Fiberglass fabric thermal shrinkage is the primary cause of PTFE tape dimensional instability. At PTFE sintering temperatures (360-400°C), residual weaving stress is released. If unrestrained, fabric shrinks; if restrained, latent stress is locked in, causing later shrinkage during adhesive curing (150-200°C) and end-use heating. Solution: use pre-heat-set fiberglass with <0.5% shrinkage at 400°C, eliminating residual stress before coating.

Thickeners in PTFE emulsion serve four critical functions: suspension stabilization (prevents settling of dense PTFE particles), shear-thinning behavior (high viscosity at rest, low under agitation for easy coating), penetration depth control (regulates resin loading on fiberglass fabric), and film uniformity (prevents cracking during drying). Critical requirement: thickeners must decompose completely at ~380°C sintering temperature, leaving zero ash residue to maintain coating purity and electrical insulation.

Aokai PTFE debuted its full product lineup at APFE Shanghai 2026 (Booth 6T602, Hall 6). Featured products include fiberglass-reinforced PTFE tapes, pure PTFE films, anti-static grades, and high-temperature conveyor belts – covering food processing, PV lamination, lithium batteries, electronics, and packaging. The exhibition runs through June 26. All products support custom specifications.

PTFE surface treatment for bonding adhesion uses two main methods: high-temperature melting (superior weather resistance, 9.5 MPa strength with coupling agent, but releases toxic gases) and sodium-naphthalene etching (5 MPa immediate adhesion, narrow 24-48 hour window, hazardous waste). Choose based on environmental control and long-term vs. short-term performance.

Testing PTFE emulsion quality involves six key indicators: solid content (60±2% per T/FSI 067-2021), pH (9.0-11.0), particle size distribution (laser diffraction/DLS), viscosity (12-30 mPa·s at 25°C), stability (centrifugal, thermal, freeze-thaw), and appearance. This guide covers standard test methods for each parameter.

To apply PTFE high temperature tape firmly on curved and irregular surfaces without bubbles and edge warping, a standardized operation process is essential, including thorough substrate pretreatment, professional application skills and proper auxiliary measures. Among them, substrate pretreatment is the most critical step, which determines about 70% of the final sticking effect.

Against the backdrop of increasingly stringent environmental regulations, PFOS/PFOA-free PTFE emulsion is an upgraded product developed to replace traditional PFOA-containing polymerization processes. It maintains the core properties of PTFE while greatly enhancing environmental friendliness and health safety.

The thermal expansion coefficient of PTFE high temperature fabric is not a fixed value. It remains relatively low at room temperature to 100°C (approximately 0.5×10⁻⁵/°C), yet rises sharply under high temperature conditions.

As a professional manufacturer of PTFE high temperature cloth, Jiangsu Aokai New Materials shares core slitting techniques. To avoid burrs, delamination and dimensional deviation during slitting, it is essential to systematically control four core elements: cutting tools, equipment, raw materials an

As an original manufacturer of PTFE high-temperature tapes, Jiangsu Aokai New Materials hereby elaborates the impacts of cooling methods and cooling rates on the performance of cured PTFE high-temperature tapes.I. Essence of PTFE Crystallization Characteristics and Cooling Rate RegulationThe PTFE su