Single-sided Release Paper Wrapping Roller and Double-Sided release Paper Wrapping Roller in the Preparation of Epoxy Resin Prepreg

The feature is that the device also includes a fiber woven fabric winding roller shaft 12, a spring 13, and an adjusting screw 21. The fiber woven fabric of the fiber woven fabric winding roller shaft 12 is arranged in the gap between the single side release paper winding roller shaft 1 and the double side release paper winding roller shaft 2. The fiber woven fabric winding roller shaft 12 is connected to the double side release paper winding roller shaft 2 through the fiber woven fabric transmission, The double-sided release paper winding roller shaft 2 is connected to the intermediate roller shaft 5 through the prepreg formed product, and the intermediate roller shaft 5 is connected to the product winding roller shaft 3 through the prepreg formed product. The intermediate roller shaft 5 is connected to the single side release paper and the single side release paper winding roller shaft 4 through the transmission,There is a spring 13 between the shaft ends of the single-sided release paper winding roller shaft 1 and the double-sided release paper winding roller shaft 2.

The adjusting screw 21 passes through the frame 22 and leans against the double-sided release paper winding roller shaft 2. The single-sided release paper winding roller shaft 1, the double-sided release paper winding roller shaft 2, the product winding roller shaft 3, the single-sided release paper winding roller shaft 4, the middle roller shaft 5, the first shaft 7, the second shaft 9, the third shaft 15, and the single-sided release paper winding feeding roller shaft 16 Both the double-sided release paper winding feed roller shaft 17 and the fiber woven fabric winding roller shaft 12 are installed on the frame 22. [0070] The device used for preparing the prepreg in this embodiment involves the impregnation process of epoxy matrix resin and fiber woven fabric, as well as the resin content control process of the prepreg in one step. Compared with existing hot melt prepreg production devices, the equipment and device manufacturing cost is lower, the production process is simpler, the production efficiency is higher, and the resin content control of the prepreg is more accurate.

In this embodiment, both single sided release paper winding roller shaft 1 and double sided release paper winding roller shaft 2 are equipped with closed cavities filled with circulating heating medium, and the two closed cavities are connected through pipelines.

The device of this embodiment further includes two baffles 20, with one baffle 20 at each end of the single sided release paper winding roller shaft 1 and the other at both ends of the double sided release paper winding roller shaft 2, used to block the overflow of the matrix resin.

Specific implementation method 22: This implementation method is an epoxy matrix resin, which is composed of 40 parts by mass of F-44 phenolic epoxy resin, 60 parts by mass of E-51 epoxy resin, 2 parts by mass of core-shell polymer, 16 parts by mass of 4,4 '- diaminodiphenylsulfone curing agent, 8 parts by mass of dicyandiamide curing agent, and 5.0 parts by mass of 3-phenyl-1,1-dimethylurea curing accelerator. The core-shell polymer is made of polybutadiene rubber soft core, Using polymethyl methacrylate as a hard shell.

The core-shell polymer described in this embodiment is added in the form of a parent mixture of Kane Ace MX-125 produced by Kaneka Company in Japan. The mass content of the Kane Ace MX-125 core-shell polymer is 25%, with a soft core of polybutadiene rubber and a hard shell of polymethyl propionate. The particle size is 100nmB-51, and the mass content of the epoxy resin is 75%.

The preparation method of the epoxy matrix resin according to this embodiment:
1. Weigh 40 parts of F-44 phenolic epoxy resin, 54 parts of E-51 epoxy resin, 8 parts of Kane Ace MX-125 matrix mixture produced by Kaneka Company in Japan, 16 parts of 4,4 '- diaminodiphenyl sulfone as a complex stabilizer, 8 parts of dicyandiamide curing agent, and 5.0 parts of 3-phenyl-1,1-dimethylurea curing accelerator by weight;
2、Mix 40 portions of F-44 phenolic epoxy resin, 54 portions of bisphenol A epoxy resin, and 8 portions of Kane Ace MX-125 matrix mixture produced by Kaneka Company in Japan, weighed in step 1, into a container, and then heat it to 150 ° C under stirring conditions. Then, add 16 portions of 4,4 '- diaminodiphenyl sulfone curing agent weighed in step 1, continue stirring and heating to 150 ° C, keep it warm for 3-5 minutes, and then cool to room temperature to obtain B-order resin;
3、Take 30 portions of the B-order resin obtained in step 2 and place them in a three-roller grinder. Then, add 8 portions of the dicyandiamide curing agent weighed in step 1 and 5 portions of the 3-phenyl-1,1-dimethylurea curing accelerator weighed in step 1. Grind them in a three-roller grinder for 4 times, and then add the remaining B-order resin prepared in step 2. Continue grinding them in a three-roller grinder for 4 times to obtain an epoxy matrix resin; The temperature of the three roller grinding machine mentioned in step three is maintained at 60-70 ° C. Among them, the number of parts in the B-order resin obtained from step two of the 30 parts mentioned in step three is the same as the benchmark used for weighing in step one.

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