KR20100012480A - A poly vinyl chloride pipe and a joint pipe - Google Patents

A poly vinyl chloride pipe and a joint pipe Download PDF

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Publication number
KR20100012480A
KR20100012480A KR1020080073888A KR20080073888A KR20100012480A KR 20100012480 A KR20100012480 A KR 20100012480A KR 1020080073888 A KR1020080073888 A KR 1020080073888A KR 20080073888 A KR20080073888 A KR 20080073888A KR 20100012480 A KR20100012480 A KR 20100012480A
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South Korea
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polyvinyl chloride
weight
parts
pipe
chloride resin
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KR1020080073888A
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Korean (ko)
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곽종국
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곽종국
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Priority to KR1020080073888A priority Critical patent/KR20100012480A/en
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    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/34—Silicon-containing compounds
    • C08K3/346—Clay
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L27/00—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers
    • C08L27/02—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L27/04—Compositions of homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by a halogen; Compositions of derivatives of such polymers not modified by chemical after-treatment containing chlorine atoms
    • C08L27/06—Homopolymers or copolymers of vinyl chloride
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
    • F16L9/00—Rigid pipes
    • F16L9/12—Rigid pipes of plastics with or without reinforcement
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
    • C08K3/00—Use of inorganic substances as compounding ingredients
    • C08K3/18—Oxygen-containing compounds, e.g. metal carbonyls
    • C08K3/24—Acids; Salts thereof
    • C08K3/26—Carbonates; Bicarbonates
    • C08K2003/265—Calcium, strontium or barium carbonate
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/08—Stabilised against heat, light or radiation or oxydation
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/18—Applications used for pipes

Abstract

PURPOSE: An environment-friendly poly vinyl chloride pipe and a joint pipe are provided to ensure excellent mechanical properties and physical properties such as high tensile strength and shock resistance, and to improve durability and marketability. CONSTITUTION: An environment-friendly poly vinyl chloride pipe and a joint pipe are prepared by a polyvinyl chloride resin composition. The polyvinyl chloride resin composition comprises polyvinyl chloride resin 100.0 parts by weight, yellow soil 5~45 parts by weight, light carbon(CaCo3) 8~25 parts by weight, compound stabilizer 2~3 parts by weight and impact reinforcer 6~8 parts by weight.

Description

폴리염화비닐 파이프 및 파이프 이음관 { A POLY VINYL CHLORIDE PIPE AND A JOINT PIPE }Polyvinyl chloride pipes and pipe fittings {A POLY VINYL CHLORIDE PIPE AND A JOINT PIPE}

본 발명은 상수도관나 하수도관으로 주로 사용되는 폴리염화비닐 파이프 및 파이프 이음관에 관한 것으로, 더 자세하게는 폴리염화비닐 수지 조성물에 환경 친화적 물질인 황토가 적정량 함유되도록 한 것에 관한 것이다.The present invention relates to a polyvinyl chloride pipe and a pipe fitting pipe mainly used as a water supply pipe or a sewage pipe, and more particularly, to an appropriate amount of ocher, which is an environmentally friendly substance, is contained in the polyvinyl chloride resin composition.

본 발명이 관계하는 폴리염화비닐((PVC; Poly Vinyl Chloride)은 염화비닐의 단독중합체 및 염화비닐을 50％ 이상 함유한 혼성중합체(混成重合體)를 일컫는 것이다.Polyvinyl chloride ((PVC; Polyvinyl Chloride)) to which the present invention relates refers to a homopolymer of vinyl chloride and a copolymer containing 50% or more of vinyl chloride.

폴리염화비닐은 결정성이 낮고, 가공시 접착이 어려운 특징이 있으며, 연질 제품으로서 포장용·농업용 등의 시트나 필름에 사용되고, 경질 제품에서는 압출성형에 의한 수도관의 제조 등에 쓰이고 있다.Polyvinyl chloride is characterized by low crystallinity, difficult adhesion during processing, and is used as a soft product in sheets and films for packaging and agriculture, and in the production of water pipes by extrusion molding in hard products.

