CN213013683U - Multi-layer composite high-linear-pressure-resistant papermaking felt - Google Patents
Multi-layer composite high-linear-pressure-resistant papermaking felt Download PDFInfo
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- CN213013683U CN213013683U CN202020552170.1U CN202020552170U CN213013683U CN 213013683 U CN213013683 U CN 213013683U CN 202020552170 U CN202020552170 U CN 202020552170U CN 213013683 U CN213013683 U CN 213013683U
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Abstract
The application discloses a multilayer composite high-linear-pressure-resistant papermaking felt, wherein the multilayer composite high-linear-pressure-resistant papermaking felt comprises a bottom fiber layer, a base fabric layer, an inner fiber layer and a surface fiber layer, wherein the bottom fiber layer, the base fabric layer, the inner fiber layer and the surface fiber layer are arranged in a stacked mode; the base cloth layer comprises at least two single-layer base cloth layers. The base cloth layer comprises at least two layers of single-layer base cloth, the multi-layer composite papermaking felt is formed by compounding the single-layer base cloth of a plurality of warp and weft organization systems, upper-layer organization warp yarns are not easy to be embedded into gaps of lower-layer organization warp yarns, the resilience performance is good after high-speed line pressing, the water containing space is high, the deformation is not easy, the water filtering performance is not lost, the moisture in paper sheets is favorably and quickly transferred to the papermaking felt, the dehydration requirement of a high-speed line paper pressing machine on the papermaking felt is met, and the service life of the papermaking felt is prolonged.
Description
Technical Field
The application belongs to the technical field of papermaking industry, and particularly relates to a multi-layer composite high-line-pressure-resistant papermaking felt.
Background
Papermaker's felts are essential consumables of the press section of a paper machine, and function to provide a resilient, permeable support to maximize sheet dewatering, modify the sheet surface, and transport the wet sheet through the nip and press section.
With the continuous development of the paper making industry, the paper making process and equipment develop towards a wide, high-speed, new paper machine structure and better paper web performance, in order to improve the running efficiency and efficiency of a press part of the paper machine, wide press forms such as a shoe press type press form and a large roll diameter press form are widely applied, the line pressure borne by the press forms is generally more than 800KN/m, therefore, higher requirements are put on a paper making felt, the paper making felt is required to meet the requirements of smoothness, water permeability and strength of the felt surface, and the paper making felt also has good compression resilience, namely, the paper making felt is required to be normally used, the paper making felt can still return to a certain thickness after leaving the press form, so that a certain water containing space is ensured, and a large amount of water transferred from paper pages is received. Otherwise, the papermaking felt is compacted quickly under the repeated action of high linear pressure, the water containing space is reduced, the water permeability is reduced, and the papermaking requirement cannot be met.
Disclosure of Invention
The application provides a compound resistant high linear pressure papermaking felt of multilayer to solve the not enough problem of papermaking felt compression resilience performance.
In order to solve the technical problem, the application adopts a technical scheme that: a multi-layer composite high-wire-pressure-resistant papermaking felt comprises a bottom layer fiber layer, a base cloth layer, an inner layer fiber layer and a surface layer fiber layer which is in contact with paper, wherein the bottom layer fiber layer, the base cloth layer, the inner layer fiber layer and the surface layer fiber layer are arranged in a stacked mode; the base cloth layer comprises at least two single-layer base cloth layers.
According to an embodiment of the application, the base cloth layer includes three-layer individual layer base cloth, three-layer individual layer base cloth by top layer fibrous layer extremely bottom layer fibrous layer is upper base cloth, middle level base cloth and lower floor's base cloth in proper order.
According to an embodiment of the present application, the weave structure of the upper base fabric is 1/1 or 1/3 weave structure, and the weave structure of the middle base fabric and/or the lower base fabric is 1/1, 1/3 or 2/2 weave structure.
According to an embodiment of the application, the warp of upper base cloth, middle level base cloth and lower floor's base cloth is the monofilament, the weft of upper base cloth, middle level base cloth and lower floor's base cloth is monofilament or strand.
According to an embodiment of the present application, the warp density of the single-layer base fabric is 240 pieces/10 CM, and the weft density of the single-layer base fabric is 180 pieces/10 CM.
According to an embodiment of the application, the fineness of the fiber material of the surface fiber layer is smaller than that of the fiber material of the bottom fiber layer, and the fineness of the fiber material of the surface fiber layer is smaller than that of the fiber material of the inner fiber layer.
