JPS63309673A - Nonwoven sheet like article for cleaning - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a nonwoven sheet material for cleaning. More specifically, the present invention relates to a nonwoven sheet material for wiping that has an epoch-makingly excellent wiping effect.

[Conventional technology]

Several proposals have been made regarding nonwoven sheet materials made of ultrafine fibers.

For example, a nonwoven fabric in which fiber bundles made of ultrafine short fibers are entangled with each other is disclosed in Japanese Patent Publication No. 44-24699, and a nonwoven fabric in which ultrafine long fibers are opened and individual fibers are entangled with each other without forming a fiber bundle is disclosed in Japanese Patent Publication No. 44-24699. are described in Japanese Patent Application Laid-Open No. 60-75657.

[Problem that the invention seeks to solve]

Since the nonwoven fabric shown in Japanese Patent Publication No. 44-24699 is formed by intertwining fiber bundles made of ultra-fine short fibers, it has problems such as fraying near the cut portion and slipping of the short fibers. The surface was rough and had poor smoothness, making it unsatisfactory for cleaning.

In addition, if the fineness of the single fibers is made smaller in order to improve the wiping effect, the coefficient of friction with the object to be cleaned will increase, and for this reason, the single fibers that make up the nonwoven fabric will be torn off, and fiber fragments will be formed. This included the problem that the particles generated and adhered to the surface of the object to be cleaned.

On the other hand, the nonwoven fabric shown in Japanese Patent Application Laid-Open No. 60-75657 does not have sufficient strength because individual ultrafine long fibers are opened and entangled without forming fiber bundles. However, it was weak against tearing, paper-like and difficult to handle, and was not fully satisfactory for cleaning purposes.

Also, in this case, as in the case of the nonwoven fabric as shown in the above-mentioned Japanese Patent Publication No. 44-24699, when the fineness of the single fibers is reduced in order to improve the wiping effect, friction with the object to be cleaned is reduced. The coefficient increases, which causes the problem that the single fibers constituting the nonwoven fabric are torn off, resulting in the generation of fiber fragments that adhere to the surface of the object to be cleaned.

[Means for solving problems]

The present inventors aimed to solve the above-mentioned problems and provide an excellent nonwoven sheet material for wiping that is easy to handle, has a sufficient wiping effect, and has little secondary contamination. As a result of intensive research, we have finally arrived at the present invention.

That is, the present invention provides a non-woven sheet-like material mainly composed of substantially continuous ultra-fine long fibers of 0.1 denier or less, the non-woven sheet-like material comprising a plurality of substantially continuous ultra-fine long fibers. Fiber bundles consisting of randomly intersect and intertwine, and furthermore,
The ultra-thin long fibers that make up the fiber bundle are entangled within and between the fiber bundles to form a mesh.

First, it is a nonwoven sheet-like material for cleaning, characterized by being provided with a smoothing agent.

The present invention will be explained in detail below.

In the present invention, the nonwoven sheet-like material for cleaning is mainly 0.
．． It is composed of substantially continuous ultrafine long fibers of 1 denier or less.

The smaller the single fiber fineness of the ultra-thin long fibers, the greater the ability to strip off dust and oil film adhering to the surface of the object to be cleaned, and the ability to form a dense, flexible, and easy-to-handle nonwoven sheet-like material. In addition, since the sustained release property of the applied smoothing agent increases, 0.
It is preferably 1 denier or less, and more preferably 0.05 denier or less.

The material for the ultrafine long fibers can be arbitrarily selected from fiber-forming polymers, but it is preferably selected from polymers such as polyester, polyamide, polyolefin, polyphenylene, regenerated cellulose, etc. depending on the purpose. can do.

The cross-sectional shape of the ultrathin long fibers may be circular, elliptical, flat, polygonal, or hollow.

In the present invention, the nonwoven sheet-like material for cleaning has fiber bundles consisting of a plurality of substantially continuous ultra-thin long fibers that intersect and intertwine with each other, and the ultra-thin long fibers constituting the fiber bundle are It has a structure in which the fiber bundles are intertwined within and between the fiber bundles, and this structure is made by forming a sheet-like entangled body from a multicomponent composite long fiber web capable of developing an ultrafine long fiber bundle, and then developing an ultrafine long fiber bundle. It is preferably formed by a method in which ultrathin long fibers are entangled.

The multicomponent composite filaments are not particularly limited as long as they can express ultrafine filament bundles, but include long fibers with mutually arranged polymers called sea-island composite filaments, and exfoliated composite filaments. Polymer mutually arranged long fibers called fibers are preferably used.

The number of ultrafine long fibers constituting the ultrafine long fiber bundle is related to wipeability, flexibility, and manufacturing cost, so it is preferably 15 to 1,500, and particularly preferably 35 to 700.

