JPH04191516A - Method of making fiber roll - Google Patents

Abstract

PURPOSE:To enhance form retension, surface hardness and yield by winding nonwoven fabrics in belt form, composed of fibers of mutually different melting points, around a roll core shaft in the direction perpendicular to the shaft axis, and compressing and heating, thereby forming a fiber roll in bonding the fibers. CONSTITUTION:Nonwoven fabric 2 in belt form composed of plural kinds of fibers with mutually different melting points, is used as nonwoven fabric 2 for forming a surface layer of a fiber roll. This is wound around a core shaft 1 of a roll in a direction perpendicular to the shaft axis and then compressed and heated, thereby plasitcizing the fiber of a lower melting point to heat-bond the fibers constituting the nonwoven fabric. As a combination of fibers having mutually different melting points, there are available the following, for example, polyamide fiber and polyester fiber, and polyethylene fiber and polypropylene fiber. Accordingly, it is excellent in form retention, durability and nonwoven fabric yield. Further, by making wedge-like notches on the inner periphery of the nonwoven fabric 2, no wrinckles can be produces but the overall winding can be in uniform density so that high surface hardness is attained.

Description

Detailed Description of the Invention (Industrial Field of Application) The present invention is a method of forming a roll surface using a fibrous material, particularly a non-woven material, which is used for squeezing, draining, nipping, conveying guides, etc. of sheet-like objects or linear objects. The present invention relates to a method of manufacturing a fiber roll formed by.

(Prior technology) Currently used fiber rolls are made by cutting out nonwoven fabric into disk shapes and stacking them in the direction of the core axis of the roll.The core axis of the roll is inserted into the center of the roll, and the peripheral edge of the disk is placed on the surface of the roll. It is manufactured to form. However, such a method of manufacturing a fiber roll has a poor yield when cutting out the nonwoven fabric, causing an increase in costs.

In addition, in Japanese Patent Publication No. 51-17142, there is a tape-like (
A drawing roll made by winding a nonwoven fabric cut into strips in a spiral around the core shaft of the roll was published in Japanese Patent Publication No. 52-1714.
Publication No. 3 discloses a manufacturing method thereof.

The manufacturing method for this squeezing roll involves coating one side of a nonwoven fabric or other cloth tape with an adhesive, and pressing a tooth profile on the area where the cloth tape contacts the roll to create an uneven pressed shape (wedge-shaped pressed shape). are wound in a spiral shape directly parallel to the core axis of the roll.

However, with this method of producing squeeze rolls, the nonwoven fabric is not fixed in the shape of being wrapped around the roll, so it has poor shape retention under harsh usage conditions, and the part near the core axis is pressed into shape. Therefore, the density of the nonwoven fabric becomes high. For this reason, the density of the nonwoven fabric at the surface portion is lower than that at the core portion of the roll, making it difficult to obtain the necessary surface hardness. In addition, when absorbing or supplying liquid using a hollow core shaft, the coated adhesive can be applied to the liquid absorbent provided on the core shaft of the roll.
Alternatively, there is a problem that the hole for liquid supply is blocked.

(Problems to be Solved by the Invention) ``Therefore, the present inventor developed a fiber that retains its shape even under harsh conditions, has high surface hardness, and improves the yield of nonwoven fabrics and the workability of manufacturing. This invention was developed for the purpose of manufacturing rolls, and the present invention was completed.

(Means for Solving the Problems) A feature of the method for manufacturing a fiber roll according to the present invention to achieve the above object is that first, a nonwoven fabric is cut into strips, and the fabric rolls are cut in the circumferential direction of the core axis of the roll. It is to wind the material to form a roll surface. Next, the nonwoven fabric is formed into a shape wound around a roll, and the fibers that make up the nonwoven fabric are bonded to each other to stably maintain the shape.

Specifically, there is a method in which the nonwoven fabric is directly wrapped around the core shaft of a roll and shaped, and a method in which the nonwoven fabric is then wrapped around another shaft-like object to form a cylindrical shape.
Alternatively, a method is provided in which a flange-shaped nonwoven fabric block is preformed, a core shaft of a roll is inserted into this nonwoven fabric block, and the required number of blocks are laminated to form a fiber roll.

Furthermore, when a band-shaped nonwoven fabric is wrapped around the core shaft of the roll,
Since wrinkles and the like occur due to the difference in the length of the inner and outer circumferential surfaces, a method is also provided in which a part of the surface on the inner circumferential side of the nonwoven fabric is cut out in advance.

