Clumping Hygiene Granulate with Multi-Layer Coating for Low Bulk Density
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing clumping hygiene granulates, such as cat litter, face challenges in achieving low bulk density while maintaining effective moisture absorption and retention, and preventing stickiness that could cause clumps to adhere to animal fur, especially with varying pH levels in cat urine.
Innovation Solution
A granulate structure featuring a porous, non-swelling carrier material with a multi-layer coating comprising finely divided bentonite, a hydrocolloid gel, and a calcium silicate hydrate-based outer jacket, which absorbs moisture to form clumps without excessive stickiness, utilizing a specific composition and production process to achieve low bulk density and high absorption capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If clump-forming materials like bentonite and hydrocolloids are used to form solid agglomerates, then clumping performance is improved, but bulk density increases and cost increases
Solution Approach 1:
The patent applies local quality by creating a multi-layer coating structure where different layers serve different functions: the first layer contains bentonite for clump formation, the second layer contains hydrocolloid for adhesion, and the third layer contains superabsorbent polymer for moisture management. This localized functional distribution allows each material to perform its optimal function while reducing overall bulk density compared to using only bentonite throughout.
Solution Approach 2:
The patent uses composite materials by combining multiple materials with different properties in a layered structure: bentonite (for clumping), hydrocolloid (for adhesion), and superabsorbent polymer (for moisture management). This composite approach allows the granules to achieve clumping performance while maintaining lower bulk density through the lightweight superabsorbent polymer layer.
2Reliability
If hydrocolloid is used to improve adhesion and clumping, then clumping performance is improved, but stickiness increases causing clumps to adhere to animal fur
Solution Approach 1:
The patent applies local quality by placing the hydrocolloid layer between the bentonite layer and the superabsorbent polymer layer, rather than on the outer surface. This positioning allows the hydrocolloid to provide adhesion for clump formation while the outer superabsorbent polymer layer provides a non-sticky surface that contacts the animal fur, thus eliminating the harmful stickiness effect.
Solution Approach 2:
The patent uses an intermediary approach by introducing the superabsorbent polymer layer as a mediator between the sticky hydrocolloid layer and the external environment (animal fur). This intermediary layer provides a non-sticky surface that prevents direct contact between the sticky hydrocolloid and the animal fur, thus eliminating the harmful effect while preserving the clumping function.
3Reliability
If pH-sensitive hydrocolloids are used to form clumps, then clumping is effective at pH 6, but at other pH values clumps become sticky and greasy
Solution Approach 1:
The patent applies local quality by creating distinct functional layers: the bentonite layer handles clumping formation, the hydrocolloid layer provides adhesion, and the superabsorbent polymer layer manages moisture and provides pH adaptability. This separation allows the hydrocolloid to function optimally at pH 6 while the superabsorbent polymer compensates for pH variations, maintaining non-sticky properties across different pH conditions.
Solution Approach 2:
The patent uses composite materials to achieve pH adaptability by combining bentonite, hydrocolloid, and superabsorbent polymer in a layered structure. The superabsorbent polymer layer acts as a buffer that maintains non-sticky properties across different pH conditions, while the bentonite and hydrocolloid layers provide clumping and adhesion functions respectively.
4Weight of stationary object
If lightweight non-swellable material like aerated concrete is used for core, then bulk density is reduced, but clumping capability is insufficient
Solution Approach 1:
The patent uses composite materials by combining lightweight non-swellable core material (aerated concrete or similar) with clump-forming materials (bentonite, hydrocolloid, and superabsorbent polymer) in a layered structure. This composite approach allows the core to provide low bulk density while the outer layers provide the necessary clumping capability, thus resolving the contradiction between lightweight and clumping performance.
Solution Approach 2:
The patent applies local quality by placing clump-forming materials in the outer layers rather than throughout the entire granule. The core remains lightweight and non-swellable for low bulk density, while the outer layers contain bentonite, hydrocolloid, and superabsorbent polymer to provide clumping capability where it is needed for moisture absorption and clump formation.
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 granulate exhibits excellent clumping properties with low bulk density, high water absorption, and improved abrasion resistance, preventing stickiness that could cause clumps to adhere to animal fur, while maintaining effective moisture management.
Implementation Method 1
finely divided bentonite 4 distributed on the grain surface 3
Implementation Method 2
a substance that swells and is adhesive when exposed to moisture
Implementation Method 3
an intermediate layer 5 encasing the carrier grain 2 with an intermediate layer surface 6, hydrocolloid gel 7 arranged on the intermediate layer surface 6
Implementation Method 4
a porous, mineral, non-swelling carrier material with an outer grain surface 3
Implementation Method 5
a porous, mineral, non-swelling carrier material
Data Source
Figure 1
Figure 2
AI summary
The invention relates to a clumping hygiene granulate, in particular animal bedding, wherein the hygiene granulate comprises a plurality of individual granules (1; 1a), each granule (1; 1a) comprising: a) at least one inner carrier granule (2) made of a porous, mineral, non-swelling carrier material, b) an intermediate layer (5) encasing the carrier granule (2) or carrier granules (2), which consists of a mixture containing at least a flour of a non-swelling, mineral, porous material, in particular calcium silicate hydrate flour, and a gel matrix (16) of at least cold-water-swelling, in particular cold-water-soluble, starch and a cold-water-swelling, in particular cold-water-soluble, hydrocolloid other than starch, c) bentonite flour (4) or superabsorbent arranged between the carrier granule (2) or carrier granules (2) and the intermediate layer (5).d) an outer shell layer (8) enclosing the intermediate layer (5) with a shell layer surface (9), wherein the outer shell layer (8) consists of a mixture containing at least a powder of a non-swelling, mineral, porous material, in particular calcium silicate hydrate powder, and bentonite powder, and e) a cold-water-swelling, in particular cold-water-soluble, hydrocolloid gel (7), in particular starch gel, arranged between the outer shell layer (8) and the intermediate layer (5), f) hydrocolloid grains (10) of a cold-water-swelling, in particular cold-water-soluble, hydrocolloid arranged distributed on the shell layer surface (9), and a process for its production.