JPS6152860B2

JPS6152860B2 -

Info

Publication number: JPS6152860B2
Application number: JP16230778A
Authority: JP
Inventors: Akyoshi Oosaki
Original assignee: Nippon Carbide Industries Co Inc
Current assignee: Nippon Carbide Industries Co Inc
Priority date: 1978-12-29
Filing date: 1978-12-29
Publication date: 1986-11-14
Also published as: JPS5590547A

Description

【発明の詳細な説明】本発明は塩素化塩化ビニル系樹脂シートに関
し、更に詳しくは塩素化塩化ビニル樹脂の特徴で
ある耐熱性及び難燃性を損なうことなく加工成形
性、真空成形性、ヒートシール性、圧縮成形性及
び耐衝撃性を改良した塩素化塩化ビニル系樹脂シ
ートに関する。塩素化塩化ビニル樹脂（以下、Ｃ−PVCと略
記する）は、塩化ビニル樹脂（以下、PVCと略
記する）を塩素化してPVCの良好な耐薬品性、
耐候性、接着性、電気絶縁性その他の特性を維持
しつつその耐熱性を改良し、且つ更に高い剛性、
難燃性などを付与した樹脂であり、その特性を生
かして高温用途のパイプ、継手、バルブなどの配
管用材料をはじめとしてその他耐熱シート、工業
用充填剤、電気部品、難燃化剤、接着剤などに広
く用いられている。しかしながら、このＣ−PVCには次のような
問題点がある。即ち、 (1) 加工成形性が低い。Ｃ−PVCはPVCと同様に押出成形、射出成
形、カレンダー成形、圧縮成形などの成形法を
適用することができるが、溶融粘度が高く、ト
ルクが大で生産性が悪い。また溶融温度と化学
的分解温度との差、所謂、成形温度幅が狭く、
成形時に熱分解によるスジヤケ黄変が生じ易
く、極端な場合には成形不可能となる。 (2) 真空成形性に劣る。Ｃ−PVCは成形用シートを真空成形により
２次加工して容器その他を成形する際に引張伸
びの温度、テンシヨン及び圧力依存在が大きい
ため成形品各部の伸びが異なり、その結果成形
品に肉厚ムラが生じ易いという問題がある。 (3) ヒートシール性が悪い。Ｃ−PVCは耐熱性が高いためシート間或い
は真空成形容器と蓋との熱融着性が悪く、その
結果接着不良を惹起するか或いは強熱によるヤ
ケが生じやすい。 (4) 圧縮成形性が悪い。Ｃ−PVCは特にシートを積層して肉厚10mm
以上の圧縮成形をする場合に熱融着性が悪く、
内部で剥離を生じやすい。 (5) 耐衝撃性が低い。Ｃ−PVCは塩素化によつてPVCに比し耐熱
性が著るしく改良されているが、同時に脆化温
度もPVCより高くなり、その結果衝撃に弱く
なつている。従つて、本発明の目的は前述の従来のＣ−
PVCの問題点を排除し、Ｃ−PVCの特徴である
耐熱性及び難燃性を損なうことなく、加工成形
性、真空成形性、ヒートシール性、圧縮成形性及
び耐衝撃性を改良した塩素化塩化ビニル系樹脂シ
ートを提供することにある。本発明に例えば、(A)塩素化塩化ビニル樹脂20〜
98重量部、好ましくは30〜70重量部及び(B)ゴム−
ニトリルもしくはメタクリレート系モノマー−ス
チレン系モノマー共重合体２〜80重量部、好まし
くは30〜70重量部の樹脂混合物100重量部に対し
(C)酢酸ビニル含量50重量％超〜90重量％、好まし
くは55〜70重量％のエチレン−酢酸ビニル共重合
体0.5〜50重量部、好ましくは１〜20重量部を配
合して成る樹脂配合物を成形して成る塩素化塩化
ビニル系樹脂シートが提供される。本発明に従つた塩素化塩化ビニル系樹脂組成物
は、前記(A)及び(B)成分に対し特定の(C)成分を配合
することによつて、難燃性などのＣ−PVCの特
性を損なうことなく、配合物の相溶性や耐衝撃性
などが改良され、特に真空成形時の深絞り特性、
肉厚均一性、ヒートシール特性及び圧縮融着性な
どに優れ、またＴ−ダイ押出によるシート形成性
にすぐれ、更に押出成形によれば、加工成形性、
真空成形性、ヒートシール性、圧縮成形性及び耐
衝撃性に際立つて優れた成形用シートを得ること
ができ、またカレンダー成形によるシートより表
面光沢に優れ、フローマークが少なく、かつ任意
のシート厚みの成形用シートを得ることができ
る。前記成分(C)の量が0.5重量部未満の場合には
上述の如き好ましい改良が未だ十分でなく、一方
成形分(C)の量が50重量部を超えるとＣ−PVC本
