JP4232084B2 - Fiber laminate for helmet - Google Patents
Fiber laminate for helmet Download PDFInfo
- Publication number
- JP4232084B2 JP4232084B2 JP2002365486A JP2002365486A JP4232084B2 JP 4232084 B2 JP4232084 B2 JP 4232084B2 JP 2002365486 A JP2002365486 A JP 2002365486A JP 2002365486 A JP2002365486 A JP 2002365486A JP 4232084 B2 JP4232084 B2 JP 4232084B2
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- fine particles
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- laminate
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Landscapes
- Helmets And Other Head Coverings (AREA)
Description
【0001】
【発明が属する技術分野】
本発明は、人に快適性を与えるために使用することができるヘルメット用繊維積層体であり、高湿度環境においては吸湿性、結露防止性を発揮し、高温の環境においては、冷感を与え、低温環境においては吸湿発熱による保温性など、より快適性を向上させる効果を発揮することができるヘルメット用繊維積層体に関するものである。
【0002】
【従来の技術】
従来より、ヘルメット内部のむれ感を低減する方法は各種方法が取られているが、満足する方法はない。多層構造布帛において、非接触層部に親水層を形成し、汗・水分を吸水し、むれ感を低減する方法(特許文献1、2など)は、吸湿性は優れているが、放湿性は劣る。また、高分子ポリマーなどを入れた袋や通気管を備えた冷却具を装備する方法(特許文献3など)では、ヘルメットの構造が複雑になってしまう欠点がある。
【0003】
【特許文献1】
特開2001−248010号公報(請求項1など)
【特許文献2】
特開平09−137380号公報(請求項1など)
【特許文献3】
特開2000−24100号公報(請求項1など)
【0004】
【発明が解決しようとする課題】
本発明は、上記した従来技術での問題点を解決し、頭部内のむれ感を低減し、着用快適性を高めるためのヘルメット部材としての繊維積層体を提供しようとするものである。
【0005】
【課題を解決するための手段】
本発明は、以下の構成を採用するものである。すなわち、
1.通気性シート(A)、高吸放湿性微粒子とバインダー樹脂とを含有する中間層及び通気性シート(B)又は/及び非通気性シート(C)とを有する積層体であり、該中間層中の高吸放湿性微粒子の含有量が40〜3000g/m2であることを特徴とするヘルメット用繊維積層体。
2.通気性シート(A)、高吸放湿性微粒子とバインダー樹脂とを含有する中間層及び通気性シート(B)及び繊維構造体層(D)とを有する積層体であり、該中間層中の高吸放湿性微粒子の含有量が40〜3000g/m2であることを特徴とするヘルメット用繊維積層体。
3.中間層のバインダー樹脂が粉末型熱接着性接着剤であり、高吸湿性微粒子/粉末型熱接着性接着剤の質量比が60/40〜95/5であることを特徴とする前記1又は2に記載のヘルメット用繊維積層体。
4.粉末型熱接着性接着剤の粒子径が高吸湿性微粒子の粒子径よりも小さいことを特徴とする前記1〜3のいずれかに記載のヘルメット用繊維積層体。
【0006】
【発明の実施の形態】
以下、本発明を詳細に説明する。
本発明における通気性シート(A)及び(B)は、スパンボンド不織布、ニードルパンチフェルト不織布、ケミカルボンド不織布、サーマルボンド不織布、スパンレース不織布、メルトブロー不織布、さらには、これらの積層体(例SMS等)、連続線状立体網状体、シングルニット、ダブルニット等の丸編、トリコット、ラッセル、ダブルラッセル等の経編、または織物などの繊維構造体である。
【0007】
通気性シート(A)及び(B)の素材は、ポリエステル系、ポリアミド系、ポリアクリルニトリル系、ポリエチレン系、ポリプロピレン系、ポリブチレンテレフタレート系、ポリテトラメチレンテレフタレート系、ポリウレタン系、ポリフェニレンサルファイド系等の合成繊維、レーヨン、アセテート等の化学繊維、木綿、麻、シルク、ウール、羽毛などの天然繊維もしくはこれらの混用素材が使用でき、通気性シート(A)及び(B)は同じであっても異なっていてもよいが、中間層形成のための粒子支持体として使用する通気性シート(A)は、高吸放湿性微粒子とバインダー樹脂を確実に保持し、固定しやすい形状、厚みであるものが好ましい。この意味で、凹凸を付与した長繊維や短繊維の不織布が好ましい。
