240results about How to "Improve bleeding" patented technology

An expandable arrow broadhead used for releasable attachment to one end of a hollow arrow shaft. The broadhead includes a sliding shaft with a pointed tip and tip base having two or more of cutting blades mounted thereon. Each of the blades includes an outer cutting edge and an inner edge. A portion of the sliding shaft is slidably received inside a hollow collar. The collar is attached to a sliding shaft housing. The sliding shaft housing is attached to an arrow shaft insert. The arrow shaft insert is adapted for receipt inside one end of the arrow shaft. In a retracted position, the blades are disposed next to and parallel to the length of the sliding shaft. When the pointed tip engages a target, the sliding shaft moves inwardly and rearwardly sliding inside the collar and inside a sliding shaft bore hole in the sliding shaft housing. As the sliding shaft moves rearwardly, a beveled cam surface of the blades engages a portion of the collar, which moves the blades outwardly into an extended position.

The invention discloses a mining foam paste filling material prepared by utilizing a synergistic foaming method and a preparation method thereof, which are widely suitable for filling of coal mine gob areas, closure of laneways and construction of underground firewalls. The filling material comprises a component A and a component B, wherein the component A comprises an active component, a fine aggregate, a mineral foaming agent, an activating agent, a coagulant and the like; and the component B comprises a foaming agent, a foam stabilizing agent, a water reducing agent and the like. The key point is as follows: after fly ash is activated, the fly ash can be used for replacing part of cement for being used as a cementing material; and in addition, a concrete foaming technology is applied to the filling material, and the mineral foaming agent is innovatively applied to work in coordination with a concrete foaming agent for foaming, so that the foaming expansion performance, pumping performance and anti-seepage performance of the filling material are improved on the original basis, a gob area with a larger space can be filled under the condition of low cement consumption, and low consumption, environmental friendliness, energy conservation and easiness in pumping are realized.

This multi-bladed scalpel addresses the problem of making many small incisions in very close proximity (as close as 0.030''/0.75 mm) to each other, to facilitate hair transplantation. With this device, it is possible to make multiple incisions in such proximity. With the blades mounted parallel to each other, at the desired spacing, each incision does not intersect neighboring incisions, so the follicles placed in each incision will be surrounded by the maximum amount of undisturbed tissue to promote revascularization-capillary growth to provide a blood supply to each transplanted follicle. CNC machining techniques are used to create the blade holders with blade mounting sites created at the desired proximity. Medical grade epoxy is used to mount the blades, which are mounted parallel to each other. Holes are drilled so the tips of the blade group are located in a plane at an angle with respect to the blade holder for ergonomic reasons

The invention discloses a preparation method of a water retaining agent. The preparation method comprises the following steps: carrying out an aqueous phase radical polymerization reaction on unsaturated amide micro-monomers, unsaturated sulphonic acid micro-monomers and unsaturated polyether macromers or unsaturated ester macromonomers under the coaction of an oxidation-reduction system composed of an initiator and a reducing agent to obtain a copolymerization product, regulating the pH value to 6-7 after the reaction, and adding water to obtain the water retaining agent with mass concentration of 1-60%. The preparation method disclosed by the invention is used for adjusting the product properties by controlling the monomer proportion, the temperature and the dosage of the initiator and the reducing agent, the reaction speed is high, the efficiency is high, no organic solvent is used, no toxin or pollution is generated, and the operation is simple. The unsaturated macromonomers are introduced into the prepared concrete/mortar water retaining agent to ensure excellent water retaining property and obviously perfect such stirring states of the concrete/mortar as bleeding/separation and the like without generating such adverse effects as strength and the like, meanwhile, the water retaining agent can be compounded with a polycarboxylic acid water reducing agent at any proportion to ensure good intermiscibility. The product performance is stable.

The invention discloses a cement plate composite modifier, and belongs to the field of composite modifier production. The composite modifier is composed of a hardening agent, an early strength agent, an accelerator, a water-retaining agent, a water reducer, a water repellent, and polymer. Compared with the prior art, the provided composite modifier can solve the problems that the demoulding strength of cement plate is low, the setting time is long, the cement plate secretes water, and the cement plate is brittle; moreover, the modifier can avoid or reduce the risk that the steel bars are corroded by chlorine ions and sulfate ions; at the same time, the activity of low-calcium fly ash is effective excited, a scheme is provided for the large mixing amount utilization of low-calcium fly ash, and the product cost is reduced.

