A method for improving the performance of fracturing processes in oil production fields may rely on polymer coated particles carried in the fracturing fluid. The particles may include heavy substrates, such as sand, ceramic sand, or the like coated with polymers selected to absorb water, increasing the area and volume to travel more readily with the flow of fluid without settling out, or allowing the substrate to settle out. Ultimately, the substrate may become lodged in the fissures formed by the pressure or hydraulic fracturing, resulting in propping open of the fissures for improved productivity.

Hydraulic fracture composition and method

PROBLEM TO BE SOLVED: To provide water-permeable concrete which has a high permeability coefficient and high compressive strength and can easily be shaped. SOLUTION: The production process of the water-permeable concrete comprises: charging a mixed material of a composition consisting of 100 pts.vol. of coarse aggregate and 30-80% pts.vol. of paste or mortar, into a form to obtain a formed body; and curing the formed body; wherein the paste or mortar comprises 100 pts.wt. of cement or a powdery mixture containing cement, 0-300 pts.wt. of fine aggregate, 0.1-3.0 pts.wt. (expressed in terms of solid content) of a water reducing agent or AE water reducing agent (air entraining and water reducing agent) and 20-40 pts.wt. of water. COPYRIGHT: (C)2003,JPO

Water permeable concrete

The invention discloses a hot-melting pressure-sensitive adhesive for PVC (Polyvinyl Chloride) plastic floor tiles, comprising the following components in parts by weight: 5-10 parts of thermoplastic elastomer SBS792, 20-25 parts of thermoplastic elastomer SIS4211, 5-10 parts of petroleum resin ESCOREZ5020, 20-30 parts of petroleum resin ESCOREZ1000, 15-20 parts of petroleum resin ESCOREZ5000, 10-15 parts of rubber softening oil KN4010 and 0.2-0.5 part of composite antioxidant. The invention also discloses a preparation method of the PVC hot-melting pressure-sensitive adhesive. The hot-melting pressure-sensitive adhesive has better cohesive force and better initial viscosity even in winter; compared with an imported product, the hot-melting pressure-sensitive adhesive has low price and properties completely meeting the requirements.

Hot-melting pressure-sensitive adhesive for PVC (Polyvinyl Chloride) plastic floor tiles and preparation method thereof

An outlet stopper includes a cap part made of a resin and having a cylinder which has a screw thread on a side face thereof, and an outlet part made of a resin and having a disk flange which has a bottom face thereof coated with an adhesive. The disk flange has a hole at a center portion thereof. The outlet part has another cylinder which is placed on top of the disk flange and has a screw thread on a side face thereof which fits the screw thread on the cylinder in the cap part. An opening blade is fixed to the inside of the cap part, and a stopping ring which has a protrusion projected outward therefrom has a break therein for opening the ring and for stopping the insertion of the cap part and the outlet part into each other before reaching a fully screwed-in position. The outlet stopper can be easily attached with the adhesive to a package commercially available in a pouch form. By attaching the outlet stopper, packages made of soft plastic bags can be handled in the same manner as rigid packages having an outlet stopper, such as hard bottles. Thus, a major drawback of packages of a pouch form can be eliminated.

Outlet stopper for pouch-type fluid containers

Paper regulating mechanism in a paper feed cassette for accommodating paper sheets , has: a regulation guide plate disposed below a bottom plate, on which are placed the paper sheets, and formed with a slit having a predetermined width; upper plate-shaped portions against which the paper sheets come into abutment; lower guided portions disposed at the lower ends of said upper plate-shaped portions and so loosely fitted in said slit as to easily move; rollers connected to said upper plate-shaped portions or said lower guided portions and rotatably abutting against said regulating guide plate; and lock members for fixing said upper plate-shaped portions in arbitrary positions with respect to said regulation guide plate.

