JP6542595B2 - Cleaning tool - Google Patents

Description

  The present invention relates to a cleaning tool configured by bonding a non-woven sheet made of a plastic synthetic resin fiber to the outer surface of an elastic base.

  Conventionally, as a cleaning tool of this type, a non-woven sheet produced by interlacing fibers with a web formed by arranging synthetic resin fibers randomly and laminating them with a needle punch etc. is a sponge etc. The surface of the non-woven sheet is rubbed by bonding to the outer surface of the elastic base material by an adhesive or heat fusion, etc., and the cleaning object such as dishes, cooking utensils, wash basins, toilets, baths etc. A cleaning tool used for cleaning is known (see, for example, Patent Document 1).

JP, 2008-099914, A

  As described above, in the cleaning tool having the surface of the non-woven fabric sheet as the cleaning surface, the surface of the non-woven fabric sheet is shrunk by being rubbed against the object to be cleaned or hooked on the tip of a sharp edge or fork. Damage such as fuzzing progresses, leading to a problem of shortening the life.

  As a method of suppressing the damage accompanying use of such a nonwoven fabric sheet, the heating process which heats the whole by blowing hot air etc., such as combustion gas, to the said nonwoven fabric sheet concerned is performed, and synthetic resin fibers are heat-sealed. There is a way to combine.

  However, when the entire nonwoven fabric sheet is subjected to heat treatment, a molten portion in which a part of synthetic resin fibers is melted is formed in the entire nonwoven fabric sheet, and the flexibility of the nonwoven fabric sheet is impaired. As a result, the feeling in use decreases, and when adhering to the elastic base material, it is difficult to conform to the outer surface of the elastic base material, which may cause adhesion failure.

  Furthermore, when the whole nonwoven fabric sheet is subjected to heat treatment, the back surface of the nonwoven fabric sheet bonded to the elastic substrate becomes flat with few voids, so that the adhesive and the like hardly penetrate and the adhesiveness to the elastic substrate is improved. As a result, the non-woven fabric sheet is easily peeled off from the elastic substrate, which results in shortening of the service life.

  In order to improve such adhesion failure and adhesion deterioration, it is conceivable to make the bonding method itself strong, but by applying strong bonding, the bonding portion is formed as a relatively hard boundary surface. As a result, the entire cleaning tool becomes cluttered, causing a problem that the feeling in use is reduced.

  In view of this situation, the main object of the present invention is a cleaning tool configured by bonding a non-woven sheet composed of a plastic synthetic resin fiber to the outer surface of an elastic base, to the elastic base of the non-woven sheet It is an object of the present invention to provide a cleaning tool capable of suppressing damage such as shrinkage and fuzzing caused by the use of the surface of the non-woven fabric sheet while avoiding the decrease in adhesion and the decrease in feeling in use.

A first feature of the present invention is a cleaning tool constructed by bonding a non-woven sheet composed of a plastic synthetic resin fiber to the outer surface of an elastic base,
The surface of the non-woven fabric sheet is a molten portion forming surface on which a molten portion formed by melting a part of the synthetic resin fiber is formed,
The back surface of the non-woven fabric sheet is a non-melted surface to be bonded to the elastic base material ,
The fused portion forming surface and the fused portion non-formed surface are formed by radiation heat treatment in which radiant heat is irradiated from the surface side to the nonwoven fabric sheet before being bonded to the elastic base material,
The shrinkage width of the thickness after heating relative to that before heating of the non-woven fabric sheet in the radiation heat treatment is set within a range of 0.1 mm to 2.0 mm, and the plurality of melted portions are mutually dispersed on the melted portion forming surface It is in the point where it is formed .

  According to this feature configuration, the surface of the non-woven fabric sheet that functions as the cleaning surface to be rubbed against the object to be cleaned during cleaning is the above-mentioned melting portion forming surface, so the melting portion forming surface is rubbed to be cleaned At the time of cleaning the object, the relatively hard melted portion is rubbed against the object to be cleaned to improve the polishing power, and the fibers are appropriately connected by the melted portion, which causes shrinkage due to use. In addition, damage such as fuzzing can be suppressed, and life extension can be realized.

