Premium-grade fully-cured (C-stage) cellulose filter paper rolls designed for heavy-duty automotive and industrial filtration. Impregnated with 20%-24% fully cross-linked phenolic resin, it requires absolutely no thermal curing after pleating. Offers an outstanding dry burst strength of ≥320 kPa and unmatched moisture resistance—perfectly compatible with our Precision CNC Knife Pleating Machine.
This high-performance Premium Fully-Cured Cellulose Filter Paper (internally saturated with 20%-24% fully cross-linked C-stage phenolic resin) is engineered specifically for high-efficiency automotive oil filters, diesel fuel separators, and heavy-duty industrial air intake systems.
Unlike ordinary semi-adhesive or semi-gelatinous papers, this premium wood pulp paper is 100% cured during the manufacturing process at the paper mill. It arrives at your factory floor fully solidified and water-resistant, completely eliminating the need for energy-consuming post-pleat thermal curing ovens. This allows filter manufacturers to streamline their assembly lines, save massive workshop floor space, and reduce electricity costs.
Technical Specifications
The factual mechanical parameters and material properties of our Premium Fully-Cured Cellulose Filter Paper are detailed below:
Technical Parameters
Factual Specifications
Material Composition
100% Premium Long-Fiber Cellulose (Wood Pulp)
Resin Type
Premium Fully-cured (C-stage) Phenolic Resin
Resin Content
20% – 24%
Basis Weight
130 ± 5 g/m²
Thickness
0.48 ± 0.03 mm
Corrugation Depth
0.22 – 0.30 mm
Air Permeability
180 – 240 L/m²/s (at pressure drop Δp = 200 Pa)
Mean Pore Size
35 – 45 μm
Burst Strength (Dry)
≥ 320 kPa
Burst Strength (Wet)
≥ 220 kPa
Resin Curing State
100% Fully-Cured (No post-pleating thermal baking required)
Key Features & Performance Advantages
1. Zero Post-Pleat Curing Required (100% Pre-Cured)
Impregnated with fully cross-linked phenolic resin, this paper is completely polymerized before rolling. This eliminates the need for expensive, energy-consuming post-pleat curing ovens in your factory, saving massive electricity costs and workspace.
2. Unmatched Wet Burst Strength (≥220 kPa)
The fully polymerized resin network locks the wood pulp fibers in a highly hydrophobic structure. The pleated paper retains 100% of its rigidity and burst strength even when completely submerged in water, oil, or diesel fuel, preventing filter collapse.
3. High-Precision Micro-Pore Filtration
Offers an exceptionally fine mean pore size (35–45 μm) for high-precision filtration. It efficiently intercepts fine engine wear debris, combustion soot, and water droplets, making it the perfect media for spin-on oil and diesel separators.
4. Deep-Corrugated Embossing
Features a deep corrugation profile (0.22 – 0.30 mm) that prevents pleat collapse under high pressure, maintaining a constant effective filtration area under heavy oil or air flow.
Applications & Industrial Uses
This premium fully-cured wood pulp filter paper roll is the preferred media for manufacturing:
Spin-on Oil Filters: High-durability oil filter elements for passenger cars and commercial trucks.
Diesel Fuel Separators: Multi-stage water and particulate diesel fuel filter cartridges.
Heavy-Duty Industrial Air Filters: Intake filtration elements operating in extremely wet, humid, or oily environments.
Why Partner with Fupei?
Verified Machine Compatibility: Since fully-cured paper is stiffer and more brittle to fold, we test our rolls directly on our Precision CNC Knife Pleating Machine. We optimize the folding blade configurations to ensure crisp, crack-free folding on pre-heated fully-cured media.
Strict Quality Control: Every roll is tested for basis weight, thickness, and permeability in our state-of-the-art QC laboratory to ensure uniform batch consistency.
Sealed Moisture-Proof Packaging: Rolls are wrapped in heavy-duty moisture barrier PE film and packed in export-grade cardboard boxes to protect the raw media during sea freight.
Frequently Asked Questions
A: “All-rubber” (fully-cured) means the phenolic resin within the wood pulp fibers is 100% cross-linked and cured (C-stage) during the manufacturing process at the paper mill. The paper is already fully stiff and moisture-resistant out of the roll and requires absolutely no post-pleating thermal curing.
A: Yes. Since fully-cured paper is stiffer and more brittle, it is highly recommended to pre-heat the paper rolls using the heating plates on our Precision CNC Knife Pleating Machine before folding. Pre-heating increases the flexibility of the cured resin, ensuring crack-free pleating.
A: Yes, absolutely. With its fine mean pore size (35–45 μm), high basis weight (130g/m²), and extreme wet burst strength (≥220 kPa), this fully-cured cellulose paper is specifically engineered for automotive spin-on oil filters and diesel fuel separators.
