[ Products · Insulation Film ]
Electrical Insulation Film
Polyester, polyimide and DDP composite films — slit to your working width.
Insulation film gives the highest dielectric strength per unit thickness of any material in this catalogue, which is why it appears as the barrier layer inside almost every composite insulation construction.
Polyester film is the volume material — mechanically tough, dimensionally stable, and used at Class B and F. Polyimide film carries far higher continuous temperature capability and appears in traction, aerospace and high-density motor designs where space is the binding constraint.
Film is rarely used bare in a slot; it is usually laminated with a non-woven or paper face for handling and to prevent cut-through against slot edges. If you are specifying bare film, tell us the application so we can flag whether a composite is the safer construction.
[ Selection ]
How to choose within this category
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Thickness against slot fill
Film thickness trades directly against copper fill. Going thinner recovers slot space but reduces margin against cut-through and corona.
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Bare film or composite
Bare film handles poorly on winding lines and is vulnerable at slot edges. A film-and-nonwoven composite usually costs less in total once scrap is counted.
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Width and roll length
Slitting to working width is standard. Tell us your line width and preferred roll diameter so the rolls fit your equipment.
Typical applications
[ Buying questions ]
Ordering insulation film from China
Are you a manufacturer or a trading company for insulation film?
Both. Material comes from our production partners in Xuchang and Jiaozuo, which gives factory-level pricing and the ability to verify what you are buying. Because we are not tied to one line, we can also tell you when something is better made elsewhere instead of selling you what we happen to run.
What is the minimum order quantity?
It depends on the item and whether it is a stock grade or made to your width. Small quantities across several materials usually consolidate into a workable shipment even where no single line would clear a factory minimum. Send your list and we will tell you what is workable.
Can we get samples before ordering?
Yes, and for a first order we would encourage it. Sample material is generally free; freight arrangement varies by destination and we will confirm which applies when you enquire.
Can you supply cut or slit to our dimensions?
Yes. Slitting rolls to working width and cutting sheet to drawing are both standard. Tell us the dimensions and, for rolls, your preferred core and roll diameter so the material fits your equipment.
What are the payment terms and lead time?
For a first order, terms are usually a deposit with the balance against shipping documents. Lead time depends on whether items are stock grades or made to your specification — we will give a date against your actual list rather than a general figure.
Which ports do you ship from, and can you quote DDP?
Most shipments go through Qingdao or Shanghai. We can quote FOB, CIF or DDP depending on how much of the import side you want to handle. Tell us your destination port and we will confirm routing and a realistic door-to-door time.
Do you provide test reports or certification?
What is available varies by material and production source. Rather than claim blanket coverage, tell us what your application or your customer requires and we will confirm what can be provided for that specific material before you order.
Can this category ship together with other materials?
Yes — mixed containers across categories are standard for us rather than an exception, and for most transformer and motor builders it is the sensible way to buy.
Tell us what you need to buy
Send the grades, thicknesses and quantities — or just describe the machine you build. We reply within one working day, and we will tell you plainly if something is outside what we can supply well.