Inner-Surface Printing on Water-Soluble Packaging
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Solution Overview
Problem
Water-soluble packaging for liquid detergents or cleaning agents often suffer from turbidity due to low solubility of additives like carboxymethyl cellulose and require expensive thickeners/dispersants for aesthetic and scent distribution, while printed images on such packaging are prone to smudging or mechanical damage.
Innovation Solution
A method involving a partially colored water-soluble film packaging with polyvinyl alcohol or its copolymers, using pigments or pearlescent agents for printing on the inner surface to create a durable and aesthetically pleasing image, and incorporating multiple chambers for different agent compositions, utilizing suitable film materials and printing technologies like inkjet or piezo direct printing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If carboxymethyl cellulose is incorporated into liquid detergents to prevent redeposition, then washing performance is improved, but turbidity occurs due to low solubility
Solution Approach 1:
The patent extracts the problematic carboxymethyl cellulose from the liquid detergent formulation and instead incorporates it into the water-soluble packaging material. This separation removes the source of turbidity from the liquid product while preserving the anti-redeposition function in the packaging structure.
Solution Approach 2:
The water-soluble packaging acts as an intermediary carrier that contains the carboxnymethyl cellulose. When the packaging dissolves in water, it releases the additive gradually, providing the desired washing performance without causing immediate turbidity in the liquid detergent.
2Object-generated harmful factors
If thickeners and dispersants are added to achieve homogeneous perfume distribution, then aesthetic appearance is improved, but production cost increases
Solution Approach 1:
The patent removes expensive thickeners and dispersants from the liquid detergent formulation by incorporating perfume capsules directly into the water-soluble packaging structure. This eliminates the need for additional chemical additives while achieving homogeneous scent distribution through the packaging's dissolution.
Solution Approach 2:
The patent applies perfume capsules locally within the water-soluble packaging chambers, creating concentrated scent zones that dissolve uniformly. This localized approach achieves aesthetic homogeneity without requiring expensive bulk thickeners or dispersants throughout the entire detergent formulation.
3Loss of information
If printed images are applied to the outer surface of water-soluble packaging, then labeling is achieved, but images are prone to smudging and mechanical damage
Solution Approach 1:
The patent inverts the conventional printing approach by printing on the inner surface of the water-soluble packaging instead of the outer surface. This reversal protects the printed images from external mechanical damage and smudging, as they are now shielded within the packaging structure until dissolution.
Solution Approach 2:
The water-soluble packaging film serves as a protective shell that encloses and protects the printed images on its inner surface. This thin film structure provides mechanical protection against smudging and damage while remaining soluble, allowing the images to be revealed intact when the packaging dissolves.
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 method produces a stable, aesthetically appealing, and functional water-soluble packaging with a durable printed image and adaptable form, ensuring effective distribution of additives and maintaining the structural integrity of the packaging.
Implementation Method 1
The coloring substance is applied to the inner surface of the water-soluble cover by means of printing
Implementation Method 2
a water-soluble packaging which contains a liquid detergent or cleaning agent and a water-soluble casing
Data Source
AI summary
The invention relates to a water-soluble packaging (1), which contains an agent and a water-soluble casing, wherein the water-soluble casing is at least partially dyed using a coloring substance.