KR20030027831A - Oriented glass fiber mat and method of producing the same - Google Patents

Abstract

PURPOSE: To provide a glass fiber mat tending to elongate unidirectionally in a condition of being impregnated with a resin and having unidirectional physical properties including mechanical strength and others when the resin is cured, and to provide a method for producing the glass fiber mat. CONSTITUTION: This mat has the following structure: 60 wt.% or greater of glass fibers 1 accumulated in layers are oriented unidirectionally, the accumulated glass fibers 1 are sewn with yarns 2 in the direction rectangular to the oriented direction of the glass fibers 1, bound with a solvent-soluble binder, or entangled with glass fibers raised by needle punching. The other objective method for producing this mat comprises unidirectionally orienting most of the glass fibers by a specific glass fiber orientation device and accumulating them, and then sewing them, impregnating them with the binder, or subjecting them to needle punching.

Description

ORIENTED GLASS FIBER MAT AND METHOD OF PRODUCING THE SAME}

The present invention relates to an oriented glass fiber mat in which at least 60% of the glass fiber is oriented in one direction and a method of manufacturing the same.

When lining the inner surface of sewage pipes and the like, a tube in which a curable resin is impregnated into a glass fiber mat is frequently used. The fiberglass mat used for this tube should be easy to extend in the circumferential direction of the tube at the time of lining, and if the fiberglass mat is difficult to extend in the circumferential direction, it is difficult to adhere the tube to the inner surface by air or water pressure at the time of lining There is a defect. In addition, when the impregnated resin cures after lining, it is required to be a glass fiber mat capable of imparting great strength in the circumferential direction.

Similarly, in other applications, there is also considered a case where a glass fiber mat which is easy to extend in one direction in the state in which the resin is impregnated and which has good strength and other physical properties in one direction when the impregnated resin is cured is considered.

However, at present, it is easy to extend in one direction while the resin is impregnated, and when the impregnated resin is cured, it is an undeveloped state that can be satisfactorily used as a glass fiber mat having good strength and other physical properties in one direction. Can not be found.

This invention is made | formed in view of such a situation, Comprising: It is easy to extend in one direction in the state which impregnated resin, and when the impregnated resin hardens, it provides the oriented glass mat which has a favorable physical property in one direction, and its manufacturing method is provided. It is aimed at.

In order to achieve the above object, in the oriented glass fiber mat of the present invention, more than 60% of the laminated glass fibers are oriented in one direction, and the laminated glass fibers are sewn in a direction orthogonal to the alignment direction of the glass fibers. It is characterized by being.

Since the laminated glass fibers are sewn with thread, such an oriented glass fiber mat is not dispersed separately but becomes a sheet-like mat such as quilting and is easy to handle. In addition, since the mat is at least 60% of the glass fibers are oriented in one direction, and the direction of sewing with the yarn is a direction orthogonal to the orientation direction of the glass fibers, the orientation of the glass fibers in the state of impregnating the resin or in the state of no impregnation. When tensile force is applied in the direction, the glass fiber is easily displaced in the alignment direction and easily extends. Also, when the impregnated resin cures, the mechanical strength in the orientation direction (for example, tensile strength, bending strength, bending elastic modulus, etc.) is greatly improved. do.

Another oriented glass fiber mat of the present invention to achieve the above object is that more than 60% of the glass fibers laminated in a layer shape is oriented in one direction, the laminated glass fibers are bonded to the solvent by a soluble binder. It is to be done.

Since the oriented glass fiber mat is laminated with the glass fibers bonded by a binder, the glass fibers are not separated separately, and thus the handling is easy. In addition, if more than 60% of the glass fibers are oriented in one direction and the resin is impregnated, the binder dissolves in the solvent and the glass fibers are separated from each other. Thus, when the tensile force is applied in the alignment direction of the glass fibers, the glass fibers are displaced in the orientation direction. When the impregnated resin is cured, the mechanical strength in the orientation direction is greatly improved.

Another oriented glass fiber mat of the present invention to achieve the above object is that more than 60% of the laminated glass fibers are oriented in one direction, and the laminated glass fibers are entangled with the glass fibers erected by a needle punch. It is characterized by.

