Phenolic Paper Laminated Sheet/Bakelite Sheet for Transformer
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Product Highlights
- Customizable Thickness: Thickness ranges from 0.5mm to 50mm or can be customized to specific requirements.
- High Dielectric Strength: Vertical layer electrical strength up to 6.30 kV/mm in transformer oil.
- Excellent Heat Resistance: Thermal rating of E 120 with high mechanical and oil resistance properties.
- Wide Voltage Application: Suitable for applications with maximum voltage ranging from 10kv to 20kv.
- ISO Certified Quality: Products meet ISO9001, national, and IEC standards with strict quality control.
- Low Water Absorption: Water absorption is strictly controlled, with values as low as 151 mg for 2mm thickness.
- High Impact Strength: Parallel layer impact strength ranges from 6.6 to 8.8 kJ/m2 for durability.
- Versatile Insulation Material: Ideal for insulators, transformers, motors, and high/low voltage electrical appliances.
Product Attributes
- Customization
- Available
- Application
- Insulators
- Color
- Brown
- Model NO.
- KLY-FQZB
- Material
- Fiberglass
- Maximum Voltage
- 10kv~20kv
- Thermal Rating
- E 120
- Thickness
- 0.5mm-50mm or Customized
- Other Epoxy Sheet
- 3020/3021/3022/3026/3027/3028
- Type
- Insulation Tape
- Chemistry
- Inorganic Insulation
- Classification
- Inorganic Insulation Material
- Certification
- ISO9001
- Brand
- Kangliyuan
- Transport Package
- Carton
- Specification
- 1020*2040mm
- Trademark
- Kangliyuan
- Origin
- Tianjin China
- Production Capacity
- 5000kg Per Month
Product Images of Phenolic Paper Laminated Sheet/Bakelite Sheet for Transformer
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Product Description
The phenolic cotton cloth laminated sheet is also called phenolic epoxy laminated sheet or phenolic laminated sheet cover, which is a laminated material made by hot pressing of cotton cloths impregnated with a thermosetting phenol-formaldehyde-based binder. The heat resistance rating is E. It has high mechanical properties, oil resistance, and certain dielectric properties.
| Name | Unit | Value | |||
| 3025 | 3026 | 3027 | 3028 | ||
| Vertical layer bending strength | MPa | ≥100 | ≥110 | ≥90 | ≥100 |
| Parallel layer impact strength | kJ/m2 | ≥8.8 | ≥7.0 | ≥7.8 | ≥6.6 |
| Vertical layer electrical strength(In 90 ºC transformer oil, 1mm) | kV/mm | ≥0.82 | ≥0.82 | ≥5.10 | ≥6.30 |
| Parallel layer breakdown voltage(In 90 ºC transformer oil) | kV | ≥1 | ≥1 | ≥18 | ≥20 |
| Insulation resistance after immersion in water | Ω | ≥1*10^6 | ≥1*10^6 | ≥5*10^7 | ≥5*10^7 |
| dielectric constant (48Hz-62Hz) | ---- | ---- | ---- | ≤5.5 | ≤5.5 |
| Water absorption (2mm) | mg | ≤229 | ≤229 | ≤151 | ≤151 |
Product quality: With consistent quality control throughout the entire process of product design and development, material procurement, production, quality inspection, and sales, the company has passed strict quality system certification and has been widely recognized by well-known customers. The company's products have advantages in quality.

Our products all meet the national standard, IEC standard and ISO standard. We have more than 60 national inventions and utility model patents, and the reliable quality of our products and our superb service has received warm praise from our customers!
We take customer satisfaction as our goal, trying our best to be more professional. In line with the principle of "putting customers first and pursuing continuous improvement" ,we will keep innovating and never stop on our way to become a new material supplier of transformer industry at home and abroad.
Our company has won plenty of awards like "Tianjin Quality Trustworthy Team","Tianjin Excellent Quality Management Group","Advanced Enterprise of Tianjin Promoting General Quality Management Team Activities","National Science And Technology Small And Medium-sized Enterprise","2016 National Excellent Quality Management Unit","2017 National Excellent QC Group","National Hi-tech Enterprise" and we are determined to become better.
Customer visit

Q: How you make sure the quality?
a. We will consult on your requirements, and recommend suitable products to you.
b. Before production, we will send samples to you
c. During production, we will always check quality, package, delivery etc.
d. Before package, with QA to check everything
e. After shipment, we will consult with you about satisfaction.
Q: How to make sure the delivery date?
a. Before production, we will see we can meet your time or not.
b. After your payment, we start our preparing material immediately.
c. During production, We will inform you of the production scheduled.
d. Before shipment, we will inform you to pay the balance on time and booking immediately.

