JP4855089B2 - Papermaking felt - Google Patents

Description

The present invention relates to a papermaking felt having a base fabric having a multiple structure in which a plurality of warps overlap in the thickness direction.

  In the felt for papermaking used in the wet paper pressing process, a base fabric having a structure in which warp yarns are arranged in multiple layers may be employed so as to increase the amount of voids in order to ensure high water squeezability. As such a multi-structure base fabric, there are known a laminate structure in which a plurality of fabrics separately woven by a loom are stacked, and a multi-woven structure having a multi-weave structure woven by a loom.

In the base fabric of the multiple woven structure, the structure in which each weft is entangled with all the warp yarns arranged in multiple, especially the double woven structure in which each weft is entangled with both warp yarns arranged in double is the most common. In addition, a triple weave or quadruple weave structure is known (see Patent Document 3). In addition, a laminate-structured base fabric generally has a structure in which two single-woven fabrics are stacked, or a structure in which a single-woven fabric and a double-woven fabric are stacked (see Patent Documents 4 and 5). In addition, various other structures are known (see Patent Documents 6 and 7).
Japanese Patent Publication No. 5-47675 Japanese Patent Laid-Open No. 9-31881 JP 2001-254287 A JP 2000-256984 A Japanese Patent Laid-Open No. 2005-200819 Japanese Patent No. 3615413 Japanese Patent No. 3165839

  However, in the base fabric of the multiple woven structure in which each weft is entangled with all of the above-mentioned multiple warps, there is a disadvantage that the void amount does not increase for the multiple warps arranged, and the compression acting during use. It has the inconvenience of compression resistance that is hard to be crushed against force, and low compression recovery that restores the original state when the compression force is lost, and has a large void volume and excellent compression resistance and compression recovery From the viewpoint of ensuring the above, the laminated structure is more advantageous than the multi-woven structure. However, a laminate-structured base fabric requires the trouble of weaving a plurality of fabrics separately, and is also difficult to manufacture because a plurality of fabrics overlapped in the course of manufacturing tend to be displaced. Further, in a structure in which two single woven fabrics are stacked, an expected void amount may not be obtained depending on the fabric structure.

The present invention has been devised to solve such problems of the prior art, the main purpose of which can ensure a large amount of voids, excellent compression resistance and compression recovery, Another object of the present invention is to provide a papermaking felt configured to be easily manufactured.

In order to solve such a problem, the present invention has a base fabric that is used in a press part of a paper machine and has a multiple structure in which a plurality of warp yarns overlap in the thickness direction. In the felt for papermaking in which a nonwoven fiber layer is laminated and integrated , each of the plurality of warp yarns and a plurality of warp yarns in which the base fabric is entangled with a weft yarn so that the plurality of warp yarns are integrated with each other consists of repeating units tissues comprising a single woven polymer portion in a state in which the weft is superimposed fabric layers of the single woven overlap in the thickness direction of entangled, said fabric layer in single weave polymerization unit each to The entangled form of the wefts that constitute the warp yarns is vertically symmetrical .

  According to this, since the single woven polymer part has a structure in which a single woven fabric layer is overlapped, a large amount of voids can be secured and excellent compression resistance and compression recovery can be obtained simultaneously. Since the weft integrates a plurality of warp yarns and suppresses the shift of the single weave polymerized portion, the manufacture becomes easy.

  In this case, the multiple weaving portion has a single weft structure in which each weft is entangled with both warps in a warp double structure in which two warps are overlapped in the thickness direction. In the warp multiplex structure in which warps are overlapped in the thickness direction, in addition to a single weft structure in which each weft is entangled with all the multiple warps overlapping in the thickness direction, a part of the multiple warps A weft multiple structure in which wefts to be entangled are provided in the thickness direction is also possible.

