QUILT COVER

Abstract

A quilt cover which makes difficult the slippage of a quilt in the quilt cover without impairing the lightweight and softness of the quilt cover. The quilt cover has a part composed of cloth “a” containing fibers “A” having a monofilament diameter of 10 to 10,000 nm.

Description

TECHNICAL FIELD

The present invention relates to a quilt cover which makes difficult the slippage of a quilt in the quilt cover.

BACKGROUND ART

As a prior art method of making difficult the slippage of a quilt in a quilt cover, for example, Patent Document 1 proposes a method of fixing a small friction material made of a soft resin or synthetic rubber to a quilt cover or a quilt. However, this method has a disadvantage that the lightweight and softness of the quilt cover or the quilt may be impaired.

(Patent Document 1) JP-A 2006-349

DISCLOSURE OF THE INVENTION

An object of the present invention which was made in view of the above situation is to provide a quilt cover which makes difficult the slippage of a quilt in the quilt cover without impairing the lightweight and softness of the quilt cover.

The inventors of the present invention conducted intensive studies to attain the above object and found that a quilt cover which makes difficult the slippage of a quilt in the quilt cover is obtained by placing cloth containing fine fibers on a surface in contact with the quilt of the quilt cover without impairing the lightweight and softness of the quilt cover. The present invention was accomplished by further conducting intensive studies.

Thus, according to the present invention, there is provided “a quilt cover having a part composed of cloth “a” containing fibers “A” having a monofilament diameter of 10 to 10,000 nm”.

When the quilt cover is opened, the above part is arranged on the rear surface of the quilt cover, and the area ratio of the part to the rear surface is preferably not less than 3%. The area ratio of the above part to the rear surface is more preferably 3 to 40%.

Preferably, the monofilament diameter of the above fibers “A” is 10 to 1,000 nm. Preferably, the above part has a width of 5 to 100 cm and a length of 50 to 200 cm.

Preferably, the above part is sewed or bonded to the quilt cover. Preferably, the above part is sewed or bonded to the rear surface on a human side and/or the rear surface on an outer side of the quilt cover. Preferably, the above part is sewed or bonded to a position 0 to 50 cm away from the end of the quilt cover. Preferably, the above part is sewed or bonded to a plurality of sites.

Preferably, the above fibers “A” are long fibers, each having not less than 500 filaments. Preferably, the above fibers “A” are yarn obtained by dissolving and removing the sea component of sea-island type composite fibers composed of a sea component and an island component. Preferably, the above fibers “A” are made of polyester. Preferably, the above cloth further contains fibers “B” having a monofilament diameter larger than 10,000 nm.

Preferably, the cloth “a” is woven, knitted or nonwoven cloth.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 are schematic diagrams showing an example of the quilt cover of the present invention wherein the left diagram shows that the quilt cover is opened and the right diagram shows that the quilt cover is closed;

FIG. 2 is a schematic diagram showing a method of measuring a friction resistance value; and

FIG. 3 is a diagram of a knit texture used in Example 1.

EXPLANATION OF REFERENCE SYMBOLS

• 1: quilt cover
• 2: cloth “a”
• 3: cloth “a”
• 4: cloth “a”
• 5: pulley
• 6: head
• 7: sample

BEST MODE FOR CARRYING OUT THE INVENTION

Cloth “a”

The quilt cover of the present invention has a part composed of cloth “a” containing fibers “A” having a monofilament diameter of 10 to 10,000 nm.

(Fibers “A”)

It is important that the above fibers “A” should have a monofilament diameter (diameter of a monofilament) of 10 to 10,000 nm (preferably 10 to 1,000 nm, more preferably 250 to 800 nm, particularly preferably 510 to 800 nm). When the monofilament diameter is smaller than 10 nm, the fiber strength deteriorates disadvantageously. When the monofilament diameter is larger than 10,000 nm, a sufficiently high antislipping effect may not be obtained disadvantageously. When the cross section of the monofilament is a modified cross section other than a circular cross section, the diameter of a circumscribing circle is taken as the monofilament diameter. The monofilament diameter an be measured by photographing the cross section of a fiber with a transmission electron microscope.

