TW442319B - Porous plastic filter for separating fine particle - Google Patents

Abstract

This invention provides (1) sintered powder thermoplastic plastic material particles of porous plastic filter which has at least one surface with water contact angle of 60 DEG and above, preferably 90 DEG and above, and 5 to 90 mu m average particle diameter of thermoplastic material, (2) the integrated porous plastic substrate and surface possess at least one layer of porous layer and the average particle diameter of the porous plastic substrate is the larger diameter portion of the sintered plastic material particle and the porous layer's average particle diameter is the smaller diameter portion of the sintered crosslinked polyolefin resin particle. The above-mentioned materials characterizes the multi-layer porous plastic filter, and (3) during the formation of the porous plastic substrate through sintering thermoplastic material particle, surface of the porous portion is rendered conductivity by conductive material which possesses mutual solubility with the porous plastic substrate surface. Electrostatic coating is applied on the smaller diameter of the porous plastic substrate composition. The porous plastic substrate a t least the porous portion has smaller particle diameter than its substrate after it is heated. The porous plastic filter is characterized by the layered and melted integration of porous materials.

Description

f 442319 A7 B7 Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of the invention (1) The present invention relates to a porous plastic filter for separating and filtering fine particles contained in fluids such as liquids and gases, and its manufacturing method. Among them, many are known as porous plastic filters for separating and filtering fine particles such as dust mustard contained in fluids such as liquids and gases. Among them, there are plastic filters with different pore sizes on the inflow and outflow sides of the liquid. For example, any inflow or outflow side has a large pore size formed by plastic material particles with a larger average particle size, and the other side has a smaller average particle size. The diameter of the plastic material particles forming a small pore porous multi-layer filter is better from the viewpoints of improving filtration precision, higher collection efficiency of particles, and low pressure loss. Therefore, thermoplastic plastic materials with a larger average particle size have Calcined polyethylene, polypropylene, polyethylene, polyether sulfide, polyphenylene sulfide, etc. On the surface of the porous plastic substrate after molding, polytetrafluoroethylene (average particle size) smaller than the plastic material ( Hereinafter, "PTFE") and the adhesive are directly adhered at the same time, and a porous filter having a porous layer with a different pore diameter on the outer surface and the inner surface of the porous plastic filter substrate is proposed. However, the P TF E used in this porous filter has poor particle characteristics. Therefore, the interface adhesion between the above-mentioned porous plastic substrate and P TF E is insufficient. During filtration and backwashing, PTFE is easily formed by porous plastic. When the substrate is dropped, as a result, the pore diameter is different, or a part of the difference is caused, which causes the collection performance of the filter to be reduced, or the dropped PTFE particles mixed with the collected fine particles. In addition, a method of covering the surface of a porous plastic substrate with a PTFE porous film having a smaller pore diameter than that of the porous plastic substrate has also been proposed. 'However, the same problem as that described above occurs with poor adhesion to the substrate' I Paper size applies to Chinese National Standard (CNS) A4 specification (210 X 297 mm) i Private -------- ΐτ ------ ^ (Please read the note ^^ on the back before filling this page) -4-, 442 3 1 9 at ___B7_ V. Description of the invention (2) The porous membrane made of PTFE has high autogenous price, and the manufacturing cost also rises accordingly. (Please read the note on the back before filling in this page.) Furthermore, it is proposed to pressurize and compress the surface of the porous plastic substrate formed by calcination to make it pressurized. The pore size of the compressed surface is smaller than that of the other part. However, this method has difficulty in adjusting pressure and compression, and it is difficult to form a uniform small-aperture surface. The present invention aims to solve the above-mentioned difficulties by using the following three key characteristics of the plastic filter and its manufacturing method as the main axis "(1) At least one of the porous plastic filters in the porous plastic filter obtained after the molding of the calcined thermoplastic plastic material particles The surface water contact angle is more than 60 degrees | Preferably more than 90 degrees, meanwhile, the average diameter of the particles is at least 5 and 9 0 4 m. The thermoplastic plastic material has a characteristic porous plastic filter. And printed by the Shelling Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs (2) the integrated porous plastic substrate and its surface has at least one porous layer, and the average particle diameter of the porous plastic substrate is larger when burned After forming the thermoplastic plastic material particles, those with a large pore size are obtained, and the average particle diameter of the porous layer is calcined. The cross-linked polyolefin-based resin material particles are shaped, and the multilayer porous plastic filters are characterized by having a small pore size. And (3) calcined thermoplastic plastic material particles are formed into a porous plastic substrate at the same time, and a conductive material is attached to the surface of the porous part to conduct electricity After that, the porous plastic substrate has compatibility with the surface of the porous plastic substrate, and the particles constituting the porous plastic substrate are electrostatically coated with a thermoplastic plastic material having a smaller average particle diameter. After the porous plastic substrate is heated, the porous plastic substrate is porous. Porous layer with a plastic material whose at least porous portion will have a smaller diameter than its substrate. The paper size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) -5-Chinese Ministry of Economic Standards 夬Printed by the local shellfish consumer cooperative ^ 442 3 19 at ______B7_ V. Description of the invention (3) A method of manufacturing a multi-layer porous plastic filter integrated with its characteristics after coating and fusion. The porous plastic filter of the present invention is a thermoplastic plastic material that is calcined and formed into a porous single-layer structure, or that the multi-pore diameter of the calcined thermoplastic plastic material with a different average particle diameter is a porous coating with a small diameter. It is also possible to have a porous multi-layer structure fused together. The porous plastic filter obtained by calcining the thermoplastic plastic material of the present invention may be a porous single-layer structure or a porous composite structure. The focus is on using a fluid containing particles, such as a fluid, a gas, or a fluid outflow side. The contact angle of the surface with water is 60 degrees or more, preferably 90 degrees or more, and a thermoplastic plastic material having an average particle size of at least 5 and 90 / zm or less. Among them, when the surface plastic filter with a contact angle of less than 60 degrees will amplify the free energy of the surface, the particles attached to the surface of the filter cannot be washed away during backwashing, which may cause blockage and make it practically difficult. In addition, the weight and point of the particles of the thermoplastic plastic material are those with an average particle diameter of 5 from m to 90 jam, preferably 10 j «m to 6 0 jt / m, and the surface contact angle with water is Above 60 degrees, preferably above 90 degrees. .When the average particle size is above 5 jam and below 90 μιη, there is a thermoplastic material with a smaller average particle size, or a thermoplastic material with a larger average particle size can also be added in a fixed amount. The contact angle with water on the surface is 60 degrees or more, preferably 90 degrees or more. In general, the amount of addition only needs to take into account that when the average particle size is less than 5 / zm, the paper size does not make the Chinese National Standard (CNS) A4 specifications (210X297 mm) (please read the precautions on the back before filling out this page). 6 — Printed by the Central Government Bureau of the Ministry of Economic Affairs, Consumer Cooperatives »442 319 at _B7_ V. Description of the invention (4) Causes an uneven filling phenomenon in the mold 'or the average particle size exceeds 9 0 jam will not prevent the inability to fully collect dust mustard, etc. The surface collection of micro particles can be insufficient. The thermoplastic plastic material constituting the porous plastic filter of the present invention can use ultra-high molecular weight polyethylene, high-density polyethylene and other polyethylene, polypropylene and other polyolefin resins, and polychloride. Polyester resins such as vinyl resins, polyarylates, polyamide resins, polystyrene resins, acrylic resins, polyethylene resins, polyether resins, polyethylene sulfide resins, and more Fluorine-based resins, cross-linked polyolefin-based resins, and the like can be used, and generally the average particle diameter is in the range of 5 Am to 9 0 μm. It is preferably from 10 to 60, except for those obtained by calcination to obtain a thermoplastic plastic material having a porous body, and there is no other limitation. In particular, if the melt flow index (hereinafter referred to as "MFR") is small, in particular, those who use materials with an MFR of 0.01 or less are suitable if a porous plastic filter with a uniform pore size can be obtained. The polyolefin-based resin material is crosslinked by irradiating ionizing radiation such as r-rays and X-rays to low-density polyethylene 1, medium-density polyethylene, high-density polyethylene, and other polyolefin resins, and then crosslinking Or use inorganic compounds such as aluminum chloride and nitrogen fluoride as cross-linking agents, tertiary-butyl monocumenyl-peroxide, dicumenyl-peroxide '2,5 -dimethyl Organic cross-linking after organic peroxides such as 2,5-bis (third-butyl peroxide) hexane, acetylene peroxide, etc., whose cross-linking degree is above 10%, generally only the average The particle size is in the range of 5 ~ 9 0, more preferably 10 ~ 6 0 / zm after calcination. 