SE2150111A1 - Flame retardant multilayer protective glove comprising a palm part arranged with aramide fibers - Google Patents

Abstract

This invention relates to a flame retardant protective glove (1), preferably in the form of a finger glove, having an outer shell comprising a palm side (2), a back side (3), an outer side (4) and a thumb side (5), wherein the material in the back side (3), outer side (4) and a thumb side (5) comprises at least one first multilayer material (M1 , M3) comprising an outer layer (30 A) of a flame retardant material and said palm side (2) comprises a second multilayer material (M2) different than said at least one first multilayer material (M1, M3), wherein said palm side (2) comprises at least one palm part (20) made of said second multilayer material (M2) having an outer layer (20A) of a flame retardant material comprising Chlorosulfonated Polyethylene and a second layer (20B) including at least 80% aramide fibers, suitably Para-aramide fibers, preferably at least 90% aramide fibers and more preferred 100% aramide fibers, wherein said second multilayer material (M2) has a surfacic mass of between 400 to 1200 g/m2, preferably 500 to 1000 g/m2and a thickness of between 0,5 to 1,5 mm, preferably 0,6 - 1 mm, and is resilient having an elongation at break (ε) of at least 20% in all directions.

Description

FLAME RETARDANT PROTECTIVE GLOVE TECHNICAL FIELD Flame retardant protective glove, in the form of a finger glove, having an outer shellcomprising a back side, a thumb side, an outer side and a palm side, wherein at least thematerial in the back side, a thumb side and a outer side comprises at least one firstmultilayer material, comprising an outer layer of a flame retardant material and saidpalm side comprising a second multilayer material different than said at least one first multilayer material.

STATE OF THE ART Flame-retardant protective gloves are a prerequisite for certain professions in order to beable to handle certain occupations that are part of the performance of duties withsufficient security. Examples of such occupational groups are fire fighters, the military,police, ambulance personnel etc. Flameproof gloves are generally known. For example,a protective glove is known from SE 458 254. The protective glove has the shape of afinger glove. The glove consists mainly of leather whose inner surface has beenprovided with a plastic coating. In addition, the glove is provided with a lining ofrefractory and heat-insulating material. Such a protective glove becomes relativelyawkward due to the plastic-coated leather becoming relatively rigid. In addition, the combination of materials makes it difficult to wash and decontaminate.

From US 5,020,l6l and WO97/472l2, there are known flame-retardant protectivegloves that aim at providing similar properties as the glove mentioned above, butwithout use of leather. A general problem with this known kind of gloves is that the grip in wet conditions may become bad and therefore may jeopardize safety for users.

BRIEF DESCRIPTION OF THE INVENTIONIt is an object of the present invention to find a solution to the above-mentionedproblem complex, which is achieved by means of a flameproof protective glove as defined in claim 1.

Thanks to the invention, a flame-retardant protective glove is obtained Which in asurprising Way at the same time provides good comfort, good protection, good grip ability, good Wear resistance and Which may securely be Washed and decontaminated.

According to a further aspect of the invention: - the second multilayer material (M2) has a larger elongation at break (sp) in alength Wise direction (F) than the elongation at break (sw) in a width Wisedirection (W), Which may provide for extra good strength properties of theglove. - the second multilayer material (M2) has its largest elongation at break (sp) in alength Wise direction (F), Whereas the first multilayer material (M1) has itslargest elongation at break (sw) in a width Wise direction (W), Which mayprovide for extra good strength properties of the glove. - second multilayer material (M2) has a tensile strength (o) of at least 15 daN/5cmin all directions, Which may provide for extra good strength properties of theglove.

- The palm side (2) comprises at least one palm part (20) and at least one thumbpiece part (61) made of said second multilayer material (M2), Which mayprovide for good ergonomic quality of the glove.

