Gasket for filter device and filter device comprising said gasket

Abstract

The utility model relates to a gasket for filtering application and a device comprising the gasket. Gaskets for filtration applications are provided. A gasket for a filtration device includes a substrate including a cyclic polyolefin. The substrate includes a plurality of through-pores for filtering particles having an average particle size greater than 50 [mu] m. Filtration assemblies, filtration devices, and related systems and methods are also provided.

Description

Technical Field

[0001] The utility model relates to a gasket for filtering applications and related systems, equipment, devices and methods. Background Art

[0002] The presence of impurities on the components of a filtration device is problematic, especially for applications requiring high purity. The filtration process may cause these impurities or extractables to be released from the components, thereby contaminating the filtered fluid. Utility Model Content

[0003] Some embodiments relate to a gasket for a filtering device. In some embodiments, the gasket comprises a substrate, the substrate comprising a cyclic polyolefin. In some embodiments, the substrate comprises a plurality of through holes for filtering particles having an average particle size greater than 50 μm.

[0004] Some embodiments relate to a filter assembly. In some embodiments, the filter assembly includes a gasket. In some embodiments, the filter assembly includes a membrane upstream of the gasket. In some embodiments, the filter assembly includes a membrane downstream of the gasket. In some embodiments, the filter assembly includes a membrane upstream of the gasket and downstream of the gasket. In some embodiments, the gasket includes a cyclic polyolefin and a plurality of through holes for filtering particles having an average particle size greater than 50 μm.

[0005] Some embodiments relate to a filter device. In some embodiments, the filter device includes a housing having an inlet and an outlet. In some embodiments, the filter device includes a filter assembly disposed between the inlet and the outlet in the housing. In some embodiments, the filter assembly includes a gasket. In some embodiments, the filter assembly includes a membrane upstream of the gasket. In some embodiments, the filter assembly includes a membrane downstream of the gasket. In some embodiments, the filter assembly includes a membrane upstream of the gasket and downstream of the gasket. In some embodiments, the gasket includes a cyclic polyolefin and a plurality of through holes for filtering particles having an average particle size greater than 50 μm. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Some embodiments of the present invention are described herein by way of example only with reference to the accompanying drawings. With specific reference now to the accompanying drawings in detail, it is emphasized that the embodiments shown are by way of example and for the purpose of illustrative discussion of embodiments of the present invention. In this regard, the description in conjunction with the accompanying drawings makes it apparent to those skilled in the art how embodiments of the present invention may be practiced.

[0007] Figure 1 is a perspective view of a filter device including a gasket according to some embodiments.

[0008] Figure 2 is a cross-sectional view of a filter component according to some embodiments.

[0009] Figure 3 is a cross-sectional view of a filter component according to some embodiments.

[0010] Figure 4 is a scanning electron microscope (SEM) image of a polymer fiber including a cyclic olefin copolymer according to some embodiments.

[0011] Figure 5 is a SEM image of polymer fibers woven into a mat according to some embodiments. DETAILED DESCRIPTION

[0012] Among those benefits and improvements that have been disclosed, other objects and advantages of the utility model will become apparent from the following description in conjunction with the accompanying drawings. Detailed embodiments of the utility model are disclosed herein; however, it should be understood that the disclosed embodiments are merely illustrative of the utility model that can be embodied in various forms. In addition, each example given with respect to various embodiments of the utility model is intended to be illustrative rather than limiting.

[0013] Any prior patents and publications cited herein are hereby incorporated by reference in their entirety.

[0014] Throughout this specification and claims, unless the context clearly specifies otherwise, the following terms adopt the meanings clearly associated herein. The phrases "in one embodiment", "in an embodiment" and "in some embodiments" used herein may, but do not necessarily refer to the same embodiment. In addition, as used herein, the phrases "in another embodiment" and "in some other embodiments" may, but do not necessarily refer to different embodiments. All embodiments of the utility model are expected to be combinable without departing from the scope or spirit of the utility model.

