JPS5831425B2 - Manufacturing method for nonwoven fabric with diagonal exchange of threads - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method in which the ends of a large number of running fibrous materials arranged at an oblique angle and arranged in one diagonal direction on the right and left ears at regular intervals are fixed, and the obliquely parallel fibrous materials This invention relates to a method for producing a diagonal nonwoven fabric body made of a fiber material in which the arrangement of diagonal parallel yarns is fixed by laminating and attaching another fiber material that intersects with the fiber material.

In this application, fibrous materials include organic materials such as untwisted or heated filament yarns, glued conjugated filament yarns, monofilaments, film yarns, spun yarns, plied twisted yarns, and corded yarns, and inorganic materials such as glass yarns, glass rovings, strands, and fine metal wires. Isoelectricity 1
An independent linear body is included in the level position.

However, webs with a network structure cannot be used as horizontal and diagonal parallel fiber materials, but can be used as warp webs to fix the arrangement of diagonal parallel fiber materials.

Conventional woven fabrics are orthogonal complexes of warp and warp yarns that are woven using a loom.
Patent No. 956336 developed in advance by the applicant, etc.
The product according to No. 38783 (Special Publication No. 53-38783) ``Method for manufacturing a weft/warp laminated fabric of a floor cloth web'' is a weft/warp orthogonal nonwoven fabric made from fiber material, and all of them are weak in the diagonal direction and cannot be equipped in the event of tearing. The fact that it was easy to spread could not be avoided.

On the other hand, products with a bias structure such as automobile tire structures have the advantage that the diagonal direction is strong and there is no risk of key tear propagation. However, since hand lay-up is a time-consuming process, we managed to develop a continuous manufacturing method for bias structure, that is, diagonal nonwoven fabric made of individual fiber materials, which can be used for tents, flexible container packaging materials, fiber-reinforced plastics (FRP), etc. It was also strongly desired by the composite materials industry.

Thereafter, the present applicant et al. inserted the left and right ears of the membrane fiber material between the two left and right pulleys that rotate in opposite directions in one plane, and sandwiched them between the pulleys and the circulating belt, so that the end of the pulleys spread out. Special Publication No. 57-3036 extending laterally along the track
No. 8 "Transverse stretching device for membranes and fiber materials" was developed, and this device was used to produce horizontally parallel bodies of sprayed filaments according to Japanese Patent Application No. 53107037 "Method for producing horizontally parallel bodies of sprayed filaments by centrifugal spinning method" and transversely on films. - Using a transverse membrane body with multiple character-shaped cuts as a raw material, we succeeded in producing a weft web in which monofilament or film yarns with high strength in the transverse direction are attached at regular intervals to the left and right ears by heating and transversely stretching. , by simply layering this with a warp web obtained by a conventional method, instead of using the conventional method of obtaining a warp orthogonal nonwoven fabric using a warp and warp laminating machine using a warp web as a raw material (for example, the method of the above-mentioned patent No. 956336), An invention has been made in which a warp-warp orthogonal fabric can be obtained at an extremely low cost without a warp-warp laminating machine by simply overlapping the above-mentioned weft web obtained by transverse stretching with a warp web obtained by a conventional method.

If we use a product (Fig. 1) in which the weft web does not have a net-like structure, but in which individual monofilaments or film yarns are lined up horizontally and their ends attached to the left and right ear parts, and the left and right ear parts are shifted back and forth, it will be extremely It has been found that the diagonally parallel fiber layers between the left and right parallel ears can be easily changed, and the present invention provides a method for shifting the left and right parallel ears back and forth.

A parallel fiber material of the same or different kind parallel to the selvedges or a reticulated warp web is laminated as another fiber material layer to intersect with the obliquely parallel fiber material obtained, and furthermore, on this, the parallel fiber material obtained in the above manner is laminated. If the single-layer diagonal nonwoven fabric is laminated in such a way that the parallel fiber materials are reversely diagonal, a prostitute nonwoven fabric (Figure 3) that is strong in the symmetrical diagonal direction and longitudinal direction (3 directions: Figure 4) can be obtained. If a weft fiber web is further laminated at the same time or later, a nonwoven fabric body that is strong and dimensionally stable in four directions (FIG. 5), symmetrical and obliquely vertical and horizontal, can be obtained.

