CN110027279B - PTFE tectorial membrane acupuncture felt - Google Patents
PTFE tectorial membrane acupuncture felt Download PDFInfo
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- CN110027279B CN110027279B CN201910334994.3A CN201910334994A CN110027279B CN 110027279 B CN110027279 B CN 110027279B CN 201910334994 A CN201910334994 A CN 201910334994A CN 110027279 B CN110027279 B CN 110027279B
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/12—Layered products comprising a layer of synthetic resin next to a fibrous or filamentary layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B33/00—Layered products characterised by particular properties or particular surface features, e.g. particular surface coatings; Layered products designed for particular purposes not covered by another single class
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B5/00—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts
- B32B5/22—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed
- B32B5/24—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer
- B32B5/26—Layered products characterised by the non- homogeneity or physical structure, i.e. comprising a fibrous, filamentary, particulate or foam layer; Layered products characterised by having a layer differing constitutionally or physically in different parts characterised by the presence of two or more layers which are next to each other and are fibrous, filamentary, formed of particles or foamed one layer being a fibrous or filamentary layer another layer next to it also being fibrous or filamentary
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/08—Interconnection of layers by mechanical means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0223—Vinyl resin fibres
- B32B2262/0238—Vinyl halide, e.g. PVC, PVDC, PVF, PVDF
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Abstract
The invention belongs to the technical field of needled felts, and particularly relates to a PTFE (polytetrafluoroethylene) film-coated needled felt. According to the invention, the clamping plate, the clamping hole, the bolt, the nut, the rotating plate unit, the fixing plate unit and the extension sliding sleeve unit are arranged on the PTFE net base layer, the heat insulation cotton layer and the PTFE film coating layer, so that the effect of high clamping stability after the multi-layer needled felt structure is attached is achieved. The invention has the advantages of reasonable and effective clamping and fixing structure on two sides of the needled felt, high structural strength in a screw connection and compression mode, moderate splitting difficulty, difficult layering and scattering of the needled felt, and good integral filtering and using effect.
Description
Technical Field
The invention belongs to the technical field of needled felts, and particularly relates to a PTFE (polytetrafluoroethylene) film-coated needled felt.
Background
The PTFE tectorial membrane needled felt is a filtering material with excellent performance, mainly comprises a PTFE grid basic layer, heat insulation cotton layers on two sides and PTFE fiber tectorial membrane layers on two sides of the outermost side, and is used for meeting the filtering use requirement under the high-temperature condition. On the other hand, the multilayer needled felt structure has the problems of insufficient bonding strength and easy layering and scattering of the multilayer structure, the existing solution is to simply sew, but the sewing method has the problems of insufficient bonding strength and inconvenient disassembly and replacement of a certain layer of material, so that a PTFE (polytetrafluoroethylene) film needled felt with a large bonding strength of the multilayer structure is urgently needed in the market.
The patent publication No. CN103432827A, Chinese patent disclosure No. 2013.12.11, discloses a high-performance PTFE needled felt filter material and a preparation process thereof, wherein the filter material sequentially comprises a fine-denier PTFE fiber mesh layer, a first base cloth layer, an upper PTFE fiber mesh layer, a second base cloth layer and a lower PTFE fiber mesh layer; the fine denier PTFE fiber net layer is made of fine denier PTFE fibers through pretreatment, pre-loosening and carding, the first base cloth layer and the second base cloth layer are made of PTFE base cloth through pretreatment and processing, and the upper layer PTFE fiber net layer and the lower layer PTFE fiber net layer are made of common PTFE fibers through pretreatment, pre-loosening and carding.
However, the PTFE needled felt of this patent has a problem of low structural strength.
