PVC disposable gloves and manufacturing method of production process thereof

- Aug 10, 2020-

【Patent Abstract】

The invention relates to PVC disposable gloves and a production process thereof. The process includes: mixing PVC resin compound and plasticizer to form glove formula compound; forming glove compound film into compound film; placing two layers of compound film in parallel to form glove raw film; The side is covered with an insulating layer; an electromagnetic beam is applied to the surface of the glove material film to make the electromagnetic beam pass through the glove material film; the electromagnetic beam is distributed on the surface of the glove material film according to a preset contour trajectory, so that the glove material film on the preset contour trajectory is melted; Pressure is applied on the preset contour trajectory, so that the two layers of mixed material film in the glove material film are pressed and fused along the preset contour trajectory to form a PVC-type disposable glove. The production process of PVC disposable gloves provided by the present invention can reduce environmental pollution, improve the working environment of workers, and reduce the production cost of PVC disposable gloves.


 【Background technique】

PVC disposable gloves are a widely used daily product. PVC disposable gloves refer to a mixture of PVC resin (a mixture of PVC resin and other materials, and other materials refer to plastic products that are compatible with PVC. When the mixing ratio of the material is 0, it is pure PVC resin, but it is also collectively referred to as PVC resin mixture in this article) disposable gloves made of raw materials; disposable gloves made of a mixture of PVC resin and other materials and pure PVC -Secondary gloves have the same or similar performance.

 PVC disposable gloves have good elasticity, are comfortable to use and are easy for users to operate, so they are widely used in households, hospitals, and food industries.

At present, the traditional production process steps for manufacturing PVC disposable gloves are as follows:

Step 1. Mix the PVC resin mixture with plasticizers such as dioctyl phthalate (DOP) or diisononyl phthalate (DINP) to form a paste to make the glove soft.

Step 2. Add a large amount of viscosity reducer (a kind of low aromatic solvent oil) to the above paste to make it thin, form a thin paste, and become a mixture, the purpose is to reduce the weight of a single glove.

Step 3. Put the above mixture into a trough;

 Step 4. Use a chain to drive a number of ceramic (or metal) three-dimensional hand molds into the above-mentioned trough, so that the palm of the hand mold is covered with a layer of paste mixture;

Step 5. The chain will bring the hand mold to the oven for baking, plasticize the layer of paste mixture on the hand mold, and dry it to form a film glove according to the shape of the hand mold;

Step 6. The chain then takes the hand mold with molded gloves out of the oven to cool down;

Step 7. The cooled gloves are separated from the hand mold manually or mechanically, and counted and stored;

Step 8. After peeling off the gloves, the clean hand mold enters the trough to dip the material and enter the next production cycle.

 The above-mentioned traditional PVC disposable glove production process was invented in the United States at the beginning of the last century. It is a typical outdated process with high pollution and high labor intensity. After being introduced to mainland China from Taiwan in the 1980s and 1990s, the craft has not been completely transformed. The disadvantage of this old process is the use of a large amount of solvent oil viscosity reducer, which is added to the mixture. These mineral spirits have no other effect in the glove production process except that the mixture becomes thinner to reduce the thickness and weight of the glove. However, after these mineral spirits are evaporated in the oven, they will form petroleum vapor pollutants into the atmosphere, causing serious air pollution.

According to actual production statistics, according to the traditional technology, every ton of PVC disposable gloves produced will emit 0.26 tons of petroleum vapor pollutants into the atmosphere on average. At present, the annual output of PVC disposable gloves in my country is about 500,000 tons, which means that about 130,000 tons of petroleum vapor pollutants are emitted into the atmosphere every year. According to the current technical level, effective recovery of these pollutants is extremely difficult. These pollutants are difficult to degrade after entering the atmosphere, and it generally takes more than five years to completely degrade. These oil vapors float in the air and form haze when they meet with water vapor, and they bind to form PM2.5 particles when they meet with dust, which causes great harm to human survival and safety. The areas where PVC disposable glove manufacturers are concentrated are all well-known air pollution areas in the country. One of the pollution sources is the petroleum vapor emitted during the production of PVC disposable gloves.

At the same time, the solvent oil viscosity reducer used in the traditional PVC disposable glove production process is completely evaporated and emptied after baking in the oven, which is equivalent to an increase of nearly 20% in the cost of gloves. The high-speed production line driven by the high-speed chain keeps the operators in high-intensity work at all times. In the summer, the heat emission caused by the oven baking of the hand mold makes the workshop temperature as high as 50°C. The working environment of the operators is extremely bad, and the heat stroke often occurs.

This set of old and backward PVC disposable gloves production technology has continued to this day and has not been completely transformed. This kind of backward production capacity is all over China, causing the above-mentioned series of catastrophic consequences. The development of the times and the progress of society require us to use new technological progress to eliminate such backward production capacity and improve our country's production, labor and living environment. Therefore, it is very important to change the production process of this old and backward PVC disposable gloves.

 

[Content of the invention]


The purpose of the present invention is to provide PVC disposable gloves and a production process thereof, which can reduce environmental pollution and improve the working environment of workers, and reduce the production cost of PVC disposable gloves.

