JP2011099190A - Method for producing glass chopped strand mat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To facilitate maintenance of a belt conveyer. <P>SOLUTION: The method for producing a glass chopped strand mat includes a depositing step for depositing glass chopped strands into a sheet shape, a binder spraying step for spraying a binder of a thermoplastic resin onto the glass chopped strands deposited in the depositing step, a heating step for heating and melting the binder by a heating unit while conveying the glass chopped strands onto which the binder is sprayed in the binder spraying step, into the heating unit, placing the strands on the belt conveyer for heating, and a cooling step for binding the glass chopped strands to each other, cooling the binder after the heating step, wherein the belt of the belt conveyer for heating has a mesh structure constituted of a textile of any one of carbon fibers, glass fibers, and aramid fibers. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to a method for producing a glass chopped strand mat.

  JP-A-2008-303505 is known as a technical document in such a field. In this publication, there is a method of manufacturing a glass chopped strand mat by spreading a binder on a glass chopped strand deposited in a sheet form, and then heating and melting the binder, followed by cooling and solidification to bond the glass chopped strand. Are listed. In this method of manufacturing a glass chopped strand mat, glass chopped strands are deposited on the belt of a belt conveyor, and the manufacture of the glass chopped strand mat proceeds while the glass chopped strands are conveyed by the belt conveyor.

JP 2008-303505 A

  By the way, in the manufacturing method of the above-mentioned conventional glass chopped strand mat, if the spread binder spills from the glass chopped strand and adheres to the belt of the belt conveyor, it causes a conveyance failure of the belt conveyor and the like. It is necessary to wash away the binder. However, since it is not easy to wash away the binder adhering to the belt of the conveyor, a great deal of labor is required for maintenance of the belt conveyor.

  This invention is made | formed in view of the said problem, and it aims at providing the manufacturing method of the glass chopped strand mat which can make maintenance of a belt conveyor easy.

  The glass chopped strand mat manufacturing method according to the present invention includes a deposition step of depositing glass chopped strands in a sheet form, a binder spraying step of spraying a binder of a thermoplastic resin on the glass chopped strands deposited in the deposition step, After the heating step, the glass chopped strands in which the binder is dispersed in the binder spraying step are placed on the belt of the heating belt conveyor and conveyed into the heating device, and the heating agent is heated and melted by the heating device. A cooling step of cooling the binder to bond the glass chopped strands together, and the belt of the heating belt conveyor is made of a woven fabric of any one of carbon fiber, glass fiber, and aramid fiber It has a mesh structure.

  According to the method of manufacturing a glass chopped strand mat according to the present invention, since the belt of the heating belt conveyor has a woven mesh structure, the binder adhering to the belt can be compared with a general sheet-like rubber belt. The amount can be reduced. Furthermore, since the belt is a woven fabric composed of any one of aramid fiber, carbon fiber, and glass fiber, the filaments are made narrower than the mesh of a stainless steel net (knitted fabric). It becomes possible to enlarge. Furthermore, the binder pinched | interposed into the part with which the filament was entangled can be suppressed. As a result, it is possible to make it difficult for the binder to adhere to the belt, so that the binder can be easily washed off and maintenance of the belt conveyor can be facilitated.

In the manufacturing method of the glass chopped strand mat according to the present invention, in the deposition step, after the glass chopped strand is deposited on the belt of the deposition belt conveyor, the glass chopped strand is transferred from the deposition belt conveyor to the binder conveyor belt conveyor. In the binder spraying step, it is preferable to transport the glass chopped strand from the deposition belt conveyor to the heating belt conveyor after spraying the binder onto the glass chopped strand on the belt of the binder spraying belt conveyor. .
As described above, by using different belt conveyors in the deposition process, the binder spraying process, and the heating process, it is possible to appropriately select the material of the belt according to each process.

Furthermore, it is preferable to have the water spraying process which sprays water on the glass chopped strand on the belt of the binder spraying belt conveyor before the binder spraying process.
Thus, before spraying the binder, the binder can be efficiently adhered by spraying water on the glass chopped strands on the belt of the binder conveyor belt conveyor.

In the method for producing a glass chopped strand mat according to the present invention, the belt of the deposition belt conveyor preferably has a mesh structure made of a polyester woven fabric.
In this way, the belt has a polyester mesh structure, so that the accumulated glass chopped strands stick to the belt side compared to general sheet-like rubber belts and stainless steel nets (knitted fabrics). It is possible to easily avoid the situation where the belt cannot be transported to the spreading belt conveyor.

