Issue 04/2016

Blow Moulding
Standard Test Reference LDPE Bio 02-06
Internal procedure * Compression strength No break No break
EN ISO 306 Max. strength** (kg) 10,00 (0,1) 10,00 (0,1)
Internal procedure Impact resistance of 1.20 m freefall No fracture No fracture
EN ISO 306 Vicat temperature (ºC) 100 – 115 104 – 105
(*) Maximum stress 10N
(**) Standard deviation in brackets.
Table 3: Thermal and mechanical properties in small bottles
Table 4: Thermal and mechanical properties in big bottles
Standard Test Reference LDPE Bio 02-06
Internal procedure * Compression strength No break No break
EN ISO 306 Max. strength** (kg) 10,00 (0,1) 10,00 (0,1)
Internal procedure Impact resistance of 1.20 m freefall No fracture No fracture
EN ISO 306 Vicat temperature (ºC) 100 – 115 113 – 114
(*) Maximum stress 10N
(**) Standard deviation in brackets.
Table 5: Hardness of the materials for Caps
Biodegradation (%)
Property Standard PP Bio 16-07
Hardness Shore D EN ISO 868 69 – 72 69 – 72
Figure 3: Visual presentation of the evolution of the biodegradation of pouch in comparison
with the reference cellulose
100
90
80
70
60
50
40
30
20
10
Cellulose
Biocompound pouch
Biocompound probiotic bottle
Biocompound fresh milk bottle
0
0 5 10 15 20 25 30 35 40 45 50 55 60 65 70 75 80 85
Time (days)
• Environmental impact by studying
the Life Cycle Assessment,
evaluation of biodegradability and
compostability of each product
developed and their economic
analysis
Results
Functional characterization
Regarding the functional
characterization, the final products;
pouches, small and big bottles and
caps, fulfil all the requirements,
including sterilization and
pasteurization processes. Tables 2 – 5
show these results.
The microbiological analysis (fig. 2)
suggested that the new packages do
not affect the development of bacterial
and fungal populations naturally
contained in pasteurized milk, or
the growth of selected pathogenic
strains, artificially inoculated in milk
and yogurt. It also doesn’t affect
the viability of lactic acid bacteria
contained in yogurt. In addition,
they do not release any significant
substances in milk and yogurt
stored inside affecting the product.
Therefore, the packages fulfill
the microbiological requirements
established by the product packers.
Regarding to the legal requirements
based on the Overall Migration, the
pouches and both bottles were tested
and they do fulfil the requirements,
according to European Commission
Regulation (EU) No 10/2011 [2].
The use of new biodegradable
packaging does not affect the
organoleptic properties of the
evaluated dairy products. Except for
unflavored low-fat yogurt, where
a consumer panel revealed small
differences between the new bio
bottles and the reference bottles.
Biodegradability and
Compostability
The biodegradation under
controlled composting conditions
was successfully demonstrated for
the different developed compounds
(fig. 3) and they fulfil the requirements
of material characteristics,
biodegradation and compost quality
according to EN 13432 (2000).
Pouches and caps can be concluded
to be fully compostable in industrial
processes and the OK compost logo
and seedling logo were obtained
from the certification institute
14 bioplastics MAGAZINE [04/16] Vol. 11