What is the difference between grades 3721, 3723, and 3725?

3721 has the best mechanical strength, 3723 is an economical option, and 3725 is similar to NEMA grade LE.

What is the lead time for orders?

The average lead time is within 15 workdays for both peak and off-season periods.

What payment terms are accepted?

We accept LC, PayPal, Western Union, and Money Gram as terms of payment.

Electrical Insulation Phenolic Cotton Cloth Laminated Rod Bar

Name: Electrical Insulation Phenolic Cotton Cloth Laminated Rod Bar
Brand: Xuchang Rainyan Insulation Material Co., Ltd.
SKU: 2101212382

Henan, ChinaXuchang Rainyan Insulation Material Co., Ltd.

US$1.80-2.50

500 kg

Product profile

Customization

Available

Application

Electrical Maintenance, High Voltage Testing, Home Appliance Repair, Power Construction

Color

Brown

Model NO.

ROD

Diameter

15-200mm

Material

Resin

Maximum Voltage

20KV~100KV

Thermal Rating

H 180

Type

Insulation Sheet

Chemistry

Organic Insulation

Classification

Organic Insulating Material

Certification

ISO9001

Brand

Rainyan

Transport Package

Pallet

Specification

0.5mm-200mm

Trademark

rainyan

Origin

China

Production Capacity

100000kg/Day

Key features

High Voltage Insulation: Supports 20KV-100KV with excellent dielectric performance for electrical equipment.

Superior Mechanical Strength: 3721 grade offers higher mechanical strength compared to 3723 and 3725 variants.

Heat Resistant Material: Made of cotton dipped in phenolic resin with H 180 thermal rating for durability.

Wide Size Range: Available in diameters from 15mm to 200mm with precise tolerance standards.

ISO9001 Certified: Manufactured under ISO9001 certification ensuring consistent quality and reliability.

Versatile Applications: Ideal for transformer parts, electrical maintenance, and high voltage testing.

Smooth Surface Finish: Processed to be smooth, free from air bubbles, oil stains, and impurities.

Low Water Absorption: Water absorption rate is limited to 1.0%, ensuring stability in various environments.

Company profile

Xuchang Rainyan Insulation Material Co., Ltd.

Henan, China

Business Type: Manufacturer/FactoryExport Year: 2001-02-01Nearest Port: qingdao, shanghai, tianjinAverage Response Time: ≤18hTerms of Payment: LC, PayPal, Western Union, etc.International Commercial Terms(Incoterms): FOB, EXW, CFR, CIF, DAT, FAS, DDP, DAP, CIP, FCA

AI-Powered supplier vetting

SummaryXuchang Rainyan Insulation Material Co., Ltd. is identified as a Chinese manufacturer/factory producing electrical insulation materials and related products. It reports ISO 9001 and QC 080000 certifications, broad export coverage, and customization based on customer samples. However, the evidence indicates limited R&D and service infrastructure: no ODM, 3D design, SDK, recent product development, written complaint-handling or corrective-action procedures, warehouse control process, or quality assurance system. Quality-control resources are reported inconsistently, with one inspection staff member and no test equipment in one slice, while another reports 11–20 quality-control staff. Financial records are referenced for 2021–2023, but no financial figures or substantive performance evidence are provided. No customer names, case studies, or verified brand-OEM experience are disclosed.

Supplier typeThe supplier is explicitly identified as a manufacturer/factory and limited company based in Henan, China. Its stated product scope covers polyester film, polyimide tape, pressboard, insulation paper, laminated sheet, and other insulation-related products, while the company description links its products to transformers and electrical motors.

CertificationsThe supplier reports holding ISO 9001 and QC 080000 certifications. The slices identify the certifications but do not provide certificate numbers, validity dates, scope, or independent verification.

After-Sales capabilityThe supplier states that it offers warm-hearted service, but it explicitly reports no written procedures or records for customer complaints and no written corrective and preventive action procedures or records. This demonstrates a documented service-process deficiency.

R&D capabilityThe supplier reports no professional technical R&D capability, no 3D software design, no ODM service, no SDK, and no new products in the past year. Although sample provision is described as an R&D engineer responsibility, the overall evidence shows explicit limitations in innovation and formal R&D capability.

Production capacityThe supplier reports annual production information of 3,240 laminated sheets and 50,000 tons, exports to multiple global regions, and has operated as an exporter for five years. However, quality-control infrastructure appears weak or inconsistent: one slice reports one inspection staff member and zero testing equipment, while another reports 11–20 quality-control staff; finished products are checked by packing staff.

Customization capabilityThe supplier explicitly offers customization from samples and states that its R&D engineer provides samples according to customer requirements. No evidence is provided for broader engineering design, 3D design, ODM, or SDK-based customization, so the demonstrated capability is limited to sample-based customization.