JP7140255B2 - Tissue paper manufacturing method and tissue paper products manufactured by the method - Google Patents

Description

TECHNICAL FIELD The present invention relates to a tissue paper to which a moisturizing agent is added.

Conventionally, tissue paper to which a moisturizing agent is added has been widely used in order to improve the feel of the skin.

In the production of the tissue paper, a continuous sheet pulled out from a raw roll is coated with a moisturizing agent and wound, and the continuous sheet in roll form after application is placed for a predetermined time to allow the continuous sheet to absorb the moisturizing agent. , and then cut into the product width and folded to produce the tissue paper to which the moisturizing agent is added. This production is described, for example, in US Pat.

Japanese Unexamined Patent Application Publication No. 2011-207580

Here, the temperature in the area where the continuous sheet is installed, in which the step of applying the moisturizing agent to the continuous sheet is performed, and the temperature in the area in which the step of applying the moisturizing agent is performed are optimized. Otherwise, the moisturizer may volatilize unnecessarily.

These points are not taken into consideration in the invention described in Patent Document 1, and there is still room for improvement in the optimum method for applying a moisturizing agent to tissue paper.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method for producing tissue paper that can suppress unnecessary volatilization of a moisturizing agent from the tissue paper.

A method for producing a tissue paper according to the present invention is a method for producing a tissue paper to which a humectant is added, and includes a coating step including a step of applying a humectant to the tissue paper produced in the papermaking process, and the humectant After the covering step, in order to perform the covering step of covering the first roll of tissue paper coated with a non-water-permeable member with the water-impermeable member, and aging the covered first roll with the moisturizing agent, an aging step of leaving the covered first roll placed in an installation area for a predetermined time, wherein the temperature in the installation area where the aging step is performed is adjusted to the coating area where the coating step is performed. characterized by a lower temperature than the internal temperature.

Moreover, the tissue paper product according to the present invention is obtained by filling a carton with the tissue paper manufactured by the tissue paper manufacturing method according to the present invention.

According to the present invention, it is possible to suppress unnecessary volatilization of the moisturizing agent from the tissue paper.

1 is a block diagram of an apparatus that performs a coating step in a tissue paper manufacturing method according to an embodiment of the present invention; FIG. 1 is a flow of a tissue paper manufacturing method according to an embodiment of the present invention.

One embodiment of the tissue paper manufacturing method according to the present invention will be described in detail with reference to FIGS. 1 and 2. FIG. However, the present invention is not limited to this embodiment.

The tissue paper manufacturing method according to the present embodiment includes five steps: a papermaking step, a coating step, a covering step, an aging step, and a carton filling step.

A papermaking apparatus (papermaking means) that performs a papermaking process manufactures a plurality of primary web rolls from a papermaking raw material.

In the present invention, wood pulp, non-wood pulp, and deinked pulp can be mentioned as the pulp component contained in the pulp slurry as the raw material for papermaking. Examples of wood pulp include hardwood pulp (hardwood kraft pulp (LKP)), softwood pulp (softwood kraft pulp (NKP)), sulfite pulp (SP), dissolving pulp (DP), soda pulp (AP), and unbleached pulp. Kraft pulp (UKP), chemical pulp such as oxygen bleached kraft pulp (OKP). Examples of wood pulp include semi-chemical pulp (SCP), semi-chemical pulp such as chemigroundwood pulp (CGP), groundwood pulp (GP), and mechanical pulp such as thermomechanical pulp (TMP, BCTMP). mentioned. Examples of non-wood pulp include cotton pulp such as cotton linters and cotton lint, non-wood pulp such as hemp, straw and bagasse, cellulose isolated from sea squirts and seaweeds, chitin, chitosan, and the like. . Examples of deinked pulp include pulp obtained by deinking waste paper as a raw material. As the pulp component, one of the above pulps may be used alone, or two or more may be used in combination. As the pulp component, it is preferable to use at least one selected from softwood pulp and hardwood pulp. Among them, as the pulp component, it is preferable to use softwood pulp and hardwood pulp together, and it is more preferable to use softwood kraft pulp (NKP) and hardwood kraft pulp (LKP) together.

