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Explore the various glues needed for PCB circuits

Release time:

2024-04-25 14:56

In today's fast-growing electronics industry, printed circuit boards (PCBs) are an indispensable core component of all electronic devices. They act as physical supports for electronic components and provide conductive paths connecting these components. In order to ensure the long-term performance and reliability of the PCB, choosing the right type of glue is essential for bonding different components. This article will explore the various types of glue used in PCB circuits and their application scenarios to help engineers and manufacturers make informed choices.

 

First, we must recognize that the environment in which PCBs operate is often challenging, including thermal stress, chemical corrosion, and mechanical loading. Therefore, the ideal glue needs to have certain characteristics: good electrical insulation, high bond strength, temperature resistance, chemical resistance and the ability to adapt to different curing environments.

 

1. Epoxy resin adhesive

Epoxy glue is one of the most commonly used adhesives in PCB assembly. It provides strong adhesion and is suitable for a variety of materials, such as metals, glass, ceramics and plastics. Epoxy resin glue forms a hard and strong structure after curing, with good temperature resistance and chemical resistance. In addition, it also has excellent electrical insulation properties, making it an ideal choice for connecting electronic components. However, one disadvantage of epoxy adhesives is that volatile by-products may be generated during the curing process, which requires proper ventilation during application.

 

2. Polyurethane adhesive

Polyurethane adhesives are known for their excellent flexibility and impact resistance, and they also have a place in PCB applications. They maintain their physical properties over a wide temperature range and are highly resistant to moisture and chemicals. Polyurethane adhesives are particularly suitable for applications that may be subject to vibration or shock because they can absorb stress without cracking or falling off.

 

3. Silicone rubber

Silicone rubber, especially the RTV (room temperature vulcanization) type, is favored in the electronics industry due to its unique temperature resistance and flexibility characteristics. RTV silicone rubber cures at room temperature without heating or special curing equipment, making it ideal for field applications. In addition, they show excellent stability to environmental factors such as temperature fluctuations and humidity changes, and have good electrical insulation.

 

4. Conductive adhesive

In some cases, such as when a cable needs to be connected to a PCB, conductive glue may be used. The conductive paste typically contains metal particles, such as silver or copper, to provide a conductive path. They can not only fix the components, but also ensure a good electrical connection. This type of glue is particularly useful for creating electromagnetic interference (EMI) shielding or grounding paths.

 

5. Acrylic glue

Acrylic glue is popular for its fast curing and high strength bonding. They are suitable for PCB assembly on high-speed production lines because products can be handled and moved quickly without delaying the production cycle. In addition, acrylic glue also shows good anti-aging and anti-ultraviolet ability, suitable for outdoor use of electronic equipment.

 

6. UV curing adhesive

UV curing glue is a kind of glue that is rapidly cured by ultraviolet light irradiation. This type of glue is very suitable for automated processes because it can be cured in a few seconds, which greatly improves production efficiency. UV curing adhesives are suitable for precision applications, such as fixing small or sensitive electronic components.

 

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Dry Goods Sharing on Dispensing Machines | 6 Key Steps to Solve Nozzle Clogging Issues

Dry Goods Sharing on Dispensing Machines | 6 Key Steps to Solve Nozzle Clogging Issues

在点胶机操作中，胶嘴堵塞是一种常见但十分影响胶水正常输出的问题。了解其成因并采取有效解决方法对于保持生产的顺利进行至关重要。接下来，专注点胶机多年的小编将全面介绍这个问题，以帮助您彻底解决它：

Explore the various glues needed for PCB circuits

Explore the various glues needed for PCB circuits

In today's fast-growing electronics industry, printed circuit boards (PCBs) are an indispensable core component of all electronic devices. They act as physical supports for electronic components and provide conductive paths connecting these components. In order to ensure the long-term performance and reliability of the PCB, choosing the right type of glue is essential for bonding different components. This article will explore the various types of glue used in PCB circuits and their application scenarios to help engineers and manufacturers make informed choices.

Learn more about EVA glue

Learn more about EVA glue

Ethylene-vinyl acetate copolymer (EVA) glue is a thermoplastic styrene-butadiene rubber, rosin modified resin, petroleum resin and solvent-based adhesive, designed for bonding EVA materials. It is also suitable for many other materials, such as wood, leather and foam (EPE), and is popular for its excellent bonding effect and long-term aging stability. This article will explore the characteristics of EVA glue, use and use precautions.

