JP4307272B2 - Solid cotton for automobile interior materials and interior materials - Google Patents
Solid cotton for automobile interior materials and interior materials Download PDFInfo
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- JP4307272B2 JP4307272B2 JP2004008108A JP2004008108A JP4307272B2 JP 4307272 B2 JP4307272 B2 JP 4307272B2 JP 2004008108 A JP2004008108 A JP 2004008108A JP 2004008108 A JP2004008108 A JP 2004008108A JP 4307272 B2 JP4307272 B2 JP 4307272B2
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- 239000000463 material Substances 0.000 title claims description 47
- 229920000742 Cotton Polymers 0.000 title claims description 37
- 239000007787 solid Substances 0.000 title claims description 35
- 239000000835 fiber Substances 0.000 claims description 53
- 239000011230 binding agent Substances 0.000 claims description 42
- 229920000728 polyester Polymers 0.000 claims description 36
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- 238000002844 melting Methods 0.000 claims description 15
- 230000008018 melting Effects 0.000 claims description 15
- WERYXYBDKMZEQL-UHFFFAOYSA-N butane-1,4-diol Chemical compound OCCCCO WERYXYBDKMZEQL-UHFFFAOYSA-N 0.000 claims description 12
- 229920001634 Copolyester Polymers 0.000 claims description 9
- 239000000470 constituent Substances 0.000 claims description 9
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- 230000004927 fusion Effects 0.000 claims description 8
- KKEYFWRCBNTPAC-UHFFFAOYSA-N Terephthalic acid Chemical compound OC(=O)C1=CC=C(C(O)=O)C=C1 KKEYFWRCBNTPAC-UHFFFAOYSA-N 0.000 claims description 6
- 239000013078 crystal Substances 0.000 claims description 6
- 150000002009 diols Chemical class 0.000 claims description 6
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- 238000005452 bending Methods 0.000 description 10
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- 229920000642 polymer Polymers 0.000 description 4
- MTHSVFCYNBDYFN-UHFFFAOYSA-N diethylene glycol Chemical compound OCCOCCO MTHSVFCYNBDYFN-UHFFFAOYSA-N 0.000 description 3
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- MMINFSMURORWKH-UHFFFAOYSA-N 3,6-dioxabicyclo[6.2.2]dodeca-1(10),8,11-triene-2,7-dione Chemical group O=C1OCCOC(=O)C2=CC=C1C=C2 MMINFSMURORWKH-UHFFFAOYSA-N 0.000 description 2
- WSQZNZLOZXSBHA-UHFFFAOYSA-N 3,8-dioxabicyclo[8.2.2]tetradeca-1(12),10,13-triene-2,9-dione Chemical group O=C1OCCCCOC(=O)C2=CC=C1C=C2 WSQZNZLOZXSBHA-UHFFFAOYSA-N 0.000 description 2
- 238000007334 copolymerization reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- WOZVHXUHUFLZGK-UHFFFAOYSA-N dimethyl terephthalate Chemical compound COC(=O)C1=CC=C(C(=O)OC)C=C1 WOZVHXUHUFLZGK-UHFFFAOYSA-N 0.000 description 2
- 238000009408 flooring Methods 0.000 description 2
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- QQVIHTHCMHWDBS-UHFFFAOYSA-N isophthalic acid Chemical compound OC(=O)C1=CC=CC(C(O)=O)=C1 QQVIHTHCMHWDBS-UHFFFAOYSA-N 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
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- 229920001296 polysiloxane Polymers 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- CARJPEPCULYFFP-UHFFFAOYSA-N 5-Sulfo-1,3-benzenedicarboxylic acid Chemical compound OC(=O)C1=CC(C(O)=O)=CC(S(O)(=O)=O)=C1 CARJPEPCULYFFP-UHFFFAOYSA-N 0.000 description 1
- 229920002972 Acrylic fiber Polymers 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
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- BXKDSDJJOVIHMX-UHFFFAOYSA-N edrophonium chloride Chemical compound [Cl-].CC[N+](C)(C)C1=CC=CC(O)=C1 BXKDSDJJOVIHMX-UHFFFAOYSA-N 0.000 description 1
