JPH11197387A - Washing net - Google Patents

Abstract

PROBLEM TO BE SOLVED: To improve the ability to sink into a washing liquid and make shape retentive by composing a specified percentage of fibers forming a netty bag of a high specific gravity core sheath type conjugated fibers having a specified specific gravity in a washing net made of the netty bag having an openable portion from which the washing are put into or taken out. SOLUTION: In a washing net made of a netty bag having an openable portion from which the washing are put in or out in a part thereof, 25 wt.% or more of fibers composing the netty bag is made a high specific gravity core- sheath type conjugated fibers having a specific gravity of 1.45 or higher. In addition, the specific gravity of the netty bag is 1.40 or higher. The core component of the high specific gravity core sheath type conjugated fibers is a synthetic resin containing 25 wt.% or higher specific gravity particles. The high specific gravity particles must be those of one or more picked out from the group consisting of barium, titanium, aluminum, iron, copper, tungsten, titanium dioxide, zinc oxide, barium sulfate and ferric oxide.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bag-like washing net used for storing articles to be washed and washing them with a washing machine. More specifically, the present invention relates to a washing net having a high specific gravity. BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a washing net that has excellent sedimentation properties, has good shape retention properties, is less likely to be twisted by pressing a water flow in a washing tub, and can reduce damage to a laundry.

[0002]

2. Description of the Related Art When washing a lightly-weight laundry to be washed, such as underwear, stockings and thin blouses for women, in which the pain is particularly severe, the laundry is placed in a mesh bag generally called a washing net. They are stored and put into the washing tub of the washing machine.

[0003] However, as the conventional bag-like laundry net in which yarns of natural fibers or synthetic fibers are formed into a net-like shape, many types having various designs have already been proposed. When storing and washing a lightweight laundry, the laundry and the laundry rise up to the surface of the washing liquid due to buoyancy, and the laundry does not sink in the washing liquid, thereby improving the washing efficiency. This requires a long washing time in order to reduce the washing time, and as a result, there is a problem that the laundry is liable to be damaged, such as frays, shape loss and fluff.

[0004] Further, a laundry net containing laundry is
There is also a problem that the laundry is greatly deformed and twisted by the pressing of the washing water flow at the time of washing, which causes damage to the laundry.

In order to solve the above problem, Japanese Patent Publication No.
Japanese Patent No. 24716 proposes a method of reducing the twist and damage of the laundry by applying a synthetic resin coating to the laundry net to impart rigidity to the elastic laundry net. In such a case, the synthetic resin coating falls off due to long-term use and the flexibility of the net itself decreases due to the coating, so that not only can the performance required as a washing net be sufficiently satisfied, but also the complexity of the coating process can be reduced. Therefore, there is a problem that the processing cost is increased.

Further, Japanese Patent Publication No. 6-75633 discloses that
A method has been proposed in which the net is made into a double knitted fabric, and the fiber structure of the front knitted fabric and the back knitted fabric is changed to give the net a strong waist and tension, thereby protecting the laundry. According to the method, not only the sedimentation in the washing liquid and the shape retention of the net at the time of washing cannot be sufficiently satisfied, but also the complicated process of forming the double knitted fabric results in an increase in processing cost.

[0007]

SUMMARY OF THE INVENTION The present invention has been achieved as a result of studying to solve the above-mentioned problems of the conventional laundry net.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a washing machine which has a high specific gravity, has excellent sedimentation in washing liquid, has good shape-retaining properties, is less likely to be twisted by the water flow in the washing tub, and can reduce damage to the laundry. The purpose is to provide a business net.

[0009]

In order to achieve the above object, a laundry net according to the present invention has the following configuration. That is, a high-density core-sheath composite fiber having a specific gravity of 1.45 or more, comprising a mesh-like bag partially having an opening / closing part for taking in / out the laundry, wherein 25% by weight or more of the fibers constituting the mesh-like bag is 1.45% or more. A laundry net characterized by comprising:

In the laundry net of the present invention, 25% by weight or more of the fibers constituting the net-like bag are made of high specific gravity core-sheath composite fibers having a specific gravity of 1.45 or more. If the specific gravity of the high specific gravity core-sheath type composite fiber is less than 1.45, the laundry net cannot be effectively settled into the washing liquid.

[0011] Further, the high specific gravity core-sheath type composite fiber accounts for 25% by weight or more of the fiber constituting the reticulated bag. If the high specific gravity core-sheath type composite fiber is less than 25% by weight of the fiber constituting the net-like bag, the washing net cannot be effectively settled into the washing liquid. If the high specific gravity core-sheath type composite fiber is in a range of 25% by weight or more of the fibers constituting the reticulated bag, the natural fiber and other fibers in a range of less than 75% by weight together with the high specific gravity core-in-sheath type composite fiber. Although it is possible to use a fiber mixed with a synthetic fiber, it is preferable to select a fiber having a specific gravity as high as possible, for example, a polyester fiber.

