In the fast-paced world of industrial manufacturing and recycling, precision and efficiency are non-negotiable. At HTsorter, we’re leading this transformation with cutting-edge solutions like plastic pellet sorting machines for the recycling industry, optical sorters for plastic granules in manufacturing, and high-speed plastic pellet color sorters for injection molding. These innovations are redefining quality control, sustainability, and profitability across sectors.  

Precision Meets Sustainability  

Traditional sorting methods often struggle with mixed plastics or subtle color variations, leading to material waste and higher costs. Modern optical sorters equipped with AI-driven imaging systems, like those in HTsorter’s plastic pellet color sorters, analyze materials at microscopic levels. By identifying defects or contaminants in real time, these systems ensure only high-quality pellets move forward in production—critical for industries like injection molding, where material consistency directly impacts product integrity.  

Adapting to Complex Recycling Streams  

The recycling industry faces unique challenges, such as sorting black plastics or mixed polymers. HTsorter’s plastic pellet sorting machines integrate near-infrared (NIR) spectroscopy and multi-core image processing to distinguish materials by chemical composition. For example, our systems can separate PET from PVC in mixed waste streams, transforming low-value recyclables into pure, reusable pellets—boosting circular economy goals while reducing landfill dependence.  

Speed Without Compromise  

In high-volume manufacturing, downtime is costly. HTsorter’s high-speed color sorters process up to 6 tons of materials per hour with 99.99% accuracy, thanks to advanced CCD sensors and adaptive air-jet ejectors. This efficiency is vital for injection molding facilities, where rapid material turnover and flawless pellet quality are essential to meet tight production schedules.  

Smart Technology for Smarter Workflows  

Beyond hardware, HTsorter’s machines feature IoT-enabled platforms for remote monitoring and predictive maintenance. Operators can adjust sorting parameters via intuitive interfaces, while cloud-based analytics track performance trends. This adaptability ensures seamless integration into existing production lines, minimizing training time and maximizing ROI.  

Why Industries Trust HTsorter  

- Versatility: From rigid bottles to flexible films, our sorters handle diverse materials.  

- Energy Efficiency: Low-power designs reduce operational costs by up to 30%.  

- Global Support: 24/7 technical assistance ensures uninterrupted workflows.  

Intelligent color sorters are no longer a luxury—they’re a necessity for industries aiming to balance productivity, sustainability, and competitiveness. With HTsorter’s plastic pellet sorting machines, optical sorters, and high-speed systems, businesses can future-proof their operations while contributing to a cleaner, more efficient industrial landscape.  

Selecting the ideal color sorting machine requires balancing precision, adaptability, and industry-specific needs. At HTsorter, our industrial plastic optical sorting solutions are designed to tackle diverse challenges, from recycling streams to high-purity manufacturing demands. Here’s why our systems stand out in a competitive market.  

Precision for Diverse Applications  

Every industry faces unique sorting challenges. For example, in the recycling sector, mixed plastics and black polymers historically posed difficulties. HTsorter’s optical sorters leverage near-infrared (NIR) spectroscopy and AI-driven imaging to distinguish materials by molecular composition, not just color. This technology ensures accurate separation of PET, PVC, and HDPE with 99.9% efficiency, even in complex waste streams.  

For food-grade plastic recycling, compliance with stringent safety standards is non-negotiable. Our plastic sorting machines for food-grade applications integrate hyperspectral imaging to detect micron-level contaminants, ensuring outputs meet FDA and EU regulations—critical for packaging and medical-grade plastics.  

Speed and Scalability Without Compromise  

High-volume operations demand machines that keep pace. HTsorter’s automated plastic pellet color separation systems process up to 8 tons per hour, thanks to adaptive air-jet ejection and real-time monitoring. This efficiency is vital for industries like injection molding, where downtime translates to lost revenue. Modular designs allow seamless upgrades as production scales, whether for startups or large enterprises.  

Smart Integration for Future-Ready Operations  

Beyond hardware, HTsorter’s IoT-enabled platforms offer remote diagnostics and predictive maintenance, minimizing unplanned downtime. Operators can adjust parameters via user-friendly interfaces, while cloud analytics track performance trends—key for optimizing workflows in dynamic environments.  

Why HTsorter?  

- Compliance-Driven: Built-in protocols ensure outputs meet global safety standards, particularly for sensitive sectors like food and healthcare.  

- Sustainability Focus: Reduce material waste by up to 30% through precise sorting, aligning with circular economy goals.  

- Versatility: From rigid industrial plastics to flexible films, our systems handle diverse materials and shapes.  

