661results about "Coatings without pigments" patented technology

Toilet tissue having a dynamic surface comprising a surface material that overlays a textured web material such that the toilet tissue exhibits one or more novel properties and method for making same are provided.

The invention belongs to the field of paper products, and particularly relates to a heat-sealing coating composition for paper products and application of the heat-sealing coating composition, the coating composition comprises a component A, a component B, a component C and a component D, the component A is one or two of a biomass material with a dendritic or network structure or a cationized biomass material with a dendritic or network structure; the component B is selected from one, two or more of polyhydroxyalkanoate, alkyl ketene dimer, polyglycolide, polylactide, copolymer of butylene adipate and butylene terephthalate, cellulose ester and cellulose ether; and the component C is selected from one, two or more of thermoplastic cellulose and derivatives thereof, thermoplastic starch, rosin, cardanol-based epoxy resin, epoxidized soybean oil, epoxidized castor oil, tannic acid and malic acid. The coating composition is simple in preparation process and easy to industrialize, a target mixture can be obtained through physical blending, and the coating composition is low in production cost, energy-saving and environment-friendly.

Toilet tissue having a dynamic surface and method for making same are provided.

The invention provides a preparation method of modified nanocellulose, a biomass coating and a composite paper wood, the preparation method of modified nanocellulose comprises the following steps: a, oxalic acid is heated to a molten state, bleached wood pulp is added to the molten oxalic acid for a reaction, and nanocellulose is obtained; b, dispersing nanocellulose in water, and mixing with coniferyl alcohol solution, hydrogen peroxide solution and first enzyme solution for reaction to obtain DHP-nanocellulose; c, mixing the DHP-nanocellulose with coniferyl alcohol glucoside, a second enzyme solution and a hydrogen peroxide solution, and reacting to obtain the modified nanocellulose. According to the invention, a plant lignification process is simulated, so that crosslinking in lignin-glycan complex forms such as anisole bonds, ester bonds and the like and connection of covalent bonds such as Beta-aryl ether bonds among lignin are regenerated among separated fibers, and the modified nanofiber with high physical strength is obtained; and some environmental pollution problems caused by the use of raw materials and products in a traditional reinforcing method are solved.

The present invention relates to a barrier paper comprising a paper substrate and a carboxymethyl cellulose coating layer formed on a surface of the paper substrate, in which the paper substrate is cellulose paper, and the carboxymethyl cellulose coating layer comprises 80 wt% to 100 wt% of carboxymethyl cellulose based on dry weight.

The present invention relates to compositions and methods for forming substantially bio-based barrier coatings suitable for application on paper and paperboard substrates, as well as paper and paperboard substrates to which one or more such substantially bio-based barrier coatings are applied. The bio-based barrier coatings of the present invention comprise a bio-wax emulsion comprising one or more bio-waxes, such as castor oil wax, formed by hydrogenation of a bio-based oil, such as castor oil. The barrier coating composition is formed by dispersing a bio-wax emulsion into a polyhydroxyalkanoate (PHA) dispersion and can be applied as a coating at ambient temperature, for example, to paper or paperboard, such as paper or paperboard consisting of regenerated fibers, using conventional industrial processes.

An aqueous dispersion including a binder resin, a nonionic surfactant, and a wax component, wherein the content of the nonionic surfactant is 0.1 to 200 parts by mass based on 100 parts by mass of the binder resin, and 2 parts by mass or more based on 100 parts by mass of the wax component.

The present disclosure relates to a method to reduce or remedy problems associated with pinholes in coatings, particularly in coatings for paper or paperboard based on carboxymethylcellulose. The present invention provides improved barrier properties, particularly oxygen barrier properties. The disclosure further relates to paper or paperboard coated with such coating compositions. The coated paper or paperboard according to the present invention may also be provided with additional coatings and / or be metallized.

The paper sheet material includes a paper substrate having a uniform coating layer on at least one face thereof, the coating layer having a composition with silica and / or a silicone product to impart to the paper material a plastic-like tactile effect and in addition a polymeric component and a mineral component, wherein the polymeric component includes a polyurethane-based polymeric material and a styrene acrylic-based polymeric material, and the mineral component includes kaolin and precipitated calcium carbonate.