The washing net of the present invention is made of a high specific gravity net-like bag using a high specific gravity core-sheath type composite fiber having a specific gravity of 1.45 or more as at least a part of constituent fibers. The sedimentation is excellent, the shape retention is good, the water is not easily twisted by the pressing of the water flow in the washing tub, and the damage to the laundry can be remarkably reduced.

The laundry net according to the present invention comprises a net-like bag partially having an opening / closing portion for taking in / out the laundry. If the bag does not have the shape of the bag, the laundry cannot be stored, and it is necessary to have at least one opening / closing part for taking in / out the laundry, and as a means for opening / closing the opening / closing part, Fasteners, magic tapes, buttons and the like can be selected as appropriate.

Further, if the mesh bag does not have a mesh shape, the stored laundry cannot be brought into contact with the washing liquid, and the washing effect cannot be obtained. The shape and size of the mesh in the mesh bag can be appropriately selected according to the size of the laundry and the inflow / flow efficiency of the washing liquid.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the laundry net of the present invention will be described in more detail.

In the laundry net of the present invention,
The specific gravity of the reticulated bag is 1.40 or more, and the high specific gravity core-sheath type composite fiber has a core component of a synthetic resin containing 25% by weight or more of high specific gravity particles. Specific gravity particles are barium, titanium, aluminum,
It is at least one selected from the group consisting of iron, copper, tungsten, titanium dioxide, zinc oxide, barium sulfate and ferric oxide, and constitutes the core component and the sheath component of the high specific gravity core-sheath composite fiber. The synthetic resin is a polyester-based polymer, and the synthetic resin constituting the core component of the high specific gravity core-sheath type conjugate fiber is a low melting point polyester-based polymer, particularly a copolymerized polyester-based polymer, and the synthetic resin constituting the sheath component. Is a polyester polymer having a higher melting point than the core component, and the strength of the reticulated bag is preferably 4.4 g / d or more. By applying these conditions, it is more excellent. The effect can be obtained.

The size of the mesh bag and the number and shape of the opening / closing portions can be appropriately selected depending on the size of the laundry and the storage capacity of the washing tub.

Examples of the form of the high specific gravity core-sheath composite fiber used in the present invention include a pencil-shaped simple core-sheath composite fiber, a sea-island-shaped core-sheath composite fiber, and a core-sheath composite fiber having a non-circular core. But
The pencil-shaped simple core-in-sheath composite type is most preferable from the viewpoints of ease of manufacturing the base and stability of operation.

The specific gravity of the mesh bag is preferably 1.40 or more, more preferably 1.50 or more. If the specific gravity of the mesh bag is not more than 1.40, the sedimentability of the laundry net in the washing liquid, which is the object of the present invention, may not be satisfied.

As a method for increasing the specific gravity of the high specific gravity core-sheath type composite fiber to 1.45 or more, it is preferable that the high specific gravity particles are contained in an amount of 25% by weight or more with respect to the synthetic resin forming the core component. The high specific gravity particles used in are barium,
It is preferably at least one selected from the group consisting of titanium, aluminum, iron, copper, tungsten, titanium dioxide, zinc oxide, barium sulfate and ferric oxide.

If the amount of the high specific gravity particles contained in the synthetic resin forming the core component is 25% by weight or less, the specific gravity of the high specific gravity core-sheath type conjugate fiber may not be able to be 1.45 or more.

If the amount of the high specific gravity particles contained in the core component is less than 25% by weight, the shape retention of the laundry net which is the object of the present invention may not be obtained in some cases. That is, the shape retention of the laundry net is caused by the flexibility of the fibers constituting the net. When the flexibility of the fibers is low, the shape retention of the net is high, and when the flexibility of the fibers is high, There is a tendency that the net becomes flexible and the shape retention becomes low. The content of the high specific gravity particles in the core component has a great effect on the flexibility of the high specific gravity core-sheath composite fiber, and the flexibility increases when the high specific gravity particle content is low, and when the content is less than 25% by weight. In some cases, only high specific gravity core-sheath composite fibers having high flexibility can be obtained.

In the case where the high specific gravity particles are contained in the synthetic resin forming the sheath component as a composite form of the fibers, the particles fall off during use in washing and the particles exposed on the fiber surface come into contact with the laundry. It is not preferable because a trouble such as damage is caused.