- UHPJWJRERDJHOJ-UHFFFAOYSA-N ethene;naphthalene-1-carboxylic acid Chemical group C=C.C1=CC=C2C(C(=O)O)=CC=CC2=C1 UHPJWJRERDJHOJ-UHFFFAOYSA-N 0.000 description 1
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- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 1
- 239000005011 phenolic resin Substances 0.000 description 1
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- PAPBSGBWRJIAAV-UHFFFAOYSA-N ε-Caprolactone Chemical compound O=C1CCCCCO1 PAPBSGBWRJIAAV-UHFFFAOYSA-N 0.000 description 1
Images
Description
本発明は、自動車の内装基材用固綿および内装基材に関するものである。更に詳しくは、自動車内の天井材、ドアパネル、クォーターパネル、ダッシュボード、床材、あるいはトランクルーム等に内装基材に用いられる耐熱性に優れた固綿およびこの固綿を成形してなる内装基材に関するものである。 The present invention relates to solid cotton for an interior substrate of an automobile and an interior substrate. More specifically, heat-resistant solid cotton used as an interior base material for ceiling materials, door panels, quarter panels, dashboards, flooring materials, or trunk rooms in automobiles, and interior base materials formed by molding this solid cotton. It is about.
従来、自動車の内装基材のひとつである自動車用天井材としては、一般に成形天井というものが多用されている。成形天井とは、織編物や薄い不織布からなる表皮材と内装基材を一体化したものであり、天井の固定台座に嵌め込んで使用される。内装基材としては、ガラス繊維で強化した発泡ウレタン、木材チップあるいは段ボールにフェノール樹脂のような熱硬化性樹脂を含浸したもの等が使用されている。さらに近年、自動車の内装基材において、軽量化や吸音性、遮音性、断熱性等の要求性能が高くなり、それらの性能を向上させるために、上述の基材に代えて、主体繊維をバインダー繊維等で熱接着させた固綿を用いることが提案されている。（特許文献１、２）
しかし、夏場の直射日光下等においては、車内温度が８０℃を超える高温雰囲気下となるため、従来提案されている固綿を使用した内装基材は変形し易く、例えば、天井材の場合は、自重に耐えられずに垂れ下がる現象が起きることがある。
Conventionally, as an automobile ceiling material which is one of interior materials for automobiles, a molded ceiling is generally used. The molded ceiling is an integrated skin material made of woven or knitted fabric or thin nonwoven fabric and an interior base material, and is used by being fitted into a fixed base of the ceiling. As the interior base material, foamed urethane reinforced with glass fibers, wood chips or cardboard impregnated with a thermosetting resin such as a phenol resin are used. Furthermore, in recent years, in automobile interior base materials, required performances such as weight reduction, sound absorption, sound insulation, heat insulation and the like have been increased, and in order to improve those performances, the main fibers are replaced with binders instead of the above base materials. It has been proposed to use solid cotton heat-bonded with fibers or the like. (Patent Documents 1 and 2)
However, under direct sunlight in the summer, etc., the interior temperature of the vehicle interior using a solid cotton, which has been conventionally proposed, is easily deformed because the interior temperature of the vehicle exceeds 80 ° C. For example, in the case of a ceiling material In some cases, the body may sag without being able to withstand its own weight.
上記問題を解決するものとして、例えば、特許文献３には、偏平断面を有する主体繊維を用い、また、エチレンテレフタレート単位とブチレンテレフタレート単位とからなるアルキレンテレフタレートとε−カプロラクトンとからなるランダム共重合ポリエステルをバインダー成分としたポリエステル系バインダー繊維を用いることによって固綿の剛性、耐熱変形性を向上させることが提案されている。
上記した特許文献３の固綿は、８０℃前後の高温雰囲気下における耐熱性を評価しているが、本発明では、さらに高温雰囲気下で使用した場合であっても熱変形が生じにくく、天井材、ドアパネル、クォーターパネル、ダッシュボード、床材、あるいはトランクルーム等の自動車の内装材に用いるのに好適な固綿および自動車の内装基材を提供することを目的とするものである。 The above-described solid cotton of Patent Document 3 has been evaluated for heat resistance in a high temperature atmosphere of about 80 ° C. However, in the present invention, even when used in a high temperature atmosphere, thermal deformation hardly occurs, and the ceiling It is an object of the present invention to provide solid cotton suitable for use in automobile interior materials such as materials, door panels, quarter panels, dashboards, floor materials, and trunk rooms, and automobile interior base materials.
