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公开(公告)号：US20210115203A1
公开(公告)日：2021-04-22
申请号：US16500199
申请日：2018-03-19
申请人： DSM IP ASSETS B.V.
发明人： Brad Alan DICKINSON , Harm VAN DER WERFF , Raul Marcelino PEREZ GRATEROL , Petrus Henricus Maria ELEMANS , Leonardus Gerardus Bernardus BREMER , Francois Antoine Maria OP DEN BUIJSCH , Roelof MARISSEN
摘要： The invention relates to a composite sheet, and a ballistic resistant article, comprising unidirectionally aligned high performance polyethylene (HPPE) fibers and a polymeric resin, wherein said polymeric resin comprises a homopolymer or copolymer of ethylene and wherein said polymeric resin has a density as measured according to ISO1183 of between 930 and 980 kg/m3, and a peak melting temperature of from 115 to 140° C.; and said polymeric resin is present in an amount of from 5 to 25% by weight based on the total weight of the composite sheet. It further relates to a method for manufacturing a composite sheet comprising assembling HPPE fibers to a sheet, applying an aqueous suspension of a polymeric resin to the HPPE fibers, partially drying the aqueous suspension, optionally applying a temperature and/or a pressure treatment to the composite sheet.
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公开(公告)号：US20240255261A1
公开(公告)日：2024-08-01
申请号：US18565784
申请日：2022-06-03
申请人： DSM IP ASSETS. B.V.
发明人： Johann VAN ELBURG , Harm VAN DER WERFF , Reinard Jozef Maria STEEMAN , Brad Alan DICKINSON , Ulrich HEISSERER
CPC分类号： F41H5/0485 , B32B5/26 , B32B2250/20 , B32B2262/0253 , B32B2307/516 , B32B2307/72 , B32B2571/02
摘要： The invention concerns a ballistic-resistant molded article having an areal density of at least 7.0 and at most 12.0 kg/m2, comprising a consolidated stack of fibrous monolayers, each fibrous monolayer containing unidirectionally aligned high tenacity polyethylene filaments, the polyethylene filaments having a tenacity of at least 3.5 N/tex, wherein the molded article comprises between 5.0 and 20 wt % of a binder, wherein the molded article comprises at least 330 of said fibrous monolayers. The invention also relates to a ballistic-resistant sheet suitable to manufacture the molded article, wherein said ballistic-resistant sheet has an areal density of between 6 and 30 g/m2 per polyethylene filament monolayer present in the ballistic-resistant sheet. The invention further relates to a ballistic-resistant molded article whit improved performance when shot under an angle of 30 degree.
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公开(公告)号：US20230191666A1
公开(公告)日：2023-06-22
申请号：US16956087
申请日：2018-12-14
申请人： DSM IP ASSETS B.V.
发明人： Johann VAN ELBURG , Harm VAN DER WERFF , Roelof MARISSEN , Ulrich HEISSERER , Raul Marcelino PEREZ GRATEROL
CPC分类号： B29C43/003 , B29C43/52 , B29C43/203 , B29L2031/4821
摘要： The invention relates to a process for producing a ballistic-resistant curved molded article said process comprising forming a stack of a plurality of composite sheets, pressing the stack comprising the composite sheets at a temperature of between 80° C. to 150° C. and a pressure of between 10 and 400 bar for at least 5 minutes to obtain a curved molded article, cooling the compacted stack to a temperature below 80° C. while maintaining the pressure above 10 bar, releasing the pressure from the cooled curved molded article; wherein the composite sheets comprise unidirectionally aligned high tenacity polyethylene fibers and a matrix comprising a polyethylene resin being a homopolymer or copolymer of ethylene having a density of between 870 to 980 kg/m3 when measured according to ISO1183 and a melt flow index of between 0.5 and 50 g/10 min when measured according to ASTM 1238B-13 at a temperature of 190° C. and a weight of 21.6 kg.
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公开(公告)号：US20220339905A1
公开(公告)日：2022-10-27
申请号：US17855777
申请日：2022-06-30
申请人： DSM IP ASSETS B.V.
