KR101737507B1 - High absorbent polyvinyl chloride sponge, foreign body capture device using the same and method for preparing the same - Google Patents

Abstract

There is disclosed a superabsorbent polyvinyl chloride sponge capable of reducing moisture absorption and foreign matter collecting ability of a PCB substrate and a liquid crystal display (LCD) as well as reducing the manufacturing cost by reusing the same, a foreign matter collector using the same, and a manufacturing method thereof do. The superabsorbent polyvinyl chloride sponge absorbs moisture by pores formed in the entire structure, and is composed of 30 to 60% by weight of polyvinyl chloride; And 30 to 60% by weight of dioctyl phthalate.

Description

TECHNICAL FIELD The present invention relates to a high absorbent polyvinyl chloride sponge, a foreign body collecting device using the same, and a manufacturing method thereof,

The present invention relates to a superabsorbent poly (vinyl chloride) sponge, a foreign matter collector using the same, and more particularly, to a high absorptive poly (vinyl chloride) sponge having improved water absorption ability and foreign matter collecting ability of a PCB substrate and a liquid crystal display Absorbing polyvinyl chloride sponge, a foreign matter collecting device using the same, and a manufacturing method thereof.

Sponge rolls used for moisture absorption in the cleaning process of PCB substrate and liquid crystal display (LCD) are made of polyvinyl acetate (PVA), polyvinyl chloride (PVC) or the like And polyurethane (PU) as raw materials. Among them, sponge rolls using polyvinyl acetate (PVA) have an advantage of being excellent in water absorption ability and abrasion resistance and being inexpensive. However, when moisture is completely evaporated and dried, the product is hardened, There is a problem that it is difficult to reuse, and the mechanical property and the chemical resistance are low as compared with sponge rolls using other raw materials. Sponge rolls using polyurethane (PU) maintain softness even when dried and have excellent water absorption ability, excellent heat resistance, and strong resistance to strong alkaline solvents. However, methyl ethyl ketone (MEK) and toluene It is weak in the same polar solvent and may be discolored during use and has a disadvantage of high cost. In sponge rolls using polyvinyl chloride (PVC), smoothness is maintained even during drying, so that water absorption capacity is excellent, and mechanical properties, heat resistance and chemical resistance are also excellent. However, compared with sponge rolls using the polyurethane (PU) There is a problem that the physical properties and the water absorption ability are poor, and that it is weak in strongly alkaline solvents.

Meanwhile, the sponge roll may be coated with a silicone rubber having a hardness of 40 to 50 A, which is an adhesive component for removing (or collecting) foreign substances from the PCB substrate and the liquid crystal display (LCD). However, when such a silicone rubber is coated on a sponge roll, since the hardness of the silicone rubber is high and the collecting force of the foreign substances positioned between the circuits is lowered, it is impossible to completely remove all the foreign substances on the substrate, There is a problem causing damage. Therefore, in the case of a sponge roll using polyvinyl chloride (PVC), it is possible to further improve physical properties and water absorption ability, and furthermore, a component coated on the sponge roll to remove foreign matter (that is, ) Can be lowered.

It is an object of the present invention to provide a superabsorbent poly (vinyl chloride) sponge capable of absorbing moisture on a PCB substrate or improving the ability to dehydrate absorbed water, and a method for producing the same.

Another object of the present invention is to provide a foreign matter collector using a highly absorbent poly (vinyl chloride) sponge capable of improving foreign matter collecting ability of a PCB substrate and a liquid crystal display (LCD) and a method of manufacturing the same.

Still another object of the present invention is to provide a highly absorbent polyvinyl chloride sponge capable of reducing the cost required by being washed and reused, a foreign matter collector using the same, and a method of manufacturing the same.

In order to achieve the above object, the present invention provides a polyolefin composition for absorbing moisture by pores formed in the entire structure, comprising 30 to 60% by weight of polyvinyl chloride; And 30 to 60% by weight of dioctyl phthalate.

