Ultra-High Molecular Weight Polyethylene (UHMWPE) is an advanced synthetic fiber widely recognized for its exceptional strength-to-weight ratio and outstanding performance in demanding lifting and rigging applications. In recent years, UHMWPE has become an ideal material choice for heavy-duty slings and specialized lifting solutions.

 

UHMWPE is a type of polyethylene with an extremely long molecular chain structure, typically reaching several million molecular weight units. This unique structure gives the material superior mechanical properties compared with conventional fibers, including high tensile strength, excellent abrasion resistance, and long service life.

 

Key Advantages of UHMWPE Material

 

UHMWPE fibers offer strength comparable to steel wire rope while being significantly lighter. This makes UHMWPE slings easier to handle, install, and transport, especially in large-capacity lifting operations.

Thanks to its dense molecular structure, UHMWPE performs very well in harsh working environments. It maintains stability under repeated loading, friction, and long-term use.

UHMWPE has low elongation under load, which helps improve lifting precision and operational safety, especially in heavy and oversized lifting projects.

Unlike steel products, UHMWPE does not rust and shows strong resistance to chemicals, moisture, and seawater, making it suitable for offshore, marine, and chemical industry applications.

The lightweight and flexible nature of UHMWPE slings reduces recoil risks in case of overload and minimizes damage to lifted objects, offering higher safety compared to traditional rigid lifting tools.

 

UHMWPE in Lifting and Rigging Applications

UHMWPE is widely used in:

• Heavy-duty lifting slings

• Large-capacity round slings

• Special lifting systems for wind power, offshore, and industrial projects

• Situations requiring reduced weight and improved handling efficiency

Its performance advantages make it particularly suitable for projects where safety, efficiency, and reliability are critical.

 

Quality Control and Standard Compliance

 

UHMWPE lifting products are typically manufactured in accordance with international and European standards. Strict material selection, controlled production processes, and load testing ensure stable performance and consistent quality for demanding applications.

With its outstanding strength, durability, and lightweight characteristics, UHMWPE has become an essential material in modern lifting and rigging solutions. It not only improves operational efficiency but also enhances safety and reliability across a wide range of industries.

[NANJING, CHINA – January 1, 2026] – As the calendar turns to 2026, Nanjing D.L.T Sling Co., Ltd. extends our warmest greetings and sincere gratitude to our valued partners, distributors, and clients across the globe.

Reflecting on our journey, which began in 1993, we have grown from a local manufacturer into a global leader in the lifting and cargo control industry. Over the past year, thanks to your trust, our Webbing Slings and Round Slings have been deployed in major infrastructure, logistics, and marine projects in over 40 countries.

A Commitment That Never Changes While 2026 brings new challenges and opportunities, our core mission remains steadfast: Safety is our life. Entering this new year, DLT Sling reaffirms its commitment to the highest standards of manufacturing excellence. We pledge to continue strictly adhering to ISO 9001:2015 quality management systems and ensuring our products meet and exceed CE, GS, and TUV safety standards. Whether it is EN1492-1 for Europe, ASME B30.9 for America, or AS1353 for Australia, our compliance is your peace of mind.

Looking Ahead: Innovation in 2026 This year, we are not just maintaining the status quo. We are investing in:

• Production Efficiency: To ensure faster lead times for your urgent orders.

• Product Development: Exploring stronger, more durable synthetic fibers for heavy-lift solutions.

• Customer Support: Enhancing our service to be your most reliable technical consultant.
  
  

To all our friends—old and new—may 2026 be a year of heavy lifting, not in burden, but in success and growth. We look forward to supporting your business and "lifting your dreams" to new heights.

Happy New Year 2026!

The DLT Sling Team

Lifting slings are essential tools in construction, manufacturing, logistics, and heavy industry. When used correctly, they ensure safe and efficient lifting operations. However, improper use of lifting slings is one of the most common causes of workplace accidents, equipment damage, and unexpected downtime.

