{"id":7630,"date":"2026-10-27T06:50:01","date_gmt":"2026-10-27T06:50:01","guid":{"rendered":"https:\/\/uplastech.com\/plastic-packaging-tube-extrusion\/"},"modified":"2026-10-27T06:50:01","modified_gmt":"2026-10-27T06:50:01","slug":"plastic-packaging-tube-extrusion","status":"publish","type":"post","link":"https:\/\/uplastech.com\/tr\/plastic-packaging-tube-extrusion\/","title":{"rendered":"Plastic Packaging Tube Extrusion: From Die to Finished Tube"},"content":{"rendered":"<style>\n.upl-blog{font-size:17px;line-height:1.78;color:#1f2937}\n.upl-blog p{margin:0 0 18px}\n.upl-blog h2{font-size:26px;line-height:1.3;color:#0b2b33;margin:46px 0 14px;font-weight:700;letter-spacing:-.015em}\n.upl-blog h3{font-size:19.5px;color:#0d3b47;margin:28px 0 10px;font-weight:700}\n.upl-blog ul,.upl-blog ol{margin:0 0 20px;padding-left:22px}\n.upl-blog li{margin:0 0 9px}\n.upl-blog figure{margin:0 0 34px}\n.upl-blog figure img{width:100%;height:auto;display:block;border-radius:10px}\n.upl-blog figcaption{font-size:13px;color:#6b7280;margin-top:10px;line-height:1.5}\n.upl-blog .toc{background:none;border:0;border-radius:0;padding:0;margin:0 0 34px}\n.upl-blog .toc .lwptoc{margin:0}\n.upl-blog .toc h4{margin:0 0 10px;font-size:13px;letter-spacing:.1em;text-transform:uppercase;color:#0d5563}\n.upl-blog .toc ol{margin:0;padding-left:18px;font-size:14.5px}\n.upl-blog .toc li{margin-bottom:6px}\n.upl-blog table{width:100%;border-collapse:collapse;font-size:14.5px;margin:0 0 10px}\n.upl-blog th{background:#0d3b47;color:#fff;text-align:left;padding:11px 13px;font-weight:600;font-size:13.5px;border:0}\n.upl-blog td{padding:11px 13px;border:0;border-bottom:1px solid #e8ebed;vertical-align:top}\n.upl-blog tbody tr:nth-child(even){background:#fafbfc}\n.upl-blog .tablecap{font-size:12.5px;color:#6b7280;margin:0 0 30px}\n.upl-blog .myth{background:#fff8ef;border:1px solid #f6ddbd;border-radius:8px;padding:16px 20px;margin:0 0 26px;font-size:15.5px}\n.upl-blog .myth b{color:#a85c10}\n.upl-blog .callout{background:#f2f8f9;border-radius:8px;padding:18px 22px;margin:0 0 26px;font-size:15.5px;border-left:3px solid #14707f}\n.upl-blog .faq h3{border-top:1px solid #eceff1;padding-top:22px;margin-top:0;font-size:18px}\n.upl-blog .faq h3:first-of-type{border-top:0;padding-top:0}\n.upl-blog .cta{background:linear-gradient(135deg,#0b2b33,#0d5563);color:#fff;border-radius:12px;padding:34px;margin:48px 0 30px}\n.upl-blog .cta h2,.upl-blog .cta .cta-h{color:#fff;margin:0 0 10px;font-size:24px;font-weight:700;line-height:1.3}\n.upl-blog .cta p{color:#c9dee3;margin:0 0 20px;font-size:16px}\n.upl-blog .btn{display:inline-block;background:#e07a1f;color:#fff;text-decoration:none;font-weight:700;padding:13px 26px;border-radius:8px;font-size:15.5px}\n.upl-blog .rel{border-top:1px solid #e8ebed;margin-top:40px;padding-top:26px}\n.upl-blog .rel h4{font-size:13px;letter-spacing:.1em;text-transform:uppercase;color:#6b7280;margin:0 0 14px}\n.upl-blog .rel ul{list-style:none;padding:0;margin:0}\n.upl-blog .rel li{padding:11px 0;border-bottom:1px dashed #e8ebed}\n.upl-blog .rel a{text-decoration:none;font-weight:600;font-size:15.5px}\n@media(max-width:640px){.upl-blog h2{font-size:22px}.upl-blog table{font-size:13px}.upl-blog .cta{padding:24px}}\n\/* \u5355\u7bc7\u9875\u9690\u85cf WhatsApp \u81ea\u52a8\u5c55\u5f00\u7684\u95ee\u5019\u5361\uff0c\u53ea\u4fdd\u7559\u5706\u5f62\u6c14\u6ce1\uff0c\u907f\u514d\u906e\u6321\u4fa7\u680f\u8be2\u76d8\u63d0\u4ea4\u6309\u94ae *\/\nbody.single-post .ht_ctc_chat_greetings_box{display:none !important}\n<\/style>\n<div