Water-soluble polyvinyl alcohol film with plasticizer blend, related methods, and related articles

A technology of water-soluble film and polyvinyl alcohol, which is applied in the direction of detergent composition, chemical instruments and methods, detergent compounding agents, etc., and can solve the problems of weak, insoluble, and small bag leakage at the edge of heat-sealed parts

Active Publication Date: 2017-08-01
MONOSOL LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Although it is possible to create a strong seal by heat sealing the layers together, this can lead to problems such as weakness at the edges of the heat seal and leakage of the pouch
Additionally, heat sealing can induce additional crystallinity, resulting in a seal that is less soluble than a corresponding seal produced by solution sealing

Method used

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  • Water-soluble polyvinyl alcohol film with plasticizer blend, related methods, and related articles
  • Water-soluble polyvinyl alcohol film with plasticizer blend, related methods, and related articles
  • Water-soluble polyvinyl alcohol film with plasticizer blend, related methods, and related articles

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0224] Example 1: Plasticizer Blend Series 1

[0225] Example 1 represents a series of water soluble films based on PVOH homopolymer and three different plasticizers, including a blend of glycerin, sorbitol and one from a series of different polyol plasticizers. The PVOH homopolymer blend was 50% / 50% by weight of a first part hydrolyzed PVOH homopolymer having a 4% solution viscosity of 13 centipoise and a second part hydrolyzed PVOH homopolymer having a 4% solution viscosity of 23 centipoise blend. The film comprised (i) its corresponding PVOH homopolymer resin (100 parts by weight per hundred resin parts (phr)), (ii) glycerol plasticizer (21.7 phr), (iii) sorbitol plasticizer (5.7 phr) phr), (iv) polyol plasticizers (11phr), (v) modified starch fillers (about 2phr-4phr), (vi) surfactants and other processing aids (about 5phr-7phr) and (vii ) residual water. Polyol plasticizers are variously propylene glycol (PG), 2-methyl-1,3-propanediol (2M-1,3-PD), diethylene glycol (...

example 2

[0230] Example 2: Plasticizer Blend Series 2

[0231] Example 2 represents a series of water soluble films based on PVOH homopolymer and three different plasticizers, including glycerin, one from a series of sugar alcohol plasticizers, and a blend of propylene glycol (PG) or dipropylene glycol (DPG). compound. The PVOH homopolymer blend was 50% / 50% by weight of a first part hydrolyzed PVOH homopolymer having a 4% solution viscosity of 13 centipoise and a second part hydrolyzed PVOH homopolymer having a 4% solution viscosity of 23 centipoise blend. The film comprised (i) its corresponding PVOH homopolymer resin (100 parts by weight per hundred resin parts (phr)), (ii) glycerin plasticizer (21.7 phr), (iii) sugar alcohol plasticizer (5.7 phr ), (iv) propylene glycol or dipropylene glycol plasticizers (11phr), (v) modified starch fillers (about 2phr-4phr), (vi) surfactants and other processing aids (about 5phr-7phr) and ( vii) Residual water. Sugar alcohols are variously so...

example 3

[0234] Example 3: Plasticizer Blend Series 3

[0235] Example 3 represents a series of water soluble films based on PVOH copolymers and three different plasticizers, including glycerin, one from a series of sugar alcohol plasticizers, and a blend of dipropylene glycol. The PVOH copolymer blend is a first partially hydrolyzed PVOH copolymer comprising monomethylmaleate (sodium salt) comonomer (MMM) and acrylamidomethylpropanesulfonic acid (sodium salt) comonomer 80 wt% / 20 wt% blend of a second partially hydrolyzed PVOH copolymer of (AMPS). The film comprised (i) its corresponding PVOH copolymer resin (100 parts by weight per hundred resin parts by weight (phr)), (ii) glycerol plasticizer (16.2 phr), (iii) sugar alcohol plasticizer (10.4 phr) , (iv) dipropylene glycol plasticizer (10.4phr), (v) modified starch filler (about 2phr-4phr), (vi) surfactants and other processing aids (about 5phr-7phr) and (vii) residual water. Sugar alcohols are variously sorbitol (S), xylitol (X...

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Abstract

Disclosed herein are water-soluble films including a polyvinyl alcohol (PVOH) polymer and a combination of at least three plasticizers. The combination of plasticizers includes dipropylene glycol as a first plasticizer, a sugar alcohol such as sorbitol as a second plasticizer, and a polyol such as glycerin as a third plasticizer. When the PVOH polymer and plasticizers are blended in particular proportions and / or selected with regard to various criteria related to physical and chemical film properties, the resulting water-soluble film formed from the PVOH resin blend exhibits beneficial combinations four) of aged tensile strength, aged melting transition delta elevation, aged adhesion value, and / or resistance to seal peeling, which provide strong film seals that retain their water-solubility characteristics.

Description

technical field [0001] The present invention generally relates to water soluble films comprising a blend of polyvinyl alcohol (PVOH) resin and plasticizer and which can be used in contact with liquids, solids or combinations thereof. The invention further relates to a method of making said film and packets and pouches made from said film, optionally filled with active components such as cleaning agents to make metered dose pouches. More specifically, the present invention relates to having one or more benefits, such as improved physical and chemical properties for end use, specifically improved film seal strength and / or resistance to exposure to chemicals, after sealing to form a package or Altered resistance to solubility characteristics of both, as well as suitable processability of such films, packets and pouches. Background technique [0002] Water-soluble polymer films are commonly used as packaging materials to simplify the dispersion, pouring, dissolution, and dosing...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C08L29/04C08K5/06C08K5/053C08J5/18
CPCC08J5/18C08K5/053C08K5/06C08L29/04C08K2201/014C08L2203/16C08J2329/04C08J2329/02C11D17/043C11D17/044C11D17/042C11D17/045C08L101/14C08J2300/14C11D3/3753
Inventor 史蒂文·G·弗里德里希大卫·M·李雷吉内·拉比克弗洛伦斯·凯瑟琳·库尔谢
Owner MONOSOL LLC
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