  On the other hand, since the back surface of the non-woven fabric sheet bonded to the elastic base is a fused portion non-formed surface which is maintained in a state in which the synthetic resin fibers are closely entangled without forming the fused portion The decrease in flexibility due to the formation of the molten part of Furthermore, the penetration of the adhesive or the like to the surface on which the molten portion is not formed becomes good, and the adhesion to the elastic substrate becomes strong and uniform. Therefore, peeling of the nonwoven fabric sheet with respect to an elastic base material can be suppressed, applying simple adhesion and securing the pliability of the adhesion part.

Therefore, according to the present invention, a cleaning tool capable of suppressing damage such as shrinkage and fuzzing with use of the surface of the non-woven sheet while avoiding the decrease in the adhesiveness and the feeling of use of the non-woven sheet to the elastic substrate. Can be provided.
Furthermore, according to the present feature configuration, the non-woven fabric sheet has a simple configuration in which a radiant heat treatment is performed from the surface side to irradiate radiant heat with a far-infrared heater or the like before being bonded to the elastic substrate. While forming a fusion | melting part in the surface and making it a fusion | melting part formation surface, formation of a fusion | melting part can be prevented and a fusion | melting part non-formation surface can be made in a back surface.
Furthermore, when the surface side of the non-woven sheet is heated in the radiation heat treatment, the synthetic resin fibers on the surface side are melted and shrunk, whereby the thickness of the non-woven sheet shrinks. In short, it can be said that the larger the shrinkage width of the thickness after heating of the non-woven fabric sheet before heating in the radiant heat treatment, the larger the ratio of the molten part in the molten part forming surface.
Therefore, according to the present feature configuration, the heating condition and the like in the radiant heat treatment are set so that the shrinkage width of the thickness of the non-woven fabric sheet after heating is within the range of 0.1 mm to 2.0 mm. Therefore, the molten portion can be dispersedly formed on the molten portion forming surface to such an extent that damage such as shrinkage and fuzzing with use can be suitably suppressed while suppressing the stiffness and the permeability decrease of the molten portion forming surface.

  According to a second aspect of the present invention, in the cleaning tool having the first aspect, the thickness of the non-woven fabric sheet is in the range of 1 mm to 3 mm.

In the conventional cleaning tool, the thickness of the non-woven fabric sheet is relatively thick, for example, about 5 mm, in order to compensate for damage such as shrinkage and fuzzing with use.
However, according to the present feature configuration, since the damage caused by the use of the surface of the non-woven fabric sheet can be suppressed, the thickness of the non-woven fabric sheet can be made relatively thin within the range of 3 mm or less. In addition to the cost reduction, it is possible to improve the flexibility by thinning the nonwoven sheet which is relatively fragile. Furthermore, in order to ensure the durability of the non-woven fabric sheet itself to an extent that normally withstands use, the thickness of the non-woven fabric sheet is desirably 1 mm or more.

  According to a third aspect of the present invention, in the cleaning tool having the first or second aspect, the thickness of the molten portion forming layer in which the molten portion is formed on the molten portion forming surface is 0.01 mm to 0.. The point is within the range of 20 mm.

According to this feature configuration, since the thickness of the molten portion forming layer is in the range of 0.01 mm to 0.20 mm, the shrinkage and fuzz associated with use are suppressed while suppressing the stiffness and the permeability decrease of the molten portion forming layer. And the like can be suitably suppressed.
That is, when the thickness of the melt portion forming layer is less than 0.01 mm, the formation of the melt portion for bonding the fibers becomes insufficient, and as a result, the effect of suppressing damage such as shrinkage and fuzzing with use You will not be able to fully enjoy it.
On the contrary, when the thickness of the above-mentioned fusion zone formation layer exceeds 0.20 mm, the ratio which the fusion zone occupies in the fusion zone formation layer becomes too large, as a result, stiffness and the permeability decrease of fusion zone formation layer It becomes a problem.

According to a fourth characterizing feature of the present invention, in the cleaning tool having any of the first to third characterizing features, the non-woven fabric sheet is composed of a single synthetic resin fiber .

