Abstract: In a plate type membrane module in which a number of units, each comprising a membrane supporting plate with corrugated surfaces, and membranes formed on the corrugated surfaces, with permeate passageways between the membrane and the corrugated surfaces, are laminated in such a manner that passageways for a solution to be filtered are formed between the units. The waveforms of the confronted corrugated surfaces of adjacent membrane supporting plates are in same phase with each other. Thereby the pulsation of the solution and accordingly the vibration of the membranes can be effectively prevented, with the result that the membranes are prevented from early fatigue.

Abstract: A double-coated adhesive tape comprising a tape support having provided on both surfaces thereof a pressure-sensitive adhesive layer is disclosed. The tape support used is a thin non-woven fabric having specific properties. The tape has a flexibility and can be cut easily with fingers.

Abstract: A tape guide for magnetic tape cassettes, comprising a thermosetting resin composition, such as a polyester resin having a glass transition point of not lower than 100.degree. C. containing an inorganic filler such as silicon powder and, optionally, a resin powder such as a tetrafluorethylene resin powder in a proportion of from 60 to 75% by weight based on the total composition. The tape guide has an increased thermal conductivity of 10.times.10.sup.-4 cal/cm.deg.sec or more and a low coefficient of friction and is, therefore, free from undesirable frictional heat generation.

Abstract: A sulfonated polysulfone composite semipermeable membrane comprising a support membrane having laminated thereon in unity a semipermeable membrane composed of a sulfonated polysulfone formed by sulfonating a polysulfone composed of a recurring unit shown by formula (A) ##STR1## wherein n is an integer of 1 or more and process for producing the same.

Abstract: A process for preparing methyl 4-oxo-5-tetradecynoate useful as an intermediate for synthesizing (R,Z)-5-dec-1-enyl-oxacyclopentan-2-one, which comprises reacting monomethyl succinate with an alkyl chlorocarbonate in the presence of a base to form an acid anhydride and reacting the acid anhydride with a Grignard reagent of 1-decyne. Methyl 4-oxo-5-tetradecynoate can be prepared in high yields at high purities by this process.

Abstract: A composition for fixing metal powder molding at sintering, which is used, in the case of disposing a metal powder molding formed by rolling a mixture of a metal powder and a synthetic resin-based binder on a metal base material and sintering the metal powder molding in a non-oxidizing atmosphere, to adhere and fix the metal powder molding onto the base material until the metal powder molding is sintered by interposing between the metal powder molding and the base material, comprising a thermosetting resin composition containing a mixture of a thermosetting resin and at least one member selected from the group consisting of a metal fine powder, a thermoplastic resin and an adhesive material, wherein the amount of the residual carbon of the composition after completion of sintering is at least about 0.5% by weight.

Abstract: A process for purification of crude glyceride oil compositions which comprises diluting a crude glyceride oil composition containing gum material and wax as main components of impurities with an organic solvent, bringing the diluted crude glyceride oil composition into contact with a semipermeable membrane composed of polyimide consisting essentially of a repeating unit represented by the general formula: ##STR1## wherein R.sup.1 represents a divalent organic group, under pressure to obtain a semipermeable membrane permeable liquid in which the gum material in the glyceride oil after removal of said organic solvent is 100 ppm or less, carrying out bleaching of the glyceride oil obtained from said semipermeable membrane permeable liquid with at least one kind of an adsorbent selected from the group consisting of clay, activated clay, activated carbon and bone black, and then carrying out deodorizing to obtain a purified glyceride oil.

Abstract: A process for peeling a protective film off a thin article such as a silicon wafer is proposed. The film is peeled by sticking an adhesive tape to the protective film on the article and pulling it away from the article. The protective film is peeled only by the adhesive force of the adhesive tape.

Abstract: A precision filter for accomplishing filtering of precision of submicron order. A filter element of the filter consists of a plurality of superposed disc-shaped annular support members for filter membranes. Each support member has a radially outwardly extending intermediate section located between an annular boss section and an outer frame section. The intermediate section is formed on its upper and lower sides with a plurality of gently winding elongate ridges and largely winding elongate ridges. Each largely winding elongate ridge extends from the boss section to the outer frame section, but each gently winding elongate ridge located between the two largely winding elongate ridges is separate from the boss section thereby to form two elongate winding grooves which are joined and continuous to a central opening of the boss section.

Abstract: An oral bandage comprising a soft adhesive film comprising a mixture of a polycarboxylic acid and/or a polycarboxylic acid anhydride and a vinyl acetate polymer in a compatible state, and an oral preparation comprising such an oral bandage having incorporated therein a topical drug are disclosed. The oral bandage or preparation exhibits strong adhesion of long duration when applied to the oral mucosa or teeth.

