JPS6352159B2 - - Google Patents

Description

[Detailed Description of the Invention] (a) Field of Industrial Application The present invention relates to a method for manufacturing a dryer felt for paper making, and more particularly, to a method for producing a dryer felt for paper making, and more specifically, a method for manufacturing a dryer felt for paper making, and more specifically, a method for manufacturing a dryer felt for paper making, and more specifically, a method for producing a dryer felt for paper making, and more specifically, a method for producing a dryer felt for paper making, and more specifically, a method for producing a dryer felt for paper making, and more specifically, a method for manufacturing a dryer felt for paper making, and more specifically, a method for manufacturing a dryer felt for paper making, and more specifically, a method for producing a dryer felt for paper making, and more specifically, a method for manufacturing a dryer felt for paper making, and more specifically, a method for manufacturing a dryer felt for paper making, and more specifically, a method for manufacturing a dryer felt for paper making, and more specifically, a method for manufacturing a dryer felt for paper making, and more specifically, a method for manufacturing a dryer felt for paper making, and more specifically, a method for producing a dryer felt for paper making. The present invention relates to a method of manufacturing a dryer felt for paper making.

(B) Prior Art Dryer felts for paper making are usually manufactured in an end-shaped form, and are joined into an endless form when suspended in a paper machine.
Therefore, on both ends of the dryer felt for paper making, for example,
As seen in Japanese Patent No. 58-48800, a joining hook is provided, and a piece of felt is further provided to cover the joint.

(c) Problems to be Solved by the Invention However, in order to make hooks or loops to make the conventional dryer felt endless, it is usual to needle-punch a fiber web on one or both sides of the base fabric to connect both sides. After it is integrated, it is cut to a predetermined length, and then the felt layers at both ends are peeled off from the base fabric, and metal hooks are planted on both ends of the base fabric, or warp threads for loops are sewn into the fabric of the base fabric. The process of attaching the felt layer that has been peeled off after the welding process is attached to the base fabric using adhesive or sewing is required, which increases the cost. There will be a difference. This difference in performance is due to the fact that the joining loops are formed by the warp threads of the base fabric, and the loops formed at both ends are interlocked, as described in Japanese Utility Model Application Publication No. 56-119499.
A core wire is inserted into the common hole, the base fabric is joined in an endless manner, a fiber web is laminated on one or both sides of the joined part together with the endless base fabric body, and the fiber web is integrated by needle punching, and then the core wire is pulled out. This can be solved by separating the joints, but in such a method,
With the joining loops at both ends engaged and the core wire inserted, the joint is needle-punched several times, so the joining loops are easily damaged by the needle, leading to a decrease in the strength of the joint. This inconvenience arises.

(d) Means for Solving the Problems The present invention has a needle punching density of the base fabric that is lower than that of the felt layer, and the bonding loops formed in advance at both ends of the base fabric are only slightly damaged by needling. To provide a method for efficiently manufacturing a papermaking dryer felt having a felt layer for covering a predetermined paper-making dryer felt having joining loops formed by folding and binding warp yarns at both ends. On at least one side of a long base fabric, a needle-felt mat longer than the base fabric, which is formed by layering a fiber web on a thin auxiliary sheet and performing needle punching, is placed with its starting end in front of the base fabric. While extending and overlapping, the base fabric and the needle felt mat are temporarily fixed at the starting end of the base fabric, and then needle punching is performed sequentially from the starting end of the needle felt mat to separate the base fabric and the needle felt mat. A single layer portion of the needle felt is formed by integrating the needle felt with the mat and extending forward and backward from the front and rear ends of the base fabric, and then the needle felt base is processed with resin, and then the single layer portion is formed. A felt layer was formed by arbitrarily cutting the base fabric to cover the joint formed by the interlocking of the loops at both ends of the base fabric and the insertion of the core wire, thereby producing a dryer felt for a paper machine having a covering felt for the joint. It is something.

