What is the testing standard for smooth pc films (thin film optical panels)

Today, I would like to share with you the knowledge of what the glossy pc thin film testing standard is. It will also explain the thin film optical panels. If you can happen to solve the problem you are facing now, don't forget to pay attention to this site, let's start now!

List of contents for this article:

• 1、pc film quality requirements
• 2、What are the general haze requirements for optical films
• 3、Film flame retardant test standard
• 4、Polycarbonate testing standards and testing content
• 5、What are the main performance indicators of PC films
• 6、Characteristics and uses of polycarbonate PC film

pc film quality requirements

Advantages of PC films are stable in mechanical properties: they maintain stable mechanical properties over a wide temperature range (-60℃ to 120℃) and adapt to extreme environments. Excellent processing performance: The resin melt has high viscosity and high rigidity. It is suitable for injection molding, extrusion and other molding processes, and the product precision is high. Safe and environmentally friendly: resistant to steam, cleaning agents, and radiation disinfection, without degradation in physical properties, and in line with medical-grade environmental protection requirements.

PC film shaping temperature The material extrusion temperature during the processing process is relatively high. If the cooling speed is too fast, it will inevitably cause stress concentration within the film, resulting in surface wrinkling and unequal defects. An appropriate cooling gradient must be present to obtain high-quality films. The shaping temperature mainly refers to the indicated temperature of the shaping roller, and the process conditions of the entire cooling process are strictly and accurately required. Stable setting conditions should be the unity of extrusion speed, oil temperature and traction speed.

PC film has good physical properties and flame retardancy: reaching UL94-V2 level, which can effectively prevent the spread of fire and improve safety when a fire occurs. Good insulation: It belongs to Class E insulating material and can be used for occasions where electrical insulation is needed to ensure the normal operation of electrical equipment. High transmittance: The transmittance of colorless sheets can reach 90%, which is close to the transmittance effect of glass, and can meet application scenarios with high requirements for transmittance.

In order to meet the requirements for film antistatic, slippery, anti-aging, flame retardant, and anti-scratch properties in protective hoods and other fields, PC properties need to be optimized through blending modification technology.

EFP10BPC film is not a miscellaneous brand. It is a functional film product with certain industry popularity. It is used in electronics, packaging and other fields, and its quality and performance are recognized in the industry. Brand attributes and industry positioning 1) Brand background: EFP10BPC is a specific model of functional film. Most of the production companies are professional manufacturers focusing on the research and development of polymer materials. They have stable production technology and quality control systems, and are not unqualified small workshop products.

Lightweight exterior trim parts: PC is used for local exterior trim parts such as spoilers and charging caps. It needs to meet weather resistance, impact resistance and surface quality requirements. Cost is the main obstacle, but there are opportunities for high-end models. Fluid channels for integrated thermal management systems: Exploring the integration of PC coolant channels in the lower casing or frame of the battery pack to replace metal pipes requires solving long-term coolant resistance and sealing issues.

What are the general haze requirements for optical films

1. There is no unified standard for the haze requirements of optical films, which depends entirely on their specific type and application scenarios. The haze indicators of films of different materials and products of different uses vary greatly.

2. Secondly, the haze must be strictly controlled to ensure light uniformity. For example, the haze of MLCC release films should not exceed 0.7%, and the haze of optical grade blue films should be ≤25%. In addition, the surface roughness needs to be extremely low. For example, the surface roughness Ra value of optical grade PET base films requires ≤1nm, and the optical grade blue films requires Ra≤0.05μm, which provides an ideal for subsequent application of high-precision optical coatings. Smooth surface.

3. The C light source is the standard lighting source specified by the CIE. There are obvious differences in the haze range of different transparent or translucent materials under the C light source. The haze of optically transparent plastic films is usually between 0.1% and 3%. Such films have high optical performance requirements, such as PET optical films. If the haze exceeds this range, it will reduce the transparency and affect its application in optical equipment such as display screens and lens protective films.

4. Thin film materials with light transmittance ≥92%, low haze, super mechanical properties and multiple functional coatings are widely used in display, optics, new energy and other fields, and are the "invisible king" that promotes technological upgrading in related industries. Core performance analysis Optical performance transmittance ≥92%: ordinary glass transmittance is about 85%, high-end PET base film can reach 94%(such as reflective film), blue light filtering protective film has higher transmittance, ensuring true screen color restoration.

5. Ultra-low haze (≤0.3%): To meet the needs of high-end display fields, only a few foreign companies can achieve it.

Film flame retardant test standard

in additionWhat is the testing standard for smooth pc filmsThe UL 94 standard is also commonly used for film flame retardant testingWhat is the testing standard for smooth pc filmsIf the material thickness is less than 0.025mm, it is recommended to do a VTM thin plate vertical combustion testWhat is the testing standard for smooth pc films; If the thickness is between 0.025 - 0.25mm, you need to evaluate and choose between VTM and V.