class=\"upl-blog\">\n<figure>\n<img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/uplastech.com\/wp-content\/uploads\/2026\/10\/pkg-tube-extrusion.jpg\" alt=\"White plastic packaging tube emerging from an extrusion die into a water cooling trough on a clean production line\" width=\"1536\" height=\"909\"><figcaption>A tube body coming off the die and into the cooling trough. Everything downstream of this point \u2014 the head, the cap, the print, the seal \u2014 is a separate operation. The extruder only makes the body, and the body is where most of the cost sits.<\/figcaption><\/figure>\n<div class=\"toc\"><\/div>\n<h2 id=\"what\">Two families of packaging tube, and only one is extruded<\/h2>\n<p>Walk into a tube plant and you will find one of two production models. They look similar in the finished product and are completely different in how they are made.<\/p>\n<p><strong>Extruded tubes<\/strong> are made the way you would expect: plastic granules go into a screw, a melt comes out of an annular die as a continuous tube, it is sized and cooled, and it is cut to length. The body is seamless. Wall thickness is set by the die and the haul-off speed. This is the process this article is about.<\/p>\n<p><strong>Laminate tubes<\/strong> start as a flat sheet. The sheet is printed, then rolled into a cylinder and the longitudinal seam is welded \u2014 usually ultrasonically \u2014 into a tube. The body has a seam. The sheet itself may be an aluminium foil laminate (ABL) or a co-extruded all-plastic film (PBL).<\/p>\n<div class=\"callout\">\n<p><strong>The practical consequence:<\/strong> an extruded tube has no seam and no printing underneath the surface, so it can only be decorated after the tube is made \u2014 by screen printing, offset printing on a mandrel, or a shrink sleeve. A laminate tube is printed flat, which is why laminate tubes carry the photographic-quality graphics and the extruded tube carries the simpler, heavier-ink designs.<\/p>\n<\/div>\n<table>\n<thead>\n<tr>\n<th><\/th>\n<th>Extruded tube<\/th>\n<th>Laminate tube (ABL \/ PBL)<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Body construction<\/td>\n<td>Seamless, direct from die<\/td>\n<td>Flat sheet rolled, longitudinal seam welded<\/td>\n<\/tr>\n<tr>\n<td>Typical wall<\/td>\n<td>0.4 \u2013 0.9 mm<\/td>\n<td>0.25 \u2013 0.45 mm<\/td>\n<\/tr>\n<tr>\n<td>Decoration<\/td>\n<td>After forming: screen, offset on mandrel, sleeve<\/td>\n<td>Before forming: flexo or gravure on flat sheet<\/td>\n<\/tr>\n<tr>\n<td>Print quality<\/td>\n<td>Good, limited halftone<\/td>\n<td>Photographic, up to 8 colours plus varnish<\/td>\n<\/tr>\n<tr>\n<td>Barrier<\/td>\n<td>Depends on resin and co-extrusion<\/td>\n<td>High; foil layer is absolute<\/td>\n<\/tr>\n<tr>\n<td>Tooling entry cost<\/td>\n<td>Die plus sizing sleeve, moderate<\/td>\n<td>Print cylinders per colour, high<\/td>\n<\/tr>\n<tr>\n<td>Economic batch<\/td>\n<td>From ~10,000 pcs<\/td>\n<td>From ~50,000 \u2013 100,000 pcs<\/td>\n<\/tr>\n<tr>\n<td>\u0130\u00e7in en iyisi<\/td>\n<td>Hand cream, gel, toothpaste in volume, industrial<\/td>\n<td>Premium cosmetics, pharma, high-graphic brands<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"tablecap\">Table 1 \u2014 The two tube families. The choice is usually made by the brand's artwork, not by the engineer.<\/p>\n<p>The rest of this article covers the extruded tube line, because that is the part an extrusion supplier controls. The head, the cap and the decoration are separate supply chains that happen to meet at the same filling line.