Abstract

Disclosed is a reparation method for extending the service life of a petroleum transport pipe. The method comprises: (1) preparing a corrosion-resistant flexible tube for use in reparation; (2) cutting open the petroleum pipe needing to be repaired; (3) using a robot designed for the pipe to draw a draw-rope; (4) cleansing the pipe to be repaired; (5) using the draw-rope to draw the corrosion-resistant flexible tube prepared in step (1); (6) using compressed air to open the flexible tube such that the flexible tube attaches to the steel pipe being repaired; and (7) fastening a fastener to complete the reparation. The method can solve an interior corrosion problem of a pipeline by installing a lining tube in a steel pipe without performing a large-scale ground digging operation, thereby repairing a pipe quickly, and reducing time required for installation.

IPC Classes  ?

• F16L 55/16 - Devices for covering leaks in pipes or hoses, e.g. hose-menders

Abstract

A method for manufacturing a heat-resistant flexible continuous composite lining tube comprises the following steps: weaving a reinforcement layer; using a drawing mechanism to draw the woven layer; extruding, by an inner layer extruder and a mold, an inner layer out of an opening on a top of the woven layer; applying a drawing force to cause the woven layer to pass through a heater; and during a process of plasticizing the inner layer, extruding an outer layer by an outer coating extruder and a mold. The method integrally forms a flexible tube by adhering rubber to the reinforcement layer via heating. The flexible tube of the invention can be installed conveniently, and has a high pressure-bearing capacity. After being installed, the flexible tube does not burst even if a fluid penetrates to the reinforcement layer. The flexible tube can be used at a temperature up to 150ºC .

IPC Classes  ?

• F16L 11/08 - Hoses, i.e. flexible pipes made of rubber or flexible plastics with reinforcements embedded in the wall
• B29C 47/02 - incorporating preformed parts or layers, e.g. extrusion moulding around inserts or for coating articles
• B29D 23/00 - Producing tubular articles

Abstract

A one-step molding production device for an auto-pressure-bearing ultra-long composite liner tube. The device comprises a braiding machine (1), wherein an upper part of the braiding machine (1) is connected to an upper extruder (3) through an inner coating mold (2), a lower part of the braiding machine (1) is provided with a heater (4), an outer coating mold (5) is provided below the heater (4), the outer coating mold (5) is connected to a lower extruder (6), a cooling device (7) is provided below the outer coating mold (5), and a drawing machine (8) is used to draw the product coming out from the cooling device (7). The liner tube can be formed by one-step molding, has high bearing capacity and flexibility, is convenient to install, and the maximum service temperature can be up to 150ºC .

IPC Classes  ?

• B29C 47/02 - incorporating preformed parts or layers, e.g. extrusion moulding around inserts or for coating articles
• B29C 47/20 - with annular opening, e.g. for tubular articles

Abstract

A low-warpage and high-hardness polymer, consisting of the following components calculated in weight percentages: 40-80% of a POK resin, 0.1-2% of a compatibilizer, 0.1-5% of a processing aid and 20-60% of glass fibres. Compared with conventional engineering plastics, the polymer obtained through the steps of material preparing, mixing and extruding has a more excellent impact resistance and chemical resistance, and a higher hardness and abrasion resistance; the hardness and the abrasion resistance are far higher than those of the current hardest polymer POM (polyformaldehyde); and the warpage is low, thus making the low-warpage and high-hardness polymer suitable for occasions where the precision requirement is high.

IPC Classes  ?

• C08L 73/00 - Compositions of macromolecular compounds obtained by reactions forming a linkage containing oxygen or oxygen and carbon in the main chain, not provided for in groups Compositions of derivatives of such polymers
• C08L 51/00 - Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bondsCompositions of derivatives of such polymers
• C08K 13/04 - Ingredients characterised by their shape and organic or inorganic ingredients
• C08K 7/14 - Glass
• C08K 5/526 - Esters of phosphorous acids, e.g. of H3PO3 with hydroxyaryl compounds
• C08K 5/134 - Phenols containing ester groups

Abstract

Provided is a high-strength polycarbonate composite capable of laser marking, comprising the following components in parts by weight: 15-60 percent of a PC resin, 5-40 percent of a silicon copolymer PC, 0-8 percent of a compatilizer, 0-20 percent of a fire retardant, 0.1-2 percent of a laser marking aid, 0.1-5 percent of a processing aid and 20-60 percent of fiberglass. By means of the steps of preparing materials, mixing and extruding, the resulting composite material has a rigidity capable of replacing metals, high strength, and excellent surface quality, does not separate with long-term use, and can also form a clear laser marking effect. Also provided is a method for preparing a high-strength polycarbonate composite capable of laser marking. The method can reduce subsequent processing steps of products, improve production efficiency and reduce costs.

