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ACS

Sanitary conformity accreditation
Institut Pasteur
Drinking water approval for France
 

Ageing protection

Ageing protection agents, such as ozone protection agents, are organic compounds used in relatively small dosages in order to prevent the vulcanised material from ageing. Unfortunately, it is not always possible to effectively combat the effects of ageing with a single protective agent. What this calls for instead is a range of complementary protective agents applied to fulfil all practical requirements. Depending on the protective effect applied, the distinction is made between:

- anti-oxidants which are particularly effective in combating the effects of oxygen
- anti-ozone agents which principally delay or prevent the appearance of cracks caused by the effects of ozone under static load
- special protective agents providing protection against particular types of ageing, e.g. light, repeated bending fatigue, hydrolysis, etc.
 

APQP

Advanced Product Quality Planning (APQP) is an ongoing system of project management applied for product and quality planning purposes, and applicable for all phases of the development process.

The objective is to create a standardised and product-related document structure providing the user (the manufacturer) with the necessary degree of transparency for the manufacturing process. The intention here is to simplify product control. All of the information and documents of relevance to the project and product are centrally planned, monitored and administered.
 

AQL Acceptance Quality Level

The AQL Level is a figure calculated from random sampling (acceptable quality limits) that defines the percentage of faulty parts that a delivered quantity is allowed to contain. The level is negotiated between customer and supplier.
 

Artificial ageing

The degradation of polymers and polymer networks takes place through the application of energy in the form of heat and light, and due to oxidisation processes. The various ageing processes are differentiated on the basis of the various processes involved:
- thermal ageing
- effects of ozone exposure
- effects of UV radiation exposure
- effects of oxygen exposure
- effects of mechanical loadings (creation of fatigue-induced cracks)