PTFE Injection Molding

PTFE injection molding delivers unmatched chemical resistance, thermal stability, and low friction properties for high-performance applications.

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Polytetrafluoroethylene (PTFE), commonly known by the brand name Teflon, is a high-performance fluoropolymer with exceptional chemical resistance, low friction, and high-temperature stability. Unlike conventional thermoplastics, PTFE injection molding requires specialized processing due to its high melting point and non-melt-flow characteristics. With extensive experience in teflon injection molding, we provide high-quality, reliable parts for industries requiring extreme durability, including medical, aerospace, and semiconductor applications.

PTFE Injection Molding Design Guide

Designing injection molded PTFE components requires careful consideration due to the material’s unique properties, such as its high melt temperature, low surface energy, and lack of melt flow. To ensure manufacturability and performance, follow these key design guidelines:

Item	Description
Wall Thickness	Maintain uniform wall thickness (typically 1.5–3 mm) to prevent warping and ensure even sintering.
Draft Angles	Use at least 1–3° draft to facilitate part ejection from the mold.
Undercuts & Sharp Edges	Avoid complex undercuts and sharp internal corners to minimize stress concentrations.
Gate Placement	Position gates strategically to allow even filling and reduce defects like voids or incomplete fills.
Shrinkage Allowance	PTFE has a high shrinkage rate (2–5%), requiring careful compensation in mold design.
Post-Molding Sintering	Sintering at 350–400°C is necessary to achieve full material strength and remove internal stresses.
Tolerance Control	Due to shrinkage, achieving tight tolerances requires secondary machining or precision finishing.

Advantages of PTFE Injection Molding

Exceptional Heat Resistance

With a continuous operating temperature range from -200°C to 260°C (-328°F to 500°F), PTFE can withstand extreme thermal conditions without losing its mechanical integrity. It also maintains its properties under intermittent exposure to even higher temperatures.

Ultra-Low Friction & Non-Stick Surface

PTFE has one of the lowest coefficients of friction among solid materials (0.05 – 0.10), reducing wear and eliminating the need for lubricants. This makes it highly effective in sliding components and anti-adhesive applications.

Superior Electrical Insulation

With a dielectric strength of up to 60 kV/mm, PTFE provides outstanding electrical insulation, even in high-frequency and high-voltage environments, making it essential for aerospace and electronic applications.

UV & Weather Resistant

Unlike many plastics, PTFE does not degrade under prolonged UV exposure, ozone, or outdoor conditions, ensuring long-term durability in harsh environments.

Non-Flammable & Self-Extinguishing

With a limiting oxygen index (LOI) above 95%, PTFE is inherently non-flammable and does not support combustion, making it safe for use in high-risk environments.

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PTFE Injection Molding Application

Industrial & Chemical

Valve seats and seals
Chemical-resistant gaskets
Pump housings and diaphragms
Corrosion-resistant pipe fittings

Electronics

High-voltage insulators
Microwave and RF components
Semiconductor wafer carriers
Precision electrical connectors

Medical & Healthcare

Surgical instrument components
Catheter liners and guidewire coatings
Biocompatible tubing and seals
Non-stick medical trays and containers

Food Processing

FDA-compliant non-stick coatings
Food-grade valve components
Heat-resistant conveyor belts
Low-friction kitchenware components

Additonal Options for PTFE Parts