1. Overloading the Lifting Sling

Using a lifting sling beyond its rated Working Load Limit (WLL) can lead to serious accidents. Always consider lifting angles, load weight, and dynamic forces.

How to avoid:

- Check the sling label for WLL

- Consider lifting angles

- Never guess the load weight

 

2. Using the Wrong Type of Sling

Choosing a sling based only on price instead of application can be dangerous.

How to avoid:

- Match sling material to the application

- Consult the manufacturer for special projects

 

3. Ignoring Sharp Edges and Abrasion

Sharp edges can quickly damage sling fibers.

How to avoid:

- Use protective sleeves

- Avoid direct contact with sharp edges

 

4. Using Damaged or Worn Slings

Damaged slings should never be used.

How to avoid:

- Inspect before every use

- Remove damaged slings immediately

 

5. Incorrect Sling Configuration

Poor configuration can cause imbalance and slipping.

How to avoid:

- Choose the correct lifting method

- Ensure load balance

 

6. Poor Storage and Handling

Improper storage reduces sling lifespan.

How to avoid:

- Store in clean, dry places

- Avoid chemicals and heat

 

7. Lack of Proper Training

Untrained operation increases risk.

How to avoid:

- Provide regular training

• Follow safety standards
• 

If you enjoy in water parks, especially large water parks, you will see there are always long lines to play large water slides. Like Vinterhal in Rulantica water park, the "shock wave" in Aquaventure World Atlantis Dubai, the Funnel Web in Jamberoo Action Park, World's first HIVE 35 family tower complex in Chimelong Water Park etc.

First of all, mostly they are the most thrilling game in the water park, so they are most popular atrractions in the park. But large water slides takes big area and large investment, so mostly the water park do not build many of them in one water park. And most of them need to devote more efforts to running safely, however, most of them have very limited capacity.

For example, in the incredible Funnel web in Jamberoo Action Park, you’ll drop at 30 km/h deep into the spider’s funnel, you will see the world's biggest spider sculpture just at the side of the tornado slide, you will get unique experience. The cloverleaf tube raft with seat pad from Guangdong H-Fun ensure your safety on the slide, but it can only take 4 players each time, so you need to wait if there are many palyers.

In Maya Playa water park of OCT group in Xi'an, larger water slide can use 5 person tube with seatpad from Guangdong H-Fun Water Recreational Articles Co., Ltd. which can take 5 players each time.

In the largest and longest family water coaster the "shock wave" in Aquaventure World Atlantis Dubai and World’s first HIVE 35 family tower complex with enormous Double TORNADO 60 in Chimelong Water park, the new design round raft with seperate seats from Guangdong H-Fun can provide safe and comfortable slide experience.

On the other hand, we usually take much less time to wait to play on racer slides, including mats racer slides and tube raft racing slides. They can allow more players to "race" at the same time and they are faster.

Like Phoenix fly in Adventure Bay water park in OCT group Xiangxiang, with 8 lanes of steel mat slide, and the tube racing slide in Zhejiang Longemont Waterpark, they provide 6 lanes of double tube racing slide, which can allow 12 players play at the same time, which can be rather thrill and save more time of waiting. Their racer mats and water park double tubes also provided by Guangdong H-Fun Water Recreational Articles Co., Ltd.

The breakthrough in rubber tree tissue culture technology is accelerating the upgrading of modern agriculture. The innovative technology from the Rubber Research Institute of the Chinese Academy of Tropical Agricultural Sciences, through somatic embryogenesis and cutting propagation, has achieved efficient propagation and quality improvement of rubber seedlings, injecting new vitality into the plant tissue culture industry.

 

However, plant tissue culture requires extremely high demands on the growth environment, necessitating highly clean laboratory conditions to ensure sterile growth. Traditional air purification equipment often fails to meet the stringent requirements for particle and microbial control, leading to increased contamination risks and affecting the survival rate and quality of tissue-cultured seedlings.

 

 

Therefore, the upgrading of air purification equipment has become crucial for the development of tissue culture technology.

