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4LW Ultra-Low Pressure Type – Pressure Measurement Film Specifications and Pressure Reference Chart

2023-07-15

The 4LW pressure measurement film is a micro-pressure type film, distinct from other models in both structure and packaging. Because it is designed for extremely low-pressure applications, the 4LW film features a larger core and box size. To prevent unwanted creasing or pressure marks when rolled, both edges are separated with isolation layers, resulting in a bulkier appearance when packaged. Let’s take a look at the pressure range and film dimensions for the LLLLW model: Pressure Measurement Range: 0.05 MPa – 0.2 MPa Film Dimensions: 320 mm × 3 m As you can see, the 4LW film covers a very narrow pressure range. From LW to 2LW, 3LW, and finally 4LW, the measurement ranges decrease progressively and seamlessly overlap, ensuring complete coverage from 0.05 MPa to 10 MPa. Users can easily choose the appropriate type according to their target pressure range. Pressure Distribution and Measurement Method

Ultra-Low Pressure Type Prescale Film LLLW (3LW Pressure Measurement Film)

2023-07-15

This article introduces the LLLW Prescale Film, also known as the 3LW Pressure Measurement Film. Both names refer to the same product model. The LLLW (3LW) Prescale Film is a super ultra-low pressure, two-sheet type pressure measurement film designed for precise and sensitive contact pressure visualization. Pressure Range: 0.2 MPa – 0.6 MPa Film Dimensions: 270 mm × 5 m These two specifications summarize the product clearly. In most cases, the LLLW type is commonly referred to as 3LW, as this naming convention is easier to distinguish and reduces the chance of confusion in communication or documentation. The 3LW Prescale Film is widely used in the optoelectronic and smartphone manufacturing industries. As new product designs emerge, the performance requirements for the 3LW type have become increasingly stringent. For example, many modern applications now require the film to withstand operating temperatures exceeding 200°C. Usage Precautions During Pressure Application: The L film is highly sensitive and reacts to even slight pressure. Handle carefully before use — do not press, rub, or fold the film. The color-developing microcapsules inside may adhere to the skin; prolonged contact may cause skin irritation in sensitive users. It is recommended to wear gloves during handling. Recommended working environment: 20°C–35°C, 35%RH–80%RH. Operating outside these conditions may affect measurement accuracy. The developed color intensity of the K film may vary depending on temperature, humidity, and applied pressure conditions. If the coated surfaces of the L or K film are contaminated with water, oil, or other substances, color development may fail. Ensure the test area is clean before use. In high-temperature, long-duration pressing, add insulating material on the film’s outer side to prevent heat impact. In wet or oily environments, seal the sample in a waterproof and oilproof bag before pressing to prevent direct contact and color interference. Used Prescale...

LLW Pressure Measurement Film – Pressure Reference Chart (2LW Introduction)

2023-07-15

The LLW pressure measurement film is essentially the same as 2LW film — using numbers makes it easier to distinguish between different types. Today, we’ll explain what 2LW film actually means. Since many users inquire about the LLW reference chart, it essentially reflects the pressure range of the film. Here, we also provide the dimensions for clarity: Film Dimensions: 270 mm × 6 m Pressure Range: 0.5 MPa – 2.5 MPa With just these two pieces of information, the product is easy to understand. The figure above shows the basic specifications of LLW film — simply remembering this chart is sufficient, as it represents the 2LW introduction. Pressure Distribution and Measurement Method

What Does LW Low-Pressure Type Pressure Measurement Film Mean? (Dimensions: 270 mm × 10 m)

2023-07-15

Many users may not fully understand what LW pressure measurement film refers to. In fact, its structure is not complicated. Today, we will provide a brief introduction. LW film is a specific model of pressure measurement film. Each box contains two rolls, with dimensions of 270 mm × 10 m. Its pressure measurement range is 2.5 MPa – 10 MPa, classifying it as a low-pressure type. This model is defined by its dimensions and pressure range. As long as these two specifications are correct, it will meet application requirements. Understanding this product is simple — knowing these key points is sufficient. As shown in the image above, the figure clearly illustrates the LW model. Users can easily distinguish the film type during usage by these specifications. When unboxing, the package label displays these details, allowing users to confirm the model by comparison. For those unfamiliar with product codes, the easiest way to distinguish models is by pressure range. As long as the product matches the required pressure range for your application, it will be suitable. This concludes the introduction to the LW pressure measurement film model.