IPC Classes  ?

• C08L 69/00 - Compositions of polycarbonatesCompositions of derivatives of polycarbonates
• C08K 7/14 - Glass

Abstract

Disclosed is a flame retardant polycarbonate-reinforced high-modulus moulding composition. The material contains polycarbonate and/or polyester carbonate, glass fibres, an impact modifier, a flame retardant, poly(alkyl acrylate) and a fluorohydrocarbon resin. The composition has a scientific material selection and advanced preparation process, is prepared through the steps of mixing, extrusion, granulation, drying and injection moulding, has a higher impact strength, a high transparency, a high thermal stability, a higher welding strength and a good flame retardancy, is easier to process than pure polyimides and also lower in cost, and can be used for transparent automotive glass materials or LED packaging materials with higher requirements for transparency and for electrical appliance materials requiring thinner materials.

IPC Classes  ?

• C08L 69/00 - Compositions of polycarbonatesCompositions of derivatives of polycarbonates
• C08L 51/00 - Compositions of graft polymers in which the grafted component is obtained by reactions only involving carbon-to-carbon unsaturated bondsCompositions of derivatives of such polymers
• C08L 33/12 - Homopolymers or copolymers of methyl methacrylate
• C08L 27/12 - 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 halogenCompositions of derivatives of such polymers not modified by chemical after-treatment containing fluorine atoms
• C08K 7/14 - Glass
• C08K 5/51 - Phosphorus bound to oxygen

Abstract

Provided are a flame-retardant polycarbonate reinforced high-modulus molding composition and a preparation method therefor. The flame-retardant polycarbonate reinforced high-modulus molding composition of the present invention comprises a polycarbonate or/and a polyester carbonate, a glass fibre, an impact modifier, a flame retardant, a polyalkylacrylate and an additive, and is characterized in that the polycarbonate and/or polyester carbonate is 40-90 parts by weight, the glass fibre is 5-50 parts by weight, the impact modifier is 1-20 parts by weight, the flame retardant comprises 1-20 parts by weight of a phosphorus-containing flame retardant and 0.1-5 parts by weight of a fluorohydrocarbon resin, the polyalkylacrylate is 1-20 parts by weight, and the additive comprises at least 0.1 parts by weight of an antioxidant. In the present invention, a phosphorus-based flame retardant is used in combination with a cocoon-type or flat glass fibre and a polyalkylacrylate with a high molecular weight, and the flame-retardant polycarbonate reinforced molding material having an excellent appearance and mechanical properties can be obtained.

IPC Classes  ?

• C08L 69/00 - Compositions of polycarbonatesCompositions of derivatives of polycarbonates
• C08L 33/12 - Homopolymers or copolymers of methyl methacrylate
• C08K 3/04 - Carbon
• C08K 5/523 - Esters of phosphoric acids, e.g. of H3PO4 with hydroxyaryl compounds
• C08K 7/14 - Glass

Abstract

Provided are a reduced-stretchability multilayer tube and a manufacturing method therefor. The method comprises the following steps: manufacturing a first layer, a second layer, and a third layer of a tube; introducing the first layer into the third layer; vulcanizing the first layer and the third layer, stretching the first layer and the third layer in a direction roughly parallel to the lengthwise direction thereof; introducing the second layer into the vulcanized first layer and third layer for vulcanization. This allows the stretchability of the multilayer tube to be effectively reduced while retaining its rebound resilience, thus enhancing the use performance of the multilayer tube.

IPC Classes  ?

• B29D 23/00 - Producing tubular articles

Abstract

Provided is a multi-layer hose (100) comprising a cover layer (110), comprising a first polymer, an enhancement layer (120) comprising woven filament and an inner lining (130), comprising a second polymer, wherein the first polymer and the second polymer are dissimilar. The first polymer is preferably a polymer with good wear resistance properties, e.g., thermoplastic polyurethane (TPU), TPU/PVC, or PVC, or PVC/NBR. The second polymer is preferably a polymer with good chemical resistance properties, e.g. ethylene propylene diene monomer (EPDM) rubber. The present invention also provides a method of manufacturing said multi-layer hose (100).

IPC Classes  ?