That is, the present invention, as the first invention, involves the following steps: first, a band-shaped nonwoven fabric made of a plurality of fibers having different melting points is wound around a core shaft of a roll in a direction perpendicular to the shaft, and then the nonwoven fabric is compressed; Provided is a method for manufacturing a fiber roll, characterized in that the fiber roll is formed into a fiber roll by heating, and the fibers constituting the nonwoven fabric are bonded to each other; Provided is a method for producing a fiber roll, characterized in that the strip-shaped nonwoven fabric is a strip-shaped nonwoven fabric made of fibers that have a melting point and fibers that do not have a melting point; In the method for manufacturing a fiber roll according to the first invention, the fiber roll is characterized in that the strip-shaped nonwoven fabric is a strip-shaped nonwoven fabric containing composite fibers made of a plurality of polymers having different melting points or mixed fibers. Provides a manufacturing method.

By the way, in the method of manufacturing a fiber roll according to the first, second or third invention, the nonwoven fabric is directly wound around the core shaft of the roll, but instead of this, the nonwoven fabric is first wound around another shaft-shaped object. , a method of producing a cylindrical or brim-shaped nonwoven fabric block, and laminating the nonwoven fabric blocks to make a fiber roll, that is, as a fourth invention, the method is the same as that used in the first, second, or third invention. The same nonwoven fabric was first wound around a shaft for preforming in a direction perpendicular to the shaft, and the wound nonwoven fabric was heated or compressed and heated to preliminarily bond the fibers constituting the nonwoven fabric. After that, the pre-bonded non-woven fabric is removed from the pre-forming shaft to form a cylindrical or brim-shaped non-woven fabric block, and then the length necessary to obtain the required fiber roll surface length is removed. A number of the above-mentioned nonwoven fabric blocks are laminated in the core axis direction,
The core shaft of the roll is inserted into the center core, and the laminated nonwoven fabric blocks are compressed or compressed and heated to form a fiber roll, and the fibers constituting the nonwoven fabric are bonded to each other. A method for manufacturing a fiber roll is provided.

The above-described invention is characterized in that the fibers constituting the nonwoven fabric contain a heat-sealing substance in advance, but in addition, a normal nonwoven fabric is used and a bonding agent is added during the manufacturing process.
provide a way to provide

That is, as a fifth invention, the nonwoven fabric block according to the fourth invention wraps a band-shaped nonwoven fabric around a shaft-shaped object for preforming in a direction perpendicular to the shaft,
Adding a bonding agent that bonds the fibers constituting the nonwoven fabric to each other, or after winding a band-shaped nonwoven fabric around a preforming shaft in a direction perpendicular to the shaft, adding the above bonding agent to the nonwoven fabric. The fibers constituting the nonwoven fabric are preliminarily bonded, and the preliminarily bonded nonwoven fabric is removed from the preforming shaft to form a cylindrical or brim-shaped nonwoven fabric block. A method for manufacturing a fiber roll is provided.

Further, as a sixth invention, in the method for manufacturing each fiber roll according to the first invention to the fifth invention, the inner part of the belt-shaped nonwoven fabric is To provide a method for manufacturing a fiber roll, characterized in that at least one notch is made per circumference of the core axis of the roll, on the surface that becomes the circumferential side, toward the surface that becomes the outer circumferential side (Function) Hereinafter, the above-mentioned method will be described. The contents of the present invention will be explained in more detail, and its meaning and operation will be explained one by one. First, the first and second inventions will be explained, but the explanation of terms and other contents also apply to the following inventions.

In the method for manufacturing a fiber roll according to the first or second invention, a plurality of types of fibers having different melting points, or fibers having a melting point and fibers having no melting point are added to the nonwoven fabric forming the surface layer of the fiber roll. A band-shaped nonwoven fabric made of The fibers that make up the nonwoven fabric are plasticized and the fibers that make up the nonwoven fabric are thermally fused together to act as a binder.

Examples of fibers having a melting point include fibers spun from thermoplastic polymers, such as polyamide fibers, polyester fibers, and polyolefin fibers. Examples of fibers that do not have a melting point include rayon fibers, polyacrylonitrile fibers, natural fibers, and inorganic fibers.

