发明名称 |
METHOD FOR PRODUCING A WET-LAID NONWOVEN FABRIC |
摘要 |
A method for producing a wet-laid nonwoven fabric for a semipermeable membrane supporting body, the method comprising: performing papermaking according to a wet papermaking method by using a fiber slurry containing a synthetic fiber as a main constituent fiber; drying the fiber slurry; subsequently subjecting the dried sheet to hot press processing two times by using a heat calender apparatus, wherein the hot press process temperature in the second treatments is adjusted to be higher by 10° C. or more than the hot press processing temperature in the first treatment, while treating the dried sheet by using a hard nip heat calender apparatus equipped with a combination of a metal roll and a metal roll for at least one time of the hot press processing; and thereby obtaining a wet-laid nonwoven fabric for a semipermeable membrane supporting body. |
申请公布号 |
US2016355961(A1) |
申请公布日期 |
2016.12.08 |
申请号 |
US201615244050 |
申请日期 |
2016.08.23 |
申请人 |
HOKUETSU KISHU PAPER CO., LTD. |
发明人 |
Soyama Toshihiko;Sakadume Nobuyuki;Nemoto Junji |
分类号 |
D04H1/732;D21H25/04;D21H13/24 |
主分类号 |
D04H1/732 |
代理机构 |
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代理人 |
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主权项 |
1. A method for producing a wet-laid nonwoven fabric for a semipermeable membrane supporting body, the method comprising:
performing papermaking according to a wet papermaking method by using a fiber slurry containing a synthetic fiber as a main constituent fiber; drying the fiber slurry; subsequently subjecting the dried sheet to hot press processing two times by using a heat calender apparatus, wherein the hot press process temperature in the second treatments is adjusted to be higher by 10° C. or more than the hot press processing temperature in the first treatment, while treating the dried sheet by using a hard nip heat calender apparatus equipped with a combination of a metal roll and a metal roll for at least one time of the hot press processing; and thereby obtaining a wet-laid nonwoven fabric for a semipermeable membrane supporting body. |
地址 |
Nagaoka-Shi JP |