本発明者は、上記課題を解決すべく鋭意検討を重ねた結果、本発明に到達した。 The inventor of the present invention has reached the present invention as a result of intensive studies to solve the above problems.
すなわち、本発明は、主体繊維とポリエステル系バインダー繊維とからなり、構成繊維同士の交点が、該ポリエステル系バインダー繊維のバインダー成分によって熱接着されてなる固綿であって、該ポリエステル系バインダー繊維は、鞘部にバインダー成分が配された芯鞘型複合形態であって、バインダー成分が、テレフタル酸のみを酸成分とし、エチレングリコールと１，４−ブタンジオールのみをジオール成分とした共重合ポリエステルであり、ジオール成分におけるエチレングリコールと１，４−ブタンジオールとはモル比７５／２５〜１０／９０の範囲で共重合したものであり、共重合ポリエステルの結晶融点が１８０〜２１０℃、共重合ポリエステルの融解熱が１６Ｊ／ｇ以上であることを特徴とする自動車の内装基材用固綿を要旨とするものである。
That is, the present invention is a solid cotton comprising a main fiber and a polyester-based binder fiber, and the intersection of the constituent fibers is thermally bonded by the binder component of the polyester-based binder fiber, and the polyester-based binder fiber is , a core-sheath composite form the binder component was arranged in the sheath portion, the binder component is a terephthalic acid only as the acid component, only ethylene glycol and 1,4-butanediol in copolyester was diol component Ah is, the ethylene glycol and 1,4-butanediol in the diol component is obtained by copolymerization in the range of molar ratio 75 / 25-10 / 90, crystalline melting point of the copolymerized polyester is 180-210 ° C., copolymerization main solid cotton interior base material of an automobile, wherein the heat of fusion of the polyester is 16J / g or more It is an.
また、本発明は、前記の内装基材用固綿が所定の形状に成形されていることを特徴とする自動車の内装基材を要旨とするものである。 In addition, the gist of the present invention is an automobile interior base material characterized in that the above-described solid cotton for interior base material is molded into a predetermined shape.
本発明の内装基材用固綿は、特定の成分からなる共重合ポリエステルをバインダー成分として用いた芯鞘型複合形態のポリエステル系バインダー繊維を使用しており、この共重合ポリエステルは、結晶融点が高く、結晶性が高くて融解熱が大きいため、高温雰囲気下での荷重に対しへたりにくく変形にくい。したがって、この固綿を成形して、自動車用内装基材、例えば、天井材、ドアパネル、クォーターパネル、ダッシュボード、床材、あるいはトランクルーム等に用いた場合、軽量化が達成されると同時に防音性、遮音性に優れ、かつ、使用経時や高温雰囲気下においても、へたりにくく変形にくいものとなる。 The solid cotton for interior base material of the present invention uses a polyester-based binder fiber in a core-sheath-type composite form using a copolyester comprising a specific component as a binder component, and this copolyester has a crystalline melting point. High, high crystallinity and high heat of fusion, so it is difficult to be deformed and hard to deform under high temperature atmosphere. Therefore, when this solid cotton is molded and used for automobile interior base materials such as ceiling materials, door panels, quarter panels, dashboards, flooring materials, or trunk rooms, weight reduction is achieved while at the same time soundproofing. In addition, it is excellent in sound insulation, and is difficult to sag and deform even when used for a long time or in a high temperature atmosphere.
