Insulating Kraft Paper Sleeves
Insulating kraft paper sleeves are convolute-wound paper tubes used as lightweight electrical insulation, winding supports and internal fuse components. The paper grade, adhesive, wall build and moisture control should be selected for the finished assembly rather than from dimensions alone. As a direct manufacturer and supplier, we provide Insulating Kraft Paper Sleeves in made-to-drawing sizes with low minimum order quantities and fast sampling for both prototype and production runs.
Specification points
| Item | Confirm for quotation |
|---|---|
| Paper system | Kraft paper grade, density, adhesive or impregnation requirements |
| Dimensions | ID, OD, wall thickness, length, roundness and tolerances |
| Electrical duty | Voltage, dielectric test method, creepage distance and assembly location |
| Environment | Operating temperature, humidity, oil exposure and storage conditions |
| Finishing | Cut edges, slots, holes, printing, coating and cleanliness requirements |
Typical applications
- Fuse-link internal insulation and support sleeves
- Transformer and coil winding supports
- Motor, solenoid and electrical assembly insulation
- Custom lightweight paper tubes made to drawing
RFQ checklist
Send the drawing or sample, paper specification, ID, OD, length, tolerances, adhesive or impregnation requirement, voltage and temperature conditions, quantity, packaging and inspection criteria. For moisture-sensitive applications, include storage and maximum moisture-content requirements.
For rigid glass-reinforced insulation, compare our G5/G9 glass melamine tube and filament wound tube.
Brochure and video
Download the insulating kraft paper sleeves brochure. Treat brochure values as reference data and confirm current specifications with the approved drawing.
Explore the full insulation range
This construction is part of our electrical insulation tube range. Related constructions: G7 silicone glass laminate tube, vulcanized fiber motor shaft bushing. For fuse-body components, see the fuse tubes selection guide.
Frequently asked questions
What are insulating kraft paper sleeves used for?
They are paper-based insulating sleeves for motor, rocket and electrical applications where a light, formable insulating layer is needed.
Can kraft paper sleeves be supplied to custom sizes?
Yes. Inside diameter, wall and length can be produced to drawing, and the sleeves can be combined with other insulating materials where required.
Kraft paper sleeves: winding and moisture control decide the fit
Convolute-wound paper sleeves are a light, formable insulating layer, and their behaviour is set by paper grade, moisture content and winding tension. Let moisture drift and the sleeve grows or delaminates after assembly. We wind these sleeves on our own equipment, so paper conditioning and wall build-up stay under the same control as the dimensions we quote.
- Factory-direct pricing on convolute-wound kraft paper sleeves
- Small and prototype runs accepted for design trials
- Inside diameter, wall and length wound to the drawing
- ISO 9001 quality system covering paper conditioning and winding
- SGS material testing available on the paper
- RoHS and REACH documents on request
Insulating kraft paper sleeves: buyer questions
Can kraft paper sleeves be ordered in small quantities?
Yes. Prototype and trial volumes are accepted, which is useful when the sleeve is being combined with other insulating materials for the first time.
What quality system covers the paper sleeves?
They are wound under an ISO 9001 quality system with SGS material testing available, and RoHS and REACH documents can be issued on request.
How quickly do you respond to a kraft paper enquiry?
A technical reply is sent within one working day, and the quotation follows once paper grade, wall build-up and quantity are confirmed.
Request a quote
Send the drawing with inside diameter, wall, length and the paper grade if one is specified, plus the motor or electrical application. We confirm winding feasibility and moisture control before production.