FR2776168A1 - Supple and protective glove against pricks - Google Patents

Abstract

The flexible protective glove has a knitted fabric base, coated on the outer surface with a layer of an elastomer or plastics material. The glove fabric is knitted with floating stitches. The knitted glove fabric is preferably a warp knit, without sewing, in an assembly of microfibers. An Independent claim is included for a manufacturing process, where the glove fabric is knitted with floating stitches and without sewing, and placed on a shaper. The outer surface is coated with a precursor, which is heated for vulcanizing. Preferred Features: The fabric is produced on a warp knitter, with a twin needle bed, without sewing. The shaper, covered by the glove fabric, is given an initial immersion in the coating material in a bath of a coagulating solution, followed by a further immersion in a bath of natural or synthetic latex. The coated glove is washed and dried before heating while on the shaper.

Description

The subject of the present invention is flexible gloves for protection,

  new type, and a method of manufacturing said gloves and an intermediate product useful in said manufacture. Said flexible gloves are more comfortable, more elastic, more deformable than the gloves proposed to date for the same purposes. They ensure better gloving, very close to the hand and therefore transmit a better tactile sense ... The Applicant proposes in fact, in the context of the present invention, an improvement to the flexible gloves of

protection of the prior art.

  These gloves of the prior art, made of a knitted textile support coated on one side with an elastomer or a plastic material (so-called textile-supported gloves), have been marketed for many years, in particular by the

  Applicant. They are intended both for the general public and professionals.

  They are used to protect, in a waterproof way, the hands, as well

  housekeeping, gardening and industrial work

  The textile support of said gloves is in contact with the hand of the user while the layer of elastomeric or plastic material isolates said textile support, and therefore said hand, from the aggressive external medium Said layer thus provides, in a sealed manner, the protection sought . Said textile support confers on the whole

mechanical resistance...

  The manufacturing process of these flexible protective gloves according to the prior art generally includes the two main steps below: a first step of preparing the textile support in the appropriate form: that of a glove; a second step of coating said textile support, on its outer surface only, with a precursor material of the coating (elastomer or

plastic material).

  Said textile support must obviously be suitable for the implementation

of said single-sided coating.

  This coating can in particular be carried out by dipping: a form to be dipped is dressed with the textile support and is then dipped in

less an adequate bath ...

  In order to obtain the desired result, knitted textile supports - obtained directly on the knitting machine or cut-and-sewn type - are used according to the prior art. In this type of knitting, familiar to the skilled person, the meshes formed by the same thread belong to the same row. We also speak of knitting "weft." The machines for implementing this type of knitting are compact and of simple design.The flexible protective gloves of the prior art thus have a textile support of the type: knit to meshes picked (or knit "weft"). This is actually declined according to several variants, i.e. according to different types of armor such

  standard armor Jersey, Interlock, 1/1 rib, fleece ...

  The improvement proposed according to the invention to this type of gloves

  flexible protection, lies in the characteristics of said textile support.

  Surprisingly, the Applicant was able to manufacture textile-supported gloves according to a process of the type used according to the prior art, with textile supports of a new type, and said gloves supported.

  textile have proved, as indicated above, particularly effective.

  Said textile-supported gloves of the invention are thus gloves of the type of those of the prior art in that they are made of a knitted textile support coated on one side with an elastomer or a plastic material. They are however original by the exact nature of said textile support. Typically, said knitted textile support of the gloves of the invention is a knitted fabric.

stitches thrown.

  We speak of jerseys knit or knit "warp." In this type of knitting, the meshes formed by the same thread do not belong to the same row, the meshes formed from each warp are formed in the

meaning of the length of the knitting.

  This type of knitting is not new. What is new is its use in the context of flexible protective gloves ... The knit knit jerseys are obtained, conventionally, on chain looms, including Jacquard type. The said warp jobs are generally bulky machines that produce large prints of textile supports. To date, said textile fabrics discarded mesh are used in the preparation of dressings, curtains, nets or bags, for fruits and vegetables ... In the context of the present invention, it is therefore proposed to such textile media a new outlet. Knitted knitwear also exists in different weaves. Some of these armor are characterized by a large capacity to

the deformation.

  The gloves of the invention are therefore characterized in that their knitted textile support is a jersey knit discarded. According to a non-limitative variant, said knit textile knit fabric has a type of armor

  charmeuse. This type of armor is familiar to those skilled in the art.

  Said textile support of the gloves of the invention, whose armor is charmeuse type or otherwise, is advantageously a textile support, knitted stitched knit, seamless. The skilled person has already undoubtedly grasped the interest that there is to obtain, directly on a suitable machine, such a textile support: seamless. Said suitable machine is for example double chain type business

  needle bed. It allows you to knit an article in three dimensions, seamlessly.

  However, it should be noted here that the invention is in no way limited to this particularly advantageous variant and that said knitted mesh textile support

  throws can also be of the cut - and - sew type, obtained in several operations.

