9021results about "Wrappers" patented technology

The present invention discloses a water-based emulsion of PHA, PBAT and PVOH and its application in paper-based barrier coatings. This emulsion is prepared by first melt-blending PHA and PBAT at 150-170 °C and then dispersing them into an aqueous PVOH solution at 80-95 °C. Plasticizers, cross-linking agents and surfactants can be added to improve the performance. After coating on paper and drying at 80-150 °C, a barrier film with a Cobb value of 10-15 g / m² and a Kit ≥ 10 grade is formed. Compared with traditional PE film laminating or fluorine-containing coatings, this system is more environmentally friendly and recyclable; PVOH dissolves in pulping water, PHA and PBAT are easily separated, and fibers can be efficiently recovered; in composting, soil and marine environments, PHA and PBAT have extensive biodegradability and are superior to PLA which is difficult to recycle and requires industrial composting. It is applicable to food, industrial, special packaging and agricultural paper products.

The invention discloses a polyhydroxyalkanoate water-based barrier coating composition and application, and belongs to the technical field of packaging materials. The composition takes water as a dispersion medium and comprises polyhydroxyalkanoate, a plasticizer, an emulsifier and an inorganic nano filler. The stable emulsion with the volume average particle size of 400-700nm is prepared under specific proportioning and process conditions. After the emulsion is applied to a paper substrate according to the dry film coating weight of 10-12 g / m, the obtained coating shows good comprehensive performance: the oxygen permeability is not higher than 580 cm / m.d, the water vapor permeability is not higher than 290 g / m.d, and the heat sealing strength at 130 DEG C is not lower than 5.0 N / 15 mm. The biodegradable paper-based packaging film does not contain fluorine compounds, can be completely biodegraded, and provides a technical path for sustainable paper-based packaging.

A repulpable insulated container assembly having a container formed of paper such as corrugated cardboard or varying paper materials and defining an interior; and a repulpable insert placed within the interior of the container and formed of a first paper layer; and a paper fiber pad coupled to the first paper layer.

A multi-sheet bag includes an inner sheet having a film side defining an interior surface of the multi-sheet bag; an outer sheet coupled to the inner sheet on a side opposite the film side; at least one void disposed between the inner sheet and the outer sheet defined by an adhesive pattern deposited between the inner sheet and the outer sheet.

A multi-ply bag includes an inner sheet assembly having a film side defining an interior surface of the multi-sheet bag, the inner sheet assembly having an another side opposite the film side; an outer sheet coupled to the opposite side; and at least one void disposed between the inner sheet and the outer sheet.

A repulpable container defines a cavity and a cavity opening at a top end of the repulpable container, both the cavity and the opening defined by a film layer, the film layer disposed on a first paper layer, the film layer configured to reduce heat transfer between the cavity and the first paper layer, the first paper layer arranged proximate to a second paper layer with at least one void therebetween.

An automatic dishwashing detergent water-soluble pouch includes a water-soluble film that forms at least two separate chambers that are enclosed by water-soluble film. The separate chambers are: a first chamber; and a second chamber. The first chamber is connected to the second chamber by a linking portion of water-soluble film, the length of the linking portion of water-soluble film between the first chamber and second chamber is at least 0.5 cm, and the first chamber and second chamber include detergent ingredients.

An automatic dishwashing detergent water-soluble pouch includes a water-soluble film that forms at least two separate chambers that are enclosed by water-soluble film. The separate chambers include a first chamber and a second chamber. The first chamber is connected to the second chamber by a linking portion of water-soluble film, and a length of the linking portion of water-soluble film between the first chamber and second chamber is at least 1.2 cm. The first and second chambers include detergent ingredients.

A blank includes an inner sheet having at least a base layer having a first side and a second side opposite the first side, the inner sheet including a film coupled to the first side of the base layer, and an outer sheet coupled to the second side of the base layer by an adhesive deposited between the outer sheet and the base layer such that a plurality of voids are formed between the outer sheet and the inner sheet, wherein the blank is configured to be folded into a multi-ply bag such that the film defines the inner cavity of the multi-ply bag.

