HUE029519T2 - Thermal protection accessory - Google Patents

Abstract

The accessory e.g. glove (1) has a textile layer (10) including an external surface and an internal surface, where a coating (20) covers a portion of the external surface of the textile layer. Barbs (30) are distributed on a surface of an area of the coating, where the textile layer includes glass fibers, metal fibers, or aramid fibers. The coating is made of a polymer of the family of nitriles, where the coating covers a palm (2), a lower part (3i), and a distal part (3d) of fingers (3) of the glove. An independent claim is also included for a method for manufacturing a thermal protective glove.

Description

THERM AL PROTECTION ACCESSORY

FIEL!) OF 'HIE INVEN TION

Th» present discussion relates to a thermal protection accessory and a method for manufacturing a thmnal protection glove.

Such a thermal protection accessory may he used in certain- industries for handling hot pans, optionally oily or greasy parts, with great dexterity and strong thermal insulation,

ST ATE OP TH E PRIOR ART in many industries, workers are led to handle quite hot parts or tools, having temperatures winch may vary in a wide range commonly from 50 *C to 250 and -which therefore require suitable protection means,

Verj- conventionally, the weaker;; use i hermái protection gloves traditionally known under the name of Noop gloves’'. As their name implies, these loop gloves consist of textile loops with a strong mesh, typically in cotton, the thickness of which allows thermal insulation·»

However, because of their great thickness, these gloves provide degraded dexterity, sifted, tactile· sensations, and there fore make it dillcul! to grasp small objects and precision work. Farther additionally, it. is all the more easy to commit errors, and notably to let go of objects, since these gloves, do not provide very good adherence. These gloves, rather intended tor coarse work like hartdimglarge stste parts, are therefore not adapted So the work requiring greater accuracy or thoroughness ott behalf of the worker.

Further, these gloves, because of their essentially textile structure are hot leak-proof and are litereidre not adapted to oily or greasy conditions. Indeed, die oils and greases present on the objects to be handled may impregnate tire glove and theroldre generate a thermal bridge reining the insulating properties of the textile loops. Naturally, this impregnation of oil or grease also reduces the adherence and the dexterity of the glove and is detrimental to the comfort of the user. IP 2000 528 328 is also known wind; describe* another type of glove including a textile layer interspersed with protrusions, the textile layer and the protrusions being covered by a polymeric coating. US 4,150.783. JP 200.2- 129418 and JP 20111662 are also known which describe gloves including g polymeric layer provided with rassed/reeessetl portions obtained in different ways, itt US 4,359,783-, the ralsed/recessed are generated by drawn wires; in IP 2002-129418. these are concavities obtained by projection of mtdtiple particles; in JP 20! 1--1662J:he resin is foamed.

Therefore there exists a real need for a protection accessory and a method tör immuiacturmg a thermal protection glove whleh at least partly are wilhoat the drawbacks inherent to the aforementioned known gloves.

PRESENTATION OF THE INVENTION

The present discussion tdates to a thermal protection accessory, It comprises a textile layer etwoprisiog a first surface and a second surface, a coaling covefi&g at least one -portion of the first surface of the textile layer, -and studs distributed at the surface of at leasl one area of the coating. Düring ihn of this accessory, the user tô hé protected is in contact with the second surface of the textile layer while the hot object ns for it Is on the side of the first surface, i.e, on the side of the coating and of the studs. in addition to its rote of thermal insulator, the textile layer provides contact comfort anti allows the other protection elements formed here with the coating and the studs to be supported.

The coating produces another thermal barrier facing the hot object: its contribution to the thermal iasidstion gives the possibility of reducing the thickness of the textile layer for a given msuiadort quality. Consequently, the thickness of the coating is generally small as compared with the iftlckftess of the textile layer, the reduction in the thickness of {he textile layer causes a reduction in the total thickness of the accessory and therefore better dexterity: the tactile sensations, ate thus less stifled, the movements arc less hindered, which allows better control of the handled object and greater accuracy 1« its handling, further, the coating achieves the seal of the accessory in the case of. handling of oily or greasy objects notably. Consequently, the textile layer is protected and is not impregnated: therefore no thermal bridge is formed, which preserves the insulating qualities of thé accessory. The comfort provided by the textile layer is further preserved,

The studs, as for them, play several roles. Ott the one hand, they improve the grasping of the objects and limit their sliding, notably in the presence of oil or grease. On the other hand, they play a significant role in the thermal insulation ptovtrted by the accessor)·' by moving away the source of heat, |,e, the handled object from lbs user. Further, the studs give the possibility of limiting the points of contact with the source of heat and of maintaining an air film between the heat source and tint surface of the coating thereby greatly limiting heat transfers, in curtain embodiments, the accessory tv a glove or-a hand pad: In such a ease, the first and second surfaces are respectively the outer and inner surfaces of the textile layer of the glove or of the hand pad. This embodiment is the most i;n it aide for industrial use. However, in other emhodimeuts, the accessory may he formed around a cloth or a weh notably playing the role of the textile layer.