The method for forming an entangled body of multicomponent composite long fiber webs capable of producing ultrafine long fiber bundles is not particularly limited, but includes, for example, spinning a plurality of multicomponent composite fibers and opening them using an air ejector. An efficient and particularly preferred method is to spread the nonwoven web onto a moving conveyor to form a nonwoven web, and then subject the web to entanglement treatment such as needling.

The generation of ultrafine long fiber bundles can be selected from methods such as extraction of components partitioning ultrafine long fibers and peeling and division between ultrafine long fibers, depending on the form of the multicomponent composite long fibers.

The present invention further has a structure in which the ultrafine long fibers constituting the fiber bundle are entangled within and between the fiber bundles.

Such a structure is preferably formed by developing ultrafine long fiber bundles and then further entangling them.

As a method for entangling the ultrathin long fibers, needling is preferred, and water jet punching is more preferred since it causes less damage to the fibers.

When heat-shrinked after the entanglement of the multicomponent composite filaments or after the entanglement of the ultrathin filaments, a more dense nonwoven sheet is formed, and a more preferable nonwoven sheet for cleaning is can get.

In the present invention, it is also an essential requirement that a smoothing agent be added.

The smoothing agent is not particularly limited as long as it lowers the coefficient of friction with the object to be cleaned, but it is particularly preferable to use one that lowers the coefficient of static friction.

In addition, as the smoothing agent, either water-soluble or water-insoluble smoothing agents can be used, but especially when a water-insoluble smoothing agent is used, it has high durability against washing and can be repeatedly recycled by washing. A nonwoven sheet for wiping is obtained, which is particularly advantageous.

The water-insoluble smoothing agent is 1 containing 0.05% of smoothing agent.
A smoothing agent that has a residual rate of 90% or more after rinsing a nonwoven sheet material for cleaning with 100g of water at 25°C for 5 minutes while stirring. be.

Next, particularly preferred smoothing agents for the present invention will be illustrated, but the present invention is not limited thereto.

For example, polyethylene with a melting point of 101°C or more and 120°C or less, dimethylpolysiloxane or methylhydrogen, lysiloxane, polytetrafluoroethylene, polychlorotrifluoroethylene, or hexafluoroethylene with a viscosity of 100 to 2000 centistokes at 25°C. Preferable examples include fluorine-containing compounds such as propylene, alkyl sthialates, alkyl phosphates, oleyl adipate, surfactants such as soaps, reverse soaps, and neutral detergents, alone or in combination.

The preferable content of the smoothing agent, expressed as a weight percentage of the active ingredient in an absolutely dry state, is 0.01 to 1.00%, and 0.01 to 1.00%.
A particularly preferred range is 0.05 to 0.50%.

The smoothing agent can be applied by forming an emulsion using an appropriate emulsifier or by using an appropriate solvent (including water).
After forming an ultrafine long fiber bundle from the entangled body of the multicomponent composite long fiber web in the manufacturing process of the nonwoven sheet for cleaning, it is applied by spraying, dipping, etc. is preferable because the leveling agent is less likely to fall off.

Hereinafter, a preferred concept of a nonwoven sheet for cleaning in an example of an embodiment of the present invention will be explained with reference to the drawings.
The present invention is not limited thereby.

FIG. 1 is a schematic diagram showing the structure of a two-component composite long fiber entangled body which is an intermediate in the present invention, and FIG. FIG. 2 is a schematic diagram showing the structure of a woven sheet.

In this embodiment, first, 2 which can express ultrafine long fibers 1
A two-component composite long fiber entangled body, which is an intermediate in the present invention, is formed by randomly intersecting and intertwining the component composite long fibers 2 while maintaining their shapes.

Subsequently, the components surrounding the ultrafine long fibers 1 of the two-component composite long fibers 2 are removed to develop an ultrafine long fiber bundle 3 made of the ultrafine long fibers 1, and then the plums forming the ultrafine long fiber bundle 3 are removed. The elongated fiber 'a1 is entangled in the fiber conduit 4 and intertwined between the fiber bundles 5,
Furthermore, a smoothing agent is added to form the nonwoven sheet material for cleaning of the present invention.

FIGS. 3 and 4 are schematic diagrams showing the cross-sectional structure of a conventional nonwoven fabric.

That is, FIG. 3 is a schematic diagram showing the concept of a nonwoven fabric made of ultrafine fiber bundles intertwined with each other, as disclosed in Japanese Patent Application Laid-Open No. 60-75657, which was previously mentioned as a known example. FIG. 4 is a schematic diagram showing the concept of a nonwoven fabric made by entangling ultrafine fiber bundles while maintaining the fiber bundle form, as proposed in Japanese Patent Publication No. 44-24699.

