摘要:
A process for production of a nonwoven fabric, which comprises a step wherein a thermoplastic polymer is dissolved in a mixed solvent composed of a volatile good solvent and a volatile poor solvent, a step wherein the resulting solution is spun by an electrospinning method and a step wherein a nonwoven fabric accumulated on a collecting sheet is obtained, is employed to provide a nonwoven fabric having a surface area sufficiently large as a matrix for cell culturing in the field of regenerative medicine, with large gaps between filaments and a low apparent density suitable for cell culturing.
摘要:
A process for production of a nonwoven fabric, which comprises a step wherein a thermoplastic polymer is dissolved in a mixed solvent composed of a volatile good solvent and a volatile poor solvent, a step wherein the resulting solution is spun by an electrospinning method and a step wherein a nonwoven fabric accumulated on a collecting sheet is obtained, is employed to provide a nonwoven fabric having a surface area sufficiently large as a matrix for cell culturing in the field of regenerative medicine, with large gaps between filaments and a low apparent density suitable for cell culturing.
摘要:
Inorganic fibers consisting substantially of silicon, carbon, oxygen and a transition metal, having a fiber size of no greater than 2 μm and having fiber lengths of 100 μm or greater.
摘要:
A catalyst-supporting fiber structure having a catalyst supported on a fiber constituting a fiber structure having both thorough flexibility and catalyst supporting performance, wherein the fiber has an average fiber diameter of not more than 1 μm, and a fiber having a fiber length of not more than 20 μm is not substantially contained. Since the subject fiber structure is excellent in catalyst-supporting characteristic, for example, it is possible to provide a fiber structure having an extremely high ability to degrade harmful chemicals.
摘要:
Inorganic fibers consisting substantially of silicon, carbon, oxygen and a transition metal, having a fiber size of no greater than 2 μm and having fiber lengths of 100 μm or greater.
摘要:
A fiber structure is obtained by spinning of a solution of an L-lactic acid condensate and a D-lactic acid condensate by electrospinning. It is possible to provide a fiber structure comprising fibers with extremely small fiber diameters, as well as excellent heat resistance and biodegradability.
摘要:
The adhesive agent composition of the present invention comprises from 50 to 90% by weight of an acrylic adhesive agent, 2.5 to 50% by weight of a polyhydric alcohol-containing liquid component, and 0.01 to 10% by weight of a salt of a mono- to tri-valence metal of an aliphatic acid that contains a hydrocarbon group of 8 to 18 carbon atoms. The adhesive agent composition shows good adhesion, cohesive force and permeability, and an adhesive drug composition having the above properties can be prepared by adding a drug (medicine, etc.) to the adhesive composition. An adhesive tape excellent in permeability or an adhesive tape preparation excellent in permeability and cutaneous absorption of the drug can be produced by coating a substrate with the adhesive agent composition or adhesive drug composition.
摘要:
The gel adhesive of the present invention contains an elastomer component (A), a self-adhesive polymer component (B) compatible with the elastomer component (A), and a liquid component (C) compatible with the elastomer component (A) and the self-adhesive polymer (B), the liquid component (C) being held in a mixture of the elastomer component (A) and the self-adhesive polymer (B) without exuding, to form as a whole, a gel, and is useful for forming a self-adhesive layer of an adhesive material or a pharmaceutical-containing self-adhesive layer of an adhering pharmaceutical preparation, which layer is capable of being firmly adhered to a surface to be adhered, and particularly a body skin surface, and of being easily removed therefrom without leaving a portion of the layer on the adhered surface.
摘要:
An amphoteric ion-permeable composite membrane composed of a microporous substrate, and supported on the substrate, a thin amphoteric ion-exchange film formed of an active amino group-containing polymer which has been interfacially crosslinked at least at the surface portion of the thin film, said membrane being produced by forming a thin layer comprising an active amino group-containing polymer containing 1.0 to 23 milliequivalents/g, as amino equivalent, of an active amino group selected from primary and secondary amino groups and 0 to 18 milliequivalents/g, as amino equivalent, of a tertiary amino group and/or an ammonium salt group per molecule with the total amino content thereof being in the range of 2.0 to 23 milliequivalents/g on the microporous substrate and then contacting the thin layer on the substrate interfacially with a polyfunctional aromatic compound containing at least two functional groups selected from carbonyl halide groups, sulfonyl halide groups, carboxylic acid anhydride groups, sulfonic acid anhydride groups and derivative groups of carboxylic acids and sulfonic acids having equivalent reactivity to the aforesaid halide and anhydride groups.
摘要:
In a process for producing a semipermeable composite membrane which comprises forming on a microporous substrate a thin layer of a polymeric material comprising a polyamino polymer containing at least 1 milliequivalent, per gram of the polymer in the dry state, of active amino groups selected from primary amino groups and secondary amino groups, and thereafter interfacially crosslinking a surface portion of said thin layer with a crosslinking agent having at least two functional groups (a) capable of easily reacting with either the primary or secondary amino groups or both in said polymer; the improvement wherein(1) said polymeric material contains dispersed therein a polyfunctional compound having at least two functional groups (b) substantially incapable of reacting with the primary or secondary amino groups in said polymer at a temperature at which the interfacial crosslinking is carried out, but capable of reacting easily with either the primary or secondary amino groups or both in said polymer at a temperature at least 30.degree. C. higher than said crosslinking temperature, and(2) the interfacially crosslinked thin layer is heated to a temperature at which said polyfunctional compound reacts with the primary or secondary amino groups or both in said polymer.