3D Fluff Pulp Molding With Reduced Drying Energy
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Solution Overview
Problem
Existing methods for manufacturing 3-dimensional shaped products from moulded pulp materials are energy-intensive and have a significant carbon footprint due to the need for extensive drying processes.
Innovation Solution
A method utilizing fluff pulp material, preferably comprising long fibre softwoods, with reduced water usage and additives like biodegradable biopolymers (e.g., PBS) and microfibrillated cellulose (MFC), combined with air-laid and spun-laid processing, to create products with in-mould heat treatments and optional post-moulding treatments, reducing the need for drying and enhancing product strength and sustainability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional moulded pulp products are manufactured using water as carrier and extensive drying processes, then the products achieve sufficient strength and stability, but the energy consumption and carbon footprint increase significantly
Solution Approach 1:
The invention changes the physical-chemical parameters of the pulp material by pre-treating it to reduce moisture content before forming, and by adjusting the composition to include binders and additives that enable strength development without extensive drying. This allows the product to achieve sufficient strength with reduced energy input for drying operations.
Solution Approach 2:
The invention applies preliminary action by pre-treating the fluff pulp material before forming - specifically, pre-drying or conditioning the pulp to reduce its moisture content beforehand. This preliminary preparation reduces the amount of energy required during subsequent drying operations while still achieving the necessary product strength.
2Ease of manufacture
If conventional moulded pulp products use water as carrier in the manufacturing process, then the forming process is simplified, but the amount of water and energy required for drying increases
Solution Approach 1:
The invention extracts or removes water from the pulp material before the forming process through pre-treatment operations. By removing excess water beforehand, the manufacturing process eliminates or reduces the need for extensive drying operations while still allowing the pulp to be formed effectively, thus reducing both water usage and energy consumption.
3Productivity
If fluff pulp material is pre-treated to reduce water content before air-laid flow, then the manufacturing efficiency increases and energy consumption decreases, but the process complexity increases
Solution Approach 1:
The invention merges multiple process functions into integrated units - combining the pre-treatment, forming, and curing operations into a coordinated sequence where the pre-treated pulp is fed directly to the mould in a controlled manner. This integration improves manufacturing efficiency by eliminating separate drying steps while managing process complexity through coordinated operation of combined units.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method significantly reduces energy consumption and carbon footprint while improving manufacturing efficiency and product strength, enabling biodegradability and enhanced barrier properties, suitable for food packaging applications.
Implementation Method 1
Forming may include additional heat treatments to activate and cure one or more of the additives that may be provided to the fluff pulp. This provides the end-product with sufficient strength and stability for its purposes.
Implementation Method 2
providing a fluff pulp material to a mould to form a 3-dimensional shaped product
Data Source
Figure 1
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AI summary
The present invention relates to a method for manufacturing a 3-dimensional shaped product from a fluff pulp material and such product. The method according to the invention comprises the steps of: providing a fluff pulp material; providing an air-laid flow of fluff pulp material to a 3-dimensional shaped mould; forming the product in the mould; and releasing the 3-dimensional shaped product from the mould.