99 results about "Anti adhesion" patented technology

The invention belongs to the technical field of hydrogel materials, and particularly relates to a Janus hydrogel patch as well as a preparation method and application thereof. The Janus hydrogel patch provided by the invention comprises an anti-adhesion layer and an adhesion layer which are laminated, the anti-adhesion layer is formed by anti-adhesion layer photosensitive ink through photocuring printing, and the anti-adhesion layer photosensitive ink comprises a first hydrogel material monomer, a hydrophilic high-molecular polymer containing a lubricating group, a first photoinitiator, a first photopolymerization inhibitor and first water; the adhesion layer is formed by photo-curing printing of adhesion layer photosensitive ink, and the adhesion layer photosensitive ink comprises a second hydrogel material monomer, a hydrophilic high-molecular polymer containing an adhesion group, a second photoinitiator, a second photopolymerization inhibitor and second water. The Janus hydrogel patch provided by the invention can realize stable adhesion and healing functions of wounds, and can effectively inhibit the postoperative adhesion problem.

The invention relates to the technical field of composite films, and particularly discloses a low-temperature heat-sealable high-strength BOPP composite film and a preparation process thereof.The BOPP composite film is prepared by adopting three-layer co-extrusion and two-way stretching processes, and the balance between high strength and low-temperature heat sealability is achieved. The composite film comprises an anti-adhesion surface layer, a core layer and a low-temperature heat-sealing layer; the anti-adhesion surface layer is prepared from the following raw materials: homo-polypropylene, a composite anti-adhesion agent, a slipping agent and PP-g-MAH; the composite anti-adhesion agent is prepared from modified silicon dioxide and modified diatomite in a mass ratio of 3 to 1; the raw materials of the core layer comprise homo-polypropylene, an antistatic agent and a coupling agent, and the raw materials of the low-temperature heat sealing layer comprise an ethylene-vinyl acetate copolymer, PP-g-MAH, a polyolefin elastomer, POE-g-MAH, a modified nucleating agent and an antioxidant, so that the balance of high strength and low-temperature heat sealability is realized, interlayer performance complementation is realized, the mechanical strength is improved, the heat sealing temperature is reduced, and the service life is prolonged. The overall peel strength is improved, and no layering phenomenon exists during stretching.

The invention relates to an artificial periosteum suitable for a complex bone surface. The artificial periosteum is an integrated single-layer membrane. The artificial periosteum is provided with an anti-adhesion area, a directional pore channel structure area and a bone contact area which are sequentially distributed in the thickness direction. The directional pore channels are sequentially filled with composite hydrogel for filling bone surface pores and promoting bone repair and bonding gel for bonding bone surfaces in the extending direction of the directional pore channels; an expanding agent and prestretching memory polymer fibers are dispersed in a matrix of the artificial periosteum; the expanding agent is enriched in the matrix of the directional pore channel structure area and the bone contact area and is used for driving the composite hydrogel to leave the directional pore channel so as to seal bone surface gaps or cracks; and the pre-stretched memory polymer fibers are enriched in the matrix of the anti-adhesion area and are used for limiting the expansion direction of the expanding agent. The artificial periosteum can solve the technical problems that in the prior art, the attaching effect of the artificial periosteum on the complex bone surface is poor, and the long-term reliability is poor.

The invention relates to the field of semiconductors, and discloses an anti-adhesion fluorinated silicone rubber mixture and a preparation method thereof, and the anti-adhesion fluorinated silicone rubber mixture comprises the following components based on 100 parts by weight of the anti-adhesion fluorinated silicone rubber mixture: 100 parts by weight of fluorinated silicone rubber; 10 to 30 parts by weight of white carbon black; 3-10 parts by weight of hydroxyl silicone oil; 1-5 parts by weight of 2, 5-dimethyl-2, 5-dihexane, and 1-5 parts by weight of 2, 5-dimethyl-2, 5-dihexane; and 3-20 parts by weight of PFA resin. According to the invention, the content-controllable PFA resin microparticles are introduced into a fluorosilicone rubber matrix, and peroxide crosslinking and post-heat treatment are matched, so that a built-in anti-adhesion interface is realized, long-term heat resistance, medium resistance and low stripping force are considered, and the technical problem that the fluorosilicone rubber is easy to adhere to a base material after being attached to the base material for a long time is solved.

