114 results about "Grammage" patented technology

The present invention concerns a paper-based barrier multilayer packaging material structure (1) being formed as a unitary sheet and comprising from its outer surface to its inner surface, the following layers: —a polymer dispersion coating (9) having a thickness of 1 to 10 μm, —a paperboard (8) having a grammage of between 120 g / m2 and 500 g / m2, —a water-based or solvent-less adhesive (7) having a thickness of 1 to 10 μm, —a barrier metallized paper layer (MBPL) having substance weight between 30-120 g / m2, preferably 45 to 90 g / m2 and a Water Vapour Transmission Rate (WVTR) of 10 to 0.1 g / m2 / d, preferably a WVTR of 1.0 to 0.1 g / m2 / d measured at 38° C. and 90% RH, and an Oxygen Transmission Rate (OTR) comprised between 100 and 0.1 cc / m2 / d, measured at 23° C. and 50% RH, preferably an OTR comprised between 1.0 and 0.1 cc / m2 / d. —at least one layer of a polymer dispersion coating (2) having a thickness of 1 to 25 μm, preferably of 5 to 15 μm.

The invention relates to a method for adjusting the basis weight of a sliver (FB) in an integrated drafting unit (1) of a carding machine (K), having an input measuring roller pair (6a, 6b) located upstream of a main drafting zone of the drafting unit and having an output measuring roller pair (15a, 15b) located downstream of the main drafting zone, the basis weight of the sliver (FB) at the input measuring roller pair (15a, 15b) forms a given parameter and the draft multiple of the draft mechanism forms an operating parameter, a change in the basis weight of the sliver (FB) at the input measuring roller pair (6a, 6b) causes a change in the operating parameter in a control unit of the carding machine (K), and the change in the basis weight of the sliver (FB) at the input measuring roller pair (6a, 6b) causes a change in the operating parameter. The change amount of the operating parameter is stored in a controller of the carding machine (K) by means of a pattern or a curve, which is formed by at least two parameters. The invention also relates to a drafting mechanism for carrying out the method.

The present disclosure relates to a tissue paper product, such as toilet paper or household towel. The tissue paper product comprises two to four plies, including at least a first ply and a second ply. The two, three or four plies are optionally bonded using an adhesive, such as a lamination glue, or a mechanical bond, such as edge embossing, to form the tissue paper product. The first and second plies are the outermost plies of the tissue paper product. If the total number of plies of the tissue paper product is 2, the tissue paper product has a grammage in the range of 24-50 g / m 2 , if the total number of plies of the tissue paper product is 3, the grammage is in the range of 34-65 g / m 2 , and if the total number of plies of the tissue paper product is 4, the grammage is in the range of 55-95 g / m 2 . The first ply is made of conventional wet press (CWP) paper and embossed with a heated embossing roll. The second ply is a structured paper ply, such as a ply made of TAD, UCTAD, eTAD, Atmos or NTT.

The application discloses a kind of non-woven binding net and net roll, belong to the technical field of net weaving.The non-woven binding net of the application, a plurality of the warp yarn is arranged along the warp direction parallelly, and weft yarn is reciprocated and extends along the warp direction between warp yarns;Warp yarn includes sheet-like first branch yarn and second branch yarn, and weft yarn is stacked between first branch yarn and second branch yarn in sheet form, and the lower surface of first branch yarn and the upper surface of second branch yarn are fixed by hot pressing and compounding;The denier of first branch yarn and second branch yarn is 350-560 denier, and the formed binding net grammage is 4.5-7.0g / m 2 , the interval of adjacent warp yarn is 10-35mm, under a certain width, the tensile force that can be carried along the warp direction is not less than 270kg, which breaks through the existing warp knitting material limit;In addition, the binding net does not have the structure of warp yarn winding, which can significantly improve the strength, and through the compounding mode, the peeling of warp yarn and weft yarn is avoided, and the material is saved.