The present invention provides a polyacetal resin composition having excellent processability and stability, significantly suppressing the amount of formaldehyde generated from the molded article thereof, and preventing the bleeding of blending components. Specifically, to 100 parts by weight of (A) a polyacetal copolymer in which the amount of hemiformal terminal group is 1.0 mmol/kg or less, the amount of formyl terminal group is 0.5 mmol/kg or less, and the amount of unstable terminal group is 0.5% by weight or less, there are added: 0.01 to 3 parts by weight of (B) a hindered phenol-based antioxidant; 0.01 to 1 part by weight of (C) a hydrazide compound; and 0.01 to 1 part by weight of a compound selected from (D) an isocyanate compound, an isothiocyanate compound, and a modified compound thereof.

The present invention belongs to the field of concrete preparation, and specifically relates to preparation of a concrete by using granite powder as a major mineral admixture. Granite powder or fly ash is employed to substitute natural sand or cement in the concrete, wherein the substitution rate of granite powder is 5-17.5 wt%, and the substitution rate of fly ash is 0-17.5 wt%, can significantly improve workability and bleeding performance if the fresh concrete, and has good compatibility with additives, so as to benefit the construction of commercial concrete.

The invention discloses a crosslinking-type low-sensitivity ester-ether copolymerized polycarboxylate superplasticizer and a preparation method thereof. The crosslinking-type low-sensitivity ester-ether copolymerized polycarboxylate superplasticizer has the number-average molecular weight of 10000-100000 and has a structural formula as shown in the specification. Under the synergistic effect of various groups, the polycarboxylate superplasticizer formed by copolymerization of 4-hydroxybutyl-vinyl polyoxyethylene ether, unsaturated acid, unsaturated phosphomonoester and unsaturated phosphodiester has the advantages of high water-reducing rate, high slump loss resistance, high peaceability, mud-resistant property and low dosage sensibility.

An expandable arrow broadhead used for releasable attachment to one end of a hollow arrow shaft. The broadhead includes a sliding shaft with a pointed tip and tip base having two or more of cutting blades mounted thereon. Each of the blades includes an outer cutting edge and an inner edge with a beveled cam surface and locking notch therein. A portion of the sliding shaft is slidably received inside a hollow collar. The collar is attached to a sliding shaft housing. The sliding shaft housing is attached to an arrow shaft insert. The arrow shaft insert is adapted for receipt inside one end of the arrow shaft. In a retracted position, the blades are disposed next to and parallel to the length of the sliding shaft. When the pointed tip engages a target, the sliding shaft moves inwardly and rearwardly sliding inside the collar and inside a sliding shaft bore hole in the sliding shaft housing. As the sliding shaft moves rearwardly, the beveled cam surface of the blades engages a portion of the collar, which moves the blades outwardly with locking notch securing the blades in an extended position.

The invention discloses a benzene and ketone free high temperature resistant table printing ink. The benzene and ketone free high temperature resistant table printing ink comprises, by mass, 25-40 parts of a polyurethane resin, 10-15 parts of polyethylene vinyl acetate, 30-45 parts of an ester alcohol solvent, 0.6-1 part of propylene glycol methyl ether acetate, 5-15 parts of a pigment, 0.3-0.6 parts of a dispersant, 0.3-0.6 parts of polyethylene wax powder, 0.8-1.5 parts of an adhesion promoter, 0.8-1.5 parts of an antistatic agent, 5-10 parts of a delustering agent, 0.3-0.6 parts of an antifoaming agent, 0.3-0.8 parts of a high temperature resistant assistant, and 1-2 parts of a curing agent. The adoption of a double liquid design increases the hardness and the adhesion of an ink film, effectively prevents offsetting or ink falling, realizes excellent high temperature and boiling resistances, and increases the shelf life of the printing ink.

The invention discloses a full-automatic self-service peripheral blood glucose detector. The full-automatic self-service peripheral blood glucose detector comprises an outer shell, wherein the outer shell is provided with a sterilization cavity and a detection cavity; a sterilizer and a dryer arranged in the detection cavity; a finger bed is arranged in the detection cavity; a blood collection system, a detection system and a pressing device are arranged above the finger bed; and an output system is arranged in the detection system and comprises a controller, a display screen arranged on the outer shell and a wireless transmission module. According to the full-automatic self-service peripheral blood glucose detector, a full-automatic technical scheme is provided for blood glucose detection, meanwhile, full automation of blood glucose detection is achieved, and existing complex detection steps for a patient are not needed, so that the compliance of a subject is greatly improved, and thework pressure of clinical medical staff is also relieved.