상기 폴리염화비닐 레진을 주원료로 하는 폴리염화비닐 수지 조성물은 폴리염화비닐 레진 100중량％에 대한 일정비율의 안정제, 충전제, 가공조제, 안료, 그 밖의 첨가물로 조성된다.The polyvinyl chloride resin composition containing the polyvinyl chloride resin as a main raw material is composed of a stabilizer, a filler, a processing aid, a pigment, and other additives in a proportion to 100% by weight of polyvinyl chloride resin.

본 발명은 상기와 같은 종래의 실정을 감안하여 안출한 것이며, 그 목적이 높은 인장강도 및 내충격성 등의 물리적 특성 및 기계적 특성이 우수하고, 인체에 유익하며, 환경친화적인 폴리염화비닐 파이프 및 파이프 이음관을 제공하는 데에 있는 것이다.The present invention has been devised in view of the above-described conventional situation, and the object thereof is excellent in physical and mechanical properties such as high tensile strength and impact resistance, and is beneficial to human body, and is environmentally friendly polyvinyl chloride pipe and pipe. It is to provide a joint pipe.

본 발명은 상기의 목적을 달성하기 위하여 폴리염화비닐 파이프 및 파이프 이음관에 일정량의 황토가 함유되도록 하는 것을 특징으로 한다.The present invention is characterized in that a certain amount of loess is contained in the polyvinyl chloride pipe and pipe fittings to achieve the above object.

즉, 본 발명의 폴리염화비닐 파이프 및 파이프 이음관은 폴리염화비닐 레진 100 중량부에 대하여 황토 5∼45 중량부, 경탄(CaCo3) 8∼25 중량부, 복합안정제 2∼3 중량부, 충격보강제 6∼8 중량부를 함유하는 폴리염화비닐 수지 조성물로 제조한 것이다.That is, the polyvinyl chloride pipes and pipe fittings of the present invention is based on 100 parts by weight of polyvinyl chloride resin 5 to 45 parts by weight of ocher, 8 to 25 parts by weight of hard coal (CaCo 3 ), 2-3 parts by weight of composite stabilizer, impact It is manufactured from the polyvinyl chloride resin composition containing 6-8 weight part of reinforcing agents.

본 발명의 폴리염화비닐 파이프 및 파이프 이음관은 환경 친화적인 황토가 함유되어 높은 인장강도 및 내충격성 등의 우수한 물리적 특성 및 기계적 특성을 발휘할 수 있게 되므로 본 발명에 의하면 폴리염화비닐 파이프 및 파이프 이음관의 내구성 및 상품성을 크게 향상시킬 수 있게 되는 등의 효과를 얻을 수 있게 된다.According to the present invention, polyvinyl chloride pipes and pipe fittings according to the present invention can contain environmentally friendly loess and exhibit excellent physical and mechanical properties such as high tensile strength and impact resistance. It is possible to obtain effects such as greatly improving the durability and the commercial property of the.

이하 본 발명의 구체적인 기술내용을 더욱 자세히 설명하면 다음과 같다.Hereinafter, the technical details of the present invention will be described in more detail.

본 발명의 폴리염화비닐 파이프 및 파이프 이음관은 폴리염화비닐 레진 100 중량부에 대하여 황토 5∼45 중량부, 경탄(CaCo3) 8∼25 중량부, 복합안정제 2∼3 중량부, 충격보강제 6∼8 중량부를 함유하는 폴리염화비닐 수지 조성물에 의해 제조된 것이다.Polyvinyl chloride pipes and pipe fittings of the present invention is based on 100 parts by weight of polyvinyl chloride resin, 5 to 45 parts by weight of ocher, 8 to 25 parts by weight of hard coal (CaCo 3 ), 2 to 3 parts by weight of composite stabilizer, impact modifier 6 It is manufactured by the polyvinyl chloride resin composition containing -8 weight part.