According to a fifth aspect of the present invention, in the cleaning tool having the fourth aspect, the non-woven fabric sheet is made of polyester fibers,
As heating conditions in the radiation type heat treatment, the heating temperature is set in the range of 300 ° C. to 500 ° C., and the heating time is set in the range of 1 second to 15 seconds.

  According to this feature configuration, the radiation type heating is performed on the surface side of the non-woven fabric sheet made of polyester fibers having a melting point of about 255 ° C. to 265 ° C. under the preferable heating conditions of the above heating temperature and heating time. By performing the treatment, it is possible to suitably suppress the influence of radiant heat on the surface on which the molten portion is not formed, and to ensure the adhesion of the surface on which the molten portion is not formed to the elastic base material while contracting with use. The fused portion can be dispersedly formed on the fused portion forming surface to such an extent that damage such as fuzzing can be suitably suppressed.

That is, it is desirable to set the heating temperature in the radiant heat treatment to obtain the above effects within the range of 300 ° C. to 500 ° C. Further, the radiant heat treatment to obtain the above effects It is desirable to set the heating time in the range of 1 second to 15 seconds.
When the heating temperature is less than 300 ° C., or when the heating time is less than 1 second, it is not possible to sufficiently melt the polyester fibers of the fusion portion forming surface, and a fusion portion for bonding the fibers As a result, it is impossible to fully enjoy the effect of suppressing damage such as shrinkage and fuzzing accompanying use.
Conversely, if the heating temperature exceeds 500 ° C., or if the heating time exceeds 15 seconds, the effect of radiant heat on the surface on which the molten portion is not formed becomes a problem, and the polyester fiber on the surface on which the molten portion is formed The melting progresses, and the ratio of the molten portion in the molten portion forming surface becomes too large, and as a result, the stiffness of the molten portion forming surface and the decrease in water permeability become problems.

Surface side perspective view of the cleaning tool of the present embodiment Cross-sectional schematic view of the cleaning tool of the present embodiment Cross-sectional enlarged photograph of the non-woven fabric sheet used for the cleaning tool of the present embodiment Enlarged picture of the melt formation surface Enlarged picture of the non-melted surface Diagram to explain radiation heat treatment Surface side perspective view of cleaning tool of another embodiment

An embodiment of the present invention will be described based on the drawings.
As shown in FIGS. 1 and 2, the cleaning tool 10 of the present embodiment is formed in a rectangular parallelepiped shape having a width of about 120 mm, a width of about 60 mm, and a thickness of about 30 mm. The nonwoven fabric layer 11 of about 2 mm, the support layer 12 of about 10 mm in thickness, and the sponge layer 13 of about 18 mm in thickness are adhered to each other and have a triple-layered structure. The surface of the non-woven fabric layer 11 opposite to the support layer 12 (the upper surface of the cleaning tool 10 in FIG. 2) and the surface of the sponge layer 13 opposite to the support layer 12 (the cleaning tool 10 in FIG. The lower surface functions as a cleaning surface to be rubbed against the object to be cleaned when cleaning the object to be cleaned such as dishes, cookware, a wash basin, a toilet, a bath and the like.

The support layer 12 is made of urethane foam having higher resilience than the sponge layer 13 described later, and by providing such a support layer 12, the elasticity and shape retention of the entire cleaning tool 10 can be improved. It has been improved.
In the present embodiment, the support layer 12 functions as an elastic base material B to which a non-woven fabric sheet A described later is adhered to the outer surface.

  The sponge layer 13 is made of a flexible urethane foam having fine open cells and having lower impact resilience than the support layer 12 and is provided with such a sponge layer 13. Suction and drainage of water and flexibility are secured.

  The non-woven fabric layer 11 is composed of a non-woven fabric sheet A composed of polyester fibers that are plastic synthetic resin fibers, and this non-woven fabric sheet A is the sponge layer 13 side of the support layer 12 functioning as the elastic base material B It is glued to the opposite side.

  In addition, although each layer in the cleaning tool 10 of the present embodiment, in particular, the nonwoven fabric sheet A and the elastic base material B, is adhered by applying an adhesive to the interface between each other, for example, another adhesion such as heat fusion You may adhere by a method.

