JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 32

I A new type of SMC: with improved “Construction” 1- NICOLE BUSAM, POLYNT GMBH & CO. KG, GERMANY 2- OLIVER TÜRK, POLYNT GMBH & CO. KG, GERMANY 3- ALESSANDRO TOZZI, POLYNT SPA, ITALY 4- FRANCESCO BONFANTI, POLYNT SPA, ITALY 1 2 3 4 Sheet Moulding Compound (SMC) is a material that can be easily tailored to specific needs due to its multi-component composition (glass fibres, thermosetting resins, filler, pigments, and additives). Outdoor products like electrical cabinets are traditional applications which have been known for decades. Weathering or ageing? Methodology weathering resistance for outdoor applications FEATURE formulation with superior anti-ageing properties was developed. This family of materials will be marketed under the trade name DURA-LYNT™. n outdoor applications, electrical insulation, good mechanical properties, homogenous moulded-in colour and high weathering resistance (resistance to UV rays, water, and aggressive gases) are the key demands on the product (figure 1). Although the properties of existing materials make it possible to use the cabinets for more than 30 years without loss of functionality, customers often ask for materials with even higher weathering resistance, offering better colour stability and less decay of the resin matrix at the surface of the moulded part. Following investigation to gain more insight into the factors contributing to the weathering or ageing of the material, a new Fig. 1: Electrical cabinet before (left) and after long-term outdoor exposure (right). JEC Composites Magazine / No33 June 2007 The lifetime of SMC parts used in outdoor applications usually depends on the alteration of material properties with time, a process which can be called “ageing”. Ageing refers to all the processes that are involved when irreversible chemical or physical changes take place in the material. The effects of chemical ageing include alterations in the chemical structure of the polymer matrix, e.g. molecular weight distribution, due to cracking and formation of bonds. Physical ageing effects include recrystallization and relaxation of intra- or intermolecular stresses. For SMC producers, it is important to understand the correlation between the composition of the formulation, the influences of production and processing, and the influences exerted by the environment. The factors involved in material ageing processes are shown schematically in figure 2. Fig. 2: Factors influencing material ageing. To quantify the damages in the material caused by weathering,

JEC COMPOSITES MAGAZINE - Issue #33 - June 2007

Table of Contents for the Digital Edition of JEC COMPOSITES MAGAZINE - Issue #33 - June 2007

Editorial
Market Place
Advertisers & Index
Contents
NEWS WORLDWIDE
- Companies
- Agenda of events
- Innovations
BUSINESS
- Market survey
- Trends
- Niche markets
- Human capital
FEATURE - CONSTRUCTION
- Process
- Equipment
- Application
USERS’ PLATFORM
- Composites in the world
- Applications
KNOW-HOW
- Stretch-broken fibres
- Metal matrix
- Durability
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 1
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 2
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - Editorial
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - Market Place
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - Advertisers & Index
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - Contents
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 7
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - - Companies
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 9
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 10
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 11
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - - Agenda of events
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 13
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - - Innovations
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 15
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 16
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 17
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 18
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JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 21
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 22
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - BUSINESS
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - - Market survey
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 25
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 26
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - - Trends
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 28
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - - Niche markets
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - - Human capital
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - FEATURE - CONSTRUCTION
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - - Process
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 33
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - - Equipment
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 35
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 36
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - - Application
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 38
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 39
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 40
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 41
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JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 53
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 54
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - USERS’ PLATFORM
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - - Composites in the world
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 57
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - - Applications
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 59
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 60
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 61
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 62
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - KNOW-HOW
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - - Stretch-broken fibres
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 65
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 66
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - - Metal matrix
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 68
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 69
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 70
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - - Durability
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 72
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 73
JEC COMPOSITES MAGAZINE - Issue #33 - June 2007 - 74
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