<\/p>\n<h2 id=\"body\">The body: what happens between die and cutter<\/h2>\n<p>The tube body is a thin-wall pipe with two special requirements: the wall has to be concentric to within a few hundredths of a millimetre, and the surface has to be good enough to print on without preparation. Both of those are decided in the first two metres after the die.<\/p>\n<h3>The die<\/h3>\n<p>Most tube lines use a <strong>crosshead die<\/strong> \u2014 the melt enters from the side and turns 90\u00b0 to flow around a mandrel before exiting through an annular gap. The alternative is a spider die, where the melt flows around support legs and re-joins downstream. Crosshead is preferred for tubes because it leaves no weld line; spider legs always leave a faint longitudinal line that shows up as a defect after printing.<\/p>\n<p>The die gap sets the wall. For a 35 mm tube with a 0.5 mm wall, the die gap is typically 1.5 \u2013 2.5 mm \u2014 considerably larger than the finished wall, because the tube is drawn down between the die and the haul-off. Draw-down ratio is the die gap divided by the finished wall, and it is usually between 3:1 and 6:1. Higher draw-down gives better orientation and a thinner wall from the same die, but it also amplifies any concentricity error in the die.<\/p>\n<h3>Sizing and cooling<\/h3>\n<p>Two methods dominate. <strong>Vacuum sizing<\/strong> pulls the tube onto a cooled sleeve with a vacuum applied through slots; the outside diameter is set by the sleeve and the wall is set by the draw-down. <strong>Pressure sizing<\/strong> pushes air inside the tube so it expands against an external sleeve; this holds the bore round but requires a reliable seal at the die and at the haul-off.<\/p>\n<p>For packaging tubes vacuum sizing is more common, because the outside diameter is what the cap and the filling nozzle care about. The cooling trough is usually 3 \u2013 6 m long with spray rings, and the water temperature is held at 12 \u2013 18 \u00b0C. Cold water cools faster but increases internal stress, which shows up later as ovality after the tube is cut.<\/p>\n<table>\n<thead>\n<tr>\n<th>Parametre<\/th>\n<th>Typical setting<\/th>\n<th>What it controls<\/th>\n<th>Failure if wrong<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Melt temperature (PE)<\/td>\n<td>165 \u2013 195 \u00b0C<\/td>\n<td>Surface gloss, gel count<\/td>\n<td>Too cold: unmelt, rough surface. Too hot: odour, degradation specks<\/td>\n<\/tr>\n<tr>\n<td>Die gap<\/td>\n<td>1.5 \u2013 2.5 mm<\/td>\n<td>Wall, draw-down ratio<\/td>\n<td>Too small: high shear, melt fracture<\/td>\n<\/tr>\n<tr>\n<td>Draw-down ratio<\/td>\n<td>3:1 \u2013 6:1<\/td>\n<td>Orientation, wall consistency<\/td>\n<td>Too high: die lines amplified, eccentricity<\/td>\n<\/tr>\n<tr>\n<td>Vacuum<\/td>\n<td>-0.2 to -0.5 bar<\/td>\n<td>Outside diameter<\/td>\n<td>Too low: oversize, oval. Too high: drag marks<\/td>\n<\/tr>\n<tr>\n<td>Haul-off speed<\/td>\n<td>8 \u2013 25 m\/min<\/td>\n<td>Wall, output<\/td>\n<td>Speed change alters wall without touching the die<\/td>\n<\/tr>\n<tr>\n<td>Cooling water<\/td>\n<td>12 \u2013 18 \u00b0C<\/td>\n<td>Residual stress, ovality<\/td>\n<td>Too cold: oval after cutting. Too warm: deformation at haul-off<\/td>\n<\/tr>\n<tr>\n<td>Cut length<\/td>\n<td>\u00b1 0.5 mm<\/td>\n<td>Assembly fit<\/td>\n<td>Short tubes fail at the shoulder weld<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"tablecap\">Table 2 \u2014 Line settings for a 35 mm PE tube. Note that haul-off speed and die gap both change the wall \u2014 operators often change speed when they should change the die.