'The porous layer is obtained. The paper size applies the Chinese National Standard (CNS) A4 specification (210X297 mm) ----- ----- Installation ------ Order ------ line (please read the precautions on the back before filling out this page) -7-Printed by the Staff Consumer Cooperative of the Central Bureau of Standards, Ministry of Economic Affairs ^ 442 3 1 9 a? ___B7_____ V. Description of the Invention (5) There is no special limitation except for cross-linked polyolefin resin materials. "When the degree of cross-linking of hydrocarbon resin materials % To 1 billion, the crosslinked polyolefin-based resin material produced after heating, and therefore, melt flowability decreases when there is a reduction not produce the effect of crosslinking. Radiation-exposed crosslinks are less problematic than crosslinker residues than chemical crosslinks. The addition operation is less laborious and the crosslinking uniformity is better, but those who are less convenient must be given to special devices. In addition, the porous plastic filter is provided with a charge prevention property. Therefore, the surface of the porous plastic filter or the porous layer with a small pore diameter covered by the fusion can be coated such as: carbon black, carbon fiber, gold powder, gold tincture. The total amount of conductive agents such as potassium phthalate is in the range of 1 to 5% by weight. Generally, it can be added in an amount of 1 to 2%. The thermoplastic plastic material of the porous plastic filter with a single-layer structure of the invention is selected from the surface with a water contact angle of 60 degrees or more and a particle size of 5 jCtm ~ 9 0 jum, preferably 10 / zm ~ 60. μιη of the above-mentioned thermoplastic plastic materials 1 is even better, can choose ultra-high molecular weight polyethylene with an average particle size of 5 μηη ~ 9 0 / zm, or add and mix, such as: fluorine resin materials, crosslinked polyolefin resin materials, Those mixed with other thermoplastic plastic materials, or thermoplastic plastic materials with an average particle diameter of 5 to 90 Am, preferably ultra high molecular weight polyethylene with an average particle diameter of 5 to 90, and an average particle diameter of 9 0 or more The thermoplastic plastic material is preferably ultra-high molecular weight polyethylene with an average particle diameter of 9 0 // m or more. Β can be used as the ultra-high molecular weight polyethylene. The average molecular weight of the viscosity can be used as the paper size. Applicable to China National Standards (CNS) Α4 Specification (2) 0 × 297 mm) — One 8 One ------------------- 1T ------ ^ (Please read the first Please fill in this page again for attention) 442319 A7 Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs B7 V. invention is described in (6) - 1 million or more appropriate person. As fluorine resin materials, such as: polytetrafluoroethylene, polyfluoropropylene-based acrylate, polyvinylidene fluoride, polyvinylidene fluoride, hexafluoropropylene, etc. can be used, especially polytetrafluoroethylene Ethylene or polyfluoropropylene-based acrylates are non-adhesive to dust mustard particles, so they are better candidates. The mixing ratio of the fluorine-based resin material may be in a range of 0.01% to 50% by weight when the entire amount of the plastic material is used, and more preferably 1% to 30% by weight is most appropriate. When the mixing ratio of the fluorine-based resin material is less than 0.1% by weight, the shedding performance of collecting dust and mustard particles depends on the thermoplastic plastic material body which has a porous plastic filter, so the expected shedding performance cannot be obtained, otherwise it exceeds * Above 50% by weight, the strength of the porous plastic filter is obviously reduced after calcination, and there are frequent practical problems. Also, thermoplastic plastic materials with a particle size ranging from 5 cm to 90 am are added with thermoplastic plastic materials with a particle size above 90 / zm. For example, you can use 5 ~ 90 jtzm ultra-high molecular weight polyethylene mixed with ultra-high molecular weight polyethylene with a particle size of 1000 ~ 1, 00 yin, etc. 〇 Ultra high molecular weight polyethylene mixing ratio The particle diameter is in the range of 5 to 9 0 " m, and the total amount is 20% by weight or more, more preferably 40% by weight or more. A porous plastic filter with a multi-layer structure, that is, a porous plastic substrate and its surface are integrated to have at least one porous layer. The porous plastic substrate is formed by calcining particles of a thermoplastic plastic material with a larger average particle size. The size of this paper is in accordance with Chinese National Standard (CNS) A4 (210X297 mm) ί -4 n 111 I, 4 ϋ I n —i In ^ (Please read the precautions on the back before filling this page} -9 -Printed by the Consumers' Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs 442 3 1 9 A7 ____ B7 V. Description of the invention (7) For those who have a large pore size, the porous layer is a calcined crosslinked polyolefin system with a smaller average particle size When the resin material has a small pore size obtained after forming, the porous plastic substrate has low pressure loss and high strength. Those who make up their thermoplastic plastic materials can use the above-mentioned ultra-high molecular weight polyethylene and high-density polyethylene. Polyolefin resins such as polyethylene or polypropylene are generally selected as long as the average particle size is 100 jtzm ~ 1, preferably 0.000 // m is calcined in the range of 150 ~ 600. Thermoplastic material That is, there is no particular limitation except for those with a small MF R, specifically those with a porous plastic material layer obtained with a uniform pore size when using materials with a MF R of 0.001 or less are suitable, for example: average Those with a particle size of 100 / zm or more and 200 or less and a high density of 0.35 to 049g / cm3 in the shape of a grapevine have excellent mechanical strength. In addition, when the average particle size exceeds 1, In the case of OOOgrn, the mechanical strength of the porous plastic filter is insufficient, which is not ideal. On the contrary, when it is less than 100 / m, the meaning of the multi-layer porous plastic filter is weak. In addition, the coating is fused to the surface of the porous plastic substrate of the present invention. The porous layer is fine particles separated and filtered. Those who make up this crosslinked polyolefin smoke-based resin material can use polyethylene, polypropylene, etc. irradiated with the above-mentioned low density polyethylene, medium density polyethylene, high density polyethylene, etc. Ionizing radiation of polyolefin resin, or radiation crosslinking with cross-linking agent, or chemical crosslinking is suitable for use》 The characteristics of this multilayer porous plastic filter is the calcined thermoplastic plastic material The surface of the porous plastic substrate formed after the particles is covered with at least one layer of fusion. The paper size is applicable to the Chinese National Standard (CNS) Λ4 specification (210X297 mm) I ------------- ^ --- --- ΪΤ ------- # (Please read the precautions on the back before filling out this page) -10-The Central Laboratories of the Ministry of Economic Affairs, Shellfish Consumer Cooperatives, Yinfan 4423 1 9 at __B7 V. Description of Invention (8 ) Those with a different average particle size from this substrate, those with a porous layer of crosslinked polyolefin resin materials, preferably those with electrostatic coating, and then calcined and formed a composite layered structure. However, the porous plastic substrate is the one with a large pore diameter obtained by calcining the thermoplastic plastic material with a larger average particle diameter as described above, and the porous layer covered and fused on the surface of the porous plastic substrate is a small average particle diameter with the above average particle diameter. The crosslinked polyolefin-based resin material is preferably electrostatically coated and then calcined to obtain a small pore size. The thickness of the multi-layer porous plastic filter is composed of a porous plastic substrate with a large pore diameter. The thickness ratio of the multi-layer porous filter is preferably 30% to 100% of the thickness of the multi-layer porous filter. When the thickness ratio of the porous plastic substrate is less than 30%, the pressure loss will increase, which is not ideal for the performance of the filter. "For this layer of porous plastic filter, if the plastic substrate with a large pore size has a surface with If the small-pore porous layer covered with fusion is formed with a multilayer