PMP Insulation Paper

Description

Product Structure & Composition

PMP insulation paper is a sophisticated three-ply composite material that combines the best properties of cellulose paper and polymer film:

Outer Layers: High-purity capacitor paper made from 100% sulfate wood pulp presspaper, providing excellent oil absorption and compatibility
Middle Layer: Electrical-grade polyester film (PET) that delivers superior dielectric strength and moisture resistance
Bonding System: High-performance adhesive ensures permanent lamination without delamination under thermal stress

This unique composite structure balances the softness and wettability of paper with the mechanical robustness and dielectric performance of polyester film, making it ideal for applications requiring both flexibility and strength.

Key Performance Characteristics

Our PMP insulation paper offers outstanding technical properties that meet international standards:

Thermal Classification: Class B (130°C) standard, with Class F (155°C) options available for specialized applications
Electrical Performance: Superior dielectric strength with breakdown voltages ranging from 5kV to 12kV depending on thickness
Mechanical Strength: Machine-direction tensile strength from ≥50 N/10mm to ≥140 N/10mm across thickness ranges
Dimensional Stability: Low shrinkage rate (≤3%) ensures reliable performance under thermal cycling
Processability: Excellent formability for automatic insertion systems and manual winding applications

Quality Assurance & Certifications

SIDA’s PMP insulation paper meets stringent international quality and environmental standards:

UL Certification: Approved under UL file No. E310670
Environmental Compliance: Fully compliant with RoHS and REACH directives
Manufacturing Standards: Produced according to GB5591.1 and IEC 60626 specifications
Quality Management: ISO9001 certified manufacturing processes

4. Technical Specifications Data Table

Parameter	Unit	0.05mm	0.07mm	0.10mm	0.15mm	Test Standard
Nominal Thickness	mm	0.05	0.07	0.10	0.15	IEC 60626
Thickness Tolerance	mm	±0.005	±0.007	±0.010	±0.015	GB/T 5591.2
Grammage	g/m²	65	90	140	205	ISO 536
Grammage Tolerance	%	±7	±9	±14	±20	ISO 536
Tensile Strength (MD)	N/10mm	≥50	≥70	≥100	≥140	GB/T 12914
Tensile Strength (TD)	N/10mm	≥40	≥60	≥90	≥120	GB/T 12914
Breakdown Voltage	kV	≥5	≥7	≥10	≥12	GB/T 1408.1
Bonding Strength (Room Temp)	–	No Delamination	No Delamination	No Delamination	No Delamination	IEC 60626
Bonding Strength (130°C/10min)	–	No Delamination, No Bubbles	No Delamination, No Bubbles	No Delamination, No Bubbles	No Delamination, No Bubbles	IEC 60626
Shrinkage	%	≤3	≤3	≤3	≤3	GB/T 5591.2
Thermal Class	–	Class B (130°C)	Class B (130°C)	Class B (130°C)	Class B (130°C)	IEC 60085
Available Widths	mm	10-540 (customizable)	10-540 (customizable)	10-540 (customizable)	10-540 (customizable)	–

Note:The product specifications provided are for reference purposes only. Please refer to the actual product for final specifications. We also offer various sizes and thicknesses to meet your specific needs. For further customization, please contact us.

Custom thicknesses up to 0.60mm available upon request. Class F (155°C) rated materials also available.

5. Application Scenarios

Primary Applications

Voltage Transformers
- Ideal for casting voltage mutual inductors and potential transformers (PT)
- Provides reliable insulation for 20kV to 35kV potential transformers
- Meets IEEE C57.13 and ANSI C12.11 standards for instrument transformers
Electric Motor Insulation
- Slot Liner Insulation: Automatic insertion winding slot insulation for small to medium motors
- Phase Insulation: Inter-phase and turn-to-turn insulation in motor windings
- Coil Wrapping: Slot and random wound coil wrapping for Class B motors
- Suitable for brushless, stepping, and servo motors
Transformer Components
- Gasket insulation in oil-immersed and dry-type transformers
- Layer insulation between windings
- End insulation and lead insulation
General Electrical Equipment
- Wrapping insulation for coils and conductors
- Barrier insulation in switchgear and control panels
- Insulation pads and shaped components

Industry-Specific Use Cases

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Industry	Application	Typical Thickness
Power Distribution	35kV Potential Transformers	0.15mm – 0.20mm
Industrial Motors	Motor Slot Insulation	0.10mm – 0.15mm
Consumer Electronics	Small Motor Insulation	0.05mm – 0.07mm
Energy	Oil-Transformer Gaskets	0.15mm – 0.25mm
Automotive	EV Motor Phase Insulation	0.10mm – 0.15mm

