DE1410773A1 - Seamless plastic glove for medical use and dipping mold and process for its manufacture - Google Patents

Description

Seamless plastic glove for medical purposes, as well as dipping form and method for its production

The invention relates to moisture-impermeable plastic gloves for medical purposes.

An object of the invention is cheap, lightweight, ■ moisture-insensitive plastic gloves that are of such a nature that they maintain the tactile feeling to a high degree in the hands of the wearer.

Another object of the invention is to provide methods of making berries for the manufacture of gloves of the type mentioned which allow very economical production.

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Another object of the invention is to provide a dipping mold designed to be used with gloves can be produced that are equally well adapted to the right and left hand.

Furthermore, it is an object of the invention to provide a glove dipping mold which is constructed in such a way that that it can be used to make well-fitting, seamless, synthetic plastic gloves.

The invention then aims to produce plastic gloves and leek molds for them Manufacture that eliminates the problem of "blocking" i.e. the sticking together of parts of the glove surfaces, is overcome.

The novel seamless plastic glove according to the invention is characterized in that it consists of a plasticizer containing polyvinyl chloride in which Evenly distributed polyvinyl chloride particles with a diameter larger than the mean pilm thickness uirL the outer glove surface are everywhere is finely roughened. The new glove is ambidextrous portable and consists in a known manner

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a metacarpal receiving part and thumb and finger parts that are laterally spaced from each other protrude from the metacarpus. What is new is that the longitudinal axes of the fingers and finger cots that receive the thumbs are generally arranged in parallel and are practically in a common plane Represents the plane of symmetry of the glove.

According to the invention, the process for its production consists in that the plastic film is applied to a glove shape is applied by dipping the mold in a plastisol, which has a larger proportion of contains relatively coarse polyvinyl chloride particles, and that you can melt the plastisol on the mold the particles are heated in a plastic film, which contains particles larger in diameter than the mean film thickness.

The dipping mold for the production of the gloves described above is characterized according to the invention in that the longitudinal axes of the finger and thumb parts are generally parallel and practically in a common plane and that the finger and thumb parts have a horizontally elongated cross-section, the greater dimension of which is arranged perpendicular to the common plane.

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The above and other purposes of the invention will become more apparent from the following description with reference to the accompanying drawing. In this one is:

Pig. Fig. 1 is a general perspective view of a glove incorporating a Thumbnail and. has two finger cots and in which the invention is presented, and partially is cut out,

Figure 2 is a plan view of a dipping mold for making the Pig glove. 1,

Pig. 3 and 4 are general perspective views showing modifications of the Porm design;

Pig. Figure 5 is a greatly enlarged, fragmentary, schematic cross-section of the glove film and the surface of the porm,

Pig. 6 is a perspective view of another leek shape,

Pig. 7 an elevation of a dip form for a five- " fingery glove,

Pig. 8th

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Pig. 8 an elevation of a five-finger glove that fits both hands,

Pig. Figure 9 is a perspective view of another type of dipping mold for making one for both Hands matching glove like he did in Pig. 8 is shown

Pig.10 a section on the line 10-10 of Pig.9 and

Pig. 11 a section on the line 11-11 of Pig. 9.

One glove form in which this invention is embodied is shown at 10 in Pig. 1 generally shown. The glove shown is seamless, contains three pingers, namely a thumbling 11, a first or index fingerling 12, a second pingerling 15! and a shirt or metacarpus rope 15. The glove is made of a flexible I-film of fused, plasticized resin that has a roughened or matted outer surface , as shown generally at 17, and a relatively coarse, generally uneven inner surface , shown generally at 18, with a mean pilm diameter that is between 1/1000

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and can be 10/1000 inches. For surgical and similar purposes, a PiIm turned out to be by about

2 - 5/1000 inches thick as appropriate. The ratio of the outer dimension of the free side of the shirt part the distance between this side and the base of the finger cots 11-12-13 is preferably between

3 and 5: 1. In the illustration this ratio is approximately 4> 6: 1. The outer surface of the glove is preferably provided with an annular rib 16, which is at a small distance from the free Side of the shirt.

Plasticized polyvinyl chloride resin is used as the glove material preferred, but other types of flexible plastics can also be used.

In general, the handshoe is made by applying a thin coating of a suitable liquid solution, dispersion or latex to a mold or compression mold, fusing, drying or curing it and then turning the handshoe out of the

form or mold is pulled out.