- 24/7 Global Support: Technical assistance ensures uninterrupted operations, regardless of location.  

Choosing HTsorter means investing in innovation and reliability. Our solutions don’t just sort materials—they elevate efficiency, compliance, and profitability while contributing to a sustainable industrial future.  

In the world of industrial cooling, scroll air-cooled chillers are spearheading an energy-efficiency revolution. Among them, the newly launched 800kW chiller by H.Stars Group has quickly become a topic of industry discussion. But what qualifies as a “large-scale” unit in this field? Let’s decode the standards of industrial chiller classification from a technical perspective.

1. Understanding Chiller Size Classifications

2. Where Does the 800kW Unit Stand?

3. Compact Design Meets High Power

4. Market Trends: Big Units, Bigger Opportunities

5. Smart Cooling for Industry 4.0

The moisture permeability tester is a professional device used to measure the water vapor transmission rate (WVTR) of textiles, films, non-woven fabrics and other materials. The following are the standard operating procedures and technical points.

I. Equipment structure and principle

Core components

1. Test chamber: sealed chamber with controllable temperature and humidity (usually divided into dry/wet chamber)

2. Weighing system: high-precision balance (0.001g resolution)

3. Temperature control system: PID precise temperature control (range 20-50℃±0.5℃)

4. Humidity system: saturated salt solution or steam generator

5. Data acquisition: automatic recording of mass changes and temperature and humidity

Test principle

Positive cup method (ISO 2528): water vapor permeation from wet chamber to dry chamber

Inverted cup method (ASTM E96): water vapor absorption from dry chamber to wet chamber

Dynamic method (JIS L1099): determination of water vapor carried by airflow

II. Standard operating procedures

1. Sample preparation

Cut a circular sample with a diameter of ≥70mm (no creases/breaks)

If testing multiple layers of materials, stack them according to the actual use direction

Pretreatment: equilibrate at the test temperature and humidity for 24h (GB/T 12704 requirements)

2. Equipment initialization

1. Turn on the constant temperature water bath (set to 23℃ or 38℃)

2. Prepare saturated salt solution:

Dry environment: Mg(NO₃)₂ (RH≈53%)

High humidity environment: K₂SO₄ (RH≈97%)

3. Calibrate the balance (use standard weights)

3. Sample loading and sealing

1. Fix the sample at the mouth of the test cup:

- Positive cup method: add distilled water (liquid surface 3mm away from the sample)

- Inverted cup method: add desiccant (anhydrous CaCl₂)

2. Press with silicone seal to ensure no side leakage

3. Weigh the initial mass (m₀) to an accuracy of 0.001g

4. Test execution

1. Place the test cup in a constant temperature and humidity chamber

2. Set parameters:

Temperature: 23±1℃ or 38±1℃ (select according to the standard)

Air flow rate: 0.5-1.0m/s (dynamic method needs to be set)

Test interval: 1h/time (static method)

3. Start the test, the system automatically records the mass change (m₁, m₂...mₙ)

5. Data processing

Water vapor permeability meter:

WVTR = (Δm×24)/(A×t) Unit: g/(m²·d)

Δm: mass change (g)

A: effective test area (m²)

t: test time (h)

Example:

If the mass decreases by 0.12g within 24h and the test area is 0.00283m², then:

WVTR = (0.12×24)/0.00283 = 1017.7 g/(m²·d)

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The fabric air permeability tester is an instrument specially used to measure the air permeability of fabrics (such as clothing, footwear, industrial textiles, etc.). Its core purpose is to evaluate the ability of materials to allow air to pass under different pressure difference conditions. The following are its main application scenarios and purposes:

1. Quality control and production optimization

Production process verification: Ensure that the air permeability of fabrics during the production process (such as textile, coating, lamination, etc.) meets the design standards to avoid performance degradation due to process deviations.

Batch consistency detection: Compare different batches of raw materials or finished products to maintain the stability of product air permeability.

2. Functional clothing and equipment development

Sports/outdoor clothing: Test the air permeability of products such as assault jackets and mountaineering clothes, and balance the needs of windproof and moisture removal (such as the research and development of fabrics such as GORE-TEX).

Protective equipment: Evaluate the air permeability of medical protective clothing and industrial dustproof clothing to ensure the protective effect while avoiding stuffiness.

Shoe materials and tents: Optimize the air permeability of upper materials or tent fabrics to improve wearing comfort or ventilation performance.

3. Industry standards and certification

Compliance testing: meet international standards (such as ISO 9237, ASTM D737, GB/T 5453, etc.) and obtain product certification (such as CE, OEKO-TEX).

