KR100316519B1 - A fadrication method of foamed polyethylene sheet having a air transmitting function and it products using the sheet - Google Patents

Abstract

The present invention relates to a method for manufacturing a low density foamed polyethylene sheet having buoyancy, cold resistance, and moisture resistance, and relates to a manufacturing apparatus and a sheet of a low density foamed polyethylene sheet having the above functions and having breathability.

In the apparatus for producing a foamed polyethylene sheet having air permeability, a punching piece 12 is formed in the upper roller 10, and a through hole engaged with the punching piece 12 of the upper roller 10 under the upper roller 10. A punching part 1 is provided to provide a lower roller 20 having the lower side 21 formed therein, or the punching part 2 includes an upper plate 50 and a lower plate 60, and a punching piece ( 52 is formed, the lower plate 60 is formed with a through hole 61 at the same position as the punching piece 52 of the upper plate 50, the low-density foamed polyethylene sheet (sheet) between the punching portions (1, 2) (100) to provide a manufacturing apparatus for forming the micro-holes 110 on the surface, by using the tapered micro-holes 110 is formed to produce the sheet 100 is formed clothing 200, tent There is a gist of the present invention so that the present invention can be applied to items such as the 300, the raincoat 400, the shoe 500, the building interior material 600, and the wrapping paper 700.

Description

A fading foam method and its manufacturing apparatus {A fadrication method of foamed polyethylene sheet having a air transmitting function and it products using the sheet}

The present invention relates to a low density foamed polyethylene sheet having a buoyancy, cold resistance and moisture resistance and a manufacturing apparatus, and to provide a low density foamed polyethylene sheet having both buoyancy, cold resistance and moisture resistance while having breathability. .

It is a fabric that has excellent breathability and has all the features of buoyancy, cold resistance, and waterproofness, and outdoor workers wearing uniforms or jackets are advantageous in various situations.

When wearing the equipment as described above, when the movement of the weather under severe conditions, the body temperature is protected from the outside air when worn, and at the same time buoyancy and waterproofness, depending on the clothing that is easy to cross the river or walk easily do.

As climbers and hikers always have the potential to cross rivers, cope with floods, or endure cold, the same benefits can be found when wearing clothing made of this material. In order to make the best use of the material's medical care, the material's medical care not only has a number of properties, but it also needs to be comfortable, bulky and difficult to handle.

And water sports enthusiasts also have a number of benefits when wearing this material.

Clothing with buoyancy, cold resistance, and water resistance can find its ideal utility in many activities in practice, and it is well known to use foam materials in various medical applications to provide thermal insulation.

As a representative example, the lining is a heat-insulating garment using a foamed foam material of an independent bubble, preferably polyvinyl chloride, which is thick and difficult to handle, and does not have sufficient buoyancy to support weight in water. The inner core consists of a continuous or independent foam sponge or a thermal insulation laminate for shaped space suits and wet suits, which require a skin impermeable rubber or plastic, which shows a medium possibility but is a life-saving equipment. Insufficient buoyancy to use.

Insulation or filler of liferafts and life jackets are in the form of polyethylene, for example, a low-density polyethylene form, which is a foaming agent and two types treated with 1,2-dichlorofluoro methan, is widely known. However, this is difficult to handle due to the bulkiness of the polyethylene and the blowing agent by heating them under pressure to explode them into the air to form foaming properties and to actually use the product.

Similarly, shaped chlorinated crosslinked polyethylene forms are also known for use in the manufacture of floats and medical linings.

Although the use of such various blowing agents and crosslinking agents is known, shaped articles are thick and difficult to handle.

In order to solve the problems as described above, there has been provided a fabric made of a foamed expanded low density polyethylene manufacturing method (Japanese Patent No. 2549275) having both excellent buoyancy and heat resistance as follows.

Look at the foamed polyethylene manufacturing method below.