Combinations of multiple fibers with different melting points include, for example, polyamide fibers and polyester fibers, polyethylene fibers and polypropylene fibers, and at least two fibers with different melting points.
Examples include various types of polyamide fibers. Examples of combinations of fibers that have a melting point and fibers that do not have a melting point include polypropylene fibers and polyacrylonitrile fibers, and polyamide fibers and rayon fibers.

Bonding refers to a process in which individual fibers are partially bonded, and in the present invention, it is not necessary that all of the fibers that make up the nonwoven fabric are bonded; It is sufficient if it can maintain the shape wound around the core shaft of the roll.

In the present invention, the nonwoven fabric used may be partially bonded in advance as long as it can be easily wound around the core shaft of the roll. In particular, even if the fiber is pre-bonded with a fiber with a low melting point, if it is formed into a fiber reel, compressed and heated, it will be re-bonded in that shape.
There are no particular problems and it can be used in the present invention. It may have the advantage of making it easier to process nonwoven fabrics.

Band-shaped nonwoven fabrics are used without waste, both when cutting from a raw fabric and when wrapping around the core shaft of a roll in the circumferential direction. The cross section of the nonwoven fabric in the lateral direction is preferably a rectangle including a square in order to bring the nonwoven fabrics into close contact with the nonwoven fabrics wound next to each other. There are no particular limitations on the width, thickness, or length of the nonwoven fabric.

Wrapping involves wrapping around the core axis of the roll in a direction perpendicular to the axis, that is, in the circumferential direction, but its meaning is not strict, and means that it is not parallel to or close to the axis.

The winding method may be any method and is not particularly limited.

For example, a method in which a flange-shaped block is formed by wrapping the core shaft of a roll once or several times in the axial direction, and multiple flange-shaped blocks are arranged in close contact with each other in the axial direction; There are methods such as winding it in a spiral. Alternatively, one or more strip-shaped nonwoven fabrics may be arranged in parallel and wound at the same time. The number of turns in the radial direction of the roll is not limited to a single layer, but may be stacked in the diametrical direction.

Next, a known method may be used for compressing and heating. For example, the nonwoven fabric is wound around the core shaft of a roll, the nonwoven fabric is compressed with a press, and the nonwoven fabric is heated as it is. Examples include a method in which the temperature is raised to a temperature at which wear occurs and then the temperature is lowered, and a method in which a nonwoven fabric is wrapped and compressed, and then heated after being wrapped. Alternatively, a simple method is to insert a disc-shaped backing plate into one end of the shaft in advance to regulate the side surface of the nonwoven fabric to be wrapped, and after wrapping the nonwoven fabric, insert a similarly shaped backing plate from the other end. However, there is a method of compressing the nonwoven fabric in the axial direction using two backing plates.

In the present invention, the compression and heating procedures may be performed either first, and may be selected depending on the conditions at that time.

Compression increases the rolled nonwoven fabric to the required density.
In addition to being formed as the surface of a fiber roll, it also has the effect of facilitating bonding between fibers.

The mainly low-melting point fibers that make up the nonwoven fabric, or the composite fibers described later, or the low-melting point polymers of the mixed fibers, are plasticized by heating, causing the fibers to be thermally fused to each other, and then compressed. Combined with this effect, it bonds the fibers.

Next, the third invention will be explained.

= 14- In the third invention, the composite fibers or mixed fibers contained in the nonwoven fabric used are fibers made of two or more types of polymers with different melting points, and their cross-sectional shape is not particularly limited. Examples of composite fibers include composite fibers with a core-sheath cross section of polypropylene and polyethylene, bimetal type composite fibers made of two types of polyamides with different melting points, and composite fibers with a sea-island structure of polystyrene and polyester. In this case, the polymer with the lower melting point is mainly plasticized and thermally fused by heating, and has the effect of bonding the fibers to each other.

The proportion of composite fibers or mixed fibers that make up the nonwoven fabric is
It is not particularly limited as long as it is sufficient to form a bond, and may be 100%.

The fourth invention will be explained.

In the manufacturing method according to the fourth invention, first, the same nonwoven fabric used in the first, second, ', or third invention is wound around a separately prepared shaft-like object for preforming, and heated or compressed. - After heating and preliminarily bonding the fibers constituting the nonwoven fabric, it is removed from the shaft-like object and immediately formed into a nonwoven fabric block.