[0015] As used herein, the term "based on" is not exclusive and allows for being based on additional factors not described, unless the context clearly indicates otherwise. In addition, throughout the specification, the meanings of "a", "an", and "the" include plural references. The meaning of "in..." includes "in..." and "on...".

[0016] As used herein, the term "olefin" refers to an unsaturated hydrocarbon containing at least one carbon-carbon double bond. 20 Olefins and C4-C 20α-olefins, etc. Non-limiting examples of olefins include at least one of the following: ethylene, propylene, butene, pentene, hexene, heptane, octene, nonene, decene, dodecene, tetradecene, hexadecene, octadecene, eicosene, docosene, tetracosene, hexacosene, octacosene, triacontaene, 3-methyl-1-butene, 3-methyl-1-pentene, 4-methyl-1-pentene, 4,6-dimethyl-1-heptene, C4-C 40 Diene, its isomer, its α-olefin, or any combination thereof. 40 Non-limiting examples of dienes include at least one of 1,3-butadiene, 1,3-pentadiene, 1,4-hexadiene, 1,5-hexadiene, 1,7-octadiene, 1,9-decadiene, or any combination thereof. Non-limiting examples of α-olefins include at least one of 1-propylene, 1-butene, 1-pentene, 1-hexene, 1-heptene, 1-octene, 1-nonene, 1-decene, 1-dodecene, 1-hexadecene, 1-octadecene, 1-eicos ...

[0017] As used herein, the term "cycloolefin" refers to an unsaturated hydrocarbon ring structure containing at least one carbon-carbon double bond in the ring structure. The term includes cycloolefins and dicycloolefins, tricycloolefins and tetracycloolefins. The non-limiting examples of cycloolefins include at least one of the following: cyclopropene, cyclobutene, cyclopentene (for example, cyclopentene, 1-methylcyclopentene, etc.), dicyclopentadiene, cyclohexene, cyclohexadiene (for example, 1,3-cyclohexadiene, 1,4-cyclohexadiene, etc.), cycloheptene, cyclooctene, cyclooctadiene (for example, 1,5-cyclooctadiene, etc.), cyclononane, cyclodecene, tetracyclododecene, norbornene, norbornene derivatives (for example, 5-methyl norbornene, bicyclo [2.2.1] hept-2-ene, ethylidene norbornene, vinyl norbornene, dicyclopentadiene, etc.), or any combination thereof.

[0018] As used herein, the term "cyclic olefin copolymer" (COC) refers to a copolymer comprising a cyclic olefin. In some embodiments, the cyclic olefin copolymer comprises a copolymer of a cyclic olefin and another monomer. In some embodiments, the cyclic olefin copolymer comprises a copolymer of a cyclic olefin and an olefin. In some embodiments, the cyclic olefin copolymer comprises a copolymer of a cyclic olefin and an alpha-olefin. In some embodiments, the cyclic olefin copolymer is prepared by copolymerization of the monomers. Non-limiting examples of cyclic olefin copolymers include Mitsui et al. and TOPAS advanced polymers Those cyclic olefin copolymers are commercially available.

[0019] As used herein, the term "cycloolefin polymer" (COP) refers to a polymer that includes a cycloolefin. In some embodiments, the cycloolefin is present in the polymer backbone of the polymer. In some embodiments, the cycloolefin polymer is prepared by ring-opening metathesis polymerization (ROMP) of a cycloolefin followed by hydrogenation. Non-limiting examples of cycloolefin polymers include Zeon and and And Japan Synthetic Rubber (JSR) Those cyclic olefin polymers that are commercially available. In some embodiments, the cyclic olefin is attached to the polymer backbone of the polymer, for example, but not limited to, as a pendant group attached to the polymer backbone of the polymer.

[0020] As used herein, the term "cyclic block copolymer" refers to a block copolymer comprising a cyclic compound. In some embodiments, the cyclic block copolymer comprises a copolymer of styrene and a conjugated diene. In some embodiments, styrene is fully hydrogenated styrene. In some embodiments, the cyclic block copolymer is produced by anionic polymerization. Non-limiting examples of conjugated dienes include at least one of the following: 1,3-pentadiene, 1,3-butadiene, 2-methyl-1,3-butadiene, 4-methyl-1,3-pentadiene, 1,3-cyclopentadiene, or any combination thereof.