When the above fibers “A” are filament yarn (long fibers), the number of filaments is not particularly limited. It is preferably not less than 500 (more preferably 2,000 to 50,000) to obtain an excellent antislipping effect. The total fineness of the filament yarn (product of monofilament fineness and the number of filaments) is preferably 30 to 800 dtex.

The above fibers “A” are not limited to a particular form and may be short fibers or long fibers (filament yarn). They are preferably long fibers (filament yarn). The cross section of the monofilament is not particularly limited and may be a known cross section such as a circular, triangular, flat or hollow cross section. The fibers “A” may be subjected to ordinary air processing or false-twist crimping processing.

The polymer forming the above fibers “A” is not limited to a particular type but preferably a polyester-based polymer or nylon-based polymer. Preferred examples of the polymer include polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polylactic acid and polyesters comprising a third component. The polyester may be a polyester which is obtained by material recycling or chemical recycling. Further, it may be a polyester obtained by using a catalyst containing a specific phosphorus compound and a specific titanium compound as disclosed by JP-A 2004-270097 and JP-A 2004-211268, polylactic acid or stereocomplex polylactic acid. The above polyester polymer may comprise one or more pore forming agents, cationic dye dyeable agents, coloring inhibitors, heat stabilizers, fluorescent brightening agents, matting agents, coloring agents, hygroscopic agents and inorganic fine particles.

(fibers “B”)

The cloth “a” contained in the quilt cover of the present invention may be composed of only the above fibers “A”. However, when it is composed of the above fibers “A” and fibers “B” having a monofilament diameter larger than 10,000 nm as other fibers, the shape retainability of the cloth “a” improves advantageously.

The above fibers “B” have a monofilament diameter of preferably more than 10,000 nm (more preferably 10 to 33 μm). “33 μm” is equal to about 10 dtex in terms of fineness. When the monofilament diameter of the fibers “B” is smaller than 10,000 nm (10 μm), the shape retainability of the cloth “a” may be impaired. When the cross section of the monofilament is a modified cross section other than a circular cross section, the diameter of a circumscribing circle is taken as the monofilament diameter. The monofilament diameter can be measured by photographing the cross section of a fiber with a transmission electron microscope as described above.

When the above fibers “B” are filament yarn (long fibers), the number of filaments is not particularly limited but preferably 1 to 300. The total fineness is preferably 10 to 800 dtex.

The above fibers “B” are not limited to a particular form and may be spun yarn. Long fibers (multifilament yarn), polyurethane fibers or both of them are preferably used. The cross section of the monofilament is not particularly limited and may be a known cross section such as a circular, triangular, flat or hollow cross section. The fibers “B” may be subjected to ordinary air processing or false-twist crimping processing. The fibers “B” may be of a single type or a plurality of types, for example, fibers B1, fibers B2, fibers B3, etc.

The polymer forming the above fibers “B” is not limited to a particular type. Preferred examples of the polymer include polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polylactic acid, stereocomplex polylactic acid, polyesters comprising a third component, polyether ester and urethane. The polyester may be a polyester which is obtained by material recycling or chemical recycling. Further, it may be a polyester obtained by using a catalyst containing a specific phosphorus compound and a specific titanium compound as disclosed by JP-A 2004-270097 and JP-A 2004-211268, polylactic acid or stereocomplex polylactic acid. To further improve the antislipping effect, an elastic resin such as polyether ester or polyurethane is preferred. The above polymer forming the above filament yarn B may comprise one or more pore forming agents, cationic dye dyeable agents, coloring inhibitors, heat stabilizers, fluorescent brightening agents, matting agents, coloring agents, hygroscopic agents and inorganic fine particles.

The above fibers “B” may be composite yarn. Preferred examples of the composite yarn include composite yarn obtained by air mixing together elastic fiber yarn composed of polyurethane fibers or polyether ester-based fibers and polyester-based fiber yarn by means of an interlace air nozzle, composite yarn obtained by covering elastic fiber yarn with polyester-based yarn and composite yarn composed of spun yarn.

