JPH03213170A - Method and apparatus for making effective component adhere to web having air permeability - Google Patents

Abstract

PURPOSE:To make an effective component adhere without hindrance by generating differential pressure capable of allowing air to pass on the front and rear sides of a web having air transmissible property and passing a gaseous mixture through the web by utilizing the difference pressure. CONSTITUTION:When a blower 21 is operated in a differential pressure generator 2, air is refluxed to a blower suction port 23 from an outlet 22 through a blowoff passage 24, an outer partition chamber 26, the vent holes 12 of a rotary cylinder 11, an inner partition chamber 27 and a suction passage 25 and continuously circulated in a closed passage held to a hermetically closed state. A web W is interposed between the outer partition chamber 26 and the outer peripheral surface of the rotary cylinder 11, and the air in the blowoff passage 24 and the outer partition chamber 26 is compressed to become high pressure when the blower 21 is operated. Differential pressure is generated between the chamber 28, 29 on the front and rear sides of the web W and air passes through the web W by the differential pressure to make component mist adhere to the web W.

Description

Detailed Description of the Invention (Field of Industrial Application) The present invention provides a method for applying chemicals, fragrances, The present invention relates to a method and apparatus for depositing active ingredients such as oils and fats.

(Background of the Invention and Prior Art) In recent years, with the trend toward higher-end products, there has been a demand for the development of high value-added products according to the uses, even on the web as described above. For example, chemicals depending on the application are attached to the web to impart medicinal effects, fragrance ingredients are attached to the web to impart an aromatic effect, and oils and fats are attached to the web to impart a cleaning aid effect. By doing so, it is possible to provide a web with added value.

By the way, as a conventional method for attaching chemicals, oils, etc. to paper-like webs, a single-type roll coater or a single-type blade coater has been commonly used. In this method, a liquid coating agent is applied onto the surface of a continuously running base material (web) using a roll or a blade.

(Problem to be Solved by the Invention) However, in the conventional coating method and coating device as described above, the liquid coating agent is applied directly to the web surface, so even if the web has high wet strength, However, there is a problem in that it is not possible to directly apply a liquid coating agent to a web with low wet strength, such as toilet paper, and it is also possible to apply a coating agent to the web in a small amount and uniformly. It was technically difficult to attach it to the

In view of the problems of the above-mentioned conventional methods and devices for applying coating agents to webs, the present invention makes it possible to adhere active ingredients such as chemicals, fragrances, oils and fats without any problem even to webs with low wet strength. This paper proposes a method for depositing active ingredients and an apparatus for the same.

(Means for Solving the Problems) The method for attaching an active ingredient to a web according to the invention of claim 1 of the present application is to apply gas to each side of the front and back sides of an air permeable web supported in a stretched state through the fibers of the web. A pressure difference sufficient to allow the web to flow is generated, and a mist of chemicals, fragrances, oils and fats, or a mixed gas containing vaporized components is passed from one side of the web to the other side using the pressure difference. It is characterized in that the effective ingredients in the component gas mixture are attached to the web.

Further, the device for applying active ingredients to a web according to the invention of claim 2 of the present application includes a web support device that supports an air-permeable web in a stretched state, and a web support device that supports a web having air permeability in a stretched state, and a web that is attached to each side of the web supported by the web support device. Each of the provided chambers is equipped with a differential pressure generating device that generates a differential pressure sufficient to allow gas to flow through the fibers of the web, and a component misting device that converts liquid components such as chemicals, fragrances, oils and fats into mist. In addition, the present invention is characterized in that the mist mixture gas generated by the component mist forming device is supplied into the high pressure chamber generated by the differential pressure generating device.

Furthermore, the active ingredient adhering device for a web according to the invention of claim 3 of the present application includes a web support device that supports an air permeable web in a stretched state, and a web support device that supports a web having air permeability in a stretched state, and Each provided chamber is equipped with a differential pressure generating device that generates a differential pressure sufficient to allow gas to flow through the fibers of the web, and a component vaporizing device that heats and vaporizes components such as chemicals, fragrances, oils and fats. In addition, the present invention is characterized in that the vaporized component mixed gas generated by the component vaporizer is supplied into the high pressure chamber generated by the differential pressure generator.

