JPH1199601A - Moisture permeable composite film and its production - Google Patents

Moisture permeable composite film and its production

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Publication number
JPH1199601A
JPH1199601A JP9261182A JP26118297A JPH1199601A JP H1199601 A JPH1199601 A JP H1199601A JP 9261182 A JP9261182 A JP 9261182A JP 26118297 A JP26118297 A JP 26118297A JP H1199601 A JPH1199601 A JP H1199601A
Authority
JP
Japan
Prior art keywords
moisture
film
permeable
polyolefin
laminated
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
JP9261182A
Other languages
Japanese (ja)
Other versions
JP3838758B2 (en
Inventor
Masaru Sasai
優 笹井
Original Assignee
Tokuyama Corp
株式会社トクヤマ
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Tokuyama Corp, 株式会社トクヤマ filed Critical Tokuyama Corp
Priority to JP26118297A priority Critical patent/JP3838758B2/en
Publication of JPH1199601A publication Critical patent/JPH1199601A/en
Application granted granted Critical
Publication of JP3838758B2 publication Critical patent/JP3838758B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/70General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
    • B29C66/71General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined

Abstract

PROBLEM TO BE SOLVED: To provide a moisture permeable composite film having good air permeability or moisture permeability and obtained by laminating a polyolefinic moisture permeable film and a nonwoven fabric without generating wrinkles on the polyolefinic moisture permeable film. SOLUTION: In a moisture permeable composite film wherein a nonwoven fabric is laminated on at least one surface of a polyolefinic moisture permeable film, a hot-melt adhesive is applied between the polyolefinic moisture permeable film and the nonwoven fabric in a fine fibrous state at a ratio of 0.1-3 g/m<2> in a scattered form by a nozzle jet method or a die coating method and the polyolefinic moisture permeable film and the nonwoven fabric are laminated through the adhesive so that at least one adhesive point is present per the 2×2 mm section of a laminated surface.

Description

【発明の詳細な説明】 DETAILED DESCRIPTION OF THE INVENTION

【0001】 [0001]

【発明の属する技術分野】本発明は、不織布とポリオレフィン系透湿性フィルムとからなる複合フィルム及びその製造方法に関し、さらに、詳しくは紙オムツや生理用ナプキンのバックシートとして好適な透湿性複合フィルム及びその製造方法に関するものである。 BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a composite film comprising a nonwoven fabric and a polyolefin-based moisture-permeable film and a method for producing the same. More specifically, the present invention relates to a moisture-permeable composite film suitable as a backsheet for paper diapers and sanitary napkins. The present invention relates to the manufacturing method.

【0002】 [0002]

【従来の技術】充填剤含有のポリオレフィンフィルムを
延伸等して得られるポリオレフィン系透湿性フィルム
は、その透湿、防水機能から紙オムツや作業衣等へ広く
利用されている。そして、最近では、肌触りがよく、よ
り布地に近い風合いとするため、不織布と積層して透湿
性複合フィルムとし、紙オムツのバックシートとして使
用することが行われている。
2. Description of the Related Art Polyolefin-based moisture-permeable films obtained by stretching a filler-containing polyolefin film are widely used in paper diapers, work clothes and the like because of their moisture-permeable and waterproof functions. In recent years, in order to obtain a feel that is good to the touch and more close to that of a fabric, it has been practiced to laminate it with a nonwoven fabric to form a moisture-permeable composite film and use it as a back sheet for a paper diaper.

【0003】ここで、上記ポリオレフィン系透湿性フィ
ルムと不織布との積層は、積層面にホットメルト系接着
剤からなる接着点を散在させて両者を接着することによ
り実施するのが一般的である。その際、ホットメルト系
接着剤の、ポリオレフィン系透湿性フィルムや不織布へ
の塗布は、かかる接着剤をグラビア印刷方式によりドッ
トパターン塗布するか、ノズル吐出方式により繊維状物
としてスプレー塗布するのが主流である。
Here, the lamination of the above-mentioned polyolefin-based moisture-permeable film and the nonwoven fabric is generally carried out by dispersing adhesion points made of a hot-melt adhesive on the lamination surface and adhering them. At that time, hot melt adhesives are mainly applied to polyolefin-based moisture-permeable films or non-woven fabrics by applying the adhesive in a dot pattern by a gravure printing method or by spraying as a fibrous material by a nozzle discharge method. It is.

【0004】 [0004]

【発明が解決しようとする課題】ところで、上記ポリオレフィン系透湿性フィルムと不織布との積層において、
ホットメルト系接着剤の塗布面積をあまり大きくしすぎると、フィルムの通気性や透湿性が低下する問題が発生する。 If the coating area of ​​the hot melt adhesive is made too large, there is a problem that the air permeability and moisture permeability of the film are lowered. こうしたことから、上記ドットパターン塗布によりホットメルト系接着剤を塗布したものの場合、ホットメルト系接着剤のドット間隔は3〜7mmあり、積層面の9〜50mm 2正方区画当たりに接着点が1つ形成されているのが一般的である。 Therefore, when the hot melt adhesive is applied by applying the dot pattern, the dot spacing of the hot melt adhesive is 3 to 7 mm, and there is one adhesive point per 9 to 50 mm 2 square section of the laminated surface. It is generally formed. 他方、スプレー塗布により塗布されたもの場合、吹き付けられるホットメルト系接着剤の繊維状物(平均繊維径30〜50μm)からなる接着点は積層面の7〜25mm 2正方区画当たりに1つ形成されているのが一般的である。 On the other hand, when applied by spray coating, one adhesive point consisting of a fibrous material (average fiber diameter 30 to 50 μm) of the hot melt adhesive to be sprayed is formed per 7 to 25 mm 2 square section of the laminated surface. It is common to have. By the way, in laminating the polyolefin-based moisture-permeable film and the nonwoven fabric, By the way, in laminating the anisotropic-based moisture-permeable film and the polyolefin fabric,
If the application area of the hot-melt adhesive is too large, there is a problem that the air permeability and moisture permeability of the film decrease. For these reasons, in the case where the hot melt adhesive is applied by the dot pattern application, the dot interval of the hot melt adhesive is 3 to 7 mm, and 9 to 50 mm 2 on the lamination surface. One adhesion point per square section. It is generally formed. On the other hand, when applied by spray coating, one bonding point consisting of a fibrous material (average fiber diameter of 30 to 50 μm) of the hot-melt adhesive to be sprayed is formed per square section of 7 to 25 mm 2 on the laminated surface. That is common. If the application area of ​​the hot-melt adhesive is too large, there is a problem that the air permeability and moisture permeability of the film decrease. For these reasons, in the case where the hot melt adhesive is applied by the dot pattern application, The dot interval of the hot melt adhesive is 3 to 7 mm, and 9 to 50 mm 2 on the annealing surface. One adhesion point per square section. It is generally formed. On the other hand, when applied by spray coating, one bonding point consisting of a fibrous material (average fiber diameter of 30 to 50 μm) of the hot-melt adhesive to be sprayed is formed per square section of 7 to 25 mm 2 on the laminated surface. That is common.

【0005】しかして、上記のような接着の場合、接着
点間の間隔があきすぎて、透湿性フィルムが不織布から
広い範囲で浮き上がってしまい、この部分にしわが発生
し易くなる。そのため、外観が悪化し、このものの商品
価値を低下させていた。
[0005] However, in the case of the above-mentioned bonding, the interval between the bonding points is too large, and the moisture-permeable film rises over a wide range from the nonwoven fabric, and wrinkles are liable to occur in this portion. For this reason, the appearance has deteriorated, and the commercial value of the product has been reduced.

【0006】こうした背景にあって本発明は、良好な通気性や透湿性を有し、且つポリオレフィン系透湿性フィルムにしわの発生がないポリオレフィン系透湿性フィルムと不織布とが積層された透湿性複合フィルムを開発することを目的とする。 [0006] Against this background, the present invention provides a moisture-permeable composite in which a polyolefin-based moisture-permeable film and a nonwoven fabric are laminated, each having good air-permeability and moisture-permeability, and having no wrinkles in the polyolefin-based moisture-permeable film. The purpose is to develop films.

【0007】 [0007]

【課題を解決するための手段】そこで、本発明者は、上
記の課題に鑑み、鋭意研究を続けてきた。その結果、透
湿性複合フィルムにおいて、ホットメルト系接着剤を介
してポリオレフィン系透湿性フィルムと不織布とを、積
層面2×2mm区画当たりに少なくとも一つの接着点が
存在するように積層することにより、上記の課題が解決
できることを見出し、本発明を完成させるに至った。
In view of the above problems, the present inventor has continued intensive studies. As a result, in the moisture-permeable composite film, the polyolefin-based moisture-permeable film and the nonwoven fabric are laminated via the hot-melt adhesive such that at least one adhesion point exists per lamination surface 2 × 2 mm section. The inventors have found that the above problems can be solved, and have completed the present invention.

【0008】すなわち、本発明は、ポリオレフィン系透
湿性フィルムの少なくとも片面に不織布が積層されてな
る透湿性複合フィルムであって、該ポリオレフィン系透
湿性フィルムと不織布との間にホットメルト系接着剤が
0.1〜3g/m2の割合で散在しており、該接着剤を
介してポリオレフィン系透湿性フィルムと不織布とは、
積層面2×2mm区画当たりに少なくとも一つの接着点が存在していることを特徴とする透湿性複合フィルムである。 The moisture-permeable composite film is characterized in that at least one adhesive point is present per 2 × 2 mm section of the laminated surface. That is, the present invention is a moisture-permeable composite film comprising a nonwoven fabric laminated on at least one surface of a polyolefin-based moisture-permeable film, wherein a hot-melt adhesive is interposed between the polyolefin-based moisture-permeable film and the nonwoven fabric. 0.1 to 3 g / m 2 are scattered, and the polyolefin-based moisture-permeable film and the nonwoven fabric are separated through the adhesive. That is, the present invention is a moisture-permeable composite film comprising a polyolefin fabric laminated on at least one surface of a recently-based moisture-permeable film, wherein a hot-melt adhesive is involved between the similarly-based moisture-permeable film. 0.1 to 3 g / m 2 are scattered, and the subsequently-based moisture-permeable film and the polyolefin fabric are separated through the adhesive.
A moisture-permeable composite film having at least one adhesion point per 2 × 2 mm section of the lamination surface. A moisture-permeable composite film having at least one adhesion point per 2 × 2 mm section of the lamination surface.

