JPH0613417B2 - Glass fiber bundle package and manufacturing method thereof - Google Patents

Description

TECHNICAL FIELD The present invention relates to a glass fiber bundle packing body in which a glass fiber bundle such as a glass strand and a roving is housed in a container, and a manufacturing method thereof.

"Prior Art" Conventionally, glass fiber bundles such as glass strands are formed by forming a molten glass raw material into a large number of filaments by a bushing, applying a sizing agent to the filaments to bundle the filaments, and winding the glass fiber bundle into a winding drum. It is manufactured by winding it on the paper tube set in. The glass fiber bundle thus wound on the paper tube is dried together with the paper tube,
After that, the paper tube is pulled out to obtain a cake that is a roll of glass fiber bundles.

Glass roving is often manufactured by arranging a large number of the above cakes and drawing out a large number of glass fiber bundles, and then further concentrating these, but increasing the number of filaments extracted from the bushing to condense them at once. In some cases, it is manufactured. The strands and the rovings are common in that they are glass fiber bundles in which a large number of glass filaments are bundled.

These glass fiber bundles are used as materials such as FRP and glass cloth. A filament winding (FW) molding method, in which a glass fiber bundle is wound around a cylindrical mold and a resin is applied and impregnated and the resin is cured to form a cylindrical body, is known as one example of the use for FRP. There is.

[Problems to be Solved by the Invention] However, in the conventional method for producing a glass fiber bundle, when starting winding the glass fiber bundle around the paper tube set on the winding drum, first, the glass fiber bundle is fed to the auxiliary winding machine ( Pull the paper on the winding drum, attach the paper tube to the winding drum, rotate the winding drum, remove the glass fiber bundle from the auxiliary winding machine to the preliminary winding position of the winding drum, and manually wind it. It is necessary to gradually increase the rotation of the drum to move it to a regular winding position (paper tube) when it reaches a predetermined rotation number. The above operation must be repeated every time the glass filament is cut and the winding operation is interrupted.

Furthermore, when the glass fiber bundle wound on the paper tube is dried, the components of the sizing agent accumulate on the inner and outer circumferences of the roll of the glass fiber bundle when the water moves to the surface layer, so after removing the paper tube It was necessary to remove the inner and outer peripheral parts of the roll, on which the components of the sizing agent have accumulated, as defective parts.

As described above, the conventional method for manufacturing a glass fiber bundle has a very complicated manufacturing process and has many manual parts, resulting in poor production efficiency. Further, many parts are wasted in the winding process and the drying process, and the product yield is not good.

On the other hand, in the conventional product form of the glass fiber bundle, as shown in FIG. 5, a coil 11 wound in a traverse shape is formed, and the end of the glass fiber bundle 13 is pulled out from the inside 12 of the coil 11. I am trying. However, when the glass fiber bundle 13 is pulled out in this way, a large number of twists 14 occur in the glass fiber bundle 13.

The coils 11 are packaged one by one in a container 15 such as a cardboard box and shipped as shown by an imaginary line in the figure. In this case, the end of the glass fiber bundle 13 is pulled out from the container 15 and connected to the end of the coil 11 accommodated in the adjacent container 15 by the knot 16. That is, the glass fiber bundle 13 of each coil 11 is connected by the knot 16 so that the glass fiber bundle 13 can be continuously supplied over a large number of coils 11.

The twist 14 and the knot 16 as described above are, for example, FW.
When used in the molding method, the following problems occur. That is, in the FW molding method, the glass fiber bundles 13 are lined up and wound around the outer periphery of the cylindrical mold. However, if there is a twist 14 in the middle of the glass fiber bundles 13 as shown in FIG. Occurs. Also, as shown in FIG. 7, when there is a knot 16 in the middle of the glass fiber bundle 13, a gap 17 is formed at that portion. When the gap 17 is formed in the array of the glass fiber bundles 13 in this manner, the strength of the gap is reduced, which becomes a serious problem in products such as leaf springs that require high strength. Further, such a gap 17 causes unevenness on the surface of the product, and thus the appearance is deteriorated.

Further, since the fibers are tightly bundled in the twisted portion 14 and the knot portion 16, when the FRP material is used, there is a problem that the resin is not soaked so well that an inhomogeneous portion is formed.

