70 results about "Kraft paper" patented technology

The present disclosure provides a heat-sealable paper product for use in overwrapping, wherein the heat-sealable paper product: —comprises a paper substrate being a machine-glazed (MG) kraft paper having a glazed side and a non-glazed side, wherein the glazed side of the MG kraft paper is coated with a heat-sealable coating; —has thickness of equal to or below 85 μm according to ISO 534:2011; —has a tensile energy absorption (TEA) in cross direction (CD) of at least 60 J / m2 according to ISO 1924-3:2011; and—has a burst strength of at least 170 kPa according to ISO 2758:2014. The present disclosure also provides a method of producing a heat-sealable paper product for use in overwrapping as well as a method of overwrapping an item in a heat-sealable paper product.

The utility model discloses a kind of quantitative pulp distribution devices for kraft paper preparation, belong to kraft paper preparation field.The quantitative pulp distribution device for kraft paper preparation of the utility model, including stirring frame, the one side of stirring frame upper end is provided with converging pipe, the both sides of converging pipe outer upper end are all provided with temporary storage barrel.The utility model solves the problem that the intermittent pulp distribution device for existing production color paper needs to spend a lot of time to realize mixing by rotating vane rotation when quantitative pulp distribution, mixing efficiency is lower, influence kraft paper preparation efficiency, the utility model is gathered after the material of temporary storage barrel is discharged by transmission pipe, the inside of converging pipe in material gathering position is temporarily rotated by stirring piece, gather the material falling in different positions, and make material fall on the rotation track of stirring paddle, can directly improve stirring mixing efficiency.

The present invention is configured by integrally laminating a chemical nonwoven fabric and (corrugated) kraft paper on both sides of a polyurethane foam sheet. This allows for not only reinforcing rigidity by increasing elongation through the (corrugated) kraft paper, but also satisfying the eco-friendliness required for ESG management by enabling the recycling of the paper material. Furthermore, the use of (corrugated) kraft paper allows for easy molding of engine room sound-absorbing materials with complex shapes, thereby improving sound absorption performance in high-frequency ranges of 2,000 Hz or higher through improved moldability and rigidity. Additionally, by using a polyolefin-based binder to attach the polyurethane foam sheet and (corrugated) kraft paper, the present invention can improve moldability, rigidity, and sound absorption performance by increasing the adhesive strength of the (corrugated) kraft paper through a polyolefin-based binder that is similar to the molding temperature conditions of the polyurethane foam.

The application provides a coated white surface kraft paper with a back surface not easy to drop hair and powder and a preparation method thereof, and relates to the field of coated white surface kraft paper. The preparation method of the coated white surface kraft paper with a back surface not easy to drop hair and powder comprises the following steps: preparing a coating liquid, primary sizing and secondary coating. The coating liquid is prepared from the following raw materials: heavy pulp calcium, kaolin, starch, butadiene styrene latex, polyvinyl alcohol, sodium carboxymethyl cellulose, water-based epoxy silane, ethylene glycol diglycidyl ether and amino silicone oil. The preparation method can ensure that OCC waste paper boxes are effectively recycled for the back surface of the coated white surface kraft paper, and can overcome the problems of hair and powder dropping and adhesive residue on the back surface of the coated white surface kraft paper, so as to avoid the secondary transfer of hair, powder and adhesive on the back surface of the coated white surface kraft paper to the front surface of the paper, and to ensure the printing effect and printing efficiency of the coated white surface kraft paper.

The present invention provides a method for recovering white liquor and a white liquor separation accelerator that makes it possible to reduce the amount of white liquor contained in the lime mud after recovering the white liquor from the emulsion, thereby enabling the separation and recovery of more white liquor from the lime mud. [Solution] The method for recovering white liquor includes a white liquor treatment step of recovering white liquor by separating the lime sludge from the emulsion, which is a mixture of white liquor and lime sludge generated during the manufacture of kraft pulp, by filtration, and further includes a separation enhancement step of adding a white liquor separation enhancer, which contains at least a nonionic surfactant and promotes the separation of lime sludge and white liquor in the emulsion, to the emulsion before or during the white liquor treatment step.