The present invention also relates to a superabsorbent polyvinyl chloride sponge comprising 30 to 60% by weight of polyvinyl chloride and 30 to 60% by weight of dioctyl phthalate, which absorbs moisture by the pores formed in the entire structure. And a tacky silicone composition coated on the outer surface of the superabsorbent poly (vinyl chloride) sponge, the tacky silicone composition for trapping foreign matter, wherein the silicone composition comprises 5 to 200 wt. Parts per 100 parts by weight of the polyvinyl chloride and dioctyl phthalate The present invention provides a foreign matter collector using a superabsorbent polyvinyl chloride sponge coated with a negative content.

Further, the present invention relates to a method for producing a polyvinyl chloride film, which comprises mixing 30 to 60% by weight of polyvinyl chloride and 30 to 60% by weight of dioctyl phthalate and further adding 700 to 800 parts by weight of sodium chloride per 100 parts by weight of the polyvinyl chloride , Mixing and dispersing; Extruding the dispersed mixture into a mold, and vulcanizing the mixture; Cooling the forming mold filled with the mixture, and then separating the molding from the molding mold; And a step of removing the salt of the molded product and drying the molded product. The present invention also provides a method of producing a superabsorbent polyvinyl chloride sponge.

The present invention also includes a step of coating a sticky silicone composition on the outer surface of the superabsorbent polyvinyl chloride sponge obtained by the method for producing a superabsorbent polyvinyl chloride sponge to trap foreign matter, Absorbing polyvinyl chloride sponge is coated in an amount of 5 to 200 parts by weight based on 100 parts by weight of polyvinyl chloride and dioctyl phthalate contained in the superabsorbent polyvinyl chloride sponge.

The present invention relates to a superabsorbent polyvinyl chloride sponge, a foreign particle collector using the same, and a method of manufacturing the same, which can improve the ability to absorb moisture on a PCB substrate or dehydrate absorbed moisture, LCD), and further, since it can be reused after cleaning, the cost can be reduced.

1 is a perspective view (A) and a side sectional view (B) of a superabsorbent poly (vinyl chloride) sponge roll according to an embodiment of the present invention.
FIG. 2 is a photograph of a pore formed on the outer circumferential surface and the side surface of a superabsorbent poly (vinyl chloride) sponge roll and a conventional poly (vinyl chloride) roll according to an embodiment of the present invention, measured by a scanning electron microscope.
3 is a view for comparing the absorbency of pores formed on the outer circumferential surface and the side surface of a superabsorbent polyvinyl chloride sponge roll and a conventional polyvinyl chloride roll according to an embodiment of the present invention.
4 is a graph showing the heat resistance of a superabsorbent polyvinyl chloride sponge and a conventional polyvinyl chloride roll according to an embodiment of the present invention.
FIG. 5 is a graph showing a foreign matter component collected in a foreign matter collector using a high-absorptive poly (vinyl chloride) sponge according to another embodiment of the present invention. FIG.
6 is a view showing a state in which a foreign matter collector using a high absorption polyvinyl chloride sponge according to the present invention is used.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

1 is a perspective view (A) and a side sectional view (B) of a superabsorbent poly (vinyl chloride) sponge roll according to an embodiment of the present invention. The high absorbent PVC sponge according to the present invention may be manufactured in the form of a cylindrical roll having an empty central portion in the longitudinal direction as shown in Fig. 1, (PVC) and dioctyl phthalate (DOP), which can be prepared in any form, if it can be used in conformity with the intended use, such as a sheet, Polyethylene glycol (PEG), silica, and / or pigment (s).

The polyvinyl chloride (PVC) is for improving the extensibility of the sponge, and its content is 30 to 60% by weight, preferably 35 to 55% by weight, more preferably 40 to 50% by weight. The polyvinyl chloride Is out of the above range, the extensibility of the sponge may be lowered. The dioctyl phthalate (DOP) affects the viscosity of the sponge, and its content is 30 to 60% by weight, preferably 35 to 55% by weight, more preferably 40 to 50% by weight, Is out of the above range, the viscosity of the sponge may become too high or low.

