JPS5826452A - Manufacture of separator - Google Patents

Abstract

PURPOSE:To produce a sheet while bonding the electrode material through small amount of resin, by employing such structure where a pair of calender rolls and a cylinder are contacted tightly and the sheet is molded by extrusion through a piston. CONSTITUTION:A kneaded material 5 composed of the polytetraphloroethylene resin powder and an alcoholic lubricant is throughly mixed through such as a pressurizing kneader then filled into a cylinder 21 and extruded through a hydraulic piston 26 to a calender roll 22 to produce a sheet 27 which is further fed to the calender roll 23 to produce a sheet 28. Since a roll contacting section 24 of the shape shown by (c) and (d) is fixed to the cylinder 21, the sheet 27 is extruded with the limited width into the gap between the cylinder 21 and the roll 22 then the roll 22 will rotate to produce the sheet, the sheets 27, 28 can be produced continuously by the pressure of the piston 26 without causing the jamming, interruption or hole.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a separator that binds together 14 layers of resin using a relatively small amount of resin.

Conventionally, the method for binding separator materials such as carphone or inorganic compounds with resin powder such as polytetrafluoroethylene is to knead it with a column lubricant such as water or an organic compound solvent, and then knead it with a pair of calender rolls. extrusion,
After closing the notebook, the notebook was folded and extruded again at right angles to the previous extrusion direction, but the distance between the rolls was changed to obtain a durable sheet with a final thickness.

However, this method has the following deficiencies.

(1) Normally, in order to improve separator performance, the amount of binder used as a binder is kept as small as possible, so it is quite difficult to make and requires skill.

(2) Because it is a manual method, the properties are not stable (chips and widths are not constant).

(3) It takes a considerable amount of manufacturing man-hours, resulting in high costs.

The gap in explaining the conventional related methods specifically with drawings is
Figure 1 shows Polytetrafluor [Coechile/Resin 10L1]
96 is a schematic diagram of an apparatus for making a normal Teflon 7 raw tape. That is, polybutrough "eye" ethylene fat
Mix the fat paste and petroleum-based lubricant in a fletter, and put the Sentai Eki-shaped object 2 formed in the preform mold into the extruder filter.
A thin notebook-like raw tape was obtained through an extrusion calender roll 5 and a 11" roll 6 at a bistono 4 with the aid of a feeding speed.

In addition, 7 is Guile l-'r-y-le. The key to this manufacturing method is in the extruder. In the case of polytetrafluor['' ethylene or 101.196, the cross-sectional area of bisj.)4 is 1
In comparison, from the extrusion 1]8 with a small surface edge, it is extruded as a flexible round bar 9 shaped like a noodle, and finally a sheet 10 is formed.
It is possible to do this. However, since the resin arsenic used to bind the separator grains is 50941 or less even when filled with liquid, the structure of the extruder 5 described above cannot extrude without clogging before extrusion [-18]. It ran out and I couldn't get round bar 9 anymore.

In addition, the other 0) method is shown in Fig. 2 (as shown in Fig. 2, a rotary type 1 extruder 11 and a phantom calender roll 1 are combined to form a screw 5, a part of which is extruded from a blank with γ12, and 1 This is a device that forms a pair of calender rolls 16 into a shape and crushes them to obtain pellets. However, the extruded mixture will be sent out, so it will be a target. My friend told me that even in the case of a combination drug, I would probably get a C on sheet 15.However, when I actually tried this, I got no. Perhaps because of this, the above-mentioned Kichidojin 1st Calendar had the disadvantage that a hard lump formed in the front of the 13th wheel, causing a blockage and making it impossible to send out the calendar.

The present invention eliminates the above-mentioned drawbacks and will be explained in detail below with reference to Examples. .

Practical drawing 111: In the schematic diagram of the separator manufacturing apparatus as shown in Fig.
2.25 is the force l/tutah lnifur, 24 is the polybut trough 1-1 rJ ethylene, and the contact roll part with the shape shown in the diagrams c and d is shown, and 25 is the polybute trough []0 ethylene/resin m powder and alcohol-based moisturizer. 1 is a j-well mixture with aggregate, 26 is a hydraulic piston, and 27 and 28 are molded sheet-like separators. Regarding the manufacturing method, the kneaded a25 sufficiently kneaded with a pressurized kneader or the like is filled into the /su/tar 21, extruded with a hydraulic piston 26 to the calender ""-ru 22, and the sheet 27 is placed on the calender roll. 26 and get No. 1-28. / - The gutter 27 is provided in the gap between the linter 21 and the calender roll 22.
A contact roll portion 24 having the shape shown in is attached to the printer 21.
Therefore, the extrusion is limited to a certain cl]. In the method described in ``2'', the bis 1-2 is used to prevent clogging that occurs when the mixed wire 25 containing polytetrafluoroethylene is extruded from a narrow place as in the conventional device.
Since the mixed material 25 extruded in step 6 is pressed against the calendar roll 22 or turned into notes by rotating the calendar roll 22, the pressure of the screw 1-726 is sufficient to prevent clogging. That's C1-27.
28 can be obtained continuously without forming any breaks or holes. In addition, the force of force of =5-bis l-726 is 2 to 20 when using one of the above 1# kneaded materials.It can be done with a pressure of K17/C+7.2) If it is under 1g/C119, it is Due to lack of notebook pressure (I can't convert this continuous sea to 1~, and 2D
Kg/cJ or more -))/The feed of the tar roll may catch up, or the pressurizing force may be too thick and cause the breakdown of the tar roll (
This is connected.

