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1. 发明申请

US20230112349A1 Air filtration material, device for decontaminating air by filtration and manufacturing method. 有权
公开(公告)号：US20230112349A1
公开(公告)日：2023-04-13
申请号：US17914254
申请日：2021-03-23
申请人： CELLULOTECH INC
发明人： Daniel SAMAIN
IPC分类号： B01D39/18 , B32B7/14 , B32B29/00 , B32B29/06 , A62B23/02 , A61L9/014 , D21H11/20 , D21H27/08 , B32B37/18 , B32B37/12
摘要： The invention relates to a filtering material permeable to air and impermeable to oral, nasal and/or ocular human liquid aqueous excretions, comprising at least one bundle, referred to as a hydrophobic bundle, of at least two hydrophobic sheets which are superimposed and each formed by porous paper, having a gsm substance less than 30 g/m2, each hydrophobic sheet being formed by cellulose fibres, referred to as cross-linked cellulose fibres, which are connected to each other by hydrogen bonds and by covalent bonds which are formed with at least one group of cross-linking atoms, characterised in that at least some of the hydroxyls of the cross-linked cellulose fibres which are not engaged in hydrogen bonds and which are accessible to the gases form a covalent bond with an acyl group with a hydrophobic chain.

2. 发明公开

US20230265613A1 PROCESS FOR ACYLATION OF A HYDROXYLATED SOLID MATERIAL 审中-公开
公开(公告)号：US20230265613A1
公开(公告)日：2023-08-24
申请号：US18020353
申请日：2020-08-13
申请人： CELLULOTECH INC , METIVET , Romain
发明人： Daniel SAMAIN
IPC分类号： D21H17/18 , D21H21/16 , D21H19/12 , D21H27/00
CPC分类号： D21H17/18 , D21H21/16 , D21H19/12 , D21H27/002
摘要： A process for acylation of a solid material (3, 9) bearing reactogenic hydroxyls includes at least one fatty acid chloride (1) is distributed at least on the surface of the solid material (3, 9) using a distributor device (2) having an application surface. At least one fatty acid chloride (1) is distributed at least on the surface of the solid material (3, 9) is heated at a temperature, referred to as acylation temperature, below the vaporization temperature of the at least one fatty acid chloride (1), so as to enable an acylation of the solid material (3, 9). A stream of a gaseous composition (6) is directed over the said solid material (3, 9) at the acylation temperature, so as to entrain at least one portion of gaseous hydrochloric acid (7) formed by the acylation reaction
The application surface of the distributor device (2) is a velvet provided with velvet filiform elements that are suitable for taking up the at least one fatty acid chloride (1) by contact with the at least one fatty acid chloride, and releasing at least one fatty acid chloride by bringing the filiform elements of the velvet into contact with the solid material (3, 9). The distribution step (12, 14) is carried out so as to distribute over the solid material (3, 9) an amount of the at least one fatty acid chloride (1) of between 20 mg/m2 and 1 g/m2 surface area of the solid material (3, 9).

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