来の難燃性が低下するので好ましくない。前記成分(C)のエチレン−酢酸ビニル共重合体中
の酢酸ビニル含量が50重量％以下の場合には上述
の如き卓越した改良効果が未だ十分でなく、この
ことは酢酸ビニル含量が90重量％を越える場合に
も同様である。このような特定のエチレン−酢酸
ビニル共重合体を成分(C)として配合することによ
り、押出シート表面平滑性に優れ、かつ耐衝撃性
の著るしく高いシートが得られる。加えて二次成
形性の良い、即ち真空成形時の厚みのムラの少な
いシートを供給することができる。本発明の塩素化塩化ビニル系樹脂シートを成形
するのに使用する樹脂配合物に成分(A)として配合
するＣ−PVCは特に限定はないが、一般には塩
素含量60〜70％で重合度300〜1500のものが好ま
しい。このようなＣ−PVCは、例えば特公昭36
−888号公報及び同45−30833号公報などに記載さ
れた公知方法で製造することができる。本発明の塩素化塩化ビニル系樹脂シートを成形
するのに使用する樹脂配合物に成分(B)として配合
するゴム−ニトリルもしくはメタクリレート系モ
ノマー−スチレン系モノマー共重合体は、例え
ば、天然ゴム、ポリブタジエン、ブタジエン−ス
チレン共重合体、ブタジエン−アクリロニトリル
共重合体、ポリクロロプレン、アクリル酸エステ
ル共重合体、エチレン−プロピレン共重合体、塩
素化ポリエチレン、塩素化ポリプロピレン、エチ
レン−酢酸ビニル共重合体、エピクロルヒドリン
ゴム、その他各種合成ゴムなどのゴム状物質に、
スチレン、メチルスチレン、α−メチルスチレ
ン、クロルスチレン、ジクロロスチレンなどのモ
ノビニル芳香族単量体（ステレン系モノマー）
と、アクリロニトリル、メタクリロニトリル、エ
タクリロニトリルなどの不飽和ニトリル単量体
（ニトリル系モノマー）又はアクリル酸エステ
ル、メタクリル酸エステル、マルイン酸モノもし
くはジエステル、フマール酸モノもしくはジエス
テル、イタコン酸モノもしくはジエステル、クロ
トン酸エステル、アクリル酸、メタクル酸、クロ
トン酸、マレイン酸、イタコン酸、などのα・β
−モノオレフイン系不飽和カルボン酸及びその誘
導体（メタクリレート系モノマー）とを常法に従
つてグラフト重合したものである。例えばABS
樹脂、AAS樹脂、ASA樹脂、ACS樹脂、MBS樹
脂などと呼ばれる樹脂はこの明細書においては、
本発明でいう「ゴム−ニトリルもしくはメタクリ
レート系モノマー−スチレン系モノマー共重合
体」なる語に包含される。共重合体の組成には限
定はないが、好ましくはゴム10〜50重量％、ニト
リルもしくはメタクリレート系モノマー10〜40重
量％及びスチレン系モノマー20〜60重量％であ
る。本発明の好ましい塩素化塩化ビニル系樹脂シー
トを成形するのに使用する樹脂配合物に成分(C)と
して配合する、酢酸ビニル含量50重量％超〜90重
量％のエチレン−酢酸ビニル共重合体は公知のも
のであり、それぞれ常法に従つて共重合したもの
を使用でき、また、例えばソアブレンBH（日本
合成化学(株)製エチレン−酢酸ビニル共重合体）な
どの市販品を使用することもできる。本発明の塩素化塩化ビニル系樹脂シートを成形
するのに使用する樹脂混合物には、上記成分(A)、
(B)及び(C)の他に、樹脂成形用組成物に一般的に配
合される任意の添加剤、例えば熱安定剤、滑剤、
充填剤、紫外線吸収剤、帯電防止剤、抗酸化剤、
可塑剤、顔料、染料、改質材などを一般的な添加
量で適宜配合することができる。本発明に用いる樹脂配合物の配合操作は、通常
の混合機、例えばヘンシエルミキサー、スーパー
ミキサーなどの高速ミキサー、リボンブレンダ
ー、擂潰器、ロールミキサー、バンバリーミキサ
ー、タンブラーなどを用いて好適に実施すること
ができる。このような樹脂配合物は、粉末状もし
くは粉末とペレツトの混合物として又は押出機、
ロールシールなどでペレツト状としてシート成形
装置に供給することができる。本発明に係る塩素化塩化ビニル系樹脂シートは
上記樹脂配合物をカレンダー成形、押出成形、キ
ヤスト成形、その他の一般的なシート成形法によ
つて成形することができる。特に好ましい成形法
はＴ−ダイもしくはスクリユーダイによる押出成
形である。例えば、単軸、同方向二軸又は異方向
二軸押出機にＴ−ダイ又はスクリユーダイをセツ
トして光沢に優れ、フローマークが少なく、か
つ、任意の肉厚シートを製造することができる。
好ましい押出条件は樹脂温で200〜210℃、押出機
ヘツド圧で200〜250Kg/cm²となるようにシリンダ
ー、ダイ温度及びスクリユー回転数を選ぶ。従来
