R&D Innovation: Ultra-Tight Valve Sack – for packing fluid like powdersAbout Us

At Rosenflex, we are always looking to offer innovate packaging solutions for our customers. We like to work with manufacturing partners who focus on innovation and development, enabling us to keep one step ahead. The most recent improvement in design is the Ultra-Tight Valve Sack. This new development focuses on a problem we found in the industry, as companies kept contacting us asking for a solution for almost fluid like powders that were troublesome to pack. Customers complained current suppliers could not fix an issue with valve sacks that would leak and thus compromise the very fine powder.

To solve this, our R&D department designed the Ultra-Tight Valve Sack to ensure fluid like powders remained protected. The design uses new production methods, improved gluing techniques and enhanced patch technology to ensure the Valve Bag does not leak even the most fluid like powders.

Are you looking for Ultra-Tight Valve Sacks? Let us know and one of our specialists will be in touch to help: email: sales@rosenflex.com

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About Rosenflex and what we can offer to help you.

We are passionate about supplying our customers with the most effective and cost efficient solutions to their packaging requirements by establishing long term relationships, built on trust and confidence, and by developing a deep understanding of their specific needs.

We offer all our clients innovative and competitively priced packaging with good quality, performance led products allied to technical backup and high levels of customer service throughout our business.



Legislative requirements, certification, policies and approvals are important details that we like to cover for your peace of mind.  Copies of the current legislation, quality and safety guidance that we adhere to are available for you to read and download.


We find it fascinating to analyse our business regularly and to keep on top of current packaging trends.  You can take a look at our markets, our performance and some key facts and figures about our business too.

Letters From MD

To enable you to understand our business at a quick glance an annual letter is written outlining the main events for the year just gone. There will also be regular updates in the news section which we hope will continue to keep you abreast of other items and information of interest

Production Sites

With global packaging production facilities we need to have a strong logistics chain.

Our customers need an organised, efficient, on-time delivery. To ensure that we offer. . .
  • 2 UK warehouses and Ireland for rapid response.
  • A combination of products stocked, that can be picked and distributed quickly.
  • Lower inventory costs as we manage stock levels.
  • Cost-effective distribution.

History Timeline

We’ve raided our archives to bring you a selection of photos showing packaging down the years starting with paper in the 1920s, through to plastic in the 1960s and FIBCs in the 1970s right through to the present day. Join us in a trip down memory lane and see what life was like when flares were in fashion the first time around. . .


Ensuring that our customers meet their Corporate Social Responsibility and Sustainability targets is a subject close to our hearts. Our advice extends to providing alternative packaging solutions that help to protect our environment.

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