본 발명의 폴리염화비닐 파이프 및 파이프 이음관의 구성 성분 중에서 황토는 다량의 탄산칼슘(CaCo3)을 가지고 있으며, 이 탄산칼슘에 의해 쉽게 부서지지 않는 점착력을 지닌다.Among the components of the polyvinyl chloride pipes and pipe fittings of the present invention, ocher has a large amount of calcium carbonate (CaCo 3 ), and has an adhesive force not easily broken by the calcium carbonate.

상기 황토는 실리카(SIO2), 알루미나(Al2O3), 철분, 마그네슘(Mg), 나트륨(Na), 칼리 등으로 구성되며, 이러한 성분비와 다양한 효소들로 조성되어 동-식물의 성장에 꼭 필요한 원적외선을 다량 방사한다.The loess is composed of silica (SIO 2 ), alumina (Al 2 O 3 ), iron, magnesium (Mg), sodium (Na), kali, etc., composed of such a ratio and various enzymes for the growth of animals and plants Emits a lot of far-infrared rays that are absolutely necessary.

또한 황토는 표면이 넓은 벌집구조로 수많은 공간이 복층구조를 이루고 있고, 이 스폰지 같은 구멍안에는 원적외선이 다량 흡수, 저장되어 있어 열을 받으면 발산하여 다른 물체의 분자활동을 자극한다In addition, ocher is a honeycomb structure with a large surface, and a large number of spaces have a multi-layered structure. In this sponge-like hole, a lot of far-infrared rays are absorbed and stored.

황토 한 스푼에는 약 2억 마리의 미생물이 살고 있어 다양한 효소들이 순환 작용을 일으키며, 황토의 효소 성분에는 카탈라아제, 디페놀 옥시다아제, 사카라제, 프로테아제의 4가지가 포함되어 있고, 이 효소들은 각기 독소 제거, 분해력, 비료 요소, 정화 작용의 역할을 한다.A spoonful of ocher contains about 200 million microorganisms, causing various enzymes to circulate. The enzyme component of ocher contains four types of catalase, diphenol oxidase, saccharase, and protease. It acts as a decomposing power, fertilizer element, and purification.

일반적으로 널리 알려진 황토의 인체에 대한 효능으로는 혈액을 촉진시키고 신진대사를 왕성하게 하는 것 외에도 관절염, 근육통, 요통, 자율신경 실조증(교통 사고 후유증)에 좋으며, 체내 노폐물을 분해하고 자정능력이 있어 피부미용에 좋으며, 체내 독소를 제거하고 통증을 완화한다는 것을 들 수 있다.In general, the well-known ocher's effect on the human body is good for arthritis, myalgia, low back pain, autonomic ataxia (aftermath of traffic accident), in addition to promoting blood and boosting metabolism. It is good for skin beauty, removes toxins and relieves pain.

이러한 효능의 황토를 함유하는 제품은 인체에 크게 유익하게 됨은 물론이며, 참고적으로 우리의 전통식품인 된장, 간장, 고추장 등이 적당히 발효되어 맛을 내는 이유는 황토로 제작된 옹기가 숨을 쉬기 때문이다.The products containing ocher of such efficacy are greatly beneficial to the human body, and for reference, our traditional foods, such as doenjang, soy sauce, and red pepper paste, are fermented and tasted properly. Because.

상기 황토옹기는 강력한 제독작용을 하여 음식의 독성을 제거하고 숨구멍이 있어서 저장된 음식이 오래되면 나쁜 기를 밖으로 밀어내 고유의 영양가를 유지, 보존하게 된다.The ocher group is a strong detoxification action to remove the toxicity of food and the pores are stored in the old food to push out the bad group to maintain its intrinsic nutritional value.

