- Patent Title: System for producing chopped roving thermoplastic composite sheets
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Application No.: US17533333Application Date: 2021-11-23
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Publication No.: US12070933B2Publication Date: 2024-08-27
- Inventor: Mingfu Zhang , Jawed Asrar
- Applicant: JOHNS MANVILLE
- Applicant Address: US CO Denver
- Assignee: Johns Manville
- Current Assignee: Johns Manville
- Current Assignee Address: US CO Denver
- Agent Robert D. Touslee
- The original application number of the division: US16460603 2019.07.02
- Main IPC: B32B5/28
- IPC: B32B5/28 ; B29C70/12 ; B29C70/50 ; B32B27/12

Abstract:
A chopped roving thermoplastic composite sheet includes a web or mesh of chopped rovings and a thermoplastic resin that fully saturates the web or mesh of chopped rovings. The web or mesh of chopped rovings is not mechanically bonded and does not include a binder that bonds or adheres the chopped rovings together other than thermoplastic resin. As such, the thermoplastic resin and the web or mesh of chopped rovings are able to flow and conform to a mold or cavity when the chopped roving thermoplastic composite sheet is pressed within the mold or cavity and when the chopped roving thermoplastic composite sheet is heated to above the melting temperature of the thermoplastic resin.
Public/Granted literature
- US20220088900A1 SYSTEM FOR PRODUCING CHOPPED ROVING THERMOPLASTIC COMPOSITE SHEETS Public/Granted day:2022-03-24
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