Such an oriented glass fiber mat is easy to handle because the laminated glass fibers are entangled with the glass fibers erected by a needle punch, so that the glass fibers are not separated separately. In addition, since 6 or more of the glass fibers are oriented in one direction, when a tensile force is applied in the orientation direction of the glass fibers in a state of impregnating or not impregnating the resin, the glass fibers are easily displaced in the alignment direction and extend easily. When the impregnated resin cures, the mechanical strength in the orientation direction is greatly improved.

In each of the above-mentioned oriented glass fiber mats, it is preferable to provide a plurality of reinforcing chambers in a direction perpendicular to the alignment direction of the glass fibers in the inside of the mat or the mat surface layer. In this way, the tensile strength of the direction orthogonal to the orientation direction of glass fiber can also be improved by a reinforcement chamber.

On the other hand, in the method of manufacturing the oriented glass fiber mat of the present invention, a plurality of elongated alignment members having a triangular cross-sectional shape above the belt conveyor are arranged in parallel with each other in parallel with each other in a direction perpendicular to the advancing direction of the belt conveyor. It is characterized by having the orientation and lamination | stacking process of the glass fiber which supplies a glass fiber on an orientation member, vibrating each orientation member simultaneously, and drops a glass fiber to a belt conveyor from the mutual gap of an orientation member.

In this manufacturing method, in the orientation and lamination process of the glass fibers, most of the glass fibers are oriented in the direction orthogonal to the advancing direction of the belt conveyor by the alignment member, and fall to the belt conveyor from the gap between the alignment members. More than 60% of the glass fibers laminated in layers on the conveyor are oriented in one direction (direction perpendicular to the traveling direction of the belt conveyor). And since vibration is given to an orientation member, glass fiber does not slide down the inclined surfaces of both sides of an orientation member effectively, and does not accumulate on an orientation member. Accordingly, the oriented glass fiber mat of the present invention in which 60% or more of the glass fibers are oriented in one direction can be produced easily and reliably.

In another manufacturing method of the present invention, a plurality of alignment rollers are disposed above the belt conveyor at right angles to the advancing direction of the belt conveyor so as to be parallel to each other with a gap therebetween, such that the rotation direction of the alignment rollers is reversed at one interval. Also, the glass fibers are fed onto the alignment rollers while rotating the alignment rollers in such a manner that the orientation rollers of both ends are turned inward, and the glass fibers are dropped onto the belt conveyor from the gap between the alignment rollers. It has a lamination process.

In this manufacturing method, in the orientation and lamination process of the glass fibers, the glass fibers fall on the belt conveyor while most of them are oriented in a direction orthogonal to the traveling direction of the belt conveyor through the gap between the alignment rollers inverting each other. More than 60% of the glass fibers laminated in layers on the conveyor are oriented in one direction (direction perpendicular to the traveling direction of the belt conveyor). And since the orientation rollers are rotating, the glass fibers do not accumulate on the alignment rollers, and since the rotation direction of the alignment rollers at both ends is inward, the glass fibers do not flow down to both sides. Accordingly, the oriented glass fiber mat of the present invention in which 60% or more of the glass fibers are oriented in one direction can be easily and reliably produced.

In each of the above manufacturing methods, a sheet such as quilting, in which the glass fibers are not segregated separately, when the glass fibers laminated in the orientation and the reddening process of the glass fibers are sewn with threads in a direction orthogonal to the orientation direction of the glass fibers in the next step. The mat which is easy to handle a shape can be obtained.

In each of the above production methods, when the glass fibers laminated in the orientation and lamination of the glass fibers are impregnated with the binder dissolved in the solvent in the next step, the glass fibers are bonded to the binder and are not separated separately. Easy mats can be obtained.

Further, in each of the above production methods, when some glass fibers are erected by treating the glass fibers laminated in the orientation and lamination step of the glass fibers with a needle punch in the next step, the glass fibers erected are entangled with other glass fibers. It is possible to obtain an easy-to-handle mat in which the fibers do not separate separately.

1 is a perspective view of an oriented glass fiber mat according to an embodiment of the present invention.

2 is a cross-sectional view of an oriented glass fiber mat according to another embodiment of the present invention.

Figure 3 is a plan view of a glass fiber alignment apparatus used in the manufacturing method according to an embodiment of the present invention.

4 is a cross-sectional view of the same device.

5 is an explanatory diagram of an alignment member in the same apparatus.

6 is an explanatory diagram of vibration imparting means in the same apparatus.

7 is a plan view of a glass fiber alignment device used in the manufacturing method according to another embodiment of the present invention.