 

With 20 years of accumulated experience in air purification technology, KLC, with its innovative technology and professional design, provides comprehensive clean environment support for rubber tree tissue culture technology. Together, they have built an efficient, intelligent, and easy-to-maintain air purification system, providing strong protection for the growth environment of plant tissue culture.

 

 

 Wide-Area Purification, Ensuring Sterile Growth 

KLC's HEPA air filters, with their excellent filtration performance, ensure that the air cleanliness of the tissue culture laboratory reaches ultra-high efficiency standards. Its high-efficiency filtration performance ensures that tissue-cultured seedlings grow under sterile conditions, reducing the risk of contamination. Continuous air purification covers the entire space, achieving seamless purification and providing stable support for all areas of the tissue culture laboratory, ensuring pollution-free operation throughout the tissue culture process and guaranteeing the continuous and stable operation of a large clean area.

 

 

 Air Shower Protection, Blocking Contamination Invasion 

KLC air shower pass-through windows are used for material transfer, ensuring that materials are air-showered before entering the laboratory to remove surface contaminants. This effectively prevents external contaminants from entering the laboratory through materials, protecting the growth environment of tissue-cultured seedlings.

 

 

 Horizontal Cleanliness, Protecting Sterile Operations 

Some plant tissue culture processes require highly clean bench to ensure sterility. KLC horizontal laminar flow bench provide a horizontal clean airflow, ensuring the air cleanliness of the work area. This provides a sterile working environment for operations such as inoculation and cultivation of rubber tree tissue-cultured seedlings.

 

 

 Laminar Flow Coverage, Precisely Guaranteeing Sterile Space 

Plant tissue culture requires extremely high cleanliness in localized operating areas, especially in some high-precision experimental operations. KLC laminar flow hoods, through their precise laminar flow design, provide a highly clean air environment for specific areas.

Their vertical or horizontal laminar airflow patterns effectively remove contaminants from localized areas, ensuring sterile conditions in critical operating zones. Whether for inoculation, cultivation, or other sensitive operations, KLC laminar flow hoods provide precise cleanliness assurance for tissue culture growth, facilitating the smooth progress of experimental procedures.

 

 

KLC's air purification solutions provide high-quality clean air for plant tissue culture technology and offer strong support for the development of modern agricultural technology. KLC is committed to providing customized air purification solutions for tissue culture laboratories, research institutions, and agricultural enterprises, helping to advance tissue culture technology.

The principles, methods, and results of air filtration applications in pharmaceutical and medical device manufacturing systems. In this sector, air filtration is a core element in ensuring product quality, safety, and regulatory compliance, far exceeding the importance of general industrial or residential environments.

 

 Why Use Air Filtration? 

In pharmaceutical and medical device manufacturing, the core principle of air filtration systems is strict contamination control. The goal is to create and maintain a controlled environment that meets specific cleanliness levels to prevent product contamination from various airborne sources.

 

 Specific principles and motivations include: 

 

Preventing microbial contamination: This is a critical goal, especially in the production of sterile pharmaceuticals (such as injectables and eye drops) and implantable/sterile medical devices. Airborne microorganisms such as bacteria, fungal spores, and viruses can cause product failure, lead to patient infection, or even be life-threatening if they land on product or contact surfaces. Air filtration (particularly HEPA/ULPA grades) is the primary means of removing airborne microorganisms and their carriers (such as dust particles).

 

Preventing Particulate Contamination: Non-viable particles in the air, such as dust, fibers, metal shavings, and skin flakes, are also serious contaminants for pharmaceuticals (especially injectables, which can cause blood vessel blockage) and precision medical devices (which can affect performance or trigger foreign body reactions in the body). High-efficiency filtration can keep the number of airborne particles to extremely low levels.

 

Preventing Cross-Contamination: In workshops producing different types of pharmaceuticals or active ingredients, air filtration helps coordinate airflow design to prevent powder or active ingredients from previous batches from spreading through the air and contaminating subsequent products.