It is preferred that the above fibers “A” should be exposed to either one of the front surface and the rear surface of the cloth contained in the quilt cover of the present invention. For example, friction force with a quilt is improved by using the above fibers “A” in contact with the quilt, thereby obtaining an excellent antislipping effect. It is preferred that when the area AA of the fibers “A” and the area BA of the fibers “B” are measured in a photograph of the surface of gray cloth with an electron microscope at a magnification of 50, the area ratio (%) of the fibers “A” (=AA/(AA+BA)×100) should be not less than 30% (preferably 100%). It is particularly preferred that only the above fibers “A” should be exposed to either one of the front surface and the rear surface of the above cloth “a”. When the quilt cover is used while the surface to which only the fibers “A” are exposed is placed on the quilt side, friction force with the quilt improves, thereby obtaining an antislipping effect.

<Production of Cloth “a”>

The cloth “a” may be produced, for example, by the following production process.

(fibers “A”)

Sea-island type composite fibers (fibers for fibers “A”) composed of a sea component and an island component having a diameter of 10 to 10,000 nm are first prepared. A sea-island type composite fiber multifilament (100 to 1,500 islands) disclosed by JP-A 2007-2364 are preferably used as the sea-island type composite fibers.

That is, a polymer which is easily soluble in an alkali aqueous solution is used as the above sea component polymer. Preferred examples of the polymer easily soluble in an alkali aqueous solution include polylactic acid, a super high molecular weight polyalkylene oxide condensate-based polymer, a polyethylene glycol-based compound copolyester, and a copolyester of a polyethylene glycol-based compound and 5-sodium sulfonic acid isophthalic acid. Out of these, a polyethylene terephthalate-based copolyester having an intrinsic viscosity of 0.4 to 0.6 obtained by copolymerizing 6 to 12 mol % of 5-sodium sulfoisophthalic acid and 3 to 10 wt % of polyethylene glycol having a molecular weight of 4,000 to 12,000 is particularly preferred.

Meanwhile, a polyester such as fiber forming polyethylene terephthalate, polytrimethylene terephthalate, polybutylene terephthalate, polylactic acid or a polyester comprising a third component is preferred as the island component polymer. The polymer may comprise one or more pore forming agents, cationic dye dyeable agents, coloring inhibitors, heat stabilizers, fluorescent brightening agents, matting agents, coloring agents, hygroscopic agents and inorganic fine particles as required as long as the object of the present invention is not impaired.

It is preferred that the melt viscosity of the sea component of the sea-island type composite fibers composed of the above sea component polymer and the above island component polymer should be higher than the melt viscosity of the island component polymer at the time of melt spinning. The diameter of the island component must fall within the range of 10 to 1,000 nm. When the island component is not spherical, the diameter of a circumscribing circle is obtained. In the above sea-island type composite fibers, the sea-island conjugate weight ratio (sea:island) is preferably 40:60 to 5:95, particularly preferably 30:70 to 10:90.

The sea-island type composite fibers may be easily produced, for example, by the following process. That is, melt-spinning is carried out by using the above sea component polymer and the above island component polymer. As a spinneret used for melt-spinning, a spinneret having hollow bottles or pores for forming the island components may be used. The discharged sea-island type composite fibers are solidified with cooling air and melt spun at a rate of preferably 400 to 6,000 m/min to be taken up. The obtained undrawn yarn is preferably formed into composite fibers having desired strength, elongation and thermal contraction characteristics through a separate drawing step. Alternatively, after the discharged sea-island type composite fibers are taken up by a roller at a constant speed without being wound up and then subjected to a drawing step, they are wound up.

Preferably, the sea-island type composite fibers (multifilament) thus obtained have a monofilament fineness of 0.5 to 10.0 dtex, 5 to 75 filaments and a total fineness of 30 to 170 dtex. The boiling water shrinkage of the sea-island type composite fibers is preferably 5 to 30%.

The above filament yarn may be fine fibers composed of composite fibers such as petal type composite fibers or side-by-side type composite fibers, or fine fibers obtained by ordinary spinning and drawing steps.