It is also possible to easily form such a diagonal nonwoven fabric into a composite with an organic/inorganic matrix.

However, the monofilament with both ends fixed to the ears obtained by the centrifugal spinning method and the transverse stretching method described above has a circular or elliptical cross section, and it is also possible to form a large number of horizontally letter-shaped monofilaments with the ears of the film remaining. The cross section of the film yarn obtained by transverse stretching of the cut membrane body is a flat rectangle.

However, the fiber material of the diagonal nonwoven fabric of the present application is not limited to the range of the above-mentioned horizontally drawn yarns.

Spun filament yarns, twisted yarns such as these, inorganic glass yarns, glass rovings, and sizing yarns such as these are manufactured and processed in single yarn units, and fine metal wires are also manufactured with circular cross sections or It is flat and made with one level.

When using 2nd grade 1st level yarn as a fiber material, one method is as described in Patent No. 835956 (% Kosho 51) of the present applicant.
-c+o67) The intermediate material (FIG. 1) of step (1) of the present invention can be made by the method of continuously fixing the arrangement of r yarns.

That is, a "flat glue surface with parallel yarns in the warp and jet-attached filaments of hot-melt wood in the weft" was prepared, and this was placed on a circulating lattice conveyor as a weft web of a laminating machine by the method of Patent No. 956336 mentioned above. For long cutting, a multi-filament belt that circulates in parallel in the warp direction above intermittently drops suddenly and lifts the cut weft on the lattice, forming a continuous body in the weft to warp (length) direction on the belt surface. , only the lifting belts at the front and rear ends of the cutting weft are coated with hot-melt glue, and only these belts do not circulate, making them one-way photographic material belts in the length direction, and the other intermediate circulating belts If you use water, polyethylene oxide water, or other adhesive, you can peel the parallel bodies of cut wefts from the secondary intermediate belt and dry them without any trouble in post-processing, and you can make the wefts (which are substantially perpendicular to the photographic material).
Horizontal parallel layers (first
Figure) Can be hatched.

The various fiber materials mentioned above can be used in the present application even if they are collapsed, but in this application, the method of collapsing may be used, but first, horizontally parallel fiber layers with the ends fixed on the left and right ear materials parallel to each other in the length direction are used. In the first step, the material is made as a material and then transformed into diagonally parallel fiber layers to produce a diagonal nonwoven fabric body.

Unlike a split fiber web, the diagonally parallel fiber layer produced by the method of the present application has parallel units that are not connected individually, and even if they are connected by other glue fibers or impregnated fibers, this will cause a decrease in the strength of the diagonally parallel fiber material. The strength of the fiber material is exactly the same when it is a horizontally parallel fiber material and when it is a diagonally parallel fiber material.
The only difference is that the connection part with the ear part is slanted.

The present application will be explained below with reference to figures.

FIG. 1 is an intermediate material of the present application.

The left and right ear materials 1゜2 are mutually parallel to ), keeping a constant distance l,
A large number of fiber materials 3, 3' having a length l are fixed in parallel at a constant pitch in many cases in a substantially perpendicular transverse direction with the ends fixed on this photographic material.

In Figure 2, the right ear piece 2 is lower than the left ear piece 1 on the paper.
The parallel fiber materials 3 and 3' are shifted by 3o length and intersect with the photographic material 1°2 at an oblique angle θ, so that the width between the photographic materials 1 and 2 becomes lSinθ, and the other material is fed parallel to the photographic material. glued fiber material 4, 4'
has shown the structural concept of a diagonal nonwoven fabric in which the array of diagonal parallel fiber materials is fixed by being attached at an appropriate pitch.

Of course, 4 and 4' do not need to be multifilament parallel fiber materials, and the reticular widened web obtained from the stretched membrane is also thin and flexible;
Shihashi is used because of its low cost.

