CN113174772A - Papermaking felt, preparation method of papermaking felt and papermaking machine equipment - Google Patents
Papermaking felt, preparation method of papermaking felt and papermaking machine equipment Download PDFInfo
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- CN113174772A CN113174772A CN202110513121.6A CN202110513121A CN113174772A CN 113174772 A CN113174772 A CN 113174772A CN 202110513121 A CN202110513121 A CN 202110513121A CN 113174772 A CN113174772 A CN 113174772A
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Images
Classifications
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F7/00—Other details of machines for making continuous webs of paper
- D21F7/08—Felts
- D21F7/083—Multi-layer felts
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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
- B32B5/02—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 structural features of a fibrous or filamentary layer
-
- 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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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D13/00—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft
-
- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D13/00—Woven fabrics characterised by the special disposition of the warp or weft threads, e.g. with curved weft threads, with discontinuous warp threads, with diagonal warp or weft
- D03D13/002—With diagonal warps or wefts
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- D—TEXTILES; PAPER
- D03—WEAVING
- D03D—WOVEN FABRICS; METHODS OF WEAVING; LOOMS
- D03D15/00—Woven fabrics characterised by the material, structure or properties of the fibres, filaments, yarns, threads or other warp or weft elements used
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- D—TEXTILES; PAPER
- D21—PAPER-MAKING; PRODUCTION OF CELLULOSE
- D21F—PAPER-MAKING MACHINES; METHODS OF PRODUCING PAPER THEREON
- D21F3/00—Press section of machines for making continuous webs of paper
- D21F3/02—Wet presses
-
- 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
- B32B2250/00—Layers arrangement
- B32B2250/20—All layers 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
- 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
- B32B2262/0261—Polyamide fibres
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- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Paper (AREA)
Abstract
The application discloses a papermaking felt, a preparation method of the papermaking felt and papermaking machine equipment, wherein the papermaking felt is defined with a main body part and edge parts positioned on two side edges of the main body part, and comprises a base cloth layer and a fiber layer which are arranged in a laminated mode; wherein the thickness of the fiber layer of the edge part is larger than that of the fiber layer of the main body part. Through the mode, this application can prevent that the limit of papermaking felt from being ground rotten or appearing the phenomenon of buckling.
Description
Technical Field
The application relates to the technical field of spinning, in particular to a papermaking felt, a preparation method of the papermaking felt and papermaking machine equipment.
Background
Papermaking felts are indispensable consumables in the press section of a paper machine, and papermaking felts made of different raw materials, weaving methods and manufacturing processes have different effects on the smoothness of the surface of paper.
The special paper has high requirements on the papermaking felt, and the papermaking felt applied to the special paper machine has low gram weight and thin thickness, so that the deviation rectification process of the paper machine is easy to be broken, and the edge part of the paper machine is easy to be worn down.
Disclosure of Invention
The technical problem that this application mainly solved provides a papermaking felt, papermaking felt's preparation method and paper machine equipment, can prevent that the limit of papermaking felt from being ground rotten or appearing the phenomenon of kinking.
In order to solve the technical problem, the application adopts a technical scheme that: providing a papermaking felt, wherein the papermaking felt is defined with a main body part and edge parts positioned at two side edges of the main body part, and the papermaking felt comprises a base cloth layer and a fiber layer which are arranged in a laminating way; wherein the thickness of the fiber layer of the edge part is larger than that of the fiber layer of the main body part.
Wherein, the papermaking felt at least comprises a surface layer fiber layer, a base cloth layer and a bottom layer fiber layer which are sequentially stacked; the edge part also comprises a reinforcing layer which is arranged on one side of the surface layer fiber layer far away from the base cloth layer.
Wherein the reinforcing layer comprises a reinforcing fiber layer.
Wherein, the fiber raw material of the reinforced fiber layer comprises nylon fiber; wherein the gram weight of the nylon fiber is 145-155g/m2(ii) a And/or the fineness of the nylon fiber is 10D-20D.
