JP2528424B2 - Manufacturing method of three-layer laminate sheet - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for producing a three-layer laminate sheet in which a reinforcing sheet is sandwiched and a heat-meltable sheet having elasticity such as a soft polyurethane sheet is laminated and adhered on both sides thereof.

[0002]

2. Description of the Related Art A filmless flexible polyurethane foam sheet is used as a carrier for battery electrode plates of nickel cadmium batteries, lithium batteries, etc.
130393 gazette). This battery electrode plate is obtained by laminating a non-membrane polyurethane foam sheet on both sides of a mesh reinforcing sheet, plating the laminated laminate sheet, and processing it into a metal porous body. When used as a battery electrode plate, the porous structure is filled with active material powder. A polyurethane foam sheet (hereinafter referred to as a foam sheet) is usually formed into a sheet by slicing the surface of a polyurethane foam block slab-foamed in the longitudinal direction or by peeling the surface of a cylindrical block to produce a laminated laminate. On the other hand, the foam sheet is bound and laminated on the reinforcing sheet as a long sheet.

The foam sheet is usually 0.5 to 5 m.
The reinforcing sheet is used for the purpose of reinforcing it because it is sliced into a thickness of m, thin, soft and easy to stretch. The reinforcing sheet is a mesh sheet such as gauze and is laminated in a single layer or two layers in the laminating step. Its basic structure is a long laminated laminate sheet in which foam sheets are pasted on both sides of the reinforcing sheet. Is. In manufacturing a battery electrode plate, a long laminate is introduced into a plating tank and the foam sheet is continuously plated.

In order to produce a three-layer laminate sheet of a foam sheet and a reinforcing sheet, it is common that a roll coater is used to apply an adhesive to the sheet surface for adhesion, but it is used for the above purpose. At times, it is advantageous to use a so-called frame laminating method in which the surface of the foam sheet is melted by a flame and adhered to the reinforcing sheet in that the film-less foam state can be maintained.

A conventional three-layer laminate sheet manufacturing apparatus using the frame laminating method has a set of upper and lower three-stage pressure rolls 21 to 23, as shown in FIG. 4, and has upper and middle pressure rolls 21. Equipment equipped with a gas burner 24 on the side of the main body 22 is mainly used. When using this device, the foam sheet
5, the flame from the gas burner 24 is blown to the foam sheet 25 during the rolling of the roll surface of the upper crimp roll 21 and during the rolling of the roll surface of the middle crimp roll 22. When using, the laminated sheet 27 having the reinforcing sheets 26, 26 on both sides of the foam sheet 25 is processed, or the two-layer laminated sheet 27 in which the reinforcing sheet 26 is laminated on one surface of the foam sheet 25 as shown in FIG. It was limited to getting.

Further, when the conventional apparatus is used, the foam sheet 25 is fed from above the structural equipment and the laminated sheet 27 is fed from below, so that the carrying-out space for the laminated sheet 27 is provided below the lower pressure roll. Was installed, and the equipment was configured to convey the laminated sheet 27 to the take-up roll (not shown) at the end through the carry-out space.

Further, the upper pressure bonding roll 21 and the middle pressure bonding roll 22 shown in FIG.
There is also known an apparatus in which the lower pressure bonding roll 23 and the lower pressure bonding roll 23 are used as a second set, and the set of the rolls is arranged side by side as shown in FIG. 6, but when this device is used, the same as in FIG. First
The foam material 25 was fed in from above the pair of upper rolls 21, and the reinforcing sheets 26, 26 were laminated on both surfaces thereof, and the obtained laminated sheet 27 was limited to the application in the system for delivering downward. .

[0008]

When a conventional apparatus is used to manufacture a three-layer laminate in which foam sheets are laminated on both sides of a reinforcing sheet, the foam sheet 25 and the reinforcing sheet 26 are laminated as shown in FIG. The two-layer laminated sheet 27 thus obtained is once wound on a winding roll, and the laminated sheet 27 is again passed between the upper and middle pressure bonding rolls 21 and 22 as shown in FIG. The foam sheet 28 must be melted by the flame of the gas burner 24 and attached to the reinforcing sheet 26 surface of the laminated sheet 27 in two steps.

Of course, as shown in FIG. 8, a pair of crimping rolls are continuously provided in two stages in the front and rear, and the first set of upper and lower rolls 3
The first foam sheet 33 and the reinforcing sheet 34 are laminated between the set of 1 and 32, and then the upper and lower rolls 3 of the second set.
It is theoretically possible to stack the second foam sheet 37 through a set of 5,36.

