WO2016099303A1

WO2016099303A1 - A method of forming gloves providing insulation from electricity from the latex and latex gloves electro obtained by this method.

Info

Publication number: WO2016099303A1
Application number: PCT/PL2014/000146
Authority: WO
Inventors: Urszula BORKOWSKA; Monika MALESA; Jan MICHALAK; Włodzimierz PIŁACIŃSKI; Janusz ROSLON
Original assignee: Secura B.C. Sp. Z O.O.
Priority date: 2014-12-19
Filing date: 2014-12-23
Publication date: 2016-06-23
Also published as: PL410671A1

Abstract

The present invention relates to a method of forming gloves providing insulation from electricity from the latex and latex gloves Electro obtained by this method. A method of forming electrical insulation of latex gloves from the latex, the latex includes forming, immersing the single vertical fingers down and formation of the glove, and the transfer mould formed on the surface of the layer of latex for further processing.

Description

A method of forming gloves providing insulation from electricity from the latex and latex gloves Electro obtained by this method.

Description

FIELD OF INVENTION

The present invention relates to a method of forming latex gloves providing insulation from electricity and latex gloves providing insulation from electricity wherein said gloves are obtained by this method.

BACKGROUND OF INVENTION

Rubber products are formed from latex compositions, which are aqueous emulsions of various types of additives such as sulfur, vulcanization accelerators, vulcanization activators, antiaging additives, dyes, etc. The molded product is subjected to drying and vulcanizing (curing), during which a chemical cross-linking process occurs and the fixation of the final product shape. The formation of products with complex shapes just like a glove with the fingers and the thumb is very difficult. The level of difficulty of production depends on the size of the mould and the thickness of the glove. The form should be immersed in a mixture for longer time, moreover the content, concentrations and rheological properties of latex composition differ. When removing the mould from the latex mixture, different parts of the form have been immersed in mixture for different time which results in the formation of different thicknesses of the layers in a glove. Furthermore, the process of dipping the mould may cause the entrainment of air bubbles, which then form a fault. Other difficulties emerging technology that forms stains soaking liquid residues forming the latex unsightly infiltration, while changing the electrical properties, in particular the fingers of the glove and the possibility of formation of membranous connection between adjacent fingers to bursting or tearing to form a local irregularities on the surface of the article. Latex compound itself is not homogeneous and its rheological properties can evolve during the production cycle. In the prior art different latex compositions, for example those described in patents GB 161 721 , KR20030020998, GB846290, for use in forming articles by dipping.

In the patent GB 161844 presents a blend of latex gloves, and a method of preparing elektoizolacyjnych natural rubber latex comprising immersing the metal mould in latex compound, which includes natural rubber latex in an amount of 100 parts by weight dry rubber, a non-ionic stabilizer such as an aromatic polyether glycol, or a condensation product of ethylene oxide with alkylphenols in an amount of 0.1 - 0.6 parts by weight, a crosslinking agent such as sulfur in an amount of 0.5 to 1.5 parts by weight, the vulcanization accelerator such as zinc or dwuetylodwuiiokarbamiman etylofenylodwutiokarbamiman zinc in an amount of 0.2 - 0 8 parts by weight of vulcanization activator, - zinc oxide in an amount of 1.0 - 2.0 parts by weight, 40% aqueous formaldehyde solution, the coagulant substance from the group of polyorganosiloxanes or polyvinyl methyl ether in an amount of 0.5 - 2.5 parts by weight, drying the gel applied latex, zwulkanizowaniu, pictured with the glove mould, washing out the ingredients that reduce electrical insulating properties and re thorough drying glove. The essence of this method are the steps of pre-heated to a temperature of 40°C - 80°C metal mould in which the stick is complete, spaced apart, and the wall thickness of the hand portion and the cuff is differentiated once immersed in the latex compound labeled with a viscosity of Ford cup with a diameter of 4 mm 16 to 20 seconds pH 7.6 - 9.2 for 5 - 60 seconds, then placed in a metal mould with the wet gel coated whose consistency decreases from the metal mould to the outer surface of the gel, in an aqueous wash liquor from continuous flow having a temperature of 18°C - 28°C for at least 30 minutes, removed the metal mould with a gel latex washed out and placed at 70°C for 1 - 3 hours and then vulcanized in hot air at 100°C - 140°C for 10 - 30 minutes, and after removing the glove from the metal mould product is washed in water at 18°C -28 C for 1-4 hours and then dried in air heated to a temperature of 80°C for at least 2 hours.