In each drawing, the glue filaments attached to prevent the arrangement of the horizontally parallel fibers between the left and right ear materials after being transformed into the diagonally parallel fiber layer by the guidance of the photo material have a transitional mission. However, in order to make it easier to understand the structure of the product of this application, fibers and fibers that are related to strength are included in the product structure diagram.
Only the parallel state of the threads was recorded.

Figure 3 shows the structure of a product in which another diagonal nonwoven fabric is placed on top of the diagonal nonwoven fabric in Figure 2 with the glued fiber side placed in the middle of the two layers and fixed by heat bonding. Ta.

By arranging diagonally parallel fiber layers in reverse diagonals, the glue fibers melt and spread on the fiber material when heated, and it is possible to create a product with high strength only in two diagonal directions, but as shown in Figure 4, it is possible to create a product with high strength only in two diagonal directions. If a fiber material with high strength is used in the symmetrical diagonal direction and longitudinal direction, that is, a product with high strength and dimensional stability in three directions can be obtained.

Furthermore, when feeding a warp web parallel to the photographic material,
If the longitudinal direction of the weft webs 5, 5' obtained by the horizontal stretching device etc. of No. 0368 (Douging) or the weft parallel fiber material layer of Patent No. 956336, which replaces this, is fed parallel to the photographic material, 5
As shown in the figure, a product that is strong in the symmetric diagonal direction, the vertical and horizontal directions, that is, four directions can be obtained.

The strength in each direction can be determined by changing the fiber basis weight in each direction.

FIG. 6 is a plan view (partially showing the side surface with dotted lines) showing one embodiment of the continuous manufacturing process of the diagonal nonwoven fabric of the present invention.

In the figure, a horizontally parallel layer 13 of a large number of fiber materials each having a length l whose ends are fixed to photographic materials 11 and 12 parallel to the traveling direction is passed through a nip roller 14° 14'(14' is the lower side). hand,
A cross guider 16°16' installed in front of the next nip roller 15.
, the width between the materials is the width when the parallel fibers are tilted by an angle θ with the materials, dSlnθ, and in the process, one (left) material goes straight and crosses. Guider 16
It leads to nip rollers 15 and 15' through
As shown by the dotted line when viewed from the side, the material shown on the right has its edges caught in the grooved roller 17 installed at the bottom (or top) of the floor plan passage, and is prevented from falling out of the groove by the presser roller 18. The cross guider 16 passes through a path 19 forming two sides of a triangle connecting the presser, nip, rollers 14 and 14', the grooved roller 17, and the cross guider 16'.
The photographic material passing through the path 19 is guided to the nip rollers 15, 15' through the path 19, and the distance between them is made longer by ICO3θ than the straight line distance from the nip rollers 14, 14' to the nip roller 15°15'. is delayed by 1,6 cosθ with respect to the other photographic material, and the horizontal fiber material becomes parallel to the photographic material at an angle θ diagonal to the nip roller 15,1.
5', the upper roller 20 is internally heated, the lower roller 20' is a cold rubber roller, the nip roller 20. The glue of the hot-melt glued yarns 22, 22' supplied at a predetermined pitch through the nip rollers 20, 20' is melted while being fed at a predetermined pitch to the diagonally parallel fiber material 22, 22 between the nip rollers 20, 20'. ' are adhered and solidified, and the diagonal nonwoven fabric body 23 is constructed and taken back.

Although the product is not shown, it is wound as a long flat roll around a straight pipe core.

When the vertical fiber material is a reticulated web, a cross guider may be used at the selvedge portion to laminate the diagonally parallel fiber layer.

Another fibrous material layer attached to intersect with the diagonally parallel fiber material used to fix the arrangement of the diagonally parallel fiber material to form a diagonal nonwoven fabric may include a parallel warp fiber material layer, a reticulated warp web, etc. However, it is also possible to use a single diagonally parallel fiber material layer obtained in the same manner as the above diagonally parallel fiber material layer and to laminate the respective diagonally parallel fiber materials in a reverse diagonal manner. can.

