ES2945436T3 - Coreless Paper Roll Manufacturing Process - Google Patents

Abstract

A coreless wound paper manufacturing method is provided which enables paper that has been wound into a roll to be used all the way to the end thereof. This manufacturing method is characterized by comprising: a first step in which a roll-shaped paper 2 is wound to form a roll-shaped wound paper 1; a second step in which an inserter unit discharging an adhesive is inserted into a center hole 3 of the rolled paper 1; a third step in which the adhesive is applied at a prescribed location in the central hole 3; and a fourth step in which the place where the adhesive was applied is subjected to heat drying, and both ends 3a, 3b of the central hole 3 are hardened, in which in the third step, the adhesive is applied in the vicinity of both longitudinal ends. of the central hole 3, (Automatic translation with Google Translate, without legal value)

Description

DESCRIPTION

Coreless Paper Roll Manufacturing Process

technique field

The present invention relates to a process for manufacturing coreless paper rolls wound without being provided with a core, such as cardboard.

Background art

For example, when a fine paper material (paper) is to be wound onto a roll, such as a roll of toilet paper, the manufacturing process involves preparing a substantially tubular core formed of, for example, cardboard, and winding the paper around said core. When the toilet paper roll is completely used up, the remaining core becomes waste. For this reason, there are coreless toilet paper rolls that are formed without using cores.

For example, the manufacturing process for a coreless toilet paper roll involves spraying, for example, a low tack adhesive onto the leading edge of the paper, wrapping the leading edge of the paper around a winding shaft, and thus sequentially, winding the paper into a roll (for example, as can be seen in the patent literature 1). In detail, when a coreless toilet paper roll is to be manufactured, the leading edge of the paper is wrapped around the winding shaft, and while the paper is being wound five to six turns from the leading edge, the adhesive or the like it is sprayed onto this section so that it adheres to form a tubular shape. Furthermore, for example, when the paper is wound as described above, the winding shaft is heated so that the adhesive or the like spray dries.

There is also a coreless toilet paper roll manufacturing apparatus in which the shaft of a driving roller contacting the outer periphery of the wound paper when the paper is wound around a winding shaft is provided with holes from which an adhesive emerges (for example, as can be seen in the patent literature 2).

This apparatus carries out a manufacturing process including a paper winding step consisting of sucking the adhesive on the driving roller shaft, applying the adhesive to the paper pinched between the driving roller and the winding shaft, causing the adhesive comes out on the surface of the shaft, and winding said paper around said winding shaft into a roll shape. In detail, with respect to the driving roll, a roll section formed by a thick-walled cylindrical sponge is accommodated around the bore shaft as described above. Small capillary tubes are formed between the inner wall and the outer wall of the roller section, and the adhesive coming out of the surface of the shaft reaches the surface of the roller section through the capillary tubes. The adhesive coming out on the surface of the roller section is applied to the paper pinched between the winding shaft and the driving roller, so that the center of the toilet paper roll is hardened.

list of appointments

patent bibliography

PTL 1: Japanese Unexamined Patent Application Publication Number 6-199452.

PTL 2: Japanese Unexamined Patent Application Publication Number 9-216755.

US 2011/095117 A1 discloses a process for forming a tubular sheet product roll comprising forming a wet part in the core part of the paper and hardening the wet part to obtain a core part.

Summary of the invention

technical problem

Since the coreless paper roll according to the related art is manufactured in the above-described manner, the front wound section of the paper is hardened into a tubular shape. Therefore, when the time of running out of the paper roll approaches, for example, it becomes difficult to remove the paper roll from the holder holding the paper roll, which makes it difficult to completely run out of the paper roll even though it is the type without core. This aspect is a problem, because the hardened section in the center of the roll can be left unused.

The present invention has been carried out to solve the above-mentioned problem, and an object thereof is to provide a coreless paper roll-making process for making roll-wound paper which can be used to its end. trailing edge.

Solution to the problem

A process for making coreless paper rolls in accordance with the present invention includes a first step of winding up the paper to form a paper roll having a roll shape; a second step of inserting an insert section, which ejects an adhesive, into a central hole in the paper roll; a third step to cause the adhesive to adhere to a predetermined position of the center hole; and a fourth stage to carry out a heating and drying process in an area to which the adhesive adheres, to harden the opposite ends of the central hole. The third stage includes causing the adhesive to adhere to the nearly opposite extending ends of the center hole. The adhesive has sufficient adhesive strength that the paper wound in the form of a roll can be peeled off when the paper roll is to be used. The fourth step includes drying the adhesive adhered to the center hole before the adhesive extends from the predetermined position of the center hole.