The core component synthetic resin and the sheath component synthetic resin of the high specific gravity core-sheath type conjugate fiber constituting the laundry net of the present invention are preferably both made of a polyester polymer, and the core component is a copolymerized polyester polymer. More preferably, it is formed by That is, the copolymerized polyester polymer has a lower melting point than a normal polyester-based polymer, and the higher the copolymerization ratio, the lower the melting point. A core component containing a large amount of high specific gravity particles may form crack-like voids at the interface between the polymer and the high specific gravity particles due to stretching stress in the stretching step, and may lower the specific gravity. Therefore,
By using a polymer with a low melting point as much as possible for the core component, by increasing the flowability of the core component polymer by stretching heat, preventing the formation of crack-like voids, by melting the core component polymer and aggregating it by the surface tension of the void,
The generated crack-like voids are converted into elliptical voids, so that the size of the entire voids can be reduced and the specific gravity can be increased.

The laundry net of the present invention can be dyed in a desired color, and the dyeing conditions can be the same as those of conventional polyester fibers.

Further, a colored laundry net can also be obtained by adding a pigment to the core component polymer and / or the sheath component polymer at the spinning stage to obtain original high specific gravity core / sheath composite fibers.

In producing a mesh bag using the high specific gravity core-sheath composite fiber, ordinary weaving or knitting conditions can be applied, for example, a mesh bag made of Russell knitting or the like is formed.

The laundry net of the present invention must withstand repeated use. For this purpose, it is preferable that the strength of the mesh bag is 4.4 g / d or more.

The method for using the laundry net of the present invention is as follows.
It may be used without being fixed inside the washing tub of the washing machine, or may be used by being fixed inside the washing tub of the washing machine.

[0030]

The present invention will be described below in detail with reference to examples. The physical properties in the examples were measured by the following methods.

[Specific gravity] The specific gravity was measured using a specific gravity bottle.

[Strength] After the sample was left in a temperature control room at 20 ° C. and 65% RT for 24 hours or more, the tensile strength was measured using a Tensilon tensile tester manufactured by Orientec Co., Ltd. at a test length of 25 cm and a take-up speed of 30 cm / min. A -S curve was obtained, and strength and elongation were calculated.

[Sedimentation in Washing Liquid] Twenty women's stockings were stored in a 35 × 35 cm washing net having a zipper opening and closing part, and with a zipper closed, the washing tub had a capacity of 10 liters. When the washing net filled in the washing machine is washed under the condition of washing time 10 minutes × 1 time / rinsing time 5 minutes × 4 times, the sedimentability of the washing net storing the stockings into the washing liquid is evaluated. It was visually evaluated and classified into the following three criteria. …: The sedimentation time is fast and does not rise to the surface of the washing liquid.…: It is difficult to settle, and sometimes rises to the surface of the washing liquid.

[Torsion during Washing (Shape Retention)] At the time of the above-described evaluation of sedimentation, the degree of deformation of the washing net storing the stockings was visually evaluated at the same time, and classified into the following three criteria. ○: hardly twisted and not deformed △: twisted deformation and restoration to the original shape are frequently repeated ×: once twisted and did not return to the original shape.

Examples 1-4 and Comparative Examples 1-3 A polyethylene terephthalate / isophthalate copolymer (PET / I) having an intrinsic viscosity of 0.66 and a copolymerization ratio of isophthalic acid of 10 mol% was prepared. And the dry chips were melt kneaded with a twin screw extruder while adding and mixing sedimentable barium sulfate having an average particle size of 0.7 μm and a specific gravity of 4.13 as high specific gravity particles in the amount shown in Table 1. After that, the mixture was discharged from a die having a diameter of 3.0 mm, cooled, and cut to obtain a polymer chip used as a core component. Further, the core component chip was dried with a rotary vacuum dryer at a temperature of 110 ° C. for 12 hours or more to reduce the moisture content of the chip to 0.004% or less. The intrinsic viscosity of the core component chip was 0.60 to 0.62.

On the other hand, as the polyester used as the sheath component, the intrinsic viscosity obtained by ordinary solid-phase polymerization is 1.
30, a polyethylene terephthalate (PET) chip having a water content of 0.003% or less was prepared.

After the polymer for the core and sheath components is melted in separate extruder type spinning machines, it is introduced into a composite spin pack,
From the core-sheath composite spinneret, the fiber was spun into a concentric composite fiber. The core / sheath composite ratio was varied as shown in Table 1. The polymer for the core component was melted at 250 ° C., and the polymer for the sheath component was melted at 290 ° C., and spun by a composite spinning pack heated to 290 ° C.

