Abstract: A check-valved pouch has a main pouch body, and a check valve attached to the main pouch body. The main pouch body is formed of plastic film and defines an opening for receiving a substance. The check valve is formed of plastic film also, and includes a flat valve body defining an upper opening, with opposte sides and a lower end closed, and an inner passage for discharging gases toward the upper opening. A check piece formed of plastic film is disposed in an upper half of the valve body. The check valve further includes a porous filtering film disposed on one surface in a lower half of the valve body. The filtering film includes a filter surface, and a releasing film formed on the filter surface. The check valve is attached to the main pouch body, with the filtering film inserted into the main pouch body and the upper opening exposed to ambient air, whereby an interior of the main pouch body is communicable with an exterior through the filter surface, inner passage and upper opening.

Abstract: A compressive sealed bag for compressible articles such as clothing comprising a sealed bag body of a plastic film having sealing fasteners formed at an opening portion of the bag body and a check valve formed with a flat pipe of a plastic film and provided at any marginal portions of the bag body other than the opening portion and having a base end inserted into the bag body and a tip end projecting to the outside for discharging the air from the bag body, said sealing fastener being provided at least two positions at the opening portion of the bag body, said tip end of the check valve provided at the marginal portion of the bag body being enveloped in a covering envelope of a plastic film having a discharge outlet of the air.

Abstract: The present invention provides a refractory coating composition comprising:(i) 100 parts by weight of a hydraulic cement,(ii) 3 to 50 parts by weight of a re-emulsion type powdery resin,(iii) 50 to 600 parts by weight of a mixture of 15 to 85% by weight of aluminum hydroxide powder and 85 to 15% by weight of carbonate decomposable at a temperature of 300.degree. to 1000.degree. C., and(iv) 20 to 300 parts by weight of a lightweight aggregate having open cells at a ratio of at least 50% based on the total cells.

Abstract: A paint peeling composition contains as effective components (1) a water-insoluble high polymer compound such as unreamelamine resin, chloroprene latex, EVA latex, or polystyrene; and (2) a substance containing as an effective component thereof, a component capable of forming a group of minute bubbles in an applied coating per se, e.g., a foamed or unfoamed hollow matter, or a chemical system capable of reacting to form a gaseous foam.

Abstract: A paint peeling composition containing as effective components thereof 17 to 25 weight parts of polyvinylalcohol and a substance capable of forming a group of minute bubbles. And, a paint peeling method wherein the paint peeling composition is applied to an object not to be painted and then is dried to form a coating thereon and after paint is adhered to the coating the adhered paint is exposed to a liquid prepared by water-diluting a paint re-adherence preventing composition containing as an effective component thereof polyvinylalcohol and prepared by being heated up to a predetermined temperature, thereby to peel off the adhered paint.