Molded Pulp Container Fused Junction for Stronger Eco Packaging
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional petroleum-based plastic containers face challenges in cost, performance, and environmental impact, with bioplastics not being truly biodegradable, and existing solutions for pulp containers lack effective methods for joining components efficiently.
Innovation Solution
The method involves creating part shells from wood product, paper, or molded pulp, laminating them with a polymer film, and using ultrasonic welding to form a fused junction, utilizing thermoplastic or bioplastic materials and specific frequency and pressure settings for efficient bonding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If conventional petroleum-based plastic containers are made thinner to reduce cost, then manufacturing cost is reduced, but static load and compressive strength are compromised
Solution Approach 1:
The patent applies composite materials by combining molded pulp with bioplastic components to create a container that achieves required strength and performance attributes. The composite structure allows the container to maintain mechanical integrity while using sustainable materials, resolving the contradiction between cost reduction and strength maintenance.
2Strength
If petroleum-based plastics are used to ensure container strength, then mechanical performance is maintained, but environmental impact and carbon footprint increase
Solution Approach 1:
The patent applies parameter changes by transitioning from petroleum-based plastics to pulp and bioplastic materials. This material substitution changes the environmental parameters of the container while maintaining mechanical performance through the composite structure, thereby reducing carbon footprint and improving biodegradability without sacrificing strength.
3Object-affected harmful factors
If bioplastics are used to reduce environmental impact, then sustainability is improved, but true biodegradability is not achieved
Solution Approach 1:
The patent applies segmentation by dividing the container into distinct molded pulp body and bioplastic components (such as neck or closure). This segmentation allows the pulp portion to biodegrade while the bioplastic components can be separated and recycled, achieving both biodegradability and recyclability goals that neither material could achieve alone.
4Strength
If pulp containers are made with multiple components to improve performance, then functional attributes are enhanced, but manufacturing complexity increases
Solution Approach 1:
The patent applies the intermediary principle by using fusion technology to join the molded pulp body with bioplastic components. This fusion process creates a integrated structure that combines the advantages of both materials while simplifying the manufacturing process, as the components are bonded together in a single operation rather than requiring separate assembly steps.
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
This approach reduces plastic usage, enhances container strength and performance, and promotes sustainability by creating a durable, biodegradable container with a strong, fused junction.
Implementation Method 1
Ultrasonic welding is a process that uses ultrasonic vibration to generate heat in materials to be joined
Implementation Method 2
The mechanical energy is converted to heat by friction between the two pieces being welded
Data Source
Figure 1A
Figure 1B
Figure 1C
AI summary
Molded pulp containers with fused junctions and methods of making of same are provided. The present invention provides a pulp container, comprising a molded pulp body, wherein the body comprising a bottom and at least one side wall forming a cavity, wherein the at least one side wall comprising a upper rim, a neck, wherein the neck comprising a upper closure part and a lower rim, a fused junction, wherein a part of the upper rim of the at least one sidewall of the body and a part of the lower rim of the neck are aligned and fused together. The fused junction may be formed by ultrasonic welding.