Insulation materials for transformers, motors & reactors · Since 2008 ✉ liuxinlx521@gmail.com WhatsApp +8615690899924
Insulation materials production at Hengsheng Technology
Insulation materials

Electrical Insulation Materials

27 materials across five families: transformer insulation, flexible composites, laminates and boards, impregnating varnishes, and sleevings and binding tapes. Every product page lists technical data, temperature class and applications.

Use the filter to narrow the range, or scroll to a category. Each product page is linked in the XML sitemap.

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12 products

Transformer Insulation Materials

Insulation in a transformer is not a standalone material; it has to survive winding, clamping, drying, vacuum impregnation and decades of thermal and electrical stress under oil. This category covers the paper, dotted tape, board, tube, stay and cushion products that sit inside oil-immersed power and distribution transformers, plus the film composites and structural parts used in dry-type units.

DDP Diamond Dotted Paper - electrical insulation material by Hengsheng Technology
Class A (105°C)

DDP Diamond Dotted Paper

Diamond-pattern epoxy dots on both faces of Class A electrical kraft paper. The dots bond layers together after heat curing while the un-dotted area…

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Diamond Dotted AMA - electrical insulation material by Hengsheng Technology
Class B (130°C)

Diamond Dotted AMA

A cable paper / PET film laminate with a diamond-pattern adhesive that cures into a stable bond after 140°C heat treatment. Designed for HV-LV…

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Crepe Paper - electrical insulation material by Hengsheng Technology
Class A (105°C)

Crepe Paper

Crepe insulating paper with high elongation and a soft, conformable hand for wrapping magnet wire, layer insulation, current transformers, RIP…

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Semi-Conductive Crepe Paper - electrical insulation material by Hengsheng Technology
Class E (120°C)

Semi-Conductive Crepe Paper

Black semi-conductive wrinkled paper made from insulating cable paper, with stable surface resistivity for field grading and shielding in…

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Crepe Paper Tube - electrical insulation material by Hengsheng Technology
Class A (105°C)

Crepe Paper Tube

Crepe paper tube made from 100% sulfate insulating wood pulp. Soft and bendable in any direction without cracking, for tap-lead and screw insulation…

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DDM Diamond Dotted Mylar® - electrical insulation material by Hengsheng Technology
Class B (130°C)

DDM Diamond Dotted Mylar®

Electrical polyester film with a diamond-shape epoxy resin dotted on both sides. The latent hardener only activates on heating, so the film can be…

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6 products

Flexible Composite Materials

Flexible composites combine a film core for dielectric strength with a fibrous facing for resin absorption, abrasion resistance and mechanical protection. The facing material - polyester non-woven, Nomex® aramid paper or domestic aramid paper - sets the temperature class and the cost level, while the film thickness controls breakdown voltage.

Prepreg DMD - electrical insulation material by Hengsheng Technology
Class F (155°C)

Prepreg DMD

PET film laminated to two layers of polyester non-woven and impregnated with a B-stage epoxy resin. The resin reflows and bonds during impregnation…

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SHS Prepreg - electrical insulation material by Hengsheng Technology
Class H (180°C)

SHS Prepreg

SHS prepreg is a flexible composite of polyimide film coated with a Class H adhesive and a polyester fiber non-woven, impregnated with a semi-cured…

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4 products

Laminates, Boards & Films

Rigid laminates carry the mechanical load in coil clamping, yokes, barriers and mounting structures. They are supplied as stock sheet for in-house machining or as finished parts machined to your drawing. Film and netting products cover the thin, flexible end of the same job.

Polyester Film 6020 - electrical insulation material by Hengsheng Technology
Class B (130°C)

Polyester Film 6020

6020 polyester film is a biaxially oriented polyethylene terephthalate (PET) film. High dielectric and mechanical properties, transparent, supplied…

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6 products

Impregnating Varnishes

A varnish has to do two jobs at once: fill and seal the insulation system, and bond the winding into a mechanically solid unit. Viscosity, gel time, curing window and bond strength determine whether the product fits an existing dip tank, a VPI line or a trickle line.

6 products

Sleevings & Binding Tapes

Sleevings protect and insulate lead wires and connections; binding tapes hold coils, laminations and leads in place through impregnation and drying. Temperature class, coating chemistry, shrinkage and varnish absorption are the deciding factors.

Electrical Cotton Tape - electrical insulation material by Hengsheng Technology
0.25–0.35 mm

Electrical Cotton Tape

Electrical insulation cotton tape made from pure cotton fibre. Soft and conformable without damaging conductor insulation, with good varnish…

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Fiberglass Tape - electrical insulation material by Hengsheng Technology
500°C material

Fiberglass Tape

Fiberglass insulation tape woven from non-alkali glass fiber yarn, plain or twill. High strength and low elongation for stable binding and…

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