Therefore, in order to reduce the adverse effect of the twist 14, the glass fiber bundle 13 is often formed into a shape having a cross section close to a circle. That is, when the cross section is close to a circle,
This is because it becomes difficult to form a bulge ball due to the twist 14. However, when the cross section of the glass fiber bundle 13 has a shape close to a circle, the resin is less likely to penetrate into the glass fiber bundle 13. Therefore, considering that the glass fiber bundle 13 is impregnated with resin, it can be said that the glass fiber bundle 13 preferably has a flat cross-sectional shape.

Further, since the conventional roving is wound into a cylindrical shape by a winder, unless a large amount of a sizing agent containing a fiber treatment agent is attached to the glass fiber bundle, the fiber bundles will slide and be wound into a cylindrical shape. It is difficult to form the fiber during operation. For this reason, the conventional roving has a large amount of the fiber treatment agent adhered thereto, but in some cases, a small amount of the fiber treatment agent adhered may be required depending on the application.

Therefore, an object of the present invention is to simplify the glass fiber bundle manufacturing process, improve the product yield, and reduce the occurrence of twist when the glass fiber bundle is pulled out and the glass fiber bundle packing body. To provide a manufacturing method.

"Means for Solving the Problem" In order to achieve the above object, the glass fiber bundle packing body of the present invention has an undried glass fiber bundle having a water content of 1 to 20% that is housed in a laminated manner in a container, or The glass fiber bundle is dried in the above state.

Further, the method for producing a glass fiber bundle packing body of the present invention, the molten glass raw material is formed into a large number of filaments from a bushing, a sizing agent is applied to the filaments to bundle the filaments, and the filaments are sandwiched between a guide roll and a rotating drum and pulled. However, the glass fiber bundle thus formed is introduced into a container in an undried state having a water content of 1 to 20%, and the glass fiber bundle is stacked and stored in the container, or after being stored in the container, the glass fiber bundle is further dried. It is characterized by

In a preferred aspect of the present invention, the undried glass fiber bundles are successively stacked and housed in a plurality of containers.

Further, a container having a vent is used as the container.

The major axis / minor axis in the cross section of the undried glass fiber bundle is 4 or more.

Furthermore, when the glass fiber bundle is pulled out from the container, the number of twisted points is set to 1/3 m or less.

In one of the preferred embodiments of the present invention, the amount of the fiber treatment agent other than water attached in the dried state of the glass fiber bundle is 0.
It is set to 01-0.5wt%. The adhesion amount of the fiber treatment agent other than water is adjusted by adjusting the components of the sizing agent and the application amount.

[Operation] In the present invention, the melt-spun glass fiber bundle is not wound on a paper tube but is directly laminated and stored in a container in an undried state with a water content of 1 to 20%. Pre-winding of the glass fiber bundle at the start of winding, no need for complicated operations such as hanging.

Further, by successively laminating and accommodating the melt-spun glass fiber bundles in a plurality of containers, it is possible to continuously pull out the glass fiber bundles at a constant speed for a long time. .

Further, the glass fiber bundle can be dried in a state of being housed in a container. In this case, since the glass fiber bundle is laminated with a relatively low bulk density, the evaporation of water is averaged as a whole. Therefore, the components of the sizing agent do not accumulate at specific locations, and the occurrence of defective parts due to the accumulation of the components of the sizing agent is extremely reduced.

Therefore, according to the present invention, it is possible to simplify the manufacturing process, improve the workability, and increase the product yield.

In the present invention, it is necessary that the glass fiber bundle is directly laminated on the container in an undried state having a water content of 1 to 20%. When the glass fiber bundle is introduced into the container in a dried state with less than 1% of water content, the glass fiber bundle has a high rigidity, so that the bulk density of the glass fiber bundle contained in the container is remarkably reduced, and the product becomes bulky. Is inconvenient to transport and handle. Further, if the glass fiber bundle is introduced into the container in a state where the water content exceeds 20%, it becomes difficult to dry the glass fiber bundle after it is housed in the container, which requires drying time and cost. Further, troubles such as the glass fiber bundle adhering to the container are likely to occur.

If the container is provided with a vent, drying can be performed more efficiently.

In addition, if the melt-spun glass fiber bundles are successively stacked and stored in a plurality of containers, the glass fiber bundles contained in each container become continuous, and the labor of connecting the glass fiber bundles at the time of use can be reduced. It eliminates the need for a knot at the connecting part.