- The at least one first multilayer material (M1, M3) includes a first multilayermaterial (M1) comprising a basic protective layer (30B) including mainlyaramide fibers, suitably Para-aramide fibres, and possibly also other fibres, e. g.polybenzimidazole fibres and a coating comprising silicone, Wherein the amountof aramide fibers is larger than the amount of other fibres, e. g.polybenzimidazole fibers, Which may provide for an extra good combination ofstrength and heat resistant of the glove, Wherein preferably at least a back sidepart (30) of the outer shell is made With said first multilayer material (M1) andmore preferred also a thumb piece part (61).

- The outer shell includes a third multilayer material (M3) comprising around 50-70 % Polyamide fibers and 30-50% aramide fibers, suitably Para-aramide fibers, preferably the amount of polyamide fibers is larger than the amount of aramide fibers, which may provide a combined outer shell optimizing strength, comfortand heat resistance, wherein preferably at least a plurality of finger side part (70-73) of the outer shell is made with said third multilayer material (M3) and morepreferred also at least one hand side part (40, 50). - an insert (9) is arranged within said outer shell, comprising at least one fireblocker layer (9lA, 9lB) and at least one aramide fiber containing layer (92),suitably Para-aramide fiber, wherein preferably the insert (9) has a larger amountof fire blocker material (9lA, 9lB) at the back side (3) than at the palm side (2),more preferred a liquid-tight membrane layer (90), preferable breathable, is arranged in said insert (9).

BRIEF DESCRIPTION OF FIGURES In the following, the invention will be described in more detail with reference to theaccompanying figures, in which: Fig. 1 shows a perspective view of a preferred embodiment of a glove according to theinvention seen from above, Fig. 2 shows a perspective view from below of the preferred embodiment of the gloveaccording to the invention, Fig. 3 shows a cross-sectional view along A-A in Fig. l, Fig. 4 shows a cross-sectional view along B-B in Fig. 3, Fig. 5 shows a preferred embodiment of a back-side part of the preferred embodiment ofa glove according to the invention, Fig. 6 shows a preferred embodiment of a palm-side part of the preferred embodimentof a glove according to the invention, Fig. 7 shows a preferred embodiment of a first thumb piece part of the preferredembodiment of a glove according to the invention, Fig. 8 shows a preferred embodiment of a second thumb piece part of the preferredembodiment of a glove according to the invention, Fig. 9 shows a preferred embodiment of a plurality of parts for the preferredembodiment of a glove according to the invention, one thumb piece part, two side parts and four finger side parts.

DETAILED DESCRIPTION Figs. 1 and 2 shows a preferred embodiment of a glove according to the invention fromabove and below, mainly intended for fire fighters and similar use. The glove is partlymade of elastic material, which makes the glove easy to put on and take off andprovides good comfort. Through many years of testing of different types of designs andmaterials, the inventors have arrived at a preferred combination of layers for use in thepalm side 2 of an elastic multilayer material, which well meets these complexrequirements for fire fighter gloves and similar uses, e. g. meeting the requirements of European standards 420,659 and 388.

In Fig. 1 and Fig. 2 there are shown two perspective views of an exemplary fire figterglove in accordance with the invention. The glove comprises a palm side 2, a backside3, an outer side 4 and a thumb side 5. The thumb is marked with reference sign 6 andthe remaining fingers are given reference number 7. Further, there is shown that the glove also includes a cuff 8.

The glove basically includes three different materials in the outer shell. There is a firstmaterial M1 that is used for the backside 3 in the form of a relatively large backsidepiece 30. There is also a part 60 made in the first material M1 that is used as one of aplurality of pieces for the thumb 6. Further, the first material M1 may also be used forthe cuff 8.

The second material M2 is used for the major part 20 of the palm side 2 and also for an inner piece 61 for the thumb 6.

The third material M3 is used in the form of a first side piece 50 on the thumb side 5 ofthe glove and a second side piece 40 on the outer side 4 of the glove. Furthermore, thethird material M3 is used for a plurality of finger side pieces 70, 71, 72, 73. Finally, thethird material M3 is used for a third piece 63 of the thumb 6.