  As described above, according to the present invention, a large amount of voids can be ensured, excellent in compression resistance and compression recovery, and easy to manufacture. Therefore, it is required in a press part (squeezing part) of a paper machine. A great effect can be obtained in producing a felt having high water squeezability at low cost. By changing the ratio of the multiple weaving part and the single weaving polymerization part, the amount of voids can be adjusted freely, and fabrics that meet the required conditions can be easily manufactured according to the part of the paper machine to be applied. It becomes possible.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  1 to 5 are cross-sectional views in the length direction showing an example of a felt base fabric according to the present invention. In the base fabric 1, a nonwoven fiber layer 2 is laminated and integrated to form a papermaking felt, and the first warp 3 on the papermaking surface 5 side and the second warp 4 on the running surface 6 side are in the thickness direction. It has a double warp structure. In the base fabric 1, the first and second warps 3 and 4 are woven as driven yarns on the loom, and the wefts become warps (warp warps) on the loom.

  In the example shown in FIG. 1, the base fabric 1 includes a multi-woven portion in which wefts 11 are entangled with both warps 3 and 4 so that the two warps 3 and 4 are integrated with each other, and two warps 3 The weft yarns 12 and 13 entangled with each of the four layers are composed of repeating unit structures composed of a single weaving polymerized portion that overlaps in the thickness direction and has two layers of single weaving fabric layers, A multi-weaving portion and a single weaving polymerization portion are each formed in the length direction by one weft.

  In the example shown in FIG. 2, the base fabric 21 has a multi-woven portion in which wefts 22 are entangled with two warps 3 and 4, and wefts 23 and 24 entangled with each of the two warps 3 and 4. And the weft yarns 25 and 26 are each composed of a unit structure composed of a single weaving overlapped portion overlapping in the thickness direction, the multiple weaving portion is one weft in the length direction, and the single weaving overlapped portion is the weft yarn 2 in the length direction. This is formed.

  In the example shown in FIG. 3, the base fabric 31 is a multiple woven portion in which weft yarns 32 and 33 are entangled with two warp yarns 3 and 4, and a weft yarn that is entangled with each of the two warp yarns 3 and 4. 34 and 35 are composed of repeating unit structures composed of single weave polymerized portions overlapping in the thickness direction, with multiple weaves forming two wefts in the length direction and single weaving polymerized portions forming one weft in the length direction. Has been.

  In the example shown in FIG. 4, the base fabric 41 has a multiple weaving portion in which weft yarns 42 and 43 are intertwined with two warp yarns 3 and 4 and a weft yarn intertwined with each of the two warp yarns 3 and 4. 44 and 45 and wefts 46 and 47 are each composed of a unit structure consisting of a single weaving overlapped portion overlapping in the thickness direction. Multiple weaving portions are two wefts in the length direction and a single weaving overlapped portion is the length direction. Are formed for two wefts.

  In the example shown in FIG. 5, the base fabric 51 includes a multi-woven portion in which wefts 52 are entangled with two warps 3 and 4, and wefts 53 and 54 entangled with each of the two warps 3 and 4. , The weft yarns 55 and 56, the weft yarns 57 and 58, and the weft yarns 59 and 60 are each composed of a unit structure consisting of a single weaving overlapped portion overlapping in the thickness direction, and the multiple weaving portion is equivalent to one weft in the length direction. In addition, a single weaving polymerization portion is formed in the length direction by four wefts.

  In the base fabrics 1, 21, 31, 41, and 51 configured as described above, the single-woven polymerized portion has a structure in which the single-woven fabric layers are overlapped with each other. Excellent compression resistance and compression recovery properties can be obtained, and at the same time, the wefts integrate the two warp yarns 3 and 4 in the multiple weaving portion, so that the shift of the single weaving polymerized portion can be suppressed.

  In addition, the arrangement form of the multiple woven portion and the single woven superposed portion, that is, how many wefts are formed in the length direction, respectively, is not limited to the examples of FIGS. Various other forms are possible. Here, when the proportion of the single weaving polymer part is increased, it is possible to ensure a large amount of voids in the base fabric and to improve the compression resistance and the compression recovery property. The effect of suppressing misalignment is improved, and it may be set as appropriate according to conditions required for the base fabric, such as a part of a paper machine to be applied.

