17results about "Wax addition" patented technology

A low basis weight, low opacity paper is disclosed. The low opacity paper is made from a fiber web containing highly refined cellulose fibers. The fiber web is coated with a bio-based wax such as coconut-based wax, palm-based wax, or soy-based wax. The resulting product may have a relatively low basis weight and relatively low opacity. Therefore, the product may have excellent transparency or translucency characteristics.

A heat-sealable paper with low basis weight and low opacity is disclosed. The heat-sealable paper with low opacity is made from a fiber web containing highly refined cellulose fibers. The fiber web may be initially coated with a bio-based wax such as coconut-based wax. The fiber web may be coated with a coating composition that forms a heat-sealable coating on the outer surface of the coated paper. The product may have excellent transparency or translucency properties. The product also has excellent heat-sealability properties that make the product well-suited for producing packages.

The present application relates to the technical field of sleeve, and specifically discloses a sleeve for supporting the inner circle of a steel coil, which comprises a sleeve body, wherein the sleeve body is in a cylindrical structure, and an opening is arranged along the length direction of the sleeve body; and the preparation method of the sleeve body comprises the following steps: configuring an impregnation solution: firstly, dissolving copolymerization crosslinking agent and polyethylene glycol 400 in deionized water; then, adding nano microencapsulated sodium hypophosphite catalyst and free sodium hypophosphite, and stirring uniformly; finally, slowly adding paraffin microemulsion, continuing to stir until uniform and stable, and obtaining the impregnation solution after adjusting pH; sleeve impregnation, drying and solidification, and post-treatment, so that deep esterification crosslinking is realized, the physical hydrophobic layer of paraffin emulsion is matched, the ring stiffness retention rate is high after being immersed in water, the equilibrium moisture absorption rate is effectively reduced, and the risk of softening, delamination and even fragmentation of the paper sleeve due to moisture absorption is avoided.

This invention discloses a preparation process for paper boxes used for food preservation and the resulting food preservation paper box, belonging to the field of packaging product technology. This invention constructs a dynamic covalent bond gradient interface and forms a strong anchoring-weak cohesive gradient structure by regulating the binding energy between fibers and functional layers, achieving a low fiber damage rate after multiple paper box cycles. A functional adaptation layer is simultaneously applied at the outlet of the paper machine's drying section, utilizing the water layer adsorbed on the fiber surface to achieve synergistic anchoring of interpenetrating network physical entanglement and chemical grafting. The core paper is micro-injected using hot press rollers, with molten chitosan-PEG graft material encapsulating softened PLA particles at 130°C, rapidly forming a mechanical interlocking structure within 2 seconds. Multi-scale synergistic slow release is achieved through spatial separation of modular slow-release tablets and electrostatically flocked citric acid. When humidity is triggered, water acts as a proton conductor at the interface, avoiding pre-reaction. Diatomaceous earth channels adsorb some NaClO2, forming a secondary release reservoir and extending the peak release time.

The present application provides a reversible photochromic paper bowl and its preparation method and application, the reversible photochromic paper bowl includes paper bowl base material, isolation layer, photochromic layer and protective layer arranged in turn; the isolation layer includes a combination of polyvinyl alcohol and cationic guar gum; the photochromic layer includes a combination of a first aqueous polymer matrix and photochromic microcapsules; the protective layer includes a combination of a second aqueous polymer matrix and nanometer titanium dioxide. Through the design of the isolation layer, the photochromic layer, the protective layer and their joint action, the reversible photochromic paper bowl has light response color changing characteristics, and the response speed is fast, and the color changing performance is reversible. At the same time, the reversible photochromic paper bowl has uniform and stable color development and color change effect, excellent ultraviolet aging resistance, high modulus, strength and rigidity, excellent mechanical properties, acoustic properties, sensitivity and sound quality effect, and its preparation method is simple, which can meet the diversified performance requirements in various scenes.

This invention relates to molded articles made from pulp compositions possessing grease and water resistance properties. Food-safe compositions and articles thereof possessing grease and water resistance properties are provided, comprising petroleum wax-based aqueous emulsions, food-safe coating formulations, and alkyl ketene dimers (AKD), wherein the compositions exhibit grease and water resistance properties and are free of fluorinated compounds. Methods for manufacturing the compositions are provided, as well as methods for using the compositions to form pulp molded articles such as food-safe containers and other pulp-based food packaging and utensils.

There is provided a method for producing a molded fiber based article by forming the molded fiber based article from a first aqueous pulp suspension and a second aqueous suspension comprising refined fiber material. Additionally, is provided a molded fiber based article produced with said method.

Low opacity paper is disclosed. Low opacity paper is made from a fiber web containing unrefined cellulose fibers. The fiber web is coated with a bio-based wax such as coconut-based, palm-based, and soy-based wax. The resulting product may have relatively low opacity. Therefore, the product may have excellent transparency or translucency characteristics.