本発明の自動車の内装基材用固綿は、主体繊維とポリエステル系バインダー繊維とからなり、構成繊維同士は、該ポリエステル系バインダー繊維のバインダー成分によって熱接着されてなる固綿である。 The solid cotton for an automobile interior base material of the present invention is composed of a main fiber and a polyester binder fiber, and the constituent fibers are solid cotton thermally bonded by the binder component of the polyester binder fiber.
本発明の固綿に用いる主体繊維としては、ポリエステル繊維、ポリアミド繊維、アクリル繊維、ポリプロピレン繊維等の合成繊維を挙げることができ、ポリエステル系バインダー繊維のバインダー成分の融点よりも高融点を有するものであれば特に限定されない。中でもポリエステル繊維を用いることが好ましく、特に、エチレンテレフタレート単位やブチレンテレフタレート単位あるいはエチレンナフタレート単位（特にエチレン−２，６−ナフタレート単位）を主たる構成成分とするものが好ましく、その特性を損なわない範囲でイソフタル酸、５−スルホイソフタル酸、ジエチレングリコール等の他の成分が共重合されたポリエステルを用いてもよい。吸音性、遮音性に優れることや変形のしにくさ等の物性およびコストの点から、ポリエチレンテレフタレート繊維を好ましく用いることができる。主体繊維は、その断面形状が丸断面であっても異型断面であってもよいし中空であっても非中空でもよい。さらに、その繊度は特に限定されるものでなく、用途による要求特性により決めればよいが、３．３〜３３デシテックスのものが好ましい。繊維の捲縮形態としては、機械捲縮であっても立体捲縮であってもよく特に規定しないが、コンジュゲートタイプの立体捲縮を有するもの場合、吸音性、遮音性の良好な固綿を得ることができる。また、主体繊維には、通常の詰綿用油剤や、シリコン系あるいは非シリコン系の易滑性油剤を付与してもよい。 Examples of the main fibers used in the solid cotton of the present invention include synthetic fibers such as polyester fibers, polyamide fibers, acrylic fibers, and polypropylene fibers, which have a melting point higher than the melting point of the binder component of the polyester-based binder fibers. If there is no particular limitation. Among them, it is preferable to use polyester fiber, and in particular, an ethylene terephthalate unit, a butylene terephthalate unit, or an ethylene naphthalate unit (especially ethylene-2,6-naphthalate unit) is preferred as a main constituent, and the characteristics are not impaired. A polyester obtained by copolymerizing other components such as isophthalic acid, 5-sulfoisophthalic acid and diethylene glycol may be used. Polyethylene terephthalate fibers can be preferably used from the viewpoints of physical properties such as excellent sound absorption and sound insulation properties, resistance to deformation, and cost. The cross-sectional shape of the main fiber may be a round cross section, an irregular cross section, hollow, or non-hollow. Furthermore, the fineness is not particularly limited and may be determined according to the required characteristics depending on the application, but preferably 3.3 to 33 dtex. The crimped form of the fiber may be either a mechanical crimp or a three-dimensional crimp, and is not particularly defined. However, when the fiber has a conjugate type of three-dimensional crimp, the solid cotton having good sound absorption and sound insulation properties. Can be obtained. The main fiber may be provided with a normal cotton filling oil or a silicone-based or non-silicone easy-to-slip oil.
本発明において、構成繊維同士を熱接着するポリエステル系バインダー繊維は、鞘部にバインダー成分が配された芯鞘型複合形態である。芯鞘型複合形態であると、バインダー繊維の表面がバインダー成分により覆われてなるため、構成繊維同士の接着強力が向上し、剛性に優れ、高温雰囲気下における形態保持性に優れた固綿を得ることができる。芯部に配される重合体としては、バインダー成分よりも融点の高いポリエステル系重合体を配すればよく、ポリエチレンテレフタレートであることが好ましい。 In the present invention, the polyester-based binder fiber for thermally bonding the constituent fibers is a core-sheath composite form in which a binder component is disposed in the sheath portion. In the core-sheath type composite form, the surface of the binder fiber is covered with a binder component, so that the adhesive strength between constituent fibers is improved, the rigidity is excellent, and the solid cotton excellent in form retention in a high-temperature atmosphere is provided. Obtainable. As the polymer disposed in the core portion, a polyester polymer having a melting point higher than that of the binder component may be disposed, and polyethylene terephthalate is preferable.