• B32B 1/08 - Tubular products
• B29C 47/20 - with annular opening, e.g. for tubular articles

Abstract

A manufacturing method for a multilayer tube. The method comprises the following steps: respectively manufacturing a first layer and a second layer of a tube; distributing a lubricant having an adhesive effect on the outer surfaces of the first layer and of the second layer; manufacturing a third layer of the tube; introducing the first layer having on the surface thereof the lubricant having the adhesive effect into the third layer to allow the surface of the first layer on which the lubricant having the adhesive effect is distributed to contact the third layer; vulcanizing by passing a hot gas in the first layer; flipping the first layer and the third layer that are connected; introducing the second layer having on the surface thereof the lubricant having the adhesive effect into the third layer to allow the surface of the second layer on which the lubricant having the adhesive effect is distributed to contact the third layer; and, vulcanizing by passing the hot gas in the second layer. The manufacturing method facilitates sleeving and production, while the peel strength among the tube layers of the tube produced is high.

IPC Classes  ?

• B29D 23/00 - Producing tubular articles

Abstract

　The invention provides a rubber solid adhesive, and a preparation method and use thereof. The rubber solid adhesive of the present invention comprises the following components in parts by weight: 15-40 parts of a natural rubber, 15-50 parts of a styrene-butadiene rubber, 10-40 parts of an ethylene propylene diene monomer rubber, 5-15 parts of zinc oxide, 1-2 parts of stearic acid, 1-4 parts of an anti-aging agent, 1-10 parts of naphthenic oil, 10-30 parts of white carbon black, 0-100 parts of light calcium carbonate, 3-10 parts of a rubber adhesive HMMM-80, 3-10 parts of resorcinol-80, 0.5-2 parts of an accelerator CZ, 0-0.5 part of an accelerator TMTD, 1-3 parts of sulphur and 2-5 parts of TS280 blocked isocyanate. The rubber solid adhesive of the present invention is used for bonding untreated terylene filaments and nylon during a fire hose production process, and has high adhesive strength, and better resistance to heat and ironing than other hot-melt adhesives, and high bonding stability.

IPC Classes  ?

• C09J 109/06 - Copolymers with styrene
• C09J 107/00 - Adhesives based on natural rubber
• C09J 123/16 - Ethene-propene or ethene-propene-diene copolymers
• C09J 11/04 - Non-macromolecular additives inorganic
• C09J 11/06 - Non-macromolecular additives organic
• B29C 47/02 - incorporating preformed parts or layers, e.g. extrusion moulding around inserts or for coating articles
• F16L 11/02 - Hoses, i.e. flexible pipes made of fibres or threads, e.g. of textile

Abstract

Disclosed is a manufacturing method for a fracturing fluid conveying hose, comprising the steps of: (a) drying, stirring and colour matching of an outer adhesive layer; (b) drying, stirring and colour matching of an inner adhesive layer; (c) weaving a reinforcing layer; and (d) covering a mould core of a co-extruding mould with the reinforcing layer, sucking granular materials well dried in steps (a) and (b) into two extruders, respectively, and starting the extruders and a tractor (5), so that the reinforcing layer, the outer adhesive layer and the inner adhesive layer together pass through the co-extruding apparatus to obtain a product. Further disclosed are a co-extruding apparatus for manufacturing a fracturing fluid conveying hose and a fracturing fluid conveying hose. The outer adhesive layer and the inner adhesive layer of the fracturing fluid conveying hose manufactured by the above-mentioned method and apparatus are of different materials and can meet different requirements. The hose is dimensionally stable and has a low elongation.

IPC Classes  ?

• B29C 47/06 - Multilayered articles
• B29C 47/20 - with annular opening, e.g. for tubular articles
• F16L 11/02 - Hoses, i.e. flexible pipes made of fibres or threads, e.g. of textile

Abstract

A method for manufacturing a fracturing fluid conveyance tube for shale oil and gas extraction, the method comprising: (1) extruding to manufacture a covering layer with an adhesive layer; (2) extruding to manufacture a liner layer with an adhesive layer; (3) conducting physical permeation on the extruded covering layer and liner layer for later use; (4) manufacturing a reinforcing layer; (5) conducting physical and chemical bonding between the covering layer and the reinforcing layer by heating and pressurizing; (6) turning a belt; (7) conducting physical and chemical bonding between the liner layer and the reinforcing layer by heating and pressurizing. Also provided are a fracturing fluid conveyance tube manufactured via the above method for shale oil and gas extraction, and a co-extrusion mold. The covering layer and liner layer of the fracturing fluid conveyance tube for shale oil and gas exploitation can be made from different types of materials, and different combinations of materials of the covering layer and the liner layer can meet more requirements, thus reducing product costs. The tube has strong integrity, good flexure resistance, and long service life; in addition, the tube can bear high pressure, has large throughput capacity, good weather resistance and chemical resistance, and is easy to connect, and can adapt to different terrains. And when not in use, the tube is flat and easy to roll up, and has a small footprint for storage and conveyance.

IPC Classes  ?

• B29C 47/20 - with annular opening, e.g. for tubular articles