Why PET material increasingly popular in drinking water application?

Engineering plastics empower drinking water safety: application advantages and practice of PET sheet and PET rod

In today's pursuit of healthy drinking water, engineering plastics have become a key material in the drinking water equipment industry with their excellent properties. Among them, extruded plastic sheet and rod made of polyethylene terephthalate (PET material) play an important role in the manufacturing of core components with their unique advantages.

Core Advantages of Extruded PET sheet and PET rod (Data Proof also offered as below):

1. Superior Food Safety

PET material meets stringent standards for food contact materials such as FDA, EU 10/2011, and is bisphenol A (BPA)-free, ensuring that the water flowing through it is pure and safe, making it an ideal choice for direct drinking water equipment.

2. Excellent mechanical strength and durability

PET sheet and PET rod have high rigidity (elastic modulus about 2800-3100 MPa and good impact resistance, it can withstand the water pressure inside the drinking water equipment (common working pressure 0.2-0.6 MPa ) and assembly stress, and is not easy to deform and crack after long-term use.

3. Outstanding chemical resistance

It has strong resistance to sodium hypochlorite (usually <2ppm), ozone, acid and alkaline substances, etc., which are common in water treatment, effectively preventing component corrosion and leachate pollution of water quality, and ensuring long-term stable operation of equipment.

4. Wide Temperature Adaptability

PET material can maintain good physical properties in the range of -40°C to 120°C (short-term peak tolerance can reach 150°C), meeting the stringent requirements of hot and cold drinking equipment for material temperature resistance.

5. Ease of processing and precision

Extruded PET sheet and PET rod have stable dimensions (precise tolerance control), easy to carry out CNC precision machining (up to surface roughness Ra 0.8μm), drilling, tapping, etc., can efficiently manufacture key components such as valve bodies, connectors, and support structures with complex shapes, reducing comprehensive costs.

Typical Application Cases of PET material in Drinking Water Equipment:

Filter bottle/filter shell

The core structural parts such as the end cap and center tube of the filter bottle are precisely machined from PET rods, which have high strength, water pressure resistance, and chemical corrosion resistance, ensuring that the filtration system is sealed reliably and there is no risk of precipitation in long-term use.

Valve components

Valve body, valve spool seat and other components processed by PET sheet and PET rod, with their excellent dimensional stability, wear resistance and chemical resistance, are widely used in hot and cold water switching valves and solenoid valves of drinking water equipment to ensure precise control of water flow and long-term sealing.

Connectors and pipe fittings

Precision-turned PET quick joints, pipe hoops, etc., have a stable connection, pressure resistance and corrosion resistance, and are a safe and reliable connection solution in the drinking water pipeline system.

Structural brackets and shell components

The support frame, internal partition, etc. processed by PET sheet and PET rod are lightweight and high-strength, providing stable support for the equipment.

Epilogue:

Extruded PET engineering plastic sheets and rods provide high-performance, high-reliability material solutions for the drinking equipment industry with their irreplaceable food safety, excellent mechanical and chemical stability, wide temperature resistance range and excellent processing performance. From key filter components to precise valves that control water flow, PET material continues to help drinking water equipment develop in a safer, more durable and smarter direction, silently protecting the drinking water health of thousands of households.