のカレンダー成形によるシートでは両面に光沢を
出すことが難しく、またバンクフローによるフロ
ーマーク及びエアーマークは避けられなかつた
し、その上肉厚も高々１mm程度までであり、それ
以上の肉厚のシートを得ようとすると、フローマ
ークが激しくなつて良好なシートは得られなかつ
た。また、従来のＣ−PVC組成物は、Ｔ−ダイ
押出加工しても、Ｔ−ダイリツプ出口における偏
肉及び偏流が甚だしく良好なシートは得られなか
つた。このように、本発明に従えば、Ｃ−PVCの耐
熱性及び難熱性を損なうことなく、加工成形性、
真空成形性、ヒートシール性、圧縮成形性及び耐
衝撃性を改良した0.2〜５mm厚のシートを好適に
製造することができ、成形したシートはそのまま
建材、壁化粧シートその他に使用できるが、更に
前述の如き特性を備えた真空成形、圧縮成形など
の二次成形用素材である成形用シートとして好適
に使用することができる。以下、本発明の実施例を説明する。実施例中に
おいて「部」及び「％」は特にことわらない限り
それぞれ「重量部」及び「重量％」を示す。例１〜９ニカテンプＴ−025（日本カーバイド工業(株)製
Ｃ−PVC、塩素含量64.5％、η_sp0.275）60部、
タフレツクス410（ABS樹脂）（三菱モンサント
(株)製）40部及び第１表に示した成分(C)を第１表に
示した割合で配合し、この混合物100部に熱安定
剤、（三共有機合成(株)製スタンRC−71）３部、滑
剤（ヘキストWax Ｅ）１部及び滑剤（川研フア
インケミカル(株)製ステアリン酸Ｆ−３）１部を加
え、擂潰器にて30分混合した後、40mmφ押出機を
用いてペレツト状にし、次いで35mm巾Ｔダイを備
えた40mmφ単軸押出機を用いて厚さ１mmのシート
を押出成形した。得られたシートの光沢、真空成
形時の偏肉度、ヒートシール強度、圧縮融着性、
アイゾツト衝撃値及び難燃性を測定して結果を第
１表に示した。なお測定方法は次の通りである。 (1) シート表面光沢：シート光面の反射率を村上
式光沢計で60゜反射角における反射率（％）を
測定した。 (2) 偏肉度：押出成形シートから深さ50mm、底径
50mm及び上面径60mmの円筒カツプ状容器を真空
成形し、それを中心を通る面で縦断した断面の
肉厚を測定し、最大厚を最小厚で除して偏肉度
とした（ｎ＝３）。 (3) ヒートシール強度：押出成形シートから１号
ダンベル片を作成し、２枚を重ねヒートシーラ
ーにて200℃で５秒間加熱加圧した後、テンシ
ロンで引張荷重による剥離強度を測定してヒー
トシール強度（Kg/cm²）とした（ｎ＝３）。 (4) 圧縮融着性：20cm角シートを厚み440mmとな
るように所要枚数積層し、30Tonプレス機によ
り30Kg/cm²×190℃×10分間加熱加圧し、冷却後
中心を通る面で切断して内部融着性を肉眼で観
察し、〇−△−×で評価した。 (5) アイゾツト衝撃値（Kg・cm/cm）：ASTM−
Ｄ−256準拠。 (6) 難燃性（UL−94ランク）：UL Subject94準
拠。【表】DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a chlorinated vinyl chloride resin sheet, and more specifically, the present invention relates to a chlorinated vinyl chloride resin sheet, and more specifically, the present invention relates to a chlorinated vinyl chloride resin sheet that has excellent processing formability, vacuum formability, This invention relates to a chlorinated vinyl chloride resin sheet with improved sealing properties, compression moldability, and impact resistance. Chlorinated vinyl chloride resin (hereinafter abbreviated as C-PVC) is produced by chlorinating vinyl chloride resin (hereinafter abbreviated as PVC) to improve the chemical resistance of PVC.