(fibers “B”)

Meanwhile, fibers “B” having a monofilament diameter larger than 10,000 nm are prepared as required. The monofilament fineness of the fibers “B” is preferably not less than 0.1 dtex (more preferably 0.1 to 50 dtex).

The above fibers “B” are preferably highly shrinkable polyester having a boiling water shrinkage of not less than 10% (preferably 20 to 40%) or elastic yarn (polyurethane elastic yarn or polyether ester elastic yarn). To obtain the above high boiling water shrinkage, spinning and drawing should be carried out in accordance with commonly used processes by using a copolyester. At this point, the main constituent monomers of the copolyester are terephthalic acid and ethylene glycol, and the third component to be copolymerized with the main constituent monomers is preferably selected from the group consisting of isophthalic acid, naphthalene dicarboxylic acid, adipic acid, sebacic acid, diethylene glycol, polyethylene glycol, bisphenol A and bisphenol sulfone. The above copolyester is preferably a copolyester comprising terephthalic acid and isophthalic acid in a (terephthalic acid/isophthalic acid) molar ratio of 90/5 to 85/15 as acid components and ethylene glycol as a glycol component. A high boiling water shrinkage is obtained by using this copolyester.

(Weaving or Knitting of Cloth “a”)

Then, the cloth “a” is woven or knitted in accordance with a commonly used method by using the above sea-island composite fibers and optionally the fibers “B”. It is preferred that the above sea-island type composite fibers should be exposed to either one of the front surface and the rear surface of the cloth.

Although the sea-island type composite fibers and the fibers “B” may be contained in the cloth as combined filament yarn, the cloth (knitted or woven fabric) is preferably woven or knitted by interweaving or interknitting the above filament yarn A and the above filament B.

When not only the sea-island type composite fibers but also the above fibers “B” are used, the total fineness ratio of the above sea-island type composite fibers to the filament yarn “B” is preferably 90:10 to 20:80.

The above cloth may be woven cloth, knitted cloth or nonwoven cloth and is not particularly limited. The above cloth is not limited to a particular texture. Examples of weft knit texture include plain stitch, rib stitch, interlock stitch, purl stitch, tuck stitch, float stitch, half cardigan stitch, lace stitch and plating stitch. Examples of warp knit texture include single Denbigh stitch, single atlas stitch, double cord stitch, half stitch, half base stitch, satin stitch, half tricot stitch, fleeced stitch and jacquard stitch. Examples of weave texture include three foundation weaves such as plain weave, twill weave and satin weave, derivative weave, half double weave such as warp backed weave and weft backed weave, and warp velvet. As a matter of course, the texture is not limited to these. The number of layers may be one or two or more.

(Treatment with Alkali Aqueous Solution)

Thereafter, when the above cloth is treated with an alkali aqueous solution to dissolve and remove the sea component of the sea-island type composite fibers with the alkali aqueous solution, the sea-island type composite fibers become the fibers “A” having a monofilament diameter of 10 to 10,000 nm, thereby obtaining the cloth “a” containing the fibers “A” having a monofilament diameter of 10 to 10,000 nm. At this point, as the conditions of the treatment with the alkali aqueous solution, it is recommended that a NaOH aqueous solution having a concentration of 3 to 4% should be used to carry out the treatment at a temperature of 55 to 65° C.

(dyeing)

Before and/or after the step of dissolving and removing with the alkali aqueous solution, the cloth may be dyed. It may be calendared (heat pressurization) or embossed. It may be further subjected to raising, water-repellent processing and optionally processing for providing the function of an ultraviolet screening agent, antistatic agent, antibacterial agent, deodorant, insecticide, luminous agent, retroreflective agent or minus ion generator.

