CN85106734A - The combination of breathable baffle - Google Patents

Abstract

A kind of sanitary towel that has ventilative non-textile spoiler layer is provided here, and impermeable barrier wherein is the meltblown non-spinning polyolefin fiber net to be linked to each other with spunbonded polyolefin fiber net form.This spunbonded polyolefin fiber net provides a bearing plane for the sticker that is bonded on the medicated clothing.

Description

The combination of breathable baffle

What the present invention relates to is a kind of sanitary towel, particularly about the breathable baffle of sanitary towel.

Sanitary towel is that the component by three separations constitutes.A kind of is the nonwoven film that allows fluid see through, and covers usually on the component that can absorb water, and this film is designed to fit with the health of wearer.A kind of is the impermeable barrier that does not allow fluid see through, as preventing that liquid from partly leaking out on the medicated clothing of wearer from the suction of sanitary towel.

These impermeable barriers can directly be attached on the absorbent composition with method of superposition together with film, and these films spread all over and round impermeable barrier, this impermeable barrier can also place outside the film, thereby form the sanitary towel outside and the bottom.In in the past 10 years, the sanitary towel that has these external impermeable barriers is more and more general, and one of them reason is that the less sanitary towel of volume is more and more welcome.These sanitary towels are that underwear end liner or extra-thin sanitary towel need not add shell and just can be used as stable and become complete liner lamination, in addition, because this sanitary towel produces easily, so this impermeable barrier is to place outside the bottom and other assemblies of sanitary towel.Traditional impermeable barrier is made with the thermoplastic sheet, though it is very thin and not expensive, can produce the sound when wearer is walked, and the skin of the wearer that can wear and tear.And these impermeable barriers do not allow fluid see through, and also do not allow simultaneously vapour transmission, and effusive antiperspirant was not easy from sanitary towel to remove when sanitary towel was dressed in this expression, and the moisture of vaporizing in the effluent is then still stayed in the scope of sanitary towel.This air-locked impermeable barrier has prevented the circulation of air, and the abnormal smells from the patient that menstruation is produced strengthens.

In addition, the impermeable barrier that is in outside other components of sanitary towel must have enough intensity and integrity, be bonded at the sticker on the medicated clothing and prevent when changing sanitary towel so that lay, the sticker that is bonded on the medicated clothing is torn sanitary towel when the interior medicated clothing of wearer is removed.

Once repeatedly appreciated a kind of welcome impermeable barrier of examination design, this impermeable barrier does not allow fluid see through, and only allows the moisture of vaporization see through in the past.United States Patent (USP) the 3rd, 595, No. 235 is representative prior art, has wherein revealed a kind of impermeable barrier, but there is no the preparation method of describing this impermeable barrier.United States Patent (USP) the 3rd, 989 has been revealed a kind of impermeable barrier made from the upper conical hollow protrusion of polyethylene film No. 867, it is said that this impermeable barrier does not allow fluid see through but can allow gas permeation.UK Patent Application the 2nd, 035, the liner of revealing a kind of absorbent products No. 092, this liner is to make with a kind of polyester staple fibre of nonwoven, and has applied one deck waterproof and gas-pervious sticker.United States Patent (USP) the 4th, 338 has been revealed a kind of blow-out patch made from the polyolefin elastic fibers No. 371, and this liner is ventilative but do not allow liquid see through.United States Patent (USP) the 4th, 240, revealed that a kind of usefulness does not conform to the nonwoven that the staple fibre of binding agent makes and hides for No. 416, it promptly is the spunbond nonwoven web of one deck, wherein only coating wetting agent with the one side of Body contact, this patent reveals that the not processed one side of this fleece is gas-pervious, but can resist fluidic infiltration.United States Patent (USP) the 4th, 059 has been revealed a kind of underwear blow-out patch product that has the non-woven impermeable barrier of meltblown in No. 114, and this impermeable barrier is to make with the meltblown non-woven webs of allyl olefin(e) fibre, does not allow fluid see through but allows gas permeation.In addition, have other several patents all the cover layer that cellulosic material is made to be handled, make it bear fluidic infiltration, according to the character of this processing, these impermeable barriers can also be breathed freely.

More than impermeable barrier that each patent provided all be imperfect, this shortcoming may be that the actual of convection cell stops, or on the one hand can have enough intensity to tear and can provide suitable supporter for the sticker that is bonded on the medicated clothing on the other hand, or on its pliability and the quiet degree shortcoming is arranged with opposing.

By the external impermeable barrier that the invention provides a kind of sanitary towel, this impermeable barrier has a kind of soft feel as cloth.This baffling layer has enough intensity and integrity, so that for the sticker that is bonded on the medicated clothing provides a supporter, and when wearer is changed sanitary towel, can prevent tearing of sanitary towel.This baffling layer provides high-air-permeability, and can prevent fluidic seepage, and this baffling layer is the combination of meltblown non-woven webs and spun-bonded fibre net, and this spun-bonded fibre net provides an external stayed surface for the sticker that is bonded on the medicated clothing.

Can more easily understand the present invention with reference to the accompanying drawings, wherein:

Fig. 1 and 2 is the tail cross section of different structure that has the sanitary towel of external impermeable barrier.

