JP4746486B2 - Disposable body warmer - Google Patents
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- JP4746486B2 JP4746486B2 JP2006170952A JP2006170952A JP4746486B2 JP 4746486 B2 JP4746486 B2 JP 4746486B2 JP 2006170952 A JP2006170952 A JP 2006170952A JP 2006170952 A JP2006170952 A JP 2006170952A JP 4746486 B2 JP4746486 B2 JP 4746486B2
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- 239000000835 fiber Substances 0.000 claims description 87
- 239000004745 nonwoven fabric Substances 0.000 claims description 87
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 58
- 239000005022 packaging material Substances 0.000 claims description 51
- 239000000203 mixture Substances 0.000 claims description 30
- 238000010521 absorption reaction Methods 0.000 claims description 18
- 230000035699 permeability Effects 0.000 claims description 16
- 229920005992 thermoplastic resin Polymers 0.000 claims description 11
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 7
- 229910052760 oxygen Inorganic materials 0.000 claims description 7
- 239000001301 oxygen Substances 0.000 claims description 7
- 238000007254 oxidation reaction Methods 0.000 claims description 5
- 230000003647 oxidation Effects 0.000 claims description 4
- 239000000843 powder Substances 0.000 claims description 2
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 38
- -1 cupra Polymers 0.000 description 15
- 229920000728 polyester Polymers 0.000 description 15
- 238000000034 method Methods 0.000 description 14
- 229920000297 Rayon Polymers 0.000 description 10
- 239000002964 rayon Substances 0.000 description 10
- 238000009833 condensation Methods 0.000 description 8
- 230000005494 condensation Effects 0.000 description 8
- 239000004831 Hot glue Substances 0.000 description 7
- 230000002209 hydrophobic effect Effects 0.000 description 7
- 239000000463 material Substances 0.000 description 7
- 230000005540 biological transmission Effects 0.000 description 6
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 5
- 238000010998 test method Methods 0.000 description 5
- VGGSQFUCUMXWEO-UHFFFAOYSA-N Ethene Chemical compound C=C VGGSQFUCUMXWEO-UHFFFAOYSA-N 0.000 description 4
- 239000004743 Polypropylene Substances 0.000 description 4
- 229920001577 copolymer Polymers 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 229920001684 low density polyethylene Polymers 0.000 description 4
- 239000004702 low-density polyethylene Substances 0.000 description 4
- 238000005259 measurement Methods 0.000 description 4
- 239000002245 particle Substances 0.000 description 4
- 229920001155 polypropylene Polymers 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 239000000853 adhesive Substances 0.000 description 3
- 230000001070 adhesive effect Effects 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- UXVMQQNJUSDDNG-UHFFFAOYSA-L Calcium chloride Chemical compound [Cl-].[Cl-].[Ca+2] UXVMQQNJUSDDNG-UHFFFAOYSA-L 0.000 description 2
- 239000004677 Nylon Substances 0.000 description 2
- 239000001110 calcium chloride Substances 0.000 description 2
- 229910001628 calcium chloride Inorganic materials 0.000 description 2
- 229920002678 cellulose Polymers 0.000 description 2
- 239000001913 cellulose Substances 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 230000007423 decrease Effects 0.000 description 2
- 230000004069 differentiation Effects 0.000 description 2
- 239000010419 fine particle Substances 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 230000020169 heat generation Effects 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 238000010792 warming Methods 0.000 description 2
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- 229920000742 Cotton Polymers 0.000 description 1
- 229920000433 Lyocell Polymers 0.000 description 1
- 229920001407 Modal (textile) Polymers 0.000 description 1
- 229920002292 Nylon 6 Polymers 0.000 description 1
- 229920002302 Nylon 6,6 Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- MYEJFUXQJGHEQK-ALRJYLEOSA-N Proscillaridin Chemical compound O[C@@H]1[C@H](O)[C@@H](O)[C@H](C)O[C@H]1O[C@@H]1C=C2CC[C@H]3[C@@]4(O)CC[C@H](C5=COC(=O)C=C5)[C@@]4(C)CC[C@@H]3[C@@]2(C)CC1 MYEJFUXQJGHEQK-ALRJYLEOSA-N 0.000 description 1
- 230000008901 benefit Effects 0.000 description 1
- 210000001217 buttock Anatomy 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000004043 dyeing Methods 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 239000012943 hotmelt Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 239000012968 metallocene catalyst Substances 0.000 description 1
- 238000004806 packaging method and process Methods 0.000 description 1
- 229920003207 poly(ethylene-2,6-naphthalate) Polymers 0.000 description 1
- 229920000747 poly(lactic acid) Polymers 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 229920001748 polybutylene Polymers 0.000 description 1
- 229920001707 polybutylene terephthalate Polymers 0.000 description 1
- 239000011112 polyethylene naphthalate Substances 0.000 description 1
- 229920000139 polyethylene terephthalate Polymers 0.000 description 1
- 239000005020 polyethylene terephthalate Substances 0.000 description 1
- 239000004626 polylactic acid Substances 0.000 description 1
- 229920000098 polyolefin Polymers 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 230000007480 spreading Effects 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000032258 transport Effects 0.000 description 1
- 238000009423 ventilation Methods 0.000 description 1
Description
本発明は、使い捨てカイロに関し、さらに詳しくは、肌触り、柔軟性の優れ、特に、使用時のカイロ表面に、発熱組成物に由来する錆汚れが発現しにくい使い捨てカイロに関する。 The present invention relates to a disposable body warmer, and more particularly, to a disposable body warmer that is excellent in touch and flexibility, and in particular, is less susceptible to rust stains derived from a heat-generating composition on the surface of the body warmer during use.
従来、使い捨てカイロとしては、例えば、揉むカイロ、貼るカイロ等として、スパンボンド不織布とフィルムとを積層した包材を用いたカイロが一般的である。特に、ナイロンのスパンボンド不織布を用いた使い捨てカイロは、強度、柔軟性、耐熱性、寸法安定性などに優れており、カイロの主要素材ととして用いられている。
しかしながら、スパンボンド不織布は一般的に、嵩高性がやや不足する傾向であり、使用時において、包材が薄く感じられ、ふくらみ感がやや不足している。そこで、カイロ用包材として、更に、嵩高で、ソフトな感触性、肌触り性の向上が期待されている。
Conventionally, as a disposable warmer, for example, a warmer using a wrapping material in which a spunbonded nonwoven fabric and a film are laminated is used as a warming warmer, a warming warmer or the like. In particular, disposable body warmers using nylon spunbonded nonwoven fabrics are excellent in strength, flexibility, heat resistance, dimensional stability, and the like, and are used as main materials for warmers.
However, the spunbonded nonwoven fabric generally has a tendency to be slightly lacking in bulkiness, and when used, the packaging material feels thin and the feeling of swelling is slightly lacking. Therefore, as a packaging material for warmers, further improvement in bulkiness, soft touch, and touch is expected.