In this embodiment, the pulp slurry is prepared by preparing a mixture of 70% by mass of softwood bleached kraft pulp (NBKP) and 30% by mass of broadleaf bleached kraft pulp (LBKP), and adding 99 parts by mass of this mixture to 0.1 part by mass of this mixture. It is prepared by adding .9 parts by mass.

Further, in the present embodiment, the continuous sheet (base paper) wound around the primary roll is produced by forming the pulp slurry using a two-layer twin wire former, followed by dehydration and drying. The resulting product has a basis weight of 15.1 g/m ² .

FIG. 1 shows a block diagram of a coating device (coating means) 1 that performs a coating step in the tissue paper manufacturing method according to the present embodiment. The coating device 1 includes a ply section (ply means) RP that performs a ply process of overlapping continuous sheets (one-ply tissue paper) pulled out (or fed out) from a plurality of primary rolls, and plying means. and a coating section (coating means) 2 for performing a coating step of coating a moisturizing agent on the continuous sheet.

In this embodiment, in the coating process, the two primary material rolls W _R1 made in the papermaking process are moved to the coating area and set in the coating device 1 as shown in FIG. . The continuous sheet W ₁ wound around the primary roll W _R1 has an inner surface (that is, an adhesive surface) FB that becomes the inner _side when _plying , and an outer surface FF that becomes the outer side. Then, as shown in FIG. 1, the coating device 1 moves the inner surface F _B of the one-layer continuous sheet W ₁ unwound at the processing speed V _Ua from the primary material roll W _R1a by the rewind reel R _U1a . and the inner surface F _B of the one-layer continuous sheet W ₁ unwound from the first original roll W _R1b by the rewind reel R _U1b at the processing speed V _Ub are overlapped at the ply portion R _P to form the first A two-layer laminated continuous sheet ( ₂ -ply tissue paper) W2 having a layer F1 and _{a second} layer F2 is produced. Next, as shown in FIG. 1, the coating device 1 applies a moisturizing agent to the ply laminated continuous sheet W ₂ in the coating section 2 . After applying the moisturizing agent, the coating device 1 winds up the laminated continuous sheet W2 coated with the moisturizing agent by the take-up reel R _W to manufacture the _second raw roll W _R2 . After that, the secondary material roll W _R2 is cut into a size that can be covered with an aging cover member, which will be described later. This cut roll is hereinafter referred to as the "first roll".

In the present invention, the moisturizing agents include, for example, aloe extract, long life herb extract, hypericum extract, barley extract, orange extract, seaweed extract, chamomile extract, cucumber extract, comfrey extract, burdock extract, shiitake extract, rhubarb extract, perilla extract, Sage extract, Duke extract, Cordyceps extract, Houttuynia cordata extract, Hatake shimeji extract, Loquat extract, Grape leaf extract, Fuyubodaiju extract, Prune extract, Loofah extract, Botanpi extract, Maikai extract, Peach extract, Lily extract, Apple extract, Almond oil, Olive oil, Sesame oil , safflower oil, dimethyl silicone, silicone oil, modified silicone, soybean oil, camellia oil, castor oil, jojoba oil, mink oil, coconut oil, lanolin, arabinose, galactose, xylose, glucose, sucrose, sorbitol, fructose, maltose, Maltitol, mannose, beeswax, hyaluronic acid, placenta extract, rhamnose, xylobiose, xylooligosaccharide, tuberose polysaccharide, trisaccharide, trehalose, soluble collagen, glycyrrhizin, chondroitin sulfate, diglycerin, squalane, ceramide-like compound, triglycerin, urea , vitamin C phosphate calcium salt, vitamin E, sodium pyrrolidonecarboxylate, hinokitiol, liquid paraffin, vaseline, polyhydric alcohol, and the like. Among these moisturizing agents, aloe extract, long-life herb extract, hypericum extract, comfrey extract, perilla extract, sage extract, ceramide-like compounds, houttuynia cordata extract, grouper shimeji extract, loquat extract, barnacle extract, botanpi extract, castor oil, jojoba oil , lanolin, hyaluronic acid, placenta extract, rhamnose, xylooligosaccharides, soluble collagen, glycerin, chondroitin sulfate, squalane, urea and polyhydric alcohols. Examples of polyhydric alcohols include ethylene glycol, glycerin, 1,3-butylene glycol, propylene glycol and the like. Among them, the moisturizing agent preferably contains glycerin. As the moisturizing agent, one type of the above compounds may be used alone, or two or more types may be used in combination.