There may also be made use of a fourth material 83 for the cuff edge and for thetransition zone between the cuff and the glove part. Preferably, made of the same fourthmaterial there is positioned an eyelet device 81 along the palm side of the cuff 8 to assist in putting the glove on. ln Fig. 3 there is shown a cross-sectional schematic view of the glove according to Figs.1 and 2 along line A-A. It is shown that the glove basically comprises an outerprotective shell and an inner protective insert 9. Preferably, the insert 9 is fixated to theouter glove shell by means of seams (not shown) at the fingertip points and also aresilient seam/s 95, preferably Nomex thread, corresponding to a position adj acent the wrist.

In Fig. 4 there is shown a more detailed cross-sectional view along lines B-B in Fig. 3,in order to in more detail explain the different materials used for a glove according tothe invention. Firstly, it must be mentioned that the inset 9 may be produced in a largevariety of different materials in accordance with the invention, depending on differentneeds for different uses of a glove according to the invention. ln the shown exemplaryembodiment the glove is intended for firefighting purposes and provided with preferredcombination of materials, without any limitation to such a combination, wherein thecombination of materials of the glove 1 may provide protection against harmfulbiological agents, cuts by hand-held chainsaws, high-pressure jets and bullet wounds orknife stabs.

Starting from the backside 3 there is a first shell material M1 comprising an outerprotective layer part 30, se Fig. 5, comprising a basic protective layer 30B and coating30A. In the shown preferred embodiment the first shell material M1 comprises a basicprotective layer 30B including 70-80% aramide fibers, suitably Para-aramide fibres, and20-30% other strong fibres, e. g. polybenzimidazole fibres, preferably in the fonn of ahalf cardigan stitch-knitted fabric. Preferably the aramide fibers are para Aramidefibers. The coating 30A preferably comprises silicone. The weight being in the range of300 - 600 g/mz, preferably at least 400 g/mz and a thickness of between 0,8 to 1,8 mm,preferably larger than 1 mm and maximum 1,5 mm. The elongation at break s is of atleast 50% in all directions, preferably at least 70% in all directions. Preferably, the firstmultilayer material M1 has a larger elongation at break sw in a width wise direction Wthan the elongation at break sp in a length wise direction W, wherein preferably sw > 1,1 -28F.

As shown in Figs. 1, 2 and 3 also the cuff piece 80 and a thumb piece part 61 may be made in the same material M1.

As shown in Figs. 1-3 the outer shell of the palm side 2 of the glove comprises two parts20, 61 made of the second material M2. The large palm part 20, see Fig 5, covers mostof the palm of the hand and also includes an inner part for the fingers 7. Preferably alsoa thumb piece part 61, see Fig 8, is also made of the second material M2, to provide a really good grip.

The second material M2 comprises a multilayer, cohesive material, having an outercoated layer 20A of a flame retardant resilient material comprising ChlorosulfonatedPolyethylene and a second, base layer 20B including at least 80% aramide fibers,suitably Para-aramide fibers, preferably at least 90% Para-aramide fibers and morepreferred 100% Para-aramide fibers. Preferably the Aramide fibers are para Aramidefibers. The second multilayer material M2 preferably is in the form of an interlockknitted fabric, which provides very good bond for the coated outer layer 20A. has asurfacic mass of between 400 to 1200 g/mz, preferably 500 to 1000 g/mz and a thicknessof between 0,5 to 1,5 mm, preferably 0,6 - 1 mm. The elongation at break s is of at least20% in all directions, preferably at least 40% in all directions. Preferably, the secondmultilayer material M2 has a larger elongation at break sp in a length wise direction Fthan the elongation at break sw in a width wise direction W, wherein preferably sp > 2 Sw, more preferred sp = 3 - 6 Sw.

The second multilayer material M2 has a tensile strength o of at least 15 daN/5cm, in alldirections, preferably at least 20 daN/5cm, wherein preferably the tensile strength op ina length wise direction F is larger than the tensile strength ow in a width wise directionW, more preferred op > 2 ow, and even more preferred op = 3 - 6 ow. Hence, preferablythe second multilayer material M2 has its largest elongation at break sp in a length wisedirection F, whereas the first multilayer material M1 has its largest elongation at break sw in a width wise direction W.

