{"id":64,"date":"2026-11-06T19:06:37","date_gmt":"2026-11-06T11:06:37","guid":{"rendered":"https:\/\/kerkepm.com\/knowledge\/twin-screw-extruder-temperature-profile-by-material\/"},"modified":"2026-11-12T19:12:23","modified_gmt":"2026-11-12T11:12:23","slug":"twin-screw-extruder-temperature-profile-by-material","status":"publish","type":"page","link":"https:\/\/kerkepm.com\/es\/knowledge\/twin-screw-extruder-temperature-profile-by-material\/","title":{"rendered":"Twin Screw Extruder Temperature Profile by Material"},"content":{"rendered":"
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\n Home<\/a>\/<\/span>Knowledge<\/a>\/<\/span>Temperature profile by material\n <\/div>\n\n
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Process reference \u00b7 Barrel temperature<\/p>\n

Twin Screw Extruder Temperature Profile by Material: 16 Families, Zone by Zone<\/h1>\n

Zone 1, melt peak, metering and die ranges for sixteen material families \u2014 plus the eight ceilings that decide the profile before any setpoint is typed into the control panel. What follows is the reference temperature profile we start from at commissioning, material family by material family.<\/p>\n

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Updated<\/b> 4 November 2026<\/div>\n
Data base<\/b> 677 compounding patents, 2010\u20132020<\/div>\n
Reading time<\/b> 9 min<\/div>\n <\/div>\n <\/div>\n<\/div>\n\n
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Quick answer<\/h2>\n

A twin screw extruder barrel temperature profile is not a ramp to the die<\/strong>. It is set by whichever limit is lower: the temperature the polymer needs in order to melt, or the temperature its most heat-sensitive additive will survive. In a review of 677 masterbatch and compounding patents, 54% of profiles rise to a plateau, 40% peak at zones 4\u20136 and then drop 10\u201320 \u00b0C<\/strong>, and 6% are flat. Use the tables below to find the governing limit first, then set the zones around it. Every temperature profile on this page is written as a ladder of zone setpoints, so it can be copied onto a control screen zone by zone.<\/p>\n <\/section>\n\n

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677<\/b>patents with extractable process data<\/span><\/div>\n
96<\/b>profiles with 5+ zone setpoints<\/span><\/div>\n
16<\/b>material families covered<\/span><\/div>\n
8<\/b>hard temperature ceilings<\/span><\/div>\n <\/div>\n\n
\"Twin<\/figure>\n\n

The profile is capped by the weakest additive, not by the polymer<\/h2>\n

Every material has two temperature numbers that matter. The first is the melt window of the carrier resin. The second is the decomposition threshold of the additive that tolerates heat least \u2014 a flame retardant, a blowing agent, a biological active, a wood flour. The barrel profile has to satisfy both, and when they conflict, the additive wins.<\/p>\n\n

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Table 1.<\/b> The two limits that set every profile, with the additive ceiling that governs in practice.<\/caption>\n
Carrier<\/th>Needs to melt at<\/th>Weakest additive<\/th>Ceiling<\/th>Which one governs<\/th><\/tr>\n <\/thead>\n
PP \/ PE<\/td>160\u2013190 \u00b0C<\/td>ATH (HFFR cable compound)<\/td>200 \u00b0C<\/td>Additive \u2014 melt stays near 170 \u00b0C<\/td><\/tr>\n
PP \/ PA<\/td>190\u2013260 \u00b0C<\/td>Halogenated or P\u2013N flame retardant<\/td>220 \u00b0C<\/td>Additive \u2014 last zone capped at 220 \u00b0C<\/td><\/tr>\n
PE \/ starch blend<\/td>140\u2013175 \u00b0C<\/td>Starch (scorching)<\/td>180 \u00b0C<\/td>Additive \u2014 whole barrel below 180 \u00b0C<\/td><\/tr>\n
PVC dry blend<\/td>150\u2013170 \u00b0C<\/td>PVC itself (HCl release)<\/td>180 \u00b0C<\/td>Polymer \u2014 narrow 30 \u00b0C window<\/td><\/tr>\n
PE \/ PP<\/td>160\u2013200 \u00b0C<\/td>Organic antimicrobial<\/td>240 \u00b0C<\/td>Polymer \u2014 additive is not the limit<\/td><\/tr>\n
PET<\/td>260\u2013285 \u00b0C<\/td>None \u2014 hydrolysis is the limit<\/td>\u2014<\/td>Moisture, not temperature<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n