In this embodiment, a moisturizing agent containing 85% by mass of glycerin and 15% by mass of water was used. Then, the moisturizing agent having the composition was applied to the two-ply base paper using the offset gravure method.

In the present embodiment, the coating device 1 includes means for performing the ply process, but this is not the only option. You may perform a process separately. In other words, the laminated continuous sheet that has been made into two layers by the ply process may be wound up, the wound roll may be moved to the coating area, and the moisturizing agent may be applied to the laminated continuous sheet pulled out from the roll. . At this time, the one-ply tissue paper (continuous sheet) produced in the papermaking process is rolled in a state in which two plies are overlapped to form a roll. In the present invention, when the roll-shaped tissue paper is used as the second roll, the winding diameter of the second roll is preferably 1100 mm or less, and the winding width (roll width) is 200 mm or more and 2500 mm or less. is preferable, and the winding length (roll length) is preferably 1000 m or more and 7000 m or less. In this embodiment, the second roll has a winding width of 1200 mm and a winding length of 5000 m.

Further, in the present embodiment, the moisturizing agent is applied to only one surface of the continuous laminated sheet W2 by the application unit ₂ , but in the present invention, the moisturizing agent may be applied to _both surfaces of the continuous laminated sheet W2. With this configuration, the speed at which the moisturizing agent is applied to the entire tissue paper can be increased, and productivity can be improved.

In the present invention, the coating step includes a winding step of winding a continuous sheet coated with a moisturizing agent to form a roll, and the time between the winding step and the covering step is 5 minutes or more and 30 minutes or less. Space out. This makes it possible to moderately volatilize the moisturizing agent on the outermost sheet in the first roll, that is, the sheet that is likely to come into contact with the water-impermeable member for aging described later, and easily cover it with the water-impermeable member. It is for In this embodiment, the interval between the winding process and the covering process (that is, the time from the end of coating (after winding) to the start of covering) is 10 minutes.

The first roll coated with the moisturizing agent is moved to an aging area (hereinafter also referred to as "installation area"), installed on a pallet so that its winding axis is vertical, and placed on the pallet, on the floor or stored on the shelf.

In the present invention, the first roll placed on the pallet can be wrapped with a water-impermeable member (eg, plastic film). However, in the present invention, the first roll placed on the pallet is not limited to this, and is preferably covered with a bag-like non-permeable member (plastic film) and the opening of the bag is fixed to the pallet. . With this configuration, the sealing performance with respect to the first roll can be improved and volatilization of the moisturizing agent can be suppressed as compared with the body wrap. In this embodiment, the water-impermeable member is bag-shaped, and as will be described later, the material of the water-impermeable member is polypropylene. Further, in the present invention, the first roll may be covered with a non-water-permeable member in the coating area or other areas instead of the aging area.

The impermeable member covering the first roll according to the present invention is preferably a plastic film. Here, low-molecular-weight components such as additives added to give functions to plastic films may appear on the surface of plastic films and bleed, and the smell of the additives may spread to the tissue paper. likely to move. In the present embodiment, as will be described later, the aging time is set to 3 to 12 hours, thereby suppressing transfer of the odor of the additive. Examples of the additives include plasticizers and stabilizers added to soften plastic films.

In the present invention, the water-impermeable member is composed of, for example, a plastic film, and the plastic film includes, for example, PP (polypropylene), PE (polyethylene), polyvinyl chloride, polyester, and the like. The plastic film preferably contains PP (polypropylene) or PE (polyethylene). In this embodiment, the material of the impermeable member is polypropylene. The plastic film may consist, for example, of a thickness of 0.02 mm. Examples of the plasticizer include, but are not particularly limited to, PP random copolymers.