structure, the position and number of the covered fusion layers are not limited. After the average particle size changes according to the quality requirements, there can be two or more layers of covered fusion porous Stratum. The final shape of the porous plastic filter of the present invention can be selected according to its purpose to be a circular, elliptical, rectangular, polygonal, star-shaped hollow cylindrical body, a plate-like body, a rod-like body, a low-cylindrical body or a dish. Body and so on. In addition, its length does not matter whether it is long or short, as long as it meets the separation device described below. The shape of this filter is formed at least in the hollow cylindrical body wall (please read the precautions on the back before filling this page} This paper size is applicable to China National Standard (CNS) A4 specification (2 丨 〇 × 297 mm) -11-442319 A7 B7 Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs 5. Description of the invention (9) The filter of the folding part is vertical or It is appropriate to increase the filtering area at the same time as it is white and vertical. The folded part is formed by the intersection of the outer curved part located on the outer periphery of the cylindrical body and the inner curved part located on the inner periphery of the cylindrical body. Former 0 The formation of the folded part is determined by the outer diameter y of the outer curved part of the cylindrical body. The inner diameter 1 of the inner curved part. The thickness y varies according to the number of folds. 1. Generally, the outer diameter is selected as 2 0 1 50 mm »Inner diameter 1 2 1 2 0 mm > Thickness 15 mm Fold number 5 2 5 Better is 6 1 2 Mechanical strength of the filter of the kind of plastic material > Required The volume of the filter area separation device installation area is considered as 0. This fold is preferably formed across the whole or half of the cylindrical body wall. The fold is set vertically as shown in Figure 1 or 2 When it is inside the separation device, the directionality of the filter is Δτι m. The folded part is shown in Fig. 3. The half-circumferentially formed person removes the removed particles to Αττ *. M when the horizontal side is set in the separation device horizontally. The porous plastic filter of the invention is made by static molding or dynamic molding of particles of thermoplastic plastic material with a certain average particle size. Molding is the so-called in-mold calcination method. For example, if a cylindrical mold such as a mold with an inner surface shape and a mold with the same outer surface shape are inserted into the mold, i. The method of heating the forming mold at the same time as the inner part of the gap between the inner surface and the outer surface of the inner mold. 9 The paper size is applicable to China National Standards (CNS) specifications (2〗 0X297 mm) -12 _ 442319 Printed by the Employees' Cooperative of the China Standards Bureau of the Ministry of Economic Affairs. 5. Description of the invention. 10) The latter's dynamic forming method (1) uses the built-in temperature-adjustable cylinder built into the top part to return the moving piston ( (2) The piston extruder is used for piston extrusion. (2) The injection molding method is performed by using a pressure-injection molding machine with a temperature-adjustable cylindrical spiral built-in in the top part. 3) Extrusion molding using a screw extruder built into a cylinder with a temperature-adjustable cylinder at the tip section »(4) The raw material is formed by using a mold formed by a female model and a male model inserted into its inner warp section After filling in the groove formed in the female model > Compression molding method using a compression molding machine with a heating molding die (5) It is used at the top part-it can be used for the forming type composed of up and down moving belts or down moving belts The continuous press in which the raw material is extruded in the forming type in a cylinder whose temperature is adjusted is subjected to a continuous extrusion method, etc. According to the quality requirements of the final shape of the porous plastic filter of the present invention, T, the static forming may be appropriately selected. Cross-linked polyolefin-based tree with smaller average particle size calcined on the surface of porous plastic substrate The forming method of the porous layer of the multilayered plastic filter after the formation of the porous layer of the particles of the lipid material is the above-mentioned in-mold calcining method, electrostatic coating method, etc. The in-mold firing method is to use a previously formed porous plastic substrate. The outer diameter of the base material is filled in a gap provided in a cylindrical shape having a large-diameter inner diameter with a fixed amount, and then the particles of the cross-linked polyolefin resin material are filled in the gap. In this state, these are fixed at a fixed temperature Method for calcining and molding after heating for a fixed time. 〇In addition, when the porous plastic substrate is formed by in-mold firing method> After the continuous cross-linked polyolefin resin material particles are calcined and formed in the same manner as above, on a multi-paper scale Applicable to Chinese National Standard (CNS) A4 specification (2 丨 OX297 mm) -13-Printed by the Shellfish Consumer Cooperative of the Central Bureau of Standards of the Ministry of Economic Affairs 4 42 3 19 ΕΊ5. Description of the invention (11) Coating on porous plastic substrate Also integrated by fusing the porous layer. In addition, the electrostatic coating method is to spray the particles of the cross-linked polyolefin-based resin material from an externally-applied high-voltage fuel nozzle, and then apply the electrostatic coating method to first attach conductivity to a porous plastic having a fixed pore size. On the surface of the substrate. In addition, when the conductivity is attached to the formed porous plastic substrate, the method of mixing the above conductive agents such as carbon black, carbon fiber, gold powder, etc. into the substrate, or on the surface of the formed porous plastic substrate The method of coating the surfactant and the like may be any one as long as it is conductive on the surface of the porous plastic, and the rest are not particularly limited. Next, the cross-linked polyolefin based on the high-voltage fuel injector and the surface of the porous plastic substrate have mutual solubility and are smaller than the average particle diameter of the plastic material particles of the porous plastic substrate. After the resin material particles are sprayed out, this electrostatic coating is applied to the surface of the porous plastic substrate to cover the synthetic β, and then the porous plastic substrate coated with the crosslinked polyolefin-based resin material particles is placed at a fixed temperature. After heating in a heating furnace, while calcining and forming | on the surface of porous plastic materials》 Among them, the method of irradiating radiation with a polyolefin resin material is cross-linking. The material to be irradiated is enclosed in a fixed radiation irradiation device. In the atmospheric pressure of the material to be irradiated, at room temperature, cobalt 60 is used as the line source. Since the fixed line amount (Gy) is irradiated for a fixed time, radiation cross-linking with a desired degree of cross-linking can be obtained. Polyolefin resin material. In addition, each layer of the porous multi-layer plastic filter is composed of the same plastic material, and the condition is excellent during molding, and the adhesion between the layers is also good. This paper size applies to Chinese National Standard {CNS) A4 specification (2IOX297 mm > ： —: nil ~ * i ^ n ϋ n (Please read the notes on the back before filling this page) -14-Central Bureau of Standards, Ministry of Economic Affairs Printed by Bei Gong Consumer Cooperative Co., Ltd. 442 31 9 μ ____B7 V. Description of the invention (12) The porous plastic filters obtained above are generally based on the filter device Ϊ, as shown in Figure 4, and this is fixed vertically or horizontally. The shape of the separation device is used as a separation device after being operated with a container suspension. The filter device 1 shown in Fig. 4 is a porous plastic filter 2 mounted on a slightly plate-shaped wearing body 3, and one of the plastic filters is The top 4 is inserted into the hole-wearing body 3 and then fixed by a cover 5 that is closed by the opening at the other top. The body and the cover are made of metal or various synthetic resins such as rigid polyolefin. Resins, thermoplastic resins such as polyvinyl chloride, reactive thermosetting resins, etc., among them, the reactive liquid polyurethane resins are better in terms of molding processability and dimensional stability. Also, when this Filter device must be attached In the case of conductivity, when a calcined porous plastic filter is formed, a conductive agent is added to make the conductivity adhere to the filter, and the wearing body and the cover body can also use a conductive material such as carbon black to add a conductive agent. When using reactive liquid polyurethane resin as the main agent, the polyol and the hardener are added with 3 to 10 weight percent of the average fiber length of 0.1 to 1.0 mm carbon fiber, which has both high residual deformation and low size. Those who have precision and antistatic performance are ideal. [Examples] The present invention will be described in detail in the following examples. [Experiment No. 1 ~ No. 4] ---------- see ---- --tr ------ ^ {Please read the notes on the back before filling in this page) The paper size applies to the Chinese National Standard (CNS) A4 specification (2ί〇 × 297 mm) -15-