The polyvinyl chloride (PVC) and the dioctyl phthalate (DOP) are used in a weight ratio of 1: 1 to 1: 2, preferably 1: 1 to 1: 1.7, more preferably 1: 1 to 1: If the content of the dioctyl phthalate is out of the above range, the viscosity increases to cause problems in the production of the superabsorbent polyvinyl chloride sponge according to the present invention, that is, in the extrusion process, or the viscosity is lowered, The mechanical properties may deteriorate.

Meanwhile, sodium chloride (NaCl) in a solid state is used in the production of the superabsorbent polyvinyl chloride sponge according to the present invention. When sodium chloride in solid state is used as described above, After the vinyl sponge is finally prepared, pores are formed in the place where sodium chloride is located by removing the salt (sodium chloride) by a method such as dissolution. FIG. 2 is a graph showing the results of measurement of pores formed on the outer circumferential surface and side surfaces of a superabsorbent poly (vinyl chloride) sponge roll and a conventional polyvinyl chloride roll according to an embodiment of the present invention by a scanning electron microscope (SEM) 2A and 2B are photographs of the outer circumferential surface and side surface of a superabsorbent polyvinyl chloride sponge roll according to an embodiment of the present invention, respectively, and FIGS. 2C and 2D are photographs of a typical polyvinyl chloride And the outer circumferential surface and the side surface of the roll are measured. As shown in FIG. 2, the pores (A, B) formed on the outer circumferential surface and the side surface of the superabsorbent poly (vinyl chloride) sponge roll according to the embodiment of the present invention are formed on the outer circumferential surface of a conventional poly (C, D), the number of the pores is much larger, and the pore size and structure are also various. That is, according to the present invention, when sodium chloride is used in a solid state and pores are formed by removing the salt, the pores are increased and absorption power can be improved.

3 is a view for comparing the absorbency of the pores formed on the outer circumferential surface and the side surface of the superabsorbent polyvinyl chloride sponge roll and the ordinary polyvinyl chloride roll according to the embodiment of the present invention, Absorbent polyvinyl chloride sponge roll according to an embodiment of the present invention, and FIGS. 3C and 3D are photographs of the outer circumferential surface and the side surface of a conventional polyvinyl chloride roll, respectively. 3, the pores B formed in the side surface of the superabsorbent poly (vinyl chloride) sponge roll according to the embodiment of the present invention are pores (C, D) formed on the outer circumferential surface and side surfaces of a conventional polyvinyl chloride roll Absorbing rate of moisture increases with time, and pores (A) formed on the outer circumferential surface of the superabsorbent polyvinyl chloride sponge roll are also formed on the outer circumferential surface of the superabsorbent polyvinyl chloride sponge roll In the case of removing the coating film, the appearance of the side surface of the superabsorbent polyvinyl chloride sponge roll is shown.

The content of sodium chloride to be added in the production of the superabsorbent polyvinyl chloride sponge according to the present invention is 700 to 800 parts by weight, preferably 700 to 780 parts by weight, more preferably 730 to 780 parts by weight based on 100 parts by weight of the polyvinyl chloride. To 780 parts by weight, and when the content of sodium chloride is less than 700 parts by weight based on 100 parts by weight of the polyvinyl chloride, the continuity of the pores formed in the sponge is lowered and the water absorption rate is lowered, If the content of sodium chloride is more than 800 parts by weight, the hardness of the sponge may be lowered, so that it may be softer, but the abrasion resistance and mechanical properties may be remarkably deteriorated. In addition, the particle size of the sodium chloride may vary depending on the pore size of the desired PVC sponge, but it is preferable to use sodium chloride having a particle size of 20 to 70 mu m, preferably 30 to 60 mu m, more preferably 45 to 55 mu m It is good to use.

