Cooling tower fin structure

Abstract

The present invention provides a heat sink structure for a cooling tower, comprising: a heat sink body, the heat sink system being made of a PET composition and having flexibility, the heat sink body having a first surface and a second surface opposite to the first surface; and a crystalline layer, the crystalline layer being formed of thermoplastic on the first surface and the second surface of the heat sink body, so as to prevent the heat sink body from hydrolyzing due to water flow through the crystalline layer.

Claims

1. A heat sink structure for a cooling tower, comprising: A heat sink body, the heat sink system being made of a PET composition and being flexible, having a first surface and a second surface opposite to the first surface; and a crystalline layer formed of thermoplastic on the first and second surfaces of the heat sink body.

2. The cooling tower heat sink structure as described in claim 1, wherein the crystalline layer is formed by attaching a PET film to the first surface and the second surface and undergoing a heating and softening process, wherein the PET film is heated to 65~115°C, and then the PET film and the heat sink body are stretched simultaneously or alternately in the mechanical direction (MD) and the transverse direction (TD), and the stretching ratio is 3~4 times (MD) and 3~4 times (TD), and the temperature range is controlled at 75~145°C. After stretching, the PET film is heated to 165~235°C and the heating temperature is maintained for a set time, and then cooled and shaped into a crystalline layer on the first surface and the second surface.

3. The heat sink structure for cooling towers as described in claim 2, wherein the thickness of the crystalline layer is 10 μm to 14 μm.

4. The cooling tower fin structure as described in claim 2, wherein the tensile strength of the mechanical direction (MD) of the crystalline layer is 21 kg / mm² to 26 kg / mm².

5. The cooling tower fin structure as described in claim 2, wherein the tensile strength of the crystalline layer in the transverse direction (TD) is 20 kg / mm² to 25 kg / mm².

6. The cooling tower heat sink structure as described in claim 1, wherein the crystalline layer is formed by attaching a PE film to the first surface and the second surface and undergoing a heating and softening process, wherein the PET film is heated to 70~100°C, and then the PET film and the heat sink body are stretched simultaneously or alternately in the mechanical direction (MD) and the transverse direction (TD), and the stretching ratio is 3~4 times (MD) and 3~4 times (TD), and the temperature range is controlled at 90~120°C. After stretching, the PET film is heated to 90~130°C and the heating temperature is maintained for a set time, and then cooled and shaped into a crystalline layer on the first surface and the second surface.

7. The cooling tower heat sink structure as claimed in claim 1, wherein the heat sink body with a crystalline layer can be formed into a three-dimensional structure having multiple fluid flow channels both inside and on the surface.

8. The cooling tower fin structure as claimed in claim 1, wherein the PET composition further comprises: Additives and / or auxiliaries; the additives are selected from one or more of glass fiber, barium sulfate, titanium dioxide, titanium dioxide, metal salt ion polymers, and talc; the auxiliaries are selected from one or more of toughening agents, surface improvers, antioxidants, flame retardants, fillers, nucleating agents, ultraviolet absorbers, chain extenders, and anti-hydrolysis agents, wherein the PET composition contains less than 5 wt% isophthalic acid, has an acid value of less than 45 meq / kg, and an intrinsic viscosity (IV) of greater than 0.6 dl / g.

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