特許文献１には、セルロース系短繊維を水流交絡で製造した不織布が、肌触り、保水性に優れたカイロ用表面材として用いることが開示されている。しかし、セルロース系短繊維からなる不織布では、保水性に優れる故に使用時にカイロ表面が、発熱組成物の酸化によって発生した錆によって汚れてしまうことがあるという問題がある。
本発明は、上記従来技術の問題点を解決し、肌触り、柔軟性に優れ、嵩高でソフトな感触を持ち、且つ、使用時にカイロ表面に発熱組成物に由来する錆汚れが発現しにくい使い捨てカイロを提供することを目的とする。 The present invention solves the above-mentioned problems of the prior art, is a disposable warmer that has excellent touch and flexibility, has a bulky and soft feel, and is less susceptible to rust stains derived from the heat-generating composition on the surface of the warmer when used. The purpose is to provide.
使い捨てカイロは、一般に、空気中の酸素が発熱組成物、主に鉄紛を酸化することによって発熱を開始する。その結果、発熱により、発熱組成物中に含まれる水分が揮発して、カイロ内部は蒸気が充満した高温多湿環境となる。蒸気は包材の内部表面を構成するフィルムに結露、また一部はフィルムの通気孔を通って不織布層内に拡散する。この時、蒸気の一部は不織布を構成する繊維に吸収されるか、または繊維表面で結露し、繊維表面が濡れた状態になると、結露水を運搬し易い親水性の環境、すなわち繊維間隙が構成する毛細管からなる水の通り道を作る。一方、発熱組成物の酸化によって発生した鉄錆の微粒子は結露水に溶け込む。ここで結露水が包材の内部表面を構成するフィルムの通気孔を通ってカイロ外部表面を構成する不織布に接すると、錆の微粒子を含んだまま不織布層内を拡散し、カイロ表面に錆の汚れを発現させてしまう。 Disposable warmers generally start to generate heat when oxygen in the air oxidizes the exothermic composition, mainly iron powder. As a result, due to heat generation, water contained in the heat generating composition is volatilized, and the inside of the warmer becomes a high-temperature and high-humidity environment filled with steam. The vapor condenses on the film constituting the inner surface of the packaging material, and part of the vapor diffuses into the nonwoven fabric layer through the vents of the film. At this time, when a part of the vapor is absorbed by the fibers constituting the nonwoven fabric or dew condensation occurs on the fiber surface and the fiber surface becomes wet, a hydrophilic environment that easily transports dew condensation water, that is, the fiber gap Make a water path consisting of the capillaries that make up. On the other hand, fine particles of iron rust generated by oxidation of the exothermic composition dissolve in the condensed water. Here, when condensed water comes into contact with the nonwoven fabric constituting the outer surface of the warmer through the air vents of the film constituting the inner surface of the packaging material, the inside of the nonwoven fabric layer diffuses while containing the rust fine particles, and rust is formed on the surface of the warmer. Dirt is developed.
本発明者らは、上記の錆発生の機構を解明し、課題を達成するために鋭意検討した結果、不織布側からの吸水速度と、透湿性とを限定したカイロ用包材を用いることで、錆汚れの発現を防止出来るカイロを発明するに至った。すなわち、本発明は、下記のとおりである。
三次元的交絡によって一体化された不織布と通気性の熱可塑性樹脂フィルムとが積層された包材と、該熱可塑性樹脂フィルム側で該包材に収容された、少なくとも空気中の酸素により酸化発熱する粉体と水分とを含む発熱組成物とを備えた使い捨てカイロであって、該包材の該不織布側からの吸水速度は１秒以上であり、かつ、透湿度は５０〜５０００ｇ／ｍ２・２４ｈｒであり、該不織布を構成する親水性繊維の混用率は６０ｗｔ％以下であり、該不織布の目付は２５〜１００ｇ／ｍ ２ であり、該不織布は親水性繊維混用率の異なる層から形成され、そして親水性繊維率のより小さい層の表面に該熱可塑性樹脂フィルムが積層されていることを特徴とする、前記使い捨てカイロ。
As a result of elucidating the mechanism of rust generation and earnestly achieving the problem, the present inventors have used a warmer packaging material that limits the water absorption rate from the nonwoven fabric side and moisture permeability, It came to invent the warmer which can prevent the expression of rust stains. That is, the present invention is as follows.
A thermoplastic resin film of the integrated nonwoven fabric and passing temper by three-dimensionally entangled and is laminated packaging material, housed in該包material with thermoplastic resin film side, oxidation heat generated by oxygen of at least the air A disposable body warmer comprising a powder to be heated and a heat generating composition containing moisture , wherein the water absorption rate of the packaging material from the nonwoven fabric side is 1 second or more, and the moisture permeability is 50 to 5000 g / m 2. · 24 hr or der is, mix ratio of the hydrophilic fibers constituting the nonwoven fabric is less 60 wt%, basis weight of the nonwoven fabric is 25~100g / m 2, the nonwoven fabric from different layers of the hydrophilic fiber mix ratio The disposable warmer characterized in that the thermoplastic resin film is laminated on the surface of a layer formed and having a lower hydrophilic fiber ratio .
本発明によれば、肌触り、柔軟性の優れ、且つ使用時にカイロ表面に発熱組成物に由来する錆汚れが付かない使い捨てカイロを提供することができる。 ADVANTAGE OF THE INVENTION According to this invention, the disposable warmer which is excellent in the touch and the softness | flexibility, and does not attach the rust stain derived from a heat-generating composition on the warmer surface at the time of use can be provided.
本発明のカイロの包材は、不織布側からの吸水速度が１秒以上である必要があり、好ましくは１．５秒以上、より好ましくは、２〜１０００秒である。吸水速度は、ＪＩＳＬ−１９０７記載の適下法によって測定する。吸水速度が１秒以上であると、不織布の親水性は弱く、発熱組成物に含まれる水分が揮発して、カイロ内部で発生した蒸気がフィルムの通気孔を通って不織布層内に拡散する時、繊維表面で結露しても結露水は濡れ広がらず、包材袋の内部表面の結露水が不織布の繊維に添って移動することにより作られる水の通り道が出来ない。
このため、袋内部表面の結露水に溶け込んだ、発熱組成物に由来する鉄錆の粒子も不織布内に浸透して来ず、カイロ表面に発熱組成物に由来する錆汚れが付かない使い捨てカイロが出来る。
In the packaging material of the warmer of the present invention, the water absorption rate from the nonwoven fabric side needs to be 1 second or more, preferably 1.5 seconds or more, more preferably 2 to 1000 seconds. The water absorption rate is measured by an appropriate method described in JISL-1907. When the water absorption rate is 1 second or more, the hydrophilicity of the nonwoven fabric is weak, and the moisture contained in the exothermic composition volatilizes, and the vapor generated inside the warmer diffuses into the nonwoven fabric layer through the vents of the film. Even if dew condensation occurs on the fiber surface, the dew condensation water does not spread and the water formed by moving the dew condensation water on the inner surface of the packaging bag along with the fibers of the nonwoven fabric cannot be formed.