<Quilt Cover>

The quilt cover of the present invention may be composed of only the cloth “a” or both the cloth “a” and another cloth. For example, the above cloth may be sewed or bonded (thermally or chemically bonded) to the rear surface on a human side (surface in contact with the quilt) and/or the rear surface on an outer side (surface in contact with the quilt) of a commercially available quilt cover. Further, the above cloth may be sewed to a cutout part of the quilt cover or may be sewed to another cloth as parts to produce a quilt cover. It is preferred that the above cloth “a” should be sewed or bonded to a position 0 to 50 cm away from the end of the quilt cover. This distance is obtained by measuring the shortest distance between the end of the quilt cover and the end of the cloth “a”.

Preferably, the part composed of the cloth “a” has a width of 5 to 100 cm and a length of 50 to 200 cm. The number of the parts may be one or more.

Preferably, when the quilt cover is opened, the above part is arranged on the rear surface side of the quilt cover, and the area ratio of the part to the rear surface is not less than 3% (preferably 3 to 40%) in order to prevent the slippage of the quilt in the quilt cover.

The above area ratio is calculated from the following equation.

Area ratio=[total area of the parts/total surface area of rear surface of quilt cover]×100

The “total surface area of rear surface of quilt cover” is obtained by measuring the total surface area of the rear surface of the quilt cover while the quilt cover is opened as shown in FIG. 1. For example, when two parts measuring 10 cm×150 cm are formed in a quilt cover having a width of 150 cm and a length of 210 cm, the area ratio is as follows.

Area ratio=[(10×150×2)/(150×210)×2]×100=4.76%

Since the quilt cover of the present invention includes the above cloth “a”, it has the effect of making difficult the slippage of a quilt in the quilt cover without impairing the lightweight and softness of the quilt cover.

Preferably, the above cloth “a” has a friction resistance value of not less than 40 cN (preferably 40 to 50 cN).

The friction resistance value is a resistance value (cN) measured by the following method. That is, the cloth “a” as a sample (7) is placed on a flat table as schematically shown in FIG. 2 in an environment having a temperature of 20° C. and a relative humidity of 65%. Then, a friction resistance measurement head (6) for a quilt having a bottom surface measuring 10 cm×8 cm, a height of 3 cm and a weight of 10 gr (9.8 cN) is placed on the cloth “a”. A commercially available quilt is purchased, and side cloth (100% of polyester, plain weave) and inner cotton (100% of polyester) are cut to the above size and sewed together for the head (6). Then, the resistance value (cN) is measured when the head is pulled at a speed of 500 mm/min with a tensile tester.

EXAMPLES

The following examples and comparative examples are provided for the purpose of further illustrating the present invention but are in no way to be taken as limiting. Measurement items in these examples were measured by the following methods.

<Melt Viscosity>

After a polymer after drying was set in an orifice set to the melting temperature of an extruder at the time of spinning to be kept molten for 5 minutes, it was extruded under a load of several levels to plot shearing speed and melt viscosity at each time. These plots were smoothly interconnected to forma shearing speed-melt viscosity curve so as to find a melt viscosity at a shearing speed of 1,000 sec⁻¹.

<Dissolution Speed>

Yarn having sea and island components was taken up through a 0.3 φ−0.6 L×24H spinneret at a spinning rate of 1,000 to 2,000 m/min and drawn to ensure that the degree of residual elongation became 30 to 60% so as to produce a multifilament having a fineness of 84 dtex/24 fil. The weight reduction rate was calculated from the dissolution time and the dissolution amount based on a bath ratio of 100 at a temperature for dissolution with each solvent.

<Monofilament Diameter>

After the cloth was photographed with an electron microscope, the monofilament diameter was measured 5 times to obtain an average value.

<Friction Resistance Value>

A friction resistance value (cN) was measured by the following method as an alternative characteristic for friction force. That is, as schematically shown in FIG. 2, cloth as a sample (7) was placed on a flat table in an environment having a temperature of 20° C. and a relative humidity of 65%. Then, a friction resistance measurement head (6) for a quilt having a bottom surface measuring 10 cm×8 cm, a height of 3 cm and a weight of 10 gr (9.8 cN) was placed on the cloth. A commercially available quilt was purchased, and side cloth (100% of polyester, plain weave) and inner cotton (100% of polyester) were cut to the above size and sewed together for the head (6). Then, the resistance value (cN) was measured when the head (6) was pulled at a speed of 500 mm/min with a tensile tester.

