WO1999051809A1 - Materiaux composites absorbants de liquide aqueux - Google Patents
Materiaux composites absorbants de liquide aqueux Download PDFInfo
- Publication number
- WO1999051809A1 WO1999051809A1 PCT/FR1999/000675 FR9900675W WO9951809A1 WO 1999051809 A1 WO1999051809 A1 WO 1999051809A1 FR 9900675 W FR9900675 W FR 9900675W WO 9951809 A1 WO9951809 A1 WO 9951809A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- composite
- nonwoven
- composite according
- absorbent
- powder
- Prior art date
Links
Classifications
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L15/00—Chemical aspects of, or use of materials for, bandages, dressings or absorbent pads
- A61L15/16—Bandages, dressings or absorbent pads for physiological fluids such as urine or blood, e.g. sanitary towels, tampons
- A61L15/42—Use of materials characterised by their function or physical properties
- A61L15/60—Liquid-swellable gel-forming materials, e.g. super-absorbents
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
- D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
- D06N3/0086—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique
- D06N3/0088—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by directly applying the resin
- D06N3/0093—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the application technique by directly applying the resin by applying resin powders; by sintering
Definitions
- the present invention relates to the industry of multilayer composites capable of absorbing an aqueous liquid and of swelling, and in particular to two-layer composites and to articles containing them such as cables for the transport of energy and articles of hygiene.
- the composites to which the invention relates can be used in different industries.
- the electric cables industry for telephony and optical fibers
- the baby hygiene industry for adult incontinence and feminine hygiene.
- the cables have at least three distinct parts which are, going from the core to the outside:
- Absorbent composites are known and widely used in the cable industry. For this application they are introduced into the cable to ensure its tightness during the accidental entry of water. Indeed, when water enters the cable following the deterioration of the outer layer, the composite absorbs this liquid and by swelling prevents the propagation of water.
- the composites used in cables are generally based on absorbent powder, caught between two layers of nonwoven material.
- Such a composite known as a three-layer absorbent composite, is known and widely described.
- EP 0188959 describes electrical cables containing composite materials based on hydroexpansible powder such as modified acrylic polymers, grafted starches, polyacrylamides, carboxymethyl cellulose, enclosed between two layers of nonwoven material. Said powder is fixed to the nonwoven by a water-soluble binder.
- the water-soluble support On contact with water, the water-soluble support partially dissolves, giving a certain freedom to the powder which will expand rapidly by forming a bead and thus preventing the propagation of the water.
- the freedom of the powder remains partial and its effectiveness limited.
- the Applicant has also discovered that the freedom of expansion of the absorbent powder can be further improved by controlling its distribution and the quantity fixed on the nonwoven. Indeed, the Applicant has found that when the absorbent powder is distributed punctually on the nonwoven and preferably in the form of a monolayer, its freedom of expansion and its effectiveness are increased. Because under these conditions the particles of the absorbent powder are no longer trapped and form between them channels thus facilitating the circulation of the liquid and its absorption by the powder.
- the first object of the invention is an absorbent composite capable of swelling, characterized in that said composite consists of two layers: a flexible support based on non-woven material and at least one absorbent powder fixed to said support by hot melt glue.
- the mass of the adhesive is 2 to 100 g per m 2 of nonwoven and the mass of the absorbent powder is 5 to 300 g per m 2 .
- nonwoven materials used in the cable industry are generally thermally or chemically bonded nonwoven polyesters and polyolefins such as polypropylene. These materials can optionally be loaded so as to become semiconductors.
- the preferred nonwovens for carrying out the invention are polyesters, characterized by a smooth surface and a weight of 10 to 100 g / m 2 , or else filled polyesters having a weight of 50 to 300 g / m 2 .
- hot-melt adhesive means a mixture consisting of a polymer, a resin, an oil or wax and various additives.
- the adhesives according to the invention are those described by WO 97/12007.
- the adhesives used for the implementation of the invention are in particular self-adhesive hotmelt adhesives or not having a melting point close to 150 ° C. and a melt index of between 0.5 and 1000. They are generally made up of polymers. Among these, polymers based on ethylene and alkyl acrylate occupy a privileged position. In general, the alkyl acrylate is chosen from methyl acrylate, butyl acrylate and 2, ethylhexylacrylate.