For this reason, iron rust particles derived from the exothermic composition dissolved in the dew condensation water on the inner surface of the bag do not penetrate into the nonwoven fabric, and a disposable body warmer that does not have rust stains derived from the exothermic composition on the surface of the warmer I can do it.
一方、吸水速度が１秒未満の場合、不織布の親水性が強すぎて、袋内部で発生した蒸気が不織布側に通過するときに不織布を構成する繊維表面で結露して濡れ広がり、袋内部表面で発生した結露水が染み出してきた時、不織布のフィルム面側から表面側まで水の通り道を作ってしまい、カイロとして使用すると不織布の表面に発熱組成物に由来する錆の粒子が移送され、表面に錆による赤茶色の斑点の汚れが出来てしまうことがある。 On the other hand, when the water absorption rate is less than 1 second, the nonwoven fabric is too hydrophilic, and when the vapor generated inside the bag passes to the nonwoven fabric side, it dew-condenses and spreads on the fiber surface constituting the nonwoven fabric. When the dew condensation water generated in oozes out, it creates a path for water from the film surface side to the surface side of the nonwoven fabric, and when used as a warmer, rust particles derived from the exothermic composition are transferred to the surface of the nonwoven fabric, The surface may be stained with reddish brown spots due to rust.
本発明のカイロの包材は、透湿度が５０〜５０００ｇ／ｍ２・２４ｈｒである必要があり、好ましくは透湿度１００〜４０００ｇ／ｍ２・２４ｈｒ、さらに好ましくは１０００〜３０００ｇ／ｍ２・２４ｈｒである。透湿度はＪＩＳＬ−１０９９ 塩化カルシウム法（Ａ−１法）記載の方法で測定する。
透湿度５０ｇ／ｍ２・２４ｈｒ未満の場合、外部の空気中の酸素により酸化発熱するための酸素透過性も低下してしまうので、カイロとして十分な酸素透過性が得られなくなる。
Cairo packaging material of the present invention, moisture permeability must be 50~5000g / m 2 · 24hr, preferably moisture permeability 100~4000g / m 2 · 24hr, further preferably 1000~3000g / m 2 · 24hr It is. The moisture permeability is measured by the method described in JISL-1099 calcium chloride method (A-1 method).
When the moisture permeability is less than 50 g / m 2 · 24 hr, oxygen permeability for heat generation due to oxygen in the outside air also decreases, so that sufficient oxygen permeability as a warmer cannot be obtained.
一方、透湿度５０００ｇ／ｍ２・２４ｈｒを超える場合、短時間に包材を通過する酸素量が多くなり、発熱組成物の酸化反応一気に進むため、内部温度が高くなりすぎ、短時間内に大量の蒸気が発生し、該蒸気が不織布内部だけでなく、不織布表面と接触する衣服などの表面でも結露し、衣服を濡らしてしまう。またカイロとして最高温度が高く、高温維持時間が短くなってしまうので、カイロとして不向きとなる。なお測定表面のフィルム部の一部のみに針孔加工されているサンプルは、有孔部の透湿度を測定した。 On the other hand, when the water vapor permeability exceeds 5000 g / m 2 · 24 hr, the amount of oxygen passing through the packaging material increases in a short time, and the oxidation reaction of the exothermic composition proceeds at a stretch. Vapor is generated, and the vapor condenses not only inside the nonwoven fabric but also on the surface of the clothing such as the clothing contacting with the nonwoven fabric surface and wets the clothing. Moreover, since the maximum temperature is high as a warmer and the high temperature maintenance time is shortened, it is not suitable as a warmer. In addition, the moisture permeability of the perforated part was measured for the sample in which the needle hole was processed only in a part of the film part on the measurement surface.
本発明のカイロにおける不織布を構成する親水性繊維の混用率が６０ｗｔ％以下が好ましく、５０ｗｔ％以下がより好ましく、４０ｗｔ％以下がさらに好ましい。親水性繊維の混用率が、６０ｗｔ％を超えると、吸水速度が速くなり、繊維層内部で結露した結露水が濡れ広がって水の通り道を作ることを防止することが困難である。繊維の混用率は、ＪＩＳＬ−１０３０−２記載の試験方法によって測定することが出来る。 The mixing ratio of the hydrophilic fibers constituting the nonwoven fabric in the warmer of the present invention is preferably 60 wt% or less, more preferably 50 wt% or less, and further preferably 40 wt% or less. When the mixing ratio of the hydrophilic fibers exceeds 60 wt%, the water absorption speed is increased, and it is difficult to prevent the condensed water condensed inside the fiber layer from spreading and forming a water passage. The fiber mixture ratio can be measured by the test method described in JISL-1030-2.
本発明に用いる不織布は、目付が２５〜１００ｇ／ｍ２であることが好ましく、３０〜８０ｇ／ｍ２であるとさらに好ましい。２５ｇ／ｍ２未満であると、繊維の表面積が少なすぎ、冷えきらない蒸気が不織布の外側に放出されるため、使用状況によっては不織布の外側に接触する衣服などの表面で結露し、結露水が不織布に浸透して濡れた状態にしてしまい、錆を含んだ袋内部の結露水が導き出されてしまうことがある。目付が１００ｇ／ｍ２を超えると、不織布全体が厚くなりすぎ、内部の発熱体の熱が伝わるのが遅く、カイロとして適さない。 Nonwoven fabric used in the present invention preferably has a basis weight is 25~100g / m 2, further preferably at 30 to 80 g / m 2. If it is less than 25 g / m 2 , the surface area of the fiber is too small, and vapor that cannot be cooled is released to the outside of the nonwoven fabric. May penetrate into the non-woven fabric and become wet, leading to dew condensation water inside the bag containing rust. If the basis weight exceeds 100 g / m 2 , the whole nonwoven fabric becomes too thick, and the heat of the internal heating element is slow to be transmitted, which is not suitable as a warmer.
本発明の親水性の繊維とは、繊維表面に結露水が濡れ広がる繊維である。判定方法として、該繊維１００％で作られた不織布の適下法による吸水速度が１秒未満だと親水性繊維とみなす。親水性繊維の種類は特に限定されないが、コットン、レーヨン、リヨセル、キュプラ、ポリノジック等である。 The hydrophilic fiber of the present invention is a fiber in which condensed water spreads on the fiber surface. As a determination method, if the water absorption speed by the proper method of a nonwoven fabric made of 100% of the fibers is less than 1 second, it is regarded as a hydrophilic fiber. The type of hydrophilic fiber is not particularly limited, and examples thereof include cotton, rayon, lyocell, cupra, and polynosic.