8 is a front view of the same device.

9 is an enlarged cross-sectional view of the same device.

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

1 is a perspective view of an oriented glass fiber mat according to an embodiment of the present invention, wherein the oriented glass fiber mat (M) is at least 60%, preferably at least 70% of the glass fibers (1) laminated in a layer shape. Oriented in one direction, the laminated glass fibers 1 are sewn in a direction perpendicular to the orientation direction of the glass fibers 1 with the yarn 2 so that the laminated glass fibers 1 are not separated separately.

As the glass fiber 1, glass fiber (cut glass fiber) having a length of at least 10 mm or more, preferably about 30 to 100 mm is used. Glass fibers shorter than 10 mm in length are inadequate because of poor orientation. Although the thickness of the glass fiber 1 is not specifically limited, In view of handleability, strength, etc., what has a fiber diameter of about 10-30 micrometers is used suitably.

Although the thickness (in other words, lamination amount of glass fiber) of this oriented glass fiber mat M changes with a use, it is generally preferable to laminate by thickness of about 200-1200 g / m <2>. This makes it difficult to form or sew the mat when it is thin, and the handleability is deteriorated when it is thicker than this. Moreover, what is necessary is just to overlap the said mat M, when a thick oriented fiberglass mat is needed.

As the thread 2 for sewing, synthetic resin systems, such as polyester or nylon, which have high strength, are preferably employed.

Since 60% or more, preferably 70% or more of the glass fiber mat M is oriented, the tensile force is applied to the alignment direction of the glass fiber 1, so that the glass fiber 1 Deviates in the alignment direction and is easy to extend, and furthermore, the glass fibers 1 are sewn separately in the synthetic resin chamber 2 in a direction orthogonal to the orientation direction to form a sheet-like mat such as quilting. Since the handling is easy and the direction of sewing is a direction orthogonal to the orientation direction of the glass fiber 1, the extension of the mat M (extension of the orientation direction of the glass fiber) is prevented by the yarn 2. There is no work.

Therefore, when the tube for lining is produced using the said orientation glass fiber mat M, for example, and the inner surface of sewage pipes is lined by impregnating uncured synthetic resin, the tube extends to a circumferential direction by air pressure or water pressure. The inner surface lining layer can be formed to be in close contact with the inner surface of the tube and to have a large strength (pressure resistance, etc.) in the circumferential direction with curing of the resin.

2 is a cross-sectional view of an oriented glass fiber mat according to another embodiment of the present invention, wherein the oriented glass fiber mat M is orthogonal to the orientation direction of the glass fiber 1 inside the oriented glass fiber mat of FIG. 1 described above. Many reinforcement chambers 3 of which direction are to be installed in parallel at intervals.

The reinforcement chamber 3 is for giving a large tensile strength in the direction orthogonal to the orientation direction of the glass fiber 1, for example, glass roving etc. which have a thickness of about 600-2400 tex are used suitably. Glass rovings thinner than 600 tex have insufficient tensile strength, and glass rovings thicker than 2400 tex are both undesirable because they are too high in stiffness. The mutual spacing of the reinforcing chambers 3 may be appropriately determined so as to obtain the required tensile strength. However, when used in such a lining tube, the spacing of the reinforcing chambers 3 is preferably arranged at intervals of about 7 to 12 mm.

This reinforcement chamber 3 may be provided in the intermediate part of the mat M, as shown in FIG. 2, and may be provided in the surface layer part of the mat M. As shown in FIG. In the case of installing in the middle part, the reinforcing chamber 3 may be sandwiched between two mats of half thickness, and in the case of installing in the surface layer section, the reinforcing chamber 3 is simply loaded on the mat M. What is necessary is just to sew together with the glass fiber 1 in (2).

In addition to the fact that the glass fiber mat M is not separated separately by sewing, the tensile strength in the direction orthogonal to the orientation direction of the glass fiber by the reinforcing chamber 3 such as glass roving. Can be greatly improved. Therefore, if the tube for lining is produced using this mat M, for example, when the said tube is pulled in a sewage pipe etc., the possibility of a tube being subjected to a great tension can be eliminated.

Although all the above-mentioned oriented glass fiber mats M are sewn with the yarn 2 so that the glass fiber 1 may not be separated separately, the oriented glass fiber mat of this invention is a glass fiber 1 by other means than sewing. May be configured so as not to be separated separately.