Further, the second stage includes inserting the insert section toward the middle of the center hole from opposite extending ends of the center hole and increasing the diameter of the hole at opposite ends of the center hole to a predetermined size, and the third stage includes causing the adhesive to adhere to the areas of the center hole with the increased hole diameter.

Furthermore, the third stage includes decreasing the adhered amount of the adhesive toward the middle of the center hole from opposite extending ends of the center hole, and the fourth stage includes heating and drying such that the opposite ends of the center hole are harden to the max.

Advantageous effects of the invention

According to the present invention, the paper roll can be prevented from easily losing its shape in its packaged state when it is shipped and transported or the like, and can be fully utilized without leaving a core or the like when it is used.

Brief description of the drawings

Fig. 1 is a perspective view illustrating coreless toilet paper made using a coreless paper roll manufacturing process according to a first embodiment of the present invention.

Fig. 2 is an explanatory view illustrating a manufacturing step of the coreless paper roll shown in Fig. 1.

Fig. 3 is an explanatory view illustrating a manufacturing step of the coreless paper roll shown in Fig. 1.

Fig. 4 is an explanatory view illustrating a step for manufacturing a coreless paper roll using a coreless paper roll manufacturing method according to a second embodiment of the present invention.

Fig. 5 is an explanatory view illustrating a step for manufacturing the coreless paper roll using the coreless paper roll manufacturing method according to the second embodiment.

Description of embodiments

Next, embodiments of the present invention will be described.

(First embodiment)

Fig. 1 is a perspective view illustrating coreless toilet paper made using a coreless paper roll manufacturing process according to a first embodiment of the present invention. The illustrated roll of paper 1 is non-cored toilet paper, such as cardboard, and made by reeling the paper 2 having a central hole 3 as a through hole connecting opposite sides of the roll. The central hole 3 has an internal diameter similar to that of a common cardboard core.

The hole ends 3a and 3b (apertures) serving as opposite ends of the central hole 3 are sprayed with an adhesive or the like, which will be described later, to harden them so adequate. The hole ends 3a and 3b are hardened enough that when the paper 2 is pulled from the paper roll 1, said paper 2 having layers when wound up is peeled off without tearing.

Figures 2 and 3 illustrate the manufacturing steps of the coreless paper roll illustrated in Figure 1.

A toilet paper roll (ie, the paper roll 1) is manufactured by winding paper, obtained from a parent roll or the like, in a coreless state using a predetermined manufacturing apparatus (not illustrated). In this case, the paper 2 is wound into a roll using water or an adhesive or the like with extremely low adhesive force when necessary, or preferably without using water or an adhesive or the like. The paper roll 1 formed here does not have sections with sufficient rigidity as it is simply formed by winding the paper 2. Therefore, the paper roll 1 or the center hole 3 can be easily deformed and therefore easily lose its conformation.

The paper roll 1 in this state is placed, for example, in the predetermined manufacturing apparatus (not shown), and a tubular adhesive spray unit 10 provided in the manufacturing apparatus and having sealed tips is inserted into the central hole 3 of the paper roll 1, as illustrated in figure 2.

The adhesive spray unit 10 is configured so that an insertion end 10a and an insertion end 10b are respectively inserted from opposite ends into the peripheral walls of the paper roll 1, that is, opposite ends of the central hole 3, and includes a mechanism (not shown) to move said insert ends 10a and 10b.

The insertion ends 10a and 10b are arranged facing each other. Each of said insert ends 10a and 10b has a tubular shape with a sealed tip and each has a plurality of ejection holes extending to the surface thereof from its internal tubular hole. Specifically, the adhesive spray unit 10 is configured to eject an adhesive or the like, which is delivered to the holes in the inner tube of the tubular adhesive spray unit 10 by a transmission means such as a pump. , provided in the manufacturing apparatus (not shown), to the insertion end surface 10a or the like (from the ejection holes).

The insertion ends 10a and 10b have a similar length, for example, to that of the tiltable support members used to support and fix the paper roll 1 and provided in a common one-touch holder.

In other words, the insertion ends 10a and 10b have such a length that when the paper roll 1 is placed on the one-touch holder or the like, an adhesive or the like can be ejected in the areas where they come into contact. the support members of the one-touch holder inserted into the center hole 3, and are configured so as not to allow adhesive or the like to adhere to the middle area of the center hole 3 in the extension direction thereof, such as the area near the center along the roll axis (i.e., in the paper width direction 2) of paper roll 1.

