Recyclable Packaging With Triple-Point Strips for Hermetic Sealing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods struggle to produce recyclable packaging that achieves reliable hermetic sealing, particularly at the triple point area, using sustainable materials without compromising recyclability or requiring extensive machine modifications.
Innovation Solution
A method involving a flat sheet made of recyclable material is folded into a tube with overlapping side edge sections, heat-sealed to form longitudinal and traverse joints, and equipped with a sealing strip at triple point sections to ensure reliable sealing, using a heat-sealable material like polypropylene or polyethylene.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If recyclable materials (paper, biodegradable polymers, recyclable laminates) are used to reduce ecological impact, then environmental sustainability is improved, but hermetic sealing reliability deteriorates
Solution Approach 1:
The patent uses recyclable laminate materials comprising multiple layers with different properties - a paper or biodegradable polymer base layer combined with a thermoplastic sealant layer. This composite structure allows the packaging to maintain recyclability while achieving reliable hermetic sealing through the thermoplastic layer's sealing capabilities.
Solution Approach 2:
The patent modifies the physical and chemical parameters of recyclable materials by applying thermoplastic sealant layers that can be activated at specific temperatures. This allows the materials to transition from a non-sealing state to a hermetically sealed state during the sealing process, achieving reliable sealing while maintaining the base material's recyclability.
2Reliability
If VFFS or HFFS processes are used to produce hermetically sealed packaging, then sealing reliability is improved, but triple point area leakage increases
Solution Approach 1:
The patent applies thermoplastic sealant layers specifically at critical sealing locations, particularly at the triple point areas where longitudinal and transverse seals intersect. This localized application of enhanced sealing material addresses the specific leakage problem at triple points without requiring modification of the entire packaging structure.
Solution Approach 2:
The thermoplastic sealant layers are pre-applied to the packaging material before the sealing process. This preliminary preparation ensures that when the sealing process occurs, the sealant material is already in position and ready to flow and fill gaps at the triple point areas, preventing leakage from the outset.
3Strength
If sustainable materials with higher stiffness and thickness are used, then material durability is improved, but heat distribution uniformity during sealing deteriorates
Solution Approach 1:
The patent creates a composite structure where a stiff, durable base layer (paper or biodegradable polymer) is combined with a thin thermoplastic sealant layer. The thermoplastic layer acts as a heat transfer medium that distributes heat uniformly during sealing, compensating for the poor thermal conductivity of the thicker, stiffer base material while maintaining its durability benefits.
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 provides hermetically sealed packaging that can be recycled easily, maintains sealing integrity, and can be produced on existing machinery with minimal modifications, ensuring consistent sealing quality and reduced material consumption.
Implementation Method 1
the sealant material and the sealing layer are heat sealed to one another
Implementation Method 2
heat sealing sections of the tube to enclose the substance inside the packaging
Data Source
AI summary
The invention relates to a method for producing a packaging (100) for enclosing a substance (S). A flat sheet (110) made of recyclable material and having two opposite side edge sections (111, 112) is provided and formed into a tube (130) by folding the flat sheet (110) so that the two side edge sections (111, 112) overlap each other at an overlapping section (139). The tube (130) is heat sealed along the overlapping section (139) to form a longitudinal sealing joint (131) and heat sealed across the longitudinal sealing joint (131) to close the tube (130) with a first traverse sealing joint (134) at a first tube end (132). The tube (130) is filled with the substance (S) and heat sealed across the longitudinal sealing joint (131) to close the tube (130) with a second traverse sealing joint (135) at a second tube end (133). A sealing strip (700) that is heat-sealable is provided. A first and second segment (701, 702) of the sealing strip (700) is provided at a first and a second triple point section (171, 172), where the longitudinal sealing joint (131) and the respective traverse sealing joints (134, 135) intersect, respectively. The segments (701, 702) of the sealing strip (700) seal the respective triple point section (171, 172) upon heat sealing of the respective tube end (132, 133) to form the respective traverse sealing joint (134, 135). The invention also relates to a packaging (100) enclosing a substance (S) and a machine (500) for producing the packaging (100).