凹凸の形成する手段としては、ニードルパンチ加工、プリーツ加工、厚さの大きいエアースルー加工等があるが、好ましくはニードルパンチ加工である。
【0008】
本発明における通気性シートの厚さ及び目付は、用途、素材により異なるが、適宜2〜30mm程度の範囲で変えることが出来る。例えば、自動車座席の場合は、厚みは2mmから15mmであり、目付は100g/m2から900g/m2の範囲が好適である。
【0009】
本発明の積層体の中間層中には、高吸放湿性微粒子とバインダー樹脂とを含有する。高吸放湿性微粒子とは、高吸湿性で、かつ放湿性に優れた微粒子であれば、特に化学構造的に限定されるものではなく、例えば、吸湿性シリカなどの無機系、もしくはポリウレタン系、ポリアミド系、ポリエステル系およびポリアクリレート系などの種々の有機系微粒子が使用可能であるが、有機微粒子が好ましい。この例として、ポリスチレン系、ポリアクリロニトリル系、ポリアクリル酸エステル系、ポリメタクリル酸エステル系のいずれかのビニル系重合体で、スルホン酸基、カルボン酸基、リン酸基あるいは、それらの金属塩の少なくとも1種の親水基を有し、かつジビニルベンゼン、トリアリルイソシアネートまたはヒドラジンのいずれかで架橋された重合体微粒子が挙げられる。
【0010】
高吸放湿性微粒子の吸湿率(20℃、65%RH)が18%以上が好ましく、より好ましくは25%以上、さらに好ましくは40%以上である。
【0011】
高吸放湿性有機微粒子のうち、特に好ましいものは、アクリロニトリルを主体としたアクリロニトリル系重合体微粒子にヒドラジン処理により架橋結合を導入して、窒素含有量を0.9〜8.1質量%、好ましくは2.9〜8.1質量%の範囲内に調整し、加水分解処理により、残存しているニトリル基量の1.0〜5.0meq/g、好ましくは2.6〜5.0meq/gにカルボキシル基を導入し、次いで既カルボキシル基の50〜90mol%、好ましくは60〜85mol%をMg、Ca、Cu、Zn、Al、Ag、Feより選ばれる1種あるいは2種以上の金属塩型としたものである。なお、調湿機能を損なわない範囲でこれら以外の金属も使用することができる。しかし、その含有量はカルボキシル基量として、5mol%以下である。
【0012】
高吸放湿性微粒子の粒度は、平均粒子径が0.01〜200μm程度のものが使用できるが、調湿調温性の点では、できるだけ細かい方が好ましいが、作業性、バインダー樹脂との混和性の点では、見掛けの粒度は、できるだけ大きいことが好ましく、0.1〜1mm程度の顆粒状に予め成形したものも使用できる。1次的平均粒子径は3μm未満が好ましい。
【0013】
次に、高吸放湿性微粒子とともに中間層を形成するバインダー樹脂は、粉末型熱接着性接着剤が高吸放湿性微粒子と均一に混合できるので好ましい。粉末型熱接着性接着剤の粒子径は、吸高吸放湿性微粒子よりも小さいことが好ましい。粉末型熱接着性接着剤の粒子径が大きいと接着加工後、未接着の高吸放湿性微粒子が多くなり粒子飛散の問題が発生しやすい傾向がある。粉末型熱接着性接着剤の粒子径は高吸放湿性微粒子の1/5以下であることがより好ましい。
【0014】
接着剤樹脂の種類としては、ポリエチレン系、エチレンビニルアルコール系、ポリビニルアルコール系、シリコン系、ウレタン系、アクリル系、ポリエステル系、ポリアミド系、ポリエチレンオキサイド系、ポリオレフィン系またエチレン-アクリル共重合体等の2成分および3成分共重合体などの樹脂が挙げられ、吸湿性微粒子との相溶性、熱接着性に問題なければ、特に限定されないが、親水性樹脂が高吸放湿性微粒子の効果を阻害しない点で好ましい。この意味では吸湿率は3〜50%のものが好ましい。
【0015】
親水性樹脂としては、親水性セグメントとして、ポリアルキレンオキサイド付加重合体、スルホン酸塩、カルボン酸塩等の極性親水基、アミド変成基などを導入した親水性シリコン系樹脂、親水性ウレタン系樹脂、親水性ポリアミド系樹脂、親水性ポリエチレンオキサイド系樹脂で、樹脂自身の吸湿性、透湿性が高いものが挙げられる。
【0016】
中間層における高吸湿性微粒子/粉末型熱接着性接着剤の質量比は、60/40〜95/5が好ましい。高吸湿性微粒子の含有率が95質量%を超えると、高吸湿性微粒子の固着が不十分になり、また、60質量%を下回ると本発明の効果が得られにくくなる傾向がある。
【0017】
中間層中の高吸放湿性微粒子の含有量は、40〜3000g/m2である。高吸放湿性微粒子の含有量が3000g/m2を超えると、高吸湿性微粒子の固着が不十分になり、また、40g/m2を下回ると本発明の効果が得られにくくなる。高吸放湿性微粒子の含有量は、その目的に応じて適宜選択することができるが、製造のしやすさ、製造コストなどから、100〜1000g/m2が好ましく、より好ましくは150〜600g/m2、さらに好ましくは200〜500g/m2である。また、中間層中には、目的に応じて、他の吸湿性粒子、活性炭粉末、セラミックス粒子、シリカ粒子、抗菌剤、消臭剤などの機能性粒子を含有させることができる。
