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Williams Parallel Plate Plastimeter - P2

Mã sản phẩm: Plastimeter - P2
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Williams Parallel Plate Plastimeter - P2

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Williams Parallel Plate Plastimeter - P2

Thickness Gauge

For the Recovery test, a separate thickness gauge is required to accurately measure the thickness of the test sample. It should have a presser foot of 25 mm diameter actuated with a dead weight force of 0.8 ± 0.03N. A suitable instrument is available under ref. S.4/13 at extra cost.

Plasticity Test

The test sample is placed between two pieces of suitable material to prevent it sticking to the platens during the test, and to allow for this, the dial gauge of the Plastimeter is set to zero with two pieces of such material between the platens (without the test sample). If an oven is used the sample is then pre-heated at the test temperature for 15 min.

The pre-heated sample is placed between the two pieces of material and inserted between the platens. The upper platen is lowered, and at the end of the required time interval, the height of the sample is recorded in millimetres. (h1)

Plasticity number P = 100h1

Recovery Tests 'A' and 'B'

Two procedures are specified for the Recovery test. For method A, the test sample is removed from the Plastimeter immediately the Plasticity test described above has been carried out. It is allowed to cool for 1 min. and the height (h2) is measured again
The Recovery, Ra = 100 (h2 - h1)
For Method B, the procedure is similar to that for the Plasticity test except that the sample is compressed to a set height of 5 ± 0.01 mm. At the end of the compression period the sample is removed and allowed to recover for 5 min. at the test temperature. The height of the sample (h3) is measured again.

The Recovery, RB = 100 (h3 - S)

Oven

Under ref. P.2/1 the Parallel Plate Plastimeter is available complete with a Wallace Laboratory Chamber designed specifically for the purpose, which is suitable for temperatures up to 150°C.

Reference

For full details of the test and procedure, refer to Specification ASTM D926-93.

Parallel Plate Plastimeter only                                Ref. P.2
Plastimeter with special Heating Chamber         Ref. P.2/1
Rotary Specimen Cutter, 16 mm dia.                    Ref. P.2/10
Bench Thickness Gauge                                         Ref. S.4/13

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