 

 

 II. How is Air Filtration Implemented? 

 

Air filtration in pharmaceutical and medical device production is a complex and sophisticated systems engineering process, primarily manifesting in the following aspects:

 

 Cleanroom HVAC System: 

 

Core Support: Air filtration functions are primarily integrated into HVAC systems designed specifically for cleanrooms.

 

Multi-stage Filtration Strategy: Air handling units (AHUs) typically have multiple stages of filtration:

 

Pre-filter: Typically rated G4/MERV 8/ISO Coarse, removes large particles and protects the medium-efficiency filter.

 

Medium/High-Medium Filter: Typically rated F7-F9/MERV 13-15/ePM1, ePM2.5, further purifies the air and reduces the burden on the final HEPA filter.

 

Terminal Filtration: This is the most critical step in ensuring cleanroom quality. These filters are installed at the very end of the air supply system, directly supplying air into the cleanroom.

 

Filter Type: HEPA (High-Efficiency Particulate Air) filters (H13, H14) or ULPA (Ultra-Low Penetration Air) filters (U15 or higher) are commonly used. The specific cleanliness level to choose depends on the required cleanliness level of the area (for example, an ISO 8/GMP Grade D area might use H13, an ISO 7/GMP Grade C area uses H14, and an ISO 5/GMP Grade A/B core area must use H14 or higher, combined with unidirectional airflow).

 

 

 Installation Type: 

 

High-efficiency air inlets: HEPA/ULPA filters are installed in a custom-designed air inlet housing, with air delivered through diffusers (often used in areas with non-unidirectional airflow).

 

Fan filter units (FFUs): Fans and HEPA/ULPA filters are integrated into a modular unit. These units are densely mounted in the ceiling to create vertical, unidirectional (laminar) airflow over a large area. They are the primary method for achieving an ISO 5/GMP Grade A environment.

 

Airflow pattern: This works closely with filtration to control the direction of air flow to remove contaminants.

 

Unidirectional Flow (Laminar Flow): In critical operating areas (such as aseptic filling and areas directly exposed to product, corresponding to GMP Grade A), HEPA/ULPA-filtered air flows through the work area in uniform, parallel streams (typically vertically downward) at a specific velocity (e.g., 0.36-0.54 m/s). This quickly "blows away" generated particles and prevents them from settling above the product or on critical surfaces.

 

Non-Unidirectional Flow (Turbulent Flow): In areas with lower cleanliness requirements (such as GMP Grades C and D), filtered air is introduced through supply vents, mixed with room air to dilute contaminants, and exhausted through return vents. Maintaining cleanliness relies on a sufficiently high air changes per hour (ACH).

 

 Localized Protection & Containment Systems: 

 

Laminar Flow Hoods / Biological Safety Cabinets (BSCs): These provide a small, unidirectional, clean environment to protect products or personnel.

 

Isolators / Restricted Access Barrier Systems (RABS): These provide highly enclosed physical barriers, maintaining a GMP Grade A environment and separating personnel from the core aseptic processing area. They are a key technology in modern aseptic production, relying on HEPA/ULPA filtration for both internal air circulation and exchange with the external environment.

 

Exhaust Air Filtration: For operating rooms or equipment generating hazardous dusts (such as highly active pharmaceutical powders), aerosols, or biohazardous materials, exhaust air must be filtered through HEPA filtration (sometimes even two stages of HEPA) before discharge to protect personnel and the environment. A bag-in/bag-out (BIBO) filter replacement system is often used to ensure that operators do not come into contact with contaminated filters when replacing used filters.

 

 III. Application Outcomes (What are the Outcomes?) 

The successful application of air filtration systems in the pharmaceutical and medical device sectors is crucial:

Major Pros (Pros):

 

Ensuring Product Safety and Quality: Minimizing the risk of microbial and particulate contamination ensures the safety and effectiveness of finished drugs and medical devices, which is directly related to patient health and life.