To the handshoe production according to the invention. . travel

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driving involves the use of leek molds, like
they are shown generally at 20. The form is there
made of a suitable material such as aluminum sheet from
about 1/8 inch thick showing a gate 21
to be able to attach the shape to the usual lauching devices and corresponds beyond a normal one!

Immersion line 22 of the shape of the generally i

i shown glove. This special form contains' the components 23 , 24 and 25, which in a common. seed level with a component 26 lie. the
Components 23, 24 and 25 form the three finger cots 11, 12 and 13, and component 26 represents the shirt 15. The sides 28 of the mold are carefully rounded and a recess 27 is in the
Near the immersion line 22 is provided to the tape

16 to form on the glove shirt. The coplanar - ,,

Relationship of the fingers and the metacarpal part lie *!

ί make a mold for making two-handed:

shoes as shown in FIG. ^!

i To place a. ·,. on the outer surface of the glove. j

To produce matted surface 17, the upper!

surface of shape 20 first polished and then through J

caustic etching, steam blasting, anodic etching i

or by a combination of these or by other j

suitable processes that do not

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degree of unity that daduroh porous places and a low strength of the cast film arise, roughened. Duroh this procedure remains the surface is even but matted, i.e. its metallic sheen or smoothness is removed. If the Form 20 is made of aluminum, a satisfactory etching can be achieved by immersion for about 15 minutes of the polished shape in a 5 # solution of sodium hydroxide. The etched or otherwise fine The roughened surface of the mold is shown schematically at 29 in FIG.

The mold 20 is then in a COg-free plastisol of low viscosity, the polyvinyl chloride in any of the known to this ! Purpose used plasticizer is dispersed. For gloves that are intended for clinical use j are, should, the emollient through the nutritional and

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Drug administration recognized as non-toxic I. The viscosity of the plastisol should be about 1,200 op ^{at 20 0 O.} or less in order to keep the draining time as short as possible for economic reasons, but with an increase in the draining time, a higher viscosity of up to about 3,000 cp. be used. Using plastisol is sure to get the one you want

rough j

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rough irregular inner overall surface 18 of the glove, considering the size of a smaller rope of the granular resin particles in the dispersion so chooses that the particle diameter is greater than the average thickness of the glove forming Films is. When the plastisol is poured into the mold to about 2 - 3/1000 inches of medium filra thickness and is to be fused, the greater part of the dispersed resin particles should be about the same or smaller diameter, and a certain smaller percentage of the particles about 5/1000 of an inch Have a diameter, whereby the amount and distribution should be sufficient to cover the rough, irregular surface 18 to deliver. One for the purpose of the invention suitable plastisol is commercially available under the designation RESLAC 2336-360 from Borden & Co. . Chemical Division.

In one method of practicing the invention, the mold 20 is immersed in the plastisol to the depth generally indicated by line 22 which represents the desired boundary of the shirt of the finished glove, then removed from the plastisol, and allowed to drain until until a plastisol filra of the desired thickness remains on the mold. The thus-coated mold is then heated 3-4 minutes at a temperature of about 45O ⁰ F to the dispersed resin of the plastisol to

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melt and at the same time bring about the incorporation of the softening dispersion medium in the resin. The mold is then cooled to about 100 ° F to allow the glove to slip out of the mold . enable. Of course, if desired, lower or higher melting temperatures can also be used, with correspondingly longer or shorter heating times. Since the surface roughness 29 of the mold is very fine and not sufficient to allow the plasticized resin to flow into the surface depressions of the mold to a greater extent, the larger resin particles fuse and give the outer surface of the film on the mold a relatively coarse overall characteristic roughness, such as is shown schematically at 18 in FIG. As previously noted, when the glove is stripped from the mold, the glove is inverted so that the outer surface 18 of the film on the mold becomes the inner surface of the glove and the surface 17 that was poured onto the etched surface of the mold to the outside surface of the handsohuh. This arrangement of the surfaces is preferably retained when the glove is used.

In carrying out the method described above is provided with the coating shape after · sent dipped into the plastisol and drained

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is heated to fuse the plastisol. This heating step can be accomplished in any suitable manner such as by brewing the mold in a heated atmosphere or by it is immersed in a heated liquid molten medium.