ポリエステル系バインダー繊維におけるバインダー成分は、テレフタル酸を酸成分とし、エチレングリコールと１，４−ブタンジオールをジオール成分とした共重合ポリエステルである。エチレングリコールと１，４−ブタンジオールのモル比を７５／２５〜１０／９０の範囲として共重合され、この範囲に共重合することによって共重合ポリエステルの結晶融点を１８０〜２１０℃とすることができる。結晶融点が１８０℃未満であると、高温雰囲気下で使用したときに接着強度が低下し、変形が生じやすく、例えば、自動車の天井材として使用した場合は、自重に耐えられずに垂れ下がりが生じる傾向となる。一方、２１０℃を超えると、熱接着処理の際の設定温度をより高温に設定しなければならず、主体繊維までが熱の影響を受けて、主体繊維の物性や形状を損ねる傾向となる。 The binder component in the polyester binder fiber is a copolyester having terephthalic acid as an acid component and ethylene glycol and 1,4-butanediol as a diol component. The molar ratio of ethylene glycol and 1,4-butanediol is copolymerized in the range of 75/25 to 10/90, and the crystal melting point of the copolymerized polyester may be 180 to 210 ° C. by copolymerizing in this range. it can. When the crystal melting point is less than 180 ° C., the adhesive strength is lowered when used in a high temperature atmosphere, and deformation is likely to occur. For example, when used as a ceiling material of an automobile, it sags without being able to withstand its own weight. It becomes a trend. On the other hand, when the temperature exceeds 210 ° C., the set temperature in the heat bonding process has to be set higher, and even the main fibers tend to be affected by heat, and the physical properties and shape of the main fibers tend to be impaired.
バインダー成分である共重合ポリエステルの融解熱は、１６Ｊ／ｇ以上である。融解熱が１６Ｊ／ｇ以上であると、熱接着処理において、溶融軟化して構成繊維同士を接着した後、降温する際に共重合ポリエステルが速やかに結晶化し、また、十分に配向、結晶化するため、再度昇温しても共重合ポリエステルの融点付近の温度までは接着強度が低下することなく、高温下でも優れた接着強度を示し、形態安定性に優れた固綿および内装基材を得ることができる。
The heat of fusion of the copolymerized polyester as the binder component is 16 J / g or more . When the heat of fusion is 16 J / g or more, the copolyester quickly crystallizes and cools sufficiently when the temperature is lowered after melting and softening and bonding the constituent fibers to each other in the thermal bonding process. Therefore, even if the temperature is raised again, the adhesive strength does not decrease up to a temperature near the melting point of the copolyester, and excellent adhesive strength is exhibited even at high temperatures, and solid cotton and interior base materials having excellent form stability are obtained. be able to.
ポリエステル系バインダー繊維の繊度は特に限定するものではないが、１．１〜３３デシテックスであるのが好ましい。 The fineness of the polyester binder fiber is not particularly limited, but is preferably 1.1 to 33 dtex.
本発明の内装基材用固綿において、上記した主体繊維とポリエステル系バインダー繊維の混合割合は、用途による要求特性に応じて適宜選択すればよいが、２０〜８０／８０〜２０質量％の範囲とすることが好ましい。 In the solid cotton for an interior base material of the present invention, the mixing ratio of the main fiber and the polyester binder fiber may be appropriately selected according to the required characteristics depending on the application, but is in the range of 20 to 80/80 to 20% by mass. It is preferable that
本発明の内装基材用固綿は、製造設備、製造コスト、軽量化、使い易さ等の観点から、厚みが４〜２０mmで、密度が０．０３〜０．４ｇ／ｃｍ3であるのが好ましい。 The solid cotton for interior base material of the present invention has a thickness of 4 to 20 mm and a density of 0.03 to 0.4 g / cm 3 from the viewpoints of production equipment, production cost, weight reduction, ease of use, and the like. Is preferred.
