Nonwoven composite sheet

Abstract

To provide a nonwoven fabric composite sheet which is suitable for personal use and has a good touch.SOLUTION: A nonwoven fabric composite sheet 10 used for personal use includes a bubble cushioning material layer 11 and an air-through nonwoven fabric layer 12 laminated on at least one surface of the bubble cushioning material layer 11.SELECTED DRAWING: Figure 1

Description

[Technical Field]

[0001] The present invention relates to a nonwoven composite sheet for personal use. [Background technology]

[0002] Patent Document 1 describes a protective packaging device that is arranged to wrap around the outer periphery of a transported item. The protective packaging device is described as comprising air bubble packaging material and elastic members fixed to the air bubble packaging material at predetermined intervals. The use of air bubble packaging material allows the protective packaging device to be lightweight and inexpensive to produce. Furthermore, the document describes that the contents of the transported item can be visually confirmed. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent No. 4461249 Summary of the Invention [Problem to be solved by the invention]

[0004] However, the protective packaging material in Patent Document 1 is intended for use in packaging transported items, and is not intended for use on people. There is a demand for a nonwoven fabric composite sheet that is comfortable to the touch and suitable for use on people. [Means for solving the problem]

[0005] The nonwoven fabric composite sheet of embodiment 1 comprises a bubble cushioning layer and an air-through nonwoven fabric layer laminated on at least one surface of the bubble cushioning layer, and is used for personal use. Aspect 2 is the nonwoven fabric composite sheet of Aspect 1, wherein the density of the air-through nonwoven fabric layer is 0.1 g / cm 3 is less than.

[0006] A third aspect is the nonwoven fabric composite sheet according to the first or second aspect, wherein the air-through nonwoven fabric layer has a thickness of 300 μm or more. A fourth aspect of the present invention is the nonwoven fabric composite sheet according to any one of the first to third aspects, wherein the coefficient of friction of the bubble cushioning material layer is at least 0.5 higher than the coefficient of friction of the through-air nonwoven fabric layer.

[0007] A fifth aspect is the nonwoven fabric composite sheet according to any one of the first to fourth aspects, wherein the bubble cushioning material layer and the air-through nonwoven fabric layer are bonded together with a hot melt adhesive.

[0008] A sixth aspect is the nonwoven fabric composite sheet according to any one of the first to fifth aspects, which is for nursing care. [Effects of the Invention]

[0009] According to the present invention, a nonwoven fabric composite sheet that is comfortable to the touch and suitable for personal use can be provided. [Brief explanation of the drawings]

[0010] [Figure 1] FIG. 1 is a schematic diagram of a cross section of a nonwoven fabric composite sheet. [Figure 2] FIG. 2 is a perspective view of an embodiment in which the nonwoven fabric composite sheet is used as a bed mat. [Figure 3] FIG. 3 is a perspective view of an embodiment in which the nonwoven fabric composite sheet is used in a protector. DETAILED DESCRIPTION OF THE INVENTION

[0011] An embodiment of the nonwoven fabric composite sheet of the present invention will be described. As shown in FIG. 1, the nonwoven fabric composite sheet 10 comprises a bubble cushioning layer 11 and an air-through nonwoven fabric layer 12 laminated on at least one surface of the bubble cushioning layer 11 .

[0012] <Bubble cushioning material> The term "bubble cushioning material" refers to a cushioning material having air bubbles sealed inside. The bubble cushioning material may include, for example, two layers of synthetic resin sheets 11a and 11b bonded together, and a bubble layer 11c in which air is sealed between the two layers of synthetic resin sheets 11a and 11b.

[0013] As shown in Figure 1, one surface (the lower surface in Figure 1) of the bubble cushioning material that makes up bubble cushioning layer 11 is flat and made up of a single layer of synthetic resin sheet 11a, while the other surface (the upper surface in Figure 1) has multiple irregularities caused by another single layer of synthetic resin sheet 11b containing multiple bubble layers 11c.

[0014] Although the shape and number of bubble layers 11c are not particularly limited, it is preferable that bubble layers 11c have a circular shape in a plan view.Furthermore, it is preferable that the bubble cushioning material has a plurality of bubble layers 11c at approximately equal intervals between two synthetic resin sheets 11a and 11b.

[0015] The diameter of the circular bubble layer 11c is not particularly limited, but is preferably 10 mm or more, more preferably 20 mm or more, and even more preferably 30 mm or more. When the diameter of the bubble layer 11c is 10 mm or more, the size of each bubble layer 11c becomes larger, which tends to improve the cushioning properties of the bubble cushioning material.