Embodiment 2: Structural diagram of the cylinder shown in FIGS. 4a and 4b (as shown in FIG. This is effective when the sheet 27 extruded by the calender roll 22 is thick and difficult to apply back pressure to.

Example 5 = $5 1 Present of the separator manufacturing apparatus shown in Figure 1 In the figure, the extruded sheet 27 is folded and stored in the mold 60, and after being press-molded, the surface corresponding to the fold part is again -)) It is filled in the direction of the render roll 22 and extruded, and is effective for kneaded materials that cannot be molded by one extrusion.

Next, regarding the separator made by the conventional method A in which titanium oxide powder is passed through a calendar roll while folding by hand, and the method shown in Example 1, went. This is a separator for two reels and Shiihin city ponds. The separator is 1 titanium acid to 80 parts to 80 parts, Rough rj 1
．． 11 20 parts lJ of j-tylene powder wood [1, 0, 0 r
We obtain /-1- of nm 1. In addition, the extrusion pressure of the piston in method 13 is /Inside the linter: 5 Ky/per 5 folded surfaces
It is cJ.

As a result of the above, the number T when used is approximately 1/1f]Ll of method B or method A. Also, the table below shows the results of adjusting the field of upper air resistance.

Table (I played the same song 1[] times (]tsu I・Maharatsugi), that is,
As shown in the table above, the separator prepared by method B not only has a low electrical resistance value, but also is more stable than method A. Contains less. This is stable when produced in electric/b'II vinegar, and in method Δ IJ-
Depending on the type of kneading, it is difficult to knead the material (Jj, N is 1/-1~), and this occurs because the density becomes higher than necessary and the porosity becomes smaller.

In addition, the separator (・A is better than titanium oxide),
(Kochita/, Silicon, 7/Reminium, Makufushiuno 5
, Tsufuru/Uno 9, Hariu l, etc., acid mountains of various elements,
Other inorganic compounds, carbon and O-bolite 1-ra-7V
j+-" ethylene/, polyethylene, polypropylene, etc.? ! + Includes plastic inserts. Also, polyethylene 0
) θ[1] In the case of a thermoplastic resin, it is a matter of course that a part or the whole of the apparatus is heated as necessary.

The present invention is as follows:
(In order to interment the ashes of ``Ane'' and turn it into No. 1 ~ r, I put the Calendar 1TI-J of 1 Subaru 1 and 7 Linder in the gap 1
As a corner structure, the piston/(□This is a cracking method in which the lint is extruded.
The specified Sebarakun-1 is obtained, and the upper chestnut master value is ENT.

4 Figure, flute: Tsutsube Naetsu 1! 1 and 2 are schematic diagrams of a conventional binding device made of I-1, and FIGS. , Schematic diagram, Diagram C is 1 concubine 1-
FIG. 5d is a sectional view taken along the line aΔ-' in FIG.

・Extruder 5, 1 ro, 22, 2 ro Pugetsu 7
/Tarroll 12...Screw part 5'
f15,. 97, 28 No]・ 21・ Noritsuta 24 @ Roll part 25・ Kneaded material 26... Hydraulic piston output; Applicant: Yoasa Den/+h Co., Ltd. 9- No. e Li 2 No. 1. Figure 5

Claims (1)

[Scope of Claims] 1) A method for manufacturing a separator in which a pair of calenders is filled with a mixture in cylinders that are in close contact with the coal, and then pressurized with a piston and then molded with rotating calender rolls. 2) Inside the cylinder 6) A method for manufacturing a separator according to claim 1, which has a square or rectangular cross-sectional shape. 6) A method for manufacturing a separator according to claim 1, which contains a mixture or polytetrafluoroethylene resin powder. 4) 2 to 201 g/CIII per internal cross-sectional area of the piston
Q) A method for producing a separator according to claim 6, which is carried out under pressure. 5) A method for producing a separator according to claim 1, which includes a contact roll portion between the cylinder and the calender roll and is made of an ineffective polytetrafluoroethylene resin.