Paper Curl and Stiffness Tester ZY-TDY300

Purpose of the stiffness tester:

The Paper and Board Flexural Stiffness Tester is a testing instrument designed to measure the flexural stiffness of low-grammage paper and board materials. It is used to evaluate the stiffness and resilience of flexible materials, and allows users to set parameters such as the direction of the specimen (longitudinal or transverse), tension level, test speed, and bending angle according to specific testing requirements. It is primarily used to measure the flexural stiffness of various composite materials, including paper, paperboard, film, plastic, wire, and metal foil.

Principle of Operation：

Under specified conditions, measure the force or torque required to bend a specimen clamped at one end to a 15-degree angle, expressed in gf·cm (mN). If the specimen is too stiff or breaks when bent to a 15-degree angle, the specimen may be bent to a 7.5-degree angle; the measurement result can then be multiplied by 2 to obtain an approximate value, but this must be noted in the report.

Basis for the Standard：

GB/T 2679.3 Determination of Stiffness of Paper and Paperboard
GB/T 22364 Determination of Bending Stiffness of Paper and Paperboard
ISO 2493 Determination of Bending Stiffness of Paper and Paperboard
ISO 5628-2019 Determination of Bending Stiffness of Paper and Paperboard—General Principles for Two-Point, Three-Point, and Four-Point Methods

Product Features：

1. 7.5° and 15° stiffness tests; other angles can be set to any value between 1° and 92° (steplessly adjustable);
2. Test duration can be set to any value between 3 and 30 seconds;
3. Test angle changes are fully automatically controlled by a motor, improving measurement efficiency and reducing human error;
4. Supports testing of 8 different bend lengths: 50 mm, 25 mm, 10 mm, etc.;
5. Features an automatic zeroing function, eliminating the need for manual alignment of the specimen before testing;
6. Features measurement statistics and printing functions; measurement time is adjustable;
7. Returns to the starting position at high speed upon test completion; return speed is adjustable between 1 and 12;
8. The human-machine interface uses a color touchscreen with Chinese and English operating systems and can communicate with host computer software (sold separately);
9. Supports two test functions: 15° bend stiffness and 90° crease stiffness.

Product Configuration：

Standard Configuration: Main unit, mini printer, thermal paper, power cord, user manual, certificate of conformity, warranty card

Optional Accessories: Firmness sampler, calibration weights, professional software, communication cable, dedicated firmness sampler

Applications of the Paper Stiffness Tester:

1. Bending stiffness testing of paper, cardboard, films, plastic films, and thin sheets
2. Crease and indentation stiffness testing of packaging boxes such as color boxes and toothpaste tubes
3. Stiffness testing of graphite sheets, optical films, non-woven fabrics, and composite sheet materials
4. Stiffness testing of wires, power cords, and metal flat cables
5. Stiffness testing of optical films, metal foils, light guides, diffusion plates, and TV back panels