Central Consumers Bureau of the Ministry of Economic Affairs

"4 423 19 a? B7 V. Description of the invention (13) The performance of the porous plastic filter manufactured by the following content was evaluated or measured by the method shown below, and the results are shown in Table 1. [Presence or absence of particles falling out] When the particles fall back by elution, the presence or absence of particles falling out of the filter is evaluated visually. That is, the case where the filter particles do not fall off is (0), the filter particles fall off slightly (△), and the filter particles fall off significantly (X). However, the filter particles are all filter particles containing a porous layer composed of a cross-linked polyolefin-based resin material after the integration of the secondary shedding coating and integration. [Particulate collection performance] When eluted back down | Evaluate visually whether or not the removed particles are mixed into the fluid outflow side. That is, when no particles are mixed, it is (0), when the mixed particles appear slightly, it is (△), and when the mixed particles are obvious, it is (X ----------- ^ ------ -Order: ------ M (Please read the precautions on the back before filling in this page) [Powder shedding property] When the particles are eluted back, visually evaluate the particles attached to the surface of the furnace on the outflow side of the fluid ( (Powder) shedding condition. That is, the fine particles (powder) fall off very well (◎), the fine particles (powder) fall off (尙), the fine particles (powder) fall off poorly (△ ), The particles that fall off quite badly are (X) · This paper size applies the Chinese National Standard (CNS) Α4 specification (210 × 2ί > 7 mm) -16-442 3 1 9 A7 _ B7 Employees ’cooperation with the Central Standards Bureau of the Ministry of Economic Affairs Du Yin 褽 5. Description of the invention (14) [Pressure loss / mmA q] After measuring the pressure loss on the inflow side and the outflow side when lm / mi η is used to attract air without particulates, the water column mm is used as the value. Contact angle / degree] Using a goniometer-type contact angle measuring device (type G-I manufactured by El umer) After measuring the ion exchange water droplets of 20 AP into the calcined plastic surface of the inflow side, measure the contact angle. The expressed value is degree 0 [surface resistance rate (Ω)] on the surface of the filter at a distance of 5 Omm. Omm copper electrode with surface resistance (Ω) when DC voltage of 5 0 V is applied 〇 [Experiment N 〇. 1] Prepare one inner shape with a cylindrical outer surface and one inner shape with a cylindrical inner surface The outer surface shape is used as the forming mold. The outer diameter of the inner shape is 2 mm smaller than the outer diameter of the outer shape. First, insert the inner shape into the outer shape to form a 2 mm gap between the outer shape and the inner shape. The gap is filled with ultra-high molecular weight polyethylene (MF R = 0.01 or less) with an average particle size of 30 // m and a molecular weight of 2 million. This is placed in a heating furnace at a temperature of 160 to 220 ° C. After heating for 30 ~ 90 minutes, it is calcined to obtain a hollow plastic filter with a thickness of 2mm. (Please read the precautions on the back before filling out this page.) The paper size applies to Chinese National Standard (CNS) A4 Specifications (210X297 mm) -17-4423 1 9 A7 Printed by the Consumers' Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs Preparation B7 V. Description of the Invention (Experiment N 0.2) One inner shape with a cylindrical outer surface and one outer shape with a cylindrical inner surface were prepared as forming molds. The diameter is 3 mm smaller than the inner diameter of the outer shape. First, insert the inner shape into the outer shape to form a uniform 3mm gap between the outer shape and the inner shape. Then, fill the gap with an average particle size of 30. Ultra-high molecular weight polyethylene with a molecular weight of 4 million (MFR = 0.01 or less), this is placed at a temperature of 160 to 220 °. After heating in a heating furnace for 30 to 90 minutes, it was calcined to obtain a hollow plastic filter with a thickness of 3 mm. [Experiment No. 0.3] After using the same forming mold as in Experiment No. 2, the gap between the forming molds was filled with 2.0% by weight of carbon black, and the average particle diameter was 30 and the molecular weight was mixed. 4 million ultra-high molecular weight polyethylene (MFR = 0.01 or less), put this in a heating furnace with a temperature of 160 ~ 220 ° C for 30 ~ 90 minutes, and then calcined to obtain a thickness of 3mm Porous plastic filter in the shape of a hollow cylinder "[Experiment No. 0.4] After using the same forming mold as in Experiment No. 1, 'fill the gap between the forming mold with an average particle diameter of 3 0' and a molecular weight of 2 million Ultra-high molecular weight polyethylene (MFR = 0.01 or less) 'Put this in a heating furnace at a temperature of 160 ~ 220 ° C and heat it for 30 ~ 90 minutes after I.------ ------- ^ ------ tr ------ 0 (Please read the note on the back before filling this page) This paper size is applicable to China National Standard (CNS) A4 specification (210X297 Mm} -18-Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs A7 B7 V. Description of the invention (16) After calcining and forming, the porous plastic cylinder after calcining and forming is made from the forming mold After exiting * After coating the surface of the cylinder with a surfactant, a hollow plastic filter with a thickness of 2 mm was obtained. [Experiment N 〇-5] After using the molding mold of Experiment No. 1, The gap of the forming mold is filled with an ultra-high molecular weight polyethylene having an average particle size of 170 and a molecular weight of 400,000 (MFR = 0.01 or less). This is heated in a heating furnace at a temperature of 160 to 220 ° C for 30 to 90 hours. Minutes later, after the calcination and shaping, the porous plastic cylindrical body after the calcination and shaping was taken out from the forming mold, and the average particle diameter of 0.1 #m of P TF E fine particles was simultaneously sprayed on the surface of the cylindrical body. 10 ~ After coating with a thickness of 20 mm, a porous plastic filter having a hollow cylindrical shape with a thickness of 2 mm was obtained. [Experiment N 0.6] After using the molding mold of Experiment No. 2, the gap was filled in the molding mold. Ultra-high molecular weight polyethylene (MFR = 0.001 or less) with an average particle size of 110 Mm and a molecular weight of 200,000. This is heated in a heating furnace at a temperature of 160 to 220 ° C for 30 minutes. ~ 90 minutes after calcination and molding * obtain a hollow cylindrical porous plastic filter with a thickness of 3 mm 》 ［Experiment N 〇 · 7］ After using the forming mold of Experiment No. 2, the forming mold 442319! ------------ Private ------ Order-- ---- Silk (please read the precautions on the back before filling this page) This paper size applies to China National Standard (CNS) A4 specification (2! 0X297 mm) -19-442319-V. Description of the invention (17 ) The gap is filled with an ultra-high molecular weight polyethylene (MFR = 0.001 or less) with an average particle size of 170 lm '200 MW, and this is placed at a temperature of 1500 to 2000 ° C After heating in a heating furnace for 60 minutes, it was calcined to obtain a hollow plastic filter with a thickness of 3 mm. As shown in Table 1, in No. 1, 2, and 3, there are no particles falling out of the particles mixed with the fluid outflow side, no powder falling out, and no pressure loss, etc. "and No. 3 with carbon black added, its surface Low resistance is ideally required to have a filter with antistatic properties. However, No. 4 has a problem of powder falling off, and No. 5 has problems such as the P T F E particles falling off from the substrate, and particles mixed in the fluid outflow side. „^, 1T silk {Please read the precautions on the back before filling out this page) Printed by the Central Consumer Standards Bureau of the Ministry of Economic Affairs, Printed by the Consumer Cooperatives, this paper size is applicable to the Chinese national standard {CNS) Α4 size (210 × 29? Mm)- 20-Printed by Shellfish Consumer Cooperative, Central Standards Bureau, Ministry of Economic Affairs, 4323 彳 9 V. Description of the invention (18) Table 1 Experiment No. 1 2 3 Particles fall off, whether or not the particles are collected, and the performance of the powder falls off. 〇Pressure loss 70 48 50 (mm A q) 9 7 9 7 9 5 angle (degree) to water contact 1016 10 rate (Ω) No. 6 and No. 7 are also a problem, No. 4 ~ No. [Experiment No. 8 to No. 1 After evaluation or measurement by the method manufactured in the following, the average particle size of the knot using the gap obtained in Experiment No. 1 was 40. Molecular weight polyethylene (MFR = 〇A7 B7 4 5 6 7 〇X 〇〇〇Δ △ XX 〇〇〇70 20 40 8 50 122 95 97 The particles 7 mixed with the outflow side of the fluid have disadvantages in performance. 2] The performance of the porous plastic filter is shown by the above results. Table 2. After forming the mold, the m Super high of 2 million. Below 0 1) and average particle size This paper size is applicable to China National Standard (CNS) A4 specification (210 X 297 mm) ^^ 1 ^^ 1 > ---- II Γ—------1 ......---- .....— j- ·-㈡-. 一 .. I ---- (Please read the precautions on the back before (Fill in this page) -21-A7 442319 ___B7 V. Description of the invention (l9) 1 50, molecular weight 4 million ultra high molecular weight polyethylene (MFR-0.001 or less) after mixing in the ratio shown in Table 2 After the composition, this was placed in a heating furnace at a temperature of 160 to 200 ° C for 30 to 90 minutes, and then calcined to obtain a hollow plastic filter with a thickness of 2 mm in a hollow cylindrical shape. Table 2 Experiment No. 8 9 10 11 12 Mixed cutting 40 kernel m / 150 kernel m 80/20 50/50 30/70 20/80 10/90 Whether particles fall off or not Body shedding 〇〇〇〇 △ Pressure loss (mmAq) 68 44 35 24 15 Contact angle to water (degrees) 97 96 95 95 95 As shown in Table 2, N 〇8 ～ N 〇. 1 2 No particles fall off and powder Body fall problems are ideal. In addition, although the pressure loss No. 8 is too high, it does not cause practical problems. However, the proportion of plastic materials with a small average particle size in No. 12 is low, and the phenomenon of fine particles mixed into the fluid outflow side is not ideal. [Experiment No.13 ~ No.15] This paper size is applicable to Chinese national standards (CNS > A4 size (210X297mm) = ------ 1T ------ 0 C Please read the back first Please pay attention to this page, please fill in this page) Printed by the Consumers 'Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs-22-Printed by the Zou Central Standards Bureau, Shellfish Consumers' Cooperatives "442319 V. Description of the Invention (20) Manufacture the porous plastic obtained as follows The performance of the filter was evaluated and determined by the method shown above. The results are shown in Table 3. [Experiment N 0.13] After using the molding die of Experiment No. 1, average gaps were filled in the gaps of the molding die. The diameter is 0, the molecular weight is 2 million ultra-high molecular weight polyethylene (MFR = 0, 0.01 or less) and the PTFE powder with an average particle size of 0.2 / zm is ultra-high molecular weight polyethylene in the overall mixing ratio. It is 95% by weight and the PTFE powder is 5% by weight of the mixed composition. This is placed in a heating furnace at a temperature of 160 to 220 ° C, and heated to 30 to 90 minutes for calcination to obtain Porous plastic filter in the shape of a hollow cylinder with a thickness of 2mm. [Experiment N 〇. 14] Use Experiment No.1 After the forming mold, the gap between the forming mold is filled with ultra-high molecular weight polyethylene (MFR = 0.01 or less) having an average particle diameter of 30 and a molecular weight of 200,000 and a polyfluoroalkane acrylate dissolved in a solvent. The mixing ratio is 99% by weight of the ultra-high molecular weight polyethylene and 1% by weight of the polyfluoroalkane acrylate when the total amount is mixed. This is placed at a temperature of 160 to 220 ° C. After heating in a heating furnace for 30 to 90 minutes, a hollow cylindrical porous plastic filter having a thickness of 2 mm was obtained after calcining and forming. [Experiment N 0.15] ---; -------'-- ---- ir ------ Food (please read the notes on the back before filling this page) This paper size applies to Chinese National Standard (CNS) A4 (210X297 mm) -23-Central Bureau of Standards, Ministry of Economic Affairs Employee Consumer Cooperative Co., Ltd. f 4 4 2 3 19 A7 _B7__ V. Description of the Invention (21) After using the molding die of Experiment No. 1 'fill the gap of the molding die' with an average particle diameter of 3 0 'Molecular weight 2 0 0 million ultra-high molecular weight polyethylene (MFR = 0.01 or less) 'is heated in a heating furnace at a temperature of 16 0 ~ 2 2 0 ° C for 3 0 ~ 9 0 After being calcined for one minute, a porous plastic reducer having a hollow cylindrical shape with a thickness of 2 mm was obtained. As shown in Table 3, no problems such as no particles falling out in Nos. 13 and 14 and powder falling were evaluated. The value of the contact angle with water for performance 1 is also the larger. Although the reason for not dropping PTFE particles in No. 13 has not been explained so far, there are some PTFE particles in the mold during the "melt expansion of ultra-high molecular weight polyethylene". It is an understandable part embedded in the ultra-high molecular weight polyethylene particles. * ----------- > 4 ------ IrJ ------, # (please first Read the note on the back of the page and fill in this page) Table 3 Experiment N 〇 13 13 15 Presence or absence of particle shedding 〇 00 Particle collection performance ◎ Powder shedding ◎ ◎ 〇 Pressure loss (mmAq) 60 61 70 For water Contact angle (degrees) 120 115 97

