CN1224372A - Absorbent footwear material - Google Patents
Absorbent footwear material Download PDFInfo
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- CN1224372A CN1224372A CN 97196062 CN97196062A CN1224372A CN 1224372 A CN1224372 A CN 1224372A CN 97196062 CN97196062 CN 97196062 CN 97196062 A CN97196062 A CN 97196062A CN 1224372 A CN1224372 A CN 1224372A
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- polyurethane foam
- super absorbent
- foam
- polymer
- polyalcohol
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- Manufacture Of Porous Articles, And Recovery And Treatment Of Waste Products (AREA)
- Laminated Bodies (AREA)
Abstract
An open cell polyurethane, non-swelling foam impregnated or coated into a non-woven fabric, comprising super absorbent ingredient particles. The disclosed material is a super absorbent, fluid locking, moldable footwear product that takes body fluids away from the surface, and gels or locks the fluids in place even while under pressure. The material is breathable and releases fluids through evaporation.
Description
The present invention relates to a kind of polyurethane foam that is immersed in the non-woven with lock fluidity, mouldable, non-swelling.The composite that it relates in particular to a kind of durable, imbibition, non-swelling, compressible molding can pin liquid during this material pressurized.
Sucting wet problem in footwear, boots and the other footwear goods is exactly the difficult problem of shoe-making field for a long time.The moisture that pin is discharged if can not be sopped up, can cause discomfort, temperature change, get blister and fungi grows.
Solving moisture issues generally is to introduce Moisture-absorptive lining pad in footwear.This liner is often by fabric and non-woven material or the two is in conjunction with making.
The end, be well-known in the art in the foam shoes goods, generally comprises: contain laminate, foam or other course and the rigid body foam and laying below of gasket material as top layer.Foam is generally polyurethane or polyethylene.End foam is flexible and makes the interior end have shockproof component in the present article of footwear, and prior art fails to provide the interior end that siphons away moisture and subsequently moisture is pinned from pin.
The foam that makes with hydrophilic polymer is a possible solution of the problems referred to above as the end in the bed course of article of footwear and the absorbability.Yet the end, have significant disadvantage in the article of footwear that the foam that is made by hydrophilic polymer is formed.Swelling can take place in nearly all polymeric foam composition that is made by hydrophilic polymer under the situation of imbibition.In these foams, promptly use those of hydrophilic polymer, absorption takes place in polymer, therefore swelling takes place.Swelling makes product thickness be out of shape, and this has just become problem in the finite volume in footwear chamber.In addition, the change of foam size produces stress in the time of can causing the other parts of foam and footwear material to link, and increases wearing and tearing.It is very favourable that a kind of material that only just absorbs liquid when exerting pressure is arranged, and it has limited footwear and absorb moisture from for example moist environment when not passing.Like this, just need a kind of composite foam material that can preserve liquid, compressible molding, it is swelling and only just absorb moisture when exerting pressure not, can be used as the end in the article of footwear and/or as the liner of footwear or boots.
Before the present invention, there is not known polyurethane material can be when material is exerted pressure when contacting to siphon away moisture and with its pinning from the surface with moisture.Another wondrous and do not expect result that non-swelling absorbability of the present invention is a new compositions of the present invention, the result that it provided is better than the absorbent material of prior art.
New polyurethane foam compositions of the present invention is also wondrous and do not suspect.Methylenediphenyl diisocyanates is a kind of non-hydrophilicity prepolymer, in the time of in being impregnated in foam, being expected to stop moisture and entering any super absorbent polymer that mixed, and so just is expected to produce a kind of foam of not locking the liquid ability.Before the present invention, importing super absorbent polymer based on the absorbent foam of methylenediphenyl diisocyanates be known to the present technique field, and therefore, its particular performances is not just recognized by this area yet.
One of purpose of the present invention is to provide a kind of hydrophilic polyurethane foam based on non-hydrophilicity prepolymer methylenediphenyl diisocyanates, and this foam comprises a super absorbent polymer and can absorb liquid under exerting pressure.
Another object of the present invention is to provide a kind of footwear product of absorbability bed course, contain a non-hydrophilic polyurethane foam, when the interior end that is used as footwear or liner, the moisture that can absorb the pin generation is also driven away moisture from the wearer foot of these footwear thus.
Another object of the present invention is to provide a kind of absorbefacient, respirable bed course footwear product that has, it only just absorbs moisture when pressure being imposed on this absorbability footwear product surperficial, and connects by evaporation (promptly no matter whether exerting pressure) and constantly to discharge the moisture that absorbs.
The present invention relates to a kind of durable, can breathing, imbibition, lock liquid, mouldable composite, comprise a matrix and a kind of interior or coating polyurethane foam thereon of matrix that is immersed in, this polyurethane foam is made by polymer and one or more surfactants of polyalcohol, non-hydrophilicity prepolymer, super-absorbert.
This composite also can contain a kind of acrylic polymer to give this material mouldable and compressible characteristic.
Here all patents and the publication quoted are incorporated herein by reference.Term has under the situation of conflict, is as the criterion with disclosed by the invention.