6. Testing Standards & Quality Compliance

Applicable International Standards

IEC 60626: Specification for composite insulation materials
IEEE C57.13: Standard for instrument transformers (for PT applications)
ANSI C12.11: American National Standard for instrument transformers
GB/T 5591.2: Chinese national standard for flexible composite insulation materials
UL 1446: Standard for insulation systems (UL certified)
IEC 60085: Electrical insulation thermal classification

Certification & Compliance Marks

UL Listed: File No. E310670
RoHS Compliant: 2011/65/EU & 2015/863/EU
REACH Compliant: Regulation (EC) No 1907/2006
ISO 9001: Quality management system certified

Test Methods & Performance Verification

All SIDA PMP insulation paper undergoes rigorous quality testing:

Electrical Testing: Dielectric breakdown voltage per GB/T 1408.1
Mechanical Testing: Tensile strength and elongation per GB/T 12914
Thermal Testing: Bonding strength at elevated temperatures (130°C ±2°C for 10 minutes)
Dimensional Testing: Thickness and grammage verification per ISO 536
Environmental Testing: RoHS and REACH substance screening

7. Frequently Asked Questions (FAQs)

Q1: What does “PMP” stand for in insulation paper?

A: PMP stands for Polyester Film and Capacitor Paper Composite. It refers to the three-layer structure consisting of two outer layers of capacitor paper (P) and a middle layer of polyester film (M), forming a composite material widely used in electrical insulation applications.

Q2: What is the difference between Class B and Class F PMP insulation paper?

A: Class B PMP is rated for continuous operation at 130°C, while Class F PMP can withstand temperatures up to 155°C. Class B is standard and more economical, while Class F uses higher-grade adhesives and materials for demanding applications. Both are available from SIDA.

Q3: Can PMP insulation paper be used in oil-filled transformers?

A: Yes, PMP insulation paper is highly suitable for oil-immersed transformers. The capacitor paper outer layers provide excellent oil absorption and compatibility, while the polyester film core maintains dielectric strength in oil environments.

Q4: What is the typical shelf life and storage requirement?

A: Standard shelf life is 12 months when stored properly. Store in a clean, dry environment below 40°C, away from heat sources and direct sunlight. Prevent edge damage, surface scratches, and contamination from oil or dust.

Q5: How does PMP compare to NMN or NHN insulation materials?

A: PMP is more economical than NMN (Nomex-Polyester-Nomex) or NHN (Nomex-Polyimide-Nomex) while providing adequate performance for Class B applications. NMN/NHN offer higher temperature ratings (Class F/H) but at significantly higher cost. PMP is ideal for cost-sensitive applications within its temperature range.

Q6: Can SIDA customize the width and thickness of PMP rolls?

A: Absolutely. We offer customization from 10mm to 540mm width and thicknesses from 0.05mm to 0.60mm. Custom slit widths, sheet formats, and die-cut shapes are available to meet your specific manufacturing requirements.

Q7: Is PMP insulation paper suitable for automatic insertion machines?

A: Yes, PMP’s excellent formability and mechanical strength make it ideal for both automatic slot insertion systems and manual winding processes. The material maintains dimensional stability during high-speed insertion operations.

Q8: What safety certifications does SIDA’s PMP insulation paper carry?

A: Our PMP insulation paper is UL listed (File No. E310670), fully compliant with RoHS and REACH environmental regulations, and manufactured under ISO9001 quality management systems.

8. Storage & Handling Guidelines

Optimal Storage Conditions

Temperature: Below 40°C (104°F)
Humidity: <65% relative humidity
Environment: Clean, dry, well-ventilated area
Light Protection: Avoid direct sunlight and UV exposure
Separation: Keep away from heat sources, chemicals, and moisture

Handling Precautions

Prevent edge gaps and cracks during slitting to avoid tearing
Avoid surface scratches that could compromise dielectric performance
Protect from oil, dust, and chemical contamination
Handle with clean gloves to prevent oil transfer from hands
Use appropriate cutting tools to ensure clean edges

Shelf Life & Re-Testing

Standard Shelf Life: 12 months from manufacturing date
Extended Storage: Material exceeding shelf life can be used after passing re-testing per technical requirements
Inspection: Visual inspection for delamination, discoloration, or contamination before use

9. Why Choose SIDA PMP Insulation Paper?

SIDA delivers premium PMP insulation paper combining cost-effectiveness with certified quality. Our three-layer composite structure ensures:

Reliable dielectric performance in voltage transformers up to 35kV
Proven thermal endurance for continuous Class B operation
Manufacturing flexibility with custom widths and thicknesses
Global compliance with UL, RoHS, and REACH standards
Supply chain reliability with 600 tons/month production capacity

Contact SIDA today for samples, technical specifications, and competitive pricing tailored to your insulation requirements.