Further, in the present invention, the cut first roll begins to be covered with the impermeable member in the cover section within 60 minutes from the start of application of the moisturizing agent by the application section 2 . This is to prevent the moisturizing agent from volatilizing unnecessarily when moving to the aging area. In the present specification and claims, the term "cover" includes "wrapping" and "sealing" in addition to the so-called "covering" meaning that another object is placed on or outside the object. Referenced. In the present embodiment, the cut first roll begins to be covered with the impermeable member in the cover section within 50 minutes from the start of application of the moisturizing agent by the application section 2 .

The first roll covered with the water-impermeable member is left in the installation area for a predetermined period of time after the covering step in order to perform aging in which the moisturizing agent is applied in the aging area. In the present invention, the predetermined time is preferably 3 hours or more and 12 hours or less, more preferably 3 hours or more and 6 hours or less, in order to effectively exhibit the effects of the invention. In this embodiment, the predetermined time is four hours.

The temperature in the installation area where the aging process is performed is lower than the temperature in the coating area where the coating process is performed. This makes it possible to suppress unnecessary volatilization of the moisturizing agent from the tissue paper.

A carton filling device (carton filling means) that performs a carton filling process cuts (cuts) the tissue paper pulled out from the first roll after the aging process to a desired width (e.g., product width), and the cut tissue paper and fill the folded tissue paper bundle into a carton. The folding process is performed in a facility that includes a rotary or multi-stand interfolder. A tissue paper product to which a moisturizer is added is completed by filling a carton with the tissue paper manufactured by the tissue paper manufacturing method described above.

FIG. 2 is a flow of a tissue paper manufacturing method according to the present embodiment.

In the papermaking step S1, the papermaking means manufactures a first raw fabric roll from a papermaking raw material.

In the coating step S2, the coating means (coating device 1) superimposes one layer of tissue paper pulled out from the two first raw rolls moved to the coating area into two layers, and 2 A moisturizing agent is applied to one side (or both sides) of the tissue paper of the ply, and the tissue paper after applying the moisturizing agent is wound up and cut to produce a first roll.

In the covering step S3, the first roll after applying the moisturizer is moved to the aging area, placed on a pallet in the aging area, and wrapped with a plastic film to cover it (or, for example, covered with a bag-like plastic film, secure the opening of the bag to the pallet).

In the aging step S4, the plastic film-covered first roll is left on the pallet for a predetermined period of time (eg, 3 to 12 hours) to soak the tissue paper with the moisturizing agent.

In the carton filling step S5, the carton filling means cuts the tissue paper pulled out from the first roll after soaked with the moisturizing agent to the product width, and then fills the folded carton with a rotary or multi-stand interfolder. do.

Conventionally, as the production of moisturizing tissue paper to which a moisturizing agent is added, a moisturizing agent is applied to a continuous sheet pulled out from a raw roll and wound up, and the continuous roll-shaped sheet after application is placed for a predetermined time. is applied to a continuous sheet, and then cut into a product width and folded to produce tissue paper to which a moisturizing agent is added.

Here, the temperature in the area where the continuous sheet is installed, in which the step of applying the moisturizing agent to the continuous sheet is performed, and the temperature in the area in which the step of applying the moisturizing agent is performed are optimized. Otherwise, the moisturizer may volatilize unnecessarily.
Further, in the above-mentioned step of applying the moisturizing agent to the continuous sheet, in order to suppress volatilization of the moisturizing agent, when the rolled continuous sheet after application is wrapped with a plastic film, the continuous sheet is familiarized with the moisturizing agent. If the time is too long, there is a risk that the odor of the wrapped plastic film (for example, the odor of the plasticizer) will transfer to the tissue paper. On the other hand, if the time is too short, the moisturizing agent may not be sufficiently absorbed into the tissue paper.

According to this embodiment, it is possible to suppress unnecessary volatilization of the moisturizing agent from the tissue paper.
In addition, according to the present embodiment, the water-impermeable member covers the roll-shaped tissue paper after the moisturizing agent has been applied for a predetermined time. It is possible to sufficiently permeate the Further, by limiting the aging time to a certain range, it is possible to suppress the transfer of the odor of the impermeable member to the tissue paper.