The invention discloses a high-water-retaining-property shield construction premixed synchronous grout material which comprises cement, coal ash, admixture, bentonite, fine sand, additives and water. The additives mainly comprise non-ionic cellulose ether, carbohydrate, polycarboxylic acid slump retaining agents, starch ether and magnetic hydrotalcite. The high-water-retaining-property shield construction premixed synchronous grout material has the advantages that the optimized admixture, the bentonite, the fine sand with the fineness modulus being 1.6 and the additives special for mortar are jointly used in the shield construction premixed synchronous grout material, the fluidity loss of the adjusted grout material is less than or equal to 30mm in 6 hours, bleeding rate is reduced to be lower than or equal to 3.0%, and sedimentation after a vibration test is less than or equal to 20mm; due to the fact that the magnetic hydrotalcite is added, the grout material can reduce construction noise during stirring and absorb heavy metal ions to prevent heavy metal in the mortar from causing secondary pollution on the basis that the original physical properties are kept.

A preparation method of the damage of the protection slopes of underwater concrete slabs is applicable to the preparation of the damage of the protection slopes of the underwater concrete slabs of waterways, dikes, dams, bank slopes, etc. In the method, underwater detection is carried out, mould bags with a suitable size are customized according to the position and the shape of a damage hole, mould bag concrete is positioned and casted, after the mould bag concrete blocks the damage hole, an infusion hole and a water outlet are bored at proper positions above the damage hole, a duct is applied to infuse underwater non-dispersible concrete from the infusion hole, the self-compaction and anti-dispersibility of the underwater non-dispersible concrete is utilized to fill up the cavity, seeper is drained out of the water outlet, consequently, the cavity is filled up, and the rupture and the collapse of the damaged slab can be prevented. The present invention does not need to build a cofferdam, underwater human operation is relatively less, engineering quantities and construction difficulties are reduced and the cost is decreased; because the underwater non-dispersible concrete is utilized in the concreting construction, the construction is safe and the water body is not polluted; a waterway is not needed to be closed up, so navigation is not affected.

The invention discloses a preparation method of an ether ester copolymerization type polycarboxylic acid water reducing agent for improving a rheological behavior. The water reducing agent is preparedthrough a copolymerization reaction of a first mixture, unsaturated polyether with the molecular weight of 4000-6000, unsaturated acid, a compound A, an initiator, a molecular weight regulator and deionized water, wherein the first mixture is prepared through an ester exchange reaction of methoxypolyethylene glycol with the molecular weight of 1000-4000, alkylphenol polyoxyethylene ether, unsaturated carboxylic ester and a polymerization inhibitor. According to the invention, a benzene ring and an imide structure are introduced, and the introduction of the benzene ring structure can effectively improve the adsorption efficiency and the thickness of an adsorption layer of polymer molecules on the surface of cement particles, so that the space stability effect of the water reducing agent ismore obvious; by means of introducing the imide structure, the adsorbability on the surface of the cement particles, the electrostatic repulsion effect among the cement particles, and the stability and the fluidity of the cement paste can be improved.

The invention discloses a preparation method of a starch grafting concrete thickener. The preparation method comprises the following steps: 1) pasting starch and obtaining a starch free radical under the effect of an initiator A; 2) performing water-phase free radical polymerization of the starch free radical, unsaturated amide small monomer and unsaturated sulfonic acid small monomer under the joint effect of an initiator B and a reducing agent system to obtain a copolymerization product; and 3) after reaction, washing with ethanol, performing suction filtration, drying, adjusting the pH to 6-7 with alkali liquor, and adding water to obtain a starch grafting concrete thickener with concentration of 10-20% by mass. The method disclosed by the invention has high efficiency and is easy to operate. The starch grafting concrete thickener prepared in the invention can remarkably improve the water retention capacity of concrete, and solves the problems of disintegration and bleeding of concrete while the product performance is stable.

The present invention provides methods of using recombinant human fibrinogen to prevent or treat excessive bleeding in pre-hospital and hospital settings. In particular, the present invention relates to methods for treating bleeding using recombinant human fibrinogen in individuals suffering from traumatic hemorrhages in pre-hospital settings and in individuals having thrombocytopenia or qualitative platelet disorders.

The invention designs cuttlebone-containing toothpaste which is characterized by comprising the following ingredients, by weight, 90-95% of toothpaste and 5-10% of cuttlebone powder. The cuttlebone-containing toothpaste has an advantage of improving oral ulcer and gingival bleeding.