R&D benchmarking: compare competitor or industry benchmark data to guide new product development.

4. Material research and innovation

Evaluation of new materials: test the air permeability efficiency of innovative materials such as nanofibers and breathable membranes to promote technology applications.

Analysis of multi-layer composite materials: study the impact of different laminate structures (such as non-woven fabrics + films) on overall air permeability.

5. User experience and market competitiveness

Comfort quantification: convert air permeability data (such as mm/s or cfm) into product selling points (such as "air permeability increased by 20%)" to enhance market persuasiveness.

Problem diagnosis: for the "stuffy" problem complained by users, locate material or design defects through testing.

Brief description of test principle

The instrument applies a controllable air pressure difference on both sides of a fixed area of fabric to measure the volume of air (or flow rate) passing through per unit time. The results are usually expressed as air permeability (such as L/m²/s) or air permeability resistance, with higher values indicating greater air permeability.

Key parameters for selecting a tester

Test standard compatibility (such as support for multiple international standards)

Range and accuracy (adapting to different materials from dense down-proof fabrics to sparse mesh fabrics)

Automation functions (such as digital pressure regulation, direct data export)

This type of instrument is indispensable in textile laboratories, quality inspection agencies and R&D centers, and directly affects the functional positioning and market acceptance of products.

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High temperature environment can affect the efficiency and accuracy of stepper motors, which may lead to step loss.

1、 Working principle of stepper motor

A stepper motor is a type of motor that converts electrical pulse signals into rotational angle outputs. Each time a pulse signal is received, the stepper motor rotates a fixed angle, usually 1.8 or 0.9 degrees. Therefore, stepper motors can accurately control the rotation angle and speed, and are often used in mechanical equipment that requires precise control.

2、 The impact of high temperature environment on stepper motors

High temperature environments can have a negative impact on the operation of stepper motors. Firstly, high temperatures can cause the temperature of the coils inside the motor to rise, thereby increasing resistance and affecting motor performance. Secondly, the aerodynamic performance in high-temperature environments is poor, which can reduce the cooling efficiency of the motor. Finally, high temperature may also cause expansion and deformation of motor materials, intensify friction, and affect the accuracy and efficiency of the motor.

3、 Step loss problem of stepper motor in high temperature environment

In high temperature environments, the problem of step loss in stepper motors is quite serious. When the temperature of the motor increases, the resistance of the coil will increase, which will cause a decrease in current and affect the rotation of the motor. In addition, high temperature environments can weaken the cooling efficiency of the motor, further exacerbating the problem of step loss. Therefore, to ensure the stability and accuracy of the stepper motor, special protection and control are required in high-temperature environments.

4、 How to solve the problem of step loss in stepper motors under high temperature environment

To solve the problem of step loss of stepper motors in high temperature environments, we can start from the following aspects:

1. Use high temperature resistant materials: Choosing high temperature resistant materials can reduce the high temperature impact on the motor.

2. Regular motor inspection: Regularly check the temperature and condition of the motor to promptly identify and solve problems.

3. Strengthen cooling measures: Increase cooling measures for the motor, such as adding heat sinks, installing fans, and reducing motor workload.

4. Use temperature sensors: Install temperature sensors to monitor the motor temperature in a timely manner, and issue alarms and handle issues promptly when the temperature is too high.

High temperature environment can have a certain degree of impact on the efficiency and accuracy of stepper motors, and even cause step loss problems. To ensure the stability and accuracy of the stepper motor, it is best to use high temperature resistant stepper motor

Ctrl-Motor is the overseas business office established in Shenzhen by DDON （Chengdu, headquartered in Sichuan, China. The company has a team of nearly 100 senior engineers, specializing in the production of special motors ranging from deep low temperature of - 196°C to ultra - high temperature of +300°C and extreme environments.

This article analyzes the system architecture and technical characteristics of rapid temperature change test chambers, by systematically studying the technical parameters and functional design of key components, it provides theoretical guidance for equipment selection and process optimization.

1.Technical Principles and System Architecture

Rapid temperature change test chambers operate based on thermodynamic transfer principles, achieving nonlinear temperature gradient variations through high-precision temperature control systems. Typical equipment can attain temperature change rates ≥15℃/min within a range of -70℃ to +150℃. The system comprises four core modules:

(1) Heat exchange system: Multi-stage cascade refrigeration structure

(2) Air circulation system: Adjustable vertical/horizontal airflow guidance

(3) Intelligent control system: Multivariable PID algorithm

(4) Safety protection system: Triple interlock protection mechanism

2.Analysis of Key Technical Features

2.1 Structural Design Optimization

The chamber adopts modular design with SUS304 stainless steel welding technology. A double-layer Low-E glass observation window achieves >98% thermal resistance. The CFD-optimized drainage channel design reduces steam condensation to <0.5 mL/h.