With respect to the paper roll 1 placed at a predetermined position of the aforementioned manufacturing apparatus, the insertion end 10a of the adhesive spray unit 10 is inserted from the hole end side 3a of the central hole 3, and the end The insert 10b of the adhesive spray unit 10 is inserted from the end side of the hole 3b of the center hole 3.

For example, the insert ends 10a and 10b inserted into the center hole 3 are inserted at positions similar to those of the support members of the one-touch holder (i.e., deep into the center hole 3), as described above. described above, and expel the adhesive or the like. When the adhesive or the like is to be ejected to the inner wall of the central hole 3, the sticking amount of adhesive may be large at the ends of the hole 3a and 3b and may gradually decrease toward the deep area (ie, in the middle). of the central hole 3, so that the adhesive force is maximum at the open ends of the ends of the hole 3a and 3b and decreases towards the middle of the central hole 3 to finally be zero.

The adhering amount of the adhesive or the like can be regulated so that the wound paper 2 becomes harder near the hole ends 3a and 3b, the middle section of the paper roll 1 or the like is prevented from being hardened by the adhesive or the like. the paper 2 in the width direction, and a hardened section is also formed which makes it easy to peel off the paper 2 in the wound section near the center hole 3.

After spraying the adhesive or the like at the predetermined positions of the center hole 3, the insertion ends 10a and 10b are removed from the center hole 3, and a heating unit 11 provided in the manufacturing apparatus (not shown) is inserted into the ends of the hole 3a and 3b, as illustrated in figure 3.

The heating unit 11 includes, for example, a heating element and has heating ends 11a and 11b with tapered tips. The heating ends 11a and 11b are arranged opposite each other and, by including a mechanism (not shown) to allow insertion and withdrawal with respect to the central hole 3, they are similar to the insertion end 10a and the insertion end 10b described above.

The heating ends 11a and 11b have a substantially similar length to that of the insertion ends 10a and 10b described above, and have, for example, such a shape and size that they do not come into direct contact with the areas A to which it adheres. the adhesive or the like through the insertion ends 10a and 10b.

After the adhesive or the like is attached to the predetermined positions of the center hole 3 by the adhesive spray unit 10, for example, the heating unit 11 is immediately inserted into the center hole 3 and the adhesive or the like adhered to the predetermined positions of the central hole 3 penetrates the paper fibers. Accordingly, the above-mentioned areas are quickly dried and the predetermined areas are hardened so that the adhesive or the like does not spread more than necessary along the wound peripheral surface and does not spread to a large number of wound layers. The areas to be hardened are, for example, areas of the inner wall surface near the ends of the hole 3a and 3b on the lateral sides of the paper roll 1, so as to generate adequate rigidity to maintain the roll conformation (such as the stiffness in the axial shaft of the roll and the stiffness or the like to maintain the hole diameter of the center hole 3) and that the paper roll 1 can be easily rotated without being deformed when the paper roll 1 is placed in one touch support.

Because the heating ends 11a and 11b are tapered as described above, when the heating ends 11a and 11b are inserted into the central hole 3, the heating ends 11a and 11b are arranged closer to the hole. center 3 near the open ends of the ends of the hole 3a and 3b and distant from the center hole 3 in the middle thereof. Therefore, the heating and drying process performed near the open ends of the hole ends 3a and 3b is intense, while the heating and drying process performed in the middle of the central hole 3 is relatively moderate. The heating temperature and the drying period or the like are regulated and controlled to prevent burning caused by the heating ends 11a and 11b coming into contact with the center hole 3 or the paper roll 1 from taking place. For example, as described above, when the adhering amount of the adhesive or the like is maximum at the ends of the hole 3a and 3b of the central hole 3 and gradually decreases towards the middle, the heating task of the heating unit 11 is it can be controlled, in particular, so that the heating and drying process is carried out more intensively at the open ends of the ends of the hole 3a and 3b and the intensity of the heating and drying process is reduced towards the middle of the central hole 3. By drying and hardening only the predetermined positions of the center hole 3 using the heating unit 11 in this way, the paper roll 1 acquires enough rigidity to prevent it from losing its shape or the like.