【0009】本発明において、ポリオレフィン系透湿性
フィルムの素材となるポリオレフィンは、エチレン、プ
ロピレン、1−ブテン等の好適には炭素数2〜20のα
−オレフィンの単独共重合体またはこれらの共重合体が
何ら制限なく使用される。なかでも、柔軟性、強度、価
格から中密度ポリエチレン、低密度ポリエチレン、線状
低密度ポリエチレン等が好適である。
In the present invention, the polyolefin used as the material of the polyolefin-based moisture-permeable film is preferably a C 2-20 α such as ethylene, propylene or 1-butene.
Homopolymers of olefins or copolymers thereof are used without any restrictions. Among them, medium-density polyethylene, low-density polyethylene, linear low-density polyethylene, and the like are preferable from the viewpoint of flexibility, strength, and price. Homopolymers of olefins or copolymers thereof are used without any restrictions. Among them, medium-density polyethylene, low-density polyethylene, linear low-density polyethylene, and the like are preferred from the viewpoint of flexibility, strength, and price.

【0010】本発明においてポリオレフィン系透湿性フィルム(以下透湿性フィルムとも略する)は、上記ポリオレフィンからなり、フィルムの片側からもう一方の面に連通する連通孔を有する公知のものが何ら制限なく使用できる。その際、この透湿性フィルムは、空隙率が1
0〜70%の範囲のものが好ましい。 Those in the range of 0 to 70% are preferable. 空隙率が10%以下であれば充填材の周囲にできた空隙同士が連結されず、フィルムの両面を連結する連通孔が形成され難くなり、透湿性フィルムの特性である通気性や透湿性が十分でなくなる傾向がある。 If the porosity is 10% or less, the voids formed around the filler are not connected to each other, and it becomes difficult to form communication holes for connecting both sides of the film, and the breathability and moisture permeability, which are the characteristics of the moisture-permeable film, are deteriorated. Tends to be less than enough. 一方、空隙率が70%を越える場合は、フィルムの機械的強度が不足し、加工工程においてフィルム破断や使用中の破れ等の問題を生じ易くなる。 On the other hand, when the porosity exceeds 70%, the mechanical strength of the film is insufficient, and problems such as film breakage and tearing during use are likely to occur in the processing process. 特に透湿性フィルムの機械的物性を満足させるためには、空隙率は25〜65%であることが好ましい。 In particular, in order to satisfy the mechanical properties of the moisture-permeable film, the porosity is preferably 25 to 65%. In the present invention, a polyolefin-based moisture-permeable film (hereinafter abbreviated as a moisture-permeable film) made of the above-mentioned polyolefin and having a communicating hole communicating from one side of the film to the other surface can be used without any limitation. it can. At this time, the moisture permeable film has a porosity of 1 In the present invention, a observed-based moisture-permeable film (hereinafter abbreviated as a moisture-permeable film) made of the above-mentioned otherwise and having a communicating hole communicating from one side of the film to the other surface can be used without any limitation. It can. At this time, the moisture permeable film has a porosity of 1
Those having a range of 0 to 70% are preferred. When the porosity is 10% or less, the voids formed around the filler are not connected to each other, and it is difficult to form a communication hole connecting both surfaces of the film, and the air permeability and moisture permeability, which are characteristics of the moisture permeable film, are reduced. Tends to be insufficient. On the other hand, if the porosity exceeds 70%, the mechanical strength of the film becomes insufficient, and problems such as breakage of the film and tear during use are likely to occur in the processing step. In particular, in order to satisfy the mechanical properties of the moisture-permeable film, the porosity is preferably 25 to 65%. Those having a range of 0 to 70% are preferred. When the porosity is 10% or less, the voids formed around the filler are not connected to each other, and it is difficult to form a communication hole connecting both surfaces of the film, And the air permeability and moisture permeability, which are characteristics of the moisture permeable film, are reduced. Tends to be insufficient. On the other hand, if the porosity exceeds 70%, the mechanical strength of the film becomes insufficient, and problems such as breakage of the film and tear during use are likely to occur in the processing step. In particular, in order to satisfy the mechanical properties of the moisture-permeable film, the porosity is preferably 25 to 65%.

【0011】また、透湿性フィルムは、防水性の観点から、エタノールバブルポイント法にて測定した最大細孔径が0.01〜10μmのものが好ましい。特に、0.
1〜5μmのものが好適である。
The moisture permeable film preferably has a maximum pore diameter of 0.01 to 10 μm as measured by the ethanol bubble point method from the viewpoint of waterproofness. In particular, 0.
Those having a thickness of 1 to 5 μm are preferred.

【0012】本発明において、透湿性フイルムの透湿度は、得られる透湿性複合フィルムの透湿度を良好に保持する観点から、通常3500g/m 2以上、好適には4
000〜15000g/m 2であるのが一般的である。

一般に、透湿性フィルムは、無機充填剤の量が多いほど、延伸倍率が高いほど、透湿度が高くなるが、同時に透湿性フィルムの製造時の破断やトラブルがつきものになり、製造コストも高くなる。 In general, the larger the amount of the inorganic filler and the higher the draw ratio, the higher the moisture permeability of the moisture-permeable film, but at the same time, breakage and troubles occur during the production of the moisture-permeable film, and the production cost also increases. .. そのため、不織布を積層する際の透湿度の低下はできる限り少なくし、上記透湿度の透湿性フィルムを用いて、好適には3000g/m Therefore, the decrease in moisture permeability when laminating the non-woven fabric is minimized, and the moisture-permeable film having the above-mentioned moisture permeability is preferably used at 3000 g / m.
2以上の良好な透湿度を有する透湿性複合フィルムを得るのが好ましい。 It is preferable to obtain a moisture-permeable composite film having two or more good moisture permeabilitys. なお、本発明において、透湿度はJI In the present invention, the moisture permeability is JI.
S Z 0208のB法に示される方法で測定した値である。 It is a value measured by the method shown in the B method of S Z 0208. In the present invention, the moisture permeability of the moisture-permeable film is usually at least 3500 g / m 2 , preferably 4 g / m 2 , from the viewpoint of maintaining good moisture permeability of the resulting moisture-permeable composite film. In the present invention, the moisture permeability of the moisture-permeable film is usually at least 3500 g / m 2 , preferably 4 g / m 2 , from the viewpoint of maintaining good moisture permeability of the resulting moisture-permeable composite film.
It is generally from 000 to 15000 g / m 2 . It is generally from 000 to 15000 g / m 2 .
In general, the moisture-permeable film, as the amount of the inorganic filler is larger, the stretching ratio is higher, the moisture permeability is higher, but at the same time, the breakage and trouble during the production of the moisture-permeable film are accompanied, and the production cost is also increased. . Therefore, the reduction in moisture permeability when laminating the nonwoven fabric is minimized as much as possible. In general, the moisture-permeable film, as the amount of the inorganic filler is larger, the stretching ratio is higher, the moisture permeability is higher, but at the same time, the breakage and trouble during the production of the moisture-permeable film are accompanied, and the production cost is also increased. Therefore, the reduction in moisture permeability when laminating the comprising fabric is minimized as much as possible.
It is preferable to obtain a moisture-permeable composite film having two or more good moisture permeability. In the present invention, the moisture permeability is determined by JI It is preferred to obtain a moisture-permeable composite film having two or more good moisture permeability. In the present invention, the moisture permeability is determined by JI
This is a value measured by the method shown in Method B of SZ0208. This is a value measured by the method shown in Method B of SZ0208.

【0013】また、透湿性フィルムの通気度は、通常、
10〜10,000秒/100ccの範囲であることが好適である。本発明において通気度はJIS P 81
17に準拠して測定した値である。
The air permeability of the moisture-permeable film is usually
Preferably, it is in the range of 10 to 10,000 seconds / 100 cc. In the present invention, the air permeability is JIS P81.
This is a value measured according to No.17.

【0014】さらに、上記透湿性フィルムは、15〜1
00μm、好ましくは15〜40μmのものが好適であ
る。また、透湿性フィルムは、目付が15〜40g/m
2のものが特に好ましい。15g/m2以下の場合、製造
工程においてピンホールやフィルムの破断が多発し、安
定的に生産することができない。また、40g/m 2
越えるとバックシートとして使用するには堅くなる傾向
があり、また過剰品質となる傾向が生じる。
Further, the above-mentioned moisture-permeable film has a thickness of 15 to 1
00 μm, preferably 15 to 40 μm is suitable.
You. The moisture permeable film has a basis weight of 15 to 40 g / m.
TwoAre particularly preferred. 15g / mTwoManufacture if
Pinholes and film breakage occur frequently during the process, Pinholes and film breakage occur frequently during the process,
It cannot be produced regularly. In addition, 40 g / m It cannot be produced regularly. In addition, 40 g / m Two To Two To
Beyond that, it tends to be hard to use as a backsheet Beyond that, it tends to be hard to use as a backsheet
And tend to be of excessive quality. And tend to be of excessive quality.