本発明の不織布を構成する繊維において、親水性繊維ではない繊維としては、疎水性繊維が好ましい。疎水性繊維とは、繊維表面に結露水が濡れ広がらない繊維であり、水分は、実質的に濡れ広がらず、蒸発して吸収されない。判断の指標として公定水分率５％未満の繊維が好ましく、例えばポリエチレン、ポリプロピレン、共重合ポリプロピレンなどのポリオレフィン系繊維、ポリエチレンテレフタレート、ポリブチレンテレフタレート、ポリエチレンナフタレート、共重合ポリエステルなどのポリエステル系繊維、ナイロン-6、ナイロン-66、共重合ナイロンなどのポリアミド系繊維、鞘がポリエチレン、ポリプロピレン、共重合ポリエステル、芯がポリプロピレン、ポリエステルなどの組み合わせから成る芯鞘構造等の複合繊維、ポリ乳酸、ポリブチレンサクシネート、ポリエチレンサクシネートなどの生分解性繊維、アクリル系繊維などを用いることが出来る。特に親水性繊維と混合し易いポリエステル系繊維が好ましい。繊維としては、単独でもよく、又２種以上の繊維を混合または積層して用いることもできる。繊維の断面形状としては、丸型の他に、扁平型、C型、Y型、V型などの異形断面などを用いることが出来る。 In the fibers constituting the nonwoven fabric of the present invention, hydrophobic fibers are preferred as the fibers that are not hydrophilic fibers. Hydrophobic fibers are fibers in which condensed water does not wet and spread on the fiber surface, and moisture does not substantially wet and spread and is not absorbed by evaporation. Fibers with an official moisture content of less than 5% are preferable as an index for judgment, for example, polyolefin fibers such as polyethylene, polypropylene, copolymer polypropylene, polyester fibers such as polyethylene terephthalate, polybutylene terephthalate, polyethylene naphthalate, copolymer polyester, nylon -6, polyamide fiber such as nylon-66, copolymer nylon, etc., composite fiber such as core-sheath structure consisting of a combination of polyethylene, polypropylene, copolymer polyester, core is polypropylene, polyester, etc., polylactic acid, polybutylene sushi Biodegradable fibers such as nates and polyethylene succinates, acrylic fibers, and the like can be used. In particular, polyester fibers that are easily mixed with hydrophilic fibers are preferred. The fibers may be used alone, or two or more kinds of fibers may be mixed or laminated. As the cross-sectional shape of the fiber, in addition to the round shape, a flat cross-section, a C-shape, a Y-shape, a V-shape, etc. can be used.
本発明における三次元的交絡によって一体化された不織布の製造方法は、特に限定されないが、例えば水流による流体絡合を用いることが出来る。流体絡合の条件は、ノズル径０．０５〜０．５ｍｍ、ノズル間隔を０．２〜１０ｍｍになるよう配置し、１〜１５ＭＰａの水流が好ましい。
本発明における不織布の繊維径は、三次元的交絡によって一体化出来るならば特に限定は無いが、７〜３０μｍが三次元的交絡によって一体化し易く柔軟性もあるので好ましい。
Although the manufacturing method of the nonwoven fabric integrated by the three-dimensional entanglement in this invention is not specifically limited, For example, the fluid entanglement by a water flow can be used. The fluid entanglement conditions are such that the nozzle diameter is 0.05 to 0.5 mm and the nozzle interval is 0.2 to 10 mm, and a water flow of 1 to 15 MPa is preferable.
The fiber diameter of the nonwoven fabric in the present invention is not particularly limited as long as it can be integrated by three-dimensional entanglement, but 7 to 30 μm is preferable because it can be easily integrated by three-dimensional entanglement and has flexibility.
本発明における不織布は、袋内部の蒸気の一部がフィルムの通気孔を通って不織布内に拡散，結露し濡れ広がって、袋内表面で結露した別の一部の結露水が発熱体中の細かな錆粒子を溶かし込んでフィルムの通気孔を通って不織布に接触した時、毛細管現象によって不織布表面まで移送されることを防ぐことが重要である。従って、不織布内部でフィルムとの接着面側からカイロ表面側にまで、厚み方向に繋がる親水性繊維は少ないことが好ましい。 In the nonwoven fabric of the present invention, part of the vapor inside the bag diffuses through the film vents, condenses and spreads in the nonwoven fabric, and another part of the condensed water condensed on the inner surface of the bag is contained in the heating element. It is important to prevent fine rust particles from being transported to the nonwoven fabric surface by capillarity when they are brought into contact with the nonwoven fabric through the film vents. Therefore, it is preferable that few hydrophilic fibers are connected in the thickness direction from the adhesive surface side to the warmer surface side inside the nonwoven fabric.
また、フィルムの通気孔周辺が親水性繊維でなければ、フィルム内の結露水は不織布内部に進入し難いので、錆の出る確率が低くなる。このことより、不織布の親水性繊維率が表裏異なる場合は、親水性繊維率が小さい表面に熱可塑性樹脂フィルムが積層された包材からなるカイロが好ましい。不織布の両表面における親水性繊維率の違いは、不織布全体での親水性繊維のＪＩＳＬ−１０３０−２記載の試験方法による混用率Ｐａと、フィルムと積層していない表面すなわちカイロ表面に相当する不織布表面に占める親水性繊維の比率Ｐｓを比較して、Ｐａ＜Ｐｓであれば、フィルムと積層する側の親水性繊維率が小さいと判断できる。 Moreover, if the surroundings of the ventilation holes of the film are not hydrophilic fibers, the condensed water in the film is difficult to enter the nonwoven fabric, so that the probability of rusting decreases. From this, when the hydrophilic fiber ratios of the nonwoven fabrics are different from each other, a warmer made of a packaging material in which a thermoplastic resin film is laminated on a surface having a small hydrophilic fiber ratio is preferable. The difference in the hydrophilic fiber ratio on both surfaces of the nonwoven fabric is that the nonwoven fabric corresponds to the mixed ratio Pa of the hydrophilic fiber in the entire nonwoven fabric according to the test method described in JISL-1030-2 and the surface not laminated with the film, that is, the warmer surface. Comparing the ratio Ps of hydrophilic fibers occupying the surface, if Pa <Ps, it can be determined that the hydrophilic fiber ratio on the side laminated with the film is small.
本発明における親水性繊維率が表裏異なる不織布の製造方法として、親水性繊維率が比較的少ない層と多い層を重ねて三次元交絡しても良い。フィルムとの接着面側に疎水性繊維のみからなる不織布を用いることも、接着面に接する親水性繊維の比率が小さく出来るので好ましい。疎水性繊維のみからなる不織布としては、スパンボンド法による不織布が、薄くても強力があるので好ましい。 As a method for producing a nonwoven fabric having different hydrophilic fiber ratios in the present invention, a layer having a relatively low hydrophilic fiber ratio and a layer having a relatively large hydrophilic fiber ratio may be overlapped for three-dimensional entanglement. It is also preferable to use a non-woven fabric consisting only of hydrophobic fibers on the adhesive surface side with the film because the ratio of hydrophilic fibers in contact with the adhesive surface can be reduced. As the nonwoven fabric composed only of hydrophobic fibers, a nonwoven fabric by a spunbond method is preferable because it is strong even if thin.