Improved heat resistance while maintaining weather resistance, adhesion, electrical insulation and other properties, and even higher rigidity.
It is a resin that has been given flame retardant properties, and its properties are used to make piping materials for high-temperature applications such as pipes, fittings, and valves, as well as other heat-resistant sheets, industrial fillers, electrical parts, flame retardants, and adhesives. It is widely used as a drug. However, this C-PVC has the following problems. That is, (1) Processability is low. Like PVC, C-PVC can be molded using extrusion molding, injection molding, calendar molding, compression molding, and other molding methods, but has high melt viscosity, high torque, and poor productivity. In addition, the difference between the melting temperature and the chemical decomposition temperature, the so-called molding temperature range, is narrow.
Streaks and yellowing due to thermal decomposition are likely to occur during molding, and in extreme cases, molding becomes impossible. (2) Poor vacuum formability. When C-PVC is subjected to secondary processing of a molding sheet by vacuum forming to form containers and other objects, the tensile elongation is highly dependent on temperature, tension, and pressure, so the elongation of each part of the molded product is different, and as a result, the molded product has some thickness. There is a problem in that thickness unevenness tends to occur. (3) Poor heat sealability. Since C-PVC has high heat resistance, it has poor thermal adhesion between sheets or between a vacuum-formed container and a lid, resulting in poor adhesion or easy burning due to intense heat. (4) Poor compression moldability. C-PVC is especially made by laminating sheets to create a wall thickness of 10mm.
When compression molding is performed, the heat fusion properties are poor,
Peeling tends to occur internally. (5) Poor impact resistance. C-PVC has significantly improved heat resistance compared to PVC due to chlorination, but at the same time its embrittlement temperature is higher than that of PVC, making it weaker against impact. Therefore, the object of the present invention is to solve the above-mentioned conventional C-
Chlorination that eliminates the problems of PVC and improves processing formability, vacuum formability, heat sealability, compression moldability, and impact resistance without impairing the heat resistance and flame retardance that are the characteristics of C-PVC. The purpose of the present invention is to provide a vinyl chloride resin sheet. In the present invention, for example, (A) chlorinated vinyl chloride resin 20~
98 parts by weight, preferably 30 to 70 parts by weight and (B) rubber.
2 to 80 parts by weight of nitrile or methacrylate monomer-styrenic monomer copolymer, preferably 30 to 70 parts by weight, per 100 parts by weight of the resin mixture.
(C) A resin formulation comprising 0.5 to 50 parts by weight, preferably 1 to 20 parts by weight of an ethylene-vinyl acetate copolymer having a vinyl acetate content of more than 50% to 90% by weight, preferably 55 to 70% by weight. A chlorinated vinyl chloride resin sheet formed by molding a product is provided. The chlorinated vinyl chloride resin composition according to the present invention has the properties of C-PVC, such as flame retardancy, by blending a specific component (C) with the components (A) and (B). The compatibility and impact resistance of the compound have been improved without impairing the properties, especially the deep drawing properties during vacuum forming.
It has excellent wall thickness uniformity, heat sealing properties, compression fusion properties, etc. It also has excellent sheet formability by T-die extrusion, and has excellent processability and formability by extrusion molding.