If the plastisol is melted in a heated atmosphere, such as in an oven, the mold should preferably be a good conductor of heat, such as aluminum, etc. However, the gloves are made by a process in which the melting is carried out in a liquid medium so this requirement loses its meaning * and it is preferable in reality, 'make the shape of a material that is a relatively poor conductor of heat, bo as £ remains during fusion on a proportionate \ moderately low temperature. As a result, the glove can be stripped from the mold without waiting for it to cool, as described above.

Besides shortening the time it takes until the finished gloves are stripped from the mold

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fusing of the plastisol by immersion in a heating fluid also allows one Reduces the time required to fuse the resin and "causes a substantial increase." the number of gloves that can be produced with a given shape. The shortening the fusion time results from the better thermal conductivity of the heating fluid compared to a Heating in air, which is a poor heat transfer medium. Because the merger speed is directly proportional to the temperature, the temperature must be when the fusion is heated in Air running, must be limited in order to prevent undesired evaporation of the plasticizer. When the glove is heated in a dry atmosphere without affecting the temperature and time are carefully controlled, evaporation of the plasticizer occurs, especially at the fingertips of the glove and these parts of the film can become brittle.

Fusion by immersion in a suitable liquid, on the other hand, eliminates the problem of evaporation of the plasticizer and allows a marked reduction in the fusion time. One and only

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The limiting factor for the temperature of the liquid results from the effect of heat do not exceed the thermal stability of the resin allowed.

The fusing medium can be any suitable liquid that is suitable for the softener and resin of the Plastisols are not a solvent and their boiling point is best not lower than that Fusion temperature of the plastisol. It is also desirable that the liquid be quick drips or evaporates from the surface of the glove without leaving an undesirable residue, so that the glove can be stripped from the mold and packaged without further treatment. aside from that it may be desirable to choose a liquid that is water soluble so that it can be used if necessary easily removed from the surface of the glove

can be washed. If necessary, the drying of the glove on the mold can be accelerated by directing a stream of air onto the mold or by removing excess liquid from the Surface of the glove is taken up with a suitable absorbent material.

The following liquids were found to be suitable

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for use in fusing a plastisol of polyvinyl chloride: ethylene glycol, diethylene glycol, ; Triethylene glycol and glycerin. Appropriate to the other Substances that can be used to fuse the plastisol include melted ones Mixtures of salts or molten metals.

When using glycols of the type described above, a temperature in the range of 350-4-0O ⁰ J? as suitable for rapid fusion of the plastisol. In this area, the mold does not need any dwell time in the liquid. The mold that bears the plastisol film only has to be immersed in the liquid and immediately removed from it. Therefore, a mold made of a non-conductive material is not heated to a greater extent than is the case when the fusing is carried out in a furnace using a metal mold. This gives a significant advantage to immersion fusion, as the mold can be used again immediately without any major delay. !

For certain purposes, the shape and proportion of the gloves shown in Fig. 1 as well as the buffing

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the inner and outer surfaces of the glove significant advantages. In this form of the invention, the length of the glove is preferably chosen so that that it reaches to the wrist of the wearer. From the Pig. 1 and 2 shows that the finger cots 11, 12 and 13 are proportionately different from the tips to the base of the pingers expand greatly, and this expansion is continued until the end of the shirt 15. the end This construction results in a proportionate way loosely wrinkled seat, leaving space to accommodate the metacarpus and the fourth and fifth Pingers, which are pressed lightly against the palm of the hand and a gentle movement of the hand into the Glove permitted, the Ds.u'iiim imcJ being the arste and second pingers come into their real pinger linga « This loose fit and in particular the strong expansion of the hemate part also allow easy Removal of the glove after use - a < or two dangling fingers ?, the hand and wrist are usually sufficient to hold the glove without under * support with the other hand. In this way the glove can be put directly into a suitable one Containers are placed for disposal. This is a major hygienic benefit, especially when the glove has been used for physical testing or surgical purposes. In each

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Pall can put the shirt part bo outwards over the fingers and the glove is removed without any contamination will.

The properties of the inner and described above

outer surface of the glove results in gloves that are j compared to those made of thicker fabrics

are made or have smooth or shiny surfaces, have a very good sense of touch.

The roughening 18 on the inner surface of the glove makes this similar to the skin on the fingertips and when the gloved pinger against a:

are pressed to be tested against a surface or object to be picked, so the thin Piim of the glove can be a result of the interacting roughness or toothing on the intermediate [Pilmteilchen surface of the pinger and with respect to the pinger not move. At the same time, the roughness 17 on the outer surface prevents the outer glove surface from sliding over the surface in contact.