About the Supplier
This supplier has been audited by BV. Verify the report on the official BV website with ID "MIC-ASR246721". Items marked "" are certified.
Company Profile
Kang Liyuan Science & Technology (Tianjin) Co., Ltd, listed in Tianjin stock market in 2017(stock code: 212039), is a high-tech insulation material enterprise in China. Its predecessor Tianjin Kang LiyuanElectrical Materials Manufacturing Co., Ltd. Was one of the insulation materialprocessing enterprises in North China.
We produce insulation materials for oil-immersed transformers, dry type transformers with professional production machines and manufacturing technique. Our main products are insulation materials and insulation components for oil-immersed transformers from 10KV-220KV.
Our products are widely used in oil immersed transformers, dry type transformers, motors, explosion-proof appliances, as well as complete sets of equipment, high & low voltage electrical appliances and otherelectrical control fields.
The company is a professional manufacturer and an excellent supplierof the amorphous alloy transformer insulation accessories. The frameworks produced have been widely used in SH15 series amorphous alloy transformers. We have a number of production lines for Diamond-dotted papers, Pre-impregnated papers, Crepe papers and Crepe paper tubes. The pre-impregnated papers and struts we produced are used in the domestic transformer industry to the anti-short circuit and high overload distribution transformers. We have become the production base of Japanese MIKI crepe paper tubes in the north and northeast area of China.
Our products all meet the national standard, IEC standard and ISO standard. We have more than 20 national inventions and utility model patents, and the reliable quality of our products and our superb service has received warm praise from our customers!
Our company has won plenty of awards like "Tianjin Quality Trustworthy Team", "Tianjin Excellent Quality Management Group", "Advanced Enterprise of Tianjin Promoting General Quality Management Team Activities", "National Science And Technology Small And Medium-sized Enterprise", "2016 National Excellent Quality Management Unit", "2017 National Excellent QC Group", "National Hi-tech Enterprise"and we are determined to become better.
We take customer satisfaction as our goal, trying our best to be more professional. In line with the principle of "putting customers first and pursuing continuous improvement", we will keep innovating and never stop on our way to become a new material supplier of transformer industry at home and abroad.
About Our Factory & Business Background
-
Business Type
- Manufacturer/Factory & Trading Company
- Address
- Beichen District, Tianjin, China
-
Plant Area
- 2300 square meters
-
Number of Employees
- 30
-
Registered Capital
- 30,000,000 RMB
-
Terms of Payment
- LC, T/T, PayPal, D/P, Western Union, Small-amount payment
-
International Commercial Terms(Incoterms)
- FOB, CIF, CFR, EXW
-
Average Lead Time
-
Peak Season Lead Time: within 15 workdays
Off Season Lead Time: within 15 workdays -
Nearest Port
- Tianjin port
-
Minimum Order Quantity
- 1 pcs
-
Supply Chain Partners
- 20
Our Production Capability & Technical Expertise
-
Main Products
- Electrical Laminated Wood, Electrical Pressboard, End Ring, Round Rods, Crepe Paper Tube, Oil Duct Strip, Fibre Glass Tube, Crepepaper Rolling Machine, Phenolic Screw and Nuts, Dimond Dotted Paper
-
Production Lines
- 8
-
Production Machines
- NC cutting machine
-
QA/QC inspectors
- 3 people
-
Inspection Type for Finished Products
- 100% inspection(Visual inspection & Function inspection)
-
Inspection Method for Finished Products
- Have instructions and uniformly followed
-
Customization Options
- Customization from Samples, Customization from Designs, Full Customization, Minor Customization, Flexible customization
-
ODM Service Available
- Yes
-
OEM Service Available
- Yes
-
R&D Engineers
- 2 people
-
Traceability of Raw Materials
- Yes
-
Test Reports for Raw Materials
- Others
Our Industry Experience & Global Business Record
-
Year of Establishment
- 2013-01-21
-
Export Year
- 6 years
-
Main Markets
- Southeast Asia/ Mideast
-
Repeat Buyers Choice
- 50%~80%
-
Number of Foreign Trading Staff
- 2
-
Overseas Agent/Branch
- No
-
New Products Launched in Last year
- Yes
Our Certifications, Standards & Industry Recognition
-
Management System Certification
- ISO9001:2015, ISO45001:2018, ISO14001
-
Cooperated with Fortune 500
- Yes
FAQ
- How do you ensure product quality?
- We consult on your requirements, send samples before production, check quality during production, perform QA checks before packaging, and follow up on satisfaction after shipment.
- How is the delivery date guaranteed?
- We confirm time feasibility before production, prepare materials immediately after payment, inform you of the schedule during production, and notify you to pay the balance before shipment.
- What is the minimum order quantity?
- The minimum order quantity is 1 piece.
- What payment terms are accepted?
- We accept LC, T/T, PayPal, D/P, Western Union, and small-amount payments.
- What is the average lead time?
- The average lead time is within 15 workdays for both peak and off-season periods.
- Is customization available for this product?
- Yes, thickness can be customized from 0.5mm to 50mm, and other customization options like samples, designs, and flexible customization are available.
- What certifications does the product have?
- The product has ISO9001 certification and meets national, IEC, and ISO standards.
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