Ceilings are the published decomposition or processing limits of the additive class, not of a specific grade. Verify the grade datasheet before you lock a setpoint.<\/p>\n\n

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The practical consequence<\/h4>\n

When the additive ceiling sits below the polymer melt window, you cannot fix it with temperature. You fix it with geometry: a shorter L\/D, a gentler kneading configuration, a later side-feeder entry, or a two-stage setup where the heat-sensitive component is added downstream. Raising the barrel temperature to improve dispersion is the single most common way to destroy a heat-sensitive formulation.<\/p>\n <\/div>\n\n

Temperature profiles for eight masterbatch families<\/h2>\n

The ranges below come from 677 Chinese compounding patents (2010\u20132020) that disclose zone-by-zone setpoints. They describe published patent practice<\/em> \u2014 the lowest settings at which the inventors could make a saleable pellet \u2014 not optimised production values. Read the bottom of each range as a floor and the top as a ceiling.<\/p>\n\n

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Table 2.<\/b> Barrel temperature by masterbatch family. Die temperature follows the last zone by 0\u201320 \u00b0C.<\/caption>\n
Material family<\/th>\n Zone 1<\/th>\n Melt peak<\/th>\n Metering<\/th>\n Die<\/th>\n Curve<\/th>\n Governing limit<\/th>\n <\/tr>\n <\/thead>\n
Filler masterbatch<\/b>
CaCO\u2083 or talc, 70\u201385%<\/td>\n 		80\u2013120<\/td>190\u2013230<\/td>210\u2013230<\/td>210\u2013245<\/td>\n Step<\/span><\/td>\n Feed-throat bridging \u2014 not melting<\/td>\n <\/tr>\n
Color masterbatch<\/b>
PE carrier<\/td>\n 		90\u2013130<\/td>150\u2013180<\/td>140\u2013170<\/td>150\u2013180<\/td>\n Hump<\/span><\/td>\n Pigment dispersion vs carrier melt<\/td>\n <\/tr>\n
Antimicrobial \/ functional masterbatch<\/b><\/td>\n 165\u2013190<\/td>190\u2013240<\/td>195\u2013235<\/td>200\u2013230<\/td>\n Rise\u2013plateau<\/span><\/td>\n Organic actives 240 \u00b0C, silver 230 \u00b0C<\/td>\n <\/tr>\n
Flame-retardant PP \/ PA<\/b><\/td>\n 170\u2013190<\/td>190\u2013220<\/td>190\u2013210<\/td>190\u2013215<\/td>\n Rise\u2013plateau<\/span><\/td>\n FR decomposition above 220 \u00b0C<\/td>\n <\/tr>\n
ABS \/ PC\u2013ABS compound<\/b><\/td>\n 180\u2013200<\/td>190\u2013210<\/td>180\u2013200<\/td>200\u2013220<\/td>\n Flat \u00b110<\/span><\/td>\n PC flow below 230 \u00b0C; ABS degrades above 250 \u00b0C<\/td>\n <\/tr>\n
Conductive masterbatch<\/b>
carbon black \/ CNT<\/td>\n 		200\u2013215<\/td>225\u2013250<\/td>240\u2013250<\/td>240\u2013255<\/td>\n Rise<\/span><\/td>\n Viscosity for network dispersion, low screw speed<\/td>\n <\/tr>\n
Starch-based \/ biodegradable<\/b><\/td>\n 90\u2013150<\/td>140\u2013175<\/td>120\u2013150<\/td>120\u2013180<\/td>\n Hump<\/span><\/td>\n Starch scorches above 180 \u00b0C<\/td>\n <\/tr>\n
Anti-block \/ nucleating masterbatch<\/b>
PE carrier<\/td>\n 		110\u2013125<\/td>170\u2013190<\/td>130\u2013150<\/td>130\u2013170<\/td>\n Hump<\/span><\/td>\n Nucleating agent solubility; sharp cool-down after peak<\/td>\n <\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n

