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Heat isolating composite film and its prepn and use

A composite film and function technology, applied in synthetic resin layered products, layered products, chemical instruments and methods, etc., can solve the problems of low performance, thick insulation film material, single function, etc. The effect of contact heat conduction and reasonable function

Inactive Publication Date: 2005-09-28
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] It can be seen from the existing patented technology that the existing insulating film material is not only too thick, but also has a single function
At the same time, it is not high performance, poorly characterized or obvious as thermal insulation, and it is not even used for thermal insulation

Method used

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  • Heat isolating composite film and its prepn and use

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The heat-insulating composite film of the present invention uses a calendered polyester film of 12 μm, on which a dense aluminum layer with a thickness of 38nm to 42nm is evaporated and coated, and then the evaporated coating of larger particles of aluminum metal particles in an aerobic environment is used. The thickness is 28nm-32nm. Finally, a 10μm polyester calendered film with a melting temperature slightly lower than that of the base film is used to calender and compound the base film of the metal coating to form a sandwich structure composite film with a polymer sandwiched by a metal layer. The structure is shown in the attached figure 1 . The thickness of the formed composite film is only 21.8-21.9 μm, and the thermal conductivity is relatively low compared to the two-layer composite film (polyester film 24 μm + aluminum layer 40nm-45nm) and the three-layer composite aluminum film (polyester film 12 μm + aluminum layer 38nm) ~ 42nm + polyester film 12μm) has obvi...

Embodiment 2

[0041] Using the same base film and metal coating as in Example 1, and covered with a modified polyester film, the melting temperature of the film is 200-210 ° C, and the thickness is 6-7 μm. film, it is easier to carry out thermal bonding processing between films. The measured overall average thickness is 18.3-18.4 μm, and the measured thermal conductivity is compared with that of Example 1 as shown in Table 3. Obviously, the thermal insulation of the coated film is better, the reason is that the surface of the film is rougher and the structure is looser, especially when the multi-layer composite film is combined.

[0042] Composite film

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PUM

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Abstract

The present invention relates to one kind of heat isolating composite film and its preparation process and use. Structurally, the heat isolating composite film consists of compounded base polymer film of high strength and low heat conducting coefficient, metal layer with high reflecting performance, metal oxide layer with high heat isolating performance and outer polymer film with low heat conducting coefficient and high hot adhering strength. The composite film may have thickness of 12-1000 micron. The heat isolating composite film is prepared through evaporation plating one very thin compact metal layer and one very thin loose metal layer successively onto rolled polymer film and then oxidizing, or evaporation plating metal oxide layer directly; and final rolling or curtain coating one other polymer film layer. The heat isolating composite film has excellent heat insulating performance, is light, thin and soft, and may be used in various flexible heat insulating material.

Description

Technical field: [0001] The invention relates to the field of functional composite materials, and is a high-performance heat-insulating flexible composite membrane material and its preparation and application technology. Background technique: [0002] Membrane science and technology has developed rapidly since the 1950s, and has been widely used in industry, agriculture, medicine and other fields, and has become a branch of structural and functional materials. As far as the basic problems and applications of membrane science and technology are concerned, it is membrane materials or membrane structure and functional materials. Due to the good flexibility, light weight and strong compoundability of membrane structural materials, rigid materials can be changed into flexible materials, and materials can be used efficiently and in a targeted manner. Therefore, in recent years, new materials and new Technologies and new processes are constantly emerging, and relevant basic and ap...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B27/00
Inventor 于伟东黄鹤袁琴华朱泉
Owner DONGHUA UNIV
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