JP4091317B2 - Cross sheet with light transmission - Google Patents

Description

（式中、R₃は炭素原子数１〜１０のアルキル基または水素原子を表し、R₄は炭素原子数５〜１０のシクロアルキル基または炭素原子数１〜４のアルキル基で置換された炭素原子数５〜１０のシクロアルキル基を表す。）
【０００５】
【発明の実施の形態】
本発明に使用される熱可塑性樹脂としては、ポリオレフィン、ナイロン、ポリエステル等が挙げられる。ポリオレフィンとしては、具体的には、高密度ポリエチレン、中密度ポリエチレン、低密度ポリエチレン、直鎖状低密度ポリエチレン、メタロセン触媒を用いて製造されたエチレン・α−オレフィン共重合体などのポリエチレン系樹脂や、プロピレン単独重合体、エチレン−プロピレンブロック共重合体、エチレン−プロピレンランダム共重合体などのポリプロピレン系樹脂などが挙げられるが、これらのうちでは、延伸効果にすぐれた、高密度ポリエチレン、プロピレン単独重合体などが好ましい。
【０００６】
本発明に使用される難燃剤としては、下記一般式(１)で示される窒素含有化合物が用いられる。
H(R₁)Nー(CH₂)_aーN(R₂)ー(CH₂)_bーN(R_2')ー(CH₂)_cーN(R₁)H （１）
（式中、R₁は下記一般式（２）で示されるピペリジル基を含有するトリアジン誘導体基であり、R_2、R_2'は R₁または水素原子を表し、ａ，ｂ及びｃはそれぞれ、２〜５の正数を表す。）
【化４】

（式中、R₃は炭素原子数１〜１０のアルキル基または水素原子を表し、R₄は炭素原子数５〜１０のシクロアルキル基または炭素原子数１〜４のアルキル基で置換された炭素原子数５〜１０のシクロアルキル基を表す。）
【０００７】
上記一般式(１)で示される窒素含有化合物として、下記一般式(３)で示される窒素含有化合物が好ましく、特に下記一般式(３)と下記一般式(４)の組み合わせのものが好ましい。
H(R₁)Nー(CH₂)₃ーN(R₁)ー(CH₂)₂ーNHー(CH₂)₃ーN(R₁)H （３）
即ち、上記一般式(３)で示される窒素含有化合物は、上記一般式(１)において、Ｒ_１が上記一般式(２)で示されるピペリジル基を含有するトリアジン誘導体基であり、R₂がR₁であり、R_2'が水素原子であり、ａ，ｂ及びｃがそれぞれ、３，２，３の正数である窒素含有化合物である。
【化５】

（式中、R₃は炭素原子数１〜１０のアルキル基または水素原子を表し、R₄は炭素原子数５〜１０のシクロアルキル基または炭素原子数１〜４のアルキル基で置換された炭素原子数５〜１０のシクロアルキル基を表す。）
【０００８】
本発明においては、上記熱可塑性樹脂に対して上記難燃剤を所望量配合し、溶融混練して使用する。上記難燃剤は熱可塑性樹脂の加工温度領域で融点を有し、熱可塑性樹脂に相溶するので、成形品のクロスシートの透明性は良好である。即ち、従来の難燃剤は融点が高く、熱可塑性樹脂に分散させて白濁したものを多量に用いているのに比べ、本発明の難燃剤は熱可塑性樹脂に相溶しているので、該クロスシートの透明性は著しく改善される。
上記難燃剤の配合割合は、熱可塑性樹脂に対して０．１〜５重量％、好ましくは０．５〜４重量％の範囲である。 上記配合量が上記範囲未満では難燃性が不十分であり、上記範囲を超えると難燃性の効果がそれ以上向上せず、逆にコストアップにつながるので好ましくない。
【０００９】
延伸糸の形態としては、フィルムをスリットして延伸したフラットヤーンや、フラットヤーンを割繊したスプリットヤーン、また円形または異形ノズルから押し出したフィラメントを延伸したモノフィラメントや、低繊度フィラメントを収束したマルチフィラメントなどの単層型あるいは多層型、芯鞘型、並列型等の複合糸条など制限なく採用される。
【００１０】
