Water-soluble films and water-soluble unit dose articles made therefrom

A water-soluble film, water-soluble polymer technology, applied in detergent materials, detergent compositions, chemical instruments and methods, etc., can solve problems such as incomplete film dissolution

Pending Publication Date: 2022-07-22
THE PROCTER & GAMBNE CO
0 Cites 0 Cited by

AI-Extracted Technical Summary

Problems solved by technology

This has been found to be extremely challenging, as, for example, water-soluble films exhibiting excellent dissolution characteristics tend to be extremely sensitive to premature ruptu...
View more

Abstract

The present invention provides water soluble films and unit dose articles made therefrom wherein the water soluble films comprise a water soluble polymer wherein the water soluble polymer comprises a blend of a caseinate polymer and a polyvinyl alcohol homopolymer.

Application Domain

Surface-active detergent compositionsDetergent mixture composition preparation +1

Technology Topic

Water soluble polymersSoluble Film +4

Image

  • Water-soluble films and water-soluble unit dose articles made therefrom
  • Water-soluble films and water-soluble unit dose articles made therefrom

Examples

  • Experimental program(1)

Example Embodiment

[0078] Example
[0079] testing method :
[0080] 1. Membrane disintegration time :
[0081] According to the MSTM-205 disintegration protocol, the cold water film disintegration characteristics of different sodium caseinate/polyvinyl alcohol homopolymer water-soluble films were determined in demineralized water at 10°C. Within this test, the average membrane rupture time (in seconds) has been recorded for 3 replicates.
[0082] 2. Membrane dissolution time :
[0083] The cold water solubility characteristics of different sodium caseinate/polyvinyl alcohol homopolymer based water-soluble films were determined in demineralized water at 20°C by Monosol using a dissolution chamber according to MSTM-119 Standard Test Method for Residues. In this test, the average % dissolved film after 10 minutes of immersion in water has been recorded for 3 replicates of the film.
[0084] 3. Tensile strain at break % :
[0085] The water soluble film test samples were analyzed for % tensile strain at break as follows. This procedure involves determining the % tensile strain at break according to ASTM D 882 ("Standard Test Method for Tensile Properties of Thin Plastic Sheeting"). Film data was collected using an INSTRON tensile testing apparatus (Model 5544 Tensile Tester or equivalent - Instron Industrial Products, 825 University Ave., Norwood, MA 02062-2643). Five specimens are tested, each with a reliable cutting tool (eg, JDC Precision Specimen Cutter, Models 1-10, available from Thwing Albert Instrument Company, Philadelphia, PA U.S.A.) ) cut to ensure dimensional stability and reproducibility. Water soluble films were preconditioned to test ambient conditions for 24 hours. Testing was performed in a standard laboratory atmosphere of 20°C and 33% relative humidity. A 1 inch wide (2.54 cm) sample of a single film sheet with a thickness of 3.0 +/- 0.15 mils (or 76.2 +/- 3.8 [mu]m) was prepared. The samples were then transferred to the INSTRON tensile testing machine for testing. Prepare the tensile testing machine according to the manufacturer's instructions, equipped with a 500N load cell and calibrated. The jig and face were assembled correctly (INSTRON jig has a model 2702-032 face or equivalent, the face has a rubber coating and is 25mm wide). The samples were mounted in a tensile testing machine, elongated at a rate of 1 N/min, and analyzed to determine the stress-strain curve. The % tensile strain at break is extracted from the stress-strain curve, for example, the data is the % tensile strain at break of the film (higher the better, preferably >150%, more preferably >200%, most preferably >250 %). Calculate and report the average of 3 samples.
[0086] Test material:
[0087] Starting polymer material:
[0088] · PVA homopolymer: Mowiol 18/88 (ex Sigma Aldrich)
[0089] Sodium Caseinate: Sodium caseinate from milk (ex Sigma Aldrich)
[0090] Polymer Blends:
[0091] 100% sodium caseinate
[0092] 80/20 weight ratio sodium caseinate/PVA homopolymer
[0093] 60/40 weight ratio sodium caseinate/PVA homopolymer
[0094] 50/50 weight ratio sodium caseinate/PVA homopolymer
[0095] 40/80 weight ratio sodium caseinate/PVA homopolymer
[0096] 20/80 weight ratio sodium caseinate/PVA homopolymer
[0097] 100% PVA homopolymer
[0098] Water-soluble films from the corresponding polymer blends have been prepared as detailed herein:
[0099] • Dosing the polymer resin/powder in demineralized water to make a 15% solution. Add plasticizer and other additives according to the ratio. The mixture was stirred at 200 rpm in a 50 ml glass bottle. The solution was heated under reflux at 80°C in a propylene glycol bath for 4 hours.
[0100] · Fully dissolve the polymer in water to make a homogeneous solution, and drive out air bubbles by ultrasound and vacuum;
[0101] Pour the homogeneous solution onto a treated glass support (ClSi(CH) 3 ) 3 , in CHCl 3 middle) on;
[0102]Spread the solution into thin layers using a film applicator with a wet gap ranging from 250 μm to 350 μm;
[0103] · The resulting membrane was left to stand overnight at ambient conditions (22°C, 35% RH);
[0104] • Peel the dried film from the support.
[0105] Test Results :
[0106] 150%).
[0107] Table 1
[0108]
[0109] *Not measured

PUM

no PUM

Description & Claims & Application Information

We can also present the details of the Description, Claims and Application information to help users get a comprehensive understanding of the technical details of the patent, such as background art, summary of invention, brief description of drawings, description of embodiments, and other original content. On the other hand, users can also determine the specific scope of protection of the technology through the list of claims; as well as understand the changes in the life cycle of the technology with the presentation of the patent timeline. Login to view more.
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products