 

Meeting Regulatory Compliance: This is a prerequisite for companies to obtain production licenses and market their products. Compliance with standards such as GMP and ISO 14644 is mandatory. Failure to comply can result in serious consequences such as warning letters, product recalls, production suspension, and even license revocation.

 

Improving Production Reliability and Consistency: A stable, clean production environment reduces process fluctuations and deviations caused by environmental factors, helping to ensure consistent quality between product batches.

 

Reduce Batch Rejection Due to Contamination: Effective contamination control significantly reduces the risk of products failing quality inspection due to microbial or particulate contamination, thereby mitigating significant economic losses.

 

Ensure Operator Safety: Exhaust air filtration and isolation technologies protect employee health in processes handling highly active or toxic substances.

 

Improve Corporate Reputation and Market Competitiveness: Strict adherence to high-standard production practices is the cornerstone of the credibility of pharmaceutical and medical device companies.

 

 Summary: 

Air filtration plays an absolutely core role in pharmaceutical and medical device manufacturing. It is a cornerstone technology for ensuring product sterility and the absence of particulate contamination, thereby safeguarding patient safety and meeting regulatory requirements. Its application is highly systematic and sophisticated, closely integrated with HVAC systems, air flow management, and isolation technologies. While costly and maintenance-intensive, the resulting product safety, regulatory compliance, and production reliability are fundamental to the survival and growth of this industry.

The production environment for semiconductor devices is extremely sensitive to the presence of contaminants. Even small amounts of gaseous or particulate contaminants can reduce product quality. Therefore, cleanliness requirements in semiconductor device manufacturing are far higher than in other industries.

 

 

Throughout the entire chip and semiconductor device manufacturing process, process environment contamination control is crucial. The air cleanliness of core processes needs to meet ISO Class 1 standards, with gaseous molecular contaminant (AMC) concentrations below one part per billion. Substandard process environments can lead to a significant reduction in product yield.

 

Ordinary air contains a large number of particulate contaminants such as microparticles and dust, as well as gaseous contaminants such as sulfur dioxide, nitrogen oxides, and ammoniaaa. Only after treatment can it enter a cleanroom. Because cleanrooms used for producing semiconductors and other microelectronic devices must maintain standard cleanliness levels 24/7, the cleanroom air conditioning system (including the exhaust system), its associated heat and cold sources, and corresponding delivery systems must operate 24 hours a day, which is significantly different from other conventional air conditioning systems.

 

As the power source, the fan consumes most of its energy due to the combined resistance of its components. Furthermore, the air filter's resistance accounts for approximately 50% of the fan's total head. Therefore, reducing the energy consumption of air conditioning filters is crucial for lowering building energy consumption and carbon emissions. From the perspective of improving energy efficiency and reducing energy consumption, optimizing air filter performance without compromising filtration requirements is essential.

 

 

Filter energy consumption is directly determined by average resistance and is related to initial resistance and dust holding capacity. Reducing initial resistance, increasing dust holding capacity, and minimizing the increase in resistance during dust holding are effective ways to reduce energy consumption, thus lowering energy costs for customers and contributing to environmental protection.

Cleanrooms place stringent requirements on ventilation systems. They must provide sufficient airflow and pressure while precisely controlling temperature and humidity, ensuring consistent air quality. These requirements apply to various airflow patterns and room sizes.

 

Many production processes mandate cleanroom conditions because cleanrooms, and even ultra-cleanrooms, guarantee the environmental quality of products during rigorous manufacturing. Even minute impurities in the air can adversely affect production processes, leading to high scrap rates. For example, production environments in fields such as optics and lasers, aerospace, biosciences, medical research and treatment, food and pharmaceutical production, and nanotechnology require a near 100% dust-free and bacteria-free air supply.

 

However, air conditioning and ventilation systems in cleanrooms consume significant amounts of energy due to high air exchange rates, making energy efficiency and cost critical issues. Therefore, in addition to meeting aerodynamic performance requirements, fans must also meet key standards such as compact size, low noise, use cleanroom-compatible materials, proper control capabilities, networking capabilities, and energy-efficient operation.