The present invention aims to provide a laminate for paper containers that is excellent in crease resistance, alcohol resistance, adhesion, and blocking resistance. [Solution] The above problem is solved by a laminate for paper containers having a heat seal layer, a paper substrate, a printing layer, and a surface protection layer in that order, wherein the basis weight of the paper substrate is 100 g / m². 2 The above is resolved by a laminate in which the printed layer contains a urethane resin (A) and the surface protective layer contains a cellulose resin (B) and an alkyd resin (C), or by a laminate in which the molecular weight distribution (Mw / Mn) of the alkyd resin (C) is 5 to 20.

An article has a finished fabric having two finished surfaces. A non-foamed aqueous composition is applied directly to one or both finished surfaces to provide a flock substitute at a dry coverage of 0.5-15 g / m2 per finished surface. This flock substitute improves anti-blocking characteristic and masks any tacky feel of the treated finished surface. The non-foamed aqueous composition has 0.5-20% solids and includes: (i) hollow glass particles of 5-100 μm average particle size in an amount of 0.25-20 weight %, and which have a crush strength >50 MPa; (ii) a water-soluble or water-dispersible film-forming organic polymeric binder that has a Tg of less than 25° C.; (iii) a crosslinking agent if needed; and (iv) porous particles in an amount of less than 0.1 weight %. The weight ratio of the (i) hollow glass particles to the (ii) water-soluble or water-dispersible film-forming organic polymeric binder can be from 1:5 to 10:1.

The invention provides a developable composite hernia patch as well as a preparation method and application thereof. The developable composite hernia patch comprises a polypropylene patch, and modified fluorine-containing polyarylether and a modified developer which are compounded on the polypropylene patch. Modified fluorine-containing polyarylether grafted with a polyethylene glycol side chain is introduced to the polypropylene patch, and the polyethylene glycol side chain has hydrophilicity and is easy to form a hydration layer, so that the developable composite hernia patch is endowed with excellent anti-adhesion performance. Furthermore, a modified developing agent connected with the modified fluorine-containing polyarylether through a hydrogen bond is introduced, so that the developing agent can be uniformly dispersed, and the position and state of the developable composite hernia patch can be better observed through an imaging means. Through characterization and testing, the developable composite hernia patch provided by the invention has excellent anti-adhesion performance and observability.

The invention belongs to the technical field of BOPP (biaxially-oriented polypropylene) pre-coating films, and particularly relates to an anti-yellowing and anti-adhesion BOPP pre-coating film as well as a preparation method and application thereof. The anti-yellowing and anti-adhesion BOPP pre-coating film sequentially comprises a base material layer, a glue layer and a hot melt adhesive layer from outside to inside, the base material layer is a biaxially oriented polypropylene film; the glue layer is prepared from the following raw materials in percentage by mass: 0.1%-15% of glue, 0.1%-10% of a coupling agent, 50%-80% of water, 20%-50% of alcohol and 1%-5% of an antioxidant; the hot melt adhesive layer is prepared from the following raw materials in percentage by mass: 70%-95% of a hot melt adhesive main material and 5%-30% of a compatilizer. The anti-yellowing and anti-adhesion requirements of BOPP in the prior art are met, the technological operation is simple, and good industrial practicability is achieved.

