Abstract:
Provided are an organopolysiloxane composition for producing a rope structure excellent in fatigue resistance, a rope structure using the same, and a process for producing the rope structure. The organopolysiloxane composition comprises an organopolysiloxane having an average polymerization degree of 50,000 to 200,000 and represented by the following formula (I): wherein X1, X2, X3 and X4 are the same or different, each independently representing -H, -OH, -COOH, -R, -NH 2 , -ROH, -RCOOH, or -RNH 2 ; R representing an alkyl group or an aryl group; and each of m and n independently denotes an integer of not less than 1. The organopolysiloxane composition is applied to liquid crystalline polymer filaments in the process of producing the rope structure from the filaments.
Abstract:
A steel cord for a tire with the enhanced adhesion force is provided to put coating solution on the surface of a wet-type fiber and to have the stable rubber coverage. A compound selected from a group consisting of 97% of 4-carboxybenzaldehyde or 98% of anthranilonitrile is coated on the surface of the wet type cord plated by brass. The compound is melted by the wet type lubricating solution of 1-50 mol% and then the wet type cord plated by brass is impregnated into the solution for 15-80 seconds and dried, so that the steel cord for a tire is manufactured. The steel cord is used as a reinforcing member of the tire. The concentration of the melting solution is 1-50 mol% preferably. In the manufacturing processes, a sample piece is manufactured and the adhesion force of the sample piece and the erosion resistance property are evaluated.
Abstract:
종래 기술에서는, PC 강연선(鋼撚線)에 요구되고 있는 유연성과, 콘크리트와의 부착 강도를 손상하지 않도록 하여 인장(引張) 피로 특성의 향상을 도모하도록 하고, 또한 피막의 손상에 의한 소지(素地)의 노출을 방지하기 위해 표층부(외주면)에 두꺼운 피막을 형성하는 것이다. PC 강연선의 방청(corrosion protection) 피막 2중 결합 구조 형성 가공 방법은 PC 강연선을, 되풀기 측선을 심선(心線)으로부터 느슨하게 풀어 소지 조정을 하는 전처리 공정과, 이 전처리 공정 후에 심선에 대하여 측선을 꼬아 합쳐 느슨하게 닫고, 꼬아 합치는 것에 의한 나선형 홈부를 제외한 표층부에 합성 수지 분체(粉體) 도료를 도포하는 동시에 가열하여 부착시키고, 그 후 냉각하여 표층부에만 수지 피막을 형성하는 1차 도장 공정과, 이 1차 도장 공정 후에, PC 강연선의 측선을 심선으로부터 느슨하게 풀고, 심선 조정 수단을 경유하여, 느슨하게 풀린 상태에 있는 심선 및 측선의 각각 외주면에 합성 수지 분체 도료를 도포하는 동시에 가열하여 균등하게 부착시킨 후에 냉각하고, 측선에서 일부가 2중의 결합 피막이 되는 각각 단독 상태의 수지 피막을 형성하는 2차 도장 공정과, 이 2차 도장 공정 후에, 상기 2중의 결합 피막 부분이 연선의 표층부에 위치하도록 심선에 대하여 측선을 원래의 상태로 꼬아 합치는 공정으로 이루어지는 것이며, 유연성 및 콘크리트 부착 강도의 특성을 저해하지 않고, 특수 구조물로서 피막 손상의 우려가 드러나는 외표면을 보호하기 위해, 두꺼운 2중의 결합 피막을 용이하게 형성할 수 있다. PC 강연선, 표층부, 심선, 측선, 나선형 홈부.
Abstract:
PURPOSE: Provided are an elastomer and steel cord composite which, when used as, for example, a tire reinforcement, can exhibit a satisfactory corrosion resistance and a satisfactory fatigue resistance and which can shorten a curing time in tire component assembling and attain energy saving, and a process for producing the same. CONSTITUTION: The elastomer and steel cord composite which is a single layer steel cord obtained by stranding 3 to 6 steel filaments, is characterized in that an uncured rubber is coated on at least one of the steel filaments and this uncured rubber fills a space in a central portion of the cord.
Abstract:
A wire rope comprises a central core,a plurality of outer elongated elements surrounding said central core, a polyamide or a polyether block amide (PEBA) coating applied on said central core and said outer elongated elements, and a thermoplastic polyurethane (TPU) coating covering on said polyamide or said PEBA coating. The method of manufacturing such a wire rope is also disclosed.
Abstract:
A rope comprising polyethylene elongate elements oriented in the length direction of the rope wherein for at least part of the elongate elements the distance of the element to a central longitudinal rope axis varies over the length of the rope, the polyethylene elongate elements comprising tapes of ultra-high molecular weight polyethylene, the tapes having a width to thickness ratio of at least 10 and a polymer solvent content below 0.05 wt.%. The distance of at least part of the elements to the central longitudinal rope axis varies over the length of the rope between a longitudinal line which is at most 30% from the outside of the rope and a longitudinal line which is at most 30% from the central longitudinal axis of the rope. A rope with these properties, shows a high strength-strength ratio, defined as the ratio between the strength under use conditions and the fresh strength of the rope. A strength-strength ratio of at least 50%, preferably at least 70%, in particular at least 80% can be achieved.
Abstract:
A load bearing member includes at least one elongated tension member having at least one wire and a protective coating on the elongated tension member. The protective coating includes a first corrosion inhibitor having an oxide-forming metal, a second corrosion inhibitor having a rare earth metal, and a third corrosion inhibitor having an organic material.
Abstract:
Renfort filaire composite (R-2) enrobé de caoutchouc, utilisable notamment pour le renforcement d'un article fini en caoutchouc tel qu'un pneumatique, comportant un ou plusieurs fil(s) de renforcement(20), textile(s) ou métallique(s), et une composition de caoutchouc dite gomme d'enrobage (21) enrobant chaque fil, caractérisé en ce que ladite composition d'enrobage (21) comporte au moins un élastomère diénique, une charge renforçante, entre 10 et 150 pce d'une charge lamellaire et un système de réticulation. Cette gomme d'enrobage (21) possède des propriétés de barrière à eau améliorées, conférant ainsi au renfort filaire composite (R-2) de l'invention une meilleure protection contre les risques de corrosion ou de vieillissement dus à la pénétration d'eau, par exemple à travers la bande de roulement d'un pneumatique.
Abstract:
Renfort composite (R-2) susceptible d'adhérer directement à une matrice de caoutchouc diénique, utilisable comme élément de renforcement d'un bandage pneumatique, comportant: un fil ou plusieurs fil(s) de renforcement (20), notamment un câble en acier au carbone; recouvrant individuellement ledit fil, chaque fil ou collectivement plusieurs fils, une première couche (21) d'un polymère thermoplastique dont la température de transition vitreuse est positive, notamment un polyamide 6-6; - recouvrant la première couche (21), une deuxième couche (22) d'une composition comportant un poly(p-phénylène éther) ("PPE") et un élastomère thermoplastique styrénique ("TPS") fonctionnalisé insaturé, dont la température de transition vitreuse est négative, ledit élastomère étant porteur de groupes fonctionnels choisis parmi les groupes époxyde, carboxyle, anhydride ou ester d'acide, notamment un élastomère SBS époxydé. Procédé de fabrication d'un renfort composite; article ou produit semi-fini en caoutchouc, notamment bandage pneumatique, incorporant un tel renfort composite.