/03\/Tape-1.png 488w\" sizes=\"(max-width: 359px) 100vw, 359px\" \/><\/p>\n<p><a href=\"https:\/\/www.rajapack.co.uk\/packaging-tape-adhesives\/self-adhesive-paper-tape_C1812.html\">Kraft paper tape<\/a> is the most common backing in the range. The paper tears by hand cleanly on standard products, which is useful on a fast packing line. Reinforced variants are also stocked: a 60gsm semi-crepe paper with fibreglass reinforcement and a 125gsm kraft paper with artificial hot melt rubber adhesive. Both reinforced grades are rated for the above-30kg band and don&#8217;t tear cleanly by hand.<\/p>\n<p>The paper-backed format isn&#8217;t the same as the water-activated format (sometimes called gummed paper). <a href=\"https:\/\/www.rajapack.co.uk\/packaging-tape-adhesives\/gummed-tape-dispensers_C1822.html\">Gummed paper tape<\/a> which is water-activated (WAT) uses a starch-based adhesive that requires moistening before application and bonds into the cardboard fibres rather than sitting on the surface.<\/p>\n<h2>What is polypropylene sealing?<\/h2>\n<p>The polypropylene format uses a biaxially oriented polypropylene (BOPP) film as the backing with a hot melt or acrylic adhesive. It&#8217;s the default sealing option for most despatch operations: high volume, low cost per roll and reliable adhesion across a range of temperatures. For the full specification, see the <a href=\"https:\/\/www.rajapack.co.uk\/packaging-tape-adhesives\/polypropylene-tape_C1810.html\">polypropylene tapes<\/a> range.<\/p>\n<p>Hot melt adhesive gives polypropylene its characteristic instant grab. Press it onto a box and it holds immediately, which suits fast packing lines where <a href=\"https:\/\/www.rajapack.co.uk\/cardboard-boxes_C10.html\">cardboard boxes<\/a> move on quickly after sealing. Hot melt is rated for application from 15\u00b0C in the range. Acrylic builds its bond more slowly but handles lower temperatures (down to -5\u00b0C as standard) and ages better in storage, making it the right specification for longer-storage stock or cold-chain despatch. For the full comparison, see our <a href=\"https:\/\/www.rajapack.co.uk\/blog-uk\/hot-melt-vs-acrylic\/\">adhesive guide<\/a>.<\/p>\n<p>Standard polypropylene <a href=\"https:\/\/www.rajapack.co.uk\/packaging-tape-adhesives\/polypropylene-tape_C1810.html\">parcel tape<\/a> at 28 to 32 micron film thickness suits boxes up to 20kg. Heavier loads need a reinforced or filament construction; tensile strength is rated per product and varies by grade, check the product data sheet for specific figures before specifying at volume.<\/p>\n<h2>How do they compare on seal strength?<\/h2>\n<p>On smooth, dry corrugated board at ambient temperature, both formats deliver comparable seal strength. Both form a reliable pressure-sensitive bond that holds through normal transit handling. The main difference appears under stress.<\/p>\n<p>Paper-backed adhesion weakens in humid environments. Kraft paper absorbs moisture, which softens the backing and reduces the adhesive&#8217;s grip on the box surface. If your packing area is warm and humid, or if goods pass through cold-to-warm temperature transitions before despatch, the paper-backed format carries a higher risk of seal failure than polypropylene.<\/p>\n<p>Polypropylene handles humidity better. The film backing doesn&#8217;t absorb moisture, so the adhesive layer stays in contact with the box surface regardless of atmospheric conditions. For operations packing in unheated despatch areas in winter, or despatch routes that include unrefrigerated overnight storage, polypropylene is the more reliable option.<\/p>\n<p>Paper-backed seal strength can be improved with a reinforced grade &#8211; the 60gsm semi-crepe fibreglass or 125gsm kraft variants in the range are both rated for above 30kg loads. Switching to water-activated <a href=\"https:\/\/www.rajapack.co.uk\/packaging-tape-adhesives\/gummed-tape-dispensers_C1822.html\">gummed paper tape<\/a> removes humidity concerns almost entirely, since the fibre-level bond isn&#8217;t surface-dependent. For most standard e-commerce cartons below 15kg in a temperature-controlled packing environment, standard kraft with natural rubber adhesive performs well.<\/p>\n<p>To learn more about how these tapes compare to others, read our <a href=\"https:\/\/www.rajapack.co.uk\/blog-uk\/the-complete-guide-to-adhesive-tapes\">complete guide to adhesive tapes<\/a>.