It is desirable that the outer diameter of the shaft-like material used be approximately equal to and larger than the outer diameter of the core shaft of the roll, but it is also possible to use a plurality of nonwoven fabric blocks stacked in the axial direction.
It is not necessary that the axial lengths be equal.

Moreover, preliminary bonding means a bonding state of an intermediate shape, including a shape close to the final shape of the nonwoven fabric. That is, the fibers or polymers having a bonding function according to the present invention can be reshaped into the final shape by heating again, and can maintain the shape of the fiber roll.

The nonwoven fabric block removed from the shaft-like object has a cylindrical shape or a flange shape.

Insert the core shaft of the roll into the center of the nonwoven fabric block produced in this way, and insert the necessary number of nonwoven fabrics in the axial direction so that the total length of the nonwoven fabric block becomes the predetermined roll surface length in the axial direction. Stack the blocks. However, the meaning of the necessary number includes the case of one. In other words, the term "lamination" includes the case of one layer. This is the case when the surface of the roll can be formed from - nonwoven blocks. The procedure for inserting the core shaft of the roll and laminating the nonwoven fabric blocks is as follows.
Whichever comes first is fine.

In this way, the nonwoven fabric block mounted on the core shaft of the roll is compressed, or compressed and heated, thereby bonding the fibers of the nonwoven fabric block to each other to form a fiber roll. There is no particular restriction on the stage at which the roll surface length is adjusted, and it may be determined based on process considerations.

FIG. 2 is a front view including a partial axial cross section, showing an example of a fiber roll manufactured by the method for manufacturing a fiber roll according to the fourth invention, in which 1 is a core axis of the roll, 9 is a flange; The dotted lines indicate the laminated state of each nonwoven fabric block.

Although this method increases the number of man-hours, it is a practical method suitable for manufacturing a fiber roll that is uniform throughout and has high precision. Furthermore, a fifth invention will be explained.

In the fifth invention, instead of pre-containing the bonding substance in the nonwoven fabric as in the above-mentioned inventions, a normal nonwoven fabric is used, and the winding around the shaft-like object for preforming is performed in a step. Alternatively, after winding, a bonding agent is applied and preliminary bonding is performed to prepare a nonwoven fabric block.

The purpose of applying a bonding agent is to bond the fibers that make up the nonwoven fabric, so simply coating the surface of the nonwoven fabric is not enough.
It has to penetrate inside. Specifically, methods such as impregnating a nonwoven fabric with a bonding agent, or preparing a bonding agent with low viscosity, and efficiently permeating the bonding agent into the interior by spraying are employed.

The bonding agent may be of any type, such as a solvent type, an emulsion type, or a hot melt type, as long as it can penetrate the polymer into the inside of the nonwoven fabric. After infiltration, the fibers are bonded, if necessary, by evaporating the solvent or by breaking the emulsion to solidify the polymer.

The nonwoven fabric block is manufactured into a fiber roll in the same manner as in the fourth invention.

Furthermore, the sixth invention will be explained.

In each of the above inventions, if a band-shaped nonwoven fabric is wound around the core shaft of a roll in the circumferential direction, wrinkles occur due to the difference in length between the inner and outer peripheral surfaces of the nonwoven fabric, and uneven density differences occur in the nonwoven fabric. I don't like it. This is especially noticeable when the density is high.

Therefore, in the sixth aspect of the invention, at least one notch is made in the inner circumferential surface of the nonwoven fabric toward the outer circumferential surface for each circumference of the core axis of the roll.

The notch is to cut out a part of the nonwoven fabric, and when the nonwoven fabric is wound around the core shaft of a roll, it reduces the difference in length between the inner and outer peripheral surfaces of the nonwoven fabric, and eliminates the aforementioned undesirable wrinkles and density difference. It has the effect of preventing the occurrence of.

Therefore, it is preferable that the cross-sectional shape of the notch in the direction perpendicular to the axis is concave, particularly wedge-shaped. The number and dimensions of these notches are determined depending on the outer diameter of the core shaft and the outer diameter of the roll. Here, the inner peripheral side refers to the side that is close to the core axis of the roll when the nonwoven fabric is wound around the core axis of the roll.

