Diamond Dotted Paper Manufacturer, Supplier & Exporter in India
Diamond Dotted Paper is a specially formulated electrical insulation material that is used when both electrical insulation and bonding by heat is required. It is prepared by applying a thermosetting epoxy adhesive in the form of dots in a diamond shape onto electrical insulation grade paper. On exposure to the specified temperature at the time of manufacturing, the adhesive gets softened and helps bond adjacent layers of insulation.
The company Harnawa Insulations provides diamond dotted paper for transformer insulation, motor insulation, coil insulation and other applications related to electrical insulation. The product is available in rolls as well as sheets, and the thickness can be tailored as per the requirement.
Being one of the experienced diamond dotted paper manufacturers and suppliers in India, Harnawa specializes in providing insulation material that is suitable for demanding electrical applications. In addition to diamond dotted paper, Harnawa also supplies various grades of insulation pressboard for electrical insulation requirements.
What Is Diamond Dotted Paper?
Diamond Dotted Paper, popularly referred to as DDP, is a type of electrical insulation paper that contains an epoxy adhesive applied in the form of diamonds on the surface of the paper. As opposed to traditional insulation paper, the application of the epoxy adhesive in DDP creates an extra bonding function.
During the process of manufacture of a transformer, motor, or coil, DDP may be placed either between or among the layers of the insulation. Upon exposure to heat, the epoxy dots will activate to create bonds between the adjacent layers.
It is due to its combination of the function of insulation and bonding that diamond dotted paper is applicable in cases where the insulating structure requires added strength.
The paper functions as an insulator while the epoxy adhesive acts as a bonding agent upon activation by heat.
How Does Diamond Dotted Paper Work?
Diamond dotted paper utilizes the principle of bonding through heat activated adhesion.
First, the insulation paper is positioned in its proper place in the insulation system. Once the heat or curing process begins, the epoxy coating on the paper becomes active and the adhesive dots become softer and attach to the insulation layers around them.
In the end, there would be an insulation structure which is sturdier because of the bonding process.
The process can be simply explained as:
Insulation paper –> Epoxy coating in diamond pattern –> Insulation system positioning –> Heat activation –> Adhesion –> Insulation structure
Key Features of Diamond Dotted Paper
There are many features that Diamond Dotted Paper can provide as an insulating material:
- Epoxy bonding through heat activation
- Electrical insulation properties
- Strong bonding after curing
- Mechanical stability
- Thermal stability
- Compatibility with transformer oil
- Easy handling and processability
- Supplied in rolls and sheets
- Customized thickness
- Can be used as insulation in transformers and motors
- Provides insulation layers positioning
- Suitable for industrial electrical applications
The current specification of Harnawa includes thickness from 0.05 mm to 0.5 mm, supplied in rolls and sheets with the possibility of customization. Thermal class is Class B/F based on adhesive.
Diamond Dotted Paper for Transformer Insulation
Insulating materials for transformers have to be capable of withstanding various stresses associated with electrical, thermal, and mechanical aspects of transformer usage.
Diamond dotted paper may be used as an insulator in the insulating system to perform dual roles as a dielectric separator and adhesive binder of the insulator components.
Its heat-activated adhesive binds the components of the insulation system after the curing process.
It is a choice of the insulating materials by the transformer manufacturer based on parameters like operating temperature, dielectric needs, thickness, oil compatibility, mechanical needs, and construction method.
The company Harnawa also offers other transformer and electrical insulating materials.
Diamond Dotted Paper for Motor and Coil Insulation
Motors and coils require flexible insulating materials which have the ability to retain their positions when they are wound, assembled and operated.
Diamond dotted paper can be used in the winding insulation and wherever there is need for bonding of the insulation layers.
Heat activated adhesive acts as a bonding agent after its cure, whereas the electrical insulation paper acts as dielectric insulation.
For applications requiring other insulation constructions, Harnawa has other alternatives like DMD insulation paper and other laminated insulation papers.
Applications of Diamond Dotted Paper
Diamond Dotted Paper is commonly used in electrical insulation systems for:
Transformer Winding Insulation
DDP can be used as an insulation material in the construction of transformers, where heat-activated bonding is useful.
Motor Winding Insulation
DDP can be used as an insulation material in motor windings.
Coil Insulation
The material can be used as an insulator for coils where both insulation and bonding are needed.
Electrical Equipment
DDP can be used in the manufacturing of different types of electrical equipment where insulation and bonding material is required.
Transformer and Coil Construction
The product is specifically suited for transformers and coil manufacturers since it provides insulation as well as heat-activated bonding.
According to Harnawa’s website, some of the industries that use the product are transformer and coil manufacturing, motor manufacturing, generator manufacturing, high-temperature applications, EV applications, and capacitor manufacturing.
Diamond Dotted Paper vs Conventional Insulation Paper
While both types of papers serve an insulating purpose, there is a clear distinction between conventional insulation paper and the diamond dotted paper. The conventional paper acts as a simple electrical insulator, while the diamond dotted paper acts as a heat-activated glue through the coating of epoxy.
| Feature | Diamond Dotted Paper | Conventional Insulation Paper |
|---|
| Electrical insulation | Yes | Yes |
| Heat-activated bonding | Yes | Generally no |
| Epoxy adhesive coating | Yes | Generally no |
| Mechanical bonding after curing | Yes | Limited |
| Transformer applications | Yes | Yes |
| Motor applications | Yes | Yes |
| Available in rolls/sheets | Yes | Yes |
The appropriate material should always be selected according to the specific insulation design and operating conditions.