The spinneret has two rows of circular holes and a hole diameter of 0.8 m.
mΦ, the number of holes is 18 holes, 30 cm directly below the base
And heated so that the in-cylinder atmosphere temperature became 320 ° C. The ambient temperature in the cylinder is 10c from the base
m and a position 1 cm away from the outermost yarn.

An annular chimney having a length of 40 cm was attached to the bottom of the heating cylinder, and a cool air of 40 m / min was blown from the periphery of the yarn at 25 ° C. to the yarn at right angles to cool the yarn. Next, after applying the oil agent, the yarn speed was controlled by a take-up roller of 570 m / min, and then the film was continuously drawn without being wound once.

The stretching was carried out by three pairs of Nelson-type rollers at a draw ratio of 3.5 times at the first step and 1.5 times at the second step.
After the step stretching, the film was wound with a 3% relaxation between the next Nelson rollers.

The temperature of the take-off roller was set to 130 ° C., the first stage of stretching was carried out between the take-up roller and the first stretch roller heated to 170 ° C., and between the first stretch roller and the second stretch roller heated to 240 ° C. Step stretching was performed. The next Nelson roller was used without heating. The first-stage stretching ratio was 70% of the total stretching ratio, and the remainder was stretched in the second stage, and the amount of polymer discharged was adjusted so that the total fineness of the drawn yarn became a desired denier.

The high specific gravity core-sheath type composite fiber thus obtained and a commercially available polyester multifilament were mixed in Table 1
The material mixed at the weight ratio shown in Table 1 was formed into a single-layer mesh-like bag having a leg portion and a knot portion and having a mesh size of 5 mm and a raschel knitting.

The washing net may have a single-layer structure or may have a multi-layer structure of two or more layers. In this embodiment, the specific gravity, strength, and The sedimentation in the washing liquid and the torsion during washing were evaluated, and the results are shown in Table 1.

[0044]

[Table 1] As is clear from the results in Table 1, the laundry nets of Examples 1 to 4 satisfying the conditions of the present invention all have a specific gravity of 1.4.
As described above, the strength satisfies 4.4 g / d, and the sedimentation in the washing liquid and the torsion during washing are excellent.

On the other hand, in Comparative Example 1 in which the particle content relative to the whole fiber was low, the specific gravity of the core-sheath type composite fiber was low, and the specific gravity of the washing net was low. Poor sex.

Further, although the specific gravity of the core-sheath type composite fiber is satisfied, the specific gravity of the washing net cannot be satisfied in Comparative Example 2 in which the mixing ratio with the fibers other than the core-sheath type composite fiber is low. In addition, sedimentation in washing liquid and twisting during washing are inferior.

In Comparative Example 3, a commercially available polyester fiber was used alone to form a washing net. However, since the specific gravity was not satisfied, the sedimentation in the washing liquid and the torsion during washing were extremely low. Inferior.

[0048]

As described above, the laundry net of the present invention has a high specific gravity and has excellent sedimentation in washing liquid at the time of washing.
And because it has high strength, it has excellent durability,
Further, since the shape is hardly twisted by the pressing of the washing water flow and is excellent in shape retention, damage to the laundry can be reduced.

Claims (8)

[Claims] 1. A high-density sheath having a specific gravity of 1.45 or more, comprising a mesh-like bag having an opening / closing part for taking in and out laundry partly, wherein 25% by weight or more of fibers constituting the mesh-like bag is 1.45% or more. A laundry net characterized by comprising a composite fiber. 2. The laundry net according to claim 1, wherein the specific gravity of the net-like bag is 1.40 or more. 3. The laundry net according to claim 1, wherein the core-sheath composite fiber having a high specific gravity has a core component of a synthetic resin containing at least 25% by weight of high specific gravity particles. 4. The method according to claim 1, wherein the high specific gravity particles are at least one selected from the group consisting of barium, titanium, aluminum, iron, copper, tungsten, titanium dioxide, zinc oxide, barium sulfate, and ferric oxide. The washing net according to any one of claims 1 to 3, wherein 5. The laundry net according to claim 1, wherein the synthetic resin constituting the core component and the sheath component of the high specific gravity core-sheath composite fiber is a polyester polymer. 6. The synthetic resin constituting the core component of the high specific gravity core-sheath composite fiber is a polyester polymer having a low melting point, and the synthetic resin constituting the sheath component has a higher melting point than the core component. The laundry net according to any one of claims 1 to 5, wherein 7. The laundry net according to claim 6, wherein the low melting point polyester-based polymer constituting the core component of the high specific gravity core-sheath composite fiber is a copolymerized polyester-based polymer. 8. The laundry net according to claim 1, wherein the mesh bag has a strength of 4.4 g / d or more.