In the present discussion, the adjectives 'lower”, “upper” and the like are defined with respect to a reference position in which the hand wearing the glove lies fiat, the palm directed downwards. The adjectives "inner" mû "outer' as for them are defined with owpeot IP the contour surface of the glove: in other words, the “inner” adjective relaies to the space where the hand is accommodated while the adjective "outer" is related to the surroundings, of the glove, la certain embodiments, the textile layer fe made without any scares This allows better comfort and better finishing, notably Íróm an estheticai point of view. Further, the knitting method without any seam does not generate atiy scratch, which is a gain in savings. Therefore, the use of mot« expensi ve technical fibers is sot discouraged, 1st certain embodiments, the textile laver consists of fibers with low heat conductivity,

In certain embodiments, the textile layer is mainly made in cotton. Cotton is comfortable, Is a faxai heat insulator, inexpensive, and easy to work with which ensures reduced manufacturing cost.

In other .embodiment, the textile layer is in polyamide and/or in acrylic. Naturally, most of the natural or synthetic textile fibers may also be contemplated.

In certain embodiments, Ihe textile layer comprises a first type of fibers mainly at the first surface and a second type of 11 hers mainly·'at the seeottd surface. Preferably, the first surface mainly consists öf polyamide fibers while- the second surface mainly consists of acrylic fibers. in certain etnbodimeiiis, the textile layer comprises glass fibers, metal fibers or further aramid libers. The latter give -he possibility of limiting the risk of outs through the accessory.

In vermin embodiments, the gauge of the textile iayor is comprised between ? and I S, preferably between 10 and IS, still preferably equal to about !.>. The gauge of a textile corresponds to the number of rows o f meshes per inch of textile. The higher the gauge, the finer is the textile and its aspect approaches that of the sticker: Sts dexterity increases but its thermal insulation decreases. The smaller the gauge, the thicker is the textile and its aspect approaches that of ts large wool glove: its thermal insulation increases but its dexterity decreases, it has been observed that the gauge ranges shown here· represent a -good compromise between dexterity and thermal insolation considering the additional insulations provided by the coating and the studs.

In· certain embodiments, at least the second surface of'the textile layer has puffing. On the one hand, the contact is more comfortable; on the other hand, the small stir pockets present in the puffing of the textile increases the thermal insulation of the text ile layer,

In· certain1 embodiments, at least the second sirribee of the textile layer has loops. The latter also give the possibility of increasing the .comfort and the thermal insulation of the textile layer. in certain embodiments·, the coating mainly consists of an elastomeric or plastic polymer. These materials actually have good seal, dexterity, ami thermal insulation properties and are easier to apply. This may .notably be natural latex, MBH rubber {nMl0"-bul»dS«ne rubber), butyl rubber, polychloropene, styrene--butadiene, synthetic polyisoprene. styrette-ethyietie/butylene·-styrene, fluoro-eiastomers, PVC, TVA, CSM, tfixRR, acrylic, PU, BVA, plastistds or other comparable materials. This may also be a -mixture· of two or several polymers. in certain embodiments, the coaling comprises a polymer tern the family of nitriles. These polymers actually have particularly suitable physico chemical properties for use under oily or greasy conditions, They further have good resistance to abrasion.

In certain embodiments, the coating comprises two layers of coating. These may be two layers of the same coating successively nw.de or of diffeteni layers of (matings. In addition to increasing the thermal insolation, this gives She possibility of making use cd the properties of tvvo different materials, one-material for example may provide the seal while the second cue ensures good grasping, it is possible to contemplate more titan two layers; of coatings, in certain embodiments, at least one portion of the coating is foamed. This fo&oted nature of the mating, gives the possibility of increasing dexterity, notably grasping, and thermal Insulation, by incorporating microscopic air pockets, without compromising the seal of the coating.