[0016] The height of the air bubble layer 11c is not particularly limited, but is preferably 3 mm or more, more preferably 5 mm or more, even more preferably 8 mm or more, and still more preferably 10 mm or more. When the height of the air bubble layer 11c is 3 mm or more, the cushioning properties of the air bubble cushioning material tend to be improved.

[0017] Specific examples of the bubble cushioning material that can be used include known bubble cushioning materials such as BuchiPuchi (registered trademark) manufactured by Kawakami Sangyo Co., Ltd. and MinaPack (registered trademark) manufactured by Sakai Chemical Industry Co., Ltd.

[0018] <Air-through nonwoven fabric> An air-through nonwoven fabric refers to a nonwoven fabric manufactured by the air-through manufacturing method. The air-through manufacturing method refers to a method of manufacturing a nonwoven fabric by subjecting a web in which multiple fibers are overlapped in a sheet-like form to a hot air treatment to bond the fibers together. This refers to a nonwoven fabric in which the fibers are bonded together by thermal bonding. Compared to spunlace nonwoven fabrics, in which the nonwoven fabric is manufactured by blowing air or water onto a web to entangle the fibers together, air-through nonwoven fabrics are bulkier and have the characteristic of making it easier to improve the softness of the nonwoven fabric. Improved softness of the nonwoven fabric results in a pleasant feel against the skin.

[0019] The density of the air-through nonwoven fabric layer 12, i.e., the density of the air-through nonwoven fabric in the laminated state as the nonwoven fabric composite sheet 10, is not particularly limited, but is preferably 0.1 g / cm 3 More preferably, it is less than 0.05 g / cm 3 Density is 0.1 g / cm or less. 3 If it is less than this, the softness of the air-through nonwoven fabric layer 12 tends to be improved.

[0020] The thickness of the air-through nonwoven fabric layer 12 is not particularly limited, but is preferably 300 μm or more, more preferably 500 μm or more, even more preferably 700 μm or more, and even more preferably 900 μm or more. When the thickness of the air-through nonwoven fabric layer 12 is 300 μm or more, the cushioning properties of the air-through nonwoven fabric layer 12 are likely to be improved. The water absorption of the air-through nonwoven fabric layer 12 can also be improved. The sound absorption of the air-through nonwoven fabric layer 12 can also be improved. When the nonwoven fabric composite sheet 10 includes the bubble cushioning layer 11, the bubble cushioning may rub against each other during use, causing a rustling sound. When the thickness of the air-through nonwoven fabric layer 12 is 300 μm or more, the noise of the nonwoven fabric composite sheet 10 during use can be further reduced.

[0021] The fibers used for the air-through nonwoven fabric are not particularly limited, but fibers with a core-sheath structure are preferred because they facilitate the production of nonwoven fabrics by thermal bonding. An example of a fiber with a core-sheath structure is a fiber with a core / sheath structure of PET / PE. PET stands for polyethylene terephthalate, and PE stands for polyethylene.

[0022] The fiber thickness is not particularly limited, but is preferably 8 dtex or less, more preferably 5 dtex or less, and even more preferably 3 dtex or less. When the fiber thickness is 8 dtex or less, the softness of the air-through nonwoven fabric tends to be improved.

[0023] As shown in Figure 1, the nonwoven fabric composite sheet 10 of this embodiment is produced by bonding the above-mentioned bubble cushioning material and an air-through nonwoven fabric. There are no particular restrictions on the surface of the bubble cushioning material to which the air-through nonwoven fabric is bonded, but bonding the air-through nonwoven fabric to an uneven surface of the bubble cushioning material is preferred because this makes it easier to improve softness when the air-through nonwoven fabric is used as the side that comes into contact with the human body.

[0024] The method for joining the bubble cushioning material and the air-through nonwoven fabric is not particularly limited, and any known joining method can be used. For example, the bubble cushioning material and the air-through nonwoven fabric can be joined using a known hot-melt adhesive. A hot-melt adhesive is an adhesive that is bonded by applying heat to melt the material, and is made of a thermoplastic synthetic resin such as ethylene vinyl acetate (EVA). Because hot-melt adhesives do not contain organic solvents, they are environmentally friendly and can be used more safely. Furthermore, because they can be used at relatively low heating temperatures, the impact of heating on the bubble cushioning material and the air-through nonwoven fabric can be reduced. As the hot-melt adhesive, for example, a sheet-type hot-melt adhesive is preferably used because it makes it easy to join the bubble cushioning material and the air-through nonwoven fabric.

[0025] As shown in FIG. 1, by joining the bubble cushioning material and the air-through nonwoven fabric, the nonwoven fabric composite sheet 10 is formed in a state in which the bubble cushioning material layer 11 and the air-through nonwoven fabric layer 12 are laminated.