Disclosure of Invention
The invention aims to provide a PTFE (polytetrafluoroethylene) film-coated needled felt which can achieve the effect of high clamping stability after the structure of a multilayer needled felt is attached by arranging a clamping plate, a clamping hole, a bolt, a nut, a rotating plate unit, a fixing plate unit and an extension sliding sleeve unit on a PTFE net base layer, a heat insulation cotton layer and a PTFE film-coated layer. The invention has the advantages of reasonable and effective clamping and fixing structure on two sides of the needled felt, high structural strength in a screw connection and compression mode, moderate splitting difficulty, difficult layering and scattering of the needled felt, and good integral filtering and using effect.
The technical scheme adopted by the invention for solving the problems is as follows: a PTFE membrane needled felt comprises a PTFE net base layer, heat insulation cotton layers arranged at two sides of the PTFE net base layer, the multilayer needled felt structure comprises a PTFE film coating layer arranged on the heat insulation cotton layer, and also comprises two pairs of clamping plates which are arranged at two sides of the side edge of the multilayer needled felt structure and used for clamping and fixing, clamping holes arranged at the exposed ends of the clamping plates, bolts and nuts which are inserted and arranged on the clamping holes, a rotating plate unit which is adhered and arranged on the PTFE film coating layer and used for increasing the stability of the multilayer needled felt structure by the way of rotationally pressing the nuts after being hinged, and a fixing plate unit which is adhered and arranged on the PTFE film coating layer and used for fixing the rotating plate unit by the way of rotationally inserting through the rotating plate unit, and the extension sliding sleeve unit is sleeved on the rotating plate unit and is used for being inserted and fixed with the fixed plate unit in an axial extension mode.
The further preferred technical scheme is as follows: the rotating plate unit comprises an installation plate which is bonded on the PTFE film coating layer, a rotating pressing plate with an end hinged on the side surface of the installation plate and used for pressing the screw cap, and an axial channel which is arranged on the ring surface of the rotating pressing plate and used for inserting and installing the extending sliding sleeve unit; the fixing plate unit comprises a plate body which is arranged on the PTFE film coating layer in an adhering mode, and a fixing insertion hole which is arranged on the plate body and corresponds to the rotary pressing plate after being placed horizontally in a rotating mode; the extension sliding sleeve unit comprises an insertion column and an arc-shaped sleeve body, wherein the inner side end of the insertion column is inserted into the axial channel, the arc-shaped sleeve body is arranged at the outer side end of the insertion column and is attached to the annular surface of the rotary pressing plate, and the arc-shaped sleeve body is used for being fixedly inserted into the insertion hole after sliding.
The further preferred technical scheme is as follows: the rotating plate unit further comprises an annular groove which is arranged on the annular surface of the rotating pressing plate, communicated with the axial groove and used for annular rotation of the inserting column after axial sliding, the inner surfaces of the axial groove and the annular groove are both arc-shaped, the outer annular surface of the arc-shaped sleeve body is attached to the inner annular surface of the inserting hole for fixing after the arc-shaped sleeve body rotates on the annular groove, and the inner side end of the inserting column is a sphere which is embedded into the axial groove and the annular groove and is used for annular clamping and limiting.
The further preferred technical scheme is as follows: the extension sliding sleeve unit further comprises a fixing plate which is bonded on the PTFE film coating layer, a fixed magnet block which is arranged on the fixing plate, and a sleeve body magnet block which is bonded on the outer ring surface of the arc sleeve body and is used for axially fixing the arc sleeve body in a magnetic attraction manner with the fixed magnet block.
The further preferred technical scheme is as follows: the plate body is close to be equipped with the plate body magnet piece on the side of nut, be equipped with the ring channel on the nut annular side, the embedding is equipped with through with the plate body magnet piece carries out the hoop magnetic force attraction mode in order to be used for the increase the nut loosens the magnet ring of rolling back the resistance.
The further preferred technical scheme is as follows: the sleeve magnet block and the insertion column are arranged at the middle position in the axial direction of the arc sleeve body, and the annular channel is vertically aligned with the magnet ring body after the rotary pressing plate is rotated and laid flat.
The further preferred technical scheme is as follows: the axial channel and the annular channel respectively comprise a rectangular notch which is arranged on the outer side of the inner surface of the arc-shaped groove and used for the insertion column to pass through.
The further preferred technical scheme is as follows: the paper of the ball is larger than the opening width of the rectangular notch.
The further preferred technical scheme is as follows: the two pairs of the rotating plate units, the fixing plate units and the extension sliding sleeve units are symmetrically arranged at the positions of two sides of the clamping hole, and the multilayer needled felt structure is provided with four pairs of bolts and nuts.
The further preferred technical scheme is as follows: and the clamping plate is provided with a mounting hole for mounting the multi-layer needled felt structure at the position outside the clamping hole.
According to the invention, the clamping plate, the clamping hole, the bolt, the nut, the rotating plate unit, the fixing plate unit and the extension sliding sleeve unit are arranged on the PTFE net base layer, the heat insulation cotton layer and the PTFE film coating layer, so that the effect of high clamping stability after the multi-layer needled felt structure is attached is achieved. The invention has the advantages of reasonable and effective clamping and fixing structure on two sides of the needled felt, high structural strength in a screw connection and compression mode, moderate splitting difficulty, difficult layering and scattering of the needled felt, and good integral filtering and using effect.
Drawings
FIG. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a schematic view of the position structure of the clamping plate, the bolt and the nut of the present invention.
Fig. 3 is a schematic structural diagram of the positions of the rotating plate unit and the fixing plate unit according to the present invention.
FIG. 4 is a side view of the position structure of the arc-shaped sheath body according to the present invention.
Fig. 5 is a schematic view showing the positional structure of the axial grooves and the circumferential grooves in the present invention.
FIG. 6 is a schematic view showing the use of the glove body of the present invention.
FIG. 7 is a top view of the rotary pressing plate and the arc-shaped sleeve of the present invention.
Detailed Description
The following description is only a preferred embodiment of the present invention and is not intended to limit the scope of the present invention.
Example (b): as shown in fig. 1, 2, 3, 4, 5, 6 and 7, a PTFE membrane-coated needled felt includes a multi-layer needled felt structure composed of a PTFE web base layer 11, thermal insulation cotton layers 12 disposed on both sides of the PTFE web base layer 11, and PTFE membrane-coated layers 13 disposed on the thermal insulation cotton layers 12, and further includes two pairs of clamping plates 1 disposed at both sides of the side edges of the multi-layer needled felt structure for clamping and fixing, clamping holes 2 disposed on the exposed ends of the clamping plates 1, bolts 3 and nuts 4 inserted into the clamping holes 2, a rotating plate unit 5 adhesively disposed on the PTFE membrane-coated layers 13 for increasing the structural stability of the multi-layer needled felt by rotationally pressing the nuts 4 after being hinged, a fixing plate unit 6 adhesively disposed on the PTFE membrane-coated layers 13 for fixing the rotating plate unit 5 by rotationally inserting the rotating plate unit 5, and an elongated sliding sleeve unit 7 which is sleeved on the rotating plate unit 5 and is used for being inserted and fixed with the fixed plate unit 6 in an axial elongated mode.
In this embodiment, both sides are totally four clamping plate 1 is used for pressing from both sides five layers of simply piling up multilayer needled felt structure, bolt 3 and nut 4 are used for it is fixed to peg graft on the tight hole 2 of clamp, consequently nut 4 does not become flexible and drops, multilayer needled felt structure just can not the layering scatter, consequently effective spiro union relation of nut 4 is PTFE tectorial membrane needled felt stable use, the key that does not scatter.
Wherein, the rotor plate unit 5 is pressed after the rotation on the side of nut 4, then rotatory outside end again with fixed plate unit 6 pegs graft, finally guarantees nut 4 is difficult for following drop on the bolt 3, the separation is difficult for disintegration of multilayer acupuncture felt structure, and rotor plate unit 5 self length is not enough, can not insert go on fixed plate unit 6, and this just requires extension slip cap unit 7 can be in axial slip on rotor plate unit 5, extension slip cap unit 7 inserts back on the fixed plate unit 6, and can not rotor plate unit 5 upwarps turns over the book, and this has just guaranteed rotor plate unit 5 is right the stable compressing effect of nut 4.
The rotating plate unit 5 comprises a mounting plate 501 which is bonded on the PTFE film layer 13, a rotating pressing plate 502 which is hinged on the side surface of the mounting plate 501 and is used for pressing the screw cap 4, and an axial channel 503 which is arranged on the ring surface of the rotating pressing plate 502 and is used for inserting and mounting the elongated sliding sleeve unit 7; the fixing plate unit 6 includes a plate body 601 adhesively attached to the PTFE coated layer 13, and a fixing insertion hole 602 provided in the plate body 601 and corresponding to the rotating and pressing plate 502 that has been rotated and laid flat; the extension sliding sleeve unit 7 includes an insertion column 701 having an inner end inserted into the axial groove 503, and an arc sleeve body 702 disposed at an outer end of the insertion column 701, annularly attached to the rotary compression plate 502, and configured to be inserted into and fixed to the fixing insertion hole 602 after sliding.
In this embodiment, the rotating pressing plate 502 is used for pressing and fixing the nut 4, and the specific manner and advantages are as follows:
firstly, initially, after the nut 4 is screwed, the rotating pressing plate 502 rotates to be placed on the plane on the nut 4 side, at this time, the rotating pressing plate 502 is separated from the fixing insertion hole 602 and cannot reach enough, the arc-shaped sleeve body 702 is on the side of the axial channel 503 far away from the fixing insertion hole 602, and the state is also the structural state when the rotating pressing plate 502 is released from pressing;
second, the arc cover body 702 is in towards on the axial channel 503 the plate body 601 direction slides, until inserting in fixed jack 602, just insert post 701 with stable block between the axial channel 503 has avoided the arc cover body 702 with take place to turn over between the rotatory pressure strip 502 and turn over a phenomenon, finally the fixed pore wall that uses jack 602 compresses tightly behind the arc cover body 702, compressed tightly whole promptly rotatory pressure strip 502, rotatory pressure strip 502 is right the anti-drop action of compressing tightly of nut 4 takes effect, PTFE tectorial membrane acupuncture felt has the spiro union and presss from both sides the advantage of action stability.
The rotating plate unit 5 further includes an annular groove 504 which is disposed on the annular surface of the rotating pressing plate 502, is communicated with the axial groove 503, and is used for the insertion column 701 to axially slide and then to rotate in the annular direction, inner surfaces of the axial groove 503 and the annular groove 504 are both arc-shaped, the outer annular surface of the arc-shaped sleeve body 702 rotates on the annular groove 504 and then is attached to the inner annular surface of the insertion hole 602, and an inner end of the insertion column 701 is a sphere which is embedded in the axial groove 503 and the annular groove 504 and is circumferentially clamped and limited. The elongated sliding sleeve unit 7 further includes a fixing plate 703 adhesively provided on the PTFE coated layer 13, a fixing magnet block 704 provided on the fixing plate 703, and a sleeve magnet block 705 adhesively provided on the outer circumferential surface of the arc sleeve body 702 and axially fixing the arc sleeve body 702 by magnetically attracting the fixing magnet block 704 to each other.