The nonwoven sheet material for cleaning of the present invention, as illustrated in FIG. 2, has a novel structure not found in conventional nonwoven fabrics as shown in FIGS. 3 and 4, and is also provided with a smoothing agent. There is.

The cleaning non-woven sheet material of the present invention uses the action of ultra-fine long fibers to strip off contaminants such as fine dust and oil films adhering to the surface of the object to be cleaned, and seeds them through the smoothing agent. Since it is held in the fine spaces near the long filaments, it is possible to exhibit high performance such as a groundbreakingly excellent wiping effect and extremely little secondary contamination.

〔Example〕

Next, the present invention will be explained in more detail with reference to examples, but the validity and scope of rights of the present invention are not limited or restricted by these examples, and the present invention is not intended to lead to the following applications and developments. It is.

Example 1 10 parts of polymethylphate as the sea component and 90 parts of polyethylene terephthalate as the island component were arranged in a dispersion of 500 islands in the sea component through a die for forming a polymer mutual array. , spinning a plurality of two-component composite filaments,
The fibers were drawn at a speed of 1000 m/min to obtain undrawn elongated fibers having a single fiber fineness of 9.6 denier.

Subsequently, the undrawn filaments were stretched 3.2 times in superheated steam at 120°C, opened, and stacked on a moving wire mesh conveyor to obtain a nonwoven web of two-component composite filaments. Ta.

If the sea component is removed, the two-component composite long fiber has 0, O
A fiber bundle consisting of 500 O6 denier ultrafine long fibers could be produced.

Furthermore, the nonwoven web of the two-component composite filaments was cross-laminated using a cross wrapper so that the number of layers was 8, and needling was performed at a needle point density of 500 pieces/cfi to form the two-component composite filaments. A composite long fiber entangled body was obtained by randomly intersecting and intertwining.

Subsequently, the composite long fiber entangled body is introduced into a trichlorethylene bath to remove the sea component to develop an ultra-thin long fiber bundle, and then subjected to entanglement treatment using a high-speed hydroentanglement device, followed by shrinkage and drying treatment. , a precursor having a basis weight of 100 g/m' was obtained.

Furthermore, a solution containing 2% by weight of dimethylpolysiloxane having a viscosity of 1000 centistokes at 25°C is sprayed onto the precursor as a smoothing agent, and after heat treatment, the dimethylpolysiloxane is reduced to zero. A nonwoven sheet material for cleaning of the present invention containing .2% by weight was obtained.

The cleaning nonwoven sheet material was cut into 20 cm square pieces with scissors and used for cleaning the lenses of eyeglasses. It is extremely effective, clearly easy to handle, almost never recontaminated by stripped contaminants, short fibers, or torn fiber fragments, and can be reused repeatedly by washing. It was extremely good.

Example 2 A combination of sea component, 30% by weight of hot water soluble polyester made by polymerizing terephthalic acid, isophthalic acid, sodium sulfonated isophthalic acid, and ethylene glycol, and island component, 70% by weight of nylon 6. Then, a plurality of two-component composite filaments, each consisting of a sea component and an island component arranged in a dispersion of 70 parts, were spun through a polymer mutual arrangement forming spinneret, and 5,000 fibers were spun using an air ejector.
It was pulled at a speed of m/min, collided with a friction plate, and spread on a moving wire mesh conveyor to obtain a sheet-like two-component composite long fiber web.

If the sea component is removed, the two-component composite long fiber has a content of 0.01
A fiber bundle consisting of 70 denier ultrafine long fibers could be produced.

Subsequently, the two-component composite long fiber web was needled to a needle point density of 700 pieces/i to obtain a composite long fiber entangled body in which the two-component composite long fibers were randomly crossed and entangled. Ta.

Further, the composite long fiber entangled body was introduced into a boiling water bath to be heat-shrinked, and the sea component was removed to obtain an ultrafine long fiber bundle entangled body.

Subsequently, an emulsion made by emulsifying polyethylene with a melting point of 105°C to 1% by weight is applied as a smoothing agent to the ultrathin long fiber bundle, and after dehydration and drying, needle punching is performed using a needle punching device. The nonwoven sheet for cleaning of the present invention was subjected to entanglement treatment to have a density of 5000 fibers/d, and had a basis weight of 120 g/m and contained 0.02% by weight of polyethylene.

The nonwoven sheet material for cleaning has a width of 20 cm and a length of 3 cm.
Comparative Examples 1 to 0 cm were cut with a cutter and used to clean wooden furniture that had been finished with varnish.
Compared to the nonwoven sheet-like material described in 4, it has better workability and
It has revolutionary excellent wiping and elongating effects, almost no re-contamination caused by stripped contaminants, loose short fibers, or torn fiber fragments, and can be reused repeatedly by washing. , which was extremely excellent.