  The above is the basic configuration of the cleaning tool 10. Furthermore, the cleaning tool 10 of the present embodiment suppresses shrinkage and fuzz associated with the use of the surface of the non-woven fabric sheet A while realizing excellent usability and long life. And the details thereof will be described below.

  The surface of the nonwoven fabric sheet A located on the upper surface in the cross-sectional photograph of the nonwoven fabric sheet A in FIG. 3 is formed with a melted portion M in which a part of the polyester fibers is melted as shown in the photograph in FIG. It is set as the fusion zone formation face Af. As a result, the melted portion forming surface Af of the non-woven fabric sheet A, which becomes the cleaning surface to be rubbed against the object to be cleaned, rubs the relatively hard melted portion M on the object to be cleaned Therefore, the polishing force is improved, and the fibers are appropriately connected by the melting portion M, whereby shrinkage and fuzzing with use are suppressed and a long life is achieved.

  On the other hand, the back surface of the nonwoven fabric sheet A located on the lower surface in the cross-sectional photograph of the nonwoven fabric sheet A of FIG. 3 is a molten portion where the above-mentioned fusion portion M is not formed as shown in the photograph of FIG. The non-forming surface Ab is bonded to the elastic base material B (see FIG. 2). By this, the penetration of the adhesive or the like to the molten-portion non-forming surface Ab becomes good, and the adhesion to the elastic base B becomes strong and uniform. Therefore, peeling of the nonwoven fabric sheet A with respect to the elastic base material B is suppressed, applying simple adhesion and ensuring the softness of the adhesion part.

Such a fused part forming surface Af and a fused part non-formed surface Ab are formed by performing a radiant heat treatment of irradiating radiant heat from the surface side to the nonwoven fabric sheet A before being bonded to the elastic base material B. Ru.
Hereinafter, the manufacturing method of the nonwoven fabric sheet A including the radiation type heat treatment will be described based on FIG.

First, the web W made of polyester fibers and manufactured by a known method such as a dry method or a wet method is treated with the needle punch 110 to produce a non-woven sheet A 'in a state in which the polyester fibers are densely entangled. .
In the present embodiment, although not shown in detail, the web W is a stack of 28 slivers of polyester fiber having a thickness of about 5 mm and treated with a card. By processing, about 2.7 mm in thickness non-woven sheet A 'is manufactured.

  A radiation type heating device 120 for performing the radiation type heat treatment is disposed on the upper surface side of the conveyor 140 which conveys the nonwoven fabric sheet A ′, and the radiation type heating device 120 is conveyed by the conveyor 140. The infrared heater 120a is provided in the state which can irradiate radiant heat from the position left | separated about 3 cm-4 cm with respect to the surface side among front and back of non-woven fabric sheet A '.

  In addition, the non-woven fabric sheet A after passing through the lower side of the radiant heating device 120 and being irradiated with radiant heat only on the surface side is cooled down to such an extent that the polyester fiber melted by the radiant heat is cured. It is taken up by the device 130 and conveyed to the next step.

  Thus, the surface of the non-woven fabric sheet A after passing under the radiant heating device 120 is a fused part forming surface Af on which a fused part M is formed by melting and cooling part of the polyester fiber after radiant heat The molten portion forming surface Af is used as a cleaning surface to be rubbed against the object to be cleaned.

  On the other hand, the back surface of the non-woven fabric sheet A after passing under the radiant heating device 120 is less affected by the radiant heat radiated from the radiant heating device 120 to the front side, so melting of the polyester fiber is prevented and melted. It becomes a fusion part non-formation surface Ab maintained in a state where polyester fibers are tightly intertwined without forming a part M, and this fusion part non-formation surface Ab becomes an adhesive surface to be adhered to the elastic base material B.

  Furthermore, the melting portion M is formed on the melting portion forming surface Af to such an extent that damage such as shrinkage and fuzzing of the melting portion forming surface Af can be suitably suppressed while suitably suppressing the influence of radiant heat on the melting portion non-forming surface Ab. In order to disperse and form, radiation heat treatment is applied to the surface side of the nonwoven fabric sheet A under suitable heating temperature conditions and heating time conditions.