Abstract: A process for removing electrolyte comprising forming a compartment for dealing with a liquid by juxtaposed arrangement of a first barrier across or through which a cation can be exchanged for hydrogen ion and a second barrier across or through which an anion can be exchanged for hydroxyl ion, forming a passage for acid solution outside the first barrier, forming a passage for alkaline solution outside the second barrier and inserting the liquid containing electrolyte into the compartment.

Abstract: A clonidine preparation for percutaneous administration comprising a support having provided thereon an active ingredient-containing layer is disclosed. The active ingredient-containing layer contains an acrylic polymer having a glass transition temperature of from -70.degree. C. to -10.degree. C. and pressure-sensitive adhesion at room temperature as a base, at least one of clonidine and clonidine hydrochloride as an active ingredient, and a decomposition inhibitor. The active ingredient can be stably maintained within the preparation without being decomposed, and, therefore, can be effectively released over a prolonged period of time.

Abstract: A porous polytetrafluoroethylene material produced by forming a mixture of an adequate amount of a liquid lubricant and polytetrafluoroethylene fine powder having an average molecular weight of at least 6,000,000, an amorphous index larger than 0.1 and a number average primary particle size of 0.1 to 0.8 microns, and a clear endothermic peak at a temperature of 347.+-.3.degree. C. and an another endothermic peak or shoulder at a temperature between 330.degree. C. and the temperature of said clear endothermic peak on a crystalline melting chart recorded by a differential scanning calorimeter, removing the lubricant to obtain an unsintered PTFE material and expanding the unsintered polytetrafluoroethylene material at least monoaxially at a temperature higher than the melting point of polytetrafluoroethylene.

Abstract: A polyimide molding powder and a process for producing the same are disclosed, said powder comprising an aggregate of polyimide particles, in which the whole or a large portion of said powder comprises polyimide particles composed of a particulate filler coated with a polyimide resin and/or polyimide particles composed of a fibrous filler coated with a polyimide resin, and said process comprising reacting an aromatic tetracarboxylic acid dianhydride and an aromatic diamino compound in an organic solvent to synthesize a polyimide precursor and imidating the polyimide precursor to precipitate polyimide particles, wherein a particulate filler and/or a fibrous filler dispersed in a prescribed amount of an organic solvent is or are added to the reaction system at any stage before the imidation of the polyimide precursor. The molding powder produces polyimide molded products free from brittleness and excellent in appearance, as well as various performance characteristics due to the improving effects of the filler.

Abstract: A polyimide powder which can provide a molding having excellent both strength and heat resistance by heat-press molding, and a method for producing such polyimide powder are disclosed. The polyimide powder comprises spherical polyimide particles having a particle size distribution of from 0.5 to 20 .mu.m and a mean particle diameter of from 1 to 15 .mu.m, and comprising a repeating unit represented by the formula ##STR1## wherein Ar represents an aromatic diamine residue.

Abstract: An improved tubular membrane filtration module including an outer cylinder and a plurality of water permeable non-woven fabric pipes formed on the inside thereof, the non-woven fabric pipes being inserted into the outer cylinder in a closely bundled state, the spaces between the fabric pipes and the outer cylinder at each end thereof being filled with hardened synthetic resin to fix and seal the assembly. The ends of the non-woven fabric pipes are coated with a resin such that the inside coating of resin at the end of the fabric pipes is less than that on the inside thereof.

Abstract: A composite release sheet material comprising a thermoplastic low-adhesive thin layer having a thickness of at least 5 .mu.m and a synthetic resin film layer having a greater tensile strength than the thin layer and, if desired, an anchor coat layer therebetween is disclosed. The composite release sheet material has an improved dimensional stability.

Abstract: An anti-inflammatory analgesic adhesive preparation is disclosed, comprising a flexible support having laminated thereon a pressure-sensitive adhesive material layer which contains a non-steroidal anti-inflammatory analgesic agent having salt form and an organic acid. This adhesive preparation has excellent percutaneous absorption properties.

Abstract: An anti-inflammatory analgesic adhesive preparation is disclosed, comprising a flexible support having laminated thereon a pressure-sensitive adhesive material layer which contains Diclofenac Sodium and an organic acid such as citric acid. This adhesive preparation has excellent percutaneous absorption properties.

Abstract: A composite semipermeable membrane and a process for preparation thereof are described, wherein said membrane comprises (1) a porous substrate, (2) an ultrathin film as a surface layer formed by polymerization by crosslinking of polyvinyl alcohol and an amino compound having at least two secondary amino groups using a polyfunctional crosslinking reagent capable of reacting with secondary amino groups and hydroxyl groups, and (3) a porous inner layer composed of water insoluble polyvinyl alcohol which is present between the porous substrate and the ultrathin film.