The application P.312038 described thin-walled rubber article with a high tear strength, prepared by dipping, which consists of a polymer blend comprising 10-75% by weight of a triblock copolymer of styrene-isoprene-styrene (SIS) 1 -90% by weight of a styrene triblock copolymer butadiene-styrene (SBS) and 0-25% by weight of a triblock copolymer of styrene-olefin-styrene (SOS).

In the description of latex gloves CN101822432 describes Electro and process for their preparation. The gloves are cured whole. The method comprises preparing a mixture consisting of 90-96% natural rubber, a vulcanizing agent, accelerating PC ZDC accelerating agent, a plasticizer Y, zinc oxide, anti-DNP and DOP, stabilizers, water, which were mixed to form a plastic material, and then prepared coagulant including calcium chloride, leveling agent, detergent and water, the ingredients are mixed thoroughly. The form of the glove is immersed in a coagulant solution, and then heated and dried. This is followed by vulcanizing and aging.

In the description of JP2006257610 shows how the production of compositions for the production of gloves to protect against static electricity. This method comprises the addition of natural rubber latex to 10% or more of acrylonitrile-butadiene derivative of the latex derivative, known as NBR latex. This appendix provides adequate resistance to static electricity gloves.

US Patent No. US2128827 discloses the formation of rubber products (gloves, fingers) by immersing the mould and then rotating and tilting it to a desired constant thickness. In U.S. Patent No. 3530825, describes the rotation of the coated article relative to both axes by an angle of at least 30°(preferably 90°) relative to each other. In U.S. Patent No. 4047251 stressed that since many years in the formation of surgical gloves and gloves for household uses the steps of immersion made of porcelain or aluminum mould with a smooth surface, a latex coagulant solution (usually a solution of calcium nitrate in alcohol), drying the coagulate the latex, then immersing the mould in the latex compound. After application of the latex layer on the mould, the mould is normally rotated for a period of time necessary for the reaction of the latex with the coagulant and form a gel layer. Rotation of the mould leveled an entire layer of wet latex and provides a more uniform thickness across the glove.

WO 1989/004647 described in Example 2 forming the glove by dipping into the latex and rotation.

Similarly, in the embodiments described in the documents WO94/20574 and W096/23428, indicated that the form of the exits from the bath in latex moving conductor mild type movements, in order to evenly disperse latex to form.

The document EP0561651 describes a process for the manufacture of gloves. This process also includes the step of dipping the mould into a tank of coagulant, and after removing the mould from the container to subject the coagulant solution further manipulated, including rotated 180 degrees to a vertical position, to evenly distribute the coagulant. The mould is then immersed in a tank of the latex and is then subjected to rotation to a horizontal position or otherwise in order to evenly disperse the latex on the mould, while the coagulant affects the latex to form a gel layer.

The subject of the document No. US5438709 a slip glove and a method for its preparation. In the production of moulds are often rotated 80°up to invert the mould. U.S. niskomodutowe WO2012099853 describes elastomeric compositions and articles made from these compositions. In Example 1 , indicated that its form after removal from the solution slowly allowed to dry for approximately 3 minutes with the rotation. WO2009061311 relates to methods and compositions for reducing the protein content and odor of rubber latex. In the description mentioned rotating mould in the manufacture of products due to immersion. Then, it is indicated that the moulds are automatically removed from the bath in koagulancie a rate of 1 inch per second, and rotated by an angle of from about 70 to 90 degrees, moving axially rotating the mould for about 90 seconds, using a conventional tumble dryer to dry coagulant on the surface of ceramic moulds.

In Example 3 in the document WO2009032636 illustrating the production of gloves with a dipping apparatus is also indicated in the form of a glove of rotation of 360°in the xy plane at a speed of 10 revolutions per minute, and the axis at a speed of 15 revolutions per minute for about four minutes to provide solutions solution evenly distributed over the spindle.

In US20040091504 describes elastomeric articles and methods for their production. As described most machines are designed so that immediately began rotating the mould at an angle of 90 to 180°along an axis parallel to the length of the mould before carrying out vulcanization of the product into the oven.

The present application published under number WO2003057444 are colored multilayer coated polymer articles and processes for their preparation. In the embodiments described in this document, as indicated by directional arrows in Fig. 5, each mould (80) is adapted to rotate around a vertical axis Y which is perpendicular to the floor thus form when immersed can be rotated.