2.2 Intelligent Control System

Equipped with Japan-made YUDEN UMC1200 controller.

2.3 Refrigeration System Innovation

Incorporates French Tecumseh hermetic scroll compressors with R404A/R23 refrigerants.

 3.Safety and Reliability Design

3.1 Electrical Safety System

• Complies with IEC 61010-1 CLASS 3
•  
• Schneider Electric components with full-circuit isolation
•  
• Grounding resistance <0.1Ω
•  
• Overcurrent protection response <0.1s

3.2 Multi-level Protection

• Triple-channel PT100 temperature monitoring
• Dual pressure switches
• Dry-burn humidity protection
• Emergency pressure relief valve

4.Technological Applications

(1) Aerospace: Thermal-vacuum testing for satellite components

(2) New energy vehicles: Battery pack thermal shock tests

(3) Microelectronics: Chip package reliability verification

(4) Materials science: Composite interlayer thermal stress analysis

5.Technological Trends

(1) Multi-stress coupling tests: Temperature-vibration-humidity simulation

(2) Digital twin integration: Virtual system modeling

(3) AI-driven parameter optimization: Machine learning-based curve tuning

(4) Energy efficiency: 40%+ heat recovery rate

Conclusion: With increasing reliability requirements in advanced industries, future development will emphasize intelligent operation, high precision, and multidimensional environmental simulation. Subsequent research should focus on integrating equipment with product failure mechanism models to advance environmental testing from verification to predictive analysis.

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Amid the wave of the global energy revolution, ice thermal storage technology is emerging as a powerful enabler of smarter, more sustainable energy use. As a pioneer with decades of experience in the HVAC industry, H.Stars Group is at the forefront of integrating technological innovation with environmental responsibility—and ice storage is at the heart of this transformation.

At H.Stars, we've gone beyond the basics—ice storage has evolved into a multi-faceted energy ecosystem that addresses diverse challenges with precision and innovation:

• Industrial Applications:

A glycol ice storage system customized for an automotive manufacturing facility maintains consistent cooling water temperature within ±0.5°C, boosting product yield by 12%.

• Commercial Buildings:

In a major commercial complex in Shanghai, our modular ice storage solution reduced air-conditioning season electricity costs by 40%, cutting carbon emissions by 800 tons annually.

• District Cooling:

In a smart park in Southern China, our distributed ice storage stations, integrated with photovoltaic power systems, optimize clean energy usage and reduce reliance on traditional energy sources.
These real-world cases reflect our transformation from a provider of energy-saving tools to a partner delivering end-to-end energy solutions. By incorporating dynamic load forecasting algorithms and intelligent control systems, H.Stars ensures that every cubic meter of ice releases exactly the cooling energy required—delivering truly on-demand performance.
With China’s dual carbon goals (“peak carbon” and “carbon neutrality”) gaining momentum, H.Stars is scaling up the impact of ice thermal storage across new frontiers:

• Energy Integration:

In a northern data center, our ice storage system works in tandem with waste heat recovery, creating a closed-loop tri-generation system (cooling-heating-power).

• Material Innovation:

Our research into phase-change ice storage materials is increasing cold energy density by 50%, while reducing equipment footprint by one-third.
And the future is even more promising: as ice storage intersects with emerging technologies like hydrogen energy and virtual power plants, it’s no longer just a component of HVAC—it’s becoming a key node in the smart city energy grid.
At H.Stars, we see ice storage not only as an engineering breakthrough, but as a testament to nature’s equilibrium. True innovation, we believe, should shine with technological brilliance while honoring ecological harmony. With ice thermal storage at the core, we continue building a more resilient, intelligent energy ecosystem—where every kilowatt contributes to a sustainable balance between technology and the environment.

Breathability is an important indicator for measuring the comfort of textiles, and is particularly suitable for quality control of products such as sportswear, outdoor equipment, and medical textiles. An air permeability tester can scientifically evaluate the ability of air to pass through fabrics to ensure that the product meets industry standards (such as ISO 9237, ASTM D737, etc.). This article will provide a detailed introduction to the use of an air permeability tester to help you obtain accurate and repeatable test data.

1. Equipment and preparation

(1) Composition of an air permeability tester

Test head: Fixed sample, usually with test holes of different diameters (such as 20cm², 38cm², etc.).

