English
A device for producing LCP thin film liquid crystal materials specifically for 5G communication. It involves a shared blown film production equipment for liquid crystal polymer film and TRX photoresist film. The use of blown film on blown method has solved the problem of directional instability in the flow extension method on the market. The present utility invention belongs to the preparation of a new material polymer compound film, which has the characteristics of high mechanical strength, uniform longitudinal and transverse tensile strength, and good bending resistance. It can be widely used in high-frequency and high-speed copper-clad laminates, solar cell backplates, and wireless charging insulation sheets. 5G mobile phone antenna. Camera soft board. Laptop transmission cable. Smart watch antenna and other fields; The TPX film produced synchronously has the characteristics of good peeling force, good flexibility, and high tensile strength, and can be used as a barrier film for copper-clad laminates. Broken by Europe and America. The equipment blockade that has been monopolized by South Korea and Japan. Due to LCP material. It has been surpassed by domestic polymer material enterprises. And it has been mass-produced and put into production application. Replaced materials from the United States and Japan.
LCP material is a high-performance functional engineering plastic. Liquid Crystal Polymer (LCP) was developed in the United States in the 1970s. A polymer material composed of rigid molecular chains that can exhibit both liquid fluidity and crystal anisotropy under certain physical conditions. Liquid crystal polymers have high strength, high modulus, outstanding heat resistance, extremely small coefficient of linear expansion, excellent flame resistance, electrical insulation, chemical corrosion resistance, weather aging resistance, microwave permeability, and excellent molding and processing properties. At the same time, liquid crystal polymers have a small dielectric constant and dielectric loss at high frequencies, making them particularly suitable for use as antenna substrates in 5G millimeter waves. LCP film has the characteristics of low dielectric constant, low dielectric loss, low water absorption, and stable performance, making it an ideal 5G high-frequency and high-speed FCCL substrate. LCP needs to go through the following steps from resin material to the final application of mobile phone antenna module: LCP resin film flexible copper-clad laminate FCCL flexible circuit board FPC antenna module. LCP resin is processed to obtain LCP film, which is then copper-clad by FCCL manufacturer to obtain FCCL. Soft board companies then process FCCL into FPC
The blown film method in the existing technology still has the following shortcomings in the preparation of LCP film by processing LCP resin:
The blown film method in the existing technology is difficult to restrict the shape of the inflated tube blank during the further blowing of the tube blank by injecting compressed air into the tube blank, which can easily cause wrinkles and uneven adhesion of the formed LCP film. Due to the obvious rigid molecular chain structure of LCP, it still has a crystal structure in the molten state and obvious formability in the direction of force, resulting in significant directional differences in the longitudinal and transverse directions, making its thin film processing extremely difficult. The present utility invention provides an upward blowing method and a bidirectional stretching inflation method, which solves the above-mentioned process drawbacks. Adopting a three-layer co extrusion composite process. Outer TRX. Intermediate LCP. Inner TRX. After coiling, peel off the inner and outer layers of TRX adhesive film.Finally, LCP material was obtained.
The equipment structure is as follows:
S0- Three extruders are placed in a T-shape below the bottom of the rack. The rack is a frame tower structure. Equipped with (pillars, platforms, handrails, guardrails, stairs). The extruder is made of. Composed of material barrel screw, weighing hopper, reducer, drive motor, screen changer, heater, cooling fan.
S1 mold adopts a central spiral+stacking+IBC internal circulation structure. Powered by a heater. Diverter. Composition of internal circulation device. The internal air outlet eliminates the hot air inside the membrane bubble. Inject internal air into external cooling air. Thereby improving the cooling and shaping speed of the film bubbles. Improve extrusion yield and foam transparency. Glossiness. Mechanical strength. Due to the fact that LCP material requires a temperature of around 350 degrees to plasticize. Therefore, conventional blown film cooling method cannot be used. Adopting IBC internal circulation method to help improve material orientation and processing performance. The mold is forged and tempered with special materials. Good rigidity. Not deformed.
S2- The wind ring adopts automatic adjustment. Adjust the film thickness deviation by heating method. Equipped with heating rods. Air duct diversion slot. Wind chamber.
S3- The stable foam rack has electric lifting. Electric telescopic diameter function. Equipped with a T-shaped lead screw. Nut. Guide roller. Chain wheel. Chain. Drive the motor.