<Antislip Property>

A use test was made on an antislip quilt cover obtained in Example 1 and a quilt cover obtained in Comparative Example 1 by 20 testers for 1 month. The slippage of a quilt in the quilt cover was evaluated based on the following three grades in a movement when sleeping in a daily quilt (grade 3: rarely slip, grade 2: may slip by a large movement, class 1: may slip by a small movement).

Example 1

Sea-island composite undrawn fibers ((sea/island) dissolution speed ratio=230) having a sea:island ratio of 30:70 and 836 islands obtained by using polyethylene terephthalate (melt viscosity at 280° C. of 1,200 poise, content of matting agent: 0 wt %) as an island component and polyethylene terephthalate (melt viscosity at 28° C. of 1,750 poise) obtained by copolymerizing 6 mol % of 5-sodium sulfoisophthalic acid and 6 wt % of polyethylene glycol having a number average molecular weight of 4,000 as a sea component were melt spun at a spinning temperature of 280° C. and a spinning rate of 1,500 m/min and taken up.

The obtained undrawn yarn was drawn with a roller at a draw temperature of 80° C. and a draw ratio of 2.5 times and heat set at 150° C. to be taken up. The obtained sea-island type composite fibers (drawn yarn A-1 for the fibers “A”) had a fineness of 56 dtex/10 fil, and when the cross section of each fiber was observed with a transmission electron microscope TEM, the islands were circular and had a diameter of 710 nm.

Meanwhile, polyester highly shrinkable yarn (total fineness of 33 dtex/12 fil, manufactured by Teijin Limited) A-2 and the drawn yarn A-1 were interlaced to prepare combined filament yarn having a fineness of 90 dtex/22 fil. Commercially available polyester false-twisted crimped yarn having a fineness of 75 dtex/36 fil (monofilament diameter of 12,600 nm) was prepared as the fibers “B”.

Then, circular knitted cloth having a mesh texture was obtained by using these yarns and a 28 G 33-inch circular knitting machine (LPJ25 manufactured by Fukuhara Works Ltd.). Thereafter, to remove the sea component of the sea-island type composite drawn yarn of the obtained knitted cloth, the amount of an alkali was reduced by 30% with a 2.5% NaOH aqueous solution at 70° C. Then, high-pressure dyeing was carried out at 130° C. and dry-heat setting was carried out at 170° C. as final setting to obtain the cloth “a”.

In the obtained cloth “a”, the monofilament diameter of the drawn yarn A-1 for the fibers “A” (39 dtex/8360 fil) was 710 nm. The friction resistance value of the front side surface of the cloth “a” was 76 cN which is more than twice that of the cloth (24 cN) of Comparative Example 1.

The cloth “a” as antislip cloth was sewed to the rear surface on the human side of a commercially available quilt cover (plain woven fabric having side cloth made of 100% of polyester, inner cotton made of 100% of polyester fibers, size of 150 cm×210 cm) to produce an antislip quilt so as to carry out a use test. As a result, the obtained quilt cover was superior in antislip property to that of Comparative Example 1. The cloth “a” was sewed to the inner surface on the human side of the quilt cover at the time of sleeping and positioned along the both sides of the quilt. The area ratio of the part composed of the cloth “a” was 4.7%.

The cloth “a” was attached to the rear surface on the human side (quilt side) at the time of sleeping, had a length which was the same as the width of one side of the quilt cover and a width of 10 cm and placed at positions 30 cm away from the upper end and the lower end of the quilt cover.

A commercially available quilt (side cloth: 100% of polyester fibers, inner cotton: 100% of polyester fibers) was inserted into the quilt cover and tapes in the quilt cover for fixing the quilt were not used to evaluate antislip property by using the quilt at the time of sleeping. As a result, 16 testers evaluated the antislip property as grade 3 (rarely slip), 3 testers evaluated it as grade 2 (may slip by a large movement) and 1 tester evaluated it as grade 1 (may slip by a small movement). 16 testers out of 20 did not feel the slippage of the quilt in the cover and could sleep well.

