EN 1067-2005 pdf download.Adhesives – Examination and preparation of samples for testing.
5 Preliminary procedure for fluid products consisting of a single homogeneous
liquid phase or two liquid phases 1)
5.1 Visual examination
5.1.1 Ullage
Record the approximate ullage, i.e. the air-space above the contents of the container, expressed as a
percentage of the total capacity of the container.
5.1.2 Surface skin
Record the presence of any surface skin and its type, i.e. whether continuous, whether hard or soft and whether thin or moderately 04 excessively thick. If any skin is present detach it as complet&y as possible from the sides of the container and remove It, if necessary by sieving. Record the ease of removal.
5.1.3 ConsIstency
Record whether the sample is thixotropic or whether gelling has taken place, taking care not to confuse gelling and thixotropy.
NOTE Both thixotropic and gelled adhesives have a jelly44ke consistency, but whereas the consistency of the former is markedly reduced by stirring or shaking, the consistency of a gelled adhesive cannot be reduced in this way
5.1.4 Separation of phases
Record any separation of the sample into layers, for example water and resinous matter.
5.1.5 Visible impurities
If there are any visible impurities, record their presence and remove them if possible.
5.1.6 Sediment
If there is any appreciable sediment, record Its presence and appearance.
5.1.7 ClarIty
Record the clarity and colour of the sample.
5.1.8 Odour
Record any odour detected.
6 Preliminary procedure for fluid products consisting of one or two liquid phases
together with one or more solid phases 2)
6.1 VIsual examination
6.1.1 Ullage
Record the approximate ullage. i.e. the air-space above the contents of the container, expressed as a
percentage of the total capacity of the container.
6.1.2 Surface skin
Record the presence of any surface skin and its type. i.e. whether continuous, whether hard or soft, and its approximate thickness. If any skin is present, detach it as completely as possible from the sides of the container and remove it, if necessary by sieving. Record the ease of removal.
6.1.3 Consistency
Record whether the adhesive is thixotropic or whether gelling has taken place, taking care not to confuse gelling and thixotropy.
NOTE Both thixotrop.c and gelled adhesives have a jelly-like consistency, but whereas the consistency of the former Is markedly reduced by stirring or shaking, the consistency of a gelled adhesive cannot be reduced In this way.
6.1.4 Separation of phases
Record any separation of the samples into phases.
6.1.5 Settling
Record the type of settling, for example soft, hard or hard-dry. If the settling is hard and appears dry and
crumbly inside a lump when cut with a clean palette knife, describe it as ‘hard-dry’.
6.1.6 Extraneous matter
Remove any extraneous matter In the adhesive as carefully as possible and record its presence.
6.1.7 Odour
Record any odour detected.
NOTE Care should be taken with regard to any resultant health hazards.
6.2.2 General
During all the operations specifled in 6.2.3 to 6.2.5 care shall be taken to ensure minimum loss of solvent.
To this end, all the operations shall be carried out as rapidly as practicable and consistent with satisfactory
mixing.
6.2.3 Removal of skin
If the original sample contained skin, remove any remnants by straining the incorporated sample under its own weight, through a sieve conforming to ISO 565, of nominal aperture 125 .tm unless otherwise specified
6.2.4 No occurrence of hard settling
Mix the sample thoroughly, even if there is no perceptible settling.
NOTE If the samples is less than 250 g a palette knife Is pieferred as an alternative to the stouter stirrer normally used for larger samples.
Firmly replace the lid of the container and thoroughly shake the contents, inverting the container as this is being done. Repeat the alternate stirring and shaking until the contents are completely homogeneous, As an added precaution, it is recommended that the mixing be completed by pouring the contents into a clean container and back again several times. At all times during the sample preparation avoid, as far as possible, entrainment of air. The samples shall be free from air bubbles befoe use.
6.2.5 Occurrence of hard settling
The examination of a sample in which hard settling has occurred (but not hard-dry settling, see 6.2.1) shall be completed in accordance with the procedure detailed below.
Pour all the fluid medium into a clean container, Remove the settled pigment from the bottom of the container with a palette knife and mix thoroughly.
When a uniform consistency has been actileved, return the medium to the original container, a small portion at a time, carefully incorporating each addition before the next is made. Complete the reincorporation by pouflng from one container to the other several times (see 6.2,4). Ensure that the sample is free from air bubbles before use.
7 Preliminary procedure for viscous products3)
Examine these products in general as for fluid products under Clause 6.
NOTE Where mixing appears to be necessary to ensure homogeneity, a small, heavy.duty mixer can be used.EN 1067-2005 pdf download.