EP0246897A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Sealable containers
Assignee: Unilever PLC
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Filing: 1987-05-21
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Granted: —
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Expires: 2007-05-21
Abstract
Abstract A container having at least one opening seal, which seal is mechanically strong in the dry state but disintegrates in water at temperature of 40°C or below under the influence of mechanical agitation. The seal is formed from a mixture of a water-labile adhesive and a heat-sealable component.
Inventors
- 👤 Geoffrey Newbold
- 👤 Douglas Wraige
- 👤 John Duncan Wagner
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-05 10:56
CPC Classifications
B; B23; B23B; B23B45/00; C; C11; C11D; C11D17/00; C11D17/04; C11D17/041; C11D17/042; Y; Y10; Y10T; Y10T428/00; Y10T428/13; Y10T428/1334; Y10T428/1345; Y10T428/28; Y10T428/2813; Y10T428/2817; Y10T428/2826
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
86 words
A container adapted for delivering a treatment material into an environment comprising both water and mechanical agitation, the container having at least one opening seal mechanically strong in the dry state, characterised in that the seal disintegrates in water at temperatures of 40°C or below under the influence of mechanical agitation, the seal being formed from a mixture of (i) an adhesive component labile in water at temperatures of 40°C or below and (ii) a heat-sealable component insoluble in water at temperatures of 40°C or below.
Claim 2
Dependent Claim
86 words
A container adapted for delivering a treatment material into an environment comprising both water and mechanical agitation, the container having at least one opening seal mechanically strong in the dry state, characterised in that the seal disintegrates in water at temperatures of 40°C or below under the influence of mechanical agitation, the seal being formed from a mixture of (i) an adhesive component labile in water at temperatures of 40°C or below and (ii) a heat-sealable component insoluble in water at temperatures of 40°C or below.
Claim 3
Dependent Claim
14 words
A container as claimed in claim 1 wherein the seal is a heat seal.
Claim 4
Dependent Claim
27 words
A container as claimed in claim 1 or claim 2, having a plurality of compartments, each compartment being sealed with a mixture disintegrating at a different time.
Claim 5
Dependent Claim
27 words
A container as claimed in any one of claims 1 to 3, wherein the adhesive component (i) is soluble in water at temperatures of 40°C and below.
Claim 6
Dependent Claim
18 words
A container as claimed in any one of claims 1 to 4, in the form of a sachet.
Claim 7
Dependent Claim
26 words
A container as claimed in any one of claims 1 to 5, wherein the adhesive component labile in water is polyvinyl pyrrolidone, polyvinyl alcohol or dextrin.
Claim 8
Dependent Claim
27 words
A container as claimed in any one of claims 1 to 6, wherein the heat-sealable component is a vinyl acetate homopolymer, vinyl acetate/ethylene copolymer or polyacrylic acid.
Claim 9
Dependent Claim
28 words
A container as claimed in any one of claims 1 to 7, wherein the container comprises a web or sheet of woven, knitted or non-woven fabric or paper.
Claim 10
Dependent Claim
20 words
A container as claimed in any one of claims 1 to 8, wherein the container contains a fabric treatment composition.
Claim 11
Dependent Claim
95 words
A container adapted for delivering a treatment material into an environment comprising both water and mechanical agitation, the container having at least one opening seal between two non-heat-sealable walls, the opening seal being a heat seal mechanically strong in the dry state but which disintegrates in water at temperatures of 40°C or below under the influence of mechanical agitation, the heat seal being formed from a mixture of (i) an adhesive component soluble in water at temperatures of 40°C or below and (ii) a heat-sealable component insoluble in water and temperatures of 40°C or below.
Claim 12
Dependent Claim
95 words
A container adapted for delivering a treatment material into an environment comprising both water and mechanical agitation, the container having at least one opening seal between two non-heat-sealable walls, the opening seal being a heat seal mechanically strong in the dry state but which disintegrates in water at temperatures of 40°C or below under the influence of mechanical agitation, the heat seal being formed from a mixture of (i) an adhesive component soluble in water at temperatures of 40°C or below and (ii) a heat-sealable component insoluble in water and temperatures of 40°C or below.
Claim 13
Independent Claim
57 words
A method of heat-sealing together two surfaces of non-heat-sealable materials comprising the steps of a) coating at least one surface with a mixture of i) an adhesive component soluble in water at temperature of 40°C or below, and ii) a heat-sealable component insoluble in water at temperatures of 40°C or below, and b) heat-sealing the surfaces together.
Claim 14
Independent Claim
57 words
A method of heat-sealing together two surfaces of non-heat-sealable materials comprising the steps of a) coating at least one surface with a mixture of i) an adhesive component soluble in water at temperature of 40°C or below, and ii) a heat-sealable component insoluble in water at temperatures of 40°C or below, and b) heat-sealing the surfaces together.
References Cited (Backward Citations)
No citation records indexed.
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