Rubber Rapid Plasticity Tester

1. Introduction
LT-3030Rubber Rapid Plasticity TesterUsed to test the rapid plasticity value (initial plasticity value P0) and plasticity retention rate (PRI) of natural rubber and uncured plastics (mixed rubber). This instrument consists of a main unit, a punching machine (including a cutting blade), a high-precision aging test chamber, a thickness gauge, and other components. The rapid plasticity value P0 is obtained by rapidly compressing a cylindrical specimen between two parallel pressure blocks to a fixed thickness of 1mm using a host machine. The test specimen is held in a compressed state for 15 seconds to achieve temperature equilibrium with the parallel plate. Then, a constant pressure of 100N+1N is applied to the specimen and held for 15 seconds. At the end of this stage, the measured test thickness is used as a measure of plasticity through an observation instrument.
The plasticity retention rate PRI is measured by aging the sample at 140 ° C for 30 minutes in a high-precision aging chamber, and the plasticity value P30 is obtained by calculating the PRI value. PRI value is a measure of the heat oxidation resistance of natural rubber, with higher values indicating better heat oxidation resistance. This machine adopts electronic direct temperature control, which heats up quickly and has high accuracy. At the same time, the machine uses standard weights for direct loading, overcoming the disadvantages of instability and zero drift caused by the pressure of the load electromagnetic spring.
2、 Execution standards
GB/T3510 ISO2007 GB/T3517 ISO2930
3、 Technical indicator A, Host:
1. Temperature control: 100 ± 0.1 ℃
2. Loading value: 100 ± 1N
3. Power supply voltage: AC 220V ± 10%
4. Upper pressure plate: diameter 7.3 ± 0.02mm, diameter 10 ± 0.02mm, diameter 14 ± 0.02mm, effective height 3.2mm
5. Lower pressure plate: φ 16mm B. Aging box:
1. Control temperature: 140 ± 0.1 ℃
2. Power supply voltage: AC 220V ± 10%
3. Timing time: 30 minutes ± 5 seconds

working principle:

The basic working principle of the LT-3030 rapid plasticity meter is as follows: when two parallel plates are at a temperature of 100 ℃, with the upper pressure plate fixed to the moving crossbeam and the lower pressure plate being a movable parallel plate, the sample is first compressed to 1mm and held for 15 seconds until the sample temperature reaches the specified temperature. Then, a force of 100N is applied, and the distance change between the two parallel plates is measured within 15 seconds, accurate to 0.01mm. This value represents the compressibility of the sample, that is, the rapid plasticity value Po.

The LT-3030 rapid plasticity meter can be used to measure the plasticity retention rate (PRI) of natural rubber. The basic method is to divide the same sample into two groups, one group directly measures the initial plasticity value Po, and the other group is placed in a dedicated aging box. After aging for 30 minutes at a temperature of 140 ± 0.1 ℃, the plasticity value P30 is measured. The two sets of data are calculated using the following experiment:

PRI= ×100％

Among them: Pom --------- median plasticity before aging

P. 30m ---------- Median plasticity after aging

The PRI value represents the antioxidant performance of natural rubber, and the higher the value, the better the antioxidant performance.

Features:

1. This instrument can measure the rapid plasticity values of raw rubber and uncured rubber compounds, as well as the plasticity retention rate (PRI) of natural raw rubber.

2. Sample aging: The aging chamber has 16 sets of aging sample trays, which can age 16 × 3 samples simultaneously, with each aging temperature at 140 ± 0.1 ℃.

3. This instrument complies with the technical requirements of ISO2007 and ISO2930 for instruments.

4. This instrument is easy to operate and fast. Easy to maintain, easy to calibrate, high precision, and good stability.