  6-8 is typical sectional drawing of the width direction of the base fabric shown in FIG. These show examples of the entanglement form for the warp of the weft in the multiple woven part and the single woven superposition part according to the present invention, in addition to the example of FIG. It can be combined with various arrangements of multiple woven parts and single woven polymer parts.

  In the example shown in FIG. 6A, the weft 11 constituting the multiple weaving portion, that is, entangled with both the two warp yarns 3 and 4 overlapping in the thickness direction, is located above the first warp yarn 3 (the papermaking surface 5). Side) through the first and second warp yarns 3 and 4 and then to the lower side of the second warp yarn 4 (running surface 6 side), and between the first and second warp yarns 3 and 4 And is woven so as to reach the upper position of the first warp 3.

  On the other hand, the weft yarns 12 and 13 constituting the single-weave superposed portion, that is, entangled with each of the two warp yarns 3 and 4 overlapping in the thickness direction, are woven in a plain weave. The weft yarns 12 and 13 are vertically entangled with the warp yarns 3 and 4, and the weft yarn 13 passes the lower side of the second warp yarn 4 at the position where the weft yarn 12 passes the upper side of the first warp yarn 3. The weft yarn 13 passes the lower side of the first warp yarn 3 and the weft yarn 13 passes the upper side of the second warp yarn 4.

  In the example shown in FIG. 6 (B), the weft yarns 12 and 13 constituting the single weave superposed portion are woven in a plain weave as in the above example, but here, the weft yarns 12 and 13 with respect to the warp yarns 3 and 4 The entangled form is vertically asymmetric, the weft 12 passes above the first warp 3, the weft 13 passes above the second warp 4, and the weft 12 is below the first warp 3 The weft 13 passes below the second warp 4 at a position passing through.

  In the example shown in FIG. 7 (A), the upper weft 12 constituting the single weave superposed portion passes through the lower side of the three warp yarns 3 and then passes through the upper side of the one warp yarn 3 in a 3/1 structure. It is woven. On the other hand, the lower weft 13 constituting the single-weaving polymerized portion passes through the lower side of one warp 4 and then is woven in a 1/3 structure passing through the upper side of the three warps 4. The entanglement form of the wefts 12 and 13 with respect to the warps 3 and 4 is vertically symmetric.

  In the example shown in FIG. 7 (B), the upper and lower weft yarns 12 and 13 constituting the single weave superposed portion are woven in a 3/1 structure and a 1/3 structure, respectively, as in the above example. The upper and lower wefts 12 and 13 are woven in a manner shifted in the width direction by two warp yarns 3 and 4, and the entangled form with respect to the warp yarns 3 and 4 is asymmetric in the vertical direction.

  In the example shown in FIG. 7 (C), the upper and lower weft yarns 12 and 13 constituting the single weave superposed portion are woven in a 1/3 structure and a 3/1 structure, respectively, contrary to the above example. -The entanglement form for 4 is vertically symmetrical.

  In the example shown in FIG. 7D, the upper and lower weft yarns 12 and 13 constituting the single-weave superposed portion are woven in a 1/3 structure and a 3/1 structure, respectively, as in the above example. The upper and lower wefts 12 and 13 are woven in a manner shifted in the width direction by two warp yarns 3 and 4, and the entangled form with respect to the warp yarns 3 and 4 is asymmetric in the vertical direction.

  In the example shown in FIG. 8 (A), the upper weft 12 constituting the single-weave superposed portion passes through the lower side of the seven warp yarns 3 and then has a 7/1 structure passing through the upper side of the one warp yarn 3. It is woven. On the other hand, the lower weft 13 constituting the single-weave superposed portion passes through the lower side of one warp 4 and is then woven in a 1/7 structure passing through the upper side of the seven warps 4. Further, the upper and lower weft yarns 12 and 13 are woven in a manner shifted in the width direction by two warp yarns 3 and 4.