Introduction to 2LW Pressure Test Film – LLW Pressure-Sensitive Paper Comparison Table

2022-04-24

Some friends have inquired about the LLW model of pressure-sensitive paper. In fact, LLW is the same as 2LW, which is just another way of referring to the same standard model. The official model is LLW, commonly called 2LW or 2L. When asking about the LLW comparison table, it essentially refers to the pressure testing range—that is, the range of pressures this model can measure. The model of pressure-sensitive paper is determined based on this testing range. Pressure testing range of LLW (2LW) pressure-sensitive paper:0.5 MPa – 2.5 MPa This means that any measurement within this pressure range can use this model of test film. Pressures above or below this range are not suitable. The specific products that can be tested are numerous, so they are not individually listed—just use the pressure range as the guide. In short, when selecting pressure-sensitive paper for testing, first check the pressure range of your product, and then choose the corresponding model—this will ensure proper measurement. Features of LLW Pressure-Sensitive Paper: Convenient and intuitive way to check the distribution and uniformity of applied pressure. Different color densities correspond to different applied pressure values; the pressure value can be determined using the standard pressure-density curve. Fast measurement with clear, direct visualization of the pressure pattern after application. Standard Pressurization Conditions: Continuous Pressure: Gradually increase the pressure over 5 seconds to the set value and maintain for 2 minutes. Instantaneous Pressure: Gradually increase the pressure over 5 seconds to the set value and maintain for 5 seconds. This concludes the introduction to the LLW (2LW) pressure-sensitive paper.

Domestic Pressure-Sensitive Films Gradually Become Industry Export Leaders

2022-03-25

In recent years, domestic pressure-sensitive films have gained significant momentum. China’s development in pressure-sensitive films started relatively late, and for a long time, the market was dominated by imported pressure-sensitive paper brands. Since the launch of Hangkai Pressure-Sensitive Films, the absence of domestic brands in this field has finally come to an end. Through continuous market cultivation and research, Chinese companies have steadily mastered the production technology of pressure-sensitive films, leading to the emergence of new domestic manufacturers. After a period of dormancy, multiple domestic enterprises now offer pressure-sensitive film products, gradually establishing a robust domestic industry. Domestic Pressure-Sensitive Films Technological breakthroughs form the foundation of the rapid advancement of domestic pressure-sensitive films. Some new products have achieved exceptional color density performance, in some cases surpassing imported brands—a testament to the dedication of researchers and engineers. During the 2022 Shanghai pandemic, many industries experienced disruptions. Yet international inquiries for pressure-sensitive films continued, and in some cases, even increased. This demonstrates that domestic pressure-sensitive films have matured into a viable industry and are beginning to expand globally. Currently, domestic pressure-sensitive film brands are still limited in number, and product performance has room for improvement. However, it is expected that in the near future, Chinese pressure-sensitive films will become mainstream in the industry, reaching global standards and serving markets worldwide.

Understanding the Difference Between 3LW and 4LW Pressure-Sensitive Films

2022-03-25

Recently, a customer asked about the difference between 3LW and 4LW pressure-sensitive films. In fact, this is mainly a matter of model numbers, which correspond to different pressure measurement ranges. Here’s a detailed explanation: Different Pressure Ranges Different Dimensions In practice, the main factor for selecting a pressure-sensitive film is the pressure measurement range. The different model numbers, such as 3LW and 4LW, indicate their specific pressure ranges—3LW for ultra-low pressure and 4LW for micro-pressure applications.

Shipping Notice: Delays Due to Pandemic Control Measures

2022-03-25

Recently, as COVID-19 prevention measures have intensified in various regions, some local courier services are temporarily limited. We kindly ask for your patience during this period. To reduce the risk of virus transmission, all logistics and shipments undergo strict disinfection. In cities experiencing more severe outbreaks, regional control measures may further affect delivery times. Saiyang Pressure-Sensitive Film is committed to arranging shipments as quickly as possible despite these challenges. You can rest assured that our supply capacity remains strong. Even under uncontrollable circumstances, we maintain a proactive approach to ensure continuous delivery of our pressure-sensitive film products. Challenging times highlight the quality of service a company provides. Our Saiyon team remains dedicated to keeping your supply smooth and reliable. Together, we can overcome difficulties.We wish for the swift and successful control of the pandemic in our country.

Instructions for Using Pressure Test Film

2022-03-25

Prepare the L-Sheet Cut the L-sheet (from the black bag, coating side inward) into the desired shape. Prepare the K-Sheet Cut the K-sheet (from the blue bag, coating side outward) into the desired shape. Assemble the Test Film Place the L-sheet and K-sheet together with their coated sides facing each other gently. Insert the Test Film Insert the assembled pressure test film between the surfaces where pressure measurement is required. Observe the Developed K-Sheet After testing, remove the pressure test film. Place the developed K-sheet with the smooth PET side facing up on a white sheet of paper. Observe in a well-lit area. By visually inspecting the color density and uniformity, the pressure distribution can be determined. For quantitative pressure measurement, refer to the standard pressure-density curve to determine the pressure value. Standard Pressurization Conditions for Pressure Test Film Sustained Pressure Gradually increase the applied pressure. Reach the target pressure in 2 minutes, and maintain the pressure for 2 minutes. Instantaneous Pressure Gradually increase the applied pressure. Reach the target pressure in 5 seconds, and maintain the pressure for 5 seconds.

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4LW Ultra-Low Pressure Type – Pressure Measurement Film Specifications and Pressure Reference Chart

Ultra-Low Pressure Type Prescale Film LLLW (3LW Pressure Measurement Film)

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