Kangchuang interleaving paper provides a precision surface protection barrier between stacked glass panels, PCB boards, solar cells, and precision metal components — preventing micro-scratches, surface contamination, static discharge, and moisture-related damage during manufacturing, storage, and global shipping. As a specialist interleaving paper manufacturer based in Dongguan, China, with over 20 years of production experience, we supply glass factories, PCB manufacturers, solar panel plants, and precision hardware companies across the USA, Europe, and Asia with acid-free, lint-free, and pH-neutral separator paper — factory-direct, with custom GSM and width options, and free DHL Express samples to the United States.
Custom GSM, Width & Format: Available from 17gsm tissue-weight to 120gsm heavy interleaving paper, precision-slit from 100mm to 1,600mm roll widths. Sheet and roll formats both available. MOQ from 500kg with fast 10–15 day production lead time.
What is Interleaving Paper?
Interleaving paper — also called partition paper, separator paper, or glass separator paper — is a purpose-engineered industrial paper designed to be placed between the surfaces of stacked or packaged items during manufacturing, storage, and transit. Its primary function is surface protection: preventing contact-induced damage such as micro-scratches, surface contamination transfer, stacking pressure marks, and moisture condensation damage between adjacent surfaces.
Unlike general-purpose wrapping paper or tissue paper, industrial interleaving paper is manufactured to precise specifications for surface smoothness, pH neutrality, absence of abrasive particles, controlled fiber structure, and — in specialty grades — anti-static and anti-mold properties. These engineered characteristics make it the required material for protecting high-value surfaces in glass manufacturing, printed circuit board production, solar photovoltaic manufacturing, optical lens production, and precision metal component handling.
The term ‘partition paper’ is more commonly used in Chinese industrial contexts and by East Asian manufacturers. ‘Interleaving paper’ is the preferred term in US, European, and global B2B purchasing environments — which is why both terms appear on this page. If you are searching for ‘glass separator paper’, ‘PCB separator paper’, ‘photovoltaic separator paper’, or ‘solar cell interleaving paper’, you have found the right product.
Why Surface Protection Paper Matters — The Physics of Scratch Formation
When two hard, smooth surfaces are placed in direct contact under the pressure of stacking weight, any particle or fiber harder than the softer surface — even particles as small as 5 microns — acts as an abrasive agent. Under the weight of stacked glass panels (which can exceed 500kg per pallet), even microscopic fiber particles or mineral inclusions in low-grade paper can create visible scratch lines on polished float glass surfaces, ITO-coated touchscreen glass, or optical glass.
The solution is not simply using any paper — it is using paper specifically engineered with a controlled surface smoothness profile (measured in Sheffield Smoothness Units or Bekk smoothness seconds), a verified absence of abrasive mineral filler particles above a critical size threshold, and a pH value that does not promote surface etching of glass or metal over extended contact time.
Kangchuang interleaving papers are manufactured and tested to meet these requirements for each application type. Glass separator paper grades use higher smoothness specifications and lower filler content than PCB partition paper grades, which in turn use different static-dissipation characteristics than photovoltaic separator paper. Each sub-product is optimized for its specific application — not a generic paper sold into multiple markets.
| SPECIFICATION | GLASS SEPARATOR | PCB PARTITION | PV SEPARATOR | STEEL / METAL |
|---|---|---|---|---|
| GSM Range | 17–60gsm | 40–80gsm | 17–40gsm | 60–120gsm |
| Surface Smoothness | High (150+ Sheffield) | Medium (100–150) | Medium-High | Standard |
| pH Value | 6.5–8.5 | 6.5–8.5 | 6.5–8.5 | 6.5–8.5 |
| Acid-Free | ✅ Yes | ✅ Yes | ✅ Yes | ✅ Yes |
| Anti-Static Option | Available | ✅ Standard | ✅ Standard | Available |
| Anti-Mold Option | ✅ Available | Available | Available | ✅ Available |
| Roll Width Range | 200–1,600mm | 100–1,200mm | 100–800mm | 300–1,600mm |
| Sheet Sizes | Custom cut | Custom cut | Custom cut | Custom cut |
| Moisture Content | 5–8% | 5–7% | 4–7% | 5–9% |
| Fiber Type | Virgin cellulose | Virgin cellulose | Virgin cellulose | Virgin / recycled |
| Color | White / off-white | White / yellow | White | White / natural |
| MOQ | 500kg | 500kg | 500kg | 500kg |
| Lead Time | 10–15 days | 10–15 days | 10–15 days | 10–15 days |
These three terms describe the same product category — paper placed between surfaces to prevent contact damage during stacking, storage, and transport. ‘Interleaving paper’ is the preferred term in US and European industrial contexts. ‘Partition paper’ is commonly used in Chinese and East Asian manufacturing. ‘Separator paper’ is used in the glass industry specifically. On this page and throughout our catalog, we use all three terms interchangeably, but our products are identical regardless of which term you use to describe them.
For standard float glass panels (4–12mm thickness, standard architectural use), 40–60gsm is the most commonly specified interleaving paper weight. Thinner paper (25–40gsm) can be used for lighter panels where weight is a concern, but may not provide adequate cushioning under high pallet stacking loads. For extra-large or extra-heavy glass panels, 60–80gsm provides better load distribution. When in doubt, request a multi-grade sample pack from Kangchuang — we will include 40gsm, 50gsm, and 60gsm samples and you can test under your actual stacking conditions.