[0021] As used herein, the term "cyclic polyolefin" refers to at least one of a cyclic olefin copolymer, a cyclic olefin polymer, a cyclic block copolymer, or any combination thereof.

[0022] As used herein, the term "polymer impurities" refers to at least one of oligomeric impurities, monomeric impurities, or any combination thereof.

[0023] Some embodiments relate to gaskets and related methods that can be used to improve the performance of a filter device. At least one advantage of the gaskets disclosed herein is that, unlike conventional gaskets, the gaskets disclosed herein have low levels of impurities. As used herein, the term "impurity" generally refers to an undesirable substance that is present in or may be present in a filtered product, such as through a filtering process. For example, an impurity can be a byproduct, residue, or another substance produced by at least one of the manufacture, pre-manufacturing process, post-manufacturing process, or any combination thereof of the gasket. Examples of impurities include, but are not limited to, at least one of a metal, a low polymer, a monomer, or any combination thereof.

[0024] The gasket may include a substrate. In some embodiments, the substrate includes a plurality of through holes. In some embodiments, the substrate is a non-woven substrate. In some embodiments, a plurality of through holes are formed in the non-woven substrate. In some embodiments, the substrate is a woven substrate. In some embodiments, the woven substrate includes a plurality of fibers. In some embodiments, a plurality of fibers are woven to obtain a plurality of through holes.

[0025] The substrate may be configured to provide pre-filtration of the fluid before the fluid flows through the membrane. That is, in some embodiments, the substrate is configured to inhibit at least a portion of the particles from passing through the gasket (e.g., based on the size difference between the plurality of through holes and the particles to be filtered). In some embodiments, the substrate is configured to filter particles that are larger than the particles filtered by the membrane. In some embodiments, the substrate is configured to filter particles having an average particle size greater than 50 μm, greater than 100 μm, greater than 200 μm, greater than 210 μm, greater than 220 μm, greater than 230 μm, greater than 240 μm, greater than 250 μm, greater than 260 μm, greater than 270 μm, greater than 280 μm, greater than 290 μm, or greater than 300 μm.

[0026] In some embodiments, the substrate is configured to filter particles having an average particle size of 50 μm to 300 μm, or any range or sub-range therebetween. For example, in some embodiments, the average particle size of the filtered particles is 50 μm to 280 μm, 50 μm to 260 μm, 50 μm to 250 μm, 50 μm to 240 μm, 50 μm to 220 μm, 50 μm to 200 μm, 50 μm to 180 μm, 50 μm to 160 μm, 50 μm to 150 μm, 50 μm to 140 μm, 50 μm to 120 μm, 50 μm to 100 μm, 50 μm to 80 μm. m, 50μm to 60μm, 60μm to 300μm, 80μm to 300μm, 100μm to 300μm, 120μm to 300μm, 140μm to 300μm, 150μm to 300μm, 160μm to 300μm, 180μm to 300μm, 220μm to 300μm, 240μm to 300μm, 250μm to 300μm, 260μm to 300μm, or 280μm to 300μm.

[0027] In some embodiments, the substrate is configured to filter particles having an average particle size of 200 μm to 300 μm, or any range or sub-range therebetween. For example, in some embodiments, the average particle size of the filtered particles is 200 μm to 295 μm, 200 μm to 290 μm, 200 μm to 285 μm, 200 μm to 280 μm, 200 μm to 275 μm, 200 μm to 270 μm, 200 μm to 265 μm, 200 μm to 260 μm, 200 μm to 255 μm, 200 μm to 250 μm, 200 μm to 245 μm, 200 μm to 240 μm, 200 μm to 235 μm, 200 μm to 230 μm, 200 μm to 225 μm, 200 μm to 220 μm, 200 μm to 215 μm, 200 μm to 210 μm. , 200μm to 205μm, 205μm to 300μm, 210μm to 300μm, 215μm to 300μm, 220μm to 300μm, 225μm to 300μm, 230μm to 300μm, 235μm to 300μm, 240μm to 300μm, 245μm to 300μm, 250μm to 300μm, 255μm to 300μm, 260μm to 300μm, 265μm to 300μm, 270μm to 300μm, 275μm to 300μm, 280μm to 300μm, 285μm to 300μm, 290μm to 300μm, or 295μm to 300μm.