[0026] In the nonwoven fabric composite sheet 10, the coefficient of friction of the surface of the bubble cushioning material layer 11 (the lower surface in Figure 1) is not particularly limited, but it is preferably at least 0.5 higher than the coefficient of friction of the surface of the air-through nonwoven fabric layer 12 (the upper surface in Figure 1).

[0027] 2, if the coefficient of friction of bubble cushioning layer 11 is 0.5 or more higher than the coefficient of friction of air-through nonwoven fabric layer 12, bubble cushioning layer 11 can be made relatively less slippery when nonwoven fabric composite sheet 10 is used as mat 14 of bed 13. When nonwoven fabric composite sheet 10 is used as mat 14 of bed 13, the bubble cushioning layer 11 side of nonwoven fabric composite sheet 10 is placed so as to contact bed 13.

[0028] In the nonwoven fabric composite sheet 10, the bubble cushioning layer 11 that comes into contact with the bed 13 can be made less slippery than the air-through nonwoven fabric layer 12 that comes into contact with the human body, so that displacement of the nonwoven fabric composite sheet 10 can be more effectively suppressed.

[0029] Furthermore, as shown in Figure 3, if the coefficient of friction of bubble cushioning layer 11 is at least 0.5 greater than the coefficient of friction of air-through nonwoven fabric layer 12, it becomes easier to adjust the position of nonwoven fabric composite sheet 10 when used as protector 15. When using nonwoven fabric composite sheet 10 as protector 15, nonwoven fabric composite sheet 10 is wrapped around protector 15 so that bubble cushioning layer 11 of nonwoven fabric composite sheet 10 is positioned on the outer periphery. Then, fixing member 16 such as tape is attached to protector 15 so that it maintains its cylindrical shape.

[0030] For example, when nonwoven fabric composite sheet 10 is attached as protector 15 to the elbow, knee, waist, etc. of a human body, it becomes easier to grip bubble cushioning layer 11 located on the outer periphery of nonwoven fabric composite sheet 10. Therefore, it becomes easier to adjust the position of nonwoven fabric composite sheet 10 by gripping bubble cushioning layer 11.

[0031] The method for measuring the coefficient of friction is not particularly limited, and any known measurement method can be used. For example, the average coefficient of friction (also referred to as MIU) can be measured using a known texture tester (KES-FB3-A, manufactured by Kato Tech Co., Ltd.).

[0032] <Applications of nonwoven composite sheets> The nonwoven fabric composite sheet 10 is not particularly limited in its use, and can be used appropriately for applications requiring cushioning properties. For example, it can be used for nursing care, medical care, disaster response, sports, leisure, etc. Specifically, it can be used as a mat 14 in a nursing care bed. It can also be used as a protector 15 or supporter for nursing care. The nonwoven fabric composite sheet 10 of this embodiment can be provided inexpensively and is therefore disposable. In other words, it can be used for disposable applications.

[0033] In the present invention, "for personal use" means use on people in the above-mentioned caregiving and other applications. <Action and effect> The operation and effects of this embodiment will be described.

[0034] (1) The nonwoven fabric composite sheet 10 comprises a bubble cushioning layer 11 and an air-through nonwoven fabric layer 12 laminated on at least one surface of the bubble cushioning layer 11, and is used for personal use. Air-through nonwoven fabrics are easy to improve in softness and therefore tend to have a pleasant feel against the skin. Therefore, by providing the nonwoven fabric composite sheet 10 with the air-through nonwoven fabric layer 12, it is possible to provide a nonwoven fabric composite sheet 10 that is pleasant to the touch and suitable for use in personal applications. Furthermore, air bubble cushioning materials and air-through nonwoven fabrics are generally lightweight and available at low cost. Therefore, it is possible to provide a lightweight and inexpensive nonwoven fabric composite sheet 10. It can also be used in disposable applications.

[0035] (2) The density of the air-through nonwoven fabric layer 12 is 0.1 g / cm 3 The density of the air-through nonwoven fabric layer 12 is less than 0.1 g / cm 3 If it is less than this, the softness of the through-air nonwoven fabric layer 12 is likely to be improved, and therefore the feel of the nonwoven fabric composite sheet 10 against the skin is likely to be improved.

[0036] (3) The thickness of the air-through nonwoven fabric layer 12 is 300 μm or more. This improves the cushioning properties of the air-through nonwoven fabric layer 12. Furthermore, the sound absorption properties of the air-through nonwoven fabric layer 12 can be improved, thereby reducing noise during use of the nonwoven fabric composite sheet 10. Furthermore, the water absorption properties of the air-through nonwoven fabric layer 12 can be improved.