延伸糸の製造方法はとくに限定されるものではなく、公知の製造方法により一軸延伸を施した延伸糸を形成する。延伸倍率は４〜１２倍の範囲であり、好ましくは６〜１０倍の範囲である。延伸倍率が４倍未満では、引張強度が不十分となり本発明の目的を達成するのが困難となり、１２倍を超えると延伸切れなどのために生産性が低下して好ましくない。延伸処理はポリオレフィンの融点以下、軟化点以上の温度にて行われるが、加熱方式としては、熱ロール式、熱板式、赤外線式、熱風式等いずれの方式も採用でき、これらの内では熱ロール式が延伸効率、高速生産性、安定性の上で好ましい。成形された未延伸糸は加熱され、前後ロールの周速度差により延伸を行う。
【００１１】
上記延伸糸の繊度は１００〜３０００デシテクス（以下、dtと略記する）の範囲であり、好ましくは、５００〜２０００dtの範囲である。繊度が１００dt未満では強度が不十分となり、３０００dtを超えると柔軟性が劣り取扱い性が低下するので好ましくない。
【００１２】
このようにして得られた熱可塑性樹脂製延伸糸を経緯糸に用いて織成して織編布を形成する。織編布の組織としては、特に限定されるものではなく、織物では、例えば、平織、綾織、模紗織、絽織、絡み織などが挙げられ、編物ではラッセル編、トリコット編み、ミラニーズ編等が挙げられる。上記経緯糸の打込密度は通常５〜４０本／２.５４ｃｍ、好ましくは１０〜３０本／２.５４ｃｍの範囲である。また、織編布の目付量は２０〜５００ｇ／ｍ^２の範囲であり、好ましくは３０〜２５０ｇ／ｍ^２の範囲である。
【００１３】
本発明のクロスシートの光透過率はＪＩＳＬ１０５５Ａ法に準じて測定した値で４０％以上、好ましくは４５〜８５％、さらに好ましくは６０〜８５％の範囲である。該クロスシートの光透過率が４０％未満では、被覆した内容物の視認性に欠けるので好ましくない。
該光透過率を上記範囲にするには、熱可塑性樹脂の種類、延伸糸の繊度及び難燃剤の配合量を上記範囲内で調節することにより、調整可能である。
【００１４】
また、上記クロスシートは土嚢、雑袋、コンテナーバッグ等に用いられることから、長期間日光に晒されるために高い耐候性が必要とされている。本発明で用いる難燃剤は、ピペリジル基を有するトリアジン誘導体であり、それ自身がヒンダードアミン系の光安定剤として働くため、非常に高い耐候性を有する。さらに、耐候性を改良する方法としては、紫外線吸収剤や光安定剤等の耐候剤を添加する方法を採用することもできる。
【００１５】
紫外線吸収剤の具体例としては、具体的には２-エチルヘキシル-２-シアノ-３,３’−ジフェニルアクリレート、エチル-２-シアノ-３,３’-ジフェニルアクリレート、オクチル-２-シアノ-３,３’-ジフェニルアクリレート等のシアノアクリレート系紫外線吸収剤、２,４-ジヒドロキシベンゾフェノン、２-ヒドロキシ-４-メトキシベンゾフェノン、２-ヒドロキシ-４-オクトキシベンゾフェノン等のベンゾフェノン系紫外線吸収剤、２-（２′-ヒドロキシ -５′-メチルフェニル）ベンゾトリアゾール、２-（２′-ヒドロキシ-５′-t-オクチルフェニル）ベンゾトリアゾール等のベンゾトリアゾール系紫外線吸収剤、レゾルシノールモノベンゾエート、２,４-ジ-t-ブチルフェニル-３′-５′-ジ-t-ブチル-４′-ヒドロキシベンゾエート等のベンゾエート系紫外線吸収剤などが挙げられる。
【００１６】
ヒンダードアミン系光安定剤としては、ビス（２,２,６,６-テトラメチル-４-ピペリジル）セバケート、テトラキス（２,２,６,６-テトラメチル-４-ピペリジル）-１,２,３,４-ブタンテトラカルボキシレート、ビス（１,２,２,６,６-ペンタメチル-４-ピペリジル）・ジ（トリデシル）-１,２,３,４-ブタンテトラカルボキシレート、１-（２-ヒドロキシエチル）-２,２,６,６-テトラメチル-４-ピペリジノールとコハク酸ジエチルの重縮合物等が挙げられる。
【００１７】