After the quilt cover was washed, its functionality remained satisfactory, use of the tapes for fixing the quilt was not necessary, and the work efficiency of attaching and detaching the quilt cover was excellent.

Comparative Example 1

Evaluation was made in the same manner as in Example 1 except that the cloth “a” was not sewed to a quilt cover. The friction resistance was 24 cN. 2 testers evaluated antislip property as grade 3 (rarely slip), 5 testers evaluated it as grade 2 (may slip by a large movement), and 12 testers evaluated it as grade 1 (may slip by a small movement). A quilt slipped a lot while sleeping so that testers felt uncomfortable and could not sleep well.

Example 2

The procedure of Example 1 was repeated except that the width of the cloth “a” was changed to 30 cm and the cloth “a” was placed at the ends of the quilt cover. The testers did not feel the slippage of the quilt in the quilt cover and could sleep comfortably.

Example 3

The procedure of Example 1 was repeated except that the width of the cloth “a” was changed to 25 cm and the cloth “a” was placed at the ends of the quilt cover. The testers did not feel the slippage of the quilt in the quilt cover and could sleep comfortably.

Example 4

The procedure of Example 1 was repeated except that the width of the cloth “a” was changed to 20 cm and the cloth “a” was placed at the ends of the quilt cover. The testers did not feel the slippage of the quilt in the quilt cover and could sleep comfortably.

Example 5

The procedure of Example 1 was repeated except that the width of the cloth “a” was changed to 20 cm and the cloth “a” was placed at positions 15 cm away from the upper and lower ends of the quilt cover. The testers did not feel the slippage of the quilt in the quilt cover and could sleep comfortably.

Example 6

The procedure of Example 1 was repeated except that the width of the cloth “a” was changed to 15 cm and the cloth “a” was placed at positions 15 cm away from the upper and lower ends of the quilt cover. The testers did not feel the slippage of the quilt in the quilt cover and could sleep comfortably.

Effect of the Invention

The quilt cover of the present invention makes difficult the slippage of a quilt in the quilt cover without impairing the lightweight and softness of the quilt cover.

INDUSTRIAL APPLICABILITY

According to the present invention, there is provided a quilt cover which makes difficult the slippage of a quilt in the quilt cover without impairing the lightweight and softness of the quilt cover and which is of great industrial value.

Claims

1. A quilt cover having a part composed of cloth “a” containing fibers “A” having a monofilament diameter of 10 to 10,000 nm.

2. The quilt cover according to claim 1, wherein when the quilt cover is opened, the part is arranged on the rear side of the quilt cover and has an area ratio to the rear surface of not less than 3%.

3. The quilt cover according to claim 2, wherein the part has an area ratio to the rear surface of 3 to 40%.

4. The quilt cover according to claim 1, wherein the fibers “A” have a monofilament diameter of 10 to 1,000 nm.

5. The quilt cover according to claim 1, wherein the part has a width of 5 to 100 cm and a length of 50 to 200 cm.

6. The quilt cover according to claim 1, wherein the part is sewed or bonded to the quilt cover.

7. The quilt cover according to claim 6, wherein the part is sewed or bonded to the rear surface on a human side and/or the rear surface on an outer side of the quilt cover.

8. The quilt cover according to claim 6, wherein the part is sewed or bonded to a position 0 to 50 cm away from the end of the quilt cover.

9. The quilt cover according to claim 6, wherein the part is sewed or bonded to a plurality of sites.

10. The quilt cover according to claim 1, wherein the fibers “A” are long fibers, each having not less than 500 filaments.

11. The quilt cover according to claim 1, wherein the fibers “A” are yarn obtained by dissolving and removing the sea component of sea-island type composite fibers composed of a sea component and an island component.

12. The quilt cover according to claim 1, wherein the fibers “A” are made of polyester.

13. The quilt cover according to claim 1, wherein the cloth “a” further contains fibers “B” having a monofilament diameter larger than 10,000 nm.

14. The quilt cover according to claim 1, wherein the cloth “a” is woven, knitted or nonwoven cloth.