Composite of the present invention contains a kind of immersion fabric of perforate or the non-woven matrix is interior or coating polyurethane foam thereon.This polyurethane foam is the product that methylenediphenyl diisocyanates prepolymer and a kind of polyalcohol, surfactant reach optional acrylic polymer.Acrylic polymer (if adding) will add q.s to give foam mouldable characteristic.This composite also contain or mechanical attachment on non-woven or be incorporated into one or more super absorbent polymers in the polyurethane foam.In a preferred embodiment, the polymer of super-absorbert is incorporated in the polyurethane foam.Composite also can be chosen wantonly and contain needle prick shape fiber finishing agent, and it is used for making liquid to decompose foam inside and makes composite have surface texture.
The polyurethane foam that contains super absorbent polymer of the present invention, it is prepared as follows: 1 part of methylenediphenyl diisocyanates prepolymer and 2 to 6 parts of polyalcohol components is admixed together.Polyol component comprises: polyether polyol, surfactant, for example 1,2-expoxy propane/epoxyethane block copolymer such as the Pluronic L-62 (polyol component of about 2-15% weight, 10% weight preferably approximately), 1, the aqueous solution of 2-expoxy propane/epoxyethane block copolymer 10% such as the Pluronic F-88 (polyol component of about 0.25-3% weight, 2% weight preferably approximately), one or more super absorbent polymers (polyol component of 0.25-2% weight, 2% weight preferably approximately) and optional a kind of acrylic polymer (polyol component of 0.25-10% weight, preferably approximately 3% weight).Acrylic polymer (if adding) can make product have mouldability.
Prepolymer and polyol component are with appropriate amount combination and fully mixing.Mixed method is preferably used the foaming machine of type that this area is familiar with, and the mixing head rotating speed is 2500-4000 rev/min (rpm).Mixture is entered matrix, be preferably combing air lay non-woven material, matrix has been positioned on the smooth isolated material, such as the barrier paper of siloxanes coating (as 92#Stay Flat L-3 liner, Technicote/siltech, Inc., Miamisburg, OH).Above foam is clipped in by the smooth isolated material of another piece.The material that the non-woven matrix can be such as 2.5 ounces/square feet BetterBlend (Carlee Corporation, Rockleigh, NJ).The paper that carries matrix is advanced so that the amount of the isocyanates/polyol blends that deposits is enough to produce the product of desired thickness with certain velocity level.
Make polymer and polyol reaction, produce carbon dioxide and polyurethane, form the foam that immerses non-woven.The gas of separating out is enclosed in the reactant mixture and is formed abscess.Because more carbon dioxides produce, abscess becomes big and the proportional expansion of reactive material, thereby causes foam to increase.At certain a bit, measured response thing (prepolymer of isocyanate-functional) is depleted, and gas produces and stops, and generally is in 4-6 minute.After about 6 minutes, the barrier paper of top and bottom is removed continuously, exposes composite.Then composite being moved into a temperature remains in 220-275 the forced air convection stove to finish the curing of material.Make such as the generation of chain elongation and crosslinked side reaction and to produce " curing " three-dimensional netted non-hydrophilic polymer foam.During curing, the product general thickness for but not and be confined to 1/8 inch to 1/2 inch.After the curing, material is slit into required shape and carries out molding with die cuts.The material of gained generally can absorb about 5-20 water doubly of its weight.
The chemical reaction that takes place in the polyurethane foam manufacture process with and continuous and discontinuous manufacture method be disclosed in " polyurethane handbook; second edition " in more detail, G ü nter Oertel writes Hanser Publishers, Munich (pp.11-244) 1993 draws at this and to be reference.
Preferred isocyanate prepolymer is the Flexible Produces isocyanates FP 100-A polyurethane prepolymer of being derived by methylenediphenyl diisocyanates.The preferred polyol that is used for polyol component is FP 100-B.Also preferred FP 365-6 (Flexible Products, Marietta, GA).Preferred surfactants be Pluronic L-62 and Pluronic F-88 (BASF Corp.Charlotte, NC).Being used for preferred acrylic polymer of the present invention is Rhoplex TR407 emulsion (Rohm ﹠amp; Haas Co.Philadelphia, PA).Preferred super absorbent polymer is characterised in that: it can absorb the aqueous solution of about 1000-5000% weight and maintain this liquid and do not dewater under the pressure up to about 80psi.This super absorbent polymer comprises the sodium salt of crosslinked polyacrylate polymers, starch-grafted polyacrylate polymers, crosslinked polypropylene ester potassium/polyacrylamide, crosslinked polyacrylic acid polyalcohols graft copolymer, crosslinked polyacrylic part sodium salt, crosslinked PVP, crosslinked sulfonated polystyrene, crosslinked poly-(methyl) sulfoethyl acrylate, crosslinked polyacrylic acid 2-ethylhexyl and crosslinked hydrogenation polyacrylonitrile.In the material of the present invention used preferred super absorbent polymer be the AP80HS super absorbent polymer (Stockhausen, Inc.Greensboro, NC).