The invention relates to a method for applying starch to a paper or paperboard web, the method comprising the steps of: providing an aqueous suspension comprising starch particles and at least 1 wt %, based on the dry solid content of the suspension, of an amphiphilic polymer, creating a foam of the aqueous suspension, and applying the foam to the paper or paperboard web. The invention further relates to a paper or paper board product obtained by the method.

In order to solve the problems that an existing acrylic polymer barrier coating for a paper-based material is insufficient in mechanical strength and prone to breeding bacteria, the invention provides a barrier coating composition for the paper-based material, a barrier coating and a paper base material. The barrier coating composition for the paper-based material comprises the following components: a water-based acrylic prepolymer, chitosan grafted polyvinyl alcohol, an inorganic filler, microcrystalline cellulose, water-based polyurethane, a polysiloxane grafted acrylic monomer, an epoxy group-containing acrylic monomer, 1, 4-butanediol diacrylate and a solvent. The barrier coating composition for the paper-based material provided by the invention has excellent water vapor barrier property and grease barrier property, and more importantly, the barrier coating composition for the paper-based material provided by the invention has relatively good antibacterial property on the premise of having excellent mechanical property, so that the barrier coating composition for the paper-based material provided by the invention can be used as a barrier coating for the paper-based material. The method is suitable for various food paper-based packaging products such as disposable paper cups, paper bowls and food boxes, and the food safety performance of the food paper-based packaging products is improved.

A biodegradable composition is disclosed. The biodegradable composition includes (i) a biodegradable polymer and (ii) a cellulose ester. Films that include or are formed from the biodegradable composition, as well as articles that include a substrate and a layer of the biodegradable composition on a surface thereof, are also described.

The present invention relates to a method for manufacturing a barrier layer for a paper or paperboard based packaging laminate. said method comprising: a) providing a barrier substrate comprising at least 50 wt % highly refined cellulose pulp (HRC) based on dry weight of the barrier substrate. said HRC having a Schopper-Riegler (SR) number above 80 as determined by standard ISO 5267-1, b) providing a transfer coating substrate comprising a vacuum coating layer and a backing layer separated by a release layer, and c) transferring the vacuum coating layer from the backing layer to the barrier substrate by a transfer coating process using an adhesive layer applied on the barrier substrate and / or the vacuum coating layer to obtain a barrier layer for a paper or paperboard based packaging laminate.

The present invention comprises a method, process, and composition that enhances the performance of paper straws through the use of zein treatments which significantly enhance the wet strength of paper straws. Selection of the paper substrate found that Hanji paper displays remarkable durability, reinforcing performance of the straws even when exposed to water and high salinity. Furthermore, the present invention exhibits substantial effectiveness in curbing starch migration from the paper straws, creating a protective barrier against starch-based glues that might otherwise compromise beverage flavor and pose gluten-related concerns. Additionally, the present invention outlines a method for crafting spirally-wound straws using a biodegradable paper strip impregnated with the zein treatment. The straws of the present invention offer an adhesive-free, sustainable, and environmentally-friendly solution for making durable straws.

A barrier film (1) for a paper or paperboard-based packaging material, said barrier film comprising a, MFC layer, (2) with a grammage in the range 20-100 g / m2, and a density higher than 650 kg / m3. The barrier film further comprises a PHA, dispersion coated, primer layer (3, 9) coated on at least one side of the MFC layer, wherein the primer layer has a coating weight 0.5-12 g / m2; the primer layer (3, 9) comprises a PHA type selected from the group consisting of PHB, PHBV, PHBH, P(3HB4HB), other co-polymers of PHB, other homopolymers such as PHO, PHH, P3HP, and combinations thereof; and a thin vacuum deposited layer (4) coated on a first primer layer (3) which vacuum deposited layer has a thickness of 20-500 nm, the vacuum deposited layer comprises material selected from the group consisting of aluminum, magnesium, silicon, copper, aluminum oxides, magnesium oxides, silicon oxides and combinations thereof, preferably aluminum oxides.