In the method for producing a glass chopped strand mat according to the present invention, the belt of the binder spreading belt conveyor preferably has a mesh structure made of a stainless steel net (knitted fabric).
In this way, the belt has a mesh structure made of a stainless steel net, so that it is easier to wash away the binder that has fallen on the belt from the gaps of the glass chopped strands compared to a general sheet-like rubber belt. Become.

The heating belt conveyor has a plurality of drive rollers, two endless chains that are looped around the plurality of drive rollers and rotated around the drive rollers, and a plurality of links that connect the two chains in a ladder shape. It is preferable that the belt of the heating belt conveyor is wound around the plurality of connecting rods from the outside.
In this way, by using a belt conveyor with a structure in which the belt is supported by a plurality of connecting rods, it can be bent even when using a mesh structure belt that is inferior in rigidity compared to general rubber belts or stainless steel nets. And proper transport of glass chopped strands is achieved.

  According to the present invention, maintenance of the belt conveyor can be facilitated.

It is a figure which shows the glass chopped strand mat which concerns on this invention. It is explanatory drawing which shows the manufacturing process of the glass chopped strand mat which concerns on this invention.

  Hereinafter, a glass chopped strand mat and a method for producing the same according to the present invention will be described in detail with reference to the drawings.

As shown in FIGS. 1 and 2, a glass chopped strand mat 1 according to this embodiment is obtained by bonding a large number of glass chopped strands 2 deposited in a sheet shape with a binder 3 of a thermoplastic resin. The glass chopped strand mat 1 is used, for example, as a reinforcing material for automobile molded ceiling materials. Such a glass chopped strand mat 1 preferably has a mass per unit area of 30 to 150 g / m ² , and more preferably 40 to 110 g / m ² . Moreover, it is preferable that ratio of the mass of the binder 3 with respect to the glass chopped strand 2 is 5.0 to 9.5 wt%.

  The glass chopped strand 2 constituting the glass chopped strand mat 1 is formed by cutting a glass fiber bundle 5 drawn from the glass cake 4 into a predetermined length. In the present embodiment, it is preferable to use a glass chopped strand 2 having a length of 50 to 100 mm and a count of 5 to 30 tex in order to improve the tensile strength. Moreover, in order to make formation of the glass chopped strand 2 by cutting | disconnecting a glass fiber bundle easy, it is preferable that the moisture content of the glass cake 3 is 5.0 wt% or less.

  As the binder 3 for bonding the glass chopped strands 2, a powdered body of a thermoplastic resin such as an unsaturated polyester resin is used. The powder body preferably has a weight average particle diameter of 50 to 300 μm. The binder 3 is melted by heating at a temperature of 170 to 280 ° C. for 20 to 50 seconds, and then cooled to solidify and bond the glass chopped strands 2 to each other.

  Moreover, the binder 3 is spread | dispersed so that the ratio of the mass of the binder 3 with respect to the glass chopped strand 2 may become 5.0-9.5 wt% in the glass chopped strand mat 1 after manufacture. In addition, if the glass chopped strand mat 1 contains 9.5 wt% or more of the binder 3, the mat becomes too hard, the moldability is deteriorated, and uneven color and wrinkles of the molded product are likely to occur. May occur.

  Next, the manufacturing method of the glass chopped strand mat 1 which concerns on this embodiment is demonstrated.

  As shown in FIG. 2, in the manufacturing method of the glass chopped strand mat 1 which concerns on this embodiment, the glass fiber bundle 5 pulled out from the several glass cake 4 is first sent to the cutting device 10, and it cut | disconnects to predetermined length. Thus, the glass chopped strand 2 is formed. The cutting device 10 has a plurality of cutter rollers 11 and rubber rollers 12 having blades on the outer periphery, and the glass fiber bundle 5 is continuously fed by feeding the glass fiber bundle 5 between the cutter roller 11 and the rubber roller 12. Disconnect.

  The glass chopped strand 2 formed by the cutting device 10 falls on the belt 13 a of the first conveyor (deposition belt conveyor) 13 disposed below the cutting device 10. The belt 13a of the first conveyor 13 circulates at a constant speed, and the glass chopped strand 2 dropped from the cutting device 10 is deposited in a uniform sheet shape on the belt 13a (deposition step).

