46 results about "Anti adhesion" patented technology

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 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 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 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 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.

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.

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.

The utility model discloses an anti -adhesion aluminium foil paper, include: aluminium foil layer, one side of aluminium foil layer is connected through the adhesion layer and is connected with the backing paper layer, the other side of backing paper layer is provided with ink layer, the other side of ink layer is provided with varnish layer, the other side of varnish layer is provided with the layer of velvet feeling, through setting up the one side of varnish layer and set up the layer of velvet feeling, as the connecting layer of layer of velvet feeling and ink layer, can promote the printing effect of the ink of layer of velvet feeling, can absorb part velvet feeling resin and thereby improve the anti -adhesion performance of aluminium foil paper simultaneously.

This utility model discloses a stir-fry ingredient container, relating to the field of stir-fry container design technology. It includes a container body with a large compartment and multiple small compartments. Multiple anti-adhesion protrusions are evenly distributed on the inner walls of both the large and small compartments to prevent sticky materials from adhering to the inner walls and falling out of the container. This utility model, by providing a large compartment and multiple small compartments within the container, allows for precise portioning of the ingredients to be stir-fried. Furthermore, the multiple anti-adhesion protrusions on the inner walls of both the large and small compartments prevent the ingredients from sticking together.

The invention discloses an efficient anti-adhesion opening master batch for a polypropylene film and a preparation method of the efficient anti-adhesion opening master batch, and belongs to the technical field of high polymer materials. The efficient anti-adhesion opening master batch for the polypropylene film is used for solving the technical problems that in an anti-adhesion opening master batch system for the polypropylene film in the prior art, inorganic anti-adhesion particles and a polypropylene matrix are poor in compatibility and prone to falling off, and the long-acting stability of the anti-adhesion performance is insufficient. Adding epoxy modified silicon dioxide and undecylenol into N, N-dimethylformamide, and heating for reaction to obtain modified silicon dioxide; in an inert gas atmosphere, adding the modified silicon dioxide, HTSO and a catalyst into a solvent, and heating for reaction to obtain modified silicon dioxide grafted HTSO; the high-efficiency anti-adhesion opening master batch for the polypropylene film, which is prepared by the preparation method disclosed by the invention, not only has good compatibility with a polypropylene matrix and long-acting and stable anti-adhesion performance, but also has good transparency, and the application range is widened.

The waterborne polyurethane composition is hydroxyl-terminated waterborne polyurethane, the refractive index of the waterborne polyurethane composition is larger than 1.55, and the glass transition temperature Tg of the waterborne polyurethane composition is larger than 85 DEG C. The waterborne polyurethane composition prepared by the preparation method disclosed by the invention has excellent stability, high glass transition temperature and excellent adhesion resistance and adhesion performance.

The invention relates to the technical field of flexible display, and particularly discloses an ultrathin flexible brightness enhancement film and a roll-to-roll production process thereof. The ultrathin flexible brightness enhancement film comprises a PET / PI base material layer with the thickness of 20-50 [mu] m, a gradient brightening layer of 5-15 [mu] m; a 1-3 [mu] m anti-reflection layer; a 0.5-3 [mu] m composite protective layer; the preparation method comprises the steps of base material unwinding, plasma activating treatment, gradient coating of a PMMA solution containing nanoparticles, synchronous imprinting of the prism array and deposition of the anti-reflection layer, partitioned ultraviolet curing, electrostatic spraying of the protection layer, online detection and anti-adhesion winding. The ultrathin flexible brightness enhancement film can be used for a flexible display device, and has the advantages of low reflectivity, high brightness gain and excellent mechanical flexibility; in addition, the preparation method has the advantages of high-efficiency and low-cost large-scale production through a roll-to-roll continuous process.