It is possible to obtain a molding sheet with outstanding vacuum formability, heat sealability, compression moldability, and impact resistance, and it also has superior surface gloss than sheets produced by calendar molding, has fewer flow marks, and can be made to any desired sheet thickness. A sheet for molding can be obtained. If the amount of component (C) is less than 0.5 parts by weight, the above-mentioned preferable improvement is still insufficient, while if the amount of molding component (C) exceeds 50 parts by weight, the inherent flame retardancy of C-PVC may be impaired. This is not preferable because it reduces the When the vinyl acetate content in the ethylene-vinyl acetate copolymer of component (C) is 50% by weight or less, the above-mentioned outstanding improvement effect is still insufficient. The same applies when exceeding. By blending such a specific ethylene-vinyl acetate copolymer as component (C), an extruded sheet with excellent surface smoothness and extremely high impact resistance can be obtained. In addition, it is possible to supply a sheet with good secondary formability, that is, with less uneven thickness during vacuum forming. The C-PVC to be blended as component (A) into the resin compound used to mold the chlorinated vinyl chloride resin sheet of the present invention is not particularly limited, but generally has a chlorine content of 60 to 70% and a polymerization degree of 300. ~1500 is preferred. Such C-PVC, for example,
It can be produced by known methods described in JP-A-888 and JP-A-45-30833. The rubber-nitrile or methacrylate monomer-styrene monomer copolymer blended as component (B) in the resin compound used to mold the chlorinated vinyl chloride resin sheet of the present invention is, for example, natural rubber, polybutadiene, etc. , butadiene-styrene copolymer, butadiene-acrylonitrile copolymer, polychloroprene, acrylic ester copolymer, ethylene-propylene copolymer, chlorinated polyethylene, chlorinated polypropylene, ethylene-vinyl acetate copolymer, epichlorohydrin rubber , and other rubber-like substances such as various synthetic rubbers.
Monovinyl aromatic monomers (sterene monomers) such as styrene, methylstyrene, α-methylstyrene, chlorostyrene, dichlorostyrene, etc.
and unsaturated nitrile monomers (nitrile monomers) such as acrylonitrile, methacrylonitrile, ethacrylonitrile, acrylic acid esters, methacrylic acid esters, maric acid mono- or diesters, fumaric acid mono- or diesters, itaconic acid mono- or diesters , crotonic acid ester, acrylic acid, methacrylic acid, crotonic acid, maleic acid, itaconic acid, etc.
- A monoolefinic unsaturated carboxylic acid and its derivative (methacrylate monomer) are graft-polymerized according to a conventional method. For example ABS
In this specification, resins called resins, AAS resins, ASA resins, ACS resins, MBS resins, etc.
It is included in the term "rubber-nitrile or methacrylate monomer-styrene monomer copolymer" in the present invention. The composition of the copolymer is not limited, but preferably contains 10 to 50% by weight of rubber, 10 to 40% by weight of nitrile or methacrylate monomer, and 20 to 60% by weight of styrene monomer. The ethylene-vinyl acetate copolymer having a vinyl acetate content of more than 50% by weight to 90% by weight, which is blended as component (C) in the resin compound used for molding the preferred chlorinated vinyl chloride resin sheet of the present invention, is These are known products, and those copolymerized according to conventional methods can be used, and commercially available products such as Soabrene BH (ethylene-vinyl acetate copolymer manufactured by Nippon Gosei Kagaku Co., Ltd.) can also be used. can. The resin mixture used to mold the chlorinated vinyl chloride resin sheet of the present invention includes the above components (A),
In addition to (B) and (C), any additives commonly added to resin molding compositions, such as heat stabilizers, lubricants,
fillers, ultraviolet absorbers, antistatic agents, antioxidants,
Plasticizers, pigments, dyes, modifiers, and the like can be appropriately added in typical amounts. The blending operation of the resin compound used in the present invention is suitably carried out using a conventional mixer, for example, a high-speed mixer such as a Henschel mixer or a super mixer, a ribbon blender, a crusher, a roll mixer, a Banbury mixer, a tumbler, etc. can do. Such resin formulations can be prepared in powder form or as a mixture of powder and pellets or in an extruder,
It can be fed into a sheet forming apparatus in the form of pellets by roll sealing or the like. The chlorinated vinyl chloride resin sheet according to the present invention can be formed from the above resin composition by calender molding, extrusion molding, cast molding, or other general sheet molding methods. A particularly preferred molding method is extrusion molding using a T-die or screw die. For example, by setting a T-die or screw die in a single-screw, twin-screw extruder in the same direction, or twin-screw in opposite directions, a sheet with excellent gloss, few flow marks, and any desired thickness can be produced.
