JP2004323734A - Polyvinyl chloride composition and hose using the same - Google Patents
Polyvinyl chloride composition and hose using the same Download PDFInfo
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- JP2004323734A JP2004323734A JP2003121794A JP2003121794A JP2004323734A JP 2004323734 A JP2004323734 A JP 2004323734A JP 2003121794 A JP2003121794 A JP 2003121794A JP 2003121794 A JP2003121794 A JP 2003121794A JP 2004323734 A JP2004323734 A JP 2004323734A
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Abstract
Description
【０００１】
【発明の属する技術分野】
本発明は、用途によって臭気が問題となる塩化ビニル成形物及び例えばシャワーホースなどの給水・給湯用配管や水道用配管に適したホースに関する。
詳しくは、塩化ビニルと添加物を加熱溶融して所定の形状に成形される塩化ビニル組成物及び同組成物からなるホースに関する。
【０００２】
【従来の技術】
従来、この種のホースとして、所定厚さのポリオレフィン系樹脂からなる内層と、柔軟性を有する熱可塑性エラストマーまたは加硫ゴムからなる外層とからなる内面層チューブと、この外側を囲う補強層とからなり、この内面層チューブの外層中に存在する老化防止剤の含有量が、内層中に存在する老化防止剤の含有量の０．１〜５倍の範囲で含有することにより、水や湯中の規定された条件下における残留塩素の濃度を保ち、かつ、臭いや色がつくことを防ぐことのできるホースで、しかも従来の柔軟性を有した給水・給湯ホースの欠点であった耐塩素水性（耐カルキ性）を改善し、より長寿命の給水・給湯用ホースを提案している（例えば、特許文献１参照）。
【０００３】
【特許文献１】
特開平１０−２４６６号公報（第１〜２頁）
【０００４】
【発明が解決しようとする課題】
しかし乍ら、このような従来のホースで述べられた消臭技術は、一般的に広く普及している塩化ビニル製ホースなどの塩化ビニル組成物には適用できなかった。
一方、塩化ビニル製ホースの製造工程において、塩化ビニルの加工時に生じる独特の臭気を抜くために、ホース製造後に加熱炉でアニーリングすることにより、ホースを脱臭処理することも検討されているが、その反面において、ホースの内外径が小さくなったり、長さが短くなるなどの別な問題がある。
そこで、本願の発明者が塩化ビニル製ホースの臭気発生原因を研究したところ、ホースの加工時に塩化ビニル及び添加物の混合物を加熱溶解すると、塩化ビニルポリマーが熱分解して、例えばキシレン、トルエン、エチルベンゼンなどの揮発性有機溶剤などが発生し、これら揮発性有機溶剤と可塑剤の酸化臭が臭気の基になることが解った。
【０００５】
本発明のうち請求項１記載の発明は、臭気のない塩化ビニル成形物を添加物の追加のみで提供することを目的としたものである。
請求項２記載の発明は、請求項１に記載の発明の目的に加えて、臭気吸着機能を維持しながら外観不良による商品価値の低下を防止することを目的としたものである。
請求項３記載の発明は、臭気のない塩化ビニル製ホースを添加物の追加のみで提供することを目的としたものである。
【０００６】
【課題を解決するための手段】
前述した目的を達成するために、本発明のうち請求項１記載の発明は、塩化ビニルに添加物として適量のハイドロタルサイトを配合して、塩化ビニルポリマーの熱分解を抑えて揮発性有機溶剤などの発生を減じると共に、発生した揮発性有機溶剤などを吸着したことを特徴とするものである。
請求項２記載の発明は、請求項１記載の発明の構成に、前記塩化ビニル１００重量部に対し、ハイドロタルサイト１〜５重量部を配合して、塩化ビニルポリマーの熱分解を抑えると共に、揮発性有機溶剤などを吸着しながら、ハイドロタルサイトのブルーミングを抑えた構成を加えたことを特徴とする。
請求項３記載の発明は、請求項１または２記載の塩化ビニル組成物を円筒状に成形したことを特徴とする。
【０００７】
【作用】
請求項１の発明の作用は、塩化ビニルに適量のハイドロタルサイトを添加することにより、塩化ビニルポリマーの熱分解を抑えて揮発性有機溶剤などの発生が減少すると共に、発生した揮発性有機溶剤などが短時間に吸着されるものである。
請求項２の発明の作用は、請求項１記載の発明の作用に加えて、塩化ビニル１００重量部に対するハイドロタルサイトの添加量が１重量部未満の場合には、ビニルポリマーの熱分解の抑制及び揮発性有機溶剤などの吸着に十分な効果が得られず、これと逆に５重量部より多い場合には、ハイドロタルサイトのブルーミングが発生して、外観不良の原因となる。
