JP2007296031A - Spread - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a bulky spread which hardly occurs permanently deformation caused by repeated compression, is excellent in flexibility and drying characteristics and also is excellent in sense of use. <P>SOLUTION: In the spread 1, both surfaces of a core material 10 made of an elastic foam 10a are covered with a facing material 21 and the facing material 21 is locked to the core material 10 by a binding part 31. In the spread 1, by a plurality of roughly parallel cuts 11 passing through the upper and lower surfaces of the elastic foam 10a, parts 13 between the plurality of roughly parallel cuts are formed in the state of being connected to each other near both ends of the parts 13 between the cuts, and the parts 13 between the plurality of cuts are twisted to the opposite side of the elastic foam 10a alternately and raised on the surface of the elastic foam 10a. The parts 13 between the cuts adjacent to each other are locked in the state that one of the ends brought close to each other by the twist is put on the other. A part 17 raised by the twist is formed at two or more parts in the planar elastic foam. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a laying material laid on a mattress, a futon or the like.

  Conventionally, as a laying material to be laid on a mattress, a futon, etc., a core material made of a fiber material subjected to bulk processing is covered with a skin material, or a core material made of a flat elastic foam is covered with a skin material. There are things.

  When a fiber material is used as a core material, a laying material that is generally excellent in air permeability can be obtained, but it is inferior in cushioning properties, tends to cause permanent deformation (easy to sag) by repeated compression, and maintains the bulkiness at the beginning of use. Is difficult.

  On the other hand, when an elastic foam is used as the core material, there are advantages in that it is superior in cushioning properties compared to the case of using a fiber material and hardly undergoes permanent deformation even when repeatedly compressed (hardened).

  In addition, the laying material may need to be washed in the same manner as costumes. Regarding the washability, when a fiber material is used as the core material of the laying material, it is possible to wash the laying material in the same manner as general clothing, and it is excellent to the extent that it has a drying property. On the other hand, when an elastic foam is used as the core material of the laying material, there is a problem that the moisture retention is higher than that when the fiber material is used as the core material and the drying property is inferior. Furthermore, since the elastic foam generally has higher rigidity than the fiber material, it is difficult to say that it is easy to wash the laying cloth having the elastic foam as a core at home. In addition, the surface of the elastic foam that has been made bulky by uneven processing (uneven cutting processing or profile processing) is superior in tactile sensation compared to a flat surface (thickness is equal), A product with good bottoming (less feeling of bottoming) can be obtained, but in terms of flexibility, it is still inferior to a fiber material product and inferior to washing.

  As described above, a laying material using a fiber material as a core material and a laying material using an elastic foam as a core material have advantages and disadvantages in permanent deformation due to repeated compression, flexibility and drying properties that affect washability.

JP-A-9-215557 Utility Model Registration No. 3020685

  The present invention has been made in view of the above points, and it is an object of the present invention to provide a laying tool that hardly causes permanent deformation due to repeated compression, has good flexibility and drying property, and is bulky and excellent in feeling of use.

  The invention according to claim 1 is the laying material in which both surfaces of the core material made of the elastic foam are covered with the skin material, and the elastic foam has a plurality of substantially parallel cuts by a plurality of substantially parallel cuts penetrating the upper and lower surfaces. The intermediate portions are provided in a state of being connected to each other in the vicinity of both ends of the incised portion, and the adjacent incised portions of the plurality of incised portions are twisted toward the opposite side of the plate-like elastic foam. The elastic foam is raised on the surface of the elastic foam, and the elastic foam is locked to the skin material on both sides.

  According to a second aspect of the present invention, in the first aspect, the elastic foam has a three-dimensional network shape from which the cell film is removed.

  A third aspect of the invention is characterized in that, in the first or second aspect, the elastic foam is made of a polyurethane foam having 10 to 50 cells / 25 mm.