(Function) In the invention of claim 1 of the present application, a component mixed gas containing mist or vaporized components of chemicals, fragrances, oils and fats, etc.
Since the pressure difference generated between the front and back sides of the breathable web is used to pass through the web, when the component mixture gas passes through the web, the filter effect causes the gas to pass through the web. The active ingredients in the component gas mixture become attached to the fibers of the web. In addition, at this time, the active ingredient to be attached to the web passes through the web in a mist or vaporized state, so the web is not wetted (
Even if the component gas mixture is a mist, it will not become so wet that the web will be adversely affected).

Further, in the invention of claim 2 of the present application, the web can be supported in a stretched state by the web supporting device, the differential pressure can be generated on each side of the web by the differential pressure generating device, and the component misting device can generate a differential pressure on each side of the web. It is possible to generate a mist mixture gas by turning liquid components such as chemicals, fragrances, oils and fats into a mist, and further by supplying the mist a gas into the high pressure chambers generated on the front and back sides of the web. The mist gas mixture can be passed through the fibers of the web using the differential pressure generated between the front and back sides of the web.

Furthermore, the invention of claim 3 of the present application includes a component vaporization device that heats and vaporizes components such as chemicals, fragrances, oils and fats, in place of the component misting device in the invention of claim 2. The vaporized components generated in the component vaporization device can be passed through the fibers of the web using the differential pressure.

(Effects of the Invention) According to the method for attaching active ingredients to a web according to the invention of claim 1 of the present application, a mist of chemicals, fragrances, oils and fats, or a component mixed gas containing vaporized components is applied to each of the front and back sides of the web. Since the differential pressure generated is used to pass the web from one side to the other side, the web is not wetted when the active ingredients such as chemicals, fragrances, oils and fats are attached to the web. (Therefore, even webs with low wet strength, such as tissue paper or toilet paper, can be used to deposit the above-mentioned active ingredients.Also, since the component gas mixture passes between the fibers of the web, e.g. It is possible to increase the adhesion efficiency of the active ingredient compared to the case where the component mixed gas is simply sprayed onto the web surface, and the active ingredient can be evenly adhered to the web.In particular, when using a 1F tissue as a base material, it is possible to increase the adhesion efficiency of the active ingredient. Low basis weight like paper (12~15g/n+”
) also has the effect of allowing the active ingredient to be deposited safely and uniformly.

Moreover, according to the active ingredient adhering device for a web according to each invention of claims 2 and 3 of the present application, the device includes a web support device, a differential pressure generating device, and a component mist forming device (or component vaporizing device), and Since the component mixed gas generated by the vaporization device (or component vaporization device) is supplied into the high pressure chamber generated on the web side, the method for depositing the active ingredient according to the invention of claim 1 can be easily carried out. It has the effect of being able to

(Embodiment) A preferred embodiment of the present invention will be described with reference to FIGS. 1 to 7. FIGS. 1 and 2 show the first embodiment of the present invention, and FIG. 3 shows the same embodiment. The apparatus for applying active ingredients to a web according to the second embodiment is shown, and FIGS. 4 to 7 show examples of use of the apparatus for applying active ingredients to the web according to the first embodiment or the second embodiment, respectively. .

The first embodiment shown in FIGS. 1 and 2 and the second embodiment shown in FIG.
Each active ingredient deposition device Z1 of the example. Zt is, for example, tissue paper, toilet paper, towel paper,
It is used to attach active ingredients such as chemicals, perfumes, oils and fats depending on the purpose to the web before producing products made of breathable webs such as table napkins and wipers. In addition, the active ingredient deposition devices 2, 2, of each of these embodiments are used by being incorporated in the middle of the manufacturing process of various web products, as will be described later, and are used to sequentially and continuously apply the ingredients to a continuously running long web. It is configured to deposit an active ingredient such as a gas mixture.

Active ingredient deposition device 2 of the first embodiment shown in FIGS. 1 and 2. corresponds to claim 2 of the present invention, and this active ingredient deposition device 2. is a differential pressure between the web supporting device 1 that supports the running web W in a running state and the chambers 28 and 29 provided on each side of the web W supported in a stretched state by the web supporting device 1. A differential pressure generator 2 that generates
The basic configuration includes a component misting device 3 for making mist.