  In the example shown in FIG. 8 (B), the upper and lower weft yarns 12 and 13 constituting the single weave superposed portion are woven in a 7/1 structure and a 1/7 structure, respectively, as in the above example. The upper and lower weft yarns 12 and 13 are woven in a manner shifted in the width direction by four warp yarns 3 and 4.

  In addition, the entanglement form with respect to the warps 3 and 4 of the wefts 11 constituting the multiple weaving portion is not limited to the examples shown in FIGS. 6 to 8, and various other forms are possible. . For example, from the position above the first warp 3, it passes between the first and second warps 3, 4, passes between the adjacent warps 3, 4, and then comes out to the lower side of the second warp 4. It is also possible to weave it.

  Moreover, the entanglement form with respect to the warp yarns 3 and 4 of the weft yarns 12 and 13 constituting the single-weave polymerized portion is not limited to the examples shown in FIGS. 6 to 8, and various other forms are also possible. Is possible. For example, in the case of the weft 12, a 2/2 structure passing through the lower side of the two warp yarns 3 and then passing through the upper side of the two warp yarns 3 is also possible. It is also possible to have different structures for the upper and lower wefts 12 and 13.

  FIG. 9 is a sectional view in the length direction showing another example of the felt base fabric according to the present invention. This felt is formed by laminating and integrating the nonwoven fiber layer 2 on a base fabric 71. The base fabric 71 has three first, second, and third warps 72, 73, and 74 in the thickness direction. It has a triple structure of warp.

  The base fabric 71 includes a multiple weaving portion in which wefts 81 are intertwined with all three warp yarns 72, 73, and 74, and three warp yarns 72 so that the three warp yarns 72, 73, and 74 are integrated with each other. · Consists of repeating unit structures composed of single-weave polymerized portions in which weft yarns 82, 83, and 84 intertwined with each of 73 and 74 overlap each other in the thickness direction so that three layers of single-woven fabric layers overlap each other Has been.

  10 is a schematic cross-sectional view in the width direction of the base fabric shown in FIG. The weft 81 constituting the multi-weaving portion passes from the position above the first warp 72 through the first and second warps 72 and 73, and between the second and third warps 73 and 74, to the third Slips out below the warp 74 and passes between the second and third warps 73 and 74 and between the first and second warps 72 and 73 to reach the position above the first warp 72. Is woven into.

  On the other hand, the weft yarns 82, 83, and 84 constituting the single weave superposed portion are woven in a plain weave with respect to each of the three warp yarns 72, 73, and 74. The entangled form of the weft yarns 82, 83, and 84 constituting the single weave superposed portion with respect to the warp yarns 72, 73, and 74 can be various forms including the examples shown in FIGS. is there.

  FIG. 11 is a sectional view in the length direction showing another example of the felt base fabric according to the present invention. The base fabric 91 has a warp triple structure in which the first, second, and third three warps 72, 73, and 74 are stacked in the thickness direction, as in the example of FIG. However, here, in the multiple weaving portion, the weft 92 is intertwined with the upper two warps 72 and 73, and the weft 93 is intertwined with the lower two warps 73 and 74, and the two wefts Nos. 92 and 93 have a weft double structure provided to overlap in the thickness direction.

  12 is a schematic cross-sectional view in the width direction of the base fabric shown in FIG. The upper weft 92 constituting the multi-weaving portion passes from the upper position of the first warp 72 through the first and second warps 72 and 73, and is positioned between the second and third warps 73 and 74. And is further woven so as to pass through between the first and second warps 72 and 73 and reach the upper position of the first warp 72. Further, the lower weft 93 constituting the multi-weaving portion passes between the second and third warps 73 and 74 from the position between the first and second warps 72 and 73, and the third warp 74. It is woven so as to come out to the lower side and further pass through between the second and third warp yarns 73 and 74 to reach the position between the first and second warp yarns 72 and 73.