The invention belongs to the technical field of preparation of composite membranes, and discloses a preparation method of a multipurpose nano-material composite membrane, which comprises the following steps: firstly, carrying out preliminary grafting modification on cellulose nanofibers by using a benzophenone derivative to improve the dispersity, and then introducing a preset functional group to carry out deep modification to obtain a modified cellulose nanofiber composite membrane; the mass ratio of the cellulose nanofiber to the benzophenone derivative is (1: 0.05)-(1: 0.2); according to the invention, the dispersity of the nano material and the grafting efficiency of the functional group are effectively improved by finely regulating and controlling the modification process of the nano material, so that the composite film further enhances the multiple functional characteristics of antibacterial property, antifouling property, ultraviolet shielding property and the like on the basis of keeping the original excellent properties; and meanwhile, the construction of the functional gradient ensures that the composite film can exert the optimal performance in different application scenes, interface defects are not easily generated among the functional layers, and the overall performance is not influenced.

In a release paper consisting of a backing paper layer coated on at least one side with PVOH and a silicone coating on at least one side, in which the backing paper layer coated on at least one side with PVOH consists of bleached kraft paper, containing at least up to 30 wt. % softwood and hardwood with a total freeness between 30 °SR and 42 °SR, preferably between 33 °SR and 38 °SR, and processing aids, and also a release layer which is applied at least on one side to the PVOH-coated side of the backing paper layer and consists of 0.5 to 5 g / m2 of a silicone, and wherein the release paper coated at least on one side with PVOH and silicone has a density between 850 and 990 kg / m3, preferably between 900 and 970 kg / m3, and a method for producing a release paper.

The invention provides branched vinyl silicone oil and a preparation method and application thereof.The branched vinyl silicone oil is obtained by taking a branched siloxane small molecule as a skeleton structure and then conducting chain extension reaction with a siloxane ring body, and the structure of the branched siloxane small molecule is shown as the following formula I: (CH3 (CH2) b (R22SiO) a (CH2) 2R22SiO1 / 2) n (R1R22SiO1 / 2) 4-nSiO2 (I), wherein R1 is vinyl, R2 is methyl, a is an integer ranging from 5 to 60, n is an integer smaller than or equal to 2, and b is 9, 11, 13, 15 or 17. The branched chain vinyl silicone oil provided by the invention is suitable for preparing a release agent and a release agent, can generate a better release effect, and has the advantages of low release force, silky hand feeling and the like.

The invention provides a flexible temperature sensor based on aerosol jet printing and a preparation method and application thereof, and belongs to the technical field of novel materials. The preparation method of the flexible temperature sensor comprises the following steps: (1) mixing polyimide with N, N-dimethylformamide to obtain a PI solution; coating paper with the PI solution, and drying to obtain a PI / paper-based composite material substrate; (2) preparing graphene and deionized water into a solution, and adding a dispersing agent to obtain conductive printing ink; and (3) taking the PI / paper-based composite material as a substrate, printing conductive printing ink on the PI / paper-based composite material substrate through aerosol jet printing, and drying to obtain the flexible temperature sensor. The flexible temperature sensor provided by the invention is mainly used for monitoring the internal temperature of a heat-sensitive food package. Through the improvement and innovation of materials and processes, the overall performance (such as stability, accurate monitoring performance, good bending adaptability, quick response and the like) and environmental protection performance of the sensor are improved, so that the sensor can be used for monitoring the internal temperature of a heat-sensitive food package.

The present invention is related to a solvent-based composition for preparing an oxygen barrier coating, comprising a binder polymer containing polar functional groups that are capable of interacting with an acidic group; an acid containing at least two reactive acidic groups; and an organic solvent. The present invention is furthermore related to a coated product comprising said oxygen-barrier coating layer, and to a method for making a coated product.

The invention discloses nano cellulose with high lignin content, a preparation method thereof and application of a barrier coating. The preparation method comprises the following steps: mixing a lignocellulose raw material with dilute sulphuric acid for acid pretreatment, and selectively depolymerizing hemicellulose to obtain lignin-rich residues of which the relative content of lignin is higher than that of the raw material; and carrying out mechanical nano fibrillation treatment to obtain the high-lignin-content nano cellulose with the lignin content of 29-60%. The prepared nano cellulose with high lignin content has excellent thermal stability, hydrophobicity and organic compatibility. The surface of paper is coated with the coating material, after hot pressing treatment, the Cobb value of the coated paper is as low as 3.3 g / m < 2 >, the water vapor permeability is only 12.1 g / (m < 2 >. D), grease permeation can be completely blocked, and the coating material has wide application prospects in the field of food packaging.