The web support device 1 has a large number of ventilation holes 12, 12 on the entire circumference.
. . . A hollow rotating cylinder (snap/yon cylinder) 11 and two presser rolls + 3.13 for bringing the web W into close contact with the outer peripheral surface of the rotating cylinder 11 over a predetermined angular range. are doing. Two presser rolls 13.
13 are placed close to or lightly in contact with the outer circumferential surface of the rotary cylinder 11 with a predetermined distance between them (for example, about 300 degrees apart from the center of the rotary cylinder 11), as shown in FIG. The rotating cylinder 11 has shaft portions 11a and lla at both ends supported by bearings 14 and 14, respectively. Further, a distal end 15b of a rocking arm 15 whose proximal end 15a is pivotally supported on a base 16 as shown in FIG. 2 is connected to each of the bearings 14,14.

The rotary cylinder 11 can be lifted upward by rotating the rocking arm 15 upward, and the paper can be passed by
This can be done through gaps formed between the rotating cylinder 11 and each presser roll 13, 13.

Moreover, this rotating cylinder 11 and each presser roll 13.13
is driven at a speed equal to the web running speed by a drive device 17 that is linked to a web running drive mechanism (such as the wafer feeding device 7 in FIG. 4).

The differential pressure generating device 2 operates within the space between the two presser rolls + 3.13 on the lower surface side of the rotary cylinder 11 so that the outer surface of the rotary cylinder 11 has a high pressure and the inner surface of the rotary cylinder 11 has a negative pressure. In this embodiment, a series of substantially sealed passages are formed inside and outside the rotary cylinder 11, and the air in the passages is circulated by the blower 21. It is configured. That is, on the outside of the area partitioned by the two presser rolls l3.13 on the lower surface side of the rotating cylinder 11,
An external compartment 26 is formed, which is opened only in the portion facing the outer surface of the rotary cylinder and is partitioned in a state of being almost shut off from the outside.On the other hand, the inside of the rotary cylinder 11 is partitioned by the two presser rolls 13, 13. An internal compartment 27 is formed, which is open only in a portion facing the area and is partitioned in a state of being substantially cut off from the outside (inside the rotating cylinder). An external compartment 26 formed on the outside of the rotary cylinder 11 is connected to a blow-off side passage 24 that communicates with the blow-off port 22 of the blower 21, and an internal compartment 27 formed inside the rotary cylinder 11 is connected to A suction side passage 25 communicating with the suction port 23 of the blower 21 is connected.

A bendable bellows pipe 25a is used on the blower connection side of the suction side passage 25, and a branch pipe 25b whose tip end is branched into two,
25b. Each branch pipe 25b, 25b is
The left and right shaft portions 11a and lla of the rotating cylinder 11, respectively.
The left and right side walls 27a, 27a of the internal compartment 27 are opened into the internal compartment 27 by passing through the bearings 14, 14.

In this differential pressure generating device 2, when the blower 21 is operated, air flows from the outlet 22 to the outlet side passage 24, the external compartment 26, the ventilation hole 12 of the rotary cylinder 11, the internal compartment 27, and the suction side passage. 25 and returns to the blower suction port 23, so that the air is continuously circulated in a closed passage in a substantially sealed state.

Since the web W is interposed between the external compartment 26 and the outer peripheral surface of the rotary cylinder 11, when the blower 21 is operated, the air in the blow-off side passage 24 and the external compartment 26 is compressed. This becomes the high pressure chamber 28, and conversely, the air in the suction side passage 25 and the internal compartment 27 is sucked in and becomes the negative pressure chamber 29. By the way, since this active ingredient deposition device employs a web W having air permeability, when a pressure difference occurs in the chambers 28 and 29 on each side of the web W, the pressure difference causes the fibers of the web W to Through this, air flows from the high pressure chamber 2B side to the negative pressure chamber 29 side.

The component mist forming device 3 is configured to use high pressure air from a compressor 33 to turn liquid components X such as chemicals, fragrances, oils and fats contained in a tank 31 into a mist. That is, the inside of the tank 31 and the nozzle 35 are connected to the liquid pumping pipe 32.
and connect the compressor 33 and nozzle 35 with an air pipe 34, and use high pressure air from the compressor 33 to pump up the liquid component I'm starting to get it. The nozzle 35 of the component mist forming device 3 is opened toward the inside of the high pressure chamber 28 of the differential pressure generating device 2.
The mist ejected from the nozzle 35 into the high pressure chamber 28 mixes with the air blown from the blower 21, and the mist mixture Y3 circulates within the open passage of the differential pressure generator 2.