In addition, since the moisturizing agent sufficiently permeates the entire tissue paper and spreads evenly, the texture and moist feeling can be improved.

Furthermore, since the aging time is shorter than in the past, the time required for manufacturing can be shortened, and productivity can be improved.

<Others>
The present invention is not limited to the above-described forms, embodiments, and modified examples, and can be modified and modified without departing from the technical idea of the present invention.

For example, the tissue paper according to each of the above-described embodiments, examples, and modifications thereof has two plies, but the present invention is not limited to this, and one ply or three or more plies can also be applied.

W _R1a , W _R1b Primary roll W _R2 Secondary roll R _U1a , R _{U1b Unwinding} reel R _W Winding reel R _P Ply section V _Ua , V _Ub Processing speed W ₁ Continuous sheet W ₂ Lamination Continuous sheet _F Outer surface of laminated continuous sheet F _B Inner surface of laminated continuous sheet F ₁ First layer sheet F ₂ Second layer sheet 1 Coating device 2 Coating section

Claims (13)

A method for producing a tissue paper to which a moisturizer is added,
A coating process including a process of applying a moisturizer to the tissue paper manufactured in the papermaking process;
A covering step of covering a first roll of tissue paper coated with the moisturizing agent with a non-permeable member;
an aging step of leaving the covered first roll in an installation area for a predetermined period of time after the covering step for aging the covered first roll to absorb the moisturizing agent. ,
The tissue paper manufacturing method, wherein the temperature in the installation area where the aging process is performed is lower than the temperature in the coating area where the coating process is performed. 2. The method of manufacturing tissue paper according to claim 1, wherein the predetermined time is 3 hours or more and 12 hours or less. 3. The method of manufacturing tissue paper according to claim 2, wherein the predetermined time is 3 hours or more and 6 hours or less. 4. Manufacturing the tissue paper according to any one of claims 1 to 3, wherein the first roll is covered with the impermeable member within 60 minutes from the start of application of the moisturizing agent. Method. The coating step includes a winding step of winding the tissue paper coated with the moisturizing agent into a roll,
5. The method of manufacturing tissue paper according to any one of claims 1 to 4, wherein an interval of 5 minutes or more is provided between the winding step and the covering step. 6. The method according to any one of claims 1 to 5, wherein in the aging step, the covered first roll is placed in the setting area such that the winding axis of the first roll is vertical. A method for producing the tissue paper according to the above item. The impermeable member has a bag shape,
In the covering step, the first roll is installed on a plate member in the installation area so that the winding axis is vertical, and is covered with the bag-shaped impermeable member,
7. The method of manufacturing tissue paper according to claim 1, wherein the opening of the bag-like impermeable member is fixed to the plate-like member. The one-ply tissue paper produced in the papermaking process is wound into a roll in a state in which two plies are overlapped, and when the roll-shaped tissue paper is the second roll, the second roll is 1100 mm or less, the winding width of the second roll is 200 mm or more and 2500 mm or less, and the winding length of the second roll is 1000 m or more and 7000 m or less. The method for manufacturing the tissue paper according to any one of claims 7 to 7. The tissue paper according to any one of claims 1 to 8, wherein the coating step includes a step of applying the moisturizing agent to both sides of the tissue paper manufactured in the papermaking step. Production method. A step of cutting the tissue paper pulled out from the tissue paper roll after the aging step to a desired width, a step of folding the cut tissue paper, and a step of filling the bundle of the folded tissue paper into a carton. , further including
10. The method of manufacturing tissue paper according to any one of claims 1 to 9, wherein the folding step is performed in equipment including a rotary type or multi-stand type interfolder. 11. The method of manufacturing tissue paper according to any one of claims 1 to 10, wherein the impermeable member comprises a plastic film. 12. The method of manufacturing tissue paper according to claim 11, wherein the plastic film contains polypropylene or polyethylene. A tissue paper product obtained by filling a carton with the tissue paper manufactured by the tissue paper manufacturing method according to any one of claims 1 to 12.

Images