  On the other hand, the weft yarns 94, 95, and 96 constituting the single weave superposed portion are woven in a plain weave with respect to each of the three warp yarns 72, 73, and 74 as in the example of FIG. It is in the state which piled up three textile layers. The entangled form of the wefts 94, 95, and 96 constituting the single weave superposed portion with respect to the warps 72, 73, and 74 can be various forms including the examples shown in FIGS. is there.

  FIG. 13 is a cross-sectional view schematically showing the overall shape of the felt shown in FIG. FIG. 13A shows an example of an endless felt, and FIG. 13B shows an example of an open end felt (felt with a seam).

  In the example shown in FIG. 13B, joining loops 101 and 102 are formed by folding back warps 3 and 4 at the ends of the felts with ends, and a common hole formed by engaging the joining loops 101 and 102 is formed. The core wire 103 is inserted and the end portions of the felt are joined to each other. In this way, when the felt is put into the paper machine, it is only necessary to draw the end felt into the felt run and join both ends thereof to endlessness, thereby improving the putting workability. it can.

  In particular, in this configuration, when the weft yarns 12a and 13a constituting the multi-woven portion are arranged in the immediate vicinity of the joining loops 101 and 102, tightening of the base portions of the joining loops 101 and 102 is relaxed, and the shape of the joining loops 101 and 102 is optimized. can do. Further, when the weft yarns 12a and 13a are made of an aggregate yarn material in which one or both of staples and filaments are aggregated, the nonwoven fiber layer 2 can be firmly held, and seam marks can be suppressed. it can.

  As mentioned above, although the example of the fabric from which the warp which overlaps in the thickness direction becomes two or three was shown, this invention is not limited to these examples, The warp which overlaps in the thickness direction becomes four or more The same applies to woven fabrics.

  In FIG. 6, FIG. 7, FIG. 8, FIG. 10, and FIG. 12, in order to describe the entanglement state of the weft yarns in an easy-to-understand manner, Although shown, the actual thickness of the weft is not different.

The felt for papermaking according to the present invention can ensure a large amount of voids, has an effect of being excellent in compression resistance and compression recovery, and easy to manufacture, and is a press part (squeezing part) of a paper machine. it is useful as a etc. press a Fell door used.

Sectional drawing of length direction which shows an example of the base fabric for felt by this invention Sectional view in length direction showing another example of the felt fabric according to the present invention Sectional view in length direction showing another example of the felt fabric according to the present invention Sectional view in length direction showing another example of the felt fabric according to the present invention Sectional view in length direction showing another example of the felt fabric according to the present invention Typical sectional drawing of the width direction which shows an example of the base fabric shown in FIG. Typical sectional drawing of the width direction which shows another example of the base fabric shown in FIG. Typical sectional drawing of the width direction which shows another example of the base fabric shown in FIG. Sectional view in length direction showing another example of the felt fabric according to the present invention Typical sectional drawing of the width direction of the base fabric shown in FIG. Sectional view in length direction showing another example of the felt fabric according to the present invention Typical sectional drawing of the width direction of the base fabric shown in FIG. Sectional view schematically adding the overall shape of the felt shown in FIG.

Explanation of symbols

1.21.31.41.51.71.91 Base fabric 2 Non-woven fiber layer 3. 4.72-74 Warp 11-13.22-26.32-35.42-47.52-60.81 84.92-96 Weft

Claims (1)

It is a papermaking felt that is used in the press part of a paper machine and has a base fabric with a multiple structure in which multiple warps overlap in the thickness direction, and a nonwoven fiber layer is laminated and integrated on both sides of this base fabric. And
The base fabric is a single weave in which a multi-woven portion in which wefts are entangled so that the plurality of warps are integrated with each other, and a weft entangled with each of the plurality of warps overlaps in the thickness direction. It is composed of repeating unit structures composed of a single weave polymerized portion in which the fabric layers are superposed, and the wefts of the wefts constituting the fabric layer in the single weave polymerized portion are symmetrical with respect to the warp felt for papermaking, characterized in that it is made with.

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