The S4 thickness gauge adopts non-contact 360 degree center scanning measurement. Due to the adhesive properties of TRX materials at high temperatures. Using contact type will cause measurement errors in the sensor. Equipped with a conductive ring. Wireless WLAN. Rotating disk. Scan the bracket.
S5- The herringbone board has an electric opening and closing function. Spray PTFE on the surface of the guide roller. Reduce film adhesion and friction.
S6- Pull up the rotating part. Adopting a horizontal structure. Equipped with a rotating gear plate. Traction device. Fan shaped straight tooth mechanism. Air floating cooling roller. Air pump. Drive the motor. Spread the flat stick. Bracket platform.
S7- Heat treatment of longitudinally stretched parts. Equipped with steel bars. Drive the motor. Bracket platform. The steel rod is equipped with rotating interfaces at both ends. Connect the thermal oil circulation heating.
The S7 edge correction machine has the function of automatically tracking and identifying material edge errors. Composed of (ultrasonic sensor, servo cylinder, guide wheel, bracket, guide roller, flattening rod)
S8- Lower traction device. Equipped with a slitting knife. Tension sensor. Rubber stick. steel rod. Drive the motor. Reducer.
S9- Double station center friction winding part. AB rolls are placed independently. Equipped with a fully automatic robotic arm to lift the shaft. Thread the shaft. Unloading. Cutting function.
S10- Electrical control cabinet for thickness gauge. Unit auxiliary control cabinet. Place them separately on the ground. Easy to move and maintain.
S11- Unit heating control cabinet. Air cooler circulation device. Placed on the side rack platform. Save land area.
The process flow is as follows:
1. Use different grades of LCP. TRX. Resin raw materials and functional masterbatch and additives. Put in three extruder hoppers respectively. Place TRX inside and outside. Middle level investment in LCP. Through the weighing vector device. Accurately enter the heating material barrel screw according to the set ratio. The screw is driven to rotate by the driving motor. Heat the solid raw material and plasticize it into a solution. Enter the composite mold. Form a circular membrane embryo for ring assembly.
2. Multiple air inlet holes are distributed at the bottom of the mold. 2 blowers. Inject and remove compressed air. Enter the embryo and perform 3-10 fold lateral inflation. Adding air increases the diameter of the mold base. Conversely, it becomes smaller. The diameter of the embryo increases - the width of the membrane widens. Conversely, it narrows. The width of the membrane bubble is controlled by the cold and hot exchange cycle of two external blowers. Collect signals from three ultrasonic ranging sensors. After being operated by the PLC module system. Automatic control of frequency converter. Final control of fan speed. Synchronize closed-loop control of the air circulation flow inside the membrane bubble.
3. The embryo enters the wind ring vertically upwards. Stable foam rack. Thickness gauge. Cooling and shaping. Thickness measurement. Flatten the herringbone board into a sheet-like substrate. The thickness gauge measures the circumferential thickness deviation of the film bubble. Provide feedback to the control system. Through the CPU. After the collection card is operated. Control the power of the heating rod inside the wind ring. Thereby effectively and automatically controlling the uniformity of membrane bubble thickness.
4. The sheet substrate enters the first traction. Through a horizontal rotating mechanism. Forward and backward crossing. Changed the lateral fixation position of the membrane bubble. Improve the surface of the membrane bubble, prevent bursting and blistering.
5. After the sheet is pulled out from the first track. Enter the longitudinal stretching area. S-shaped multi stick interweaving. Perform 3-10 times longitudinal stretching. Finally, enter the winding and traction section. Perform edge breaking and segmentation. Form a single-layer substrate. Enter the winding process to retrieve cylindrical substrates.
6. Thickness gauge - installed above the stable bubble holder. Follow the circular rotation of the rotating frame. Scanning measurement of thin films. Measurement methods are divided. Non contact capacitive measurement.
7. The membrane bubble enters the winding area. According to the size requirements of the film specifications. Online cutting. The winding machine is equipped with a mechanical arm. Automatic cutting and material replacement. Equipped with (center+friction+clearance) control mode function
8. The device has. hommization. High degree of automation. Easy to operate. Advantages of high cost-effectiveness.