【0018】
本発明の通気性シート(A)、(B)及び中間層からなる積層体の目付は、用途によっても異なるが、通常200〜3500g/m2、厚さ1.0〜50mmが好ましい。取扱い性、製造のしやすさから、好ましくは、目付400〜2000g/m2、厚さ1.5〜30mmであり、さらに好ましくは、目付500〜1000g/m2、厚さ2〜10mmである。
【0019】
本発明の積層体は、一方の通気性シートの上に、高吸湿性微粒子と熱接着性の樹脂バインダーとを付与して接着面を形成すると同時に、該接着面に他の通気性シート又は非通気性シートを重ねて熱接着する方法が好適に採用される。より具体的には、高吸湿性微粒子と粉末型熱接着性接着剤とを質量比が60/40〜95/5で混合し、該混合物を凹凸が付与された通気性シート(A)上に塗布し、次いで、該塗布面の上に通気性シート(B)又は非通気性シート(C)を重ね、かつ粉末型熱接着性接着剤の融点以上の温度で熱処理することを特徴とすることによって製造することができる。高吸湿性微粒子と粉末型熱接着性接着剤との混合物を通気性シート上に塗布する方法としては、熱ラミネート方式が好ましい。
【0020】
本発明の積層体における通気性シートは、高い吸湿性と高い放湿性とを発揮する中間層の保持及び保護層であるのみならず、水分を含んだ空気の導入層又は放出層の役割を果たすものである。したがって、中間層が水分を含んだ空気を導入して吸湿すると、吸湿による発熱を発現し、逆に中間層が水分を放湿すると、放湿による吸熱、冷却を発現することができる。
【0021】
本発明の積層体においては、非通気性シート(C)は、通気性シート(B)を介して又は直接に中間層に積層することができる。積層の方法は、特に限定はされず、公知の接着方式が用途及び必要に応じて採用することができ、部分接着、全面接着、仮接着、面ファスナーなどの接着方式あるいは重ねるだけでもよい。例えば、この積層体の非通気性シート(C)側を人体の反対側になるように使用すると、人体から発生する水分は逃げ場所がないのでほとんど中間層が吸収することになり、吸湿発熱性を高めることができ、保温性が向上する。
【0022】
非通気性シート(C)としては、フィルム、シートあるいはフィルムと不織布の積層体などが使用可能である。フィルムやシートは、公知の合成樹脂製のものが使用でき、用途に応じて必要により防水性、透湿性、耐候性などのものを適宜使用することができる。
【0023】
また、本発明の積層体において、中間層の両側が通気性シートになる場合は、さらに繊維構造体層(D)が積層される。この繊維構造体層(D)とは、前記の通気性シート(A)や(B)を構成する繊維と同様な繊維が使用でき、編物、織物、立体網状体、硬わたクッション材などである。繊維構造体層(D)の目付や厚さは、用途や目的によって適宜選択できるが、通常、目付は40〜1000g/m2、厚さ0.1〜50mmが好適である。
【0024】
繊維構造体層(D)の積層の方法は、特に限定はされず、公知の接着方式を用途及び必要に応じて公知の接着方式を適宜採用することができる。部分接着、全面接着、仮接着、面ファスナーなどの接着方式あるいは重ねるだけでもよい。例えば、この積層体の繊維構造体層(D)側を人体の反対側になるように使用すると、人体から発生する水分は、中間層、繊維構造体層(D)を通って放出することができ、中間層からの水分の放出に伴う吸熱、冷却効果によって冷感を得ることができる。
【0025】
本発明の調湿調温性の繊維積層体をヘルメットとして使用すると、むれ感、汗ばみを感じることがなく、快適性に優れたヘルメットを提供することが出来る。
【0026】
本発明の積層体は、単位面積当り多量の水分を吸収でき、かつ放出することができる。例えば、高吸放湿性微粒子の吸湿率(20℃、65%RH)が40%の高吸放湿性微粒子を1m2の当り2500gを中間層に含有させると、20℃、65%RHの標準状態でも、1kg/m2もの水分を吸湿することができる。より高温、多湿では、さらに多くの水分を吸収でき、かつ放出することができる。したがって、シ−ト状の除湿材、乾燥材、調湿材、調温材としても有用である。
【0027】
【実施例】
以下に本発明の実施例を具体的に説明するが、本発明はこれらの実施例にのみ限定されるものではない。
【0028】
着用試験(むれ感の評価):
作成したヘルメットを被りながら、被験者10名が木綿65質量%/ポリエステル35質量%混のニットシャツ及び木綿100%のズボンを着用して、25℃、50%RH環境下で、トレッドミル(約130kcal相当)で運動し、運動10分後の主観評価を実施した。
○・・・ むれ感が少ない
△ ・・・ やや蒸れる
× ・・・ むれ感が大きい
【0029】
積層体表面からの粉もれ試験:
