For manufacturers of electrical insulation sheets—used in motors, transformers, switchgear, and other high-voltage apparatus—the adhesive you select isn’t just about glue. It’s integral to safety, performance, and compliance. This guide helps you pick the right adhesive for your insulation sheets by defining key criteria, comparing adhesive types, and aligning product choices with your application requirements.
What Are Electrical Insulation Sheets and Why Adhesive Matters
Electrical insulation sheets are layered composites — paper, mica, polyester, glass cloth, etc. — bound together with adhesives. They provide electrical separations, thermal resistance, structural integrity, and insulation under stress (heat, moisture, electric field).
If the adhesive fails (delamination, creeping, dielectric breakdown), the whole sheet fails—leading to device failure, safety hazards, or regulatory reject. So you need an adhesive that matches or exceeds the demands: dielectric strength, thermal class, moisture resistance, mechanical stability.
Common Adhesive Mistakes Made by Sheet Manufacturers
- Choosing adhesives with inadequate dielectric strength → risk of breakdown under high voltage.
- Using adhesives not rated for required thermal class → adhesives degrade, lose bond at elevated temperature.
- Ignoring moisture/humidity effects → delamination or performance drop.
- Overlooking substrate compatibility (mica, glass, polyester, etc.) → poor adhesion or mechanical failure.
- Prioritizing cost over long-term performance or regulatory compliance.
Consequences of Adhesive Failures in Electrical Insulation
- Safety risks including short circuits, tracking, or even fire.
- Equipment failure leading to warranty claims or loss of customers.
- Increased rejection by certifying bodies (UL, IEC, etc.) or mismatched ratings.
- Higher maintenance and lifecycle costs.
- Reduced market access, especially for export to regions with strict insulation and safety norms.
Types of Adhesives Used in Electrical Insulation Sheets
1. Solvent-Based Acrylic Adhesives:
Known for high thermal resistance, excellent bond strength, and Class F/H insulation capabilities. Ideal for mica papers, glass fabrics, and high-end insulation sheets.
2. Water-Based Acrylic Adhesives:
Eco-friendly, low-VOC options suitable for moderate insulation sheets with Class B/E thermal needs. Useful where regulatory or sustainability goals apply.
3. Pressure-Sensitive Adhesives (PSA):
Offer easy lamination without heat. Best for fast production lines, pre-cured sheets, and self-adhesive insulation applications.
Key Selection Parameters for Electrical Insulation Adhesives
| Parameter | Importance |
|---|---|
| Dielectric Strength | Withstand high voltage without breakdown |
| Thermal Class Compatibility | Must match end-use (B, F, H, etc.) |
| Moisture Resistance | Prevents delamination in humid/high-moisture environments |
| Bonding Substrates | Mica, PET, polyester film, aramid paper, etc. |
| Mechanical Flexibility | Withstands bending and thermal cycling |
| Regulatory Approvals | UL, RoHS, REACH compliance |
H7. Solvent vs Water-Based Adhesive Comparison for Electrical Use
| Feature | Solvent-Based | Water-Based |
|---|---|---|
| Thermal Resistance | Up to 180°C (Class H) | Up to 120°C (Class B/E) |
| Dielectric Strength | Excellent | Moderate to good |
| Drying Speed | Fast | Slower |
| VOC Emissions | Higher (industrial-grade setups needed) | Low (eco-compliant) |
| Substrate Compatibility | Mica, glass cloth, PET, Nomex, aramid | Paper, film, non-critical layers |
Matching Adhesive to Insulation Sheet Applications
- Mica-Based Sheets (Class F/H): Use Shreecryl SS 595, a pressure-sensitive solvent-based adhesive with proven track record.
- PET Film & Aramid Paper Sheets (Class B/E): Use water-based lamination adhesives with adequate bonding strength.
- Transformer & Motor Coil Wraps: Use high-strength, solvent-based adhesives that resist high temperature + humidity.
Why Shreecryl Adhesives Are Built for Insulation Sheet Performance
Shree Vinayak Organics’ Shreecryl Series delivers lab-tested, industry-validated adhesives tailored for insulation:
- SS 595: Pressure-sensitive solvent-based adhesive for mica & thermal insulation papers
- ST Series: Water-based acrylic for eco-sensitive applications
- Customized formulations for client-specific performance requirements in voltage, temperature, substrate, and flexibility
Top Performing Products for Sheet Lamination
✅ Shreecryl SS 595 – Solvent-Based PSA Adhesive
✅ Solvent-Based Acrylic Adhesive Suppliers
✅ Lamination Adhesives for Electrical Insulation
✅ Pressure Sensitive Adhesive Suppliers
✅ Water-Based Acrylic Adhesives
Global Demand & Export Support for Insulation Adhesive Solutions
Electrical insulation laminates are used across:
- Transformer and motor manufacturing in Gulf, Africa, EU, and Southeast Asia
- EV and hybrid vehicles in Germany, South Korea, USA
- Home appliances in UAE, Bangladesh, Vietnam
🔹 Shree Vinayak Organics supports custom adhesive formulations, export-compliant MSDS + CoA, and drum/tanker/IBC packaging for international buyers.
How to Choose the Right Adhesive for Your Electrical Laminate
Here’s a simple 3-step buyer guide:
- Define end-use thermal class: Class B (130°C), F (155°C), or H (180°C)?
- Match adhesive chemistry: Water-based for Class B, Solvent-based for Class F/H
- Confirm regulatory + substrate compatibility: Dielectric strength, flexibility, and flame resistance
📌 For technical matching, contact our experts →
Product Testing, Approvals & Custom Formulations
All Shreecryl adhesives undergo:
- Dielectric breakdown testing (ASTM D149)
- Peel & shear strength tests
- Heat aging simulations
- Humidity + moisture exposure tests
Custom formulations are available for mica, Nomex, aramid, PET, and glass fabrics.
Request Technical Datasheet
📩 Need a detailed TDS, SDS, price quote, or custom adhesive support?
👉 Fill out your requirement at svoipl.com/contactus
🧪 We also offer sample trials and lab testing for insulation sheet manufacturers.
Voice Search Optimized Buyer FAQs
Q1. What adhesive is best for electrical insulation laminates?
For high-heat resistance, solvent-based adhesives like Shreecryl SS 595 are best.
Q2. Can we use water-based adhesives for insulation sheets?
Yes, for Class B/E applications, especially where eco-compliance is preferred.
Q3. Which adhesive brand is trusted for mica sheet lamination?
Shree Vinayak Organics with its Shreecryl SS 595 is a popular choice.
Q4. Does Shree Vinayak export to GCC or Africa?
Yes, with full documentation, packaging, and bulk dispatch options.
Q5. Can I get custom adhesive formulation for aramid or Nomex papers?
Absolutely. Custom R&D support is available with MOQ and performance specs.
Q6. How do I test adhesive dielectric performance?
Use ASTM D149 dielectric strength test or request our CoA reports.
Q7. What packaging options are available?
From 25kg cans to 200kg drums, IBC tanks, and export cartons.
Q8. What if my production line is high-speed?
Use pressure-sensitive solvent adhesives with fast-dry and low-tack profiles.
Q9. Does adhesive affect insulation sheet thickness?
Minimal—our adhesives are engineered to maintain dimensional uniformity.
Q10. Can I buy directly from Shree Vinayak Organics?
Yes, visit svoipl.com/contactus and our sales team will assist you.