本発明の内装基材用固綿は、例えば次の方法で製造することができる。捲縮を有し、繊維長５〜１００ｍｍ、好ましくは２０〜８０ｍｍにカットされた主体繊維とポリエステル系バインダー繊維を、用途による要求特性により決定した混合割合で混綿してカード機等でウエブを形成する。得られたウエブを熱処理装置に通して熱処理し、バインダー成分を溶融または軟化させ、構成繊維同士をその交点で熱接着して、平板状等に一体化された本発明の内装基材用固綿を得る。熱処理装置としては、熱風循環ドライヤー、熱風貫流ドライヤー、サクシヨンドラムドライヤー、ヤンキードラムドライヤー等を用いることができ、バインダー成分である共重合ポリエステルの融点に応じた処理温度と処理時間を選定して処理を行えばよい。熱処理前にニードリング加工を行い、構成繊維同士を三次元的に交絡させてもよい。 The solid cotton for interior base material of the present invention can be produced, for example, by the following method. A main body fiber having a crimp and a fiber length of 5 to 100 mm, preferably 20 to 80 mm, and a polyester-based binder fiber are blended at a mixing ratio determined by required characteristics depending on the application, and a web is formed by a card machine or the like. To do. The obtained web is heat-treated through a heat treatment apparatus, the binder component is melted or softened, the constituent fibers are thermally bonded at their intersections, and the solid cotton for interior base material of the present invention integrated into a flat plate or the like Get. As the heat treatment device, a hot air circulation dryer, a hot air once-through dryer, a succession drum dryer, a Yankee drum dryer, etc. can be used, and the treatment temperature and treatment time corresponding to the melting point of the copolymerized polyester as the binder component are selected and treated. Can be done. Needling may be performed before the heat treatment to entangle the constituent fibers three-dimensionally.
本発明の自動車の内装基材は、上記の方法により得られた平板状の固綿を予熱し、所定の形状にホットプレスあるいはコールドプレスすることによって成形して得ることができる。成形型枠は、自動車の内装部に応じた型枠を用いればよい。また、部材によっては、内装基材の表面に意匠性に優れた織編物等の薄地の布帛を表面材として貼付けたり、通気止めとしてスパンボンド不織布やフィルム等を裏面材として積層してもよい。 The automobile interior base material of the present invention can be obtained by preheating the flat solid cotton obtained by the above method and molding it by hot pressing or cold pressing into a predetermined shape. What is necessary is just to use the mold according to the interior part of a motor vehicle as a shaping | molding mold. Further, depending on the member, a thin fabric such as a woven or knitted fabric having excellent design properties may be attached to the surface of the interior base material as a surface material, or a spunbonded nonwoven fabric or a film may be laminated as a back surface material to prevent ventilation.
本発明の内装基材の厚みは２〜１０ｍｍであることが好ましい。また、内装基材の部位に応じて厚みを変化させてもよい。厚みが２ｍｍ未満では、剛性、吸音性、遮音性が保持できない場合がある。厚みが１０ｍｍを超えると、車内スペースが狭くなる場合がある。 The thickness of the interior base material of the present invention is preferably 2 to 10 mm. Moreover, you may change thickness according to the site | part of an interior base material. If the thickness is less than 2 mm, rigidity, sound absorption, and sound insulation may not be maintained. If the thickness exceeds 10 mm, the space in the vehicle may become narrow.
以下、実施例によって本発明を詳しく説明するが、本発明はこれらによって限定されるものではない。なお、実施例に記述した諸物性の評価法は、次の通りである。
（１）融点（℃）
バーキンエルマー社製の示差走査熱量計ＤＳＣ−２型を使用して昇温速度２０℃／分で測定した。
EXAMPLES Hereinafter, although an Example demonstrates this invention in detail, this invention is not limited by these. In addition, the evaluation methods of various physical properties described in the examples are as follows.