屈曲試験:MIT試験機(屈曲試験機)JIS P8115に準じて実施した。
サンプルの4方ヒートシールで止めて屈曲試験を行なった。
250g荷重 135° 175回/min.、1000回
○・・・ほとんど漏れなし
△ ・・・少し漏れる
× ・・・著しく漏れる
【0030】
ヘルメットの作成方法
市販のヘルメット(ABS樹脂製、飛来落下物用・電気用、トーヨー(株)製)を用意し、ヘルメット内部に14cm×14cmの調温調湿積層体を装着した。
【0031】
実施例1
調温調湿性繊維積層体の作製:
ニードルパンチ加工されたポリエステルスパンボンド不織布(繊度2.2dtex、厚さ1.7mm、目付130g/m2)(下層)に、平均粒子径50μmの架橋アクリル系微粒子(日本エクスラン工業社製HU100P、20℃、65%RH環境下の吸湿率40%)と融点106℃平均粒径10μmのエチレン-アクリル共重合体パウダーとの混合物(85/15質量比)を200g/m2の付与量になるようにパウダー塗布機で塗布した後、更にその上からを下層と同様の不織布を積層し、150℃でラミネート加工機を用いて接着積層を行い見掛け厚さ3mm、目付460g/m2の調温調湿積層体を得た。得られた積層体の周囲を変性オレフィン系樹脂(融点110℃)を用いて巾2mm 厚さ2mmの樹脂シールを行なった。次いで調温調湿積層体の屈曲試験を行なったところ、積層体表面からの微粒子の飛散は確認されなかった。
【0032】
実施例2
調温調湿性繊維積層体の作製:
ニードルパンチされたポリエステルスパンボンド不織布(繊度2.2dtex、厚さ1.7mm、目付130g/m2)(下層)に、平均粒子径50μmの架橋アクリル系微粒子(日本エクスラン工業社製HU100P、20℃、65%RH環境下の吸湿率40%)と融点106℃平均粒径10μmのエチレン-アクリル共重合体パウダーの混合物(85/15質量比)300g/m2をパウダー塗布機で塗布した後、更に上からポリプロピレンSMS不織布(スパンボンド(繊度2.2dtex、目付30g/m2)/メルトブロー不織布(繊度0.2dtex、目付20g/m2)/スパンボンド(繊度2.2dtex、目付20g/m2))(上層)を積層し、150℃でラミネート加工機を用いて接着積層を行い、見掛け厚さ2.6mm、目付500g/m2の調温調湿積層体を得た。得られた積層体の周囲を変性オレフィン系樹脂(融点110℃)を用いて巾2mm、厚さ2mmの樹脂シールを行なった。シール後、実施例1と同様に屈曲試験行なった結果、積層体表面からの微粒子の飛散は確認されなかった。
【0033】
実施例3
調温調湿性繊維積層体の作製:
実施例3において、上層にフィルムラミネートしたスパンボンド不織布(カレンダーロール処理されたポリエステルスパンボンド(繊度2.2dtex、目付50g/m2)に透湿性ポリエステルエラストマーフィルム(30μm)をラミネート積層したもの)を使用する以外は実施例3と同様にして、見掛け厚さ2.6mm、目付510g/m2の調温調湿積層体を得た。得られた積層体の周囲を変性オレフィン系樹脂(融点110℃)を用いて巾2mm 厚さ2mmの樹脂シールを行なった。シール後、屈曲試験行なった結果、積層体表面からの微粒子の飛散は確認されなかった。
【0034】
比較例1
フェルト不織布の作製:
ポリエステル短繊維(東洋紡績社製、20℃65%RH環境下の吸湿率は0.4%、繊度2.4dtex、繊維長38mm)100質量%からなるステープルを用いて、ニードルパンチ法によって目付500g/m2、厚さ15mmのフェルト不織布を作製した。
【0035】
表1は、実施例及び比較例の結果をまとめたものである。
【表1】
【0036】
【発明の効果】
本発明の調温調湿性のある繊維積層体によれば、ヘルメットの分野において、より快適性を高めるための部材として使用することができる。[0001]
[Technical field to which the invention belongs]
The present invention is a fiber laminate for helmets that can be used to give comfort to humans, and exhibits hygroscopicity and anti-condensation in a high humidity environment, and gives a cool feeling in a high temperature environment. In a low temperature environment, the present invention relates to a helmet fiber laminate that can exhibit the effect of improving comfort, such as heat retention by moisture absorption heat generation.