The application relates to the technical field of filter materials, and discloses a preparation method of a deformation-resistant high-dust-carrying-capacity filter bag material, which adopts melt spinning composite treatment to composite a skeleton layer, a non-woven fabric filter layer, an electrostatic layer and a non-woven fabric filter layer into the deformation-resistant high-dust-carrying-capacity filter bag material, the method does not use a coating and an adhesive, the skeleton layer is made of modified polypropylene made of modified graphite hollow spheres and polypropylene, the grammage of the prepared skeleton layer is 30-60 g / m 2 , the thickness is 0.4-0.6 mm, and the fiber wire diameter is 40-60 mu m; after the above skeleton layer is composited with the electrostatic layer and the non-woven fabric filter layer, the stiffness of the filter material can be obviously improved, the stiffness test of the deformation-resistant high-dust-carrying-capacity filter bag material can reach 72-83 percent, and the deformation resistance is obviously enhanced.

The invention discloses an oil-proof acrylic emulsion, which belongs to the technical field of acrylic emulsion, and the oil-proof acrylic emulsion is prepared from the following raw materials: water, styrene, butyl acrylate, acrylic acid long-chain ester, carboxyl functional monomer, hydroxyl functional monomer and crosslinking monomer. The butyl acrylate and styrene are compounded, so that the film-forming property of the oil-proof acrylic emulsion is improved, a compact coating is quickly formed after the oil-proof acrylic emulsion is coated on low-gram-weight paper, oil permeation is prevented, and the oil-proof property of the paper is enhanced; by utilizing the characteristic that the hydroxyl cross-linking monomer can react with the cross-linking monomer, the monomer polymer can further form a compact net-shaped structure, so that the oil-proof performance of the oil-proof coating is improved, and the problems of high-temperature after-tack and rolling adhesion are avoided. Besides, large-particle-size latex particles are synthesized by adopting a reactive emulsifier system, and are matched with acrylic acid long-chain ester, so that the permeation of emulsion colloidal particles is reduced, and an excellent protective coating is ensured to be formed on the surface of the paper.

The invention relates to a high-gram-weight reinforced thermoforming PET (polyethylene terephthalate) non-woven fabric and a production method, and belongs to the technical field of non-woven fabrics, the high-gram-weight reinforced thermoforming PET non-woven fabric comprises a three-layer composite structure of an upper layer, a middle layer and a lower layer, the upper layer and the lower layer are polyester bi-component spun-bonded composite air flow drafting nets, and the middle layer is polyester bi-component woven gridding cloth; the three-layer structure is made into the non-woven fabric with the gram weight of 1000-4000 g / m through cross lapping and multi-channel needling shaping. According to the high-gram-weight reinforced thermal forming PET non-woven fabric and the production method, through the unique sandwich composite structure design, the bi-component woven gridding cloth is introduced between the upper layer of bi-component spun-bonded fiber net and the lower layer of bi-component spun-bonded fiber net to serve as a reinforcing layer, and the synergistic reinforcing effect is formed; the longitudinal and transverse mechanical properties of the product are more uniform, and the tear strength and the tensile modulus are obviously improved; the tensile modulus of the product can reach 1000-4000 Mpa, the tearing strength can reach 230-1500 N, the tensile strength after thermoplastic forming is 30-120 N / mm, and various mechanical indexes are improved by 50% or above compared with traditional non-woven fabric.

The composite device comprises a front waistline part, a rear waistline part and a core layer, the rear waistline part is arranged at the tail end of the front waistline part, and the core layer is arranged between the front waistline part and the rear waistline part. Each of the front waistline part and the rear waistline part comprises a surface layer, a bottom layer and a staggered composite light elastic component arranged between the surface layer and the bottom layer, the staggered composite light elastic component can be compounded by two layers of materials, the interval between adjacent rubber bands is 2-2.45 mm, the three layers of materials are compounded by the rubber bands in a staggered manner, the interval between the adjacent rubber bands is 2-2.45 mm, and each non-woven fabric has the basis weight smaller than 6 g / m < 2 >. According to the non-woven fabric, the requirement for the precision of a spraying device during manufacturing is lowered, so that the spraying cost and difficulty in the manufacturing process are reduced, meanwhile, the gram weight of the non-woven fabric is small, the overall weight is reduced, after the non-woven fabric is manufactured into hygienic products, the overall weight can be reduced, and the use comfort level is enhanced.

