Migration Pool

Basic composition

Scope of application:
There is a sealing ring on the ring (the red part in the figure), making it more suitable for conducting migration tests on thick or inelastic materials.
However, it must be noted that the sealing ring may come into contact with food simulants, which may cause external migration and contamination, so a blank comparison test must be conducted.

advantage:
There are various sizes available, suitable for testing in situations where it is inconvenient to cut the sample to standard size, such as yogurt cup lids
Stainless steel material, suitable for all food simulants in the EU plastic regulation EU (No.) 10/2011;

The products include:
(A) A fixed plate, number: 715318
a. Stainless steel plate (VA 1.4571) with threaded holes, internally polished;
b. Includes 4 stainless steel bolts, plastic star nuts, and threads (DIN 125B A2)

(B) Several types of central rings
a. Internally made of stainless steel material (VA 1.4571) and filled with connectors compatible with GL14 threads, covering the spiral cap GL14 (PBT shell+PTFE/Sil.); Sealed)
b. 2 O-rings FEP/Silicone suitable for grooves in the center ring (top and bottom)
c. Aluminum positioning plate (excluding width DN120)

Basic operation method:

The migration pool includes:

Product Number:715318 Stainless steel fixed plate

2 x VA 1.4571Plate with threaded holes, polished internally.

4 xstainless steel screw(M8)

4 xStainless steel knurled flat head screw

4 x PTFEFeet, white

4 xStainless steel plate‘Sieg-Mi-Flex’grommet

Product Number:715351 Glass fixed plate

2 xSchott board with threaded holes

4 xstainless steel screw(M8)

4 xStainless steel knurled flat head screw

4 x PTFEFeet, white

4 x PTFEProtective plug pad, for screws

Product Number:7153. Stainless steel center ring

1 xcenter ring(DN30-DN120), VA 1.4571,Connecting components with cast in and cast out, GL14thread

2 x GL14sealing cap(PPScasing+ PTFE/silicon seal)

2 x FEP/siliconORing, groove suitable for center ring

1 xPositioner, by1.4301 V2Amade from( DN120except!)

Product Number:715351 Glass center ring

1 x DN120Central ring, Schott glass,ID max. 8.5 – 9 mm,Cast in and cast out connectors,GL14thread

2 xsealing capGL14 (PPScasing+ PTFE/silicon seal)

2 x FEP/siliconORing, groove suitable for center ring

The above are: protective pads for screws,GL14Sealing cap, stainless steel knurled flat head screw,OCircle shape.

Assembly diagram:

‘Sieg-Mi-Flex’The appearance of the stainless steel migration pool upon delivery.

Loosen the screw in connection diagonally and remove the top fixing plate.

Place the material sample on the fixed plate, with the surface to be tested facing the food simulant. Next, place the locator and a suitable center ring.

Place the second material sample on the center ring, with the surface to be tested facing the food simulant.

Place the top fixing plate and‘Sieg-Mi-Flex’Gasket.

Tighten the stainless steel knurled flat head screws diagonally.

Make the migration pool vertical.

Remove the sealing cap and insert the funnel.

Add food simulants to the central ring.

Cover with a sealing cap to seal.

Place the migration pool vertically in a drying oven at the necessary temperature.

At the end of the test, remove the migration pool from the drying oven (warning: very hot!), cool it to room temperature, and carefully open it.

technical specifications

Allow internal operating pressure:9 bar

Allowable operating temperature:Max. 180°C

Capacity:0.22 ltr

Material: Stainless steel 1.4571

Note: This migration pool isGB 5009.156-2016The migration test pool specified in the general rules for preprocessing migration experimentsCAnd comply with EU standards10/2011Food contact plastics and containers.

Specification type:

Principles for selecting migration pools

The purpose of using a migration pool is to transfer trace harmful substances from packaging materials to the liquid of food simulants under different conditions such as temperature, time, and acidity. Then, other methods such as mass spectrometry and chromatography are used to detect the content of harmful substances in the liquid, in order to determine whether the gas is harmless to humans or within legal standards.

Migration pools are divided into single-sided and double-sided types, which means that if the packaging material to be tested is in single-sided or double-sided contact with food, it needs to be distinguished and tested separately. For example, the outer packaging of instant noodles and the packaging of seasonings are two types of contact methods.

LABCThe migration pool supports both single-sided and double-sided material testing, which can reduce the hassle of selection;

In terms of material, the migration pool itself needs to have no trace substance precipitation to interfere with the accuracy of the experiment,LABCThe migration pool includes three types of materials: Schott glass, polytetrafluoroethylene, and metal. The metal is resistant to high temperatures180℃, able to withstand certain pressure; Polytetrafluoroethylene products are waiting to be promoted; Schott Glass's migration pool can achieve130℃, the advantage is that it is completely transparent and the internal state can be seen.

Migration experiments are conducted for subsequent testing, so the amount of food simulant liquid is a factor in selection. If there are many types of experiments to be conducted in the later stage, a larger volume migration pool should be selected to facilitate obtaining sufficient experimental samples in one experiment; At the same time, the area of the sample is also a factor to consider, because the diameter of a large volume migration pool is relatively large, and the sample needs to be fixed on one side of the central ring. The sample needs to be large enough.

Note: This migration pool isGB 5009.156-2016The migration test pool specified in the general rules for preprocessing migration experimentsCAnd comply with EU standards10/2011Food contact plastics and containers.

Suggestion: If the sample diameter is large enough, chooseDN120Type, meeting the conditions for sufficient liquid in subsequent experiments;

If there are specific requirements for the sample diameter, there areDN30、DN60-DN120Optional;

Need to achieve high temperature180℃, choose metal type;

If the temperature requirement is not high and you want to observe the internal state, you can choose Schott glass type.

For thin film detection: recommended selectionDN120Metal type, made of thin material, can be used on both sides, temperature resistant180℃, the subsequent sample volume is relatively large. If there are special conditions, you can choose according to the suggestion.

Common specifications and configurations (stainless steel type)