This invention relates to the field of multilayer curable base film technology, specifically to the online coating of polyester optically curable base films and its preparation method. This invention overcomes the problem in existing technologies where the adhesion and optical performance of the curable base film cannot be simultaneously achieved. First, this invention obtains core-shell structured functional particles by modifying in-situ polymethyl methacrylate with nano-silica; second, it obtains modified PET by melt blending optical-grade PET chips; finally, it melts the functional particles and modified PET to obtain an anti-adhesion masterbatch, prepares a composite base film through three-layer co-extrusion and biaxial stretching, coats it with a functional coating liquid, cures it stepwise to form a curing layer, and then heat-sets it to obtain the optically curable base film. Through base film modification, functional particle core-shell design, three-layer co-extrusion structure, and the synergistic effect of coating and process, this invention produces a polyester optically curable base film that combines high optical performance and good coating adhesion, applicable to release protection in the electronics field, decoration in the home appliance field, and other fields.

The present invention provides a laminate that exhibits blocking resistance, good adhesion and lamination strength between the anchor coat layer and the vapor-deposited layer, retort resistance, and gas barrier properties, particularly good gas barrier properties even after retort processing. [Solution] A laminate comprising, at least in this order, an anchor coat layer with a thickness of 0.05 to 1.5 μm, a vapor deposition layer, and a barrier coat layer on a polyolefin substrate, wherein the anchor coat layer is a layer comprising a resin material containing methyl (meth)acrylate and a polar group-containing (meth)acrylic acid ester or (meth)acrylic acid, a curing agent, and an anchor coat agent containing a silane coupling agent, and the polar group in the resin material is at least one polar group selected from hydroxyl groups, amide groups, amino groups, phosphoric acid groups, and epoxy groups. The silane coupling agent is a silane coupling agent containing at least one group selected from a nitrogen atom-containing group, a sulfur atom-containing group, and a vinyl group, and the mixing ratio of the (meth)acrylate and the polar group-containing (meth)acrylate ester or (meth)acrylic acid is 5 or more and less than 900 parts polar group-containing (meth)acrylate ester or (meth)acrylic acid per 100 parts methyl (meth)acrylate, and the contact angle of the anchor coat layer surface is 20 degrees or more and 75 degrees or less.

The invention discloses a modular intraocular implantation device, which is suitable for non-crystalline-lens eyes, crystalline lens dislocation with or without iris defect or dysplasia with refractive correction and intraocular structure reconstruction requirements, and comprises a tension balance mechanism, an open cystic structure and a simulated iris structure. The tension balancing mechanism is made of biological elastic materials, and sclera fixing units are arranged in the circumferential direction. The open bag-shaped structure is provided with an open space, the inner surface is provided with micron-sized anti-slip textures to prevent rotation, the edge of an opening is provided with an anti-adhesion supporting structure, a hole is reserved in the center of a posterior bag, and communication holes can be formed in the periphery of the front surface to communicate anterior and posterior chambers, drain aqueous humor and balance intraocular pressure. Point supporting is upgraded into face supporting and ring supporting, automatic centering is achieved through uniform radial force of the ring, and long-term stability is remarkably improved through multi-point positioning. The modular design supports the operation strategy of staged implantation, and an innovative solution is provided for meeting the individualized treatment requirements of complex anterior segment lesion cases.

The application discloses a starch-based bioadhesive and a preparation method and application thereof, and belongs to the technical field of biomedical materials. The adhesive aims to solve the technical problem that the existing bioadhesive cannot simultaneously realize strong wet-state tissue sealing and effective postoperative anti-adhesion. The starch derivative with a spiral cavity structure is used as a host, and a polymer containing a hydrophobic chain segment is used as a guest to pre-construct a "slidable topological entanglement network" through host-guest interaction, and the network is permanently fixed through light-induced covalent cross-linking. The unique structure enables the material to have excellent mechanical properties, strong wet-state adhesion (maintaining high adhesion strength to various tissues under various extreme physiological environments) and inherent anti-adhesion function (realized through a dense physical barrier). The adhesive can be in-situ formed by injection, is simple to operate, and has a wide application prospect in various surgical operations, such as gastrointestinal perforation repair, corneal laceration suture, internal organ hemostasis and the like, which require reliable sealing and anti-adhesion.