Scroll the table horizontally to see all columns.<\/p>\n

All values in \u00b0C at the barrel wall. Measured melt temperature runs above the setpoint at high screw speed and high filler loading \u2014 confirm with a probe at the die, not with the HMI.<\/p>\n\n

Seven more families: engineering plastics, cable, PET, TPE, WPC<\/h2>\n

These come from our application engineering files rather than the patent set, so they are wider ranges and should be treated as trial starting points.<\/p>\n\n

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Table 3.<\/b> Barrel temperature for engineering and specialty families. Ranges in \u00b0C.<\/caption>\n
Material family<\/th>\n Zone 1<\/th>\n Melt peak<\/th>\n Metering<\/th>\n Die<\/th>\n Governing limit<\/th>\n <\/tr>\n <\/thead>\n
PA66 + 30% glass fibre<\/b><\/td>240\u2013260<\/td>260\u2013280<\/td>255\u2013275<\/td>250\u2013270<\/td>Moisture <0.1%; fibre attrition rises with residence time<\/td><\/tr>\n
PBT \/ PET compound<\/b><\/td>235\u2013250<\/td>245\u2013265<\/td>240\u2013260<\/td>245\u2013260<\/td>Hydrolysis \u2014 dry to <50 ppm before the hopper<\/td><\/tr>\n
PVC cable compound<\/b><\/td>140\u2013155<\/td>155\u2013170<\/td>160\u2013175<\/td>165\u2013180<\/td>HCl release above 180 \u00b0C; 30 \u00b0C total window<\/td><\/tr>\n
HFFR, ATH-filled<\/b><\/td>140\u2013155<\/td>155\u2013170<\/td>160\u2013175<\/td>160\u2013175<\/td>ATH dehydrates above 200 \u00b0C \u2014 voids and loss of FR<\/td><\/tr>\n
PET bottle flake \/ fibre black masterbatch<\/b><\/td>260\u2013270<\/td>275\u2013285<\/td>278\u2013285<\/td>275\u2013285<\/td>IV loss; short residence, L\/D 40\u201348 with dedicated vacuum<\/td><\/tr>\n
TPE \/ TPV<\/b><\/td>180\u2013200<\/td>190\u2013215<\/td>190\u2013210<\/td>190\u2013210<\/td>TPV: stay inside the peroxide decomposition window<\/td><\/tr>\n
WPC, wood flour 40\u201360%<\/b><\/td>160\u2013175<\/td>175\u2013185<\/td>170\u2013180<\/td>175\u2013185<\/td>Wood scorches at 190 \u00b0C; flour dried to <2% moisture<\/td><\/tr>\n
Powder coating (no pelletizing)<\/b><\/td>80\u2013110<\/td>90\u2013120<\/td>90\u2013120<\/td>95\u2013120<\/td>Gelation at 120\u2013130 \u00b0C \u2014 gel in the barrel means a teardown<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n

Why 40% of profiles are not a straight ramp<\/h2>\n

Of the 96 patent profiles with at least five zone setpoints, only 6% are flat. The rest split into two shapes \u2014 and the second one contradicts what most operators are taught.<\/p>\n\n