However, as is apparent from FIG. 8, the position of the gas burner 38 provided in the set of the second-stage rolls 35 and 36 is directly below the two-layer laminated sheet 39 fed between the second-stage rolls. Therefore, the heat of the flame stays in the space below the laminated sheet 39, and the flame is sprayed onto the second foam sheet 37 that moves upward on the roll surface of the second lower roll 36 that turns upward. Heat rises to heat the seat surface excessively, and the seat surface is heated more than necessary, and it is difficult to melt the seat surface as designed. In particular, the battery plate usually has a thickness of 0.5.
Since an extremely thin sheet of ~ 5 mm is used, it may be damaged immediately when overheated.

An object of the present invention is to provide a method for laminating foam sheets on both sides of a reinforcing sheet continuously and smoothly in one step using a frame laminating method.

[0012]

In order to achieve the above object, in the method for producing a three-layer laminate sheet according to the present invention, a heat treatment is provided between a pair of pressure rolls that have a melting process and a pressure bonding process and that are continuously rotated. A method for producing a three-layer laminate sheet in which a fusible sheet and a reinforcing sheet are fed and the hot-melting sheet is attached to both sides of the reinforcing sheet, and the melting treatment of the hot-melting sheet is provided for each sheet. The first and second heat-fusible sheets are respectively fed to the roll surface of the pressure roll that rotates downward, and the sheet surface is melted by irradiating a flame during the turning, and the pressure treatment is performed by the first heat treatment. This is a process of stacking a reinforcing sheet on the melted sheet surface of the fusible sheet, stacking the second thermofusible sheet on the reinforcing sheet, and adhering them integrally, and laminating the first thermofusible sheet and the reinforcing sheet. Lamination of the laminated sheet and the second heat-fusible sheet, which performs simultaneously or separately,
The laminated sheet laminated in three layers is to be sent out upward between the pressure rolls which make a pair.

[0013]

The first and second heat-meltable sheets are fed from above into the space between the respective pressure rolls and are irradiated with flames from the gas burner in the downward feeding direction in accordance with the turning direction of the pressure rolls. For laminating the reinforcing sheet and the first and second heat-melting sheets, the first heat-melting sheet and the reinforcing sheet are first welded, and then the laminated sheet is secondly bonded.
In addition to welding the heat-meltable sheet of No. 1, the first and second heat-meltable sheets can be simultaneously welded to both surfaces of the reinforcing sheet.
The laminate sheet laminated in three layers is drawn out from between the pair of pressure bonding rolls to the upper space and fed to the winding roll.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. In FIG. 1, the first set of pressure bonding rolls 1 and 2, respectively
And the pair of second pressure bonding rolls 3 and 4 are arranged side by side. Gas burners 5 and 6 are respectively arranged on one side of the upper rolls 1 and 3 facing the roll surface for both sets, but for the upper rolls 1 of the first set, the right side in the drawing. , On the left side of the upper roll 3 of the second set. This structure is used in the upper roll 2 of the conventional device shown in FIG.
This is equivalent to one in which the set of 1 and the middle roll 22 is used for the first set, and the set of the middle roll 22 and the lower roll 23 is used for the second set.

While rotating the pair of upper and lower rolls of each set in the direction of the arrow in the figure, the first foam sheet 8 along with the reinforcing sheet 7 is rolled along the roll surface of the upper roll 1 of the first set. Prior to feeding between the two, the first foam sheet 8 moving downward due to the rotation of the upper roll 1 is irradiated with a flame from the gas burner 5 to melt a part of the surface, and the melted surface is reinforced sheet. Overlay on 7. The reinforcing sheet 7 and the first foam sheet 8 are provided on both rolls 1, 2.
The sheets are pressure-bonded to each other and integrated to form a two-layer laminated sheet 9, which is sent toward a pair of the second set of pressure-bonding rolls 3 and 4. At the time of feeding between the second set of pressure-bonding rolls 3, 4, the two-layer laminated sheet 9 is passed through the lower peripheral surface of the second set of lower rolls 4 from the outside (left side in the drawing) to between the upper and lower rolls 3, 4. At this time, in the two-layer laminated sheet 9, the surface of the reinforcing sheet 7 is the upper layer.