1) Low density polyethylene is mixed in a hopper with about 1% by weight of azodicarbonamide as blowing agent and about 0.1 to 0.2% by weight of surfactant and about 0.3% by weight of zinc carbide as stripper to form a dry granular mixture. and,

2) transfer the mixture through a screw conveyor installed in the first part of the heating tunnel at the above-mentioned hops under atmospheric pressure supplied in the pressurized state and put it on the screw conveyor;

V) heating the mixture at a temperature of about 170 ° C. to form a mass;

Ii) upon raising the mass of the mass to about 200 ° C., vaporizing the blowing agent to foam and expand the low density polyethylene to form bubbles in the mass;

Iii) lowering the temperature of the expanded and expanded polyethylene to about 150 ° C. to partially shrink and cure the bubbles;

V) gaseous dichlorofluoromethane as a blowing agent is introduced into the polyethylene ingot to further expand and expand the nuclear polyethylene ingot, thereby reinforcing the above bubbles of the ingot;

Iii) the above-mentioned ingot is prepared to cut the nucleus and cooled to a temperature of about 100 ° C,

3) the polyethylene ingot is placed in the second portion of the heating tunnel and cut into a predetermined amount to form a cut mass;

4) transfer the cut mass through a screwless conveyor prepared in the second part of the heating tunnel while reheating it to about 105 ° C. in preparation for pushing out the cut mass;

5) The reheated mass is pushed out of the screwless conveyor described above to a free expansion zone at room temperature at atmospheric pressure, in which the bubble expands spontaneously, not explosive at room temperature and pressure. and,

6) form the extruded ingots into sheets or tubes,

7) A low density polyethylene sheet having buoyancy, cold resistance and moisture resistance can be produced by supplying a flexible low density polyethylene sheet or tube characterized by excellent buoyancy and heat resistance by cooling the sheet or tube at room temperature for at least 24 hours. there was.

About 10 times the effect of the cold protection effect criterion of the sheet produced by the above-described method can be obtained, and in the buoyancy test, the sheet is immersed in fresh water for 24 hours and the deviation from the basic buoyancy must be 5% or less. Very good as 1.7.

However, the sheet thus produced shows a very excellent function in buoyancy, cold resistance and moisture resistance, but relatively close to the outside air, there was a drawback that can not discharge the hot air inside.

Therefore, the present invention has been researched and developed to secure the above-mentioned defects, the object of the present invention is to discharge the internal air to the outside fabric to the fabric produced by the manufacturing method as described above and to prevent the internal inflow of external air It is to provide a device for producing a fabric and a fabric made of expanded polyethylene excellent ventilation by providing a fine ventilation hole that can be blocked.

In order to achieve the object of the present invention, in the manufacturing method as described above, the inner side of the fabric is wide and the outer side by providing a punching portion of the roller or plate shape to form a micro hole in the surface of the fabric undergoing a cooling process The above object can be achieved by providing a punching device for densely forming finely formed micropores.

1 is a manufacturing apparatus of a polyethylene foam sheet breathable by combining the punching unit of the present invention in the manufacturing process of the foam polyethylene sheet.

Figure 2 is a front sectional view showing a first embodiment of the present invention punching portion

Figure 3 is a side cross-sectional view of a first embodiment of the present invention punching portion

Figure 4 is a cross-sectional view showing a second embodiment of the present invention punching portion

5 is an enlarged cross-sectional view showing main parts of sheet paper processed according to the above embodiment;

6 is an enlarged cross-sectional view of the sheet paper processed by the above embodiment in the state of overlapping several sheets;

Figure 7 is a sheet showing another example of the present invention

8 is a sheet of another embodiment of the present invention

9 is a fragmentary cross-sectional view of the garment using the sheet

10 is a simplified perspective view of a tent using the sheet;

11 is a simplified perspective view of a woo using the sheet;

12 is a partially broken perspective view of shoes using the sheet

Figure 13 is a schematic cross-sectional view showing the building interior materials using the sheet

14 is a cross-sectional view schematically showing a state of use of the wrapping paper using the sheet;

☞ Explanation of symbols used in the main part of the drawing ☜

1,2: Punching Section 10: Upper Roller

11,54: space part 12,52: punching piece

13,53: air hole 14: rotating shaft rod

15: inlet hole 16,55: connector

20: lower roller 21, 61: through hole

50: top plate 60: bottom plate

100: sheet 110,130: micropores

150: hypophoria 200: clothing

210: inner shell 220: outer shell

300: tent 400: right

500: Shoes 530: Endothelial

540: jacket 600: interior materials

700: wrapping paper

It is an object of the present invention to provide a low density foamed polyethylene sheet having the function of a low density foamed polyethylene sheet having buoyancy, cold resistance and moisture resistance, and having breathability, and a manufacturing apparatus thereof.