[0028] In some embodiments, the substrate comprises or consists of a cyclic polyolefin. In some embodiments, for example, the substrate comprises at least one of a cyclic olefin copolymer (COC), a cyclic block copolymer (CBC), a cyclic olefin polymer (COP), or any combination thereof, or consists of at least one of a cyclic olefin copolymer (COC), a cyclic block copolymer (CBC), a cyclic olefin polymer (COP), or any combination thereof. In some embodiments, a plurality of fibers comprises or consists of a cyclic polyolefin. In some embodiments, for example, a plurality of fibers comprises at least one of a cyclic olefin copolymer, a cyclic block copolymer, a cyclic olefin copolymer, or any combination thereof, or consists of at least one of a cyclic olefin copolymer, a cyclic block copolymer, a cyclic olefin copolymer, or any combination thereof.

[0029] The plurality of fibers may have an average fiber diameter of 10 μm to 500 μm, or any range or sub-range therebetween. In some embodiments, the plurality of fibers has an average fiber diameter of 10 μm to 475 μm, 10 μm to 450 μm, 10 μm to 425 μm, 10 μm to 400 μm, 10 μm to 375 μm, 10 μm to 350 μm, 10 μm to 325 μm, 10 μm to 300 μm, 10 μm to 275 μm, 10 μm to 250 μm, 10 μm to 225 μm, 10 μm to 200 μm, 10 μm to 175 μm, 10 μm to 150 μm, 10 μm to 125 μm, 10 μm to 100 μm, 10 μm to 75 μm, 10 μm to 50 μm, 10 μm to 25 μm, 25μm to 500μm, 50μm to 500μm, 75μm to 500μm, 100μm to 500μm, 125μm to 500μm, 150μm to 500μm, 175μm to 500μm, 200μm to 500μm, 225μm to 500μm, 250μm to 500μm, 275μm to 500μm, 300μm to 500μm, 325μm to 500μm, 350μm to 500μm, 375μm to 500μm, 400μm to 500μm, 425μm to 500μm, 450μm to 500μm, or 475μm to 500μm.

[0030] The substrate may have a thickness of 20 μm to 1000 μm, or any range or sub-range therebetween. In some embodiments, the thickness of the substrate may be 20 μm to 950 μm, 20 μm to 900 μm, 20 μm to 850 μm, 20 μm to 800 μm, 20 μm to 750 μm, 20 μm to 700 μm, 20 μm to 650 μm, 20 μm to 600 μm, 20 μm to 550 μm, 20 μm to 500 μm, 20 μm to 450 μm, 20 μm to 400 μm, 20 μm to 350 μm, 20 μm to 300 μm, 20 μm to 250 μm, 20 μm to 200 μm, 20 μm to 150 μm, 20 μm to 100 μm, 20 μm to 50 μm, 50 μm to 1000 μm, or 20 μm to 50 μm. 100μm to 1000μm, 150μm to 1000μm, 200μm to 1000μm, 250μm to 1000μm, 300μm to 1000μm, 350μm to 1000μm, 400μm to 1000μm, 450μm to 1000μm, 500μm to 1000μm, 550μm to 1000μm, 600μm to 1000μm, 650μm to 1000μm, 700μm to 1000μm, 750μm to 1000μm, 800μm to 1000μm, 850μm to 1000μm, 900μm to 1000μm, or 950μm to 1000μm.

[0031] The substrate may have a low level of impurities. In some embodiments, the impurity content can be determined by soaking the substrate in a solution of 10% HCl and isopropanol for about 24 hours and then measuring whether impurities are present in the solution. In some embodiments, the substrate includes a low level of metal impurities. In some embodiments, the metal impurities include at least one of the following: sodium impurities, magnesium impurities, aluminum impurities, potassium impurities, calcium impurities, iron impurities, zinc impurities, or any combination thereof. In some embodiments, the metal impurities include at least one of the following: sodium, magnesium, aluminum, potassium, calcium, iron, zinc, or any combination thereof.