The application discloses a kind of packaging paper wet resistance performance regulation methods, belong to papermaking field.The present application is used to the composite sizing process and simultaneously applied to the front surface and back surface of raw paper, and the composite sizing process of front and back surface is independently controlled;The composite sizing process includes: using atomization spraying equipment to uniformly spray barrier agent to the surface of raw paper, to form dense continuous moisture barrier layer;And by micro-gravure roller coating sizing agent on the surface of moisture barrier layer, to form the structured hydrophobic grid layer of regular pattern structure.The application is coupled by moisture barrier layer and structured hydrophobic grid layer, so that the water vapor transmission rate of packaging paper is less than 3 g / (m 2 ·24h), water absorption cobb value is 20-35 g / m 2 , with excellent water resistance and moisture resistance and low cost advantage, suitable for cold chain logistics packaging field.

Provided is a composition comprising a hydrophobic compound (A) that comprises a hydrophobic compound (A1) and a hydrophobic compound (A2) which differs from the hydrophobic compound (A1), wherein the hydrophobic compound (A1) is a compound selected from the group consisting of modified amine, modified polycarboxylic acid, paraffin wax, and microcrystalline wax, and the hydrophobic compound (A2) is a liquid or solid oil that is not a compound selected from the group consisting of modified amine, modified polycarboxylic acid, paraffin wax, and microcrystalline wax. Thus, provided is a novel composition that makes it possible to impart liquid repellency to a base material.

The application relates to a preparation method and application of a polyvinyl alcohol / quaternized lignin / palm wax biodegradable emulsion coating for improving the waterproof and oil-proof performance of paper, and belongs to the field of composite materials. The application aims at solving the problems that the existing unmodified paper has poor water resistance and oil resistance, and the existing waterproof and oil-proof coating cannot be degraded and pollutes the environment. The method comprises the following steps: one, quaternary ammonium modification of lignin; two, preparation of a composite coating. Application, which is used for improving the waterproof and oil-proof performance of paper.

The present invention provides a novel composition containing a hydrophobic compound (A) including a hydrophobic compound (A1) and a hydrophobic compound (A2) different from the hydrophobic compound (A1), the Shore A hardness [peak] of the hydrophobic compound (A) being 10 or more and 100 or less less than the Shore A hardness [peak] of the hydrophobic compound (A1). With this composition, liquid repellency can be imparted to a substrate.

This application provides a reinforced fiber-based packaging material and its preparation method, relating to the field of biomass conversion materials technology. The key technical points are: the main body is a layered composite structure, comprising, from the inside out, a core layer, a reinforcing impregnation layer, and a functional surface layer. The reinforcing impregnation layer penetrates and solidifies within the core layer and at the interface between the core layer and the functional surface layer. The functional surface layer is composited on at least one surface of the core layer. The core layer is composed of 3-5 layers of bio-based long-fiber kraft paper, with the fiber orientation of adjacent layers of bio-based long-fiber kraft paper forming an angle of 75-105 degrees, and the fiber length being 3-5 mm. The reinforcing impregnation layer is formed by curing a composite polymer reinforcing agent. The reinforced fiber-based packaging material and its preparation method provided by this application have the advantages of being recyclable and degradable, and exhibiting excellent tensile strength, moisture resistance, flexibility, and surface abrasion resistance.

There is provided a method for producing a molded fiber based article by forming the molded fiber based article from a first aqueous pulp suspension and a second aqueous suspension comprising refined fiber material. Additionally, is provided a molded fiber based article produced with said method.

The present invention relates to a method and an apparatus (1) for dry manufacturing rigid cellulose product (2) having essentially non-flat general shape from a cellulose blank (10). The method comprises the steps of providing a cellulose pulp sheet (7), disintegrating the cellulose pulp sheet (7) in order to generate a quantity of separated cellulose fibres, forming a cellulose blank (10) in the cellulose blank forming unit (9), transferring the cellulose blank (10) to a product forming unit (11), and producing rigid cellulose products (2) in the product forming unit (11), wherein the product forming unit (11) comprises heating means for heating the cellulose blank (10) to a forming temperature T, the product forming unit (11) comprising a moulding tool having a first mould part (15) and a second mould part (16), wherein the heated cellulose blank (10) is pressed between the first mould part (15) and the second mould part (16) by applying a forming pressure P in the axial direction of the moulding tool. The primed cellulose pulp sheet (7) has an added barrier dispersion (34) that comprises deionized water (35), a barrier additive (36), including water, a barrier agent and a cationic stabilizer, and a wet strength additive (37), including water, and a wet strength agent, wherein the total amount of barrier agent, cationic stabilizer and wet strength agent is in the range 5-20 wt% of the barrier dispersion (34), the ratio between the wet strength agent and the barrier agent being in the range 1:2 – 2:1.