- hot-melt adhesive it is also possible, as hot-melt adhesive, to use ethylene-vinyl acetate copolymers or styrene-butadiene-styrene copolymers, or even reactive adhesives such as polyurethanes.
- the ethylene / vinyl acetate copolymer is used, characterized by an acetate level of 10 to 45% by weight.
- the glue is deposited on the nonwoven using an engraved roller as described below. It partially or completely covers the surface of the nonwoven.
- the surface covered by the adhesive is from 10% to 80% of the total surface of the nonwoven and represents from 2 to 100 g per m 2 of nonwoven .
- the absorbent powder according to the invention is a natural or industrial powder. It is homogeneous and of fine particle size.
- It is generally chosen from the group consisting of modified acrylic polymers, grafted starches, polyacrylamides, cellulose derivatives such as carboxymethyl cellulose.
- the preferred absorbent powder according to the invention is a powder based on partially neutralized and crosslinked polyacrylic acid hereinafter designated by SAP. It is characterized by a particle size of less than 800 ⁇ m and an absorption rate of an aqueous solution containing 0.9% NaCl, which can reach 100 g per g of SAP.
- This powder can be obtained by various methods such as those described by FR 2 710 342 and FR 2 732 973.
- the absorbent powder must cover at least the entire surface of the adhesive.
- the amount of powder attached to the nonwoven is 5 to 300 g per m 2 of nonwoven.
- the composites of the invention as described above can be used in all applications using an absorbent powder. Mention may be made, for information, of cables for transporting energy, diapers for babies, sanitary napkins for adult incontinence and for feminine hygiene.
- the absorbent powder is trapped between two layers of nonwoven material. 4
- the nonwoven layer is placed between two rolls, one of them has a smooth surface, the other has an engraved surface.
- the movement of the nonwoven is ensured by the rotation of the rollers.
- the hot-melt adhesive is melted in a tank placed in direct contact with the engraved roller. As a result, the molten glue touches the surface of the roller. This one turns the melted glue and deposits it on the nonwoven.
- the absorbent powder is then sprinkled on the nonwoven coated with glue.
- the patterns engraved on the roller control the amount of glue deposited on the nonwoven as well as the surface covered and therefore the amount of absorbent powder fixed.
- an infrared (IR) cell can be installed on the test bench before the removal of SAP.
- the key parameter is the temperature released by the IR cell at the composite level. The optimum temperature is around 30 ° C above the softening point of the adhesive.
- a calendering step has been added to the test bench, which has the effect of significantly reducing the dusting of hot-melt composites.
- Calendering consists of passing the composite between two heated stainless steel rollers while exerting pressure on it: the heat of the rollers makes it possible to reactivate the glue and the pressure exerted simultaneously makes it possible to penetrate the particles of SAP into the glue points.
- the SAP is thus better attached to the nonwoven and the natural powdering of the composite is eliminated.
- the glue must be softened but not too much so as not to cause it to diffuse through the nonwoven under the effect of the pressure exerted by the rollers.
- An optimal temperature of the order of 50 ° C. was used in the context of the tests carried out. 5
- the amount of adhesive is determined by weighing during the manufacture of the composite.
- the amount of SAP is determined by weighing during the manufacture of the composite.
- SAPs copolymer of acrylic acid and crosslinked sodium acrylate
- the determination by a specific electrode of the amount of sodium in the composite after extraction and the knowledge of the sodium content of the powder make it possible to determine the amount of SAP present in the composite.
- the displacement of the cover (due to the swelling of the SAP) gives a swelling height in mm.
- PE II 40 g per m 2 hereinafter designated by PE I, ie a carbon black polyester loaded with a weight of 65 g / m 2 hereinafter designated by PE II
- the calendering therefore clearly improves the behavior of the SAP on the nonwoven and there is practically negligible dusting in the case where the composite is subjected to an air jet of 3 bars.
