Compressed Coir Pith Tablets for Absorbent Pet Litter
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Solution Overview
Problem
Current methods for producing compressed coconut coir pith for use as pet litter or absorbent materials result in products that become hydrophobic within a short period, losing their ability to absorb liquids, and the particle size reduction during pelletizing inhibits re-expansion properties, leading to a short shelf life of less than two weeks.
Innovation Solution
A method and apparatus for producing compressed coir pith tablets with a diameter of 7.5 mm and thickness of 3 mm, using a hydraulic press system that compresses coir pith without adding moisture, maintaining a moisture content below 15%, and utilizing a fixed die with 520 holes to create tablets that re-expand and absorb liquids effectively, maintaining absorbency for over 18 months.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If coir pith is compressed using conventional pelletizing methods, then production efficiency is improved, but the product becomes hydrophobic and loses absorbency within a short period
Solution Approach 1:
The patent changes the compression parameters by using a hydraulic press system that applies controlled pressure without adding moisture, maintaining moisture content below 15%. This parameter change prevents the coir pith from becoming hydrophobic while still achieving efficient compression into tablet form
Solution Approach 2:
The patent creates a composite structure by compressing coir pith particles into a tablet matrix that maintains the natural hydrophilic properties of coir while giving it a stable compressed form. The composite tablet structure prevents hydrophobicity development that occurs in conventional pelletized forms
2Ease of manufacture
If particle size is reduced during pelletizing, then manufacturing is simplified, but re-expansion properties are inhibited
Solution Approach 1:
The patent segments the coir pith into controlled particle sizes before compression, but unlike conventional pelletizing that过度 reduces particle size, this method maintains particles in a size range that allows both easy manufacturing and subsequent re-expansion. The segmented particles are compressed into tablets that can later re-expand effectively
Solution Approach 2:
The patent optimizes the particle size parameter to a specific range that balances manufacturing ease with re-expansion capability. The particles are not reduced too finely, preserving their ability to re-expand while still being processable through the compression system
3Ease of manufacture
If moisture is added during compression, then coir pith compressibility is improved, but shelf life is reduced to less than two weeks
Solution Approach 1:
The patent extracts the moisture addition step from the compression process entirely. By removing this step, the coir pith maintains its natural low moisture state during compression, which actually improves compressibility through the hydraulic press while preventing the hydrophobic degradation that would otherwise occur, extending shelf life to over 18 months
Solution Approach 2:
The patent changes the moisture content parameter to be maintained below 15% throughout the compression process, rather than adding moisture to improve compressibility. This parameter change, combined with hydraulic press technology, achieves effective compression without the negative consequences of moisture addition
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 compressed coir pith tablets retain their ability to absorb liquids for an extended period, with a shelf life of over 18 months, and do not become hydrophobic, providing a stable and effective absorbent solution for pet litter and other applications.
Implementation Method 1
a tablet press including a frame, the frame including a top plate with four openings formed therethrough adjacent to four corners of the top plate, a bottom plate with four openings formed therethrough adjacent to four corners of the bottom plate... a moveable punch with a top portion, a punch main plate backer and a punch main plate with a plurality of pins extending from a bottom surface
Implementation Method 2
The tablets being usable to absorb liquids... compressed coir pith tablets... that re-expand and absorb liquids effectively
Data Source
AI summary
Embodiments of the disclosed subject matter include a litter scoop that will work with a pelleted cat litters made from various substances such as wood shavings, bamboo, paper, coir, etc.