[0037] (4) In the nonwoven fabric composite sheet 10, the coefficient of friction of the bubble cushioning layer 11 is at least 0.5 higher than the coefficient of friction of the air-through nonwoven fabric layer 12. When the nonwoven fabric composite sheet 10 is used as a mattress 14 of a bed 13, it becomes possible to use the nonwoven fabric composite sheet 10 in a state in which displacement of the nonwoven fabric composite sheet 10 is more suitably suppressed. Furthermore, when the nonwoven fabric composite sheet 10 is used as a protector 15 or a supporter, it becomes easier to grasp the nonwoven fabric composite sheet 10 from the outside and adjust its position.

[0038] (5) In the nonwoven fabric composite sheet 10, the bubble cushioning layer 11 and the air-through nonwoven fabric layer 12 are bonded together with a hot melt adhesive. This makes it environmentally friendly and safer to use. In addition, the heating temperature required for bonding using a hot melt adhesive can be lowered, which reduces the impact of heat on the bubble cushioning layer 11 and the air-through nonwoven fabric layer 12.

[0039] (6) The nonwoven fabric composite sheet 10 can be used for nursing care. Because the air-through nonwoven fabric is water-absorbent, it can be used as a bed mattress 14, for example, in a position that comes into contact with an area where a bedsore has developed. It can also be used as a protector 15, for example, to prevent injuries when an elderly person falls. The nonwoven fabric composite sheet 10 of this embodiment is lightweight, making it easy for elderly people to use.

[0040] <Example of change> This embodiment can be modified as follows: This embodiment and the following modifications can be combined and implemented within the scope of technical compatibility.

[0041] Although the nonwoven fabric composite sheet 10 of this embodiment is intended for use on humans, it may also be used on other living creatures. Examples of other living creatures include pets, livestock, and wild animals. That is, it may also be used for animals. For example, it may be used for caring for pets, livestock, wild animals, and the like.

[0042] In the nonwoven fabric composite sheet 10, the density of the air-through nonwoven fabric layer 12 is 0.1 g / cm 3 It may be more than that. The coefficient of friction of the bubble cushioning layer 11 may be less than 0.5 relative to the coefficient of friction of the air-through nonwoven fabric layer 12 .

[0043] The bubble cushioning layer 11 and the air-through nonwoven fabric layer 12 may be joined by a material other than a sheet-like hot melt adhesive. A non-sheet-like hot melt adhesive may be used, or an adhesive other than a hot melt adhesive may be used.

[0044] In this embodiment, the nonwoven fabric composite sheet 10 has an air-through nonwoven fabric bonded to the uneven surface of the bubble cushioning material, but this is not limited to this. The air-through nonwoven fabric may be bonded to the flat surface of the bubble cushioning material. The air-through nonwoven fabric may be bonded to both the uneven surface and the flat surface of the bubble cushioning material.

[0045] In the present embodiment, the bubble cushioning material includes one synthetic resin sheet 11a and another synthetic resin sheet 11b attached to the first sheet 11a, the second synthetic resin sheet 11b containing multiple bubble layers 11c. However, the present invention is not limited to this. The bubble cushioning material may include a third synthetic resin sheet attached to the synthetic resin sheet 11b containing multiple bubble layers 11c. In other words, the bubble cushioning material may have a three-layer structure.

[0046] In the nonwoven fabric composite sheet 10, the bubble cushioning material layer 11 may be formed by laminating two or more layers of bubble cushioning material. Similarly, the air-through nonwoven fabric layer 12 may be formed by laminating two or more layers of air-through nonwoven fabric.

[0047] The nonwoven fabric composite sheet 10 may further include another layer in addition to the bubble cushioning layer 11 and the air-through nonwoven fabric layer 12. For example, a reinforcing layer may be provided on the surface of the bubble cushioning layer 11 opposite to the air-through nonwoven fabric layer 12 side.

