Briefly introduce the 3mm thick PTFE plate lining of the mixer

Source：www.dqig.cn Release date： 2025年06月16日

Information summary：The 3mm thick PTFE plate (polytetrafluoroethylene, PTFE) lining of the agitator is a process treatment that achieves specific functions by pasting/spraying PTFE plates on the inner wall or surface of the agitator components. Here is a brief introduction from the aspects of material characteristics, process advantages, application scenarios, etc.: 1、 Core characteristics of Teflon board 1. Extrem

The 3mm thick PTFE plate (polytetrafluoroethylene, PTFE) lining of the agitator is a process treatment that achieves specific functions by pasting/spraying PTFE plates on the inner wall or surface of the agitator components. Here is a brief introduction from the aspects of material characteristics, process advantages, application scenarios, etc.:
1、 Core characteristics of Teflon board
1. Extremely strong chemical inertness
Resistant to strong acids, strong alkalis, and strong oxidants (such as aqua regia and concentrated nitric acid), it hardly reacts with any chemical substances and is suitable for stirring corrosive media (such as sulfuric acid, sodium hydroxide solution, organic solvents).
2. Outstanding resistance to high and low temperatures
The temperature range for use is -200 ℃~+260 ℃. It does not decompose or soften at high temperatures, and maintains flexibility at low temperatures. It is suitable for stirring conditions in extreme temperature zones (such as freezing reactions and high-temperature polymerization).
3. Low friction and non stickiness
The surface friction coefficient is low (0.04), the material is not easy to adhere, easy to clean, and has low resistance during mixing, which can reduce energy consumption (such as reducing wall hanging during coating and adhesive mixing).
4. Stable physical performance
The 3mm thick PTFE plate has good impact resistance and wear resistance, is not easily damaged under long-term stirring conditions, and has excellent insulation properties (dielectric constant 2.1), suitable for special fields such as electronic chemicals.
2、 The advantages of lining the mixer with PTFE plates
1. Corrosion prevention and resistance to medium erosion
Typical scenario: In the chemical industry, when stirring materials containing fluoride and strong acid and alkali, ordinary metal stirrers are prone to corrosion, while PTFE lining can extend equipment life to 5-10 years (such as fluoride preparation reaction kettle stirrers).
2. Avoid material contamination
Teflon has high purity (impurity content<0.01%), does not migrate or adsorb with materials, and is suitable for the food and pharmaceutical industries (such as ensuring hygiene standards when mixing pharmaceutical raw materials and food additives).
3. Reduce maintenance costs
Non sticky reduces material residue, eliminates the need for frequent disassembly and cleaning, and can extend maintenance cycles by 3-5 times; The wear-resistant characteristics reduce the frequency of component replacement, and the overall cost is reduced by more than 40% compared to ordinary mixers.
4. Adapt to complex working conditions
Capable of withstanding high pressure (such as below 10MPa) and high rotation speed (stirring speed ≤ 300rpm), maintaining stable performance in polymerization reactions, nanomaterial preparation, and other scenarios (such as lithium battery slurry agitator).
3、 Lining process and structural design
1. Process method

Adhesive method: Use a specialized fluororubber adhesive to attach a 3mm PTFE plate to the inner wall of the mixer. The metal surface needs to be roughened in advance (such as sandblasting) to ensure adhesion (tensile strength ≥ 5MPa).

Compression molding: For irregular mixing components (such as blades), a mold hot pressing method is used to tightly bond the PTFE plate with the substrate, avoiding joint leakage.
2. Structural optimization
The board joint adopts a lap design (lap width ≥ 20mm), and is sealed by high-frequency welding to prevent the medium from penetrating between the lining and the substrate; Make rounded corners (R ≥ 5mm) at the corners to reduce cracking caused by stress concentration.
4、 Typical application scenarios
Chemical industry: Mixing of pesticide intermediates and dye solutions to prevent material corrosion of equipment (such as sodium hydroxide solution mixing in chlor alkali industry).
Food and Medicine: Mixing candy syrup and antibiotic raw materials to meet GMP hygiene requirements (avoiding metal ion contamination).
Electronic materials: photoresist, high-purity solvent stirring to ensure material purity (PTFE plate impurity leaching amount<1ppm).
Environmental protection industry: Mixing of acidic/alkaline sludge in wastewater treatment to resist long-term corrosion (such as the agitator in electroplating wastewater treatment tanks).

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