The invention relates to the technical field of coatings, in particular to a high-adhesion-resistance and yellowing-resistance PU matte top-coat and a preparation method thereof.The high-adhesion-resistance and yellowing-resistance PU matte top-coat is prepared from hydroxyl acrylic resin with the OH value being 80 and the Tg point being 20 and hydroxyl acrylic resin with the OH value being 36 and the Tg being-10, and the hydroxyl acrylic resin and the hydroxyl acrylic resin are used for balancing the crosslinking density and flexibility; therefore, the anti-yellowing and anti-blocking coating has both yellowing resistance and anti-blocking property. According to the invention, the problem of adhesion of large-panel furniture in the Middle East countries can be well solved, the problem of yellowing caused by weather conditions of strong sunlight in the Middle East countries can also be overcome, and meanwhile, the problem of stacking of large-area furniture in a furniture factory can also be solved.

The invention relates to the technical field of friction materials, and discloses a stable-size and anti-adhesion friction material for an electromagnetic brake and a preparation method of the friction material. The friction material comprises the following raw materials: benzoxazine, bismaleimide, cyanate resin, butyronitrile rubber powder, zinc fibers, modified bamboo fibers, ceramic fibers, silicon carbide whiskers, calcium sulfate whiskers, modified poly (p-phenylene benzobisoxazole) pulp, calcined kaolin, precipitated barium sulfate, magnesium oxide and cashew nut shell oil modified phenolic resin coated amorphous silicon dioxide. The invention also discloses a preparation method of the modified layered magnesium phosphate. The friction material disclosed by the invention has excellent dimensional stability under damp and hot conditions and can avoid rusting of mating plates, so that adhesion and corrosion are avoided.

The utility model discloses a tool for testing leakage and adhesion of a rubber sealing element, which integrates a leakage test function and an adhesion test function, simulates the actual working environment of the sealing element by using a test medium supply system capable of accurately controlling pressure, and drives a pressing plate assembly with a profiling pressing head through a lifting mechanism. Automatic pressing and separation of the sealing element in a simulated assembly state are achieved, comprehensive detection of the sealing performance and the anti-adhesion characteristic of the rubber sealing element can be completed without a machine, and pressure attenuation and separation force of a test medium are monitored in real time through a pressure sensor and a tension sensor. According to the invention, quantitative judgment on leakage and adhesion degree is realized, so that the detection capability and the evaluation accuracy of early quality defects of the rubber sealing element are remarkably improved, a reliable basis is provided for quality control and process optimization in the production process, and the delivery quality and the use reliability of products are fundamentally guaranteed.

The invention discloses an anti-adhesion treatment technology based on PDMS (Polydimethylsiloxane) secondary mold reversing. The method specifically comprises the following steps: preparing a three-dimensional microstructure mother set by using a gray photoetching technology, pouring a PDMS mixing agent into the mother set, curing to obtain a first PDMS reverse mold, placing the first PDMS reverse mold on a glass slide, spin-coating a layer of thinner acetone film on the first PDMS reverse mold by using a spin coater, pouring a layer of PDMS mixing agent, heating and curing, soaking the whole structure in ethanol, and drying to obtain the three-dimensional microstructure. And separating the two layers of PDMS to obtain a second PDMS reverse mold, and cleaning the second PDMS reverse mold to obtain a PDMS copy reverse mold with a three-dimensional microstructure. In the method, the acetone film layer has an anti-adhesion effect, secondary demolding becomes easy after ethanol soaking, and the method is simple to operate and low in cost.

The invention relates to the technical field of functional composite materials, and discloses an anti-adhesion master batch for a biaxially oriented film and a preparation process of the anti-adhesion master batch for the biaxially oriented film, and the preparation process comprises the following steps: pre-mixing mesoporous silica with specific pore diameter, pore volume and particle size with homo-polypropylene particles, feeding into a co-rotating twin-screw extruder provided with a zero-pressure conveying area and a wide-gap kneading block, and extruding to obtain the anti-adhesion master batch for the biaxially oriented film. The melt temperature is controlled to be 230-270, and the rotating speed of a screw is adjusted so that the average retention time of the material can be within the range of 120-150 s. According to the preparation method, the melt viscosity is adjusted and controlled through an infiltration dynamic window, polypropylene chain segments are migrated into silicon dioxide pores through capillary pressure, the infiltration depth is limited, and a radial refractive index gradient transition layer is constructed on the peripheral side of the anti-blocking agent; abrupt change of phase interface refractive index is eliminated, visible light scattering is inhibited, and the technical problem of mutual restriction of anti-adhesion performance and optical transparency is solved.

