125results about How to "Improve interlayer strength" patented technology

A multilayer heat-sealable chlorine-free film of relatively low modulus, high interlaminar strength, and low noise upon flexing is provided. The film comprises an odor barrier layer of polyester resin and at least one heat-sealable skin layer, preferably two such skin layers on opposite sides of said odor barrier layer, composed of a homopolymer of ethylene or a copolymer of ethylene and an alpha-olefin or an ester-containing monomer. In a preferred embodiment, the odor barrier layer is formed of polyethylene terephthalate and adhesive tie layers are interposed between the odor barrier layer and the skin layers, resulting in a multilayer film of five layers. Pouches formed of such multilayer films are also disclosed.

There is provided a decorative material comprising at least a substrate, a low-luster pattern ink layer partially formed on the substrate, and a surface protective layer which is present on and contacted with the low-luster pattern ink layer so as to cover a whole surface including both a region where the low-luster pattern ink layer is formed and a region where no low-luster pattern ink layer is formed, wherein the surface protective layer is formed by crosslinking and curing an ionizing radiation-curable resin composition, and provided therein with a low-gloss region which is located in a portion just above the low-luster pattern ink layer and in the vicinity of the portion and visually recognized as a concave portion. The decorative material is provided on a surface thereof with a pattern, and exhibits a difference in gloss according to the pattern which is visually recognized as a concave portion, thereby imparting a good convexo-concave feeling to a surface thereof.

The invention discloses a multi-scale reinforcement body that carbon nano-tube is connected with carbon fiber and a preparation method aiming at solving the drawbacks of increasing rigidity at the interface, lowering toughness of material and not improving performance of resin base between the fibers and between carbon fiber plywoods after prior carbon fiber treatment is made. The multi-scale reinforcement body of carbon nano-tube connecting carbon fiber is made through combining between a carbon nano-tube decorated by 1, 6 hexamethylenediamine and carbon fiber with acyl chloride functional group on the surface. The preparation method comprises: the carbon nano-tube decorated by 1, 6 hexamethylenediamine and the carbon fiber with acyl chloride functional group on the surface are prepared before put into N,N-dimethylformamide for reaction, thereby getting the multi-scale reinforcement body of carbon nano-tube connecting carbon fiber. The invention has the advantages of big activity on the surface, a plurality of chemical activated functional groups, strong reactive activity, good cohesiveness with the base, improving shearing intensity at the interface for composite material by 127.5% to 144.7% and improving toughness for the base by 34.43% to 48.67%.

The invention discloses a heat preventing and insulating stealth compound material with broad-band wave absorption and a preparation method thereof. The compound material comprises a cold-faced panel,a first aerogel compound material heat-insulating layer, a first resistance high-temperature super-material layer, a second aerogel compound material heat-insulating layer, a second resistance high-temperature super-material layer, a third aerogel compound material heat-insulating layer and a hot-faced panel from inside to outside sequentially. In the aspect of heat preventing and insulating performance, compared with existing heat insulating tiles and cover plate type heat prevention systems, the integrated heat preventing and insulating stealth compound material has the advantages of good heat insulating performance, excellent mechanical performance, large component preparation availability, high reliability, easiness in maintenance and the like; and in the aspect of stealth performance, the technical scheme adopting the high temperature super-material has the advantages of strong designability and easiness in broad-band wave absorption implementation, weight gain is hardly generated in comparison with the technical scheme of a cold-faced by adopting a wave absorbing material, absorbent is not required to be added into a heat preventing and insulating material, the heat preventing and insulating performance is not influenced, and the material has good uniformity and strong controllability.

The invention discloses a heat-resistant wave-absorbing material, which is a composite material with quartz as matrix and a quartz fiber needled part as a reinforced phase. The composite material contains a short carbon fiber; the length of the short carbon fiber is 5-6mm; the volume content of the short carbon fiber in the composite material is 0.002-0.005g/cm<3>; the volume density of the quartz fiber needled part is 0.43-0.45g/cm<3>; and the preparation method disclosed by the invention comprises the following steps: selecting raw materials; preparing a fiber preformed part; dipping the fiber preformed part for a plurality of times; and carrying out gel and heat treatment until densification is finished. When the heat-resistant wave-absorbing material disclosed by the invention is 3.5mm in thickness, the reflectivity within a frequency range of 8-18GHz can be lower than -8dB; the heat-resistant wave-absorbing material has relatively good wave-absorbing property when the thickness is relatively small; and the preparation method disclosed by the invention is simple in processing step, free of a harmful and toxic pollutant in the technological process, and good in compatibility with the environment.

The invention discloses a high-thermal-conductivity laminated graphene composite material, and a preparation method thereof. The high-thermal-conductivity laminated graphene composite material comprises reduced graphene oxide, oxidized cellulose nanocrystalline, and epoxy resin; possesses a laminated structure which is mainly alternatively composed of reduced graphene oxide layers and oxidized cellulose nanocrystalline/epoxy resin layers; the oxidized cellulose nanocrystalline/epoxy resin layer is a mixture of oxidized cellulose nanocrystalline and the epoxy resin; the mass ratio of reduced graphene oxide to oxidized cellulose nanocrystalline is controlled to be 2:1-1:9; the mass ratio of reduced graphene oxide to epoxy resin is controlled to be 6:1-1:15. According to the preparation method, modification on the internal composition and the structure of the high-thermal-conductivity laminated graphene composite material, the whole process technology design and the steps of the preparation method is carried out, solvent volatilization self assembling is adopted to prepare the high-thermal-conductivity laminated graphene composite material, so that problems in the prior art such as small graphene composite size and poor thermal conductivity are solved, and the thermal conductivity of the high-thermal-conductivity laminated graphene composite material is capable of reaching 9 to 30W*m<-1>*K<-1>.

The invention discloses a production method for high-bulk packing board, which is characterized in that during preparing the pulp required by linings and cores, mechanical pulp is added into the waste paper pulp for preparing the linings and the cores during pulp mixing, and the binder formed by mixing starch and reinforcing agent is added to the mesh part of a paper machine during compounding the paper pulp layers, so as to compound the paperboard. The invention has the advantages that compared with the white cardboard processed through traditional method, the high-bulk packing board, (mainly the white cardboard) processed through the method has high bulk, (namely less quantitative property under the same thickness or high thickness under the same quantitative property), high interlayer strength, high printing applicability and excellent deflection, reduces the fiber consumption, reduces the consumption of the wood, and facilitates the protection of the environment and resources.

A decorating material which comprises a substrate, a low glossy designated layer provided on at least a part thereof, and a surface-protecting layer which is present on and contacts with the designated layer and covers over the whole surface including the region having the designated layer and that having no designated layer, wherein said surface-protecting layer is formed by crosslinking and curing an ionization-curable resin composition, and wherein, in said surface-protecting layer, a low lustrous region being visually recognized as a concave portion is formed in the portion directly on said low glossy designated layer and in the vicinity of the portion. The decorating material has a design being formed on the surface thereof and exhibiting a difference in gloss according to the design, which difference is visually recognized as a concave portion, to provide a concave-convex feeling to the surface.

The disclosure provides a multi-dimensional weaving shaping machine of composite materials, including: a guide template including a plurality of cylindrical guiders arranged according to the geometrical shape of a prefabricated member; an electrical control three-dimensional motion mechanism including: a control signal receiving terminal configured to receive motion control signals corresponding to the geometrical shape of the prefabricated member; and a three-dimensional motion output terminal configured to form a motion track according to the motion control signals; a weaving needle being connected with the three-dimensional motion output terminal and making weave fibers distribute among the cylindrical guiders according to the geometrical shape of the prefabricated member. The multi-dimensional weaving shaping machine of composite materials of the disclosure utilizes the cylindrical guiders and the electrical control three-dimensional motion mechanism to make the weaving needle to drive braided cords to distribute among the cylindrical guiders along the motion track to form the guide template. The disclosure is applicable to multi-dimensional weaving shaping of large-scale and complicated materials and capable of improving the interlaminar strength of composite materials. The shaping machine applies a rapid shaping technology to multi-dimensional weaving shaping of composite materials and the technical processes are automatic.

Disclosed is a shrink film which includes a core layer; two plies of intermediate layer respectively arranged on both sides of the core layer; and two plies of surface layer respectively arranged on both outer sides of the intermediate layers, and which has a five-layered multilayer structure composed of three types of layers [(surface layer)/(intermediate layer)/(core layer)/(intermediate layer)/(surface layer)]. The core layer is a resinous layer mainly containing a polyolefin resin, the surface layer is a resinous layer mainly containing a polyester resin, and the intermediate layer is a resinous layer mainly containing a polyethylene resin containing a glycidyl methacrylate (GMA) component. The shrink film has a low specific gravity, shows excellent shrink properties, has a high interlayer strength between film layers, and is tough, excellent shrink film. It is particularly useful as a shrink label for PET bottles.

The invention provides a high-temperature-resistant frequency selective surface antenna cover and a preparation method thereof, a layered structure is adopted, the antenna cover is composed of a bearing layer, at least one layer of FSS (frequency selective surface) structural layer and an anti-ablation/washing layer, the bearing layer and the anti-ablation/washing layer are a plurality of layers of 2D and/or 2.5D fabric reinforced silicon dioxide-based ceramic materials, and the FSS structural layer, the bearing layer and the anti-ablation/washing layer are integrally formed by adopting a gluedipping-gel technology. According to the antenna cover and the preparation method in the invention, a single-layer or multi-layer FSS structure is prepared inside the fiber-reinforced silicon dioxide-based ceramic material, the FSS structure is stable, the FSS structure is good in environmental adaptability under the protection of the fiber-reinforced silicon dioxide-based ceramic material, the application field is wider, and engineering application of the technology is facilitated.

A three part laminated material for use in making blister packages and a method of making such a material. The material is comprised of a central core layer of poly chloro-tri-fluoro ethylene to each side of which a separate polymer film is adhesively attached. The method of making the material involves use of a corona treater, a vertical forced air convection dryer, a horizontal convection dryer, a motor driven rewind, a chilled cylinder, a primary unwind and at least one laminating unwind. In the preferred embodiment, each of the polymer films is polyvinyl chloride, although a variety of different films may be used. The disclosed material provides a high moisture barrier, a stable inter-laminar structure and outer surfaces which lend themselves well to bonding with other materials.

A one-piece fiber reinforcement for a reinforced polymer is described. In an embodiment, a one-piece reinforcement is fabricated by first assembling an interior randomly oriented fiber layer between two exterior aligned fiber layers. With all layers in face to face contact, a preselected number of fibers from the aligned layer is conveyed out of its aligned layer and threaded into at least the random fiber layer so that the conveyed fibers engage and mechanically and frictionally interfere with the random fibers. The fibers may be conveyed from one aligned layer to the other for yet greater interference. The interfering fibers serve to secure and interlock the layers together, producing a one-piece reinforcement which, when impregnated with a polymer precursor, shaped and cured may be incorporated in a polymer reinforced composite article.

A pressing-on device for pressing fiber-reinforced thermoplastic materials onto a mold is described. The pressing-on device has a main body and a pressing-on layer provided on a surface of the main body. The pressing-on layer is implemented in this case using an inorganic material, preferably a ceramic material, and has a flexibility because of its structure which allows it to adapt itself to the contour of a mold. Increased heat resistance of the pressing-on device and improved properties of the processed fiber-reinforced thermoplastic material can be achieved.

The invention relates to the technology field of fiber winding and discloses a fiber winding fiber reinforced plastic pipeline structure and a sand inclusion layer manufacturing method and device. The fiber winding fiber reinforced plastic pipeline structure comprises an inside liner, a structural layer and an outer protection layer. The structural layer comprises an outer winding layer, a sand inclusion layer and an inner winding layer. The inner winding layer and the outer winding layer are formed by dipping glass fibers through resin glue in a composite mode. The sand inclusion layer is formed by winding pocket abrasive cloth and fiber yarn on quartz sand dipped with the resin glue. By means of a fiber winding fiber reinforced plastic pipeline provided by the invention, the adsorption force of the sand inclusion layer and the interlayer binding force and the interlayer strength of the wall of the pipe are improved, and the flexibility, the tensile strength and the rigidity are improved.

The invention provides amorphous polyaryletherketone/sulfone powder for laser sintering and a preparation method of the amorphous polyaryletherketone/sulfone powder, and belongs to the technical fieldof additive manufacturing. The method comprises the following steps: dissolving amorphous PEKN/sulfone resin coarse powder in a solvent, blending with water, a stabilizer and an emulsifier in a reaction container, and stirring at a high speed at 40-50 DEG C to form an emulsion; heating to 90-95 DEG C in a gradient manner, and evaporating to remove the solvent; and cooling to room temperature, filtering, washing with water and drying to obtain the amorphous polyaryletherketone/sulfone powder for laser sintering. The amorphous polyaryletherketone/sulfone laser sintering powder material which ishigh in sphericity degree, uniform and controllable in particle size and good in fluidity is prepared through a solvent emulsification method.

The invention relates to a coating type multilayer composite high-barrier film, a preparation method and application thereof, wherein the coating type multilayer composite high-barrier film is formedby compounding multilayer polymers through a coating composite molding method; the structural expression is A/(adh/C)n/B/(adh/C)n/adh/A; in the formula, n is an integer greater than 0, the A represents a surface layer, the B represents a barrier layer, the adh represents an adhesive layer, and the C represents an additional layer. The barrier layer B is a PVA-EVOH composition which is prepared from the following raw materials in parts by weight: 40 to 80 parts of PVA, 15 to 30 parts of EVOH, 5 to 30 parts of plasticizer, 0.5 to 10 parts of heat stabilizer and 0.1 to 2 parts of metal salt; andthe surface layers A and C are thermoplastic high-molecular polymers. The film disclosed by the invention has excellent strength and oxygen-blocking and water-blocking properties, and can be applied to the field of packaging of various foods, medicines and the like.