Airflow control system: Adjusts and measures air flow (unit: mm/s or cm³/cm²/s).

Pressure sensor: Detects the pressure difference on both sides of the sample (unit: Pa).

Display/software: Displays test data, and some devices support data export.

(2) Calibration and inspection

Calibration: Calibrate the equipment using a standard calibration plate according to the instructions to ensure accurate data.

Air tightness check: Test whether the airflow is stable when unloaded to avoid air leakage affecting the results.

Environmental conditions: It is recommended to test under standard temperature and humidity (such as 20±2℃, 65±4% RH) to avoid interference from environmental factors.

(3) Sample preparation

Cut at least 5 representative samples (such as 20cm×20cm), avoiding fabric edges or obvious defect areas.

If different parts are tested (such as the front chest and back of the garment), samples must be taken and marked separately.

2. Test steps

(1) Install the sample

1. Loosen the test head clamp and place the sample flat on the test area to avoid wrinkles or stretching.

2. Tighten the clamp evenly to ensure that the sample is fixed and there is no air leakage (you can check by lightly pressing the edge with your fingers).

(2) Set parameters

Test standard: Select the applicable standard (such as ISO 9237, GB/T 5453, etc.).

Test area: Select the test hole size according to the thickness of the sample (small holes for thin fabrics and large holes for thick fabrics).

Pressure difference setting: usually 100Pa or 125Pa, adjusted according to the standard requirements.

(3) Start the test

1. Start the equipment, the system will automatically apply a stable airflow and measure the air permeability.

2. After the value stabilizes (usually 10-30 seconds), record the data (unit: mm/s or L/m²/s).

(4) Repeat the test

Each sample should be tested at least 3 times, and the average value should be taken as the final result.

If the data difference is too large (>10%), it is necessary to check whether the sample is improperly fixed or the equipment is abnormal.

3. Data interpretation and reporting

(1) Common air permeability units

mm/s (millimeter/second): The speed of air flow passing through the fabric vertically.

L/m²/s (liter/square meter/second): The amount of air flow passing through a unit area per unit time.

cfm (cubic feet/minute): Used in some European and American standards.

Summary

Textile air permeability tester is an indispensable tool in research and development, quality inspection and trade. Correct use of equipment and standardized operating procedures can ensure the reliability and comparability of test data. Whether it is product development or acceptance inspection, scientific air permeability evaluation can provide strong support for quality control.

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I. Instrument introduction

The heat and sublimation fastness tester is a professional equipment used to determine the color stability of textiles under high temperature conditions. It mainly evaluates two properties:

1. Heat fastness: color change when the material contacts a high temperature surface

2. Sublimation fastness: color migration caused by the dye directly changing from solid to gas at high temperature

II. Preparation before testing

1. Sample preparation

Cut a sample with a size of 40mm×100mm

The sample needs to be balanced under standard atmospheric conditions (20±2℃, 65±2%RH) for 24 hours

Prepare multi-fiber adjacent fabrics or single-fiber adjacent fabrics of the same size

2. Instrument inspection

Confirm that the surface of the heating plate is clean and free of contamination

Check the accuracy of the temperature control system

Ensure that the pressure device is working properly

Calibrate the temperature sensor

III. Operation steps

Heat fastness test

1. Turn on the power and preheat the equipment to the set temperature (usually 180-210℃)

2. Lay the sample flat on the heating plate

3. Lower the pressure device and apply a standard pressure of (4±1) kPa

4. Start timing and keep contact for 30 seconds

5. Immediately raise the pressure device after the time is up and remove the sample

6. Cool the sample under standard atmospheric conditions

7. Use a gray sample card to assess the discoloration level

Sublimation fastness test

1. Overlap the sample with the front of the adjacent fabric

2. Place in a tester that has been preheated to the set temperature (temperature is selected according to the material type)

3. Apply standard pressure (4±1 kPa)

4. Keep for 30 seconds to 4 minutes (according to the test standard requirements)

5. Take out the sample and cool to room temperature

6. Assess the discoloration of the sample and the staining level of the adjacent fabric respectively

IV. Temperature selection reference

Polyester fabric: 180℃ or 210℃

Other synthetic fibers: adjusted according to the fiber melting point

Natural fibers: usually 150-180℃

V. Result evaluation

1. Use a standard gray sample card to assess:

Discoloration level (1-5, 5 is the best)

Staining level (1-5, 5 is the best)

2. Record the test conditions (temperature, time, pressure)

3. Take photos before and after the test

Related standards

ISO 105-X11: Textile color fastness test

AATCC 133: Heat color fastness

GB/T 8427: Textile color fastness test

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