Method for preparing metal plastic composite foil

A technology of metal-plastic and composite foil, which is applied in the direction of metal layered products, chemical instruments and methods, and cables with twisted/four-strand twisted strands, etc., which can solve the problem of poor adhesion between aluminum foil and plastic, communication cables, etc. High resistivity, unstable shielding performance and other problems, to achieve the effect of good surface quality, good shielding performance and high tensile strength

Active Publication Date: 2009-03-18
盛文妹
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] In order to solve the deficiencies of the existing aluminum-plastic composite products for shielding due to backward technology, high resistivity, low tensile strength, poor adhesion between aluminum foil and plastic, and unstable shielding performance, the invention provides a metal-plastic composite foil The preparation method of the obtained metal-plastic composite foil has good surface quality, uniform thickness of each layer, consistent bonding performance, high adhesion, high tensile strength, high elongation, low resistivity, and good shielding performance.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: metal foil-plastic film composite

[0019] Composite method:

[0020] Aluminum foil with a thickness of 10 μm-polyester plastic film (PET) with a thickness of 12 μm, the total thickness after compounding is 25 μm.

[0021] Preparation:

[0022] Prepare A-969V, A-5, and ethyl acetate with a weight ratio of 10:3.3:17, and spread them evenly on the polyester film with a coating amount of 3g / m 2 , through three drying tunnels—the first temperature is 70°C, the second temperature is 65°C, and the third temperature is 35°C. The length of each drying tunnel is 2 meters, and the running speed is 1.1m / s. Aluminum foil and poly The ester film is compounded, and then placed in an oven at 50° C. for 24 hours to obtain the metal-plastic composite foil. After testing, the prepared metal-plastic foil has a tensile strength of 111.0 MPa, an elongation at break of 36.8%, and a dielectric strength of 2 kV, DC, and no breakdown under the condition of 1 min.

Embodiment 2

[0023] Embodiment 2: plastic film-metal foil-plastic film composite

[0024] Composite method:

[0025] Polyester plastic film (PET) with a thickness of 12 μm-aluminum foil with a thickness of 10 μm-ethylene methacrylic acid copolymer film (EMAA) with a thickness of 25 μm, the total thickness after composite is 50 μm.

[0026] Preparation:

[0027] Prepare A-969V, A-5, and ethyl acetate with a weight ratio of 10:3.3:17, and coat them evenly on the polyester film and ethylene-methacrylic acid copolymer film respectively, and the coating amount is 2g / m 2 , each through three drying tunnels—the first temperature is 75°C, the second temperature is 65°C, and the third temperature is 30°C. The length of each drying tunnel is 2 meters, and the running speed is 1.0m / s. Then the aluminum foil Composite with polyester film first, place in oven at 45°C for 20 hours, then compound with ethylene-methacrylic acid copolymer film, place in oven at 45°C for 20 hours to get the metal-plastic ...

Embodiment 3

[0028] Example 3: Metal foil-plastic film-metal foil

[0029] Composite method:

[0030] Aluminum foil with a thickness of 9 μm-polyester plastic film (PET) with a thickness of 25 μm-aluminum foil with a thickness of 9 μm, the total thickness after compounding is 45 μm.

[0031] Preparation:

[0032] Prepare A-969V, A-5, and ethyl acetate with a weight ratio of 10:3.3:17, and spread them evenly on the polyester film with a coating amount of 3g / m 2 , through three drying tunnels—the first temperature is 65°C, the second temperature is 60°C, and the third temperature is 40°C. The length of each drying tunnel is 2 meters, and the running speed is 1.2m / s. Then the aluminum foil and Polyester film compounding, put it in an oven at 50°C for 20 hours, then coat the prepared polyurethane adhesive on the surface of the polyester film layer, process it in three drying tunnels, the treatment conditions are the same as before, and then compound it with aluminum foil, place it in an oven...

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Abstract

The method includes following steps: after being dissolved by acetic ether, polyurethane adhesive is coated on plastic film, coating weight 2 - 4g / m2, and passing through drying tunnel with three tracks; compounding metal foil with plastic film, placing it in oven for 20-30 hr. under temperature 45-55 deg.C so as to obtain metal plastic composite foil. The polyurethane adhesive is prepared from main agent polyether glycol, firming agent of aromatic isocyanate. Mass compounding ratio of main agent, firming agent, and acetic ether is 10:1 - 4:8 - 20. Advantages are: good surface quality, even thickness in each layer, concurrent bonding property, large adhesion, and tensile strength, high extensibility, low resistivity, and good shielding properties. The invention provides condition for producing communication line in high performance.

Description

(1) Technical field [0001] The invention relates to a preparation method of a metal-plastic composite foil. The metal-plastic composite foil is mainly used as a shielding material of a communication cable. (2) Background technology [0002] As the country attaches great importance to infrastructure construction, such as the transformation of urban and rural power grids, the development of information highways, the take-off of communications, the upgrading of electrical equipment and the requirements for energy conservation, etc., the varieties and levels of communication wires and cables will continue to be raised. new requirements. [0003] At present, only 30% of the cable varieties in our country have reached the level that the international market can accept and participate in competition, and 70% of the cable varieties urgently need to improve the product level and grade. The decisive factor for improving cable products is to improve the quality and technical level of ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05K9/00H01B11/06B32B15/08
Inventor 盛文妹钱庆祝
Owner 盛文妹
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