請求項３の発明の作用は、添加物として適量のハイドロタルサイトが塩化ビニルに配合された塩化ビニル組成物を円筒状に成形することにより、塩化ビニルポリマーの熱分解を抑えて揮発性有機溶剤などの発生が減少すると共に、発生した揮発性有機溶剤などが短時間に吸着され、或いは塩化ビニル１００重量部に対し、ハイドロタルサイト１〜５重量部が配合された塩化ビニル組成物を円筒状に成形することにより、上記ビニルポリマーの熱分解の抑制及び揮発性有機溶剤などの吸着に十分な効果を得ながら、ハイドロタルサイトのブルーミングが抑えられる。
【０００８】
【発明の実施の形態】
以下、本発明の各実施例に基づいて説明する。
実施例１〜４では、可撓性がある塩化ビニル組成物及び同組成物からなるホースの場合を示し、これらは軟質塩化ビニルと添加物を加熱溶融して所定の形状に成形される。
【０００９】
塩化ビニルの添加物としては、例えばホースなどの製造時に使用する可塑剤や安定剤や着色剤などが従来周知な添加量で配合されると共に、適量のハイドロタルサイトを配合することにより、塩化ビニル及び添加物の混合物を加熱溶解した際に、塩化ビニルポリマーの熱分解を抑えて、例えばキシレン、トルエン、エチルベンゼンなどの揮発性有機溶剤などの発生を減じると共に、発生した揮発性有機溶剤などを吸着させる。
ここで、上記ハイドロタルサイトは、公知のハイドロタルサイト化合物などが含まれる。
【００１０】
実施例１には、塩化ビニル１００重量部に対し、ハイドロタルサイト０．５重量部を配合して、円筒状のホースを成形した。
【００１１】
実施例２には、塩化ビニル１００重量部に対し、ハイドロタルサイト２重量部を配合して、実施例１と同形状のホースを成形した。
【００１２】
実施例３には、塩化ビニル１００重量部に対し、ハイドロタルサイト３重量部を配合して、実施例１と同形状のホースを成形した。
【００１３】
実施例４には、塩化ビニル１００重量部に対し、ハイドロタルサイト５重量部を配合して、実施例１と同形状のホースを成形した。
【００１４】
更に比較例として、ハイドロタルサイトが全く添加されない実施例１〜４と同形状のホースを成形した。
【００１５】
そして、これら実施例１〜４及び比較例の臭気強度を、成形した日から４０日後までを測定した結果を図１のグラフに示す。
なお、この臭気測定には、測定機器としてカルモア社の臭い測定器「カルモアΣ」を使用した。
【００１６】
その結果、実施例２〜４は、その成形日から約一週間後に、臭気強度が１５０まで急激に低下し、約二週間後には比較例の約半分に近い、人が臭いを感じない臭気領域のである臭気強度ｌ００に達することが判明した。
【００１７】
即ち、ホースの場合は、その製造日から約二週間後に消費者へ届くように管理・流通すれば、消費者はホースの臭いを全く感じないことになる。
【００１８】
これに続いて、更にハイドロタルサイトの添加量が異なるホースを成形して測定した結果、塩化ビニル１００重量部に対するハイドロタルサイトの添加量が１重量部未満の場合には、塩化ビニルポリマーの熱分解の抑制及び揮発性有機溶剤などの吸着に十分な効果が得られないことが解った。
【００１９】
また、これと逆に塩化ビニル１００重量部に対するハイドロタルサイトの添加量が５重量部より多い場合には、ハイドロタルサイトのブルーミング（表面に析出）が発生して、外観不良の原因となることが解った。
【００２０】
一方、塩化ビニル組成物の臭気発生原因には、上述した塩化ビニルポリマーの熱分解による揮発性有機溶剤などの発生以外に可塑剤の酸化臭があり、この可塑剤の酸化を抑えるために酸化防止剤の添加にも注目して、ハイドロタルサイトと酸化防止剤の配合を様々に変更して脱臭効果を検証した。
【００２１】
具体的には、実施例５（塩化ビニル１００重量部に対し、酸化防止剤０．５重量部を配合したもの）と、実施例６（塩化ビニル１００重量部に対し、ハイドロタルサイト０．５重量部と酸化防止剤０．５重量部を配合したもの）を用意し、これらと上述した実施例２（塩化ビニル１００重量部に対し、ハイドロタルサイト２重量部を配合したもの）及び比較例（ハイドロタルサイトが全く添加されないもの）の臭気強度を、成形した日から４０日後までを測定した結果を図２のグラフに示す。
【００２２】
その結果、酸化防止剤が添加された実施例５及び実施例６は、酸化防止剤が添加されずにハイドロタルサイトのみが添加された実施例２より臭気強度が高いため、ハイドロタルサイトだけで十分な脱臭効果が得られることが判明した。
【００２３】
その理由は必ずしも明確ではないが、ハイドロタルサイトは層状複酸化物の無機材料で、一般的には医薬品として制酸剤や光触媒の吸着材などに利用されるものであるが、塩化ビニル組成物の場合には可塑剤の酸化を抑える酸化防止剤としての機能をも併せ持ちながら、塩化ビニルポリマーの熱分解を抑えて揮発性有機溶剤などの発生を減じると共に、発生した揮発性有機溶剤などを短時間に吸着しているものと考えられる。