This method does not cause density differences, unlike the conventional method of creating wedge-shaped irregularities using a pressing die, and fiber rolls manufactured in this way can easily obtain high surface hardness. There is a characteristic that

Each of the inventions has been explained above, but in addition to this, in order to fix the wound nonwoven fabric on the core shaft of the roll, a concave or convex strip is provided in the axial direction, and a concave or convex strip is provided on the surface of the nonwoven fabric in contact with the strip so as to fit therewith. It is also possible to insert a shaped or concave cutout and fit the two together.

Furthermore, a stopper or the like for fixing the end of the nonwoven fabric may be provided on the core shaft of the roll.

(Example) FIG. 1 is a perspective view showing an example of an embodiment of the present invention.

This embodiment will be explained based on FIG.

A strip-shaped nonwoven fabric 2 is being wound around the core shaft 1 of a roll in a direction perpendicular to the shaft. Wedge-shaped notches 5 are pre-inserted in the inner surface 3 of the nonwoven fabric 2 at predetermined intervals toward the outer surface 4. A convex strip 7 is provided in the axial direction on the core shaft of the roll, a concave notch 6 is made in the nonwoven fabric 2 in contact with the strip, and the two are fitted together. 8 is a backing plate for regulating and compressing the end surface of the nonwoven fabric 2.

Next, in order to make the present invention easier to understand, examples of the present invention will be described.

Example 1 Polyamide fiber (nylon 6) with 3 denier, fiber length 51 mm, number of crimps 15 per inch, melting point approximately 215°C
and a polyamide fiber of the same form with a melting point of about 130°C.
: Blend the cotton at a ratio of 1:1 and use a needle punch machine to obtain a material with a thickness of approximately 2.5 mm, a width of 1000 mm, and a basis weight of approximately 200 g/m2.
made a non-woven fabric.

= 21- This nonwoven fabric was cut into a width of 37.5 mm in the longitudinal direction to obtain a band-shaped nonwoven fabric with a rectangular cross section of 37.5 x 2.5' mm. In order to fix the nonwoven fabric to the axis of the roll, cut concave notches with a width of 12 mm and a depth of about 5 mm on one side of this strip-shaped nonwoven fabric so that the center spacing was about 92 mm in the longitudinal direction. I inserted it along the entire length.

This belt-shaped nonwoven fabric has a diameter of 1 with the notch on the inner circumferential side.
In the circumferential direction of the core axis of a roll of 75mm and length 8oOmm,
The nonwoven fabric was wrapped around one circumference in a brim shape, the nonwoven fabric was cut, and both end surfaces of the wrapped nonwoven fabric were joined.

Note that a disc-shaped backing plate was inserted in advance at a position 100 mm from one end of the core axis of this roll to restrict the winding of the nonwoven fabric on the side surface. On the surface of the core shaft, six protrusions with a width of 12 mm and a height of 5 mm are provided in the axial direction at equal intervals in the circumferential direction, and when winding, the protrusions are fitted into the notches of the nonwoven fabric. The nonwoven fabric was fixed.

In the same manner, the nonwoven fabric was wrapped in a brim shape and laminated in the axial direction. After laminating and wrapping the nonwoven fabrics, a patch plate of the same shape was inserted on the opposite side to where the patch plate had been inserted previously.

This material was compressed to an apparent density of approximately 0.8, and the length of the roll surface was 6.00 mm. After being further compressed, it was inserted into a constant temperature oven at about 150°C for about 20 minutes, then taken out from the oven and allowed to cool naturally, and the nonwoven fabric part was fixed in the compressed shape by thermal fusion of the polyamide fibers on the low melting point side, and a patch plate was formed. I removed it.

The surface of this fiber roll was ground to produce a fiber roll with a diameter of 250 mm.

A pair of fiber rolls finished in this way was used as a drainer roll for the pre-drying treatment of textiles, but compared to conventional fiber rolls made by cutting out disc-shaped polyamide fiber non-woven fabrics, the basic unit of non-woven fabric The results showed that the roll life was significantly improved by about half, and the life of the roll was extended by about 20%.

Example 2 Rayon fibers of 3 denier, fiber length 38 mm and polyethylene fibers of 2 denier, fiber length 38 mm, melting point 130°C were mixed in a ratio of 8:2, = 23- with a needle punch machine, the thickness was Approximately 2.2mm.

A nonwoven fabric with a width of 1200 mrrB and a basis weight of approximately 250 g/m2 was made.

This nonwoven fabric was cut in the longitudinal direction to a width of 100 mm to obtain a band-shaped nonwoven fabric with a rectangular cross section of 100 x 2.2 mm.