The document US6344 63 describes a method and apparatus for forming gloves made from PVC. In forming products, the longitudinal form are mounted on an endless conveyor, and then gradually dipped into the vinyl plastisol while the mould is rotated at low speed (20-30 rpm) about its longitudinal axis. Then, the moulds are removed from the plastisol, and subjected to rapid centrifugation (1 ,000-1 ,200 rpm) about its longitudinal axis to remove excess plastisol.

The above-described methods of forming the glove present in multiple steps by applying successive layers of reagents. However, none of the aforementioned documents does not provide a method for producing gloves by immersion, in a single draft, which characterize a smooth form, repetition and the formation of the desired properties of electric insulation.

This is due to the complexity of the operations of forming a glove, which translates into a large proportion of defective products, shortages. In order to eliminate them, the work in the context of industrial research to develop effective ways of forming latex-free gloves electro-mentioned drawbacks. Forming of work performed on a robot, which is immersed in a liquid form of latex compound developed by following the sequence of movements and maintaining the form properly immersed in a mixture of latex for an appropriate time. Furthermore, after removal from the latex still wet article surface is exposed to the air stream at the appropriate temperature, led corresponding guide so as to provide a uniform distribution of the residual liquid mixtures without the formation of streaks on the surface. The last element of the invention proved to add a surfactant composition, which modifies the liquidity of the latex to be melted uniformly formed on the surface of the glove. Work on eliminating defects occuring among far-molded durable gloves for the last 6 years (2006-2012). Analyzed as a change to the program soaking forms translates to eliminate the type of defect. The result of this work was to develop an optimal manner of soaking glove, gloves receiving providing a uniform thickness over the entire surface, with no stains and no air bubbles imprisoned in the structure of the rubber. Industrial robot performing the work soaking mould latex gloves while working in the mix of developed algorithm provides repeatable steps to eliminate product defects enabled. SUMMARY OF THE INVENTION

The present invention relates to a method of forming electrically insulating latex gloves from the latex, wherein the latex mixture is prepared in a vat while maintaining mild agitation and stabilizing the temperature at 28°C, the latex compound, using a robot, are submerged vertically, fingers down the speed of 5 cm/s form of electro glove before the hot temperature 64-79°C, wherein the mould before immersion was coated with a thin layer of silicone oil dispensed from a pressurized container when the mould is submerged in the ladle stops the circulation pump the mixture, maintained the form of the the mixture from 16 s to 390 s, after which the mould is removed from the latex while maintaining the form of vertically downwards with the fingers, and after emerging from the latex coated form of a gelled mixture of revolutions performed by setting the form of fingers up and down the fingers, then passes mould is formed on its surface with a layer of latex for further processing.

Preferably, the form is introduced into the vat intermittent movement. In a preferred embodiment the mould is maintained in the mixture of from 90 s to 125 s, preferably from 110 s to 120 s.

In a preferred embodiment of the present invention, the latex compound comprises a surfactant in an amount of 0.1-0.2% by weight consisting of a mixture of at least three ingredients, surfactants, wherein at least one component having an HLB> 7, one with HLB <4 and the having an HLB in the range of 9-12.

Preferably, the latex compound comprises a surfactant in an amount of 0.15% by weight of a mixture consisting of PEG-100 stearate, sorbitan tristearate and olivate, PEG-7, respectively in the proportions of 3: 3: 4.

In another embodiment, the latex compound used in the present invention preferably contains a surfactant in an amount of 0.17% by weight consisting of a mixture of four surfactant ingredients : sorbitan laurate, PEG-80 sorbitan tristearate, glyceryl stearate and PEG-glycerol cocoate 7 with respect by weight of 3: 2: 1 : 4.

In yet another embodiment, the latex compound comprises a surfactant in an amount of 0.17% by weight consisting of a mixture of five surfactant ingredients : sorbitan laurate, PEG-80 sorbitan tristearate, glyceryl stearate, PEG-8 and cocoate oleinan PEG-7 glyceryl relative by weight of 3: 1 : 1 : 1 : 4.

In a preferred embodiment of the present invention, after slipping the fingers of the latex, the still uncoagulated the mixture on the surface of the mould begins execution cycle of movements form.

Preferably, after slipping the fingers of the latex, the coagulated mixture on the surface of the mould begins execution cycle of movements form.

