Featured Cupstock & Coated Raw Materials for Cold Cups
High-purity food grade paper rolls and die-cut cup fans designed to withstand sub-ambient temperatures, high humidity, and prolonged ice melt stress.
Engineering Uncoated Cupstock for High-Humidity Cold Drink Applications
An exhaustive analysis of baseboard hydrodynamics, condensation management, edge-wick chemistry, and the transition toward next-generation sustainable barrier coatings.
In the rapidly modernizing fast-moving consumer beverage market, uncoated cupstock paper serves as the foundational substrate for all high-performance disposable paper containers. While hot beverage containers primarily manage internal thermal conductivity and liquid containment from within, cold beverage cups operate in an intensely challenging thermodynamic environment characterized by condensation (“cup sweating”), high interior hydrostatic pressure, and dual-sided moisture migration.
Thermodynamic Condensation Barrier
Cold beverages cause rapid ambient temperature drops along outer cup walls, triggering exterior air moisture condensation. Uncoated cupstock must possess dense internal sizing (AKD/ASA) and support flawless double-sided (2PE or aqueous) barrier lamination to prevent fiber softening.
Ultra-Low Edge-Wick Resistance
During die-cutting, raw fiber edges exposed at side seams and bottoms are vulnerable to capillary absorption. Our base cupstock is chemically treated to achieve edge-wicking rates below 0.8 kg/m² (24h at 4°C), eliminating side-wall darkening and seam leakage.
Precision Rim Formation & High Bulk
High-speed automated packaging machines (up to 300 cups/minute) require consistent cross-directional stiffness and tensile modulus. Our high-bulk 100% virgin pulp ensures uniform rim curling, leakproof bottom knurling, and rigid cup-top snap-lid retention.
Commercial Market Landscape & Global Beverage Trends
The exponential expansion of iced coffee, ready-to-drink (RTD) chilled teas, boba milk tea, carbonated fountain beverages, and blended fruit smoothies has revolutionized the demand for cold-cup packaging materials. Unlike hot beverages consumed quickly, cold drinks are often carried over extended periods in high-humidity ambient environments. This dynamic requires base cupstock papers that retain more than 85% of their original Taber stiffness when saturated with moisture vapor. Converting facilities worldwide are shifting toward heavy-basis-weight baseboards ranging from 170 gsm to 350 gsm to support large-format beverage cups (16 oz to 32 oz) without side-wall collapse.
Technical Comparison: Base Cupstock Performance Parameters for Cold vs. Hot Cups
| Technical Parameter | Standard Baseboard (Hot Cups) | Uncoated Cupstock for Cold Beverage Cups | Testing Standard |
|---|---|---|---|
| Internal Sizing Agent | Standard Internal Sizing (AKD) | Heavy Hydrophobic Sizing (AKD + Modified Rosin) | ISO 535 (Cobb 60s < 20 g/m²) |
| Edge Penetration (Edge-Wick) | ≤ 1.50 kg/m² (Room Temp) | ≤ 0.80 kg/m² (Low Temp 4°C & Lactic Acid Test) | Water Bath / Lactic Acid 24h |
| Tensile Strength MD/CD | MD ≥ 7.5 kN/m | CD ≥ 4.0 kN/m | MD ≥ 9.2 kN/m | CD ≥ 5.2 kN/m | ISO 1924-2 |
| Barrier Coating Structure | Single PE (1Side Inner) / Water Barrier | Double PE (2Sides) or Double Aqueous Dispersion | Extrusion Lamination / Gravure |
| Taber Stiffness Retention (Cold Wet) | ~50% – 60% after 2 hours | ≥ 85% Structural Retention under ice cond. | ISO 2493-1 |
| Food Safety & Extractables | FDA 21 CFR / ISO 9001 | FDA 21 CFR 176.170, FSC, BPA Free, PFAS Free | SGS / TÜV Rheinland Certified |
Key Application Scenarios in Modern Cold Cup Manufacturing
1. Automated High-Speed QSR Drink Dispensers: Fast-food chains and convenience stations utilize automated ice and soda dispensing machines. The uncoated cupstock used for these cups must exhibit zero ovalization during high-speed de-nesting and superior bottom knurling integrity under sudden cryogenic shock.
2. Hermetically Sealed Boba & Milk Tea Containers: The milk tea industry relies heavily on automated plastic and biopolymer film heat-sealing. Base cupstock must provide flat, smooth rim curling with uniform caliper tolerance (±2 μm) to ensure 100% airtight seals that prevent liquid leakage when the cup is inverted or shaken.
3. Frozen Desserts & Soft Ice Cream Cups: Dairy fat resistance and deep-freeze dimensional stability require high-density virgin kraft and bleached wood pulp bases that avoid micro-cracking at sub-zero storage (-18°C).
Nanning Paperjoy Paper Industry Co., Ltd.
Established in 2006, Paperjoy is a world-class integrated manufacturer specializing in food-grade raw materials for paper cups, food containers, and advanced packaging.