[0032] In some embodiments, the substrate includes 2 μg or less of metal impurities per gram of substrate, or any range or sub-range between no metal impurities and 2 μg of metal impurities per gram of substrate. For example, in some embodiments, the substrate includes 0.001 μg to 2 μg, 0.01 μg to 2 μg, 0.1 μg to 2 μg, 0.2 μg to 2 μg, 0.3 μg to 2 μg, 0.4 μg to 2 μg, 0.5 μg to 2 μg, 0.6 μg to 2 μg, 0.7 μg to 2 μg, 0.8 μg to 2 μg, 0.9 ... μg, 1μg to 2μg, 1.1μg to 2μg, 1.2μg to 2μg, 1.3μg to 2μg, 1.4μg to 2μg, 1.5μg to 2μg, 1.6μg to 2μg, 1.7μg to 2μg, 1.8μg to 2μg, 1.9μg to 2μg, 0.001μg to 1.9μg, 0.001μg to 1.8μ g, 0.001μg to 1.7μg, 0.001μg to 1.6μg, 0.001μg to 1.5μg, 0.001μg to 1.4μg, 0.001μg to 1.3μg, 0.001μg to 1.2μg, 0.001μg to 1.1μg, 0.001μg to 1μg, 0.001μg to 0.9μg, 0 .001μg to 0.8μg, 0.001μg to 0.7μg, 0.001μg to 0.6μg, 0.001μg to 0.5μg, 0.001μg to 0.4μg, 0.001μg to 0.3μg, 0.001μg to 0.2μg, 0.001μg to 0.1μg, or 0.001μg to 0.01μg.

[0033] In some embodiments, the substrate includes a low content of polymer impurities. In some embodiments, the polymer impurities have a weight average molecular weight of 2000 g / mol or less, or any range or sub-range between 100 g / mol and 2000 g / mol. In some embodiments, the weight average molecular weight of the polymer impurities is 100 g / mol to 1900 g / mol, 100 g / mol to 1800 g / mol, 100 g / mol to 1700 g / mol, 100 g / mol to 1600 g / mol, 100 g / mol to 1500 g / mol, 100 g / mol to 1400 g / mol, 100 g / mol to 1300 g / mol, 100 g / mol to 1200 g / mol. , 100g / mol to 1100g / mol, 100g / mol to 1000g / mol, 100g / mol to 900g / mol, 100g / mol to 800g / mol, 100g / mol to 700g / mol, 100g / mol to 600g / mol, 100g / mol to 500g / mol, 100g / mol to 400g / mol, 100g / mol to 300g / mol, 100g / mol 1 to 200g / mol, 200g / mol to 1900g / mol, 300g / mol to 1900g / mol, 400g / mol to 1900g / mol, 500g / mol to 1900g / mol, 600g / mol to 1900g / mol, 700g / mol to 1900g / mol, 800g / mol to 1900g / mol, 900g / mol to 1900g / mol, 1000g / mol To 1900 g / mol, 1100 g / mol to 1900 g / mol, 1200 g / mol to 1900 g / mol, 1300 g / mol to 1900 g / mol, 1400 g / mol to 1900 g / mol, 1500 g / mol to 1900 g / mol, 1600 g / mol to 1900 g / mol, 1700 g / mol to 1900 g / mol, or 1800 g / mol to 1900 g / mol.

