40results about How to "Improve weld line strength" patented technology

The invention relates to a modified nylon material with high weld line strength and a preparation method thereof. The modified nylon material with high weld line strength comprises the following components in percentage by weight: 38.2-94.7% of nylon resin, 5-60% of inorganic filler, 0.1-0.6% of antioxidant, 0.1-0.6% of lubricant and 0.1-0.6% of talcum powder with the particle diameter being smaller than 1 micron, wherein the inorganic filler is chopped alkali-free glass fiber or kaolin processed by using a silane coupling agent. In the invention, the specially appointed inorganic filler processed by using the specially appointed coupling agent is added to the processing formula of the nylon material, thus the dispersity of the inorganic filler in the nylon resin and the interfacial binding force of the inorganic filler with the nylon resin can be effectively modified, and the weld line strength of the nylon material is enhanced. Furthermore, the inorganic filler is fed into an extruder for extrusion processing from a side feed inlet in the form of lateral feeding during the preparation of the nylon material, thus the structure of the inorganic filler can be prevented from being damaged due to long-time mixing, and the further guarantee is provided for the excellent service performance of the nylon material.

The invention relates to the technical field of polypropylene, in particular to a flame-retardant polypropylene with light specific gravity and impact resistance and a preparation method thereof. The flame-retardant polypropylene comprises 70-80 percent of polypropylene, 6-10 percent of flame retardant, 3-8 percent of antimony oxide, 5-8 percent of flexibilizer, 5-10 percent of antioxidant, 5-10 percent of antioxidant adjuvant and 5-10 percent of hexylene radical bis stearamide according to weight percentage. The flame-retardant polypropylene not only is light in specific gravity and resistant to impact, but also retards flame, greatly reduces the production cost of manufacturers while clearing away the potential fire hazard of plastic furniture, especially solves the technical difficulty of PP reactive flame retardant and flexibilizer with cooperativity and is at leading level at home and abroad. Proved by tests, the physical property can simultaneously meet the requirements of impact-resistant and fireproof UL94-V0 of plastic chairs.

The present invention relates to battery boxes comprising flame-retardant compositions comprising A) linear and/or branched aromatic polycarbonate and/or aromatic polyester carbonate, B) at least one graft polymer, C) one or more phosphorus compounds, D) optionally one or more antidripping agents, optionally E) thermoplastic vinyl (co)polymer (E.1) and/or polyalkylene terephthalate (E.2), and F) optionally one or more further additives, wherein the composition is preferably free from rubber-free polyalkyl(alkyl)acrylate.

The invention discloses a high-strength high-toughness polyvinyl chloride manhole cover and a preparation method thereof. The manhole cover is prepared from the following components in parts by weight:5-40 parts of PVC resin, 60-95 parts of ACR-g-VC resin, 2-8 parts of modifier, 2-5 parts of compound stabilizer, 0.5-2 parts of an internal lubricating agent, 0.5-1.2 parts of an external lubricatingagent, 0.1-1 part of optical stabilizer, 0.1-1 part of antioxidant and 1-80 parts of filler. The preparation method comprises the following steps: mixing the materials to obtain a polyvinyl chloridemixture; granulating in a twin-screw extruder, extruding and dicing with an extruder; and adding particles into an injection molding machine, performing injection molding to form the manhole cover. The manhole cover has the advantages of strong impact resistance, high tensile strength, good weather resistance, low temperature resistance and the like.

The present invention relates to flame-resistant moulding compositions of polycarbonates and graft polymers which, in addition to good flow properties, have very good mechanical properties and a particularly good, trouble-free surface. These moulding compositions are suitable in particular for injection moulding uses for mouldings with thin wall thicknesses and high-gloss surfaces. The thermoplastic moulding compositions according to the invention comprise A) 65.0 to 82.0 parts by wt. of at least one aromatic polycarbonate, B) 4.0 to 11.0 parts by wt. of at least one graft polymer, C) 14.0 to 24.0 parts by wt. of at least one phosphorus-containing flameproofing agent, wherein the sum of the parts by weight of components A to C adds up to 100 parts by weight and the total content of the polymer which is formed from the grafting monomers or is added in the free form and is not bonded chemically to the graft base is less than 2.0 wt. %, based on the total moulding composition.