  A fourth aspect of the present invention is characterized in that, in any one of the first to third aspects, the method of locking the elastic foam to the skin material comprises quilting by sewing.

  According to the laying tool of the first aspect of the present invention, the elastic foam constituting the core material has a plurality of substantially parallel cuts penetrating the upper and lower surfaces so that a plurality of substantially parallel cut portions are near both ends of the cut portions. In the state where they are connected to each other, with respect to the plurality of incised portions, the adjacent incised portions are twisted to the opposite sides of the plate-like elastic foam and raised on the surface of the plate-like elastic foam. The presence of the part can increase the body pressure dispersibility by improving the body pressure dispersibility, improve the feeling of use, and increase the flexibility and increase the air permeability by making multiple cuts that penetrate the upper and lower surfaces of the elastic foam. Since the effect of increasing the drying property at the time of washing is obtained, the washability of the laying device becomes good. Moreover, the elastic foam constituting the core material of the laying material of the present invention is bulky by twisting a plurality of parallel incisions, unlike the bulky material by uneven processing (uneven cutting processing or profile processing). Therefore, by increasing the bulk, the weight does not increase, the weight and flexibility are excellent, and handling during washing and the like is easy. Furthermore, since the elastic foam which comprises a core material is latched by the skin material of both surfaces, the shift | offset | difference of a skin material and a core material can be prevented at the time of use or washing. Moreover, since the elastic foam which comprises the core material in the laying material of this invention is hard to produce the permanent deformation property by repeated compression compared with a fiber raw material, durability of a laying material improves.

  According to the laying tool of the invention of claim 2, since the elastic foam constituting the core material has a three-dimensional network shape from which the cell membrane has been removed, the breathability of the elastic foam constituting the core material is further improved, Drying at the time of washing becomes better. In addition, since the elastic foam constituting the core material has a three-dimensional network shape from which the cell membrane has been removed, and the surface has a high frictional resistance, the adjacent substantially parallel incisions are in contact with each other by twisting. There is also an effect that the frictional locking force becomes large and the twist is difficult to return.

  According to the laying tool of the invention of claim 3, since the elastic foam is made of polyurethane foam having 10 to 50 cells / 25 mm, the air permeability of the elastic foam itself becomes good while having sufficient strength. The drying property during washing can be improved.

  According to the laying tool of the invention of claim 4, since the method of locking the elastic foam to the skin material is formed by quilting by sewing, the elastic foam can be securely locked to the skin material with good appearance.

  Hereinafter, embodiments of the present invention will be described in detail. 1 is a schematic perspective view of a laying tool according to an embodiment of the present invention, FIG. 2 is a sectional view of a section raised in the laying tool of the same embodiment, FIG. 3 is a schematic perspective view of a core material in the same embodiment, 4 is a schematic plan view of a section raised by twisting in the concentric material, FIG. 5 is a cross-sectional view taken along line 5-5 of FIG. 4, and FIG. FIG. 3 is a partial cross-sectional view showing an elastic foam before twisting a portion between cuts in the same embodiment.

  1 and 2, the both sides of the core material 10 are covered with the skin material 21, and the core material 10 is locked to the both surface skin materials 21 by the binding portions 31 provided at a plurality of positions. It consists of a structure and is laid on a mattress or a futon.

  The said core material 10 consists of a plate-shaped elastic foam 10a, as shown in FIG.2 and FIG.3. The elastic foam 10a is preferably a polyurethane foam. Polyurethane foam is a mold conveyor in which a mixed reaction solution is filled and injected into a mold having a predetermined shape, and then mold-cured and cured in the mold, or a two-component reaction mixture solution at room temperature and atmospheric pressure is transferred to a belt conveyor. It may be any of slab foams that are discharged and foam-cured and then cut into a predetermined shape. In addition, the commercially available thing manufactured by the well-known technique can be used for the polyurethane slab foam. The thickness of the elastic foam 10a (the thickness of the substantially flat portion) is 3 to 30 mm, particularly preferably 5 to 20 mm. If it is less than 3 mm, it is too thin to be suitable as a laying tool. On the other hand, if it exceeds 30 mm, the weight of the laying material 1 becomes large, so that washing and handling become difficult, and it takes time for dehydration and drying during washing.