The basic manufacturing process of the sheet is an extruder 90, which extrudes a low density foamed polyethylene into a tubular shape and cuts it with an incision machine 91 to form a sheet, which is then subjected to a cooling process 92, and then wound on a roll 93. As described above, detailed description of the same low density foamed polyethylene sheet as described above is omitted.

Low-density foamed polyethylene sheet (sheet) that is the manufacturing process does not have air permeability and the inner air layer is formed in the range of about 0.5 ~ 1mm, the thickness of about 300g sheet can lift the weight of about 130kg Have buoyancy.

In order to form a vent hole in the sheet having no such breathability, it must be put in a roller-type or plate-shaped punching part to form micro holes in the surface. At this time, due to the micropores formed by the punching portion, the buoyancy of the effect does not decrease sharply, but there is about 10% buoyancy loss, but it does not cause much damage to other features of the sheet.

Figure 2 is a front sectional view showing a first embodiment of the punching part of the present invention, Figure 3 is a side sectional view of a first embodiment of the punching part of the present invention.

The punching portion 1 is roughly divided into an upper roller 10 and a lower roller 20.

The upper roller 10 forms a space 11 enclosed therein, and forms a conical small punching piece 12 at a predetermined interval (dense spacing) on the outside. In the center of the punching piece 12, the air hole 13 penetrates from the inside to the outside to allow the compressed air to pass therethrough. The inlet hole 15 is formed in the rotary shaft rod 14 of the upper roller 10, and the compressed air is connected to an external device (compressor) and a connector 16 (which can connect the rotor and the fixed body). To supply. The lower roller 20 is formed with a through hole 21 engaged with the punching piece 12 of the upper roller 10. The space between the upper roller 10 and the lower roller 20 is maintained such that a low density polyethylene foam sheet passes through the upper roller 10 and the lower roller 20. A low-density foamed polyethylene sheet (100) having a softening state, which is not completely cooled by the manufacturing method, is introduced to form a tapered microhole (110) on the surface of the sheet (100). At this time, the upper roller 10 and the lower roller 20 is engaged or rotated by one driving means, it is natural that the two rollers should always rotate at the same rotation ratio.

4 is a cross-sectional view showing a second embodiment of the present invention punching portion.

The second embodiment of the punching part 2 of the present invention is composed of the upper plate 50 and the lower plate 60 of the same size as the plate shape, wherein the lower plate 60 is fixed to the gas, etc. and the upper plate 50 is driven. The means 51 is allowed to move up and down by a certain height. On the upper plate 50, conical small punching pieces 52 are formed at regular intervals (dense intervals). In the center of the punching piece 52, the air hole 53 is penetrated from the inside to the outside so that the compressed air can pass therethrough. In addition, an upper portion of the upper plate 50 is provided with a closed space 54, which supplies compressed air by connecting to an external device (compressor) and a connector 55. The lower plate 60 forms a through hole 61 at the same position as the punching piece 52 of the upper plate 50 so that the lower plate 60 may be engaged when the punching piece 52 descends. When the low-density foamed polyethylene sheet 100 is inserted between the upper plate 50 and the lower plate 60 of the plate-shaped punching part 2 configured as described above, the upper plate 50 is lowered to form a fine hole 110 in the sheet 100. ) Will be formed.

The punching parts 1 and 2 according to the first and second embodiments as described above are each punching piece 12, in which compressed air flowing from an external device into the spaces 11 and 54 is operated during operation. The lower through-holes 21 and 61 are discharged to the air holes 13 and 53 of the 52 so that the punched material can be smoothly discharged to the outside without being blocked by the punched material.

In the first and second embodiments described above, the sheet 100 as shown below may be obtained by densely penetrating the micropores 110 through the low density foamed polyethylene sheet.

Fig. 5 is an enlarged cross-sectional view of the main portion of the sheet processed according to the embodiment.

In the sheet 100 of the present invention, as shown in the drawing, micropores 110 are tapered from the inside to the outside. As already mentioned, the conventional foamed polyethylene sheet has very good buoyancy, cold resistance, and water resistance, but lacks air permeability, and the tapered micropore 110 provides such air permeability.

That is, since the tapered micropore 110 of the present invention is formed with a wide hole 111 and an outer side with a narrow hole 112, the air layer located therein remains activated by temperature change and is relatively The outer air layer becomes inactive compared to the inner air. At this time, the activated air layer inside is to move to the outside through the outer narrow hole (112). On the contrary, the outside cold air layer should be introduced into the inside through the narrow hole 112, but the outside air is prevented from entering the inside by the pressure difference generated in the process of discharging the activated air layer to the outside.

