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Electret Fiber Sheet
Abstract: The present invention provides an electret fiber sheet having superior recovery of airflow volume by heat treatment and having high airflow. This electret fiber sheet is a nonwoven fabric formed from long fibers that are formed from a thermoplastic resin and have an average single fiber diameter of 0.1 - 8.0 µm wherein the bulk density of the nonwoven fabric is 0.05 - 0.30 g/cm3 and the long fibers contain a crystal nucleating agent at 0.005 - 1.0% by mass.
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Notices, Deadlines & Correspondence
Notices, Deadlines & Correspondence
Patent Information
Application #
Filing Date
01 July 2019
Publication Number
27/2019
Publication Type
INA
Invention Field
TEXTILE
Status
Email
patent@depenning.com
Parent Application
Patent Number
Legal Status
Grant Date
2024-03-04
Renewal Date
Applicants
TORAY INDUSTRIES, INC.
1-1, Nihonbashi-Muromachi 2-chome, Chuo-ku, Tokyo 103-8666
Inventors
1. INABA, Sachio
f c/o Shiga Plant, Toray Industries, Inc., 1-1, Sonoyama 1-chome, Otsu-shi, Shiga 520-
8558
2. IYAMA, Yuji
f c/o Shiga Plant, Toray Industries, Inc., 1-1, Sonoyama 1-chome, Otsu-shi, Shiga 520- 8558
3. KOBAYASHI, Takuji
f c/o Shiga Plant, Toray Industries, Inc., 1-1, Sonoyama 1-chome, Otsu-shi, Shiga 520- 8558
Specification
WE CLAIM:
1. An electret fiber sheet which is a nonwoven fabric formed from long fibers that are formed from a thermoplastic resin and have an average single fiber diameter of 0.1 to 8.0 um, wherein a bulk density of the nonwoven fabric is 0.05 to 0.30 g/cm and the long fibers contain a crystal nucleating agent at 0.005 to 1.0% by mass.
2. The electret fiber sheet according to claim 1, wherein the long fibers are formed from a thermoplastic resin mainly including a polypropylene resin.
3. The electret fiber sheet according to claim 1 or 2, wherein the electret fiber sheet has a rate of increase in airflow volume after heat treatment at a temperature of 100°C of 130% or more.
4. An air filter medium formed from the electret fiber sheet according to any one of claims 1 to 3.
32
Documents
Orders
| Section | Controller | Decision Date |
|---|---|---|
Application Documents
| # | Name | Date |
|---|---|---|
| 1 | 201947026249-IntimationOfGrant04-03-2024.pdf | 2024-03-04 |
| 1 | 201947026249.pdf | 2019-07-01 |
| 2 | 201947026249-PatentCertificate04-03-2024.pdf | 2024-03-04 |
| 2 | 201947026249-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [01-07-2019(online)].pdf | 2019-07-01 |
| 3 | 201947026249-STATEMENT OF UNDERTAKING (FORM 3) [01-07-2019(online)].pdf | 2019-07-01 |
| 3 | 201947026249-2. Marked Copy under Rule 14(2) [16-02-2024(online)].pdf | 2024-02-16 |
| 4 | 201947026249-PROOF OF RIGHT [01-07-2019(online)].pdf | 2019-07-01 |
| 4 | 201947026249-FORM 13 [16-02-2024(online)].pdf | 2024-02-16 |
| 5 | 201947026249-PRIORITY DOCUMENTS [01-07-2019(online)].pdf | 2019-07-01 |
| 5 | 201947026249-FORM 3 [16-02-2024(online)].pdf | 2024-02-16 |
| 6 | 201947026249-Retyped Pages under Rule 14(1) [16-02-2024(online)].pdf | 2024-02-16 |
| 6 | 201947026249-POWER OF AUTHORITY [01-07-2019(online)].pdf | 2019-07-01 |
| 7 | 201947026249-Written submissions and relevant documents [16-02-2024(online)].pdf | 2024-02-16 |
| 7 | 201947026249-FORM 1 [01-07-2019(online)].pdf | 2019-07-01 |
| 8 | 201947026249-DRAWINGS [01-07-2019(online)].pdf | 2019-07-01 |
| 8 | 201947026249-Correspondence to notify the Controller [31-01-2024(online)].pdf | 2024-01-31 |
| 9 | 201947026249-DECLARATION OF INVENTORSHIP (FORM 5) [01-07-2019(online)].pdf | 2019-07-01 |
| 9 | 201947026249-US(14)-ExtendedHearingNotice-(HearingDate-02-02-2024).pdf | 2024-01-09 |
| 10 | 201947026249-COMPLETE SPECIFICATION [01-07-2019(online)].pdf | 2019-07-01 |