In one embodiment, super absorbent polymer mixes in the material of the present invention by mechanical adhesion, and polymer uses pressure-sensitive cement or contact adhesive to adhere on the non-woven usually.Adhesive can be a water quality, solvent matter, or hot melt.Adhesive consumption will depend on the amount of the super absorbent polymer that will be adhered to, and can easily be determined by those of ordinary skills.The non-limitative example of such adhesive be Super 77 spray adhesives (3M Corporation, St.Paul, MN).Used foam does not contain super absorbent polymer in this embodiment.This foam can be by the method preparation identical with the foam that contains super-absorbent polymer, and difference is that water replaces the super absorbent polymer in the polyol component.
Composite of the present invention can further use needle-punching method to carry out modification, and this method is that the sorted material fiber is imbedded or squeezed in the foamed material.This needle point method can strengthen the performance of product and give product with the ornamenting surface, and this is useful to attractive in appearance and function reason.When existing, the fibre finish material helps and will treat that absorption fluids delivers in lower floor's foams.Finishing fiber or hydrophilic or hydrophobic, and be used for guiding or fluid is sucked foams, soft dried surface obtained.The non-limitative example that can be used for the fiber in the present invention's arrangement is acrylic compounds, polypropylene or polyester fiber or their blend.
Embodiment
Polyurethane foam is prepared by following method: 1 part of isocyanates FP 100-A prepolymer and 4 parts of polyol components are mixed.Polyol component comprises polyalcohol FP100-B, Pluronic L-62 (10 weight %), the aqueous solution of Pluronic F-88 (2 weight %) 10%, Rhoplex TR407 (3 weight %) and super absorbent polymer AP 80HS (2 weight %).Two kinds of components are mixed in mixing head with about 4000 rev/mins.Mixture enters in the combing air lay non-woven, and there is the barrier paper of silicone coating at the top and is clamped at the top by the barrier paper of another layer silicone coating.Paper is advanced with 4 feet velocity levels of per minute, obtains thick 1/4 inch product.
In the 4-6 that follows minute, polymer and polyol reaction form the non-woven that foam immerses.After 6 minutes, top and bottom barrier paper are removed from end face continuously, expose material.Product delivered in the forced air convection stove that remains on 220 with moving belt finally solidify.The gained material is an open celled foam, is soaked with non-woven, white, and 1/4 inch is thick, wettable when contacting with moisture when the surface exerted pressure.
Claims (9)
- One kind durable, can breathing, imbibition, lock liquid, mouldable composite, comprising:A kind of matrix;A kind ofly immerse this matrix or be coated with thereon polyurethane foam, wherein said polyurethane foam comprises a polyalcohol, a non-hydrophilicity prepolymer, a super absorbent polymer and one or more surfactants.
- 2. the material of claim 1, wherein polyurethane foam is formed with ratio 1: 1-reaction in about 6: 1 by non-hydrophilic isocyanate polymer and polyalcohol.
- 3. the material of claim 3, wherein polyurethane foam comprises that Flexible Products FP100-A isocyanates and is selected from the material of Flexible Products FP 100-B polyalcohol and Flexible Products FP365-6 polyalcohol.
- 4. the material of claim 1, wherein polyurethane foam comprises that further the acrylic polymer of capacity is to give this material mouldability.
- 5. the material of claim 1, wherein this material can absorb its weight 5-20 water doubly.
- 6. the material of claim 5, wherein this material can use standard device to carry out compression molding.
- 7. the material of claim 1, wherein this material is to use hydrophobic or hydrophilic acrylic compounds, polyester or polypropylene fibre blend to carry out fiber acupuncture.
- 8. the material of claim 1, wherein super absorbent polymer immerses in the described non-woven combing material.
- 9. the material of claim 1, wherein super absorbent polymer is a kind of component in the polyurethane foam.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 97196062 CN1224372A (en) | 1996-05-30 | 1997-05-30 | Absorbent footwear material |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US60/018,898 | 1996-05-30 | ||
| CN 97196062 CN1224372A (en) | 1996-05-30 | 1997-05-30 | Absorbent footwear material |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN1224372A true CN1224372A (en) | 1999-07-28 |
Family
ID=5179539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 97196062 Pending CN1224372A (en) | 1996-05-30 | 1997-05-30 | Absorbent footwear material |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1224372A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100369960C (en) * | 2000-12-20 | 2008-02-20 | 永井匡 | Porous polyurethane and mfg. method therefor |
| CN101454396B (en) * | 2006-05-22 | 2011-10-12 | 巴斯夫欧洲公司 | Shoe sole exhibiting water absorbing properties |
-
1997
- 1997-05-30 CN CN 97196062 patent/CN1224372A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100369960C (en) * | 2000-12-20 | 2008-02-20 | 永井匡 | Porous polyurethane and mfg. method therefor |
| CN101454396B (en) * | 2006-05-22 | 2011-10-12 | 巴斯夫欧洲公司 | Shoe sole exhibiting water absorbing properties |
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