The invention discloses a double-PHA barrier system for a paper-based container and a paperboard as well as a preparation method and application of the double-PHA barrier system, and belongs to the technical field of paper-based material surface engineering and green packaging. The system sequentially comprises a paper base material, a water-based PHA dispersion hole sealing layer and a PHA extrusion compact layer from inside to outside. According to the invention, the micron-sized PHA dispersoid without cell debris is utilized, so that an efficient hole sealing effect which is difficult to achieve by a high coating amount in a traditional process can be achieved by only needing an extremely low coating amount, and the pinhole defect of an extrusion layer is eliminated from the source. And in cooperation with the modified PHA extrusion layer with the specific crystallinity, the problem of micro-cracking of a single coating during edge rolling forming is cooperatively solved. According to the system, excellent barrier performance is achieved through a thinner bio-based structure, and meanwhile the system has a wide heat sealing window and excellent repulp recycling performance. Compared with the prior art, on the premise that high performance is guaranteed, the consumption amount of packaging materials and the environmental burden are remarkably reduced.

A package of one or more absorbent articles is provided. The package comprises a package material comprising natural fibers. The package comprises a plurality of panels comprising a consumer-facing panel. The package is sealed such that the one or more absorbent articles are enclosed therein. The package material exhibits a HuBa value of greater than about 5.3 hours, according to the HuBa Test. The package is recyclable. The package comprises a vertical side seal having a side seal strength. The side seal strength is greater than about 5.1 N / 15 mm and less than about 15 N / 15 mm, according to Seal Tensile Strength Test.

The invention relates to the technical field of film material preparation, and discloses a polylactic acid antibacterial packaging film and a preparation method thereof, the polylactic acid antibacterial packaging film comprises the following raw material components by weight: 60-80 parts of polylactic acid, 10-20 parts of polyvinyl alcohol, 10-20 parts of nano zinc oxide, 0.5-1.5 parts of nano cellulose, 1-3 parts of an antibacterial agent, and 10-15 parts of corn starch; the antibacterial agent is prepared from the following components in parts by weight: 5-10 parts of carboxymethylated chitosan and 0.5-2 parts of a dynamic disulfide bond cross-linking agent, the substitution degree of the carboxymethylated chitosan is greater than or equal to 80%, the antibacterial agent is prepared from tea tree essential oil and eugenol, and the dynamic disulfide bond cross-linking agent is bis (3-aminopropyl) disulfide. By adopting a composite system of carboxymethylated chitosan and a dynamic disulfide bond cross-linking agent, the technical effects of humidity-triggered self-repairing and mechanical property synergistic improvement are achieved, and compared with a packaging film with a single polymer base material in the prior art, the problem of antibacterial failure caused by mechanical damage is solved.

The invention discloses a high-barrier polycrystalline silicon packaging film and a preparation method thereof, and relates to the technical field of packaging materials. The high-barrier polycrystalline silicon packaging film consists of a polyester film carrier and functional slurry, the functional slurry is prepared from the following raw materials in parts by weight: 15 to 25 parts of ethylene-vinyl alcohol copolymer, 10 to 18 parts of polyvinylidene chloride, 5 to 10 parts of modified nano montmorillonite, 8 to 15 parts of modified polylactic acid, 3 to 6 parts of tributyl citrate, 1 to 3 parts of antioxidant 1010, 1 to 3 parts of ultraviolet light absorber UV-531, 0.5 to 1.5 parts of nucleating agent NA-11, 1 to 2 parts of silane coupling agent KH-550 and 3 to 7 parts of modified silicon dioxide aerogel; 2 to 5 parts of vinyl trimethoxy silane, 1 to 3 parts of nano silver and 20 to 30 parts of deionized water. The high-barrier polycrystalline silicon packaging film has excellent barrier performance, and can effectively block oxygen, water vapor and the like. The polycrystalline silicon packaging film is good in mechanical performance, not prone to damage, antibacterial, antioxidant and anti-ultraviolet, the quality guarantee period of polycrystalline silicon can be prolonged, the product quality can be guaranteed, and the polycrystalline silicon packaging film has great application value in the field of polycrystalline silicon packaging.