One is an oriented glass fiber mat in which glass fibers are laminated in a layer shape and preferably 60% or more (preferably 70% or more) are bonded in one direction with a soluble binder in a solvent so that the glass fibers are not separated separately. .

The other is an orientation in which the glass fibers, which are stacked in a layer shape and oriented in one direction of 60% or more (preferably 70% or more), are entangled with glass fibers erected by a needle punch, so that the glass fibers are not separated separately. Fiberglass mat.

The former orientation glass fiber mat binds the glass fibers with a binder, so that it hardly extends in the orientation direction of the glass fibers, but when the resin dissolved in the solvent is impregnated, the binder dissolves in the solvent and the glass fibers separate from each other. Therefore, when the tensile force is applied in the alignment direction of the glass fibers, the glass fibers deviate in the alignment direction and easily extend, and when the impregnated resin is cured, the mechanical strength in the orientation direction is greatly improved. As a binder for bonding glass fibers, for example, a resin binder such as a polyester resin soluble in a solvent such as styrene monomer is suitably used.

On the other hand, the latter oriented glass fiber mat is only entangled with the glass fibers erected by the needle punch, so that even if the resin is impregnated even if impregnated with resin, when the tensile force is applied in the orientation direction of the glass fibers, the glass fibers are in the orientation direction. It is easy to extend | deviate and extend, and when the impregnated resin hardens, the mechanical strength of an orientation direction improves significantly. The ratio of the glass fibers erected by the needle punch can be controlled by the number of needles per unit area (1 square micrometer), the depth at which the needles are stabbed, the shape of the needles, etc., so that the laminated glass fibers are not separated and the orientation of the glass fibers is It is important to adjust the ratio so that it does not decrease.

Next, the manufacturing method of the orientation glass fiber mat which concerns on one Example of this invention is demonstrated, referring FIGS.

In the manufacturing method of this embodiment, in the alignment and lamination process of the glass fibers, a plurality of elongated alignment members 5a having a triangular cross-sectional shape above the belt conveyor 4 are provided in the advancing direction of the belt conveyor 4. The glass fiber alignment device 5 provided with the clearance gap 5j parallel to each other and orthogonal to each other is provided, and the glass fiber is supplied onto the alignment member 5a while vibrating each of the alignment members 5a in unison. Glass fibers are dropped onto the belt conveyor 4 from the mutual gaps 5j of 5a, and laminated in a layer form.

In more detail, as shown in Figs. 3 and 4, the glass fiber alignment device 5 used in this manufacturing method includes a plurality of (6) elongated alignment members 5a having a triangular cross-sectional shape. The gaps 5j are arranged in parallel with each other perpendicularly to the traveling direction of the conveyor 4 and are integrally held by the holding plates 5b and 5b on both sides. Then, the plurality of alignment members 5a held by the weaning plates 5b and 5b are disposed inside the rectangular frame 5c, and the advancing direction of the belt conveyor 4 is provided by the coil springs 5d of the four corners. It is attached to the said base 5c so that it may vibrate along.

In addition, horizontal members 5e are placed at the ends of the holding plates 5b and 5b, and arms 5g in which the tip portion 5f is bent upward are fixed to the intermediate portion of the horizontal members 5e. Then, the motor 5h incorporating the reduction gear is mounted on the base 5c, and a plurality (two pieces) of blades 5i attached to the tip of the output shaft are caught by the tip 5f of the arm 5g. It is supposed to be. Furthermore, four corners of the frame 5c are provided with casters 5k that are height-adjustable. The casters 5k are mounted on both sides of the belt conveyor 4 so that the glass fiber alignment device 5 is connected to the belt conveyor 4. ) Height adjustable and movable.

When the glass fiber alignment device 5 drives the motor 5h, the blade 5i at the tip of the output shaft rotates so as to be caught by the tip 5f of the arm 5g, as indicated by the dashed-dotted line in FIG. Since the arm 5g moves in one direction (left direction in FIG. 6) against the force of the coil spring 5d, the alignment members 5a held by the holding plates 5b and 5b are belt conveyors 4 Move in the opposite direction of direction of travel. When the blade 5i is separated from the tip portion 5f as indicated by the solid line, the arm 5g and the alignment member 5a are opposite to the above by the restoring force of the coil spring 5d (belt conveyor 4). Direction of travel). Accordingly, the arm 5g and the alignment member 5a are configured to repeat the vibration along the traveling direction of the belt conveyor 4 by the rotation of the blade 5i.