 

FFU are designed specifically to address these needs. They effectively improve ventilation in cleanrooms, ensuring the stability of the production environment and product quality.

 

 

An FFU is a device that cleverly combines a filtration system with a fan. It features a ceiling-mounted design, is compact and efficient, and requires minimal installation space. The FFU contains pre-filters and high-efficiency filters. Air is drawn in from the top by the fan, finely filtered, and then uniformly delivered at a velocity of 0.45 m/s ± 20%.

 

FFU play a crucial role in cleanrooms, clean benches, clean production lines, modular cleanrooms, and localized Class 100 environments. These applications span semiconductor, electronics, flat panel display, and disk drive manufacturing, as well as optics, biomedicine, and precision manufacturing—industries with stringent requirements for air pollution control.

 

The flexibility and ease of use of FFU: The self-powered, modular design of the FFU makes replacement, installation, and relocation simple and easy. Its matching filters are easy to replace, not limited by location, and ideal for the zoned control needs of cleanrooms. FFU can be easily replaced or moved to adapt to different clean environments as needed. Furthermore, FFU can be used to easily create simple clean benches, clean booths, clean pass-through cabinets, and clean storage cabinets to meet various cleanliness requirements. Its ceiling-mounted installation method, especially in large cleanrooms, significantly reduces construction costs.

 

Negative Pressure Ventilation Technology: The unique negative pressure ventilation design of the FFU fan filter unit allows it to easily achieve high-level cleanliness in various environments. Its self-powered characteristic maintains positive pressure inside the cleanroom, effectively preventing the infiltration of external particles and ensuring a safe and convenient seal.

 

Quiet Operation: The FFU fan filter unit boasts excellent quiet operation, maintaining low noise even during prolonged use. Its vibration is very low, ensuring smooth stepless speed regulation and uniform airflow distribution, providing stable support for the clean environment.

 

 Cleanroom Air Supply Units 

 

* Rapid Construction: Utilizing FFU technology, there is no need for ductwork fabrication and installation, significantly shortening the construction cycle.

 

* Reduced Operating Costs: Supplying clean air to cleanrooms with FFU technology is not only economical but also remarkably energy-efficient. Although the initial investment for FFU may be slightly higher than ducted ventilation, their maintenance-free operation over the long term significantly reduces overall operating costs.

 

* Space Saving: Compared to other systems, FFU systems occupy less floor height within the plenum chamber and take up virtually no space within the cleanroom.

 

* Wide Applicability: FFU systems can adapt to cleanrooms and microenvironments of varying sizes and cleanliness requirements, providing high-quality clean air. During the construction or renovation of cleanrooms, it not only improves cleanliness but also effectively reduces noise and vibration.

 

FFU System Applications in Semiconductor Wafer Shops: FFU systems are widely used in cleanrooms requiring ISO 1-4 air purification levels, playing a crucial role, particularly in the vertical laminar flow operations of semiconductor wafer shops. In the technical mezzanine, air is efficiently delivered to the clean production layer via FFU. This airflow then passes through raised floors and waffle slab openings, reaching the clean lower technical mezzanine. Finally, after being processed by DCC (Dry Cooling Coils) in the return air duct, the air returns to the upper technical mezzanine, forming a cycle. This design effectively supports the wafer fabrication workshop's stringent control over the production environment, including temperature, humidity, cleanliness, and vibration damping.

 

Furthermore, the application of FFU systems in biological laboratories is also significant. When laboratory personnel handle pathogenic microorganisms, experimental materials containing pathogenic microorganisms, or parasites, FFU systems impose special requirements on laboratory design and construction to ensure experimental safety and a pollution-free environment.

