UV-Laser Etched Blister Lid for Recyclable Push-Through Packaging

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Solution Overview

Problem

Conventional blister packs are difficult to recycle due to the combination of different materials, and mechanical scoring methods compromise lid barrier properties and fail to provide uniform push-through force.

Innovation Solution

A UV laser is used to create engraving or etching on a rupturable substrate and blister layer made of the same or similar plastics, allowing for controlled push-through force and recyclability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Force

If mechanical scoring or perforation is used to weaken the lid, then push through force is reduced, but the lid's barrier properties are substantially impaired

Engineering Contradiction:

Improvepush through forceVSAvoidbarrier properties

Core Design Contradiction:

ForceVSReliability

Solution Approach 1:

The patent replaces mechanical scoring methods with UV laser-induced chemical etching. The UV laser creates micro-channels and modifies polymer chains through photo-oxidation and chain scission, achieving controlled weakening without mechanical contact that would compromise barrier integrity. This chemical/photonic approach substitutes the mechanical scoring system entirely.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent changes the physical-chemical parameters of the lid material through UV laser treatment. By controlling laser power, scanning speed, and pass number, the process creates controlled micro-structural changes (micro-channels, reduced crystallinity) that adjust the push-through force while preserving the overall barrier properties through precise parameter management.

Inventive Principle:

Principle #35Parameter changes

2Force

If conventional mechanical scoring is used, then push through force is reduced, but uniform push through force control is not achieved

Engineering Contradiction:

Improvepush through forceVSAvoiduniformity of push through force

Core Design Contradiction:

ForceVSManufacturing precision

Solution Approach 1:

The patent replaces imprecise mechanical scoring with UV laser processing that offers digital controllability. The laser system can precisely control etching depth, pattern density, and distribution through software parameters, achieving uniform push-through force across the entire lid surface that mechanical methods cannot consistently deliver.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent uses UV laser parameters (power, speed, hatch distance, number of passes) to precisely control the etching uniformity. By optimizing these parameters, the process creates consistent micro-structural changes across the lid, resulting in uniform push-through force distribution that mechanical scoring cannot achieve due to its inherent variability.

Inventive Principle:

Principle #35Parameter changes

3Reliability

If multicomponent materials (plastic laminates and aluminum foil) are used in blister packs, then packaging performance is improved, but recyclability becomes technically challenging and commercially prohibitive

Engineering Contradiction:

Improvepackaging performanceVSAvoidrecyclability

Core Design Contradiction:

ReliabilityVSEase of manufacture

Solution Approach 1:

The patent applies homogeneity by using the same plastic material for both the blister cavity and the lid, eliminating the need for material separation in recycling. This single-material construction maintains packaging performance while enabling straightforward recycling through conventional plastic recycling streams, directly addressing the recyclability challenge of multicomponent blister packs.

Inventive Principle:

Principle #33Homogeneity

Solution Approach 2:

The patent extracts the aluminum foil layer from the traditional blister pack construction, removing the problematic multicomponent structure. By eliminating the aluminum laminate and using only recyclable plastic materials for both the cavity and lid, the invention simplifies the material composition while maintaining packaging functionality, making the entire package recyclable.

Inventive Principle:

Principle #2Taking out (Extraction)

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 solution provides a recyclable blister package with uniform push-through force suitable for pharmaceutical packaging, ensuring child resistance and senior friendliness while maintaining barrier properties.

Implementation Method 1

The rupturable substrate may at least partially include a UV-laser formed engraving or etching that reduces push through force

Methodology Applied

Scientific EffectLaser ablation: Laser Ablation

Data Source

PatentUS12534281B2Push through blister package with UV laser produced engraving or etching and methods of making thereof

Publication Date: 2026.01.27 LIVEO RES AG

AI summary

Provided are a blister package and a method of making thereof. The blister package includes a rupturable substrate; and a blister layer overlayed by the substrate, thereby making a cavity between the rupturable substate and the blister layer. The rupturable substrate at least partially forms an engraving or etching that reduces push through force required for dispensing a product stored inside the cavity for customer dispensing. The rupturable substate and the blister layer are made of the same or same class plastic or polymer thereby making the blister package recyclable.