When the alignment member 5a of the glass fiber alignment device 5 is vibrated as described above, and the above-described glass fiber is supplied thereon, the glass fiber slides down the inclined surfaces on both sides of the alignment member 5a and the belt conveyor ( 4) is oriented in a direction orthogonal to the traveling direction of 4) and falls from the gap 5j between the alignment members 5a to the belt conveyor, so that at least 60% of the glass fibers are orthogonal to the traveling direction of the belt conveyor 4. Direction), and stacked.

In that case, if vibration is not given to the orientation member 5a, there is a possibility that glass fibers will pile up on the orientation member 5a. However, in this manufacturing method, the orientation member 5a is vibrated as described above. Is not likely to accumulate on the alignment member 5a, and the inclined surfaces on both sides of the alignment member 5a are slid down to fall on the belt conveyor 4 efficiently.

The alignment member 5a has a triangular-shaped cross-sectional shape as shown in Fig. 5, and its peak angle θ is 50 ° to 70 °, and those in which both inclined surfaces are smoothed are preferably used. When the top angle θ is larger than 70 °, the inclination of both inclined surfaces becomes too slow, so that the slipping of the glass fibers decreases, and thus the visible fibers are likely to accumulate on the alignment member 5a. If the angle is smaller than 50 °, the inclined yarns on both side inclined surfaces are too severe, so that the glass fibers fall to the belt conveyor 4 before the fiber is sufficiently oriented, and there is a fear that the orientation is lowered. The most preferable orientation member 5a is an orientation member whose normal angle (theta) is 60 degrees, and the width dimension t of both inclined surfaces is about 50 mm.

When the fiber length of the glass fibers is 50 mm, the gaps 5j of the mutually aligned members 5a are preferably set at about 5 to 15 mm. When the gaps are narrower than 5 mm, the glass fibers are likely to be clogged. When it is wider than mm, the orientation of the glass fiber is lowered. The most preferable gap is about 10 mm.

In the orientation and lamination process of the glass fibers, the glass fibers oriented in a layer shape while being oriented as described above are sewn with thread in a direction orthogonal to the orientation direction of the glass fibers in the next step, or impregnated with a binder dissolved in a solvent, Alternatively, a needle punch is used to erect some glass fibers. When sewing, the oriented glass fiber mat M shown in Fig. 1, such as quilting, in which glass fibers are not separated separately is obtained, and when the binder is impregnated, the glass fibers are bonded by a binder and are not separated separately. When a needle punch is applied, a mat is obtained in which the erected glass fibers are entangled with other glass fibers so that the glass fibers are not separated separately.

In the case where tensile strength is required, sewing or the like is provided in the surface layer portion of the laminated glass fibers or inside the reinforcing chambers such as glass roving in a direction orthogonal to the orientation direction of the glass fibers in parallel to each other. The orientation glass fiber mat M in which the reinforcement chamber 3 as shown in FIG. 2 was inserted is obtained.

Next, a manufacturing method according to another embodiment of the present invention will be described with reference to Figs.

In the manufacturing method of this embodiment, in the alignment and lamination process of the glass fibers, a plurality of alignment rollers 6a are orthogonal to the advancing direction of the belt conveyor 4 above the belt conveyor 4, and the gaps 6b are parallel to each other. ), The glass fiber alignment device 6 provided in parallel with each other is provided, the glass fiber is supplied onto the alignment roller 6a while the angular alignment roller 6a is rotated, and the gap 6b between the alignment rollers 6a is provided. The glass fibers are dropped onto the belt conveyor 4 and laminated in a layer form.

More specifically, the alignment rollers 6a of the glass fiber alignment device 6 are arranged in plural (six) with the gaps 6a parallel to each other in a direction perpendicular to the advancing direction of the belt conveyor 4, and on both sides. It is axially supported by the bearing part of support plates 6c and 6c, and is rotatably supported. And the gear 6d is provided in the roller shaft of the end of each orientation roller 6a, and the gear 6d of each orientation roller 6a is meshed with each other. Therefore, when any orientation roller 6a is rotated, as shown in FIG. 9, the rotation direction of the orientation roller 6a becomes the reverse direction by one space | interval. In this case, by rotating each of the alignment rollers 6a at one interval so that the rotational directions of the rollers 6a and 6a at both ends are inward, the glass fibers supplied on these alignment rollers 6a are oriented rollers at both ends. It is necessary to prevent it from flowing out from 6a and 6a.