The active ingredient adhesion device Z for the web of this first embodiment,
For example, as shown in FIGS. 4 to 7, the web product is used by being incorporated in the process of manufacturing various web products. Before explaining the action of the active ingredient adhering device Z1 on the web of this first embodiment, each of the manufacturing devices shown in FIGS. 4 to 7 will be briefly explained. First, the manufacturing apparatus shown in FIG. 4 uses web feeding devices 7, 7 to pull out flu webs W, W from two base paper rolls A, A each having a single web W wound thereon, and then pulls out the flu webs W, W, respectively, from two base paper rolls A, A each having a single web W wound thereon. W,
This is for stacking two sheets of W (symbol W2) and winding them into a roll (symbol B). In the usage example shown in FIG. 4, there are two active ingredient deposition devices 2, 2.

is used, and each single web W, W unwound from each base paper roll A, A is passed through each active ingredient adhering device 2, 2, respectively, before being made into two sheets. The manufacturing device shown in FIG. 5 relates to a paper machine, in which a web W in a dry state after a drying process by a paper making section C and a dryer D is passed through an active ingredient adhering device Z1 before being wound up as a base paper roll E. That's what I do. The manufacturing apparatus shown in FIG. 6 is related to a folding machine, and after passing each web W, W pulled out from two base paper rolls A, A through an active ingredient adhering device z I+ z, a folding section F I try to fold it in a zigzag pattern. The manufacturing device shown in FIG. 7 is related to a log manufacturing machine, and after passing the web W pulled out from the base paper roll 8 through the active ingredient deposition device Z1, it is wound into a thin roll [4] in the log winding section G. I try to take it.

Active ingredient adhesion device Z1 for the web of this first embodiment
As shown in the above usage examples, the active ingredient can be sequentially attached to the air-permeable web W while the web W is continuously running. That is, this active ingredient deposition device ZI is driven in conjunction with the main body of the manufacturing device in a state where the web W is pushed through between the rotating cylinder 11 and the presser roll 13°13, and at that time, the differential pressure generating device 2 and component misting device 3 are also operated at the same time.

When the blower 21 of the differential pressure generating device 2 is operated, the lower surface side of the web W supported on the outer surface of the rotary cylinder 11 becomes a high pressure chamber 28, and the upper surface side of the web W becomes a negative pressure chamber 29, so that the air becomes under high pressure. It flows from the chamber 28 side to the negative pressure chamber 29 side through the fibers of the web W. Furthermore, when the compressor 33 of the ingredient mist forming device 3 is operated, the liquid ingredients x1 such as chemicals, fragrances, oils and fats are made into a mist and ejected from the nozzle 35 into the high pressure chamber 28, and furthermore, the high agricultural The high-humidity mist mixture gas is mixed with pressurized air supplied from the blower 21 to be uniformly diluted, and the humidity is also reduced. The mist mixture Y in the high pressure chamber 28 passes through the fibers of the continuously running web W and flows toward the negative pressure chamber 29 due to the differential pressure generated between the front and back sides of the web W. Then, it is further sucked into the blower 21 and discharged into the high pressure chamber 28 again.

When the mist gas mixture Y1 passes from the high pressure chamber 28 side to the negative pressure chamber 29 side with the web W as a boundary, the active ingredients in the mist gas mixture Y1 become attached to the fibers of the web W due to the filter effect. Further, since the web W is continuously running and the blower 21 is also continuously operated, the active ingredient is continuously deposited on the web W passing through the web support device 1 portion. Furthermore, since the mist gas mixture Y1 passing through the web W has a relatively low humidity, there is no adverse effect on the web W due to wetting, and therefore the wet strength is lower than that of, for example, toilet 7h paper. Even when using a small web W, it is possible to operate without any trouble.In addition, in this way, the active ingredients in the mist gas mixture are attached to the web W by the filter effect. Therefore, even when a very small amount of active ingredient is attached to the web W,
It can be made to adhere uniformly to the entire surface of the web W.

In addition, in this first embodiment, since the differential pressure generating device 2 is constructed in the form of a substantially closed path, the active ingredients in the mist mixture Y that did not adhere to the web when it passed through the web W are returned to the high pressure chamber. It can be supplied to the 2B side, eliminating waste of active ingredients.

