Polyurethane Heated Hose (JCH)

JCH is the electrically heated hose our catalog lists for polyurethane equipment: a heated, insulated line used on laminating machines of various types and on one- and two-component (1K/2K) polyurethane equipment and its connections. The catalog calls it the polyurethane hose and places it in the low-temperature, low-pressure group of the heated range. Maximum heat resistance is up to 180 °C (356 °F), and higher temperatures are custom on request. The catalog prints seven bore sizes for this product, 1/4" to 1".

• Max heat resistance180 °C / 356 °F, higher on request
• Pressure classlow pressure, per-size table below
• Bore1/4"–1" (7 sizes)
• Supply110 / 220 / 380 Vac, 12 Vdc
• SensorJ, K, Ni120, PT100, PT1000

Overview

This hose carries polyurethane material from the supply or metering unit to the point of use on laminating machines and 1K/2K polyurethane equipment, and holds it at a set temperature on the way. In general practice the viscosity of these materials follows their temperature: on a one-component system a cold section of hose changes the flow rate, and on a two-component system it can shift the ratio delivered at the mix head. For that reason the hose is heated along its whole length rather than only near the exit.

The build is aimed at that. The heating layer is made of heating elements braided uniformly around the hose, so the aim is a small temperature difference along the inner wall instead of a hot middle and colder ends. The insulation is chosen from high-insulation-efficiency materials with surface temperature in mind, so the hose does not lose on the outside the heat the process needs inside. The parts of a run that cool first are usually the ends — the fitting at the machine, the short section where the lead exits, and any length hanging free where air moves past it — so it is worth checking those with a contact thermometer during commissioning rather than trusting the controller's reading of the middle of the run.

Three habits from general polyurethane practice are worth saying out loud, because they are process decisions rather than hose specifications. Two components are normally run in separate heated lines all the way to the mix head and only meet there, so the number of lines and their lengths are part of the machine layout. Mixed material must not sit in a warm line beyond its working time, or it will be partly reacted by the time it reaches the dispensing point. And moisture-sensitive components want a sealed, dry line: an open end left overnight is an invitation for the next shift's first parts to be wrong. Purging or cleaning out at the end of a shift, the setpoints and where the sensor sits are set by your material supplier and your machine builder. Treat those notes as field practice; they are not catalog data.

What the hose is: a heated transfer line from the low-pressure group, on the same T-STD rows used across the heated range, built to match the customer's machine and the material it runs. What it is not: a metering, mixing or dispensing device, and not a line for a high-pressure glue pump — if the pump is the constraint, the sealant dispensing build is the closer match. If the material is a hot-melt or PUR adhesive fed from a melter rather than supplied as a two-component system, see the hot-melt hose. The bore, length and fittings are chosen around the material and the machine.

Specifications

All values as printed in the Jingcheng 2025 electrically heated hose catalog.

Size and pressure table

All values as printed in the Jingcheng 2025 electrically heated hose catalog.

Full catalog: Heated hose catalog (PDF, 4.9 MB)

Materials and construction

• Inner tube: specified on the order form by model-code letter – B stainless corrugated tube, TB PTFE hose with stainless braid, T PTFE hose, X special material. Which one suits a polyurethane line depends on the material you run, the setpoint, how the line is cleaned out and the machine it feeds; tell us those and we will propose the tube.
• Heating layer: heating elements braided uniformly around the hose, to minimise differences in temperature distribution along the inner wall.
• Insulation: high-insulation-efficiency material, selected with surface temperature in mind.
• Outer surface: the hose in the photo has a black textile-braided outer cover, with clear plastic wrap bands and two short silver metal bands on the coil. The catalog page does not name the cover material, so it is specified on the drawing for your machine rather than guessed from a picture.
• Sensor: a temperature sensor in the assembly, matched to your controller. Type J or K, Ni120, PT100 or PT1000, agreed on the drawing.
• End fittings and leads: a metal fitting at each end, and an electrical lead exiting near one end. On the photo hose the coil loop carries a black braided cable sleeve with a blue tracer, the lead and hose bundle carries a black cylindrical sleeve, and the loose wires end in fork terminals. The hose end in the photo shows two yellow hoses and one black hose finishing in silver threaded fittings with blue caps. Thread standard and size are specified per end.

