70results about How to "Increased tangle" patented technology

The present invention discloses one kind of composite material of modified micro plant fiber powder and natural rubber and its preparation process and application. The composite material includes natural rubber or latex 100 weight portions, modified micro plant fiber powder 1-60 weight portions, sulfur 0.5-3.3 weight portions, promoter 1.2-4.3 weight portions, antiager 1-3 weight portions and other assistant. The preparation process includes mixing, forming, vulcanizing and other steps. The composite material has high tensile strength, high tearing strength, high ageing resistance, high virus permeation resistance, etc. and may be used widely in making urinary catheter, blood transfusion tube, condom, medical gloves and other products.

At present, natural fibrilia non-woven fabric materials are partial to a heavy type, and are mainly applied to the field of materials for automobiles, but the application of the natural fibrilia non-woven fabric materials to the field of home textiles is limited. The invention provides a semi-durable ramie nonwoven material for the home textiles, which comprises a matrix material and a surface modification layer formed by padding the matrix material in finishing liquid, wherein the matrix material comprises the following components in percentage by mass: 80 to 90 percent of ramie combed noil fibers and 10 to 20 percent of polylactic acid bi-component fibers; the finishing liquid comprises the following components in percentage by mass: 97.5 to 99.4 percent of polyacrylate bonding agent, 0.2 to 1.5 percent of hydrophilic organic silicon softening agent and 0.1 to 0.5 percent of penetrating agent; and the thickness of the ramie nonwoven material for the home textiles is between 0.5 and 1.5 millimeters, and the weight is between 60 and 120 grams / square meter. The semi-durable ramie nonwoven material has the functions of light weight, thinness, washability, antibacterium, acarid prevention, static resistance and ultraviolet light prevention, is soft in handfeel, and can be degraded completely after being discarded.

The invention provides a tetramine monomer for synthesis of hyperbranched polyimide, and is used for solving the problems that a conventional polyimide has relatively poor thermal stability, film formation performance and other thermal properties and mechanical properties; through introduction of carbonyl and an ether chain into the tetraamine monomer, an obtained polymer has good solubility, thermal performance and mechanical properties. In addition, due to long synthesis route and large difficulty of a new electric-activity monomer, the characteristic that the hyperbranched polymer has a large number of end groups is utilized, a ferrocene group with electrochemical activity is introduced, the tetraamine monomer is subjected to a reaction with dianhydride and (4-amino)phenyl ferrocene, and the hyperbranched polyimide having ferrocene terminated and having the electrical activity can be easily prepared; the polymer can be used as an electrical storage material to be applied in the field of information storage.

The invention relates to a water-flushing degradable non-woven fabric and a production method thereof. Profiled viscose fibers and wood pulp fibers are directly used as raw materials and are opened and mixed, then the profiled viscose fibers and the wood pulp fibers are mutually twisted through wet process formation and spun-lacing reinforcement, hydrogen bonds are formed between the profiled viscose fibers and the wood pulp fibers and finally drying is performed to obtain the water-flushing degradable non-woven fabric. By adopting the scheme, the strength of the water-flushing degradable non-woven fabric is high, the water-flushing degradable non-woven fabric can be quickly and fully degraded under the effect of water flushing and the production process is simple.

The present invention relates to a polyamide composition suitable for extrusion molding, blow molding and foaming multi uses, the polyamide composition is characterized by comprising 49 to 89% (by weight) of thermoplastic polyamide resin, 0.01 to 10% (by weight) of maleic anhydride copolymer, 0 to 50% (by weight) of filler, 0 to 20% (by weight) of an impact-resistant modifier and 0.1 to 2% (by weight) of an additive, wherein the maleic anhydride copolymer is prepared by alternating copolymerization or block copolymerization of maleic anhydride and one or two alkenyl-containing monomers which contain heteroatom or does not contain heteroatom. The polyamide composition has the advantages of high melt strength increase and significantly enhanced mechanical properties, is suitable for machining or molding process requiring higher melt strength, and is particularly suitable for extrusion molding, blow molding and foaming and the like.

The invention discloses polyvinyl alcohol (PVA) fiber, and a preparation method and a preparation device thereof. The method comprises the following steps: dissolving polyvinyl alcohol into distilled water; adding 1 to 5 weight percent of water soluble hydroxyl terminated hyperbranched polyester; placing the obtained mixed liquor at the temperature of between -20 and -70 DEG C and freezing for 8 to 24 hours; defreezing and heating at room temperature to prepare spinning liquor with the viscosity of 180 to 550 mpa.s; and obtaining high strength polyvinyl alcohol nano-fiber nonwoven fabric with the strength of 1,045 to 1,800 N / m<2> on a receiving screen by an electrostatic spinning process. The PVA liquor is frozen and defrozen, so the intermolecular chain entanglement is improved, more intermolecular hydrogen bonds are formed, and the tensile strength of the obtained nano-fiber can be obviously improved. The invention has a simple process, is pollution free in the production process and contributes to quick development and popularization application of the PVA nano-fiber.

