Moisture resistant microbial penetration tester

Applicable Scope:

An electric yarn twist tester is used to measure the twist of single or double yarns. It is used to measure the twist of cotton, wool, linen, chemical fiber and other yarns.

A fan arm twist instrument suitable for traditional or no twist/double twist testing.

Test length up to 50cm/20 inches (S&Z twist).

Product details:

The instrument is composed of control box (digital display), tension mechanism, yarn inserting frame and other components.

The rotating direction, rotating speed, starting and stopping of the main machine's untwisting chuck are controlled by the control box. The twisting number of the test is displayed by the control display box through photoelectric conversion.

The distance of the instrument can be adjusted, the tension is exerted by the vertical pointer lever during the test, and the zero-stop automatic photoelectric sensor is adopted.

Technical parameters:

1. Test method: direct counting method, first untwist method, second untwist method, third untwist method;

2. Twist untwisting speed: 0~1600rpm, stepless adjustable;

3. Test length of sample: 0~500mm, adjustable;

4. Elongation Range: 0~100mm(0-4 inches)

5. Number of twists: 1~9999;

6. Turn of untwist chuck: forward and reverse rotation;

7. Transmission mode: separate motor belt transmission;

8. Accuracy: 1 bit (counter), ±0.5mm(zero);

9. Size: 1070×300×290mm(L×W×H);

10. Weight: 16kg(36lb);

11. Power supply: 100~240V 50Hz/60Hz.

Yarn twist test Method:

1. Test process analysis of direct untwist method

Test process: The sample is clamped between two grippers with a length of 250mm, and the pre-added tension is calculated according to (0.5±0.1) cN/ Tex.

Untwist the specimen until it is possible to translate the analysis needle from the unrotated gripper to the rotated gripper (with the aid of a magnifying glass if necessary) to ensure complete untwisting.

Read twist number n, then yarn twist Tt=n/2.5 (twist /10cm).

2. Analysis of the testing process of the one-untwist and twist method

Test process: The sample is clamped between two grippers with a length of 250mm, the limit length is 4mm (to prevent yarn breaking due to twisting and stretching), and the pretension is calculated as 1.83T - 1.42cn according to the following formula.

Untwist and reverse twist the sample until it returns to the original clamping length. Read the rotary reading N, then the twist of the sample Tt=n/5 (twist /10cm).

Test analysis: Two samples were used for each test, with a clamping length of 500mm and a limit length of 5mm. The prestressing tension was calculated according to 0.5CN/Tex.

The twist of the first sample is Tt= (n1 -- n2)/ 10 (twist /10cm), and the twist of the second sample is read as n1 -- 4, and then the counter is reset to zero. The twist of the second sample is read as n2 and subtracted N1/4 -- n2 to get n2.

In practice, you can test a batch of data to get an average reading of N1.

4. Test and analysis process of triple back twist and twist method

Test process: Clamp the sample between two chucks with a length of 500mm and a limit length of 5mm. Pretension is calculated according to 1cN/ Tex.

Untwist and reverse twist the sample until it returns to the original clamping length for 3 times in total. After each operation, the counter reading should be read first, and then the reversing spanner should be shifted and the counter should be cleared before the next untwisting operation.

After the first untwisting and twisting operation, read A, take the reading B 'after the second untwisting and write down the reading C' after the third untwisting and twisting operation, make B=B '-a, C=C' -b, then the twist measured in this test is Tt=(A-2B C)/200 (twist /10cm).