<\/p>\n<h2 id=\"head\">The head is not extruded<\/h2>\n<p>The shoulder and neck of a tube \u2014 the part the cap screws onto \u2014 is almost always <strong>injection moulded<\/strong> in HDPE or PP, then welded to the extruded body. It is not extruded with the body, and there are three good reasons.<\/p>\n<p>First, the neck needs a precise thread and a sealing lip. Extrusion cannot hold those tolerances. Second, the shoulder is thick \u2014 1.5 to 3 mm at the transition \u2014 and an extruded thin wall cannot thicken locally without a very complex die. Third, colour: the head is often a different colour from the body, and moulding it separately avoids a two-material extrusion.<\/p>\n<p>The head is moulded on a multi-cavity tool, typically 8 \u2013 32 cavities, in a cycle of 12 \u2013 20 seconds. It is the single most expensive tool in the project and the longest lead time \u2014 8 to 12 weeks is normal, against 3 to 5 weeks for an extrusion die.<\/p>\n<table>\n<thead>\n<tr>\n<th>Joint method<\/th>\n<th>How it works<\/th>\n<th>Cycle<\/th>\n<th>G\u00fc\u00e7<\/th>\n<th>Used for<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Ultrasonic welding<\/td>\n<td>High-frequency vibration melts the interface<\/td>\n<td>1 \u2013 2 s<\/td>\n<td>High, leak-tight<\/td>\n<td>PE and PBL bodies, the default<\/td>\n<\/tr>\n<tr>\n<td>Hot plate \/ hot air<\/td>\n<td>Both surfaces heated, then pressed<\/td>\n<td>3 \u2013 6 s<\/td>\n<td>Y\u00fcksek<\/td>\n<td>Thicker walls, PP<\/td>\n<\/tr>\n<tr>\n<td>Adhesive<\/td>\n<td>Solvent or hot-melt applied to the shoulder<\/td>\n<td>Off-line<\/td>\n<td>Orta<\/td>\n<td>Small batches, unusual materials<\/td>\n<\/tr>\n<tr>\n<td>Spin welding<\/td>\n<td>Friction between rotating parts<\/td>\n<td>2 \u2013 4 s<\/td>\n<td>Y\u00fcksek<\/td>\n<td>Round necks, PP<\/td>\n<\/tr>\n<tr>\n<td>Injection over the tube end<\/td>\n<td>Head moulded directly onto the cut body<\/td>\n<td>15 \u2013 25 s<\/td>\n<td>Very high<\/td>\n<td>High-barrier, no-weld designs<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"tablecap\">Table 3 \u2014 Attaching the head. Ultrasonic welding dominates because it is fast, clean and needs no consumables.<\/p>\n<p>The weld is the first place a tube leaks. A tube that passes a pressure test at 0.5 bar when new can fail at 1.2 bar after two weeks on a shelf, because the weld interface creeps under sustained load. If the product is a cream with a preservative system that is sensitive to oxygen ingress, the weld quality matters more than the body barrier.<\/p>\n<h2 id=\"decoration\">Decoration decides the line layout<\/h2>\n<p>Extruded tubes cannot be printed flat, so they are printed as finished cylinders. That single constraint drives most of the equipment decisions downstream.<\/p>\n<table>\n<thead>\n<tr>\n<th>Y\u00f6ntem<\/th>\n<th>Colours<\/th>\n<th>Coverage<\/th>\n<th>\u00c7\u00f6z\u00fcn\u00fcrl\u00fck<\/th>\n<th>\u0130\u00e7in en iyisi<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Dry offset on mandrel<\/td>\n<td>Up to 6<\/td>\n<td>Full wrap<\/td>\n<td>Medium, no fine halftone<\/td>\n<td>High-volume toothpaste and cream<\/td>\n<\/tr>\n<tr>\n<td>Screen printing<\/td>\n<td>1 \u2013 4<\/td>\n<td>Partial<\/td>\n<td>Heavy ink deposit, strong solid colour<\/td>\n<td>Bold graphics, metallic inks, small batches<\/td>\n<\/tr>\n<tr>\n<td>Flexo on mandrel<\/td>\n<td>Up to 8<\/td>\n<td>Full wrap<\/td>\n<td>Orta<\/td>\n<td>Cost-sensitive volume work<\/td>\n<\/tr>\n<tr>\n<td>Heat transfer<\/td>\n<td>Up