Composite Material Laminating Agent Mixture
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Solution Overview
Problem
Conventional adhesives used in food packaging are too stiff, making packaging materials inflexible and difficult to adjust for desired flexural rigidity, and alternatives to synthetic waxes are needed to address consumer concerns and material compatibility issues.
Innovation Solution
A mixture of a hardening adhesive and a non-hardening adhesive is used as a laminating agent, allowing for adjustable bending stiffness by varying the mixing ratio, enabling more flexible and diverse composite material production while reducing material usage and costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Strength
If conventional adhesives are used as laminating agents, then bonding strength is achieved, but the composite material becomes too stiff and loses flexibility
Solution Approach 1:
The patent combines a hardening adhesive and a non-hardening adhesive in a laminating agent mixture. The hardening adhesive provides bonding strength while the non-hardening adhesive maintains flexibility, resolving the contradiction between strength and flexibility by merging two adhesive types with complementary properties.
Solution Approach 2:
The patent changes the chemical and physical parameters of the laminating agent by using a mixture of adhesives with different hardening characteristics. This parameter change allows the composite material to achieve both bonding strength and flexibility simultaneously, rather than being constrained to single-property adhesives.
2Reliability
If synthetic waxes are used as laminating agents, then food safety requirements are met, but consumer perception of taste and olfactory quality deteriorates
Solution Approach 1:
The patent replaces synthetic waxes with adhesive-based laminating agents that can be applied in thinner layers. These adhesives provide the necessary food contact safety without the refining residues present in synthetic waxes, thereby eliminating taste and olfactory impairment while maintaining food safety compliance.
3Strength
If hardening adhesives are used, then final bonding properties are achieved, but the adhesive cannot be reused and material efficiency decreases
Solution Approach 1:
The patent creates a dynamic laminating system where the hardening adhesive provides initial bonding that can be adjusted and modified. The combination with non-hardening adhesive allows for controlled hardening behavior, enabling partial reusability and adjustment during the lamination process, thereby reducing adhesive waste.
4Strength
If adhesive layer thickness is increased to improve bonding, then adhesion strength increases, but bending stiffness increases and flexibility is reduced
Solution Approach 1:
The patent changes the compositional parameters of the laminating agent by formulating a mixture where non-hardening adhesive content can be adjusted. This allows achieving adequate adhesion strength with thinner effective adhesive layers, as the non-hardening component provides flexibility and tack without requiring thick applications, thus maintaining bending flexibility.
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 composite material's flexural rigidity can be precisely adjusted within a wide range, enhancing packaging material flexibility and ecological sustainability, and enabling the use of previously unsuitable adhesives, ensuring food safety and consumer satisfaction.
Implementation Method 1
Curing adhesives are physically or chemically setting adhesives. Curing adhesives therefore react after application either by radiation, such as UV light, normal light, etc., temperature or moisture, which can also be absorbed through the air, by evaporation of an aqueous phase (water, solvent), or in another way, for example through a chemical reaction
Implementation Method 2
a first adhesive layer and a second adhesive layer, both being adjacent to one another and each being adhesive to at least one of the first layer and the second layer
Implementation Method 3
the adhesive reaches its final properties, such as strength, bonding (adhesion, cohesion), stiffness
Data Source
Figure 1
AI summary
The aim of the invention is being able to set the flexural stiffness of a composite material having at least two layers (2, 3) joined by means of a laminating agent. This aim is achieved in that a mixture of a first, curing glue and a second, non-curing glue is used as a laminating agent, wherein the flexural stiffness (B) of the composite material (1) is set by means of the mixture ratio (M) of the two glues.