Diamond Dotted Paper Manufacturers in India
The selection of right diamond dotted paper manufacturers becomes very crucial whenever the diamond dotted paper is employed in transformers, motors, generators, coils, and other types of electrical equipment.
The best manufacturer can provide good quality paper, good uniformity in adhesive coating, proper thickness, good thermal characteristics, and good availability of the material.
Harnawa Insulations is an Indian manufacturer of electrical insulation materials that supplies wide varieties of insulation materials in the categories of insulation papers, press board, aramid papers, laminated insulation composite, polyester film, fiberglass materials, and other electrical insulation components.
It also offers different insulation materials that have better thermal characteristics or laminate constructions. For instance, its AHA insulation paper is made with aramid polyimide aramid construction for Class H application.
Diamond Dotted Paper Supplier in India
Harnawa Insulations provides diamond dotted paper for insulation purposes in the industrial electrical field in India. The diamond dotted paper can be provided in both roll form and sheet form, where its thickness can be customized as per customer requirements.
It will be easier for manufacturers of transformers, motors, coils, and other electrical machinery in India to purchase diamond dotted paper from a supplier who provides the product within India itself.
Customers can communicate with the Harnawa team regarding their requirements regarding thickness, width, roll form or sheet form, adhesive property, application, quantity, and other technical matters before making the order.
In case customers require any other type of insulation paper, Harnawa offers other types of insulation papers under the category of ‘Insulation Pressboard/Papers’.
Diamond Dotted Paper Exporter from India
Apart from catering to the Indian market, Harnawa is also able to cater to international buyers seeking electrical insulation material from India. As an exporter of diamond dotted paper, Harnawa is capable of fulfilling the needs of industrial buyers for insulation material for transformer, motor, coil, and electrical equipment manufacture.
The needs of international buyers for exporting purposes can be conveyed to the Harnawa sales department, regarding the requirements of specification of product, quantity, packing requirements, destination, and delivery.
The wider product variety offered by Harnawa includes aramid papers, high temperature insulation tapes, fiberglass insulation sleeves, polyimide films, insulated laminated papers, polyester films, insulation sheets, and electrical insulation material.
Why Choose Harnawa for Diamond Dotted Paper?
Harnawa Insulations is an electrical insulations material company that caters to the industrial sector. The clients who choose Harnawa for diamond dotted paper will be able to take advantage of the following advantages:
- Knowledge in electrical insulation products
- Manufacturing and supplies from India
- Variety of insulation materials
- Custom thickness
- Roll and sheet supply
- Application-based product choices
- Transformer and motor insulation needs solutions
- International and domestic supplies
The website of Harnawa features certifications and compliance details such as UL, CE, RoHS, ISO 9001:2015 and REACH.
How to Select the Right Diamond Dotted Paper?
Before ordering diamond dotted paper, manufacturers should consider the actual application and operating conditions.
1. Thickness
Choose the right thickness according to the insulation space available and the desired dielectric properties.
2. Thermal Class
The insulating system and adhesive should be suited for the operating temperature conditions expected.
3. Adhesive Performance
The coating of epoxy resin should have the necessary bonding properties after the heating and curing process.
4. Oil Compatibility
In case of oil-filled transformers, the insulating system and transformer oil should be compatible.
5. Supply Format
Based on the manufacturing process, the insulating material may be required in various forms such as rolls, sheets, strips, and customized.
6. Application
Insulation needs of transformers are different from those of motors, generators, coils, and other electrical appliances. Therefore, the insulating material must be chosen according to the total insulation system.
Related Electrical Insulation Materials
Dotted diamond papers are merely one aspect of a full set of electrical insulation material options. According to their requirements, the manufacturers will need laminated papers, aramid papers, polyester films, fiberglass materials, tapes, and insulation materials.
Following is a list of related products by Harnawa:
This internal linking structure can help users move from Diamond Dotted Paper to related insulation products based on their application requirements.
Frequently Asked Questions
1.What is Diamond Dotted Paper?
Diamond Dotted Paper is electrical insulation paper with epoxy adhesive coating in diamond shape that can be activated by heat. It is used where electrical insulation and bonding between the layers of insulation is necessary.
2.For what purposes is Diamond Dotted Paper used?
This type of paper is usually used for transformer winding insulation, motor winding insulation, coil construction and many other purposes related to electrical insulation.
3.Is Diamond Dotted Paper suitable for transformers?
Yes, this paper can be used in insulation application for transformers because it requires bonding and electrical insulation. Among its applications Harnawa mentions transformer insulation and coil construction.
4.Which thicknesses are available?
According to the current product specification of Harnawa, thicknesses of the paper vary from 0.05 mm to 0.5 mm, depending on the requirements.
5.Are Diamond Dotted Paper in rolls available?
Yes, Harnawa’s current product specification states that this product can be supplied in rolls and sheets.
6.Which adhesive is used on Diamond Dotted Paper?
There is an epoxy adhesive coating on Diamond Dotted Paper in a diamond pattern, which is activated by heat and allows bonding between the layers of insulation.
7.Is Diamond Dotted Paper oil compatible?
According to Harnawa’s product specification, this material is very oil compatible for transformers.