to 8<\/td>\n<td>Full wrap<\/td>\n<td>High, photographic<\/td>\n<td>Short runs needing premium graphics<\/td>\n<\/tr>\n<tr>\n<td>Shrink sleeve<\/td>\n<td>Photographic<\/td>\n<td>360\u00b0 plus cap<\/td>\n<td>Highest<\/td>\n<td>Premium launches, tamper evidence<\/td>\n<\/tr>\n<tr>\n<td>Labels<\/td>\n<td>Photographic<\/td>\n<td>Partial<\/td>\n<td>Y\u00fcksek<\/td>\n<td>Very short runs, test markets<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"tablecap\">Table 4 \u2014 Decoration routes for an extruded tube. Anything above four colours pushes the cost up sharply because each colour needs its own print station.<\/p>\n<p>Because printing happens on the finished cylinder, the tube must be round and concentric before it reaches the printer. An oval tube prints with a gap on one side and a squeeze on the other. This is why ovality tolerance \u2014 not wall thickness \u2014 is often the specification that rejects the most tubes.<\/p>\n<h2 id=\"line\">The full line, in order<\/h2>\n<ol>\n<li><strong>Ekstr\u00fczyon<\/strong> \u2014 granules to tube, cut to length, packed loose in boxes<\/li>\n<li><strong>Head moulding<\/strong> \u2014 separate operation, usually a different supplier<\/li>\n<li><strong>Head welding<\/strong> \u2014 ultrasonic, on a rotary or linear machine<\/li>\n<li><strong>Bask\u0131<\/strong> \u2014 offset, screen or flexo, on mandrels<\/li>\n<li><strong>Varnish \/ lacquer<\/strong> \u2014 UV or solvent, for gloss and scuff resistance<\/li>\n<li><strong>Capping<\/strong> \u2014 automatic, with torque control<\/li>\n<li><strong>Tail sealing<\/strong> \u2014 happens at the filler, not the tube maker<\/li>\n<\/ol>\n<p>Note that tail sealing is the filler's job. The tube maker ships an open tube with a cap on; the brand fills it and crimps the tail closed. This is why the tube's cut length tolerance matters: a tube 1 mm short will not reach the crimping jaws cleanly, and the seal will be weak on one corner.<\/p>\n<div class=\"myth\">\n<p><strong>Common assumption:<\/strong> \"the tube wall is what keeps the product safe, so a thicker wall is safer.\"<\/p>\n<p>Not for a squeeze tube. The wall is 0.5 mm because it has to be squeezed by hand \u2014 it is a mechanical requirement, not a barrier one. Barrier comes from the material and from the layer structure. Making the wall thicker adds cost, makes the tube stiff and hard to dispense from, and does nothing for shelf life. Where extra protection is needed, the answer is a barrier layer or a laminate, not more PE.<\/p>\n<\/div>\n<h2 id=\"quality\">What actually gets inspected<\/h2>\n<table>\n<thead>\n<tr>\n<th>Check<\/th>\n<th>Y\u00f6ntem<\/th>\n<th>Frequency<\/th>\n<th>Typical limit<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Outside diameter<\/td>\n<td>Caliper or laser gauge<\/td>\n<td>Every 30 min, 5 pcs<\/td>\n<td>\u00b1 0.15 mm<\/td>\n<\/tr>\n<tr>\n<td>Wall thickness<\/td>\n<td>Section and micrometer, or ultrasonic<\/td>\n<td>Every 30 min<\/td>\n<td>\u00b1 10 % of nominal<\/td>\n<\/tr>\n<tr>\n<td>Concentricity<\/td>\n<td>Section, four-point measurement<\/td>\n<td>Every shift<\/td>\n<td>\u2264 8 % of wall<\/td>\n<\/tr>\n<tr>\n<td>Ovality<\/td>\n<td>Two-axis diameter, 24 h after cutting<\/td>\n<td>Every shift<\/td>\n<td>\u2264 2 % of diameter<\/td>\n<\/tr>\n<tr>\n<td>Length<\/td>\n<td>Gauge<\/td>\n<td>Every 30 min<\/td>\n<td>\u00b1 0.5 mm<\/td>\n<\/tr>\n<tr>\n<td>Surface<\/td>\n<td>Visual against a limit sample<\/td>\n<td>S\u00fcrekli<\/td>\n<td>No gels over 0.3 mm, no die lines<\/td>\n<\/tr>\n<tr>\n<td>Odour \/ taste<\/td>\n<td>Panel test on the resin batch<\/td>\n<td>Per lot<\/td>\n<td>No taint<\/td>\n<\/tr>\n<tr>\n<td>Weld strength<\/td>\n<td>Pull test on the head joint<\/td>\n<td>Per batch<\/td>\n<td>No separation at 0.6 bar<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"tablecap\">Table 5 \u2014 Inspection plan for an extruded tube body. Ovality is measured after 24 hours because it develops as residual stress relaxes.