The elastic foam 10a may be an appropriate one, but is particularly preferably a three-dimensional network having a cell film removed by a known film removal process (for example, a dissolution process). By forming the three-dimensional network from which the cell membrane has been removed, the air permeability is improved, and the dehydrating property and the drying property when the laying tool 1 is washed are improved. The number of cells of the elastic foam 10a is preferably 10 to 50/25 mm, more preferably 15 to 30/25 mm. The elastic foam 10a having the number of cells in this range has particularly good dewaterability and drying properties when the laying tool 1 is washed. When the number of cells is less than 10 cells / 25 mm, not only the strength of the elastic foam 10a is significantly reduced during the formation of the cuts 11 described later and the twisting of the inter-cut portions 13, but the cells become rough. The feel of the elastic foam 10a is stiff and the laying tool 1 is not preferable for bedding. On the other hand, when the number of cells exceeds 50 cells / 25 mm, the cells become fine and the dehydrating property and drying property of the elastic foam 10a when the laying tool 1 is washed become inferior. The elastic foam 10a constituting the core material 10 of the laying tool 1 is made of a polyurethane foam regardless of whether the elastic foam 10a is formed into a three-dimensional network by film removal treatment or a normal one not subjected to film removal treatment. When it does, in order to make lightweight property and air permeability (dryness) favorable, a thing with a density of 15-50 kg / m < ³ > is preferable.

  As shown in FIGS. 4 and 5, a plurality of substantially parallel cuts 11 penetrating the upper and lower surfaces are formed in the elastic foam 10 a, and a portion sandwiched between the adjacent cuts 11, that is, a cut portion 13. Are provided in a state of being connected to each other in the vicinity of both ends without being bonded together. Reference numeral 19 denotes a connecting portion in the vicinity of both ends of the notch portion 13. The cut portion 11 is not formed in the connecting portion 19. In the illustrated example, the connecting portion 19 is formed in a diamond-shaped frame shape, and a plurality of portions surrounded by the diamond-shaped frame-shaped connecting portion 19 are provided in the elastic foam 10a at predetermined intervals.

  The interval between the notches 11, that is, the width d of the portion 13 between the notches is appropriately determined, and an example is about 5 to 30 mm. As shown in FIGS. 5 and 6, the plurality of inter-cut portions 13 are formed by twisting adjacent cut portions 13 a and 13 b toward the opposite side of the plate-like elastic foam 10 a, that is, the plurality of inter-cut portions 13. Are alternately twisted to the upper side and the lower side of the plate-like elastic foam 10a, and are raised on the upper surface and the lower surface of the plate-like elastic foam 10a. In the illustrated example, of the adjacent notch portions 13a and 13b, one of the notch portions 13a is twisted toward the upper surface side of the plate-like elastic foam 10a and is raised on the upper surface side, and the other notch portion 13b is plate-like. The elastic foam 10a is twisted toward the lower surface side and raised on the lower surface side. The portion 17 raised by the twist is formed for each section surrounded by the connecting portion 19 having a rhombus frame shape, and thereby the raised portions 17 are provided at a plurality of locations of the plate-like elastic foam 10a. . In addition, although the length of the part 13 between the cuts in each said division is taken as appropriate, about 10-200 mm is mentioned as an example. If it is shorter than 10 mm, it becomes difficult to sufficiently form the overlap of the end portions 16a and 16b due to twisting in the incision portion 13 and the twisting easily returns. On the other hand, if it is longer than 200 mm, the incision portion 13 Twist tends to be irregular, and when the inter-cut portion 13 is twisted, it tends to break due to a decrease in strength. Furthermore, since the surface design of the laying tool 1 can be designed by the raised portion 17, the cut is made according to the required design (for example, in the example shown, the planar shape of the raised portion 17 is a rhombus). In general, the length of the intermediate portion 13 (the length of the notch 11) is changed. The notches 11 are formed by an appropriate method such as pressing or a roller with a blade. In FIG. 7, the elastic foam 10a before twisting the said notch part 13 (13a, 13b) is shown.

