37results about How to "Low temperature impact resistance" patented technology

A resin fuel tank having a two-layer structure of inner and outer layers is formed by rotational molding so as to be superior not only in appearance but also in weathering resistance, low temperature impact resistance and resistance to gasoline permeability.

A fuel hose is equipped with a tubular inner layer (1) comprising (A) below, and an outer layer (2) comprising (B) below, disposed in contact with the outer circumferential surface of the inner layer. The fuel hose satisfies the conditions of (a) or (ss) below. Consequently, it is possible to provide a fuel hose that is lightweight, has extremely low fuel permeability, is inexpensive, and has excellent interlayer adhesion, flexibility, low temperature impact properties, and heat resistance. (A) A resin composition consisting mainly of an aromatic polyamide resin. (B) A resin composition consisting mainly of a polyolefin resin and / or an aliphatic polyamide resin. (a) The resin composition (B) contains acid-modified SEBS and / or acid-modified PMMA-PBA-PMMA. (ss) The resin composition (A) contains acid-modified SEBS and / or acid-modified PMMA-PBA-PMMA, and the resin composition (B) contains amine-modified SEBS.

The present invention discloses a modified polyamide resin composition and backplane substrate film prepared by the same. The modified polyamide resin composition comprises the following components, by mass: 5-75 parts of polyamide resin, 5-75 parts of polypropylene resin, 5-50 parts of grafted polyethylene, and 0-100 parts of a filler. The grafted polyethylene is prepared from the following components via graft reaction: 100 parts of polyethylene resin, 0.5-2.0 parts of a grafting agent, and 0.03-0.2 parts of an initiator. According to the present invention, a new resin composition used for backplane substrates of solar energy assemblies is developed; the final product obtained has anti-aging, particularly anti-damp and heat aging performance, and also has low saturation water absorption, low water vapor transmission and excellent electrical insulating properties, and backplane substrate film prepared therefrom further has high adhesion and mechanical strength, and can be used for manufacturing backplane of solar energy assemblies.

Provided is a multilayer tube that has a layer containing an aliphatic polyamide (such as Polyamide 11 or Polyamide 12), a layer containing a Polyamide 6 composition or Polyamide 6 / 66 / 12 composition, a layer containing a saponified ethylene-vinyl acetate copolymer, and a layer containing a semi-aromatic polyamide composition that contains a semi-aromatic polyamide having a specific structure, and further has a fluorine-containing polymer in which a functional group having reactivity with an amino group is introduced into the molecular chain thereof.

The invention provides a manufacturing method of steel, comprising the following steps: smelting the molten steel to ensure that the content of P in the molten steel is less than or equal to 0.035%, the content of S is less than or equal to 0.015% and the content of V is less than or equal to 0.15%; then adding Cu element and Ni element to the molten steel to ensure that the content of Cu in the molten steel is 0.20-0.60% and the content of Ni is 0.15-0.55%; tapping to a steel ladle when the content of C in the molten steel is below 0.05%; adding physical mixture of lime and fluorite and predeoxidizing agent to the steel ladle in the tapping process to ensure that the content of S in the molten steel is less than or equal to 0.012%; adding Cr element, Si element and Mn element to the molten steel to ensure that the content of Si in the molten steel is 0.25-0.60%, the content of Mn is 0.80-1.60% and the content of Cr is 0.20-0.80%; feeding Al simple substance to the molten steel to carry out final deoxidation; heating the molten steel in the condition of argon blowing to lead the steel slag to melt; then adding Al simple substance to the steel ladle to ensure that the content of S in the molten steel is less than or equal to 0.010%; and then adding C element to the molten steel to ensure that the content of C in the molten steel is 0.08-0.16%; feeding Al simple substance and alloy containing Ti, V and N to the molten steel to control that the content of acid-soluble aluminium in the molten steel is 0.025-0.040%, the content of Ti is 0.005-0.015%, the content of V is 0.08-0.15% and the content of N is 0.010-0.020%.

A highly impact resistant ductile iron casting is made from a specified high nickel content ductile iron composition and post-treated with a specified heating and cooling profile to achieve an elongation exceeding the ASTM A536 (“60-40-18”) standard, and meeting or exceeding Charpy V Notch impact resistance at −20° F. of greater than 11.0 ft.lbs.

The invention provides a fastener used for niobium-containing 12.9-grade rail transit mobile equipment. The fastener is mainly prepared from the following chemical elements of, by mass percentage (%): 0.33-0.38% of C, 0.05-0.10% of Si, 0.70-0.90% of Mn, 0.70-0.90% of Cr, 0.60-0.90% of Ni, 0.20-0.30% of Mo, 0.015-0.045% of Als, 0.03-0.06% of Nb, less than or equal to 0.010% of P, less than or equal to 0.005% of S, and less than or equal to 0.0015% of T[O]; the austenitic grain size of the steel obtained after heat processing is greater than 10.0 grade; and the structure of the steel obtained after heat processing is characterized in that a small amount of fine proeutectoid ferrite is distributed on a tempered sorbite matrix in a dispersed way, the content of the proeutectoid ferrite is less than or equal to 3%, and the size is less than or equal to 5 micrometers.

The invention discloses a solar energy back panel. The solar energy back panel comprises an upper surface layer, a core layer and a lower surface layer from top to bottom, wherein the mass ratio of the upper surface layer to the core layer to the lower surface layer is (10-20):(60-80):(10-20), the upper surface layer is a polyethylene resin composition layer, the lower surface layer is a polypropylene resin composition layer, and the core layer is a polyolefin resin composition layer. The new solar energy back panel is developed, and experiments prove that the solar energy back panel has good adhesion and interlayer stripping properties, ageing resistance, high-temperature and damp-heat aging resistance, low saturated water absorptivity, low low-temperature impact resistance, low water vapor permeability and excellent electrical insulating property, and can completely meet the requirement of the back panel of a solar cell module.