A c-shaped base 6e is fixed to both ends of the support plates 6c and 6c on both sides of the alignment roller 6a, and a motor 6f incorporating a reduction gear is provided on the side frame of the base 6e. . As shown in Fig. 9, when the chain 6h is wound around the sprocket 6g at the output shaft end of the motor 6f and one gear 6d of the alignment roller 6a, the motor 6f is driven. While the alignment rollers 6a rotate in the opposite directions at one interval, the alignment rollers 6a and 6a at both ends rotate inward, respectively. In addition, four corners of the base 6e are provided with casters 6i that are height-adjustable. The casters 6i are mounted on both sides of the belt conveyor 4, so that the glass fiber alignment device 6 is a belt conveyor. (4) It is installed to be adjustable in height and movable.

Such a glass fiber alignment device 6 is provided above the belt conveyor 4, and each of the alignment rollers 6a is reversely rotated by one interval by the motor 6f, and the alignment rollers 6a at both ends are provided. And 6a are rotated inward, and when the above-mentioned glass fiber is supplied onto the alignment roller 6a, through the gap 6b of the alignment rollers 6a and 6a in which the glass fibers are alternately inverted, the belt conveyor 4 Since it falls in the belt conveyor 4 while being oriented in the direction orthogonal to the traveling direction of), more than 60% of the glass fibers are oriented and laminated in one direction (the direction orthogonal to the traveling direction of the belt conveyor 4). In addition, since the orientation rollers 6a are rotated, the glass fibers do not accumulate on the alignment rollers 6a, and since the orientation directions of the orientation rollers 6a and 6a are inward and inward, the glass fibers flow out to both sides. There is no work.

Although the thickness of the alignment roller 6a is not particularly limited, in the case of aligning the glass fiber having a fiber length of about 50 mm, a roller having a diameter of about 30 to 50 mm is suitable. The orientation of the glass fibers is not very good. The distance 6b between the alignment rollers is set to about 5 to 15 mm, preferably 8 to 14 mm, and narrower than 5 mm facilitates interlocking of the glass fibers. Orientation falls. Most preferably, the gap is about 10 mm.

The glass fiber alignment device used in this manufacturing method rotates each of the alignment rollers 6a through the chain 6h and the gear 6d. However, through the power transmission belt other than the chain, rubber wheels that are difficult to slip, etc. You may make it rotate.

The glass fibers laminated in a layer shape while being oriented in one direction by the above-mentioned alignment device can also be sewn with thread in a direction orthogonal to the orientation direction of the glass fibers in the following process, or impregnated with a binder dissolved in a solvent or with a needle punch. By treating and erecting some of the glass fibers, it becomes an oriented glass fiber mat in which the glass fibers are not separated separately.

Next, the physical property test performed about the orientation glass fiber mat of this invention is demonstrated.

[Property Test]

Using the glass fiber aligning apparatus shown in FIGS. 7 to 9 (diameter of the orientation roller: 50 mm, mutual gap of the alignment roller: 10 mm), the visual fibers (fiber length: about 50 mm, fiber diameter: about 2400 tex) Was fed onto the alignment roller, and the glass fibers were dropped onto the belt conveyor 4 from the mutual gaps 6b of the alignment rollers, so that most of the glass fibers were laminated in a layer shape while being oriented in the axial direction of the alignment roller. And this laminated glass fiber was sewn in the direction orthogonal to the orientation direction with the polyester thread, and the 300 g / m <2> oriented glass fiber mat was obtained.

Five sheets of the oriented glass fiber mats were stacked, and a glass fiber reinforced resin plate having a thickness of 3 to 4 mm obtained by impregnating and curing a double amount of unsaturated polyester resin twice the weight of the glass fiber was cut to prepare a large number of test pieces (A). . And about the test piece A, the tensile strength, bending strength, and bending elastic modulus of each of the horizontal direction (the orientation direction of glass fiber) and the longitudinal direction (direction orthogonal to an orientation direction) were measured, and the result is shown in the following table | surface. 1 is shown.