Landscapes
- Health & Medical Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Hematology (AREA)
- Materials Engineering (AREA)
- Epidemiology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Dispersion Chemistry (AREA)
- General Health & Medical Sciences (AREA)
- Public Health (AREA)
- Veterinary Medicine (AREA)
- Textile Engineering (AREA)
- Absorbent Articles And Supports Therefor (AREA)
- Laminated Bodies (AREA)
- Insulated Conductors (AREA)
Abstract
Description
Claims
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CA002324933A CA2324933A1 (fr) | 1998-04-03 | 1999-03-23 | Materiaux composites absorbants de liquide aqueux |
AU29385/99A AU2938599A (en) | 1998-04-03 | 1999-03-23 | Composite absorbent materials for aqueous liquid |
JP2000542518A JP2002510572A (ja) | 1998-04-03 | 1999-03-23 | 水溶液を吸収する複合材料 |
EP99910419A EP1078123A1 (fr) | 1998-04-03 | 1999-03-23 | Materiaux composites absorbants de liquide aqueux |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9804184A FR2776955B1 (fr) | 1998-04-03 | 1998-04-03 | Materiaux composites absorbants de liquide aqueux |
FR98/04184 | 1998-04-03 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1999051809A1 true WO1999051809A1 (fr) | 1999-10-14 |
Family
ID=9524842
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/FR1999/000675 WO1999051809A1 (fr) | 1998-04-03 | 1999-03-23 | Materiaux composites absorbants de liquide aqueux |
Country Status (7)
Country | Link |
---|---|
EP (1) | EP1078123A1 (fr) |
JP (1) | JP2002510572A (fr) |
CN (1) | CN1301322A (fr) |
AU (1) | AU2938599A (fr) |
CA (1) | CA2324933A1 (fr) |
FR (1) | FR2776955B1 (fr) |
WO (1) | WO1999051809A1 (fr) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1514678A1 (fr) * | 2003-09-10 | 2005-03-16 | Innovatec Microfibre Technology GmbH & Co.KG | Structure non tissée multilcouche |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE20120392U1 (de) * | 2001-12-17 | 2002-03-14 | Klein, Hans Georg, 35764 Sinn | Flexible Bahnen, insbesondere für die Herstellung von Schutzbekleidung |
WO2004016425A2 (fr) * | 2002-08-15 | 2004-02-26 | Paul Vogt | Natte et bande d'etancheite comportant une couche superabsorbante, procede de fabrication et utilisation associes |
DE10339178A1 (de) * | 2003-08-21 | 2005-03-17 | Deutsche Gelatine-Fabriken Stoess Ag | Wasserspeichermaterial |
BE1023792B1 (nl) * | 2015-10-07 | 2017-07-27 | Syral Belgium Nv | Een hechtmiddelsamenstelling omvattende een zetmeelhydrolysaat voor het thermisch hechten |
Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5845053A (ja) * | 1981-09-10 | 1983-03-16 | ダイニツク株式会社 | 高吸水性機能を有する長尺積層シート状物の製造方法 |
JPS6128003A (ja) * | 1984-07-13 | 1986-02-07 | ユニ・チヤ−ム株式会社 | 衛生物品における吸収体およびその製造方法 |
EP0188959A1 (fr) * | 1984-12-21 | 1986-07-30 | Intissel | Matériau composite hydroexpansible, sa préparation et composition pour la mise en oeuvre de celle-ci, ainsi que ses utilisations |
EP0378940A1 (fr) * | 1988-12-20 | 1990-07-25 | Intissel | Matériau composite apte à gonfler en présence d'eau, supports utilisables pour sa fabrication et ses utilisations |
EP0612533A1 (fr) * | 1993-02-24 | 1994-08-31 | SANYO CHEMICAL INDUSTRIES, Ltd. | Composition et matériau absorbant l'eau |
US5395359A (en) * | 1991-01-25 | 1995-03-07 | Kao Corporation | Absorbent article |
FR2711011A3 (fr) * | 1994-11-09 | 1995-04-14 | Alcatel Cable | Câble de télécommunications étanche, et dispositif de fabrication d'un tel câble. |