In contrast to gloves, which are made of an elastic material such as rubber, where you can sit in a high position Relies on a stretched, tight fit in order to achieve a sense of touch, the local

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bordered, non-slipping contact through the thin, flexible PiIm, which is relatively loose on the Hand sits, and what the glove of the invention is characterized, the desired tactile feeling and is at the same time an important factor in the overall hygienic and economic processes of a to secure an object intended for single use.

In addition to this puncture of the roughened glove surface described, such a surface prevents also the undesirable tendency known as "blooken" the pilm surfaces during packaging and storage The gloves are glued together and there is no need for talc or other treatments suitable substances to prevent blocking. The kind described, the roughening of the surfaces also reduces the propensity for education from tiny holes in the cast PiIm very strong. The gloves can be used before or after packing sterilized using steam, chemical or other suitable sterilization methods.

The tape 16 slightly increases the stiffness near the end of the shirt portion, thereby making it easier to undress the glove is relieved by removing it,

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has been described above. However, it can be omitted if it also has advantages.

Without the desired width and length of the glove shirt and the resulting wrinkled fit If desired, the shirt portion of the glove can be given a bent end, thereby sacrificing Glove material and weight are saved by bending the shape around one or more axes is inclined in a direction to the plane of the mold to the depth of immersion of the side parts of the Decrease shape. For this purpose, the shape can be bent into an S or trough shape, as in FIGS. 3 and 4 for example is shown.

In Pig. Another type of mold is shown in Figure 6 by which a glove can be made that more closely approximates the hand shape. V / ie Pig. 6 shows the shape, which may be solid or hollow in cross-section, consists of a dome-shaped main portion 30 which includes a portion 32 on which the shirt portion of the glove "is formed and from which tapered generally cylindrical finger cots 33, 34 and 35 extend and wherein all parts are dimensioned so that they provide a glove as described above in general, proportioned. the

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Surface of the shape of Figure 6 is etched or otherwise finely roughened as indicated "at 36" in the manner and for the purposes as described above and the plastisol or another material can be brought onto it by dipping, spraying, or pouring on. Form of Fig. 6 has the gate part that they are around their j

the central axis indicated at A can be rotated, ■ by the removal of excess material through j a combination of gravity and centrifugal forces will accelerate 25U. |

Although the three-fingered glove of Fig. 1 from the Is preferable for reasons described above, the invention can also be applied to a glove -j the one who has more or less finger cots »'!

A dip molding for the production of _gloves: all of the fingerstalls, and in which the invention is illustrated, is shown at 38 in FIG.

Pig. 8 shows a five-fingered glove 40 which has a more or less shaped, possesses the metacarpal receiving part. The glove is seamless, as described above, and has everywhere a finely roughened or matted exterior

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surface 17 and a coarsely roughened inner surface 18, with the same properties as above described. The glove 40 is placed on a saucepan 42 as shown in Figs. 9 and 10 is prepared.

The dipping mold 42 can be made of any suitable material, such as cast aluminum, porcelain or epoxy resin. The surface of the mold is finely • rough by any suitable method appropriate for the material chosen to make the mold is like! caustic etching, steam jet or

Sandblasting, anodizing, etc.

Palls the fusion of the plastisol in one-heated Atmosphere, such as in an oven, it is important that the mold has a good heat- ■ is a conductor and in these circumstances aluminum would be the preferred material. However, how

explained above, the fusion of the plastisol in executed a liquid medium, bo the shape is preferably made of a material such as porcelain or filled epoxy resin, 'which are poor conductors of heat.

The shape 42 shown in Figures 9 and 10

■ i ■ contains

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includes a metacarpal portion 44, the finger-forming ! hurry 46 and a thumb-forming rope 4β, which consist of protrude from the metacarpus. The metacarpal, finger and thumb parts of the form are all in one

I arranged on the common plane, indicated in Fig. 10 with a j '

and which is the plane of symmetry of the form ' represents. j

The fingers and thumb of the mold have a horizontally elongated cross-section, the larger dimension b of which is generally perpendicular to plane a. The edge of the fingers and thumb is roughly equal to the edge of the fingers of the human hand for which the glove is intended. The distance c between the fingers of the mold is also approximately equal to the corresponding dimension of the human hand and is curved as shown at '50 in FIG. The finger gaps have to be roughly right in order to produce a properly fitting glove. Although the distances between the ears and the external dimensions of the fingers are approximately the same as those of the human hand, the arrangement of the fingers and the thumb of the form is such that their total width w is not greater than the width of the palm part of the Shape. With this construction, the glove can easily be stripped of its shape, even if the glove material is not very streok-bar .