| 10 | 201947026249-REQUEST FOR ADJOURNMENT OF HEARING UNDER RULE 129A [08-01-2024(online)].pdf | 2024-01-08 |
| 11 | 201947026249-CLAIMS UNDER RULE 1 (PROVISIO) OF RULE 20 [01-07-2019(online)].pdf | 2019-07-01 |
| 11 | 201947026249-US(14)-HearingNotice-(HearingDate-11-01-2024).pdf | 2023-12-27 |
| 12 | 201947026249-FORM 3 [23-06-2023(online)].pdf | 2023-06-23 |
| 12 | Correspondence by Agent _Form 1_09-07-2019.pdf | 2019-07-09 |
| 13 | 201947026249-CLAIMS [04-08-2022(online)].pdf | 2022-08-04 |
| 13 | 201947026249-FORM 3 [09-08-2019(online)].pdf | 2019-08-09 |
| 14 | 201947026249-FER_SER_REPLY [04-08-2022(online)].pdf | 2022-08-04 |
| 14 | 201947026249-FORM 18 [09-10-2020(online)].pdf | 2020-10-09 |
| 15 | 201947026249-FORM 3 [04-08-2022(online)].pdf | 2022-08-04 |
| 15 | 201947026249-FORM 3 [12-10-2020(online)].pdf | 2020-10-12 |
| 16 | 201947026249-FORM 3 [02-06-2021(online)].pdf | 2021-06-02 |
| 16 | 201947026249-Information under section 8(2) [04-08-2022(online)].pdf | 2022-08-04 |
| 17 | 201947026249-OTHERS [04-08-2022(online)].pdf | 2022-08-04 |
| 17 | 201947026249-FORM 3 [01-02-2022(online)].pdf | 2022-02-01 |
| 18 | 201947026249-FER.pdf | 2022-02-14 |
| 19 | 201947026249-FORM 3 [01-02-2022(online)].pdf | 2022-02-01 |
| 19 | 201947026249-OTHERS [04-08-2022(online)].pdf | 2022-08-04 |
| 20 | 201947026249-FORM 3 [02-06-2021(online)].pdf | 2021-06-02 |
| 20 | 201947026249-Information under section 8(2) [04-08-2022(online)].pdf | 2022-08-04 |
| 21 | 201947026249-FORM 3 [04-08-2022(online)].pdf | 2022-08-04 |
| 21 | 201947026249-FORM 3 [12-10-2020(online)].pdf | 2020-10-12 |
| 22 | 201947026249-FER_SER_REPLY [04-08-2022(online)].pdf | 2022-08-04 |
| 22 | 201947026249-FORM 18 [09-10-2020(online)].pdf | 2020-10-09 |
| 23 | 201947026249-CLAIMS [04-08-2022(online)].pdf | 2022-08-04 |
| 23 | 201947026249-FORM 3 [09-08-2019(online)].pdf | 2019-08-09 |
| 24 | Correspondence by Agent _Form 1_09-07-2019.pdf | 2019-07-09 |
| 24 | 201947026249-FORM 3 [23-06-2023(online)].pdf | 2023-06-23 |
| 25 | 201947026249-CLAIMS UNDER RULE 1 (PROVISIO) OF RULE 20 [01-07-2019(online)].pdf | 2019-07-01 |
| 25 | 201947026249-US(14)-HearingNotice-(HearingDate-11-01-2024).pdf | 2023-12-27 |
| 26 | 201947026249-COMPLETE SPECIFICATION [01-07-2019(online)].pdf | 2019-07-01 |
| 26 | 201947026249-REQUEST FOR ADJOURNMENT OF HEARING UNDER RULE 129A [08-01-2024(online)].pdf | 2024-01-08 |
| 27 | 201947026249-DECLARATION OF INVENTORSHIP (FORM 5) [01-07-2019(online)].pdf | 2019-07-01 |
| 27 | 201947026249-US(14)-ExtendedHearingNotice-(HearingDate-02-02-2024).pdf | 2024-01-09 |
| 28 | 201947026249-Correspondence to notify the Controller [31-01-2024(online)].pdf | 2024-01-31 |
| 28 | 201947026249-DRAWINGS [01-07-2019(online)].pdf | 2019-07-01 |
| 29 | 201947026249-FORM 1 [01-07-2019(online)].pdf | 2019-07-01 |
| 29 | 201947026249-Written submissions and relevant documents [16-02-2024(online)].pdf | 2024-02-16 |
| 30 | 201947026249-POWER OF AUTHORITY [01-07-2019(online)].pdf | 2019-07-01 |
| 30 | 201947026249-Retyped Pages under Rule 14(1) [16-02-2024(online)].pdf | 2024-02-16 |
| 31 | 201947026249-PRIORITY DOCUMENTS [01-07-2019(online)].pdf | 2019-07-01 |
| 31 | 201947026249-FORM 3 [16-02-2024(online)].pdf | 2024-02-16 |
| 32 | 201947026249-PROOF OF RIGHT [01-07-2019(online)].pdf | 2019-07-01 |
| 32 | 201947026249-FORM 13 [16-02-2024(online)].pdf | 2024-02-16 |
| 33 | 201947026249-STATEMENT OF UNDERTAKING (FORM 3) [01-07-2019(online)].pdf | 2019-07-01 |
| 33 | 201947026249-2. Marked Copy under Rule 14(2) [16-02-2024(online)].pdf | 2024-02-16 |
| 34 | 201947026249-TRANSLATIOIN OF PRIOIRTY DOCUMENTS ETC. [01-07-2019(online)].pdf | 2019-07-01 |
| 34 | 201947026249-PatentCertificate04-03-2024.pdf | 2024-03-04 |
| 35 | 201947026249.pdf | 2019-07-01 |
| 35 | 201947026249-IntimationOfGrant04-03-2024.pdf | 2024-03-04 |
Search Strategy
| 1 | 201947026249E_11-02-2022.pdf |