  In the portion 17 raised by the twist, every other portion 13 between the cuts is twisted to one side of the plate-like elastic foam 10a, and the portion between the cuts is twisted to the opposite side. In the incision portion 13, a gap 18 is formed between the adjacent portions, and the incision portion 13 is not adhered, so that the cell is not blocked by the adhesive, and excellent air permeability is obtained. Further, since the raised portion 17 in the elastic foam 10a is formed without adhesion, there is no increase in weight due to the adhesive, no increase in rigidity due to the curing of the adhesive, and low rigidity due to the notch 11. Therefore, it is possible to make it bulky about 1.5 to 2.5 times with the same weight as compared with a flat elastic foam having no cut. As a result, it is possible to obtain a highly breathable and flexible core material 10 that cannot be obtained with a conventional elastic foam with a flat surface or an elastic foam with an uneven surface by profile processing or the like. It is possible to obtain a bulky litter 1 that has good drying properties and is light in handling during washing.

  Further, as shown in FIGS. 5 and 6, the adjacent notch portions 13a and 13b are engaged in a state where one of the end portions 16a and 16b approaching each other by twisting rides on the other 16b at the center portion. The torsion of the notch portion 13 is not easily eliminated. Therefore, even if the laying tool 1 is compressed by use or the like, twisting of the incision portion 13 is difficult to be eliminated, and excellent air permeability and body pressure dispersibility can be maintained. The portions to be locked may be appropriately connected by an adhesive or the like. In the illustrated example, one of the end portions 16a and 16b close to each other rides on the other, and the adjacent notch portions 13a and 13a are a set of two adjacent notch portions 13a and 13b. Thus, a plurality of incision portions 13 are divided into a plurality of groups, and the end portions 16a and 16b that are close to each other are locked in each group. The end is not locked.

  The skin material 21 is made of an appropriate material that does not hinder flexibility and air permeability. Examples of the material of the skin material 21 include a knitted fabric and a woven fabric. Moreover, since the said skin material 21 is a site | part which approaches the body most at the time of sleeping etc., what consists of a material excellent in durability with the hygroscopic property (sweat-absorbing property) with respect to the water | moisture content emitted from the body is preferable. Examples of materials having good hygroscopicity include cellulose fibers such as cotton and rayon. Moreover, the polyester fiber which is a chemical fiber can be mentioned as a material excellent in durability. Further, if a blended material such as a blend of polyester fiber and cellulosic natural fiber, recycled fiber and chemical fiber, or blended knitting is used, a product excellent in durability and moisture absorption (sweat absorption) can be obtained. The surface material 21 may be a bag body in which the core material 10 is accommodated in the bag body, or the skin material 21 is disposed on both surfaces of the core material 10 to surround the skin material 21. May be formed by sewing or when the skin material 21 is heat-weldable, it may be joined by heat-welding to form a bag.