In this first embodiment, air is circulated by a single blower 21 as the differential pressure generating device 2, but in other embodiments, pressurized air is supplied to the high pressure chamber 28 side. It is also possible to use separate blowers for air suction and air suction from the negative pressure chamber 29 side. In addition, in this first embodiment, the active ingredient is deposited while the web W is continuously running, but when the idea of the present application is applied to a web W of a regular size, for example, the web is moved to a regular size. It can also be done while stopped at a certain position. In that case, it goes without saying that it is necessary to change the configuration of the web support device 1 to be applicable thereto. In addition, the running speed of the web W and the high pressure chamber 28 may vary depending on the type of liquid component xl used, the purpose of the manufactured product, the quality of the web, the amount of the active ingredient to be deposited, etc.
It is also beneficial to be able to adjust the concentration of the mist mixture Y generated within the web W, the magnitude of the differential pressure generated on each side of the web W, etc. as appropriate.

The active ingredient adhering device Z for a web according to the second embodiment shown in FIG. 3 corresponds to the invention of claim 3 of the present application. The active ingredient deposition device Z for the web according to the second embodiment is obtained by replacing the component misting device in the active component deposition device Z1 of the first embodiment with a component vaporization device 6.
The other configurations are the same as those of the first embodiment. The component vaporization device 6 of the active component deposition device Z of this second embodiment is as follows:
Powder or solid component X such as chemicals, fragrances, oils and fats can be vaporized by heating with a heating device 61 such as an electric heater. The vaporized components vaporized by the component vaporization device 6 are supplied into the high pressure chamber 28 as a vaporized component mixed gas Y2, and are circulated in the closed passage of the differential pressure generation device 2 as in the case of the first embodiment. As a result, the active ingredients in the vaporized component mixture Y gradually adhere to the running web W. Active ingredient deposition device 2 of this second embodiment. Since the active ingredients in the component gas mixture are in a dry state, the vaporized component gas mixture Y,
It is thought that the adhesion effect of the active ingredient when it passes through the web W is slightly lower than in the case of a mist mixed gas, but
Since the web W does not absorb moisture due to the component mixed gas, there is an advantage that no problem will occur even if it is applied to a web with extremely low wet strength.

The method for attaching an active ingredient to a web according to claim 1 of the present application is the active ingredient attaching device Z of the first embodiment or the active ingredient attaching device 2 of the second embodiment. The method for applying the active ingredient is as already explained in each example section.

[Brief explanation of drawings]

FIG. 1 is a central longitudinal cross-sectional view of an apparatus for applying an active ingredient to a web according to a first embodiment of the present invention, and FIG.
-■ sectional view, FIG. 3 is a central vertical cross-sectional view of the active ingredient adhesion device for a web according to the second embodiment of the present invention, and FIGS. 4 to 7 respectively incorporate the active ingredient adhesion device of FIG. 1. 1 is a diagram illustrating various web product manufacturing devices. l... Web support device 2... Differential pressure generator 3... Component mist generator 6... Component vaporizer 11... Rotating cylinder 12... Ventilation hole 21...Blower 28...High pressure chamber 29...Negative positive chamber X, ...Liquid component X, ...Powder or solid component Y, ...Mist mixed gas Y, ... vaporized component mixed gas

Claims (1)

[Scope of Claims] 1. A pressure difference sufficient to allow gas to flow through the fibers of the web is generated between the front and back sides of a breathable web supported in a stretched state, and chemical agents, fragrances, oils and fats, etc. A mist or a component gas mixture containing vaporized components is passed from one side of the web to the other side using the differential pressure, so that the active ingredients in the component gas mixture are attached to the web. A method for attaching an active ingredient to a breathable web, characterized by: 2. A web support device (1) that supports a breathable web (W) in a stretched state, and each chamber (
28, 29), a differential pressure generating device (2) that generates a differential pressure sufficient to allow gas to flow through the fibers of the web (W), and a liquid component (X_
1), and the mist mixture gas (Y_1) generated by the component mist forming device (3) is converted into a high pressure generated by the differential pressure generating device (2). An apparatus for applying an active ingredient to a breathable web, characterized in that it is configured to be supplied into a chamber (28). 3. A web support device (1) that supports a breathable web (W) in a stretched state, and each chamber (
28, 29) a differential pressure generating device (2) that generates a differential pressure sufficient to allow gas to flow through the fibers of the web (W), and a differential pressure generating device (2) that heats and vaporizes components such as chemicals, fragrances, oils and fats. a component vaporizer (6), and a vaporized component mixed gas (Y) generated in the component vaporizer (6).
_2) into the high pressure chamber (
28) An apparatus for applying an active ingredient to a breathable web, characterized in that it is configured to supply an active ingredient to a web having air permeability.