The present invention is directed to a heat-sealable propylene-based polymer composition comprising a propylene polymer composition including a propylene polymer component and propylene / ethylene random copolymer component; an ethylene / α-olefin random copolymer; and a soft propylene polymer composition. The present invention also provides a heat-sealable film using the composition and a packaging bag comprising the film. The heat-sealable film of the present invention has high heat-seal strength, with little decrease in heat-seal strength even after heat treatment. The heat-sealable film also has excellent blocking resistance, rigidity and low-temperature impact resistance.

The invention provides a vanadium-containing 12.9-grade steel for a fastener applied to rail transit mobile equipment. The steel mainly comprises the following chemical elements in percentage by mass: 0.33% to 0.38% of C, 0.05% to 0.10% of Si, 0.70% to 0.90% of Mn, 0.70% to 0.90% of Cr, 0.60% to 0.90% of Ni, 0.20% to 0.30% of Mo, 0.015% to 0.045% of Als, 0.06% to 0.10% of V, 0.006% to 0.010% of [N], smaller than or equal to 0.010% of P, smaller than or equal to 0.005% of S and smaller than or equal to 0.0015% of T[O]. The thermally-treated steel is larger than 10.0 grades in austenitic grain size; the structure of the thermally-treated steel is a small amount of small proeutectoid ferrite dispersed on a tempered sorbite base body, wherein the amount of the proeutectoid ferrite is smaller than or equal to 3%, and the size of the proeutectoid ferrite is smaller than or equal to 5 micrometers.

The invention provides vanadium-contained 10.9-level steel for a fastener for rail transit mobile equipment. The steel mainly comprises following chemical elements including, by mass percentage, 0.33% to 0.38% of C, 0.05% to 0.10% of Si, 0.70% to 0.90% of Mn, 0.70% to 0.90% of Cr, 0.30% to 0.60% of Ni, 0.20% to 0.30% of Mo, 0.015% to 0.045% of Als, 0.06% to 0.10% of V, 0.006% to 0.010% of [N], not larger than 0.010% of P, not larger than 0.005% of S and not larger than 0.0015% of T[O]. The autstenitic grain size of steel obtained after heat treatment is larger than 10.0 level, and according to the structure of the steel obtained after heat treatment, a small amount of small pro-eutectoid ferrite is dispersed and distributed on a tempered sorbite base body, wherein, the amount of the pro-eutectoid ferrite is smaller than or equal to 5%, and the size of the pro-eutectoid ferrite is smaller than or equal to 5 micrometers.

The invention provides vanadium-contained 10.9-level steel for a fastener for rail transit mobile equipment. The steel mainly comprises following chemical elements including, by mass percentage, 0.33% to 0.38% of C, 0.05% to 0.10% of Si, 0.70% to 0.90% of Mn, 0.70% to 0.90% of Cr, 0.30% to 0.60% of Ni, 0.20% to 0.30% of Mo, 0.015% to 0.045% of Als, 0.03% to 0.06% of Nb, not larger than 0.010% of P, not larger than 0.005% of S and not larger than 0.0015% of T[O]. The autstenitic grain size of steel obtained after heat treatment of the fastener is larger than 10.0 level, and according to the structure of the steel obtained after heat treatment of the fastener, a small amount of small pro-eutectoid ferrite is dispersed and distributed on a tempered sorbite base body, wherein, the amount of the pro-eutectoid ferrite is smaller than or equal to 5%, and the size of the pro-eutectoid ferrite is smaller than or equal to 5 micrometers. The longitudinal mechanical property of the fastener obtained after heat treatment can meet the standard requirement.

The invention discloses a resin composition, which comprises the following components in terms of mass: 100 parts of silane-grafted polyethylene resin, 10-100 parts of pretreated filler, 0-1.5 parts of additive, and 0.05-0.5 part of catalyst; The silane-grafted polyethylene resin is prepared by grafting and cross-linking the following components: 100 parts of component A, 0.2-5 parts of silane, and 0.05-0.5 parts of initiator; wherein, the component A is selected from homopolymerization One or more of ethylene, copolymerized polyethylene and metallocene polyethylene. And a backboard prepared from the resin composition. The back sheet of the present invention not only has excellent adhesion and interlayer peeling force, but also has aging resistance, especially high temperature and heat aging resistance, and has low saturated water absorption, low temperature impact resistance, and low water vapor permeability. High efficiency and excellent electrical insulation, fully meet the requirements of the back sheet of solar cell modules.

The invention discloses martensite stainless steel with high strength and toughness. The stainless steel is prepared from the following components in percentage by mass: 0.06-0.3% of C, 11-15% of Cr,1.5-3% of Ni, less than 0.08% of P, less than 0.008% of S, less than 30 ppm of O and the balance of Fe and impurities. The martensite stainless steel has the characteristics of corrosion resistance, high strength, high toughness and low temperature impact resistance, overcomes the problem that martensite stainless steel and ferrite stainless steel are not high in strength, overcomes the problem that the conventional martensite stainless steel is poor in toughness and low-temperature performance, overcomes the high-cost problem of duplex stainless steel, and overcomes the defects that sorbite high-strength stainless structural steel has yield strength commonly smaller than 800 MPa, and breaking strength lower than 1000 MPa.