The utility model discloses a kind of moisture-proof composite corrugated paperboard, it is related to corrugated paperboard field, specifically a kind of moisture-proof composite corrugated paperboard, including bottom layer moisture-proof layer, inner layer corrugated core layer, intermediate barrier layer, outer layer corrugated core layer and surface layer moisture-proof layer from inside to outside are sequentially arranged;The bottom layer moisture-proof layer is PET film kraft paper, the surface layer moisture-proof layer is PE film kraft paper, the intermediate barrier layer is aluminum foil composite paper, the inner layer corrugated core layer is melamine resin modified corrugated paper, the utility model solves the current corrugated paperboard surface using coating single waterproof coating or using single layer plastic film film coating, the moisture-proof effect of this single coating processing mode is limited, and easily failure due to abrasion;Although single layer film can block part liquid water, it is difficult to solve water vapor penetration problem, and interlayer is mostly starch adhesive, swelling peeling after meeting water, cannot satisfy the long-term use demand of high humidity environment problem.

The utility model discloses a kind of paper sleeves for preventing metal coiled material from collapsing, comprising: main body cylinder, by multiple layers high-strength kraft paper adhesion;Radial reinforcement structure, is set to one end of the main body cylinder End, and it is distributed along circumference direction;Axial stiffener, along the axial extension of the main body cylinder, and it is set to the wall of the main body cylinder;Waterproof barrier layer, is set to the outer surface of the main body cylinder;Buffer layer, is set to the inner wall of the main body cylinder, the utility model relates to paper sleeve technical field.The paper sleeve for preventing metal coiled material from collapsing, radial compression strength is greatly promoted, can effectively resist the weight and external impact of heavy coiled material, the waterproof barrier layer of outer surface makes paper sleeve have waterproof capacity, effectively prevent inner circle indentation, scratch and other surface defects, improve the finished product quality of coiled material, embedded reinforcing ring or annular protruding portion is integrated with main body cylinder, stress is uniform, there is no risk of loosening and falling off.

It can be stored upright in a cylindrical shape when in use, sealed tightly after use, and stored flat and stacked before use. [Solution] The device comprises a front sheet A and a back sheet B, a bottom sheet C positioned between the lower parts of the front and back sheets, and a resin chuck member 4. The front and back sheets are joined in three layers: an inner-side fused resin film LL, an intermediate aluminum vapor-deposited film AP, and a surface-side kraft paper K. The bottom sheet is joined in three layers, sandwiching an aluminum foil AF between two roughly rectangular fused resin films and resin films, forming a fold 5 in the center and folding it in half with the fused resin film on the outside. The lower and bottom edges of the left and right side edges of the front and back sheets are fused to the left and right side edges and bottom edges of the fused resin film of the folded bottom sheet, and the upper parts of the left and right side edges are fused to each other.

The invention relates to a method for operating an installation for producing kraft paper, said installation comprising a compacting device (21) for compacting a fibrous web, in particular a Clupak device, wherein - the compacting device (21) has a circulating cloth (26), a pressing bar (33), a wrap-around roller (34), a tensioning roller (32), a counter roller (28) and preferably a cloth drive roller (31), - the compacting device (21) can be operated in a compacting mode in which the circulating cloth (26) is pressed by the pressing bar (33) in the direction of the counter roller (28) and wraps around the counter roller (28) by a wrap-around angle (35), - in the compacting mode, a compacting gap (30) is formed between the cloth (26) and the counter roller (28), said compacting gap being designed such that the fibrous web is conveyed through the compacting gap at a production speed and is thereby compacted in the machine running direction (1), and - the compacting device (21) can be operated in an emergency running mode in which the pressing bar (33) is retracted in comparison to the compacting mode such that a distance is formed between the cloth (26) and the counter roller (28).

The utility model relates to paper processing equipment technical field discloses a kind of processing equipment for high-temperature-resistant waterproof wrapping paper production, including rack, and the side of rack is equipped with feed inlet, and feed inlet is used to high-temperature-resistant waterproof wrapping paper into the inboard of rack;Two support plates are fixed in the inner wall of rack, and two groups of rotating rollers are rotatably connected between rack and support plate, and rotating roller is used to flatten high-temperature-resistant waterproof wrapping paper;Rack top is equipped with heating assembly, and heating assembly is used to dry high-temperature-resistant waterproof wrapping paper;Heating assembly side is equipped with connecting assembly, air is heated by electric heating wire, and hot air is blown out using fan, and several air outlets on first air outlet pipe are evenly blown to the two sides of raw material, to ensure that drying process is uniform, can quickly and effectively dry treatment to high-temperature-resistant waterproof wrapping paper kraft paper raw material, remove moisture in paper, improve production efficiency.