发明人： Johann VAN ELBURG , Harm VAN DER WERFF , Roelof MARISSEN , Ulrich HEISSERER , Raul Marcelino PEREZ GRATEROL
摘要： Composite sheets include at least two adjacent fibrous monolayers of unidirectionally aligned high tenacity polyethylene fibers, whereby the direction of orientation between the polyethylene fibers of said two fibrous layers differs by at least 80° and up to 90°, the fibers having a tenacity of at least 1.5 N/tex, the fibers being in a matrix comprising a homopolymer or copolymer of ethylene and wherein the homopolymer or copolymer of ethylene has a density as measured according to ISO1183 of between 870 to 980 kg/m3. The composite sheets have an areal density of between 50 and 500 g/m2, wherein the composite sheets have an areal density normalized in-plane shear force measured at 25° C. evaluated according to a bias extension test method variant of ASTM D3518 of at least 0.40 N·m2·g−1 and lower than 5.0 N·m2·g−1 at 10 mm clamp displacement and an areal density normalized in-plane shear force measured at 110° C. and clamp displacement of 10 mm of at least 0.01 N·m2·g−1 and lower than 0.20 N·m2·g−1.
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公开(公告)号：US20190284726A1
公开(公告)日：2019-09-19
申请号：US16318778
申请日：2017-07-21
申请人： DSM IP Assets B.V.
摘要： The present invention relates to a process for making high-strength polylactic acid elongated object comprising the steps of making a solution of polylactic acid in a solvent at a concentration of 5 to 50 mass %; spinning the solution through a spinplate comprising at least 1 spinhole to form a fluid elongated object; cooling the fluid elongated object with a cooling medium to form a solvent-containing gel elongated object; removing at least partly the solvent from the gel elongated object to form a solid elongated object; and drawing the elongated object while applying a draw ratio of at least 2, to form a high strength PLA elongated object, characterized in that the cooling medium has a temperature Tq of less than 0° C. The present invention also relates to gel-spun elongated objects comprising PLA with an IV in the range of 4-40 dl/g, and having a tenacity in N/tex such that Ten≥0.146*IV, as well as gel-spun elongated object having a tenacity and a filament titer in tex (t) such that Ten≥1.40*t −0.3. The invention also relates to articles containing said gel-spun elongated objects.
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公开(公告)号：US20220143950A1
公开(公告)日：2022-05-12
申请号：US17551142
申请日：2021-12-14
申请人： DSM IP ASSETS B.V.
IPC分类号： B32B5/12 , C08F110/02 , C08L23/06 , B32B27/12 , B32B37/10 , B32B7/09 , B32B7/12 , B32B27/32 , D02G3/02 , D01F6/04
摘要： Multifilament yarn containing n filaments are provided, wherein the filaments are obtained by spinning an ultra-high molecular weight polyethylene (UHMWPE), said yarn having a tenacity (Ten) as expressed in cN/dtex of Ten(cN/dtex)=f×n−0.05×dpf −0.15, wherein Ten is at least 39 cN/dtex, n is at least 25, f is a factor of at least 58 and dpf is the dtex per filament.
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公开(公告)号：US20210114340A1
公开(公告)日：2021-04-22
申请号：US16956094
申请日：2018-12-17
申请人： DSM IP ASSETS B.V.
发明人： Johann VAN ELBURG , Harm VAN DER WERFF , Roelof MARISSEN , Ulrich HEISSERER , Raul Marcelino PEREZ GRATEROL
IPC分类号： B32B5/26 , C08F210/02 , F41H5/04 , B32B5/12
摘要： The invention relates to a composite sheet comprising at least two adjacent fibrous monolayers of unidirectionally aligned high tenacity polyethylene fibers, whereby the direction of orientation between the polyethylene fibers of said two fibrous layers differs by at least 80° and up to 90°, the fibers having a tenacity of at least 1.5 N/tex, said fibers being in a matrix comprising a homopolymer or copolymer of ethylene and wherein said homopolymer or copolymer of ethylene has a density as measured according to IS01183 of between 870 to 980 kg/m3, said composite sheet having an areal density of between 50 and 500 g/m2 wherein the composite sheet has an areal density normalized in-plane shear force measured at 25° C. evaluated according to the bias extension test method of at least 0.40 N·m2·g-1 at 10 mm clamp displacement.
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