Pet Absorbent Sheet Unevenness Pulp Polymer Ratio
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Solution Overview
Problem
Pet-use absorbent sheets fail to quickly absorb and diffuse urine, leading to wet paws and potential dirt spread in indoor environments, and are typically disposable after a single use, which is inefficient and wasteful.
Innovation Solution
A pet-use absorbent sheet with a liquid-permeable top layer, a liquid-impermeable backside layer, and an absorption member containing pulp and water-absorbent polymer materials, where the ratio of water-absorbent polymer to pulp is less than 1, and an unevenness part to facilitate wider liquid diffusion, allowing for multiple uses without wetback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a high ratio of water-absorbent polymer material to pulp material is used in the absorption member, then the urine absorption rate increases, but the liquid diffusion range decreases and wetback occurs after multiple uses
Solution Approach 1:
The patent optimizes the weight ratio parameter of water-absorbent polymer material to pulp material in the absorption member to be 0.03 to 0.3, which balances absorption speed and diffusion range. This parameter adjustment prevents excessive water absorption that would cause wetback while maintaining efficient urine absorption rate.
Solution Approach 2:
The absorption member uses a composite structure combining pulp material and water-absorbent polymer material in a specific ratio. The pulp material provides capillary action for wide liquid diffusion, while the water-absorbent polymer material provides rapid absorption. This composite approach resolves the contradiction between absorption rate and diffusion range.
2Reliability
If the absorbent sheet is designed for single use, then urine absorption performance is sufficient, but resource waste increases and cost efficiency decreases
Solution Approach 1:
The patent incorporates an unevenness part in advance within the absorption member structure. This preliminary structural design enables the absorption member to maintain its liquid diffusion capability after multiple absorption cycles, allowing the sheet to be reused several times while maintaining reliable urine absorption performance.
Solution Approach 2:
The absorption member is designed to maintain continuous absorption and diffusion functionality across multiple uses. The unevenness part ensures that liquid can continuously diffuse through the absorption member without forming wet spots that would prevent further absorption, enabling repeated use and reducing resource waste.
3Ease of operation
If the top side layer absorbs and retains moisture, then the pet feels comfortable, but the pet's soles get wet and dirt spreads in the room
Solution Approach 1:
The patent divides the absorption member into different functional zones using the unevenness part structure. The recess portions and protrusion portions create distinct absorption and diffusion zones, ensuring that liquid is rapidly drawn into the absorption member and diffused internally, preventing moisture from reaching the top side layer surface where the pet walks.
Solution Approach 2:
The absorption member is designed to rapidly skip through the liquid absorption process, quickly drawing urine away from the top side layer and diffusing it deep within the absorption member structure. This rapid liquid transfer prevents moisture accumulation on the surface that would cause wet paws and subsequent dirt spread.
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 sheet effectively suppresses paw wetting, maintains a dry texture, and allows for multiple uses, reducing waste and odor spread, with enhanced liquid diffusion and reduced wetback compared to conventional products.
Implementation Method 1
an absorption member arranged between the top side layer and the backside layer and configured to absorb a liquid that has permeated through the top side layer
Implementation Method 2
the unevenness part is formed to the portion where the top side layer and the tissue layer cover the absorption member. Accordingly, even after multiple times of liquid absorption, the liquid is diffused wider over the absorption member
Implementation Method 3
the absorption member contains a pulp material and a water-absorbent polymer material
Data Source
AI summary
A pet-use absorbent sheet according to the present invention includes: a liquid-permeable top side layer; a liquid-impermeable backside layer; an absorption member arranged between the top side layer and the backside layer and configured to absorb a liquid that permeated through the top side layer; and a tissue layer arranged between the top side layer and the absorption member. An unevenness part is formed to a portion where the tissue layer covers the absorption member, the absorption member contains a pulp material and a water-absorbent polymer material, and the ratio of the weight of the water-absorbent polymer material to the weight of the pulp material in the absorption member is less than 1.