(1) Melting point (° C)
A differential scanning calorimeter DSC-2 manufactured by Birkin Elmer was used to measure at a heating rate of 20 ° C./min.
（２）融解熱（Ｊ／ｇ）
バーキンエルマー社製の示差走査熱量計ＤＳＣ−２型を使用して昇温速度２０℃／分で測定した。
(2) Heat of fusion (J / g)
A differential scanning calorimeter DSC-2 manufactured by Birkin Elmer was used to measure at a heating rate of 20 ° C./min.
（３）曲げ強度（Ｎ／ｃｍ2）
オリエンテック社製のテンシロンを使用し、試験片（幅５ｃｍ×長さ２０ｃｍ）を間隔１０ｃｍの２点で支持した状態で設置して、試験片の支持間隔の中心部に試験片と同幅で厚み１．２ｃｍの先端の尖った鋼鉄板を２０ｍｍ／分の速度で下降させて端部を押しつけ、試験片が曲げられる時の応力（最大曲げ応力（Ｎ））を読みとり、次式より曲げ強度を求めた。曲げ強度は、剛性を示す値であり、値が大きいものほど、剛性が強く変形しにくい固綿である。図１に曲げ強度の測定方法の概略説明図を示す。なお、試験片は１０個用意して測定し、その平均値を曲げ強度とした。
曲げ強度（Ｎ／ｃｍ2）＝［３×（最大曲げ応力（Ｎ））×１０ｃｍ（支持間隔）］／［２×５ｃｍ（試験片の幅）×（試験片の厚み（ｃｍ））2］
(3) Bending strength (N / cm 2 )
Using Tensilon manufactured by Orientec Co., Ltd., installed with a test piece (width 5 cm x length 20 cm) supported at two points with a distance of 10 cm, the same width as the test piece at the center of the support interval of the test piece A steel plate with a sharp tip of 1.2 cm in thickness is lowered at a speed of 20 mm / min and the end is pressed, and the stress when the test piece is bent (maximum bending stress (N)) is read. Asked. The bending strength is a value indicating rigidity, and the larger the value, the stronger the rigidity and the harder the deformation. FIG. 1 shows a schematic explanatory diagram of a bending strength measurement method. In addition, ten test pieces were prepared and measured, and the average value was defined as the bending strength.
Bending strength (N / cm 2 ) = [3 × (maximum bending stress (N)) × 10 cm (support interval)] / [2 × 5 cm (test specimen width) × (test specimen thickness (cm)) 2 ]
（４）熱ヘタリ（ｍｍ）
試験片（幅５ｃｍ×長さ２５ｃｍ）の端部Ａから５ｃｍの所までを台座に固定し、もう一方の端部Ｂ側をフリーの状態にする。その後、１００℃あるいは１２０℃の２温度で２４時間、高熱雰囲気下の状態に静置した後、端部Ｂの熱処理前の位置（台座の位置に試験片の厚みを足した位置）からの垂れ下がり度合いを測定し、耐熱変形性の尺度とした。値の小さいものほど、熱により変形しにくく良好なものである。図２に耐熱変形度の測定方法の概略説明図を示す。なお、試験片については１０個用意して測定し、その平均値を熱ヘタリ（ｍｍ）とした。
(4) Heat settling (mm)
The test piece (width 5 cm × length 25 cm) is fixed to the pedestal from the end A to 5 cm, and the other end B side is in a free state. Then, after standing in a hot atmosphere for 24 hours at two temperatures of 100 ° C. or 120 ° C., the end B hangs down from the position before heat treatment (the position of the base plus the thickness of the test piece). The degree was measured and used as a measure of heat distortion resistance. Smaller values are less likely to be deformed by heat. FIG. 2 is a schematic explanatory diagram of a method for measuring the degree of heat distortion. In addition, 10 test pieces were prepared and measured, and the average value was defined as thermal sag (mm).