A notch was made in this nonwoven fabric as in Example 1.

The above band-shaped nonwoven fabric was wound around the core shaft of a hollow roll with a diameter of 175 mm and a length of 800 mm in the same manner as in Example 1, a patch plate was inserted, the nonwoven fabric was fixed, and the fabric was laminated in the axial direction. The length of the roll surface was set to 600 mm. On the other hand, a large number of small holes penetrating from the hollow portion to the surface were previously bored in the core shaft of the wound roll.

The apparent density of this material is approximately 0. 6, and while still compressed, it was inserted into a constant temperature oven at about 150℃ for about 30 minutes, then taken out from the oven and allowed to cool naturally.The rayon fibers were bonded to each other by heat fusion of the polyethylene fibers, and the shape of the roll was changed. Fixed.

The surface of this fiber roll was ground to obtain a fiber roll with a diameter of 195 mm and a length of 600 mm on a 10-round surface.

The hollow portion of one of the pair of fiber rolls thus finished was connected to a vacuum pump and used as a dewatering roll to remove water adhering to the surface of the metal sheet.

Compared to the fiber roll manufactured by the conventional manufacturing method, the basic unit of the nonwoven fabric was improved as in Example 1, and the life of the roll was approximately 30% longer.

Example 3 A 6-denier core-sheath composite fiber with a volume ratio of 50:50, consisting of polypropylene on the core side and polyethylene on the sheath side, was cut to a fiber length of 64 mm, and then cut to a width of 1.5 mm using a needle punch machine. A nonwoven fabric with a size of 200 mm, a thickness of 4.5 mm, and a basis weight of 200 g/m2 was produced.

This nonwoven fabric was cut in the longitudinal direction to a width of 100 mm to obtain a band-shaped nonwoven fabric with a rectangular cross section of 100 x 4.5 mm.

In order to fix the nonwoven fabric to the axis of the roll, concave notches with a width of 15 mm and a depth of about 5 mm were inserted from one side of this strip-shaped nonwoven fabric so that the center spacing was about 262 mm in the longitudinal direction. .

Furthermore, the height is 60mm at equal intervals between these notches.
A wedge-shaped notch with a base of 50 mm was inserted.

This nonwoven fabric was spirally wound 60 times in the axial direction around a preforming shaft having a diameter of 500 mm and a length of 300 mm so that the surface with the above-mentioned notch was on the inner peripheral side. Furthermore, the diameter from each end of the shaft is 750 m.
A disk-shaped caul plate of size m was inserted and fixed by pushing it in until the distance between the two caul plates became 45 mm.

This product was inserted as it was into a constant temperature furnace at 140°C, held for about 20 minutes, then taken out from the constant temperature furnace, the patch plate and preforming shaft were removed, and the polyethylene sheath part was heat-sealed. , that is, a pre-bonded nonwoven fabric block.

20 identical pieces were made in the same manner.

These cylindrical nonwoven fabric blocks are brought into close contact with each other, and the core shaft of a roll with a diameter of 500 mm and a length of 1300 mm is inserted, and the surface length of the roll in the axial direction, that is, the total length of the nonwoven fabric in the axial direction was set to 900mm.

On the other hand, a large number of small holes penetrating from the hollow portion to the surface were previously bored in the core shaft of the wound roll.

This material is compressed again and heated to approximately 150°C while still being compressed.
The roll was inserted into a constant temperature oven for about 30 minutes, then taken out from the oven and allowed to cool naturally, and the polypropylene fibers of the core were bonded to each other by heat fusion of the polyethylene of the sheath, thereby fixing the shape of the roll.

The surface of this fiber roll was ground to produce a fiber roll with a diameter of 700 mm and a length of 900 mm on a 10-round surface.

The two fiber rolls thus finished were combined into a pair, the hollow part of one of the fiber rolls was connected to a vacuum pump, and the roll was used as a dewatering roll for drying metal sheets.

In this example, almost the same results as in Example 2 were obtained compared to the conventional fiber roll.

(Effects of the Invention) The fiber roll manufactured by the manufacturing method according to the present invention has a shape in which the nonwoven fabric forming the roll surface layer is wound around a core shaft.
Since the fibers forming the nonwoven fabric are bonded to each other, it has good shape retention and excellent durability. Furthermore, since the strip-shaped nonwoven fabric is wound around the core shaft of the roll, the yield of the nonwoven fabric is higher and more economical than the conventional method in which the nonwoven fabric is cut into disk shapes.

