Shenzhen Manufacturer Biological Instruments PVC Panel, Film Panel

Shenzhen Wangrongxin Technology Co., Ltd. is a company specializing in the design and production of薄膜开关、薄膜面板、PVC面贴、EL背光源。该公司拥有先进的设备与完整的制造流程的生产平台，以及一支强大的专业技术团队。其产品广泛应用于家用电器、工业控制、仪器仪表、通信、医疗设备等领域。

The company adheres to the service philosophy of "quality first, affordable prices, and customer service above all else," and has been committed to the manufacturing of high-precision, high-quality products. The company employs skilled production technicians, and the core members of the entrepreneurial team are professionals with nearly 10 years of experience in the industry, possessing excellent quality management expertise. With strong technical support and comprehensive quality assurance,The company implements ISO9001 quality management systems, strictly controls the production process, and conducts thorough testing and inspection of finished products, thereby ensuring the interests of our customers and meeting their exceptional demands. We have the capability to mass-produce various series of film switches and film panels.

"One effort, one reward." After years of development, the company's strength has continued to grow. Currently, the company has more than 50 technical personnel in management, sales, engineering technology, and production. With a monthly production capacity of 100,000 units, our products have successfully entered markets such as the European Union, the United States, and Southeast Asia.

Our company will strive to provide customers with high-performance and high-quality products, with first-class quality and excellent service. We sincerely serve every customer!

Welcome friends to contact and consult!

Types of Film Switch Materials

Polyvinyl chloride (PVC) at 60°C has a melting point of 0.175~0.5°C. It has a smooth appearance and is stable against acids, alkalis, and salts at normal temperatures. It possesses good wear resistance, self-extinguishing properties when flammable, and provides sound absorption and shock resistance. Additionally, it has excellent electrical insulation properties. However, its thermal stability is relatively poor. It is commonly used for low-cost signs and panels.

Polycarbonate PC-60~120℃, 0.175~1.0, has a high light transmittance, low water absorption, good dimensional stability, and superior bending, tensile, and compressive strength. It also exhibits excellent heat resistance, cold resistance, electrical insulation, and resistance to atmospheric aging. However, it has poor chemical resistance and fatigue resistance, making it prone to stress cracking. The output interface terminals are typically made of carbon material and printed, without aprotective coating. Over time, they may oxidize and develop a coating that eventually leads to circuit breakage, resulting in a shortened lifespan. This is a common failure point for薄膜开关, mainly due to environmental factors. Regardless of whether it is in use or not, the time of physical damage is typically 3-10 years. PC-60~120℃ is the most widely applicable material, as it can meet the requirements of most薄膜开关面板. In particular, the high light transmittance of PC with a smooth surface can meetThe requirements of LCD display windows.

Sand-faced polyester (PET) has good chemical resistance at temperatures ranging from 30 to 120°C, and it is opaque. It is insoluble in most organic solvents and not resistant to alkalis. PET possesses excellent mechanical properties, electrical properties, rigidity, hardness, and the highest toughness among thermoplastic materials. It has low water absorption, excellent wear and friction resistance, and high dimensional stability. Its tensile strength is comparable to that of aluminum film.Significantly higher than PC and PVC. However, due to the difficulty in processing the surface into a matte finish, textured PET is more expensive. It is the ideal base material for manufacturing film switch circuits. Textured PET is suitable for products that require high surface quality or have liquid crystal display windows.

Material thickness:

Plastic substrates with a thickness of 0.25mm or less are referred to as films. They are primarily used as the panel layer for film switches. The back of the film is printed with various indicative patterns and text to indicate the operating areas of the corresponding switch positions. The thickness of the film should be determined based on the size of the panel and the buttons. A thicker material provides greater tactile feedback, but the response may be slower. On the other hand, if theThe material is too thin, resulting in a poor touch sensation and an insignificant rebound effect. Substrates with a thickness of 0.25mm or more are referred to as sheets. They are not suitable for three-dimensional button molding. They can be used as indicator panels for areas without buttons, or as backing for film switches to enhance their hardness.

Line layer printing material:

The base material for manufacturing circuits should be polyester (polyphthalamide) film (abbreviated as PET). It has excellent insulation and heat resistance, as well as high mechanical strength, transparency, and airtightness. It is particularly resistant to bending and has high elasticity, making it an ideal material for manufacturing film switch circuits.

Technical parameters of the membrane switch

Electrical Properties of Membrane Switches
Working Voltage: ≤50VDC;
Working Current: ≤100mA;
Contact Resistance: 0.5~10Ω;
Insulation Resistance: ≥100MΩ;
Substrate pressure resistance: 2kDVC;
Eject time: ≤6ms;
Loop Resistance: Three levels available at 50Ω, 150Ω, 350Ω, or as determined by the user's needs;
Insulated ink withstand voltage: 100VDC.
Mechanical Properties of Membrane Switches
Reliability and Service Life: Over 1 million cycles;
Closure displacement: 0.1~0.4mm (no tactile sensation), 0.4~1.0mm;
Force range: 15~750g;
Silver Paste Migration: At 55°C and 90% humidity, after 56 hours, the resistance between the two lines is 10MΩ/50VDC;
There are no oxidations or impurities on the silver paste line;
The width of the silver paste line is ≥0.3mm, the minimum spacing is 0.3mm, the edge roughness of the line is <1/3, and the gap in the line is <1/4 of the line width;
Pin pitch standards: 2.54, 2.50, 1.27, 1.25mm;
The lead wire has a resistance to bending, using a steel with a diameter of 10mm. The wire can withstand 80 pressings without breaking.
Environmental Performance of Membrane Switches
Operating Temperature: -20°C to +70°C;
Storage Temperature: -40°C to +85°C with a temperature range of 95%±5%;
Atmospheric pressure: 86～106KPa.
Printing Indicators for Thin Film Switches
Printing size deviation: ±0.10mm, unclear edge lines of the outer shape: ±0.1mm;
Chromatic deviation of ±0.11mm/100mm, the insulating ink completely covers the silver paste lines;
No ink leakage, no damage to the handwriting;
The color difference is not greater than level two;
No creases or peeling allowed;
Transparent windows should be transparent and clean, with uniform color. There should be no scratches, pinholes, or impurities.
薄膜开关，也被称为轻触式键盘或薄膜面板，是由PC、PVC、PET、FPC以及双面胶等柔软材料制成，通过丝网印刷技术制作而成的多平面组合密封结构。这种产品集图形显示、按键、标记符号、导电以及电子开关功能于一体，属于塑料电子制品。

Sample pictures of thin-film switches

Image of thin film switch 1 Image of thin film switch 2

Image of the thin film switch 3

Image of thin film switch 4; Image of thin film switch 5