Diamond Dotted Insulation Paper Manufacturer

Diamond Dotted Insulation Paper For Distribution Transformer

Diamond Dotted Insulation Paper For Distribution Transformer

DDP is produced by coating modified epoxy-resin in diamond-dotted patterns on electrical insulating paper.

color：

natural color/customized

Free sample：

Thermal Class：

A 105℃

Available width：

1000mm/customized

Thickness：

0.076-0.50mm

Quantity

Description
Application
Related Product

Diamond Dotted Paper For Distribution Transformer

In accordance with GB/T5591.3.1-2008

Description:

Diamond Dotted Insulation Paper is also called DDP. It is produced by coating modified epoxy-resin in diamond-dotted patterns on electrical insulating paper, the epoxy adhesive is applied to both sides of the paper in a diamond pattern consisting of 9.5mm x 9.5mm diamonds with 15.9mm center spacing. This Design improves the mechanical strength of oil-immersed transformer winding without reducing partial discharge levels. Due to the use of epoxy-resin, this diamond dotted insulation paper is also commonly referred to as epoxy diamond dotted paper.

Advantage:

In the process of coil desiccation, the coated epoxy-resin would be melted in a certain temperature and become adhesive. With the temperature increased, the melted resin would cure to C-stage, and firmly adhere each adjoining layer of the coil, thus forming a winding section. If a short circuit occurs in the coil, the resin bond strength would sufficiently prevent the displacement of each winding layer, which ensures the long-term mechanical and physical properties of the insulation structure. As the resin coating distributes in a diamond-dotted pattern, little quantity of the resin would soak into the insulating paper during the melting and curing process, which ensures the elimination of air content in the insulating paper and guarantees the soakage of oil, minimizing the damages of corona and partial discharge.

Applications:

Diamond dotted paper is suitable for turn-to-turn insulation of coil wires on oil-immersed power transformers and suitable for layer insulation of coils on distribution transformers.

Who is Hechin?
We are a factory, supplier, and manufacturer integrating R&D, production, and sales. Since 2005, we specialize in all kinds of insulating materials for liquid and cast resin transformers and motors. Thanks to the complete range of insulation products and custom system, you can enjoy convenient, high-quality one-stop bulk purchasing at Hechin.

We introduce raw materials from well-known brands to ensure high quality, high stability, and high safety. After 17 years of development, we have established cooperative relationships with many world brands, such as WEG, CG, ABB, HYOSUNG, HYUNDAI, and LSIS. Our goal is to achieve a global footprint. Expect to work with you!

Nominal Thickness	Tolerance	Nominal Grammage	Tensile Strength		Breakdown Voltage room Temp	Density	Moisture Content	Single side coating	Bond Strength
Nominal Thickness	Tolerance	Nominal Grammage	MD	TD	Breakdown Voltage room Temp	Density	Moisture Content	Single side coating	Bond Strength
mm	mm	（g/m²）	（MPa）		（kv/mm）	（g/cm3）	（%）	（µm）	（kpa）
0.05	±0.01	50±15	≥80	≥40	≥10	0.85-1.1	4-8	6-12	≥650
0.08	±0.01	80±20
0.13	±0.01	130±25
0.15	±0.02	150±30
0.18	±0.02	180±35
0.2	±0.02	200±40
0.25	±0.03	250±45
0.3	±0.03	300±50
0.35	±0.04	350±55
0.38	±0.04	380±60
0.4	±0.04	400±60
0.45	±0.05	450±65
0.5	±0.05	500±70
0.7	±0.07	700±80

﹥﹥1 DDP Technical Data
﹥﹥2 Curing conduction stock
2.1 Curing: 90℃±2 ℃／3h firstly , then130℃±5℃/6h, or according customer needs
2.2 Storage: ≤40℃, dry, clean in warehouse. Avoid fire, heat and sunlight.
2.3 Storage life: 12 months. Still effective if qualified in retest after 12 months.

Epoxy Diamond Dotted Paper Features:

1. 100% long fiber wood pulp
2. High purity and good Electrical strength
3. Epoxy resin one or both sides
4. Guaranteed no broken
5. Great tension
6. Insulation class A according to IEC
Diamond Dotted Paper Application

DDP packing:

Why choose us:

Factory Direct Sales

High quality epoxy resin

Good bonding strength

FAQ:

Q1:What is the payment term?
A: 100% T/T or 30% in advance, balance before loading.

Q2:What is the shipping port?
A:Shanghai Port, Ningbo Port

Q3:What is the delivery time?
A: 10 ~ 25 working days depend on orders

Q4:What is the quality level of your product?
A: International Standard - IEC

Q5. Are you factory or a trading company ?
A: Factory, We have more than 17 years experience in producing insulation materials

Q6: when did you found ?
A: In 2005

Q7: How many employee in your company ?
A: Around 50~100

Q8: Where is your factory located? How can I visit there?
A: Our factory is located in YongKang, Zhejiang provience.

Q9: Which Diamond dotted paper DDP certification do you have?
The plant has passed the certificate of ISO 9001 quality system certification;
The insulation system has been got SDS Report

Q10: Can I get samples for free?
A: yes sure, free samples, customer pay shipping.

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