Comparative Example 1 After introducing the composite long fiber entangled body, which is the intermediate of Example 1, into a trichlorethylene bath to remove the sea component and forming an ultrafine long fiber bundle entangled body, no ultrafine long fiber entanglement treatment was performed. After shrinking and drying, the fabric weight is 100g/n (
A nonwoven sheet-like material as shown in FIG. 4 was obtained.

The surface of the nonwoven sheet material is rough and the wiping effect is insufficient.
Disadvantages were observed in that the vicinity of the cut portion was prone to fraying and fiber fragments adhered to the surface of the object to be cleaned.

Comparative Example 2 The nonwoven sheet of Comparative Example 1 was further sprayed with a solution containing 2% by weight of dimethylpolysiloxane having a viscosity of 1000 centistokes at 25°C as a smoothing agent. After heat treatment, a nonwoven sheet containing 2% by weight of dimethylpolysiloxane was obtained.

The surface of the nonwoven sheet material is rough and the wiping effect is insufficient.
A drawback was found that the area near the cut portion was prone to fraying.

Comparative Example 3 A sheet-like web made of two-component composite filaments, which is the intermediate of Example 2, was introduced into a high-speed hydroentanglement device and
By injecting hot water at ℃ to remove the sea component and reveal the ultra-thin long fibers that were spread apart, the ultra-fine long fibers were entangled to obtain a non-woven sheet-like product as shown in Figure 3. .

The nonwoven sheet-like material has insufficient strength, is weak against tearing, and is paper-like, making it unsatisfactory for cleaning. The defect of adhesion was observed.

Comparative Example 4 To the nonwoven sheet-like material of Comparative Example 3, an emulsion of polyethylene with a melting point of 105° C. was emulsified to 5% by weight was further added as a smoothing agent, and the polyethylene was added to 0.5% by weight.
A nonwoven sheet material containing 0.05% was obtained.

The nonwoven sheet-like material had insufficient strength and was weak against tearing, and was not fully satisfactory for wiping.

〔Effect of the invention〕

The effects of the present invention are listed as follows.

(1) Since it is mainly composed of substantially continuous long fibers, there is almost no problem of short fibers shedding through and adhering to the object to be cleaned.

(2) Due to the action of the ultra-thin long fibers on the surface, contaminants such as fine dust and oil films adhering to the surface of the object to be cleaned are stripped off, and the fine spaces near the ultra-thin long fibers are removed through the smoothing agent. , the wiping effect is revolutionary, and there is extremely little eye, eye, or secondary contamination.

(3) The coefficient of friction with the object to be cleaned is low, and the ultra-thin long fibers are hardly fragmented and attached to the object to be cleaned.

(4) In particular, non-woven sheets for wiping that are provided with a water-insoluble smoothing agent retain the smoothing agent even after washing, so the wiping effect is less attenuated and can be reused by repeated washing. be.

(5) It is flexible and has a lot of elasticity, and is easy to handle, making it especially easy to clean uneven objects to be cleaned.

(6) It does not easily fray, so it can be used as is.

Therefore, measures against fraying, such as fusing the cut portions or applying oversewing, can be omitted, resulting in labor savings and cost reductions.

(7) Since it is highly flexible, it hardly damages the object itself when it is used as a normal cleaning object.

Therefore, the nonwoven sheet material for wiping of the present invention is suitable for wiping articles as exemplified below.

Glasses and optical equipment lenses, contact lenses, television screens (including displays for computers, word processors, etc.), electromagnetic shielding screens, furniture, 3! I J, f items, antiques, arts, crafts, window glass, windshield glass, display cases, scientific equipment, chemical equipment, analytical equipment, medical equipment, precision equipment, semiconductor materials, dust-free room equipment, sterile room equipment , jewelry and precious metals, the human body (
(especially women's makeup remover, etc.), leather products, artificial leather products,
etc.

[Brief explanation of drawings]

FIG. 1 is a schematic diagram showing the structure of an intermediate, which represents an example of an embodiment of the present invention, and FIG. 2 is a part of the structure of a nonwoven sheet-like product for cleaning, which represents an example of an embodiment of the present invention. Figures 3 and 4 are schematic diagrams showing the structure of a nonwoven sheet, and Figures 3 and 4 are schematic diagrams showing the structure of conventional nonwoven fabrics. Inter-bundle entanglement of ultra-fine long fibers.

Claims (1)

[Claims] A non-woven sheet-like material mainly consisting of substantially continuous ultra-thin long fibers of 0.1 denier or less, the non-woven sheet-like material having no fiber bundles consisting of a plurality of substantially continuous ultra-thin long fibers. A nonwoven sheet material for cleaning, characterized in that the fiber bundles are intertwined with each other, and the ultrafine long fibers constituting the fiber bundles are intertwined within and between the fiber bundles, and a smoothing agent is applied thereto. .