<\/p>\n<p>The 24-hour wait on ovality is not bureaucracy. A tube measured straight off the line is round because it is still constrained by the cooling history. Cut it, leave it, and the stress relaxes over a few hours \u2014 a tube that was 0.1 mm oval at the machine can be 0.4 mm oval the next morning. Any plant that measures ovality immediately after cutting is measuring the wrong number.<\/p>\n<h2 id=\"cost\">Where the cost sits<\/h2>\n<p>For a 35 mm \u00d7 150 mm PE tube with a moulded head, cap and two-colour print, a rough split at 100,000 pieces looks like this:<\/p>\n<table>\n<thead>\n<tr>\n<th>Element<\/th>\n<th>Share of piece price<\/th>\n<th>Driven by<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Tube body (resin + extrusion)<\/td>\n<td>20 \u2013 26 %<\/td>\n<td>Wall thickness, resin grade, line speed<\/td>\n<\/tr>\n<tr>\n<td>Head (resin + moulding)<\/td>\n<td>18 \u2013 24 %<\/td>\n<td>Cavity count, cycle time, colour changes<\/td>\n<\/tr>\n<tr>\n<td>Cap<\/td>\n<td>8 \u2013 12 %<\/td>\n<td>Purchased part, closure type<\/td>\n<\/tr>\n<tr>\n<td>Welding<\/td>\n<td>5 \u2013 8 %<\/td>\n<td>Automation level<\/td>\n<\/tr>\n<tr>\n<td>Bask\u0131<\/td>\n<td>15 \u2013 25 %<\/td>\n<td>Number of colours, coverage<\/td>\n<\/tr>\n<tr>\n<td>Packing and freight<\/td>\n<td>6 \u2013 10 %<\/td>\n<td>Tube is mostly air; nesting matters<\/td>\n<\/tr>\n<tr>\n<td>Tooling amortisation<\/td>\n<td>4 \u2013 10 %<\/td>\n<td>Batch size against tool cost<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p class=\"tablecap\">Table 6 \u2014 Cost structure of a printed extruded tube. Printing is the most compressible line and the one brands change most often.<\/p>\n<p>The two levers that move the price most are print colours and wall thickness. Dropping from six colours to four saves more than thinning the wall from 0.5 to 0.45 mm, and it is easier to do. Thinning the wall below 0.4 mm starts to affect the feel of the tube in the hand, which consumers notice even when they cannot say why.<\/p>\n<h2 id=\"choosing\">Choosing between an extruded and a laminate tube<\/h2>\n<p>The decision usually comes down to three questions, in this order:<\/p>\n<p><strong>Does the artwork need photographic print?<\/strong> If yes, laminate. An extruded tube cannot reproduce a halftone image at retail quality, and no amount of print tuning fixes it.<\/p>\n<p><strong>Does the formula need a real oxygen barrier?<\/strong> If the product is a retinol serum, a probiotic or anything oxygen-sensitive, the foil in an ABL tube gives an absolute barrier that no co-extruded plastic matches. PBL with EVOH comes close and is recyclable, but it is not the same number.<\/p>\n<p><strong>What is the annual volume?<\/strong> Below about 50,000 pieces, laminate print cylinders cannot be amortised and the extruded tube wins on tooling. Above 500,000, laminate becomes competitive on piece price and better on graphics.<\/p>\n<p>Between those two extremes both options work, and the decision is usually made on the brand's packaging brief rather than on engineering. That is worth knowing before you spend two weeks optimising a tube the marketing team will reject for the wrong shade of white.