The application relates to a composite film material, a urea-formaldehyde product and a preparation method thereof, and a toilet bowl. The composite film material comprises a modified film material, the modified film material comprises a reinforcing cloth and a PVB matrix coated on the surface of the reinforcing cloth and filled in the reinforcing cloth, the total thickness of the modified film material is 0.1mm-2mm, the modified film material is provided with a plurality of through holes arranged in the thickness direction, and the diameter of each through hole is 1mm-5mm; the grammage of the reinforcing cloth is 10g / m 2 ~120g / m 2 ; the material for preparing the PVB matrix comprises PVB 85-92 parts and a plasticizer 8-15 parts in mass fraction, the total mass fraction of the PVB and the plasticizer is 100 parts, and the viscosity of a 10% PVB ethanol solution at 20 DEG C is 30s-120s. The composite film material has high hardness and high impact resistance, is applied in the urea-formaldehyde product, and is favorable for improving the impact resistance of the urea-formaldehyde product.

The utility model discloses a warm paste structure which comprises a packaging bag and a warm paste unit packaged in the packaging bag, and the warm paste unit sequentially comprises a stiff breathable film layer, a heating layer, a low-gram-weight breathable film layer, an adhesive layer and a release paper layer from top to bottom. The warm paste structure has the advantages of being high in air permeability, good in heating effect, firm in contact with the skin and comfortable in contact when in use.

An aerosol generating article (10) includes an aerosol generating substrate (12) comprising nicotine and a first paper layer (50) disposed about the aerosol generating substrate. The first paper layer has a first thickness / grammage value. A second paper layer (20) is disposed about the first paper layer. The second paper layer has a second thickness / grammage value. The first thickness / grammage value is less than the second thickness / grammage value.

The utility model relates to a kind of composite membranes for vacuum bag compression molding, the composite membranes for vacuum bag compression molding include demoulding layer, first glue point adhesive layer, isolation layer, second glue point adhesive layer and air-permeable felt layer which are sequentially laminated;The grammage of the first glue point adhesive layer and the second glue point adhesive layer is independently 4~7g / m 2 ;In vacuum bag compression molding, the composite membranes for vacuum bag compression molding of the utility model can be laid once, save time, help to vacuum, improve the surface quality of product, have good flatness, easy demoulding.

The present invention relates to paper or paperboard comprising cellulose fibers, said paper or paperboard comprising at least one coating layer formed by extrusion coating of a PP (polypropylene) resin, characterized in that the PP resin comprises at least 50% by weight of a branched PP copolymer having a density in the range of 890-910 kg / m3 (as determined according to ISO 1183), a melting temperature in the range of 155-170° C. (as determined according to ISO 11357-3), and a melt flow rate (230° C. / 2.16 kg) in the range of 10-15 g / 10 min (as determined according to ISO 1133), and wherein the PP resin is applied to the paper or paperboard at a grammage of less than 30 g / m2.

The utility model belongs to the technical field of automation control, and discloses a product gram weight slurry feeding time control device which comprises a bottom plate, a weighing platform is arranged on the bottom plate, a slurry storage container is arranged on the weighing platform, a supporting frame is arranged on the outer side of the slurry storage container, a stirring assembly is installed on the supporting frame, and the stirring assembly is arranged on the bottom plate. The stirring assembly is connected with the slurry conveying assembly, the weighing table monitors the gram weight change of slurry in the slurry storage container in real time so as to accurately control the conveyed slurry amount, and the stirring assembly and the slurry conveying assembly are combined so as to reduce extra occupation of the internal space of the slurry storage container and achieve efficient and stable slurry conveying. And the flushing assembly is combined with the stirring assembly and the slurry conveying assembly, so that occupation of the internal space of the slurry storage container is further reduced, the effect of flushing the inner wall of the slurry storage container is achieved, and the situation that residual slurry affects the quality of the slurry stored next time is avoided.