The reason why the polyfluoroalkane acrylate in No. 14 does not fall off is that the paper size after heating is applicable to the Chinese National Standard (CNS) A4 specification {210X 297 mm) ~ '-24-442 3 1 9 Cooperative printed _____B7__ 5. Description of the invention (22), the side of the ultra-high molecular weight polyethylene particles is oleophilic, and the surface side is caused by the alignment of a fluorine-based compound. The performance of No. 13 and No. 14 of fluorine-containing plastic materials is better than that of No. 15 of fluorine-free resin materials. In addition, the pressure loss No. 13 ~ 15 have no practical problems. [Experiment No. 16 ~ No. 21] The performance of the porous plastic filter manufactured by the following content is evaluated or measured after the above method. The results are shown.于 表 4。 In Table 4. [Experiment No. 16] One inner shape with a cylindrical outer surface and two outer shapes with a cylindrical inner surface were prepared as forming dies. The outer diameter is 2 mm and 3 mm larger than the inner diameter. First, insert the inner shape into the outer shape with a smaller inner diameter, and form a uniform gap of 2 mm between the outer shape and the inner shape. The gap is filled with ultra-high molecular weight polyethylene particles with an average particle size of 160 itim and a molecular weight of 400,000 (MFR = 0.001 or less), and this is placed in a heating furnace at a temperature of 160 to 200 ° C. After heating for 60 minutes in the interior, it was calcined to obtain a hollow cylindrical porous plastic substrate with a thickness of 2 mm and a large pore diameter. Next, the porous plastic substrate with the outer shape remaining on the outside was removed from its outer shape, and this was removed. Insert into a larger inner shape and make a uniform 1 mm gap between the surface of the substrate and its shape. Then fill the secondary gap with an average particle diameter of 26 // m low density polyethylene and irradiate 200KGy r line. This paper size applies to China National Standard (CNS) A4 specifications (210X297 mm > A7-, 1ΓI ^ (Please read the notes on the back before filling this page) -25-442 3 1 9 A7 B7 Central Bureau of Standards, Ministry of Economic Affairs Printed by Pui Gong Consumer Cooperative 5. After the invention description (23), the cross-linked polyethylene particles with a cross-linking degree of 7 7% (MFR = less than 0.01) are placed at a temperature of 16 0 ~ 2 After heating in a heating furnace at 20 ° C for 30 minutes, after calcining and forming, the outer side of the substrate is the fluid A porous layer with a smaller pore size was formed on the entrance side, and a two-layer porous plastic filter having a cylindrical shape with a thickness of 3 mm was obtained. [Experimental No. 17] After using the molding die of Experiment No. 1, it was used for molding. The gaps between the molds are filled with ultra-high molecular weight polyethylene (MFR = 0.001 or less) with an average particle size of 170 and a molecular weight of 400,000, and it is heated in a heating furnace at 150 to 2000 ° C for 60 minutes. The hollow plastic filter with a thickness of 3 mm was obtained by calcining and forming. After the surface of the porous plastic substrate was coated with a surfactant, the conductive material was attached to the surface of the substrate, and the experiment No. 16 In the same way, the cross-linking polyethylene particles obtained by irradiating 200KGy ray of low-density polyethylene with an average particle diameter of 26em are 7 7% (MFR = 〇, 〇1 or less). 0 KV, atomizing air pressure 1. 5 kg / cm2, after electrostatic coating, the surface of the substrate is coated with cross-linked polyethylene particles with a thickness of 70 wm. This is also placed at 15 0 ~ 2 0 0 After heating in a heating furnace for 30 minutes, after calcining and forming, the outer layer side of the substrate, that is, the fluid inflow side is formed. After the porous layer with a pore size, a two-layer porous plastic filter with a medium thickness of 3 mm in a cylindrical shape is obtained. The Λ sheet size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm) I ----- ----- Knowledge ------------ M (Please read the notes on the back before filling out this page) -26-Printed by Shellfisher Consumer Cooperative, Central Bureau of Standards, Ministry of Economic Affairs 42 3 1 9 at B7 V. Description of the invention (24) [Experiment N 〇. 18] After using the molding die of Experiment No. 2, fill the gap of the molding die with an average particle diameter of 1 70ym and an ultra-high molecular weight of 4 million. Molecular weight polyethylene (MFR = 0. 01 or less) 'Placed in a heating furnace at a temperature of 150 to 200 ° C for 60 minutes and then calcined to obtain a hollow plastic filter with a thickness of 3 mm. . After applying a surfactant on the surface of this porous plastic material, after attaching conductivity to the surface of its substrate, low density polyethylene particles with an average particle size of 26 before irradiation with radiation were tested in the same manner as in Experiment No. 17. Using an automatic electric coating machine, after electrostatic coating using a voltage of 60 KV and an atomizing air pressure of 1.5 kg / cm 2, low-density polyethylene particles of 2 6 / zm were coated and synthesized. This was placed in a heating furnace at 150 ~ 200 ° C for 30 minutes, and then calcined to obtain a two-layer porous plastic filter with a cylindrical shape with a thickness of 3 mm. [Experimental N. 19] When the top part obtains the final porous plastic filter with a thickness of 3mm, a piston extruder with a cylindrical opening with a gap must be provided. After use, put the average particle size into the box of this extruder. 3 4 0, ultra-high molecular weight polyethylene with a molecular weight of 60,000 (MFR = 0.01 or less). After extrusion under fixed extrusion conditions, a 3 mm-thick hollow cylindrical porous plastic substrate with a larger pore diameter is obtained after extrusion. material. After coating the surface of this porous plastic substrate with a surfactant, the attached paper is sized to the Chinese National Standard (CNS) A4 (210 X 297 mm) ^ ------------ -^-{Please read the precautions on the back before filling out this page) ΐτ Μ -27-A7 B7 442 3 1 9 V. Description of the invention (25) and conductivity on the surface of the substrate, and experiment N 0. 1 In the same way, cross-linked polyethylene particles with a degree of cross-linking of 77% (MFR = 0.01 or less) obtained after irradiating 20 OKGy's r-rays to low-density polyethylene with an average particle size of 26 are the same as Experiment No. 17 An automatic electrostatic coating machine was used for electrostatic coating with a voltage of 60KV and an atomizing air pressure of 1.5 kg / cm 2, and then a crosslinked polyethylene particle having a thickness of 200 M m was coated on the surface of the substrate β more This was placed in a heating furnace at 150 ~ 200 ° C for 30 minutes, and then calcined to form a porous layer with a smaller pore size on the outer layer side of the substrate, that is, the fluid inflow side. 2 layer porous plastic filter in 3 mm cylindrical shape. [Experimental N. 20] After using the molding die of Experiment No. 1, the gap between the molding die was filled with ultra-high molecular weight polyethylene having an average particle diameter of 160 and a molecular weight of 4 million (MFR = 0. 01 or less), and then heated in a heating furnace at 160 to 220 ° C for 30 minutes to obtain a hollow plastic filter with a thickness of 3 mm after calcining and forming. The porous plastic substrate is coated with a surfactant and then electrically conductive on the surface of the substrate, and then 10 OKGy r rays are irradiated to the low-density polyethylene having an average particle diameter of 10 / zm. Cross-linked polyethylene particles with a cross-linking degree of 5 4% (MFR = 〇. 〇1 or less) were subjected to electrostatic coating with an automatic electrostatic coating machine using a voltage of 60 KV and an atomizing air pressure of 1.5 kg / cm 2 to make electrostatic coating, so that Cross-linked polyethylene particles with a thickness of 100 μm cover this paper. The size of this paper is applicable to China National Standard (CNS) A4 (210X297 mm) Ί. „^ (Please read the precautions on the back before filling this page)- *