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By this arrangement, a single immersion provides a fit glove that is the same for both hands Fits well on every hand and has substantial reductions the mold costs.

Although a plastisol is the preferred form of material for simplicity, cost and ease of handling, the glove can be similarly cast or dipped from solutions or latex-type insoles of biyvinyl chloride or other suitable resins. In these cases, the resin and plasticizers may be dissolved in a common solvent or dispersed in water as a common dispersant. In addition, polymerizable liquid resins such as polyurethane and the like can be used in the practice of the invention. Since the roughening of the inner glove surface it can not be easily caused by variations in the resin particle size, it can be achieved in that u in the solution or latex particles of an inert, insoluble, granular material such as sand, pumice, in the heat-hardening resin . Ä., Are dispersed, wherein the Üeilohen size exceeds the desired pilm thickness. Such inert granules can also be used in the plastisols in place of the oversized resin

particles

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particles be dispersed.

The polyurethanes that are suitable for the production of gloves according to the invention include polyurethane elastomers, in the form of $ 100 reactive i capable liquids are available, and that through heating, exposure to moist air, addition of Curing agents or combinations of these methods to form a flexible film. An example of such a polyurethane is Adiprene: L-100 manufactured by Du Pont. Because polyurethanes are adhesive-like Have properties, a suitable release agent can be added to the liquid resin or to the Dipping form brought v / ground to an easy stripping of the hardened resin from the mold. Instead, a leek form can be used, which has a surface made of Teflon or a silicon polymer. To adjust the viscosity you can volatile diluents can be added. It is true that polyurethane elastomers take quite a long time Cure time, but they have superior toughness and abrasion resistance.

Claims

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Claims (6)

Claims 1. Seamless glove made of a plastic film for medical purposes, characterized in that it consists of a plasticized polyvinyl chloride, in the polyvinyl chloride particle having a larger diameter than the average film thickness are evenly distributed and the outer glove surface is fine everywhere is roughened. 2. The method for producing the glove according to claim 1, characterized in that the plastic film on a Glove mold is applied by dipping the mold in a plastisol, which has a larger proportion of contains relatively coarse polyvinyl chloride particles, and heating the plastisol on the mold to melt the particles into a plastic film, which particles with a larger diameter than the middle film dioke contains. 3 · The method according to claim 2, characterized in that the heating of the plastic film by immersing the j liquid-coated form in one on one to solidify supply of the plastic sufficient temperature heated · <■ liquid medium is carried out, which no solvent action on the constituents of the Kunststoffilmßausübt. · ..? New documents (Article 7 section 1 para 2N-- · «■ <■ π r ..: ι, -, _{nqir, v} 04/09/1957 909804/0006.. 4 · Dipping mold for carrying out the method according to one of the preceding claims> wherein the entire surface of the mold is matted and suitable for casting "ambidextrous gloves, and has a rope forming the metacarpus and fingers and thumbs forming ropes that are spaced laterally extend out of the metacarpus from one another, characterized in that the longitudinal axes of the finger and thumb parts are generally parallel and practically in a common plane and that the finger and thumb parts have a horizontally elongated cross-section, the larger dimension of which is perpendicular to the common plane is. 5. Ambidextrous plastic glove, one Π has the metacarpal receiving part and finger and thumb receiving finger cots which protrude at a lateral distance from each other from the metacarpal receiving part, characterized in that the longitudinal axes of the finger and thumb receiving finger cot are generally parallel and practically in a common plane which represents the symmetry plane of the glove , 6. Casting mold for gloves with a rope forming the metacarpus and extending therefrom, in a lateral direction distance I Ö09804 / 0006. i .26-141077a Finger and thumb parts located at a distance, characterized in that that the longitudinal axes of the finger and thumb parts run approximately parallel and practically in one common Plane, which is the plane of symmetry of the glove forms, and that the finger and thumb parts one have elongated cross-section, the larger dimension of which runs approximately transversely to this plane of symmetry. 909804/0006