본 발명의 폴리염화비닐 파이프 및 파이프 이음관의 구성 성분 중에서 복합안정제는 낮은 납(Pb) 함량을 가진 열안정제와 활제를 균일하게 혼합한 LG화학의 KN-500 제품을 사용할 수 있다.Among the components of the polyvinyl chloride pipe and pipe fittings of the present invention, the composite stabilizer may be a product of LG Chem's KN-500, which is a uniform mixture of a thermal stabilizer and a lubricant having a low lead (Pb) content.

상기 복합안정제는 충진제 또는 안료의 변화에 의해 발생되는 대부분의 결점을 흡수할 수 있도록 전체 공정에 유연성을 향상시키므로 어떤 극단적인 경우를 제외하고는 어떤 여분의 활제를 추가할 필요가 없다.The complex stabilizer improves flexibility in the overall process to absorb most of the defects caused by changes in fillers or pigments, so there is no need to add any extra lubricants under certain extreme cases.

한편 폴리염화비닐 수지는 강직하고 내유성이 강한 반면 가공이 어려우므로 가공을 돕기 위해 가공조제를 사용할 수 있으며, 본 발명의 폴리염화비닐 파이프를 제조할 때에 가공조제는 특히 아크릴레이트계 단량체를 유화중합한 제품을 사용할 수 있다.On the other hand, polyvinyl chloride resin is rigid and strong oil resistance, but difficult to process, processing aids can be used to assist processing, the processing aid is especially emulsified and polymerized acrylate monomers when manufacturing the polyvinyl chloride pipe of the present invention The product can be used.

충격보강제는 본래 분열, 인장, 압축, 휨, 충격 강도를 증가시키기 위해 폴리염화비닐 레진에 첨가하는 섬유상 불용성 물질이며, 충격보강제의 첨가를 통해 치수 안정성과 열변형에 대한 저항력의 증진을 기대할 수 있다.Impact modifiers are inherently fibrous insoluble materials added to polyvinyl chloride resins to increase fracture, tensile, compression, warpage, and impact strength, and the addition of impact modifiers is expected to increase dimensional stability and resistance to thermal deformation. .

대부분의 폴리염화비닐(PVC)은 구조적으로 내충격성, 가공유동성, 내열변형 등이 취약했기 때문에 상업화를 위해서 첨가제 개발에 의한 물성 및 가공성 향상이 뒷받침되어야 한다.Since most polyvinyl chloride (PVC) is structurally weak in impact resistance, processing fluidity, and heat deformation, it should be supported for improvement of physical properties and processability by developing additives for commercialization.

폴리염화비닐 충격보강제는 일반적으로 경질 폴리염화비닐 레진에 첨가하여 내충격성 보강에 적용되며, 충격보강제는 성분에 따라 다음의 3가지로 분류된다.Polyvinyl chloride impact modifiers are generally applied to impact resistance reinforcement by adding them to hard polyvinyl chloride resins, and impact modifiers are classified into three types according to the components.

첫째, 폴리염화비닐(PVC) 충격보강제로 사용되고 있는 것은 그라프트 중합된 고분자 고무계로, 예를 들면 메타크리레이트 부타디엔 스틸렌(Methacrylate butadiene styrene ; MBS), 아크릴(Acrylic), 아크릴로니트릴 부타디엔 스틸렌 3량체(Acrylonitrile butadiene styrene terpolymer; ABS) 등이 있다.First, polyvinyl chloride (PVC) impact modifiers are graft polymerized polymer rubbers, for example, methacrylate butadiene styrene (MBS), acrylic and acrylonitrile butadiene styrene trimers. (Acrylonitrile butadiene styrene terpolymer; ABS).