For the comparative example, a 300 g / m2 non-oriented glass fiber mat sewn with polyester yarn was prepared, and 5 sheets of this were piled up to impregnate and cure unsaturated polyester resin twice as large as glass fiber cores, and have a thickness of 3 to 4 mm. The glass fiber reinforced resin board was cut | disconnected, and many comparative test pieces (B) were obtained. And about this comparative test piece (B), the tensile strength, bending strength, and bending elastic modulus of a longitudinal direction and a lateral direction were similarly measured, and the result was shown in following Table 1.

In addition, the tensile strength was measured by the test method of JIS K 7113, and the bending strength and the bending elastic modulus were measured by the test method of JIS K 7171, and show the average value of the measured values of all five test pieces.

Table 1

As shown in Table 1, the non-oriented comparative test piece B does not change much in both the longitudinal direction and the transverse direction in the tensile strength, the bending strength, and the bending elastic modulus, and is slightly larger in the longitudinal direction as the sewing direction. On the other hand, the test piece (A) of the present invention in which most of the glass fibers are oriented is remarkably increased in the transverse direction in which all of the tensile strength, the bending strength, and the bending elastic modulus are in the orientation direction, and the effect of improving the strength due to the orientation is remarkably increased. Is shown. For this reason, when using the orientation glass fiber mat of this invention as a lining material of a pipe | tube, it turns out that the breakdown strength improves.

As described above, since 60% or more of the glass fibers are oriented in one direction, the oriented glass fiber mat of the present invention tends to extend in the orientation direction, and when impregnated with resin, the physical properties such as mechanical strength in the orientation direction This remarkably improves, and since the glass fibers are not separated separately, the handling is easy. In addition, the provision of the reinforcing chamber inside the mat or on the mat surface layer also shows the effect of greatly improving the tensile strength in the direction orthogonal to the orientation direction of the glass fiber.

In the manufacturing method of the present invention, in the alignment and lamination process of the glass fibers, the most of the glass fibers can be dropped onto the belt conveyor while being laminated in one direction by vibrating alignment members or mutually inverted alignment rollers. In the next step, sewing or impregnation of the binder or needle punching treatment results in an effect that the oriented glass fiber mat of the present invention can be mass produced easily and reliably.

Claims (9)

60% or more of the glass fibers laminated in a layer shape are oriented in one direction, and the laminated glass fibers are actually sewn in a direction orthogonal to the orientation direction of the glass fibers. At least 60% of the laminated glass fibers are oriented in one direction, and the laminated glass fibers are bonded to a solvent by a soluble binder. At least 60% of the laminated glass fibers are oriented in one direction, and the laminated glass fibers are entangled with the glass fibers erected by a needle punch. The orientation glass fiber mat according to any one of claims 1 to 3, wherein a plurality of reinforcing chambers in a direction orthogonal to the orientation direction of the glass fibers are provided in the mat or the mat surface layer portion. A plurality of elongated alignment members having a triangular cross-sectional shape above the belt conveyor are orthogonal to the belt conveyor in a direction perpendicular to each other so as to be spaced in parallel with each other, and the glass fibers are vibrated on the alignment member while vibrating each of the alignment members. And a step of laminating and laminating the glass fibers so as to drop the glass fibers from the mutual gap between the alignment members to the belt conveyor. Above the belt conveyor, a plurality of the alignment rollers are arranged in parallel with each other in parallel with the advancing direction of the belt conveyor, so that the direction of rotation of the alignment rollers is reversed by one interval and the direction of rotation of the alignment rollers at both ends. It is characterized in that it has an orientation and lamination process of glass fiber which feeds glass fiber on an orientation roller, rotating each orientation roller at the same time so that it may become inward, and dropping the glass fiber to a belt conveyor from the clearance gap of an orientation roller. Method for producing an oriented glass fiber mat. 7. The manufacture of the oriented glass fiber mat according to claim 5 or 6, wherein the glass fibers laminated in the orientation and lamination step of the glass fibers are sewn with threads in a direction orthogonal to the orientation direction of the glass fibers in the next step. Way. The manufacturing method of the orientation glass fiber mat of Claim 5 or 6 which impregnates the glass fiber laminated | stacked in the orientation and lamination process of glass fiber, and the binder melt | dissolved in the solvent in the next process. The method for producing an oriented glass fiber mat according to claim 5 or 6, wherein the glass fibers laminated in the glass fiber orientation and lamination step are treated with a needle punch in the next step to erect some glass fibers.