<\/p>\n<div class=\"faq\">\n<h3>What is the difference between an extruded tube and a laminate tube?<\/h3>\n<p>An extruded tube is a seamless plastic pipe made directly from a die \u2014 the body has no seam. A laminate tube is made from a flat printed sheet rolled into a cylinder and welded along one longitudinal seam. Extruded tubes are printed after forming; laminate tubes are printed flat before forming, which is why they carry higher-quality graphics.<\/p>\n<h3>Why is the tube wall only 0.5 mm?<\/h3>\n<p>Because the consumer has to squeeze it. Wall thickness is a mechanical requirement set by the feel of the tube in the hand, not by barrier. Thicker walls make the tube stiff, harder to dispense from, and more expensive, without improving shelf life. Barrier is a material and layer-structure question.<\/p>\n<h3>Can the head be extruded with the body in one piece?<\/h3>\n<p>Not practically. The neck needs a precise thread and a sealing lip, the shoulder is three to six times thicker than the wall, and the head is often a different colour. It is injection moulded separately and welded on \u2014 ultrasonically in most plants.<\/p>\n<h3>What causes a tube to go oval after cutting?<\/h3>\n<p>Residual stress from cooling. If the cooling water is too cold or the draw-down ratio too high, the wall freezes with stress locked in. When the tube is cut, the constraint is released and the section relaxes into an oval. It develops over hours, which is why ovality must be measured a day after production, not at the machine.<\/p>\n<h3>How many colours can be printed on an extruded tube?<\/h3>\n<p>Six with dry offset, which is the practical ceiling for a mandrel machine. Each additional colour needs its own print station and plate set, so cost rises in steps rather than smoothly. Screen printing handles one to four colours with heavier ink deposit and is common for metallic or high-opacity designs.<\/p>\n<h3>What is draw-down ratio and why does it matter?<\/h3>\n<p>It is the die gap divided by the finished wall thickness, typically 3:1 to 6:1. Higher draw-down lets you make a thinner wall from the same die and improves orientation, but it also amplifies any concentricity error in the die and makes the wall harder to hold. Most tube lines run at the low end because consistency matters more than resin saving.<\/p>\n<h3>Does the tube maker seal the tail?<\/h3>\n<p>No. The tube ships open with a cap fitted; the brand fills it and crimps the tail closed on the filling line. That is why cut length tolerance matters \u2014 a tube that is short will not sit squarely in the crimping jaws.<\/p>\n<h3>What is the minimum economic batch for an extruded tube?<\/h3>\n<p>Around 10,000 pieces for a plain tube with a stock cap, because the extrusion die and sizing sleeve are relatively cheap. Once you add a custom moulded head the economic batch rises to 30,000 \u2013 50,000, and with six-colour print it is closer to 100,000.<\/p>\n<\/div>\n<div class=\"cta\">\n<p class=\"cta-h\">Need tube bodies extruded to your drawing?<\/p>\n<p>Send us the diameter, wall, length, resin and annual volume. We will come back with the die design, the tolerance band we can hold, and a sample schedule.