Paper Tearing Tester SLD-J

Product Name: Paper Tearing Tester

Product Model: SLD-J

Basic Application Scope: This paper tearing tester is a specialized instrument for determining the tearing strength of paper. Its main technical indicators and performance parameters comply with relevant standards such as ISO 1974 "Paper—Determination of Tearing Resistance (Elmendorf Method)" and GB 455.1 "Method for Determination of Paper Tearing Resistance." It is an ideal testing instrument for industries and departments including papermaking, scientific research, and product quality supervision and inspection.

Technical Indicators:

Parameter Item: Technical Indicator

Measurement Range: (10–1000) mN, with the standard pendulum and light pendulum as standard configurations; the lightest pendulum is custom-made according to user requirements.

Standard Pendulum: (10–1000) mN, division value 10 mN

Light Pendulum: (10–500) mN, division value 5 mN

Lightest Pendulum: (10–200) mN, division value 2 mN

Indication Accuracy: Indication Error: ±1% within 20%–80% of the upper limit value, ±0.5% FS outside the range

Indication Repeatability Error: ≤1% within 20%–80% of the upper limit value, ≤0.5% FS outside the range

Tearing Force Arm: (104 ± 1) mm

Initial Tearing Angle: 27.5° ± 0.5°

Tearing Distance: (43 ± 0.5) mm

Paper Clamping Surface Dimensions: (25 × 15) mm

Distance Between Paper Clamps: (2.8 ± 0.3) mm

Structure of the Tearing Tester

The tearing tester mainly consists of a pendulum system, paper clamping mechanism, paper cutting mechanism, and indicating device.

1. Pendulum System: Composed of a sector pendulum and main shaft system, it provides the power required to tear the sample through the potential energy–kinetic energy conversion of the pendulum during the tearing process.

2. Paper Clamping Mechanism: Consists of two sets of clamps installed on the base and the pendulum body, respectively, used to firmly hold the sample under specified conditions.

3. Paper Cutting Mechanism: Composed of a knife holder, blade, etc., used to pre-cut the sample to the specified dimensions.

Indicating Device: Consists of a pointer system and a force dial.

National Standards: GB/T 455.1, GB/T 2679.5