  The 1st conveyor 13 conveys the glass chopped strand 2 in a predetermined | prescribed conveyance direction, and has the four drive rollers 13b extended in the width direction of a conveyor. An endless roller chain 13c is stretched around each end of the drive rollers 13b so as to form a trapezoidal shape with the four drive rollers 13b as apexes. The two roller chains 13c mesh with the gear portions at both ends of the drive roller 13b. The two roller chains 13c are connected in a ladder shape by a plurality of connecting rods 13d, and an endless belt 13a is stretched from the outside of the connecting rods 13d.

  The belt 13a of the first conveyor 13 is composed of a mesh made of polyester fabric. The belt 13a preferably has a mesh thickness of 0.5 to 2 mm in diameter and a mesh size of 10 to 30 mesh, and is preferably a plain plain weave or entangled weave. Such a mesh belt 13a is inferior in rigidity as compared with a general rubber belt or the like, but the structure of supporting the belt 13a with a plurality of connecting rods 13d makes it possible to appropriately convey the glass chopped strand 2 without bending. Realized.

  In the first conveyor 13 configured as described above, when any of the driving rollers 13b is rotationally driven by a motor (not shown), the roller chain 13c circulates in a predetermined rotational direction. When the connecting rod 13d circulates together with the roller chain 13c, the belt 13a on the connecting rod 13d circulates, and the glass chopped strand 2 on the upper surface of the belt 13a is conveyed in a predetermined conveying direction.

  In the transport direction of the first conveyor 13, a second conveyor (a binder conveyor belt conveyor) 14 that is connected to the first conveyor 13 to form a transport path for the glass chopped strands 2 is disposed. The second conveyor 14 is mainly different from the first conveyor 13 only in the configuration of the belt 14a.

  The belt 14a of the second conveyor 14 is composed of a mesh body made of a stainless steel net (knitted fabric) formed by weaving stainless steel wire. The belt 14a preferably has a diameter of 1 to 5 mm in diameter in order to avoid adhesion of the binder 3 and to ensure an appropriate strength. The glass chopped strands 2 on the belt 13a of the first conveyor 13 are conveyed onto the belt 14a of the second conveyor 14 while maintaining the state of being accumulated in a sheet form.

  Above the second conveyor 14, a water spreader 15 that disperses water on the glass chopped strand 2 is disposed. The water spreader 15 spreads water uniformly on the glass chopped strands 2 deposited in a sheet shape on the belt 14a (water spreading step). Here, the water spreader 15 is such that the mass ratio of the water adhering to the glass chopped strand 2 and the glass chopped strand 2 is 30 to 90 wt% (more preferably 50 to 80 wt%). Adjust the spraying condition and spray.

  Further, a binder spreader 16 that disperses the powdery binder 3 on the glass chopped strand 2 is disposed above the second conveyor 14. The binder spreader 16 is disposed behind the water spreader 15 and uniformly spreads the binder 3 on the glass chopped strand 2 to which water has adhered (binder spreading step). Here, the binder spreader 16 spreads the binder 3 so that the mass ratio of the binder 3 to the glass chopped strand 2 in the glass chopped strand mat 1 after manufacture is 5.0 to 9.5 wt%. Adjust the amount and condition of spraying. In addition, as a shape of the binder 3, not a powder form but a fibrous form can also be used. The binder 3 formed in a fiber form is less likely to fall from the gaps between the glass chopped strands 2 and can be bonded by bonding the separated glass chopped strands 2 with a smaller mass than the powdered one. It is advantageous for improving the yield. On the other hand, when the binder is used as an emulsion rather than a solid, it is difficult to suppress the outflow from the gaps of the glass chopped strands 2.

  In the conveying direction of the second conveyor 14, a third conveyor (heating belt conveyor) 17 that is connected to the second conveyor 14 and forms a conveying path for the glass chopped strand 2 is disposed. The third conveyor 17 is mainly different from the first conveyor 13 only in the configuration of the belt 17a. And like the 1st conveyor 13, the 3rd conveyor 17 has the four drive rollers 17b extended in the width direction of a conveyor. Endless roller chains 17c are looped around one end of each of these drive rollers 17b so as to form a trapezoidal shape with the four drive rollers 17b as apexes. The two roller chains 17c mesh with the gear portions at both ends of the drive roller 17b. The two roller chains 17c are connected in a ladder shape by a plurality of connecting rods 17d, and an endless belt 17a is stretched from the outside of the connecting rods 17d.

