What power frequency withstand voltage test standard does the tape pass?

It passes 1kV/1min 50Hz withstand voltage test without breakdown or flashover under dry condition.

What does thermal class Y (90 Celsius) mean? Why thermal grade rises after varnish dipping?

The tape can continuously work under 90 Celsius when used alone. After full varnish impregnation, cotton fabric combines with varnish film to reach A E B thermal class.

Can this pure cotton binding tape be used as primary insulation alone?

No. Dry cotton tape only has low dielectric strength, it is only used for mechanical binding. Complete insulation can only be formed after varnish dipping.

What mechanical performance standards does the product meet?

Tensile strength more than 180N per 10mm for plain weave, more than 200N per 10mm for twill weave; heat shrinkage less than 5 percent, glue content less than 5 percent.

Short Small Roll Plain Weave Cotton Electrical Tape, Small Package Cotton Insulation Binding Tape for Small Batch Electrical Maintenance

Name: Short Small Roll Plain Weave Cotton Electrical Tape, Small Package Cotton Insulation Binding Tape for Small Batch Electrical Maintenance
Brand: Xuchang Zhonghao Insulation Materials Co., Ltd.
SKU: 2181082532

Henan, ChinaXuchang Zhonghao Insulation Materials Co., Ltd.

US$0.40-0.43

250 Rolls

Sample price:US$30.00/piece.Request sample

Product profile

Customization

Available

Application

Electrical Insulation

Color

White

Model NO.

901

Material

100% Pure Cotton Fabric

Maximum Voltage

Dry Dielectric Strength 3 to 6 Kv Per mm

Thermal Rating

Y Class 90 Celsius

Width

15mm,20mm,25mm,30mm,40mm,50mm

Weave Type

Plain Weave/ Twill Weave

Thickness

0.18mm / 0.25mm / 0.30mm / 0.35mm

Roll Length

25m, 50m, 100m

Cotton Yarn

32s/2 Pure Cotton Yarn

Feature

Neutral Fabric, High Tensile Strengt

Mechanical Index

Longitudinal Tensile ≥180/200n/10mm

Product Name

Pure Cotton Electrical Insulation Binding Tape

Certification

ISO9001

Transport Package

Carton and Wooden

Specification

25/50/100m per roll

Trademark

Zhonghao

Origin

Xuchang, Henan, China

HS Code

5903909000

Key features

Base termal class Y90 degrees Celsius, upgraded to A/E/B class after varnish dipping, fit various temperature working conditions of transformers and motors.

Good oil resistance to transformer insulating oil, no swelling or aging under long-term oil immersion.

Neutral fabric without free acid & alkali, no corrosion to copper wires, stable long-term use for oil immersed transformers.

Plain & twill weave available; twill type tensile strength up to 200N/10mm, firm binding without breakage.

Complete specifications: 0.18~0.35mm thickness, 15~50mm width, 25/50/100m per roll, custom sizes supported.

Glue content controlled under 5%, excellent varnish permeability, greatly improved dielectric strength after impregnation.

Strict factory inspection: limited joint per roll, free of holes, oil stains and impurities, stable appearance quality.

Designed for mechanical coil binding only; much safer insulation performance when matched with insulating varnish.

Company profile

Importers and ExportersSelf-brandedFast DeliveryODM Services

Xuchang Zhonghao Insulation Materials Co., Ltd.

Henan, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: Confidential CertifiedNearest Port: Guangzhou port, Qingdao portAverage Response Time: ≤6.26h

About Our Factory & Business Background

AddressNo. 2988, South Ring Road, Economic & Technological Development Zone, Xuchang, Henan, China

Plant Area3000 square meters

Number of Employees15

Registered Capital3,000,000 RMB

Terms of PaymentLC, D/P, T/T, PayPal, Western Union, Small-amount payment

International Commercial Terms(Incoterms)FOB, CIF, CFR, EXW

Average Lead TimePeak Season Lead Time: within 15 workdays Off Season Lead Time: within 15 workdays

Minimum Order Quantity100 kg

Supply Chain Partners6

Our Production Capability & Technical Expertise

Main ProductsInsulating, Insulating Paper, Insulating Tube, Fiberglass Tape, Electrical Insulating Board, Glass Fiber Unidirectional Tape

Production Machinesbar cutting machine, cutting machine

QA/QC inspectors2 people

Inspection Type for Finished ProductsRandom inspection(Visual inspection & Function inspection)

Inspection Method for Finished ProductsHave instructions and uniformly followed

R&D Engineers2 people

Traceability of Raw MaterialsYes

Test Reports for Raw MaterialsOthers

Our Industry Experience & Global Business Record

Year of Establishment2011-09-22

Main MarketsDomestic

Repeat Buyers Choice< 10%

Number of Foreign Trading Staff3

Overseas Agent/BranchNo

New Products Launched in Last yearNo

Our Certifications, Standards & Industry Recognition

Management System CertificationISO9001:2015, ISO45001:2018, ISO14001

Cooperated with Fortune 500No

Product Q&A

Q:What standard sizes do you provide? Can we customize special dimensions?

Standard thickness 0.18/0.25/0.30/0.35mm, width 15~50mm, roll length 25/50/100m. Custom sizes are supported.

Q:Do you have a factory?

Yes, we have a factory in Henan. We welcome you to visit our company and facility. As a professional manufacturer, we provide OEM/ODM services to our clients.

Q:How to choose between plain weave and twill weave cotton tape?

Choose twill weave for large oil immersed transformers requiring high tensile force. Plain weave fits small motors with better cost performance.

Q:Will the tape deteriorate after long immersion in transformer oil?

It will not deteriorate. The fabric will not chemically react with insulating oil and keeps stable service performance.

Q:Does the cotton tape cause oxidation or corrosion on copper wires?

The fabric is fully neutralized without free acid or alkali, so no corrosion or oxidation will happen to copper windings.