  Specifically, the integration time during which radiant heat is irradiated while an arbitrary position on the surface side of the nonwoven fabric sheet A ′ passes below the radiant heating device 120 is a heating time, and the heating time is 1 second to The transport speed of the conveyor 140 is adjusted to be set in the range of 15 seconds, preferably in the range of 8 to 10 seconds. In addition, about this heating time, it can adjust suitably so that the state of fusion part non-formation side Ab of nonwoven fabric sheet A after heating and fusion part formation side Af will be in a desired state.

  Furthermore, after setting the transport speed of the conveyor 140, the maximum temperature of the surface of the nonwoven fabric sheet A 'while passing under the radiant heating device 120 is taken as the heating temperature, and the heating temperature is the melting point of the polyester fiber The output of the radiation-type heating device 120 and the distance from the surface of the nonwoven fabric sheet A ′ are adjusted so as to be set in the range of 300 ° C. to 500 ° C. exceeding (about 255 ° C. to 265 ° C.). Specifically, in the present embodiment, the heating temperature is set to about 400.degree.

  Then, when the radiation type heat treatment is applied to the non-woven fabric sheet A ′ having a thickness of about 2.7 mm under the above heating conditions, the polyester fibers on the surface side thereof are melted and shrunk. The thickness of the nonwoven fabric sheet A shrinks to about 2.0 mm. As a result, the melt portion M is appropriately dispersed and formed on the melt portion forming surface Af, and while the stiffness and the decrease in permeability are suppressed, damage such as shrinkage and fuzzing with use is suitably suppressed. The contraction width is desirably in the range of 0.1 mm to 2.0 mm, preferably in the range of 0.3 mm to 1.5 mm, and more preferably in the range of 0.5 mm to 1.0 mm.

By setting the heating conditions such as the heating time and heating temperature in the radiation type heating device 120 as described above, in the non-woven sheet A after heating, the surface side appropriately melts the polyester fibers so that the fibers are separated. It becomes fusion part formation surface Af in which fusion part M was formed in order to combine with and to suppress stiffness and a fall in water permeability, and on the other hand, the back side is polyester without such fusion part M being formed. It becomes the fusion part non-formation surface Ab which is maintained in a state in which the fibers are closely entangled.
In addition, various conditions of such radiation type heat treatment form the fusion zone M on the surface of the nonwoven fabric sheet A to form the fusion zone forming surface Af, and prevent the formation of the fusion zone M on the back side. In the range which can be set as the fusion part non-formation side Ab, it may change suitably.

Referring to the cross-sectional photograph of the non-woven fabric sheet A in FIG. 3, in the non-woven fabric sheet A of this embodiment, the fusion zone M extends not only to the fusion-portion-formed surface Af on the front side but also to the boundary X on the inner side slightly It can be confirmed that it is formed also in the depth portion of
Then, the melting portion in which the melting portion M is formed on the melting portion forming surface Af is for the purpose of suppressing the stiffness and the permeability decrease of the melting portion forming layer Lx and suitably suppressing the damage such as shrinkage and fuzzing with use. The thickness of the formed layer (a layer from the melt portion formed surface Af to the boundary surface X) Lx is in the range of 0.01 mm to 0.20 mm, preferably in the range of 0.03 mm to 0.15 mm, more preferably 0. A range of 05 mm to 0.10 mm is desirable. In the present embodiment, the thickness of the molten portion forming layer Lx is 0.07 mm. The thickness of the molten portion forming layer Lx corresponds to the thickness of about one sliver constituting the nonwoven fabric sheet A.

  From this, in the cleaning tool 10 of this embodiment, the thickness of the non-woven fabric sheet A is 2 mm, but if the thickness of the non-woven fabric sheet A is about 1 mm or more, preferably 1.5 mm or more, which is about half that of this embodiment. And it turns out that the back surface of nonwoven fabric sheet A can be made into fusion part non-formation side Ab in which fusion part M is not formed.

  In addition, regarding the thickness of such non-woven fabric sheet A, the non-woven fabric sheet A having a thickness of 5 mm or more, which is conventional, is suppressed by suppressing damage such as shrinkage and fuzzing with use of the surface of non-woven fabric sheet A It is not necessary to do this, and it can be made relatively thin such as 3 mm or less, preferably 2.5 mm or less.

