3M™ VHB™ Tapes — Reliable Bonding Solutions for In-Vehicle Display Systems.
With the development of intelligent, networked, and electrified automobiles,It has a profound impact on the development of cockpit electronics.And in car displays play a very important role in cockpit electronics.
The development trend of large screen, multi screen, and intelligent in car displays has been reflected. At present, the mainstream display screen size has developed to 10-15 inches, which has made significant progress compared to earlier years. The size of the central control screen under development is showing a clear trend of increasing, and new cars equipped with large screens of 20 inches, 25 inches, and even 30 inches or more are constantly emerging on the market. In terms of the design of display screens, there are also constant innovations, including single screen, dual screen, triple screen, and even multi screen linkage in terms of quantity. In terms of form, there are floating screens, curved screens, irregular screens, rotatable screens, and so on. At the same time, in order to meet the convenience and visibility of human-computer interaction, the display range is getting larger and the screen borders are getting narrower.
Compared to previous small-sized embedded display screens, the fixing of the front glass panel and frame of large-sized car display systems has become particularly important. Firstly, the trend towards larger screens and the expansion of visualization areas have resulted in narrower borders available for fixation. This places high demands on the strength of the fixed solution, which needs to be able to resist the stress caused by the deformation of the back frame size of large-sized screens, maintain the overall flatness of the display screen, and prevent warping. Secondly, the use of a large number of large-sized floating screens requires the screen to be firmly adhered and not cracked or detached in the event of a possible vehicle collision and rapid acceleration. Thirdly, the production of car screens is carried out on assembly lines, requiring the solution to have high usability, a production cycle that is not too long, and not to pollute the environment. Finally, vehicles sometimes need to have certain resistance to sunlight aging and high temperatures when placed outdoors for a long time. It also needs to have features such as light leakage prevention and waterproof sealing.So, in response to such complex and demanding requirements,As a leading material supplier in the industry;What is 3M's solution?，
3M ™ VHB ™ Adhesive tape can solve these new challenges posed by the large screen and intelligent display of car displays. 3M ™ VHB ™ Adhesive tape is an acrylic foam tape first invented by 3M Company in the 1980s. It has been on the market for 40 years until 2020, during which the length produced and sold worldwide has reached 8.4 billion meters! This length reaches the distance of 10 round trips from Earth to the Moon!VHB ™ The biggest feature of tape is the integrated acrylic adhesive component, which has the characteristics of a viscoelastic material. When subjected to external forces causing deformation, VHB ™ The foam core layer can fully absorb the stress generated by deformation and can withstand deformation at least three times its own thickness. When the display screen and back frame of the in car display system deform or are subjected to stress caused by impact during driving, VHB ™ Tape can firmly adhere the screen to the frame.VHB™ Tapes feature wide applicability and high durable bonding strength.
The intelligent in car central control display system requires various types of adhesive materials, including aluminum alloy, stainless steel, PC-ABS， Ink glass, pure glass, and so on require adhesive solutions with wide applicability. 3M ™ VHB ™ The tape system is rich and can meet the bonding requirements of various high, medium, and low surface energy materials. At the same time, there are also multiple thicknesses and colors to choose from. In the testing conducted in 3M laboratory, VHB ™ The adhesive tape demonstrates high bonding applicability to the above materials, and the bonding strength meets the design requirements for long-lasting bonding.VHB™ Tapes meet the requirements of natural aging resistance as well as high and low temperature resistance.
The environment inside the car where the car display screen is located may experience hot and humid weather in summer, with the highest temperature in the car sometimes reaching over 80 ℃, and there may also be aging effects caused by ultraviolet radiation. VHB ™ The acrylic structure integrated with adhesive tape has excellent resistance to UV aging and high and low temperature performance. After more than 5 years of aging at an outdoor aging facility in Minnesota, USA, VHB ™ The adhesive strength of the tape has maintained over 100%. After conducting a 1000 hour 85 ℃/RH85% test in the 3M aging laboratory, VHB ™ The adhesive strength remains basically unchanged.
Additionally, 3M ™ VHB ™ The GPH series of adhesive tape is specially designed and developed for higher temperature resistance requirements. Its short-term temperature resistance can reach 230 ℃, and its long-term temperature resistance performance can reach 150 ℃. In the static hanging weight test, under normal temperature conditions, the hanging weight can reach 1000g for more than 10000 minutes under an area of 0.5 in ², and 500g for more than 10000 minutes under an area of 0.5 in ² at 177 ℃
VHB ™ Tape meets the requirements of waterproof sealing
A major trend in intelligent cockpit systems is the use of large screens and multi screen combinations. Compared to traditional embedded display systems, the application of large screens and multiple screens increases the opportunity for screen edges to be exposed to the outside. In order to ensure the stability of electronic systems, it is necessary to isolate water, moisture, and dust as much as possible. In addition, there are also requirements to prevent liquids such as beverages from splashing into daily use. VHB ™ The foam core of the tape is an independently enclosed foam structure, which can effectively isolate the passage of water vapor and has good waterproof sealing properties.
In the simulated water pressure airtightness test conducted in our laboratory, VHB was used ™ The acrylic transparent cover plate and aluminum frame bonded with adhesive tape passed the tests of 1-meter water pressure, simulated 10 meter water pressure, and simulated 30 meter water pressure without any leakage. This performance has exceeded the waterproof requirement of IPX7.
VHB ™ Tape meets the requirements of rapid bonding and rapid prototyping
The production enterprises of car display screens mostly use assembly line operation methods, which generally require high production efficiency. The entire process cannot have too long a cycle, and requires easy use and fast installation and molding. VHB ™ Adhesive tape belongs to pressure sensitive adhesive (PSA), which is very suitable for this job requirement. It can establish adhesive strength through simple pressing, saving time and cost. Meanwhile, VHB ™ Adhesive tape is a fixed thickness adhesive tape with good die-cutting performance. It can be die cut according to the customer's shape, which greatly improves the customer's production efficiency.
VHB ™ Recommended types of adhesive tape for smart car displays
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Types of release materials
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Red PE release film (white logo) |
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Red PE release film (white logo)
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Red PE release film (white logo)
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Red PE release film (white logo)
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Red PE release film (white logo)
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Excellent initial adhesion, quickly establishing strengthThere are many types of thicknesses to choose from, with a range of options availableBlack improves shading propertiesWe have achieved a good balance between adhesive strength and stress bufferingHas good adhesion to various surfaces
VHB ™ GPH series adhesive tape
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Types of release materials
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Red PE release film (white logo) |
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Red PE release film (white logo)
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Red PE release film (white logo)
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Better high-temperature resistance (short-term 230 ℃)We have achieved a good balance between adhesive strength and stress bufferingClosed cell foam structure effectively prevents dust and moistureHas good adhesion to various surfaces
