132results about How to "Good anti-adhesion effect" patented technology

A post operation adhesion proof carboxymethyl chitin membrane characterizing in containing carboxymethyl chitin and cross linking agent or chitosan is provided. The weight ratio of carboxymethyl chitin with cross linking agent is 100:0.1í½0.5, while the weight ratio of carboxymethyl chitin with chitosan is 100:10í½1000. The preparing process: carboxy methylating chitin to carboxymethyl chitin, combining with cross linking agent or chitosan to prepare carboxy methylating chitin water soluble collagen solution or acid solution, preparing to carboxy methylating chitin dry membrane, flushing and drying. The adhesion proof membrane provided by the invention has favorable tissue compatibility, favorable adhesion with body wound surface, rapid degradation rate, in addition, the degradation product can be absorbed and utilized by body without adverse reaction.

The present invention discloses a preparation method of a material for abdominal wall defect intraperitoneal repair, and the obtained material thereof. The preparation method comprises: 1, preparing a quaternized bacterial cellulose solution; 2, carrying out polydopamine modification on a polypropylene mesh sheet; and 3, coating the quaternized bacterial cellulose solution on the obtained polypropylene mesh sheet. The present invention further provides the material used for the abdominal wall defect intraperitoneal repair and obtained through the process. The obtained material of the present invention has characteristics of good mechanical property, good biocompatibility, good adhesion resistance and good antibacterial property.

The invention discloses an anti-adhesion medical composite film which is composed of a first surface layer, a second surface layer and an inner layer, wherein the inner layer is attached onto the first surface layer, and the second surface layer is attached onto the inner layer; the first surface layer and second surface layer respectively comprise the following components in parts by weight: 49-61 parts of low-density polyethylene, 38-51 parts of linear low-density polyethylene, 0.5-0.7 part of parts of and 0.04-0.06 part of lubricant; and the inner layer comprises the following components in parts by weight: 20-70 parts of low-density polyethylene and 30-80 parts of medium/high-density polyethylene. The anti-adhesion medical composite film disclosed by the invention has the advantages of stable friction factor and favorable anti-adhesion property; the medical product produced by the film does not have the adhesion phenomenon after being folded, sterilized by oxirane and the like and unfolded; and the unfolded anti-adhesion medical composite film has good transparency and favorable integral appearance effect.

The invention relates to a spandex dry spinning oil agent not containing organosilicone and a preparation method thereof. The spandex dry spinning oil agent comprises 60 to 90% of ester type compound, 0.1 to 3% of higher fatty acid salt, 0.5 to 2.5% of wetting agent, 1 to 5% of dispersant, 1 to 10% of dissolving additive, and 0.5 to 20% of anti-static agent. The spandex dry spinning oil agent has the advantages that (1) the oil agent adhered onto fiber can be easily removed, and the oil-applied spandex yarn can be laminated, compounded and adhered, and be easily and uniformly dyed; (2) by adopting the formula compounding and technology optimizing, the dispersion of metal magnesium is small, and the nanometer level can be reached; the spandex fiber has good anti-adhering and isolation properties, the anti-adhering and adhering-preventing effects are good, and the unwinding property of inner layer and outer layer is excellent; the smoothness is proper.

The invention relates to a preparation method of a polycarboxylate superplasticizer, belonging to the technical fields of building materials and cement concrete admixtures. The polycarboxylate superplasticizer is prepared by taking methylallyl polyethylene glycol and acrylamide as reaction monomers and sodium dodecyl sulfonate as a surface absorption activator, adding a chain transfer agent and an initiator, and finally, regulating the PH value to 6-7 by using an alkaline solution. The polycarboxylate superplasticizer is high in yield and good in performance; and due to the addition of sodium dodecyl sulfonate, the saturation rate of charges adsorbed by particles on a concrete surface can be increased, the flowability of cement in concrete stirring can be improved, the stirring time can be shortened, the efficiency can be increased, and an anti-adhesion effect is better taken. The polycarboxylate superplasticizer is simple in preparation process, low in cost, high in water reducing efficiency, good in cement and concrete compatibility and capable of effectively improving the flowability, slump constant, superstrength and durability of concrete.

