This product is a specialized industrial paper developed for the high-end electronics manufacturing sector. It is made from 100% imported virgin wood pulp using a Totally Chlorine-Free (TCF) bleaching process and advanced closed-loop deep desulfurization technology. The entire production process strictly excludes sulfur-containing additives (such as sulfur, sulfites, and sulfates) and chlorine-based bleaching agents. With sulfur and chlorine levels strictly controlled below 50 ppm, the paper offers exceptional chemical stability, non-corrosiveness, and high purity, making it an ideal material for packaging and protective separation in the manufacturing of semiconductors, chips, and precision electronic components.
Graded Sulfur Content Standards
1. General Industrial Grade: Total sulfur ≤ 50 ppm
2. Electronics/PCB Precision Grade: Total sulfur ≤ 20 ppm (specifically for immersion silver boards)
3. Food/Medical/Cultural Relic Grade: Total sulfur ≤ 10 ppm; high-end specifications can reach ≤ 2 ppm
Basic Physicochemical Properties
• pH Value: 7.0–8.5 (neutral to mildly alkaline; no acidic corrosion)
• Free from fluorescent agents, formaldehyde, and heavy metals; low-linting/dust-free
• Temperature Tolerance: -20°C to 80°C; no yellowing or sulfur gas emission at high temperatures
• Environmental Compliance: RoHS, REACH, and FDA certification (food contact) compliant
Key Product Features
Oxidation and Corrosion Resistance
Blocks sulfur sources to prevent the sulfidation and blackening of silver, copper, nickel, and gold-plated components, ensuring long-term color stability for immersion-silver PCBs and silver-plated parts.
01
Neutral and Durable
Acid-free composition prevents embrittlement and acidification during long-term storage, offering a lifespan of over a century.
02
High Cleanliness and Low Dust
Manufactured in cleanrooms; features a smooth surface that does not shed particles or scratch precision components and optical lenses.
03
Toughness Suitable for Automation
Tensile strength ≥45N/15mm and fold endurance ≥500 cycles ensure the material does not break during slitting, interleaving, or automated packaging processes.
04
Eco-friendly and Biodegradable
Made from pure plant fibers; free from harmful residues and naturally biodegradable, meeting strict environmental standards for export.
05
Product Specifications
|
Classification |
Specifications/Form |
Applicable scenarios/notes |
|
Weight (mainstream) |
30g,40g,60g,70g,80g/m² |
Common mainstream weight specifications |
|
30–35g (Ultra-thin version) |
Electronic isolation of chips, wafers and small parts |
|
|
35–80g (Universal model) |
PCBs, hardware, and food packaging (most common on the market) |
|
|
More than 100g (thick version) |
Heavy metal compartment, high temperature bottom |
|
|
Size and Shape |
Flat sheet |
Standard sizes: 787×1092mm and 898×1194mm; custom slitting to any size is available. |
|
reel |
Width customized to requirements; compatible with automatic paper-interleaving machines. |
|
|
Slitting |
Narrow-width carrier tape for continuous terminal packaging |
Key Application Industries
Electronics & PCB (Highest Volume): Used for process isolation and packaging of immersion silver/gold-plated boards, FPCs, and chips; prevents oxidation and yellowing.
Precision Hardware: Used as interleaving paper and for shipping packaging for plated parts, jewelry, and optical accessories.
Food Packaging: Used for baking liners and as interleaving or lining paper for meat and pastries; safe and free of sulfur residue.
Cultural Relics & Art: Used for the protective interleaving of ancient books, calligraphy, paintings, and collectibles; helps delay paper aging.
Medical & Optics: Used for dust-free isolation and clean lining paper for lenses and medical instruments.
Storage and usage precautions
1. Storage environment: 18~25℃, dry and ventilated, sealed to avoid light and moisture, and away from acid and alkali gases.
2. Safety and timeliness: Keep away from fire sources, oil pollution and chemicals. It is forbidden to stack in the open air. The shelf life is 12 months.
3. Operating specifications: Wear sulfur-free anti-static gloves when contacting precision metals. It is strictly forbidden to touch metal surfaces with bare hands.
4. Prevent cross-contamination: Do not mix with ordinary sulfur-containing paper and newspapers.
5. Selection suggestions: For high-temperature baking/passing scenarios, thickened and high-temperature-resistant paper must be used to prevent damage.
FAQ
Q: What is sulfur-free and chlorine-free paper?
A: This is a specialized industrial packaging material developed for high-end precision manufacturing. Made from high-purity virgin wood or bamboo pulp, it is produced without the use of any sulfur- or chlorine-containing chemical additives, offering superior protection for sensitive components such as microchips.
Q: What is the sulfur content of the product?
A: Sulfur content can be controlled to meet specific customer technical requirements, with levels kept below 50 ppm. Specific specifications can be customized based on application scenarios, testing standards, and procurement requirements, and corresponding test data can be provided.
Q: What is the chlorine content of the product?
A: Chlorine content is strictly controlled and kept below 50 ppm, making the product suitable for high-end electronic applications that are sensitive to chloride ions, halogens, and potentially corrosive contaminants.
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