Featured Cup Bottom Raw Material Series
Precision slit rolls, die-cut blanks, and dual-layer extrusion paperboard optimized for hot, cold, and frozen beverage container bases.
The Industrial Science of Double PE Coated Cup Bottoms
In modern disposable packaging manufacturing, the container bottom is subjected to the highest physical demands. While single PE coated paper suffices for basic hot drinks where moisture is predominantly internal, Double PE Coated Paper for Cup Bottom Production is an indispensable industrial standard for cold beverages, frozen desserts, and oily food containers.
When chilled liquids or ice-blended beverages are poured into a cup, ambient humidity triggers condensation on the cup’s outer walls. This moisture inevitably migrates downward toward the bottom rim knurl. Without an exterior polyethylene protective film, the exposed raw cellulosic fibers at the bottom cut-edge absorb moisture through capillary wicking. This weakens the structural integrity, leading to bottom softening, seam delamination, and catastrophic leakage.
By extruding a pinhole-free LDPE/HDPE barrier on both sides of premium virgin baseboard, Paperjoy’s double PE paper creates a dual-side hermetic seal. The interior polymer layer forms a thermo-fusion bond with the cup wall fan, while the exterior polymer prevents ambient moisture absorption, ensuring unmatched rigidity and leak prevention across extreme thermal variations (-20°C to 100°C).
Technical Superiority: Single PE vs Double PE Bottoms
Bottom knurling machines operating at 180–300 cups/minute require uniform polymer flow and precise cross-directional (CD) tensile strength. Double PE coated bottom reels ensure that heat applied during high-speed thermal or ultrasonic hem-folding melts both contact surfaces simultaneously, yielding a 100% bonded molecular weld.
| Critical Parameter | Single PE Bottom | Double PE Bottom (Paperjoy) |
|---|---|---|
| Condensation Resistance | Vulnerable to bottom softening | 100% Waterproof dual barrier |
| Sealing Method | Hot-air thermal only | Thermal & Ultrasonic compatible |
| Cold Beverage Shelf Life | 1–2 Hours before wicking | 24+ Hours stable structural hold |
| Bottom Rim Stiffness | Standard retention | High-rigidity knurl retention |
Target Application Scenarios & Conversion Performance
Engineered to excel across diversified converting machines and demanding commercial environments.
Cold Drink & Soda Fountain Cups
Chilled carbonated soft drinks, iced tea, and bubble tea cups endure heavy outer condensation (“sweating”). Double PE coated bottoms prevent bottom sag, maintaining a crisp rim standing base even under prolonged high humidity.
Ice Cream Tubs & Frozen Dairy
Deep-freeze storage (-18°C to -25°C) followed by rapid thawing stresses paper fibers. Double PE coating provides vapor-proof barrier protection that stops frost expansion from cracking the bottom seal seams.
Instant Noodle & Hot Soup Bowls
High-temperature boiling broths and oily liquids exert heavy hydrostatic pressure on container bases. Double PE coated heavy-gauge paperboard provides superior burst strength and prevents hot oil strike-through.
Company Profile
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.
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. Besides, we have built a comprehensive strategic partnership with SunPaper Groups, reliable paper quality and steady delivery time are guaranteed. With complete devices and equipment, we are capable of providing one-stop service of PE coated, printing, die cutting, cleaning off and slitting.
Development Milestones
Consistent expansion, technological refinement, and global supply chain integration since 2006.
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.
Vision
Bring the health & environmental protection to all over the world.
Mission 1
To be the best global supplier of paper cup raw material.
Mission 2
To be the happy home for staffs.
Our Core Advantages
Integrating prime raw materials, massive production capacities, and precision converting infrastructure.
PaperJoy Global Service
Your Reliable Global Partner for High-Quality Professional Paper Cup Raw Materials Supplier and Manufacturer & Professional Solutions.
Customized Products
We can provide customers with customized paperboard raw material products according to their needs and requirements to meet their different needs and application scenarios.
Diverse Products
We offer a variety of paperboard raw material products, including PE coated Paper Roll, PE Coated Paper Sheet, Paper Cup Fan, C1S Ivory Board, Kraft Paper Roll, and more, to meet the different needs and application scenarios of our customers.
Free Quotations & Samples
We provide free samples and quotes to ensure that our customers can experience our high-quality paperboard raw materials firsthand and make informed purchasing decisions.
Fast Delivery
With an efficient production and supply chain management system, we can ensure that customers get the required paperboard raw materials in the shortest possible time and meet their needs.
Technical Consulting
Our professional technical team can provide customers with professional consulting services, such as product specifications, technical parameters, and production processes, to help customers make informed decisions and solve any problems that may arise.