[0034] In some embodiments, the substrate includes less than 5 wt % polymer impurities, or any range or sub-range between 0.0001 wt % polymer impurities and 5 wt % polymer impurities. In some embodiments, for example, the substrate includes less than 4.8 wt%, less than 4.6 wt%, less than 4.4 wt%, less than 4.2 wt%, less than 4 wt%, less than 3.8 wt%, less than 3.6 wt%, less than 3.4 wt%, less than 3.2 wt%, less than 3 wt%, less than 2.8 wt%, less than 2.6 wt%, less than 2.4 wt%, less than 2.2 wt%, less than 2 wt%, less than 1.8 wt%, less than 1.6 wt%, less than 1.4 wt%, less than 1.2 wt%, less than 1 wt%, less than 0.8 wt%, less than 0.6 wt%, less than 0.4 wt%, less than 0.2 wt%, less than 0.1 wt%, less than 0.01 wt%, less than 0.001 wt%, or less than 0.0001 wt% of polymer impurities based on the total weight of the substrate.

[0035] In some embodiments, the filter includes one or more gaskets adjacent to the membrane, between the membranes and / or around the membrane. In some embodiments, the average pore size of the membrane is at least 100 times smaller than the average pore size of the gasket. In some embodiments, the gasket is configured to allow flow through the filter and / or increase the turbulence of the flow, while having no measurable contribution to the pressure drop across the filter (e.g., not affecting the pressure drop across the filter device by more than 1%). In some embodiments, the gasket is a screen that provides various functions in the filter. For example, in some embodiments, a feed gasket is included in the filter to prevent the membrane from adhering to itself and prevent the filter from feeding, both of which reduce the productivity of the filter. In some embodiments, the gasket provides support and protection for the membrane. For example, the gasket prevents damage to the membrane by buffering the membrane and preventing the membrane from wearing itself or other elements in the filter housing. In some embodiments, the gasket is a support structure for pleated or unpleated membranes, thereby forming a composite structure in the filter device. In some embodiments, the gasket is not a membrane for filtration.

[0036] Figure 1 is a perspective view of a filter device 100 according to some embodiments. Figure 1 As shown, the filter device 100 includes a housing 110 having an end cap 120 at a first end and a fluid fitting 130 at a second end. A core 140 is disposed within the housing 110, wherein a filter assembly 150 is disposed around the core 140. The filter assembly 150 includes an upstream gasket 160, a membrane 170, and a downstream gasket 180. The membrane 170 is shown sandwiched between the upstream gasket 160 and the downstream gasket 180. In the illustrated embodiment, the upstream gasket 160, the membrane 170, and the downstream gasket 180 are shown in a pleated configuration.

[0037] Figure 2 is a cross-sectional view of filter assembly 200 according to some embodiments. Figure 2 As shown, filter assembly 200 includes an upstream gasket 205, a downstream gasket 210, and a membrane 215 between upstream gasket 206 and downstream gasket 210. In some embodiments, upstream gasket 205 directly contacts membrane 215. In some embodiments, downstream gasket 210 directly contacts membrane 215. In some embodiments, upstream gasket 206, downstream gasket 210, and membrane 215 are shown in a pleated configuration. Feed can enter any one or more of volumes 220 between pleats 225. After entering volume 220, the feed flows through upstream gasket 205 to membrane 215. As the feed flows through membrane 215, the feed is filtered and after leaving membrane 215, the feed flows through downstream gasket 210 to core 230.

[0038] Figure 3 is a cross-sectional view of filter assembly 300 according to some embodiments. Figure 3 As shown, filter assembly 300 includes an upstream gasket 305, a downstream gasket 310, and a membrane 315 between the upstream gasket 305 and the downstream gasket 310. In some embodiments, the upstream gasket 305 contacts at least a portion of the membrane 315. In some embodiments, the downstream gasket 310 contacts at least a portion of the membrane 315. Although filter assembly 300 is shown as having both an upstream gasket 305 and a downstream gasket 310, it should be understood that filter assembly 300 may include additional gaskets or fewer gaskets on either or both of the upstream and downstream sides of filter assembly 300. For example, in some embodiments, filter assembly 300 does not include at least one of the upstream gasket 305, the downstream gasket 310, or any combination thereof. In some embodiments, filter assembly 300 includes at least one additional gasket on at least one of the upstream or downstream sides of filter assembly 300. In some embodiments, filter assembly 300 does not include a third gasket upstream or downstream of membrane 315. In some embodiments, filter assembly 300 does not include a second filter membrane (ie, includes only a single filter membrane).

