FIELD: chemistry.
SUBSTANCE: invention relates to water-soluble films containing a polyvinyl-alcohol (PVOH) polymer and a combination of at least three plasticisers. Combination of plasticisers contains dipropylene glycol as the first plasticiser, a sugar alcohol, for example, such as sorbitol, as a second plasticiser, and a polyatomic alcohol, for example, such as glycerin, as a third plasticiser. If the PVOH polymer and plasticisers are mixed in certain proportions and/or selected based on various criteria associated with physical and chemical properties of the films, the obtained water-soluble film formed from said PVOH resin mixture demonstrates an advantageous combination of at least two properties: tensile strength after aging, increasing the delta of the first phase transition of melting after aging and the value of adhesion after aging.
EFFECT: technical result is possibility of obtaining welded seams of film, which are strong and preserve water solubility characteristics, for example, including seams between one and another film, which are formed without using thermal sealing, for example by solvent welding or soldering, and/or without application of heating.
46 cl, 10 dwg, 14 tbl, 6 ex
Title | Year | Author | Number |
---|---|---|---|
WATER-SOLUBLE FILM FROM POLYVINYL ALCOHOL MIXTURE, RELATED METHODS AND RELATED PRODUCTS | 2015 |
|
RU2701531C2 |
WATER-SOLUBLE FILM FROM POLYVINYL ALCOHOL MIXTURE, RELATED METHODS AND RELATED PRODUCTS | 2015 |
|
RU2712693C2 |
WATER-SOLUBLE FILM, FILM PACKAGES, AND METHODS FOR PRODUCTION AND APPLICATION THEREOF | 2017 |
|
RU2760028C2 |
WATER-SOLUBLE NONWOVEN FABRICS FOR PACKING AGGRESSIVE CHEMICALS | 2020 |
|
RU2824131C1 |
ARTICLES COMPRISING WATER-SOLUBLE POLYVINYL ALCOHOL BLEND FILM AND RELATED METHODS | 2015 |
|
RU2675519C2 |
WATER-SOLUBLE FILM, PACKAGES, IN WHICH FILM IS USED, AND METHODS FOR PRODUCTION AND APPLICATION THEREOF | 2016 |
|
RU2708047C2 |
ARTICLES CONTAINING A WATER-SOLUBLE FILM BASED ON POLYVINYL ALCOHOL AND A MIXTURE OF PLASTICISERS, AND METHODS FOR MAKING SAME | 2015 |
|
RU2687942C2 |
WATER-SOLUBLE FILMS, PACKAGES AND CONTAINER SYSTEMS | 2017 |
|
RU2767404C2 |
POLYVINYL ALCOHOL WATER-SOLUBLE FILM, RELATED TECHNIQUES AND RELATED PRODUCTS | 2019 |
|
RU2791028C2 |
NONWOVEN WATER-SOLUBLE COMPOSITE STRUCTURE | 2020 |
|
RU2821000C1 |
Authors
Dates
2019-11-12—Published
2015-10-13—Filed