本発明の熱可塑性樹脂には、本発明の趣旨を逸脱しない範囲において、酸化防止剤、分散剤、滑剤、帯電防止剤、顔料、無機充填剤、架橋剤、発泡剤、核剤等の通常用いられる添加剤を配合してもよい。
【００１８】
【実施例】
実施例１
高密度ポリエチレン（密度＝０.９５０ｇ／ｃｍ^３、ＭＦＲ＝０．６ｇ／１０分）に対し、上記一般式(３)及び一般式(４)で示されるものを組み合わせた窒素含有化合物からなる難燃剤を２重量％配合し、これを６５ｍｍφの押出機を用いて溶融温度２３０℃でＴダイ法を用いてフィルムに押出し、水槽法で冷却してフィルムを形成した。
このフィルムを８ｍｍ幅にスリットし、ついで熱ロール法で延伸倍率９倍で延伸して繊度１１００dtのフラットヤーンを得た。
このフラットヤーンを用いて、縦横１０本×１０本／２．５４ｃｍの打込密度で、平織の織布を形成した。
得られたポリエチレンクロスシートは無色透明であり、その光透過率はＪＩＳＬ１０５５Ａ法による値で８０％であった。また、難燃性試験において、ＪＩＳＡ１３２２による燃焼試験では炭化長４５ｍｍで防炎１級に合格であった。
【００１９】
比較例１
実施例１において、難燃剤をメラミンシアヌレート（商品名：ＭＣ−６１０、日産化学株式会社製）に変え、上記ポリエチレン１００重量部に対し、メラミンシアヌレート１０重量部を配合して行ったこと以外は同様にして行った。
その結果、得られたポリエチレンクロスシートは白色であり、その光透過率はＪＩＳＬ１０５５Ａ法による値で１０％であった。また、難燃性試験では炭化長１５０ｍｍ以上で、ＪＩＳＡ１３２２の防炎性規格に不合格であった。
なお、上記防炎性規格に合格するのに必要なメラミンシアヌレートの配合量は上記ポリエチレン１００重量部に対し、それぞれ３０重量部必要であり、本発明で用いる難燃剤はわずか２重量％配合することで十分効果を有するのに比べ、大量添加しないと満足する難燃効果が得られないことがわかった。
【００２０】
比較例２
実施例１において、難燃剤を臭素系難燃剤デカブロムジフェニルエーテルと三酸化アンチモンを３：１の比率の混合物に変え、上記ポリエチレン１００重量部に対し、それぞれ１０重量部を配合して行ったこと以外は同様にして行った。
その結果、得られたポリエチレンクロスシートは白色であり、その光透過率はＪＩＳＬ１０５５Ａ法による値で２０％であった。また、難燃性試験では炭化長８０ｍｍで、ＪＩＳＡ１３２２の防炎１級に不合格であった。
【００２１】
比較例３
実施例１において、難燃剤をトリリン酸アンモンに変え、上記ポリエチレン１００重量部に対し、それぞれ１０重量部を配合して行ったこと以外は同様にして行った。
その結果、得られたポリエチレンクロスシートは白色であり、その光透過率はＪＩＳＬ１０５５Ａ法による値で１０％であった。また、難燃性試験では炭化長無限大で、ＪＩＳＡ１３２２の防炎性規格に不合格であった。
【００２２】
【発明の効果】
以上説明したように、本発明は、熱可塑性樹脂延伸糸を経緯糸に用いた織編布からなるクロスシートであって、該熱可塑性樹脂に上記一般式（１）で示される窒素含有化合物からなる難燃剤を配合してなるものであって、ハロゲン系難燃剤やりん系難燃剤のように有毒ガスの発生の恐れがなく、かつ無機系難燃剤のように燃焼後の灰分の残存する恐れのなく、少量の配合することによって、クロスシートの内容物を容易に視認可能な光透過性を有するものにすることができ、耐候性、及び難燃性に優れたポリオレフィンクロスシートを提供することができる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a light-transmitting cross sheet that is used for sandbags, miscellaneous bags, container bags, and the like, and whose contents can be easily visually confirmed.