In the embodiment of the present invention, a production process of PVC disposable gloves is provided, and the process includes:

Mix PVC resin mixture and plasticizer to form glove formulation mixture;

Making the glove formula mixture into a mixture film;

Placing two layers of the compound film in parallel to form a glove material film;

Covering one side of the glove material film with an insulating layer;

Applying an electromagnetic beam on the surface of the glove material film, so that the electromagnetic beam passes through the glove material film;

Enabling the electromagnetic beam to be distributed on the surface of the glove material film according to a preset contour trajectory to melt the glove material film on the predetermined contour trajectory;

Applying pressure on the preset contour trajectory, so that the two layers of the compound film in the glove material film are pressed and fused along the preset contour trajectory;

 A blade-shaped incision is formed along the outer edge of the preset contour track, and the part of the fused track including the fused track is separated from the glove material film and opened at the wrist of the preset contour track , Forming PVC disposable gloves.


The production process of the PVC disposable gloves of the above embodiment of the present invention has the following beneficial effects:

 1. The raw materials for manufacturing gloves no longer contain solvent oil viscosity reducers, which eliminates the pollution of solvent oil to the air. If all the production processes are adopted, it can reduce nearly 130,000 tons of solvent oil for the PVC disposable glove industry in China every year. The emission of steam to the atmosphere greatly reduces environmental pollution and has extremely high environmental protection value.

 2. Plasticizers such as DOP or DINP used in the production of PVC disposable gloves will evaporate 2-3% at a high temperature of about 200°C to produce a small amount of air pollution. The plasticizer vapor is cooled and collected by electrostatic adsorption. This part of a small amount of pollutants is recovered, thereby further reducing the pollution discharge of the process, basically achieving zero discharge of pollutants, further reducing environmental pollution, and improving the environmental protection value of the process.

3. No solvent oil viscosity reducer can greatly reduce the production cost of PVC disposable gloves. In addition, the recovery of plasticizer vapor also further reduces the production cost of PVC disposable gloves.

 Fourth, there is no production step of glove baking, no need to use oven, which reduces energy consumption and pollution caused by energy consumption.

 5. Because the whole production process does not produce high temperature, and there is no pollution caused by plasticizer evaporation, thus improving the working environment of production workers.

6. As there is no need to manually remove the PVC disposable gloves from the hand mold, the labor intensity of the operators is reduced.

7. Properly heat the glove material film at a temperature not exceeding 90°C, which will help to fuse firmly and make the finished product stronger.

 8. Adding an insulating layer between the glove material film and the electrode can help prevent electric sparks during the transmission of high-frequency electromagnetic waves, thereby avoiding damage to the palm-shaped mold and affecting product quality.

 9. Counting the separated PVC disposable gloves to facilitate the subsequent process to pack the gloves according to a set number.

latex surgical glove making machine

【Rights request】

 1. The production process of PVC disposable gloves, characterized in that the process includes: mixing PVC resin mixture and plasticizer to form glove formula mixture; forming said glove formula mixture into a mixture film; Layer the compound film in parallel to form a glove material film; cover one side of the glove material film with an insulating layer; apply an electromagnetic beam on the surface of the glove material film to make the electromagnetic beam pass through the glove material film; The electromagnetic beam is distributed on the surface of the glove material film according to a preset contour trajectory, so that the glove material film on the predetermined contour trajectory is melted; pressure is applied on the predetermined contour trajectory to make the glove The two layers of the mixed material film in the raw film are pressed and fused together along the preset contour track; a blade-shaped incision is formed along the outer edge of the preset contour track, and the fusion track includes the fused The part of the trajectory is separated from the glove material film and opened at the wrist of the preset contour trajectory to form a PVC-type disposable glove.

 2. The production process of PVC disposable gloves according to claim 1, characterized in that, while applying pressure on the preset contour trajectory, heating the glove material film to no more than 90 V. 3.

 3. The production process of PVC-type disposable gloves according to claim 1, characterized in that said making the glove formula mixture into a mixture film comprises: making the gloves by calendering method, blown film method or casting method The formula mixture is made into a mixture film. `

 4. The production process of PVC disposable gloves according to claim 1, characterized in that, the process further comprises: collecting the plasticizer vapor generated in the process of making the glove formula mixture into a mixture film; The plasticizer vapor is cooled to form plasticizer droplets; and the plasticizer droplets are recovered by electrostatic adsorption.

 5. The production process of PVC disposable gloves according to claim 1, wherein the applying electromagnetic beams on the surface of the glove material film comprises: feeding the glove material film between two electrodes, An electromagnetic beam of 27.12MHZ or 40.68MHZ is applied between the two electrodes.

 6. The production process of PVC disposable gloves according to claim 5, wherein the applying pressure on the preset contour track comprises: one of the two electrodes has a shape corresponding to the preset contour track ; Move one of the two electrodes to the other electrode, and press the glove material film between the two electrodes.

 7. The production process of PVC disposable gloves according to claim 1, characterized in that said separating the part of the fusion trajectory including the fusion trajectory from the glove material film comprises: clamping the glove material film Tightly, a pressure perpendicular to the glove material film is applied to the part of the fusion track including the fusion track to separate the part within the fusion track from the glove material film.

 8. The production process of PVC disposable gloves according to claim 1, wherein the process further comprises: counting the separated PVC disposable gloves.

 9. The production process of PVC disposable gloves according to claim 1, wherein the plasticizer comprises: dioctyl phthalate DOP and/or diisononyl phthalate DINP; The glove formulation compound, in parts by mass, includes: 100 parts of PVC resin compound and more than 50 parts of plasticizer.

 10. A PVC-based disposable glove, characterized in that, the PVC-based disposable glove comprises two pieces of the glove material film placed in parallel according to claim 1; the edges of the two pieces of the glove material film pass through an electromagnetic beam Fuse them together to form a fusion seam that runs through the entire glove edge.