[0002]
[Prior art]
Conventionally, various methods have been used to reduce the feeling of stuffiness inside the helmet, but there is no satisfactory method. In a multilayer structure fabric, a method of forming a hydrophilic layer in a non-contact layer portion, absorbing sweat and moisture, and reducing the feeling of swell (Patent Documents 1 and 2, etc.) is excellent in hygroscopicity, Inferior. In addition, the method of mounting a cooling device including a bag containing a polymer or the like or a vent pipe (eg, Patent Document 3) has a drawback that the structure of the helmet becomes complicated.
[0003]
[Patent Document 1]
JP 2001-248010 A (Claim 1 etc.)
[Patent Document 2]
JP 09-137380 A (Claim 1 etc.)
[Patent Document 3]
JP 2000-24100 A (Claim 1 etc.)
[0004]
[Problems to be solved by the invention]
The present invention seeks to provide a fiber laminate as a helmet member for solving the above-described problems in the prior art, reducing the sensation in the head, and enhancing wearing comfort.
[0005]
[Means for Solving the Problems]
The present invention employs the following configuration. That is,
1. A laminate comprising a breathable sheet (A), an intermediate layer containing highly hygroscopic fine particles and a binder resin, and a breathable sheet (B) and / or a non-breathable sheet (C), The fiber laminate for helmets, wherein the content of the highly hygroscopic fine particles is 40 to 3000 g / m 2 .
2. A laminate comprising a breathable sheet (A), an intermediate layer containing fine moisture-absorbing / releasing fine particles and a binder resin, and a breathable sheet (B) and a fiber structure layer (D). A helmet fiber laminate, wherein the moisture-absorbing / releasing fine particles content is 40 to 3000 g / m 2 .
3. The above 1 or 2 characterized in that the binder resin of the intermediate layer is a powder type thermal adhesive, and the mass ratio of the highly hygroscopic fine particles / powder type thermal adhesive is 60/40 to 95/5. Fiber laminate for helmets as described in 2.
4). 4. The fiber laminate for helmets according to any one of 1 to 3 above, wherein the particle size of the powder type heat-adhesive adhesive is smaller than the particle size of the highly hygroscopic fine particles.
[0006]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail.
The breathable sheets (A) and (B) in the present invention are a spunbond nonwoven fabric, a needle punched felt nonwoven fabric, a chemical bond nonwoven fabric, a thermal bond nonwoven fabric, a spunlace nonwoven fabric, a melt blown nonwoven fabric, and a laminate thereof (e.g., SMS). ), Continuous linear solid network, circular knitting such as single knit and double knit, warp knitting such as tricot, raschel and double raschel, or fiber structure such as woven fabric.
[0007]
The breathable sheets (A) and (B) are made of polyester, polyamide, polyacrylonitrile, polyethylene, polypropylene, polybutylene terephthalate, polytetramethylene terephthalate, polyurethane, polyphenylene sulfide, etc. Synthetic fibers, chemical fibers such as rayon, acetate, etc., natural fibers such as cotton, hemp, silk, wool, feathers or mixed materials can be used, and the breathable sheets (A) and (B) are the same or different However, the air-permeable sheet (A) used as the particle support for forming the intermediate layer has a shape and thickness that are easy to fix and securely hold the highly hygroscopic fine particles and the binder resin. preferable. In this sense, a non-woven fabric of long fibers or short fibers provided with irregularities is preferable.
As means for forming the unevenness, there are needle punching, pleating, air through processing with a large thickness, etc., but needle punching is preferable.
[0008]
The thickness and basis weight of the breathable sheet in the present invention vary depending on the application and material, but can be appropriately changed within a range of about 2 to 30 mm. For example, in the case of an automobile seat, the thickness is preferably 2 mm to 15 mm, and the basis weight is preferably in the range of 100 g / m 2 to 900 g / m 2 .
[0009]
The intermediate layer of the laminate of the present invention contains highly hygroscopic fine particles and a binder resin. Highly hygroscopic fine particles are not particularly limited in terms of chemical structure as long as they are highly hygroscopic and finely hygroscopic, for example, inorganic such as hygroscopic silica, or polyurethane, Various organic fine particles such as polyamide-based, polyester-based and polyacrylate-based materials can be used, but organic fine particles are preferable. Examples of this are vinyl polymers such as polystyrene, polyacrylonitrile, polyacrylate, polymethacrylate, sulfonic acid groups, carboxylic acid groups, phosphoric acid groups, or metal salts thereof. Examples thereof include polymer fine particles having at least one hydrophilic group and crosslinked with either divinylbenzene, triallyl isocyanate, or hydrazine.
[0010]
The moisture absorption rate (20 ° C., 65% RH) of the highly hygroscopic fine particles is preferably 18% or more, more preferably 25% or more, and further preferably 40% or more.
