Strip evenness tester

The Strip Evenness Tester is a high-performance textile laboratory instrument designed to analyze the density and uniformity of fine yarn, roving, and sliver. It provides precise detection of unevenness in cotton, wool, hemp, chemical fiber short fibers, and blended yarns. This instrument enables detailed analysis of the causes of unevenness, offering valuable insights for quality control and production optimization.

Application

The Strip Evenness Tester is suitable for:

(1) Cotton Industry: Testing yarn, roving, and sliver for CV%, U%, thick/thin places, and neps.

(2) Wool Processing: Evaluating short fiber uniformity in wool and blended yarns.

(3) Chemical Fiber Production: Monitoring the consistency of synthetic fibers, including polyester, nylon, and viscose.

(4) Textile Laboratories: Quality control of spun, blended, or pure fiber yarns.

(5) Extended Applications: Can also be applied to research in fiber blending optimization, automated production line monitoring, and textile defect analysis.

Specific products tested include: cotton yarn, wool yarn, hemp yarn, polyester yarn, viscose yarn, blended fiber yarns, roving, and slivers.

Standards

The Strip Evenness Tester aligns with common textile testing standards, including:

(1) ISO 2060:1995 – Textiles – Determination of linear density of yarns (Tex system)

(2) ISO 1833-1:2020 – Textiles – Quantitative chemical analysis of fiber mixtures

(3) ASTM D1425 – Standard Test Method for Evenness of Yarn

(4) GB/T 3811-2010 – Testing of fiber and yarn uniformity

Features

(1) High Precision Measurement: Sensitive capacitance sensors detect minute mass variations in textile strands.

(2) Wide Material Range: Supports cotton, wool, hemp, synthetic, and blended yarns.

(3) Comprehensive Analysis: Provides CV%, U%, imperfections, spectrograms, vari-length curves, and linear density distribution.

(4) High-Speed Testing: Capable of up to 800 m/min for rapid production monitoring.

(5) Automated Operation: Features automatic yarn feeding, zero adjustment, and defect alarms.

(6) Expert Analysis Software: Integrated software for root cause diagnosis and corrective action suggestions.

(7) User-Friendly Interface: Windows-based graphical interface for intuitive operation and visualization.

(8) Data Management: Stores, replays, and prints test data for long-term analysis.

Parameters

Parameter	Specification
Capacitor Detection Slots	4
Test Range	4 tex – 80 ktex
Test Speed	8, 25, 50, 100, 200, 400, 800 m/min
Test Time	10 sec – 20 min, adjustable
CV%, U% Value Range	0.2% – 100%
Variation-Length Curve	Cutting length: 1 cm – 1000 m
Defects Output	Three types simultaneously: - Details: -30%, -40%, -50%, -60% - Coarse section: +35%, +50%, +70%, +100% - Cotton knot: +140%, +200%, +280%, +400%
Spectral Diagram	170 channels, wavelength range 1 cm – 2000 m
Linear Density Frequency Distribution	-100% – +100%, +100% – +400%
DR% Values	DR(1m, +5%), DR(1m, -5%), DR(20cm, +35%), DR(20cm, -30%)
Number of Batch Measurements	≤20
Power Supply	AC 220V ±10%, 50Hz ±5Hz
Power Consumption	≤400 VA

Accessories

(1) Main testing unit – 1 set

(2) Sample holders – 4 pcs

(3) Calibration weights – 1 set

(4) Power cable – 1 pcs

(5) User manual – 1 set

(6) Software CD – 1 pcs

(7) Certificate of Quality – 1 set

Test Procedures

(1) Mount the yarn, roving, or sliver sample into the detection slots.

(2) Set the test speed, time, and desired output parameters on the interface.

(3) Start the measurement; the capacitance sensors detect density variations along the sample.

(4) Observe the real-time graphical outputs, including CV%, U%, and variation-length curves.

(5) The system automatically calculates defects, spectral distribution, and DR% values.

(6) Save or print the test results for analysis and record-keeping.

Maintenance Information

(1) Clean sensor slots and sample holders after each test.

(2) Periodically check calibration using standard reference yarns.

(3) Lubricate moving parts according to the manufacturer’s instructions.

(4) Store the instrument in a dry, dust-free environment to prevent sensor degradation.

(5) Perform software updates and backups regularly to maintain data integrity.

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