Laundry Detergent Sheet with Frangibility Lines for Variable Dosing
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Solution Overview
Problem
Commercially marketed laundry detergent sheets lack the ability to be easily divided into different sizes for varying laundry needs, such as larger doses for machine washing and smaller doses for hand washing or stain pretreatment, due to their uniform strip configuration.
Innovation Solution
A non-fibrous laundry detergent sheet with lines of frangibility that separate the sheet into sections of different sizes and shapes, allowing for customizable dosing, marked by size indicators or colors, and formed by indentation or perforation, enabling easy tearing into desired pieces.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If laundry detergent sheet is divided into uniform strips, then manufacturing simplicity is maintained, but flexibility for different dosing needs is lost
Solution Approach 1:
The laundry detergent sheet is divided into multiple sections of different sizes by introducing lines of frangibility. These lines create predetermined break points that allow the sheet to be separated into various dosage portions (e.g., full dose, half dose, quarter dose) while maintaining a simple overall sheet structure during manufacturing.
Solution Approach 2:
The lines of frangibility are pre-formed during manufacturing through indentation or perforation. This preliminary action creates ready-to-tear sections that enable consumers to easily obtain different dosages without requiring complex manufacturing processes or post-production modifications.
2Measurement precision
If laundry detergent sheet uses same-size strips, then ease of manufacture is maintained, but precision in dosage control is reduced
Solution Approach 1:
The sheet is segmented into sections with different surface areas corresponding to different dosage requirements. By controlling the dimensions of each section during manufacturing, precise dosages (e.g., 1/4, 1/2, 3/4 dose) are achieved through simple geometric divisions rather than complex measurement and cutting processes.
Solution Approach 2:
Different sections of the sheet are designed with different sizes and potentially different detergent compositions to meet specific dosing needs. This local differentiation allows precise dosage control while maintaining a straightforward manufacturing process that simply varies the dimensions or composition in specific local areas.
3Ease of operation
If laundry detergent sheet is made water-soluble, then ease of operation is improved, but structural integrity during handling is reduced
Solution Approach 1:
Lines of frangibility are pre-formed through indentation or perforation to create controlled weak points that allow easy tearing before the sheet contacts water. This preliminary structural modification enables users to separate sections dry, avoiding the problem of water-soluble sheets becoming too weak to handle.
Solution Approach 2:
The sheet is divided into separate sections that can be handled and torn independently along the lines of frangibility. This segmentation allows users to separate and handle smaller portions without the entire sheet becoming waterlogged and difficult to manage, maintaining operational ease while preserving sufficient strength during the handling phase.
Data Source
AI summary
A non-fibrous laundry detergent sheet includes at least one line of frangibility for separating the sheet into smaller sections with different sizes.