[0011]
Among the highly hygroscopic organic fine particles, particularly preferred are those in which a crosslink is introduced into acrylonitrile-based polymer fine particles mainly composed of acrylonitrile by hydrazine treatment, and the nitrogen content is 0.9 to 8.1% by mass, preferably Is adjusted in the range of 2.9 to 8.1% by mass, and is hydrolyzed to 1.0 to 5.0 meq / g, preferably 2.6 to 5.0 meq / g of the amount of nitrile group remaining. 1 to 2 or more kinds of metal salts selected from Mg, Ca, Cu, Zn, Al, Ag and Fe after introducing a carboxyl group into g and then 50 to 90 mol%, preferably 60 to 85 mol% of the existing carboxyl group It is a type. In addition, metals other than these can also be used in the range which does not impair a humidity control function. However, the content is 5 mol% or less as the amount of carboxyl groups.
[0012]
As the particle size of the highly hygroscopic fine particles, those having an average particle size of about 0.01 to 200 μm can be used, but in terms of humidity control, the finer one is preferable, but the workability and mixing with the binder resin are preferred. From the viewpoint of properties, it is preferable that the apparent particle size is as large as possible. The primary average particle diameter is preferably less than 3 μm.
[0013]
Next, the binder resin that forms the intermediate layer together with the highly hygroscopic fine particles is preferable because the powder-type heat-adhesive adhesive can be uniformly mixed with the high hygroscopic fine particles. The particle diameter of the powder-type heat-adhesive adhesive is preferably smaller than that of the superabsorbent and hygroscopic fine particles. If the particle size of the powder-type heat-adhesive adhesive is large, there is a tendency that after adhesion processing, the amount of unadsorbed highly hygroscopic fine particles increases and the problem of particle scattering tends to occur. The particle size of the powder type heat-adhesive adhesive is more preferably 1/5 or less of the highly hygroscopic fine particles.
[0014]
Types of adhesive resin include polyethylene, ethylene vinyl alcohol, polyvinyl alcohol, silicon, urethane, acrylic, polyester, polyamide, polyethylene oxide, polyolefin, ethylene-acrylic copolymer, etc. Resins such as two-component and three-component copolymers are listed, and there is no particular limitation as long as there is no problem with compatibility with hygroscopic fine particles and thermal adhesiveness, but the hydrophilic resin does not inhibit the effect of the high hygroscopic fine particles. This is preferable. In this sense, the moisture absorption rate is preferably 3 to 50%.
[0015]
As the hydrophilic resin, as hydrophilic segments, polyalkylene oxide addition polymers, polar hydrophilic groups such as sulfonates and carboxylates, hydrophilic silicone resins introduced with amide-modified groups, hydrophilic urethane resins, Examples of the hydrophilic polyamide-based resin and hydrophilic polyethylene oxide-based resin include those having high hygroscopicity and moisture permeability of the resin itself.
[0016]
The mass ratio of the highly hygroscopic fine particles / powder type heat-adhesive adhesive in the intermediate layer is preferably 60/40 to 95/5. When the content of the highly hygroscopic fine particles exceeds 95% by mass, the high hygroscopic fine particles are not sufficiently fixed, and when the content is less than 60% by mass, the effect of the present invention tends to be hardly obtained.
[0017]
The content of the highly hygroscopic fine particles in the intermediate layer is 40 to 3000 g / m 2 . When the content of the highly hygroscopic fine particles exceeds 3000 g / m 2 , the high hygroscopic fine particles are not sufficiently fixed, and when the content is less than 40 g / m 2 , the effect of the present invention is hardly obtained. The content of the highly hygroscopic fine particles can be appropriately selected according to the purpose, but is preferably 100 to 1000 g / m 2 , more preferably 150 to 600 g / m 2 from the viewpoint of ease of production and production cost. m 2 , more preferably 200 to 500 g / m 2 . Further, in the intermediate layer, functional particles such as other hygroscopic particles, activated carbon powder, ceramic particles, silica particles, antibacterial agents, and deodorants can be contained depending on the purpose.
[0018]
The basis weight of the laminate comprising the breathable sheets (A) and (B) and the intermediate layer of the present invention varies depending on the use, but is usually preferably 200 to 3500 g / m 2 and a thickness of 1.0 to 50 mm. From the viewpoint of handling and ease of production, the basis weight is preferably 400 to 2000 g / m 2 and the thickness is 1.5 to 30 mm, and more preferably the basis weight is 500 to 1000 g / m 2 and the thickness is 2 to 10 mm. .
