公开(公告)号：WO2021133463A1

公开(公告)日：2021-07-01

申请号：PCT/US2020/058100

申请日：2020-10-30

申请人： UNITED STATES GYPSUM COMPANY

发明人： LI, Qinghua ,  HEMPHILL, Mark K. ,  CHRIST, Brian J. ,  LORING, Curtis B.

IPC分类号： B32B3/26 ,  B32B5/14 ,  B32B5/20 ,  B32B13/08 ,  B32B29/00 ,  D21H19/54 ,  E04C2/04 ,  C04B24/38 ,  B32B2038/166 ,  B32B2250/02 ,  B32B2250/03 ,  B32B2250/26 ,  B32B2255/12 ,  B32B2255/20 ,  B32B2260/044 ,  B32B2307/536 ,  B32B2307/546 ,  B32B2307/72 ,  B32B2307/722 ,  B32B2607/00 ,  B32B29/002 ,  B32B29/005 ,  B32B3/266 ,  B32B38/0036 ,  B32B43/003 ,  B32B5/145 ,  C04B2111/0062 ,  C04B28/14 ,  C04B28/145 ,  D21H17/28 ,  D21H27/30 ,  E04C2/043

摘要： Disclosed are a composite gypsum board and a method of preparing gypsum board. The board contains at least one set gypsum layer sandwiched between face and back cover sheets. The set gypsum layer is formed from at least stucco and water. The stucco material generally includes a high salt impurity content, for example, when the stucco is calcined from certain sources of low-quality synthetic gypsum. For example, in some embodiments, the salts are chloride salts, e.g., sodium chloride (NaCl), potassium chloride (KCl), magnesium chloride (MgCl2), and/or calcium chloride (CaCl2). The board and methods improve the bond between the gypsum layer(s) and at least one of the cover sheets (e.g., the back cover sheet). Also provided are methods and systems relating to drying gypsum board.

公开(公告)号：WO2021126952A1

公开(公告)日：2021-06-24

申请号：PCT/US2020/065272

申请日：2020-12-16

申请人： 4C AIR, INC.

发明人： LIAO, Lei ,  ZHAO, Mervin ,  WANG, Qiqi ,  XIAO, Wang ,  WANG, Haotian

IPC分类号： B01D71/34 ,  B32B27/02 ,  B32B27/08 ,  B01D69/10 ,  G02B1/10 ,  B32B2307/72 ,  B32B2307/724 ,  B32B2307/732 ,  B32B2327/12 ,  B32B27/12 ,  B32B27/32 ,  B32B7/12

摘要： A breathable film includes a substrate, a membrane disposed on the substrate, and an adhesive interposed between the substrate and the membrane. The membrane includes a plurality of fibers of polyvinylidene fluoride. The breathable film has an air transmission rate equal to or greater than 4000 ml/min/cm2 under air pressure of 70 mbar.

公开(公告)号：WO2021126458A1

公开(公告)日：2021-06-24

申请号：PCT/US2020/061304

申请日：2020-11-19

申请人： EXXONMOBIL CHEMICAL PATENTS INC.

发明人： MEI, Yuan ,  SHEN, Zhi-Yi ,  MU, Jiao Xiao

IPC分类号： C08L23/08 ,  B32B27/08 ,  C08J5/18 ,  B32B2250/03 ,  B32B2250/246 ,  B32B2307/72 ,  B32B2307/732 ,  B32B27/32 ,  C08L2203/162 ,  C08L2205/025 ,  C08L23/0815 ,  C09J2301/122 ,  C09J2301/312 ,  C09J2423/04 ,  C09J7/29 ,  C09J7/35

摘要： Provided herein are films comprising a core layer sandwiched between an outer layer and a sealing layer. The film has a seal initiation temperature at 5 N/15 mm between about 82°C and about 88°C, a 1% secant modulus m MD between about 300 MPa and about 400 MPa, and plateau seal strength at between about 16 and about 17 N/15 mm. While the outer layer and core layers comprise polyethylene compositions, the sealing layer comprises a polyethylene blend. The polyethylene blend comprises a plastomer and a polyethylene composition in an amount equal to or less than 50 wt%.