Titanium Dioxide Solutions for Opacity Control

Paper-based packaging film with improved light barrier, moisture barrier, and recyclability for food products like butter and margarine. The film has a paper component, a polymeric film, a metallic flake layer printed on the polymeric film, and a white pigment layer between the metallic flake layer and the paper. The metallic flake layer provides light blocking, the white pigment layer enhances paper appearance, and the adhesive between the layers enables clean separation during recycling. The metallic flake grammage is kept low to balance barrier and recyclability.

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Display body like packaging with white printing layers that can be laser printed without delamination or color change. The display body has a white printing layer that allows laser printing. The printing layer contains pigments like titanium oxide or calcium carbonate that change color to black when lasered. The printing layer has a specific void content (10-80%) and void height (1-8 um) to efficiently absorb laser energy. This improves print density without reducing mechanical strength. The non-printed regions remain white. The white printing layer is laminated on the substrate without intermediate layers to prevent delamination.

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Laminate sheet and food packaging container with reduced variation in hiding power when filled with a high percentage of inorganic powder. The laminate sheet has a three-layer structure with an inner layer containing the inorganic powder, and outer layers without the powder. The powder particle size distribution is optimized: D20 2.0-3.4 μm, D50 4.8-7.6 μm, D70 7.7-11.6 μm. The inner layer has higher powder content than the outer layers. The powder content is 40-80% by mass of the laminate sheet. The outer layer thickness ratio is 2-20% of the total sheet thickness. This configuration suppresses hiding power variation when producing sheets with high inorganic powder content.

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Laminated sheet and food packaging container with reduced hiding variation when filled with a high content of inorganic powder. The laminate sheet has a specific particle size distribution for the inorganic powder, with D20 of 2.0-3.4 μm, D50 of 4.8-7.6 μm, and D70 of 7.7-11.6 μm. The inner layer contains more inorganic powder than the outer layers. The thickness ratio of the outer layers is 2-20%. This reduces hiding powder variation during mass production. The laminate sheet can be used for food packaging containers.

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Laminate for packaging bags that improves recyclability and concealment of contents. The laminate has a substrate made of stretched or irradiated polyethylene or polypropylene. The substrate and sealant layer are both made of the same polymer. At least one of the substrate or sealant layer contains a white pigment. An intermediate layer between the substrate and sealant can also have the white pigment. This allows concealing contents without reducing bag strength. The pigmented layers improve recyclability compared to using different polymers.

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A packaging material that provides bright white appearance, high light blocking, low additive levels, and uniform color across all viewing angles. The packaging material is a wall composition for containers that contains a polyester, a small amount of oriented polymethylpentene, and a small amount of light scattering pigment. This composition has a synergistic effect when subjected to orientation stress, allowing for reduced amounts of the components compared to traditional opaque packaging. The resulting package walls have high lightness, low color difference across angles, and high light barrier without swirl or pearlescence.

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Laminated film and packaging bags made from polyethylene-based resins that can be easily recycled while maintaining properties like stiffness, water vapor barrier, and light blocking. The film structure involves a base film with a high melting point PE and a sealant film with a lower melting point LLDPE. At least one layer of the film contains a colored filler. This allows recycling with mono-material PE bags while still providing desirable properties. The sealant film can have a multi-layer structure with the colored filler in an inner layer. The colored filler can be white, black, or a combination. The filler loading is 10% or less based on film weight.

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Food packaging material with improved hiding properties and recyclability compared to transparent packaging. The material uses an opaque adhesive layer sandwiched between transparent films. The opaque adhesive is made by mixing a urethane adhesive with ink pigments. This opaque layer prevents colors from transferring between the films and improves hiding properties. The transparent films can be recycled separately from the opaque adhesive. The adhesive formulation uses specific ink pigment, solvent, and dispersant amounts to optimize adhesion and opacity.

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An aqueous white ink composition for surface-printed flexible packaging that provides improved properties like heat resistance, blocking resistance, alcohol resistance, abrasion resistance, solid uniformity, and bleeding resistance compared to conventional inks. The ink contains a white pigment, an acrylic resin emulsion with a specific glass transition temperature range, N-oleoyl sarcosine, a hydrazine compound with multiple hydrazine groups, and wax. The acrylic resin content is 3-40% by weight and has a glass transition temperature of -40 to 30°C.