Paper regulating mechanism and paper cassette

PURPOSE:To sew seeds and rear seedlings of grains, vegetables, flowers, etc., without damaging the seedlings or roots by superposing a water-insoluble film having holes at parts corresponding to sites carrying seeds on the lower part of a water-soluble sheetlike support carrying the seeds, growing radicles and then removing the support. CONSTITUTION:A seeding sheetlike support 3 carrying seeds on a water-soluble or a water-dispersible sheetlike support 3 prepared from fibrous carboxymethyl cellulose and wood pulp, etc., as raw materials with a tacky agent is placed on an artificial culture medium composed of nursery mats 4, etc., to carry out germination of seeds and rearing of seedlings. In the process, a water-insoluble sheetlike film 1 such as a polyester having openings 2 at parts corresponding to the sites carrying the seeds of the support 3 is superposed and placed under the sheetlike support 3 carrying the seeds to grow roots. The sheetlike support 3 corresponding to parts other than the sites corresponding to the holes 2, together with the water-insoluble sheetlike film 1, is removed to sow seeds and rear seedlings without damaging the seedlings or seeds at the time of dividing at the time of planting in water culture of grains, vegetables, flowers, etc.

Method for sowing seed and rearing seedling using seeding sheet

PROBLEM TO BE SOLVED: To easily produce a high strength water permeable concrete excellent in water permeability. SOLUTION: The water permeable concrete is produced using 100 pts.wt. powder of cement or the like, 0-100 pts.wt. fine aggregate, 400-600 pts.wt. coarse aggregate, 0.1-1 pt.wt. thickening additive comprising a mixture of a water-soluble cellulose ether and water-soluble polysaccharides in a weight ratio of 10:90 to 30:70, 0.3-15 pts.wt. organic polymer, 0-1 pt.wt. water-reducing agent and 20-50 pts.wt. water. The surfaces of the aggregates are previously coated with water or an emulsion of the organic polymer or the like. COPYRIGHT: (C)2000,JPO

Thickening additive for water permeable concrete and production of water permeable concrete using same

PURPOSE:To obtain a self-adhesive compsn which can quickly be decomposed by microorganisms in soil or water and does not pollute the environment, and to provide a self-adhesive tape or sheet prepd from the compsn CONSTITUTION:This biodegradable self-adhesive compsn is prepd by compounding an elastomer-based self-adhesive compsn with at least one biodegradable substance within such an amt that the resulting compsn still retains satisfactory self-adhesive properties

Biodegradable self-adhesive composition and self-adhesive tape or sheet prepared therefrom

PURPOSE: To provide a pressure-sensitive adhesive sheet which can save materials used in a finish with a decorative wall material, a finish of exposing the aggregate of concrete for sight decoration, etc., and can save greatly the time and labor for such a finish. CONSTITUTION: The pressure-sensitive adhesive sheet is prepared by coating a flexible sheety substrate with a pressure-sensitive adhesive composition comprising 100 pts.wt. styrene/butadiene/styrene block copolymer, 80-140 pts.wt. 5C or 5-9C petroleum resin, 30-60 pts.wt. naphthenic oil, 30-60 pts.wt. aromatic oil, and 0.5-2 pts.wt. antideteriorant. COPYRIGHT: (C)1994,JPO&Japio

Pressure-sensitive adhesive sheet

PROBLEM TO BE SOLVED: To provide a simple method for an excellently finishing the washout water permeable concrete. SOLUTION: The wash-out water permeable concrete is finish-processed as follows. First, the water permeable concrete is placed, next, a sheet for carrying a setting retarder (or setting retarder-containing sheet) having water infiltrating property, water holding property and capable of being deformed corresponding to the unevenness of the surface of the water permeable concrete is brought into close contact with the water permeable concrete, a setting retarder 5 or water is sprayed on the sheet so as to infiltrate the setting retarder into the surface layer of the water permeable concrete, then the water permeable concrete is subjected to aging and an uncured cement on the surface is washed away to finish the wash-out water permeable concrete. COPYRIGHT: (C)2001,JPO

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Papers

Method for sowing seed and rearing seedling using seeding sheet

Thickening additive for water permeable concrete and production of water permeable concrete using same

Biodegradable self-adhesive composition and self-adhesive tape or sheet prepared therefrom

Pressure-sensitive adhesive sheet

Finishing method of wash-out water permeable concrete

映章 小林

Papers

Method for sowing seed and rearing seedling using seeding sheet

Thickening additive for water permeable concrete and production of water permeable concrete using same

Biodegradable self-adhesive composition and self-adhesive tape or sheet prepared therefrom

Pressure-sensitive adhesive sheet

Finishing method of wash-out water permeable concrete

映章小林