(e) Example An example of the present invention will be explained below based on the drawings schematically showing a double weave base fabric 3 using synthetic resin monofilaments for the warp 1 and the weft. Terminal weft 2 of base fabric 3 among warp groups
By extending the warp threads 1A passing through the inside of the base fabric 3 and inserting them into the structure of the base fabric 3, a base fabric 3 of a predetermined length with joining loops 4, 4 formed at both ends of the base fabric 3 is made. On the other hand, a fiber web 6 is layered on a thin auxiliary sheet 5 such as a woven fabric of slit yarn of polyethylene film, and needle punching is performed to form a needle felt mat 7 that is longer than the base fabric 3, as shown in FIG. The starting end of the needle felt mat 7 is joined to the guide sheet 8 to the needle machine as shown in FIG. Next, the base fabric 3
The needle felt mat 7 is placed on top of the base fabric 3 with its starting end 7A extending in front of the starting end of the base fabric 3.
and the needle felt mat 7 are temporarily fastened 9 with arbitrary threads at the starting end of the base fabric 3, and then the guiding sheet 8 is advanced to the winding section so that the starting end 7' of the needle felt mat 7 becomes a needle. located below the needle group 10 of the machine, and then the starting end 7' of this needle felt pin 7.
The base fabric 3 and the needle felt mat 7 are wound up while being integrated with each other by sequentially applying needle punching. Then, if necessary, needle punching is performed again while unwinding from the terminal end. In this way, as schematically illustrated in FIG. 3, a felt layer 7A bonded onto the base fabric 3 and a single layer of needle felt extending forward and rearward from the front and rear ends of the base fabric 3, respectively. A needle felt base body 11 is provided with portions 7A and 7B. Thereafter, the substrate is impregnated with a resin liquid by a conventional method and dried to prevent the fibers from falling off, and one single layer portion 7A of the needle felt is placed at a position slightly distant from the end of the base fabric 3, as shown by the broken line. By cutting the other single layer part 7B diagonally on the edge of the base fabric 3, a dryer felt with covering felt at the joint part is obtained.

The dryer felt for papermaking thus obtained has an extended felt layer 7C of the same quality as the felt layer 7 on the base fabric at one end (the end on the side in the direction of papermaking), and both ends of the base fabric are attached as shown in FIG. loop 4,
Insert the core wire (not shown) into the common hole created by meshing 4.
When inserted into an endless shape, the upper surface of the joint portion 12 is covered with the extended felt layer 7C.

(f) Effects of the Invention As described above, the present invention provides a base fabric having a length longer than the base fabric on at least one side of a base fabric having a predetermined length and having joining loops formed by folding and binding the warp threads at both ends. The needle felt mats are overlapped with their starting ends extending in front of the starting ends of the base fabric, and the base fabric and the needle felt mat are temporarily fastened at the starting ends of the base fabrics, and the starting ends of the needle felt mats are overlapped. In other words, by performing needle punching from a position forward of the joining loop at the starting end of the base fabric and integrating the base fabric with the needle felt mat, the front and rear ends of the base fabric are Form a single-layer part of the needle felt that extends on each side, and then apply resin processing to the needle felt base, and then cut the single-layer part arbitrarily to fit the loops at both ends of the base fabric and insert the core wire. A felt layer is formed to cover the joint formed by this method, and a dryer felt for paper making is provided with a felt layer covering the joint. Therefore, after making the needle felt body as in the conventional method, a hook for joining is formed. The troublesome work of planting and forming loops is no longer necessary. Moreover, since the core wire is not inserted through the joining loops formed in advance at both ends of the base fabric, each loop has a degree of freedom to swing back and forth and left and right, and damage to the loops during needle punching is avoided. Therefore, even though needle punching is performed from above the joining loop, there is almost no decrease in the strength of the loop, and the worry of the loop breaking during use is eliminated. Furthermore, the felt layer that covers the joints is of the same quality as the felt layer of the main body, so there will be no dry spots or seam marks due to the presence of the joints, and since it is treated with resin, the surface and edges of the felt layer will not be affected. This prevents the fibers from fraying, resulting in a high-quality dryer felt that can withstand long-term use.

[Brief explanation of the drawing]

The drawings show an embodiment of the present invention, in which Fig. 1 is a partially cutaway side view showing the base fabric and needle felt mat, Fig. 2 is a simplified explanatory diagram of the needle punching process, and Fig. 3 4 is a simplified side view of the needle felt base, and FIG. 4 is a side view showing the joint. 1 is a base fabric, 2 is a warp, 3 is a weft, 4 is a joining loop, 5 is an auxiliary sheet, 6 is a fiber web, 7 is a needle felt mat, 7A and 7B are single layer parts of felt, and 7C is an extended felt layer. , 12 is a joint.

Claims (1)

[Claims] 1 The above-mentioned fabric is formed by layering a fiber web on a thin auxiliary sheet and needle punching it on at least one side of a base fabric of a predetermined length that has joining loops formed by folding and binding the warp threads at both ends. Needle felt mats longer than the base fabric are overlapped with their starting ends extending in front of the base fabric starting ends, and the base fabric and the needle felt mats are temporarily fastened at the starting ends of the base fabrics, Next, needle punching is performed sequentially from the starting end of the needle felt mat to integrate the base fabric and the needle felt mat, and to form needle felt units extending forward and backward from the front and rear ends of the base fabric. After forming a layered portion and then applying resin processing to this needle felt base, the single layered portion is arbitrarily cut to form a joint formed by engaging the loops at both ends of the base fabric and inserting the core wire. A method for producing a dryer felt for papermaking, comprising a covering felt at a joint, the method comprising forming a covering extended felt layer.