  As regards the constituent yarns of said discarded mesh textile support, it will already be understood that they must be suitable, in particular in terms of

  strength, for knitting on a warp trade.

  The Applicant has tested many son, natural material (cotton ...), artificial (viscose ...), synthetic (polyester, polypropylene, polyamide ...) or a mixture of these materials, the same type or not , consisting of spun yarns, fine strands or microfibres (fibers with a titre of less than 1 dtex) or even having a complex structure (covered yarns ...). It recommends, for the constitution of the textile support gloves of the invention: - in terms of son structure: the intervention of microfiber yarns; the constituent yarns of the knit textile knitted fabric support are therefore advantageously assemblies of microfibers; in terms of yarn nature: the intervention of polyamide and / or viscose and / or polypropylene and / or polyester yarns; the constituent yarns of the jute knitted textile support are therefore advantageously yarns of

  polyamide and / or viscose and / or polypropylene and / or polyester.

  In the context of a particularly advantageous variant, the constituent yarns of said textile support are yarns which result from an assembly of polyamide microfibers. Threads of this type, especially those marketed under the trademark Tactel micro by the company Du Pont De Nemours, are particularly preferred insofar as they give the gloves of the invention excellent comfort and the use of said gloves, excellent perception to the touch. As regards the coating of said original textile support of the gloves of the invention, it may quite well be a coating of the type of those which cover the knitted fabric knitted fabric supports of the prior art, namely in particular a polyvinylchloride, polyurethane or a natural rubber (such as isoprene) or synthetic rubber (for example of the SBR (styrene-butadiene rubber), NBR (acrylonitrile-butadiene rubber) or CR (polychloroprene) type) . According to the invention, therefore, flexible protective gloves of a new type are proposed which are particularly flexible. According to a preferred variant, said gloves of the invention consist of a textile support, without sewing, knitted in knitted stitches, coated with an elastomer or plastomer, in particular by

synthetic rubber.

  It is now proposed to describe a method of manufacturing said new gloves of the invention. Said method constitutes the second object of the present invention. Typically, it includes the coating of a knitted textile backing, with knit stitches. It comprises, more specifically: - the realization of a knitted textile support, with discarded stitches, of appropriate shape (that of a glove, to the desired size), preferably seamless; - The dressing of a shape adapted by said knitted textile support; at least one coating, advantageously by dipping, of said knitted textile support, mounted on said shape, with a precursor material of the desired coating; a heat treatment suitable for generating, in particular by vulcanization (context of the elastomers) or crosslinking (context of the

  plastomers) of said precursor material, said coating.

  Characteristically, for the manufacture of the gloves of the invention, is involved a knitted textile support discarded mesh. Said original textile support is involved in a process of the known type: that used for the

  manufacture of flexible protective gloves of the prior art.

  Said original textile support is obtained in the appropriate form (that of a glove) to undergo the subsequent steps of the process, mainly that of its coating (on its outer face only). Said knitted textile support, in the appropriate form, may be of the cut-and-sewn type or advantageously of the seamless type. The said knitted textile support in the form of a glove constitutes the product

  intermediate novel, another object of the present invention.

  In any case, the textile support is knitted on a warp loom,

  particularly jacquard type indémaillable.

  According to a first variant, a textile is knitted on said loom and then cut and sewn to form a glove. According to a second variant, by far preferred, the textile support is directly knitted, in the appropriate form, on a loom double chain needle: thus obtaining on the machine seamless gloves, which should then simply individualize. The development of knitwear, in three dimensions, on double warp looms, is not in itself innovative. It is here advocated for the first time as part of

  the development of textile supports knitted flexible gloves of protection ...

  Surprisingly, such knitted textile supports have

  could be coated and generate gloves with very interesting properties.

  For the implementation of such a coating, they are placed on a shape (which represents a hand). Their outer face is then ready for said coating. This can be implemented according to several variants, in particular by spraying or dipping. It is generally preferred to operate by dipping in a bath (liquid) which contains the precursor material of the desired coating (elastomer or plastic material). Conventionally, the coating step can be repeated several times, in baths of identical or different nature, so that a textile support coated with several layers or a layer is obtained.

relatively thick ...

  The coated form is then heat treated to obtain, from the layer (layers) coated (s), the expected coating. Said coated form is advantageously rinsed with water before undergoing said heat treatment. At the end of said rinsing, it is advantageously dried. Thus, it can undergo: - a first drying step, at relatively low temperature

(O <1000C);

  a second stage of thermal treatment proper at the appropriate vulcanization or crosslinking temperature (0> 100 ° C.);

  in a single oven or in two different ovens.

  The Applicant has verified that, with a knitted textile backing with dropped stitches, it is possible to control said two coating and heat treatment steps, mainly said coating step, in order to obtain the appropriate coating, on the external side only. of said knitted textile support. It strongly recommends, for obtaining a rubber or polyurethane coating, to carry out said coating step in at least two stages. It strongly recommends in fact to involve a sub-layer of coagulant so as to constitute a barrier to the precursor material involved. Thus, advantageously, the coating of the dressed form of the textile support comprises: a first quenching in a bath of coagulating solution (this type of solution is known per se, it is for example a hydroalcoholic solution of a calcium salt and / or an acid); - at least one second quenching in a natural latex bath (to obtain a coating of a natural rubber) or synthetic (to obtain a

  coating of a synthetic rubber or polyurethane).