Preferred extrusion conditions are such that the cylinder, die temperature and screw rotation speed are selected so that the resin temperature is 200 to 210°C and the extruder head pressure is 200 to 250 kg/cm ² . With conventional calendar-formed sheets, it is difficult to create gloss on both sides, and flow marks and air marks due to bank flow are unavoidable.Furthermore, the wall thickness is at most about 1 mm, and thicker When trying to obtain a sheet, flow marks became severe and a good sheet could not be obtained. Further, even when conventional C-PVC compositions are subjected to T-die extrusion processing, uneven thickness and uneven flow at the exit of the T-die lip are so severe that a good sheet cannot be obtained. As described above, according to the present invention, it is possible to improve processability and formability without impairing the heat resistance and heat retardancy of C-PVC.
It is possible to suitably produce sheets with a thickness of 0.2 to 5 mm with improved vacuum formability, heat sealability, compression moldability, and impact resistance, and the formed sheets can be used as they are as building materials, decorative wall sheets, etc. It can be suitably used as a molding sheet, which is a material for secondary molding such as vacuum molding and compression molding, having the above-mentioned characteristics. Examples of the present invention will be described below. In the Examples, "parts" and "%" indicate "parts by weight" and "% by weight", respectively, unless otherwise specified. Examples 1 to 9 60 parts of Nikatemp T-025 (C-PVC manufactured by Nippon Carbide Industries Co., Ltd., chlorine content 64.5%, η _sp 0.275),
Toughflex 410 (ABS resin) (Mitsubishi Monsanto
Co., Ltd.) and the component (C) shown in Table 1 in the proportions shown in Table 1, and 100 parts of this mixture was mixed with a heat stabilizer and Stan RC (manufactured by Sankyoki Gosei Co., Ltd.). -71) 3 parts, 1 part of lubricant (Hoechst Wax E) and 1 part of lubricant (stearic acid F-3 manufactured by Kawaken Fine Chemical Co., Ltd.) were mixed in a crusher for 30 minutes, and then extruded to 40 mmφ. The mixture was formed into pellets using a machine, and then extruded into a sheet with a thickness of 1 mm using a 40 mmφ single screw extruder equipped with a 35 mm wide T-die. The gloss of the obtained sheet, degree of thickness unevenness during vacuum forming, heat seal strength, compression fusion properties,
The Izod impact value and flame retardancy were measured and the results are shown in Table 1. The measurement method is as follows. (1) Sheet surface gloss: The reflectance (%) of the light surface of the sheet was measured using a Murakami gloss meter at a reflection angle of 60°. (2) Thickness unevenness: depth 50mm from extruded sheet, bottom diameter
A cylindrical cup-shaped container with a diameter of 50 mm and a top surface diameter of 60 mm was vacuum formed, and the wall thickness of a cross section taken longitudinally through the center was measured, and the degree of wall unevenness was determined by dividing the maximum thickness by the minimum thickness (n = 3 ). (3) Heat-sealing strength: Create No. 1 dumbbell pieces from extrusion-molded sheets, stack the two sheets together, heat and pressurize them at 200℃ for 5 seconds with a heat sealer, then measure the peel strength under tensile load with Tensilon. The seal strength was defined as (Kg/cm ² ) (n=3). (4) Compression adhesion: Laminate the required number of 20cm square sheets to a thickness of 440mm, heat and press at 30Kg/cm ² x 190℃ x 10 minutes using a 30Ton press, cool and then cut along the plane passing through the center. The internal fusion properties were observed with the naked eye and evaluated as 〇-△-x. (5) Izot impact value (Kg・cm/cm): ASTM−
Compliant with D-256. (6) Flame retardant (UL-94 rank): Compliant with UL Subject94. 【table】

Claims

[Claims]

1 (A) 20 to 98 parts by weight of chlorinated vinyl chloride resin and (B)
(C) Vinyl acetate content 50 parts by weight for 100 parts by weight of a resin mixture of 2 to 80 parts by weight of rubber-nitrile or methacrylate monomer-styrene monomer copolymer
1. A chlorinated vinyl chloride resin sheet formed by molding a resin compound containing 0.5 to 50 parts by weight of an ethylene-vinyl acetate copolymer of more than 90% by weight.