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"size-medium wp-image-4854 aligncenter\" src=\"https:\/\/www.rajapack.co.uk\/blog-uk\/wp-content\/uploads\/2023\/03\/shutterstock_1282734106-430x287.jpg\" alt=\"\" width=\"430\" height=\"287\" srcset=\"https:\/\/www.rajapack.co.uk\/blog-uk\/wp-content\/uploads\/2023\/03\/shutterstock_1282734106-430x287.jpg 430w, https:\/\/www.rajapack.co.uk\/blog-uk\/wp-content\/uploads\/2023\/03\/shutterstock_1282734106-768x512.jpg 768w, https:\/\/www.rajapack.co.uk\/blog-uk\/wp-content\/uploads\/2023\/03\/shutterstock_1282734106.jpg 1000w\" sizes=\"(max-width: 430px) 100vw, 430px\" \/><\/p>\n<h2>Which is more sustainable?<\/h2>\n<p>The paper-backed format is recyclable with the cardboard box. The kraft backing and natural rubber or hot melt adhesive are accepted in standard paper recycling streams. The sealed box goes directly into kerbside recycling without the seal needing to be removed. This is the biggest sustainability advantage paper holds over film.<\/p>\n<p>Polypropylene isn&#8217;t recyclable with the cardboard box. The plastic film contaminates cardboard recycling bales and can cause bale rejection at paper recycling facilities. UK kerbside recycling guidance is clear on this: plastic should be removed before cardboard boxes are recycled, but in practice most recipients don&#8217;t do it.<\/p>\n<p>For operations with sustainability commitments or EPR obligations, the paper-backed format supports credible recyclability claims that polypropylene cannot. RAJAPACK holds an <a href=\"https:\/\/www.rajapack.co.uk\/about-us\/certifications-trade-memberships_cms_000021.html\">EcoVadis Gold sustainability rating<\/a>, placing us in the top 5% of assessed companies globally.<\/p>\n<h2>How do cost and application speed compare?<\/h2>\n<p>Polypropylene costs less per roll than the paper-backed format. At high volume that adds up. For an operation sealing 500+ <a href=\"https:\/\/www.rajapack.co.uk\/cardboard-boxes_C10.html\">cardboard boxes<\/a> per day, the annual cost difference between the two formats can run to several hundred pounds depending on grade and supplier. Note that standard polypropylene comes in 50m and 66m hand-application rolls and 990m machine rolls, while paper-backed options in the range are stocked in 50m hand rolls, so the per-roll comparison needs to account for length as well as material.<\/p>\n<p>Application speed is comparable. Both apply with the same peel-and-press motion. Standard kraft tears by hand cleanly, which is a marginal benefit on busy lines. Polypropylene requires a blade cut or a <a href=\"https:\/\/www.rajapack.co.uk\/packaging-tape-adhesives\/tape-dispensers_C1816.html\">tape dispenser<\/a> with a built-in cutter. Neither difference is significant at low volume, but at scale the time difference will be noticeable.<\/p>\n<p>If switching to paper-backed allows you to make a credible recyclability claim, the value of that claim to your customer base may outweigh the slightly higher cost. That&#8217;s a business decision rather than a specification decision.<\/p>\n<h2>Which option is right for your despatch operation?<\/h2>\n<p>If recyclability is a requirement, whether from your own sustainability commitments or from retailer or EPR policy, paper-backed is the correct specification. It costs more per roll but removes the recyclability problem from your cardboard stream entirely.<\/p>\n<p>If you&#8217;re running a high-volume despatch operation in a humid or variable-temperature environment where seal reliability is the primary concern, polypropylene is the lower-risk choice. It&#8217;s more cost-effective at scale and more consistent under adverse packing conditions.<\/p>\n<p>If neither recyclability nor humidity is a deciding factor, cost per roll typically becomes the tiebreaker. The full <a href=\"https:\/\/www.rajapack.co.uk\/packaging-tape-adhesives_C18.html\">packing tape<\/a> range covers both formats across the standard width and length specifications.<\/p>\n<h2>Key takeaways<\/h2>\n<ul>\n<li>The paper-backed format uses a kraft paper backing with a pressure-sensitive adhesive \u2014 most commonly natural rubber on the 57gsm and 70gsm grades in the RAJAPACK range \u2014 and applies the same way as polypropylene. The paper backing is recyclable with the cardboard box; polypropylene isn&#8217;t.