  The belt 17a of the third conveyor 17 is composed of a mesh made of a woven fabric woven with heat resistant fibers. As the heat resistant fiber, a clear plain weave or woven fabric of aramid fiber, carbon fiber, or glass fiber is used. In the belt 17a, in order to avoid adhesion of the binder 3, it is better that the thickness of the filaments constituting the mesh is narrow and the eyes are large. Specifically, the diameter of the filaments is 0.5 to 2 mm in diameter. The yarn density is preferably 3 to 6 yarns / 25 mm in both the warp and weft directions. The glass chopped strands 2 and the binder 3 on the belt 14a of the second conveyor 14 are conveyed onto the belt 17a of the third conveyor 17 while maintaining a state of being dispersed in a sheet form.

  A heating device 18 for heating the binder 3 is disposed in the middle of the third conveyor 17. The heating device 18 heats the glass chopped strand 2 and the binder 3 conveyed by the third conveyor 17 at a temperature of 170 to 280 ° C. for 20 to 50 seconds (heating step). By this heating, the binder 3 attached to the glass chopped strands 2 is melted and enters a portion where the glass chopped strands 2 are in contact with each other.

  In the conveying direction of the third conveyor 17, a pair of upper and lower water-cooled rollers 19 that draws the glass chopped strand 2 and the binder 3 on 17 a are arranged. The water-cooling roller 19 has cooling water circulating therein, and cools the glass chopped strand 2 and the binder 3 while pressing them in a mat shape (cooling step). By this cooling, the binder 3 in a molten state is solidified and the glass chopped strands 2 are bonded to each other, and the glass chopped strand mat 1 is manufactured. The water-cooled roller 19 feeds the manufactured glass chopped strand mat 1 toward the winder 20, and the glass chopped strand mat 1 is wound up by the winder 20 to obtain the mat roll 21.

In the manufacturing method of the glass chopped strand mat according to the present embodiment described above,
By appropriately setting the specifications and deposition amount of the glass chopped strand 2, the type of the binder 3, the spraying amount of water and the binder, the temperature of heating and cooling, the mass per unit area is 30 to 150 g / m ² A glass chopped strand mat 1 can be manufactured.

  According to the method for manufacturing a glass chopped strand mat according to the present embodiment, before the binder 3 is sprayed, the binder 3 is easily adhered to the glass chopped strand 2 by spraying water onto the glass chopped strand 2 in advance. can do. As a result, since the binder 3 is prevented from spilling from the gaps between the glass chopped strands 2, the consumption of the binder 3 can be reduced. Moreover, since the sprayed water tends to accumulate at the site where the glass chopped strands 2 are in contact with each other due to surface tension, the binder 3 is also likely to adhere to the site where the glass chopped strands 2 are in contact with each other. This improves the efficiency of bonding by the binder 3 and makes it possible to obtain a glass chopped strand mat 1 having a sufficient strength with a small amount of the binder 3, and as a result, in the production of the glass chopped strand mat 1. The basic unit can be improved and the yield can be improved.

  Furthermore, since the water sprayed on the glass chopped strand 2 wraps around the glass chopped strand 2 to the back side (belt side) during conveyance, the binder 3 also wraps around the back side as the water moves. Thereby, since the uniform bonding is performed in the deposition direction of the glass chopped strand 2 (the thickness direction in the glass chopped strand mat 1), the tensile strength of the mat can be improved. For uniform bonding in the thickness direction, a powdery binder is preferable to a fibrous binder.

  Further, by suppressing the binder 3 from spilling through the gaps between the glass chopped strands 2, the ratio of the binder 3 adhering to the conveyor or the like can be reduced. As a result, the binder 3 adhering to the conveyor or the like is conveyed. The possibility of causing a defect or the like can be reduced.

  Here, also in the manufacturing method of the glass chopped strand mat according to the present embodiment, part of the spread binder 3 and the melted binder 3 spills from the glass chopped strand 2 and falls onto the conveyor belt. In order to adhere, it is necessary to wash off the binder 3 from the belt.

  In the manufacturing method of the glass chopped strand mat according to the present embodiment, the belt 14a of the second conveyor 14 is a stainless steel net (knitted fabric), and therefore falls on the belt 14a as compared with a general sheet-like rubber belt. It becomes easy to wash off the powdery binder 3 and can be efficiently removed by washing with a brush or the like. Further, the driving roller 14b on the lower side of the second conveyor 14 is not a cylindrical roller but a roller having a gear portion that meshes with the roller chain 13c, so that the binder 3 can be used as the belt 14a and the driving roller 14b. It is possible to suppress the occurrence of conveyance failure due to being sandwiched between the two.