In one embodiment, the mould is removed from the latex after the completion of coagulation of the latex layer at a speed of 3.5 cm/s after emerging from the latex coated form of a gelled mixture of gentle movements performed for 1 seconds.

Preferably, also rises up form fingers and then the fingers down cycle lasting 3 seconds and the mould is maintained in motion for 13 seconds.

Preferably rotates along its axis form doing turns 90°to the right and to the left at a frequency of 0.7 Hz and at the same time lifts the mould fingers up and then your fingers down cycle lasting 3 seconds, the mould is kept in motion by 13 seconds.

In another embodiment, the mould is removed from the latex at a speed of 4.5 cm/sec while maintaining the mould vertically downwards with the fingers.

Preferably, immediately after removing the mould from the latex on all four interdigital spaces pass air humidity of 95% and a temperature of 30°C.

In a preferred embodiment, the amount of air to the respective nozzles provide the linear speed of 1.4 m/s. Preferably, the blowing slit width is 2 mm. In a preferred embodiment of the present invention, the blowing phase is carried out by air jets for 10 sec, and then the valve is cut off the air supply to the nozzles. Preferably, the mould is kept in motion after the removal from the latex for 15 seconds.

The present invention also Electro latex gloves of the invention. The resulting gloves method described herein differ from those obtained by methods known in the art have exceptionally equal smooth form, with no signs of air bubbles or foam bubbles, in addition to the fingertips do not appear infiltration, craters or bead. It is extremely important to be exceptionally good electrical insulating properties of the obtained gloves that provide protection against voltage up to 40 kV.

The invention is illustrated in the drawing, in which

Fig. 1 shows a block diagram of electro-forming process of latex gloves;

Fig. 2 schematically shows the step of introducing into the latex gloves, in a preferred embodiment, the injection is intermittent motion;

Fig. 3 shows a path of movement of the mould for forming the latex gloves providing insulation from electricity;

Fig. 4 schematically shows a nozzle arrangement directing air to the interdigital spaces.

The invention will be further illustrated in the examples whose purpose is merely a detailed presentation of preferred embodiments of the invention.

EXAMPLES

Example 1 (the process of being modified)

The latex compound further comprising potassium palmitate in an amount of 0.05% by weight is maintained at a constant temperature of 28°C in a stainless steel vat. A diaphragm ladle is thermally stabilized by means of circulating water circulating in the jacket. The water temperature is maintained by means of controlled electric heater temperature sensor immersed in a circulating water stream. Low speed centrifugal pump driven by a stepper motor with variable speed provides continuous movement and averaging the blend composition and temperature. The robot takes the form of the heating chamber, in which the form previously lived during the time required to heat it to the required temperature. Hot form the glove is introduced into the vat by a robot with a mixture of latex and maintained there for the required period of time. At this time, the surface of the mould followed by the formation of a gelled layer of the latex compound. Retention period mould submerged in the mix depends on the type latex rubber glove and the type of the latex used for the production. After completion of the gel-forming layer is removed form of a robot with a layer of coagulated blend and transfer it to the rack, which is followed by drying of the latex layer prior to the actual process of vulcanization. As a result of operations carried glove has been formed, which, after vulcanization is removed from the mould. The glove has stains on the tips of the fingers caused by dripping on the form of the latex residue when removing the mould from the ladle. Some fingertips are so visible, craters, conical depressions in the layer of latex is particularly evident when pressing the fingertips of the glove. Between the fingers of longitudinal irregularities are visible remnants of the broken film from the latex forming during removal of the mould from the ladle and cracking during obsychania. On the inner side of the glove are visible irregularities on the surface of the glove. These inequalities are caused by variations in the thickness of the glove and contribute to the deterioration of its electrical properties. Additionally, the outer surface of the glove made visible by vulcanizing flowing bleed droplets of the mixture and the layers zsuwajacych the latex. These stains formed when removing mould from a ladle. Described disadvantages of gloves heterogeneous affect their electrical insulating properties over the entire surface of the glove, the performance properties, exacerbated by the gloves with walls of different thicknesses as well as aesthetic value in the eyes of consumers gloves. Thanks to the invention was able to eliminate these drawbacks. These defects appear on a large part of the production batch are often distributed randomly on the products and may vary from small and difficult to identify random factors.