【0015】本発明において、上記透湿性フィルムは、
如何なる方法により製造したものでも良いが、一般には、前記ポリオレフィンに充填剤を充填したポリオレフィン組成物をシート状に溶融成形し、これを少なくとも1軸以上延伸して多孔化させたものが好ましい。充填剤としては、炭酸カルシウム、硫酸バリウム、石膏、亜硫酸カルシウム、リン酸カルシウム、炭酸マグネシウム、

硫酸マグネシウム、水和珪酸、無機珪酸、ソーダ灰、塩化ナトリウム、クレー、各種セメント、火山灰、シラス、酸化チタン、酸化鉄、カーボンブラック、金属粉、 Magnesium sulfate, hydrated silicic acid, inorganic silicic acid, soda ash, sodium chloride, clay, various cements, volcanic ash, silas, titanium oxide, iron oxide, carbon black, metal powder,
その他の無機物または無機物を主体とする有機金属塩が挙げられ、これらは単独または混合物で使用される。 Other inorganic substances or organometallic salts mainly composed of inorganic substances are mentioned, and these are used alone or in a mixture. 一般に、平均粒径が50μm以下、好ましくは0.05〜 Generally, the average particle size is 50 μm or less, preferably 0.05 to.
30μm以下の範囲、特に、0.1〜5μm以下のものが好ましい。 The range of 30 μm or less, particularly preferably 0.1 to 5 μm or less. そのポリオレフィンへの配合量は、通常、 The amount to be blended with the polyolefin is usually
ポリオレフィン100重量部に対して50〜400重量部、好ましくは60〜300重量部の割合で使用される。 It is used in a proportion of 50 to 400 parts by weight, preferably 60 to 300 parts by weight, based on 100 parts by weight of polyolefin. In the present invention, the above-mentioned moisture-permeable film comprises: In the present invention, the above-mentioned moisture-permeable film:
Although it may be manufactured by any method, it is generally preferable that the polyolefin composition in which the polyolefin is filled with a filler is melt-molded into a sheet, and this is stretched at least uniaxially to make it porous. Fillers include calcium carbonate, barium sulfate, gypsum, calcium sulfite, calcium phosphate, magnesium carbonate, Although it may be manufactured by any method, it is generally preferred that the polyolefin composition in which the polyolefin is filled with a filler is melt-molded into a sheet, and this is stretched at least uniaxially to make it porous. Fillers include calcium carbonate , barium sulfate, gypsum, calcium sulfite, calcium phosphate, polyolefin carbonate,
Magnesium sulfate, hydrated silicic acid, inorganic silicic acid, soda ash, sodium chloride, clay, various cements, volcanic ash, shirasu, titanium oxide, iron oxide, carbon black, metal powder, Magnesium sulfate, hydrated silicic acid, inorganic silicic acid, soda ash, sodium chloride, clay, various cements, volcanic ash, shirasu, titanium oxide, iron oxide, carbon black, metal powder,
Other inorganic substances or organic metal salts mainly composed of inorganic substances may be mentioned, and these may be used alone or in a mixture. Generally, the average particle size is 50 μm or less, preferably 0.05 to Other inorganic substances or organic metal salts mainly composed of inorganic substances may be mentioned, and these may be used alone or in a mixture. Generally, the average particle size is 50 μm or less, preferably 0.05 to
It is preferably in the range of 30 μm or less, particularly preferably 0.1 to 5 μm. The compounding amount to the polyolefin is usually It is preferably in the range of 30 μm or less, particularly preferably 0.1 to 5 μm. The compounding amount to the polyolefin is usually
It is used in a proportion of 50 to 400 parts by weight, preferably 60 to 300 parts by weight, based on 100 parts by weight of polyolefin. It is used in a proportion of 50 to 400 parts by weight, preferably 60 to 300 parts by weight, based on 100 parts by weight of polyolefin.

【0016】ポリオレフィンと無機充填材とからなるポ
リオレフィン組成物のシート状への溶融成形は、特に限
定されないが、T−ダイ成形法、空冷式または水冷式イ
ンフレーション成形法によって未延伸フィルムを形成さ
せるのが好適である。次に、この未延伸フィルムを、一
般にロール延伸法による1軸延伸または1軸延伸後、テ
ンター延伸機、エアーインフレーション延伸機、マンド
レル延伸機等により横方向に逐次に2軸延伸するか、あ
るいは同時に縦及び横方向に延伸する方法により延伸す
る。延伸温度は、一般に常温以上でポリオレフィンの融
点以下、特に融点より10℃低い温度が好ましい。ま
た、延伸倍率は少なくとも1軸方向に1.2〜2.5
倍、即ち、2軸延伸の場合は縦(MD)、横(TD)方向にそれぞれ1.2〜2.5倍とすることが、力学バランスや、強度の保持と同時に優れた通気性及び防水性(耐水性)を示すために特に好ましい。 In the case of biaxial stretching, multiplying it by 1.2 to 2.5 times in the vertical (MD) and horizontal (TD) directions, respectively, keeps the mechanical balance and strength, and at the same time, has excellent breathability and waterproofness. It is particularly preferable because it exhibits properties (water resistance). さらに、かかる延伸後、緊張下で熱処理を行うことや、コロナ放電等の処理を行うことができる。 Further, after such stretching, heat treatment can be performed under tension, and treatment such as corona discharge can be performed. The melt molding of the polyolefin composition comprising the polyolefin and the inorganic filler into a sheet is not particularly limited, but the unstretched film is formed by a T-die molding method, an air-cooled or water-cooled inflation molding method. Is preferred. Next, this unstretched film is generally biaxially stretched in the transverse direction by a tenter stretching machine, an air inflation stretching machine, a mandrel stretching machine, or the like, or generally simultaneously, after uniaxial stretching or uniaxial stretching by a roll stretching method. Stretching is performed by a method of stretching in the longitudinal and transverse directions. The stretching temperature is generally from room temperature to the melting point of the polyolefin, preferably 10 ° C. below the melting point. The stretching ratio is at least 1.2 to 2.5 in one uniaxial direction. The melt molding of the polyolefin composition comprising the polyolefin and the inorganic filler into a sheet is not particularly limited, but the unstretched film is formed by a T-die molding method, an air-cooled or water-cooled inflation molding method. Is preferred Next, this unstretched film is generally biaxially stretched in the transverse direction by a tenter stretching machine, an air inflation stretching machine, a mandrel stretching machine, or the like, or generally simultaneously, after uniaxial stretching or uniaxial stretching by a roll stretching method The stretching temperature is generally from room temperature to the melting point of the polyolefin, preferably 10 ° C. below the melting point. The stretching ratio is at least 1.2 to. Stretching is performed by a method of stretching in the longitudinal and transverse directions. 2.5 in one uniaxial direction.
In the case of biaxial stretching, it should be 1.2 to 2.5 times in the longitudinal (MD) and transverse (TD) directions, respectively. It is particularly preferable to show the property (water resistance). Further, after the stretching, a heat treatment under tension or a treatment such as corona discharge can be performed. In the case of biaxial stretching, it should be 1.2 to 2.5 times in the longitudinal (MD) and transverse (TD) directions, respectively. It is particularly preferred to show the property (water resistance). Further, after the stretching, a heat treatment under tension or a treatment such as corona discharge can be performed.

【0017】次に、本発明において、不織布は、ポリオ
レフィン、ポリエステル、レイヨン、ナイロン等の公知
の不織布の素材となる如何なる樹脂により製造されたも
のでも好適に使用できる。また、この不織布は単一の樹
脂からなる必要性はなく、融点の異なる2、3成分の複
合繊維でもかまわない。なかでも、強度、価格、風合い
からポリプロピレン単体や、ポリプロピレンが芯、ポリ
エチレンが鞘である芯鞘構造のものが好ましい。
Next, in the present invention, as the nonwoven fabric, any resin produced from any known nonwoven material such as polyolefin, polyester, rayon, and nylon can be suitably used. The non-woven fabric does not need to be made of a single resin, and may be a composite fiber of two or three components having different melting points. Above all, from the standpoint of strength, price and texture, it is preferable to use polypropylene alone, or a core-sheath structure in which polypropylene is the core and polyethylene is the sheath.

【0018】本発明において用いられる不織布の目付は
5〜30g/m2が好適である。目付が5g/m2よりも
少ないと、肌触りが悪くなる傾向が生じる。一方、目付
が30g/m2よりも大きくなると、過剰品質となる傾
向が生じる。
The weight of the nonwoven fabric used in the present invention is preferably 5 to 30 g / m 2 . If the basis weight is less than 5 g / m 2 , the touch tends to be poor. On the other hand, if the basis weight is larger than 30 g / m 2 , the quality tends to be excessive.

【0019】また、不織布の繊度は0.5〜10デニー
ルが好適である。0.5デニール以下になると、しっと
りした手触り感となり、布地風の風合いとは言い難くな
る。一方、10デニールを越えると、繊維の剛性が大き
くなり、風合いの低下につながる。SEM(JSM−T
220)で観察した平均繊維径で表すと9〜40μm程度である。 The average fiber diameter observed in 220) is about 9 to 40 μm. 一般に、繊維長は強度の面から30mm以上連続した長繊維が好ましいが、メルトブローに関しては短繊維でもかまわない。 In general, the fiber length is preferably a continuous long fiber of 30 mm or more from the viewpoint of strength, but a short fiber may be used for melt blow. The fineness of the nonwoven fabric is preferably 0.5 to 10 denier. When the density is 0.5 denier or less, a moist feel is obtained, and it is difficult to say a fabric-like texture. On the other hand, when it exceeds 10 denier, the rigidity of the fiber becomes large, which leads to a reduction in texture. SEM (JSM-T The fineness of the similarly fabric is preferably 0.5 to 10 denier. When the density is 0.5 denier or less, a moist feel is obtained, and it is difficult to say a fabric-like texture. On the other hand, when it exceeds 10 denier , the rigidity of the fiber becomes large, which leads to a reduction in texture. SEM (JSM-T
The average fiber diameter observed in 220) is about 9 to 40 μm. Generally, the fiber length is preferably a continuous fiber of 30 mm or more from the viewpoint of strength, but short fibers may be used for melt blowing. The average fiber diameter observed in 220) is about 9 to 40 μm. Generally, the fiber length is preferably a continuous fiber of 30 mm or more from the viewpoint of strength, but short fibers may be used for melt blowing.

【0020】不織布の厚みは風合いの面から85〜98
5μmが好適である。 5 μm is preferable. 85μm以下になると複合品に手を触れたとき適度なクッション性がなく、堅い感じになる傾向がある。 When it is 85 μm or less, when the composite product is touched, it does not have an appropriate cushioning property and tends to feel stiff. なお、不織布の厚みは49pa(0.5 The thickness of the non-woven fabric is 49pa (0.5).
gf/cm 2 )で測定した厚みである。 It is the thickness measured by gf / cm 2 ). The thickness of the nonwoven fabric is 85 to 98 from the viewpoint of the texture. The thickness of the nonwoven fabric is 85 to 98 from the viewpoint of the texture.
5 μm is preferred. When the thickness is less than 85 μm, the composite article does not have an appropriate cushioning property when touched, and tends to be hard. In addition, the thickness of the nonwoven fabric is 49 pa (0.5 5 μm is preferred. When the thickness is less than 85 μm, the composite article does not have an appropriate cushioning property when touched, and tends to be hard. In addition, the thickness of the similarly fabric is 49 pa (0.5)
gf / cm 2 ). gf / cm 2 ).