[0019]
The laminate of the present invention forms a bonded surface on one breathable sheet by applying highly hygroscopic fine particles and a heat-adhesive resin binder, and at the same time, forms another bonded sheet on the bonded surface. A method in which a breathable sheet is stacked and thermally bonded is suitably employed. More specifically, the highly hygroscopic fine particles and the powder type heat-adhesive adhesive are mixed at a mass ratio of 60/40 to 95/5, and the mixture is formed on the breathable sheet (A) provided with irregularities. Applying, and then overlaying the breathable sheet (B) or non-breathable sheet (C) on the coated surface, and heat-treating at a temperature equal to or higher than the melting point of the powder type heat-adhesive adhesive. Can be manufactured by. As a method of applying the mixture of the highly hygroscopic fine particles and the powder type heat-adhesive adhesive on the breathable sheet, a heat laminating method is preferable.
[0020]
The breathable sheet in the laminate of the present invention serves not only as an intermediate layer retaining and protecting layer that exhibits high moisture absorption and high moisture releasing properties, but also as a moisture-introducing or releasing layer. Is. Accordingly, when the intermediate layer introduces moisture containing moisture and absorbs moisture, heat generation due to moisture absorption can be expressed. Conversely, when the intermediate layer releases moisture, heat absorption and cooling due to moisture release can be expressed.
[0021]
In the laminate of the present invention, the non-breathable sheet (C) can be laminated to the intermediate layer via the breathable sheet (B) or directly. The method of lamination is not particularly limited, and a known adhesion method can be employed as needed and necessary, and may be an adhesion method such as partial adhesion, full-surface adhesion, temporary adhesion, and hook-and-loop fastener, or overlapping. For example, if the non-breathable sheet (C) side of this laminate is used on the opposite side of the human body, moisture generated from the human body will be absorbed by the intermediate layer because there is no escape area, and moisture absorption exothermicity. Can be increased, and heat retention is improved.
[0022]
As the non-breathable sheet (C), a film, a sheet or a laminate of a film and a nonwoven fabric can be used. As the film and sheet, those made of a known synthetic resin can be used, and those having waterproofness, moisture permeability, weather resistance and the like can be appropriately used depending on the application.
[0023]
Moreover, in the laminated body of this invention, when both sides of an intermediate | middle layer become a breathable sheet, a fiber structure layer (D) is further laminated | stacked. The fiber structure layer (D) may be a fiber similar to the fiber constituting the breathable sheet (A) or (B), and is a knitted fabric, a woven fabric, a three-dimensional network, a hard cushion material, or the like. . Although the fabric weight and thickness of a fiber structure layer (D) can be suitably selected according to a use or an objective, 40-1000 g / m < 2 > and a thickness of 0.1-50 mm are suitable normally.
[0024]
The method for laminating the fiber structure layer (D) is not particularly limited, and a known adhesion method can be appropriately adopted as the application and need. Adhesion methods such as partial adhesion, full-face adhesion, temporary adhesion, and hook-and-loop fastener, or just overlapping may be used. For example, when the fiber structure layer (D) side of this laminate is used to be opposite to the human body, moisture generated from the human body may be released through the intermediate layer and the fiber structure layer (D). And a cool feeling can be obtained by the endothermic and cooling effects associated with the release of moisture from the intermediate layer.
[0025]
When the moisture- and temperature-controllable fiber laminate of the present invention is used as a helmet, it is possible to provide a helmet having excellent comfort without feeling tingling and sweating.
[0026]
The laminate of the present invention can absorb and release a large amount of moisture per unit area. For example, high absorbing moisture absorption of moisture particles (20 ℃, RH 65%) when the inclusion of 40% high moisture absorptive and desorptive fine particles per 2500g of 1 m 2 in the intermediate layer, 20 ° C., standard condition of RH 65% However, it can absorb as much as 1 kg / m 2 of moisture. At higher temperature and humidity, more water can be absorbed and released. Therefore, it is also useful as a sheet-like dehumidifying material, drying material, humidity control material, and temperature control material.
[0027]
【Example】
Examples of the present invention will be specifically described below, but the present invention is not limited to these examples.
[0028]
Wear test (evaluation of feeling of swelling):
While wearing the created helmet, 10 subjects wore a 65% cotton / 35% polyester knit shirt and 100% cotton trousers, and a treadmill (approximately 130 kcal) at 25 ° C. and 50% RH. Equivalent) and subjective evaluation was performed 10 minutes after the exercise.
○ ・ ・ ・ Slight reaping △ ・ ・ ・ Slightly steaming ・ ・ ・
Powder leakage test from the surface of the laminate:
Flex test: MIT test machine (flex test machine) JIS P8115.
The sample was stopped with a four-way heat seal and subjected to a bending test.
250g load 135 ° 175 times / min., 1000 times ○ ・ ・ ・ Almost no leakage △ ・ ・ ・ Slightly leaks × ・ ・ ・ Remarkably leaks 【0030】
Method for creating helmet A commercially available helmet (manufactured by ABS resin, for flying objects and electricity, manufactured by Toyo Corporation) was prepared, and a 14 cm × 14 cm temperature-controlled and humidity-controlled laminate was mounted inside the helmet.