M Shellfish consumer cooperation of the Central Standards Bureau of the Ministry of Economic Affairs Du Yinpu Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs ft 442 3 1 9 A7 * B7 Five 'Invention description (26) is formed on the surface of the substrate. This was placed in a heating furnace at 150 ~ 200 ° C for 30 minutes, and then calcined to form a porous layer with a smaller pore size on the outer layer side of the substrate, that is, the fluid inflow side, to obtain a full thickness of 3 mm. A two-layer porous plastic filter in the shape of a medium cylinder. [Experiment N 〇. 21] After using the molding mold of Experiment No. 1, 'the gap between the molding mold was filled with ultra-high molecular weight polyethylene having an average particle diameter of 160 / xm and a molecular weight of 4 million (MFR = 0. 0 1 or less) 'Put into a heating furnace at 160 ~ 220 ° C for 30 minutes and calcined to obtain a hollow plastic filter with a thickness of 3 mm. After applying a surfactant on the surface of this porous plastic substrate, after attaching conductivity to the surface of the substrate, it will irradiate 5 OKGy's r line to low density polyethylene with an average particle diameter of 10. Cross-linked polyethylene particles with a degree of 4 3% (MFR = 0.001 or less) were subjected to electrostatic coating with an automatic electrostatic coating machine using a voltage of 60 KV and an atomizing air pressure of 1.5 kg / c m2. The surface of the substrate is coated with crosslinked polyethylene particles having a thickness of 90. In addition, this was placed in a heating furnace at 150 ~ 200 ° C for 30 minutes. After calcining and forming, a porous layer with a smaller pore size was formed on the outer layer side of the substrate, that is, the fluid inflow side. Two-layer porous plastic filter in a cylindrical shape with a full thickness of 3 mm. As shown in Table 4, the size & size of the cross-linked plastic material with small average particle size is applicable to the Chinese National Standard (CNS) A4 specification (210X297 mm): --------, 4-- ---- Order ------ Silk {Please read the notes on the back before filling in this page) -29-A7 B7 442 3 1 9 V. Description of the invention (27)

In No. 16,17, there is no fine particles mixed with particles falling off or fluid outflow side, and it has excellent filter performance. And the pressure loss is in good condition.