【００２４】
尚、前示実施例では、可撓性がある塩化ビニル組成物からなるホースの場合のみを示したが、これに限定されず、例えばシートやそれ以外の可撓性を特徴とした成形品であれば有効である。
また、可撓性のない硬質塩化ビニルからなる塩化ビニル組成物についても同様なことが言える。
【００２５】
更に、ホースの構造について詳しく説明しなかったが、内層と外層の間に補強層としてブレード（補強糸）を螺旋状に巻き付け一体化した積層ホース（ブレードホース）や、不透明な内層と透明な外層との間に補強材として、少なくとも表面が金属色に光る断面矩形の帯状補強材と、断面円形の線状補強材を螺旋状に巻き付けて一体化した螺旋補強ホース（フォーランホース）に限らず、それ以外に外層と内層との間に、断面矩形の帯状補強材及び断面円形の線状補強材のどちらか一方のみを巻き付けて一体化したり、例えばガラス繊維や難燃性繊維などの糸状補強材を編組したり、螺旋状に巻き付けて一体化した従来周知の軟質ホースか、或いは単層構造のものなど、その構造に関係なく同様な消臭結果が得られる。
【００２６】
【発明の効果】
以上説明したように、本発明のうち請求項１記載の発明は、塩化ビニルに適量のハイドロタルサイトを添加することにより、塩化ビニルポリマーの熱分解を抑えて揮発性有機溶剤などの発生が減少すると共に、発生した揮発性有機溶剤などが短時間に吸着されるので、臭気のない塩化ビニル成形物を添加物の追加のみで提供できる。
従って、製造後に加熱炉でアニーリングして脱臭処理を行う従来のものに比べ、製造後の処理が必要なくて製造コストの低減化が図れる。
【００２７】
請求項２の発明は、請求項１の発明の効果に加えて、塩化ビニル１００重量部に対するハイドロタルサイトの添加量が１重量部未満の場合には、ビニルポリマーの熱分解の抑制及び揮発性有機溶剤などの吸着に十分な効果が得られず、これと逆に５重量部より多い場合には、ハイドロタルサイトのブルーミングが発生して、外観不良の原因となるので、臭気吸着機能を維持しながら外観不良による商品価値の低下を防止できる。
【００２８】
請求項３の発明は、請求項１または２の発明の効果に加えて、添加物として適量のハイドロタルサイトが塩化ビニルに配合された塩化ビニル組成物を円筒状に成形することにより、塩化ビニルポリマーの熱分解を抑えて揮発性有機溶剤などの発生が減少すると共に、発生した揮発性有機溶剤などが短時間に吸着され、或いは塩化ビニル１００重量部に対し、ハイドロタルサイト１〜５重量部が配合された塩化ビニル組成物を円筒状に成形することにより、上記ビニルポリマーの熱分解の抑制及び揮発性有機溶剤などの吸着に十分な効果を得ながら、ハイドロタルサイトのブルーミングが抑えられるので、臭気のない塩化ビニル製ホースを添加物の追加のみで提供できる。
従って、ホース製造後に加熱炉でアニーリングしてホースの脱臭処理を行う従来のものに比べ、ホースの内外径が小さくなったり、長さが短くなるなどの消臭以外が発生せず、例えばシャワーホースなどの給水・給湯用配管や水道用配管として好適に使用できる。
【図面の簡単な説明】
【図１】本発明のホースの臭気測定結果を示すグラフである。
【図２】酸化防止剤を添加した場合の臭気測定結果を示すグラフである。[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a vinyl chloride molded product having an odor problem depending on the use, and a hose suitable for water supply / hot water supply piping such as a shower hose or water supply piping.
More specifically, the present invention relates to a vinyl chloride composition formed by heating and melting vinyl chloride and an additive into a predetermined shape, and a hose comprising the composition.
[0002]
[Prior art]
