PPWR Series — Article 5 of 5

The Blister-to-Flexible Transition Roadmap: 4 Phases, 0 Production Downtime

By DolcePack · Published July 2026 · 10 min read
Series: The PPWR Transition Guide for Industrial Packaging

The question spare parts manufacturers ask most often is not whether to transition from blister to flexible packaging — PPWR has answered that. The question is how to do it without disrupting production, without a gap in supply to distribution partners, and without committing to a line before understanding exactly what it will cost and what it will deliver. This is the complete transition roadmap.

A blister-to-flexible transition is not a single event. It is a structured project with four distinct phases, each with specific deliverables, specific decision points, and specific risks that must be managed. Understanding the full project structure before committing to it is the difference between a transition that goes smoothly and one that creates production disruption, cost overruns, and commercial risk with distribution partners.

The Ariete / Sandro Mentasti Srl transition — from a fully manual blister operation to an automated premade doypack line running 14–16 pouches per minute — was completed in four phases over approximately six months. There was no production downtime. The blister operation continued running throughout the transition, and the flexible line was brought online incrementally, with the blister operation wound down as the flexible line reached full operational stability.

Phase 1: Line Audit and SKU Analysis

The transition begins with a thorough audit of the current packaging operation. This is not a sales visit. It is a structured technical assessment that produces a clear picture of the current state — what is being packaged, in what quantities, in what formats, with what labour requirements — and a clear specification for what the new line needs to deliver.

The SKU analysis is the most critical element of Phase 1. Every SKU in the product range is assessed for its dimensions, its weight, its fragility, its count requirements, and its current packaging format. This analysis drives every subsequent design decision — the feeder configuration, the tooling design, the vision system calibration, the pouch format selection, and the changeover procedure. A line designed without a thorough SKU analysis will encounter problems during commissioning that could have been identified and resolved during the design phase.

Phase 1 typically takes two to four weeks and produces a detailed line specification document that serves as the basis for the investment proposal. The line audit itself — the initial assessment visit — is offered by DolcePack at no cost and with no commitment required.

Phase 2: Line Design and Tooling Engineering

With the SKU analysis complete and the line specification agreed, Phase 2 is the engineering phase. The machine configuration is finalised, the bespoke tooling is designed and manufactured, the vision system is specified, and the print module integration is planned. This phase is where the specific characteristics of the product range are translated into mechanical and software design decisions.

The tooling engineering phase is the longest element of Phase 2. Bespoke tooling for variable-dimension spare parts requires design, prototyping, testing with actual product samples, and refinement before the final tooling is manufactured. This process typically takes four to eight weeks, depending on the complexity of the product range and the number of distinct tooling configurations required.

Phase 2 also includes the pouch specification and supplier qualification process. The flexible pouches used on the line must be specified to match the machine’s sealing parameters and the product’s protection requirements, and a qualified pouch supplier must be identified and approved. For PPWR compliance, the pouch film specification must achieve grade A or B recyclability — which means mono-material PE or PP film, not multi-layer laminates that cannot be separated in standard recycling streams.

Phase 3: Installation and Commissioning

Phase 3 is the installation and commissioning phase. The machine is delivered, installed, and connected to utilities. The bespoke tooling is fitted and calibrated. The vision system is set up and calibrated for each SKU in the product range. The print module is integrated and tested. The line is run through a commissioning sequence using production-representative products and pouches.

The commissioning sequence is not a single run. It is a structured process that validates each element of the line individually before validating the complete integrated system. Feed reliability is validated first, then counting accuracy, then sealing integrity, then print quality, then the complete line at operating speed. Each validation step produces documented results that form part of the line’s quality record.

Phase 4: Post-Commissioning and Handover

Phase 4 is the most important phase for the long-term success of the transition, and it is the phase that is most often underestimated. Post-commissioning is the period during which the line is run under real production conditions — with real products, real pouches, real operators, and real production schedules — and any issues that emerge are identified and resolved with the line integrator still present and engaged.

The goal of Phase 4 is not just to resolve any remaining technical issues. It is to ensure that the manufacturer’s operating team is fully autonomous — that they understand the line, can operate it confidently, can perform routine maintenance, can diagnose and resolve common issues without external support, and can train new operators as required. Handover is complete when the operating team is genuinely independent, not when the integrator has completed their contracted deliverables.

Phase 4 also includes the production of complete quality documentation — operating procedures, maintenance schedules, changeover procedures for each SKU, vision system calibration records, and the PPWR compliance documentation required for the Declaration of Conformity. This documentation is not an administrative formality. It is the foundation of the manufacturer’s ongoing compliance posture and their ability to demonstrate compliance to distribution partners and regulatory authorities.

Managing the Transition Without Production Risk

The key to completing a blister-to-flexible transition without production risk is sequencing. The blister operation should continue running throughout Phases 1, 2, and 3. The flexible line should be brought online in Phase 3 as an additional capacity, not as a replacement for the blister operation. Only when the flexible line has been validated at full production speed and the operating team is confident in running it should the blister operation begin to be wound down.

This sequencing requires planning the transition timeline against the production schedule — identifying the periods when the blister operation can absorb the temporary reduction in capacity that occurs during the flexible line’s commissioning phase, and building sufficient stock buffer to cover any gap between the blister operation winding down and the flexible line reaching full output. For most manufacturers, this buffer period is two to four weeks — manageable with advance planning, but problematic if the transition is started too late.

With the August 2026 PPWR deadline now arrived, the window for a managed transition — one that maintains production continuity and avoids commercial risk with distribution partners — is extremely tight. The question is not whether to transition, but how quickly a transition can be initiated and how the interim period is managed.