Invention Grant
- Patent Title: Meltblown nonwoven web comprising reclaimed polypropylene component and reclaimed sustainable polymer component and method of making same
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Application No.: US15112773Application Date: 2015-01-23
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Publication No.: US10240268B2Publication Date: 2019-03-26
- Inventor: Elena Novarino , David D. Newkirk , Helmut Hartl , Stefanie Streich
- Applicant: Fitesa Germany GmbH , Fitesa Simpsonville, Inc.
- Applicant Address: US SC Simpsonville DE Peine
- Assignee: FITESA SIMPSONVILLE, INC.,FITESA GERMANY GMBH
- Current Assignee: FITESA SIMPSONVILLE, INC.,FITESA GERMANY GMBH
- Current Assignee Address: US SC Simpsonville DE Peine
- Agency: Alston & Bird LLP
- International Application: PCT/US2015/012658 WO 20150123
- International Announcement: WO2015/112844 WO 20150730
- Main IPC: B29B9/06
- IPC: B29B9/06 ; B29B13/06 ; D01D1/04 ; D01D5/08 ; D01D5/088 ; D01D5/098 ; D01D5/26 ; D01D7/00 ; D01F1/10 ; D04H3/007 ; D04H3/011 ; D04H1/4291 ; D04H1/56 ; D04H1/4274 ; D04H1/435 ; D04H1/4266 ; D04H1/54

Abstract:
Process of preparing meltblown fibers that are reclaimed from a starting material of a polypropylene component and a sustainable polymer component is provided. In one aspect, the method includes blending starting fibers of a polypropylene component and a sustainable polymer component under heat to form a molten stream, and then vis-breaking the components to obtain a polymeric blend that is suitable for use in meltblowing applications. The molten stream of the vis-broken polymer components are extruded through a meltblowing die to form a stream of meltblown fibers that is then collected on a collection surface to form a coherent meltblown web. The starting material may be bicomponent filaments having a sheath-core configuration in which the polypropylene component is oriented in the sheath and the sustainable polymer component is oriented in the core of the filaments. The invention is also directed to meltblown fibers and webs prepared from the process.
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