(Second embodiment)

Figures 4 and 5 illustrate the manufacturing steps of a coreless paper roll using a coreless paper roll manufacturing process according to a second embodiment of the present invention. The paper roll 1a according to the second embodiment is coreless toilet paper, provided with a narrow hole (not shown) as the center hole and is made so as to be placed, for example, in a holder equipped with a core. specific strait. The paper roll 1a is similar to the paper roll 1 described above in that it does not have a core, such as cardboard, and is obtained by winding paper 2 using water or an adhesive or the like with extremely low adhesive strength where necessary or preferably without using water or an adhesive or the like in the central narrow hole. The above-described paper roll 1a is placed in a predetermined manufacturing apparatus (not shown), and an adhesive spray unit 20 provided in the manufacturing apparatus is inserted into the narrow hole (that is, the central hole ) of the paper roll 1a, as illustrated in figure 4.

Similar to the adhesive spray unit 10 described above, the adhesive spray unit 20 has a tubular shape with sealed tips and is configured so that an insertion end 20a and an insertion end 20b are inserted respectively from opposite ends on the peripheral walls of the paper roll 1a, that is, opposite ends of the narrow central hole, and includes a mechanism (not illustrated) for moving said insertion ends 20a and 20b.

The adhesive spray unit 20 has a plurality of ejection holes extending to the insertion end surfaces 20a and 20b from the inner tube holes thereof. Specifically, the adhesive spray unit 20 is configured to eject, for example, an adhesive that is delivered to the holes in the inner tube of the adhesive spray unit 20 by a transmission means, such as a pump, provided in the apparatus. of manufacture (not shown), to the surface of, for example, the insertion end 20a (from the ejection holes).

The insertion ends 20a and 20b have a similar length, for example, to that of the tiltable support members used to support and fix the paper roll 1a and provided in a common one-touch holder.

Furthermore, the insert ends 20a and 20b are configured to increase the inner diameter of the narrow hole of the paper roll 1a to a predetermined size so as to form center holes 4a and 4b having a circular shape and adhering an adhesive to the inner walls of the central holes 4a and 4b.

In other words, the insertion ends 20a and 20b have at least such a length that when the paper roll 1a is placed, for example, in the one-touch holder, the central holes 4a and 4b can be formed with sufficient depth to allow the support members of the one-touch support to be inserted therein and, for example, an adhesive can be expelled in the areas where the support members of the one-touch support come into contact.

With respect to the paper roll 1a placed at a predetermined position of the above-mentioned manufacturing apparatus, the insertion end 20a of the adhesive spray unit 20 is inserted from the side of the center hole 4a, and the insertion end 20b of the Adhesive spray unit 20 is inserted from the side of the center hole 4b.

For example, the insertion ends 20a and 20b respectively inserted into the center holes 4a and 4b are inserted at positions similar to those of the support members of the one-touch holder as described above, and expel the adhesive or the like. .

When the adhesive or the like is to be ejected from the center holes 4a and 4b, the adhering amount of the adhesive or the like may be large at the side ends (ie, the openings of the center holes 4a and 4b) of the paper roll 1a and may gradually decrease toward the deep areas of the center holes 4a and 4b (ie, in the middle of the paper roll 1), so that the adhesive force decreases toward the deep areas of the center holes 4a and 4b to finally be null.

The adhering amount of the adhesive or the like can be regulated so that the wound paper 2 becomes harder near the side ends of the paper roll 1a, the middle section of the paper roll 1a is prevented from being hardened by the adhesive or the like in the width direction, and a hardened section facilitating peeling off of the paper 2 is also formed near the terminal ends (ie, the center holes 4a and 4b) of the paper roll 1a.

After spraying the adhesive, for example, at the predetermined positions of the center holes 4a and 4b, the insert ends 20a and 20b are respectively withdrawn from the center holes 4a and 4b, and a heating unit 21 provided in the manufacturing apparatus (not shown) in the central holes 4a and 4b, as shown in figure 5.

Similar to heating unit 11, heating unit 21 includes, for example, a heating element and provides heating ends 21a and 21b with tapered tips. Said heating ends 21a and 21b are arranged facing each other and include a mechanism (not illustrated) to allow the insertion and removal of the central holes 4a and 4b, respectively. The heating ends 21a and 21b have a substantially similar length to that of the previously described insertion ends 20a and 20b and have, for example, such a shape and size that they do not come into direct contact with the areas to which they are attached. the adhesive or the like is attached via the insertion ends 20a and 20b.