The polypropylene film of the present invention satisfies the following formula: TM≥12.5×HST-900, where TM is the tensile modulus (MPa), and HST is the heat-sealing temperature (°C). The polypropylene film has a good balance between tensile modulus and heat sealing temperature, is less tacky, and has excellent processability, clarity and impact resistance. The invention also discloses a multi-layer polyolefin resin laminated material, wherein at least one outermost layer is made of the above-mentioned polypropylene film. The laminate has a good balance between tensile modulus and heat sealing temperature, is less tacky, and has excellent slip and antiblock properties.

The invention relates to an anti-adhesion compound dural patch and a preparation method thereof. The anti-adhesion compound dural patch comprises an anti-adhesion layer and a functional layer, wherein the anti-adhesion layer is a layer of dense membrane facing the brain; the functional layer is a layer of nanofiber membrane back to the brain; the anti-adhesion layer and the functional layer are compounded in a cross-linking mode. The invention further provides a preparation method. The preparation method comprises the steps that a layer facing the brain is designed in the dense membrane, the surface is smooth and the anti-adhesion is more effective compared with other spinning or prepared products, thus cerebrospinal fluid is effectively prevented from leaking; a layer back to the brain is a nanofiber functional layer which is beneficial for the cell attachment, promotes the cell growth, and accelerates the dural repair; and the dense membrane and the nanofiber functional layer are compounded in a cross-linking mode, wherein the anti-adhesion effect is better, the leakage problem is more avoided, and the practical value is good.

The invention discloses an antibacterial hemostatic sponge. The antibacterial hemostatic sponge comprises hyaluronic acid, polyvinyl alcohol, collagen, silk fibroin powder, chitosan, glycerin and sulfadiazine silver salt. The antibacterial hemostatic sponge which is a porous composite material has the advantages that the antibacterial hemostatic sponge is good in biocompatibility, dialysis performance, blood absorption performance, antibacterial performance, adhesion resistance and mechanical performance and high in use comfortableness, and the used sulfadiazine silver salt effectively increases the antibacterial performance of the sponge and reduces probability of wound infection.

The invention belongs to the technical field of surgery medical material, and more particularly relates to a surgery anti-adhesion agent and a preparation method thereof. The surgery anti-adhesion agent takes hyaluronic acid with the molecular weight range of 0.8*10<6>-3*10<6> daltons and the viscosity of 30dl/g-35dl/g and hydroxyl starch with the molecular weight range of 7*10<4>-6.7*10<5> daltons and the water substitution degree of 0.4-0.75 as raw materials, wherein the weight ratio between the high viscosity hyaluronic acid and the hydroxyl starch is 1:30, and the surgery anti-adhesion agent is prepared by taking physiological saline as solvent and mixing the physiological saline and the raw materials. The invention uses no chemical additive, is different from the mixture anti-adhesionagent which has conventional physical barrier and anti-adhesion effect and can be used between high polymer materials, and not only has the physical barrier, but also has the novel anti-adhesion function for preventing blood clots which cause tissue adhesion from forming. Furthermore, the surgery anti-adhesion agent is also different from the market products, and has the advantages of good anti-adhesion effect and stability.

The invention discloses a preparation method of a polyhydroxyalkanoate/polydopamine composite electrospinning film and the electrospinning film. According to the method, the polyhydroxyalkanoate electrospinning film is prepared by means of an electrospinning technology, and polydopamine (PDA) is grafted onto the surface of a polyhydroxyalkanoate fiber skeleton through chemical modification to prepare the polyhydroxyalkanoate/polydopamine composite electrospinning film. The polyhydroxyalkanoate/polydopamine composite electrospinning film prepared by means of the method has the advantages of great adhesion prevention performance, high biocompatibility and excellent mechanical properties and has a wide application prospect in the biomedical fields of tissue repairing, prevention of tissue adhesion and the like.

The invention discloses a preparation method of postoperative anti-adhesion material, which comprises the following steps: firstly reacting polyethylene glycol succinimide succinic anhydride with deacetylated hyaluronic acid, succinyl chitosan and polylysine The cross-linked active ester is prepared, and then the cross-linked active ester is reacted with methyl cellulose to form a film to obtain postoperative anti-adhesion material. The postoperative anti-adhesion material prepared by the invention has good biocompatibility, excellent mechanical properties, good injectability and rheological properties, and has relatively long residence time in the body and good anti-adhesion effect.