Temperature and pressure notes

180 °C (356 °F) is the maximum heat resistance printed for this product; the catalog marks higher temperatures as custom, on request. That is lower than the 230 °C (446 °F) printed for the wax and laminator builds in the same low-temperature, low-pressure group. That is a difference in what each build is rated for, not a ranking — the right hose is the one rated for the temperature your process actually runs at, and for polyurethane work the material supplier's processing temperature is normally the number to start from.

The catalog places this hose in the low-temperature, low-pressure group. That is a grouping of the range, not a 100 °C ceiling — other products in the same group are printed at different maximums, and the figure for this hose is 180 °C. The useful number for your line is the material temperature your supplier specifies at the dispensing point, which is normally below it.

Pressure is given per size in the table above, from 173 bar working at 1/4" down to 75 bar at 1". These are the hose ratings printed for the T-STD rows; the rating of the finished assembly is confirmed on the quotation drawing. The per-size minimum bend radii run from 30 mm at 1/4" to 300 mm at 1". The catalog order form lists pressure steps of 4, 10, 20 and 35 MPa, or other. Send the pressure the supply pump actually reaches, including any pulse, and the tightest bend on the route.

Keep the ambient inside −40 to +55 °C (−40 to 131 °F) at 85 % relative humidity or less and 86–106 kPa, and keep the surroundings free of gases that corrode metal or damage insulation, of conductive media and of severe mould; anything outside that is a custom build. Only trained personnel should operate the hose, and modification not agreed with us voids the warranty. Do not twist the hose laterally during or after installation. Surface temperature is part of the build, but the hose still gets warm in service — route it where nothing that minds heat will rest against it, and keep it off the machine frame where it can chafe.

Applications

The catalog application is polyurethane equipment: laminating machines of various types, and one- and two-component polyurethane equipment and its connections. Over the years this line has built up a steady customer base on consistent quality and service. In practice that covers:

• Material supply lines on laminating machines that run polyurethane systems
• One-component polyurethane equipment, where the whole run has to hold one temperature
• Two-component equipment, where each component runs in its own heated line to the mix head
• Lines that run through idle periods between jobs and have to come back to temperature without a cold section

Laminators appear in the catalog text for this product and for the solvent-free laminator hose, so it is worth being clear about which page you are on. This is the catalog's polyurethane-equipment line, printed at 180 °C; the solvent-free laminator hose is a separate line, printed at 230 °C and listed for solvent-free laminating machines. Neither is the better hose in general: pick by the material you run and the machine it feeds, and if you are unsure, send both details and we will tell you which catalog line it falls under.

It is not the right hose for a hot-melt or PUR adhesive melter machine, which has its own build — see the hot-melt hose. Nor for a high-pressure glue or sealant pump, where the hose has to take the pump's pulses — that is the sealant dispensing build. And it will not hold a temperature on its own: the assembly carries a sensor, and the controller has to be set up for the material.

Options and related builds

• Before you specify: the heated hose specification checklist lists the inputs we need for a quotation, in the order we ask for them.
• Solvent-free laminating machines: the solvent-free laminator heated hose is the catalog's laminator line, up to 230 °C on the same T-STD rows.
• Melter-fed adhesive: for hot-melt and PUR adhesive machines see the hot-melt adhesive hose, which is listed on the same T-STD rows, 1/4"–1".
• Low temperature, higher pressure: the automotive sealant dispensing heated hose is the low-temperature, high-pressure build for glue and sealant pumps.
• Same group, different duty: the paraffin wax heated hose for 3D printers is another low-temperature, low-pressure build in the catalog.
• Other heated builds: browse the Low-Temperature Heated Hose — Low Pressure and Heated Low Pressure Hose families.