The present application relates to an organosilicon polymer and a use thereof. The organosilicon polymer comprises a repeating unit generated by a silicon-containing monomer I-1 and an optional silicon-containing monomer I-2 and a repeating unit generated by a monomer II. The polymer or a treating agent containing the polymer can be used for treating various articles such as textiles, paper products, and stones, and provides the articles with an oil and water repelling function.

The present invention relates to a method for manufacturing a laminate (8) comprising a paper substrate and a microfibrillated cellulose (MFC) layer. An MFC suspension containing 50 to 100% by weight of MFC is provided. A wet MFC layer (1) is formed by casting the suspension onto a metal belt support (2), and the dry content of the formed wet MFC layer (1) is 1 to 40% by weight. A paper substrate having a Gurley-Hill air permeability of less than 10,000 s / 100 ml is provided and joined to the wet MFC layer (1) positioned on the metal belt support (2) to form a laminate structure (6). The laminate structure (6) positioned on the metal belt support (2) is dewatered to form the laminate (8). The dewatering includes at least one drying step including drying by at least one non-contact drying device (7), and the metal belt support (2) is heated during at least one drying step. The present invention also relates to the laminate (8) and a packaging material comprising the laminate (8).

The present invention provides a waterproof paper straw and a preparation method thereof, wherein the waterproof paper straw comprises a paper straw body and a PHA waterproof coating coated on the inner and outer walls and cross sections at both ends of the paper straw body, wherein the PHA waterproof coating is obtained by film formation of a PHA water-based coating, and the PHA water-based coating comprises a PHA suspension and an additive. The present invention applies the PHA waterproof coating on the inner and outer walls and cross sections at both ends of the paper straw body, so that the straw is not easy to absorb water and soften, thereby ensuring the use performance; moreover, in the preparation process of the paper straw of the present invention, there is no need to use adhesives, and the PHA coating layer can be used as a hot melt adhesive to bond the seams, thereby ensuring the green safety of the waterproof paper straws. The paper straw of the present invention can be directly recycled, and there is no need to separate the coating and the pulp, and no separation cost investment.

The present invention relates to the field of polymer compounds, and relates to a water-dispersible copolymer, a preparation method thereof and an application. The water-dispersible copolymer provided by the present invention comprises repeating units generated from monomer I, repeating units generated from monomer II, and repeating units generated from monomer III. Monomer I is a carbosiloxane dendritic monomer, monomer II is a cationic monomer with a tertiary amine group, and monomer III is a hydrophilic monomer. The copolymer or a composition containing the polymer can be used for surface treatment of paper and endows the paper surface with strong water and oil repellency.

The present invention relates to a method of manufacturing a fibre-based composite material, to the fibre-based composite material thus obtained, and to the use of the fibre-based composite material for preparing an item.

A process includes the steps: (a) providing a base emulsion; (b) providing a catalyst emulsion; (c) providing a stabilizer selected from silicone polyethers, alkyl alkoxylates, olefinic alkoxylates and polyvinyl alcohols; and (d) combining the base emulsion, catalyst emulsion and stabilizer together to form a curable silicone emulsion.

According to an example aspect of the present invention, here is provided an aqueous dispersion, and a film thereof, comprising an extract comprising suberin, and a dispersant comprising hemicellulose grafted with organic acids or their anhydrides. Further, there is provided a method of manufacturing such aqueous dispersion or film. In addition, the present invention relates to the use of such aqueous dispersion and film.

The present invention relates to the field of new materials, and specifically to a method for preparing an electromagnetic shielding aramid film. The materials used in the method of the present invention are para-aramid nanofibers, multi-walled carbon nanotubes, and electroplating solution. On the basis of maintaining the excellent mechanical properties of the aramid material, the electromagnetic shielding performance is effectively improved, and the method can be applied to the field of electromagnetic shielding, with significant technical effects.