[0002]
[Prior art]
Conventionally, as a cross sheet used for sandbags, miscellaneous bags, container bags, etc., there are many known cross sheets made of woven fabric using nylon, polyester fiber or polyolefin resin blended with a flame retardant for warp and weft. . As flame retardants used in these cloth sheets, halogen flame retardants, phosphorus flame retardants, and inorganic flame retardants such as magnesium hydroxide are generally known.
[0003]
[Problems to be solved by the invention]
However, these cloth sheets have a problem in that the light transmittance, that is, transparency is remarkably lowered due to the inclusion of the flame retardant, and the visibility of the contents is lacking. Further, the halogen flame retardants and phosphorus flame retardants cause not only environmental pollution problems by generating toxic gases such as dioxins during incineration, but also problems such as corrosion of the apparatus due to corrosive gases. Therefore, in recent years, a method of adding a hydrate of an inorganic metal compound such as aluminum hydroxide or magnesium hydroxide as a non-polluting flame retardant that does not generate harmful gases during combustion, has low smoke properties (for example, special (Kaihei 2-53845, etc.) has been studied in various ways, but there is a problem that if it is not added in a large amount, there will be no effect, and inorganic flame retardants will generate ash after incineration and cause problems such as filter clogging. It was.
The present invention has been made paying attention to the above-mentioned problems, and does not generate toxic gas during incineration, has flame retardancy free from residual ash, and can easily recognize the coated contents. An object is to provide a permeable cloth sheet.
[0004]
[Means for Solving the Problems]
As a result of intensive studies to solve the above-mentioned problems, the present inventors have found that the above object can be achieved by adding a small amount of a specific triazine derivative as a flame retardant, and to complete the present invention. It came.
That is, the gist of the present invention is a woven / knitted fabric cloth sheet using a thermoplastic resin drawn yarn as a warp, and the thermoplastic resin is made of a nitrogen-containing compound represented by the following general formula (1). There is a light-transmitting cross sheet comprising a flame retardant, and the light transmittance of the cross sheet is 40% or more.
H (R ₁ ) N- (CH ₂ ) _a -N (R ₂ )-(CH ₂ ) _b -N (R _{2 '} )-(CH ₂ ) _c -N (R ₁ ) H (1)
(In the formula, R ₁ is a triazine derivative group containing a piperidyl group represented by the following general formula (2), R _{2 and} R _{2 ′} represent R ₁ or a hydrogen atom, and a, b and c are respectively Represents a positive number from 2 to 5.)
[Chemical 3]

(In the formula, R ₃ represents an alkyl group having 1 to 10 carbon atoms or a hydrogen atom, and R ₄ is a carbon substituted with a cycloalkyl group having 5 to 10 carbon atoms or an alkyl group having 1 to 4 carbon atoms. Represents a cycloalkyl group having 5 to 10 atoms.)
[0005]
DETAILED DESCRIPTION OF THE INVENTION
Examples of the thermoplastic resin used in the present invention include polyolefin, nylon, and polyester. Specific examples of polyolefins include high-density polyethylene, medium-density polyethylene, low-density polyethylene, linear low-density polyethylene, and polyethylene-based resins such as ethylene / α-olefin copolymers produced using a metallocene catalyst, Polypropylene resins such as propylene homopolymer, ethylene-propylene block copolymer, ethylene-propylene random copolymer, etc. Among these, high-density polyethylene, propylene Coalescence is preferred.
[0006]
As the flame retardant used in the present invention, a nitrogen-containing compound represented by the following general formula (1) is used.