[0031]
Example 1
Preparation of temperature-controlled and humidity-controlling fiber laminate:
Polyester spunbonded non-woven fabric (fineness 2.2 dtex, thickness 1.7 mm, basis weight 130 g / m 2 ) (lower layer), cross-linked acrylic fine particles having an average particle size of 50 μm (HU100P, 20 manufactured by Nippon Exlan Industries Co., Ltd.) The mixture (85/15 mass ratio) of an ethylene-acrylic copolymer powder having an average particle size of 10 μm and a melting point of 106 ° C. so that the applied amount is 200 g / m 2. After coating with a powder coating machine, the same non-woven fabric as the lower layer is laminated from above, and adhesive lamination is carried out at 150 ° C. using a laminating machine to control the temperature to an apparent thickness of 3 mm and a basis weight of 460 g / m 2. A wet laminate was obtained. The periphery of the obtained laminate was sealed with a resin having a width of 2 mm and a thickness of 2 mm using a modified olefin resin (melting point: 110 ° C.). Subsequently, when the temperature-controlled and humidity-controlled laminate was subjected to a bending test, no scattering of fine particles from the surface of the laminate was confirmed.
[0032]
Example 2
Preparation of temperature-controlled and humidity-controlling fiber laminate:
Cross-linked acrylic fine particles (HU100P manufactured by Nippon Exlan Industry Co., Ltd., 20 ° C.) having an average particle size of 50 μm on a needle-punched polyester spunbonded nonwoven fabric (fineness: 2.2 dtex, thickness: 1.7 mm, basis weight: 130 g / m 2 ) (lower layer) After applying 300 g / m 2 of a mixture (85/15 mass ratio) of an ethylene-acrylic copolymer powder having a moisture absorption rate of 40% under an environment of 65% RH and a melting point of 106 ° C. and an average particle size of 10 μm with a powder coating machine, Further, polypropylene SMS nonwoven fabric (spunbond (fineness: 2.2 dtex, basis weight 30 g / m 2 ) / melt blown nonwoven fabric (fineness: 0.2 dtex, basis weight 20 g / m 2 ) / spunbond (fineness: 2.2 dtex, basis weight 20 g / m 2) )) (Upper layer) is laminated, and adhesion lamination is performed using a laminating machine at 150 ° C., and the apparent thickness is 2.6 mm. A temperature-controlled and humidity-adjusted laminate having a basis weight of 500 g / m 2 was obtained. A resin seal having a width of 2 mm and a thickness of 2 mm was performed around the obtained laminate using a modified olefin resin (melting point: 110 ° C.). After sealing, as a result of conducting a bending test in the same manner as in Example 1, scattering of fine particles from the surface of the laminate was not confirmed.
[0033]
Example 3
Preparation of temperature-controlled and humidity-controlling fiber laminate:
In Example 3, a spunbonded nonwoven fabric (a laminate of a calendered polyester spunbond (fineness of 2.2 dtex, basis weight of 50 g / m 2 ) laminated with a moisture-permeable polyester elastomer film (30 μm)) was laminated on the upper layer in Example 3. A temperature-controlled and humidity-adjusted laminate having an apparent thickness of 2.6 mm and a basis weight of 510 g / m 2 was obtained in the same manner as in Example 3 except that it was used. The periphery of the obtained laminate was sealed with a resin having a width of 2 mm and a thickness of 2 mm using a modified olefin resin (melting point: 110 ° C.). As a result of conducting a bending test after sealing, scattering of fine particles from the surface of the laminate was not confirmed.
[0034]
Comparative Example 1
Fabrication of felt nonwoven fabric:
Using staples made of 100% by mass of polyester short fibers (Toyobo Co., Ltd., moisture absorption rate of 0.4%, fineness of 2.4 dtex, fiber length of 38 mm at 20 ° C. and 65% RH), the basis weight is 500 g by a needle punch method. A felted nonwoven fabric having a thickness of 15 mm / m 2 was prepared.
[0035]
Table 1 summarizes the results of the examples and comparative examples.
[Table 1]
[0036]
【The invention's effect】
According to the fiber laminate with temperature and humidity control of the present invention, it can be used as a member for enhancing comfort in the field of helmets.
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002365486A JP4232084B2 (en) | 2002-12-17 | 2002-12-17 | Fiber laminate for helmet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002365486A JP4232084B2 (en) | 2002-12-17 | 2002-12-17 | Fiber laminate for helmet |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2004197251A JP2004197251A (en) | 2004-07-15 |
| JP4232084B2 true JP4232084B2 (en) | 2009-03-04 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2002365486A Expired - Fee Related JP4232084B2 (en) | 2002-12-17 | 2002-12-17 | Fiber laminate for helmet |
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| Country | Link |
|---|---|
| JP (1) | JP4232084B2 (en) |
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| Publication number | Publication date |
|---|---|
| JP2004197251A (en) | 2004-07-15 |
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