When the correct grade is properly selected and applied, interleaving paper reduces surface scratch incidence to near-zero for standard handling conditions. The paper must: (1) completely cover the glass surface with no uncovered edges that could contact the next panel, (2) be free from wrinkles or folds that create localized pressure points, and (3) be the correct smoothness grade for your glass type. For coated glass types (ITO, low-e, anti-reflective), request our high-smoothness grades with Sheffield values above 200 — standard interleaving paper may still cause micro-scratch damage on these soft-coated surfaces.
Glass mold (also called ‘glass bloom’ or ‘glass stain’) during sea freight is a well-known problem caused by moisture condensation inside shipping containers combined with organic material in the interleaving paper acting as a food source for mold spores. Kangchuang offers an anti-mold interleaving paper grade containing approved mold-inhibiting agents (IPBC-based or equivalent) that prevent fungal growth on glass surfaces during sea freight transit periods of up to 60 days in tropical shipping conditions. If your glass is experiencing mold damage during container shipping, this grade is specifically designed to solve that problem.
For PCB interleaving, the key requirements are: pH neutral (6.5–8.5) to prevent substrate etching, lint-free surface to prevent particle contamination of solder pads, and ESD-safe surface resistance (10⁶–10⁹ Ω/sq) for assembled boards containing ESD-sensitive components. For bare boards without surface finish: 40–60gsm standard interleaving paper is typically adequate. For ImAg or OSP-finish boards: combine with our sulfur-free paper for chemical protection. For assembled boards with ESD-sensitive ICs: use our anti-static interleaving paper grade. Contact us with your specific PCB type and we will recommend the optimal combination.
Photovoltaic separator paper (PV separator paper) is a lighter-weight, higher-conformability interleaving paper specifically designed for silicon wafers and solar cells. The key differences from standard interleaving paper are: lower GSM (17–40gsm vs 40–80gsm for glass applications), higher softness and conformability to cushion fragile 180–200 micron silicon wafers, anti-static surface treatment to prevent wafer-to-wafer static adhesion on automated handling equipment, and controlled cleanliness (no particles above 50 microns that could cause pressure points on the wafer surface). PV separator paper is a specialty product — not all interleaving paper manufacturers produce it to the required specification.
Yes. Kangchuang supplies interleaving paper in three formats: rolls (standard), sheets cut to specified dimensions (±2mm tolerance), and die-cut sheets with custom shapes or corner cuts. Pre-cut sheets are available in any dimension up to our maximum roll width of 1,600mm. Minimum order quantities for pre-cut sheets are typically 2,000kg (to justify the sheeting machine setup). For smaller quantities of pre-cut sheets, we can supply in roll format with a cutting specification guide so your team can cut in-house, or we can discuss smaller-MOQ custom cutting arrangements.
Yes. All Kangchuang interleaving paper grades are manufactured to be acid-free, with a pH value in the range of 6.5–8.5 (measured using TAPPI T509 or equivalent cold extract method). Acid-free designation means the paper does not contain acidic compounds (such as alum or rosin size) that would create an acidic microenvironment during storage, and does not produce acidic degradation products as the paper ages. This is particularly important for long-term glass storage applications (where acid etching of the glass surface can occur over months of contact) and for PCB substrate protection (where acidic compounds could degrade the epoxy laminate surface finish).
Anti-static interleaving paper contains a surface coating or additive that reduces the paper’s natural tendency to generate and hold electrostatic charge when separated from surfaces. Standard paper has very high surface resistance (10¹²–10¹⁴ Ω/sq), which means it accumulates static charge during handling — when you remove standard paper from between PCBs or silicon wafers, the paper can discharge several thousand volts to the component surface. Anti-static interleaving paper (surface resistance 10⁶–10⁹ Ω/sq) dissipates this charge safely, preventing ESD damage to sensitive semiconductor devices, IC chips, and RF components. If your product contains any ESD-sensitive electronic components, anti-static interleaving paper is required, not optional.
For standard production orders: minimum 500kg, which typically represents 1–2 pallets depending on the GSM and roll width. For sample evaluation: minimum 1 roll (approximately 30–50kg depending on GSM), shipped via DHL Express at no charge to USA, EU, and most international destinations. For container-load orders: a standard 20-foot container holds approximately 15–20 metric tons of interleaving paper depending on GSM. We offer our best FOB Dongguan pricing for container-load orders and can combine multiple product types (e.g., glass separator paper + PCB partition paper) in a single container shipment.
Yes — custom width production is one of our core capabilities. Our slitting equipment handles master roll widths up to 1,600mm and can precision-slit to any customer-specified width with ±0.5mm edge tolerance. Many of our customers operate automated glass handling lines or PCB assembly machines that require interleaving paper fed from rolls at specific widths to match their conveyor or insertion equipment specifications. We can produce any width from 100mm upward in continuous roll form, with specified core diameter and roll length per customer requirement. Please specify your equipment’s roll width requirement when requesting a quote.
Yes. Kangchuang ships interleaving paper to glass factories, PCB manufacturers, solar panel assembly plants, and industrial packaging companies throughout the United States. Sample shipments are sent via DHL Express (3–5 business days to most US locations) at no charge to the buyer. Production orders are shipped by sea freight FOB Dongguan (approximately 15–20 days to US West Coast ports, 20–28 days to East Coast ports). We prepare all required US import documentation including commercial invoice, packing list, certificate of origin (Form A), and HS code classification guidance. Contact us with your facility’s US address and we will prepare a full delivered cost quote including freight and customs duties estimate.
Kangchuang Paper specializes in high-quality industrial papers — sulfur-free, coated, release, and anti-rust. Tell us your requirements and we’ll recommend the right grade with fast turnaround.