H (R ₁ ) N- (CH ₂ ) _a -N (R ₂ )-(CH ₂ ) _b -N (R _{2 '} )-(CH ₂ ) _c -N (R ₁ ) H (1)
(In the formula, R ₁ is a triazine derivative group containing a piperidyl group represented by the following general formula (2), R _{2 and} R _{2 ′} represent R ₁ or a hydrogen atom, and a, b and c are respectively Represents a positive number from 2 to 5.)
[Formula 4]

(In the formula, R ₃ represents an alkyl group having 1 to 10 carbon atoms or a hydrogen atom, and R ₄ is a carbon substituted with a cycloalkyl group having 5 to 10 carbon atoms or an alkyl group having 1 to 4 carbon atoms. Represents a cycloalkyl group having 5 to 10 atoms.)
[0007]
As the nitrogen-containing compound represented by the general formula (1), a nitrogen-containing compound represented by the following general formula (3) is preferable, and a combination of the following general formula (3) and the following general formula (4) is particularly preferable.
H (R ₁ ) N- (CH ₂ ) ₃ -N (R ₁ )-(CH ₂ ) ₂ -NH- (CH ₂ ) ₃ -N (R ₁ ) H (3)
That is, in the nitrogen-containing compound represented by the general formula (3), in the general formula (1), R ₁ is a triazine derivative group containing a piperidyl group represented by the general formula (2), and R ₂ is A nitrogen-containing compound in which R ₁ , R _{2 ′} is a hydrogen atom, and a, b, and c are positive numbers 3, 2, and 3, respectively.
[Chemical formula 5]

(In the formula, R ₃ represents an alkyl group having 1 to 10 carbon atoms or a hydrogen atom, and R ₄ is a carbon substituted with a cycloalkyl group having 5 to 10 carbon atoms or an alkyl group having 1 to 4 carbon atoms. Represents a cycloalkyl group having 5 to 10 atoms.)
[0008]
In the present invention, a desired amount of the flame retardant is blended with the thermoplastic resin and used after being melt-kneaded. The flame retardant has a melting point in the processing temperature region of the thermoplastic resin and is compatible with the thermoplastic resin, so that the cross sheet of the molded article has good transparency. That is, the conventional flame retardant has a high melting point, and the flame retardant of the present invention is compatible with the thermoplastic resin compared to the case where a large amount of the white turbid dispersion dispersed in the thermoplastic resin is used. The transparency of the sheet is significantly improved.
The blending ratio of the flame retardant is in the range of 0.1 to 5% by weight, preferably 0.5 to 4% by weight with respect to the thermoplastic resin. If the blending amount is less than the above range, the flame retardancy is insufficient, and if it exceeds the above range, the flame retardancy effect is not further improved, and conversely, the cost is increased, which is not preferable.
[0009]
As for the form of drawn yarn, flat yarn obtained by slitting a film, split yarn obtained by splitting a flat yarn, monofilament obtained by drawing a filament extruded from a circular or irregular nozzle, and multifilament in which low-definition filaments are converged A single layer type such as a single layer type, a multi-layer type, a core-sheath type, a parallel type or the like is used without limitation.
[0010]
The method for producing drawn yarn is not particularly limited, and a drawn yarn subjected to uniaxial drawing is formed by a known production method. The draw ratio is in the range of 4 to 12 times, preferably in the range of 6 to 10 times. If the draw ratio is less than 4 times, the tensile strength becomes insufficient and it is difficult to achieve the object of the present invention. The stretching process is performed at a temperature below the melting point of the polyolefin and above the softening point, but any heating system such as a hot roll type, a hot plate type, an infrared type, or a hot air type can be adopted. The formula is preferable in view of stretching efficiency, high-speed productivity, and stability. The formed undrawn yarn is heated and drawn by the difference in peripheral speed between the front and rear rolls.
[0011]
The fineness of the drawn yarn is in the range of 100 to 3000 dtex (hereinafter abbreviated as dt), and preferably in the range of 500 to 2000 dt. If the fineness is less than 100 dt, the strength is insufficient, and if it exceeds 3000 dt, the flexibility is inferior and the handleability is lowered.