On the other hand, the superabsorbent poly (vinyl chloride) sponge according to the present invention may contain polyethylene glycol (PEG) in an amount of 1 to 5% by weight, preferably 1 to 4% by weight, more preferably 2 to 3% ), 0.1 to 1% by weight, preferably 0.3 to 1% by weight, more preferably 0.3 to 0.7% by weight of silica and / or 0.1 to 0.5% by weight, preferably 0.1 to 0.4% Preferably 0.2 to 0.3% by weight of a pigment (wherein the polyethylene glycol, silica and pigment may be added independently of each other, or two or more of them may be added together).

The polyethylene glycol (PEG) affects the hydrophilicity and viscosity of a product (sponge). When the polyethylene glycol is contained in the superabsorbent polyvinyl chloride sponge according to the present invention, the content of the polyethylene glycol is 5 wt% If the content is less than 1% by weight, the viscosity of the resulting product tends to be high, which may cause processing problems. The silica affects the hydrophilicity of the product (sponge) and does not exhibit a large change depending on the content. However, when the silica is contained in the high absorption polyvinyl chloride sponge according to the present invention, the content of the silica Is more than 1% by weight, the mechanical strength may be lowered, the material (silica) may be eluted at the time of application of the sodium chloride to the dissolution process and the facilities in the future, and if the content of the silica is less than 0.1% by weight, There is a possibility that the granting of the grant is insufficient. The pigment may be used for imparting hue to the superabsorbent polyvinyl chloride sponge according to the present invention or for protecting the inside, and preferably has a fire resistance.

The above superabsorbent polyvinyl chloride sponge has fine pores continuously formed densely (porous), has a high smoothness on the surface, and is excellent in absorbency (absorption rate and absorption rate), moisturizing property and dewaterability , Hydrophilicity improvement), the size and structure of the pores can be controlled, and the hardness is 4 to 5 A, whereby the hardness can be controlled by natural absorption of water. In addition, it is also possible to maintain the softness (flexibility) even in a dry state without water, to have excellent elasticity in wetting (when the amount of water is small, absorption speed becomes very fast, etc.), excellent chemical resistance , Mechanical properties (maximum strength, modulus, elongation), and durability against sunlight, and has a low precipitation phenomenon of components, no static electricity, no fiber lint and dust caused by use, There is an advantage that the production cost is lower than that of a conventional polyvinyl chloride roll.

4 is a graph showing the heat resistance of a superabsorbent polyvinyl chloride sponge and a conventional polyvinyl chloride roll according to an embodiment of the present invention. As shown in FIG. 4, the cleaning polyvinyl chloride sponge and the conventional polyvinyl chloride roll according to an embodiment of the present invention exhibit substantially similar heat resistance up to a certain temperature, but after the temperature exceeds about 500 ° C., . That is, the superabsorbent poly (vinyl chloride) sponge according to one embodiment of the present invention maintains the heat resistance even after the temperature exceeds about 500 DEG C, but the ordinary polyvinyl chloride roll has heat resistance after exceeding the temperature of about 500 DEG C .

The results of testing the chemical resistance of the superabsorbent polyvinyl chloride sponge according to the present invention are shown in Table 1 below.

As shown in the above Table 1, even if strong acid and strong basic chemicals are absorbed into the superabsorbent poly (vinyl chloride) sponge according to the present invention, the amount of the absorbent is usually about 1 to 3% (30 % Hydrochloric acid is absorbed), the roll is swollen, and it can be seen that it is not greatly affected by chemicals such as strong acidity and strong basicity.

The apparent specific gravity is 0.32 to 0.34 g / cm ³ , the porosity is 75 to 85%, the modulus of elasticity is 1 to 1.5 kg / cm ² , and the tensile strength is 2.8 to 3.2 kg / cm 2 ^2, the elongation at break is from 115 to 130%, temperature is from about 75 ℃ or less, a number average molecular weight (Mn) of 10,000 to 200,000, preferably from 50,000 to 100,000, more preferably 70,000 to 80,000, a weight average molecular weight (Mw) Is from 50,000 to 300,000, preferably from 100,000 to 200,000, and more preferably from 150,000 to 170,000. As a result of the mechanical properties test, the maximum strength was 0.047 Kgf / mm ² , the modulus was 0.038 Kgf / mm ² , and the elongation was 165.173% The maximum strength of the vinyl roll was 0.044 Kgf / mm ² , the modulus was 0.036 Kgf / mm ² , and the elongation was 146.258%.

