Factory & Manufacturing

Unwind. Wide rolls of high-grade PET film are loaded onto precision shafts so the substrate feeds forward without wrinkles, slack or edge wander — a crease at the start of the roll would become a weak point under a heated floor for decades.

Screen printing. The graphene–carbon composite paste — prepared in our own mixing area to a recipe held by the engineering team — is applied in a fixed mesh pattern, with batch tickets tracing every raw carbon back to its certificate.

Drying and cure. The printed layer sets under controlled temperature so the carbon network bonds evenly and the resistance reads true.

Busbar lamination. Silver–aluminium composite busbars are bonded along both edges so current enters the resistive layer across its full width — the engineering reason the film heats uniformly edge to edge instead of burning hot near the leads.

Encapsulation. The active layer is sandwiched between protective films and edge-sealed so moisture cannot reach the printed circuit.

Die-cutting and slitting. Film is cut to the ordered width.

Termination. Power leads are fixed to the busbars with mechanical and electrical joints, strain relief moulded on, and the joint isolated.

Electrical bench. Every element is resistance-measured against its design value; sampled lots receive dielectric strength and insulation tests before the aging room and final packing.

For buyers this matters in two practical ways: replacement rolls ordered in year three perform the same as rolls received in year one, and because we control formulation and print, we can tune the film for your application — standard underfloor wattages, higher-density industrial builds, or PTC self-limiting variants. Browse the finished range on the graphene heating film product page.

The mat line laminates the film onto a reinforced backing mesh, applies the self-adhesive underside, trims the edges and fixes cold leads with strain relief. Every finished mat undergoes the same resistance test and dielectric check as the film rolls before it is boxed.

Because the mat arrives pre-sized rather than as a roll to cut on site, installation time on a renovation project drops sharply. The line also produces thinner retrofit constructions for constrained build heights, including the aluminium-clad variants used under stone and tile.

All mat constructions are listed in the underfloor heating category, with wattage and backing options explained per product.

Where film cannot go — inside screed, concrete pours, gutters and pipe runs — we manufacture heating cables. The line draws and lays the alloy resistance conductor, wraps it in insulation, adds the metallic shield and outer jacket, and forms the double-conductor arrangement that keeps electromagnetic emissions low and the heater field-safe for buried installation.

The line then cuts cables to ordered lengths, bonds cold leads, and tests each finished cable loop for resistance, continuity and insulation before packing.

Cable orders are common for renovation screeds, outdoor freeze-protection and custom-length projects. Every double-conductor heating cable ships with connection guidance matched to a control from the thermostats and controls category. Construction details are on the technology page.

A dedicated short line handles the aluminium film heating mat and similar special constructions, where the heating layer is bonded to an aluminium spreader layer to flatten residual temperature gradients and protect the element mechanically. These products are the retrofit answer for old buildings where floor height cannot change, and for stone surfaces that benefit from the extra protection of the metal layer.

The same line produces customer-specific sandwich constructions for OEM programmes — a different protective film, a different adhesive system, a different lead exit — without re-tooling the main film line. See the range on the aluminium film heating mat page.

We assemble and test smart thermostats on a controlled line separate from the high-voltage element lines, because controls demand EMC discipline and firmware discipline rather than printing. The thermostat area covers PCB inspection, housing assembly, button and touch-panel testing, WiFi and app pairing checks, sensor calibration against reference probes, and final packaging.

Every unit that leaves this area has passed a function bench test: relay switching, floor-sensor reading, air-sensor reading and display behaviour are verified before the box is sealed. This is why we can support distributors with spare units, firmware questions and wiring advice — the people answering your support call assembled the product.

The current certified range — WiFi and app-controlled models with floor and air sensors — is listed on the smart thermostat product page.

Pet heating pads are built on the film line’s precision but finished on a dedicated assembly bench that focuses on the product’s specific safety profile: uniform bottom heat, enclosed use inside terrariums and pet beds, and 24/7 near-animal operation.

Pads use the low-EMF shielded construction, 10-speed temperature control units and strain-relieved leads, and are individually tested again after assembly because a pet pad operates in a sealed, insulated environment where over-temperature risk must be designed out rather than managed.

The finished pads are listed in the pet and plant heating category alongside plant propagation mats, which share the same low-wattage, even-heating philosophy.

Online inspection cameras and probe stations sit between stations rather than after them, so a drift in print density is corrected on the hour, not discovered at final inspection. An aging-test room runs samples from every batch continuously for an extended soak while temperature and current are logged.

We do not publish equipment brand names — what matters for your audit is that every station affecting safety-critical parameters (resistance, insulation, termination) is instrumented and records its measurements into the batch folder.

Yes. Buyers, distributors and auditors are welcome at our Huangdao District campus, and we also run live video factory tours when travel is not practical. Tell us your agenda in advance and we will have samples, certificates and a live batch record ready for you.

Sample rolls and cut pieces start small for evaluation; the production MOQ for private-label orders depends on the product and packaging artwork, and is confirmed in writing on your quotation. Repeat distributors benefit from rolling-stock arrangements that shorten reorder lead times.

Every shipment carries a commercial invoice and packing list, plus the relevant certification set: ISO 9001 / ISO 14001 documents, SGS RoHS reports, ZCT EMC / IEC 60335 reports and CNAS inspection reports. See the full document request list.

Yes. Because we print and laminate on our own lines, we customise widths, cut lengths, wattage builds, voltage, private-label packaging and PTC self-limiting variants in-house. Our engineers stay on the call from sample to mass production rather than passing you to a middleman.

Standard reorders from rolling stock ship fastest; custom cut-to-length and OEM orders are scheduled after confirmation with a stated completion date on the proforma invoice. Sea, air and express options are quoted so you can match speed to your project schedule.

Yes. The same order can include insulation underlay, mounting tape, sensors, connection kits and complete installation kits from the accessories category, which keeps your bill of materials on one commercial invoice.