JPH07157956A (ja) * | 1993-12-02 | 1995-06-20 | Kuraray Co Ltd | 遮水材料の製造方法 |
WO1996009023A1 (fr) * | 1994-09-24 | 1996-03-28 | Basf Aktiengesellschaft | Enduits adhesifs contenant des particules superabsorbantes |
-
1998
- 1998-04-03 FR FR9804184A patent/FR2776955B1/fr not_active Expired - Fee Related
-
1999
- 1999-03-23 AU AU29385/99A patent/AU2938599A/en not_active Abandoned
- 1999-03-23 CA CA002324933A patent/CA2324933A1/fr not_active Abandoned
- 1999-03-23 JP JP2000542518A patent/JP2002510572A/ja not_active Withdrawn
- 1999-03-23 WO PCT/FR1999/000675 patent/WO1999051809A1/fr not_active Application Discontinuation
- 1999-03-23 EP EP99910419A patent/EP1078123A1/fr not_active Ceased
- 1999-03-23 CN CN 99806194 patent/CN1301322A/zh active Pending
Patent Citations (9)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5845053A (ja) * | 1981-09-10 | 1983-03-16 | ダイニツク株式会社 | 高吸水性機能を有する長尺積層シート状物の製造方法 |
JPS6128003A (ja) * | 1984-07-13 | 1986-02-07 | ユニ・チヤ−ム株式会社 | 衛生物品における吸収体およびその製造方法 |
EP0188959A1 (fr) * | 1984-12-21 | 1986-07-30 | Intissel | Matériau composite hydroexpansible, sa préparation et composition pour la mise en oeuvre de celle-ci, ainsi que ses utilisations |
EP0378940A1 (fr) * | 1988-12-20 | 1990-07-25 | Intissel | Matériau composite apte à gonfler en présence d'eau, supports utilisables pour sa fabrication et ses utilisations |
US5395359A (en) * | 1991-01-25 | 1995-03-07 | Kao Corporation | Absorbent article |
EP0612533A1 (fr) * | 1993-02-24 | 1994-08-31 | SANYO CHEMICAL INDUSTRIES, Ltd. | Composition et matériau absorbant l'eau |
JPH07157956A (ja) * | 1993-12-02 | 1995-06-20 | Kuraray Co Ltd | 遮水材料の製造方法 |
WO1996009023A1 (fr) * | 1994-09-24 | 1996-03-28 | Basf Aktiengesellschaft | Enduits adhesifs contenant des particules superabsorbantes |
FR2711011A3 (fr) * | 1994-11-09 | 1995-04-14 | Alcatel Cable | Câble de télécommunications étanche, et dispositif de fabrication d'un tel câble. |
Non-Patent Citations (3)
Title |
---|
DATABASE WPI Section Ch Week 8317, Derwent World Patents Index; Class A96, AN 83-39989K, XP002087248 * |
DATABASE WPI Section Ch Week 8612, Derwent World Patents Index; Class A96, AN 86-078828, XP002087247 * |
DATABASE WPI Section Ch Week 9533, Derwent World Patents Index; Class A18, AN 95-252684, XP002087246 * |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1514678A1 (fr) * | 2003-09-10 | 2005-03-16 | Innovatec Microfibre Technology GmbH & Co.KG | Structure non tissée multilcouche |
Also Published As
Publication number | Publication date |
---|---|
FR2776955A1 (fr) | 1999-10-08 |
CN1301322A (zh) | 2001-06-27 |
EP1078123A1 (fr) | 2001-02-28 |
FR2776955B1 (fr) | 2000-05-05 |
CA2324933A1 (fr) | 1999-10-14 |
AU2938599A (en) | 1999-10-25 |
JP2002510572A (ja) | 2002-04-09 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
BE1000856A6 (fr) | Structures absorbant l'eau et procede pour leur preparation. | |
FR2751208A1 (fr) | Article composite absorbant ayant une sous-couche d'acquisition de fluide | |
EP0467743B1 (fr) | Procédé de compactage d'un mélange pulvérulent permettant d'obtenir un produit compact absorbant ou partiellement délitable et produit obtenu par ce procédé | |
EP0862997B1 (fr) | Procédé continu de revêtement d'une bande et bandes ainsi obtenues | |
EP0262230A1 (fr) | Composite absorbant l'eau et procede de preparation | |
RU2001114251A (ru) | Пластина с высокой водопоглощающей способностью и способ ее изготовления | |