The superabsorbent polyvinyl chloride sponge according to the present invention can be used as an absorbent for absorbing etching water and washing water used for a printed board or the like, absorbing a developing solution of an automatic developing machine, a fixing solution and washing water, absorbing and removing oil after washing a photosensitive resin plate But it can also be used as various sludge and dewatering rollers for solid-liquid separation, squeeze rollers (paper) and various kinds of skis rollers for forced dehydration, Roller, feed roller for preventing paper car-ring, ink roller, full roller and various coating rollers, and also can be used for reel-to-roll and horizontal copper plating lines (FCCL, PCB) for transportation.

Next, a foreign matter collector using a high absorption poly (vinyl chloride) sponge according to another embodiment of the present invention will be described. The foreign matter collector using the high absorption polyvinyl chloride sponge according to another embodiment of the present invention collects the foreign substance of the PCB substrate and the liquid crystal display (LCD) on the outer surface of the high absorption polyvinyl chloride sponge according to the embodiment of the present invention And can be produced in any form such as a cylindrical roll or a flat sheet according to the shape of the superabsorbent polyvinyl chloride sponge, For example, the outer surface 120 of the superabsorbent poly (vinyl chloride) sponge roll 100 shown in Fig. 1 may be in the form of a roll coated with a sticky silicone composition. Meanwhile, when the PVC sponge and the foreign particle collector using the PVC sponge are in the form of rolls, a support bar for fixing the PVC sponge and the foreign particle collector using the PVC sponge may be installed in the central part hollowed in the longitudinal direction.

The silicone composition is used in an amount of 5 to 200 parts by weight, preferably 10 to 100 parts by weight, more preferably 30 to 70 parts by weight, based on 100 parts by weight of polyvinyl chloride and dioctyl phthalate constituting the PVC sponge, Liquid silicone, High Temperature Vulcanizing (HTV) silicone or Room Temperature Vulcanizing (RTV) silicone, which can be coated on PVC sponge, can be used.

In addition to the above silicone composition, if necessary, it may further contain 0.1 to 1.5 parts by weight, preferably 0.3 to 1 part by weight, of black carbon, a curing agent and a mixture thereof, based on 100 parts by weight of the silicone. If the content of the black carbon is less than 0.1 parts by weight based on 100 parts by weight of the silicone, there is a fear that the antistatic effect is not obtained. If the content is more than 1.5 parts by weight, have. On the other hand, the curing agent can be used to control the degree of curing of the foreign matter collector using the superabsorbent poly (vinyl chloride) sponge according to the present invention.

Further, when the silicone composition is coated on the foreign particle collector, embossing processing having various patterns and sizes can be performed on the surface thereof, if necessary. The purpose of embossing the surface of the product is to prevent the foreign matter collector from being separated from or hardly separated from the substrates such as the substrate and the LCD by the adhesive force of silicon (that is, by the adsorptivity due to the surface tension) , Which greatly affects the trapping power of foreign matter.

When the sticky silicone composition is coated on the superabsorbent polyvinyl chloride sponge according to one embodiment of the present invention, the hardness of the extruder using the superabsorbent polyvinyl chloride sponge is 7 to 12 A, preferably about 10 A So that it is possible to easily collect foreign matters located between the circuits on the substrate (that is, between the circuits in which the removal of the foreign matter is not easy due to the step difference), and the risk of damaging the circuit is also reduced. This is because a roll (for example, a silicone rubber roll having a hardness of 40 to 50 A) that removes a foreign substance has a low foreign matter collecting ability, thereby causing damage to the substrate by applying an excessive pressure, .