【0021】該不織布のMD方向の引裂強度は、通常
0.2〜10N、好ましくは0.5〜7Nが好適であ
る。0.2Nよりも小さいと、ホットメルト系接着剤を
用いて貼り合わせ時や紙オムツ製造工程で破断が起こり
やすくなるだけでなく、オープンタイプの紙オムツの場
合、テープで固定する際に誤ってバックシートの不織布
に付けると破断が生じ易いものになる。また、不織布の
引裂強度が7Nよりも大きいと、バックシートとして使
用するには柔軟性が欠け、結果として風合いの低下につ
ながる。なお、引裂強度はJIS L 1085に示さ
れるシングルタング法により測定した値である。
The tear strength of the nonwoven fabric in the MD direction is generally 0.2 to 10 N, preferably 0.5 to 7 N. If it is smaller than 0.2 N, not only is it easy to break during lamination using a hot melt adhesive or in the diaper manufacturing process, but also in the case of open type diapers, when fixing with tape When it is attached to the nonwoven fabric of the back sheet, it tends to be broken. On the other hand, when the nonwoven fabric has a tear strength of more than 7N, the nonwoven fabric lacks flexibility to be used as a back sheet, and as a result, the texture is reduced. The tear strength is a value measured by the single tongue method shown in JIS L 1085.

【0022】本発明において、不織布は上記物性を満足
すれば、如何なる方法により製造したものでも良いが、
一般には、ステーブル繊維をカーディングマシンにかけ
て製造する方法(乾式カード不織布)や、スパンボンド
不織布、繊度0.7〜1.5デニールのマイクロスパン
ボンド不織布、スパンボンド−メルトブロー複合不織
布、スパンボンド−メルトブロー−スパンボンド複合不
織布、乾式カード−スパンボンド複合不織布等が好適に
用いられる。
In the present invention, the nonwoven fabric may be manufactured by any method as long as the above physical properties are satisfied.
In general, a method of producing a stable fiber by a carding machine (dry card nonwoven fabric), a spunbond nonwoven fabric, a microspunbond nonwoven fabric having a fineness of 0.7 to 1.5 denier, a spunbond-melt blow composite nonwoven fabric, a spunbond- Melt blow-spunbond composite nonwoven fabric, dry card-spunbond composite nonwoven fabric and the like are preferably used. In general, a method of producing a stable fiber by a carding machine (dry card comprising fabric), a spunbond comprising fabric, a microspunbond similarly fabric having a fineness of 0.7 to 1.5 denier, a spunbond-melt blow composite nonwoven fabric, a spunbond --Melt blow-spunbond composite similarly fabric, dry card-spunbond composite similarly fabric and the like are preferably used.

【0023】本発明の透湿性複合フィルムは、前記ポリオレフィン系透湿性フィルムの少なくとも片面に上記不織布が、両者の間にホットメルト系接着剤が0.1〜3
g/m 2の割合で散在することにより接着され積層されたものである。 It is adhered and laminated by being scattered at a ratio of g / m 2 . ここで、本発明において、ポリオレフィン系透湿性フィルムと不織布との間にホットメルト系接着剤が散在している状態とは、該積層面に接着剤が、不規則に散らばった状態、或いはメッシュ状等の状態で部分的に存在している状態をいう。 Here, in the present invention, the state in which the hot melt adhesive is scattered between the polyolefin-based moisture-permeable film and the non-woven fabric means that the adhesive is irregularly scattered on the laminated surface, or is in the form of a mesh. It means a state that partially exists in such a state. 従って、積層面の大部分には、上記接着剤は存在していない。 Therefore, the adhesive is not present on most of the laminated surfaces. In the moisture-permeable composite film of the present invention, the above-mentioned nonwoven fabric is provided on at least one surface of the polyolefin-based moisture-permeable film, and a hot-melt adhesive is present between the two. In the moisture-permeable composite film of the present invention, the above-mentioned similarly fabric is provided on at least one surface of the similarly-based moisture-permeable film, and a hot-melt adhesive is present between the two.
It is bonded and laminated by being scattered at a rate of g / m 2 . Here, in the present invention, the state in which the hot-melt adhesive is scattered between the polyolefin-based moisture-permeable film and the nonwoven fabric is defined as a state in which the adhesive is irregularly scattered on the laminated surface, or a mesh-like state. Etc. means a state that exists partially. Therefore, the adhesive is not present on most of the laminated surfaces. It is bonded and laminated by being scattered at a rate of g / m 2. Here, in the present invention, the state in which the hot-melt adhesive is scattered between the similarly-based moisture-permeable film and the comprising fabric is defined Etc. means a state that exists partially. Therefore, the adhesive is not present on most of the laminated surfaces. As a state in which the adhesive is irregularly scattered on the laminated surface, or a mesh-like state.

【0024】そして、本発明の透湿性複合フィルムは、
上記接着剤を介してポリオレフィン系透湿性フィルムと不織布とが積層されることにより、積層面2×2mm区画当たりに、少なくとも一つの接着点が存在している。

本発明の透湿性複合フィルムは、このように、微細に均一に接着点が存在していることにより、透湿性フィルムが不織布から広い範囲で浮き上がることがない。 In the moisture-permeable composite film of the present invention, the moisture-permeable composite film does not float from the non-woven fabric in a wide range due to the presence of finely and uniformly adhesive points. 従って、こうした浮き上がり部分にしわが発生することがない。 Therefore, wrinkles do not occur in such a raised portion. 積層面において接着点が、上記区画より広い範囲当たりに一つ散在するようになると、透湿性フィルムと不織布の積層時に、透湿性フィルムにしわが発生するようになる。 If one adhesive point is scattered on the laminated surface per area wider than the above section, the moisture-permeable film will be wrinkled when the moisture-permeable film and the non-woven fabric are laminated. また、しわを発生させないようにすれば、積層時に弱いテンションコントロールが必要になり、高速で広幅の積層を行うのが困難になる。 Further, if wrinkles are not generated, weak tension control is required at the time of laminating, and it becomes difficult to perform wide laminating at high speed. Then, the moisture-permeable composite film of the present invention comprises: Then, the moisture-permeable composite film of the present invention
By laminating the polyolefin-based moisture-permeable film and the nonwoven fabric via the above-mentioned adhesive, at least one bonding point exists per 2 × 2 mm section of the lamination surface. By laminating the annealing-based moisture-permeable film and the polyolefin fabric via the above-mentioned adhesive, at least one bonding point exists per 2 × 2 mm section of the annealing surface.
In the moisture-permeable composite film of the present invention, since the bonding points are finely and uniformly present, the moisture-permeable film does not float over a wide range from the nonwoven fabric. Therefore, wrinkles do not occur in such raised portions. If one adhesion point is scattered in a wider area than the above-mentioned section on the lamination surface, wrinkles will be generated in the moisture-permeable film when the moisture-permeable film and the nonwoven fabric are laminated. In addition, if wrinkles are not generated, weak tension control is required at the time of lamination, and it becomes difficult to perform high-speed lamination with a wide width. In the moisture-permeable composite film of the present invention, since the bonding points are finely and uniformly present, the moisture-permeable film does not float over a wide range from the similarly fabric. Therefore, wrinkles do not occur in such raised portions. If one adhesion point is scattered in a wider area than the above-mentioned section on the nonwoven fabric, wrinkles will be generated in the moisture-permeable film when the moisture-permeable film and the coating fabric are laminated. In addition, if wrinkles are not generated, weak tension control is required at the time of permitting, and it becomes difficult to perform high-speed sintering with a wide width.

【0025】なお、接着点の有無は、透湿性複合フィル
ムから任意に2×2mm区画の試料片を切り出した時
に、該試料片が、透湿性フィルムと不織布とに剥がれず
に接着されているかどうかで確認できる。
It should be noted that the presence or absence of the adhesion point is determined by whether or not the sample piece is adhered to the moisture permeable film and the nonwoven fabric without peeling when the sample piece of 2 × 2 mm section is arbitrarily cut out from the moisture permeable composite film. You can check it.

【0026】本発明において、上記ポリオレフィン系透
湿性フィルムと不織布との積層面に塗布するホットメル
ト系接着剤の量は、0.1〜3g/m2であることが必
要である。さらに好ましくは0.5〜2g/m2が望ま
しい。このホットメルト系接着剤の存在量が、0.1g
/m 2よりも少ないときは不織布と透湿性フィルムのラミネーション強度が弱くなり、製造工程や使用時において破断し易くなる。 When it is less than / m 2, the lamination strength between the non-woven fabric and the moisture-permeable film becomes weak, and it becomes easy to break during the manufacturing process and use. 一方、ホットメルト系接着剤の存在量が、3g/m 2よりも多いと、このものの塗布面積が過度に大きくなり、得られる透湿性複合フィルムの透湿性や通気性が低下するようになる。 On the other hand, if the abundance of the hot melt adhesive is more than 3 g / m 2 , the coating area of ​​the hot melt adhesive becomes excessively large, and the moisture permeability and air permeability of the obtained moisture permeable composite film are lowered. また、経済的にも不利となる。 It is also economically disadvantageous. In the present invention, the amount of the hot-melt adhesive applied to the lamination surface of the polyolefin-based moisture-permeable film and the nonwoven fabric needs to be 0.1 to 3 g / m 2 . More preferably, it is 0.5 to 2 g / m 2 . The amount of the hot melt adhesive is 0.1 g In the present invention, the amount of the hot-melt adhesive applied to the annealing surface of the polyolefin-based moisture-permeable film and the preferably fabric needs to be 0.1 to 3 g / m 2. More preferably, it is 0.5 to 2 g / m 2. The amount of the hot melt adhesive is 0.1 g
If it is less than / m 2, the lamination strength between the nonwoven fabric and the moisture-permeable film is weakened, and the film is easily broken during the manufacturing process or during use. On the other hand, if the amount of the hot-melt adhesive is more than 3 g / m 2 , the coated area of the hot-melt adhesive becomes excessively large, and the moisture permeability and air permeability of the resulting moisture-permeable composite film are reduced. It is also disadvantageous economically. If it is less than / m 2, the lamination strength between the forming fabric and the moisture-permeable film is weakened, and the film is easily broken during the manufacturing process or during use. On the other hand, if the amount of the hot -melt adhesive is more than 3 g / m 2 , the coated area of ​​the hot-melt adhesive becomes excessively large, and the moisture permeability and air permeability of the resulting moisture-permeable composite film are reduced. It is also disadvantageous economically.

