A kind of hollow board and its production method
A production method and technology for empty boards, which are used in chemical instruments and methods, flat products, other household appliances, etc., can solve the problems of difficulty in lap jointing of lap joint profiles, poor vertical strength, and inability to be popularized, etc. Competitiveness, short molding cycle, the effect of reducing mold cost
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Embodiment 1
[0038] A continuous glass fiber reinforced polypropylene hollow board, the structure of which is as follows figure 1 shown. In this example, continuous glass fiber reinforced polypropylene is selected as raw material, 50 parts of polypropylene, 3 parts of grafting agent, and 0.5 parts of antioxidant are added to the extruder, and after stretching the fibers at the die head and through multiple mechanical rollers 50 parts of continuous glass fiber bundles are infiltrated and compounded, and then roll-formed to make a prepreg tape by roller winding and curling.
[0039] The specifications for making hollow boards are 2000mm*1500mm*10mm, and the preparation method is as follows:
[0040] (1) Cut the strip-shaped prepreg tape, and lay it in the direction of 0° / 90° according to the direction of the continuous fiber in the prepreg tape, and the laying thickness is 5mm;
[0041] (2) Evenly insert a 5mm diameter steel cylindrical core material sprayed with polytetrafluoroethylene in...
Embodiment 2
[0047] A continuous glass fiber reinforced polypropylene hollow board, the structure of which is as follows figure 2 shown. In this example, continuous glass fiber reinforced polypropylene is selected as raw material, 50 parts of polypropylene, 3 parts of grafting agent, and 0.5 parts of antioxidant are added to the extruder, and after stretching the fibers at the die head and through multiple mechanical rollers 50 parts of continuous glass fiber bundles are infiltrated and compounded, and then roll-formed to make a prepreg tape by roller winding and curling. The specifications for making hollow boards are 2000mm*1500mm*12mm, and the preparation method is as follows:
[0048] (1) Cut the strip-shaped prepreg tape, and lay it in the direction of 0° / 90° according to the direction of the continuous fiber in the prepreg tape, and the laying thickness is 5mm;
[0049] (2) After inserting a steel cylindrical core material with a diameter of 5mm wrapped by a PET film coated with a...
Embodiment 3
[0056] Continuous glass fiber reinforced polyamide hollow board. In this example, continuous glass fiber reinforced polyamide is selected as raw material. 50 parts of polyamide, 3 parts of grafting agent, and 0.5 parts of antioxidant are added to the extruder. The 50 parts of continuous glass fiber bundles after multiple mechanical rolling and stretching are subjected to impregnation and compounding, and then roll forming, and the prepreg tape is made by roller winding and curling. The specifications for making hollow boards are 2000mm*1500mm*10mm, and the preparation method is as follows:
[0057] (1) Cut the strip-shaped prepreg tape, and lay it in the direction of 0° / 90° according to the direction of the continuous fiber in the prepreg tape, and the laying thickness is 5mm;
[0058] (2) Evenly insert a steel square core material with a thickness of 5mm sprayed with polytetrafluoroethylene into the laid prepreg tape at a distance of 60mm, and then put it into the mold of the...
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