The invention discloses a mechanical fastening belt and a manufacturing method thereof, and relates to the technical field of mechanical fastening belts. The hook surface is compounded and fixed on the surface of one side of one end in the length direction of the base film through thermal forming; the base film is a modified base film added with a composite foaming system, and the composite foaming system is formed by compounding a physical foaming agent and a chemical foaming agent; the physical foaming agent is hollow glass beads, and the chemical foaming agent is azodicarbonamide. A composite foaming system formed by compounding hollow glass beads and azodicarbonamide is adopted in the base film, and the hook surface is compounded and fixed on the surface of one side of one end of the length direction of the base film through thermal forming, so that the uniformity of an internal bubble structure of the base film is improved; the problems that a traditional mechanical fastening belt is too high in gram weight, high in material cost and poor in use flexibility due to a single foaming system of a base film, and the compounding firmness of a hook face and the base film is insufficient can be solved.

The invention relates to the technical field of textiles, and discloses a preparation process of a light-weight environment-friendly automotive trim non-woven fabric. According to the process, three layers of fiber components including regenerated polyester, bio-based polyester and natural fibers are prepared; a sandwich structure is constructed by adopting multi-guide-bar parallel net forming, online electrostatic spinning is performed on a bio-based microporous membrane between layers, and low-melting-point hot melt adhesive powder is applied; and after needling reinforcement and gradient hot air curing are conducted, far infrared preheating is combined with a cold pressing mold for hot punching forming. While the gram weight is reduced, the sound absorption coefficient is improved, and the sound absorption material has excellent flame retardance, self-cleaning performance and full-life-cycle closed-loop recycling capacity.

This application provides a flexible production line capable of producing multi-grammage PET filament composite materials, relating to the field of nonwoven fabric production equipment technology. The production line includes, in sequence, a raw material processing unit, a mixing unit, a screw melt extrusion unit, a filtration unit, a metering extrusion unit, a drawing and filament forming unit, a hot air preheating unit, and a path switching mechanism for switchable high-grammage and low-grammage paths. The high-grammage path includes a cross-laying unit, a needle-punching composite unit, a slicing unit, and a hot-pressing unit, while the low-grammage path includes a hot-rolling unit and a winding and slitting unit. The drawing and filament forming unit employs a three-section fiber drawing machine (upper, middle, and lower), with a 30°–45° deflected airflow introduced in the middle section. This application achieves flexible switching between high-grammage and low-grammage products through the path switching mechanism, enabling the production of PET filament composite materials ranging from 9 g / m² to 2600 g / m² on the same production line, suitable for applications such as automotive sound insulation materials and filter materials.

The invention relates to the technical field of protective materials, and discloses a composite non-woven fabric material for protective clothing and a preparation method thereof.The composite non-woven fabric material for the protective clothing comprises an inner layer and an outer layer, the inner layer comprises spun-bonded PP non-woven fabric, and the gram weight of the spun-bonded PP non-woven fabric is 35-50 g / m < 2 >; the outer layer comprises a PE breathable film, the thickness of the PE breathable film ranges from 0.03 mm to 0.05 mm, the PE breathable film is provided with a micropore structure, and the micropore diameter ranges from 0.01 micrometer to 10 micrometers; and the inner layer and the outer layer are combined through an online compounding process. The composite non-woven fabric material for the protective clothing has high protective property, high moisture permeability and good durability. Meanwhile, the invention provides a preparation method of the composite non-woven fabric material, and the method adopts an on-line composite process and aims to realize simplification of a production process, reduction of energy consumption, improvement of production efficiency and optimization of comprehensive performance of a product.