After the adhesive or the like is attached to the predetermined positions of the center holes 4a and 4b by the adhesive spray unit 20, for example, the heating unit 21 is immediately inserted into the center holes 4a and 4b, and the adhesive or the like attached to the predetermined positions of the center holes 4a and 4b penetrates into the paper fibers. Consequently, the above-mentioned areas dry quickly and the predetermined areas harden so that, for example, the adhesive does not spread more than necessary along the wound peripheral surface and does not spread to a large number of wound layers. . The areas to be hardened are, for example, areas of the inner wall surfaces of the center holes 4a and 4b in the lateral sides of the paper roll 1a, so as to produce adequate rigidity to maintain the shape of roll (such as the rigidity in the axial direction of the roll and the rigidity to maintain the diameter of the center holes 4a and 4b) and that the paper roll 1a can be easily rotated without being deformed when the paper roll 1a is placed on the one touch support.

Because the heating ends 21a and 21b taper as described above, when the heating ends 21a and 21b are inserted into the respective center holes 4a and 4b, the heating ends 21a and 21b are more closely arranged. near the central holes 4a and 4b near the open ends thereof and distant from the central holes 4a and 4b in the deep areas thereof. Therefore, the heating and drying process performed near the open ends of the center holes 4a and 4b is intense, while the heating and drying process performed in the deep areas of the center holes 4a and 4b is relatively moderate. The heating temperature, the drying period and the like are regulated and controlled to prevent burning caused by the heating ends 21a and 21b coming into contact with the center holes 4a and 4b or the paper roll 1a. Further, for example, as described above, when the adhering amount of the adhesive or the like is maximum at the open ends of the center holes 4a and 4b and gradually decreases towards the middle of the paper roll 1a or the paper 2 on the width direction, the heating task of the heating unit 21 can be controlled in in particular so that the heating and drying process is carried out more intensively at the open ends of the central holes 4a and 4b and the intensity of the heating and drying process is reduced towards the deep areas of the central holes 4a and 4b (i.e. , towards the middle).

By drying and hardening the center holes 4a and 4b using the heating unit 21 in this way, the paper roll 1a becomes rigid enough to prevent it from losing its shape.

When the coreless paper roll 1 or 1a is to be manufactured in this way, the open ends of the center hole or holes formed in the center of the roll harden the most, and the adhesive force is reduced or nullified to a lesser extent. the middle section of the paper 2 in the width direction, so that the paper 2 can be peeled off and used even in the middle section of the roll (ie, in the section of the paper 2 that is to be completely used up).

List of reference signs

I, 1st roll of paper

2 role

3, 4a, 4b center hole

3a, 3b hole end

10, 20 unit spray adhesive

10a, 10b, 20a, 20b insertion end

I I , 21 heating unit

11a, 11b, 21a, 21b warm-up end

Claims (3)

1. Paper roll manufacturing process comprising: a first step of winding paper (2) to form a roll of paper (1, 1a) having a roll shape; characterized in that the procedure comprises a second step of inserting an insert section (10, 20), which ejects an adhesive, into a central hole (3, 4a, 4b) of the paper roll (1, 1a); a third step to make the adhesive adhere to a predetermined position of the central hole (3, 4a, 4b); and a fourth stage to carry out a heating and drying process in an area to which the adhesive adheres, so that the opposite ends (3a, 3b) of the central hole (3, 4a, 4b) harden, in which the The third stage includes causing the adhesive to adhere near the ends (3a, 3b) extending almost opposite the central hole (3, 4a, 4b), the adhesive presenting an adhesive force such that the paper (2) wound on the roll shape can be detached when the paper roll (1, 1a) is to be used, and wherein the fourth step includes drying the adhesive adhered to the center hole (3, 4a, 4b) before said adhesive extends from the predetermined position of the center hole (3, 4a, 4b). 2. Process for manufacturing rolls of paper according to claim 1, wherein the second step includes inserting the insert section (10, 20) toward a middle of the center hole (4a, 4b) from opposite extending ends of the center hole (4a, 4b) and increasing a diameter of the hole by the opposite ends of the central hole (4a, 4b) to a predetermined size, and wherein the third step includes causing the adhesive to adhere to areas of the central hole (4a, 4b) with the increased hole diameter. 3. Process for manufacturing rolls of paper according to claim 1 or 2, wherein the third step includes tapering an adhered amount of the adhesive toward the middle of the center hole (3, 4a, 4b) from opposite extending ends (3a, 3b) of the center hole (3, 4a, 4b), and wherein the fourth step includes carrying out heating and drying so that the opposite ends (3a, 3b) of the central hole (3, 4a, 4b) are maximally hardened.