The invention relates to a transfusion bag with a self-contraction function and a transfusion bag special material thereof. The transfusion bag special material comprises the following materials: medical-grade high temperature resistant polypropylene, a medical-grade polyolefin elastomer, an anti-oxidant, and an acid scavenger. The manufacturing process of the transfusion bag of the invention comprises the following steps: weighing according to the formula; well mixing the raw materials; performing extrusion granulation by a double screw extruder, cooling with circulating water, drying in the air, and cutting granules mechanically. According to the transfusion bag special material of the invention, a POE elastomer is added into the raw materials, which increases the flexibility of the transfusion bag, and provides the self-contraction function for the transfusion bag which is produced by injection molding, stretching, blow molding technology and has an elliptic cross section; the bag prepared by the transfusion bag special material of the invention has no soldering joint, which greatly reduces the risk of liquid leakage.

The invention relates to a low-odor high-weld-line-strength flame-retardant PC/ABS (polycarbonate/acrylonitrile butadiene styrene) composite which comprises PC, a phosphorus-containing flame retardant, ABS, PMMA (polymethyl methacrylate) and an impact resistant modifier. The low-odor high-weld-line-strength flame-retardant PC/ABS composite is prepared by means of preparing the ABS, PMMA and impact resistant modifier into a one-step material YBL-ABS through physical extrusion prior to mixing the one-step material YBL-ABS with waste materials. The composite has the advantages that the one-step material used is simple and easy to obtain, the preparation process is simple, cost is low, small molecules in material molecules can be removed effectively, meanwhile, weld line strength of the material is improved, and mechanical properties of the material can be improved significantly; the material can be applied to industries such as automobiles, refrigerators and televisions.

The invention relates to an elastic non-slip mat. The elastic non-slip mat is prepared from components in parts by weight as follows: 28-32 parts of a thermoplastic elastomer component, 28-32 parts of EVA (ethylene vinyl acetate copolymer), 20-30 parts of polyethylene, 16-24 parts of a filling agent, 2-4 parts of an anti-aging agent and 1-3 parts of an accelerant, wherein the thermoplastic elastomer component is prepared from a POE (polyolefin elastomer) and a TPE (thermo plastic elastomer) through mixing, and a mass ratio of POE to TPE is (1.7-2.1):1; the filling agent is prepared from wood flour and corn starch through mixing, and a mass ratio of the wood flour and the corn starch is (1.1-1.5):1. The elastic non-slip mat has the advantages as follows: content of the components is strictly controlled, and under the compatible action of the components, the mat is light in mass, good in elastic resilience and excellent in heat resistance and aging resistance and further has excellent slip resistance.

The invention discloses a glass fiber reinforced polyamide composite material with high weld mark strength, which comprises the following components in parts by weight: 100 parts of polyamide, 0.2-0.8part of a carboxyl compound, and 1-50 parts of glass fibers. The carboxyl compound is one or a combination of more of an aliphatic monocarboxylic acid compound with the 12-18 carbon atoms and/or an aliphatic dicarboxylic acid compound with the 12-18 carbon atoms. By adding a certain amount of the carboxyl compound into the glass fiber reinforced polyamide material, the intermolecular interactionforce at a weld mark can be improved, and the weld mark strength of the composite material is further improved.

The invention discloses a high-weld bond strength PE/PC alloy including, by weight, 5-40 parts of PE, 40-85 parts of PC, and 1-15 parts of an ethylene copolymer compatibilizer. The PE/PC alloy has high weld bond strength, excellent melt index and good thermal aging resistance, etc.

The invention provides a glass fiber reinforced polypropylene composite material with high weld mark strength. The glass fiber reinforced polypropylene composite material comprises the following ingredients in parts by weight: 100 parts of homopolymerized polypropylene, 1-10 parts of maleic anhydride grafted polypropylene, 1-10 parts of PA6 and 1-50 parts of glass fibers, wherein the PA6 is in a molecular weight range of 5,000 to 10,000. According to the glass fiber reinforced polypropylene composite material with high weld mark strength and the preparation method therefor, through adding a certain amount of the PA6 with a specific molecular weight range into the homopolymerized polypropylene, the weld line strength of glass fiber reinforced polypropylene can be improved.

Provided is a melt processible fluororesin composition for injection molding of articles that has melt flow that facilitates injection molding, that can enhance strength of a fluororesin weld line area in an injection molded article, and that achieves excellent release from a mold. The fluororesin composition includes two or more types of melt processible fluororesins having different melt flow rates; one of the melt processible fluororesins being a high melt flow rate melt processible fluororesin having a melt flow rate of 35 g/10 min or greater, and another being a low melt flow rate melt processible fluororesin having a melt flow rate of 10 g/10 min or greater but less than 35 g/10 min; and wherein the ratio of the melt flow rate (MFRa) of the high MFR melt processible fluororesin to the melt flow rate (MFRb) of the low MFR melt processible fluororesin (MFRa/MFRb) is from 1 to 10.