둘째, 가소화 고분자로 염소처리된 폴리에틸렌(Chlorinated Poly Ethylene; CPE), 에틸렌 비닐 아세테이트(Ethene vinyl acetate; EVA) 등이 있고, 이들은 1개 상의 폴리머형태를 가지고 있다.Second, there are chlorinated polyethylene (CPE) and ethylene vinyl acetate (EVA) as plasticizing polymers, and they have one phase of polymer form.

셋째, 무기계로 탄산칼슘에 스테아린으로 코팅한 무기 내충격개질제가 있다.Third, there is an inorganic impact modifier coated with stearin on calcium carbonate as an inorganic system.

상기 충격보강제 개발동향을 보면, 50년대초에는 ABS가 폴리염화비닐 충격보강제로 사용되었으나 50년대 후반에는 롬과 하스(Rohm ＆ Haas)에 의해 메타크리레이트 부타디엔 스틸렌(MBS) 계 충격보강제가 개발되어 대체되기 시작했으며, 60년대 들어 미국과 유럽 등지에서 PVC 용기(bottle)와 포장재 시장이 급격히 성장함에 따라 일본에서는 가네가푸치(Kanegafuchi)가 MBS, MABS 등의 충격보강제를 개발했다.According to the development trend of the impact modifier, ABS was used as a polyvinyl chloride impact modifier in the early 50s, but in the late 50s, methacrylate butadiene styrene (MBS) impact modifier was developed by Rohm & Haas. As the PVC bottle and packaging market grew rapidly in the US and Europe in the 1960s, Kanegafuchi developed impact modifiers such as MBS and MABS in Japan.

70년대에는 독일을 필두로 보온성이 우수한 창호시장이 형성되면서 Rohm ＆ Haask 내후성 및 내충격성이 우수한 아크릴계 충격보강제를, DOW가 HDPE공정을 변형한 CPE를 개발하기에 이르렀다.In the 70's, with the formation of a window market with excellent thermal insulation, led by Germany, DOW developed CPE, an acrylic impact modifier with excellent Rohm & Haask weather resistance and impact resistance.

MBS계는 PVC 충격보강제의 대표적 수지로 불투명용(고충격용), 투명용, 무백화 등으로 구분된다.MBS is a typical resin of PVC impact modifiers and is divided into opaque (high impact), transparent, and whitening.

메타크리레이트 부타디엔 스틸렌(Methacrylate butadiene styrene; MBS)은 디엔(Diene) 계 고무에 MMA 와 SM을 그래프트화시켜 얻어지는 공중합체로 경질과 반경질 PVC 제품에 사용돼 충격강도를 향상시키고 가공성을 촉진시키는 역할을 한다.Methacrylate butadiene styrene (MBS) is a copolymer obtained by grafting MMA and SM to diene rubber, which is used in hard and semi-rigid PVC products to improve impact strength and promote processability. Do it.

아크릴계는 BA, MMA, SM을 원료로 생산되며 MBS계는 SBR, MMA, SM을 이용해 생산하고 가공조제는 MMA를 이용하고 있다.Acrylic is produced from BA, MMA, SM, MBS is produced using SBR, MMA, SM and processing aids are using MMA.

본 발명의 폴리염화비닐 파이프 및 파이프 이음관을 제조하는 데에 사용되는 폴리염화비닐 수지 조성물에서는 MBS계 충격보강제를 사용할 수 있다.In the polyvinyl chloride resin composition used for producing the polyvinyl chloride pipe and pipe fitting tube of the present invention, an MBS-based impact modifier may be used.

본 발명의 폴리염화비닐 파이프 및 파이프 이음관을 제조하는 데에 사용되는 폴리염화비닐 수지 조성물에서는 상기의 구성성분이외에 착색제, 충진제, 대전방지제 등과 같은 부가적인 성분들을 목적하는 물성에 따라서 미량으로 사용할 수 있다.In the polyvinyl chloride resin composition used to prepare the polyvinyl chloride pipe and pipe fitting of the present invention, in addition to the above components, additional components such as colorants, fillers, antistatic agents and the like may be used in trace amounts depending on the desired physical properties. have.