However, in some cases, the fiber material with a fixed arrangement of diagonal parallel fiber materials is used not as a strength member, but mainly as a material for fixing the transient thread arrangement of forced thread processing and as a reinforcing material for winding tension, similar to the thin weft of the blind weave of a tire cord. Sometimes used.

Therefore, the rigid yarn arrangement 11 fixing material should be 5 to 15 g/
rrl' thin threads or polyethylene reticular widened webs are often attached after hot-melt gluing.

Example 1 High density polyethylene (HDPE) thickness 0.098mm,
While folding the left and right ears of the two-fold tubular membrane of 360rnrIL,
7n7IL width left, a split membrane body with horizontal and parallel cuts made with a front and back pitch of 5 mm width over a 300 mm width of the intermediate body is introduced into the middle of two left and right pulleys that rotate in reverse in one plane, Japanese Patent Publication No. 57-30368 "Transverse stretching device for membranes and fiber materials" in which the left and right ears of the membrane body are sandwiched between a pulley and a circulating belt, respectively, and stretched laterally along the path of the pulley's widening end. '' was heated in a hot water tank at 100°C and stretched 40 m/min in the length direction, then laterally stretched 8 times S, and 1 on each of the front and back surfaces of the stretching pulleys arranged symmetrically.
One of the film thread parallel layers taken out one by one was taken in one direction through the underside of the equipment floor, and the horizontal length was 2.
A web (Fig. 1) having stretched film threads of 4 m long and 500 d in thickness, each having one strand at an interval of 2.5 mm, was obtained.

Its basis weight was approximately 22 g/m. The horizontally parallel film threads are stacked 60 mm against the edge using the process equipment shown in Figure 6 of this application.
The HDPE reticulated warp web was expanded to twice its width using a nip roller at a position of 20° and 20' on a diagonally parallel film yarn layer that was guided in a 0-inclined manner so that the yarn density was 25.5 yym and the width was 2.05 m. A glued web of 7 g/lri of ethylene vinyl acetate hot-melt glue was laminated onto the material with a basis weight of 10 g/lri, and immediately after that, the non-stretched edges were cut and the part to which no glue adhered was collected. Then, a 2 m wide diagonal non-woven fabric of film yarn was wound up on the back.

A diagonal parallel film of the diagonal nonwoven fabric obtained as described above is fed through the preheating roller from the left and right so that the yarn side is in contact with the heating drum surface.
A 0.9/m wrinkled kraft paper was inserted, and these three sheets were pressed together through a pressing roller to a width of 2 m.
Symmetrical diagonal film yarn basis weight 51 g/lri', reticulated warp web basis weight 20 g/lri', kraft paper weight 100 g/m
We have created a reinforcing paper for containers that has breathability.

Example 2 1000d was applied to the starch cloth machine by the method of patent No. 835956
The glass thread is warped into a cylindrical shape in 5-pitch warps and moved from the top to the bottom, and the EVA hot melt glue fibers are injected from the spinneret of a rotating body at the center of the cylinder to the glass thread at a rate of 5 g/m.
After spraying and adhesion, the flat plate with a width of 1 m is taken up and supplied to the weft web of a laminating machine using the method described in Patent No. 956336, which is cut into 1100 mm lengths. A circulation belt that lifts the weft web. Among them, the belt for lifting the front and rear ends of the cut weft web was made of four 600 d hot-melt glued glass threads arranged in parallel at a pitch of 3, and L1 was used as a one-way lifting belt, and the belt was used as a photographic material to form a continuous weft thread. (Fig. 1) was made, and after going through the process shown in Fig. 6, a long roll of diagonal nonwoven fabric with a width of 950 mm, in which the weft glass thread was inclined at 60 degrees with respect to the photographic material, was sent to a PVC corrugated plate factory.

