公开(公告)号：USD895901S1

公开(公告)日：2020-09-08

申请号：US29616041

申请日：2017-09-01

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Designer： Robert C. Coffin ,  Matthew V. Stonebraker, Jr. ,  Jacob H. Ely ,  Ravi Thomas

公开(公告)号：US20190256677A1

公开(公告)日：2019-08-22

申请号：US16308642

申请日：2017-06-14

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Joshua M. Fishman ,  Caitlin E. Meree ,  Ning Zhou ,  Derek J. Dehn ,  Jacob D. Young ,  Jeffrey O. Emslander ,  Bradley L. Givot ,  Aaron T. Hedegaard ,  Justin M. Bolton ,  Terry R. Hobbs ,  Mahfuza B. Ali ,  Robert C. Coffin ,  Brant U. Kolb ,  Paul D. Pennington ,  Jimmie R. Baran, Jr. ,  Duane D. Fansler ,  Ying Lin

IPC: C08J9/00 ,  C08L67/04 ,  C08L29/14 ,  C08J5/18 ,  C08J9/10 ,  A61F11/08 ,  A61F11/14 ,  G10K11/16

Abstract: Foam compositions are provided including a polylactic acid polymer; second (e.g., polyvinyl acetate) polymer having a glass transition temperature (Tg) of at least 25° C.; and plasticizer. Also described are articles comprising the foam compositions, such as a sheet or hearing protection article. Methods of making and using the foam compositions are further described herein.

公开(公告)号：US11786408B2

公开(公告)日：2023-10-17

申请号：US17754191

申请日：2020-09-24

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Jacob H. Ely ,  Robert C. Coffin ,  James D. Brown

IPC: A61F11/08 ,  B29C44/12 ,  B29C44/34 ,  B29C48/00 ,  B29C48/15 ,  B29C44/56 ,  B29K105/04 ,  B29K27/18 ,  B29K55/00 ,  B29K77/00

CPC classification number: A61F11/085 ,  B29C44/12 ,  B29C44/1204 ,  B29C44/1228 ,  B29C44/1271 ,  B29C44/348 ,  B29C44/3446 ,  B29C44/3461 ,  B29C44/5645 ,  B29C48/0012 ,  B29C48/15 ,  B29K2027/18 ,  B29K2055/00 ,  B29K2077/00 ,  B29K2105/04

Abstract: A push-in earplug is provided. The push-in earplug comprises an elongate core comprising a core material. The push-in earplug also comprises an outer layer comprising a foam material, the outer layer covering at least a portion of an outer surface of the elongate core. The push-in earplug also comprises a channel extending through the elongate core from a first end of the elongate core to the second end of the elongate core.

公开(公告)号：US20220296420A1

公开(公告)日：2022-09-22

申请号：US17754191

申请日：2020-09-24

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Jacob H. Ely ,  Robert C. Coffin ,  James D. Brown

IPC: A61F11/08 ,  B29C44/12

Abstract: A push-in earplug is provided. The push-in earplug comprises an elongate core comprising a core material. The push-in earplug also comprises an outer layer comprising a foam material, the outer layer covering at least a portion of an outer surface of the elongate core. The push-in earplug also comprises a channel extending through the elongate core from a first end of the elongate core to the second end of the elongate core.

公开(公告)号：US11407872B2

公开(公告)日：2022-08-09

申请号：US16308642

申请日：2017-06-14

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Joshua M. Fishman ,  Caitlin E. Meree ,  Ning Zhou ,  Derek J. Dehn ,  Jacob D. Young ,  Jeffrey O. Emslander ,  Bradley L. Givot ,  Aaron T. Hedegaard ,  Justin M. Bolton ,  Terry R. Hobbs ,  Mahfuza B. Ali ,  Robert C. Coffin ,  Brant U. Kolb ,  Paul D. Pennington ,  Jimmie R. Baran, Jr. ,  Duane D. Fansler ,  Ying Lin

IPC: C08L29/14 ,  C08J9/00 ,  A61F11/08 ,  A61F11/14 ,  C08J5/18 ,  C08J9/10 ,  C08L67/04 ,  G10K11/16 ,  A61F2/14 ,  C08J9/32 ,  A61F2/08 ,  C08J9/12

Abstract: Foam compositions are provided including a polylactic acid polymer; second (e.g., polyvinyl acetate) polymer having a glass transition temperature (Tg) of at least 25° C.; and plasticizer. Also described are articles comprising the foam compositions, such as a sheet or hearing protection article. Methods of making and using the foam compositions are further described herein.

公开(公告)号：US11304851B2

公开(公告)日：2022-04-19

申请号：US16643080

申请日：2018-08-30

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Robert C. Coffin ,  Matthew V. Stonebraker, Jr. ,  Jacob H. Ely ,  Jeff L. Hamer ,  Kenneth F. Teeters ,  Ravi Thomas

IPC: A61F11/08

Abstract: An earplug comprises a core and a sound-attenuating body attached to the core, the sound-attenuating body comprising a tip cavity extending proximally from the tip of the sound-attenuating body and comprising a distal opening. The tip cavity side wall includes a plurality of protrusions extending inwardly toward the longitudinal axis of the core. The plurality of protrusions may include from 2 to 12 protrusions. A method of making an earplug includes covering at least a portion of a core with a material including unactivated foaming agent; inserting an end of the core and at least a portion of the material into a mold cavity; and activating the foaming agent to create a sound-attenuating body. The sound-attenuating body has a base, tip, and tip cavity with a plurality of protrusions. The mold cavity may include a boss with a cup and plurality of cut-outs on the cup for forming the protrusions.

公开(公告)号：US20210322224A1

公开(公告)日：2021-10-21

申请号：US17304854

申请日：2021-06-28

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： James D. Brown ,  Feng Cai ,  Robert C. Coffin

IPC: A61F11/12 ,  B29C55/00

Abstract: An earplug assembly that includes an earplug. The assembly also includes a flexible cord extending from a first cord end to a second cord end and the first cord end fixed to the earplug, the flexible cord formed of copolymer comprising ethylene segments and vinyl acetate segments. The flexible cord has an elastic modulus of 10 MPa or greater at 100% elongation.

公开(公告)号：USD889754S1

公开(公告)日：2020-07-07

申请号：US29721057

申请日：2020-01-17

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Designer： Robert C. Coffin ,  Matthew V. Stonebraker, Jr. ,  Jacob H. Ely ,  Ravi Thomas

公开(公告)号：US20200179173A1

公开(公告)日：2020-06-11

申请号：US16643153

申请日：2018-08-30

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： James D. Brown ,  Feng Cai ,  Robert C. Coffin

IPC: A61F11/12 ,  B29C55/00

Abstract: An earplug assembly and method of forming the same is described. The method includes uniaxially stretching a cord formed of copolymer including ethylene segments and vinyl acetate segments to form a cold-drawn cord. The cold drawn cord has an elongation to break of 250% or less. The method then includes fixing the cold drawn cord to an earplug.

公开(公告)号：US20220354698A1

公开(公告)日：2022-11-10

申请号：US17754022

申请日：2020-09-15

Applicant: 3M INNOVATIVE PROPERTIES COMPANY

Inventor： Jacob H. Ely ,  Robert C. Coffin

IPC: A61F11/08 ,  B29B11/10 ,  B29C44/06

Abstract: A push-in earplug is provided. The push-in earplug comprises an elongate core comprising a first material and a second material. The push-in earplug also comprises an outer layer comprising a foamable material, the outer layer covering at least a portion of an outer surface of the elongate core. The second material is configured to thermally bond to the outer layer during activation of the foamable material.