In addition, the foreign matter collecting device using the superabsorbent poly (vinyl chloride) sponge according to the present invention does not leave any scratches on the surface of the substrate, such as peeling off the ink since the silicon (Si) does not flow out Do not. In particular, during the cleaning process of the build up and package thin film (35 탆) products and the FPCB (for RF) products, rolling does not occur. In addition, unlike conventional tape type adhesive rollers which have been replaced with new (clean) rolls (no consumables) for reuse (consumable), the costs have increased, the high absorption polychlorinated The foreign matter collector using the vinyl sponge is a method of controlling the adhesion of the silicone composition to the adhesive roll (by receiving the foreign matter collected on the PVC cleaning roll) by adjusting the degree of adhesion of the silicone composition (for example, strength, The cleaning roll can be easily transferred to an apparatus (not shown) capable of continuously removing foreign matter without interruption, or simply washed and reused, thereby reducing the cost.

In addition, like conventional tape-type adhesive rollers, due to the precipitation of foreign matter that can not be caught, scratches such as scratch marks on the substrate may be generated, or the foreign matter collecting ability may be partially deteriorated due to abrasion It is possible to maximize the partial collecting force even if it is worn out), and there is no possibility that the quality of the substrate is lowered due to the adhesive component of the tape. By virtue of these advantages, the use of the foreign substance collector according to the present invention makes it possible to improve the overall quality and productivity of the object to be removed.

FIG. 5 is a graph illustrating a foreign matter component collected in a foreign substance collector using a high-absorptive poly (vinyl chloride) sponge according to another embodiment of the present invention. Subsequently, a test was conducted to analyze the foreign matter components collected in the foreign substance collector according to the present invention. First, points A, B, and C are marked on the foreign particle collector according to the present invention, and the release tapes are respectively adhered to the points, and foreign matters are transferred. Next, the transferred foreign matters were randomly collected, pretreated for analysis, and then measured using a scanning electron microscope (SEM) and an energy dispersive X-ray spectroscopy (EDX) , And the results are shown in Tables 2, 3 and 5 below.

Sample collection point Particle size (㎛) of foreign matter collected at A site Particle size (μm) of the foreign matter collected at the B site Particle size (㎛) of foreign matter collected at C site 1 point 320 220 130 2 points 230 305 26 3 points 233 456 654 4 points 340 406 326 5 points 336 330 131 6 points 242 138 393 7 points 40 494 111 8 points 194 794 151 9 points 128 196 297 10 points 199 293 280

Sample
Collection point Collected on site A
Component of foreign matter Collected at site B
Component of foreign matter Collected at the C site
Component of foreign matter 1 point C, Si, S, Ca, Ba C, Ti, Fe, Zn, Si, Al C, Fe, Na, Si, Ca 2 points C, Ti, Fe, Si, S, Ca C, Ti, Fe, S, Si C, Fe, Na, Si, Ca 3 points Cr, Fe, Si, Ca Cu, Si, Ca C, Fe, Si, Ca 4 points Ti, Fe, Si, Ca C, Ti, Fe, Ba, Si, Ca, S C, Fe, Zn, Si, Ca 5 points Cu, Si Fe, Zn, Si, Ca Cu, Fe, Si, Ca 6 points C, Mg, Si, Ca, K C, Fe, Na, Si, Ca Cr, Fe, Mn, Si, Ni 7 points C, Na, Si, Ca, K C, Ti, Fe, Si, S, Ca, Ba C, Mg, Na, Si, Ca 8 points Al C, Ti, Na, Si, S, Ca, Ba Cr, Fe, Mn, Si, Ni 9 points Fe, Si, Ca C, Fe, Mg, Al, Si, K, Ca C, Fe, Ti, Si, Ca, Ba 10 points Ti, Fe, Mn, Si, Mg, K C, Ti, Fe, Na, Si, S, K, Ca, Ba Al, Si, Ca

As shown in Tables 2 and 3, and as shown in FIG. 5, the particle size of the foreign matter collected in the foreign particle collector according to the present invention is mainly 150 to 350 μm, which is much smaller than the conventional foreign matter removing apparatus It is possible to collect even the foreign matter of. In addition, the captured foreign matter is mainly composed of a metal component having an irregular shape, and a large amount of the metal components are collected in the order of silicon (Si), calcium (Ca), iron (Fe) and titanium (Ti) From this, it can be seen that the foreign matter collector according to the present invention is very useful for removing foreign substances, that is, metal components on the substrate.