In No. 18, the surface of the porous plastic substrate is covered with a synthetic low-density polyethylene full film, so it cannot be a fixed porous filter. Change the average particle size, in No. 10 ~ 20 of the electrostatic coating conditions, there are no particles falling off, no particles on the side of the fluid outflow, and no powder dropping properties. Loss of the powder, and the contact angle of the powder to the water is small without any problems. Table 4 Experiment No. 16 17 18 19 20 21 Particles shedding 00 No holes 00 With or without energy microparticles collection 00 Filtering performance performance Shedding of powder powders Determination of pressure loss (mnAq) ) 45 13 9 9 21 Contact angle to water (degrees) 93 94 more 95 93 93 [Experiment No. 22 ~ No. 26] The performance of the porous plastic filter manufactured by the following is evaluated or measured as follows: The results are shown in Table 5. This paper size applies Chinese National Standard (CNS) A4 specification (210X297mm) „„ 4 ------ ίτ _------. ^ (Please read the note on the back before filling this page) Economy Printed by the Consumer Standards Cooperative of the Central Standards Bureau of the Ministry of Education-30-Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs, Printing and Printing A7 B7 V. Invention Description (28) [Experiment N 〇22] After using the mold for forming No. 2 * Fill the gap with ultra-high molecular weight polyethylene (MFR = 0.01 or less) with an average particle size of 170 Mm and a molecular weight of 400,000, and place this into 150 ~ 200. (: Heated in a heating furnace for 60 minutes and calcined to obtain a 3 mm hollow cylindrical porous plastic substrate with a larger pore diameter. After coating the surface of this porous plastic substrate with a surfactant, attach After conducting electricity on the surface of the substrate, as in Experiment No. 7, the ultra-high molecular weight polyethylene (MFR = 0.001 or less) with an average particle diameter of 30 jum and a molecular weight of 200,000 was automatically electrostatically charged. After the coating machine is electrostatically coated with a voltage of 60KV and atomized air of 1.5 kg / cm 2, the surface of the substrate is coated with ultra-high molecular weight polyethylene particles with a thickness of 2 0 0. This is also placed in 1 5 After heating in a heating furnace at 0 to 2 0 ° C for 30 minutes and calcining and forming, a porous layer with a small pore size is formed on the outer layer side of the substrate, that is, the fluid inflow side, and then a medium cylinder with a full thickness of 3 mm is obtained. Shaped two-layer porous plastic filter " [Experiment No. 23] The same method as Experiment No. 19 provided the piston with a lid with a cylindrical opening necessary to obtain the final porous plastic filter at the center 3 mm thick After using the extruder, put the average particle size into the box of the extruder 340Wm, ultra-high molecular weight polyethylene with a molecular weight of 6 million (MFR = 〇. 〇1 or less), extruded to a larger 1 '442 3 1 9 under fixed extrusion conditions: ---: ------- V ------------. t (Please read the notes on the back before filling out this page) This paper size is applicable to China National Standard (CNS) A4 specification (2i〇X 297 mm) -31- Department of Economics, Central Bureau of Standards, Department of Printing, Consumer Cooperatives 442 3 1 9 A7 B7 V. Description of the Invention (29) Hollow cylindrical porous plastic substrate with a pore thickness of 3 mm. Then use this porous plastic substrate with In experiment No.17, the electrostatic coating was performed in the same way with an automatic electrostatic coating machine using a voltage of 60 KV and an atomizing air pressure of 1.5 kg / c m2, and the average particle size on the surface of the substrate was 30 m. After 2 million ultra-high molecular weight polyethylene (MFR = 0.01 or less) is subjected to electrostatic coating, ultra-high molecular weight polyethylene particles having a thickness of 200 vm are coated on the surface of the substrate. This is also placed into 1 50 ~ It is heated in a heating furnace at 200 ° C for 30 minutes. After calcining and forming, a porous layer with a small pore size is formed on the outer layer side of the substrate, that is, the fluid inflow side. Two-layer porous plastic filter in the shape of a cylinder with a thickness of 3 mm. [Experimental No. 24] After using the forming mold of Experiment No. 2, the gap between the forming molds was filled with an average particle diameter of 17 °. Ultra-high molecular weight polyethylene with a molecular weight of 200,000 (MFR = 0, 01 or less), put this in a heating furnace at i 5 0 to 2 0 ° C and heat for 60 minutes after calcining and forming * to obtain a thickness of 3 mm Hollow cylindrical porous plastic filter. As shown in Table 5, in No. 22, No. 23 of the plastic material having a small average particle size of the electrostatic coating, there is no problem that the mixed particles fall off and the problem of fine particles on the side of the fluid outflow is excellent as a filter. In addition, the pressure loss of Nos. 22 and 23 is a good case. However, No. 24 has particles mixed in the outflow side of the fluid. Therefore, there are practical problems. ; ---- „------- ^ — (Please read the back of the note ^ before filling this page) The size of the paper is applicable to the Chinese National Standard (CNS) A4 (210X297 mm) -32 -Printed by the Consumer Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs Γ 442 3 19 Α7 ___B7 V. Description of the invention (3〇) Table 5 Experiment N 〇. 22 23 24 Whether particles fall off 〇〇〇 Particle collection performance 〇〇X Powder off Dropability 0.00 Pressure loss (mmAq) 9 9 8 Contact angle to water (degrees) 95 95 97 [Experiment No. 25 to No. 27] After manufacturing each filter from the following, it was evaluated as the performance of the filter as follows: After evaluation, the results are shown in Table 6. [Experiment No. 〇25] As shown in Figure 1, there are 1 star-shaped outer surface and 8 star-shaped inner surfaces outside the wall. The shape is used as a forming mold. The inside diameter is 3 mm smaller than the outside diameter. First insert the inside shape into the outside shape to form a 3mm gap between the outside shape and the inside shape. Then fill the gap with an average Ultra-high molecular weight polyethylene with a particle size of 30 jam and a molecular weight of 200,000 (MFR = 0.01 or less) Place it in a heating furnace at 160 ~ 220 ° C for 30 ~ 90 minutes. After calcining and forming, a 'hollow star shape porous plastic filter with a thickness of 3 mm is obtained. This paper size applies to Chinese National Standard (CNS) A4 Specifications (210X29? Mm) _ 33 IIII —_ II — " 1 II ___ — Order IM (please read the precautions on the back before filling out this page), 442 3 1 9 A7 B7 Staff Consumption of Central Bureau of Standards, Ministry of Economic Affairs Cooperative printed bag 5. Description of the invention (31) [Experiment N 〇. 26] After using the molding die of Experiment No. 1, 'fill the gap of the molding die with an average particle diameter of 30 Am and a molecular weight of 200,000. Ultra-high molecular weight polyethylene (MFR = 0.01 or less) 'This was placed in a heating furnace at 160 ~ 220 ° C for 30 ~ 90 minutes and calcined to obtain a hollow cylinder with a thickness of 3 mm. Porous plastic filter. [Experimental No. 27] Prepare an inner shape with a star-shaped outer surface with 8 folds around the wall as shown in Fig. 1 and an outer shape with a star-shaped inner surface and an outer mold. . Whose inner diameter is 2mm smaller than the outer diameter. ”First, insert the inner shape into the outer shape to make the outer shape smaller. A gap of 2 inm is formed between the inner mold and the gap. The ultra-high molecular weight polyethylene (MFR = 0.01 or less) with an average particle diameter of 30 and a molecular weight of 200,000 is filled into the gap. After heating in a heating furnace for 30 to 90 minutes, a hollow plastic star-shaped porous plastic filter with a thickness of 2 mm was obtained after calcination. As shown in Table 6, the particles mixed in No. 25, 26, and 27 fall off, and the fine particles on the outflow side of the fluid, even the powder dropping performance, pressure loss, etc. are all good. In addition, the hollow star shaped No. 25 and 27 have a larger filtration area per unit volume than the hollow cylindrical No. 26. Therefore, the filtration capacity, device capacity, and installation area of the separation device can be easily selected. And the design and construction is also good》 ---- „------- A-- (Please read the precautions on the back before filling this page) Order-food_ This paper size applies to China National Standard (CNS) Α4 Appearance (210 × 297 mm) -34-442 3 1 9 a? _B7 V. Description of the invention (32) Table 6 Experiment No. 25 26 27 Whether the particles fall off or not Particle collection performance of particles 〇〇 Pressure loss (ramAq) 69 86 58 Contact angle to water (degrees) 95 97 97 Filter area ratio per unit volume 1.5 1. 1.0 1.5 [Experiment N 0.2 8 to No -32] Porous material obtained by the following production The performance of the plastic filter was evaluated and measured by the above method, and the results are shown in Table 7 ^ After using the forming mold of Experiment N 0.27, the forming mold was used: ---: ------- , 4 ------ Order-^ ------ Food (please read the note on the back before filling this page) Central Standards of the Ministry of Economic Affairs The gap between the printing tools of the employee's consumer cooperative is filled with ultra-high molecular weight polyethylene (MFR = 0.01 or less) with an average particle size of 40 μm and a molecular weight of 2 million, and an ultra-high molecular weight with an average particle size of 150 and a molecular weight of 400,000. A composition in which polyethylene (MFR = 0.01 or less) is mixed at a ratio (% by weight) shown in Table 7, and this is placed in a heating furnace at 16 0 to 2 2 0 ° C and heated to 3 0 to 9 0 After a minute burn-in forming, a porous plastic filter having a hollow star shape with a thickness of 2 mm was obtained. As shown in Table 7, particles No. 28 to No. 32 fell off, and the powder fell out. Loss of N 〇. This paper size applies to Chinese National Standard (CNS) A4 (210X297 mm) -35-r 442 3 1 9 A 7 ΒΊ__ 5. Description of the invention (33) 2 8 Although higher, there is no practical problem β However, the proportion of plastic materials with a small average particle size in No. 23 is low, and the number of particles mixed into the fluid outflow side is not ideal. Table 7 Experiment No. 28 29 30 31 32 Mixing ratio 80/20 50/50 30/70 20 / 80 10/90 4〇Ai m / 15〇jii m Whether particles fall off 〇〇〇〇Δ Powder dropping property 10000 Pressure loss (mmAq) 55 35 28 20 10 Contact angle to water (degrees) 97 96 95 95 95 [Experiment No. 33 ~ No. 34] From the following The performance of the porous plastic filter obtained after manufacturing was evaluated and measured after the above method, and the results are shown in Table 8. [Experiment N 0.33] After using the molding die of Experiment No. 27, the gap between the molding die was filled with an ultra-high molecular weight polyethylene having an average particle size of 30 vm and a molecular weight of 2 million (MFR = 0. Less than 0 1) and PTFE powder with an average particle size of 0.2 / im is used as the mixing ratio of the ultra-high paper size for the full amount. The Chinese standard (CNS) A4 specification (2! 0 × 297 mm) (please first) (Please read the notes on the back of the book and fill in this page again.) Order printed by the Consumers Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs -36-Printed by the Consumers Cooperative of the Central Standards Bureau of the Ministry of Economic Affairs. 442 3 彳 9_B7_ The composition is a mixture of 95% by weight polyethylene and 5% by weight of PTFE powder. This is placed in a heating furnace at 160 ~ 220 ° C and heated for 30 ~ 90 minutes. To obtain a porous plastic filter with a hollow star shape with a thickness of 2mm. [Experiment N 0.34] After using the molding die used in Experiment No. 27, the gap between the molding die was filled with polyethylene having an average particle diameter of 30 and a molecular weight of 200,000 ultra-high molecular weight (MFR = 0 0 1 or less) The mixing ratio with the polyfluoroalkane acrylate dissolved in the solvent is 9.9% by weight of the ultra-high molecular weight polyethylene and the polyfluoroalkane acrylate content is 1% by weight. This is placed in a heating furnace at 160 ~ 220 ° C for 30 ~ 90 minutes and calcined to obtain a hollow plastic filter with a thickness of 2 mm. As shown in Table 8, No. 33, 30 There is no problem of particles falling off or powder falling off, and the value of the contact angle to water as a benchmark for evaluating the falling off performance is also large β

The reason why the PTFE particles of No. 30 do not fall off is unknown, but the reason why the PTF E particles are buried in the UHMWPE particles when the UHMWPE in the mold melts and expands.

