PCB Kraft Paper [160g/190g/240g]High Temperature Resistance custom size

The Complete Guide to High-Temperature Circuit Board Processing

Quick Navigation

• What is PCB Kraft Paper?
• PCB Kraft Paper Specifications
• PCB Cushion Paper Benefits
• PCB Press Paper Applications
• Circuit Board Paper Selection Guide
• Ordering PCB Kraft Materials
• Expert FAQs: PCB Pressing Paper

What is PCB Kraft Paper?

PCB kraft paper, also known as circuit board cushion paper or PCB pressing material, is a specialized high-temperature resistant paper essential for printed circuit board manufacturing. Made from premium virgin wood pulp, this lamination paper ensures optimal performance in PCB, FPC, and CCL production processes.

Key PCB Paper Specifications:

• Available Weights: 160G and 190G PCB press paper
• Minimum Order Quantity: 2 ton
• Core Feature: Heat resistance up to 230℃

PCB Kraft Paper Technical Details

| Property                | 160G Kraft Paper     | 190G Kraft Paper     |
|------------------------|----------------------|----------------------|
| Paper Weight           | 160±5 g/m²           | 190±5 g/m²           |
| Thickness              | 0.22±0.03 mm         | 0.26±0.03 mm         |
| CD Tensile Strength     | ≥5.0 kgf/15mm       | ≥5.0 kgf/15mm       |
| MD Tensile Strength     | ≥6.5 kgf/15mm       | ≥6.5 kgf/15mm       |
| Pressing Cycles        | 3~5 times            | 3~5 times            |
| Air Permeability       | ≥6.35 um/Pa.s        | ≥6.35 um/Pa.s        |
| Moisture Content       | 3~8%                 | 3~8%                 |

PCB Cushion Paper Benefits: Why Choose Our Material?

1. Superior Heat-Resistant PCB Paper Performance

• Temperature Tolerance: Withstands extreme heat (≥230℃)
• Consistent Heat Transfer: Ensures uniform PCB lamination
• Enhanced Press Elasticity: Improves production yield

2. Circuit Board Paper Physical Properties

• Exceptional Flatness: Free from defects
• Uniform PCB Paper Thickness: Ensures consistent results
• Optimal Moisture Control: Prevents adhesion issues

3. PCB Kraft Paper Quality Assurance

• Smooth, uniform fiber structure
• Contaminant-free PCB pressing material
• ISO, FSC, and SGS certified circuit board paper

PCB Press Paper Applications: Manufacturing Uses

Our high-temperature PCB kraft paper serves multiple critical functions in circuit board production:

1. Essential PCB Manufacturing Functions

1. Heat preservation in lamination
2. Moisture absorption during pressing
3. Pressure distribution for PCB layers
4. Cushioning for delicate components
5. Thermal transfer optimization

2. PCB Paper Impact on Production Quality

• Enhances printed circuit board quality
• Reduces PCB defect rates
• Improves lamination consistency
• Extends press plate lifespan

Circuit Board Paper Selection Guide

Choosing the Right PCB Kraft Paper

Factors Influencing PCB Kraft Paper Selection

Temperature Requirements

Different PCB manufacturing processes necessitate specific temperature tolerances, which influence the selection of kraft paper:

Process Type	Required Temperature	Recommended Paper
Standard PCB Lamination	180-200°C	160G Kraft Paper
High Tg PCB Production	200-230°C	190G Kraft Paper
Lead-Free PCB Assembly	>230°C	240G High-Temp Paper

PCB Layer Count Impact

The number of layers in a PCB significantly affects kraft paper selection. The requirements vary based on layer count:

Layer Count	Paper Weight	Reasoning
1-4 layers	160G	Adequate cushioning for simpler boards
6-8 layers	160G or 190G	Depends on pressure requirements
10+ layers	190G	Enhanced pressure distribution needed

Production Volume Considerations

The scale of production influences the optimal choice of kraft paper:

Daily Production Volume	Recommended Approach
<1000 sq ft	160G paper, 3-4 pressing cycles
1000-5000 sq ft	Mix of 160G/190G, 3 pressing cycles
>5000 sq ft	190G paper, 2-3 pressing cycles

Technical Specifications for PCB Paper Selection

Critical Parameters

1. Air Permeability

• Optimal Range: 6.35-8.00 um/Pa.s
• Impact on Production:
  • Too low: Can trap air bubbles during the lamination process, leading to defects in the final product.
  • Too high: May cause resin bleed-out,>8%: Risk of delamination, May cause resin bleed-out, compromising the integrity of the PCB and affecting its performance.

