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Disposable, moisture vapour permeable, liquid impermeable covering sheet having odour reduction properties

a technology of odour reduction, which is applied in the field of disposable, moisture vapour permeable, liquid impermeable covering sheet having odour reduction properties, and can solve problems such as adversely contributing to other pathologies

Inactive Publication Date: 2003-09-18
THE PROCTER & GAMBLE COMPANY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It has long been established that house mites, also known as dust mites, are a source of house dust allergens that not only cause allergies, but also adversely contribute to other pathologies, such as asthma.

Method used

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  • Disposable, moisture vapour permeable, liquid impermeable covering sheet having odour reduction properties
  • Disposable, moisture vapour permeable, liquid impermeable covering sheet having odour reduction properties

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0090] A polyether-amide block copolymer available from Atofina (France) commercialised under the trade name Pebax 2533 SN is compounded with Tri Butyl Citrate (plasticiser) available from Aldrich Co., Res A-2691 (tackifier resin) available from Hercules Inc., Res A-2690 (tackifier resin) available from Hercules Inc., both resins described in our already mentioned European application No. 00116284.1, and Irganox 1010 (anti oxidant agent) available from Ciba-Geigy.

[0091] The final formulation in percent by weight has the following composition:

2 44% Pebax 2533 SN 25% Tri Butyl Citrate 15% Res A-2691 15% Res A-2690 1% Irganox 1010

[0092] The blend is melt extruded to obtain a film having a basis weight of 20 g / m.sup.2. The film is laminated directly onto a substrate constituted by a SMS (Spunbonded-Meltblown-Spunbonded structure) hydrophobic 100% polypropylene nonwoven 25 g / m.sup.2 (support layer) commercialised under the trade name MD3000, available form Corovin--BBA Nonwovens Group (G...

example 2

[0103] As example 1 except that this time zeolite ZP-4A available from Silkem d.o.o. (Slovenija) was added into the thermoplastic blend composition in proportion of 1% by weight of composition as odour control material.

[0104] When evaluated for malodour reduction in the same manner as in the example 1 the sample of mattress cover comprising the composition containing 1% of zeolite gave a malodour reduction of 29% compared to the sample of mattress cover of the same composition but not containing zeolite.

[0105] Further increase of the amount of zeolite gave no significant further advantage. In fact at a zeolite level of 2% the malodour reduction was 30%.

[0106] A decrease of zeolite level at 0.5% gave no advantage. In fact at a zeolite level of 0.5% the malodour reduction was 5% only.

example 3

[0107] A polyether-amide block copolymer available from Atofina (France) commercialised under the trade name Pebax 2533 SN01 is compounded with Citroflex 2 (plasticiser) available from Reilly Chemical Co., Ketjenflex 8 (plasticizer) available from Akzo Nobel Co., Irganox 1010 and Irganox PS 800 (both anti oxidant agents) available from Ciba-Geigy, and ZP-4 A (zeolite-as odour control material) available from Silkem d.o.o. (Slovenija).

[0108] The final formulation in percent by weight has the following composition:

6 50.00% Pebax 2533 SN 24.35% Citroflex 2 24.35% Ketjenflex 8 0.15% Irganox 1010 0.15% Irganox PS 800 1.00% ZP-4 A

[0109] The blend is melt extruded to obtain a film having a basis weight of 20 g / m.sup.2. The film is laminated directly onto a substrate constituted by a SMS (Spunbonded-Meltblown-Spunbonded structure) hydrophobic 100% polypropylene nonwoven 17 g / m.sup.2 (support layer) commercialised under the trade name G17AI0, available form Corovin--BBA Nonwovens Group (Germ...

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Abstract

The present invention relates to a disposable covering sheet which is moisture vapour permeable and liquid impermeable and has odour control properties and, if desired, also active agent releasing properties. The disposable covering sheet comprises at least a moisture vapour permeable layer and a liquid impermeable but moisture vapour permeable film layer of thermoplastic compositions. The disposable covering sheet such as, for example, a mattress cover or a pillow cover gives a better comfort to the user by providing odour control properties and, if desired, also active agent releasing properties. The disposable covering sheet of the present invention can find a variety of applications wherein moisture vapour permeability and liquid imperviousness combined with specific odour control properties and preferably also active agent releasing properties are desirable.

Description

CROSS REFERENCE TO PRIOR APPLICATION[0001] This is a continuation of International Application PCT / US01 / 42388, with an international filing date of Oct. 1, 2001, and published in English.FIELD OF THE INVENTION[0002] The present invention relates to a disposable covering sheet preferably for bedding items such as mattresses, pillows, etc. which is moisture vapour permeable, liquid impermeable, and has odour reduction properties. The covering sheet comprises liquid impermeable formed structures having a moisture vapour permeability comprising thermoplastic compositions preferably applied onto a moisture vapour permeable substrate. The covering sheet of the present invention can find a variety of applications wherein moisture vapour permeability, liquid imperviousness, disposability, comfort, specific odour control properties and, if desired, also active agents releasing properties are desirable. Preferably the covering sheet of the instant invention is a mattress cover or a pillow cov...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): A47G9/00
CPCA47G9/007
Inventor BONFANTI, LIDIAPESCE, ANTONELLAPORTER, PHILIPRUSSO, ELISABETTASIRIANNI, GIUSEPPETRUJILLO, RAFAEL
Owner THE PROCTER & GAMBLE COMPANY