The invention discloses ultralow-gram-weight environment-friendly composite kraft paper and a preparation method thereof, and the preparation method comprises the following steps: (1) raw material preparation: in parts by weight, wood pulp accounts for 40%-45% of the raw materials, and kraft paper regenerated pulp accounts for 55%-60% of the raw materials; (2) slurry treatment: adding a chemical additive into the mixed slurry obtained in the step (1), and uniformly stirring to obtain slurry to be put on a net; (3) forming a net part: feeding the to-be-meshed pulp into the net part of a double-net paper machine; (4) squeezing: feeding the wet paper web formed by the net part into a squeezing part, and sequentially squeezing the wet paper web through a first squeezing roller, a second squeezing roller and a third squeezing roller; (5) drying; (6) surface sizing treatment; and (7) coiling and forming to obtain the environment-friendly composite kraft paper with ultralow gram weight. According to the technical scheme provided by the invention, the ratio of the ultra-low gram weight kraft paper pulp is greatly reduced, but the strength still meets the packaging scene use requirements of chemical fertilizers, cement and other industrial woven bags, so that the purposes of environmental protection, cost reduction and efficiency improvement are achieved.

The invention discloses a preparation method of cellulose spunlace non-woven fabric capable of being ultrasonically compounded. Through gradient distribution design of chopped fibers and conventional fibers in fiber mixing, carding entanglement is reduced, gram weight uniformity is improved, an efficient antibacterial system is formed by combining a core-shell structure of the antibacterial composite fibers and dual treatment of nano-silver and an ultraviolet-inorganic silver antibacterial agent, meanwhile, a gradient spunlace process and ultrasonic composite synergistic effect are achieved, and the antibacterial performance is improved. The non-woven fabric has antibacterial property, mechanical property and liquid barrier property; secondly, the adjusting assembly drives a moving plate through an air cylinder, the material tension is dynamically adjusted in cooperation with an inclined groove and a push-pull strip structure, welding defects are avoided, and the interlayer bonding quality is remarkably improved; and finally, the aligning assembly drives a rotating plate through a servo motor, material width self-adaptive positioning is achieved through linkage of a telescopic strip-shaped piece and a limiting groove, the conveying accuracy is ensured, mutual noninterference with the adjusting assembly is achieved, and the structural stability and production efficiency of the non-woven fabric are jointly improved.

The utility model discloses a mesh belt friction winding device which comprises a fixing frame, a cloth guide support is arranged at one end of the fixing frame, a rotating mesh belt is arranged in the fixing frame, the cloth guide support is used for placing a winding roller, and the mesh belt is attached to the winding roller. And the winding roller is driven to rotate through the friction force of the mesh belt to assist in winding of the melt-blown cloth, so that the use cost is reduced, and the use space is reduced. And meanwhile, through the friction winding mode, the defects that in the low-gram-weight material winding process through a traditional winding method, the low-gram-weight material is prone to stretching and deformation due to the light gram weight can be overcome.

This utility model belongs to the field of fiberglass jacking pipe manufacturing technology, and discloses a continuous winding molding fiberglass jacking pipe manufacturing device, including a yarn frame, a large yarn threading plate, a small yarn threading plate, a resin impregnation tank, and a driving component. The low-grammage yarn is pre-impregnated in the resin impregnation tank, which is equipped with a stranding component to strand the impregnated low-grammage yarn into bundles. Then, by arranging high-grammage yarn and the impregnated and stranded low-grammage yarn alternately along the length of the mandrel, it is ensured that each impregnated and stranded low-grammage yarn has adjacent high-grammage yarns on both sides. This effectively reduces the dry spot problem that may occur during the later resin impregnation process, ensures uniform resin penetration of each layup, further enhances interlayer bonding, optimizes the layup structure layout, and helps improve the molding quality and production efficiency of the pipe. The device has a simple structure and is easy to operate. It can adjust various parameters in real time according to production needs and changes in ambient temperature to ensure high efficiency and stability during the production process.

The utility model discloses a multifunctional quantity control seasoning bottle which comprises a storage bottle and a cushion cover, the upper side of the storage bottle is in contact with a transparent tank, the upper side of the transparent tank is in contact with a rotating sleeve, a discharging hole is formed in one side of the rotating sleeve, a rotating rod is fixedly connected into the transparent tank, the upper side and the lower side of the rotating rod are both in threaded connection with limiting blocks, and the limiting block located on the bottom side is in contact with a semicircular plate. According to the seasoning box, the different gram weight holes are filled with different grams of seasoning through inversion, a certain gram weight hole in the transparent tank corresponds to the discharging hole by rotating the protruding plate, the transparent tank is provided with the semicircular plate, the semicircular plate is fixedly connected with the storage bottle, gram weight holes are evenly formed in one side of the transparent tank, the gram weight holes are different in size, and the upper side and the lower side of the transparent tank are fixedly connected with the limiting rings. The spices with corresponding gram weight can be moved out by pulling the baffle, so that the discharging amount can be accurately controlled, the transparent tank can be detached and cleaned by detaching the limiting block, the spices are prevented from being clamped in the gaps between the transparent tank and the rotating sleeve and between the transparent tank and the storage bottle, the rotation hysteresis is reduced, and the functionality of the spices bottle is improved.

The application discloses a high-temperature edible oil filtering non-woven material and a preparation method thereof, and mainly uses PE / PBT bicomponent fibers, nylon particles and needle leaf wood pulp board and aramid pulp as main raw materials, and utilizes hot air bonding and wet papermaking technology to prepare a composite edible oil filtering material with a grammage of 70-150 gsm; the application adds PA6 particles into pulp fibers as an auxiliary thermal adhesive, so that hydrogen bond failure of the filtering material under high-temperature conditions can be avoided, pulp fibers can be prevented from being separated from a fiber web and causing secondary pollution to filtered edible oil, the PA6 particles are used to replace a chemical adhesive, so that the chemical adhesive can be prevented from being easily degraded and causing harmful components to be separated out under high-temperature conditions, and the purity and safety of edible oil are ensured; and the filtering material can withstand high temperature of greater than or equal to 200 DEG C and can maintain stable physical and chemical properties under a high-temperature edible oil filtering environment.

The invention discloses a food contact grade water-based VAE adhesive for PE coated kraft paper as well as a preparation method and application of the food contact grade water-based VAE adhesive, and belongs to the technical field of polymer adhesives. The water-based VAE adhesive is prepared from the following components in percentage by mass: 1%-50% of a DiverSol540 VAE emulsion, 30%-90% of a DiverSol613M VAE emulsion, 1%-35% of emulsified water-based rosin and 1%-10% of water. The water-based VAE adhesive disclosed by the invention can form high-strength combination with kraft paper fibers, simultaneously realizes excellent initial wetting and firm adhesion to high-gram-weight PE coated kraft paper, has good cohesion and heat resistance, can effectively prevent thermal creep in a high-temperature coating process or in subsequent use, and solves the problem of high-end food packaging.

A card clothing wire is disclosed, especially for a doffer or a worker of a carding machine, which provides a superior retention of fibers during a carding process and which can be universally used to produce nonwoven webs with an increased grammage or to produce nonwoven webs with a low grammage and an increased quality. In one form, the card clothing wire includes a tooth depth of less than 1.7 mm and an overhanging tip with an undercut.

