- 专利标题: Multilayer thermoplastic film with improved puncture resistance performance
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申请号: US17264390申请日: 2019-08-20
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公开(公告)号: US11999139B2公开(公告)日: 2024-06-04
- 发明人: Nicolas Cardoso Mazzola , Sanjib Biswas , Jacquelyn A. deGroot , David T. Gillespie
- 申请人: Dow Global Technologies LLC
- 申请人地址: US MI Midland
- 专利权人: Dow Global Technologies LLC
- 当前专利权人: Dow Global Technologies LLC
- 当前专利权人地址: US MI Midland
- 代理机构: Brooks, Cameron & Huebsch, PLLC
- 国际申请: PCT/US2019/047143 2019.08.20
- 国际公布: WO2020/041233A 2020.02.27
- 进入国家日期: 2021-01-29
- 主分类号: B29C48/10
- IPC分类号: B29C48/10 ; B29C48/00 ; B29C55/28 ; B29D7/01 ; B32B7/12 ; B32B27/08 ; B32B27/30 ; B32B27/32 ; B29K23/00 ; B29K105/02 ; B29L31/00
摘要:
The present disclosure provides for a heat-shrinkable, biaxially stretched, multilayer thermoplastic film that includes at least a puncture resistant layer. The puncture resistant layer is formed with a polyethylene based plastomer having a density of 0.890 g/cm3 to 0.910 g/cm3 as measured in accordance with ASTM D-792, and a melt index (MI) as measured by ASTM D-1238 at 190° C./2.16 kg from 0.20 g/10 minutes to 1.5 g/10 minutes. The polyethylene based plastomer has a logM25% of an upper 25% of a GPC quadrant having a value of 5.1 to 5.7, an intermediate molecular weight distribution (Mw/Mn) of 2.5 to 3, a Mz/Mw value of 2 to 2.5, a Comonomer Distribution Constant value from 60 to 400 and a single SCBD peak between 40-85° C. with a mass fraction of less than 3% above 85° C. as determined by CEF, and a ZSVR value from 1.0 to 5.5. The multilayer thermoplastic film is biaxially stretched at a temperature of 60° C. to 120° C. with a blow-up ratio from 2:1 to 10:1.
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