[0012]
The stretched thermoplastic resin yarn thus obtained is woven using warp and weft to form a woven or knitted fabric. The structure of the woven or knitted fabric is not particularly limited, and examples of the woven fabric include plain weave, twill weave, imitation weave, leopard weave, woven fabric, etc. Can be mentioned. The weft density of the warp and weft yarns is usually in the range of 5 to 40 yarns / 2.54 cm, preferably 10 to 30 yarns / 2.54 cm. The basis weight of the woven or knitted fabric is in the range of ^{20 to} 500 g / m ² , preferably in the range of 30 to 250 g / m ² .
[0013]
The light transmittance of the cross sheet of the present invention is 40% or more, preferably 45 to 85%, more preferably 60 to 85%, as measured according to the JIS L1055A method. If the light transmittance of the cross sheet is less than 40%, the visibility of the coated contents is insufficient.
In order to make this light transmittance into the said range, it can adjust by adjusting the kind of thermoplastic resin, the fineness of a drawn yarn, and the compounding quantity of a flame retardant within the said range.
[0014]
Moreover, since the said cross sheet is used for a sandbag, a miscellaneous bag, a container bag, etc., since it is exposed to sunlight for a long period of time, high weather resistance is required. The flame retardant used in the present invention is a triazine derivative having a piperidyl group, and itself has a very high weather resistance because it functions as a hindered amine light stabilizer. Furthermore, as a method for improving the weather resistance, a method of adding a weather resistance agent such as an ultraviolet absorber or a light stabilizer may be employed.
[0015]
Specific examples of the ultraviolet absorber include 2-ethylhexyl-2-cyano-3,3′-diphenyl acrylate, ethyl-2-cyano-3,3′-diphenyl acrylate, and octyl-2-cyano-3. Cyanoacrylate UV absorbers such as 3,3'-diphenyl acrylate, 2,4-dihydroxybenzophenone, 2-hydroxy-4-methoxybenzophenone, benzophenone UV absorbers such as 2-hydroxy-4-octoxybenzophenone, 2- (2'-hydroxy-5'-methylphenyl) benzotriazole, benzotriazole UV absorbers such as 2- (2'-hydroxy-5'-t-octylphenyl) benzotriazole, resorcinol monobenzoate, 2,4- Benzoate UV absorption such as di-t-butylphenyl-3'-5'-di-t-butyl-4'-hydroxybenzoate Agents and the like.
[0016]
Examples of hindered amine light stabilizers include bis (2,2,6,6-tetramethyl-4-piperidyl) sebacate and tetrakis (2,2,6,6-tetramethyl-4-piperidyl) -1,2,3. , 4-butanetetracarboxylate, bis (1,2,2,6,6-pentamethyl-4-piperidyl) di (tridecyl) -1,2,3,4-butanetetracarboxylate, 1- (2- (Hydroxyethyl) -2,2,6,6-tetramethyl-4-piperidinol and polycondensate of diethyl succinate.
[0017]
In the thermoplastic resin of the present invention, an antioxidant, a dispersant, a lubricant, an antistatic agent, a pigment, an inorganic filler, a cross-linking agent, a foaming agent, a nucleating agent and the like are usually used without departing from the spirit of the present invention. Additives may be blended.
[0018]
【Example】
Example 1
Difficulty consisting of a nitrogen-containing compound in which high-density polyethylene (density = 0.950 g / cm ³ , MFR = 0.6 g / 10 min) is combined with those represented by the above general formula (3) and general formula (4) 2% by weight of a flame retardant was blended, and this was extruded into a film using a T-die method at a melting temperature of 230 ° C. using a 65 mmφ extruder and cooled by a water bath method to form a film.
This film was slit to a width of 8 mm, and then stretched by a hot roll method at a stretching ratio of 9 to obtain a flat yarn having a fineness of 1100 dt.
Using this flat yarn, a plain woven fabric was formed at a driving density of 10 × 10 / 2.54 cm.
The obtained polyethylene cloth sheet was colorless and transparent, and the light transmittance was 80% as measured by the JIS L1055A method. Moreover, in the flame retardancy test, the combustion test according to JISA1322 passed the flame protection class 1 with a carbonization length of 45 mm.