In certain embodiments, the coating comprises two coating layers, one of which I» foamed. This is titett preferably the second layer, i.e She surface layer. in certain embodiments, the costing covers the palm and at least the lower portion and the distal portion of the fingers ofiite glove These are actually areas generally in contact with handled object.

In certain embodiments, in order to avoid hindering the movement of the hand and therefore limiting dexterity, only the paint, the lower portion, the side portions and the distal portsott of the frngets are covered with coating, is particular, the back of the tend and at least o»e portion of lise upper portion of the Singers are not covered with coating. tri certain embodiments, the studs mainly constat of an elastomeric or plastie polymer. The polymers which may be used for the coating may also lx- used lor tlx; Kinds.

In certain embodiments, the studs am tirade in the same material ás the coating. In addition to greater facility of application, tins allows better attachment of tee studs ott the costing.

In certain embodiments. the· studs· are substantially fmstoconical or with the Shape of a pyramid frustum, indeed h has: been observed thai··these shapes provide better performances, notably for grasping them.

In other embodiments, the -studs may be substantially hemispherical, parallelepipeds! or of any other shape.

In certain etnbodhMttis,, the studs have a height comprised between about i and 3 mm, preferably between about U and 2 ram. These values represent a good compromise between the dexterity and thermal Insulation performances, hi certain embodiments, the studs have a width comprised between about, 1 and 3 ram. in certain embodiments, the studs am distributed according to an orthorhombic network, 'preferably -a quadratic network with a parameter comprised between 3 and lb mm. in other embodiments, the studs are distributed as staggered 1rs certain embodiments, the studs tire distributed at least on the palm of the glove. They may also be present on the lower portion of the fingers of die glove.

The present discussion also relates to a method for manufacturing a thermal protection glove according to claim I. It comprises notably the following steps: knitting a textile glove, coating a costing over st least one portion of the outer surface <»t the textile glove by soaking in. a coating bath, and setting; into place· sftuk at the surface of at least one area of the coating.

In certain embodiments, these steps are successively achieved in the-order listed above, in other embodiments* fHe setting imo place of studs is carried out before coating the coating, lb certain embed lisent*, die knitting is achieved without any sewing ott a .rechhnesr machine adjusted with a gauge comprised between 7 and 18, preferably between H) and 15, still preferably equal to about 13, in certain embodiments, the knitting uses a plaiting method for positioning a first type of fiber mainly ai the enter surface <sf the textile glove and a second type of fiber mainly at the inner surface of the textile glove, in certain embodiments, the knitting step forms loops on the inner surface of the textile glove.

In certain embodiments, the method farther comprises a step for mechanically scraping the inner surface of the textile glove in order to impart puffing to it. It may notably be achieved by means of metal miters, in certain embodiments, die glove is slipped onto a form in china during the soaking in the coating bath, in certain embodiments, the leading angle audfor the confirraat ion of the glove during the soaking are adjusted for coating the palm and at least, one distal portion of the lingers. in certain embodiments, the method farther comprises a step for generating porosities in the coating, ht certain embodiments, the coating bath is a foamed coating bath,

In certain embodiments, the method comprises a step for sanding the coating by protecting' particles. Preferably these particles are grains of common salt. These may also be crystals erf any other salt, but or more broadly any chemical species; these may be notably ice crystals, is is also possible to use other abrasive particles stich as sand or metal filings, This step stray be carried out on an already foamed coating In orderto diversify the size of the porosities noiahly.

In certain embedlntents, the studs are set into place by coating. in certain embodiments, the coating of she studs is carried out by coating with a perforaied plate and a doctor blade. In such a case, she perforated plate is positioned flat on the coated portion of the textile glove; polymer is poured onto the plate In order to till the boles; a doctor blade will scrape the excess polymer at the surface of the holes. in certain embodiments, the method further comprises a step for vulcanization of the coati ng and/or of the studs.

The aforementioned features and advantages, as welt as other ones, will become apparent upon reading the detailed description which follows, of exemplary· embodiments of the proposed device and method. This detailed description refers to the appended drawings.

SHORT »ISCRirriON OF THE HRAWIMSS

The appended drawings are schematic and especially atftt at illustrating: the prmc-ples of the invention. 18 these drawings*, from one Figure (fig.): to the other, identical elements (or dement portions): are marked with the same reference symbols. fig. I is a front view of an accessory according to the invention.

Fig, 2 is a fear threwxpmrter view of the accessory of Fig, I,

Fig. 3 is a schematic .sectional view of a portion of the accessory «>f Fig. i.