Conventionally, as a hose of this type, an inner layer made of a polyolefin resin having a predetermined thickness, an inner layer tube made of an outer layer made of a thermoplastic elastomer or vulcanized rubber having flexibility, and a reinforcing layer surrounding the outer layer. The content of the anti-aging agent present in the outer layer of the inner surface layer tube is in the range of 0.1 to 5 times the content of the anti-aging agent present in the inner layer. Hose that can maintain the concentration of residual chlorine under the specified conditions and prevent odor and coloration, and is a drawback of conventional flexible water and hot water supply hoses. There has been proposed a water supply / hot water supply hose having improved (calcium resistance) and a longer life (see, for example, Patent Document 1).
[0003]
[Patent Document 1]
JP-A-10-2466 (pages 1-2)
[0004]
[Problems to be solved by the invention]
However, the deodorizing technique described in the conventional hose cannot be applied to a vinyl chloride composition such as a vinyl chloride hose which is generally widely used.
On the other hand, in the process of manufacturing a hose made of vinyl chloride, it has been studied to deodorize the hose by annealing it in a heating furnace after manufacturing the hose in order to remove the unique odor generated during processing of vinyl chloride. On the other hand, there is another problem that the inner and outer diameters of the hose become smaller and the length becomes shorter.
Therefore, the inventors of the present application studied the cause of odor generation of a vinyl chloride hose, and found that when a mixture of vinyl chloride and additives was heated and dissolved during hose processing, the vinyl chloride polymer was thermally decomposed, for example, xylene, toluene, Volatile organic solvents such as ethylbenzene were generated, and it was found that the oxidized odor of these volatile organic solvents and plasticizers became the odor base.
[0005]
An object of the present invention is to provide a vinyl chloride molded article having no odor by only adding an additive.
A second aspect of the present invention has an object to prevent a reduction in commercial value due to poor appearance while maintaining an odor absorbing function, in addition to the object of the first aspect of the present invention.
The third object of the present invention is to provide a vinyl chloride hose having no odor by only adding an additive.