In addition, by first manufacturing a nonwoven fabric block, then stacking the nonwoven fabric blocks and forming them into a fiber roll, it is possible to fabricate a more uniform and highly accurate fiber roll. The same effect as above can be obtained even if a non-woven fabric is used.

Furthermore, by making wedge-shaped notches on the inner circumferential side of the nonwoven fabric, it is possible to wrap the entire nonwoven fabric around the core with uniform density without causing wrinkles, making it possible to achieve a high degree of compression, resulting in fibers with high surface hardness. Rolls can be made.

The fiber roll manufactured by the method of manufacturing a fiber roll according to the present invention has excellent properties and economic efficiency, so it can be used in various industrial fields, especially for energy saving purposes such as drying and dehydration.
It is expected to bring significant technical and economic benefits.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing an example of an embodiment of the present invention. FIG. 2 is a front view including a partial axial cross section, showing an example of a fiber roll manufactured by the method for manufacturing a fiber roll according to the fourth invention. Core axis of the roll 2: Band-shaped nonwoven fabric 3: Inner circumferential side of the nonwoven fabric 2 4: Outer circumferential side of the nonwoven fabric 2 5: Wedge-shaped notch 6: Concave notch 7: Convex stripe
8: Back plate 9: Non-woven fabric block Patent applicant Masuda Seisakusho Co., Ltd. Patent attorney Mitsuru Nakaatsu Figure 1 Figure 2

Claims (6)

[Claims] (1) After wrapping a band-shaped nonwoven fabric made of multiple fibers with different melting points around the core shaft of a roll in a direction perpendicular to the axis, the nonwoven fabric is compressed and heated to form a fiber roll, and the nonwoven fabric is A method for producing a fiber roll, characterized by bonding the constituent fibers to each other. (2) In the method for manufacturing a fiber roll according to claim (1), the strip-shaped nonwoven fabric is a strip-shaped nonwoven fabric made of fibers that have a melting point and fibers that do not have a melting point. The method for producing a fiber roll according to (1). (3) The method for manufacturing a fiber roll according to claim (1), characterized in that the strip-shaped nonwoven fabric is a strip-shaped nonwoven fabric containing composite fibers made of a plurality of polymers having different melting points, or mixed fibers. A method for manufacturing a fiber roll according to claim (1). (4) Wrapping the band-shaped nonwoven fabric according to claim (1), (2), or (3) around a shaft-like object for preforming in a direction perpendicular to the shaft, and heating or compressing the wound nonwoven fabric. After heating and preliminarily bonding the fibers constituting the nonwoven fabric, the preliminarily bonded nonwoven fabric is removed from the preforming shaft to form a cylindrical or brim-shaped nonwoven fabric. A necessary number of the above-mentioned nonwoven fabric blocks are laminated in the core axis direction in order to obtain the required length of the fiber roll surface, and the core axis of the roll is inserted into the center core of the nonwoven fabric blocks, and the above-mentioned laminated fabric blocks are laminated in the core axis direction. A method for manufacturing a fiber roll, which comprises compressing the nonwoven fabric block, or compressing and heating it to form it into a fiber roll, and bonding the fibers constituting the nonwoven fabric to each other. (5) In the nonwoven fabric block according to claim (4), a band-shaped nonwoven fabric is wound around a shaft-like object for preforming in a direction perpendicular to the axis, and a bonding agent is added to bond the fibers constituting the nonwoven fabric to each other. Alternatively, after winding a band-shaped nonwoven fabric around a preforming shaft in a direction perpendicular to the shaft, the above-mentioned bonding agent is added to preliminarily bond the fibers constituting the nonwoven fabric. The bound nonwoven fabric is removed from the shaft-like object for preforming to form a cylindrical or flange-like object (
4) The method for producing a fiber roll according to item 4). (6) Claims (1), (2), (3), (4) or (
In the method for manufacturing a fiber roll described in 5), before winding around the core shaft of the roll or the preforming shaft-like object, on the inner circumferential side of the strip-shaped nonwoven fabric, toward the outer circumferential side, Claims (1), (2), and (3) characterized in that at least one notch is provided per circumference of the core axis of the roll.
, (4) or (5).