[0048] The nonwoven fabric composite sheet 10 may have a layer other than an adhesive between the bubble cushioning layer 11 and the air-through nonwoven fabric layer 12. For example, a nonwoven fabric layer other than an air-through nonwoven fabric may be present between the bubble cushioning layer 11 and the air-through nonwoven fabric layer 12. In other words, the nonwoven fabric composite sheet 10 is not limited to an embodiment in which the bubble cushioning layer 11 and the air-through nonwoven fabric layer 12 are directly laminated together via an adhesive. [Example]

[0049] Examples will be given below to more specifically explain the configuration and effects of the present invention, but the present invention is not limited to these examples. Example 1 As shown in Table 1, Bubble Wrap #80 manufactured by Kawakami Sangyo Co., Ltd. was prepared as the bubble cushioning material. The diameter of the circular bubble layer 11c in the bubble cushioning material was approximately 32 mm, and the height of the bubble layer 11c was approximately 13 mm. An air-through nonwoven fabric was also prepared using a PET / PE core / sheath fiber with a thickness of 2.4 dtex. A known hot melt adhesive was placed between the textured surface of the bubble cushioning material and the air-through nonwoven fabric to bond the bubble cushioning material and the air-through nonwoven fabric. Nonwoven fabric composite sheet 10 of Example 1 was produced using the above procedure.

[0050] (Examples 2 to 4, Comparative Examples 1 to 3) The air-through nonwoven fabric was changed as shown in Table 1 to prepare a nonwoven fabric composite sheet. In Comparative Example 1, a nonwoven fabric made by the spunlace method using rayon fiber and pulp was used instead of the air-through nonwoven fabric.

[0051] In Comparative Example 2, paper made from unbleached pulp was used instead of the air-through nonwoven fabric. In Comparative Example 3, a cotton woven fabric was used instead of the air-through nonwoven fabric.

[0052] [Table 1] (Evaluation test) The basis weight, thickness, and density of the air-through nonwoven fabric layer were measured for the nonwoven fabric composite sheets of Examples 1 to 4 and Comparative Examples 1 to 3. The average coefficient of friction between the bubble cushioning layer and the air-through nonwoven fabric layer was also measured. The average coefficient of friction was measured using a texture tester KES-FB3-A manufactured by Kato Tech Co., Ltd. The measurement conditions were a speed of 1.0 mm / sec and a static load of 50 g.

[0053] The softness and cushioning of the air-through nonwoven fabric layer in the nonwoven fabric composite sheet were also evaluated. The softness and cushioning were evaluated by sensory evaluation by five monitors. The five monitors actually touched the nonwoven fabric composite sheet and evaluated the surface softness and cushioning when pressed on a scale of 1 to 5, and the average score was calculated. The higher the score, the higher the evaluation. Evaluation was based on the following evaluation criteria. Furthermore, based on the evaluation of softness and cushioning, an overall evaluation of the feel on the skin was also performed using the following evaluation criteria. The results are shown in Table 1.

[0054] "Excellent softness" means that the air-through nonwoven fabric layer feels smooth to the touch. "Excellent cushioning" means that the air-through nonwoven fabric layer has appropriate elasticity when pressed. "Excellent feel" means that the air-through nonwoven fabric layer has both excellent softness and excellent cushioning.

[0055] Softness and cushioning evaluation criteria A (Excellent): 4.0 points or above B (Good): 3.0 points or more and less than 4.0 points C (Fail): Less than 3.0 points Overall evaluation (feel) criteria ◎ (Excellent): When both softness and cushioning are rated A ○ (Good): When one of the softness and cushioning ratings is A and the other is B × (Fail): When at least one of the softness and cushioning ratings is C As can be seen from Table 1, Example 1 was excellent in both softness and cushioning. Examples 2 to 4 were excellent in either softness or cushioning, and good in the other. Comparative Examples 1 and 3 were excellent in softness but poor in cushioning. Comparative Example 2 was poor in both softness and cushioning. [Explanation of symbols]

[0056] 10...Nonwoven composite sheet, 11...Bubble cushioning layer, 12...Air-through nonwoven layer, 13...Bed, 14...Mat, 15...Protector, 16...Fixing member.

Claims

1. A nonwoven fabric composite sheet for personal use, comprising a bubble cushioning layer and an air-through nonwoven fabric layer laminated on at least one surface of the bubble cushioning layer.

2. The density of the air-through nonwoven fabric layer is 0.1 g / cm ３ The nonwoven fabric composite sheet according to claim 1, wherein the tensile strength is less than 1 / 2.

3. 2. The nonwoven fabric composite sheet according to claim 1, wherein the air-through nonwoven fabric layer has a thickness of 300 μm or more.

4. 2. The nonwoven fabric composite sheet according to claim 1, wherein the coefficient of friction of the bubble cushioning material layer is at least 0.5 higher than the coefficient of friction of the air-through nonwoven fabric layer.

5. 2. The nonwoven fabric composite sheet according to claim 1, wherein the bubble cushioning material layer and the air-through nonwoven fabric layer are bonded together with a hot melt adhesive.

6. The nonwoven fabric composite sheet according to any one of claims 1 to 5, which is for nursing care.

Images