The invention belongs to the technical field of biomedical materials, and provides a spraying type anti-adhesion Janus heterogeneous hydrogel film used after cholecystectomy and a preparation method of the spraying type anti-adhesion Janus heterogeneous hydrogel film. The system is prepared from a tube A cationic sulfobetaine-quaternized chitosan (QCS-SB) solution and a tube B cationic sulfobetaine-quaternized chitosan (QCS-SB) solution, wherein the QCS-SB solution contains temperature-sensitive lipidosome for packaging diphenhydramine and blood coagulation peptide; and a cartridge B anionic polycarboxy betaine (PCB-AA) solution, wherein the cartridge B anionic polycarboxy betaine (PCB-AA) solution contains calcium alginate microspheres loaded with a cholic acid adsorbent. In the operation, after the gel is synchronously sprayed to an irregular wound surface through a double-barrel spray gun, a double-layer hydrogel film is rapidly formed through electrostatic self-assembly, wet-state strong adhesion and body temperature triggered drug release are achieved on the cation function side, and a super-lubricating surface is constructed on the anion function side and actively captures bile acid. The material has the functions of physical barrier, chemical adsorption and pharmacological intervention, the postoperative adhesion rate and the allergy occurrence rate can be remarkably reduced, and an intelligent, accurate and degradable barrier solution is provided for general surgery operations.

The invention relates to the technical field of polymer material preparation, and provides an acrylic emulsion suitable for a pre-coating type riveting sealant and a preparation method of the acrylic emulsion. The emulsion takes water as a dispersion medium, and is prepared from the following components in parts by mass: 40 to 50 parts of water, 30 to 45 parts of soft monomer, 8 to 15 parts of hard monomer, 0.5 to 2 parts of crosslinking monomer, 0.8 to 1.5 parts of polymerizable phosphorus-containing monomer, 0.5 to 1.5 parts of hydrophilic unsaturated organic acid monomer, 0.6 to 1.2 parts of emulsifier, 0.1 to 0.3 part of oxidation initiator and 0.1 to 0.3 part of reduction initiator. And the glass transition temperature of the synthesized emulsion is 10-30 DEG C. A redox initiation system of ammonium persulfate / sodium hydrogen sulfite or tert-butyl hydroperoxide / sodium formaldehyde sulfoxylate is adopted, and pre-emulsification, dropwise addition polymerization and post-treatment are carried out to prepare the water-soluble polymer. The pre-coating type riveting sealant prepared from the emulsion has high adhesive force to a metal substrate, good air tightness after riveting, good dispensing leveling property, good anti-adhesion and heat storage stability, and is suitable for automatic dispensing.

The invention relates to the technical field of composite films, in particular to a high-barrier cooking-resistant composite base film and a preparation method thereof. The composite base film sequentially comprises a printing layer, an anti-adhesion blocking layer, an aluminum oxide layer and a heat sealing layer from the surface to the inner layer. The anti-adhesion barrier layer comprises polyvinyl alcohol, polyethylene glycol and borax; the heat sealing layer is a modified polypropylene film, and the modified polypropylene film is modified by maleic anhydride grafted polypropylene and nano CaCO3. According to the high-barrier cooking-resistant composite base film, the anti-adhesion barrier layer and the aluminum oxide layer are arranged on the surface of the BOPP base film, the anti-adhesion barrier layer contains a double-polymer network composed of polyvinyl alcohol-borax and polyethylene glycol, and the barrier property is improved on the premise that the transparency of the film is not affected.

An article is prepared to have a finished fabric with finished surfaces and a treatment on at least one of the finished surfaces, which treatment is a dry non-foamed aqueous composition applied as a flock substitute at 0.5-15 g / m2. This flock improves anti-blocking and masks any tacky feel of the treated finished surface. The dry non-foamed aqueous composition includes: (i) hollow glass particles of 5-100 µm average particle size in an amount of 10-99 weight %, which hollow glass particles have an impact (crush) strength of >50 MPa; (ii) a water-soluble or water-dispersible film-forming organic polymeric binder with a Tg of less than 25℃; (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 is from 1:5 to and including 10:1.