Solvent-Free Laminator Heated Hose (JCH)

JCH is the electrically heated hose our catalog lists for solvent-free laminating machines: a heated, insulated line that carries adhesive from the supply point to the coating unit and keeps it at a steady temperature on the way. The catalog calls it the solvent-free laminator hose and places it in the low-temperature, low-pressure group of the heated range. Maximum heat resistance is up to 230 °C (446 °F), and higher temperatures are custom on request. The catalog prints four bore sizes for this product, 1/4" to 1/2".

• Max heat resistance230 °C / 446 °F, higher on request
• Pressure classlow pressure, per-size table below
• Bore1/4"–1/2" (4 sizes)
• Supply110 / 220 / 380 Vac, 12 Vdc
• SensorJ, K, Ni120, PT100, PT1000

Overview

A solvent-free laminating line applies adhesive with no solvent to evaporate, so the adhesive reaches the coating unit exactly as it left the supply. There is no drying tunnel downstream to correct a viscosity drift: whatever temperature the adhesive is at when it arrives is the temperature it is applied at, and coat weight follows the adhesive's viscosity, which in turn follows its temperature. That makes the line temperature a process variable on these machines, not a handling detail, and it is the reason the hose is heated along its whole length rather than only at a heated block near the coating head.

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.

Two habits from general laminating practice are worth saying out loud, because they are process decisions rather than hose specifications. A mixed two-component adhesive starts its working time when the components meet; it should not sit in a warm line longer than that working time, or it will be partly reacted by the time it reaches the nip. And a line that is not purged at the end of a shift leaves adhesive sitting in the bore, which on the next start has to be pushed out or cleaned out before good product is made. Where the sensor sits, what the setpoints are and how the line is purged are set by your adhesive 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 adhesive it runs. What it is not: a metering or mixing 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 a laminating supply, see the hot-melt hose. The bore, length and fittings are chosen around the adhesive 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 laminating line depends on the adhesive 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 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 lead end carries a black cylindrical sleeve labelled “OUT” with an arrow, a bundle of blue, orange and white wires, and a black braided sleeve with a blue tracer around a second bundle. Thread standard and size are specified per end.

Temperature and pressure notes

230 °C (446 °F) is the maximum heat resistance printed for this product; the catalog marks higher temperatures as custom, on request. The catalog places this hose in the low-temperature, low-pressure group of the heated range. 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 230 °C. The useful number for your line is the adhesive temperature specified for the coating unit, which is normally well below it.

Pressure is given per size in the table above, from 173 bar working at 1/4" down to 118 bar at 1/2". 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 150 mm at 1/2". 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 solvent-free laminating machines of various types, imported and domestically built. In practice that covers:

• Adhesive supply lines on solvent-free laminating machines, from the supply point to the coating unit
• Imported machines where the hose has to match an existing fitting and lead layout
• Domestic machines being built or upgraded, where the line is specified with the machine
• Lines that run through idle periods between jobs and have to come back to temperature without a cold section

Jingcheng has long-term, stable supply relationships with several brands in this segment of the industry; the catalog states that without naming them, and we keep it that way. If you are building or servicing a machine, send us the fitting details and we quote against them.

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 coating temperature on its own: the assembly carries a sensor, and the controller has to be set up for the adhesive.

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.
• 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 the other low-temperature, low-pressure build on this page of 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.
2. 16 – inner tube bore in mm. 16 means Φ16 mm. That size is outside the range of this product, which goes up to 1/2"; for a 1/2" bore, for example, replace 16 with 12.
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 adhesive you run, the temperature your supplier specifies at the coating unit, 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 solvent-free laminator heated hose?

A heated, insulated hose for solvent-free laminating machines that carries adhesive from the supply point to the coating unit at a controlled temperature. 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 solvent-free laminator hose, in the low-temperature, low-pressure group.

What temperature does it run at?

Maximum heat resistance is up to 230 °C (446 °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 230 °C. Order the setpoint your adhesive supplier specifies at the coating unit, not the maximum of the hose.

Which bores are available?

Four are printed for this product: 1/4", 5/16", 3/8" and 1/2". 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 118 bar at 1/2"; 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 adhesive cure or set in the hose?

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

Can it be supplied with my machine's fittings and controller?

Yes. Both ends are specified separately on the order – US, British or metric threads, or another type – and made to order. The sensor is matched to your controller: type J or K, Ni120, PT100 or PT1000, with PID control and SSR or thyristor output on our controllers.

Source: Jingcheng 2025 electrically heated hose catalog, p.10 solvent-free laminator hose (feature box and size table) and p.4 order form and model code, and our published business policies. Notes on adhesive viscosity following temperature, working time of a mixed two-component adhesive, purging the line at shift end and sensor placement are general engineering practice.