This invention relates to the field of paper testing, and more particularly to a compressive strength testing device for kraft paper production. The device includes a testing platform with top frames fixed to both sides of its upper end. Support rods are fixed between the upper end of the testing platform and the top frames. A set of flattening rollers is rotatably mounted on the upper end of the top frames. Kraft paper passes through the gaps between the flattening rollers. A set of clamping plates is provided at both the upper and lower ends inside the top frames. The clamping plates are installed in clamping brackets at both ends, with the upper clamping bracket fixed to the top frame and the lower clamping bracket slidably mounted on the support rods at both ends. A pressure-applying component is provided on one side of the top frame, and a testing component is provided below the testing platform. This invention utilizes a single testing device to simultaneously perform tensile and compressive strength tests on kraft paper, achieving high testing accuracy and good testing results. Furthermore, it effectively prevents the clamping plates from loosening during testing, thereby greatly improving the clamping stability of the kraft paper and preventing it from loosening and detaching.

1. Name of the designed product: flowerpot (cattlehide paper pattern series). 2. Use of the designed product: for planting plants. 3. Design points of the designed product: in the combination of shape and pattern. 4. Picture or photo best indicating the design points: design 2 perspective view. 5. Design 2 is designated as the basic design.

The application discloses a manufacturing method for improving poor resin flow of a multilayer printed circuit board, and particularly relates to the field of printed circuit board manufacturing, and comprises the following steps: step S1, first, inner layer circuit manufacturing and brown processing are completed to obtain a core board to be laminated, the core board comprises a core board with a circuit pattern and a full copper / half copper light board core board; step S2, a lamination structure is configured according to the type of the core board, the type of the core board comprises kraft paper and special auxiliary materials, the special auxiliary materials comprise a partition plate copper foil and a release film; step S3, a large-area glue filling special program is adopted, and pressure, temperature and holding parameters are set; step S4, a laminated board is completed according to the configuration, a press is fixed, and lamination is completed according to the set program. The application precisely improves the resin flow state of a small-area copper-free area of the multilayer printed circuit board, completely solves the problem of poor resin flow, significantly improves product pass rate and interlayer bonding reliability, has strong process adaptability, is low in cost, does not need additional equipment modification, and is suitable for batch production requirements.

The invention relates to a method, system and a product thereof, wherein glassine or supercalendered kraft (SCK) paper, which has been used as a release liner substrate, is recycled into a high-quality pulp. When highly specific raw material is used for recycling, the characteristics of the recycled pulp may be adjusted already upon recycling. The method and the system is configured to adjust the fibrillation of the pulp such that the recycled pulp can be used without further refining for manufacturing new glassine or SCK paper. The compatibility of the recycled pulp may further be optimized for glassine or SCK paper production, respectively. Advantageously, the recyclable material is sorted based on the paper colour, prior to recycling. A recycled pulp may be provided which does not need to be bleached during the pulp recycling, prior to introducing it into a new glassine or SCK paper production.

The utility model provides a kind of recyclable carton, including lower carton body, upper carton body and elastic composite box, lower carton body, elastic composite box and upper carton body are combined connection from bottom to top, elastic composite box is combined by high tenacity kraft paper surface layer, grid thin silk layer and special wave shape elastic core paper layer, the design solves the original carton that can be recycled multiple times, cannot be adjusted in size according to different specifications of goods, idle waste is easily caused, and overall strength is general, practicality and universality need to be improved, the utility model uses adjustable carton structure, can be adjusted in height according to different specifications of goods, so that its practicality and universality are improved, in addition, each adjusting structure uses LFT-PP material, can improve the overall strength of carton, and good supporting effect is played to carton whole.

