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About us

4a manufacturing GmbH is the leading manufacturer of micro sandwich materials for lightweight and acoustic applications. For over ten years, our innovative, high-quality micro sandwich materials have already been in use in loudspeakers of mobile phones, tablets and laptops. 4a manufacturing's core competence lies in the production of high quality thin foam sheets - the same know-how that made us the technology leader in the areas "thin foams" and "micro sandwiches". Our experience in the fields of lightweight construction, composites and sandwich materials enable our development team to design innovative tailored solutions to serve individual customer needs. We strive to extend our lead in the areas of thin foams and micro sandwich materials through ongoing development of our products and processes according to the needs of our clients.

Our Values

4advanced customer orientation

The forceful alignment of our activities to our customer´s requests is our most important objective. Each of our employees understands and takes completely to heart the needs and objectives of our customers.

4advanced team spirit

Joy over the joint creation and recreation is incentive and motivation of our highly qualified team. Hence the talents of each individual employee are nurtured to do pioneering work in a successful team.

4advanced technologies

We consider ourselves a strongly technology- oriented company. By focusing on our core competences we create technological lead in methods and processes generating and safeguarding the competitive advantage of our customers.

4advanced High Quality Outcome & Success

From the initial idea to high volume production the economic success of our customer´s products is the epicentre of our quest. Product performance, process reliability and subsequently a high delivery quality are the foundation of our mutual success.


4a manufactures various composite materials and polymers. We offer the implementation of special manufacturing processes for plastics, metals, fibers and various combinations of these materials. Based on that we design special application oriented solutions for our customers.

Industries and Markets

We consciously diversify our efforts to serve different industry sectors. This strategy of industry and market diversification demands a high level of flexibility which will grow even further over the years to come.


We primarily concentrate on processes for medium size and larger unit output series. To guarantee reproducible high quality, we strive to install high levels of automation in all processes.


Our company is interested in new and innovative projects and partnerships. We offer a profound knowledge in material science, including characterization and simulation of multilayer composite materials.


Besides our focus on the development of new materials and processes our experience also allows to guarantee high quality and consistency in the production. 4a manufacturing is ISO9001 certified. Most of our products are compatible with RoHS directive.
You can download the certificate here.

Quality policy

The quality policy of the companies belonging to 4a Group derive from our concerted values.

The forceful alignment of our activities to our customer´s requests is our most important objective. A highly motivated, customer- oriented Team endowed with a high level of personal responsibility in an inspiring work environment develops and produces high-quality products generating a large customer benefit. Our dynamic organisational structure combined with the distinct decision-making authority of the individual employee make it possible to quickly and competently react to our customer´s wishes. Every employee has to understand and internalize the needs and objectives of our customers.

The use of our special technologies enables us to develop new and innovative products that secure our customer´s competitive advantage. Software- based feedback-systems and intelligent information networking guarantee efficient operations and continuing improvement of our processes.

The 4a technology group with its subsidiary companies is focused on lightweight construction and safety products. Environmental responsibility is the major subject of our actions and activities and is implemented in selected development projects and technologies for the benefit of our customers. The environmental awareness of our employees is regularly confirmed by appropriate active involvement in the company’s environmentally relevant processes. The use of resources is optimized according to the input-output principle with regard to its environmental impact.