The base cloth layers at least comprise a first base cloth layer and a second base cloth layer, and the first base cloth layer and the second base cloth layer are arranged in a laminated mode; wherein the weave structure of the first base fabric layer comprises an 1/3 or 1/5 weft repeat; and/or the weave structure of the second scrim layer comprises 1/2 twill weave; and/or the first base cloth layer is formed by weaving first warps and first wefts, the first warps are monofilaments, and the first wefts are plied yarns; and/or the second base cloth layer is formed by weaving second warps and second wefts, the second warps are monofilaments and/or plied yarns, and the second wefts are plied yarns; and/or the raw material of the first warp comprises nylon monofilament, the raw material of the first weft and the raw material of the second weft comprise nylon strand, and the raw material of the second warp comprises the nylon monofilament and/or the nylon strand; and/or the fineness of the nylon monofilament is 500D-950D, and the fineness of the nylon plied yarn is 1400D.
The papermaking felt at least comprises a surface layer fiber layer, a base cloth layer and a bottom layer fiber layer which are sequentially stacked, wherein the surface layer fiber layer comprises a surface layer fiber layer and an inner layer fiber layer, and the inner layer fiber layer is arranged between the surface layer fiber layer and the base cloth layer; the fiber fineness of the inner fiber layer is greater than that of the surface fiber layer, and the fiber fineness of the inner fiber layer is greater than or equal to that of the bottom fiber layer.
The fiber fineness of the surface fiber layer is 3D-10D, the fiber fineness of the inner fiber layer is 25D-30D, and the fiber fineness of the bottom fiber layer is 20D-30D.
In order to solve the above technical problem, another technical solution adopted by the present application is: the preparation method of the papermaking felt comprises the following steps: providing a base cloth layer, wherein the base cloth layer is defined with a main body part and edge parts positioned at two side edges of the main body part; and forming fiber layers on the main body part and the edge part of the base cloth layer, wherein the thickness of the fiber layer on the edge part is larger than that of the fiber layer on the main body part.
Wherein, forming the fiber layer on the main body part and the edge part of the base cloth layer comprises: respectively needling the two sides of the base fabric layer to form a surface layer fiber layer and a bottom layer fiber layer; and needling the edge part of the surface layer fiber layer far away from the base cloth layer to form a reinforced fiber layer.
Wherein the reinforcing fiber layer is subjected to a needling treatment.
In order to solve the above technical problem, another technical solution adopted by the present application is: there is provided a papermaking machine comprising the papermaking felt described above.
The beneficial effect of this application is: the present application provides a papermaking felt, a method for manufacturing the papermaking felt, and a papermaking machine apparatus, in which the papermaking felt defines a main body portion and edge portions located at both side edges of the main body portion, and the papermaking felt includes a base fabric layer and a fiber layer which are stacked; wherein the thickness of the fiber layer of the edge part is larger than that of the fiber layer of the main body part. The thickness of the edge part is increased relative to the main body part, so that the stiffness of the edge part is increased, and the papermaking felt is not easy to be worn down when running on a papermaking machine; and, because the paper machine is the high-speed operation, the position skew phenomenon can appear in the papermaking felt when using repeatedly, and the increase of limit portion thickness can avoid the flange ware to appear the phenomenon of buckling at the papermaking felt of rectifying in-process.
Drawings
FIG. 1 is a cross-sectional schematic view of an embodiment of a papermaker's felt provided herein;
FIG. 2 is a schematic perspective view of an embodiment of a papermaker's felt provided herein;
FIG. 3 is a schematic view of a weave construction of one embodiment of the first base fabric layer shown in FIG. 2;
FIG. 4 is a schematic view of the weave structure of one embodiment of the second base fabric layer shown in FIG. 2;
FIG. 5 is a schematic flow chart diagram illustrating one embodiment of a method of making a papermaker's felt according to the present application;
FIG. 6 is a schematic view of a process for forming a fibrous layer on the main portion and the edge portion of the base fabric layer in the method of making a papermaker's felt according to the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the embodiments of the present application, and it is obvious that the described embodiments are some but not all of the embodiments of the present application. 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. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
It should be noted that if a description of "first", "second", etc. is provided in this application, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present application.
In summary, the present application provides a papermaking felt, a method of manufacturing the papermaking felt, and a papermaking machine apparatus, the papermaking felt defining a main body portion and edge portions at both side edges of the main body portion, the papermaking felt including a base fabric layer and a fiber layer arranged in a stacked manner; wherein the thickness of the fiber layer of the edge part is larger than that of the fiber layer of the main body part. The thickness of the edge part is increased relative to the main body part, so that the stiffness of the edge part is increased, and the papermaking felt is not easy to be worn down when running on a papermaking machine; and, because the paper machine is the high-speed operation, the position skew phenomenon can appear in the papermaking felt when using repeatedly, and the increase of limit portion thickness can avoid the flange ware to appear the phenomenon of buckling at the papermaking felt of rectifying in-process.
