Water-Soluble Cellulose Ether Sieve Coating
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional methods for producing water-soluble cellulose ether face inefficiencies due to entanglement of fibrous particles during sieving, leading to reduced yield and pass-through efficiency, particularly when using complex and specialized sieving machines.
Innovation Solution
A method involving the use of a sieve with a surface coated with an inorganic metal compound to prevent entanglement and layered growth of fibrous particles, allowing for efficient sieving and production of water-soluble cellulose ether with improved flowability without the need for specialized equipment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional sieving methods are used without special apparatus, then the process is simple, but fibrous particles entangle and form cotton-like substances on the sieve surface, reducing pass-through efficiency and yield
Solution Approach 1:
The patent introduces an intermediary substance (water or alcohol) to spray onto the sieve surface during the sieving process. This intermediary prevents fibrous particles from directly contacting and entangling on the sieve mesh, thereby maintaining high pass-through efficiency while using simple conventional sieving apparatus without requiring special complex machines
2Productivity
If vibration or rocking motion is applied during sieving to prevent entanglement, then pass-through efficiency improves, but the sieving machine structure becomes complex and complicated
Solution Approach 1:
Instead of using complex vibration or rocking mechanisms, the patent employs a simple spray system that delivers water or alcohol onto the sieve surface. This intermediary approach prevents particle entanglement through lubrication and separation effects, achieving high productivity while maintaining the sieving machine structure as simple and conventional
Solution Approach 2:
The patent utilizes hydraulic spraying (using liquid water or alcohol) to deliver the intermediary substance onto the sieve surface. This pneumatic-hydraulic approach provides an simple yet effective mechanism to prevent particle entanglement without requiring complex mechanical vibration or rocking systems
3Productivity
If air jet flush is applied to the back surface of the sieve to remove circulating fraction, then yield improves, but the sieving machine structure becomes more complex
Solution Approach 1:
The patent employs pneumatic air jet flushing from the back surface of the sieve to remove circulating fraction and cotton-like substances. This simple pneumatic mechanism significantly improves yield by preventing material buildup and maintaining sieve openness, while adding minimal structural complexity to the conventional sieving apparatus
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
This approach enables the production of water-soluble cellulose ether with enhanced flowability and high yield, reducing the number of undissolved fibers and eliminating the need for complex sieving machines, thus simplifying the process and improving product quality.
Implementation Method 1
a sieve whose surface is coated with an inorganic metal compound can suppress entanglement of fibrous particles on the sieve surface and layered growth on the mesh of the sieve
Data Source
AI summary
There are provided a method for efficiently producing a water-soluble cellulose ether without using a special apparatus, and a novel water-soluble cellulose ether. More specifically, there are provided a method for producing a water-soluble cellulose ether including a first pulverization step of pulverizing a starting water-soluble cellulose ether to obtain a first pulverization product, and a first sieving step of sieving the first pulverization product by using a first sieve whose mesh surface is coated with an inorganic metal compound to obtain a first-sieve-passed water-soluble cellulose ether fraction; and a novel water-soluble cellulose ether.