From Fig. 1 as seen, a N of sanitary towel has the assembly 12 of a suction, and the fluid-tight cover layer 11 of one deck surrounds this component fully.What be connected in fluid-tight tectal bottom lap is impermeable barrier 10 of the present invention, and this impermeable barrier is made up of 13 and 14 two-layer institutes.13 these floor are one deck such as Nei Fuer institute (Naval Research Lab) non-woven microfiber webs of (including in this as a reference) described flame spraying in No. 4364 reports that proposed on May 25th, 1964.Impermeable barrier facing to water accepting layer is preferably made with polypropylene, but also can adopt other olefin(e) fibre.This net preferably includes less hole, can adopt the fiber of thin diameter (normally 10 microns or lower), allows these fibre compact ground form tiny capillary tube.With the suitable net that these microfibres are made, its basis weight be every square metre 13.0 to 28.0 the gram between.This less micro cautery provides the transmission of gas and steam on the one hand, and makes fluidic transmission lower (but not being to stop fully) on the other hand as far as possible.It is found that when the sticker of pasting medicated clothing directly is added in this meltblown non woven fibre online the time, this fleece does not have enough intensity to tear preventing, therefore, this fleece is inapplicable fully to be the impermeable barrier material.And though this fleece multiviscosisty during to certain degree, the non-woven impermeable barrier of this meltblown can become does not allow fluid pass through, do like this can institute must architectural characteristic destruction.

Being attached on the meltblown non-woven webs 13 is independently spun-bonded fibre net 14 of one deck, and this spunbonded polyolefin fiber net is for example at United States Patent (USP) the 3rd, 692, has described (repair and record in this as a reference) in No. 618.When this spun-bonded fibre net is kept every square metre of basis weight that is no less than 8 grams, can be and add that the sticker that is bonded on the medicated clothing provides enough intensity, and can prevent sanitary towel when interior medicated clothing is removed the possible impermeable barrier that this is torn.Because product weight is low and belong to fiber footpath type, even if when being connected with the meltblown non-woven webs, this spun-bonded fibre net also can not become the barrier of gas and steam.

Measure cloth or other fibroreticulate methods are to measure with " feel "." feel " is the combination of skin-friction force and flexural rigidity, and the traditional instrument that is used for measuring these characteristics is a Thwing-Albert Handle-O-meter.This instrument has an opening, the material that must measure be placed on this opening, make one to promote rod and descend then with fixed speed, measure again make this weaving sample crooked cross this opening the strength of palpus.In Hardle-O-meter 211-5 type, its breach is 0.5 inch, and its pressure head blade (promptly promoting rod) is 0.125 inch, if the size of catalog is 4 " * 4 ", concerning a kind of suitable deformable choked flow combination, the measurement result of this feel is between 12 and 20 grams.The combination of this impermeable barrier can stick into nonvolatil binding agent, and best is fuses by the fusion pattern of Fig. 1 and Fig. 2, and Fig. 1 and Fig. 2 also demonstrate each fusion points 15.If the interfused words of the assembly of impermeable barrier, this is sticking spin must be compatible with the non-woven choked flow material of meltblown, that is to say that they will be in similar identical temperature fusion, so that two-layer can being connected.In this technology, well-known is to fuse fleece at an easy rate under suitable heating power and pressure, and adherent area is to be no less than 5% between impermeable barrier, and best is between 10 to 25%.Being apparent that does not have fluid to pass through in bounding point.

The overlay that preferably in this choked flow combination, adds one deck waterproof, the combination that forms can be passed through the dip-coating process, and the waterproof coating that is applicable to this combination is the waterproof 3M fluorocarbon of a kind of FC-808 of being called, the fluorocarbon that also can adopt other to be suitable for, owing to quality is had harmful effect, so seldom handle with the silicon of waterproof.This choked flow combination can be attached on other components of sanitary towel with the method for pasting, and can also fuse with the bottom of nonwoven fleece or absorbent composition or with both.In the described concrete device of Fig. 2, nonwoven thermoplastic cover layer of one deck and choked flow combination fusion, this impermeable barrier and tectal edge all stretch the edge above water accepting layer on the both sides of sanitary towel.

Impermeable barrier described here clearly can be used for other suction product, in these products, owing to do not adopt the sticker on the medicated clothing of being bonded to pressure sensitive, therefore, its intensity and can not become important factor to the resistance of tearing.

Claims (6)

1, in a sanitary towel that the bottom surface arranged, be included in the cover layer that has one deck to see through on the surface layer by fluid, one is placed on above-mentioned cover layer and at bottom and the water accepting layer between the fluid-tight impermeable barrier, and be connected bottom and to the sticker on the medicated clothing of being bonded at of pressure sensitive, improved feature wherein is that above-mentioned impermeable barrier is to be formed by multiple layer combination, this combination comprises the spunbond polymer fiber net of every square metre of 8 grammes per square metres the rarest and every square metre of non-woven polymer fiber net of meltblown that the weight between 13.0 to 28.0 grams is arranged, and above-mentioned sticker is exactly that to be connected in above-mentioned spun-bonded fibre online.

2,, it is characterized in that this combination makes with fusion process by the described sanitary towel of claim 1.

3, by the described sanitary towel of claim 2, it is characterized in that this fuses area minimum is 5%.

4, by the described sanitary towel of claim 2, it is characterized in that this fusion area is between 10 to 30%.

5,, it is characterized in that this combination is once with the compound treatment mistake of preventing liquid by the described sanitary towel of claim 1,2 or 3.

6, by the described sanitary towel of claim 2, it is characterized in that those polymer are compatible.

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