Referring to fig. 1, fig. 1 is a schematic sectional view of an embodiment of a papermaking felt provided in the present application. The present application provides a papermaking felt 100, and the papermaking felt 100 can be used for paper forming, wet paper press dewatering, conveyance, and the like. The papermaking felt 100 may be a wet felt, an upper felt or a dry felt, and may be specifically arranged according to an actual use scenario, which is not specifically limited herein. For convenience of description, the technical solution of the present application will be described by taking the papermaking felt 100 as a wet felt as an example, but the present application is not limited thereto.
In one embodiment, the papermaker's felt 100 is used in a specialty paper machine for dewatering and sheet forming processes, etc. of a specialty paper sheet. The special paper is paper with different fibers made into paper with special functions by a paper machine, and is paper with special application and low yield, so the special paper has high requirement on the surface flatness of the paper sheet compared with common paper, and the paper making felt 100 on the special paper machine is required to have low gram weight and thin thickness, and the edge of the paper making felt 100 with low gram weight and thin thickness is easy to be worn out and easy to have a folding phenomenon in the deviation rectifying process. In other embodiments, the papermaking felt 100 can be applied to a papermaking machine for manufacturing other paper sheets, and is not particularly limited thereto.
With continued reference to fig. 1, the papermaker's felt 100 defines a main portion 110 and edge portions 130 at opposite side edges of the main portion 110. The main body 110 is used for pressing and dewatering a paper sheet in a water-carrying operation on a paper machine, and meanwhile, the surface smoothness of the paper sheet is modified to be smooth; the edge portions 130 are located at two side edges of the main body portion 110, so as to enhance the stiffness of the edge portion of the papermaking felt 100 and prevent the bending phenomenon during the deviation rectification process of the papermaking felt 100.
The papermaking felt 100 includes the base fabric layer 10 and the fiber layer 30 which are arranged in a stacked manner. The base fabric layer 10 is equivalent to a skeleton of the papermaking felt 100, and plays a role of supporting the fiber layer 30 and providing the papermaking felt 100 with a certain strength, so that the papermaking felt 100 is not easily broken when being subjected to a traction force of a paper machine; the fiber layer 30 can be regarded as a fiber net attached to the base fabric layer 10, and can absorb moisture of the paper sheet to dewater the paper sheet, and can modify the surface of the paper sheet to make the surface of the paper sheet flat and smooth.
Wherein the thickness of the fiber layer 30 at the edge portion 130 is greater than the thickness of the fiber layer 30 of the main body portion 110, so that the thickness of the edge portion 130 is increased compared to the thickness of the main body portion 110, thereby increasing the stiffness of the edge portion 130, and making the edge portion 130 less prone to be worn down when the papermaking felt 100 is operated on a papermaking machine; in addition, because the papermaking machine is operating at high speeds, the increased thickness of the edge portions 130 prevents the edger from folding over the papermaker's felt 100 during deflection correction.
With continued reference to FIG. 1, in one embodiment, the papermaking felt 100 includes at least a top fiber layer 31, a base layer 10, and a bottom fiber layer 33, which are stacked in sequence. In order to make the thickness of the fiber layer 30 at the edge portion 130 greater than that of the fiber layer 30 at the main body portion 110, the edge portion 130 of the papermaking felt 100 further includes a reinforcing layer 35, the reinforcing layer 35 is disposed on the side of the face layer fiber layer 31 away from the base fabric layer 10, and the reinforcing layer 35 is disposed on the side of the face layer fiber layer 31 away from the base fabric layer 10, so that the edge portion 130 is added by one layer relative to the main body portion 110, that is, the thickness of the edge portion 130 is increased relative to the thickness of the main body portion 110, thereby increasing the stiffness of the edge portion 130, preventing the papermaking felt 100 from being worn down when operating on a papermaking machine, and preventing the edge guard from being folded during deviation rectification of the papermaking felt 100. In other embodiments, the reinforcing layer 35 may be disposed on the side of the surface layer fiber layer 31 facing the base fabric layer 10, the side of the bottom layer fiber layer 33 facing away from or facing the base fabric layer 10, or both the side of the surface layer fiber layer 31 facing the base fabric layer 10 and the side of the surface layer fiber layer 31 facing away from the base fabric layer 10, and the like, and may be specifically disposed according to actual use requirements, and is not particularly limited herein. In addition, the number of the reinforcing layers 35 may be specifically set according to actual use requirements, and is not specifically limited herein.