  The binding portion 31 locks the skin material 21 on both surfaces (upper surface and lower surface) of the core material 10 to the core material 10, and the core material 10 (that is, the elastic material) when the laying tool 1 is used or washed. The method is not particularly limited as long as the position of the foam 10a) and the skin material 21 is prevented from being shifted and the locking is possible. For example, it may be by sewing or by a locking means such as a button or clip, or may be by heat welding when the skin material 21 is heat welding. In the illustrated example, the binding portion 31 has the core material 10 (the elastic foam 10a) locked to the skin material 21 on both surfaces of the core material 10 by quilting by sewing, and the sewing thread is used for the both surfaces. The outer skin material 21 and the core material 10 are penetrated. In addition, the binding portion 31 has a position and an interval that can effectively prevent the misalignment of the core material 10 and the skin material 21 when the laying tool 1 is used or washed, and the size and work of the laying tool 1 can be reduced. It is determined at an appropriate position depending on the sex. In particular, the binding portion 31 is provided at a position avoiding the raised portion 17 of the elastic foam 10a constituting the core member 10, and the raised portion 17 is prevented from being compressed by the binding portion 31, and the bulkiness is reduced. It is preferable not to do so. In the illustrated example, the binding portion 31 is located on the connecting portion 19 having a rhombus frame shape around the raised portion 17.

  Cover the core materials A to D shown in Table 1 with a bag-shaped skin material (fabric: Aqua Job, manufactured by Asahi Kasei products, pile and base fabric 50% cotton / 50% polyester), and bind the skin material The laying tools of Examples 1 to 4 and Comparative Examples 1 to 3 were produced by locking to the core material. Core material A is polyurethane foam, product number: CF-ERG20X, manufactured by Inoac Corporation, Core material B is polyurethane foam, product number: CF-ERG-H, manufactured by Inoac Corporation, core material C is polyurethane foam, Product number: ERG-H, manufactured by Inoac Corporation, core material D is polyurethane foam, product number: ECS, manufactured by Inoac Corporation. Moreover, the planar size of core material AD is 1200 mm x 2000 mm. In Examples 1 to 4, plate-like polyurethane foams A to D are provided with a plurality of sections surrounded by the connecting portion 19 having a rhombus frame shape with a side length of 110 mm, with a center interval of 140 mm. The cuts 11 were formed in parallel at intervals of 5 mm, and 30 sections 13 were provided in the section. The length of the incision portion 13 in each section is 10 to 130 mm. Twist the incision portions 13 formed by the incisions alternately to the opposite side of the plate-like polyurethane foam, and for adjacent incision portions, either one of the end portions that are close to each other by twisting to the other It was locked while riding. Thereby, the part which protruded by twist was formed for each division on both sides of the plate-like polyurethane foam, and it was set as the core material of the Example. About the core material of Comparative Examples 1-3, it was set as the flat thing of the flat surface, without performing formation of a cut and twist. Moreover, about Examples 1-4, the binding part was formed in the state similar to FIG. 1 by sewing the connection part around the said protruding part by a quilt process. On the other hand, about Comparative Examples 1-3, the binding part was formed by the quilt process in the position of the substantially same space | interval as the binding part of Examples 1-4. The density, hardness, and number of cells in Table 1 are all measured values based on JIS K 6400.

  With respect to the laying tools of Examples 1 to 4 and Comparative Examples 1 to 3, the overall weight, packaging properties, washing / drying properties, flexibility / feel, and feeling of bottoming were examined. The results are as shown in the lower part of Table 1.

  Package property indicates whether or not the workability when folding the laying implement and storing it in the net and washing is good. If the laying piece can be folded in four, it is ○, and if it cannot be folded, ×, A case where the workability is remarkably poor due to the rebound restoring force is shown as Δ. All of Examples 1 to 4 had good package properties (◯), while Comparative Examples 1 to 3 having no notches and twists had poor package properties (× to Δ).

  Washing / drying properties were measured as follows. First, the example product and the comparative product were washed with a coin laundry laundry machine (product number: WE-165, manufactured by IPSO) and dehydrated automatically. Thereafter, the weight was measured even after being left indoors for 24 hours. The ratio of the weight after standing for 24 hours / the weight before washing is less than 110% (％), the case of 110% or more and less than 120% is good (◯), the case of 120% or more and less than 130% Slightly bad (Δ), 130% or more of cases were determined as bad (x). In Examples 1 to 4, washing and drying properties were the best (◎) to good (○). In particular, Examples 1 and 2 using the core materials A and B from which the cell membrane had been removed were the best (）) with a washability / dryness of less than 110%. On the other hand, Comparative Examples 1 to 3 having no notch formation and twisting were poor to somewhat poor (× to Δ) in washing and drying properties.