Pioneering High-Quality Cup Raw Materials
Nanning Paperjoy Paper Industry Co., Ltd. (“Paperjoy”) was established in 2006, with 200 employees and covers over 15000㎡. Paperjoy is a professional manufacturer of raw materials for paper cup and packaging box, especially the PE coated paper roll, paper cup fan, cup bottom reel and C1S ivory board. We are specializing in producing different kinds of PE coated paper raw materials. The annual production capacity is 60,000 tons.
Our factory ideally located at the heart of Nanning city economic zone, which is very near to Qinzhou port, Beibu Gulf at the South of China. Our 200 well-trained and technically sound staff are motivated towards accomplish a common goal of customer satisfaction and devoted to achieve “Honesty, Mutual benefit, Win-Win cooperation” business philosophy.
Corporate Milestones & Development
Set up in 2006, engaged in paper cup paper PE coating industry. Paperjoy, means good luck and happiness.
Developing B2B overseas market Expand the international market, target on Asia, Africa, Europe, North America, etc.
Brand-new production line, capacity doubled to be 60000 ton/year.
2022-Our products have been used in more than 2000 factories and exported to 60 countries since 2006.
Certification System & Global Food Contact Standards
PaperJoy’s quality assurance system applies to all of our processes and products. Our quality management program ensures that every product delivered meets or exceeds the quality standards required by our customers.
Plastics Association Member Unit
Certified association member promoting advanced processing technologies and eco-standards.
Charitable Enterprise
Active corporate social responsibility and sustainable green packaging advocacy.
Alibaba Gold Verified Partner
Global verified supplier status with flawless trade assurance record since 2006.
Core Raw Material Advantages & Strategic Mill Partnerships
Paperjoy factory located very near to several famous paper mill brands. Stora Enso, Sunpaper, APP, Yibin paper, and FiveStar paper etc… are our regular base paper suppliers.
Direct Strategic Sourcing
Paperjoy factory is located adjacent to major pulp & paper mills (Sun Paper, APP, Stora Enso, FiveStar), securing premium raw baseboard with stable delivery.
Sun Paper Strategic Alliance
Built a comprehensive strategic partnership with SunPaper Groups, ensuring guaranteed premium paperboard grade, zero batch variance, and consistent pricing.
Integrated One-Stop Manufacturing
With complete devices and equipment, we provide one-stop full processing: PE extrusion coating, high-precision flexo printing, die-cutting, waste stripping, and slitting.
Industrial Equipment & Operating Infrastructure
High-capacity automated machinery delivering consistent thickness, defect-free slitting, and vibrant multi-color food-grade flexo printing.
Office & Production Facility
Personnel Operation Process
Paper Cup Fan Roll Handling
Standardized material staging and automated web-guiding inspection prior to precision cutting.
High-Speed Die-Cutting
Automatic punch stamping ensuring precise arc tolerances and smooth rim edges without burrs.
Automated Waste Stripping
Clean clearing of residual paper borders to prevent debris contamination during cup forming.
Advanced Equipment Specifications
1. Three Extrusion Laminating Machines
Three laminating machines produce PE coated paper rolls. Auto high-speed production line, fit for fast delivery demand.
2. Three Flexo-Printing Machines
Three flexo-printing machines for printing paper cup fans in roll, 6-color high-speed printing, running stable, printing clear.
3. Eight Automated Die-Cutting Units
Eight die-cutting machines for die-cut paper cup fans. Completely automatically, high speed, more than 280 sheets/min max.
4. High-Speed Slitting Machine
One high-speed slitting machine to produce paper cup bottom rolls with burr-free edges.
5. High-Speed Sheet Cross-Cutter
One high-speed cutting machine for precision production of PE coated paper sheets.
6. Eleven Waste Clearing Stations
Eleven sets of standard cleaning machines for rapid clearing of scrap waste generated by various paper specifications.
Multistage Quality Inspection & Testing Rigor
From raw wood pulp fiber analysis to finished PE film adhesion and pinhole detection, Paperjoy operates an exhaustive 12-point quality testing framework.
Packaging and Global Container Delivery
Moisture-proof wrapping, reinforced wooden pallets, and edge-corner protectors safeguard every ton of cupstock against maritime humidity.
Premium Quality Assurance
Strict quality control system & international certification standards to ensure stable product quality.
Large-Scale Capacity
Advanced production lines & sufficient stock to meet your bulk orders and urgent delivery needs.
Customized Solutions
Customize paperboard raw material thickness (150g – 400g), width, colors, and coating performance.
Direct Factory Price
Direct factory sales without middlemen, providing you with the most cost-effective pricing.
PaperJoy Vision & Global Mission
Corporate Vision
Bring health & environmental protection to all over the world through sustainable, biodegradable, and recyclable food packaging substrates.
Mission: Global Leadership
To be the best global supplier of paper cup raw materials, empowering converters with flawless runnability and zero waste.
Mission: Staff Welfare
To be the happy home for staff, fostering a collaborative, technically sound, and safety-focused work culture.
Explore Our Full Range of Cupstock & Packaging Raw Materials
Factory-direct jumbo rolls, precision slit bottom reels, high-speed printed cup fans, and custom food-grade packaging boards.