Optionally, in an embodiment, the reinforcing layer 35 is a reinforcing fiber layer. Because the papermaking felt 100 comprises the fiber layer 30, the reinforced fiber layer can be better connected with the fiber layer 30, so that the reinforced fiber layer and the fiber layer 30 of the papermaking felt 100 are more tightly combined, the edge part 130 with the reinforced layer 35 is firmer and firmer, and is not easy to be ground when in use, meanwhile, the water containing space of the papermaking felt 100 is larger due to the addition of the fiber layer 30, and the water filtering performance of the papermaking felt 100 is improved. In other embodiments, the reinforcing layer 35 may also be made of other materials, or may also thicken or reinforce the edge portion 130 in other manners, which may be specifically set according to an actual use scenario or needs, and is not specifically limited herein.
Optionally, in one embodiment, the fiber material for reinforcing the fiber layer has a grammage of 145-155g/m2Nylon fiber with fineness of 10D-20D, mechanical strength and shape stabilityThe strength and stiffness of the edge 130 provided with the reinforcing fiber layer are improved, so that the edge 130 is not easily worn down or broken in the deviation rectifying process when the papermaking felt 100 is used; moreover, the polyamide fiber is alkali-resistant, the slurry mainly containing alkali does not corrode or react with the reinforced fiber layer, and the service life of the papermaking felt 100 is prolonged. In other embodiments, the reinforcing fiber layer may also be made of other fiber raw materials such as polyester fiber or other nylon fibers with other specifications such as gram weight and fineness, and may be specifically arranged according to actual use needs, which is not specifically limited herein.
With continued reference to fig. 1, in one embodiment, the face layer fiber layer 31 includes a face layer fiber layer 311 and a back layer fiber layer 313, and the back layer fiber layer 313 is disposed between the face layer fiber layer 311 and the base layer 10, i.e. the papermaking felt 100 includes at least the face layer fiber layer 311, the back layer fiber layer 313, the base layer 10 and the bottom layer fiber layer 33 which are sequentially stacked, i.e. the base layer 10 is provided with two fiber layers 30 on the side away from the bottom layer fiber layer 33, so as to improve the strength of the face layer fiber layer 31, prevent the face layer fiber layer 31 from being broken in use, and improve the resilience of the face layer fiber layer 31, so that the original state can be recovered after the paper sheet is pressed. In other embodiments, the top fiber layer 31 may also include three or more fiber layers 30, and the bottom fiber layer 33 may also include a plurality of fiber layers 30, which may be specifically disposed according to actual use requirements, and are not specifically limited herein.
Wherein, top fiber layer 311 can with the paper direct contact when using, can decorate the surface smoothness of paper, improve the level and smooth degree on paper surface. The setting is folded with surface course fibre layer 311 to lining fibrous layer 313, exists certain space between lining fibrous layer 313 and the surface course fibrous layer 311, has increased the space in the surface course fibrous layer 31, and the water holding space in the surface course fibrous layer 31 increases promptly to the drainage and the resilience of surface course fibrous layer 31 have been improved, and the strong power of surface course fibrous layer 31 is improved on the whole to the setting of laminating of surface course fibrous layer 311 and lining fibrous layer 313.
Optionally, in an embodiment, the fiber fineness of the inner fiber layer 313 is greater than the fiber fineness of the surface fiber layer 311, and the fiber fineness of the surface fiber layer 311 is smaller than the fiber fineness of the inner fiber layer 313. Because the surface fiber layer 311 is in direct contact with the paper, the fiber fineness of the surface fiber layer 311 is small, and the fibers of the surface fiber layer 311 are thin, so that the surface of the surface fiber layer 311 is smooth and fine, and the surface of the paper modified by the surface fiber layer 311 is smooth and flat; in addition, because the fiber fineness of the inner fiber layer 313 is large, the inner fiber layer 313 has certain strength, so that the strength of the surface fiber layer 31 is improved as a whole, and the surface fiber layer 311 and the inner fiber layer 313 are not pressed into the gap of the surface fiber layer 311 easily, namely, the surface fiber layer 311 and the inner fiber layer 313 cannot be compacted and attached together, so that the surface fiber layer 31 has certain resilience, and the surface fiber layer 311 and the inner fiber layer 313 can be separated to an initial state after paper sheets are extruded.