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Table 4.<\/b> Distribution of profile shapes across 96 patent examples.<\/caption>\n
Shape<\/th>Share<\/th>What it looks like<\/th>When it is used<\/th><\/tr><\/thead>\n
Rise\u2013plateau<\/b><\/td>54%<\/td>Zones climb, then hold flat to the die<\/td>Melt-stable systems: ABS, filled PP, functional masterbatch<\/td><\/tr>\n
Rise\u2013peak\u2013drop (hump)<\/b><\/td>40%<\/td>Peak at zones 4\u20136, then \u221210 to \u221220 \u00b0C<\/strong>, die controlled separately<\/td>Heat-sensitive additives, high shear, high pigment or FR loading<\/td><\/tr>\n
Flat<\/b><\/td>6%<\/td>All zones within \u00b110 \u00b0C<\/td>Short barrels, low-melting systems<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n
\n \n \n \n \n \n Z1\n Z2\n Z3\n Z4\n Z5\n Z6\n Z7\n Z8\n Z9\n Z10\n Die\n \u00b0C\n \n \n \n \n Rise\u2013plateau \u00b7 54%\n \n \n \n Hump \u00b7 40%\n \n \n \u221210 to \u221220 \u00b0C after the peak\n Setpoint, not measured melt temperature\n \n
The two dominant shapes. The hump is not a mistake in the recipe: dropping 10\u201320 \u00b0C after the peak lowers melt viscosity, limits shear-heat build-up in the metering zone, and protects heat-sensitive additives that have already been dispersed.<\/figcaption>\n <\/figure>\n\n

The mechanism is straightforward. Shear heating in the metering zone adds energy on top of the wall setpoint, so a flat or rising profile ends up hotter than intended at exactly the point where residence time is longest. Dropping the last zones compensates for that, and it also reduces the risk of gels and odour in ABS and PC blends.<\/p>\n\n

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One rule that survives every material<\/h4>\n

Die temperature = last barrel zone + 0 to 20 \u00b0C.<\/b> Fifteen of the nineteen fully documented patent examples obey it. The die runs slightly hotter to cut viscosity at the pressure build-up point, but it is never the hottest part of the machine. If you find yourself setting the die 30 \u00b0C above the last zone, the screw configuration is not building pressure properly.<\/p>\n <\/div>\n\n

Three setpoint ladders you can start from<\/h2>\n

Barrel length and zone count are tied: our KTE barrels use 4:1 L\/D per section, so L\/D 40 is a ten-zone barrel, L\/D 44 is eleven, L\/D 48 is twelve. The ladders below are ten-zone examples derived from the ranges above. They are starting points for a trial, not production recipes \u2014 screw geometry, filler loading and screw speed all shift the result.<\/p>\n\n

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Table 5.<\/b> Ten-zone starting ladders, \u00b0C. Validate on your own barrel before production.<\/caption>\n
Material<\/th>\n Z1<\/th>Z2<\/th>Z3<\/th>Z4<\/th>Z5<\/th>\n Z6<\/th>Z7<\/th>Z8<\/th>Z9<\/th>Z10<\/th>\n Die<\/th>Screw<\/th>\n <\/tr>\n <\/thead>\n
75% CaCO\u2083 in PE<\/b>
L\/D 44<\/td>		95<\/td>150<\/td>195<\/td>215<\/td>220<\/td>220<\/td>218<\/td>215<\/td>215<\/td>215<\/td>225<\/td>325 rpm<\/td><\/tr>\n
PA66 + 30% GF<\/b>
L\/D 40\u201344<\/td>		245<\/td>255<\/td>265<\/td>270<\/td>275<\/td>275<\/td>272<\/td>268<\/td>265<\/td>262<\/td>265<\/td>300 rpm<\/td><\/tr>\n
PET bottle flake<\/b>
L\/D 40\u201344<\/td>		262<\/td>268<\/td>272<\/td>276<\/td>280<\/td>282<\/td>280<\/td>278<\/td>276<\/td>274<\/td>278<\/td>low shear<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n

Screw speed is included because it changes the profile indirectly: each 100 rpm adds shear energy, which the wall setpoints then have to subtract. A profile is only valid at one speed band.<\/p>\n\n

Eight hard ceilings<\/h2>\n

These are the numbers that separate a working profile from a wrecked barrel. Every one of them appears repeatedly in the patent set and in our own trial records.<\/p>\n\n