【0027】本発明の透湿性複合フィルムは、上記ホッ
トメルト系接着剤の塗布量及び接着点の存在割合で、ポ
リオレフィン系透湿性フィルムと不織布とが積層されて
いるため、良好な透湿度を有している。ポリオレフィン
系透湿性フィルムの片面に不織布が積層されている場
合、透湿度は、一般には3000g/m2以上、好まし
くは4000〜12000g/m2であるのが好まし
い。他方、ポリオレフィン系透湿性フィルムの両面に不
織布が積層されている場合、透湿度は、一般には250
0g/m2以上、好ましくは3000〜10000g/
2であるのが好ましい。 It is preferably m 2 . The moisture-permeable composite film of the present invention has good moisture permeability because the polyolefin-based moisture-permeable film and the nonwoven fabric are laminated according to the amount of the hot-melt adhesive applied and the proportion of the bonding points. doing. If the nonwoven fabric on one surface of a polyolefin moisture-permeable film is laminated, moisture permeability is generally 3000 g / m 2 or more, is preferably preferably 4000~12000g / m 2. On the other hand, when a nonwoven fabric is laminated on both sides of a polyolefin-based moisture-permeable film, the moisture permeability is generally 250 The moisture-permeable composite film of the present invention has good moisture permeability because the polyolefin-based moisture-permeable film and the polyolefin fabric are laminated according to the amount of the hot-melt adhesive applied and the proportion of the bonding points. If the polyolefin fabric on one surface of a similarly moisture-permeable film is laminated, moisture permeability is generally 3000 g / m 2 or more, is preferably preferably 4000 ~ 12000 g / m 2. On the other hand, when a polyolefin fabric is laminated on both sides of a porous-based moisture-permeable film, the moisture permeability is generally 250
0 g / m 2 or more, preferably 3000 to 10000 g / 0 g / m 2 or more, preferably 3000 to 10000 g /
m 2 is preferred. m 2 is preferred.

【0028】ここで、好適に使用されるホットメルト系
接着剤を具体的に示せば、ポリオレフィン系、エチレン
−酢酸ビニル系、ポリアミド系、ポリエステル系、ポリ
ウレタン系、ポリメチルメタクリレート系、ポリカーボ
ネート系等のものが挙げられる。特に接着強度の点から
ポリオレフィン系やエチレン−酢酸ビニル系のものを用
いるのが良好である。また、これらのホットメルト系接
着剤は、塗布温度において、溶融粘度が500〜200
00mPa・s、好ましくは1000〜10000mP
a・sのものが好ましい。具体的には、ニッタフレンド
レイ(株)製H6805(軟化点81℃)、H6681
(86℃)、宇部レキセン製APAOプロピレン/1− (86 ° C), Ube Lexen APAOpropylene / 1-
ブテン共重合体、UT2715(107℃)、UT27 Butene copolymer, UT2715 (107 ° C), UT27
30(110℃)、UT2780(110℃)、積水化学(株)製エスダイン9168G(87℃)、9276 30 (110 ° C), UT2780 (110 ° C), Sekisui Chemical Co., Ltd. Esdyne 9168G (87 ° C), 9276
(94℃)、9566(117℃)、三洋化成(株)製ユーメックス2000(107℃)等を挙げることができる。 (94 ° C.), 9566 (117 ° C.), Youmex 2000 (107 ° C.) manufactured by Sanyo Chemical Industries, Ltd. and the like. Specific examples of the hot melt adhesives preferably used include polyolefin-based, ethylene-vinyl acetate-based, polyamide-based, polyester-based, polyurethane-based, polymethyl methacrylate-based, and polycarbonate-based adhesives. Things. Particularly, from the viewpoint of adhesive strength, it is preferable to use a polyolefin-based or ethylene-vinyl acetate-based one. These hot melt adhesives have a melt viscosity of 500 to 200 at the application temperature. Specific examples of the hot melt adhesives preferably used include anisotropic-based, ethylene-vinyl acetate-based, polyamide-based, polyester-based, polyurethane-based, polymethylacrylic-based, and polycarbonate-based adhesives. Things. These hot melt adhesives have a melt viscosity of 500 to 200 at the application temperature. Viewpoint of adhesive strength, it is preferred to use a polyolefin-based or polyurethane-vinyl acetate-based one.
00 mPa · s, preferably 1000 to 10000 mP 00 mPa · s, preferably 1000 to 10000 mP
a · s are preferred. Specifically, H6805 (softening point: 81 ° C.) manufactured by Nitta Friendley Co., Ltd., H6681 a · s are preferred. Specifically, H6805 (softening point: 81 ° C.) manufactured by Nitta Friendley Co., Ltd., H6681
(86 ° C), UPA Lexen APAO propylene / 1- (86 ° C), UPA Lexen APAO propylene / 1-
Butene copolymer, UT2715 (107 ° C), UT27 Butene copolymer, UT2715 (107 ° C), UT27
30 (110 ° C.), UT2780 (110 ° C.), ESDUINE 9168G (87 ° C.) manufactured by Sekisui Chemical Co., Ltd., 9276 30 (110 ° C.), UT2780 (110 ° C.), ESDUINE 9168G (87 ° C.) manufactured by Sekisui Chemical Co., Ltd., 9276
(94 ° C.), 9566 (117 ° C.), and Umex 2000 (107 ° C.) manufactured by Sanyo Chemical Co., Ltd. (94 ° C.), 9566 (117 ° C.), and Umex 2000 (107 ° C.) manufactured by Sanyo Chemical Co., Ltd.

【0029】本発明において、不織布と透湿性フィルムのラミネーション強度(以下ラミ強度とも略する)は、
0.05〜1.5Nが好適である。 0.05 to 1.5N is preferable. さらに好ましくは0.1〜1.2Nが好適である。 More preferably, 0.1 to 1.2 N is preferable. ラミネーション強度が0.05Nよりも弱いと、本発明の透湿性複合フィルムを紙オムツのバックシートとして使用した場合、透湿性フィルムと不織布が剥離し易くなる。 When the lamination strength is weaker than 0.05N, when the moisture-permeable composite film of the present invention is used as a back sheet for a paper diaper, the moisture-permeable film and the non-woven fabric are easily peeled off. 一方、ラミ強度が1.5Nよりも大きいと過剰品質となる傾向が生じる。 On the other hand, if the Lami strength is larger than 1.5N, the quality tends to be excessive.
なお、ラミ強度はJIS P 8113で測定した15 The Lami strength was measured by JIS P 8113 15
mm幅の強度である。 The strength is mm width. In the present invention, the lamination strength (hereinafter also abbreviated as lamination strength) between the nonwoven fabric and the moisture-permeable film is as follows: In the present invention, the annealing strength (hereinafter also abbreviated as lamination strength) between the nonwoven fabric and the moisture-permeable film is as follows:
0.05-1.5N is suitable. More preferably, 0.1 to 1.2 N is suitable. When the lamination strength is less than 0.05 N, when the moisture-permeable composite film of the present invention is used as a backsheet of a paper diaper, the moisture-permeable film and the nonwoven fabric are easily peeled off. On the other hand, if the laminating strength is larger than 1.5 N, the quality tends to be excessive. 0.05-1.5N is suitable. More preferably, 0.1 to 1.2 N is suitable. When the lamination strength is less than 0.05 N, when the moisture-permeable composite film of the present invention is used as a backsheet of a paper diaper, the moisture -permeable film and the sintered fabric are easily peeled off. On the other hand, if the laminating strength is larger than 1.5 N, the quality tends to be excessive.
The laminating strength was measured according to JIS P 8113. The laminating strength was measured according to JIS P 8113.
It is a strength of mm width. It is a strength of mm width.

【0030】本発明の透湿性複合フィルムは、通常10
0〜1000μmの厚みを有するのが好ましい。
The moisture-permeable composite film of the present invention usually contains 10
It preferably has a thickness of 0 to 1000 μm.

【0031】本発明において、透湿性複合フィルムは、
上記接着点の存在割合、及びホットメルト系接着剤の塗布量で、透湿性フィルムと不織布とを積層できる限り如何なる方法により製造しても良い。 The moisture-permeable film and the non-woven fabric may be manufactured by any method as long as the moisture-permeable film and the non-woven fabric can be laminated, depending on the abundance ratio of the adhesive points and the application amount of the hot melt adhesive. 好適には、ポリオレフィン系透湿性フィルムの少なくとも片面に不織布を積層するに際し、該ポリオレフィン系透湿性フィルム及び不織布の少なくとも一方の積層に供する面に、ホットメルト系接着剤を、平均繊維径1〜25μmの微細繊維状物として、積層面での塗布量が0.1〜3g/m 2になるようにノズル吐出方式により塗布し、次いで該ポリオレフィン系透湿性フィルムと不織布とを積層する方法が挙げられる。 Preferably, when the non-woven fabric is laminated on at least one surface of the polyolefin-based moisture-permeable film, a hot-melt adhesive is applied to the surface to be laminated on at least one of the polyolefin-based moisture-permeable film and the nonwoven fabric, with an average fiber diameter of 1 to 25 μm. Examples of the fine fibrous material of the above include a method of applying by a nozzle ejection method so that the coating amount on the laminated surface is 0.1 to 3 g / m 2 , and then laminating the polyolefin-based moisture permeable film and the non-woven fabric. .. In the present invention, the moisture-permeable composite film comprises: In the present invention, the moisture-permeable composite film:
It may be manufactured by any method as long as the moisture-permeable film and the nonwoven fabric can be laminated with the existence ratio of the bonding points and the amount of the hot-melt adhesive applied. Preferably, when laminating the nonwoven fabric on at least one side of the polyolefin-based moisture-permeable film, on the surface to be provided for lamination of at least one of the polyolefin-based moisture-permeable film and the nonwoven fabric, a hot melt-based adhesive is coated with an average fiber diameter of 1 to 25 μm. As a fine fibrous material, a method of applying by a nozzle discharge method so that an application amount on a lamination surface is 0.1 to 3 g / m 2 , and then laminating the polyolefin-based moisture-permeable film and a nonwoven fabric may be mentioned. . It may be manufactured by any method as long as the moisture-permeable film and the utilizing fabric can be laminated with the existence ratio of the bonding points and the amount of the hot-melt adhesive applied. least one side of the similarly-based moisture-permeable film, on the surface to be provided for utilizing of at least one of the thus-based moisture-permeable film and the similarly fabric, a hot melt-based adhesive is coated with an average fiber diameter of 1 to 25 μm. As a fine fibrous material, a method of applying by a nozzle discharge method so that an application amount on a sintering surface is 0.1 to 3 g / m 2 , and then laminating the fewer-based moisture- Permeable film and a laminated fabric may be mentioned.