FR2704563A1 (fr) | Composite absorbant ayant un fort effet de mèche vis-à-vis des liquides et son procédé de fabrication. | |
FR2613217A1 (fr) | Tubes en papier a desagregation rapide | |
EP0214168A1 (fr) | Structure absorbante pour article a usage unique. | |
FR2997842A1 (fr) | Articles absorbants avec canaux et signaux | |
EP0353014A2 (fr) | Article d'essuyage | |
EP0792591A1 (fr) | Entoilage thermocollant et son procédé de fabrication | |
EP0378940B1 (fr) | Matériau composite apte à gonfler en présence d'eau, supports utilisables pour sa fabrication et ses utilisations | |
WO1999051809A1 (fr) | Materiaux composites absorbants de liquide aqueux | |
WO2008099090A2 (fr) | Procédé de fonctionnalisation d'un substrat textile par pontage sous rayonnement ionisant | |
FR2712801A1 (fr) | Structure absorbante et vêtement l'incorporant. | |
FR2746264A1 (fr) | Procede de fabrication d'un entoilage thermocollant et entoilage thermocollant ainsi obtenu | |
US20060037691A1 (en) | Method and apparatus for making an adhesive cleaning sheet | |
FR2911153A1 (fr) | Substrat textile incorporant une composition de regulation thermique entourant des ilots de transfert. | |
JP3292844B2 (ja) | 高吸水性複合体シート及びその表面加工方法 | |
FR2485815A1 (fr) | Materiau pour separateurs de batteries, procede pour sa fabrication et separateur de batterie fabrique avec ce materiau | |
EP1354926A2 (fr) | Complexe perméable au gaz et imperméable au moins pour partie, aux liquides aqueux | |
FR2653059A1 (fr) | Article pour traitement de surface contenant un materiau de traitement loge in situ et liberable au moment de l'utilisation. | |
GB2203985A (en) | Absorbent films | |
EP1252386B1 (fr) | Membrane d'etancheite et procede de fabrication d'une membrane d'etancheite |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 99806194.8 Country of ref document: CN |
|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): AL AM AT AU AZ BA BB BG BR BY CA CH CN CU CZ DE DK EE ES FI GB GD GE GH GM HR HU ID IL IN IS JP KE KG KP KR KZ LC LK LR LS LT LU LV MD MG MK MN MW MX NO NZ PL PT RO RU SD SE SG SI SK SL TJ TM TR TT UA UG US UZ VN YU ZW |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): GH GM KE LS MW SD SL SZ UG ZW AM AZ BY KG KZ MD RU TJ TM AT BE CH CY DE DK ES FI FR GB GR IE IT LU MC NL PT SE BF BJ CF CG CI CM GA GN GW ML MR NE SN TD TG |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application | ||
DFPE | Request for preliminary examination filed prior to expiration of 19th month from priority date (pct application filed before 20040101) | ||
WWE | Wipo information: entry into national phase |
Ref document number: 1999910419 Country of ref document: EP |
|
ENP | Entry into the national phase |
Ref document number: 2324933 Country of ref document: CA Ref document number: 2324933 Country of ref document: CA Kind code of ref document: A |
|
NENP | Non-entry into the national phase |
Ref country code: KR |
|
WWE | Wipo information: entry into national phase |
Ref document number: 09647598 Country of ref document: US |
|
REG | Reference to national code |
Ref country code: DE Ref legal event code: 8642 |
|
WWP | Wipo information: published in national office |
Ref document number: 1999910419 Country of ref document: EP |
|
WWR | Wipo information: refused in national office |
Ref document number: 1999910419 Country of ref document: EP |
|
WWW | Wipo information: withdrawn in national office |
Ref document number: 1999910419 Country of ref document: EP |