  The softness and tactile sensation were judged by grasping the surface of the example product and the comparative product with the palm. In this case, it is best if it can be easily gripped and the return is quick after releasing the grip (◎), it takes a little force to grip, and the return is quick after releasing the grip is good ( ○) A case where a considerable force was required to grip and the return after the release of the grip was slow was regarded as slightly bad (△). Examples 1-4 were the best ((double-circle))-favorable ((circle)) in the softness | flexibility and tactile property. On the other hand, Comparative Examples 1 to 3 having no notch formation and twisting were slightly inferior in flexibility and touch (Δ).

The feeling of bottoming was judged based on a feeling after 5 minutes had passed since a male with a height of 172 cm and a weight of 50 kg slept on his back on an example product and a comparative product directly laid on a wooden floor. The case where there was no bottom feeling was good (◯), the case where there was a slight bottom feeling was slightly bad (Δ), and the case where there was a clear bottom feeling was judged as bad (X). In addition, when the core material D having a low density of 22 kg / cm ³ was used, in Example 4 where there was a notch and a bulge due to torsion, the feeling of bottoming was slightly felt (Δ), while the notch and In Comparative Example 3 where there was no bulging due to twisting, the bottom was clearly felt (×). From this, it can be seen that the bulge caused by the cut and twist is effective in preventing a feeling of bottoming and effective in improving the feeling of use as a laying tool.

  For these reasons, the laying material of the present invention has good flexibility, tactile sensation, and drying properties, is excellent in washability, is bulky and light in weight, does not easily give a feeling of bottoming, and has excellent usability. I know that there is. Moreover, since the core material is made of an elastic foam, the laying material of the present invention is less likely to cause permanent deformation due to repeated compression and has excellent durability.

It is a schematic perspective view of the laying implement concerning one embodiment of the present invention. It is sectional drawing of one division raised in the laying tool of the embodiment. It is a schematic perspective view of the core material in the same embodiment. It is a schematic plan view of one division which protruded by twisting in the same core material. FIG. 5 is a sectional view taken along line 5-5 in FIG. 4. It is a partially cutaway schematic perspective view of a raised part in the same core material. It is a fragmentary sectional view which shows the elastic foam before twisting the part between notches in the same embodiment.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Covering material 10 Core material 10a Elastic foam 11 Notch 13 Incision part 13a, 13b Adjacent notch part 16a, 16b End part which mutually approached by twist 17 Raised part 19 Connection part 21 Skin material 31 Binding part

Claims (4)

In the laying material in which both surfaces of the core material (10) made of the elastic foam (10a) are covered with the skin material (21),
In the elastic foam (10a), a plurality of substantially parallel cut portions (13) are connected to each other in the vicinity of both ends of the cut portion (13) by a plurality of substantially parallel cuts (11) penetrating the upper and lower surfaces. In the plurality of inter-cut portions (13), adjacent inter-cut portions (13a, 13b) are twisted toward the opposite side of the plate-like elastic foam (10a), and the plate-like elastic foam is provided. Raised on the surface of the body (10a),
A laying tool characterized in that the elastic foam (10a) is locked to the skin material (21) on both sides.   The litter according to claim 1, wherein the elastic foam (10a) has a three-dimensional net shape from which a cell membrane has been removed.   The litter according to claim 1 or 2, wherein the elastic foam (10a) is made of a polyurethane foam having 10 to 50 cells / 25 mm. The litter according to any one of claims 1 to 3, wherein the method of locking the elastic foam (10a) to the skin material (21) comprises quilting by sewing.

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