Example 2

To the rubber latex mixture was introduced surfactant in an amount of 0.15% by weight consisting of a mixture of at least three surfactant ingredients . The mixture consists of at least one component having an HLB> 17, one with HLB <4 and one having an HLB in the range 9-12. The amounts of resources are respectively 30 wt%, 35 wt% and 35 wt%. The additive used surfactants included: PEG-100 stearate, sorbitan tristearate olivate, PEG-7, respectively in the proportions of 3: 3: 4. The latex mixture was maintained in the tank to provide gentle stirring stabilizing the temperature at 28°C. To the latex dipped using a robot glove form of electro previously warms to 64°C. Form before immersion was covered with a thin layer of silicone oil dispensed from a pressurized container. Gentle lubrication forms facilitates later removal of the glove from the mould. Robot form dipped in a vat with a mixture of latex vertically fingers down at a speed of 5 cm/s. When the mould is immersed in a tank of the circulation pump was stopped the mixture. The form was in the mix 15 are produced depending on the type of the glove and the expected thickness of the layers forming coagulum. After completion of the coagulation process the layer of latex on a robot take out the mould from the latex at a speed of 3.5 cm/sec while maintaining the mould vertically downwards with the fingers. After emerging from the latex mould coated with a mixture gelled performed for 1 1 seconds gentle speed setting successively fingers up and down with your fingers. Then, the robot transmits a mould with its surface formed on the layer of latex for further processing. The surface of the gelled layer of the latex is equal to a smooth form no traces on the air bubbles or foam bubbles. Relieving the form of a robot arm gets hot another form nagrzewniczej chamber and thereafter start another moulding cycle glove.

Example 3

To the rubber latex mixture was introduced surfactant in an amount of 0.17% by weight of a mixture consisting of three components surfactants: sorbitan laurate, PEG-80 glyceryl stearate and cocoate glyceryl (glyceryl cocoate), PEG-7 in the weight ratio 3: 2: 5 . The latex mixture was maintained in the tank to provide gentle stirring stabilizing the temperature at 28°C. To the latex dipped using a robot glove form of electro previously warms to 64°C. Form before immersion was covered with a thin layer of silicone oil dispensed from a pressurized container. Gentle lubrication forms facilitates later removal of the glove from the mould. Robot form dipped in a vat with a mixture of latex vertically fingers down at a speed of 5 cm/s. When the mould is immersed in a tank of the circulation pump was stopped the mixture. Means stayed in a mixture of 120 sec. In general, the dipping time of the mould depends on the type produced glove mould temperature and the desired thickness of the layers forming coagulum. After completion of the coagulation process the layer of latex on a robot take out the mould from the latex at a speed of 5 cm/sec while maintaining the mould vertically downwards with the fingers. Immediately after slipping the fingers of the latex began to perform a series of robot motions mould, which provide uniform distribution box remains liquid and still uncoagulated mixture on the mould surface. The robot rotates along its axis form doing a turnover of 90°to the right and to the left with a frequency of 0.7 Hz. At the same time the form of a floating robot fingers up and then his fingers down a 3-sec cycle. Form was kept in motion for 13 seconds. Then, the robot transmits a mould with its surface formed on the layer of latex for further processing. The surface of the gelled layer of the latex is equal to a smooth form no traces on the air bubbles or foam bubbles. On the fingertips do not appear infiltrates, craters or thickening. Relieving the form of a robot arm gets hot another form nagrzewniczej chamber and thereafter start another moulding cycle glove.