ÖMTAILEÖ ölSCRiniöH ÖF EXEMPLARY ICÍVfEÖÖlMENTS

Is order to make the invention more practical, examples of accessories and of methods according to the invention .are described in detail hereafter, with reference io the appended· drawings, It Is recalled that the invention is not limited to these examples.

Figs, I and 2 illustrate a« exemplary embodiment of a ·. thermal protection accessoty assuming the shape of a glove I according to respectively, a front view and a reap three--<|tiarier view, PIG. 3 schematically illustrates, without being enneerned with scale and proportion,, fidiably, tire sectional structure cd the glove 1, This section rrtay notably correspond to the area of the palm 2 of the glove I.... An example tor apply lug a method ihr rnamrtactnring such a thermal protection glove i will fee .described simultaneously.

This glove I first of dll comprises a textile loyer 1Ô 'in polyamide ΡΛ6 and acrylic, This textile layer 10 is knitted without any sewing according to the shape of a glove with a desired size on a rectilinear machine. The latter is adjusted ou a gauge S 3 for giving the glove I quality Ihermai Insulation while retaining good dexterity.

This textile layer 10 Is knitted with it plaiting method gnung the pussibility of positioning the polyamide PA6 fibers mainly dit the Side Of the outer surface 11 of she textile layer K> and the acrylic fibers .mainly on the side of the in tier surface 12 of tlie textile layer 10.

During knitting, glass fibers, metal, fibers or further arámid fibers may he added so as to further provide to the user U protection against cuts, Stainless steel or Kevlar fibers may typically be used, Spandex .fibers are also added tor providing soute elasticity to ike textil« layer HI.

Once- it is knitted, the inner surface 12 of the textile layer IÔ undergoes a meebanicai scrapingstep by means uf metal rollers b order to impart: pnffistg 15 to it. This puffing 15 comprises pockets and passages in which air remains trapped âftd thus reinforces the thermal insulation of the textile layer 10.

Once it is Completed:, the textile layer 1Ö is slipped arid shaped on a forte hí china for preparing it for soaking jft a coating bath. The confirmation of the shape In china, and thpfftfore of the textile layer Hi. as wed as leading tutgle according to which the textilé layer 1Ö is immersed Into the coating bath, give the possibility of coating the desired area(s) of the outer surface ! 1 of the textile layer 10. ?n this exemplary embodiment, a costing layer 20 covers the palm 2, the lower portion 31 tsf the fingers 3, the side portion 31 of the fingers 3, and the distal portion 3d of the fingers 3. Mere, the distal pontos 3d corresponds to the portion surrounding the last phalanx of each finger. Conversely, the back ofthe glove 4, the handle 5 and an upper portion 3s of each finger 3 which does not correspond to the distal portion 3d is not covered by tire coating 2Ö. The areas covered with coating 20 arc actually those which are brought so as to be in contact with the hot Object O, The areas not requiring this, are not covered with coating 20 for preserving the dexterity of the glove 1,

The coating 30 is m elastomeric polymer from the family of nitriles, here MB'S, rubber (nitrile butadiene rubber), further, the latter is ibanted, ie. it has a feam texturewith many snieroseopic cavities in which air is contmed, thereby reinforcing the thermal insulation of the coating 20, in this exemplary embodiment, the textile layer Hi has undergone soaking is an already foamed coating hath. Further, the thereby obtained foamed ooatissg layer 20 has also undergone a complementary sanding treatment during which grains of sand have been projected onto the coating layer 20. The impacts of the sand grains actually allow generation of rough portions at the surface of the coating 20.

In other embodiment examples, this sanding treatment may be carried out with grains of salt. In addition to the fortnithon of rough portions under the effect of the impacts, the grains of salts retained by the coating esuse the formation of cavities during their dissolution,

The coating 20 is then vulcanized in tin oven at a temperature comprised between 70 SC -and 139 '-Ç lor ensuring the stability of the coating layer 20 on the textile layer 10.

Once the coating 20 is dry and ynicauixed, it: is preceded with the coating of studs 30 on certain areas of the coat ing 20. 1st tins exemplaty embodiment, the Studs 30 are conical, their tip directed towards the hot object Q, and measure about: 2 mm in height Idr a diameter of 2 mm. They are made in the same material as the coating 20, i.e. preferably an elastomeric polymer of the nitrile: type such as NBR rubber.