6 is a cross-sectional view showing a state in which a plurality of sheets of the present invention are stacked and sewn.

In this way, even if several sheets are folded and sewn, there is no problem in the airflow of the present invention. As can be seen from the micropore 110 of the present invention is formed in a tapered shape from the inside to the outside air passing through the inner sheet 100 through the fine hole 110 'of the next sheet 100' outside Can be discharged to

7 is a sheet illustrating another example of the present invention, but the tapered micropores 120 are formed in the sheet 100 at right angles, but it may be obvious that the sheet 100 may be used at different angles.

8 is a cross-sectional view showing a sheet according to another embodiment of the present invention. In forming the micropores 130 on the sheet 100, the inner and outer diameters may be formed in the same state. In this case, the effects as described above are considerably weak.

Hereinafter, various articles to which the breathable sheet 100 according to the present invention can be applied will be described.

9 is a partial cross-sectional view of a garment using the sheet, FIG. 10 is a simplified perspective view of a tent mainly used by campers, and FIG. 11 shows a raincoat using the present invention.

In the main configuration of the clothing 200, it is composed of the interior material 210 in contact with the skin and the exterior material 220 exposed to the outside. In between them, the insulating layer 230 (cotton, duck down, etc.) having a breathability while maintaining breathability is embedded in the present invention, in the present invention, the sheet 100 is used as the insulating layer 230 and the present invention sheet ( 100) is sewn into one or a plurality of stitching and inserted.

As described above, the clothing 200 incorporating the seat 100 has buoyancy, cold resistance, and moisture resistance, and is excellent in breathability, and is used for clothing such as a jacket, a jacket worn by an angler, a mountaineer, a soldier who performs outdoor activities, and the like. When the clothing is worn, it is preferable to prevent the body from lowering the body temperature from the outside air and discharge moisture (sweat), etc., discharged from the body temperature to the outside, such as clothing using a conventional low density foamed polyethylene sheet. There is no problem to block the skin by blocking the use of the vest worn by water sports, so that you can float on the water enough without wearing a life jacket separately.

In addition, when constructing the outdoor equipment such as the tent 300, the sheet 100 of the present invention is used as one or more stitches of the present invention, and the hypothermia 150 is adhered to the surface thereof to block cold air and the internal air. Emissions to the outside allow the outdoor activist to cope with the cold while adequately coping with external weather conditions (especially in the rain). At this time, the tent 300 may be configured by using only the sheet 100 of the present invention.

And as shown in Figure 11 when using the sheet of the present invention when constructing a raincoat as well as the outdoor equipment used to sew one or a plurality of sheets 100, and by attaching a hypothesis 150 on the surface of the raincoat ( As 400) to prevent rain water from flowing into the interior. This may also be produced only by the sheet 100 of the present invention.

The clothing 200 or outdoor equipment of the above-described configuration, or the raincoat is composed of a sheet 100 having buoyancy or built-in, so that the outdoor activist who wears it does not panic even when crossing water in an unexpected situation. You can do it.

12 is a partially broken perspective view of a shoe using the seat of the present invention, and between the inner skin 530, 540 of the side portion 510 or the bottom 520 of the shoe 500. The sheet 100 is piled up in one or a plurality and sewn into and used.

When the shoe 500 is constructed in this way, particularly those who live in low-temperature regions or outdoor activists as described above, the foot is warmed from the outside air, but the moisture generated by long-term activities due to the ventilation between the inside and outside It can be discharged to the outside to prevent foot damage from sweating.

FIG. 13 is a cross-sectional view schematically showing a building interior material using the sheet of the present invention. As the sheet 100 of the present invention is used as the building interior material 600 (wall paper, flooring, etc.), a wall 610 or a floor 620 is used. The sheet 100 to the upper side of the one or a plurality of overlap by processing it is placed. According to the present invention constituted as described above, the conventional building interior material is provided with a condition that molds may be inhabited by blocking interior air flow from the floor or walls, and thus cockroaches may be inhabited, thereby providing a seat 100 according to the present invention. Using the wall 610 or the bottom 620 and the outside air flow through the micro-pores 110, the mold is not inhabited, so that you can live in a more comfortable environment. In addition, when the sheet 100 is used as the building interior material 600, it is possible to obtain sufficient heating efficiency while saving heating oil by the thermal insulation effect.

