What is lead-free soldering?

In the development of soldering materials, tin-lead alloy has always been the best and cheapest welding material, and it can meet the requirements of welding quality and reliability. However, with the strengthening of human awareness of environmental protection, the harm of “lead” and its compounds to human health and environmental pollution has been increasingly valued.

I. What is lead-free soldering?

Lead-free soldering is a soldering technique and process that does not contain the element lead, used in electronic assembly and soldering process. Compared with traditional lead-based soldering, lead-free soldering reduces the environmental and health risks associated with the use of lead and is a more environmentally friendly and sustainable soldering method.

II. Why use lead-free soldering?

The US Environmental Protection Agency (EPA) has classified lead and its compounds as one of the 17 chemical substances that seriously endanger human life and the natural environment, and lead can enter the food chain of animals or humans through infiltration into the groundwater system.  In daily work, the human body can absorb lead or its compounds through skin absorption, breathing, and eating. When these substances reach a certain amount in the body, they can affect the normal synthesis of proteins in the body, damage the central nervous system, and cause symptoms such as nervous and regenerative system disorders, stupor, anemia, intellectual decline, hypertension, and even infertility. Lead poisoning belongs to heavy metal poisoning, and it also has the problem of being non-excretable and gradually accumulating in the human body.

The following are several significant characteristics of lead-free soldering:

1. Environmentally friendly

Lead-free soldering is a more environmentally friendly soldering technology. Lead is a hazardous substance that poses potential risks to human health and the environment. Lead-free soldering eliminates the environmental pollution and hazards caused by lead, which conforms to the global trend of environmental protection laws and regulations.

2. Improved reliability

Lead-free soldering has improved the reliability of the soldering interface. Traditional lead soldering has reliability problems, such as thermal shock cracks, delayed fracture and so on. Lead-free soldering adopts new soldering materials and processes, which can provide better soldering strength and long-term reliability of electronic components.

3. Optimized electrical performance

Lead-free soldering can also significantly optimize electrical performance. The presence of lead can have a certain negative impact on electrical performance, such as resistance, inductance and capacitance. The use of lead-free soldering materials reduces contact resistance and improves the quality and stability of signal transmission.

4. Compliance with international standards

With the global demand for environmental protection, lead-free soldering has become a requirement of international standards and regulations. The EU’s RoHS Directive and the US standard J-STD-020, etc., both explicitly require the use of lead-free soldering materials and processes in electronic manufacturing to ensure product sustainability and market access.

Ⅲ.The application of lead-free soldering in the field of bottles

Lead-free soldering is widely used in various fields of electronics manufacturing, including TV, mobile phones, computers, automotive electronics, medical devices and so on. Lead-free soldering has become the mainstream of electronic manufacturing, providing strong support for product quality, reliability and environmental friendliness.

With green and healthy becoming the trend, lead-free soldering has gradually begun to appear in the bottle industry. In the field of bottles, lead-free soldering is mainly applied to welding, using welding technology to combine the inner and outer shells together to improve the strength and stability of the bottles, and increase the service life of the product and added value. As the interior of the bottles often needs to be in contact with hot water, lead-free materials can also ensure product safety and hygiene to a certain extent. In addition, it can also improve the quality and reliability of the bottle, increase the product’s added value and competitiveness.

Haers is currently the only company that has developed lead-free solder and processing methods that can be used on kids’ water bottles and stainless steel bottles，The use of lead-free soldering technology can effectively improve the quality and reliability of the bottles, but also in line with international environmental standards, which undoubtedly proves the strength and product quality of Haers.

Overall, the application of lead-free soldering in the field of bottles is of great significance. As people’s requirements for environmental protection and health continue to improve, lead-free soldering will become an important trend in the manufacture of water bottles, providing thermos water bottle manufacturers with higher quality, more reliability and more environmentally friendly products.