The studs 30 are here distributed over the: surface: of the paint 2 and of the lower portion: 3:i: of the fingers 3 according to a regulát' quadratic network and unmietrupted with a parameter about equal to 3 nun and directed along the main direction of the glove 1. hr order to achieve coating of the studs 39, the glove 1 is slipped on fiat, the coated areas: directed upwards, on a fiat metal form intended to flatten and smooth the coated surface of the glove 1. A perforated plate including a network of holes corresponding to the desired locations of the studs 3Ö is then applied on the coated surface of the glove !. A scrape will theft, pour polymer Info the holes white scraping the excess polymer overflowing front the holes. The perforated plate is inest removed once the coating is completed.

The shape of the studs 30 is given by the shape of the holes - of the perforated plate and may be corrected during ft post-treatment step for these stud blanks betöre their vufeaofeation. The shape of the studs 30, conical here, may thus be; obtained by simply making use of the viscoplastic flow of the stud blanks or by

Claims (7)

1. applying, io them a specific shaping treatment Once the desired shape is obtained, the strafe 30 are rapidly overset! during a vtdeanixation step in order to ensure their stability and their good adhesion «ο the coating 20, The embodiments or exemphoy embtxiîments -described in the present discussion are given as m ishistraiioa and are non -limiting, one skilled ist tire art being easily capable, considering ibis discussion, of modifying these embodiments or exemplary embodiments, or contemplât© other embodiments, while remaining within Use scope of (he invention. Further, the different characteristics of these embodiments or exemplary embodiments may he .used aione or he combined togeihet. When they are combined, these characteristics may he combined as described above or differently, Ihe invention not being limited Us the spéciik: combinations described in. the present .'discussion. In particular, unless Indicated otherwise, a characteristic described in connection with tut embodiment or an exemplary embodiment way he applied in a way like any other embodiment or exemplary embodiment, HÖVÉltté FELSZERETÉS SZABADALMI ιι&amp;νυροντοκ L Eljárás hovédö kesztyű gyártására, azzal jellemezve, hogy az eljárás sortot: elbàilitunk egy textil kesztyűi (10}·, a textil Kesztyű ( 10) küfeö feiölctéxtek Π I) legalább egy részét bevonjuk egy bevonatta] (20) bevonó íiífdóbe történő beiktatással. pórusokat alakítunk ki a bevonatban (20) rés/ecskesugár alkalom/ásával. és tüskéket helyezünk el a bevonat (20) legalább egy zónájának felületen, amely tüskék magassága legalább 1,5 kim.
2. 2. .Az i. igénypont szerinti eljutás, azzal jellemezve, hogy további lépéskéstí tviegkapatjyk a textil kesztyű (10) belső felületét ( 12). ezáltal bnggyossá tesszük azt,
3. 3 . Az 1. vagy 2, igényponí szét inti eljárás, azzal jdlémézvéj hogy a tüskék (30) ethclyezéï.éî egy perlő-fáié lemez és egy kaparópenge segítségéve! végzett bevonással hajijuk végre,
4. 4. Az 1-3, igénypontok bármelyike szerinii eljárás, azzal jellemezve, hogy a íextiiréíeg (10) üvegszálakat, fémszálakat, vagy arámid szálakat tartalmaz.
5. 5, Az 1-4, igénypontok bármelyike szét inti eljárás, azzal jellemezve, hogÿ a textilréteg (10) száisűrüsé-ge ? és 18 közötti, előnyösen 1 ö és ! 3 közötti, még előnyo.>öbben megközelítőleg I3> 6: Az 1-5. Igénypontok' 'bármelyike szerinti eljárás. a*«»l jellerrKízve, hogy a bevonat (20) a rötrilcsoportba tartozó polimert taríamsaz. ?, Az i-ó. igénypontok bármelyike szerinti eljárás, azzal jellemezve, hogy a bevonó fürdő egy babos bevonó íiudó.
6. 8. Az I - 7. igénypontok bármelyike szerinti eljárás, azzal jellemezve, hogy -a bevonat (20) bevonja a femyétrés» i?.) és a kesztyű (1 ) ujja inak 0) legalább az alsó részét (3i) és a távoli részét (3d).
7. 9. Az Mi. igénypontok bármelyike szerinti eljárás* azzal jellemezve, hogy a tüskéket (30) ugyanabból az anyagból készítjük, mim a bevonatot (20). H), Az MA Igénypófitokbármelyike szériáit-e:jjáráá* azzal jellemezve, hogy á tüskék í30) lényegében ésönkakúp vagy esonkâgâla alákaak,