[0006]
[Means for Solving the Problems]
In order to achieve the above-mentioned object, the invention according to claim 1 of the present invention is characterized in that a suitable amount of hydrotalcite is added to vinyl chloride as an additive to suppress the thermal decomposition of a vinyl chloride polymer and to form a volatile organic solvent. It is characterized in that the generation of the organic solvent is reduced and the generated volatile organic solvent and the like are adsorbed.
The invention according to claim 2 is characterized in that the composition of the invention according to claim 1 is mixed with 1 to 5 parts by weight of hydrotalcite with respect to 100 parts by weight of the vinyl chloride to suppress thermal decomposition of the vinyl chloride polymer, It is characterized by adding a configuration that suppresses blooming of hydrotalcite while adsorbing volatile organic solvents and the like.
The invention according to claim 3 is characterized in that the vinyl chloride composition according to claim 1 or 2 is formed into a cylindrical shape.
[0007]
[Action]
The effect of the invention of claim 1 is that by adding an appropriate amount of hydrotalcite to vinyl chloride, the thermal decomposition of the vinyl chloride polymer is suppressed, the generation of volatile organic solvents and the like are reduced, and the generated volatile organic solvent is generated. Is adsorbed in a short time.
The effect of the invention of claim 2 is that, in addition to the effect of the invention of claim 1, when the addition amount of hydrotalcite to 100 parts by weight of vinyl chloride is less than 1 part by weight, the thermal decomposition of the vinyl polymer is suppressed. On the other hand, if the effect is not sufficient for the adsorption of volatile organic solvents and the like, and if the amount is more than 5 parts by weight, blooming of hydrotalcite occurs, causing poor appearance.
The effect of the invention of claim 3 is that, by molding a vinyl chloride composition in which an appropriate amount of hydrotalcite is blended into vinyl chloride as an additive, the thermal decomposition of the vinyl chloride polymer is suppressed and the volatile organic solvent is formed. In addition, the generation of volatile organic solvents and the like are reduced in a short time, or the vinyl chloride composition containing 1 to 5 parts by weight of hydrotalcite is mixed with 100 parts by weight of vinyl chloride. By molding into such a shape, blooming of hydrotalcite can be suppressed while obtaining a sufficient effect for suppressing the thermal decomposition of the vinyl polymer and adsorbing a volatile organic solvent.
[0008]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, description will be made based on each embodiment of the present invention.
Examples 1 to 4 show the case of a flexible vinyl chloride composition and a hose made of the same, which are formed into a predetermined shape by heating and melting soft vinyl chloride and additives.
[0009]
As an additive of vinyl chloride, for example, a plasticizer, a stabilizer, a colorant, and the like used in the manufacture of hoses and the like are added in a conventionally well-known addition amount, and by adding an appropriate amount of hydrotalcite, vinyl chloride is added. When the mixture of additives is heated and dissolved, the thermal decomposition of the vinyl chloride polymer is suppressed to reduce the generation of volatile organic solvents such as xylene, toluene, and ethylbenzene, and to absorb the generated volatile organic solvents. Let it.
Here, the hydrotalcite includes a known hydrotalcite compound and the like.
[0010]
In Example 1, 0.5 parts by weight of hydrotalcite was blended with 100 parts by weight of vinyl chloride to form a cylindrical hose.
[0011]
In Example 2, 2 parts by weight of hydrotalcite was blended with 100 parts by weight of vinyl chloride to form a hose having the same shape as in Example 1.
[0012]
In Example 3, 3 parts by weight of hydrotalcite was blended with 100 parts by weight of vinyl chloride to form a hose having the same shape as in Example 1.
[0013]
In Example 4, 5 parts by weight of hydrotalcite was blended with 100 parts by weight of vinyl chloride to form a hose having the same shape as in Example 1.
[0014]
Further, as comparative examples, hoses having the same shape as those of Examples 1 to 4 to which no hydrotalcite was added were formed.
[0015]
And the result of having measured the odor intensity | strength of these Examples 1-4 and a comparative example from the molding day to 40 days after is shown in the graph of FIG.
In this odor measurement, an odor measuring device “Calmore II” manufactured by Calmore was used as a measuring device.
