Liquid crystal polymer film and laminate comprising the same
A liquid crystal polymer, laminate technology, applied in the direction of liquid crystal materials, layered products, coatings, etc., can solve the problems of degraded laminates, insufficient adhesion, and high signal loss
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preparation example 1
[0030] Preparation Example 1: Liquid Crystal Polymer Resin
[0031] In a 3-liter autoclave, 540 grams of 6-hydroxy-2-naphthoic acid, 1071 grams of 4-hydroxybenzoic acid, 1086 grams of acetic anhydride, 1.3 grams of sodium phosphite and 0.3 grams of 1-methylimidazole (1-methylimidazole) is mixed, and it is subjected to acetylation reaction for about 2 hours in a nitrogen atmosphere, 160°C, and normal pressure environment; then, the temperature is raised to 320°C at a rate of 30°C per hour, Then under this temperature condition, the pressure is slowly decreased from 760 torr to below 3 torr, and the temperature is raised from 320°C to 340°C; after that, the stirring power is increased, the pressure is increased, the material is discharged, the strands are pulled, and the pellets are cut to obtain a melting point of about Liquid crystal polymer resin with viscosity (@300℃) of about 45Pa·s at 278℃.
preparation example 2
[0032] Preparation Example 2: Liquid Crystal Polymer Resin
[0033] In a 3-liter autoclave, 440 grams of 6-hydroxy-2-naphthoic acid, 1145 grams of 4-hydroxybenzoic acid, 1085 grams of acetic anhydride and 1.3 grams of sodium phosphite were mixed and placed in a nitrogen atmosphere, The acetylation reaction was carried out at 160°C and normal pressure for about 2 hours; then, the temperature was raised to 320°C at a rate of 30°C per hour, and then the pressure was slowly decreased from 760 torr to below 3 torr at this temperature, and the temperature was increased from The temperature is raised from 320°C to 340°C; after that, the stirring power is increased, the pressure is increased, the material is discharged, the strands are pulled, and the pellets are cut to obtain a liquid crystal polymer resin with a melting point of about 305°C and a viscosity (@300°C) of about 40Pa·s.
[0034] Liquid crystal polymer film
Embodiment 1 to 12、 comparative example 1 to 6
[0035] Examples 1 to 12, Comparative Examples 1 to 6: Liquid crystal polymer film
[0036] The liquid crystal polymer resins obtained in Preparation Examples 1 and 2 above were selected as raw materials, and the liquid crystal polymer films of Examples 1 to 12 and Comparative Examples 1 to 6 were respectively prepared by the following methods.
[0037] First, put the liquid crystal polymer resin into an extruder with a screw diameter of 27 mm (instrument model: ZSE27, purchased from Leistritz) and heat it to 300°C to 320°C, and then heat it at a rate of 5.5 kg / hr to 8.5kg / hour. The feeding speed of hr extrudes the liquid crystal polymer resin from a T-die with a width of 500 mm, and then passes it into the T-die with a distance of about 5 to 20 mm, a temperature of about 290°C to 330°C, and a diameter of about 35 cm to 45 cm Between the two cast film wheels, it is pressed out with a force of about 20 kilonewtons (kN) to 60 kN; then it is sent to the cooling wheel for cooling a...
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Abstract
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