IP Library Granted Patent US 12,351,987
Granted Patent B2
US 12,351,987 · App. 17/738,173 · Granted Jul 8, 2025

Sustainably-sourced, high strength non woven

Inventor: Paul Latten (Clover, SC)
Assignee: Fybervek Holdings LLC
D21H5/202D21H15/02D21H21/18D21H27/005
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Quick Facts
Patent No.
US 12,351,987
App. No.
17/738,173
Granted
Jul 8, 2025
Kind
B2
Abstract

A nonwoven paper and method of manufacturing the same, where the nonwoven paper includes a thermally treated, wet-laid fiber mixture that includes a plurality of cellulosic fibers or pulp comprising about 60% to about 90% of the fiber mixture and a plurality of bicomponent binder fibers comprising about 10% to about 40% of the fiber mixture.

Claims (14)

1. A nonwoven paper comprising:

a thermally treated, wet-laid fiber mixture, the mixture including:

a plurality of cellulosic fibers or pulp comprising about 50% of the fiber mixture, wherein the plurality of cellulosic fibers or pulp includes a plurality of raw hemp fibers;

a plurality of lyocell fibers comprising about 25% to about 30% of the fiber mixture;

a plurality of bicomponent binder fibers comprising about 20% to about 25% of the fiber mixture;

wherein the thermally treated, wet-laid fiber mixture has an Elmendorf tear strength measurement of at least 230 grams force and a tear strength of at least 230 grams force.

2. The nonwoven paper of claim 1 , wherein the plurality of hemp pulp fibers is Abaca hemp pulp.

3. The nonwoven paper of claim 1 , wherein the plurality of bicomponent binder fibers each include a polyethylene terephthalate (PET) core component and a copolyethylene sheath component.

4. The nonwoven paper of claim 1 , wherein the plurality of bicomponent binder fibers further includes a maleic anhydride additive.

5. The nonwoven paper of claim 1 , wherein the thermally treated, wet-laid fiber mixture is at least two layers.

6. The nonwoven paper of claim 1 , wherein the thermally treated, wet-laid fiber mixture has a basis weight ranging between 25 GSM and 200 GSM.

7. The nonwoven paper of claim 1 , wherein the plurality of raw hemp fibers are cut to a length between about 18 mm and about 20 mm.

8. The nonwoven paper of claim 1 , wherein the thermally treated, wet-laid fiber mixture has a tensile strength of at least 10 pounds and an extension length of at least 1 inch.

9. The nonwoven paper of claim 1 , wherein the thermally treated, wet-laid fiber mixture had a thickness between 0.5 mm and 0.65 mm.

Assignments (1)
ASSIGNMENT OF ASSIGNOR'S INTEREST Recorded Sep 6, 2022
From: LATTEN, PAUL
To: FYBERVEK HOLDINGS LLC
Reel/Frame 060994/0578 →
Continuity (2)
Provisional Application 63185746 · May 7, 2021
Related Publication 20220364307A1 · Nov 17, 2022
References Cited (23)
US 6762138B2 · Ferreira · 2004 [cited by examiner]
US 10745836B2 · Dutkiewicz · 2020 [cited by examiner]
US 11180876B2 · Little · 2021 [cited by examiner]
US 11821119B2 · Little · 2023 [cited by examiner]
US 20120234748A1 · Little · 2012 [cited by examiner]
US 20200190739A1 · Qin · 2020 [cited by examiner]
US 20210362081A1 · Little · 2021 [cited by examiner]
US 20220364307A1 · Latten · 2022 [cited by examiner]
US 20240133092A1 · Little · 2024 [cited by examiner]
US 20240229312A9 · Little · 2024 [cited by examiner]
EP 0465203A1 · 1992 [cited by applicant]
EP 2077353A1 · 2009 [cited by applicant]
EP 1009705B1 · 2012 [cited by examiner]
EP 1891256 · 2012 [cited by applicant]
EP 1891256B1 · 2012 [cited by examiner]
EP 2456585B2 · 2017 [cited by examiner]
KR 101658628B1 · 2011 [cited by examiner]
WO WO2012129094A1 · 2012 [cited by examiner]
WO 2019210230A1 · 2019 [cited by applicant]
WO WO2022236005A1 · 2022 [cited by examiner]
WO WO2024097278A1 · 2024 [cited by examiner]
European Patent Office; International Search Report and Written Opinion issued in app. No. PCT/US2022/028004, 14 pages, dated Aug. 25, 2022. [cited by applicant]
Notification Concerning Transmittal of International Preliminary Report on Patentability issued for PCT Application No. PCT/US2022/028004; 11 pages; dated Nov. 16, 2023. [cited by applicant]