[0039] Example 1

[0040] Polymer fibers including cyclic polyolefins are extruded and woven into substrates. Sample 1 includes polymer fibers of cyclic olefin copolymers (COC). Sample 2 includes polymer fibers of cyclic block copolymers (CBC). Sample 3 is a control pad including high-density polyethylene (HDPE) and polypropylene (PP). Compared with polyethylene copolymers, polyethylene may not be woven due to crystal cracking. The impurity content of samples 1 to 3 is measured by soaking each sample in a solution of 10% HCl and isopropanol for about 24 hours, and then measuring whether there are metal and polymer impurities (e.g., oligomers, monomers, or at least one of any combination thereof) with a weight-average molecular weight less than 2000g / mol in the resulting solution. The weight percentage is based on the gross weight of each sample. The results are summarized in Table 1 below.

[0041]

[0042] Example 2

[0043] Various polymer fibers including cycloolefin copolymers are extruded and woven into a woven substrate. The polymer fibers including cycloolefin copolymers have a fiber diameter in the range of 50 microns to 80 microns. These polymer fibers are woven into a pad with a thickness of 160 microns. The impurity content of the pad is measured by soaking the pad in a solution of 10% HCl and isopropanol for about 24 hours, and then measuring whether there is metal in the resulting solution. The pad has a total impurity of less than 4% μg / g, including sodium, magnesium, aluminum, potassium, calcium, iron and zinc. Figure 4 is a scanning electron microscope (SEM) image of a polymer fiber including a cyclic olefin copolymer according to some embodiments. Figure 5 is a SEM image of polymer fibers woven into a mat according to some embodiments.

[0044] aspect

[0045] Various aspects are described below. It should be understood that any one or more of the features described in the following aspects can be combined with any one or more other aspects.

[0046] Aspect 1. A gasket for a filter device, the gasket comprising:

[0047] A substrate comprising a cyclic polyolefin,

[0048] The substrate comprises a plurality of through holes for filtering particles having an average particle size greater than 50 μm.

[0049] Aspect 2. The gasket according to aspect 1, wherein the cyclic polyolefin comprises a cyclic olefin copolymer.

[0050] Aspect 3. The gasket according to any one of aspects 1 to 2, wherein the cyclic polyolefin comprises a cyclic block copolymer.

[0051] Aspect 4. The gasket according to any one of aspects 1 to 3, wherein the cyclic polyolefin comprises a cyclic olefin polymer.

[0052] Aspect 5. The shim according to any one of aspects 1 to 4, wherein the substrate comprises 2 μg or less of metal impurities per gram of the substrate.

[0053] Aspect 6. The gasket according to aspect 5, wherein the metal impurities include at least one of the following: sodium, magnesium, aluminum, potassium, calcium, iron, zinc, or any combination thereof.

[0054] Aspect 7. The gasket according to any one of aspects 1 to 6, wherein the substrate comprises less than 5 wt % polymer impurities based on the total weight of the substrate.

[0055] Aspect 8. The gasket according to aspect 7, wherein the polymer impurities have a weight average molecular weight of 2000 g / mol or less.

[0056] Aspect 9. The gasket according to any one of aspects 1 to 8, wherein the substrate is a woven substrate, comprising:

[0057] a plurality of fibers comprising the cyclic polyolefin;

[0058] The plurality of fibers are woven to obtain the plurality of through holes.

[0059] Aspect 10. The gasket according to aspect 9, wherein the plurality of fibers have a fiber diameter of 10 μm to 500 μm.

[0060] Aspect 11. The gasket according to aspect 9, wherein the substrate has a thickness of 20 μm to 1000 μm.

[0061] Aspect 12. A filtering device comprising:

[0062] a housing having an inlet and an outlet;

[0063] a filter assembly disposed between the inlet and the outlet in the housing, the filter assembly comprising:

[0064] Gaskets; and

[0065] a membrane upstream or downstream of the spacer;

[0066] The gasket comprises:

[0067] Cyclic polyolefins; and

[0068] A plurality of through holes are provided for filtering particles with an average particle size greater than 50 μm.