The invention relates to the technical field of spunlace non-weaving, and discloses a spunlace non-woven material containing natural dry petals and a preparation method thereof. The spunlace non-wovenmaterial comprises dry fiber webs and wet fiber webs which are intertwined, and the intact natural dry petals are placed between the wet fiber webs and the dry fiber webs; the natural dry petals areselected from petals which use carotenoids as main pigments and have colors from yellow to red, and the length-width ratio of the natural dry petals is smaller than 10:1. According to the spunlace non-woven material, the characteristics of dry-laid web and wet-laid web spunlace processes are fully utilized, and the whole petals with natural morphology are uniformly distributed in the spunlace non-woven material, so that the spunlace non-woven material has natural beauty care effects, the aesthetic feeling of cloth covers of personal care materials are enhanced, and the technical problems of petal colour fading, color diffusion, short product storage period and easy falling of petals during the production and use process are effectively solved through reasonable process coordination.

The present invention provides an environment-friendly glutinous-rice gum for plate production and a preparation method of the gum. The method comprises the following steps: 1) mixing a modifier, glacial acetic acid and absolute ethanol to prepare a mixed solution M1; 2) under a pH condition of 3-5, dropwise adding tetrabutyl titanate into the above prepared mixture M1, and performing mixing for 1-2 h at a temperature of 60-100 DEG C to obtain a colloid M2; and 3) mixing glutinous rice flour, the colloid M2, didecyl dimethyl ammonium chloride, carrageenan, xanthan gum, locust bean gum, sodiumcarboxymethylcellulose and water to prepare the environment-friendly glutinous-rice gum for sheet production, wherein the modifier is at least one selected from of pentaerythritol, propylene glycol, neopentyl glycol and stearic acid. The glutinuous-rice gum achieves advantages of environmental protection, high adhesion, corrosion resistance and the like.

The invention relates to the technical field of high polymers and in particular relates to a lightweight polypropylene micro-foamed composite material and a preparation method thereof. The lightweightpolypropylene micro-foamed composite material is prepared from a raw material composition; the raw material composition is prepared from the following components in parts by weight: 89 to 93 parts ofcopolymerized polypropylene, 1 to 3.5 parts of a foaming agent, 2 to 6 parts of sepiolite fiber, 0.2 to 0.6 part of an anionic surfactant, 0.6 to 1.8 parts of a quaternary ammonium salt intercalationagent, 5 to 10 parts of a compatilizer, 0.2 to 0.4 part of an antioxidant, 0.5 to 1 part of a lubricant and 0 to 2 parts of a selective auxiliary agent. According to the lightweight polypropylene micro-foamed composite material, the modified sepiolite fibers are added into polypropylene, so that the mechanical strength of the polypropylene is remarkably increased and a pore diameter of foam poresis thinned; the utilization requirements of manufacturing parts including automobile door plates, air channels, central channels, stand columns and the like can be met, and the lightweight polypropylene micro-foamed composite material has profound significance in automobile weight reduction.

The invention discloses a high-strength polylactic acid bone fixation material and a preparation method thereof. The high-strength polylactic acid bone fixation material is characterized in that a multifunctional long-chain flexible branching agent is prepared by virtue of reaction of polyether and aliphatic isocyanate and is combined with a multifunctional epoxy compound for use, and long-chain branched polylactic acid is prepared by virtue of a simple, convenient and feasible reactivity processing method, so that the entanglement degree of chains among polylactic acid molecules is increased,and the tensile property of polylactic acid is improved; and by introducing a polyether long chain, polylactic acid is endowed with relatively good impact toughness, and a high-power uniformly-orientated polylactic acid material is prepared on that bases by virtue of a double-shaft solid phase thermal stretching method, so that the mechanical strength of the polylactic acid material as the bone fixation material is substantially enhanced, and meanwhile, the biocompatibility of the polylactic acid material is improved.

The invention discloses a reinforced polypropylene material, a preparation method and application thereof. The reinforced polypropylene material comprises the following components in parts by weight: 30-70 parts of straight-chain polypropylene, 2-50 parts of long branched chain polypropylene, 1-20 parts of a compatilizer, 5-60 parts of reinforcing fibers, 0.1-20 part of a fluorine compound. According to the invention, the polypropylene material prepared by the method is high in surface gloss, good in toughness and high in melt strength, and is mainly suitable for blow molding, plastic uptake and other occasions.

The invention relates to a film with high tensile strength. The film is a seven-layer compound film. The film comprises a layer A, a layer B, a layer C, a layer D, a layer E, a layer F and a layer G from outer to inner starting from the cross section of the film, wherein the layer A is composed of a blending modified resin of metallocene polyethylene and ethylene modified PET; the layer B is madefrom graphene oxide modified low-density polyethylene; the layer C is made from maleic anhydride grafted low-density polyethylene; the layer D is made from ultra-high molecular weight polyethylene; the layer E is made from maleic anhydride grafted low-density polyethylene; the layer F is made from graphene oxide modified low-density polyethylene; the layer G is made from polyvinylidene fluoride. Compared with a common film, the film with high tensile strength provided by the invention has higher strength, no spreading of damaged holes, higher surface viscosity and higher tensile strength, so that the film with high tensile strength can be applied to special occasions.