Example 4

To the rubber latex mixture was introduced surfactant in an amount of 0.17% by weight consisting of a mixture of four surfactant ingredients : sorbitan laurate, PEG-80 sorbitan tristearate, glyceryl stearate and cocoate glyceryl (glyceryl cocoate), PEG-7 in the weight ratio 3: 2: 1 : 4. The latex mixture was maintained in the tank to provide gentle stirring stabilizing the temperature at 28°C. To the latex dipped using a robot glove form of electro previously warms to 64°C. Form before immersion was covered with a thin layer of silicone oil dispensed from a pressurized container. Gentle lubrication forms facilitates later removal of the glove from the mould. Robot form dipped in a vat with a mixture of latex vertically fingers down at a speed of 5 cm/s. While the mould was immersed in a tank of the circulation pump was stopped the mixture. Means stayed in a mixture of 105 sec. In general, the dipping time of the mould depends on the type produced glove mould temperature and the desired thickness of the layers forming coagulum. After completion of the coagulation process the layer of latex on a robot take out the mould from the latex at a speed of 4 cm/s while keeping the mould vertically downwards with the fingers. Immediately after slipping the fingers of the latex began to perform a series of robot motions mould, which provide uniform distribution box remains liquid and still uncoagulated mixture on the mould surface. The robot rotates along its axis form doing a turnover of 90°to the right and to the left with a frequency of 0.7 Hz. At the same time the form of a floating robot fingers up and then his fingers down a 3-sec cycle. For this after removing the mould from the latex, of a robot arm on all four interdigital spaces bilateral sliding off the slot nozzles through which air was administered to a moisture content of 95% and a temperature of 30°C. The amount of air to the respective nozzles were chosen so that its linear velocity was 1.4 m/s. Slit width was 2 mm blow. Approaching toward the nozzle pairs of the interdigital each slot bottom and the top of the hand resulting in possible breaking of the film from the latex, and smoothing the surface of the latex on the side walls of the fingers and thumb. Phase carried out by blowing air jets takes 10 seconds and then cuts off the air supply valve to the nozzles. The form was kept in motion after the removal from the latex over a period of 15 seconds.

Then, the robot transmits a mould with its surface formed on the layer of latex for further processing. The surface of the gelled layer of the latex is equal to a smooth form no traces on the air bubbles or foam bubbles. On the fingertips do not appear infiltrates, craters or thickening. There are also formed film between the fingers and any traces of breaking spread evenly over the surface of the side fingers. Relieving the form of a robot arm gets hot another form nagrzewniczej chamber and thereafter start another moulding cycle glove.

Example 5

To the rubber latex mixture was introduced surfactant in an amount of 0.17% by weight consisting of a mixture of five surfactant ingredients : sorbitan laurate, PEG-80 sorbitan tristearate, glyceryl stearate, PEG-8 oleate and cocoate glyceryl (glyceryl cocoate), PEG-7 in weight ratios of 3:1 :1 :1 :4. The latex mixture was maintained in the tank to provide gentle stirring stabilizing the temperature at 28°C. To the latex dipped using a robot glove form of electro previously warms to 64°C. Form before immersion was covered with a thin layer of silicone oil dispensed from a pressurized container. Gentle lubrication forms facilitates later removal of the glove from the mould. Robot form dipped in a vat with a mixture of latex vertically fingers down at a speed of 5 cm/s. When the mould is immersed in a tank of the circulation pump was stopped the mixture. Means stayed in a mixture of 95 sec. In general, the immersion time of the mould depends on the type produced glove mould temperature and the desired thickness of the layers forming coagulum. After completion of the coagulation process the layer of latex on a robot take out the mould from the latex at a speed of 4.5 cm/sec while maintaining the mould vertically downwards with the fingers. Immediately after slipping the fingers of the latex began to perform a series of robot motions mould, which provide uniform distribution box remains liquid and still uncoagulated mixture on the mould surface. The robot rotates along its axis form doing a turnover of 90°to the right and to the left with a frequency of 0.7 Hz. At the same time the form of a floating robot fingers up and then his fingers down a 3-sec cycle. For this after removing the mould from the latex, of a robot arm on all four interdigital spaces bilateral sliding off the slot nozzles through which the chilled air was administered to a moisture content of 95% and a temperature of 10°C. Prolonged period of colder air mixtures liquidity in the epidermal layer of the latex glove. The amount of air to the respective nozzles were chosen so that its linear velocity was 1.0 m/s. Slit width was 2 mm blow. Approaching toward the nozzle pairs of the interdigital each slot bottom and the top of the hand resulting in possible breaking of the film from the latex, and smoothing the surface of the latex on the side walls of the fingers and thumb. Phase carried out by blowing air jets takes 12 seconds and then cuts off the air supply valve to the nozzles. The form was kept in motion after the removal from the latex over a period of 18 seconds. Then, the robot transmits a mould with its surface formed on the layer of latex for further processing.

The surface of the gelled layer of the latex is equal to a smooth form no traces on the air bubbles or foam bubbles. On the fingertips do not appear infiltrates, craters or thickening. There are also formed film between the fingers and any traces of breaking spread evenly over the surface of the side fingers. Relieving the form of a robot arm gets hot another form nagrzewniczej chamber and thereafter start another moulding cycle glove.