[0016]
As a result, in Examples 2 to 4, the odor intensity was sharply reduced to 150 after about one week from the molding date, and after about two weeks, it was close to about half of the comparative example. It was found that the odor intensity reached 100.
[0017]
That is, in the case of a hose, if the hose is managed and distributed so as to reach the consumer about two weeks after the date of manufacture, the consumer will not feel the smell of the hose at all.
[0018]
Subsequently, a hose having a different amount of hydrotalcite added was molded and measured. As a result, when the amount of hydrotalcite added was less than 1 part by weight per 100 parts by weight of vinyl chloride, the heat of the vinyl chloride polymer was reduced. It has been found that a sufficient effect on suppression of decomposition and adsorption of volatile organic solvents and the like cannot be obtained.
[0019]
Conversely, if the amount of hydrotalcite added is more than 5 parts by weight based on 100 parts by weight of vinyl chloride, blooming of hydrotalcite (precipitation on the surface) occurs, which causes poor appearance. I understand.
[0020]
On the other hand, the cause of the odor of the vinyl chloride composition is not only the above-mentioned generation of the volatile organic solvent due to the thermal decomposition of the vinyl chloride polymer, but also the oxidation odor of the plasticizer. Paying attention to the addition of the agent, the composition of hydrotalcite and antioxidant was variously changed, and the deodorizing effect was verified.
[0021]
Specifically, Example 5 (containing 0.5 part by weight of an antioxidant with respect to 100 parts by weight of vinyl chloride) and Example 6 (containing 0.5 part by weight of hydrotalcite with respect to 100 parts by weight of vinyl chloride). Parts by weight and 0.5 parts by weight of an antioxidant) were prepared, and these were mixed with the above-mentioned Example 2 (100 parts by weight of vinyl chloride and 2 parts by weight of hydrotalcite) and Comparative Example FIG. 2 is a graph showing the results of measuring the odor intensity of (without adding any hydrotalcite) from the day of molding to 40 days later.
[0022]
As a result, in Examples 5 and 6 in which an antioxidant was added, the odor intensity was higher than that in Example 2 in which only hydrotalcite was added without adding an antioxidant. It has been found that a sufficient deodorizing effect can be obtained.
[0023]
Although the reason is not always clear, hydrotalcite is a layered double oxide inorganic material, which is generally used as a pharmaceutical product in antacids and photocatalytic adsorbents. In this case, while also functioning as an antioxidant that suppresses the oxidation of the plasticizer, it suppresses the thermal decomposition of the vinyl chloride polymer to reduce the generation of volatile organic solvents and reduce the amount of volatile organic solvents generated. It is considered that it was adsorbed at time.
[0024]
In the above-described examples, only the case of a hose made of a flexible vinyl chloride composition is shown. However, the present invention is not limited to this. For example, a sheet or other molded article characterized by flexibility may be used. If it is, it is effective.
The same can be said for a vinyl chloride composition made of inflexible hard vinyl chloride.
[0025]
Furthermore, although the structure of the hose was not described in detail, a laminated hose (blade hose) in which a braid (reinforcing yarn) was spirally wound as a reinforcing layer between the inner layer and the outer layer, or an opaque inner layer and a transparent outer layer The reinforcing material is not limited to a band-shaped reinforcing material having a rectangular section in which at least the surface shines in a metallic color, and a spiral reinforcing hose (for-run hose) in which a linear reinforcing material having a circular section is spirally wound and integrated. In addition, between the outer layer and the inner layer, only one of the band-shaped reinforcing material having a rectangular cross-section and the linear reinforcing material having a circular cross-section are wound and integrated, or a thread-like reinforcing material such as glass fiber or flame-retardant fiber is used. Similar deodorization results can be obtained regardless of the structure, such as a conventionally known soft hose in which a material is braided or spirally wound and integrated, or a single-layer structure.
[0026]
【The invention's effect】
As described above, the invention according to claim 1 of the present invention suppresses the thermal decomposition of the vinyl chloride polymer by adding an appropriate amount of hydrotalcite to vinyl chloride and reduces the generation of volatile organic solvents and the like. In addition, since the generated volatile organic solvent and the like are adsorbed in a short time, a vinyl chloride molded article having no odor can be provided only by adding an additive.