The reason why the polyfluoroalkanoate of No. 34 does not fall off is that the lipophilic group is aligned on the ultra-high molecular weight polyethylene particle side after heating, and the high-density monofluoroalkyl group is aligned on the surface side. In addition, the pressure loss of N 〇 3 3 ~ 3 4 has no problem in practical use. The paper size is applicable to the Chinese national standard < CNS) A4 specification (210X297 mm) -------- II II BU_ _____T L __! _____ Dream ... Dou i — 0 (Please read the notes on the back before filling this page) -37-t 442 3 1 9 A7 B7 V. Description of the invention (35) Table 8 Experiment N 〇. 33 34 Presence or absence of particle shedding. 00 Particle collection performance. 00 Powder dropping property. ◎ Pressure loss (mmAq) 53 53 Contact angle to water (degrees) 120 115 Printed by the Consumer Cooperatives of the Central Standards Bureau of the Ministry of Economic Affairs as described above. The porous plastic filter of the present invention is composed of at least one surface with a water contact angle of 60 degrees or more, preferably 90 degrees or more, and a particle size of thermoplastic plastic particles in a range of 5 to 904 m. Moreover, since the porous plastic substrate and the porous layer with an integrated surface on the surface thereof, the porous layer is obtained by calcining the crosslinked polyolefin resin particles with a smaller average particle size to obtain a smaller pore size. Has good peeling performance and surface collection performance, without prior technology The P T F E particle shedding, the problem collected fine particles and the like, may provide the advantage of fine particles separated by the porous plastic filter is by "Further, the invention clad present porous method of manufacturing the plastic filter it has a really adjust thickness of each layer, and production efficiency. Ί n ~ order I ϋ It · " (Please read the note ^^ on the back before filling in this search) This paper size is applicable to the national standard (CNS) 8 4 specifications (2 丨 0X297 mm) 00 -00 Α ΑΟ η Λ Q Patent Application No. 86100614 4 I 3 Revised page of the Chinese manual B7 January 90, Republic of China 5. Description of the invention (Amendment 1

# Supplement I [Brief description of the figure] Fig. 1 is an embodiment of the porous plastic filter of the present invention. Fig. 2 is another embodiment of the porous plastic filter of the present invention. Fig. 3 is another embodiment of the porous plastic filter of the present invention. Fig. 4 is a schematic circle of the device of the porous plastic filter of the present invention. ------ I ----- 4 ------- 1 Order \ I Ί --- 1 ---- (Please read the notes on the back before filling this page) Intellectual Property Bureau of the Ministry of Economic Affairs Printed by employee consumer cooperatives C Description of main component symbols in the diagram 1 Filter device 2 Porous plastic filter 3 Carrier 4 Top of plastic filter 5 Cover 〇 This paper is also applicable to Chinese national standards (CNS > A4 size (210x297 mm)- 39-

Claims (1)

Ministry of Economic Affairs t Hui Property Bureau employee consumption cooperation printing A84423 19 ll D8 6. Scope of patent application ^ j expires §6 Wall ring patent application I-Ministry of Chinese & k scope of amendment Amendment of the Republic of China in January 1990 1. A porous plastic filter, characterized in that the porous plastic filter obtained by calcining the particles of a thermoplastic plastic material is formed, and the water contact angle of at least one surface of the porous plastic filter is 60 degrees to 180 Range, meanwhile, the average particle size is at least 5 to 90 izm of thermoplastic plastic material. 2. The porous plastic filter according to item 1 of the patent application, wherein the contact angle with water of at least one surface constituting the porous plastic filter is in the range of 90 degrees to 180 degrees. 3. For example, a porous plastic filter with the scope of item 1 or 2 of the patent application, wherein at least one surface of the porous plastic filter has a contact angle with water ranging from 90 degrees to 130 degrees. The multi-porous plastic filter in the first item of the scope, wherein the thermoplastic plastic material constituting the porous plastic filter is at least ultra-high molecular weight polyethylene. 5. For example, the porous plastic filter according to item 1 or 2 of the patent application scope, wherein the porous plastic filter is composed of a plurality of thermoplastic plastic materials, and at least one of them has an average particle size in the range of 5 to 90 jam. Of ultra-high molecular weight polyethylene. 6. The porous plastic filter according to item 5 of the patent application, wherein the porous plastic filter is composed of a plurality of thermoplastic plastic materials, and at least one is a fluorine resin material. (Please read the precautions on the back before filling this page) The paper size is applicable to the sibling country rubbing rate (CNS Μ4 specification (2f〇X297)) 1 C8 D8 ^ 442319 6. Scope of patent application (please read the back first Please fill in this page again. 7. If the porous plastic filter of item 6 of the patent application scope, the fluororesin material is composed of polytetrafluoroethylene particles or polyfluoroalkanoate particles, and its mixing ratio When the total amount is in the range of 0.1% to 50% by weight. 8. The porous plastic filter according to item 1 of the patent application * is composed of a porous plastic filter and a plurality of thermoplastic plastic materials. 'And it is obtained by mixing thermoplastic plastic materials with an average particle size in the range of 5 to 90 am and an average particle size in the range of 90 to 1,000. 9. Porosity, such as item 8 of the scope of patent application Quality plastic filter * It consists of thermoplastic plastic materials with a particle size of 90 # m and an average particle size of 90 # m to 1,0 0 0 am ', and a thermoplastic material with an average particle size in the range of 5 // m to 9 0 Mm The mixing ratio of plastic materials is 20 weight of the total amount 10. — A multi-layer porous plastic filter, which is characterized by containing an integrated porous plastic substrate and at least one porous layer on its surface. The porous plastic substrate is a range of 60 ° to 180 ° contact angle to water on at least one surface obtained by calcining larger thermoplastic plastic material particles having an average particle diameter of 90 to 1,00 μm. In addition, the porous layer on the surface is obtained by calcining smaller polyolefin-based crosslinked resin material particles having an average particle diameter of 5 μm to 90 Mm. The porous plastic filter of item 10 has at least one fold formed on the wall of the porous plastic filter to become a hollow cylinder. _ This paper rule Jt is applicable to China's national standard {CNS) A4 specification (2I0X297 mm) ABCD ^ 442 3 彳 9 VI. Scope of patent application 1 2. —A method for manufacturing a multilayer porous plastic filter, which is characterized in that after forming particles of a calcined thermoplastic plastic material, a porous plastic substrate (at least one of which The contact angle of the surface with water is in the range of 60 degrees to 180 degrees, and the average particle diameter is in the range of 90 to 1,000.) At the same time, the surface of the porous portion is provided by a conductive material. After electrical conductivity, use a thermoplastic plastic material that has mutual solubility with the surface of the porous plastic substrate and has a smaller average particle size of 5 M m to 9 0 # m than the particles that make up the porous plastic substrate. After heating the porous plastic substrate, the porous part of the porous plastic substrate is fused and covered with a porous layer having a smaller pore diameter than the substrate, and then integrated. (Please read the precautions on the back first (Fill in this page again) Printed by the Intellectual Property Bureau of the Ministry of Economy's Employees' Cooperatives The paper size is applicable to China National Standard (CNS) A4 (210x 297 male *) -3-