Hole Formation Films

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Hole formation films

General information

When analysing damage to thermoplastic products (see: failure analysis – basics), damage caused by faulty design, processing and material selection, as well as defects (see also: errors) in the matrix material and additives, or even defects that occur during use, are analysed using polymer testing and diagnostic methods (see also: damage analysis of plastic products, VDI Guideline 3822).

Damage that occurs during the use of plastic products can cause a variety of damage patterns. In the context of the ‘Wiki-lexicon Polymer Testing & Diagnostics’, the damage phenomenon ‘Hole formation plastics’ is examined using examples from the evaluation of the deformation and fracture behaviour of fibre-reinforced plastics, particularly at the fibre/matrix interface. Two examples of this are listed under

Hole formation in a biopolymer film

Another example of the damage phenomenon ‘Hole formation’ as a result of artificial weathering is shown in Figure 1 [1]. A conventionally available biopolymer film (see also: bio-plastics) with the trade name Mater-Bi® (mulch film), a starch blend based on corn starch, with a thickness of 15 µm was subjected to 30 hours of artificial weathering.

Fig. 1:

Hole formation in a Mater-Bi® mulch film after 30 hours of artificial weathering

Figure 1 shows a surface damaged by artificial weathering. Holes have begun to form, and it is clear that damage to the surface of the biopolymer film is beginning.

General information

Hole formation in a biopolymer film

See also