The invention provides a fiber membrane for preventing postoperative adhesion and a preparation method thereof, and the fiber membrane comprises the following membrane layers: a degradable polyester layer prepared from degradable polyester and a photoinitiator; and the anti-adhesion membrane layer is prepared from a zwitterionic polymer. The fiber membrane provided by the invention is relatively low in use cost, relatively high in accessibility and excellent in mechanical property. A good anti-adhesion physical barrier is provided for tissues, tissue adhesion can be well prevented, and a simple, convenient and economical novel method is provided for postoperative tissue adhesion prevention.

The invention relates to a self-drying gel. The self-drying gel is prepared from the following raw materials: cationic imidazolium salt, dopamine hydrochloride, a carboxyl ammonium zwitterionic monomer and carboxyl chitosan. The self-drying gel provided by the invention has the advantages of coating formation, in-situ self-drying, adhesion resistance, good biocompatibility and high immunocompatibility, so that secondary injury is not easily caused during clinical replacement, and wound repair can be promoted by adjusting immune response.

The invention relates to the technical field of protective films, and provides a protective film for acrylic process protection and a preparation method thereof. The protective film provided by the invention comprises an outer layer, a middle layer and an inner layer which are sequentially arranged, the preparation raw materials of the outer layer comprise metallocene low-density polyethylene and KN resin, the preparation raw materials of the middle layer comprise low-density polyethylene and high-density polyethylene, and the preparation raw materials of the inner layer comprise low-density polyethylene and anti-adhesion master batch. The protective film provided by the invention is good in adhesive force and high in elastic modulus, can be tightly attached to the acrylic surface, is not easy to warp, can realize process protection of an acrylic plate, prevents the acrylic plate from being damaged in the transportation or subsequent processing process, and improves the yield.

The application discloses a preparation method and application of an anti-adhesion nano composite drug delivery system, relates to the technical field of adhesives, and discloses the following technical scheme: polyacrylamide and aldehyde functionalized starch with a preset mass ratio are taken, different amounts of zeolite imidazolate framework materials are added after mixing, and then the mixture after mixing is ground and sieved to obtain the anti-adhesion nano composite drug delivery system. The application can be used as a peritoneal tumor local drug delivery system, has high drug encapsulation efficiency and drug loading rate, can release antitumor drugs in tumor tissues specifically, continuously and stably through a tumor acid microenvironment, prolongs the exposure time of the drugs, improves the curative effect of the drugs, reduces the side effects of chemotherapy, can reshape an immune microenvironment, has a good killing effect on tumor cells, and has no systemic toxicity; meanwhile, the gel powder forms a physical barrier on a surgical wound after being changed into a gel by water, so that abdominal cavity adhesion caused by surgical trauma and chemotherapy can be reduced.

The present application relates to the field of extinction film, in particular to a kind of antiskid extinction film and preparation method thereof, to solve the poor antiskid performance of existing extinction film, easily leading to packaging sliding, unstable stacking problem;The antiskid extinction film is composed of four-layer structure that anti-adhesion layer, support layer, connecting layer and extinction layer are sequentially stacked and co-extruded;The preparation method uses modified polypropylene, composite modified antiskid particle as modified raw material to modify the extinction layer of the lowermost layer of antiskid extinction film, uses modified polypropylene to improve the adhesion and flexibility of antiskid extinction film, uses composite modified antiskid particle to build composite rough structure, significantly increases the surface friction coefficient under the synergistic effect of the two, so as to give the excellent antiskid performance of antiskid extinction film, which can effectively prevent packaging sliding, stacking collapse.