<\/p>\n<p><a class=\"btn\" href=\"https:\/\/uplastech.com\/tr\/boru-ve-tup-ekstruzyonlari\/\">Talk to a tube extrusion engineer<\/a>\n<\/div>\n<div class=\"rel\">\n<h4>Continue reading<\/h4>\n<ul>\n<li><a href=\"https:\/\/uplastech.com\/tr\/abl-pbl-pe-packaging-tube-materials\/\">ABL, PBL or PE: Choosing the Tube Body Material<\/a><\/li>\n<li><a href=\"https:\/\/uplastech.com\/tr\/packaging-tube-tolerances-wall-thickness\/\">Packaging Tube Tolerances: Diameter, Wall and Ovality<\/a><\/li>\n<li><a href=\"https:\/\/uplastech.com\/tr\/packaging-tube-extrusion-defects\/\">Tube Extrusion Defects: Gels, Die Lines and Weld Lines<\/a><\/li>\n<li><a href=\"https:\/\/uplastech.com\/tr\/packaging-tube-barrier-coextrusion\/\">Barrier Co-Extrusion for Tubes: EVOH and Tie Layers<\/a><\/li>\n<li><a href=\"https:\/\/uplastech.com\/tr\/plastic-pipe-extrusion-guide\/\">Plastic Pipe Extrusion: A Complete Process Guide<\/a><\/li>\n<\/ul>\n<\/div>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>How a packaging tube is actually made: the split between extruded and laminate tubes, the die and cooling settings that set the wall, why the head is moulded separately, and where the cost sits in a printed tube.<\/p>","protected":false},"author":1,"featured_media":7625,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_seopress_titles_title":"Plastic Packaging Tube Extrusion: Die to Finished Tube","_seopress_titles_desc":"Packaging tube extrusion: extruded vs laminate tubes, die and cooling settings, why the head is injection moulded, decoration routes, inspection plan and cost structure.","_seopress_robots_index":"1","_seopress_robots_follow":"1","_seopress_robots_imageindex":"","_seopress_robots_snippet":"","_seopress_robots_primary_cat":"17","_seopress_robots_breadcrumbs":"","_seopress_robots_freeze_modified_date":"","_seopress_robots_custom_modified_date":"","_seopress_robots_canonical":"https:\/\/uplastech.com\/plastic-packaging-tube-extrusion\/","_seopress_social_fb_title":"","_seopress_social_fb_desc":"","_seopress_social_fb_img":"","_seopress_social_fb_img_attachment_id":0,"_seopress_social_fb_img_width":0,"_seopress_social_fb_img_height":0,"_seopress_social_twitter_title":"","_seopress_social_twitter_desc":"","_seopress_social_twitter_img":"","_seopress_social_twitter_img_attachment_id":0,"_seopress_social_twitter_img_width":0,"_seopress_social_twitter_img_height":0,"_seopress_redirections_value":"","_seopress_redirections_enabled":"","_seopress_redirections_enabled_regex":"","_seopress_redirections_logged_status":"","_seopress_redirections_param":"","_seopress_redirections_type":0,"_seopress_analysis_target_kw":"packaging tube extrusion","footnotes":""},"categories":[17],"tags":[],"class_list":["post-7630","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-plastic-extrusion-process"],"meta_box":{"post-to-quiz_to":[]},"_links":{"self":[{"href":"https:\/\/uplastech.com\/tr\/wp-json\/wp\/v2\/posts\/7630","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/uplastech.com\/tr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/uplastech.com\/tr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/uplastech.com\/tr\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/uplastech.com\/tr\/wp-json\/wp\/v2\/comments?post=7630"}],"version-history":[{"count":0,"href":"https:\/\/uplastech.com\/tr\/wp-json\/wp\/v2\/posts\/7630\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/uplastech.com\/tr\/wp-json\/wp\/v2\/media\/7625"}],"wp:attachment":[{"href":"https:\/\/uplastech.com\/tr\/wp-json\/wp\/v2\/media?parent=7630"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/uplastech.com\/tr\/wp-json\/wp\/v2\/categories?post=7630"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/uplastech.com\/tr\/wp-json\/wp\/v2\/tags?post=7630"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}