<\/li>\n<li>Polypropylene outperforms paper-backed in humid environments because the film backing doesn&#8217;t absorb moisture, maintaining adhesive contact with the box surface where paper-backed adhesion can soften and fail.<\/li>\n<li>Standard kraft paper-backed options in the range are rated for loads up to 20kg. The reinforced 60gsm semi-crepe fibreglass and 125gsm kraft grades are rated for above-30kg loads.<\/li>\n<li>Polypropylene costs less per roll than the paper-backed format. At 500 boxes per day, the annual cost difference runs to several hundred pounds depending on grade and supplier.<\/li>\n<li>For operations with recyclability requirements from sustainability commitments, retailer audits or Extended Producer Responsibility obligations, switching to paper-backed removes plastic film contamination from the cardboard recycling stream entirely.<\/li>\n<\/ul>\n<h2>FAQ: paper-backed vs polypropylene<\/h2>\n<h3>Can I use paper-backed in cold storage or chilled despatch?<\/h3>\n<p>Standard kraft with natural rubber adhesive in the range is rated for application from 10\u00b0C to 15\u00b0C minimum, depending on the specific product. Below that, the adhesive loses tack on cold surfaces. For chilled or frozen despatch, use an acrylic-adhesive polypropylene or specify a product rated for low-temperature application. Always check the product data sheet for the precise minimum.<\/p>\n<h3>Does the paper format leave residue when removed from a box?<\/h3>\n<p>It typically leaves some adhesive residue on removal because the bond between the adhesive and the cardboard surface is strong. It isn&#8217;t designed to be repositionable.<\/p>\n<h3>Is the kraft paper format the same as brown polypropylene?<\/h3>\n<p>No. Brown sealing options are most commonly polypropylene with a brown-pigmented film backing. The kraft paper format uses an actual paper backing made from unbleached kraft pulp. They look similar on a sealed box, but the kraft format is recyclable with the cardboard while brown polypropylene isn&#8217;t.<\/p>\n<h3>Can the paper format be printed with a logo or message?<\/h3>\n<p>Yes. Printed kraft is available with one or more colours on the paper face, using the same process as printed polypropylene. You can design and order your <a href=\"https:\/\/www.rajapack.co.uk\/packaging-tape-adhesives\/custom-printed-tape_C1828.html\">custom printed tape<\/a> in a few easy steps, on our website.<\/p>\n<h3>How does the paper-backed format compare to water-activated paper?<\/h3>\n<p>Paper-backed is pressure-sensitive and applies directly from the roll without water. Water-activated uses a starch-based adhesive that activates when moistened and bonds into the cardboard fibres, producing a structurally stronger and tamper-evident seal. Water-activated requires a dispenser, while paper-backed doesn&#8217;t. See the <a href=\"https:\/\/www.rajapack.co.uk\/packaging-tape-adhesives\/gummed-tape-dispensers_C1822.html\">gummed paper tape<\/a> for the full range.<\/p>\n<h3>Which is accepted in UK kerbside cardboard recycling?<\/h3>\n<p>Kraft paper-backed and water-activated paper are both accepted in UK kerbside cardboard recycling alongside the box. Polypropylene isn&#8217;t kerbside recyclable. Most UK local authorities advise removing plastic before recycling cardboard, but this is rarely done consistently in practice. Paper-backed removes that dependency entirely.<\/p>\n<h3>Does the width affect seal strength?<\/h3>\n<p>Yes. A wider option creates a larger bonded surface area across the box seam, which improves seal integrity on larger or heavier boxes. The RAJAPACK range stocks 25mm, 48mm and 75mm in paper-backed and 25mm, 48mm, 50mm and 75mm in polypropylene.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Paper-backed and polypropylene options seal boxes equally well under standard despatch conditions. The decision between them comes down to three things: Whether your boxes go into a recycling stream Whether [&#8230;]<\/p>\n","protected":false},"author":88,"featured_media":6117,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[21],"tags":[],"class_list":["post-6072","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-packaging-products-materials"],"acf":{"keep_image_height":true},"yoast_head":"\n<title>Paper-backed vs polypropylene: which tape is right for your despatch operation? | RAJAPACK UK Packaging Blog<\/title>\n<meta name=\"description\" content=\"Paper-backed or polypropylene? 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