1. Moisture Content Analysis

• Moisture % Effects on PCB Production:
  • <3%: Too dry, may cause static issues,
  • 3-8%: Ideal range for most applications

Surface Properties

The properties of kraft paper also affect PCB quality:

Property	160G Paper	190G Paper
Roughness (μm)	2.5-3.5	3.0-4.0
Density (g/cm³)	0.75-0.80	0.80-0.85
Thickness Variation	±0.03mm	±0.03mm

Application-Specific Selection Guide

1. Flexible PCB Manufacturing

• Recommended Paper: 190G with high elasticity
• Key Properties:
  • Smooth surface (Ra < 2.5μm)
  • Enhanced conformability
  • Uniform thickness (±0.02mm variation)

1. High-Density Interconnect (HDI) PCBs

• Optimal Choice: 240G premium grade
• Critical Factors:
  • Superior pressure distribution
  • Minimal thickness variation (±0.02mm)
  • Enhanced heat resistance (>230°C)

1. Special Applications

• RF/Microwave PCBs: Low dielectric 190G with minimal moisture content (<5%)
• Heavy Copper PCBs: High-density 240G for enhanced pressure resistance
• Medical Grade PCBs: Ultra-clean options in either 190G or 240G, certified contamination-free

Quality Verification Methods

Essential Tests for PCB Kraft Paper

1. Tensile Strength Test

• MD (Machine Direction): ≥6.5 kgf/15mm
• CD (Cross Direction): ≥5.0 kgf/15mm

1. Thermal Stability Test

• Method: Exposed to 230°C for 2 hours
• Acceptable Results:
  • Color change: ΔE < 3.0
  • Dimensional change: <0.5%

Performance Validation

Test types and acceptance criteria include:

Test Type	Standard Method	Acceptance Criteria
Heat Resistance	IPC-TM-650 2.4.25	No blistering at 230°C
Moisture Content	ASTM D6443	≤8% at 23°C, 50% RH
Thickness Uniformity	ISO 534	Variation ≤ ±0.03mm

Cost-Effective Selection Strategies

Balancing Cost and Performance

1. Entry Level:

• 160G paper for basic applications.
• Cost: Generally lower by 15-20% than 190G.

1. Mid Range:

• Mixed usage of 160G and 190G.
• Optimizes cost for volume production.

1. Premium Level:

• 240G paper for high-end applications.
• Higher initial investment but superior results.

Optimization Tips

1. Storage Optimization

• Temperature: 20-25°C
• Humidity: 45-55% RH
• Shelf life: Up to 12 months when properly stored.

1. Usage Optimization

Paper Weight        Optimal Pressing Cycles        Cost Per Cycle
160G                2-3 cycles                     Lower
190G                2-3 cycles                     Higher initial, better long-term value
240G                2-3 cycles                     Higher initial, better long-term value

PCB Pressing Material Best Practices

1. Store PCB kraft paper in controlled environments
2. Inspect paper before use in circuit board pressing
3. Follow recommended pressing cycles
4. Monitor moisture content for optimal results

Ordering PCB Kraft Materials: Purchase Guide

PCB Paper Packaging Options

• Sheet-form PCB kraft paper
• Roll-form circuit board paper
• Custom sizes available

Delivery & Sampling

• Lead Time: 5-25 working days
• Shipping Ports: Guangzhou or Shenzhen
• Sample Option: Free A4 size PCB paper samples

Expert FAQs: PCB Pressing Paper

Q: How many times can PCB kraft paper be reused? A: Both 160G and 190G PCB press paper can be used 3-5 times in standard pressing operations.

“The specific number of times PCB Kraft paper can be used in the lamination process depends on various factors such as the temperature, pressure, and duration of the pressing cycle.”

Q: Why is moisture content important in PCB paper? A: The 3-8% moisture content is optimized to prevent adhesion while maintaining paper performance during circuit board pressing.

Q: Can I use standard kraft paper for PCB manufacturing? A: No, specialized high-temperature resistant PCB kraft paper is required for proper circuit board production.

Conclusion: Advanced PCB Kraft Paper Solutions

Our high-temperature PCB kraft paper is engineered to meet and exceed the demanding requirements of modern printed circuit board manufacturing. With superior heat resistance, consistent quality, and multiple thickness options, it’s the preferred choice for ensuring high-quality circuit board production.

Why Choose Our PCB Press Paper?

• ✓ Industry-leading heat resistance
• ✓ Consistent quality in every batch
• ✓ Optimal for various PCB applications
• ✓ Comprehensive quality certifications

Ready to Enhance Your PCB Production?

Contact our PCB paper experts today for:

• Custom PCB kraft paper specifications
• Bulk pricing on circuit board materials
• Technical support for paper selection
• Free PCB press paper samples

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Trust our PCB kraft paper for your circuit board manufacturing needs – Where quality meets innovation in PCB production materials.