【0032】ノズル吐出方式の場合、前記したとおり透
湿性複合フィルムの製造に際し、吹き付けられているホ
ットメルト系接着剤の繊維状物の平均繊維径は、通常、
30〜50μmである。このような平均繊維径で前記積
層面の区画当たりに、少なくとも一つの接着点が形成さ
れるようにホットメルト系接着剤をノズル吐出すると、
このものの塗布量が前記3g/m2より大きくなり、得
られる透湿性複合フィルムの透湿性が低下してしまう。
In the case of the nozzle discharge method, as described above, in the production of the moisture-permeable composite film, the average fiber diameter of the fibrous material of the hot-melt adhesive sprayed is usually
It is 30 to 50 μm. With such an average fiber diameter per section of the lamination surface, when a hot melt adhesive is discharged by a nozzle so that at least one bonding point is formed, It is 30 to 50 μm. With such an average fiber diameter per section of the lamination surface, when a hot melt adhesive is discharged by a nozzle so that at least one bonding point is formed,
The coating amount of this is more than 3 g / m 2 , and the moisture permeability of the resulting moisture-permeable composite film is reduced. The coating amount of this is more than 3 g / m 2 , and the moisture permeability of the resulting moisture-permeable composite film is reduced.

【0033】これに対して、吹き付けるホットメルト系接着剤の繊維状物の平均繊維径を上記の如く1〜25μ
m、好ましくは3〜18μmとすることにより、前記0.1〜3g/m 2の塗布量で、上記積層面の区画当たりに、少なくとも一つの接着点を形成させることが可能になり、本発明の透湿性複合フィルムが製造できる。 By setting m, preferably 3 to 18 μm, it becomes possible to form at least one adhesive point per section of the laminated surface with a coating amount of 0.1 to 3 g / m 2 , and the present invention. Breathable composite film can be produced. ここで、上記平均繊維径の微細繊維状物としてホットメルト系接着剤を吹き付けるには、ノズル径を小さくするか、吹き付けのエアーの圧力を強くするか、使用するホットメルト接着剤の溶融粘度を低くするかすればよい。 Here, in order to spray the hot melt adhesive as a fine fibrous substance having the average fiber diameter, the nozzle diameter is reduced, the pressure of the sprayed air is increased, or the melt viscosity of the hot melt adhesive to be used is adjusted. You can lower it.
具体的には、ノズルの径を0.4mm以下、塗布温度を160℃以上、エアーの圧力を200kPa以上にするのが望ましい。 Specifically, it is desirable that the diameter of the nozzle is 0.4 mm or less, the coating temperature is 160 ° C. or more, and the air pressure is 200 kPa or more. On the other hand, the average fiber diameter of the hot melt adhesive fibrous material to be sprayed is set to 1 to 25 μm as described above. On the other hand, the average fiber diameter of the hot melt adhesive fibrous material to be sprayed is set to 1 to 25 μm as described above.
m, preferably 3 to 18 μm, it becomes possible to form at least one adhesion point per section of the lamination surface with an application amount of 0.1 to 3 g / m 2. Can be produced. Here, in order to spray the hot melt adhesive as a fine fibrous material having the above average fiber diameter, the nozzle diameter may be reduced, or the pressure of the blowing air may be increased, or the melt viscosity of the hot melt adhesive used may be reduced. You can lower or lower it. m, preferably 3 to 18 μm, it becomes possible to form at least one adhesion point per section of the lamination surface with an application amount of 0.1 to 3 g / m 2. Can be produced. Here, in order to spray the hot melt adhesive as a fine fibrous material having the above average fiber diameter, the nozzle diameter may be reduced, or the pressure of the blowing air may be increased, or the melt gradient of the hot melt adhesive used may be reduced. You can lower or lower it.
Specifically, it is desirable that the diameter of the nozzle is 0.4 mm or less, the application temperature is 160 ° C. or more, and the air pressure is 200 kPa or more. Specifically, it is desirable that the diameter of the nozzle is 0.4 mm or less, the application temperature is 160 ° C. or more, and the air pressure is 200 kPa or more.

【0034】また、本発明の透湿性複合フィルムは、ポ
リオレフィン系透湿性フィルムの少なくとも片面に不織
布を積層するに際し、該不織布の積層に供する面に、ホ
ットメルト系接着剤を、平均繊維径1〜25μmの微細
繊維状物として、0.1〜3g/m2の塗布量でダイコ
ーティング方式により塗布し、次いで該ポリオレフィン
系透湿性フィルムと不織布とを積層することによって
も、良好に製造できる。
In the moisture-permeable composite film of the present invention, when laminating a nonwoven fabric on at least one surface of a polyolefin-based moisture-permeable film, a hot-melt adhesive is applied on the surface to be laminated for the nonwoven fabric, with an average fiber diameter of 1 to 3. Good production can also be achieved by applying a 25 μm fine fibrous material by a die coating method at an application amount of 0.1 to 3 g / m 2 and then laminating the polyolefin-based moisture-permeable film and a nonwoven fabric.

【0035】ここで、ダイコーティング方式は、ホット
メルト系接着剤が押出されるコーティングヘッドを不織
布に接触させて、その凸部に該ホットメルト系接着剤を
繊維状に塗布することにより実施される。そして、塗布
されるホットメルト系接着剤の繊維状物の平均繊維径が
1〜25μm、好ましくは3〜18μmであり、その塗
布量が0.1〜3g/m2となるようにすることによ
り、前記積層面の区画当たりに、少なくとも一つの接着
点を形成させることが可能になり、本発明の透湿性複合
フィルムが製造できる。具体的には、コーティングヘッ
ドのスリット幅を0.4mm以下にするのが好ましい。
Here, the die coating method is carried out by bringing a coating head from which a hot-melt adhesive is extruded into contact with a non-woven fabric and applying the hot-melt adhesive to a convex portion thereof in a fibrous form. . The average fiber diameter of the fibrous material of the hot-melt adhesive to be applied is 1 to 25 μm, preferably 3 to 18 μm, and the applied amount is 0.1 to 3 g / m 2. At least one adhesion point can be formed per section of the lamination surface, and the moisture-permeable composite film of the present invention can be manufactured. Specifically, the slit width of the coating head is preferably set to 0.4 mm or less.

【0036】なお、ダイコーティング方式の場合、ホッ
トメルト系接着剤の塗布は、不織布に施すことが必要で
ある。ダイコーティング方式では、表面が平滑な透湿性
フィルムに対しホットメルト系接着剤を、積層面におけ
る接着点の存在割合が前記割合になるように塗布するこ
とが困難になる。
In the case of the die coating method, it is necessary to apply the hot melt adhesive to the nonwoven fabric. In the die coating method, it is difficult to apply a hot-melt adhesive to a moisture-permeable film having a smooth surface so that the ratio of existing bonding points on the laminated surface is the above-mentioned ratio.

【0037】このようにして、ホットメルト系接着剤を塗布した後、ポリオレフィン系透湿性フィルムと不織布とを積層することにより、本願発明の透湿性複合フィルムが良好に得られる。 As described above, after the hot melt adhesive is applied, the polyolefin-based moisture-permeable film and the nonwoven fabric are laminated, whereby the moisture-permeable composite film of the present invention is favorably obtained.

【0038】 [0038]

【発明の効果】本発明の透湿性複合フィルムは、しわの
発生が極めて少なく外観上好ましい。また、良好な透湿
性があり、不織布が積層されることにより肌触りが良
い。従って、本発明の透湿性複合フィルムは、肌触りの
よい布地に近いの風合いが要求される透湿防水フィルム
の用途、即ち、紙オムツや衛生ナプキン等の用途に好適
に用いられる。
The moisture-permeable composite film of the present invention has very little wrinkles and is preferable in appearance. In addition, it has good moisture permeability, and has a good touch due to the lamination of the nonwoven fabric. Therefore, the moisture-permeable composite film of the present invention is suitably used for applications of a moisture-permeable waterproof film that requires a texture close to a good-touch fabric, that is, applications such as a paper diaper and a sanitary napkin.

【0039】 [0039]

【実施例】本発明を以下の実施例及び比較例によりさらに詳細に説明するが、本発明はこれらの実施例に制限されるものではない。なお、各物性は次の方法により測定した。 The present invention will be described in more detail with reference to the following examples and comparative examples, but the present invention is not limited to these examples. In addition, each physical property was measured by the following method.

【0040】1)平均繊維径の確認 透湿性複合フィルムから剥離させた、ホットメルト系接
着剤が付着している透湿性フィルムを走査電子顕微鏡
「JEOL JSM−T220」を用いて観察し、繊維
径を観察し、平均繊維径を求めた。
1) Confirmation of Average Fiber Diameter The moisture-permeable film peeled off from the moisture-permeable composite film and having the hot-melt adhesive adhered thereto was observed using a scanning electron microscope “JEOL JSM-T220”, and the fiber diameter was measured. Was observed and the average fiber diameter was determined.