On the other hand, the second foam sheet 10 is fed into the upper roll 3 of the second set from above along the roll surface which rolls downward, and the second foam sheet 10 which moves downward in accordance with the rolling direction. The foam sheet 10 is irradiated with a flame from the gas burner 6, a part of the surface is melted, the melted surface is overlapped on the reinforcing sheet 7 surface of the two-layer laminated sheet 9, and pressure bonding is performed between the upper and lower rolls 3 and 4. The laminated sheet 11 adhesively laminated on the layers is pulled out upward and is transferred to a winding roll (not shown) through the space above the equipment. The obtained sheet is a three-layer laminated sheet 11 in which the reinforcing sheet 7 is sandwiched and the first and second foam sheets 8 and 10 are attached to both sides.

In the above embodiment, the pair of the first set and the second set of the pressure bonding rolls are combined side by side, but when the installation space can be secured vertically, the pressure bonding of the first set is performed as shown in FIG. The pair of rolls 1 and 2 may be arranged in the lower stage, and the pair of second pressure bonding rolls 3 and 4 may be arranged in the upper stage to be combined in the vertical direction.

FIG. 3 shows an example of using a pair of left and right pressure bonding rolls 12 and 13 which are combined side by side. In this embodiment, the first and second foam sheets 8 and 10 are respectively fed along the roll surfaces of the rolls 12 and 13 which are turned downward, and flames are radiated from the gas burners 5 and 6, so that both rolls 1
This is an example in which the first and second foam sheets are simultaneously attached to both sides of the reinforcing sheet fed between the second and the third sheets. Also in this example, the obtained three-layer laminate sheet 11 is sent upward between the rolls.

In the present invention, both the first and second foam sheets 8 and 10 are irradiated with flames from the side along the roll surface that rotates downward, and the surface is melted. Foam sheets supplied to
It is supplied from above with sufficient distance from the burner so that it is not affected by the flame. Further, the laminated sheets 11 laminated in three layers are further delivered upward so as not to interfere with the carry-in line of the first and second foam sheets. Therefore, in the present invention, the unloading line for the three-layer laminate sheet is a system that uses the space above the equipment.

[0020]

As described above, according to the present invention, it is possible to continuously produce a three-layer laminate sheet in which foam sheets are laminated on both sides of a reinforcing sheet by utilizing the space above the equipment. It is possible to obtain a carrier for a battery electrode plate which is reinforced by a reinforcing sheet using a non-membrane polyurethane sheet. The present invention is not limited to foam sheets, of course, and can be widely applied to general heat-melting sheets, has excellent dimensional stability, and can be used for producing laminated sheets reinforced by a core material for various purposes.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of the present invention.

FIG. 2 is a diagram showing a second embodiment of the present invention.

FIG. 3 is a diagram showing a third embodiment of the present invention.

FIG. 4 is a view showing an apparatus for manufacturing a conventional laminated sheet.

FIG. 5 is a diagram showing an example of manufacturing a two-layer laminated sheet using a conventional apparatus.

FIG. 6 is a diagram showing another example of manufacturing a conventional laminated sheet.

FIG. 7 is a diagram showing an example of manufacturing a three-layer laminated sheet using a conventional apparatus.

FIG. 8 is a diagram showing a problem when a conventional apparatus is used for producing a three-layer laminate sheet intended by the present invention.

[Explanation of symbols]

 1 1st set upper crimp roll 2 1st set lower crimp roll 3 2nd set upper crimp roll 4 2nd set lower crimp roll 5 Gas burner 6 Gas burner 7 Reinforcement sheet 8 First foam sheet 9 Two-layer stack Sheet 10 Second foam sheet 11 Three-layer laminate sheet 12 Left crimp roll 13 Right crimp roll

Claims (1)

(57) [Claims] 1. A three-layer structure comprising a melting treatment and a pressure-bonding treatment, wherein a heat-melting sheet and a reinforcing sheet are fed between a pair of pressure-bonding rolls that continuously rotate, and the heat-melting sheet is bonded to both sides of the reinforcing sheet. A method for manufacturing a laminated sheet, wherein the melting treatment of the heat-fusible sheet is performed by feeding the first and second heat-meltable sheets to a roll surface of the pressure roll, which is provided for each sheet, and which rotates downward. , A process of melting a sheet surface by irradiating a flame in the course of turning, and the pressure bonding process is to stack a reinforcing sheet on the molten sheet surface of the first heat-fusible sheet, and a second heat-fusible sheet on the reinforcing sheet. Is a process in which the first heat-melting sheet and the reinforcing sheet are laminated and the laminated sheet and the second heat-melting sheet are laminated simultaneously or individually. Stacked in three layers The laminate sheet is a three-layer laminate sheet producing method according to, characterized in that for sending upward from between crimping rolls paired.