Toyobo Co., Ltd.

Teikoku Seiyaku Co., Ltd.

Hiroyuki Sakamoto

Takashi Koida

Hideo Isoda

Sadanobu Shirai

Masahiro Inazuki

Hiroyasu Sakaguchi

Miho Ishigure

Hideo Yoshida

Naofumi Minagawa

The present invention relates to a backing having a three-layer structure prepared by sticking together an inner fiber layer for holding a pasty preparation, a film layer having through-holes, and an air-permeable outer fiber layer which prevents leaking out of the pasty preparation or a liquid component exuded from the pasty preparation, and also relates to an aqueous patch using the backing which can be applied for a long time.

Backing having three-layer structure and aqueous patch using the backing

Provided is a thermocompression-bonding filament nonwoven fabric, which is inexpensive, has excellent molding properties and design properties, and is suitable as surface materials for automotive acoustic absorbing materials. The thermocompression-bonding filament nonwoven fabric comprising a polyester-based resin having a melting point of 250&#xb0; C. or more, wherein the filament nonwoven fabric has a weight of 20 to 80 g/m, a sum of 5% tensile loads in a MD and CD per weight of 1.0 to 1.9 (N/5 cm)/(g/m), and a 180&#xb0; C. dry heat shrinkage of 3.5% or less in both the MD and CD, and is not mechanically interlaced.

Thermocompression-bonding filament nonwoven fabric having excellent molding properties

The present invention relates to a backing for a water-based patch consisting of the following constituents, wherein the backing is excellent in pasty preparation retention and moisture retention, improves the persistence of drug efficacy by inhibiting the sublimation of the drug, gives neither restrained feeling nor rough feeling due to a thin thickness and an excellent elasticity, controls the moisture permeability, gives almost no sticky feeling and thereby gives an excellent feeling in application. A patch backing for a water-based pasty preparation consisting of a laminate, wherein the laminate consists of three layers, a film layer having through-holes is laminated between a nonwoven fabric layer A and a nonwoven fabric layer B, said film layer consists of a resin containing an olefin elastomer, the through-hole area per a hole is 0.02-0.18 mm, and the opening ratio of the through-hole is 1-10%.

Patch backing for water-based pasty preparation

The purpose of the present invention is to obtain a spunbonded nonwoven fabric, which comprises a single-component polyester-based fibers, having a high basis weight and a high rigidity by embossing, which is difficult to attain in the conventional art. Further, the present invention provides a filter base material having excellent pleatability, pleat retention property and durability, and a filter using thereof. The present spunbonded nonwoven fabric is obtained by subjecting a deposited fiber assembly to a thermocompression bonding by embossing with a pair of an embossing roll and a flat metal roll, and has a basis weight of 150 to 400 g/m, a longitudinal bending repulsion of 20 to 60 mN and a longitudinal tensile strength of 400 N/5 cm or more.

Growing community of inventors

Otsu, Japan

Hiroyuki Sakamoto