本発明における不織布と熱可塑性樹脂フィルムとが積層された包材の接着方法は特に限定されないが、熱可塑性樹脂を直接不織布上に押出しラミネートする、熱可塑性樹脂よりなるフィルムと不織布を押出しした熱可塑性樹脂で貼り合わせる、熱可塑性樹脂よりなるフィルムと不織布を繊維状のホットメルト剤で貼り合わせる等の方法を用いることが出来る。 The method for adhering the packaging material in which the nonwoven fabric and the thermoplastic resin film are laminated in the present invention is not particularly limited, but the thermoplastic resin is directly extruded onto the nonwoven fabric and laminated, and the thermoplastic resin film and the nonwoven fabric are extruded. A method such as bonding with a resin or bonding a film made of a thermoplastic resin and a nonwoven fabric with a fibrous hot melt agent can be used.
以下、本発明について、実施例を挙げて更に詳細に説明するが、本発明は実施例に特に限定されるものではない。尚、実施例における測定方法および評価方法は次の通りである。
(1) 目付
ＪＩＳＬ−１９０６記載の試験方法を使用して測定した。
(2) 混用率
ＪＩＳＬ−１０３０−２記載の試験方法を使用して各素材の混用率を求めた。また混用率と全体の目付から、各素材の目付を求めた。
(3) 吸水速度（適下法）
ＪＩＳＬ−１９０７記載の試験方法を使用して測定した。
EXAMPLES Hereinafter, although an Example is given and this invention is demonstrated further in detail, this invention is not specifically limited to an Example. In addition, the measuring method and evaluation method in an Example are as follows.
(1) Weight per unit area Measured using the test method described in JISL-1906.
(2) Mixed rate The mixed rate of each raw material was calculated | required using the test method of JISL-1030-2. In addition, the basis weight of each material was obtained from the mixed rate and the overall basis weight.
(3) Water absorption rate (appropriate method)
It measured using the test method of JISL-1907.
(4) 透湿度
ＪＩＳＬ−１０９９ 塩化カルシウム法（Ａ−１法）を使用して、包材サンプルのフィルム面がカップ内面になるようにセットして測定した。なお測定表面中、フィルム部の一部のみに針孔加工されているサンプルは、針孔加工された有孔部の範囲を有孔面積として換算した。すなわち、有孔面積Ａａ，測定面積Ａｃ，測定した透湿度Ｈｃのとき、有孔部の透湿度Ｈａは、次式で求められる。
Ｈａ＝Ｈｃ×（Ａｃ／Ａａ） （式１）
有孔面積は、隣接する針孔同士で区切られる、針孔１個が存在する単位面積と測定表面中に存在する針孔の個数の積で求められる。
(5) 不織布表面に移行する錆汚れモデルテスト
継続的に水分を供給し、水分中に錆の粒子が含まれるカイロ内容物モデルとして、キリバイ（桐灰化学（社製））「貼るカイロ」の内容物に、水４０重量％を加えて１分攪拌し、実質的な遊離水が無いことを確認した物をカイロ内容物モデルとして使用した。ろ紙、フィルム面を上にした包材サンプルの順に重ね、フィルム面の上に、カイロ内容物モデル１０ｇを直径約３ｃｍに丸めて置き、２４時間後にサンプルを不織布側から観察した。上記の測定を６個行い、汚れの見えたサンプル個数の比率を錆汚れサンプル率、各サンプル表面に数えられる汚れの個数の平均を錆汚れ個所数とした。
(6) カイロ表面側の親水性繊維比率
親水性繊維と疎水性繊維を見分けるために、（株）日本繊維センターの繊維鑑別用インディケーター「カヤスティンQ」を用いて鑑別方法の通りに染色した。本実施例では親水性繊維（レーヨン）を青、疎水性繊維（ポリエステル）を黄色に染色した。次に表面写真を（株）キーエンスのマイクロスコープＶＨ−８０００にて倍率１００倍で１０点撮影し、実測長さ２ｍｍの線分３０本を引き、線分を横切る繊維数と直径の積を各繊維比率として計算した。
(4) Moisture permeability JISL-1099 Using the calcium chloride method (A-1 method), the packaging material sample was set so that the film surface was the inner surface of the cup and measured. In addition, the sample by which the needle hole was processed only in a part of film part in the measurement surface converted the range of the hole part by which the needle hole was processed as a hole area. That is, when the perforated area Aa, the measured area Ac, and the measured moisture permeability Hc, the moisture permeability Ha of the perforated part is obtained by the following equation.
Ha = Hc × (Ac / Aa) (Formula 1)
The perforated area is determined by the product of the unit area where one needle hole exists and the number of needle holes present in the measurement surface, which are separated by adjacent needle holes.
(5) Rust stain model test that migrates to the surface of the nonwoven fabric As a warmer model in which moisture is continuously supplied and rust particles are contained in the moisture, Kiribai (Kirihi Chemical Co., Ltd.) “Paste Cairo” 40% by weight of water was added to the contents, and the mixture was stirred for 1 minute and confirmed to have no substantial free water as a Cairo contents model. The filter paper and the packaging material sample with the film side up were stacked in this order, and a 10 g Cairo contents model was rolled up to a diameter of about 3 cm on the film surface, and the sample was observed from the nonwoven fabric side after 24 hours. The above measurement was performed six times, and the ratio of the number of samples in which dirt was seen was defined as the rust dirt sample rate, and the average of the number of dirt counted on the surface of each sample was defined as the number of rust spots.
(6) Ratio of hydrophilic fibers on the side of the warmer surface In order to distinguish between hydrophilic fibers and hydrophobic fibers, dyeing was carried out according to the differentiation method using a fiber differentiation indicator “Kayastin Q” of Nippon Fiber Center Co., Ltd. In this example, hydrophilic fibers (rayon) were dyed blue and hydrophobic fibers (polyester) were dyed yellow. Next, 10 surface photographs were taken with a KEYENCE microscope VH-8000 at a magnification of 100, and 30 line segments with a measured length of 2 mm were drawn, and the product of the number of fibers crossing the line segment and the diameter of each line was measured. Calculated as fiber ratio.
