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1. WO2022004885 - POROUS POLYTETRAFLUOROETHYLENE MEMBRANE, GAS-PERMEABLE MEMBRANE, AND GAS-PERMEABLE MEMBER

Publication Number WO/2022/004885
Publication Date 06.01.2022
International Application No. PCT/JP2021/025189
International Filing Date 02.07.2021
IPC
C08J 9/00 2006.1
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H142
9Working-up of macromolecular substances to porous or cellular articles or materials; After-treatment thereof
B29C 55/12 2006.1
BPERFORMING OPERATIONS; TRANSPORTING
29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
55Shaping by stretching, e.g. drawing through a die; Apparatus therefor
02of plates or sheets
10multiaxial
12biaxial
C08J 3/20 2006.1
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H142
3Processes of treating or compounding macromolecular substances
20Compounding polymers with additives, e.g. colouring
C08J 5/18 2006.1
CCHEMISTRY; METALLURGY
08ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
JWORKING-UP; GENERAL PROCESSES OF COMPOUNDING; AFTER-TREATMENT NOT COVERED BY SUBCLASSES C08B, C08C, C08F, C08G or C08H142
5Manufacture of articles or shaped materials containing macromolecular substances
18Manufacture of films or sheets
Applicants
  • 日東電工株式会社 NITTO DENKO CORPORATION [JP]/[JP]
Inventors
  • 釜本 侑 KAMAMOTO Yu
  • 北川 寿恵 KITAGAWA Hisae
Agents
  • 鎌田 耕一 KAMADA Koichi
Priority Data
2020-11587103.07.2020JP
Publication Language Japanese (ja)
Filing Language Japanese (JA)
Designated States
Title
(EN) POROUS POLYTETRAFLUOROETHYLENE MEMBRANE, GAS-PERMEABLE MEMBRANE, AND GAS-PERMEABLE MEMBER
(FR) MEMBRANE POREUSE DE POLYTÉTRAFLUOROÉTHYLÈNE, MEMBRANE PERMÉABLE AUX GAZ, ET ÉLÉMENT PERMÉABLE AUX GAZ
(JA) ポリテトラフルオロエチレン多孔質膜、通気膜及び通気部材
Abstract
(EN) Provided is a porous polytetrafluoroethylene membrane for which the absolute value of the difference between the lightness of one principal side and the lightness of another principal side is at least 1.0. This lightness is the lightness L* in the CIE1976 (L*, a*, b*) color space stipulated in JIS Z 8781-4 : 2013. The porous polytetrafluoroethylene membrane may be colored black or grey. Coloration-induced reductions in the characteristics can be prevented with the porous polytetrafluoroethylene membrane that is provided.
(FR) La présente invention concerne une membrane poreuse de polytétrafluoroéthylène pour laquelle la valeur absolue de la différence entre la clarté d’un côté principal et la clarté d’un autre côté principal est d’au moins 1,0. La clarté est la clarté L* dans l’espace de couleur CIE1976 (L*, a*, b*) stipulé dans la norme JIS Z 8781-4:2013. La membrane poreuse de polytétrafluoroéthylène peut être colorée en noir ou en gris. Des réductions induites par la coloration dans les caractéristiques peuvent être évitées avec la membrane poreuse de polytétrafluoroéthylène.
(JA) 提供されるポリテトラフルオロエチレン多孔質膜における一方の主面と他方の主面との間の明度の差の絶対値は1.0以上である。ただし、前記明度は、JIS Z8781-4:2013に定められたCIE1976(L*,a*,b*)色空間の明度L*である。ポリテトラフルオロエチレン多孔質膜は、黒色又は灰色に着色されていてもよい。提供されるポリテトラフルオロエチレン多孔質膜では、着色による特性の低下を抑制できる。
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