Next, a superabsorbent poly (vinyl chloride) sponge according to the present invention and a method of manufacturing a foreign matter collector using the same will be described. (PVC sponge) of 30 to 60% by weight, preferably 35 to 55% by weight, more preferably 40 to 50% by weight, and poly (vinyl chloride) (PVC) (DOP) of 60 to 60% by weight, preferably 35 to 55% by weight, more preferably 40 to 50% by weight, based on 100 parts by weight of the polyvinyl chloride, (NaCl), preferably 700 to 780 parts by weight, more preferably 730 to 780 parts by weight, of NaCl, and mixing and dispersing the mixture, extruding the dispersed mixture into a mold and vulcanizing , Separating the molding from the molding die after cooling the molding die filled with the mixture, and removing the salt of the molding and drying the molding.

The mixing of the polyvinyl chloride and the dioctyl phthalate can be carried out using a stirrer such as a screw for 2 to 3 hours, preferably 2.3 to 2.7 hours, and the mixing is carried out for less than 2 hours , There is a fear that the compounding is not normally carried out and the physical properties of the product may be lowered. If it exceeds 3 hours, self-gelation may occur during compounding, which may cause curing during mixing with sodium chloride.

The mixture of the polyvinyl chloride and the dioctyl phthalate and the sodium chloride may be carried out by a conventional mixing method using a stirrer and the like in the same manner as the mixing of the polyvinyl chloride and the dioctyl phthalate, Do. When the primary mixing is completed, the mixture is dispersed using a small extruder or the like (preferably two to three dispersions), and then mixed using a mixing device such as a roll mill for 3 to 10 minutes, ≪ / RTI > for 5 to 7 minutes. At this time, if the mixing time is less than 3 minutes, the mixing is not normally performed, and strong shrinkage occurs at the portion where sodium chloride is present in the dried final product after the salt is removed in the subsequent process, and the dimension of the product becomes unstable If the mixing time exceeds 10 minutes, a gelation phenomenon may occur, which may cause processing problems due to high viscosity in the subsequent extrusion process. On the other hand, when the secondary mixing is carried out by a roll mill, the gap between the roll mills is preferably adjusted to about 5 mm or so, and if the interval between the roll mills is too narrow, If the interval of the roll mill is too wide, dispersion with sodium chloride may not be normally performed.

The extruded material may be extruded by a conventional extruder. The extruded material may be extruded through a molding die. The extruded material may be extruded through a mold, And can be carried out at an extrusion rate of about 100 to 150 rpm, preferably 120 to 140 rpm. If the extrusion rate is less than 100 rpm, the production rate of the product may become slow and the product may not be completely filled in the mold. If the extrusion rate exceeds 150 rpm, the viscosity may increase and the extruder may malfunction. After the mixture is filled in a mold, it is preheated by putting it in a refluxing warmer at a temperature of about 50 to 90 DEG C, preferably 65 to 75 DEG C, and then heated to about 150 to 200 DEG C, preferably 170 to 180 DEG C, Lt; / RTI > On the other hand, the preheating and vulcanization time vary depending on the size of the product, and Table 4 shows preheating and vulcanization time according to the product (roll) size.

