what-is-material-compatibility-wbstb
what-is-material-compatibility-wbstb

Understanding material compatibility is a vital part of making sure your medical devices have a long functional life. Everything from choice of plastic to selection of disinfectant plays an important role.

Surface + formulation = compatibility

Disinfecting surfaces is a cornerstone of good infection prevention.

That means surfaces in healthcare settings are frequently exposed to healthcare-grade disinfectants. If the materials they're made from are incompatible with these disinfectants, it can lead to premature failure.

Surface material and disinfectant formulation are two of the most important factors affecting material compatibility.

Surface-compatibility
Surfaces-split-screen

Surfaces

'Plastics' and 'polymers' are umbrella terms for hundreds of different chemical structures. Device manufacturers choose raw materials based on physical properties (differing strength, flexibility or thermal resistance), commercial availability or cost of production. Materials used in healthcare must consider an additional factor: resistance to disinfectants.

Surfaces

'Plastics' and 'polymers' are umbrella terms for hundreds of different chemical structures. Device manufacturers choose raw materials based on physical properties (differing strength, flexibility or thermal resistance), commercial availability or cost of production. Materials used in healthcare must consider an additional factor: resistance to disinfectants.

Arrow-test

How does it work?

Healthcare equipment must be disinfected regularly for patient safety. Manufacturers should select materials able to withstand repeated exposure to disinfectants.

Formulation

Formulation

Disinfectant products contain a 'formulation.' This is a mix of biocides (active ingredients that kill microbes), solvents and other additives (improving anything from stability to odour). Each one of these ingredients must be carefully selected to balance antimicrobial efficacy with material compatibility. If not, this can lead to 'environmental stress cracking'.

Formulation

Disinfectant products contain a 'formulation.' This is a mix of biocides (active ingredients that kill microbes), solvents and other additives (improving anything from stability to odour). Each one of these ingredients must be carefully selected to balance antimicrobial efficacy with material compatibility. If not, this can lead to 'environmental stress cracking'.

The problem

Environmental stress cracking is the premature cracking and embrittlement of plastic through two simultaneous actions: stress and contact with specific fluids. In cases of material incompatibility, active ingredients, solvents and additives found in disinfectants diffuse into the surface of plastic.

Image-1

Exposure of susceptible materials to incompatible disinfectants causes the structure of polymers to change and detangle. This makes the plastic weaker and it becomes prematurely brittle.

When combined with stress, fine cracks form. Each formulation has varying compatibility with different surfaces. Amines, for example, are particularly aggressive to rubbers and plastics.

Image-2

Continued exposure of susceptible surface materials to incompatible disinfectants causes cracks to rupture and deepen.

Cracks lead to premature failure of equipment and make surfaces harder to disinfect: providing a reservoir for pathogens.

The solution

Preventing material incompatibility takes a bilateral approach. Working together:

Icons-compatibility-02

Surface and device manufacturers need to select more durable materials

Icons-compatibility-01

Disinfectant manufacturers need to create more surface-friendly formulations

Our commitment to you

Our products are always formulated to provide both unbeatable efficacy and compatibility. With GAMA, you will never be forced to sacrifice clinical efficacy in order to preserve your equipment.

Resources

Latest

Research
Asymptomatic transmission blog.jpg

Is asymptomatic transmission the major driver of t…

In this week's research article, we discuss whether asymptomatic …

Research
21.09.2020_Improving hospital cleaning and disinfection.jpg

Improving hospital cleaning and disinfection

The third largest health board in Scotland has recently published…

Research
shutterstock_289471151.jpg

28 Australian Societies provide consensus on COVID…

Sourcing up-to-date reliable information on COVID-19 management a…

Research
20.07.2020_Let’s not forget MRSA and the risk from contaminated surfaces-01-01 copy.jpg

Let’s not forget MRSA and the risk from contaminat…

There is strong evidence that MRSA transmission dynamics can incl…