Talc-Based Solutions for Improved Packaging

A new type of paper for packaging that has improved mechanical properties, printability, and recyclability compared to conventional paper. The paper contains short fibers and mineral filler. The paper has a fiber content of 60-95% and a mineral filler content of 2-15% by weight. The mineral filler improves strength and tear resistance. Coated versions of the paper can be made by applying a barrier composition on the paper using techniques like reverse gravure, blade coating, or printer systems. The coated paper has enhanced barrier properties like oxygen, moisture, and grease resistance. The paper and coated paper are suitable for food and pharmaceutical packaging that requires good sealing and barrier properties. The paper is also biodegradable and compostable.

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A sleeve for use inside a bag to provide a three-dimensional shape and prevent wrinkling. The sleeve contains a polyolefin resin and a filler like calcium carbonate or talc. The filler dispersed in an island shape reduces gas permeability compared to a filler-free sleeve. This prevents wrinkling and bag distortion due to moisture changes. The filler also improves barrier properties against oxygen and moisture to prevent contents degradation.

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Laminate sheet and food packaging container with improved moldability and reduced variation during mass production. The laminate sheet contains an inorganic powder like calcium carbonate with specific particle size distributions. The D10 particle size is 0.9-2.9 μm, D20 is 2.2-4.2 μm, D30 is 5.6 μm or less, D40 is less than 0.3 μm, and D50 is 8 μm or less. This particle size distribution improves moldability compared to high powder content laminates. The inner layer contains the powder and resin, outer layers are resin only. The powder content is 40-80% of the sheet, with more powder in the inner layer.

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Sleeve for packaging bags that improves appearance, stackability, and separate disposability compared to traditional paper or plastic sleeves. The sleeve contains a polyolefin resin and filler like calcium carbonate or talc. The filler increases rigidity and reduces dimensional changes from moisture compared to pure polyolefin sleeves. The sleeve is also thicker than a paper sleeve to provide similar rigidity. The thicker sleeve allows more bags per box for better transport efficiency. The sleeve has creases to aid folding into a tubular shape. A bonding part connects the sleeve to the bag body at a different location than the crease. This prevents the sleeve from peeling off the bag body during separate disposal. The filled polyolefin sleeve provides a consistent shape, reduces wrinkling, and improves stackability compared to paper sleeves. It also avoids the issues of oil absorption and fiber residue from paper

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Laminate sheet for food packaging with improved moldability and processability. The laminate sheet contains a high percentage of inorganic powder, like calcium carbonate, in the inner layer. The powder particle size distribution is critical to avoid variations in moldability during mass production. The particle size range is 0.9-2.9 μm (D10), 2.2-4.2 μm (D20), 3.6-5.6 μm (D30), 5.0-7.0 μm (D40), and 6.4-8.4 μm (D50). The inner layer contains more powder than the outer layers. This composition provides stable moldability and processability of the laminate sheet and resulting food packaging containers, even with high filler content.

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A sleeve for a packaging bag that reduces wrinkling, improves stackability, prevents discoloration, and facilitates separate disposal compared to traditional paper or plastic sleeves. The sleeve has a unique construction with a base material layer, a filler layer, and a sealant layer. The filler layer contains a filler like talc to provide rigidity and prevent dimensional changes due to moisture. This prevents wrinkling and bulging in the bag. The sealant layer bonds the sleeve to the bag to prevent separate disposal issues. The sleeve design improves the bag's stackability, appearance, and functionality compared to traditional paper or plastic sleeves.

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Polyethylene resin composition for packaging applications that provides good moldability, film strength, and secondary processability like heat sealability while reducing the amount of resin used. The composition contains calcium carbonate blended into the polyethylene resin. The calcium carbonate comes from an EVA-based masterbatch containing calcium carbonate and EVA resin. At least part of the calcium carbonate is derived from this EVA masterbatch. The proportion of calcium carbonate from the EVA masterbatch is 30 mass% or more of the total calcium carbonate content in the composition. The average particle size of the calcium carbonate derived from the EVA masterbatch is 0.1 to 5.0 microns.

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Laminate sheet and food packaging containers with improved moldability and processability during mass production. The laminate sheet contains an inorganic powder like calcium carbonate with specific particle size distributions. The powder content is 40-80% by mass of the laminate, with D10 0.9-2.9 µm, D20 2.2-4.2 µm, D30 3.6-5.6 µm, D40 5.0-7.0 µm, and D50 6.4-8.4 µm. The inner layer has more powder than the outer layers. The outer layer thickness is 2-20% of the total. This prevents variations in moldability when using high powder content laminates.

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Composite paper made from cellulose fibers and mineral particles derived from purified phosphate sludge. The sludge is treated to remove toxic elements before using it as a raw material in the paper. The composite paper has improved thermal and fire resistance compared to pure cellulose paper. The paper is intended for technical and packaging applications. The sludge treatment reduces heavy metal concentrations to meet environmental standards. The composite paper uses the treated sludge as a replacement for other fillers.

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Sleeve for packaging bags that provides better stackability, appearance, and separate disposability compared to traditional paper sleeves. The sleeve is made of a polyolefin material with fillers like calcium carbonate or talc. The fillers improve rigidity and dead-holding properties without excessive thickness. The sleeve can be easily peeled off from the bag body after use. The filled sleeve gives a 3D shape to the bag, prevents wrinkling, and has stackability. It also prevents moisture absorption from contents into the sleeve.