Further, when the glass fiber bundle is pulled out from the glass fiber bundle packaging body of the present invention and used for various purposes, a great advantage that the glass fiber bundle is not twisted is obtained. That is,
In the present invention, since the glass fiber bundle is dropped into the container as it is and laminated, the glass fiber bundle without twist can be supplied by pulling it out as it is.

More specifically, when the glass fiber bundle is pulled out from the container, the number of twists can be reduced to 1/3 m or less. This is a glass fiber bundle of 10 mm
It is a measurement result when it is drawn out while being hooked on a round bar with a diameter of 100 g.

Since the glass fiber bundle is laminated, the glass fiber bundle may have a habit when it is pulled out, but this habit can be easily corrected by pulling with an appropriate tension.

In this way, the glass fiber bundle is not twisted and there is no knot at the connecting portion, so the glass fiber bundle of the present invention is suitable for the following applications.

By applying a resin powder to the glass fiber bundle and heating it or applying a liquid resin to impregnate the glass fiber bundle with the resin, pass this resin through a die to form a string-shaped uncured FRP, and cut it. Applications for producing thermoplastic pellets. …
This pellet is used as a reinforcing material for FRP,
If the glass fiber bundle has a twist or a knot, the portion is less likely to be impregnated with the resin, and a uniform FRP cannot be obtained.

Applications for manufacturing roving cloth. … When used for high-grade applications, it is necessary to use glass fiber bundles without twists or knots.

Applications used in the FW molding method described above. When applied to the FW molding method, it becomes possible to arrange the glass fiber bundles without a gap, and it is possible to obtain a high-strength molded product having a good appearance.

Furthermore, since the glass fiber bundle is not twisted, it is possible to adopt a glass fiber bundle having a major axis / minor axis of 4 or more in the cross section, and such a flat shape is impregnated with resin inside. Since it becomes easier, the strength of the molded product in the FW molding method or the like can be further improved.

Further, in the present invention, even if the content of the fiber treatment agent contained in the sizing agent or the coating amount of the sizing agent is reduced, it is possible to produce the glass fiber bundle, so that the glass fiber bundle is dried in a state other than water. It is also possible to obtain a glass fiber bundle in which the amount of the fiber treatment agent attached is 0.01 to 0.5 wt%.

[Example] Fig. 1 shows an example of an apparatus for manufacturing a glass fiber bundle package according to the present invention.

The glass raw material 21 is put into the electric melting furnace 22, and the molten glass 2
It becomes 3. The molten glass 23 drops from the bushing 24 and is formed into many filaments 25. These filaments 25 are pulled out downward, and a sizing agent 26 'is applied by an applicator roll 26 on the way. The sizing agent 26 'is formed by adding an organic or inorganic surface treatment agent to water as needed. The filament 25 coated with the sizing agent 26 ′ is focused by the gathering shoe 27 and becomes a glass fiber bundle 28.

The glass fiber bundle 28 is stretched on the idle roller 29 and then stretched on the rotary drum 30. The rotating drum 30 is
A rubber band 31 is attached to the outer circumference. Rotating drum 3
0 is rotated at a high speed in a direction indicated by an arrow in the drawing in conjunction with a driving device (not shown). The guide roll 32 is arranged in contact with the rotary drum 30 so as to be opposed to each other, and the glass fiber bundle 28 is sandwiched between the rotary drum 30 and the guide roll 32, and is drawn downward at a predetermined speed. The guide roll 32 is supported so as to come into contact with and separate from the rotary drum 30 as needed.

The falling glass fiber bundle 28 is introduced into a container 34 of a cardboard box arranged below through a guide 33. A plurality of containers 34 are placed on the conveyor 35,
Is operated to intermittently send out in a direction indicated by an arrow in the figure. The glass fiber bundle 28 is dropped and stacked in the container 34 arranged immediately below it. In this case, the glass fiber bundle 28 is in an undried state with a water content of 1 to 20%. When the glass fiber bundle 28 has too much water, it may be dried by blowing hot air or the like while falling from the rotary drum 30 and the guide roll 32.