The invention relates to a biodegradable and bioabsorbable superfine composite fiber film, which consists of poly lactic-co-glycolic acid of the weight ratio ranging from 75wt% to 100wt% and poly latic acid-b-polyethylene glycol of the weight ratio ranging from 0wt% to 25wt%. The preparation method includes the following steps of mixing the poly lactic-co-glycolic acid and the poly latic acid-b-polyethylene glycol into N, N-dimethylformamide or acetone or mixture of the N-dimethylformamide and the acetone so as to obtain uniform polymer solution, then stirring the uniform polymer solution at room temperature to obtain uniform mixed liquid, and finally injecting the uniform mixed liquid into an electrostatic spinning device to conduct electrostatic spinning, and accordingly the poly lactic-co-glycolic acid and the poly lactic acid-b-polyethylene glycol superfine composite fiber film is obtained. The superfine composite fiber film has excellent biocompatibility and adjustable biodegradation, has the advantages of light and soft texture and fine permeability simultaneously, and can be used as excellent internal adhesion-proof materials.

The invention discloses a balloon device for preventing and treating intrauterine adhesion. The balloon device comprises a middle pipe cavity, an opening is formed in the upper end of the middle pipe cavity, an injection assembly is arranged at the lower end of the middle pipe cavity, an intrauterine water balloon which is shaped like an inverted cone after being filled with water is arranged on the portion, next to the opening, of the middle pipe cavity, the intrauterine water balloon is arranged on the upper portion of the middle pipe cavity in a surrounding mode, the intrauterine water balloon is provided with an intrauterine water injection valve in a matched mode, and the outer surface of the intrauterine water balloon is provided with an anti-adhesion membrane capable of preventing the intrauterine adhesion. By arranging the intrauterine water balloon which is shaped like the inverted cone after being filled with the water on the upper portion of the middle pipe cavity, the balloon device can be perfectly attached to the endometrium, therefore, a better anti-adhesion effect is achieved, the condition that adhesion preventing or endometrium growth promoting drugs injected into the uterine cavity flow out can be prevented, and the ascending infection risk is reduced. The balloon device can be applied to the field of medical treatment.

The invention discloses a self-adhesive PET (polyethylene glycol terephthalate) adhesive tape, which comprises the following components in parts by mass: 100 parts of basic rubber, 30 to 50 parts of micro-powder silicon, 20 to 40 parts of tackified rubber, 50 to 200 parts of micro-powder silicon dioxide, 10 to 20 parts of reinforced resin, 0.5 to 1.5 parts of vulcanizing agents, 4 to 6 parts of accelerants, and 3 to 50 parts of black carbon. According to the self-adhesive PET adhesive tape, by adding the composite micro-powder particles of the silicon dioxide and the silicon in a functional layer of the PET adhesive tape, the microscopic roughness of the surface of the adhesive tape is increased, so that a little air can be accommodated between the adhesive tapes during a winding-up period, so as to prevent the adhesive tape from adhesion and to realize the effect of easy separation; moreover, the grades of the particle sizes of the particles of the silicon dioxide and the silicon, which are added into the self-adhesive PET adhesive tape, are different; the amount of the accommodated air is large; the anti-adhesion effect is good; the procedure of the surface coating of the manufactured PET adhesive tape is omitted; the pollution, generated due to the coating, of the adhesive tape is reduced; the environment-friendly quality level and the serviceable range of the adhesive tape are increased.

The invention provides a wear-resistant anti-sticking high-strength coating, a composition for forming the wear-resistant anti-sticking high-strength coating, and a conveying device containing the wear-resistant anti-sticking high-strength coating. The composition comprises a component A and a component B, wherein the component A comprises an epoxy resin, the component B comprises a curing agent,and the curing agent comprises a polymethylene diamine modified amine curing agent and/or cashew nut shell oil modified amine curing agent. The coating formed by coating and curing the composition with the components has good wear resistance, good anti-sticking property and high strength. The composition does not contain a solvent, so that the coating forming process does not discharge VOC, and issafety and environmentally friendly.