［参考例１］
レーヨン短繊維（直径１０μｍ、５３mm長）１４％とポリエステル短繊維（直径９．１μｍ、５０mm長）８６％で形成したカードウェブを８０メッシュの金網に載せて、１５０ｒｐｍ搖動する水流絡合装置（ノズル径０．１５ｍｍ、ノズル間隔５ｍｍ×５列）で、水圧１ＭＰａで表裏１回，水圧４ＭＰａで表裏３回通し、目付３５ｇ／ｍ２のスパンレース不織布を得た。この不織布の性能を表１に示す。得られた不織布の表面にＬＤＰＥとメタロセン触媒系ポリエチレン（シール面）とを半々積層した４０μフィルムをラミネートした後、通常通り、針ロールでタテ間隔１８ｍｍの列を１２列窄孔し、カイロ用包材とした。
[ Reference Example 1]
A water web entanglement device (nozzle) on which a card web formed of 14% rayon short fibers (diameter 10 μm, 53 mm length) 14% and polyester short fibers (diameter 9.1 μm, 50 mm length) 86% is placed on an 80-mesh wire mesh and is swung at 150 rpm. A spunlace nonwoven fabric having a weight per unit area of 35 g / m 2 was obtained by passing the front and back once at a water pressure of 1 MPa and three times at the water pressure of 4 MPa. The performance of this nonwoven fabric is shown in Table 1. After laminating a 40μ film in which LDPE and metallocene catalyst-based polyethylene (seal surface) are laminated in half on the surface of the obtained non-woven fabric, 12 rows of 18 mm vertical rows are narrowed with a needle roll as usual. A material was used.
得られた包材は、吸水速度が５０秒、透湿度が１１００ｇ／ｍ２・２４ｈｒであり、錆汚れサンプル率は０％、錆汚れ個所数は０個所／サンプルと良好であった。この包材の性能を表１に示す。またこの包材のフィルム面を内側に、発熱組成物を充填し、周囲をヒートシールした使い捨てカイロを製作、使用してもカイロ表面に汚れが浮き出ることも無く、触感も滑らかで、ソフトなカイロであった。 The obtained packaging material had a water absorption rate of 50 seconds, a water vapor transmission rate of 1100 g / m 2 · 24 hr, a sample rate of rust stains of 0%, and a good number of rust stains of 0 locations / sample. The performance of this packaging material is shown in Table 1. In addition, a disposable warmer filled with a heat-generating composition with the film surface inside and heat-sealed around it is manufactured and used, so that dirt does not come out on the warmer surface, and the touch is smooth and soft. Met.
［参考例２］
レーヨン短繊維（直径１２μｍ、５３mm長）３０ｗｔ％と、ポリエステル短繊維（直径９．１μｍ、５０mm長）７０ｗｔ％で形成したカードウェブを８０メッシュの金網に載せて、１５０ｒｐｍ搖動する水流絡合装置（ノズル径０．５ｍｍ、ノズル間隔０．６ｍｍ×３列）で、水圧２ＭＰａで表裏３回通し、目付５５ｇ／ｍ２のスパンレース不織布を得た。この不織布の性能を表１に示す。得られた不織布の表面に、直径０．４ｍｍ，タテ間隔１．４ｍｍの列を１．６ｍｍの間隔で孔を開けた４０μｍのＬＤＰＥフィルムを繊維状のホットメルト接着剤で接着し、カイロ用包材とした。
[ Reference Example 2]
A water web entangling device (cardion web formed of 30 wt% rayon short fiber (diameter 12 μm, 53 mm length) and polyester short fiber (diameter 9.1 μm, 50 mm length) 70 wt% is placed on an 80-mesh wire mesh and peristated at 150 rpm. A spunlace nonwoven fabric with a basis weight of 55 g / m 2 was obtained by passing the front and back three times with a nozzle diameter of 0.5 mm and a nozzle interval of 0.6 mm × 3 rows) at a water pressure of 2 MPa. The performance of this nonwoven fabric is shown in Table 1. A 40 μm LDPE film in which holes having a diameter of 0.4 mm and a vertical spacing of 1.4 mm are perforated at a spacing of 1.6 mm is adhered to the surface of the obtained nonwoven fabric with a fibrous hot melt adhesive. A material was used.
得られた包材は、吸水速度が１．１秒，透湿度が４０００ｇ／ｍ２・２４ｈｒで、錆汚れサンプル率は１７％、錆汚れ個所数は０．２個所／サンプルと良好であった。この包材の性能を表１に示す。またこの包材のフィルム面を内側に、有孔面積が５％となるようにマスキングして発熱組成物を充填し、周囲をヒートシールした使い捨てカイロを製作、使用してもカイロ表面に汚れが浮き出ることも無く、触感も滑らかで、ソフトなカイロであった。 The obtained packaging material had a water absorption rate of 1.1 seconds, a water vapor transmission rate of 4000 g / m 2 · 24 hr, a rust stain sample rate of 17%, and a good number of rust stains of 0.2 locations / sample. . The performance of this packaging material is shown in Table 1. In addition, even if the packaging material is masked so that the perforated area is 5% and filled with a heat-generating composition, a disposable body warmer that has been heat-sealed is manufactured and used. It was a soft body warmer with no saliency and smooth touch.
［参考例３］
レーヨン短繊維を５０ｗｔ％、ポリエステル短繊維を５０ｗｔ％とし、水圧を１ＭＰａ、目付を３０ｇ／ｍ２とした以外は、参考例２と同様にして、スパンレース不織布を得た。この不織布の性能を表１に示す。得られた不織布の表面に、直径０．８ｍｍ，タテ間隔５ｍｍの列を５ｍｍの間隔で孔を開けた４０μｍのＬＤＰＥフィルムを繊維状のホットメルト接着剤で接着し、カイロ用包材とした。
[ Reference Example 3]
A spunlace nonwoven fabric was obtained in the same manner as in Reference Example 2, except that the short rayon fiber was 50 wt%, the short polyester fiber was 50 wt%, the water pressure was 1 MPa, and the basis weight was 30 g / m 2 . The performance of this nonwoven fabric is shown in Table 1. A 40 μm LDPE film having holes of 0.8 mm in diameter and 5 mm in the vertical spacing was bonded to the surface of the obtained non-woven fabric with a fibrous hot melt adhesive to obtain a packaging material for warmers.
得られた包材は、吸水速度が２秒，透湿度が２３００ｇ／ｍ２・２４ｈｒで、錆汚れサンプル率は１７％、錆汚れ個所数は０．２個所／サンプルと良好だった。この包材の性能を表１に示す。またこの包材のフィルム面を内側に、有孔面積が１３％となるようにマスキングして発熱組成物を充填し、周囲をヒートシールした使い捨てカイロを製作、使用してもカイロ表面に汚れが浮き出ることも無く、触感も滑らかで、ソフトなカイロであった。 The obtained packaging material had a water absorption rate of 2 seconds, a water vapor transmission rate of 2300 g / m 2 · 24 hr, a sample rate of rust stains of 17%, and a good number of rust stains of 0.2 locations / sample. The performance of this packaging material is shown in Table 1. Moreover, even if the film surface of this packaging material is masked so that the perforated area is 13%, it is filled with a heat generating composition, and a disposable body warmer that is heat-sealed is manufactured and used. It was a soft body warmer with no saliency and smooth touch.