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Table 6.<\/b> Temperature ceilings by system and the failure they prevent.<\/caption>\n
System<\/th>Ceiling<\/th>What happens above it<\/th><\/tr><\/thead>\n
PVC dry blend<\/b><\/td>zone 1 \u2264 130\u2013150 \u00b0C<\/td>HCl release, black specks, barrel corrosion, colour drift<\/td><\/tr>\n
Starch-based compound<\/b><\/td>180 \u00b0C, all zones<\/td>Scorching, yellowing, burnt odour that no additive hides<\/td><\/tr>\n
Halogenated \/ P\u2013N flame retardant<\/b><\/td>220 \u00b0C, last zone<\/td>FR decomposition, gas evolution, loss of flame rating<\/td><\/tr>\n
ATH-filled HFFR<\/b><\/td>200 \u00b0C, melt<\/td>ATH dehydration: voids, surface defects, FR failure<\/td><\/tr>\n
PET<\/b><\/td>260 \u00b0C floor, short residence<\/td>Below 260 \u00b0C no melt; too long above 280 \u00b0C loses IV<\/td><\/tr>\n
Organic antimicrobial<\/b><\/td>240 \u00b0C (silver: 230 \u00b0C)<\/td>Active burns off; the masterbatch tests clean and performs at zero<\/td><\/tr>\n
Filler masterbatch, zone 1<\/b><\/td>80\u2013120 \u00b0C<\/td>Carrier softens in the feed throat, powder bridges, screws starve<\/td><\/tr>\n
Powder coating<\/b><\/td>120 \u00b0C, melt<\/td>Gelation inside the barrel \u2014 a full teardown, not a setpoint change<\/td><\/tr>\n <\/tbody>\n <\/table>\n <\/div>\n\n

How to build a twin screw extruder temperature profile in five steps<\/h2>\n
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  1. Find the polymer melt window.<\/b> Use the datasheet or a DSC curve. This gives you the melt peak range and the minimum die temperature. For semi-crystalline resins the window is narrow; for amorphous resins it is wide and forgiving.<\/li>\n
  2. Find the lowest additive ceiling and subtract 10\u201320 \u00b0C.<\/b> That number caps your metering zone. If it is below the polymer melt requirement, stop: the formulation needs a different screw design, not a different setpoint.<\/li>\n
  3. Set zone 1 from the feed, not from the melt.<\/b> Powder-heavy feeds want 40\u201360% of the melt temperature in zone 1 \u2014 filler masterbatch at 80\u2013120 \u00b0C, colour masterbatch at 90\u2013130 \u00b0C. The purpose is to keep the carrier glassy so the powder does not bridge.<\/li>\n
  4. Choose ramp or hump.<\/b> Ramp to a plateau when the system is melt-stable. Use a hump when there is a heat-sensitive additive, a high pigment load, or a high-viscosity melt that will shear-heat in the metering zone.<\/li>\n
  5. Set the die at last zone + 0\u201320 \u00b0C, then verify with a probe.<\/b> Run at production screw speed for 15 minutes before taking the reading. If measured melt temperature exceeds the additive ceiling, lower the last two zones \u2014 not zone 1.<\/li>\n <\/ol>\n\n

    Three mistakes we see on start-up<\/h2>\n

    1. Copying a profile from another machine<\/h3>\n

    The same material on a 40:1 barrel and a 48:1 barrel needs different numbers, because residence time and shear history differ. A profile is a property of the material and<\/em> the screw geometry. When a customer sends us a setpoint list from an old line, we treat it as a hypothesis and re-tune it on a trial run.<\/p>\n

    2. Ramping every zone up to the die<\/h3>\n

    It looks tidy on the control screen and it over-heats the metering zone. The results are gels in ABS, odour in PP, and yellowing in anything with an organic additive. Forty per cent of the published profiles deliberately drop after the peak \u2014 that is not sloppiness, it is compensation for shear heat.<\/p>\n

    3. Setting zone 1 at melt temperature<\/h3>\n

    With a 75% mineral fill, a hot feed throat softens the carrier before the screws can convey it. Output falls, torque fluctuates, and the operator adds more feeder speed, which makes the bridging worse. Zone 1 at 80\u2013120 \u00b0C is the fix, and it is counter-intuitive enough that it is worth writing on the machine.<\/p>\n\n

    Five rules that survive a material change<\/h2>\n

    When the formulation changes and there is no time for a trial, these five rules have kept more lines running than any table on this page. They are the short form of the twin screw extruder temperature profile logic above.<\/p>\n