SEED Co.

Tokyo, Japan
Tokyo, Japan
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Patent
Seed Co. and Senju Pharmaceutical Co. | Date: 2017-02-22

The purpose of the present invention is to provide a polymer gel that can increase drug content ratio and reduce undesirable influence on gel strength and shape stability after the drug release, compared with the conventional techniques. The purpose can be achieved by an anionic drug-containing medical device comprising: (1) an anionic drug; and (2) a copolymer which contains, as constituents, a cationic monomer comprising a condensation product of an alkyl quaternary ammonium compound having a substituted or unsubstituted aralkyl group and (meth)acrylic acid or a salt of the condensation product and a monomer capable of copolymerizing with the condensation product or the salt of the condensation product.


Patent
Seed Co. and Senju Pharmaceutical Co. | Date: 2015-04-16

The purpose of the present invention is to provide a polymer gel that can increase drug content ratio and reduce undesirable influence on gel strength and shape stability after the drug release, compared with the conventional techniques. The purpose can be achieved by an anionic drug-containing medical device comprising: (1) an anionic drug; and (2) a copolymer which contains, as constituents, a cationic monomer comprising a condensation product of an alkyl quaternary ammonium compound having a substituted or unsubstituted aralkyl group and (meth)acrylic acid or a salt of the condensation product and a monomer capable of copolymerizing with the condensation product or the salt of the condensation product.


Patent
Seed Co., Japan National Institute of Advanced Industrial Science and Technology | Date: 2015-06-12

The purpose of the present invention is to provide: a functional polymer gel which is able to be practically used as an ocular lens having excellent transparency and mechanical strength by uniformly dispersing organic nanotubes in a polymer gel without the formation of agglomerates of the organic nanotubes in the case where the organic nanotubes are complexed into the polymer gel; and a method for producing this functional polymer gel. The above-mentioned purpose is achieved by: a functional polymer gel which is characterized by containing organic nanotubes and having a light transmittance of 80% or more; and a method for producing this functional polymer gel.


Patent
Seed Co., Japan National Institute of Advanced Industrial Science and Technology | Date: 2017-04-19

The purpose of the present invention is to provide: a functional polymer gel which is able to be practically used as an ocular lens having excellent transparency and mechanical strength by uniformly dispersing organic nanotubes in a polymer gel without the formation of agglomerates of the organic nanotubes in the case where the organic nanotubes are complexed into the polymer gel; and a method for producing this functional polymer gel. The above-mentioned purpose is achieved by: a functional polymer gel which is characterized by containing organic nanotubes and having a light transmittance of 80% or more; and a method for producing this functional polymer gel.


A recycled paper smoothing technology capable of regenerating the wet paper made and formed in the paper making process unit of the paper making unit securely as a smooth recycled paper free from wrinkle, in a very narrow used paper processing space of a used paper recycling apparatus of furniture size. A recycled paper smoothing unit (10) has a smooth surface belt (145) for conveying the wet paper (RP_(0)), and a belt guide unit (200 (180)) for conveying and guiding the smooth surface belt (145) in a state curved upward toward the running direction thereof, and the wet paper (RP_(0)) on the smooth surface belt (145) conveyed by the smooth surface belt (145) is provided with a tension uniformly in the conveying and running direction, by the running action of the smooth surface belt (145), and the curved shape of the smooth surface belt (145) due to the belt guide unit (200 (180)), so that a smooth recycled paper (RP) free from wrinkle is regenerated securely.


Patent
Seed Co. | Date: 2013-10-16

The purpose of the present invention is to provide a medical device for the controlled release of a drug suitable for an ophthalmic lens that, compared to a conventional contact lens for controlled release of a drug, releases a reduced initial controlled longer-release amount of the drug retained in the device and as a result, thus enabling longer-term controlled release of the drug in a therapeutically effective dose, such device having the same oxygen permeability as that a conventional SHGCL. The foregoing is accomplished by a medical device for the controlled release of a drug comprising an amphiphilic hydrogel that retains a drug, where the rate of controlled release of the drug is 50 wt% or less 24 hours after drug release is initiated.


Patent
Seed Co. and Senju Phamaceutical Co. | Date: 2014-05-29

The object of the present invention is to provide an annular device superior to a conventional annular device in the stability over an eyeball when being worn, which overcomes problems caused by wearing a conventional annular device. The above object is attained by preparing an annular device to be worn over the surface of the sclera, the annular device including an opening exposing the cornea and one or a plurality of approximately encircling grooves on an intermediate part between an inner rim part and an outer rim part. The annular device has a maximum thickness preferably in the intermediate part.


Patent
Seed Co. and Senju Pharmaceutical Co. | Date: 2016-04-13

The object of the present invention is to provide an annular device superior to a conventional annular device in the stability over an eyeball when being worn, which overcomes problems caused by wearing a conventional annular device. The above object is attained by preparing an annular device to be worn over the surface of the sclera, the annular device including an opening exposing the cornea and one or a plurality of approximately encircling grooves on an intermediate part between an inner rim part and an outer rim part. The annular device has a maximum thickness preferably in the intermediate part.


Disclosed is a hydrogel contact lens which has improved and long-lasting wettability in the surface and inner structures, while exhibiting excellent contamination resistance, shape stability and mechanical strength. Also disclosed is a method for producing the hydrogel contact lens. The wettable hydrogel contact lens is characterized by containing an ionic hydrophilic polymer which is a compound having a hydroxy group and an anionic group. The method for producing a hydrogel contact lens is characterized in that a constituent component of the hydrogel contact lens is a copolymer containing at least a cationic monomer and an anionic monomer, and in that the method comprises a step wherein counter ions of the monomers form ionic bonds and a step wherein an ionic hydrophilic polymer, which is a compound having a hydroxy group and an anionic group, is contained.


Patent
Seed Co. | Date: 2012-02-08

A pulp feeder capable of obtaining recycled paper of uniform texture, stable in the weight of the wet paper made on a mesh belt, in a very narrow used paper processing space of furniture size. A pulp feeding unit (pulp feeder) (15) includes a retention unit (113) disposed slidably on the upper side of an running mesh belt (105), for retaining a pulp suspension (PS) sent from a pulp manufacturing unit (2), and a paper making frame body (110) for defining the supply width (L) of the pulp suspension (PS) on the upper side of the mesh belt (105), in which the leading end position of this paper making frame body (110) is provided with an overflow unit (114) for keeping constant the water level (H) of the pulp suspension (PS) retained in the retention unit (113). The pulp suspension PS supplied in the retention unit (113) is retained to the water level (H) defined the overflow unit (114), and is uniformly dispersed and supplied on the upper side of the mesh belt (105) by cooperative action of this retention action and the running action of the mesh belt (105).

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