Two pieces of internally plasticized PVC sheets with a thickness of 0.4 mm extruded from a calender at the same factory are sandwiched between two pieces of the above-mentioned diagonal nonwoven fabric made of glass thread in a reverse diagonal shape, and pressed to form a wave. It was shaped and cut into regular lengths every 6 times, and passed through a semi-flame-retardant PVC corrugated sheet containing diagonally crossed non-woven glass threads.

In this case, noteworthy features were that defoaming was easier and wave bending was easier than when glass-based woven fabric was used as the core material.

Of course, the cost was lower than that of woven fabric, and the product was thinner and more practical.

[Brief explanation of drawings]

Fig. 1 shows an intermediate material in which the ends of substantially perpendicular parallel fiber layers of constant length are fixed between the left and right selvedge materials, Fig. 2 shows the structure of the product obtained according to the present invention, and Fig. 3 shows a reverse oblique Fig. 4 shows the product structure when the parallel fiber layers are symmetrically and anti-obliquely crossed and the longitudinal fiber materials are stacked;
Figure 5 shows a configuration diagram in which the parallel fiber layers are symmetrical and anti-oblique, and the fiber materials are laminated in the vertical and horizontal directions. The horizontally parallel fiber layer becomes a diagonally parallel fiber layer by passing through two sides of a triangle, and this is a schematic plan view of the main part of the continuous production process of a product in which another warp fiber material is attached. Explanation of main symbols: In Figures 1 and 2, 1°2 is the photographic material, 3 is the horizontally parallel fiber layer, and in Figure 6, 1L12 is the photographic material, and 13 is the horizontally parallel fiber of the raw material. Layers 14 and 14' are pinch rollers on the supply side, and layers 115 and 15' are pinch rollers on the withdrawal side.
117 is a roller with a right edge guide groove, 18 is a diffraction roller, and 23 is a diagonal nonwoven fabric of the product.

Claims (1)

[Scope of Claims] 1. In the first step, a horizontally parallel layer of a large number of fiber materials whose ends are fixed to the left and right ear materials that move at a constant speed at a constant interval l is made, and in the process of running in the length direction, When the parallel fiber material is deformed to form the desired oblique angle θ with respect to the photographic material, the distance between the photographic materials is set to 4 sin.
θ, the fallen photographic material is shifted forward or backward relative to the other photographic materials by 1CO3θ, and then tension is applied in the direction of the weft fiber material, and after that it moves parallel at a constant speed to narrow the diagonal between the photographic materials. 1. A method for producing a diagonal nonwoven fabric body made of fiber material, characterized in that the arrangement of the diagonal parallel fiber materials is fixed by attaching another fiber material layer in a manner that intersects with the parallel fiber materials. 2. In the method of claim 1, one photographic material is placed below (or above) the parallel fiber material layer in the direction of entry, as a method of shifting one photographic material forward or backward relative to the other photographic material. One photographic material is sandwiched between the grooved guide roller and the presser roller, and the other photographic material is forced to follow a straight course, while the sandwiched photographic material follows a course that forms two sides of a triangle. A method for manufacturing a diagonal non-woven fabric body of a fiber material, which is characterized by being traceable. 3 In the method of claim 1, as a method of shifting one photographic material forward (or backward) with respect to the other photographic material, one photographic material is placed below (or above) the parallel fibers in the direction of entry. One photographic material is sandwiched between the grooved guide roller and the presser roller, and the other photographic material is forced to follow a straight course, while the sandwiched photographic material follows a course that forms two sides of a triangle. 1. A method for producing a diagonally parallel non-woven fabric made of fiber material, which comprises applying tension in the direction of the diagonally parallel fiber material using a cross guider near the end of the course. 4. A method for manufacturing a diagonal nonwoven fabric body made of fibrous materials according to the method of claim 1, characterized in that another fibrous material layer that fixes the arrangement of the diagonally parallel fibrous materials is a layer of parallel warp fibrous materials. . 5 In the method of claim 1, another fiber material layer for fixing the arrangement of the diagonally parallel fiber materials is a diagonally parallel fiber material layer in which the respective diagonally parallel fiber materials are arranged so as to cross inversely. A method for producing an oblique nonwoven body of a fiber material, characterized by: