290 results about "Swelling ratio" patented technology

A paper packaging container is formed from the packaging material comprising constitution layers of at least an outside thermoplastic material layer, a paper substrate layer, and an inside thermoplastic material layer, wherein the inside thermoplastic material layer contains at least a linear low density polyethylene, and has properties parameters of an average density of 0.900–0.930, a predetermined peak melting point, a melt flow index of 5–15, and a swelling ratio of 1.3–1.8. The use of the packaging material allows easy filling and packaging to the packaging container and quick heat sealing, and results in more toughly and strongly sealed container, and the material can be used for achieved good sealing independently of the temperature of food contents and thus maintaining the non-scalping and quality preservability of the content product.

This invention provides an embolization material used for blocking a blood vessel in vivo for stopping the blood flow. The most suitable embolization material has a water swelling ratio of 30% or more, is degradable in a phosphate buffered saline, is formed as virtually spherical particles, and is preferably composed of a water insoluble poly(ethylene glycol) copolymer, wherein when the film formed from said polymer is saturated with water, it has an elastic modulus in tension of 1500 MPa or less. The embolization material of this invention can reliably block a blood vessel at an intended site without causing cohesion or clogging in a catheter or in the blood vessel at other than the intended site. Thereafter, the blocked site concerned can be liberated from the embolized state by degradation, and the degraded components can be metabolized or excreted outside the body.

The invention discloses a biodegradable medical hydrogel and a preparation method and application of the hydrogel, and particularly discloses a biodegradable medical hydrogel which is formed by in-situ crosslinking and shaping. The gelation time of the hydrogel is less than 20s, the swelling rate is 0-600%, the fracture strength is not less than 50mmHg, the time of beginning degradation is 3-40d and the degradation time is 7-180d. The raw materials for preparing the hydrogel comprise a first compound component containing a nucleophilic functional group and a second compound component containing an electrophilic functional group, and the two components are physically mixed by a mixing tool and subjected to covalent crosslinking to form the hydrogel. The physical property and biodegradability of the hydrogel can be adjusted by changing the ratio of compound components of the first component or the second component; and the hydrogel is controllable in performance and simple to operate, and can be used for organism environments of different parts.

The present invention relates to an acrylic pressure sensitive adhesive composition comprising (meth)acrylic copolymers including alkyl(meth)acrylic acid ester monomer having 1˜12 carbon atoms of alkyl group, characterized in that the gel content is 10˜55%, the swelling ratio is 30˜110, the weight average molecular weight of sol eluted from the adhesive by ethyl acetate is at least 800,000, the molecular weight distribution is 2.0˜7.0; and a polarizer and a liquid crystal display comprising the above composition show excellent durability under a high temperature and humidity condition, and can improve the light leakage phenomenon and provide excellent operability at the time of manufacturing polarizer by effectively providing high modulus and stress release property.

The invention relates to a cement-based grouting material used for strengthening repairing as well as a preparation method and application thereof. The cement-based grouting material comprises the following components in parts by weight: 300-500 parts of cement, 200-300 parts of admixtures, 300-400 parts of fillers, 3-6 parts of water-reducing components, 0.1-1 part of plastic swelling component, 10-20 parts of hardened swelling components, 0.01-0.2 part of stable component, 1-4 parts of early strength components, 0.2-2 parts of defoaming components and 0.01-0.2 parts of emulsifying component. The cement-based grouting material disclosed by the invention has performance advantages such as higher injection-molding performance, initial fluidity not greater than 17s, impermeability not exceeding 1mm, wear resistance not exceeding 10cm<3> / cm<2>, compressive strength within 2 hours not lower than 5MPa, compressive strength within 1 day not lower than 30 MPa, and the like. The cement-based grouting material has composite swelling, the free swelling ratio within 3 hours is 0.02%-2% and grouting is full and dense; the viscosity is low, the volume stability is good and durability is good; the cement-based grouting material does not contain VOC (volatile organic compounds), and is environment-friendly.

The present invention relates to an organic-inorganic composite high-molecular microsphere with multiple response property and its preparation method. Said method includes the following steps: using alkyl metasilicate as precursor, utilizing gel-sol process to prepare magnetic nano granules covered with silicon dioxide, and using silicane coupling agent to make surface modification, then adopting template polymerization process, using the above-mentioned magnetic nano granules as seed and using isopropyl acrylamide or its derivative as main monomer, and using acrylic acid or its salt as functional monomer and controlling the dose of main monomer, functional monomer and crosslinking agent to prepare the organic-inorganic composite high-molecular microsphere with different swelling ratios.

This invention relates to the laminated material for food packaging, and its manufacturing process. The laminated material (10) consists of the quality keeping intermediate layer (12) laminated inside the paper core layer (11) and the core layer and the heat sealable innermost layer (13). The quality keeping intermediate layer comprises of an extrusion coatable blend polymer consisting of polymer component A 50-95% of nylon-MXD6 or EVOH and, polymer component B 5-50% of nylon 6, nylon 6, the blends or PET. The quality keeping intermediate layer is extruded and laminated directly in the core layer, the innermost layer contains at least the linear low density polyethylene which has a narrow molecular weight distribution, and has the properties parameter of mean density of 0.910-0.925, 100-122 degrees C. peak melting point, melt flow index of 5-20, swelling ratio (SR) of 1.4-1.6, and 5-50 micrometer layer thickness.The hardness, production efficiency, and cost performance of the barrier packaging container formed by the packaging material are improved.

The present invention relates to an acrylic pressure sensitive adhesive composition comprising acrylic copolymers including alkyl(meth)acrylic acid ester monomer having 2˜14 carbon atoms of alkyl group, characterized in that the gel fraction represented by the formula (1) is 45˜75%, the swelling ratio represented by the formula (2) is 5˜20, and the weight average molecular weight of sol eluted from the adhesive by ethyl acetate is at least 300,000. The acrylic pressure sensitive adhesive composition of the present invention has excellent balance of low rate peeling strength and high rate peeling strength, satisfactory wettability, and good polarizer surface protection and repeeling property.

An ethylene polymer having small values of Mw / Mn and Mz / Mw, a small proportion of long-chain branches, a high melt tension and a high swell ratio and a process for preparing the same by polymerizing ethylene in the presence of an ethylene polymerization catalyst comprising a solid titanium catalyst component containing titanium, magnesium, halogen and a compound having at least two ether linkages present through plural atoms with an organometallic compound catalyst component.

A substance detection sensor includes an insulating layer; two electrodes spaced in opposed relation to each other on the insulating layer; and conductive layers formed between the two electrodes on the insulating layer so as to electrically connect the two electrodes, and of which a swelling ratio varies depending on the type and / or amount of a specific gas. The conductive layers are formed by dividing into plural layers between the two electrodes.

The invention discloses biodegradable medicine hydrogel formed by in-situ cross linking. Gel forming time of the hydrogel is less than 20 seconds, swelling rate is 0-600%, rupture strength is not less than 50 mmHg, degradation starting time is 3-40 days, and degradation time is 7-180 days. Raw materials preparing the hydrogel include a first component containing nucleophilic functional groups and a second component containing electrophilic functional groups, and the first component and the second component are composited and physically mixed through a mixing tool and then covalently cross-linked to form the hydrogel. Physical performance and biodegradability of the hydrogel can be adjusted by changing a proportion of compositing ingredients of the first component or the second component, and the hydrogel is controllable in performance and simple to operate and can be used for organism environment at different positions.

The invention relates to an injectable temperature sensitive gel used for filling and repairing damaged tissues. The gel is characterized in that: medical-grade hyaluronic acid and chitosan are used as gel raw materials; the gel swelling ratio is 2-500; and a temperature sensitive temperature is 32-37 DEG C. The gel provided by the invention has the advantages that the injection temperature sensitive gel has physical and chemical properties of a general gel, also has injectable and temperature sensitive properties and a good fluidity at a room temperature and is easy for injection; the formability in organisms is good and the degradation is slow so that the general gel can not be compared; a cross-linking agent is not used for the gel so that harms of the cross-linking agent to a human body are avoided; a gel system can prolong a persistence time of the gel in a body, and also can continuously stimulate the body to produce reactions so that the tissue in-situ regeneration and repair is promoted and the filling quality is increased; and the gel simultaneously has the advantages of reducing bacterial invansion, anticoagulation and low allergic reaction and the like.

The present invention discloses a preparation method for a chitosan-based porous scaffold with biological activity. According to the present invention, chitosan and inorganic micro / nanoparticles with biological activities are adopted as raw materials to prepare into slurry; a water-soluble aldehyde polysaccharide polymer is adopted as a cross-linking agent; a Schiff base cross-linking process and a freeze drying method are adopted to prepare a class of chitosan-based composite porous scaffold materials with biological activities, wherein porosities, pore sizes, mechanical properties, degradation performances, and bone conductions / bone inductions and the like can be regulated through the formula and the process conditions. According to the present invention, the porous scaffold provided by the present invention does not adopt harmful chemical cross-linking agents, and can not cause adverse effects to cells; with the cross-linked porous structure and a plurality of hydrophilic groups such as amino, carboxyl, hydroxyl and the like, the porous scaffold has high chemical stability in an aqueous phase with a wide pH range (pH range of 5-9), and has outstanding advantages of softness, high elasticity, swelling ratio of 30 times, and the like; the porous scaffold has advantages of imitation of natural bone extracellular microenvironment in aspects of the porous structure, the chemical composition, the surface chemistry and the like.

An inkjet recording method recording on an inkjet recording medium having an ink receiving layer containing at least inorganic microparticles, a water-soluble resin and a crosslinking agent, by ejecting(1) an inkjet ink containing at least a dye, water and a water-soluble organic solvent, wherein 50% by weight or more of the water-soluble organic solvent is a solvent which gives a swelling ratio of 3% or less for the water-soluble resin crosslinked by the crosslinking agent, using(2) an image forming apparatus equipped with an ink circulating apparatus including:(i) a plurality of liquid droplet ejecting elements,(ii) a common flow channel, and(iii) a common circulation channel,wherein the inkjet ink is supplied from the common flow channel to the plurality of liquid droplet ejecting elements, and circulates to the common circulation channel. The inkjet recording method gives a sharp and high-density printing, and is excellent in ejection stability.

An electrolyte membrane (11) includes: a filler (20); and a polymer electrolyte (22). A thickness of the electrolyte membrane (11) is 1 micrometer to 500 micrometer, a moisture content thereof is 10 mass % or more, and a ratio of a swelling ratio in a membrane surface direction (xy) thereof and a swelling ratio in a membrane thickness direction (z) thereof satisfies following Expression 1: where Lambda z is the swelling ratio in the membrane thickness direction (z), and Lambda xy is the swelling ratio in the membrane surface direction (xy).λxyλz<0.3[Math.1]

The invention relates to a preparation method of a semi-interpenetrating network nanocomposite hydrogel which can respond to variations in temperature, pH and ultraviolet to realize volume transition. The preparation method of the gel is as follows: taking temperature-sensitive monomers, namely N-isopropylacrylamide and azo type water soluble monomers, namely 4-((4-acryloxy) phenyl azo) benzoic acid as copolymerization monomers, taking modified nano-clay as a cross-linking agent, dissolving the monomers and the cross-linking agent in a cellulose type macromolecular water solution, uniformly stirring, and then performing oxidation, reduction and catalytic free radical polymerization in an ice bath under the protection of nitrogen for preparation. The gel uses nano-laponite cross-linked monomers to constitute a framework of the gel and takes cellulose type macromolecules as semi-interpenetrating macromolecules. The obtained hydrogel has the advantages of excellent mechanical properties, high swelling rate and fast and controllable stimulus response. The gel has the potential to be applied to the field of sustained release of medicaments.

The invention provides a preparation method of a waterborne PVDF (Polyvinylidene Fluoride)-PVDF copolymer composite coating membrane. The method comprises the following steps: 1) preparation of PVDF-PVDF copolymer-ceramic mixed slurry: mixing and stirring deionized water, PVDF and a PVDF copolymer to obtain a uniform solution, adding a dispersing agent, mixing with mixed ceramic powder, uniformly stirring at the temperature of 30 to 50 DEG C, and performing ball milling for 0.5 to 2 hours to obtain the PVDF-PVDF copolymer-ceramic mixed slurry; (2) coating: coating one side or two sides of a base membrane with the PVDF-PVDF copolymer-ceramic mixed slurry prepared in the step 1) to form a waterborne coating, and drying in a three-stage drying oven at the temperature of 40 to 90 DEG C to obtain the waterborne PVDF-PVDF copolymer composite coating membrane. The preparation method has the beneficial effects that the swelling ratio of the membrane in electrolyte is increased, the electric conductivity of a lithium battery is increased, the internal resistance of the lithium battery is lowered, and the rate discharge performance and cycle performance of the lithium battery are improved.

Provided is cleaning solution used for cleaning ink containing water and resin, cleaning solution containing water and solvent. Solvent contains glycol ether compound represented by general formula 1. Ink film obtained by drying the ink has swelling ratio of 20 percent or higher but 150 percent or lower, where swelling ratio is calculated by mathematical formula 1 based on masses of ink film before / after immersed in cleaning solution at 25 degrees C. for 24 hours,R1(OR2)XOR3  General formula 1In general formula 1, R1 and R3 represent hydrogen atom or alkyl group including from 1 through 4 carbon atoms, R2 represents alkyl group including from 2 through 3 carbon atoms, and X represents integer of from 1 through 4,Swelling ratio (%)=100×[(B−A) / A]  Mathematical formula 1In mathematical formula 1, A represents mass of ink film before immersed, and B represents mass of ink film after immersed.

The embodiments herein disclose a method of fabricating composite scaffolds for skin tissue regeneration. The methacrylated hyaluronic acid (HAMA) and methacrylated gelatin (GelMA) are synthesized. The poly (glycerol sebacate)-poly(ε-caprolactone) (PGS-PCL) microfibrous scaffolds are synthesized. The hydrogel is synthesized. The composite scaffold comprising hydrogel and poly (glycerol sebacate)-poly(ε-caprolactone) (PGS-PCL) microfibrous scaffolds is fabricated. A plurality of physico-chemical characteristics of the composite scaffold comprising hydrogel and poly (glycerol sebacate)-poly(ε-caprolactone) (PGS-PCL) microfibrous scaffolds are analysed. The physico-chemical characteristics comprises mechanical properties, swelling ratio and enzymatic degradation and scanning electron microscope imaging. The fibroblast cells are encapsulated within the composite scaffold comprising hydrogel and poly (glycerol sebacate)-poly(ε-caprolactone) (PGS-PCL) microfibrous scaffolds and hydrogels. The fibroblast cells are seeded on composite scaffold and PGS-PCL scaffold. The fibroblast cell viability, fibroblast cell attachment, fibroblast cell spreading, fibroblast cell proliferation and fibroblast cell metabolism are analysed in composite scaffolds, PGS-PCL scaffolds and hydrogels.

The present invention relates to an acrylic pressure sensitive adhesive composition comprising (meth)acrylic copolymers including alkyl(meth)acrylic acid ester monomer having 2˜14 carbon atoms of alkyl group, characterized in that the gel fraction is 10˜55%, the swelling ratio is 30˜110, the weight average molecular weight of sol eluted from the final adhesive by ethyl acetate is at least 800,000, comprising low molecular weight molecule having the maximum 100,000 of weight average molecular weight by 10˜40 wt % of the total sol component; and the above composition show excellent durability under a high temperature and / or humidity condition, and can improve the light leakage phenomenon and provide excellent operability at the time of manufacturing polarizer by effectively providing high modulus and stress release property.

The invention discloses an injection gel containing submicron hyaluronic acid microspheres and a preparation method thereof. The diameter of each microsphere is 100 nanometers to 50 micrometers. Swelling ratio of the injection gel is 2-2000. The preparation method includes: dissolving biodegradable hyaluronic acid into organic solvent to obtain spinning solution; electrospinning the spinning solution using electrostatic spinning, and crosslinking through coagulating bath to obtain nano / submicron microspheres; dialyzing to purify the microspheres, preparing into injection with phosphate buffer or normal saline, and homogenizing with suspension of a stem cell growth factor system according to a certain volume ratio to obtain the injection gel. The injection gel containing submicron hyaluronic acid microspheres prepared by the method is fine in shaping performance, long in shape preservation, and fine in cell compatibility, and is applicable as therapeutic for ophthalmology and orthopedics, also applicable as tissue-engineered repair materials such as bone tissues, cartilage tissues, blood vessel tissues, heart tissues and nerve tissues or as filling material for plastic surgery.

A stretched PVA (polyvinyl alcohol) film and a preparation method for the same belong to the field of high polymer packaging materials, and aim to solve the problems of high energy consumption, low production efficiency, complicated process and special equipment production during processing with water serving as solvent in the prior art. The stretched PVA film is of a monolayer structure or three-layer structure, wherein the monolayer structure refers to B, and the three-layer structure sequentially refers to A / B / A or B / A / B. The method includes the steps of melting plasticization, extrusion granulation, and uniaxial stretching or biaxial stretching so that the stretched PVA film is obtained. The stretching melting range of the stretched PVA film is from 160 DEG C to 240 DEG C. The stretched PVA film meets national standard of biological degradability, and the degradation ratio is larger than or equal to 70%. The stretched PVA film is high in water resistance, and the swelling ratio of the stretched PVA film soaking in water at the temperature of 23 DEG C for 48 hours is smaller than or equal to 120%.

A method for producing a hollow foam molding having a thin and uniform wall thickness, including extruding a foamable melt containing a polypropylene resin having an equilibrium compliance Jeo of 0.5×10−3 to 1.8×10−3 Pa−1 and a swell ratio Sw of 2.5 or less and a physical blowing agent through a die to obtain a parison having a softened polypropylene resin foam layer, placing the parison in a mold, and blowing a gas into the parison to obtain a hollow foam molding having a hardened polypropylene resin foam layer with an apparent density of 0.35 to 0.65 g / cm3.

The invention discloses an organic / inorganic composite polymer diaphragm and a preparation method thereof. The diagram comprises a polymer matrix and hollow mesoporous silica microspheres dispersed in the polymer matrix. The preparation method comprises the following steps: dissolving a polymer in a solvent to prepare a polymer solution, adding the hollow mesoporous silica microspheres to the polymer solution and dispersing the solution through stirring to obtain a mixed solution; pouring the mixed solution on a flat base plate; and performing drying. According to the invention, hollow mesoporous silica is used as an additive to introduce void volume in the polymer matrix, thereby further improving solution absorption performance. The organic / inorganic composite polymer diaphragm has characteristics of good solution absorption and a low swelling ratio. The technical problem that a gel-type polymer diaphragm has a high swelling rate caused by high a solution absorption rate in a lithium-ion battery is solved, thereby further improving conductivity of lithium ions.

Described herein are polysaccharide gel formulations including at least one inhibitor of polysaccharide degradation and methods of making the same. The methods described herein involve the steps of providing at least one polysaccharide and incorporating at least one inhibitor of degradation into the polysaccharide. In some embodiments, the incorporating step comprises 1 ) mixing the at least one inhibitor with the at least one polysaccharide at a highly hydrated state thereby encapsulating the at least one inhibitor in a polysaccharide network, and 2) dehydrating the polysaccharide network thereby controlling release kinetics or final swell ratio. In another embodiment, the incorporating step comprises 1) encapsulating at least one inhibitor into a biocompatible or biodegradable vessel and 2) combining the polysaccharide and the vessel into a gel formulation. The polysaccharide gel formulations described herein can be used for a variety of cosmetic applications.

The invention relates to an intelligent gel three-dimensional scaffold material for cell culture, wherein the intelligent gel three-dimensional scaffold material is prepared by the following methods: placing a supramolecular gel factor into water solution of natural polysaccharide, heating the supramolecular gel factor until the supramolecular gel factor is totally dissolved to form mixing solution, also cooling to form gel; and drying the prepared gel until the moisture is totally evaporated and forming a transparent film. The intelligent gel disclosed by the invention concretely is the gel with high water content and high swelling ratio formed by self-assembled fiber of the supramolecular gel factor and natural polysaccharide fiber interpenetrating with each other, and has good biocompatibility and cellular affinity. The cell is facilitated to be adhered, spread and multiplied on the surface of a biological material. The intelligent gel is simple in preparation method, easy in industrial implementation, low in cost and convenient in transportation, and has no special requirements to synthesis equipment, and rigorous and complicated conditions for traditional preparation and purification of polymer gel are avoided.

The present invention provides a medical adhesive composition containing a copolymer obtained by copolymerization of a monomer mixture containing an acrylic acid alkyl ester having C4-C12 alkyl group, a (meth)acrylic acid, and a methacrylic acid alkyl ester having C1-C4 alkyl group, which mixture is free of a multifunctional monomer having two or more unsaturated double bonds in a molecule, wherein the copolymer has a gel-sol ratio of 35:65 to 55:45 and a weight average molecular weight of the sol portion of 300,000 to 500,000, or a copolymer obtained by copolymerization of the above-mentioned monomer mixture and having a gel fraction of 35 to 55% and a swelling ratio of a gel portion of 50 to 90 times. The medical adhesive of the present invention is superior in the balance between adhesiveness and cohesiveness and can be preferably used for various medical adhesive tapes or sheets.

The invention discloses a low-swelling biodegradable medical photopolymeric aquagel and a preparation method thereof. The preparation method comprises the following steps: (1) synthesizing a polyester-modified multi-arm polyethyleneglycol block copolymer; (2) preparing an acrylate-terminated polyester-modified multi-arm polyethyleneglycol polymer; and (3) carrying out polymerization under ultraviolet irradiation to generate the aquagel. The preparation method has the advantages of simple technique and accessible raw materials; and the polymerization can be initiated under the irradiation of ultraviolet light at normal temperature, so the method is pollution-free. The prepared aquagel has the advantages of favorable biocompatibility, higher rupture resistance and lower swelling ratio, and the degradation time can be adjusted by controlling the polyester content. The aquagel is more suitable for narrow parts of humans (organisms). The method has the advantages of simple steps and high practicality, and is convenient to operate.

The invention provides a preparation method of a cross-linking polypyrrolone-sulfonated polyimide segmented copolymer proton exchange membrane. The method includes the steps that 3,3'-diaminobenzidine and excess 1,4,5,8-naphthalene tetracarboxylic dianhydride react to obtain anhydride-naphthalene-capped prepolymer, then 1,4,5,8-naphthalene tetracarboxylic dianhydride and excess 2,2'-bis(4-sulfonic phenoxy)benzidine react to obtain amino-capped prepolymer, finally, the anhydride-naphthalene-capped prepolymer and the amino-capped prepolymer are copolymerized according to equal mole to obtain a high-molecular-weight polypyrrolone-sulfonated polyimide segmented copolymer, and after membrane formation and prone exchange, polyphosphoric acid is used for further cross-linking so that the cross-linking polypyrrolone-sulfonated polyimide segmented copolymer proton exchange membrane can be obtained. The prepared cross-linking polypyrrolone-sulfonated polyimide segmented copolymer proton exchange membrane has the advantages of being high in mechanical strength and conductivity, low in swelling ratio and good in free radical oxidization resistance.