To provide a polyurethane aqueous dispersion capable of improving adhesion of a coating film to a resin and blocking resistance.SOLUTION: The polyurethane aqueous dispersion according to an embodiment is obtained by dispersing a polyurethane resin (A) containing an aromatic polyester polyol as a constituent in an aqueous dispersion medium and contains an oxazoline group-containing water-soluble polymer (B). The polyurethane resin (A) has carboxy groups and has an acid value of 5-25 mg KOH / g. The polyurethane aqueous dispersion contains 120-300 moles of oxazoline groups of the oxazoline group-containing water-soluble polymer (B) based on 100 moles of carboxy groups of the polyurethane resin (A).SELECTED DRAWING: None

The application discloses a method for detecting the anti-adhesion performance of cigarettes, comprising the following operation steps: S1, placing a cigarette sample to be detected into a xenon lamp weatherometer; S2, setting the illumination conditions, temperature and humidity parameters of the xenon lamp weatherometer to simulate the actual environment of the cigarettes in the transportation and sales process; S3, exposing the cigarette sample to the environment for a certain period of time under the set environmental conditions; S4, taking out the cigarette sample after the exposure treatment, observing and recording the adhesion of the cigarette, and evaluating the anti-adhesion performance of the cigarette sample according to the observation result. The method for detecting the anti-adhesion performance of cigarettes can simulate the transportation and sales environment by using the xenon lamp weatherometer, and can realize the detection of the anti-adhesion performance of the cigarette.

The invention provides sulfoxide modified hyaluronic acid as well as a preparation method and application thereof, and belongs to the technical field of biomedical materials. The sulfoxide modified hyaluronic acid provided by the invention has a structural unit as shown in a formula I, wherein R1 is C1-C3 alkyl; the weight-average molecular weight of the hyaluronic acid corresponding to the sulfoxide modified hyaluronic acid is 10000 to 2000000; the grafting rate of a sulfoxide group in the sulfoxide modified hyaluronic acid is 10 to 60 percent. The sulfoxide modified hyaluronic acid provided by the invention has an excellent anti-adhesion effect, can be suitable for minimally invasive surgeries such as laparoscopic surgeries, and can also cope with severe injury surgeries such as adhesion debonding surgeries. # imgabs0 #

The present invention provides a hot melt adhesive for a non-peeling type sealing tape and its production process. The present invention belongs to the technical field of hot melt adhesives, and relates to a hot melt adhesive for a non-peeling type sealing tape and its production process. The hot melt adhesive comprises: 20 - 35 parts of a matrix resin, 10 - 25 parts of a styrene-based thermoplastic elastomer composition, 30 - 50 parts of a tackifying resin, 15 - 30 parts of a viscosity regulator, 0.5 - 1.5 parts of an anti-sticking agent, and 0.2 - 1.0 parts of an antioxidant. The beneficial effects of the present invention are as follows: compared with the prior art, firstly, when the hot melt adhesive of the present invention is coated into a tape, the amide will migrate to the surface of the adhesive layer and arrange into an approximate monolayer with a low surface energy, thereby achieving the anti-adhesion effect, that is, it can prevent the adhesive particles from sticking and caking, and can also improve the tape unwinding performance, without the need to attach an isolation material, achieving the effect of non-peeling use; secondly, the low-temperature resistance of the hot melt adhesive is improved, so that the product can still maintain good adhesion in a low-temperature environment.

To provide an adhesive film excellent in blocking resistance and a reel body.SOLUTION: An adhesive film comprising a first adhesive layer containing a first adhesive component and a plurality of electrically conductive particles, wherein the plurality of electrically conductive particles include a first electrically conductive particle which is a dendritic electrically conductive particle, and a second electrically conductive particle which is an electrically conductive particle other than the first electrically conductive particle and has an electrically non-conductive core body and an electrically conductive layer provided on the core body, and a part of the plurality of electrically conductive particles is disposed so as to protrude from one surface of the first adhesive layer. A reel body comprising: a winding core; and an adhesive tape wound around the winding core, wherein the adhesive tape includes a support body and the adhesive film, and the adhesive film is provided on the support body such that the other surface of the first adhesive layer faces the support body.SELECTED DRAWING: None

A soft tissue repair graft (500) is described that includes an anti-adhesion layer (502), a structural layer, and a positioning layer. These layers can be distinct or integrated into one substrate. The term "layer" is used to distinguish the function of the tissue repair graft, not to distinguish different layers of material. Different functional layers can include a single plane of material.