The glass fiber bundles 28 dropped into the container 34 may be randomly stacked, but in order to increase the bulk density, it is preferable to stack the glass fiber bundles 28 on a tuna roll. In this case, the bulk density can be further increased by increasing the height of the container 34 and stacking the glass fiber bundles 28 higher. Since the glass fiber bundle 28 usually has a certain degree of rigidity, it tends to be naturally laminated in the above-mentioned tuna roll just by dropping it into the container 34, but by moving the guide 33 as necessary, It can be surely wound with tuna. However, when the water content of the glass fiber bundle 28 is less than 1%,
The rigidity is too strong, and it becomes difficult to increase the bulk density and stack the layers. In the glass fiber bundle packaging body of the present invention,
The bulk density of the contained glass fiber bundle is preferably 0.4 to 0.8 kg /.

When the glass fiber bundle 28 is stacked in a predetermined amount on the container 34 and becomes almost full, the conveyor 35 operates to move to the next empty container 3
4 is moved directly below the falling glass fiber bundle 28.
Then, the glass fiber bundles 28 are again stacked in the empty container 34, and in the same manner, the glass fiber bundles 28 are successively stacked and accommodated in the plurality of containers 34 in the same manner. Glass fiber bundle 28
The glass fiber bundles 28 are continuously accommodated in the plurality of containers 34 unless they are cut off halfway.

The container 34 filled with the glass fiber bundle 28 is a conveyor 35.
It is moved by, and the product is commercialized by closing the lid at the end of the conveyor 35. Note that the glass fiber bundle 28 may be dried by blowing hot air H in the middle of the convey path of the conveyor 35. Further, the drying may be performed by placing the glass fiber bundle 28 in the container 34 and putting the container 34 together in a drying furnace. Further, the glass fiber bundle 28 may be shipped as a product without being dried and dried by the customer.

FIG. 2 shows an example of the glass fiber bundle package of the present invention thus obtained.

The container 34 formed of a rectangular parallelepiped cardboard box has a lid plate 36, and the lid plate 36 is formed with an insertion piece 36a.
The glass fiber bundle 28 is accommodated in this container 34 by being wound with a tuna roll and laminated. Both ends 28 of the glass fiber bundle 28
a and 28b are pulled out from the container 34. The lid plate 36 is formed with notches 36b and 36c for taking out the ends 28a and 28b. Further, a plurality of ventilation holes 37 are formed in the container 34, and the ventilation holes 37 efficiently dry the glass fiber bundle 28.

FIG. 3 shows a state in which a plurality of the glass fiber bundle packing bodies are assembled.

A plurality of containers 34 are arranged and placed on a pallet 38, and the lid plate 36 is closed and packed with tape 39. As described above, the glass fiber bundle 28 is placed in the plurality of containers 34.
The glass fiber bundles 28 accommodated in the adjacent containers 34 are drawn out from the notches 36b and 36c of the cover plate 36 and are connected to each other by successively and sequentially stacking and accommodating the glass fiber bundles. Therefore, the glass fiber bundle 28 can be continuously supplied for a long time.

FIG. 4 shows the shape of the glass fiber bundle 28 preferably used in the present invention.

The glass fiber bundle 28 is formed by bundling a large number of filaments 25. It should be noted that although the drawing is a schematic illustration, it is actually composed of hundreds to thousands of filaments 25 bundled together. In this embodiment, the ratio of the major axis a to the minor axis b in the cross section of the glass fiber bundle 28, a /
It has a flat shape such that b is 4 or more. Therefore, for example, when the resin is impregnated in the FW molding method or the like, the resin is rapidly impregnated to the central portion of the glass fiber bundle 28, so that the strength of the obtained molded product can be increased.

When the glass fiber bundle 28 is pulled out from the glass fiber bundle packing body of the present invention, the glass fiber bundle 28 is not twisted as shown in FIG. That is, this is because the glass fiber bundle 28 is dropped into the container 34 and the laminated product is taken out as it is. As described above, the glass fiber bundle 28 can be continuously supplied without twisting and with almost no connecting portion, and thus is suitable for various applications such as the FW molding method as described above.