According to one embodiment of the application, the fineness of the fiber material of the surface fiber layer is 6-20D; the fineness of the fiber material of the inner fiber layer is 20-60D; the fineness of the fiber material of the bottom fiber layer is 30-60D.
According to an embodiment of the present application, the fibrous material of the bottom fibrous layer comprises 10% bicomponent fibers.
According to an embodiment of the present application, the warp threads of the upper base fabric, the middle base fabric and the lower base fabric have a diameter of 0.25mm to 0.40 mm.
According to an embodiment of the present application, the warp material of the upper base fabric, the middle base fabric and the lower base fabric is nylon.
The beneficial effect of this application is: the multilayer composite papermaking felt is formed by compounding single-layer base cloth of a plurality of independent warp and weft organization systems, the upper-layer organization warp is not easy to be embedded into the gap of the lower-layer organization warp under the repeated action of high line pressure under the felt, the resilience is good, the deformation is not easy, the water containing space is high, the water filtering performance cannot be lost, the moisture in paper sheets is favorably transferred to the papermaking felt quickly, the dehydration requirement of a high-speed line paper pressing machine on the papermaking felt is met, and the service life of the papermaking felt is prolonged. In addition, the shrinkage rate is small in the manufacturing process of the papermaking felt, the gram weight and the air permeability are easy to control, and the size is relatively stable in the use process of a paper mill.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, it is obvious that the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without inventive efforts, wherein:
FIG. 1 is a schematic cross-sectional view of an embodiment of a multi-layer composite high wire pressure resistant papermaking felt of the present application;
FIG. 2 is a schematic flow chart of an embodiment of a method for making a multi-layer composite high wire pressure resistant papermaking felt according to the present application.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
Referring to fig. 1, fig. 1 is a schematic cross-sectional view of an embodiment of a multi-layer composite high-wire-pressure-resistant papermaking felt according to the present application.
The multi-layer composite high wire-pressure-resistant papermaking felt 100 according to an embodiment of the present invention includes a bottom fiber layer 110, a base fabric layer 120, an inner fiber layer 130, and a surface fiber layer 140 contacting paper. The inner layer fiber layer 130 and the bottom layer fiber layer 110 are respectively located on two sides of the base fabric layer 120, the surface layer fiber layer 140 is located on the outer side of the inner layer fiber layer 130, and during papermaking, a papermaking felt 100 is respectively arranged on the upper side and the lower side of a piece of paper, and the surface layer fiber layer 140 of the papermaking felt 100 is directly contacted with the surface of the paper. The base fabric layer 120 includes at least two single-layer base fabrics, and the multi-layer composite papermaking felt 100 of the present application is actually formed by compounding single-layer base fabrics of a plurality of warp and weft weave systems, and has good resilience performance after being subjected to high linear pressure. The upper layer tissue warp yarns are not easy to be embedded into the gaps of the lower layer tissue warp yarns, the papermaking felt 100 has good resilience, high water containing space and no possibility of deformation, and the water filtering performance cannot be lost, so that the moisture in the paper sheets can be quickly transferred to the papermaking felt 100, the dehydration requirement of the high-speed wire-drawing press on the papermaking felt 100 is met, and the service life of the papermaking felt 100 is prolonged.
In one embodiment, the base fabric layer 120 includes three single-layer base fabrics, which are an upper base fabric 121, a middle base fabric 122 and a lower base fabric 123 in sequence from the surface fiber layer 140 to the bottom fiber layer 110. The structure that three-layer individual layer base cloth range upon range of setting is more reasonable, and papermaking felt 100 resilience is good, holds the water space height, and non-deformable just can not lose drainage performance, satisfies the dehydration requirement of high-speed altitude nipper to papermaking felt 100 to improve papermaking felt 100's life. In other embodiments, the base fabric layer 120 may also include two, four, or other number of single-layer base fabrics, without limitation.
In one embodiment, the weave structure of the upper base fabric 121 is a weft weave structure of 1/1, and in other embodiments, the upper base fabric 121 may also be a weft weave structure of 1/3. The weave structure of the middle base cloth 122 and/or the lower base cloth 123 is 1/3, and in other embodiments, the weave structure of the middle base cloth 122 and/or the lower base cloth 123 may also be 1/1, 2/2 weave structures, which is not limited herein. The same or different kinds of base fabrics may be used for the middle layer base fabric 122 and the lower layer base fabric 123. In general, the upper base fabric 121 has a high flatness and a high tightness as a whole, and the lower base fabric 123 has a high water permeability as a whole.
In one embodiment, the warp threads of the upper base fabric 121, the warp threads of the middle base fabric 122 and the warp threads of the lower base fabric 123 are all monofilaments; the wefts of the upper base fabric 121 are monofilaments or strands, and the wefts of the middle base fabric 122 or the lower base fabric 123 are monofilaments or strands. For the sake of difference, the warp threads in the upper base fabric 121 are referred to as first warp threads 1211, and the weft threads in the upper base fabric 121 are referred to as first weft threads 1212; the warp threads of the middle base cloth 122 are the second warp threads 1221, and the weft threads of the middle base cloth 122 are the second weft threads 1222; the warp threads in the lower base fabric 123 are the third warp threads 1231, and the weft threads of the lower base fabric 123 are the third weft threads 1232. Since the upper base fabric 121 is closer to the surface fiber layer 140 than the lower base fabric 123, the density of the first warp 1211 is less than that of the third warp 1231, and the density of the first weft 1212 is less than that of the third weft 1232.
Specifically, the first warp 1211 is made of 0.25mm-0.40mm chinlon monofilament, and the density of the first warp 1211 is 240 pieces/10 CM; the first weft 1212 is monofilament or 0.2-0.4 × 2 × 4 nylon yarn (strand is formed by twisting 1 strand or 4 strands of sub-strands, each sub-strand is formed by twisting 2 monofilaments with a diameter of 0.2-0.4mm, such as 0.2mm, 0.3mm or 0.4mm), and the density of the first weft 1212 is 180 plus 280/10 CM, such as 180 plus 10CM, 230 plus 10CM or 280 plus 10 CM. The second warp 1221 is made of 0.25-0.4mm nylon monofilament, and the density of the second warp 1221 is 280 pieces/10 CM, for example, 220 pieces/10 CM, 250 pieces/10 CM or 280 pieces/10 CM. The second weft 1222 is made of 0.2-0.4mm nylon monofilament (e.g. 0.2mm, 0.3mm, or 0.4mm, etc.), or 0.2 × 2 × 4 nylon yarn (the yarn is formed by twisting 4 sub-yarns, each sub-yarn is formed by twisting 2 monofilaments with a diameter of 0.2 mm), and the density of the second weft 1222 is 180/280 CM, e.g. 180/10 CM, 230/10 CM, or 280/10 CM. The third warp 1231 is nylon monofilament with a thickness of 0.25-0.4mm, and the density of the third warp 1231 is 280 pieces/10 CM, such as 220 pieces/10 CM, 250 pieces/10 CM or 280 pieces/10 CM. The third weft 1232 is selected from 0.2-0.4mm nylon monofilament (e.g., 0.2mm, 0.3mm, or 0.4mm, etc.), or 0.2 × 2 × 4 nylon strand (strand is formed by twisting 4 sub-strands, each sub-strand is formed by twisting 2 monofilaments with a diameter of 0.2 mm), and the density of the third weft 1232 is 180 + 280/10 CM, e.g., 180/10 CM, 230/10 CM, or 280/10 CM. The middle base fabric 122 and the lower base fabric 123 may use the same single-layer base fabric. The warp and weft of the upper base cloth 121, the middle base cloth 122 and the lower base cloth 123 are reasonably matched in thickness, the whole structure of the base cloth layer 120 is compact and stable, the compression resilience is good, the base cloth layer is not easy to deform and compact, and the water-containing void ratio is stable.
In one embodiment, the bottom fiber layer 110, the inner fiber layer 130, and the surface fiber layer 140 are prepared by carding the fiber material into a single piece of fleece by a carding machine, laminating the layers, and needling the fleece by a pre-needling machine to form the bottom fiber layer 110, the inner fiber layer 130, and the surface fiber layer 140.
Considering that the roughness of the surface layer 140 affects the flatness of the surface of the papermaking felt 100, the thinner the material is, the flatter the papermaking felt 100 is, the thicker the material thickness of the inner layer 130 affects the drainage effect of the papermaking felt 100, the thicker the material is, the greater the air permeability and drainage performance of the papermaking felt 100 is, and the roughness of the bottom layer 110 affects the friction performance between the papermaking felt 100 and the papermaking machine parts, therefore, in order to ensure that the papermaking felt 100 has reasonable air permeability, the felt fibers are wear-resistant on the papermaking machine and meet the flatness requirements of the surface, the roughness of the inner layer 130 is generally greater than that of the bottom layer 110, and the roughness of the bottom layer 110 is greater than that of the surface layer 140. For example, when the bottom fiber layer 110, the inner fiber layer 130, and the surface fiber layer 140 are all made of nylon fibers, the thickness of the nylon fibers of the inner fiber layer 130 is greater than that of the nylon fibers of the bottom fiber layer 110, and the thickness of the nylon fibers of the bottom fiber layer 110 is greater than that of the nylon fibers of the surface fiber layer 140. In an application scenario, the inner fiber layer 130 is made of 20D (Dtex) -60D nylon fibers, for example, 20D, 40D, 50D or 60D nylon fibers, the bottom fiber layer 110 is made of 30D-60D nylon fibers, for example, 30D, 45D or 60D nylon fibers, and the front fiber layer is made of 6D-20D nylon fibers, for example, 6D, 13D or 20D nylon fibers. It should be noted that in other application scenarios, materials with appropriate thicknesses may be selected for the bottom fiber layer 110, the inner fiber layer 130, and the surface fiber layer 140 in combination with other properties such as air permeability.
Furthermore, the fiber materials of the surface fiber layer 140, the inner fiber layer 130 and the bottom fiber layer 110 all comprise 10-30% of bicomponent fibers, and the melting point of the bicomponent fibers is 120-150 ℃, which is lower than the melting points of the rest fiber materials in the surface fiber layer 140, the inner fiber layer 130 and the bottom fiber layer 110. Thereby melting a portion of the bicomponent fibers during the heat setting process, and further causing the melted bicomponent fibers to cohere with the remaining fiber material between the fiber layers of the same layer, while cohering between the adjacent fiber layers and the base fabric layer 120.
Referring to fig. 2, fig. 2 is a schematic flow chart of an embodiment of a method for manufacturing a multi-layer composite high-wire-pressure-resistant papermaking felt according to the present application.
Another embodiment of the present application provides a method for manufacturing a papermaking felt 100, which specifically includes:
s101: forming a base fabric layer 120.
The base fabric layer 120 is woven, and the specific structure of the base fabric layer 120 is described in the above embodiments, which are not described herein again. The base fabric layer 120 includes at least two single-layer base fabrics, and the multi-layer composite papermaking felt 100 of the present application is actually formed by compounding single-layer base fabrics of a plurality of warp and weft weave systems, and has good resilience performance after being subjected to high linear pressure. The upper layer tissue warp yarns are not easy to be embedded into the gaps of the lower layer tissue warp yarns, the papermaking felt 100 has good resilience, high water containing space and no possibility of deformation, and the water filtering performance cannot be lost, so that the moisture in the paper sheets can be quickly transferred to the papermaking felt 100, the dehydration requirement of the high-speed wire-drawing press on the papermaking felt 100 is met, and the service life of the papermaking felt 100 is prolonged.
Further, the base fabric layer 120 is stretched and set by hot oil. Specifically, the base fabric layer 120, which is previously woven, is wound on a hot roll during preparation, circulated oil is stored inside the hot roll, the temperature of the surface of the hot roll is increased by heating the oil inside the hot roll, and then the base fabric layer 120 wound on the hot roll is stretched by a stretching device to set the base fabric layer 120. In this application scenario, the oil inside the hot roller is heated to ensure the temperature of the surface of the hot roller, and because the oil has fluidity, the temperature difference of the surface of the hot roller is small, the temperature is uniform, so that the temperature of the surface of the base fabric layer 120 is also uniform, the overall structure of the base fabric layer 120 subjected to the shaping treatment is stable, the stable structure of the papermaking felt 100 is ensured, and the deformation amount on the papermaking machine is small.
S102: the back fiber layer 130 and the surface fiber layer 140 are formed in this order on one side of the base fabric layer 120, and the back fiber layer 110 is formed on the other side of the base fabric layer 120.
The back fiber layer 130 and the surface fiber layer 140 are formed on one side of the base fabric layer 120 by needle punching and flocking in sequence, and the bottom fiber layer 110 is formed on the other side of the base fabric layer 120 by needle punching and flocking. Wherein, the fiber materials of the surface fiber layer 140, the inner layer fiber layer 130 and the bottom fiber layer 110 all comprise 10-30% of bicomponent fiber, and the melting point of the bicomponent fiber is 120-150 ℃.
S103: and (5) performing pressurized oil hot roller setting treatment.
The semi-finished papermaking felt 100 formed in the step S102 is subjected to pressurized oil hot roller setting treatment, and part of the bicomponent fibers are melted in the heat setting treatment, so that the melted bicomponent fibers are cohered with other fiber materials between fiber layers on the same layer, and meanwhile, the adjacent fiber layers and the base fabric layer are cohered, so that the papermaking felt surface is not prone to fluffing, and the semi-finished papermaking felt 100 has long stable performance and long service life. Specifically, the semi-finished papermaking felt 100 may be oiled and heat-set by winding the semi-finished papermaking felt on a hot roll, or the semi-finished papermaking felt 100 may be rolled on the hot roll for heat-setting, which is not limited herein.
Further, the papermaking felt 100 is soaked and softened with an alkaline detergent, and then washed and dried. The soaking softening time may be 1 hour, 2 hours or 3 hours, which is not limited herein. The felt 100 after being washed and softened has improved initial performance.
The above description is only an example of the present application and is not intended to limit the scope of the present application, and all modifications of equivalent structures and equivalent processes, which are made by the contents of the specification and the drawings, or which are directly or indirectly applied to other related technical fields, are intended to be included within the scope of the present application.
Claims (8)
1. A multi-layer composite high-wire-pressure-resistant papermaking felt is characterized by comprising a bottom layer fiber layer, a base cloth layer, an inner layer fiber layer and a surface layer fiber layer which is in contact with paper, wherein the bottom layer fiber layer, the base cloth layer, the inner layer fiber layer and the surface layer fiber layer are arranged in a stacked mode;
the base cloth layer comprises three layers of single-layer base cloth, and the three layers of single-layer base cloth sequentially comprise an upper layer base cloth, a middle layer base cloth and a lower layer base cloth from the surface layer fiber layer to the bottom layer fiber layer;
the fabric weave structure of the upper base cloth is 1/1 or 1/3 weave structure, and the fabric weave structure of the middle base cloth and/or the lower base cloth is 1/1, 1/3 or 2/2 weave structure.
2. The papermaking felt according to claim 1, wherein the warp threads of the upper base fabric, the middle base fabric and the lower base fabric are monofilaments, and the weft threads of the upper base fabric, the middle base fabric and the lower base fabric are monofilaments or plied yarns.
3. The papermaking felt according to claim 1, wherein the single-layer base fabric has a warp density of 240 threads/10 cm and a weft density of 180 threads/10 cm.
4. The papermaking felt according to claim 1, wherein the fineness of the fiber material of the top fiber layer is smaller than the fineness of the fiber material of the bottom fiber layer, and the fineness of the fiber material of the top fiber layer is smaller than the fineness of the fiber material of the back fiber layer.
5. The papermaking felt according to claim 1, wherein the fineness of the fiber material of the surface fiber layer is 6 to 20D; the fineness of the fiber material of the inner fiber layer is 20-60D; the fineness of the fiber material of the bottom fiber layer is 30-60D.
6. The papermaking felt according to claim 1, wherein the fibrous material of the bottom layer of fibers comprises 10% bicomponent fibers.
7. The papermaking felt according to claim 2, wherein the warp threads of the upper base fabric, the middle base fabric and the lower base fabric have a thread diameter of 0.25mm to 0.40 mm.
8. The papermaking felt according to claim 7, wherein the warp materials of the upper base fabric, the middle base fabric and the lower base fabric are nylon.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202020552170.1U CN213013683U (en) | 2020-04-14 | 2020-04-14 | Multi-layer composite high-linear-pressure-resistant papermaking felt |
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| CN202020552170.1U CN213013683U (en) | 2020-04-14 | 2020-04-14 | Multi-layer composite high-linear-pressure-resistant papermaking felt |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111424459A (en) * | 2020-04-14 | 2020-07-17 | 江苏金呢工程织物股份有限公司 | Multi-layer composite high-wire-pressure-resistant papermaking felt and preparation method thereof |
| CN113174772A (en) * | 2021-05-11 | 2021-07-27 | 江苏金呢工程织物股份有限公司 | Papermaking felt, preparation method of papermaking felt and papermaking machine equipment |
-
2020
- 2020-04-14 CN CN202020552170.1U patent/CN213013683U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111424459A (en) * | 2020-04-14 | 2020-07-17 | 江苏金呢工程织物股份有限公司 | Multi-layer composite high-wire-pressure-resistant papermaking felt and preparation method thereof |
| CN113174772A (en) * | 2021-05-11 | 2021-07-27 | 江苏金呢工程织物股份有限公司 | Papermaking felt, preparation method of papermaking felt and papermaking machine equipment |
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