The invention discloses a large-size green packaging carton and a preparation process thereof, and relates to the field of packaging box preparation. The environment-friendly composite material comprises the following raw materials in parts by weight: 50-80 parts of plant fiber slurry, 10-25 parts of a modified starch-based adhesive, 5-15 parts of a nanoscale inorganic reinforcing filler, 1-5 parts of a degradable water repellent agent, 0.5-3 parts of a cross-linking agent and 2-8 parts of starch and plant fiber composite buffer microspheres. According to the preparation method, full-environment-friendly raw materials such as plant fiber slurry and a modified starch-based adhesive are selected and matched with starch and plant fiber composite buffer microspheres, and optimized processes such as segmented temperature control pressurization molding, adhesive gelatinization treatment, stirring speed reduction and microsphere structure protection are combined; and through coating of the degradable polymer coating and micron-sized hydrophobic texture imprinting, synergistic improvement of high compressive strength, excellent buffering performance, excellent hydrophobic and damp-proof effects and high degradation rate of the carton is achieved.

The invention relates to the technical field of high-barrier composite packaging films, and discloses a high-barrier composite packaging film with an antibacterial function, which sequentially comprises a base layer, a nano composite barrier layer, an antibacterial functional layer and an outer protective layer from bottom to top, and the layers are tightly attached through a coated starch-based adhesive. According to the high-barrier composite packaging film with the antibacterial function, the cellulose nanowhiskers have the characteristics of high strength and high modulus and are mixed with the bio-based polylactic acid, so that the tensile strength and tear resistance of the bio-based polylactic acid can be remarkably improved, and the structural stability of the packaging film in the using process is guaranteed; nano titanium dioxide and nano cellulose aerogel are arranged in the nano composite barrier layer, so that the barrier property of the packaging film on oxygen and ultraviolet rays can be enhanced, and the packaging film also has a certain antibacterial effect; in addition, the nanocellulose aerogel has a loose porous structure, so that gas molecules can be effectively prevented from passing through, and the barrier property is further improved.

The invention discloses a bio-based barrier coating for fresh-keeping of paper-based beverages as well as a preparation method and application of the bio-based barrier coating, and belongs to the technical field of paper-based packaging materials for foods and beverages. The coating is a water-based emulsion, and the core solid components of the coating comprise polyhydroxyalkanoate, polyethylene furandicarboxylate, aliphatic polyester, a polyisocyanate cross-linking agent, a nanofiller, a surfactant and a plasticizer. An emulsion is prepared through melt crosslinking and high-shear emulsification, and a dry film is formed through curtain coating and orientation. The film has excellent oxygen and water vapor barrier properties, can be heat-sealed and re-pulpified, and can be biodegraded in industrial compost, household compost and marine environments. According to the preferred embodiment, the bio-based content can be higher than 99%, aluminum foil can be replaced to be used for 60-day fresh-keeping beverage packaging, carbon footprint is reduced, and the recovery value is improved.

The invention discloses a multi-layer composite barrier film and a production process thereof, and belongs to the field of polymer composite materials. Aiming at the problems of obvious performance attenuation, poor interlayer binding force and low step-by-step compounding process efficiency of a barrier film in a humid and hot environment in the prior art, the invention provides a five-layer asymmetric structure design: an outer layer, a bonding layer, a barrier layer, a bonding layer and an inner layer. Wherein the barrier layer is formed by blending EVOH and MAH-PA6 and cooperating with nano montmorillonite to form a multi-barrier network, so that the oxygen permeability is smaller than or equal to 0.3 cm / (m.24h. 0.1 MPa), and the water vapor permeability is smaller than or equal to 1.5 g / (m.24h). The production process innovation comprises five-layer co-extrusion melt flow rate ratio control, three-roller gradient cooling and a bidirectional plasma processing technology, the continuous production speed is larger than or equal to 120 m / min, and the interlayer peeling strength is larger than or equal to 8 N / 15 mm. The barrier property stability is remarkably improved.