The present invention relates to the field of binding adhesive tapes, and more particularly, to a tensile degradable environment-friendly fiber-sandwiched kraft paper adhesive tape and a manufacturing process therefor. Wherein the kraft paper adhesive tape includes a kraft paper layer and an adhesive layer, and a reinforcing layer provided on the kraft paper layer. The kraft paper layer is formed by stacking at least two layers of kraft paper, and the reinforcing layer is provided between two adjacent layers of kraft paper of the kraft paper layer. The reinforcing layer includes several yarns, and the yarns are adhered in the kraft paper layer by a composite glue, so that a fiber-sandwiched structure composed of yarns is formed in the kraft paper layer, which can improve the structural stability, the tensile and tearing strength of the kraft paper adhesive tape. In addition, it is advantageous for environmental protection.

The application discloses a continuous honeycomb paper bag making equipment, which is sequentially provided with a feeding unit, a glue spraying unit, a middle section knife pressing unit, a V-shaped edge folding unit and a forming and cutting unit along a processing direction; the feeding unit conveys upper and lower kraft papers and an intermediate layer honeycomb paper; the lower kraft paper is positioned and sprayed with glue after deviation correction, color mark detection and marking; the intermediate layer honeycomb paper is adhered to the lower layer after being pulled apart; the upper kraft paper is adhered to the intermediate layer and the lower layer to form a semi-finished product after deviation correction and glue spraying; the semi-finished product is subjected to horizontal sealing and hot pressing edge folding, vertical sealing and bag separation, fold mark pressing and glue spraying by the middle section knife pressing unit; the semi-finished product is folded into a preliminary shape by the V-shaped edge folding unit; finally, the semi-finished product enters the forming and cutting unit, is detected by an electric eye, is punched and pressed to form a hanging opening, is sealed by at least five groups of short pressing knives on two vertical sides, is aligned, is pasted with a tearable sealing glue strip, is cut into a finished product according to the electric eye detection and is sent to a flow line; the equipment realizes continuous production from multi-layer paper feeding, glue spraying, forming to cutting, and the efficiency is improved.

The application discloses a kind of partition type archive data sealed preservation box, belong to the technical field of archives management. Including storage box, multiple movable ports are opened with linear equidistance structure in one side of storage box, and plastic frame is supported in one side of movable port, and zippered kraft paper bag of film covering is fixedly connected in plastic frame, and elastic sheet is fixedly connected between zippered kraft paper bag and storage box, and zippered kraft paper bag is externally provided with the rolling pressure piece that can extrude zippered kraft paper bag exhaust, and rolling pressure piece is fixedly connected in the inside of storage box. The application is by using storage box, plastic frame, zippered kraft paper bag, elastic sheet and rolling pressure piece multiple structure cooperation, so that zippered kraft paper bag can be pulled and extruded under the action of elastic sheet and rolling pressure piece, and the excess gas in zippered kraft paper bag can be extruded, so as to guarantee the security of internal archives file storage.

To provide a method for recovering white liquor and a white liquor separation accelerating agent that make it possible to reduce an amount of white liquor contained in lime mud after the white liquor is recovered from milky liquid, thereby allowing more white liquor to be separated from the lime mud and recovered. A method for recovering white liquor includes treating white liquor by separating lime mud by filtration from milky liquid generated during production of kraft pulp to recover the white liquor, the milky liquid being a mixed liquid of the white liquor and the lime mud; and further includes accelerating separation by adding a white liquor separation accelerating agent that includes at least a nonionic surfactant and that accelerates separation of the lime mud and the white liquor in the milky liquid to the milky liquid before or during the treating of the white liquor.

The present application relates to the technical field of green packaging materials, and particularly relates to an environment-degradable kraft paper lunch box, a composition and a preparation process, the environment-degradable kraft paper lunch box is prepared from food-grade unbleached kraft paper as a base material layer of the kraft paper lunch box, a dense anti-leakage inner layer of the kraft paper lunch box is formed on one side of the base material layer by PLA film coating, an environment-degradable composition coating composed of nanocellulose, modified starch and sodium bicarbonate is formed on the other side of the base material layer by in-situ foaming to form a microporous fluffy structure layer of the kraft paper lunch box, and an environment-degradable closed layer formed by low-temperature coating of water-based bio-based coating is arranged on the outer surface of the microporous fluffy structure layer; the present application constructs an efficient heat insulation structure with precisely matched thickness and performance requirements, and provides a kraft paper lunch box with excellent heat insulation performance, full environmental protection, degradability and a gradient structure that can be uniformly and controllably realized by a precise process, and an efficient preparation method thereof.

