About
PP hollow sheet, also known as PP twin wall sheet, or PP fluted board, is a lightweight thermoplastic sheet produced through extrusion technology.
With its unique hollow rib structure, PP hollow sheet combines high stiffness, impact resistance, moisture resistance, chemical stability, and 100% recyclability. It has become an ideal alternative to traditional materials such as corrugated cardboard, plywood, and metal sheets in packaging, advertising, construction protection, and industrial applications.
Compared with solid plastic sheets, the hollow structure significantly reduces material consumption while maintaining excellent mechanical strength. This makes PP hollow sheets a sustainable solution for industries requiring lightweight and durable materials.
The manufacturing process of PP hollow sheets mainly includes extrusion, forming, cooling, surface treatment, and cutting.
The PP raw material is melted and plasticized by a high-efficiency extruder.
JWELL PP hollow sheet extrusion lines normally use:
The multi-layer extrusion technology allows manufacturers to produce sheets with different functions, such as:
This flexible structure helps customers reduce production costs while improving product performance.
The specially designed PP hollow sheet die controls the melt distribution and ensures:
The die can be customized for different sheet widths and structures according to customer requirements.
After leaving the die, the molten PP sheet enters the vacuum calibration table.
The calibration system provides:
The PP calibration table usually adopts water circulation cooling with precise temperature control to ensure stable production.
After initial cooling, the sheet enters the heating oven.
The purpose is to:
The temperature can be adjusted according to different PP materials and sheet thicknesses.
PP material has low surface energy, which makes printing and coating difficult.
The corona treatment device modifies the PP surface through electrical discharge, improving:
This process is especially important for packaging boxes, advertising boards, and printed PP sheets.
After surface treatment, the PP hollow sheet enters the cooling section and cutting system.
Depending on customer requirements, JWELL production lines can be equipped with:
The complete automation improves production efficiency and reduces labor costs.
Different structural designs provide different performance advantages.
The most common structure with two flat surfaces and internal ribs.
Advantages:
Applications:
Multiple hollow layers increase strength and insulation performance.
Advantages:
Applications:
Additional functional layers can be added during extrusion.
Examples:
Applications:
| Item | Specification |
|---|---|
| Material | PP / Recycled PP |
| Sheet Width | 1000-3000mm |
| Sheet Thickness | 2-12mm |
| Production Capacity | 300-600kg/h |
| Extrusion Type | Single Screw Extrusion |
| Structure | Twin Wall / Multi Wall |
| Automation | PLC Intelligent Control |
| Surface Treatment | Corona Treatment Optional |
(Parameters can be customized according to product requirements.)
PP hollow sheets are widely used for:
Compared with cardboard packaging, PP hollow sheets provide better moisture resistance and longer service life.
Applications include:
The lightweight structure makes installation easier while maintaining excellent impact resistance.
Because PP hollow sheets have excellent printing performance after corona treatment, they are commonly used for:
PP hollow sheets are used for:
Their chemical resistance and recyclability meet modern sustainable manufacturing requirements.
As a professional plastic extrusion equipment manufacturer, JWELL provides complete PP hollow sheet extrusion solutions with advanced technology and reliable performance.
Production efficiency can be significantly improved compared with traditional equipment.
The production line integrates:
It ensures:
JWELL PP hollow sheet lines support customized production:
One production line can meet multiple market demands.
The system adopts:
Helping customers achieve lower energy consumption and greener manufacturing.
PP hollow sheet extrusion technology provides a sustainable solution for producing lightweight, durable, and recyclable plastic sheets.
With advanced extrusion technology, precise forming systems, and intelligent automation, JWELL PP Hollow Sheet Production Line helps manufacturers produce high-quality PP twin wall sheets for global packaging, construction, advertising, and industrial markets.
Contact JWELL to develop your customized PP hollow sheet production solution.
JWELL Machinery brings over two decades of extrusion engineering expertise to PP Hollow Sheet Production Line. The Sheet & Board Division has delivered complete sheet extrusion lines to customers across 120+ countries, covering the full product portfolio—PET sheet, ABS sheet, PMMA sheet, PC corrugated and solid sheet, geomembrane, and Geocell and Geogrid Production line.
A PP hollow sheet production line is an extrusion system used to manufacture lightweight polypropylene hollow sheets, also known as PP corrugated sheets, PP twin wall sheets, or PP fluted boards.
The production line melts PP raw materials through an extruder, forms the hollow structure through a special die, then performs vacuum calibration, cooling, surface treatment, and cutting to produce finished sheets with high strength, low weight, and excellent recyclability.
PP hollow sheets are widely used in packaging, construction protection, advertising, automotive, and industrial applications.
Common products include:
Due to their waterproof, impact-resistant, and recyclable properties, PP hollow sheets are increasingly replacing traditional cardboard and wooden materials.
The main raw material is polypropylene (PP), including virgin PP resin and recycled PP materials.
JWELL PP hollow sheet extrusion lines can be designed for different material requirements, including:
The material selection depends on the final application and required performance.
The production capacity of a PP hollow sheet extrusion line depends on the extruder model, sheet width, thickness, and product structure.
A typical JWELL PP hollow sheet production line can achieve:
JWELL can customize the extrusion system according to customers' production requirements and investment plans.
JWELL PP hollow sheet production lines provide high efficiency, stable quality, and flexible production solutions.
Key advantages include:
With extensive experience in plastic extrusion equipment manufacturing, JWELL supports customers worldwide with complete PP hollow sheet production solutions.
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