To provide a new application for recycled resin obtained from PET bottle caps.SOLUTION: The present disclosure relates to a multilayer molded container comprising at least: an inner layer containing a pigment 1 and a recycled resin obtained using PET bottle caps; and an outer layer containing a white pigment 2 and a resin 2.SELECTED DRAWING: None

The invention relates to a double-layer preservative film for prolonging the shelf life of frozen beef and mutton after unfreezing and a preparation method of the double-layer preservative film. According to the preparation method of the angelica dahurica extract-gliadin nano-particles, the angelica dahurica extract-gliadin nano-particles can be used for preparing a double-layer preservative film, and the preservative film is a natural component and is environmentally friendly and safe. The preservative film is of a double-layer structure, the mechanical performance is enhanced through the double-layer film structure, and meanwhile the preservative film has excellent oxygen and water vapor barrier performance and an antibacterial effect. According to the preservative film disclosed by the invention, slow release of active ingredients is realized by utilizing the Pycnogenin-gliadin nanoparticles, so that the antioxidant and antibacterial effects are remarkably improved, and the quality guarantee period of meat is prolonged. In addition, the preservative film does not need to be in direct contact with food in practical application, potential safety hazards of the food are further reduced, the operation process is simplified, pollution is avoided, a user can conveniently use the preservative film, the preservative film has the advantages of efficient preservation and environmental protection, and the preservative film has good application prospects and value.

Provided are a water-soluble film capable of maintaining good mechanical strength even when packaging a liquid detergent and the like while maintaining excellent water solubility of the water-soluble film and a package using the same. A water-soluble film of the present invention includes a polyvinyl alcohol resin. When a crystallinity index calculated for a first surface is Fd1 and a crystallinity index calculated for a second surface opposed to the first surface is Fd2 for FT-IR measurement of respective two surfaces of the water-soluble film by ATR technique using a diamond prism, the Fd1 and the Fd2 are 0.22≤Fd1≤0.72, 0.2≤Fd2≤0.65 and Fd1 / Fd2≥1.1.

The invention discloses a degradable PHA / PU composite water-based barrier coating and a coated paper product, and belongs to the field of biodegradable polymer coatings. The coating composition comprises a high proportion of polyhydroxyalkanoates as a barrier phase and a bio-based polyurethane as a toughening and heat sealing phase. The key innovation lies in that the cooperation of rigid barrier and flexible functions is realized by accurately regulating and controlling the ratio of two phases and adopting bio-based crosslinking, and the problem that the barrier property, the heat sealability and the flexibility of a traditional single material are difficult to consider at the same time is solved under the condition of low coating amount. The invention provides a full-life-cycle green packaging solution, aims to replace a polyethylene spraying film and a fluorine-containing coating, and has a remarkable application value in the field of food packaging.

