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Polyolefin resin porous film

A technology of polyolefin-based resin and polypropylene-based resin is applied in the field of separators for lithium ion batteries, which can solve the problems of inability to coat the coating in thickness, not satisfying the coating adaptability, etc., and achieve the effect of full battery performance.

Active Publication Date: 2018-07-10
MITSUBISHI CHEM CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

If the spacer is stretched in the direction of conveyance, it will shrink in the direction perpendicular to the direction of conveyance to cause wrinkles, and it will not be possible to coat the coating with a uniform thickness, causing a problem of so-called unsatisfactory coating adaptability

Method used

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  • Polyolefin resin porous film
  • Polyolefin resin porous film
  • Polyolefin resin porous film

Examples

Experimental program
Comparison scheme
Effect test

Embodiment

[0144] Examples and comparative examples are shown below, and the polyolefin-based resin porous film of the present invention will be described in detail, but the present invention is not limited to these examples.

[0145] The obtained polyolefin-based resin porous membrane was measured and evaluated for various characteristics as follows, and the results are summarized in Table 1.

[0146] (1) Thickness

[0147] The measurement was performed at 10 positions in an unspecified plane with a dial gauge of 1 / 1000 mm, and the average value was taken as the thickness.

[0148] (2) Air permeability

[0149] The air permeability (sec / 100ml) was measured in a 20°C environment based on JIS P8117.

[0150] (3) 1% modulus in flow direction at 90°C

[0151] Based on JIS K7127, the tensile force at 1% elongation in the flow direction at 90°C was measured, and the 1% modulus in the flow direction at 90°C was calculated based on the following formula. In addition, the results of evaluati...

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PUM

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Abstract

The object of the present invention is to provide a porosity polyolefin-based resin that has high shrinkage stress, is less prone to wrinkling in the conveying process under high-temperature environments, has excellent coating adaptability, and maintains connectivity and has excellent air permeability characteristics. membrane. The polyolefin-based resin porous film of the present invention is characterized in that the 1% modulus in the flow direction at 90° C. is 4.5 MPa or more, and the air permeability is 800 seconds / 100 ml or less.

Description

technical field [0001] The present invention relates to a polyolefin-based resin porous film, which can be used as a packaging, sanitation, livestock, agricultural, construction, medical, separation film, light diffusion plate, battery separator, and is particularly suitable as a coating Separator for layered lithium-ion batteries. Background technique [0002] Lithium-ion secondary batteries have been used in batteries for portable devices such as OA, FA, home appliances, and communication equipment in the past, and research has also been carried out in the field of large-scale batteries that involve environmental issues such as electric vehicles and emergency power supplies. develop. [0003] In these large-scale battery applications, higher safety, larger capacity, higher output power, and higher voltage than small-sized batteries are required, and improvement of each battery component is being studied. In order to use batteries for electric vehicles, which have attract...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C08J9/00H01M2/16H01M50/403H01M50/406H01M50/417H01M50/449H01M50/457H01M50/489
CPCC08J2323/02H01M10/05H01M10/052B29K2023/12B29K2105/04B29L2031/3468C08J5/18Y02E60/10H01M50/403H01M50/449H01M50/411C08J5/2231C08J9/00H01M50/417H01M50/489H01M50/406H01M50/457H01M50/491B29C55/143C08J2323/12
Inventor 山田刚干宇佐见康竹川浩司
Owner MITSUBISHI CHEM CORP
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