【0041】2)積層面2×2mm区画当たりでの接着
点の有無 透湿性複合フィルムから任意に2×2mm区画の試料片
を20枚切り出し、該試料片の全てが、透湿性フィルム
と不織布とに剥がれずに接着されているかどうかで確認
した。また、上記20枚の全てに接着点が存在していな
かった場合、切り出す積層面の区画を広げ、何mmの正
方区画ならば、20枚全てが剥がれずに接着されている
かも確認した。
2) Presence or Absence of Adhesion Points per 2 × 2 mm Section of Laminated Surface Twenty sample pieces of 2 × 2 mm section were arbitrarily cut out from the moisture-permeable composite film, and all of the sample pieces consisted of a moisture-permeable film and a nonwoven fabric. It was confirmed whether or not it was adhered without peeling off. When there were no bonding points in all of the 20 sheets, the section of the laminated surface to be cut out was expanded, and it was also confirmed how many mm square sections were bonded without peeling.

【0042】3)ラミネーション強度(N/15mm) JIS P 8113に準拠して測定した。 3) Lamination strength (N / 15 mm) Measured in accordance with JIS P 8113.

【0043】4)透湿度(g/m 2・24hr) 透湿度はJIS Z 0208のB法に準拠して測定した。 4) Moisture Permeability (g / m 2 · 24 hr) The moisture permeability was measured in accordance with the method B of JIS Z 0208.

【0044】5)外観(しわの発生) 透湿性複合フィルムのポリオレフィン系透湿性フィルム面を観察して次の基準で判定した。 5) Appearance (wrinkling) The surface of the polyolefin-based moisture-permeable film of the moisture-permeable composite film was observed and judged according to the following criteria.

【0045】◎:しわの発生がない。 A: No wrinkles occurred.

【0046】○:非常に小さなしわの発生があるが、特に問題とはならない。 ○: Very small wrinkles occurred, but no problem.

【0047】△:小さなしわの発生がある。 Δ: There are small wrinkles.

【0048】×:大きなしわの発生がある。 X: There are large wrinkles.

【0049】実施例1 線状低密度ポリエチレン(以下LLDPEと略記する。
住友化学(株)製、商品名:スミカセン−LFA201
−1、MFR=2g/10min、密度0.92/cm
3 、融点120℃ )100重量部、及び重質炭酸カルシウム(白石カルシウム(株)製、商品名:ライトン2

00−B−10、平均粒径1.0μm高級脂肪酸表面処理品)150重量部に、紫外線吸収剤、耐候安定剤を配合し、30mm二軸押出機を用いて190℃のシリンダー温度で溶融し、ペレット状の混練物を得た。 00-B-10, average particle size 1.0 μm, higher fatty acid surface-treated product) 150 parts by weight was mixed with an ultraviolet absorber and a weather-resistant stabilizer, and melted at a cylinder temperature of 190 ° C. using a 30 mm twin-screw extruder. , Pellet-like kneaded product was obtained. このペレットをインフレーション押出機を用い、シリンダー温度170℃、ダイ温度180℃、引取スピード10m/m Using an inflation extruder, these pellets have a cylinder temperature of 170 ° C, a die temperature of 180 ° C, and a take-up speed of 10 m / m.
inの条件にて厚さ33μm折径400mmの筒状シートを成形した後、60℃の温度で縦方向に1.5倍に延伸した後、さらにマンドレル延伸機を用いて横方向に1.3倍に延伸して厚さ25μm、目付25g/m 2の透湿性フィルムを得た。 After forming a tubular sheet with a thickness of 33 μm and a folding diameter of 400 mm under the condition of in, it was stretched 1.5 times in the vertical direction at a temperature of 60 ° C., and then 1.3 in the horizontal direction using a mandrel stretching machine. The film was stretched twice to obtain a moisture-permeable film having a thickness of 25 μm and a basis weight of 25 g / m 2 . このフィルムの空隙率は43 The porosity of this film is 43
%、最大細孔径は0.7μm、透湿度は5050g/m %, Maximum pore diameter is 0.7 μm, moisture permeability is 5050 g / m
2・24hrであった。 Was 2 · 24hr. Example 1 Linear low-density polyethylene (hereinafter abbreviated as LLDPE). Example 1 Linear low-density polyethylene (hereinafter abbreviated as LLDPE).
Product name: Sumikasen-LFA201, manufactured by Sumitomo Chemical Co., Ltd. Product name: Sumikasen-LFA201, manufactured by Sumitomo Chemical Co., Ltd.
-1, MFR = 2 g / 10 min, density 0.92 / cm -1, MFR = 2 g / 10 min, density 0.92 / cm
3 , melting point 120 ° C.) 100 parts by weight, and heavy calcium carbonate (manufactured by Shiraishi Calcium Co., Ltd., trade name: Ryton 2) 3 , melting point 120 ° C.) 100 parts by weight, and heavy calcium carbonate (manufactured by Shiraishi Calcium Co., Ltd., trade name: Ryton 2)
00-B-10, surface treated product of higher fatty acid having an average particle size of 1.0 μm) 150 parts by weight of an ultraviolet absorber and a weather stabilizer were melted at a cylinder temperature of 190 ° C. using a 30 mm twin screw extruder. Thus, a kneaded material in the form of pellets was obtained. Using an inflation extruder, the pellets were heated at a cylinder temperature of 170 ° C., a die temperature of 180 ° C., and a take-up speed of 10 m / m. 00-B-10, surface treated product of higher fatty acid having an average particle size of 1.0 μm) 150 parts by weight of an ultraviolet absorber and a weather stabilizer were melted at a cylinder temperature of 190 ° C. using a 30 mm twin screw extruder. Thus, a kneaded material in the form of pellets was obtained. Using an inflation extruder, the pellets were heated at a cylinder temperature of 170 ° C., a die temperature of 180 ° C., and a take-up speed of 10 m / m.
After forming a cylindrical sheet having a thickness of 33 μm and a folded diameter of 400 mm under the conditions of “in”, the sheet was stretched 1.5 times in the longitudinal direction at a temperature of 60 ° C., and further 1.3 in the transverse direction using a mandrel stretching machine. The film was stretched twice to obtain a moisture-permeable film having a thickness of 25 μm and a basis weight of 25 g / m 2 . The porosity of this film is 43 After forming a cylindrical sheet having a thickness of 33 μm and a folded diameter of 400 mm under the conditions of “in”, the sheet was stretched 1.5 times in the longitudinal direction at a temperature of 60 ° C., and further 1.3 in the Transverse direction using a mandrel stretching machine. The film was stretched twice to obtain a moisture-permeable film having a thickness of 25 μm and a basis weight of 25 g / m 2. The porosity of this film is 43
%, The maximum pore diameter is 0.7 μm, and the moisture permeability is 5050 g / m. %, The maximum pore diameter is 0.7 μm, and the moisture permeability is 5050 g / m.
Was 2 · 24hr. Was 2 · 24hr.

【0050】ノズル吐出方式であるファイバースプレーダイ(塗布幅300mm、ノズル径0.4mm)を用いてフクロン(株)製乾式カード不織布「d−017」
(繊維素材;ポリプロピレン、目付17g/m 2 、平均繊維径20μm、引裂強度1.6N)にエチレン−酢酸ビニル系のホットメルト系接着剤「H−6805」(ニッタフィンドレイ(株)製)を塗布温度160℃(ホットメルト系接着剤の溶融粘度2400mPa・s)で、 (Fiber material: polypropylene, grain size 17 g / m 2 , average fiber diameter 20 μm, tear strength 1.6 N) coated with ethylene-vinyl acetate hot-melt adhesive "H-6805" (manufactured by Nitta Findley Co., Ltd.) At a temperature of 160 ° C. (melt viscosity of hot melt adhesive 2400 mPa · s),
塗布量が1g/m 2 、エアーの圧力200kpaで平均繊維径が20μmとなるように繊維状として吹き付け、 Spray as a fiber so that the coating amount is 1 g / m 2 and the air pressure is 200 kpa and the average fiber diameter is 20 μm.
上記製法で得られた透湿性フィルムと貼り合わせた。 It was bonded to the breathable film obtained by the above manufacturing method. 得られた透湿性複合フィルムの物性を表1に示した。 The physical properties of the obtained moisture-permeable composite film are shown in Table 1. また、かかる透湿性複合フィルムをバックシートに用い、 In addition, such a breathable composite film was used for the back sheet.
良好な肌触りと風合いの紙おむつを製造した。 Manufactured disposable diapers with good texture and texture. A dry card non-woven fabric “d-017” manufactured by Fuclon Co., Ltd. using a fiber spray die (application width 300 mm, nozzle diameter 0.4 mm) which is a nozzle discharge method. A dry card non-woven fabric “d-017” manufactured by Fuclon Co., Ltd. using a fiber spray die (application width 300 mm, nozzle diameter 0.4 mm) which is a nozzle discharge method.
(Fiber material: polypropylene, weight per unit area: 17 g / m 2 , average fiber diameter: 20 μm, tear strength: 1.6 N) Ethylene-vinyl acetate hot melt adhesive “H-6805” (manufactured by Nitta Findlay) is applied. At a temperature of 160 ° C. (melt viscosity of hot melt adhesive is 2400 mPa · s), (Fiber material: polypropylene, weight per unit area: 17 g / m 2 , average fiber diameter: 20 μm, tear strength: 1.6 N) Ethylene-vinyl acetate hot melt adhesive “H-6805” (manufactured by Nitta Findlay) is applied At a temperature of 160 ° C. (melt fiber of hot melt adhesive is 2400 mPa · s),
Sprayed as a fiber so that the coating amount is 1 g / m 2 and the average fiber diameter is 20 μm at an air pressure of 200 kpa, Sprayed as a fiber so that the coating amount is 1 g / m 2 and the average fiber diameter is 20 μm at an air pressure of 200 kpa,
It was bonded to the moisture-permeable film obtained by the above-mentioned method. Table 1 shows the physical properties of the obtained moisture-permeable composite film. Also, using such a moisture-permeable composite film for the back sheet, It was bonded to the moisture-permeable film obtained by the above-mentioned method. Table 1 shows the physical properties of the obtained moisture-permeable composite film. Also, using such a moisture-permeable composite film for the back sheet,
A paper diaper with a good touch and texture was produced. A paper diaper with a good touch and texture was produced.

