The present invention provides a water-soluble film which comprises a modified polyvinyl alcohol containing an N-vinylamide monomer unit in an amount of 1 to 10 mole percent, and a carboxyl group and a lactone group in a total amount of 0.020 to 4.0 mole percent in the molecule, and having a degree of polymerization of 300 to 3000, and a degree of hydrolysis of 75 to 99.5 mole percent. Further, the present invention provides a package obtained by packaging an acidic substance, a chlorine-containing compound, or the like using the water-soluble film.

Water-soluble film and package using the same

A polyvinyl alcohol film which dissolves in water at 20° C. within 10 minutes and has an α/β ratio of not more than 10 wherein α is a storage modulus of the film at 20° C. in a dry atmosphere and β is a storage modulus of the film at 20° C. and 80% RH, and which has an excellent cold water solubility and an excellent durability such that the change in appearance of the film under high humidity is slight and the lowering of the cold water solubility is slight even if the film is stored for a long term.

Poly (vinyl alcohol) based film

Polyvinyl alcohol co-polymers comprising co-monomers of carboxylic acid and carboxylic acid derivatives wherein the co-polymers further comprise an amino functional monomer, and water-soluble films and pouches formed therefrom.

Polyvinyl alcohol co-polymer and water-soluble films and pouches formed therefrom

A portioned detergent composition in a bag of water-soluble film in which at least 70% by weight of the particles of the detergent composition have particle sizes above 800 μm. The choice of this particular particle size range eliminates otherwise typical production-related problems arising out of the permeability of the bag seams and resulting difficulties.

Portioned detergent composition

An oxidizing agent comprising a pre-measured amount of stabilized potassium hydrogen peroxymonosulfate in a water-soluble sealed pouch, said agent and pouch together having a specific gravity exceeding about 1.0, and a method for use of the oxidizing agent are disclosed.

Single dosage oxidizing treatment

PURPOSE:To obtain a separately packaged detergent comprising a film with excellent strength and water solubility and a detergent hardly caking by separately packaging a detergent composition having a specific absolute water amount and a specified amount of a nonionic surfactant with a specific water-soluble film. CONSTITUTION:(B) A detergent composition comprising B1: a surfactant composed of a nonionic surfactant as an essential component and B2: an crystalline or amorphous aluminosilicate, an inorganic salt such as carbonate and an auxiliary detergent builder such as sodium pyrophosphate is separated packaged with (B) a polyvinyl alcohol-based film having 10-150mum film thickness comprising A1: 100 pts.wt. polyvinyl alcohol modified with itaconic acid prepared by copolymerizing vinyl acetate with itaconic acid as essential monomers and saponifying and A2: 0.1-20 pts.wt. (co)polymer of a COOH-containing monomer (preferably acrylic acid or maleic acid) and/or is hydrate to give a separately packaged detergent having 90-3000 pts.wt. absolute water amount in the component B based on 100 pts.wt. of the film and 30-5,000 pts.wt. nonionic surfactant amount.

Separately packaged detergent using water-soluble film

PURPOSE:To provide the subject detergent whose contents consist of a composition with a nonionic surfactant as the main detergent, excellent in solubility at low temperatures, causing no bleeding of the nonionic surfactant to the outside of the film as the packaging material, also excellent in caking resistance. CONSTITUTION:The objective detergent can be obtained by subdividedly packing, with a water-soluble film 10-150mum thick, a detergent composition containing (A) a nonionic surfactant, (B) a porous oil-absorbing carrier, and (C) a crystalline aluminosilicate at specified proportion. This detergent has a numerical value of <=2.0g/cc calculated from the formula M/(mXV) [where, M is the nonionic surfactant content (wt.%); m is the porous oil-absorbing carrier content (wt.%); V is pore volume of the carrier (cc/g)].

Subdividedly packed detergent using water-soluble film

PURPOSE:To obtain a PVA composition providing characteristics of excellent surface appearance, film strength, chemical resistance such as acid resistance and alkali resistance, not bonding even at a high humidity, rapidly dissolving in cold water in use as a packing material, and to produce a film from the composition. CONSTITUTION:100 pts.wt. itaconic acid-modified polyvinyl alcohol is blended with 0.1-20 pts.wt. water-soluble polymer selected from a polymer of a carboxyl group-containing monomer, its copolymer and a neutralized material of the polymers having <=80mol% degree of neutralization to give a polyvinyl alcohol composition, and a film is obtained from the composition.

Tsutomu Nehashi

Papers

Separately packaged detergent using water-soluble film

Subdividedly packed detergent using water-soluble film

Polyvinyl alcohol composition and film obtained by using the same