Abstract: Methods for discharging high purity liquid chemicals from an inner container in a protective pressure container are disclosed. One end of a liquid-discharge pipe is guided to the exterior of the inner container while the other end is at the bottom of the inner container. The high purity liquid chemical is discharged due to (1) gas pressure from a gas from a source connected to the protective pressure container or (2) a pump associated with the liquid discharge pipe or (3) a gas from a source connected to the inner container. The inner container preferably is blow molded and has an olefinic resin inner layer, a solvent-barrier resin intermediate layer, and an external layer of a light-shielding substance-containing resin composition. The inner container has certain absorbance controls.

Abstract: There is herein provided a container for high purity liquid chemicals, which never deteriorates the quality of a liquid content and which is easy to handle.

Abstract: A blow molded container for high purity liquid chemicals having (1) an inner layer formed of a high purity resin comprising at least one member including olefinic polymers of ethylene, propylene, butene-1, 4-methyl-pentene-1, hexene-1 or octene-1 and copolymers of ethylene and olefins other than ethylene; (2) an intermediate layer of a solvent-barrier resin including polyamides, polyvinyl alcohols, poly(ethylene-co-vinyl alcohols), polyesters and polyphenylene oxides; and (3) an external layer formed of a light-shielding substance-containing resin composition. The lowest absorbance of the total layers of the container is greater than 2.0 measured at a wavelength of not more than 400 nm. The total layers also have an absorbance that does not exceed 1.62 measured at a wavelength of 600 nm. The container is especially good for holding photoresist liquids.

Abstract: A container does not cause any quality deterioration of high purity chemicals included therein during the storage and transportation thereof and is not easily broken. The container also permits easy and safe discharge of the high purity chemical. The container for a high purity chemical comprises a flexible internal container formed from a polyolefinic high purity resin and a gas-tight, self-supporting external container, which accommodates the internal container, wherein these internal and external containers are joined together in such a manner that the space formed between these two containers are arbitrary closed and opened so as to ensure the communication with the outside, a liquid-discharge pipe provided with a check valve connected to the pipe midway therein is gas-tightly inserted into the internal container down to the bottom thereof and a connector connected to a pressure source is fitted to the external container.