Test Method 1 StandardWhat is the testing standard for smooth pc films: The residual flame time is less than 0 seconds, the charring length is less than 5 inches, and the sample will not continue to burn after reaching the floor of the test room. Test Method 2 applies to fabrics with a density greater than 21 ounces/square yard, including blackout linings, awnings, etc. Test 2 used a large size sample to simulate a fire environment and measure the response within 2 minutes. Standards include afterflame time, carbonization length, and average residual flame time.

Directly determine the test grade based on the thickness of the film and the thickness is less than 0.025mmWhat is the testing standard for smooth pc films: Directly select VTM level thin plate vertical combustion test. Because the material is too thin, the 20mm vertical burning conditions of conventional V-level tests (such as V-0, V-V-2) cannot accurately evaluate its flame retardant properties. VTM level adjusts parameters such as sample size and ignition time to better suit the actual burning behavior of thin materials.

Polycarbonate testing standards and testing content

The GB/T 35512-2017 standard stipulates a number of test items and corresponding test standards for polycarbonate (PC) molding and extrusion materials, covering key indicators such as mechanical properties, thermal properties, combustion properties, electrical properties and physical properties. Specific test items and standards are as follows: Mechanical properties Melt volume flow rate: Tested according to GB/T 3682, it reflects the flow ability of the material in the molten state and affects processing properties.

The GB/T 44570-2024 standard stipulates the testing items for polycarbonate boards, covering weather resistant protective layer, appearance, color, size, tensile properties, impact strength, thermal properties, optical properties, weather resistance and fire resistance. The specific test items and instructions are as follows: Weather-resistant protective layer tests the performance of the weather-resistant protective layer on the surface of the polycarbonate board, evaluates its ability to resist ultraviolet rays and aging to ensure that the board maintains stability during long-term outdoor use.

Glass transition temperature: The test standard is GB/T 19462. The glass transition temperature is an important indicator to measure the thermal properties of polycarbonate materials and affects its use temperature range. Odor level: Conduct testing in accordance with GB/T 40001 to evaluate the odor of polycarbonate PC plastic to ensure that it will not produce an uncomfortable odor during use.

The test items of the ISO 11963-2019 standard for polycarbonate plastic sheets cover many aspects such as mechanics, heat, optics, electricity, and aging properties. The specific test items and corresponding standards are as follows: Mechanical properties test Tensile yield stress: The test standard is ISO 527-2, which is used to evaluate the stress value when the material begins to produce obvious plastic deformation during the stretching process, reflecting the yield strength characteristics of the material.

The viscosity core of polycarbonate is determined by its molecular weight and is usually characterized in the industry by melt volume flow rate (MVR) or melt index (MFI). Different application scenarios correspond to different viscosity ranges.

What are the main performance indicators of PC films

1. Characteristics and physical properties of PC film Flame retardancy: It meets the UL94-V2 flame retardant standard and is a self-extinguishing material. It will automatically extinguish after leaving the fire source, making it highly safe. Insulation: It belongs to Class E insulating material with stable electrical properties and is suitable for use in the electronic and electrical fields. Light transmittance: The light transmittance of colorless sheets is as high as 90%, which is close to the transparency of glass, and is stable to light (not resistant to ultraviolet light).

2. Main characteristics: High transparency: The transparent PC film has a very high transparency, reaching more than 90%, allowing light to pass through and maintain clarity. Good heat resistance: Transparent PC films have good heat resistance and can maintain their properties unchanged at high temperatures. Good weather resistance: Transparent PC films can be used for a long time in harsh environments, such as strong ultraviolet rays and high temperature environments.

3. PC films used in the automobile manufacturing industry have good impact resistance and thermal distortion resistance, good weather resistance and high hardness. It is suitable for the production of various parts and components for cars and light trucks, mainly concentrated in lighting systems, instrument panels, heating panels, defroster and bumpers made of polycarbonate alloy, which can improve the safety and durability of cars.

Characteristics and uses of polycarbonate PC film

1. Polycarbonate (PC) films have the characteristics of high light transmittance, heat and cold resistance, strong impact resistance, insulation and flame retardant, and size stability. They are widely used in building materials, automobile manufacturing, medical equipment and packaging. Characteristics, physical properties, flame retardancy: It meets the UL94-V2 flame retardant standard, belongs to a self-extinguishing material, and automatically extinguishes after leaving the fire source, with high safety. Insulation: It belongs to Class E insulating material with stable electrical properties and is suitable for use in the electronic and electrical fields.

2.Polycarbonate film is a material with excellent properties, with the characteristics of size stability, ultraviolet light resistance, excellent toughness, high strength, and difficulty in tearing and damage. It is easy to bond, print, and has good formability. It is widely used in screen printing of various signs, and is suitable for processing methods such as IMD, blister forming, laminating, and lamination.

3. Polycarbonate (PC) films were first developed by Bayer Company of Germany. Later, chemical companies in the United States, Japan and other countries also produced them one after another and developed them into China. Make this product an eye-catching film variety. PC films have good comprehensive properties. Ordinary PC films are colorless and transparent, with a light transmittance of more than 90%, making them very suitable as optical film materials.

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