초록

Non-embossed film products permeable to moisture vapor and which act as barriers to liquid are made by a high speed method. The microporous products have high moisture vapor transmission rates (MVTRs) on the order of about 2000 to about 4500 gms/m2/day according to ASTM E96E.

대표청구항 ▼

Non-embossed film products permeable to moisture vapor and which act as barriers to liquid are made by a high speed method. The microporous products have high moisture vapor transmission rates (MVTRs) on the order of about 2000 to about 4500 gms/m2/day according to ASTM E96E. spool shape as inner si

Non-embossed film products permeable to moisture vapor and which act as barriers to liquid are made by a high speed method. The microporous products have high moisture vapor transmission rates (MVTRs) on the order of about 2000 to about 4500 gms/m2/day according to ASTM E96E. spool shape as inner side of spool is shorter than outer side when the honeycomb structure is cut by a plane perpendicular to the direction of the cells (passages); and a thickness of the cell wall having a shortest minor side, or a shortest minor base or a shortest inner side is identical to the basic cell wall thickness (Tc), by shortening the minor side of rectangle, or the inward minor base of inverse trapezoid or the inner side of spool one by one as said each cell wall is located more inwardly. 7. A ceramic honeycomb structure according to claim 1, wherein there is a relation shown by a formula: 1.10≤(Tr1＿Tr3-20)/Tc≤2.50 between the basic cell wall thickness (Tc) and said each cell wall thickness (Tr1＿Tr3-20). 8. A ceramic honeycomb structure according to claim 1, wherein there is a relation shown by a formula: 1.20≤(Tr1＿Tr3-20)/Tc≤1.60 between the basic cell wall thickness (Tc) and said each