The present application relates to the technical field of ground composite material, and provides a production process of UV-resistant ground composite material, which comprises, from top to bottom, an UV-resistant polyurethane coating layer, a wear-resistant layer, a glass fiber mesh cloth impregnated epoxy resin layer, a base layer and a polyester fiber cloth substrate; the UV-resistant polyurethane coating layer is 20-50 microns thick and is composed of UV-cured aliphatic polyurethane acrylate resin containing a composite photoinitiator; the wear-resistant layer is 30-80 microns thick and is composed of UV-cured modified polyurethane resin added with nano-aluminum oxide wear-resistant filler; the glass fiber mesh cloth impregnated epoxy resin layer is 0.1-0.3 mm thick and is formed by completely impregnating alkali-free glass fiber mesh cloth in modified epoxy resin glue solution and then curing; the base layer is formed by mixing bisphenol A type modified epoxy resin and inorganic filler and then curing, and is 1.0-3.0 mm thick; and the polyester fiber cloth substrate is a bearing layer and has a grammage of 100-200 g / m 2 After UV aging for 1000 h, the color difference ΔE is less than or equal to 1.7, the tensile strength retention rate is greater than or equal to 93%, and the outdoor service life can reach 10-12 years, which is 5-6 times that of traditional epoxy ground materials.

The application discloses a kind of high cold-resistant windproof textile fabric and preparation process thereof, belong to the technical field of textile fabric.The fabric is composed of base cloth layer, first hot melt adhesive point layer, windproof layer, second hot melt adhesive point layer and cold-resistant layer arranged in sequence, the base cloth layer adopts plain weave or twill weave structure, the windproof layer is provided with hydrophilic modified coating on both sides, the outer surface of the cold-resistant layer is provided with water-repellent finishing layer, and the two hot melt adhesive point layers are arranged in regular lattice pattern.The application defines the fiber ratio, weaving density, grammage and thickness aperture parameters of each functional layer, and specifies the temperature, power, pressure and speed process parameters of each process.The application optimizes the multi-layer composite structure and lattice glue point composite mode, matches the raw material ratio and process parameters, the process flow is regular and controllable, the product structure arrangement is reasonable, adapts to the fabric use demand of clothing and outdoor products in cold environment, and the preparation process is simple and easy to scale production.

The invention relates to a system and a method for solving a dotted white defect of a wind power blade leading edge UD area, the system is characterized in that demoulding cloth and a VAP film air exhaust bag without a porous film are sequentially laid on the UD inner surface of a core material, and the VAP film air exhaust bag is arranged above the demoulding cloth; continuous felts are laid below the first layer of the upper UD of the core material and below the first layer of the lower UD of the core material respectively, the two layers of continuous felts are staggered by 45-55 mm in the chord direction, and the gram weight is 300-600 g / m; the number of the independent vacuum pipelines is the same as that of the extraction openings of the VAP film extraction bag, and each extraction opening is connected with an independent vacuum pump through the corresponding independent vacuum pipeline. According to the method, the time for covering the extraction opening by the resin is delayed to be more than or equal to 15 minutes, the resin infiltration speed is balanced, the defect rate is reduced to be less than or equal to 2% from 35%, and the maintenance cost of a single blade is reduced by more than 80%. Through the design of the combined filling system, collaborative optimization of air exhaust power and resin flow is achieved, and the industrial value is remarkable.

The invention discloses an automatic fiber supplementing system and method for a non-woven fabric production line, and the system comprises a rack, a working platform arranged on the rack, a conveying belt located at the front end of the lower part of the working platform, and a hydraulic lifting platform arranged at the rear end of the lower part of the conveying belt, and is used for bearing a fiber compression block; a guide rail plate capable of moving back and forth is arranged on the working platform, a lifting plate capable of moving up and down is mounted on the guide rail plate, a plurality of nail plates with barbed teeth are arranged at the lower end of the lifting plate, and the barbed teeth are used for inserting fiber compression blocks and raking the fiber compression blocks to the conveying belt. According to the system, continuous and stable supply of fibers is achieved through mechanical layer-by-layer stripping, caking is effectively avoided, manual material supplementing is replaced, the uniformity and gram weight consistency of a fiber web are remarkably improved, and the intelligent material supplementing requirements of a non-woven fabric production line for small dosage and on-demand response are met.