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A multilayer film for packaging that mimics paper-coated foil and degrades in the environment. The film has a base made of high-density polyethylene (HDPE) with chalk and titanium dioxide fillers. One side is metallized with aluminum nanoparticles. Adding an OXO-biodegradable additive containing transition metal carboxylates allows rapid breakdown of the HDPE under light and heat, making the film biodegradable. The metallized side provides barrier properties and the fillers give rigidity. The paper-like base reduces environmental pollution versus traditional foil. The biodegradability ensures disposal.

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Composite paper for packaging applications made from cellulose fibers and mineral particles derived from purified phosphate mining waste. The paper aims to repurpose phosphate washing sludge as a sustainable alternative raw material in packaging. The sludge undergoes chemical treatment to remove toxic metals. The treated sludge particles are mixed with cellulose fibers to make composite paper. The composite paper has improved thermal and fire resistance compared to cellulose-only paper. It can be further coated with thermoplastic materials for enhanced water resistance.

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A laminated sheet for food packaging with improved moldability, mechanical properties, and appearance. The laminated sheet has an inner layer containing calcium carbonate filler and thermoplastic resin, and two outer layers of thermoplastic resin. The inner layer calcium carbonate filler has calcium carbonate particles with surface treatment containing sulfonic acid or phosphoric acid ester. The calcium carbonate content in the inner layer is 40-80% by mass. The outer layer thickness is 2% or less of the total sheet thickness. This laminate reduces variations in moldability, mechanical properties, and appearance compared to conventional calcium carbonate filler laminates. The surface treatment on the calcium carbonate particles improves dispersibility, reactivity, and reduces void formation during processing.

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Sleeved packaging bags that have improved appearance, stackability, and ease of disposal compared to traditional paper sleeve bags. The sleeves contain fillers like calcium carbonate or talc to provide rigidity without excessive thickness. The fillers also prevent dimensional changes due to moisture. The sleeves have creases to aid folding into a cylindrical shape. The sleeve and bag body are bonded together. The bonding is outside the crease area. This allows easy peeling after use. The bags can have windows in the flat section to show the contents.

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A laminated sheet and a food packaging container made from it that has improved appearance and mechanical properties compared to conventional laminated sheets. The laminated sheet has a inner layer with a high ratio of inorganic powder to resin, typically around 70-90% inorganic powder. This improves strength and rigidity. However, laminated sheets with high inorganic filler content often have poor surface finish. To address this, the inner layer also contains a small amount of lauric acid diethanolamide additive. This improves compatibility between the resin, inorganic powder, and additive, resulting in better appearance and mechanical properties of the laminated sheet.

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Laminated sheet and food packaging container with improved appearance and mechanical properties. The laminated sheet has an inner layer containing a specific ratio of polyethylene, polypropylene, inorganic powder, and lauric acid diethanolamide. The outer layer is polyethylene and polypropylene. The inner layer has a unique composition with a ratio of resin to inorganic powder between 10:90 and less than 50:50. This provides good appearance and mechanical properties compared to similar sheets. The lauric acid diethanolamide improves compatibility between the resins and inorganic powder. The outer layer thickness is 2-10% of the total sheet thickness.

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A three-layer laminated sheet for food packaging that reduces variability in mechanical properties and maintains appearance when filled with food. The inner layer contains calcium carbonate particles with specific particle sizes. The outer layers contain thermoplastic resin. The inner layer has calcium carbonate particles with an average size of 0.7-6 μm and a particle size distribution of 20.1-40 μm. The outer layers have a lower calcium carbonate content. The ratio of inner to outer layer thickness is 2-20%. This blending and thickness balance suppresses heterogeneity in mechanical properties.

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Polyethylene-based resin composition and packaging material that has improved moldability, bag-making processability, and film strength when inorganic compounds like calcium carbonate are added. The composition contains an ethylene-α-olefin copolymer with specific properties and an inorganic compound like calcium carbonate. The ethylene-α-olefin copolymer has 6-8 carbon α-olefin units, a melt flow rate of 0.8-4.0 g/10 min, and a melting point of 90-130°C. The inorganic compound content is 50-80% by mass and the copolymer content is 10-50% by mass. This composition enables better film properties when inorganic compounds are added compared to conventional compositions.

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Composite packaging structure for containers with improved seal strength and barrier properties. The packaging has an inner fiber-containing layer and an outer mineral-containing layer. The outer layer has a density of 1.05-1.65 g/cm3, 4.5-50 lbs/3 msf basis weight, and 20-70% mineral particles. This provides hot tack and seal strength improvements compared to pure polymer layers. The mineral particles can be calcium carbonate. The outer layer can be extruded. The inner fiber layer can contain recycled paper or other fibers. The composite structure allows using less polymer, less filler, and less primer compared to traditional packaging. It also enables recycling the composite by screen filtration. The composite has applications in containers, bags, and pouches for food, beverages, and other products.

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Molding sheet and packaging container with improved strength and impact resistance using a specific size and shape of talc as a filler in the matrix. The talc has an average particle diameter of 2-8 μm and an aspect ratio of 30-50. This talc with small size and high aspect ratio provides significant strength enhancement compared to regular talc fillers when dispersed in the polyolefin resin matrix. The resulting molded sheet and containers made from this composite have improved mechanical properties, particularly impact resistance, compared to conventional biopolymer sheets.

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