In this embodiment, the annular groove 504 is configured to allow the arc-shaped sleeve body 702 to axially slide on the axial groove 503 to the bottom and then perform annular rotational sliding, so that the outer annular surface of the arc-shaped sleeve body 702 receives the pressing force of the inner ring of the fixing insertion hole 602 against the fixing insertion hole, thereby ensuring the stability of the effect of the arc-shaped sleeve body 702 on transferring the pressing force, and the insertion column 701 includes a sphere for being inserted into the groove and a connection column for ensuring that the insertion column 701 is not easily axially separated from the annular groove 504 and the axial groove 503 and axially bent, i.e., after the protruding end of the arc-shaped sleeve body 702 is downwardly stressed compared with the cylindrical rotational pressing plate 502, the arc-shaped sleeve body 702 does not bend into a "V-shaped" harmful state with the rotational pressing plate 502.
On the other hand, the circumferential magnetic attraction between the fixed magnet block 704 and the sleeve magnet block 705 ensures that the arc sleeve 702 and the rotating pressing plate 502 do not rotate randomly when the nut 4 is not installed and the whole PTFE coated needled felt is idle.
In this embodiment, the plate body magnet piece 8 with the hoop magnetic force attraction effect between the magnet ring 10, the purpose is the increase equally the unexpected not hard up resistance that falls of nut 4, promptly when nut 4 is become hard up rotatory, overcome plate body magnet piece 8 with be close to the resistance that attracts the rotatory change in position between the magnet ring 10, consequently nut 4's spiro union relation is difficult for falling down more.
The sleeve magnet block 705 and the annular groove 504 are located right above the annular side surface of the magnet ring 10, so that the sleeve magnet block 705 is away from the two magnetic poles of the magnet ring 10, and the magnetic attraction between the plate magnet piece 8 and the magnet ring 10 is prevented from being reduced due to the attraction of the sleeve magnet block 705.
And the clamping plate 1 is provided with a mounting hole 14 for mounting the multi-layer needled felt structure at the position outside the clamping hole 2.
In this embodiment, four after 14 departments of mounting hole install on filter equipment, whole the PTFE tectorial membrane needled felt has just been installed, guarantees that PTFE tectorial membrane needled felt has simple to operate to and the big dual advantage of self structural strength.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various modifications can be made within the knowledge of those skilled in the art without departing from the gist of the present invention. These are non-inventive modifications, which are intended to be protected by patent laws within the scope of the claims appended hereto.
Claims (8)
1. The utility model provides a PTFE tectorial membrane acupuncture felt, includes by PTFE net basic unit (11), sets up thermal-insulated cotton layer (12) of PTFE net basic unit (11) both sides, and sets up the multilayer acupuncture felt structure that PTFE tectorial membrane layer (13) on thermal-insulated cotton layer (12) constitute, its characterized in that: the needle felt structure is characterized by further comprising two pairs of clamping plates (1) which are arranged at two sides of the side edge of the multilayer needle felt structure and used for clamping and fixing, clamping holes (2) which are arranged on the exposed ends of the clamping plates (1), bolts (3) and nuts (4) which are inserted into the clamping holes (2), a rotating plate unit (5) which is arranged on the PTFE film coating layer (13) in a bonding mode and used for increasing the structural stability of the multilayer needle felt in a manner of rotationally pressing the nuts (4) after being hinged, a fixing plate unit (6) which is arranged on the PTFE film coating layer (13) in a bonding mode and used for fixing the rotating plate unit (5) in a rotating and inserting mode, the extension sliding sleeve unit (7) is sleeved on the rotating plate unit (5) and is used for being inserted and fixed with the fixed plate unit (6) in an axial extension mode;
the rotating plate unit (5) comprises a mounting plate (501) which is bonded on the PTFE film coating layer (13), a rotating pressing plate (502) with an end hinged on the side surface of the mounting plate (501) and used for pressing the screw cap (4), and an axial channel (503) which is arranged on the annular surface of the rotating pressing plate (502) and used for inserting and mounting the elongated sliding sleeve unit (7); the fixing plate unit (6) comprises a plate body (601) which is bonded on the PTFE coating layer (13), and a fixing insertion hole (602) which is arranged on the plate body (601) and corresponds to the rotary pressing plate (502) which is horizontally placed in a rotating way; the extension sliding sleeve unit (7) comprises an insertion column (701) with the inner side end inserted into the axial channel (503), and an arc sleeve body (702) which is arranged on the outer side end of the insertion column (701), is in annular fit with the rotary pressing plate (502) and is used for being inserted and fixed with the fixing insertion hole (602) after sliding;
the extension sliding sleeve unit (7) further comprises a fixing plate (703) bonded to the PTFE coated layer (13), a fixed magnet block (704) disposed on the fixing plate (703), and a sleeve magnet block (705) bonded to the outer circumferential surface of the arc sleeve body (702) and axially fixing the arc sleeve body (702) by attracting the fixed magnet block (704) by magnetic force.