[0069] Aspect 13. The filtration device according to aspect 12, wherein the cyclic polyolefin comprises at least one of: a cyclic olefin copolymer, a cyclic block copolymer, a cyclic olefin polymer, or any combination thereof.

[0070] Aspect 14. The filtration device according to any one of aspects 12 to 13, wherein the gasket comprises 2 μg or less of metal impurities per gram of the gasket.

[0071] Aspect 15. The filtration device according to aspect 14, wherein the metal impurities include at least one of the following: sodium, magnesium, aluminum, potassium, calcium, iron, zinc, or any combination thereof.

[0072] Aspect 16. The filtration device according to any one of aspects 12 to 15, wherein the gasket comprises less than 5 weight % of polymer impurities based on the total weight of the gasket.

[0073] Aspect 17. The filtration device according to aspect 16, wherein the polymer impurities have a weight average molecular weight of 2000 g / mol or less.

[0074] Aspect 18. A filtering device comprising:

[0075] a housing having an inlet and an outlet;

[0076] a filter assembly disposed between the inlet and the outlet in the housing, the filter assembly comprising:

[0077] Gaskets; and

[0078] a membrane upstream or downstream of the spacer;

[0079] wherein the gasket comprises a plurality of fibers, the fibers comprising a cyclic polyolefin;

[0080] The plurality of fibers are woven to obtain a plurality of through holes for filtering particles having an average particle size greater than 50 μm.

[0081] Aspect 19. The filtration device according to aspect 18, wherein the plurality of fibers have a fiber diameter of 10 μm to 500 μm.

[0082] Aspect 20. The filter device according to any one of aspects 18 to 19, wherein the thickness of the spacer is 20 μm to 1000 μm.

[0083] It should be understood that changes in detail may be made, especially in the shapes, sizes and arrangements of the construction materials and parts, without departing from the scope of the present invention. This specification and the described embodiments are only examples, and the true scope and spirit of the present invention are indicated by the appended claims.

Claims

1. A gasket for a filter device, characterized in that The gasket comprises: A substrate comprising a cyclic polyolefin, wherein the substrate comprises a plurality of through holes for filtering particles having an average particle size greater than 50 μm, The substrate is a woven substrate comprising: a plurality of fibers comprising the cyclic polyolefin; The plurality of fibers are woven to obtain the plurality of through holes.

2. The gasket according to claim 1, characterized in that The cyclic polyolefin includes a cyclic olefin copolymer.

3. The gasket according to claim 1, characterized in that The cyclic polyolefins include cyclic block copolymers.

4. The gasket according to claim 1, characterized in that The cyclic polyolefin includes a cyclic olefin polymer.

5. The gasket according to claim 1, characterized in that The plurality of fibers have a fiber diameter of 10 μm to 500 μm.

6. The gasket according to claim 1, characterized in that The substrate has a thickness of 20 μm to 1000 μm.

7. A filtering device, characterized in that The filtering device comprises: a housing having an inlet and an outlet; a filter assembly disposed between the inlet and the outlet in the housing, the filter assembly comprising: Gaskets; and a membrane upstream or downstream of the spacer; The gasket comprises: Cyclic polyolefins; and A plurality of through holes are provided for filtering particles with an average particle size greater than 50 μm.

8. The filtering device according to claim 7, characterized in that The shim includes 2 μg or less of metal impurities per gram of the shim.

9. A filtering device, characterized in that The filtering device comprises: a housing having an inlet and an outlet; a filter assembly disposed between the inlet and the outlet in the housing, the filter assembly comprising: Gaskets; and a membrane upstream or downstream of the spacer; wherein the gasket comprises a plurality of fibers, the fibers comprising a cyclic polyolefin; The plurality of fibers are woven to obtain a plurality of through holes for filtering particles having an average particle size greater than 50 μm.

10. The filtering device according to claim 9, characterized in that The plurality of fibers have a fiber diameter of 10 μm to 500 μm.

11. The filtering device according to claim 9, characterized in that The thickness of the spacer is 20 μm to 1000 μm.

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