Container Laminate With Removable Adhesive for Reclosable Sealing

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Solution Overview

Problem

Existing containers with plastic films used for closing are difficult to open and cannot be easily resealed, posing challenges in convenience and recyclability.

Innovation Solution

A laminate for container closing elements comprising a welding layer, a front layer, and an intermediate removable self-adhesive layer, where an incision creates an access window allowing the container to be opened and resealed multiple times, with a design that can be adapted to various container types and materials.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a plastic film is welded to close a container, then the container is sealed, but the container becomes difficult to open and cannot be easily reclosed

Engineering Contradiction:

Improvesealing capabilityVSAvoidopening and reclosing ease

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The welding layer is segmented into a welding portion and an opening portion through an incision. The welding portion remains attached to the container while the opening portion can be detached and reclosed using the self-adhesive layer, enabling both reliable sealing and ease of reclosing operations

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

A self-adhesive layer is introduced as an intermediary between the welding layer and the front layer. This adhesive layer enables the opening portion to be easily detached and reclosed multiple times while maintaining the sealing function, resolving the contradiction between reliable sealing and ease of operation

Inventive Principle:

Principle #24Intermediary (Mediator)

2Ease of operation

If an incision is made in the welding layer to enable opening, then the container can be opened easily, but the structural integrity of the closure is compromised

Engineering Contradiction:

Improveopening easeVSAvoidclosure structural integrity

Core Design Contradiction:

Ease of operationVSStrength

Solution Approach 1:

The welding layer is divided into a welding portion and an opening portion by the incision. The welding portion maintains structural integrity and remains firmly attached to the container, while the opening portion is designed to be detached and reclosed, thus preserving strength while enabling easy opening

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

Different portions of the welding layer are given different properties: the welding portion is designed for strong attachment and structural integrity, while the opening portion is designed for easy detachment and reclosing. This local differentiation resolves the contradiction between strength and ease of operation

Inventive Principle:

Principle #3Local quality

3Shape

If a laminate structure is used for the closing element, then the closure is rigid and planar, but the manufacturing process becomes more complex

Engineering Contradiction:

Improverigidity and planarity of closureVSAvoidmanufacturing process complexity

Core Design Contradiction:

ShapeVSDevice complexity

Solution Approach 1:

Multiple layers (welding layer, self-adhesive layer, and front layer) are combined into a single integrated laminate structure. This merging maintains the rigid and planar shape of the closure while the layers work together to provide the desired functionality, balancing shape requirements with manufacturing considerations

Inventive Principle:

Principle #5Merging (Combining)

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

Enables easy opening and reclosing of containers multiple times while maintaining a rigid and planar closure, ensuring recyclability and compatibility with diverse container materials and shapes.

Implementation Method 1

coupling said welding layer to said front layer through an intermediate layer of removable self-adhesive spread onto at least one adhesion portion of mutually coupled surfaces of said welding layer and of said front layer

Methodology Applied

Scientific EffectAdhesion: Adhesive

Data Source

PatentUS10414569B2Method for producing a laminate for making closing elements for containers or receptacles, laminate and container

Publication Date: 2019.09.17 SMILESYS SPA

AI summary

A container including a containment wall, defining an internal containment volume and including a free edge, a closing element including a welding layer welded onto the free edge of the wall and a front layer defining an outer surface of the container. An intermediate layer of removable self-adhesive is spread onto an adhesion portion of mutually coupled surfaces of the welding layer and front layer. An opening line adapted to define an access window is obtained through an incision in a stretch of thickness of the welding layer splitting the welding layer into a welding portion adapted to be welded to the container and an opening portion corresponding to the access window, with reference to an assembled configuration on the container. The incision is made to allow the detachment of the opening portion from the welding portion while the closing element is opened.