본 발명의 폴리염화비닐 파이프 및 파이프 이음관을 제조하는 데에 사용되는 폴리염화비닐 수지 조성물은 내충격 하수도용 파이프나 물받이 부속용 파이프 등의 유체파이프 및 파이프 이음관 뿐만 아니라 그 밖의 각종 산업용 가정용 유체파이프 와 파이프 이음관을 제작하는 데에 사용될 수 있다.The polyvinyl chloride resin composition used to manufacture the polyvinyl chloride pipes and pipe fittings of the present invention is not only fluid pipes and pipe fittings such as impact sewer pipes and pipes for drip trays, but also various other industrial household fluid pipes. It can be used to fabricate pipe and pipe joints.

이상에서 설명한 본 발명은 전술한 설명에 의해 한정되는 것은 아니고, 본 발명의 기술적 사상을 벗어나지 않는 범위 내에서 여러 가지 치환, 변형 및 변경이 가능함은 본 발명이 속하는 기술분야에서 통상의 지식을 가진 자에게 있어 명백할 것이다.The present invention described above is not limited to the above description, and various substitutions, modifications, and changes are possible within the scope without departing from the technical spirit of the present invention. It will be obvious to you.

Claims (2)

폴리염화비닐 레진 100 중량부에 대하여 황토 5∼45 중량부, 경탄(CaCo3) 8∼25 중량부, 복합안정제 2∼3 중량부, 충격보강제 6∼8 중량부를 함유하는 폴리염화비닐 수지 조성물에 의해 제조된 폴리염화비닐 파이프.To polyvinyl chloride resin composition containing 5 to 45 parts by weight of ocher, 8 to 25 parts by weight of hard coal (CaCo 3 ), 2 to 3 parts by weight of composite stabilizer, and 6 to 8 parts by weight of impact modifier, based on 100 parts by weight of polyvinyl chloride resin. Polyvinyl chloride pipe manufactured by 폴리염화비닐 레진 100 중량부에 대하여 황토 5∼45 중량부, 경탄(CaCo3) 8∼25 중량부, 복합안정제 2∼3 중량부, 충격보강제 6∼8 중량부를 함유하는 폴리염화비닐 수지 조성물에 의해 제조된 폴리염화비닐 파이프 이음관.To polyvinyl chloride resin composition containing 5 to 45 parts by weight of ocher, 8 to 25 parts by weight of hard coal (CaCo 3 ), 2 to 3 parts by weight of composite stabilizer, and 6 to 8 parts by weight of impact modifier, based on 100 parts by weight of polyvinyl chloride resin. Polyvinyl chloride pipe fittings manufactured by
KR1020080073888A 2008-07-29 2008-07-29 A poly vinyl chloride pipe and a joint pipe KR20100012480A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101253742B1 (en) * 2012-09-11 2013-04-12 주식회사 삼진프라코 A joint pipe
KR102033684B1 (en) 2019-02-20 2019-11-29 (주)호명메탈 A plating metal plate and manufacturing method for metal piping
KR20200100952A (en) 2019-02-19 2020-08-27 주식회사 대건케미칼 Eco-friendly composition for pipe making
KR102165524B1 (en) 2020-03-30 2020-10-14 주식회사 대건케미칼 The pigment composition for the plastic moldings having water-borne prevention effect

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101253742B1 (en) * 2012-09-11 2013-04-12 주식회사 삼진프라코 A joint pipe
KR20200100952A (en) 2019-02-19 2020-08-27 주식회사 대건케미칼 Eco-friendly composition for pipe making
KR102033684B1 (en) 2019-02-20 2019-11-29 (주)호명메탈 A plating metal plate and manufacturing method for metal piping
KR102165524B1 (en) 2020-03-30 2020-10-14 주식회사 대건케미칼 The pigment composition for the plastic moldings having water-borne prevention effect

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