The third material M3 in the outer shell also comprises a multilayer, cohesive material,having an outer layer of a flame retardant material comprising Polyamide fibers and asecond layer comprising aramide fibres. Preferably the Aramide fibers are para Aramide fibers. Preferably the third material M3 includes around 50-70 % Polyamide fibers and -50% Para-aramide fibers, Preferably the amount of Polyamide fibers is larger thanthe amount of Para-aramide fibers. The third multilayer material M3 has a surfacic mass of between 300 to 800 g/mz, preferably 400 to 600 g/mz.

The seams between the parts are preferably made as double seams, and by the use of asewing thread made from 90-100% spun meta aramid fiber, preferably using a vertically integrated aramid manufacturing system.

As shown in Fig. 4 regarding the insert 9 there is positioned a membrane 90, arrangedas an outer layer all around the insert 9. Preferably, it is a copolyamide membrane 90that is elastic in all directions with high vapor permeability, having a meltingtemperature above 100 ° C, suitably up to l20° C, and a wash resistance of at least 60° C. Conveniently, the membrane is also completely fogging-free.

Next, the insert 9 at the back side 3 includes two layers 91A, 9lB of a heat resistantmaterial, preferably PAN/PES of about 120 to 200 g/mz.

Closest to the hand there is a liner 92, preferably including about 50 -70% Aramid and30-50% glass, of about 250 to 350 g/mz.

Moving to the palm side 2 preferably exactly the same layers are being used as for thebackside except for using merely one layer 91A of heat resistant material and that theouter shell includes a palm piece 20 that comprises a specific composite layer 20A and aspecific coating 20B in accordance with the invention. Hence, the insert 9 preferablyhas a larger amount of heat resistant material at the back side 3 than at the palm side 2.

Thanks to the invention there is achieved an extremely good grip ability by means ofusing the novel material M2 in the palm side 2 of the outer shell, e.g. for the pieces 20,60 at the palm side 2. There has surprisingly been identified that the grip ability whenusing the material in accordance to the invention is extremely much better than conventional non-leather materials, especially in wet conditions, as presented below.

GRIP ABILITY DRY WET Traditional glove using 5 5leather in palm side Traditional glove using 5 2coated textile in palm side Glove according to 5 5invention COMPLIANCY DRY WET Traditional glove using 4 5leather in palm side Traditional glove using 5 5coated textile in palmside Glove according to 5 5invention WASH ABILITY DRYTraditional glove using 3leather in palm sideTraditional glove using 4coated textile in palm sideGlove according to 5invention As noted above a glove according to the invention presents a surprising combination of desired properties for a flame retardant glove, for which there has been a long felt need.

The invention is not limited by the above shown but can be varied within the scope ofthe appended claims. Those skilled in the art will recognize, for example, that the exactdesign of various components may be varied in many ways. Thus, it is understood, forexample, that the glove also retains its basic functionality if having two or more of thefingers integrated to form a common space for two or more fingers, e. g. in the form of athumb glove.

One variant is, for example, to leave only the index finger and thumb free while thelittle finger, ring finger and middle finger are combined in a wide finger. Anothervariant is that only the little finger and ring finger 3 are integrated into one and the same space.

Furthermore, it is understood that materials indicated above With trademarks are onlyexamples of materials With suitable properties and that these can be exchanged for other kinds of materials With the same or similar properties.