2. The PTFE coated needled felt according to claim 1, characterized in that: the rotating plate unit (5) further comprises an annular groove (504) which is arranged on the annular surface of the rotating pressing plate (502), communicated with the axial groove (503) and used for annular rotation of the inserting column (701) after axial sliding, the inner surfaces of the axial groove (503) and the annular groove (504) are both arc-shaped, the outer annular surface of the arc-shaped sleeve body (702) is attached to the inner annular surface of the fixing insertion hole (602) after rotating on the annular groove (504), and the inner side end of the inserting column (701) is a sphere which is embedded in the axial groove (503) and the annular groove (504) and is limited in annular clamping.
3. The PTFE coated needled felt according to claim 1, characterized in that: plate body (601) are close to be equipped with plate body magnet piece (8) on the side of nut (4), be equipped with ring channel (9) on nut (4) annular side, embedded be equipped with in ring channel (9) through with plate body magnet piece (8) carry out the hoop magnetic force attraction mode in order to be used for the increase nut (4) loosen magnet ring (10) of rolling back the resistance.
4. The PTFE coated needled felt according to claim 3, characterized in that: the sleeve body magnet block (705) and the insertion column (701) are arranged at the middle position in the axial direction of the arc sleeve body (702), and the annular groove channel (504) is vertically aligned with the magnet ring (10) ring body after the rotary pressing plate (502) is rotated and leveled.
5. The PTFE coated needled felt according to claim 2, characterized in that: the axial channel (503) and the circumferential channel (504) each comprise a rectangular notch arranged outside the inner face of the arc-shaped groove and used for the insertion column (701) to pass through.
6. The PTFE coated needled felt according to claim 5, characterized in that: the paper of the ball is larger than the opening width of the rectangular notch.
7. The PTFE coated needled felt according to claim 1, characterized in that: the two pairs of the rotating plate units (5), the fixing plate units (6) and the extension sliding sleeve units (7) are symmetrically arranged at the positions of two sides of the clamping hole (2), and the multilayer needled felt structure is provided with four pairs of the bolts (3) and the nuts (4).
8. The PTFE coated needled felt according to claim 1, characterized in that: and the clamping plate (1) is provided with a mounting hole (14) for mounting the multi-layer needled felt structure at the position outside the clamping hole (2).
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| CN201910334994.3A CN110027279B (en) | 2019-04-24 | 2019-04-24 | PTFE tectorial membrane acupuncture felt |
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| CN201910334994.3A CN110027279B (en) | 2019-04-24 | 2019-04-24 | PTFE tectorial membrane acupuncture felt |
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| CN110027279B true CN110027279B (en) | 2020-10-20 |
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| JP5361557B2 (en) * | 2009-06-18 | 2013-12-04 | キヤノン株式会社 | Resin composition and fixing member using the same |
| CN108654212A (en) * | 2018-05-25 | 2018-10-16 | 浙江绿净环保科技股份有限公司 | A kind of PTFE coated filter materials |
| CN109291586A (en) * | 2018-12-11 | 2019-02-01 | 江苏宏纬工业用布有限公司 | A kind of efficient voltolisation vinyl chloride base fabric |
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