How to order

A JCH part number carries the main choices, so the fastest way to order is to quote one. The catalog example, given for the whole JCH range, is JCH-200-16-B-3X220-P2-8:

1. 200 – working temperature in °C. 200 means 200 °C. This hose is printed at up to 180 °C, so a code for it carries 180 or a lower setpoint, unless a higher-temperature custom build has been agreed.
2. 16 – inner tube bore in mm. 16 means Φ16 mm, which sits inside this product's 1/4"–1" bore range.
3. Inner tube letter – B is a stainless corrugated tube, TB is PTFE hose with stainless braid, T is a PTFE hose, X is a special material.
4. Supply – 220 means 220 V, 3X220 means three-phase four-wire 220 V.
5. Sensor code – P2 is PT100 two-wire, P3 is PT100 three-wire, K is type K, J is type J, W is no sensor, T is a special sensor.
6. Pressure – working pressure in MPa. 8 means 8 MPa.

If you do not have a part number, send these instead:

1. Bore and length, the number of pieces, and the distance the line has to cover on the machine.
2. The polyurethane material you run, the temperature your supplier specifies at the dispensing point, and whether it is one- or two-component.
3. The setpoint you want and the highest ambient the run passes through.
4. Supply pressure at the pump, including any pulse, and the controller or cabinet the hose plugs into.
5. Sensor type and wiring, if the cabinet dictates it, plus the pin table if one exists.
6. End fittings at each end: thread standard, size, angle, with a photo or part number if you have one.
7. The route – how the hose is supported at the machine and at the supply, and the tightest bend on it.

If a drawing exists, send it. We propose the specification against it, you confirm it with the quotation, and production follows the confirmed specification.

Frequently asked questions

What is a polyurethane heated hose?

A heated, insulated hose for polyurethane equipment: laminating machines of various types, and one- and two-component polyurethane equipment and its connections. It combines a heated inner hose, a braided heating layer, insulation, an outer cover, a metal fitting at each end and an electrical lead. The catalog lists it as the polyurethane hose, in the low-temperature, low-pressure group.

What temperature does it run at?

Maximum heat resistance is up to 180 °C (356 °F), with higher temperatures custom on request. The low-temperature grouping does not cap the hose at 100 °C — the figure for this product is 180 °C. Order the setpoint your material supplier specifies at the dispensing point, not the maximum of the hose.

Which bores are available?

Seven are printed for this product: 1/4", 5/16", 3/8", 1/2", 5/8", 3/4" and 1". The order form also lists Φ8, Φ12, Φ16, Φ19 and Φ25 mm with an "other" option for the JCH range.

How much pressure does it take?

The catalog places it in the low-temperature, low-pressure group; it is not one of the heated high-pressure builds. Per-size working and burst pressures are printed in the table above, from 173 bar working at 1/4" to 75 bar at 1"; the rating of the finished assembly is confirmed on the quotation drawing. Send the pressure your supply pump actually reaches, including any pulse, when you enquire.

Will the material cure or set in the hose?

That depends on the material, not on the hose. Mixed two-component material starts its working time when the components meet and should not sit in a warm line longer than that time; any material left in the bore at the end of a shift should be purged or cleaned out before the next run. Those are general polyurethane practices — your material supplier and machine builder set the limits.

How is it different from the solvent-free laminator hose?

Both are heated hoses from the same low-temperature, low-pressure group and both appear on laminating machines, but they are separate catalog lines. This is the polyurethane-equipment line, printed at up to 180 °C; the solvent-free laminator hose is printed at up to 230 °C and listed for solvent-free laminating machines. Choose by the material and the machine, and send both details if it is not obvious.

Source: Jingcheng 2025 electrically heated hose catalog, p.11 polyurethane hose (feature box, size table and photo) and p.4 order form and model code, and our published business policies. Notes on viscosity following temperature, running two components in separate lines to the mix head, working time of mixed material, keeping moisture-sensitive components in a sealed dry line, purging at shift end and sensor placement are general engineering practice.