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Guarniflon®은 순수한 혹은 첨가된 PTFE를 원료로 한 반제품 (시트, 테이프, 튜브, 봉) 및 완제품 전용의 최신 표면처리 기술을 보유하고 있으며 접착면이 균일 합니다.
단면 또는양면 에칭 시트 및 skived 테이프 표준 규격은 아래와 같습니다.

Sheets and skived tapes, etched on one or two sides, are available in the following standard sizes:

Sheets   Thickness:     min. mm. 1,5 - max. mm. 100   Sizes (mm.):     600 x 600 1000 x 1000 1200 x 1200 1500 x 1500

Machined products:

Rings, bushes, parts and other designed products can be etched according to the end use partially or on the total surface.

Quality of etching:

GUARNIFLON^® can guarantee the quality of etching by the control of process parameters and by evaluating the extent of etching itself through a wettability test (Contact Angle Method), and an adhesion test (ref. ASTM D903).

Contact angle method:

It is based on the measure of the angle between the tangent to a distilled water drop and the PTFE surface (ie, the contact angle).
In Figure 1 two examples of contact angle are illustrated - on unetched surface (poor wetting) and on etched surface (good wetting), respectively.
The relationship in terms of performance between contact angle and etching is shown in Figure 2.

Contact angle and surface energy of etched PTFE are related by the following formula:

where:
Es = surface energy (dynes/cm)

Fig.1   Un-etched   Etched

Fig.2 Contact Angle   Degree of Etching 20° - 45°   excellent 46° - 60°   fair > 60°   poor

CONTACT ANGLE vs. SURFACE ENERGY SURFACE ENERGY IN DYNES/CM