Professional Technical Support
We have a professional technical team and after-sales service team to provide customers with technical support and after-sales service, ensuring comprehensive support and assistance for customers using our products.
Certification System
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.
FSC-COC
BPA, Phthalates, PFAS Free
ISO 9001:2015
REACH, TPCH
FDA 21 CFR 176.170
CNAS Certified
Honor & Industry Standing
Plastics Association Member Unit
Charitable Enterprise
Alibaba Gold Supplier
Factory Tour & Precision Machinery
State-of-the-art automatic extrusion lines, high-speed flexo presses, and computer-controlled slitting systems.
1. Three laminating machines are used to produce PE coated paper rolls. Auto high-speed production line, fit for fast delivery demand.
2. Three flexo-printing machines for printing paper cup fans in roll, six color high-speed flexo printing, running stable, printing clear.
3. Eight die-cutting machines for die-cut paper cup fans. completely automatically, High speed, more than 280 sheets/min max.
4. One high-speed slitting machine for produce paper cup bottom roll.
5. One high-speed cutting machine for the production of Pe coated paper sheets.
6. Eleven set of product standard machine. Cleaning the waste generated by various specifications of paper.
Personnel Operation Process & Environment
Comprehensive Quality Inspection Lab
Rigorous testing across every extrusion meter: edge-wicking resistance, grammage calibration, stiffness index, and heat-seal durability.
Factory Overview & Production Scale
Extensive infrastructure driving reliable, high-volume container raw material manufacturing.
Strict Quality Control Processes
• Raw material inspection: Select high-quality pulp and coating materials to ensure source reliability.
• Real-time production monitoring: Avoid defective products in each conversion link.
• Finished product testing: Tensile strength, waterproof, environmental protection indicators.
• Batch sampling inspection: Sample records archived for full quality traceability.
Advanced Production & Supply Capacity
• Multiple automatic lines with 60,000 tons annual capacity.
• 15,000 ㎡ standard factory space ensures robust production & buffer warehousing.
• Continuous technology upgrades optimize yield and cost efficiency.
• Bulk orders completed within 7-15 working days based on GSM and slit specs.
Customized Service For Your Needs
• Custom paperboard thickness (150g – 400g) for varied cup volume needs.
• Custom polymer coatings: tailored waterproof, grease-proof, and heat resistance.
• Custom colors/patterns with food-grade ink matching brand requirements.
• Free prototyping and laboratory test samples before bulk commitment.
Eco-Friendly & Sustainable Products
• 100% recyclable virgin wood pulp conforming to global eco-trends.
• Non-toxic food-grade coating compliant with FDA and FSC standards.
• Biodegradable options available for specific regional compliance.
• Green production processes prioritizing reduced carbon footprint.
Packaging And Global Logistics
Technical Guide & Cup Bottom Sourcing FAQ
Expert recommendations for optimizing knurling speed, coating ratios, and waste reduction.
Q: What is the ideal base paper and PE coating GSM for double PE cup bottoms?
For standard 8oz–16oz cold cups, cup bottoms typically employ 170g–230g base paper + 15g PE (inside) + 15g PE (outside) or an asymmetrical 18g/15g distribution. For larger 22oz–32oz containers and soup bowls, 240g–280g base paper provides the requisite burst and bending stiffness to withstand high hydrostatic column forces.
Q: Why do single PE bottom rolls cause problems on ultrasonic cup machines?
Ultrasonic horns generate localized acoustic friction heat that bonds polymer-to-polymer. If the outer side of the bottom rim is uncoated raw paperboard, there is insufficient polymer mass to create an instant fusion bond with the exterior wall fan, resulting in incomplete knurl welds and micro-channel leaks.
Q: How does Paperjoy prevent slit edge wicking during maritime transport?
We use laser-sharpened circular shear knives to achieve clean, burr-free roll edges. Every reel is wrapped in high-density multi-layer waterproof stretch film, padded with protective end discs, and sealed on heavy-duty wooden pallets with desiccants to maintain an equilibrium moisture content of 6% ± 1%.
Q: What slitting width tolerances can Paperjoy provide for cup bottom reels?
Our CNC slitting machinery maintains strict reel width tolerances within ±0.5mm, with core diameters of 3 inches (76mm) or 6 inches (152mm). Precision rewinding ensures uniform web tension without telescoping or edge distortion during high-speed unwind operations.
Explore Our Full Range Of Paper Packaging Raw Materials
Direct factory sales, customized specifications, and comprehensive packaging raw material solutions.
Get Free Samples And Quotations Today!
Contact our technical engineering team for customized GSM combinations, roll width slitting, sample testing reels, and direct factory pricing.