 

Current laboratory purification systems typically consist of multiple parts, including a static pressure layer, a process layer, a process auxiliary layer, and a return air duct. This system primarily relies on FFU to process the air. Its working principle is: the FFU provide the necessary circulation power, mixing fresh air with recirculated air, which is then delivered to the process layer and process auxiliary layer after passing through ultra-high efficiency filters. At the same time, by maintaining a negative pressure state between the static pressure layer and the process layer, the leakage of harmful substances is effectively prevented, ensuring the cleanliness and safety of the laboratory environment.

The Battery Show and Electric & Hybrid Vehicle Technology Expo 2025, a highly anticipated annual event for the global new energy industry, was successfully held in the United States on October 9th. As a leading company in air filtration and cleanroom solutions, KLC participated in the exhibition, showcasing cutting-edge technology, professional solutions, and in-depth industry insights. We worked with global customers and partners to successfully demonstrate our key value in supporting the electric vehicle and battery manufacturing supply chain.

 

High-precision battery workshop air filters: We showcased HEPA/ULPA high-efficiency filters for controlling the battery production environment. These products effectively remove fine dust and metal particles from the air, ensuring extremely clean battery production, and guaranteeing consistent and safe battery performance from the source, attracting significant attention from battery manufacturers.

 

 

 Professional Exchanges, Insights into the Industry 

The KLC booth was bustling with visitors throughout the exhibition. We engaged in hundreds of high-quality, in-depth discussions with representatives from battery manufacturers, electric vehicle OEMs, component suppliers, and research institutions from North America and around the world.

 

 

This exhibition was not only a successful brand showcase, but also a valuable journey of learning and insight. We deeply feel that with the rapid development of the electric vehicle industry and the continuous iteration of battery technology, the requirements for "purity" and "precision control" in the production environment are becoming more stringent than ever before.

 

 

KLC will use this exhibition as a new starting point to continuously increase R&D investment and continuously optimize our products and technologies, striving to provide safer, more efficient, and more economical air filtration and cleanroom solutions for the global new energy industry chain. We look forward to transforming the sparks generated during the exhibition into fruitful future collaborations and working with industry colleagues to contribute the "pure power of KLC" to driving the future of green mobility.

Air filters are filtration-based air purifiers. The HEPA filter we often hear about stands for High-efficiency Particulate Air Filter.

 

Let's break down the five core principles of air filtration to help you understand its underlying logic.

 

 

1. Interception Effect: The fibers in a filter are intricately arranged. When airborne dust particles come into contact with the surface of the filter fibers, they are directly trapped if the particle is close enough to the filter material. This phenomenon is particularly evident in dense filter materials, such as the three-dimensional mesh structure formed by ultra-fine fibers in meltblown fabric for masks, which can firmly lock viral aerosols within the fiber gaps.

 

2. Inertial Effect: The complex arrangement of filter fibers in an air filter causes airflow to encounter obstacles and deflect as it passes through the filter material. Dust particles in the air, under the influence of inertial forces, break away from the streamline and collide with the surface of the filter fibers, depositing there. The larger the particle, the greater the inertial force, the greater the likelihood of it being blocked by the filter fibers, and the better the filtration efficiency.

 

3. Diffusion Effect: The diffusion effect targets ultrafine particles smaller than 0.1 micrometers. Particles smaller than 0.1 micrometers primarily undergo Brownian motion, exhibiting a disordered trajectory, significantly increasing the probability of contact with filter fibers; the smaller the particle, the easier it is to remove.

 

4. Gravity Effect: When the airflow velocity is lower than the particle settling velocity, larger particles naturally settle under gravity. Flue gas treatment towers in thermal power plants expand the space and reduce the flow velocity, allowing dust to fall into the dust collection hopper like sand settling to the bottom of water. This mechanism is economical and efficient for treating high concentrations of dust, but its effect on suspended particles is limited, and it is usually used as a pretreatment method.

 

5. Electrostatic Effect: Electrostatic electret technology charges the fibers, giving the filter material the ability to actively capture particles with opposite charges, much like a magnet attracts iron filings. This mechanism is particularly effective for charged particles in PM2.5, and industrial dust removal equipment performs electret treatment on the filter surface.