The invention relates to a method and an installation for producing kraft paper, said installation comprising the following installation parts: - a wire section (2) for forming a fibrous web by continuously applying a fibrous suspension along the machine running direction (1) by means of a headbox (3); - a shaking device (4) for shaking the fibrous web transversely to the machine running direction (1), i.e. in the transverse direction; - a pressing section (5) for pressing the fibrous web partially dewatered in the wire section (2); - a drying section (6) for drying the fibrous web; - a compacting device (21), in particular a Clupak device, for compacting the fibrous web in the machine running direction (1), - and a winding station (7) for winding up the paper web formed from the fibrous web, wherein a bypass assembly (46) is provided for conveying the fibrous web along a bypass path (47) so as to bypass the compacting device (21).

The utility model relates to foam composite carton technical field, and disclose a kind of recyclable aluminium foil foam composite carton, including base board, the side of base board is provided with protection mechanism;The protection mechanism includes corrugated board, the outer wall one side of base board is fixedly installed, and the outer wall other side of corrugated board is fixedly installed with kraft paper, the outer wall other side of base board is fixedly installed with aluminium foil layer, and the outer wall of aluminium foil layer is provided with printing layer, the side of corrugated board is fixedly installed with connecting portion.The utility model cooperates through corrugated board, kraft paper and aluminium foil layer, can improve the compression resistance of base board whole and play protection effect, simultaneously through connecting portion and filler layer let four base boards between flexible connection, when recycling and storing, folding can be carried out to avoid space waste, to avoid mutual knock and break when recycling, improve the integrity of recycling, and personalized printing can be carried out.

The utility model discloses a kraft paper slurry filtering device relates to all kinds of kraft paper technical field, including device body, the device body inner wall is rotationally arranged with the material discharge reel and the material receiving reel to be provided with the rotating mechanism of driving material discharge reel and material receiving reel rotation, the material discharge reel outside fixed winding has the filter screen, the filter screen movable end is fixedly connected with material receiving reel side wall, the device body upper portion and be located the just above filter screen center place is provided with the feed inlet, one side of device body is provided with the discharge gate and the liquid discharge, the discharge gate is located the above one side of filter screen, this kraft paper slurry filtering device, through setting material discharge reel and material receiving reel, so when filter screen is blocked or wears seriously, can through the release filter screen spare part and the winding filter screen need replacement part, thereby effectively improve the replacement efficiency of kraft paper slurry filtering device and its work efficiency.

The application relates to the field of paper cutting, in particular to a kraft paper wet adhesive tape cutting machine which comprises a rack, the rack is sequentially provided with a transmission device, a cutting device and a sensing device according to a paper roll cutting process flow, the rack is provided with a containing cavity for placing the paper roll, the transmission device is provided with a paper inlet and a paper outlet, the containing cavity is located at the paper inlet, the cutting device is arranged between the paper inlet and the paper outlet, and the sensing device comprises a first sensing part which is arranged at the paper inlet and emits rays, the rays are directed between the paper roll and the paper inlet and are used for detecting whether paper exists between the paper roll and the paper inlet; when the first sensing part does not detect the paper, the first sensing part triggers the driving transmission device to drive the paper to retreat. The structure can improve the convenience of replacing the paper roll, reduce the equipment maintenance cost, improve the equipment production efficiency and practicality, and avoid the phenomenon that the paper is easily jammed when the paper roll is almost used up.

The application discloses a kind of multilayer composite self-adhesive label for food packaging and preparation method thereof, it is related to label material technical field, including base paper layer, adhesive layer, surface paper layer, the base paper layer selects the kraft paper coated with silicon oil, the side of surface paper layer away from adhesive layer is coated with polyvinyl alcohol coating, and adhesive layer uses acrylate adhesive.The polyvinyl alcohol coating is arranged on the surface paper layer of self-adhesive label in the application, realizes high barrier property, solves the problem that traditional label only has identification function without protection ability, solves the problem that traditional label is easily eroded by environment, improves the adaptability of label in high humidity environment.