実施例１
表１に示した重合体組成となるように、ジメチルテレフタレートと、その１．３倍モルの表１に示したジオールとを用いて、常法のエステル交換、重縮合反応を行い、共重合ポリエステル（結晶融点１８２℃、融解熱１８．８Ｊ／ｇ）を得た。この共重合ポリエステルが鞘部、結晶融点２５５℃のポリエチレンテレフタレートが芯部に配して、鞘部と芯部との複合比が１／１（質量比）となるように、芯鞘型複合繊維用溶融紡糸装置を使用して常法の紡糸、延伸工程を経て、繊度２．２デシテックス、カット長５１ｍｍの芯鞘型ポリエステル系バインダー繊維を得た。このポリエステル系バインダー繊維と繊度１７デシテックス、カット長５１ｍｍのポリエチレンテレフタレート繊維とを５０／５０（質量％）の割合で混綿し、カードに通しウエブとし、ウエブを４ｍｍの厚みのスペーサーを挟んだ金網の間に入れて厚みを規制して、共重合ポリエステルの２０２℃に設定した熱風循環ドライヤーで５分間熱処理を行い、厚み４ｍｍ、密度０．２ｇ／ｃｍ3の実施例１の固綿を得た。
Example 1
Using the dimethyl terephthalate and 1.3 moles of the diol shown in Table 1 so as to obtain the polymer composition shown in Table 1, conventional transesterification and polycondensation reactions are carried out to obtain a copolymerized polyester. (Crystal melting point 182 ° C., heat of fusion 18.8 J / g) was obtained. A core-sheath type composite fiber in which the copolymer polyester is disposed in the sheath part, polyethylene terephthalate having a crystal melting point of 255 ° C. is disposed in the core part, and the composite ratio of the sheath part to the core part is 1/1 (mass ratio). A core-sheath type polyester binder fiber having a fineness of 2.2 dtex and a cut length of 51 mm was obtained through a conventional spinning and drawing process using a melt spinning apparatus. This polyester-based binder fiber and polyethylene terephthalate fiber having a fineness of 17 dtex and a cut length of 51 mm are blended in a ratio of 50/50 (mass%), passed through a card to form a web, and the web is made of a wire mesh with a spacer of 4 mm in thickness. The thickness was regulated in between, and heat treatment was performed for 5 minutes with a hot-air circulating dryer set at 202 ° C. of the copolyester to obtain solid cotton of Example 1 having a thickness of 4 mm and a density of 0.2 g / cm 3 .
比較例１〜４
表１に示した重合体組成となる共重合ポリエステルを用いたこと以外は、実施例１と同様にして比較例１の固綿を得た。
Comparative Examples 1-4
Solid cotton of Comparative Example 1 was obtained in the same manner as in Example 1 except that the copolyester having the polymer composition shown in Table 1 was used.
比較例５
実施例１において、ポリエステル系バインダー繊維の複合形態をサイドバイサイド型に変更したこと以外は、実施例１と同様にして比較例５の固綿を得た。
Comparative Example 5
In Example 1, solid cotton of Comparative Example 5 was obtained in the same manner as Example 1 except that the composite form of the polyester binder fiber was changed to the side-by-side type.
また、実施例１と比較例５との比較から、ポリエステル系バインダー繊維の形態が、バインダー成分が表面の全てを形成している芯鞘型であることにより、剛性に優れた固綿が得られていることが認められる。 In addition, from comparison between Example 1 and Comparative Example 5, the polyester-based binder fiber is a core-sheath type in which the binder component forms the entire surface, so that solid cotton having excellent rigidity can be obtained. It is recognized that
また、得られた実施例１の固綿を用いて、自動車の天井材に用いる内装基材を作成した。すなわち、スパンボンド不織布、実施例１の固綿、ホットメルトシート、表面材（織物）の順に積層し、天井材用型枠にてホットプレスを行い内装基材を得た。成形性は良好であった。 Moreover, the interior base material used for the ceiling material of a motor vehicle was created using the obtained solid cotton of Example 1. That is, the spunbonded nonwoven fabric, the solid cotton of Example 1, the hot melt sheet, and the surface material (woven fabric) were laminated in this order, and hot pressing was performed on the ceiling material form to obtain an interior base material. The moldability was good.
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