  In addition, the thickness of the nonwoven fabric sheet A is a range in which the molten portion M is formed on the surface to form the molten portion forming surface Af, and the formation of the molten portion M is prevented on the back surface to form the molten portion non-forming surface Ab. You may change suitably inside.

  Further, the surface of the non-woven fabric sheet A is a molten portion-forming surface Af on which the melting portion M is formed sufficiently to suppress damage such as shrinkage and fuzzing with use, and the back surface of the non-woven fabric sheet A is an elastic base Even if the position of the interface X is displaced to the side of the non-molten area forming surface Ab within the range where the non-molten area forming surface Ab secures the adhesion to the material B, for example, I do not care.

[Another embodiment]
Although the support layer 12 is provided on the cleaning tool 10 and the support layer 12 is used as the elastic base material B in the above embodiment, the non-woven fabric sheet A is adhered to the elastic base material B. As shown, such a support layer 12 may be omitted.

  That is, the cleaning tool 20 of another embodiment shown in FIG. 7 includes, in order from one surface side, a non-woven fabric layer 21 having a thickness of about 2 mm and made of non-woven fabric sheet A made of polyester fibers which are plastic synthetic resin fibers. The sponge layer 22 having fine open cells and composed of a flexible urethane foam and having a thickness of about 17 mm has a double structure in which the sponge layer 22 is adhered and laminated to each other by an adhesive or heat fusion.

  In the cleaning tool 20 of such another embodiment, the opposite side to the sponge layer 22 side of the non-woven fabric layer 21 (upper surface of the cleaning tool 20 in FIG. 7) and the opposite side to the non-woven fabric layer 21 side of the sponge layer 22 When the object (the lower surface of the cleaning tool 20 in FIG. 7) of the present invention is used to clean an object to be cleaned such as dishes, it functions as a cleaning surface to be rubbed against the object to be cleaned.

  The surface of the non-woven fabric sheet A constituting the non-woven fabric layer 21 is a melting portion forming surface Af (see FIG. 4) where the melting portion M is formed, and the back surface of the non-woven fabric sheet A is formed with the melting portion M. The non-melted portion non-forming surface Ab (see FIG. 5) is adhered to the sponge layer 22 functioning as the elastic base B by an adhesive or heat fusion.

DESCRIPTION OF SYMBOLS 10 Cleaning tool 20 Cleaning tool 120 Radiation type heating apparatus A Non-woven fabric sheet Ab Melt part non-formation surface Af Melt part formation surface B Elastic base material M Melt part

Claims (5)

A cleaning tool constructed by bonding a non-woven sheet composed of a plastic synthetic resin fiber to the outer surface of an elastic base material,
The surface of the non-woven fabric sheet is a molten portion forming surface on which a molten portion formed by melting a part of the synthetic resin fiber is formed,
The back surface of the non-woven fabric sheet is a non-melted surface to be bonded to the elastic base material ,
The fused portion forming surface and the fused portion non-formed surface are formed by radiation heat treatment in which radiant heat is irradiated from the surface side to the nonwoven fabric sheet before being bonded to the elastic base material,
The shrinkage width of the thickness after heating relative to that before heating of the non-woven fabric sheet in the radiation heat treatment is set within a range of 0.1 mm to 2.0 mm, and the plurality of melted portions are mutually dispersed on the melted portion forming surface Cleaning tool being formed .   The cleaning tool according to claim 1, wherein a thickness of the non-woven fabric sheet is in a range of 1 mm or more and 3 mm or less.   The cleaning tool according to claim 1 or 2, wherein the thickness of the molten portion forming layer in which the molten portion is formed on the molten portion forming surface is in the range of 0.01 mm to 0.20 mm. The cleaning tool according to any one of claims 1 to 3, wherein the non-woven fabric sheet is composed of a single synthetic resin fiber . The non-woven sheet is made of polyester fibers,
The cleaning tool according to claim 4, wherein a heating temperature is set in a range of 300 ° C to 500 ° C and a heating time is set in a range of 1 second to 15 seconds as heating conditions in the radiation heat treatment.