The invention relates to a high-barrier antibacterial polylactic acid packaging material and a preparation method thereof, and belongs to the technical field of biodegradable packaging materials. The technical problems that a traditional polylactic acid material is insufficient in barrier property, poor in antibacterial performance and difficult to meet the packaging requirements of livestock and poultry meat, food and medicine are solved. A graphene oxide lamellar material is subjected to copper ion functionalization treatment and is bridged with tannic acid molecules through copper ions to form a nano filler, and then the filler is blended with a plasticized polylactic acid solution to prepare the membrane. The preparation method comprises the following steps: preparing a copper ion functionalized dispersion liquid from graphene oxide and copper nitrate, self-assembling the copper ion functionalized dispersion liquid and tannic acid under the condition that the pH is 8-10 to generate a nanofiller, uniformly dispersing the nanofiller, mixing the nanofiller with polylactic acid, polyethylene glycol and glycerol according to a specific mass ratio, coating to form a film, and controlling solvent volatilization conditions to obtain the high-performance packaging material. According to the method, the oxygen barrier property and the antibacterial activity of the material are remarkably improved through uniform dispersion of the nanofiller and reinforcement of a coordination network. The obtained material is suitable for packaging foods such as livestock and poultry meat.

The invention relates to the technical field of high-barrier environment-friendly packaging films, and discloses a high-barrier environment-friendly packaging film with an antibacterial function, the high-barrier environment-friendly packaging film comprises a base layer, a nano composite barrier layer, a bio-based functional layer and an outer protective layer from bottom to top in sequence, and the layers are tightly attached through a coated starch-based adhesive. According to the high-barrier environment-friendly packaging film with the antibacterial function, good biodegradability of polyhydroxyalkanoate adopted in the base layer film, polycaprolactone which is adopted in the nano-composite barrier layer film and has a biodegradable function and konjac glucomannan in the biological functional layer film are utilized; the composite packaging film can be decomposed into carbon dioxide and water by microorganisms in various environments, has excellent flexibility and processability, can adapt to different packaging requirements, provides basic flexibility, structural support and green and environment-friendly effects for the whole packaging film, and has a wide application prospect. The procyanidine arranged in the outer protective layer film provides stronger antibacterial property and water solubility for the whole packaging film.

The invention relates to the technical field of packaging materials, in particular to a high-strength corrugated carton based on polymer fiber material processing, and particularly relates to a corrugated carton achieving high strength and high waterproofness through polymer fiber material modification and special structural design. A polymer fiber material is soaked in a sodium hydroxide solution with a certain concentration, hydroxyl groups are introduced to the surface of the fiber, and the interface bonding force between the fiber and base materials such as starch is remarkably improved. According to detection, the bonding strength of the treated fibers and starch is improved by 30%-50%, so that the overall performance of the polymer fiber material layer is enhanced, in addition, compared with traditional corrugated waveforms, the UV composite waveforms are adopted, the compressive strength is improved by 20%-30%, the buffering performance is improved by 15%-20%, external impact force can be dispersed more effectively, and objects in the carton can be protected.

A package of one or more absorbent articles is provided. The package comprises a package material comprising natural fibers. The package comprises a plurality of panels comprising a consumer-facing panel. The package is sealed such that the one or more absorbent articles are enclosed therein. The package material exhibits a HuBa value of greater than about 5.3 hours, according to the HuBa Test. The package is recyclable. The package comprises a vertical side seal having a side seal strength. The side seal strength is greater than about 5.1 N / 15 mm and less than about 15 N / 15 mm, according to Seal Tensile Strength Test.

The invention relates to the technical field of medical supplies, and discloses an anti-puncture medical packaging film and a preparation method thereof. Comprising the following raw materials in parts by weight: an ethylene copolymer, modified aramid fibers, a reinforcing agent, an auxiliary agent, an antioxidant and an antistatic agent. The preparation method of the anti-puncture medical packaging film comprises the following steps: raw material blending, tape casting, film blank drying, stretching and shaping, and rolling. According to the technology, the modified aramid fibers are fully dispersed in the packaging film with the ethylene copolymer as the matrix, so that the puncture resistance of the packaging film is greatly improved, sharp objects are effectively prevented from penetrating through the packaging film, medical products are better protected, the damage risk of the products in the transportation and storage process is reduced, meanwhile, through modification, the service life of the packaging film is prolonged, and the service life of the packaging film is prolonged. The antibacterial performance is improved, and the medical material is more suitable for protection application of medical equipment.