Product Size (Ф) Warm-up time (minutes) Curing time (min) 16 20 30 25 25 40 40 30 55 60 40 65

After the molding die filled with the mixture is completely cooled (quenched), the molding must be separated (or released) from the molding die by using a hydraulic machine or the like. The salt desorption of the molding may be performed using a conventional desalinizer have. At this time, the water temperature of the desalinator should not exceed about 40 ° C. If the water temperature is higher than this temperature, the product may be shrunk when dried. On the other hand, the confirmation of whether or not the salt of the molding has been completely removed can be accomplished by immersing the molded article in water after completely drying the molded article. When the molded article floats on the water surface, the salt of the molded article is completely removed. Finally, the desalted moldings are dried in a reflux conditioner at 30 to 40 캜, preferably 33 to 37 캜, to produce the superabsorbent polyvinyl chloride sponge according to the present invention.

Next, a method of manufacturing a foreign matter collector using the high-absorptive poly (vinyl chloride) sponge will be described. The outer surface of the prepared high-absorptive poly (vinyl chloride) sponge is coated with a sticky And coating the silicone composition.

The above-mentioned superabsorbent polyvinyl chloride sponge and the above-mentioned foreign matter collecting device using the same can be used separately for each use, but may be used together in a series of processes. 6 is a view showing a state in which a foreign matter collector (in the form of a roll) using a superabsorbent poly (vinyl chloride) sponge according to the present invention is used. As shown in FIG. 6, the foreign matter collector 200 includes a substrate, (FIG. 6 shows a total of four pieces of upper and lower two pieces in order to collect the foreign substances 212 on the upper and lower parts 210 and 210). However, the amount of foreign substances or the shape of the substrate may vary depending on process conditions The above superabsorbent polyvinyl chloride sponge may be used in a process of absorbing moisture such as an etching liquid or washing water, applying a printing material or the like, or collecting a foreign substance by the foreign particle collector 200 for line transfer or the like It can be used in pre-processing or post-processing.

While the present invention has been described with reference to particular embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the invention. Should be interpreted to include both.

Claims (6)

delete delete Absorbing polyvinyl chloride sponge comprising 30 to 60% by weight of polyvinyl chloride, 30 to 60% by weight of dioctyl phthalate, polyethylene glycol and silica, which absorbs moisture by pores formed throughout the structure; And
And a tacky silicone composition coated on the outer surface of the superabsorbent polyvinyl chloride sponge for trapping foreign matter,
Wherein the silicone composition is coated in an amount of 5 to 200 parts by weight based on 100 parts by weight of the polyvinyl chloride and the dioctyl phthalate and comprises 0.1 to 1.5 parts by weight of black carbon based on 100 parts by weight of the silicone composition. Foreign body collecting machine using highly absorbent poly (vinyl chloride) sponge. 30 to 60% by weight of polyvinyl chloride, 30 to 60% by weight of dioctyl phthalate, polyethylene glycol and silica are mixed and then 700 to 800 parts by weight of sodium chloride are further added to 100 parts by weight of the polyvinyl chloride, Mixing and dispersing; Extruding the dispersed mixture into a mold, and vulcanizing the mixture; Cooling the forming mold filled with the mixture, and then separating the molding from the molding mold; And
Removing the salt of the molded product, and drying the molded product, thereby producing a superabsorbent polyvinyl chloride sponge; and
Coating a sticky silicone composition on the outer surface of the polyvinyl chloride sponge to collect foreign matter,
The silicone composition is coated in an amount of 5 to 200 parts by weight based on 100 parts by weight of polyvinyl chloride and dioctyl phthalate contained in the superabsorbent polyvinyl chloride sponge, and 0.1 to 1.5 parts by weight Wherein the black sponge comprises black carbon. The method of claim 4, wherein the particle size of the sodium chloride is 20 to 70 microns, the mixing of polyvinyl chloride and dioctyl phthalate is performed for 2 to 3 hours, the extrusion is performed at a rate of 100 to 150 rpm, Is carried out at a temperature of 150 to 200 DEG C and the removal of the salt is carried out at a water temperature of 40 DEG C or lower and the drying is carried out at a temperature of 30 DEG C to 40 DEG C. The production of a foreign matter collector using a superabsorbent polyvinyl chloride sponge Way. delete

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