Method for producing extruded resin sheet
A technology of resin boards and resins, applied in applications, household appliances, and other household appliances, etc., can solve the problems that the extruded resin board is difficult to peel off from the roller, the resin board needs time to cool down, and the production efficiency is reduced.
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[0081] Hereinafter, the present invention will be described in more detail with reference to Examples, but the present invention is not limited to the Examples. The composition of the extrusion equipment used in the following examples and comparative examples is as follows:
[0082]Extruder 1: screw diameter 100 mm, single screw, with vent (manufactured by Hitachi Zosen Corp);
[0083] Extruder 2: screw diameter 35 mm, single screw, with vent (manufactured by Hitachi Zosen Corp);
[0084] Feed manifold: Class 2 2-layer distribution (manufactured by Hitachi Zosen Corp);
[0085] Die 3: T-shaped die, lip width 1500 mm, lip gap 1 mm (manufactured by Hitachi Zosen Corp);
[0086] Rolls: Horizontal, three cooling rolls with a length of 1600 mm and a diameter of 300 mm.
[0087] Extruder 1, 2 and die 3 press figure 1 As shown in the arrangement, the feed diverter block is arranged at the specified position. Three cooling rolls, ie, first, second and third rolls named sequential...
Embodiment 1、2、4～11 and comparative example 1、2、5～12
[0118]
[0119] Resins of the kinds shown in Tables 1 and 2 were melt-kneaded in an extruder 1, and then sent to a feed manifold and a die 3 in sequence. Then, the molten thermoplastic resin 4 extruded through the die 3 is passed between first to third rolls to be molded and cooled. Extruded resin sheets having thicknesses shown in Tables 1 and 2 were thus obtained.
[0120] In the subcolumn of "Between the second and the third roller" in the "Roll configuration" column in Tables 1 and 2, the term "adhesion under pressure" refers to the The thermoplastic resin is further sandwiched between the second and third rolls to be shaped and cooled while being wound on the second roll. The term "releasing" means that the thermoplastic resin after being sandwiched between the first and second rolls is wound on the third roll to be molded and cooled without being sandwiched between the second and third rolls. The "surface temperature of the first roll", "the surface temperature of th...
Embodiment 3、12、13 and comparative example 3、4、13、14
[0122] Resins of the kinds shown in Tables 1 and 2 were melt-kneaded in an extruder 1 as a resin layer A, and then sent to a feed manifold. On the other hand, resins of the kinds shown in Tables 1 and 2 were melt-kneaded in the extruder 2 as the resin layer B, and then sent to the feed manifold. Co-extrusion molding was carried out so that the resin layer A sent from the extruder 1 to the feed manifold formed the main body layer, and the resin layer B sent from the extruder 2 to the feed manifold formed the surface layer (one side / upper side).
[0123] Then, the molten thermoplastic resin extruded through the die 3 is passed between the first to third rolls to be shaped and cooled. Extruded resin sheets of a double-layer structure having thicknesses shown in Tables 1 and 2 were thus obtained. "Thickness" in the column of extruder 1 and "thickness" in the column of extruder 2 in Tables 1 and 2 represent the thickness of the resin layer A and the thickness of the resin layer ...
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