  The intervention of such a coagulant underlayer is generally not necessary or advantageous when the textile support is coated with polyvinyl chloride. In this case, the coating of said textile support is generally limited to quenching in a polyvinyl chloride bath, or even to

a unique temper of this type.

  The invention is illustrated and more specifically its aspect by

the example below.

  The Applicant has prepared gloves of the invention by implementing, successively, the three main stages hereafter: - preparation of a suitable textile support, - coating of said textile support,

  - Proper treatment of said coated textile support.

  Each of said steps is now specified.

  1) Preparation of the knit textile knit fabric 1-1. Choice of the wire: the micro Tactel wire marketed by Du Pont de

  Nemours has been employed. It is a microfiber polyamide.

  1-2. Knitting: said yarn has been knitted, with the appropriate settings, to obtain a seamless support, on a warp (chain type double needle). Said profession is a device marketed by the firm Karl Mayer. At the end of said knitting, a seamless textile glove with knit

  jetties. This is the new intermediate product within the meaning of the invention.

  2) Coating of knit textile knitted fabric

  The coating is carried out by dipping.

  2-1. Dressing: the textile support is dressed on a shape adapted to its dimensions. In this example, this is the ULTRANE form of

MAPA company.

  2-2. Quenching in the coagulant: the form covered with the textile support is soaked in a bath of coagulating solution consisting of a mixture: * methanol 84% * acetic acid 15%

  * calcium nitrate 1% (% by weight).

  At the outlet of the bath, said form is drained for 30 seconds and

returned for 90 seconds.

  2-3. Quenching in the latex: the coated form of said solution

  The coagulant is then dipped in a bath of butadiene acrylonitrile latex.

  Said latex has the formula (in parts by weight): * latex Perbunan VT 100 * zinc oxide 5 * sulfur 1 * accelerator MBT Zn

  (zinc salt of mercaptobenzothiazole) 1.

  The form is soaked for 10 seconds in said latex bath. It is then removed from said bath and dried in rotation, at room temperature, during

seconds.

  3) Final treatment (washing and heat treatment) of the coated textile support The coated textile support, mounted on the shape, is then washed, by

  immersion in water, in a wash tank at 40 C, for 1 hour.

  It is then dried (always mounted on the form) in a ventilated oven,

 C, for 1 hour.

  It is finally heat-treated, in a ventilated oven, at 120 ° C, during

  minutes. This heat treatment ensures the vulcanization of the latex.

  We then obtain, in shape, a glove of the invention. It is

finally unmolded.

  This glove fits perfectly the hand. It is soft, soft and provides

a very satisfying tactile sense.

Claims (11)

  1. Flexible protective glove, made of a knitted textile support coated on one side with an elastomer or a plastic material, characterized in that said knitted textile support is a knitted mesh knit. Glove according to claim 1, characterized in that said support   knitted knit fabric has a charmeuse type armor.   Glove according to one of claims 1 or 2, characterized in that   said knit textile knit fabric is a seamless textile backing.   4. Glove according to any one of claims 1 to 3, characterized   the constituent yarns of said jerseys knitted textile support are microfiber assemblies.   Glove according to one of Claims 1 to 4, characterized in   the constituent yarns of said knit textile knit fabric are polyamide and / or viscose and / or polypropylene and / or polyester yarns and advantageously consist of yarns resulting from a microfiber assembly of polyamide.   Glove according to one of Claims 1 to 5, characterized in   said knit textile knit fabric is coated with polyvinyl chloride   vinyl, polyurethane or a natural or synthetic rubber.   7. A method of manufacturing a glove according to any one of   Claims 1 to 6, characterized in that it comprises:   - The production of a knitted textile support, with knitted stitches, of appropriate shape, advantageously without sewing, - the cladding of a shape adapted by said knitted textile support, - at least one coating, preferably by dipping, said textile support knitted, mounted on said shape, by a precursor material of the desired coating, - a heat treatment suitable for generating, in particular by   vulcanizing or cross-linking said precursor material, said coating.   8. Method according to claim 7, characterized in that said knitted textile support knit throw is a seamless textile support which has been knitted   on a craft double chain needle.   9. Method according to one of claims 7 or 8, characterized in that   the coating comprises a first quenching of the dressed form of the textile support in a bath of coagulating solution and at least a second quenching in a bath natural or synthetic latex.   10. Process according to any one of claims 7 to 9,   characterized in that said heat treatment is preceded by washing and drying the coated form. 11. Textile knitted textile support knit, advantageously seamless, having the shape of a glove, for the manufacture of a flexible glove of   protection according to any one of claims 1 to 6.