Liquid crystal polymer film, and composite film of liquid crystal polymer and polyimide and manufacturing method thereof
A liquid crystal polymer, polyimide technology, applied in liquid crystal materials, chemical instruments and methods, synthetic resin layered products, etc., can solve the problem of reducing the high frequency characteristics of circuit substrates, and achieve the effect of good processability
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Embodiment 1
[0080] As described in the following composition, the liquid crystal polymer resin composition includes, A. p-hydroxybenzoic acid (p-hydroxybenzoic acid); B. 6-hydroxy-2-naphthoic acid (6-hydroxy-2-naphthoic acid); C. p-coumarin Acid (p-hydroxycinnamic acid); wherein the mass ratio of A / B / C is 68 / 24 / 8.
[0081] see Figure 7 As shown, the preparation of the liquid crystal polymer is based on the blown bag mechanism film, and the bag design is installed on both sides of the film bag, and the liquid crystal polymer film is fixed on the left and right sides. The liquid crystal polymer film will not wrinkle due to the temperature drop. Folded and deformed, the surface is flat and wrinkle-free.
[0082] Liquid crystal polymer film with a thickness of 50 μm is first irradiated with UV light to increase cross-linking, and then with a polyimide film with a thickness of 50 μm, the composite layer of liquid crystal polymer and polyimide is hot-pressed with a double steel belt The lowe...
Embodiment 2
[0084] Example 2 was prepared in a similar manner to Example 1, with the difference that the mass ratio of A / B / C in the liquid crystal polymer resin of Example 2 was 70 / 24 / 6, by forming a film in a blown bag.
[0085] Liquid crystal polymer film with a thickness of 50 μm is first irradiated with UV light to increase cross-linking, and then with a polyimide film with a thickness of 75 μm, the composite layer of liquid crystal polymer and polyimide is hot-pressed with a double steel belt The lower layer has high temperature steel plate, 230℃, 100Kg / cm 2 ), a composite film of high temperature hot-pressed liquid crystal polymer and polyimide, and its various physical tests are shown in Table 1.
Embodiment 3
[0087] Example 3 was prepared in a similar manner to Example 1, with the difference that the mass ratio of A / B / C in the liquid crystal polymer resin of Example 3 was 73 / 25 / 2, by making a film in a blown bag.
[0088] Liquid crystal polymer film with a thickness of 25 μm is first irradiated with UV light to increase cross-linking, and then with a polyimide film with a thickness of 50 μm, the composite layer of liquid crystal polymer and polyimide is hot-pressed with a double steel belt The lower layer has high-temperature steel plates, 230°C, 80Kg / cm 2 ), has high temperature hot pressing effect, and has good adhesion between the composite film of liquid crystal polymer and polyimide, and its various physical tests are shown in Table 1.
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