  Further, since the belt 17a of the third conveyor 17 has a mesh structure, the amount of the binder 3 adhering to the belt 17a can be reduced as compared with the case of a general rubber belt. Easy to wash off. Furthermore, the belt 17a is made of aramid fiber, carbon fiber, or glass fiber woven fabric, so that it is possible to narrow the filaments and make the mesh larger than that of the stainless steel net. The agent 3 can be made difficult to adhere. Further, since the belt 17a of the third conveyor 17 is stretched around the outside of the connecting rod 17d, it does not require so much strength for conveyance, so that the thickness of the yarn can be further reduced and the degree of visibility is increased. Can be further increased. Thereby, adhesion of binder 3 can be controlled further. In addition, since the wire material forms a mesh structure made of woven fabric without crossing in the thickness direction at the crossing point compared to the stainless steel net, it is possible to prevent the binder 3 from entering the crossing point, The binder 3 can be efficiently washed away by washing with water. In addition, since thermal expansion and elongation are less than that of a stainless steel net, there is almost no need for adjustment of tension by heating, and maintenance is easy.

  Further, since the belt 13a of the first conveyor 13 has a polyester mesh structure, the accumulated glass chopped strand 2 is stuck to the belt 13a side as compared with a general sheet-like rubber belt, It is possible to easily avoid a situation where the conveyor 14 cannot be conveyed. Similarly, the belt 14a of the second conveyor 14 has a stainless steel net structure, so that it is easy to avoid a situation in which the accumulated glass chopped strand 2 sticks to the belt 14a side and cannot be conveyed to the third conveyor 17. can do.

  It goes without saying that the present invention is not limited to the embodiment described above. For example, the water spraying on the glass chopped strands 2 may be performed almost simultaneously with the deposition of the glass chopped strands 2 on the first conveyor 13. Further, the water spreader 15 may be configured to spray from below instead of from above the belt.

If the belt 13a and the belt 14a can be tensioned to such an extent that they do not bend, the belt is directly stretched around the drive roller, so that the first conveyor 13 and the second conveyor 14 The structure can be simplified. Further, an air suction device for depositing the falling glass chopped strand 2 toward the belt 13 a to deposit it in a sheet shape may be provided in the first conveyor 13.

  Each conveyor may be subjected to silicon treatment or Teflon treatment (Teflon is a registered trademark) in order to enhance the peelability of the glass chopped strands 2 and the binder 3 and prepare for cleaning.

  Moreover, the aspect which manufactures the glass chopped strand mat 1 with one conveyor may be sufficient, without dividing a conveyor into three units | sets. In this case, it is preferable that the belt of a conveyor is comprised from the mesh which consists of a woven fabric of an aramid fiber, carbon fiber, or glass fiber.

  Hereinafter, the Example of the manufacturing method of the glass chopped strand mat based on this invention is described.

Example 1
In Example 1, the amount of the glass chopped strand 2 deposited so that the mass per unit area becomes 100 g / m ² using the equipment described in the method for manufacturing the glass chopped strand mat according to the embodiment shown in FIG. Adjusted. In addition, the polyester fiber fabric as the first belt, the stainless steel net (knitted fabric) as the second belt, the aramid fiber fabric as the third belt, and the water adhering to the glass chopped strand 2 after water spraying Water was sprayed so that the mass ratio with the glass chopped strand 2 was 70 wt%. Further, the binder was sprayed by adjusting the spraying amount and spraying state so that the mass ratio of the binder 3 to the glass chopped strand 2 was 9 wt%. The heating temperature in the heating device 18 was set to 220 ° C., and the heating time was set to 40 seconds. The glass chopped strand mat was manufactured under the above conditions.

(Example 2)
In Example 2, the same conditions as in Example 1 were applied except that the binder was sprayed by adjusting the spraying amount and spraying state so that the mass ratio of the binder 3 to the glass chopped strand 2 was 15 wt%. A glass chopped strand mat was produced.

(Example 3)
In Example 3, a glass chopped strand mat having a mass per unit area of 100 g / m ² was produced under the same conditions as in Example 1 except that water was not sprayed.

Table 1 shows the implementation conditions of the above Examples 1 to 3 and the evaluation of the produced glass chopped strand mat. In addition, the binder usage-amount ratio shown in Table 1 is based on the usage-amount of the binder 3 used in Example 3 in order to manufacture the glass chopped strand mat whose mass per unit area is 100 g / m < ² >. Represents the amount of binder used in Examples 1 and 2.