Claims (15)

1. Flame retardant protective glove (1), preferably in the form of a finger glove, havingan outer shell comprising a palm side (2), a back side (3), an outer side (4) and a thumbside (5), wherein the material in the back side (3), outer side (4) and a thumb side (5)comprises at least one first multilayer material (M1, M3) comprising an outer layer(30A) of a flame retardant material and said palm side (2) comprises a secondmultilayer material (M2) different than said at least one first multilayer material (M1,M3), characterized in that said palm side (2) comprises at least one palm part (20) madeof said second multilayer material (M2) having an outer coated layer (20A) of a flameretardant material comprising Chlorosulfonated Polyethylene and a second layer (20B)including at least 80% aramide fibers, suitably para-aramide fibers, preferably at least90% aramide fibers and more preferred 100% aramide fibers, wherein said secondmultilayer material (M2) has a surfacic mass of between 400 to 1200 g/mz, preferably500 to 1000 g/mzand a thickness of between 0,5 to 1,5 mm, preferably 0,6 - 1 mm, and is resilient having an elongation at break (s) of at least 20% in all directions.

2. Flame retardant protective glove according to claim 1, characterized in that saidsecond multilayer material (M2) has a larger elongation at break (sp) in a length wisedirection (F) than the elongation at break (sw) in a width wise direction (W), Wherein preferably sp > 2 sw, more preferred sp = 3 - 6 Sw.

3. Flame retardant protective glove according to claim 1 or 2, characterized in that saidthe second multilayer material (M2) has its largest elongation at break (sp) in a lengthwise direction (F), whereas the first multilayer material (M1) has its largest elongation at break (aw) in a width wise direction (W).

4. Flameproof protective glove according to any of claims 1-3, characterized in that saidsecond multilayer material (M2) has a tensile strength (o) of at least 15 daN/5cm in all directions, Wherein preferably the tensile strength (op) in a length wise direction (F) islarger than the tensile strength (ow) in a width Wise direction (W), more preferred op >ow, and even more preferred op = 3 - 6 ow.

5. Flameproof protective glove according to any of claims 1-4, characterized in that saidpalm side (2) comprises at least one palm part (20) and at least one thumb piece part (61) made of said second multilayer material (M2).

6. Flameproof protective glove according to any of claims l-5, characterized in that saidat least one first multilayer material (Ml, M3) includes a first multilayer material (Ml)comprising a basic protective layer (30B) including aramide fibers, suitably para-aramide fibres, and other strong fíbres, e. g. polybenzimidazole fibres and a coatingcomprising silicone, Wherein the amount of aramide fibers is larger than the amount ofother strong fibres, e. g. polybenzimidazole fibers, preferably including 70-80% aramidefibres and 20-30% other strong fibres, e. g. polybenzimidazole fibres, Wherein more preferred the Weight of said first material (Ml) is in the range of 400 - 600 g/mz.

7. Flameproof protective glove according to claim 6, characterized in that at least a backside part (30) of the outer shell is made With said first multilayer material (Ml) andpreferably also a thumb piece part (61), Wherein more preferred also a cuff part (80) is made With said first multilayer material (Ml).

8. Flameproof protective glove according to any of claims 6 or 7, characterized in thatsaid outer shell includes a third multilayer material (M3) comprising around 50-70 %Polyamide fibers and 30-50% aramide fibers, suitably para-aramide fibers, preferablythe amount of Polyamide fibers is larger than the amount of aramide fibers, morepreferred the third multilayer material (M)3 has a surfacic mass of between 300 to 800g/mz, preferably 400 to 600 g/mz.

9. Flameproof protective glove according to claim 6, characterized in that at least aplurality of finger side part (70-73) of the outer shell is made With said third multilayermaterial (M3) and preferably also at least one hand side part (40, 50), and morepreferred also a thumb piece part (62).

10. Flameproof protective glove according to any proceeding claim, characterized inthat an insert (9) is arranged Within said outer shell, comprising at least one fire blockerlayer (9lA, 9lB) and at least one aramide fiber containing layer (92), suitably para- aramide.

11. Flame retardant protective glove according to claim 10, characterized in that said insert (9) has a larger amount of fire blocker material (9lA, 9lB) at the back side (3) than at the palm side (2).

12. Flame retardant protective glove according to claim 10 or 11, characterized in that a liquid-tight membrane layer (90), preferable breathable, is arranged in said insert (9).

13. Flameproof protective glove according to any proceeding claim, characterized in that said second multilayer material (M2) is in the form of an interlock knitted fabric.