"Effects of the Invention" As described above, according to the present invention, the glass fiber bundle is directly laminated and stored in a container in an undried state with a water content of 1 to 20%. Can be simplified to improve the production efficiency and improve the product yield. Further, since the glass fiber bundle is not twisted when the glass fiber bundle is pulled out from the container, it is suitable for various applications such as the FW molding method. Further, since the glass fiber bundle is not twisted, it is possible to use a glass fiber bundle having a flat cross section, and it is possible to easily impregnate a resin in manufacturing FRP or the like. In addition, by successively stacking and storing the glass fiber bundles in a plurality of containers, the glass fiber bundles contained in each container become continuous, and the glass fiber bundles are continuously formed for a long time. Can be supplied. Furthermore, it is also possible to obtain a glass fiber bundle in which the amount of the fiber treatment agent other than water attached in the dried state of the glass fiber bundle is 0.01 to 0.5 wt%.

[Brief description of drawings]

FIG. 1 is a schematic configuration diagram showing an example of an apparatus for carrying out the method for manufacturing a glass fiber bundle package of the present invention, and FIG. 2 is a perspective view showing an example of the glass fiber bundle package of the present invention. FIG. 3 is a perspective view showing a state in which the glass fiber bundle packages are assembled, FIG. 4 is a partially enlarged perspective view showing the shape of a glass fiber bundle preferably used in the present invention, and FIG. 5 is a conventional glass fiber bundle. FIG. 6 is a perspective view showing a product form, FIG. 6 is a partially enlarged view showing an arrangement state of glass fiber bundles in a twisted portion when a conventional glass fiber bundle is applied to a FW molding method, and FIG. It is a partially enlarged view showing a glass fiber bundle arrangement state in a knot portion when applied to a molding method. In the figure, 22 is an electric melting furnace, 23 is molten glass, 24 is a bushing, 25 is a filament, 26 is an applicator roll, 26 'is a sizing agent, 27 is a gathering shoe, 28
Is a glass fiber bundle, 28a and 28b are ends, 30 is a rotating drum, 32 is a guide roll, 34 is a container, 35 is a conveyor, 36 is a cover plate, and 37 is a vent.

Claims (13)

[Claims] 1. A glass fiber bundle packing body in which undried glass fiber bundles having a water content of 1 to 20% are stacked and contained in a container. 2. A glass fiber bundle packing body, wherein undried glass fiber bundles having a water content of 1 to 20% are stacked and contained in a container, and the glass fiber bundle is dried in that state. 3. The glass fiber bundle packing body according to claim 1, wherein the glass fiber bundles are successively stacked and accommodated in a plurality of containers. 4. The glass fiber bundle packing body according to claim 1, wherein the container has a vent hole. 5. The glass fiber bundle packing body according to claim 1, wherein the cross section of the glass fiber bundle has a major axis / minor axis of 4 or more. 6. The glass fiber bundle packing body according to any one of claims 1 to 5, wherein when the glass fiber bundle is pulled out from the container, the number of twists is 1/3 m or less. 7. The amount of the fiber treatment agent other than water deposited in the dried state of the glass fiber bundle is 0.01 to 0.5 wt%.
The glass fiber bundle packaging body according to any one of to 6. 8. A molten glass raw material is formed into a large number of filaments by a bushing, a sizing agent is applied to the filaments to bundle the filaments, and the filaments are sandwiched between a guide roll and a rotary drum and pulled out. Water 1
A method for producing a glass fiber bundle packaging body, which comprises introducing -20% undried state into a container, and stacking and accommodating in the container. 9. A molten glass raw material is formed into a large number of filaments by a bushing, a sizing agent is applied to the filaments to bundle the filaments, and the filaments are sandwiched between a guide roll and a rotary drum and pulled out. Water 1
A method for manufacturing a glass fiber bundle packing body, which comprises introducing the glass fiber bundle in an undried state of -20% into a container, stacking the glass fiber bundle in the container, and drying the glass fiber bundle. 10. The method for producing a glass fiber bundle package according to claim 8 or 9, wherein the glass fiber bundle is continuously introduced into a plurality of containers in a continuous state to be stacked and housed. 11. The method for manufacturing a glass fiber bundle package according to claim 8, wherein the container having a vent is used. 12. The glass fiber bundle package according to claim 8, wherein the glass fiber bundle is formed so that the major axis / minor axis in the cross section of the glass fiber bundle is 4 or more. Law. 13. The composition and the coating amount of the sizing agent are adjusted so that the amount of the fiber treatment agent other than water attached in the dried state of the glass fiber bundle is 0.01 to 0.5 wt%. 1. A method of manufacturing a glass fiber bundle packing body according to one.