Optionally, in an embodiment, the fiber fineness of the inner fiber layer 313 is greater than or equal to the fiber fineness of the bottom fiber layer 33, and the fiber fineness of the bottom fiber layer 33 is greater, so that the bottom fiber layer 33 is stronger and firmer, and thus the cohesive force provided by the bottom fiber layer 33 to the surface fiber layer 31 is greater, and the combination of the surface fiber layer 31 and the base fabric layer 10 is firmer.
Optionally, in an embodiment, the surface fiber layer 311, the inner fiber layer 313, and the bottom fiber layer 33 are nylon fibers. In other embodiments, the surface fiber layer 311, the inner fiber layer 313, and the bottom fiber layer 33 may be other fibers, and may be specifically arranged according to actual use requirements, which is not specifically limited herein. The specifications of the fineness, the gram weight and the like of the fiber raw materials of the surface fiber layer 311, the inner fiber layer 313 and the bottom fiber layer 33 are not specifically limited, and the specifications can be specifically set according to actual use requirements. For example, the surface fiber layer 311 is 3D-10D nylon fiber, the inner fiber layer 313 is 25-30D nylon fiber, and the bottom fiber layer 33 is 20D-30D nylon fiber.
Referring to fig. 2, fig. 2 is a schematic perspective view of an embodiment of a papermaking felt provided in the present application. The base fabric layer 10 is woven from warp and weft yarns according to a certain interweaving rule. In one embodiment, the base fabric layer 10 includes at least a first base fabric layer 11 and a second base fabric layer 13, and the first base fabric layer 11 and the second base fabric layer 13 are combined to form the base fabric layer 10. Compared with the single base cloth, the base cloth layer 10 has the advantages that the strength of the base cloth layer 10 can be increased due to the arrangement of the two layers, the surface layer fiber layer 31 can be better supported, the base cloth layer 10 can be prevented from being broken in use, and the first base cloth layer 11 and the second base cloth layer 13 are not completely attached to each other, so that a gap exists between the first base cloth layer 11 and the second base cloth layer 13, the base cloth layer 10 has certain resilience and a water containing space, and the resilience and the water filtration performance of the papermaking felt 100 are increased. In other embodiments, the base fabric layer 10 may be formed by combining three, four or more layers of base fabrics, and may be specifically disposed according to actual use requirements, and is not specifically limited herein.
Referring to fig. 3, fig. 3 is a schematic view of a knitting structure of the first base fabric layer shown in fig. 2 according to an embodiment. In one embodiment, the first base fabric layer 11 is formed by weaving the first warp yarn 111 and the first weft yarn 113 in an 1/3 weft double weave. In other embodiments, the first base fabric layer 11 may be formed by weaving 1/5 weft double weaves or other weaves, and may be specifically arranged according to actual use requirements, which is not limited herein.
Specifically, when the weave structure is a 1/3-weft double weave, the weave structure includes a surface weave and an inner weave, the first weft 113 includes a first front weft 1131 and a first back weft 1133, the first front weft 1131 is interwoven with the first warp 111 to form the surface weave, and the first back weft 1133 is interwoven with the first warp 111 to form the inner weave, that is, the first base fabric layer 11 is interwoven with one warp system, that is, the first warp 111, by the first front weft 1131 and the first back weft 1133 to form the first base fabric layer 11, so that the reverse side of the first base fabric layer 11 is simultaneously lined with two kinds of weft, thereby making the first base fabric layer 11 thick and firm.
Optionally, in an embodiment, the first warp yarn 111 is a 500D-950D nylon monofilament, and the first weft yarn 113 is a 1400D nylon yarn, for example, two nylon monofilaments may be merged to form a nylon yarn, i.e., the first weft yarn 113, or after two nylon monofilaments are merged to form a nylon yarn, the two yarns are merged again to form the first weft yarn 113; the first warp 111 selects monofilament to ensure the smoothness of the surface of the first base fabric layer 11, and the first weft 113 selects plied yarn to ensure that the first base fabric layer 11 has larger strength. In other embodiments, the first warp yarn 111 may also be a nylon monofilament or a nylon yarn of other specifications, the first weft yarn 113 may also be a nylon monofilament or a nylon yarn of other specifications, and the first warp yarn 111 and the first weft yarn 113 may also be monofilaments or yarns of other raw materials such as polyester, which may be specifically arranged according to actual use needs, and are not specifically limited herein.
Referring to fig. 4, fig. 4 is a schematic view of a knitting structure of an embodiment of the second base fabric layer shown in fig. 2. In one embodiment, the second base fabric layer 13 is formed by weaving the second warp 131 and the second weft 133 by using 1/2 twill weave, and the second base fabric layer 13 woven by the twill weave has certain flexibility and strength, and increases the elasticity of the base fabric layer 10 on the premise of ensuring the strength, so that the first base fabric layer 11 and the second base fabric layer 13 are not completely attached together, and can be restored to an initial state after the moisture of paper sheets is squeezed, so as to be continuously used.
Optionally, in an embodiment, the second warp 131 is a nylon monofilament or a nylon strand, and may be specifically arranged according to actual use requirements, and is not specifically limited herein; the second weft 133 is a 1400D nylon ply yarn. In other embodiments, the second weft yarn 133 may also be a nylon monofilament or a nylon yarn with other specifications and sizes, and the second warp yarn 131 and the second weft yarn 133 may also be a monofilament or a nylon yarn made of other raw materials such as polyester, which may be specifically arranged according to actual use requirements, and is not specifically limited herein.
The papermaking felt is defined with a main body part and edge parts positioned at two side edges of the main body part, and comprises a base cloth layer and a fiber layer which are arranged in a laminated manner; wherein the thickness of the fiber layer of the edge part is larger than that of the fiber layer of the main body part. The base cloth layer plays a role in supporting the fiber layer, so that the papermaking felt has certain strength, and the papermaking felt is not easy to break under the traction action of a paper machine; the fiber layer can absorb the moisture of the paper sheet, dewater the paper sheet and modify the surface of the paper sheet to make the surface of the paper sheet smooth. The thickness of the edge part is increased relative to the main body part, so that the stiffness of the edge part is increased, and the papermaking felt is not easy to be worn down when running on a papermaking machine; and, because the paper machine is the high-speed operation, the position skew phenomenon can appear in the papermaking felt when using repeatedly, and the increase of limit portion thickness can avoid the flange ware to appear the phenomenon of buckling at the papermaking felt of rectifying in-process.
Referring to fig. 5, fig. 5 is a schematic flow chart of an embodiment of a method for manufacturing a papermaking felt according to the present application. In another embodiment, the present application also provides a method of making a papermaking felt. It should be noted that the present embodiment is not limited to the flow sequence shown in fig. 5 if substantially the same result is obtained. As shown in fig. 5, the present embodiment includes:
s410: a scrim layer is provided.
The base fabric layer 10 defines a main body 110 and side portions 130 located at both side edges of the main body 110. For specific structural parameters of the base fabric layer 10, reference is made to the above embodiments, and details are not repeated herein. The base fabric layer 10 includes at least a first base fabric layer 11 and a second base fabric layer 13, and the base fabric layer 10 is formed by laminating the first base fabric layer 11 and the second base fabric layer 13. The setting of two-layer base cloth can increase the powerful of base cloth layer 10, can support surface course fibrous layer 31 better and can prevent that base cloth layer 10 is broken when using to first base cloth layer 11 and second base cloth layer 13 are because can not laminate completely, have the space between the two, make base cloth layer 10 have certain resilience and drainage performance, thereby increased papermaking felt 100's resilience, satisfied the dehydration demand of paper machine to papermaking felt 100.
Further, in an embodiment, the base fabric layer 10 needs to be subjected to oil-heat stretching and setting treatment under a certain tension, and internal stress generated in the stretching process of the base fabric layer 10 is eliminated through heat, so that macromolecules in the base fabric layer 10 are loosened to a certain extent, the shape of fibers in the base fabric layer 10 is fixed and formed, and the change of shape or size of the base fabric layer 10 in subsequent use is avoided.
S420: a fiber layer is formed on the main body portion and the side portions of the base fabric layer.
The fiber layer 30 can be regarded as a fiber net attached to the base fabric layer 10, and can absorb moisture of a paper sheet to dewater the paper sheet, and can modify the surface of the paper sheet to make the surface of the paper sheet flat and smooth. In the present embodiment, the papermaker's felt 100 is configured by laying the fiber layer 30 on the base fabric layer 10, so that the papermaker's felt 100 can filter water and modify the flatness of the paper surface.
Referring to fig. 6, fig. 6 is a schematic view illustrating a process of forming a fiber layer on a main portion and an edge portion of a base fabric layer in a method of manufacturing a papermaking felt according to the present application. It should be noted that the present embodiment is not limited to the flow sequence shown in fig. 6 if substantially the same result is obtained. As shown in fig. 6, the present embodiment includes:
s421: and respectively needling the two sides of the base fabric layer to form a surface layer fiber layer and a bottom layer fiber layer.
In this embodiment, the base fabric layer 10 is attached to a needle loom, and the top layer fiber layer 31 and the bottom layer fiber layer 33 are formed on both sides of the base fabric layer 10 by needle punching flocking, thereby forming the semi-finished papermaking felt 100.
Further, the semi-finished papermaking felt 100 is soaked in a detergent, washed and drained after soaking for a preset time, so that fiber grease is washed away, and the surface of the washed and drained semi-finished papermaking felt 100 is singed to remove surface floating hairs and long hairs, so that the surface flatness of the papermaking felt 100 is improved. The type and concentration of the detergent and the preset time for soaking are not particularly limited and can be specifically set according to actual use requirements. For example, the detergent may be an alkaline detergent having a concentration of 5%, and the preset time for soaking may be 1 hour.
In order to avoid the change of the shape or size of the papermaking felt 100 during the subsequent use, the semi-finished papermaking felt 100 after soaking and singeing needs to be subjected to pressurized oil hot-roll setting, so as to obtain the finished papermaking felt 100.
S422: and needling the edge part of the surface layer fiber layer far away from the base cloth layer to form a reinforced fiber layer.
In this embodiment, a marking tool is used to draw a mark line on the setting machine at a position of a preset width inward from the outer edge of the edge 130 as a reference line for thickening the edge 130, wherein the preset width is not specifically limited and can be specifically set according to actual use requirements, for example, the preset width can be 8 cm; the finished papermaker's felt 100 is loaded into the needle loom again, and a reinforcing fiber layer is formed by needle punching on the side of the face layer fiber layer 31 outside the mark line away from the base fabric layer 11. The needle board is removed from the portion of the needle machine that does not need to be needled to avoid affecting the main body 110 of the papermaker's felt 100. When the edge 130 of the face layer fiber layer 31 on the side away from the base layer 11 is needle-punched with the flocked reinforcing fiber layer, that is, when a fleece is laid on the edge 130, the edge 130 is pulled by hand to form an oblique seam with the main body 110.
Alternatively, in one embodiment, 150g/m flocking may be needle punched at the edge 130 of the side of the facing fibrous layer 31 away from the base layer 112And reinforcing the fiber layer. In other embodiments, other amounts of reinforcing fiber layers may be laid, and may be specifically arranged according to actual use requirements, and are not specifically limited herein.
S423: and carrying out needling treatment on the reinforced fiber layer.
In this embodiment, in order to make the reinforcing fiber layer and the finished product of the papermaking felt 100 more firmly combined, in one embodiment, after the flocking reinforcing fiber layer is needled, the edge portion 130 on which the reinforcing fiber layer is laid is needled one turn, for example, the edge portion 130 may be needled one turn, so that the cohesion between the reinforcing fiber layer and the finished product of the papermaking felt 100 is increased, thereby increasing the thickness of the edge portion 130 and increasing the stiffness of the edge portion 130.
Further, in order to avoid the change of the shape or the size of the edge portion 130 of the papermaking felt 100 during the subsequent use, in one embodiment, the edge portion 130 is flocked and thickened, then is shaped by infrared rays, and after the shaping is finished, the two sides are opened according to the order and the like.
In another embodiment, the present application also provides a papermaking machine apparatus comprising the papermaking felt 100 of any of the above embodiments.
The above description is only for the purpose of illustrating embodiments 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 of the present application or are directly or indirectly applied to other related technical fields, are also included in the scope of the present application.
Claims (10)
1. A papermaking felt characterized in that,
the papermaking felt is defined with a main body part and edge parts positioned on two side edges of the main body part, and comprises base cloth layers and fiber layers which are arranged in a laminated mode;
wherein the thickness of the fiber layer of the side portion is greater than the thickness of the fiber layer of the main body portion.
2. The papermaking felt according to claim 1,
the papermaking felt at least comprises a surface layer fiber layer, a base cloth layer and a bottom layer fiber layer which are sequentially stacked;
the edge part further comprises a reinforcing layer, and the reinforcing layer is arranged on one side, far away from the base cloth layer, of the surface layer fiber layer.
3. The papermaking felt according to claim 2,
the reinforcing layer includes a reinforcing fiber layer.
4. The papermaking felt according to claim 3,
the fiber raw material of the reinforced fiber layer comprises polyamide fiber;
wherein the gram weight of the nylon fiber is 145-155g/m2(ii) a And/or
The fineness of the nylon fiber is 10D-20D.
5. The papermaking felt according to claim 1,
the base cloth layers at least comprise a first base cloth layer and a second base cloth layer, and the first base cloth layer and the second base cloth layer are arranged in a laminated mode;
wherein the weave structure of the first base fabric layer comprises an 1/3 or 1/5 weft repeat; and/or
The weave structure of the second scrim layer comprises an 1/2 twill weave; and/or
The first base cloth layer is formed by weaving first warps and first wefts, the first warps are monofilaments, and the first wefts are plied yarns; and/or
The second base cloth layer is formed by weaving second warps and second wefts, the second warps are monofilaments and/or plied yarns, and the second wefts are plied yarns; and/or
The raw materials of the first warp comprise nylon monofilaments, the raw materials of the first weft and the second weft comprise nylon strands, and the raw materials of the second warp comprise the nylon monofilaments and/or the nylon strands; and/or
The fineness of the nylon monofilament is 500D-950D, and the fineness of the nylon plied yarn is 1400D.
6. The papermaking felt according to claim 1,
the papermaking felt at least comprises a surface layer fiber layer, a base cloth layer and a bottom layer fiber layer which are sequentially stacked, wherein the surface layer fiber layer comprises a surface layer fiber layer and an inner layer fiber layer, and the inner layer fiber layer is arranged between the surface layer fiber layer and the base cloth layer;
the fiber fineness of the inner fiber layer is greater than that of the surface fiber layer, and the fiber fineness of the inner fiber layer is greater than or equal to that of the bottom fiber layer;
preferably, the fiber fineness of the surface fiber layer is 3D-10D, the fiber fineness of the inner fiber layer is 25D-30D, and the fiber fineness of the bottom fiber layer is 20D-30D.
7. A method for manufacturing a papermaking felt is characterized in that,
providing a base cloth layer, wherein the base cloth layer is defined with a main body part and edge parts positioned at two side edges of the main body part;
and forming fiber layers on the main body part and the edge part of the base cloth layer, wherein the thickness of the fiber layer of the edge part is larger than that of the fiber layer of the main body part.
8. The method of producing a papermaking felt according to claim 7, wherein the forming of the fiber layer on the main body portion and the side portion of the base fabric layer includes:
respectively needling the two sides of the base cloth layer to form a surface layer fiber layer and a bottom layer fiber layer;
and needling the edge part of one side of the surface layer fiber layer, which is far away from the base cloth layer, to form a reinforced fiber layer.
9. The method of manufacturing a papermaker's felt according to claim 8,
and carrying out needling treatment on the reinforced fiber layer.
10. A paper machine arrangement, characterized in that the paper machine arrangement comprises a paper making felt according to any one of claims 1-6.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110513121.6A CN113174772A (en) | 2021-05-11 | 2021-05-11 | Papermaking felt, preparation method of papermaking felt and papermaking machine equipment |
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| CN202110513121.6A CN113174772A (en) | 2021-05-11 | 2021-05-11 | Papermaking felt, preparation method of papermaking felt and papermaking machine equipment |
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| CN101233275A (en) * | 2005-08-01 | 2008-07-30 | 市川株式会社 | Papermaking felt |
| CN101100828A (en) * | 2006-04-14 | 2008-01-09 | 沃依特专利有限责任公司 | Fabric edge enhancement |
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