［参考例４］
レーヨン短繊維を３１ｗｔ％、ポリエステル短繊維を６９ｗｔ％とし、目付２６ｇ／ｍ２とした以外は、参考例３と同様にして、スパンレース不織布を得た。この不織布の性能を表１に示す。得られた不織布の表面に、参考例２と同様のフィルムを繊維状のホットメルト接着剤で接着し、カイロ用包材とした。
[ Reference Example 4]
Rayon short fiber 31 wt%, and the polyester staple fibers and 69 wt%, except for using basis weight 26 g / m 2, in the same manner as in Reference Example 3, to obtain a spun lace nonwoven fabric. The performance of this nonwoven fabric is shown in Table 1. A film similar to Reference Example 2 was adhered to the surface of the obtained non-woven fabric with a fibrous hot melt adhesive to obtain a packaging material for warmers.
得られた包材は、吸水速度が１５秒，透湿度が４０００ｇ／ｍ２・２４ｈｒで、錆汚れサンプル率は３３％、錆汚れ個所数は０．８個所／サンプルであった。この包材の性能を表１に示す。またこの包材のフィルム面を内側に、有孔面積が５％となるようにマスキングして発熱組成物を充填し、周囲をヒートシールした使い捨てカイロを製作した。この包材から作った使い捨てカイロは使用してもカイロ表面に汚れが浮き出ることも無く、触感も滑らかで、ソフトなカイロであった。 The obtained packaging material had a water absorption rate of 15 seconds, a water vapor transmission rate of 4000 g / m 2 · 24 hr, a rust stain sample rate of 33%, and a rust stain location of 0.8 locations / sample. The performance of this packaging material is shown in Table 1. Further, a disposable body warmer was manufactured in which the film surface of this packaging material was masked so that the perforated area was 5%, filled with a heat generating composition, and the surroundings were heat sealed. The disposable body warmer made from this packaging material did not cause dirt to appear on the surface of the body, and the touch was smooth and soft.
［参考例５］
レーヨン短繊維を６０ｗｔ％、ポリエステル短繊維を４０ｗｔ％、水圧３ＭＰａで表裏１回，水圧５ＭＰａで表裏２回通し、目付を４０ｇ／ｍ２とした以外は参考例２と同様にして、スパンレース不織布を得た。この不織布の性能を表１に示す。得られた不織布の表面に、参考例３と同様のフィルムを繊維状のホットメルト接着剤で接着し、カイロ用包材とした。
[ Reference Example 5]
Spunlace nonwoven fabric in the same manner as in Reference Example 2, except that 60% by weight of rayon short fibers, 40% by weight of polyester short fibers, 1 front and back at a water pressure of 3 MPa, 2 front and back at a water pressure of 5 MPa, and a basis weight of 40 g / m 2. Got. The performance of this nonwoven fabric is shown in Table 1. A film similar to Reference Example 3 was adhered to the surface of the obtained non-woven fabric with a fibrous hot melt adhesive to obtain a packaging material for warmers.
得られた包材は、吸水速度が１．５秒，透湿度が２３００ｇ／ｍ２・２４ｈｒで、錆汚れサンプル率は３３％、錆汚れ個所数は０．８個所／サンプルであった。この包材の性能を表１に示す。またこの包材のフィルム面を内側に、有孔面積が１３％となるようにマスキングして発熱組成物を充填し、周囲をヒートシールした使い捨てカイロを製作した。この包材から作った使い捨てカイロは使用してもカイロ表面に汚れが浮き出ることも無く、触感も滑らかで、ソフトなカイロであった。 The obtained packaging material had a water absorption rate of 1.5 seconds, a moisture permeability of 2300 g / m 2 · 24 hr, a rust stain sample rate of 33%, and a rust stain location number of 0.8 locations / sample. The performance of this packaging material is shown in Table 1. Further, a disposable body warmer in which the film surface of the packaging material was masked so that the perforated area was 13%, was filled with a heat generating composition, and the periphery was heat-sealed was produced. The disposable body warmer made from this packaging material did not cause dirt to appear on the surface of the body, and the touch was smooth and soft.
［実施例１］
８０メッシュの金網に、ポリエステルスパンボンド（直径１４μｍ １５ｇ／ｍ２）、レーヨン短繊維（直径１０μｍ、７mm長 １２ｇ／ｍ２）５０％とポリエステル短繊維（直径９．１μｍ、１０mm長）５０％で形成した抄造ウェブの順に載せて、１５０ｒｐｍ搖動する水流絡合装置（ノズル径０．１５ｍｍ、ノズル間隔５ｍｍ×５列）で、水圧３ＭＰａで表裏２回，水圧５ＭＰａで表裏２回通し、目付４０ｇ／ｍ２のスパンレース不織布を得た。この不織布の親水性繊維の混用率は３０％、疎水性繊維の混用率は７０％であった。この不織布の性能を表１に示す。得られた不織布の、スパンボンド側に参考例３と同様のフィルムを繊維状のホットメルト接着剤で接着し、カイロ用包材とした。得られた包材のカイロ表面側の親水性繊維比率は５６％と、不織布の親水性繊維の混用率３０％より高かった。この包材は、吸水速度が１２秒，透湿度が２３００ｇ／ｍ２・２４ｈｒで、錆汚れサンプル率は０％、錆汚れ個所数は０個所／サンプルと良好であった。この包材の性能を表１に示す。またこの包材のフィルム面を内側に、有孔面積が１３％となるようにマスキングして発熱組成物を充填し、周囲をヒートシールした使い捨てカイロを製作した。この包材から作った使い捨てカイロは使用してもカイロ表面に汚れが浮き出ることも無く、触感も滑らかで、ソフトなカイロであった。
[Example 1 ]
80 mesh mesh with polyester spunbond (diameter 14 μm 15 g / m 2 ), rayon staple fiber (diameter 10 μm, 7 mm length 12 g / m 2 ) 50% and polyester staple fiber (diameter 9.1 μm, 10 mm length) 50% It is placed in the order of the formed paper webs, and is passed through the water flow entanglement device (nozzle diameter 0.15 mm, nozzle interval 5 mm × 5 rows) at 150 rpm, passing the front and back twice at a water pressure of 3 MPa, and the front and back twice at a water pressure of 5 MPa. A spun lace nonwoven fabric of m 2 was obtained. The mixed ratio of hydrophilic fibers in this nonwoven fabric was 30%, and the mixed ratio of hydrophobic fibers was 70%. The performance of this nonwoven fabric is shown in Table 1. A film similar to Reference Example 3 was adhered to the spunbond side of the obtained non-woven fabric with a fibrous hot melt adhesive to obtain a packaging material for warmers. The hydrophilic fiber ratio of the obtained packaging material on the side of the warmer surface was 56%, which was higher than the mixed ratio of the hydrophilic fibers of the nonwoven fabric 30%. The packaging material had a water absorption rate of 12 seconds, a water vapor transmission rate of 2300 g / m 2 · 24 hr, a rust stain sample rate of 0%, and a good number of rust stain points of 0 places / sample. The performance of this packaging material is shown in Table 1. Further, a disposable body warmer in which the film surface of the packaging material was masked so that the perforated area was 13%, was filled with a heat generating composition, and the periphery was heat-sealed was produced. The disposable body warmer made from this packaging material did not cause dirt to appear on the surface of the body, and the touch was smooth and soft.