14 is a sectional view schematically showing a state of use of a wrapping paper using the sheet of the present invention. When the fruit, fish, meat, etc. are used as the wrapping paper 700 to be applied to the outside at the time of storage using the sheet 100, the wide side of the fine hole 110 is exposed to the outside.

In this way, fruit, fish, meat, etc. are packaged and stored in a low temperature warehouse. At this time, the contents of the package are easily damaged due to a temperature difference between the inside of the low temperature warehouse and the contents. To prevent this, a sufficient oxygen supply to the contents is required. Sheet 100 of the present invention at this time is a wide hole is located on the outside to allow the air flow to the contents to deliver cold air directly to the contents of the cold warehouse to supply oxygen to prevent the contents from corruption .

The present invention as described above is not limited to the above embodiment, it will be obvious that the usability can be further extended by using the lining of a bed, blanket, cushion, and the like.

As described in detail above, the sheet 100 of the present invention provides a roller-type or plate-shaped punching portion to form the micro-holes 110 on the surface thereof, so that the micro-holes 110 having a wide inner side and a narrow outer side of the fabric are formed. As it is densely formed and widely applied to clothing or outdoor equipment, building materials, packaging materials, etc., it has excellent buoyancy, cold resistance, moisture resistance, and breathability. Therefore, it is possible to dramatically improve clothing or related equipment of outdoor workers. It can be provided with clothing that is composed of a relatively thin sheet that is comfortable to wear and easy to handle. And when such clothing is worn for thermal insulation purposes, an excellent effect can be obtained, and if an accidentally falls into the river, or in the case of walking, an advantage can be obtained.

When you enjoy water skiing by wearing the above-mentioned clothing (life preserver), clothing is relatively light and buoyancy and flotation are maintained even if the sewing part is broken or torn. This is improved.

What has been described above is only one embodiment of the present invention, the present invention is not limited to the above-described embodiment, it is common in the art to the art without departing from the gist of the invention claimed in the following claims Those skilled in the art can easily change the same technology as the present invention as long as the basic technical configuration.

Claims (11)

In the manufacturing apparatus of the foamed polyethylene sheet having the function of low-density foamed polyethylene sheet having buoyancy, cold resistance and moisture resistance while also having breathability, The convex punching piece 12 is formed in the upper roller 10 inside the spaced part 11 at a predetermined interval (tightly spaced), and at the center of the punching piece 12, an air hole ( 13 to allow the compressed air to pass therethrough, and also forms an inlet hole 15 in the rotary shaft rod 14 of the upper roller 10, which includes an external device (compressor) and a connector 16 (times). Connecting the whole and the fixed body) to supply air, Under the upper roller 10 is provided with a punching portion (1) for providing a lower roller 20 having a through hole 21 is engaged with the punching piece 12 of the upper roller 10, Breathability, characterized in that to form a tapered micropores 110 on the surface of the low-density foamed polyethylene sheet 100 in a softened state that is inserted between the upper and lower rollers 10 and 20 of the punching part 1 Apparatus for producing expanded polyethylene sheet. In the manufacturing apparatus of the foamed polyethylene sheet having the function of low-density foamed polyethylene sheet having buoyancy, cold resistance and moisture resistance while also having breathability, The punching unit 2 is composed of an upper plate 50 and a lower plate 60, The conical punching piece 52 is formed in the upper plate 50 at a predetermined interval (tight spacing), and allows compressed air to pass through the air hole 53 in the center of the punching piece 52, In the upper part, a sealed space 54 is formed and connected to an external device through a connector 55 to supply compressed air. The through plate 61 is formed on the lower plate 60 at the same position as the punching piece 52 of the upper plate 50, The lower plate 60 is fixed to the base and the upper plate 50 is lowered by a predetermined height by the driving means 51 so as to be inserted between the upper and lower plates 50 and 60, the softened low density foamed polyethylene sheet 100 Apparatus for producing a foamed polyethylene sheet having a breathable, characterized in that to form a tapered micro-holes 110 on the surface. In constructing the foamed polyethylene sheet 100 in which the fine holes 110 are densely formed so as to have the function of a low density foamed polyethylene sheet having buoyancy, cold resistance, and moisture resistance, and having breathability, Micropore 110 of the sheet 100 is a foamed polyethylene sheet having a breathability, characterized in that formed in a tapered form of light-resistant and narrow. delete delete delete delete delete delete delete delete