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Microporous polyolefin resin sheet production device and production method

A polyolefin resin, technology for manufacturing equipment, applied in flat products, applications, coatings, etc., can solve problems such as contamination, sheet defects, etc.

Active Publication Date: 2017-05-10
TORAY IND INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

When a certain amount of liquid is stored, it will drip on the cooling and solidification device, pollute the cooling and solidification device where the sheets are tightly bonded, and cause defects in the sheets

Method used

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  • Microporous polyolefin resin sheet production device and production method
  • Microporous polyolefin resin sheet production device and production method
  • Microporous polyolefin resin sheet production device and production method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0058] A specific sheet manufacturing method in this embodiment is as follows.

[0059] (1) Sheet material

[0060] ·High-density polyethylene (HDPE): viscosity 1000Pa·s. Here, the viscosity is measured by the method of JIS K7117-2 on the condition of a shear rate of 100 / s and a temperature of 200 degreeC.

[0061] ·Liquid paraffin (LP): Dynamic viscosity 50cSt (at 40°C mm2 / s).

[0062] (2) Feeding

[0063] After the sheet material is dried, it is supplied to an extruder, and after passing through a gear pump and a filter, it is supplied to a die. In addition, the temperature of the device before reaching the die was set to 230°C.

[0064] (3) Die

[0065] The slit width was set to 300 mm, and the above-mentioned sheet material was discharged at a flow rate of 250 kg / hr. It should be noted that the concentration of LP in the polyolefin resin solution is 70% by mass, so 175kg / hr is LP. In addition, depending on the width of the sheet and the degree of decompression, 0.1% o...

Embodiment 2

[0074] Film formation was performed with the same apparatus configuration and film formation conditions as in Example 1 except that the following rectifying plates were used.

[0075] (rectifier plate)

[0076] Make the rectifying plate of square column type without arc at the bottom. The opening of the lower surface of the rectifying plate facing the cooling and solidifying device is defined as the aperture Holes with a pitch of 5 mm are processed along the entire width with the same length as the width and length of the die lip. In addition, the gap between the rectifying plate and the back of the sheet is set to 5 mm, the gap between the lower surface of the die and the upper surface of the rectifying plate facing it is set to 5 mm, and the cooling and solidifying device and the gap below the rectifying plate facing it are set to 5 mm. The surface gap is set to 10 mm, and it is placed in the decompression chamber in this manner. In order to depressurize the inside of th...

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PUM

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Abstract

The invention relates to a microporous polyolefin resin sheet production method. An object is to prevent the occurrence of sheet defects by preventing the dropping of a liquid of low-molecular-weight components in a polymer, diluents, and additives adhering to a rectifier disposed inside a decompression chamber in a production method for a microporous polyolefin resin sheet including discharging a solution including a mixture of a polyolefin resin and a diluent in a sheet shape from a mouthpiece to a cooling / hardening device and cooling the sheet while aspirating the air between the sheet and the cooling / hardening device with an aspiration chamber. Another object is to forcibly aspirate a liquid of low-molecular-weight components in a polymer, diluents, and additives adhering to the rectifier by, while using a production device for a microporous polyolefin resin sheet having a mouthpiece that discharges a liquid including a mixture of a polyolefin resin and a diluent in a sheet shape, a cooling / hardening device that cools the sheet discharged from the mouthpiece, and a decompression chamber that aspirates the air between the sheet and the cooling / hardening device, disposing a rectifier inside the decompression chamber, aspirating each of the inside of the decompression chamber and the inside of the rectifier, and keeping the pressure inside the rectifier lower than the pressure inside the decompression chamber.

Description

technical field [0001] The present invention relates to a manufacturing device and method of a microporous polyolefin resin sheet. Background technique [0002] The outline of a general resin sheet manufacturing apparatus will be described below. like Figure 6 As shown, the resin melted by the heat and shear force applied by the extruder 1 is discharged in a certain amount through the gear pump 2, and then the foreign matter and the like are filtered through the filter 3, and the resin is discharged from the die 4 with an arbitrary lip gap. For flakes. The discharged flaky molten resin is cooled and solidified by the cooling and solidification device 5 . Next, the cooled and solidified sheet 6 is stretched in an arbitrary direction at an arbitrary ratio by a stretching device 7 , and wound by a winder 8 . In addition, at this time, the thickness of the sheet in the width direction is measured by the thickness gauge 9, and based on the thickness measurement data, the lip ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29C47/88B29C41/24B29C41/34B29C47/08C08J9/28C08K5/00C08L23/00B29K23/00B29K105/04B29L7/00B29C48/08B29C48/28B29C48/305B29C48/355B29C48/885
CPCB29C41/24B29C41/34C08J9/28C08K5/00C08L23/00B29K2091/00B29K2105/0038B29K2023/06B29K2023/12B29K2025/06B29C2791/006B29K2105/041B29C48/92B29C48/022B29C48/08B29C48/0018B29C48/1472B29C48/25B29C48/27B29C48/272B29C48/274B29C48/28B29C48/302B29C48/355B29C48/387B29C48/69B29C48/768B29C48/914B29C48/916B29C2948/92152B29C2948/92514B29C2948/92647B29C2948/92923B29C2948/92961B29C48/885B29C48/88B29C48/30
Inventor 牧晃久北村理野村文保君岛康太郎
Owner TORAY IND INC
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