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Aqueous white ink composition for printing on flexible packaging that has improved heat resistance, blocking resistance, alcohol resistance, abrasion resistance, solid uniformity, and bleeding resistance compared to conventional inks. The ink contains a white pigment, an acrylic resin emulsion, N-oleoyl sarcosine, a hydrazine compound, and wax. The acrylic resin has a glass transition temperature of -40 to 30°C and a solid content of 3-40%.

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Single-layer opaque plastic bottle with high light protection that achieves nearly complete light occlusion. The bottle is made from a single layer of plastic containing a specific filler composition. The filler is dispersed in the plastic during manufacturing to provide high light blocking without needing multiple layers or coatings. The filler composition includes a white pigment like titanium dioxide (TiO2) along with an additional filler like aluminum (Al) that absorbs light without reflecting it. This combination provides both hiding power and high light absorption to make the bottle nearly opaque.

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Packaging material with excellent light shielding properties for preventing light-sensitive products from deteriorating. The packaging has a transparent layer and a colored layer in sequence from the outer side. The colored layer is composed of three layers in order: silver, white, and black. This stacking order provides superior light absorption compared to other layer sequences. The silver layer reflects light, the white layer scatters light, and the black layer absorbs light. This prevents light transmission through the colored layer and protects the inner contents.

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Packaging material for retortable packages that can withstand sterilization by heat and steam. The material has a coated paperboard layer with a pigment coating containing calcium carbonate, clay, binder, and zirconium crosslinker. This coating allows printing decorations that retain quality after sterilization compared to uncoated paperboard. The pigment composition with calcium carbonate and clay provides a stable, printable base for the retortable packaging.

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Composition for fusion-adhesive packaging paper that melts completely when heated and improves the physical properties of fusion-type paints. The composition contains ethylene-vinyl acetate copolymer (EVA) and an EVA white pigment made by mixing titanium oxide with EVA. The EVA has specific vinyl acetate content and melt index to ensure quick melting. The composition also contains a modified polyolefin-based elastomer and additives like glyoxal and phosphoric acid. The packaging paper made from this composition melts quickly when heated during application of fusion-type paints, preventing moisture ingress and improving paint properties.

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Multilayer film for packaging with improved hiding properties and cold impact resistance. The film has a heat sealing layer containing propylene homopolymer and/or copolymer resin, and a concealing layer with propylene-ethylene block copolymer resin, ethylene-propylene copolymer elastomer, and titanium oxide. The concealing layer contains 0.10-30.00% titanium oxide by mass based on the hiding layer total. This allows the film to have sufficient hiding properties without compromising cold impact resistance.

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Contact lens packaging container and product that blocks light to protect the lenses and solution inside. The container is made of a plastic material with a toner dispersed in it. The toner provides light blocking properties without changing the container color. The toner concentration and container thickness are optimized to achieve a minimum 20% light blocking rate in the visible spectrum. This prevents degradation of lens components and allows visibility of the lenses and solution inside.

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White packaging material with high light barrier, brightness, and uniform color appearance across viewing angles. The packaging uses a wall composition containing a polyester, oriented polymethylpentene, and a light scattering pigment. The ratio of polymethylpentene to light scattering pigment is 5:1 to 1:5. The wall is produced by orientation stress. This composition provides a goniochromatic appearance with constant color across angles, high lightness, and excellent light barrier. It allows low pigment levels for whiteness without tradeoffs.

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A packaging container and product for contact lenses that blocks light to protect the lenses and solutions inside. The container is made of a plastic material with a toner dispersed in it. The toner contains particles like rubber. The container blocks at least 20% of light in the visible spectrum when measured with a spectrophotometer. This prevents excessive light exposure that can degrade the contacts and solutions. The toner particles disperse in the plastic during manufacturing to create the light-blocking container.

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Contact lens packaging container with a color to block light and protect lens contents. The container is made by dispersing a color powder in the plastic material used to mold the container. The container has a light blocking rate of at least 20% in the visible spectrum. This prevents excessive light exposure of the lens and buffer solution inside. The color powder dispersal can be a single step or multiple steps.

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A packaging material that provides excellent light-shielding and concealing properties without using aluminum foil or aluminum vapor-deposited film. The packaging material has a pattern layer on the back side of a transparent printing base film. A concealing layer directly contacts the colored solid layer. The concealing layer contains a white solid layer made with aluminum paste dispersed in a polyurethane resin binder. This white layer provides light-shielding and concealing properties without using aluminum foil or vapor-deposited film. It allows metal detectors to be used and prevents appearance defects from attacking aluminum. The white layer also provides sufficient whiteness for design. The concealing layer can also have multiple white layers.

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