To provide a water-based overprint varnish for a shrink label, excellent in adhesion, moist friction properties and anti-blocking properties, and capable of forming a coating film suppressed in whitening at heat shrinkage on various substrates to be printed.SOLUTION: A water-based overprint varnish for a shrink label contains a binder resin, water and a water-soluble organic solvent. The binder resin is a polymer which includes a constitutional unit (i) represented by the following formula (1), and having a carboxy group, and has a number-average molecular weight of 15,000-50,000, and at least a part of the carboxy group in the constitutional unit (i) is neutralized by an alkaline substance and is self-emulsified to form emulsion particles.SELECTED DRAWING: None

This invention discloses a double-sided hydrogel with hemostatic, anti-adhesion, and wound repair properties, as well as its preparation and application, belonging to the field of biomedical materials technology. The double-sided hydrogel comprises a repair layer and an anti-adhesion layer. The repair layer is a hydrogel formed by photocuring with OHA, GelMA, AAc, AAc-NHS, and p(APMA-co-THMA) as core components. p(APMA-co-THMA) is obtained by polymerizing THMA and APMA. The anti-adhesion layer is formed by immersing one side of the repair layer in an aqueous solution containing SBMA, GelMA, and MBAA, followed by a thermal cross-linking reaction. The double-sided hydrogel provided by this invention possesses ideal mechanical properties and wet adhesion ability, and exerts anti-inflammatory and wound-healing effects on liver wounds, which can solve the problems of postoperative bleeding, adhesion, and liver regeneration disorders after partial hepatectomy in clinical practice.

To provide an aqueous varnish composition for gravure printing or flexographic printing, which is excellent in adhesion to polyolefin films, acid resistance, and blocking resistance, can form a coating film having abrasion resistance that can withstand friction with rubber, and has excellent storage stability, and to provide a laminate and a packaging material using the same. [Solution] An aqueous varnish composition for gravure printing or flexographic printing, containing a (meth)acrylic resin emulsion (A), a modified polypropylene resin emulsion (B), and an aqueous medium (C), wherein the acid value of (A) is 60 mgKOH / g or less, the average particle size is 0.038 to 0.300 μm, the acid value of (B) is 60 mgKOH / g or less, the difference between the acid values ​​of (A) and (B) satisfies a specific relationship, the content of (B) converted to solids is 1.6 to 15.0 mass%, and the mass ratio, converted to solids, represented by (B) / (A) is 0.020 to 0.180.

The application discloses a kind of water-based acrylic coating and its preparation method and application, belong to water-based paint technical field.The water-based acrylic coating provided by the application includes the following mass fraction of preparation raw materials: 18~32 parts of water-based acrylic resin, 0.5~8 parts of pigment, 40~65 parts of filler, 5~30 parts of water, 0.05~0.8 parts of thickening agent, 0.3~1.5 parts of dispersing agent, 0.3~1.5 parts of defoaming agent, 0.8~1.8 parts of film-forming aid;The color base ratio of the coating is 4.2~5.2.The application starts from the three angles of improving coating hardness, constructing rough surface and reducing coating cohesion, uses water-based acrylic coating with high color base ratio, which can effectively improve coating hardness, reduce the contact area after coating close, reduce surface force and cohesion, thereby prevent the adhesion of water-based acrylic coating when stacking contact, improve the anti-adhesion effect of water-based acrylic coating, and the water-based acrylic coating of the application has wide application in material protection, especially metal material protection.