Claims

We claim:

1. A method of forming latex gloves providing insulation from electricity characterized in that the method comprises preparing the latex composition in a vat while maintaining mild agitation and stabilizing the temperature at 28°C, in the prepared latex composition, the mold of the glove is immersed vertically with fingers down at the speed of 5 cm/s previously heated to the temperature of 64-79°C, wherein the mold before immersion is preferably further coated with a thin layer of silicone oil dispensed from a pressurized container, while submerging the mold in the vat the circulation pump in the mixture is stopped, maintaining the mold in the mixture from 16 s to 390 s, then removing the mold out of the latex mixture while maintaining the mold vertically with the fingers downwards, and after emerging from the latex mixture, performing revolutions with the mold coated by a gelled mixture, wherein said revolutions comprise setting the mold fingers up and down, and transmitting the form with the layer of latex formed on its surface for further processing.

2. The method of claim. 1 , wherein the mold is introduced into the vat by intermittent movement.

3. The method of claim. 1 or 2, wherein the mold is maintained in the latex mixture from 90 s to 125 s.

4. The method of claim. 3, wherein the mold is maintained in the latex mixture from 110 s to 120 s.

5. The method according to any one of claims. 1-4, wherein the latex mixture comprises a surfactant in an amount of 0.1-0.2% by weight consisting of a mixture of at least three surfactant ingredients, wherein at least one component having an HLB> 17, one having HLB <4 and one having an HLB in the range 9-12.

6. The method according to any one of claims. 1-5, wherein the latex mixture comprises a surfactant in an amount of 0.15% by weight comprising a mixture consisting of PEG- 100 stearate, sorbitan tristearate and olivate, PEG-7, respectively in the proportions of 3:3:4.

7. The method according to any one of claims. 1-5, wherein the latex mixture comprises a surfactant in an amount of 0.17% by weight consisting of a mixture of four surfactant ingredients : sorbitan laurate, PEG-80 sorbitan tristearate, glyceryl stearate and cocoate glyceryl PEG-7, in a weight ratio 3: 2:1 : 4.

8. The method according to any one of claims. 1-5, wherein the latex mixture comprises a surfactant in an amount of 0.17% by weight consisting of a mixture of five surfactant ingredients: sorbitan laurate PEG-80, sorbitan tristearate, glyceryl stearate, olivate PEG-8, cocoate glyceryl and PEG -7 in a weight ratio of 3:1 :1 :1 :4.

9. The method according to any one of claims. 1-8, wherein after removing the mold fingers from the latex mixture, with still uncoagulated mixture on the surface of the mold, the cycle of the mold movements begin.

10. The method according to any one of claims. 1-8, wherein after removing the mold fingers from the latex mixture, with the coagulated mixture on the surface of the mold, the cycle of the mold movements begins.

11. The method according to any one of claims. 10, wherein the mold is removed at a speed of 3.5 cm/s from the latex mixture after completion of coagulation of the latex layer and when the mold is removed from the latex mixture, wherein said mold is coated with gelled mixture, the gentle movements are performed for 11 seconds.

12. The method according to any of claims 1- 1 , wherein immediately the mold is raised to the position with fingers up and then fingers down in a cycle lasting 3 seconds and the mold is maintained in motion for 13 seconds.

13. The method of claim. 12, wherein the form is rotated along its axis turning 90°to the right and to the left at a frequency of 0.7 Hz and at the same time the mold is raised to the position with fingers up and then down in a 3-second cycle, wherein the mold is maintained in motion for 13 seconds.

14. The method according to any one of claims. 1-13, wherein the mold is removed from the latex mixture at a speed of 4.5 cm/sec while maintaining the mold vertically with the fingers downwards.

15. The method according to any one of claims. 1-14, wherein just after removing the mold from the latex mixture, air is passed, having a moisture content of 95% and a temperature of 30°C, between all four interfinger spaces.

16. The method of claim. 15, wherein the amount of air directed to the respective nozzles provide a linear speed of 1.4 m/s.

17. The method of claim. 16, wherein the width of the blast slits are 2 mm.

18. The method of claim. 15-17, wherein the phase of blowing air through the nozzles is carried out for 10 seconds, and then with the valve the air supply to the nozzles is cut off.

19. The method of claim. 15-18, wherein the mold is kept in motion after removal from the latex for 15 seconds.

20. A latex article providing insulation from electricity obtained by the method according to any of claims 1-19.

21. The article of claim. 20, wherein the article is a glove.