  As shown in Table 1, in Example 1, the binder usage ratio was greatly reduced as compared with Example 3. Furthermore, the stain | pollution | contamination of the conveyor was also suppressed and the tensile strength of the manufactured glass chopped strand mat also increased compared with Example 3. As Comparative Example 1, a glass chopped strand mat was manufactured under the same conditions as in Example 1 except that the stainless steel net (knitted fabric) used as the second belt in Example 1 was used as the third belt. Went. The amount of binder used was 50, which was slightly larger than that of Example 1, but the physical properties of the glass chopped strand of Comparative Example 1 were almost the same as those of Example 1. However, in order to remove the dirt on the conveyor, the washing brush has to be strongly applied to the conveyor, and the third conveyor has to be frequently adjusted for tension.

  From this result, it can be seen that the amount of the binder 3 used is greatly reduced by pre-spreading the glass chopped strand 2 with water, and the yield of the binder 3 is greatly improved. In addition to reducing the amount of the binder 3 used, it is considered that the binder 3 is prevented from spilling from the gaps between the glass chopped strands 2, and the contamination of the conveyor is reduced. Furthermore, since the tensile strength of the glass chopped strand mat has increased despite the greatly reduced amount of binder 3 used, the efficiency of bonding between the glass chopped strands 2 is greatly improved by spraying water. I understand that.

  In Example 2, the binder usage ratio decreased compared to Example 3, but the binder usage ratio increased from Example 1 by the amount of increased binder content. Further, although not as much as in Example 1, the conveyor was less soiled than Example 3. Moreover, the tensile strength of the glass chopped strand mat increased as the binder content was increased as compared with Example 1. However, from the viewpoint of the flexibility of the glass chopped strand mat, the quality was lower than those of Examples 1 and 3.

From this result, it can be seen that in a glass chopped strand mat having a mass per unit area of 100 g / m ² , the binder content is preferably 9 wt% instead of 15 wt% from the viewpoint of flexibility.

  DESCRIPTION OF SYMBOLS 1 ... Glass chopped strand mat, 2 ... Glass chopped strand, 3 ... Binder, 4 ... Glass cake, 10 ... Cutting device, 13 ... First conveyor (deposition belt conveyor), 13a, 14a, 17a ... Belt, 14 ... second conveyor (binder conveyor for spreading the binder), 15 ... water spreader, 16 ... binder spreader, 17 ... third conveyor (belt conveyor for heating), 18 ... heating device, 19 ... water cooling roller, 20: Winder.

Claims (6)

A deposition step of depositing glass chopped strands in sheet form;
A binder spraying step of spraying a thermoplastic resin binder on the glass chopped strands deposited in the deposition step;
A heating step in which the glass chopped strands in which the binder is dispersed in the binder spraying step are placed on a belt of a heating belt conveyor and conveyed into a heating device, and the binder is heated and melted by the heating device; ,
A cooling step of cooling the binder and bonding the glass chopped strands after the heating step,
The method of manufacturing a glass chopped strand mat, wherein the belt of the heating belt conveyor has a mesh structure composed of a woven fabric of any one of carbon fiber, glass fiber, and aramid fiber. In the deposition step, after the glass chopped strands are deposited on the belt of the deposition belt conveyor, the glass chopped strands are conveyed from the deposition belt conveyor to the binder conveyor belt conveyor,
In the binder spraying step, after the binder is sprayed on the glass chopped strands on the belt of the binder spraying belt conveyor, the glass chopped strands are conveyed from the deposition belt conveyor to the heating belt conveyor. The manufacturing method of the glass chopped strand mat of Claim 1 characterized by these.   3. The glass chopped strand mat according to claim 2, further comprising a water spraying step of spraying water on the glass chopped strands on a belt of the binder spraying belt conveyor before the binder spraying step. Manufacturing method.   The method of manufacturing a glass chopped strand mat according to claim 2 or 3, wherein the belt of the deposition belt conveyor has a mesh structure made of a polyester woven fabric.   The method of manufacturing a glass chopped strand mat according to any one of claims 2 to 4, wherein a belt of the belt belt for spreading the binder has a mesh structure made of a net made of stainless steel.   The heating belt conveyor includes a plurality of driving rollers, two endless chains that are looped around the driving rollers and rotated around the driving rollers, and the two chains are connected in a ladder shape. 6. The belt according to claim 1, wherein the belt of the heating belt conveyor is wound around the plurality of connecting rods from the outside. The manufacturing method of the glass chopped strand mat of description.

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