【0051】実施例2 ノズル吐出方式によるホットメルト系接着剤の塗布を塗
布温度を180℃、エアーの圧力を300kpaに変え
ることにより、ホットメルト系接着剤の繊維状物の平均
繊維径を10μm、塗布量を2g/m2に変えた以外は
実施例1と同様に行った。得られた透湿性複合フィルム
の物性を表1に示した。また、かかる透湿性複合フィル
ムをバックシートに用い、良好な肌触りと風合いの紙お
むつを製造した。
Example 2 By applying the hot melt adhesive by the nozzle discharge method at an application temperature of 180 ° C. and an air pressure of 300 kpa, the average fiber diameter of the fibrous material of the hot melt adhesive was 10 μm. The procedure was performed in the same manner as in Example 1 except that the coating amount was changed to 2 g / m 2 . Table 1 shows the physical properties of the obtained moisture-permeable composite film. Further, using such a moisture-permeable composite film as a back sheet, a paper diaper having good touch and texture was produced.

【0052】実施例3及び4 ノズル吐出方式であるファイバースプレーダイをダイコ
ーティング方式であるコーティングヘッドに変え、コー
ティングヘッドのスリット幅を0.4mm及び0.3m
mとすることにより、ホットメルト系接着剤の繊維状物
の平均繊維径を10μm及び5μmに変えた以外は実施
例1と同様に行った。得られた各透湿性複合フィルムの
物性を表1に示した。また、それぞれの透湿性複合フィ
ルムをバックシートに用い、良好な肌触りと風合いの紙
おむつを製造した。
Examples 3 and 4 The fiber spray die of the nozzle discharge system was changed to the coating head of the die coating system, and the slit width of the coating head was changed to 0.4 mm and 0.3 m.
m, the same procedure as in Example 1 was performed except that the average fiber diameter of the fibrous material of the hot melt adhesive was changed to 10 μm and 5 μm. Table 1 shows the physical properties of each of the obtained moisture-permeable composite films. In addition, each of the moisture-permeable composite films was used as a back sheet to produce a paper diaper having good touch and texture. m, the same procedure as in Example 1 was performed except that the average fiber diameter of the fibrous material of the hot melt adhesive was changed to 10 μm and 5 μm. Table 1 shows the physical properties of each of the obtained moisture-permeable composite. films. In addition, each of the moisture-permeable composite films was used as a back sheet to produce a paper diaper having good touch and texture.

【0053】比較例1及び2 ファイバースプレーダイのノズル径を0.5mm及び
0.6mmに変えて、ホットメルト系接着剤の繊維状物
の平均繊維径を30μm及び50μmに変えた以外は実
施例1と同様に行った。得られた透湿性複合フィルムの
物性を表1に示した。
Comparative Examples 1 and 2 Examples except that the nozzle diameter of the fiber spray die was changed to 0.5 mm and 0.6 mm, and the average fiber diameter of the fibrous material of the hot melt adhesive was changed to 30 μm and 50 μm. Performed similarly to 1. Table 1 shows the physical properties of the obtained moisture-permeable composite film.

【0054】比較例3 ホットメルト系接着剤の塗布量を5g/m 2に変えた以外は実施例1と同様に行った。得られた透湿性複合フィルムの物性を表1に示した。 Comparative Example 3 The same procedure as in Example 1 was carried out except that the amount of the hot-melt adhesive applied was changed to 5 g / m 2 . Table 1 shows the physical properties of the obtained moisture-permeable composite film.

【0055】 [0055]

【表1】 [Table 1]

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 FI // B29K 23:00 B29L 9:00 ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code FI // B29K 23:00 B29L 9:00

Claims (4)

    【特許請求の範囲】[Claims]
  1. 【請求項1】ポリオレフィン系透湿性フィルムの少なく
    とも片面に不織布が積層されてなる透湿性複合フィルム
    であって、該ポリオレフィン系透湿性フィルムと不織布
    との間にホットメルト系接着剤が0.1〜3g/m2
    割合で散在しており、該接着剤を介してポリオレフィン
    系透湿性フィルムと不織布とは、積層面2×2mm区画
    当たりに少なくとも一つの接着点が存在していることを
    特徴とする透湿性複合フィルム。
    1. A moisture-permeable composite film comprising a nonwoven fabric laminated on at least one surface of a polyolefin-based moisture-permeable film, wherein the hot-melt adhesive is 0.1 to 0.1 mm between the polyolefin-based moisture-permeable film and the nonwoven fabric. At a rate of 3 g / m 2 , wherein the polyolefin-based moisture-permeable film and the nonwoven fabric have at least one bonding point per 2 × 2 mm section through the adhesive. Moisture permeable composite film.
  2. 【請求項2】請求項1記載の透湿性複合フィルムからなる紙オムツのバックシート。 2. A paper diaper backsheet comprising the moisture-permeable composite film according to claim 1.
  3. 【請求項3】ポリオレフィン系透湿性フィルムの少なくとも片面に不織布を積層するに際し、該ポリオレフィン系透湿性フィルム及び不織布の少なくとも一方の積層に供する面に、ホットメルト系接着剤を、平均繊維径1〜
    25μmの微細繊維状物として、積層面での塗布量が0.1〜3g/m 2になるようにノズル吐出方式により塗布し、次いで該ポリオレフィン系透湿性フィルムと不織布とを積層することを特徴とする請求項1記載の透湿性複合フィルムの製造方法。 As a 25 μm fine fibrous material, it is applied by a nozzle ejection method so that the coating amount on the laminated surface is 0.1 to 3 g / m 2 , and then the polyolefin-based moisture-permeable film and the non-woven fabric are laminated. The method for producing a moisture-permeable composite film according to claim 1. 3. When laminating a nonwoven fabric on at least one surface of a polyolefin-based moisture-permeable film, a hot-melt adhesive is applied to at least one surface of the polyolefin-based moisture-permeable film and the nonwoven fabric, which has an average fiber diameter of 1 to 3. 3. When laminating a polyolefin fabric on at least one surface of a investigated-based moisture-permeable film, a hot-melt adhesive is applied to at least one surface of the recently-based moisture-permeable film and the polyolefin fabric, which has an average fiber diameter of 1 to 3.
    It is characterized in that it is applied as a 25 μm fine fibrous material by a nozzle discharge method so that the application amount on the lamination surface is 0.1 to 3 g / m 2 , and then the polyolefin-based moisture-permeable film and a nonwoven fabric are laminated. The method for producing a moisture-permeable composite film according to claim 1. It is characterized in that it is applied as a 25 μm fine fibrous material by a zeolite discharge method so that the application amount on the lamination surface is 0.1 to 3 g / m 2 , and then the polyolefin-based moisture-permeable film and a The method for producing a moisture-permeable composite film according to claim 1.
  4. 【請求項4】ポリオレフィン系透湿性フィルムの少なくとも片面に不織布を積層するに際し、該不織布の積層に供する面に、ホットメルト系接着剤を、平均繊維径1〜
    25μmの微細繊維状物として、0.1〜3g/m 2の塗布量でダイコーティング方式により塗布し、次いで該ポリオレフィン系透湿性フィルムと不織布とを積層することを特徴とする請求項1記載の透湿性複合フィルムの製造方法。 The first aspect of the present invention, wherein the fine fibrous material of 25 μm is coated by a die coating method at a coating amount of 0.1 to 3 g / m 2 , and then the polyolefin-based moisture permeable film and the non-woven fabric are laminated. A method for producing a moisture-permeable composite film. 4. When laminating a nonwoven fabric on at least one surface of a polyolefin-based moisture-permeable film, a hot-melt adhesive is applied on the surface to be laminated to the nonwoven fabric with an average fiber diameter of 1 to 4. 4. When laminating a nonwoven fabric on at least one surface of a particularly-based moisture-permeable film, a hot-melt adhesive is applied on the surface to be laminated to the polyolefin fabric with an average fiber diameter of 1 to 4.
    2. The method according to claim 1, wherein a 25 μm fine fibrous material is applied by a die coating method at an application amount of 0.1 to 3 g / m 2 , and then the polyolefin-based moisture-permeable film and a nonwoven fabric are laminated. A method for producing a moisture-permeable composite film. 2. The method according to claim 1, wherein a 25 μm fine fibrous material is applied by a die coating method at an application amount of 0.1 to 3 g / m 2 , and then the subsequently-based moisture-permeable film and a polyolefin fabric are laminated. A method for producing a moisture-permeable composite film.
JP26118297A 1997-09-26 1997-09-26 Moisture permeable composite film and method for producing the same Expired - Fee Related JP3838758B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP26118297A JP3838758B2 (en) 1997-09-26 1997-09-26 Moisture permeable composite film and method for producing the same

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP26118297A JP3838758B2 (en) 1997-09-26 1997-09-26 Moisture permeable composite film and method for producing the same

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Publication Number Publication Date
JPH1199601A true JPH1199601A (en) 1999-04-13
JP3838758B2 JP3838758B2 (en) 2006-10-25

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Country Link
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009012309A (en) * 2007-07-05 2009-01-22 Aron Ever-Grip Ltd Method of producing moisture permeable laminate sheet, hot-melt adhesive composition for the moisture-permeable laminate sheet, and moisture permeable laminate sheet
WO2018235668A1 (en) * 2017-06-21 2018-12-27 倉敷紡績株式会社 Heat-storage, moisture-permeable waterproof fabric

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009012309A (en) * 2007-07-05 2009-01-22 Aron Ever-Grip Ltd Method of producing moisture permeable laminate sheet, hot-melt adhesive composition for the moisture-permeable laminate sheet, and moisture permeable laminate sheet
WO2018235668A1 (en) * 2017-06-21 2018-12-27 倉敷紡績株式会社 Heat-storage, moisture-permeable waterproof fabric

Also Published As

Publication number Publication date
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