［比較例１］
レーヨン短繊維を７１％、ポリエステル短繊維を２９ｗｔ％とし、目付３５ｇ／ｍ２とした以外は、参考例３と同様にして、スパンレース不織布を得た。この不織布の性能を表１に示す。得られた不織布に参考例３と同様のフィルムを繊維状のホットメルト接着剤で接着し、カイロ用包材とした。この包材の性能を表１に示す。
[Comparative Example 1]
A spunlace nonwoven fabric was obtained in the same manner as in Reference Example 3 except that the rayon staple fiber was 71%, the polyester staple fiber was 29 wt%, and the basis weight was 35 g / m 2 . The performance of this nonwoven fabric is shown in Table 1. A film similar to Reference Example 3 was bonded to the obtained nonwoven fabric with a fibrous hot melt adhesive to obtain a packaging material for warmers. The performance of this packaging material is shown in Table 1.
得られた包材は、透湿度は２３００ｇ／ｍ２・２４ｈｒであったが、吸水速度が０．３秒と速かった。錆汚れサンプル率は１００％であり、錆汚れ個所数は５個所／サンプルと汚れ易かった。またこの包材のフィルム面を内側に、有孔面積が５％となるようにマスキングして発熱組成物を充填し、周囲をヒートシールした使い捨てカイロを製作した。この包材から作った使い捨てカイロは使用するとカイロ表面に発熱体より発生したサビによる汚れが浮き出て、見栄えが悪くなってしまった。 Although the obtained packaging material had a water vapor transmission rate of 2300 g / m 2 · 24 hr, the water absorption rate was as fast as 0.3 seconds. The sample rate of rust stains was 100%, and the number of rust stains was easily 5 / sample. Further, a disposable body warmer was manufactured in which the film surface of this packaging material was masked so that the perforated area was 5%, filled with a heat generating composition, and the surroundings were heat sealed. When the disposable body warmer made from this packaging material was used, dirt due to rust generated from the heating element appeared on the surface of the body, and it looked bad.
［比較例２］
レーヨン短繊維を６１％、ポリエステル短繊維を３９％とし、目付２８ｇ／ｍ２とした以外は参考例３と同様にして、スパンレース不織布を得た。この不織布の性能を表１に示す。得られた不織布の表面に、直径０．４ｍｍ，タテ間隔１．４ｍｍの列を１．２ｍｍの間隔で孔を開けた４０μｍのＬＤＰＥフィルムを繊維状のホットメルト接着剤で接着し、カイロ用包材とした。この包材の性能を表１に示す。またこの包材のフィルム面を内側に、発熱組成物を充填し、周囲をヒートシールした使い捨てカイロを製作した。得られた包材は、吸水速度が１．６秒であったが，透湿度が６０００ｇ／ｍ２・２４ｈｒと高かった。錆汚れサンプル率は１００％、錆汚れ個所数は５個所／サンプルと汚れ易かった。またこの包材のフィルム面を内側に、有孔面積が５％となるようにマスキングして発熱組成物を充填し、周囲をヒートシールした使い捨てカイロを製作した。この包材から作った使い捨てカイロは使用するとカイロ表面に発熱体より発生したサビによる汚れが浮き出て、見栄えが悪くなってしまった。
[Comparative Example 2]
A spunlace nonwoven fabric was obtained in the same manner as in Reference Example 3 except that the rayon short fibers were 61%, the polyester short fibers were 39%, and the basis weight was 28 g / m 2 . The performance of this nonwoven fabric is shown in Table 1. A 40 μm LDPE film in which holes with a diameter of 0.4 mm and a vertical spacing of 1.4 mm are perforated with a spacing of 1.2 mm is adhered to the surface of the obtained nonwoven fabric with a fibrous hot melt adhesive, and then wrapped in a warmer A material was used. The performance of this packaging material is shown in Table 1. Further, a disposable body warmer was prepared in which the film surface of the packaging material was placed inside, the exothermic composition was filled, and the surroundings were heat-sealed. The obtained packaging material had a water absorption rate of 1.6 seconds, but had a high moisture permeability of 6000 g / m 2 · 24 hr. The rust stain sample rate was 100%, and the number of rust stains was 5 / sample. Further, a disposable body warmer was manufactured in which the film surface of this packaging material was masked so that the perforated area was 5%, filled with a heat generating composition, and the surroundings were heat sealed. When the disposable body warmer made from this packaging material was used, dirt due to rust generated from the heating element appeared on the surface of the body, and it looked bad.
本発明のカイロは、肌触り、柔軟性に優れ、嵩高でソフトな感触を持ち、且つ使用時にカイロ表面に発熱組成物に由来する錆汚れが付かないので、使い捨てカイロとして有用である。 The warmer of the present invention is useful as a disposable warmer because it has excellent touch and flexibility, has a bulky and soft feel, and does not have rust stains derived from the heat-generating composition on the warmer surface during use.
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| JP2001120588A (en) * | 1999-10-27 | 2001-05-08 | Sanpo Kagaku Kk | Thermal adhesive plaster |
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| JP2004073688A (en) * | 2002-08-21 | 2004-03-11 | Kao Corp | Vapor generation thermal sheet for eye |
| JP2005160659A (en) * | 2003-12-02 | 2005-06-23 | Ooshin Mlp:Kk | Heat generating structure to be directly on applied skin |
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| WO2006006657A1 (en) * | 2004-07-14 | 2006-01-19 | Mycoal Products Corporation | Thermal wrap around joint |
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| JP2000102557A (en) * | 1998-09-29 | 2000-04-11 | Dokai Chemical Industries Co Ltd | Cold accumulating tool |
| JP2001120588A (en) * | 1999-10-27 | 2001-05-08 | Sanpo Kagaku Kk | Thermal adhesive plaster |
| JP2003129041A (en) * | 2001-10-25 | 2003-05-08 | Maikooru Kk | Exothermic composition, exothermic element using the same and method for producing the exothermic element |
| JP2004073688A (en) * | 2002-08-21 | 2004-03-11 | Kao Corp | Vapor generation thermal sheet for eye |
| JP2005160659A (en) * | 2003-12-02 | 2005-06-23 | Ooshin Mlp:Kk | Heat generating structure to be directly on applied skin |
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