Matters needing attention when dispensing nylon glue with glue dispensing machine

Matters needing attention when dispensing nylon glue with glue dispensing machine

As a kind of precision liquid packaging equipment, glue packaging machine has been widely used in chemical, pharmaceutical, food and other industries. When dispensing nylon glue, a special material, the operator needs to be more cautious, because the physical and chemical properties of nylon glue are different from other liquids, which may affect the normal operation of the equipment and the quality of the glue product. Below, this article will introduce in detail several aspects that the glue dispenser needs to pay attention to when dispensing nylon glue.

Guide to the use of dispensing syringes

Guide to the use of dispensing syringes

As an indispensable tool in modern industrial production, dispensing syringes are widely used in electronics, automobiles, medical and many other fields. Its accuracy and efficiency bring great convenience to the production process of various industries. However, for the first contact or use of unskilled people, how to use the dispensing syringe correctly and efficiently may become a difficult problem. This article aims to provide you with a detailed guide to the use of dispensing syringes, to help you better grasp the use of this tool skills.

How to choose the right dispensing needle for the dispensing machine?

How to choose the right dispensing needle for the dispensing machine?

The glue dispenser is also called glue coating machine, glue dripping machine, glue filling machine, etc. It is an automatic machine that specially controls the fluid and drips and coats the fluid on the surface of the product or inside the product. It can realize three-dimensional and four-dimensional path glue dispensing, precise positioning, precise glue control, no wire drawing, no glue leakage and no glue dripping. The glue dispenser is mainly used for the precise point, injection, coating and drip of glue, paint and other liquids in the product process to the precise position of each product. It can be used to achieve dot, line, circle or arc. How to choose the right dispensing needle for the dispensing machine? The following guidelines are for reference: 1. Small point: small size dispensing needle, low pressure, short time. 2. Big point: large dispensing needle, greater pressure, longer time. 3. thick glue: oblique needle, large pressure, according to the need to set the time. 4. Aqueous liquid: small size needle, less pressure, set time as needed Fluids requiring special settings: 1. Instant glue: use safety piston and Teflon-lined metal needle for water-based instant glue, use tapered needle for thick instant glue, and use PP needle if flexibility is required. 2.UV glue: use amber syringe, white piston and inclined needle (can shield UV). 3. Anaerobic glue: use 10CC syringe and white PE universal piston. 4. Sealant and paste fluid: If the use of white piston rebound serious, please switch to the safety type, the use of oblique needle. Dongguan Xiangzhirui Electronics Co., Ltd. is located in Humen Town, Dongguan City, which is known as the "World Factory", at the head of the "Four Tigers" in Guangdong on the east bank of the Pearl River Estuary. The company in line with: customer demand-oriented, mutually beneficial and win-win principle of business philosophy! In the modern environment of rapid development of scientific and technological innovation, rapid development and rapid progress, Xiang Zhirui people: treat people with sincerity and establish the world with faith. Since the establishment of the company in 2004, the point of sale of glue equipment (including precision dispensing equipment, automatic glue machine) to introduce Taiwan, Europe and the United States technology, the use of imported accessories, domestic assembly, no pollution, low noise. It can help you reduce the amount of raw materials, improve product quality, and truly reduce production costs and reduce labor expenditures in the process of bonding, sealing, and filling. The dispensing accessories (including: dispensing needle, dispensing syringe, dispensing valve, sleeve assembly, dispensing adapter, pressure cylinder and various accessories matched with dispensing process requirements) are designed and manufactured in accordance with the "Industrial Application Safety Production Standard", which can meet the requirements of most dispensing production technologies and can be completed conveniently and quickly from complex multiple area shapes to simple processes such as dot, line, potting, etc. At the same time, we will absorb the new knowledge of the tentacles of a wide range of extension, the professional and technical solid deep plowing. After more than ten years of development, the company has gone from simple sales to the current one-stop service of production and sales. Company customers throughout Europe and the United States, Southeast Asia, Vietnam, Taiwan, Hong Kong and domestic regions. Along the way, it depends on the trust and support of customers and friends! It depends on the continuous efforts of Xiang Zhirui people! We will continue to cherish the trust and support of every friend, and make the products better, more complete specifications and more stable quality.

Advanced dispensing technology: a comprehensive interpretation of stainless steel dispensing needles

Advanced dispensing technology: a comprehensive interpretation of stainless steel dispensing needles

In high-end fields such as precision industrial manufacturing, electronic packaging and medical equipment, precise dispensing technology is a key link to ensure product quality. As an important part of the dispensing equipment in direct contact with the glue-the dispensing needle, its choice has a vital impact on the stability and accuracy of the dispensing process. Among the many materials of dispensing needles, stainless steel dispensing needles are favored for their excellent performance. This article will delve into the applicability of stainless steel dispensing needles to help users better understand and choose the right dispensing solution.

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