Therefore, as compared with the conventional method in which annealing is performed in a heating furnace to perform deodorization after production, post-production processing is not required, and the production cost can be reduced.
[0027]
The invention of claim 2 provides the effect of the invention of claim 1, and furthermore, when the addition amount of hydrotalcite to 100 parts by weight of vinyl chloride is less than 1 part by weight, suppression of thermal decomposition of the vinyl polymer and volatility If the effect of adsorbing organic solvents is not sufficient, and if the amount is more than 5 parts by weight, blooming of hydrotalcite occurs and causes poor appearance, so the odor adsorbing function is maintained. In addition, it is possible to prevent a decrease in commercial value due to poor appearance.
[0028]
The invention of claim 3 provides, in addition to the effects of the invention of claim 1 or 2, a vinyl chloride composition in which an appropriate amount of hydrotalcite is blended with vinyl chloride as an additive to form a vinyl chloride. The thermal decomposition of the polymer is suppressed to reduce the generation of volatile organic solvents, etc., and the generated volatile organic solvents are adsorbed in a short time, or 1 to 5 parts by weight of hydrotalcite per 100 parts by weight of vinyl chloride. By molding the vinyl chloride composition in which is blended into a cylindrical shape, the blooming of hydrotalcite can be suppressed while suppressing the thermal decomposition of the vinyl polymer and obtaining a sufficient effect on adsorption of volatile organic solvents and the like. A odor-free PVC hose can be provided only by adding additives.
Therefore, as compared with the conventional method in which the hose is annealed in a heating furnace to deodorize the hose after the hose is manufactured, there is no deodorization such as a reduction in the inner and outer diameters of the hose and a decrease in the length. It can be suitably used as water supply / hot water supply piping or water supply piping.
[Brief description of the drawings]
FIG. 1 is a graph showing the results of measuring the odor of the hose of the present invention.
FIG. 2 is a graph showing odor measurement results when an antioxidant is added.
Claims (3)
前記塩化ビニルに添加物として適量のハイドロタルサイトを配合して、塩化ビニルポリマーの熱分解を抑えて揮発性有機溶剤などの発生を減じると共に、発生した揮発性有機溶剤などを吸着したことを特徴とする塩化ビニル組成物。In a vinyl chloride composition molded into a predetermined shape by heating and melting vinyl chloride and additives,
A suitable amount of hydrotalcite is added to the vinyl chloride as an additive to suppress the thermal decomposition of the vinyl chloride polymer to reduce the generation of volatile organic solvents and the like, and adsorb the generated volatile organic solvents and the like. Vinyl chloride composition.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003121794A JP2004323734A (en) | 2003-04-25 | 2003-04-25 | Polyvinyl chloride composition and hose using the same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2003121794A JP2004323734A (en) | 2003-04-25 | 2003-04-25 | Polyvinyl chloride composition and hose using the same |
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| JP2004323734A true JP2004323734A (en) | 2004-11-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| JP2003121794A Pending JP2004323734A (en) | 2003-04-25 | 2003-04-25 | Polyvinyl chloride composition and hose using the same |
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| JP (1) | JP2004323734A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111019266A (en) * | 2019-12-25 | 2020-04-17 | 上海新上化高分子材料有限公司 | Permanent low-odor PVC plastic and preparation method thereof |
| US11773235B2 (en) | 2020-05-13 | 2023-10-03 | Exxonmobil Chemical Patents Inc. | Low odor and volatiles polyolefin compositions and methods of production |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN111019266A (en) * | 2019-12-25 | 2020-04-17 | 上海新上化高分子材料有限公司 | Permanent low-odor PVC plastic and preparation method thereof |
| US11773235B2 (en) | 2020-05-13 | 2023-10-03 | Exxonmobil Chemical Patents Inc. | Low odor and volatiles polyolefin compositions and methods of production |
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