[0019]
Comparative Example 1
In Example 1, the flame retardant was changed to melamine cyanurate (trade name: MC-610, manufactured by Nissan Chemical Co., Ltd.), and 10 parts by weight of melamine cyanurate was blended with 100 parts by weight of the polyethylene. Was done in the same way.
As a result, the obtained polyethylene cloth sheet was white, and the light transmittance was 10% as a value according to the JISL1055A method. In the flame retardancy test, the carbonization length was 150 mm or more, and the flameproof standard of JISA1322 was not accepted.
The blending amount of melamine cyanurate necessary to pass the flameproof standard is 30 parts by weight with respect to 100 parts by weight of the polyethylene, and the flame retardant used in the present invention is blended by only 2% by weight. It was found that a satisfactory flame retardant effect cannot be obtained unless a large amount is added, compared with the case where the effect is sufficient.
[0020]
Comparative Example 2
In Example 1, except that the flame retardant was changed to a mixture of bromine-based flame retardant decabromodiphenyl ether and antimony trioxide in a ratio of 3: 1, and 10 parts by weight with respect to 100 parts by weight of the polyethylene. Was done in the same way.
As a result, the obtained polyethylene cloth sheet was white, and the light transmittance was 20% as a value according to the JIS L1055A method. Further, in the flame retardancy test, the carbonization length was 80 mm, and the flameproof grade 1 of JISA1322 was rejected.
[0021]
Comparative Example 3
In Example 1, the procedure was carried out in the same manner except that the flame retardant was changed to ammon triphosphate and 10 parts by weight were blended with 100 parts by weight of the polyethylene.
As a result, the obtained polyethylene cloth sheet was white, and the light transmittance was 10% as a value according to the JISL1055A method. Further, in the flame retardancy test, the carbonization length was infinite, and the flame retardancy standard of JIS A1322 was rejected.
[0022]
【The invention's effect】
As described above, the present invention is a cloth sheet made of a woven or knitted fabric using a thermoplastic resin drawn yarn as a warp and weft, and the thermoplastic resin includes a nitrogen-containing compound represented by the general formula (1). The flame retardant is formulated with no danger of toxic gas generation like halogen flame retardants and phosphorus flame retardants, and ash content after combustion may remain like inorganic flame retardants. To provide a polyolefin cloth sheet having excellent weather resistance and flame retardancy, by adding a small amount of the composition, so that the contents of the cloth sheet can be easily visually recognized. Can do.

Claims (4)

A cross sheet of a woven or knitted fabric using a thermoplastic resin drawn yarn as a warp and weft, comprising a flame retardant comprising a nitrogen-containing compound represented by the following general formula (1) in the thermoplastic resin; and A light-transmitting cross sheet, wherein the light transmittance of the cross sheet is 40% or more.
H (R ₁ ) N- (CH ₂ ) _a -N (R ₂ )-(CH ₂ ) _b -N (R _{2 '} )-(CH ₂ ) _c -N (R ₁ ) H (1)
(In the formula, R ₁ is a triazine derivative group containing a piperidyl group represented by the following general formula (2), R _{2 and} R _{2 ′} represent R ₁ or a hydrogen atom, and a, b and c are respectively Represents a positive number from 2 to 5.)

(In the formula, R ₃ represents an alkyl group having 1 to 10 carbon atoms or a hydrogen atom, and R ₄ is a carbon substituted with a cycloalkyl group having 5 to 10 carbon atoms or an alkyl group having 1 to 4 carbon atoms. Represents a cycloalkyl group having 5 to 10 atoms.) The light-transmissive cloth sheet according to claim 1, wherein the thermoplastic resin is a polyolefin. The light-transmitting cloth sheet according to claim 1, wherein the amount of the flame retardant is in the range of 0.1 to 5% by weight with respect to the polyolefin. The light-transmitting cloth sheet according to claim 1, wherein the flame retardant is a nitrogen-containing compound represented by the following general formula (3).
H (R ₁ ) N- (CH ₂ ) ₃ -N (R ₁ )-(CH ₂ ) ₂ -NH- (CH ₂ ) ₃ -N (R ₁ ) H (3)
(In the formula, R ₁ is a triazine derivative group containing a piperidyl group represented by the following general formula (4).)