The invention discloses a PHA-acrylic acid structural unit water-based dispersion based on interface engineering regulation and control, a preparation method thereof and application of a paper-based barrier coating, and belongs to the technical field of high polymer materials, interface engineering and water-based coatings. The stable interface layer is constructed in situ between the crystalline PHA and the acrylic resin through the amphiphilic polymer, so that the problems of poor compatibility and film forming defects of a bio-based material are effectively solved. The dispersion can realize excellent waterproof, oil-proof and gas barrier effects by only needing a relatively low coating weight, and the material consumption is remarkably reduced. The unique gradient structure of the coating has excellent mechanical adhesive force and efficient re-pulping and recycling characteristics, and the technical defect that a traditional barrier coating is difficult to recycle is overcome. And an ideal solution with high performance and high safety is provided for green packaging.

The invention relates to the technical field of research and development of BIB liquid packaging materials, and discloses a PE-PA-based composite film, a manufacturing process and an application in BIB liquid packaging, and specifically comprises the following steps: synthesizing a PE-PA compatilizer; the preparation method comprises the following steps: carrying out ring-opening reaction on an epoxy functional group of a PE-PA compatilizer and an amino functional group or a carboxyl functional group at a PA resin molecular chain end to prepare PE-PA compatilizer grafted nylon resin, and carrying out physical anchoring action on a long-chain alkane structure on the PE-PA compatilizer grafted nylon resin and a PE resin molecular chain to prepare the PE-PA alloy master batch; low-density polyethylene resin is used as a raw material of a supporting layer, PE-PA alloy master batch is used as a raw material of a functional layer, metallocene polyethylene resin is used as a raw material of a heat sealing layer, a three-layer co-extrusion blow molding film forming technology is adopted, the PE-PA composite film is prepared, and the film product is excellent in comprehensive performance and can be used for manufacturing a BIB bag body.

The invention discloses a multilayer co-extrusion heat-shrinkable film and a preparation method thereof, the film comprises an outer wear-resistant layer, a middle support layer and an inner functional layer, the thickness ratio of each layer is 1: 3: 1-1: 5: 1, the total thickness is 50-150 [mu] m, and the raw materials are prepared according to respective formulas. The preparation method comprises the steps of raw material preparation, melt mixing, die head extrusion, two-way stretching, water-cooling shaping, electronic crosslinking, aging treatment, heating softening and cold and hot shaping. The carbon nanotubes (CNT) and the h-BN nanosheets synergistically hinder crack propagation in the middle layer, so that the crack propagation resistance of the film is remarkably improved, the tensile strength, the thermal shrinkage rate and other properties are also optimized, compared with a traditional film, the comprehensive properties of wear resistance, high strength and high thermal shrinkage rate are achieved through interface collaborative design, meanwhile, the production cost is reduced by 20-30%, and the application prospect is wide. The method is suitable for food packaging, electronic device protection and other fields.

The invention discloses environment-friendly high-barrier packaging paper and a preparation method thereof, and belongs to the technical field of paper product manufacturing. The method comprises the following steps: dispersing bleached sulfate softwood pulp in an aqueous solution of TEMPO and NaBr, adding a NaClO solution, adjusting the pH value, carrying out a reaction, washing the product obtained by the reaction, and carrying out high-pressure homogenization to obtain TEMPO oxidized nanocellulose (TOCNF); mixing the bleached sulfate softwood chemical pulp, hardwood pulp and viscose fibers, pulping, papermaking and the like to obtain original paper; then, TOCNF and waterborne epoxy modified acrylic emulsion are mixed, and a mixed coating is prepared; and finally, coating the surface of original paper with the coating according to a certain mass ratio, and carrying out hot-pressing curing to obtain the environment-friendly high-barrier packaging paper. The packaging paper is excellent in mechanical property, high in barrier property, good in surface uniformity and printing property, environment-friendly and degradable in raw materials, simple to prepare and low in cost.