Nucleation Technologies for Crystallization Control

A PVDC (polyvinylidene chloride) emulsion for pharmaceutical packaging that provides improved barrier properties, thermal stability, and long-term stability compared to conventional PVDC emulsions. The emulsion is made by using a silica sol as the dispersant instead of traditional surfactants. This avoids issues like decomposition, hydrolysis, migrant formation, crystallization, and poor thermal stability when heating. The silica sol also improves the water vapor barrier performance of the coating. The PVDC emulsion formulation contains 35-50% vinylidene chloride monomer, 0.5-5% comonomer, 0.1-0.5% initiator, 0.01-0.1% stabilizer, 5-7% silane coupling agent modified silica sol, and 30-5

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Tobacco packaging material to reduce leakage of flavoring components and deterioration of appearance compared to conventional packaging. The packaging has a paper layer containing flavoring components sandwiched between a barrier layer and a masking layer. The barrier layer prevents flavoring leakage, and the masking layer hides any flavoring crystallization on the outer surface. The barrier layer can be applied by coating, printing, or extrusion. The masking layer can be applied by coating or printing. The barrier and masking layers prevent flavoring component leakage and crystallization, respectively.

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Tobacco packaging material and package that reduces leakage of flavoring components and deterioration in appearance. The packaging material has a paper layer containing the flavoring component and a barrier layer made of a non-metal material. The barrier layer prevents flavor leakage. Optionally, an inner masking layer and outer coat layer are added. This configuration reduces flavor migration while avoiding issues like crystallization and discoloration. The packaging material can be used to create tobacco product packages with reduced flavor leakage and appearance issues compared to metal-based packaging.

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Degradable plastic bottle for pesticides that can meet the storage requirements of pesticide products. The bottle is made by melt extrusion of a resin blend containing polylactic acid (PLA), polybutylene adipate terephthalate (PBAT), polymethyl ethylene carbonate (PMEC), polyglycolic acid (PGA), and calcium carbonate. The resin mixture is extruded into a preform, which is then blown into the final bottle shape. The PMEC and PGA nucleate PLA crystallization, improving its crystallinity without decreasing barrier properties compared to PLA blends without these additives. The calcium carbonate reinforces the bottle. The degradable bottle can be recycled and degrades under biodegradation conditions.

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Packaging material for tobacco products that prevents flavor seepage and appearance degradation when using fragrances. The packaging has a paper layer containing the flavor, a barrier layer against flavor seepage, and optionally a hiding layer to conceal the flavor layer. The barrier layer is non-metal to avoid contamination. This prevents flavor migration outward and crystallization issues. The hiding layer covers the flavor layer to prevent seepage. The barrier and hiding layers suppress flavor seepage and prevent flavor crystallization from deteriorating appearance.

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Stand-up pouch packaging with improved resistance to pinhole defects during transportation. The pouch has a unique film composition where the crystallinity of the base layer in the main films is higher than the base layer in the bottom film. This reduces pinhole formation during distribution compared to equal crystallinity base layers. The main films have crystallinity 15 points or more higher than the bottom film. The crystallinity range for the main films is 35-95% and for the bottom film is 5-35%.

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Degradable plastic bottle made from a unique blend of biodegradable polymers that improves the mechanical properties and barrier performance compared to existing degradable bottles. The bottle is blow molded from a resin mixture containing PLA, PBAT, PPC, PGA, and calcium carbonate. The PPC and PGA polymers enhance the crystallinity of the PLA, improving its strength and barrier properties. The degradable bottle can hold pesticides without leaching solvents due to the higher crystallinity PLA.

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Heat shrinkable film, label, and packaging material with improved properties for heat shrinking containers. The film has a copolyester resin with controlled crystallinity. The crystallinity is adjusted to have a specific difference in reversible heat capacity before and after the glass transition temperature. This provides better balance between thermal properties like shrinkage and chemical resistance compared to conventional polyester films. The film can be made by preparing the copolyester, casting it into a film, and then heating and stretching it to set the crystallinity.

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Water-soluble film made of polyvinyl alcohol (PVA) that dissolves rapidly in water while minimizing residue formation and deformation during storage. The film has a specific range of crystal structure properties measured by X-ray scattering. The crystal long period in the film after immersion in a water/methanol solvent is 10-30 nm. The rate of increase in crystal long period after immersion compared to before is 30-130%. This controlled crystal structure allows fast dissolution in water without excessive residue formation and prevents film deformation during storage. The film can be produced by adjusting factors like drying conditions, crosslinking, and additives to achieve the desired crystal structure.

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Multi-cup packaging arrangement and polypropylene sheet for producing it that allows easy breakage of the cups along predefined lines by bending the sheet. The packaging has multiple cups connected by bridges. The sheet has grooves on the bottom surface that divide it into segments. Bending the sheet towards the top breaks it along the grooves, separating the segments with the cups. The groove depth is 25-80% of the sheet thickness. This allows snapping the cups off in a predictable way. The snappability is achieved by using polypropylene with specific properties like nucleating agents and fillers.

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Polyester film for heat shrinkable labels and packaging that has improved shrinkage characteristics and sealing properties compared to conventional polyester films. The film is made from a copolyester resin with specific diol and dicarboxylic acid components. The copolyester has a narrow crystallization-melting temperature difference of 100°C or less. Treating the film with a 1% NaOH solution at 85°C for 15 minutes results in an endothermic peak at 100-150°C when scanned by DSC. This modified film has reduced shrinkage stresses, improved sealability, and reduced cracking compared to untreated polyester films. The specific copolyester composition enables better shrinkage uniformity and shrinkage control during high temperature processes like labeling and packaging.

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Cellulose-based wrapping paper with transparent areas that can be easily manufactured without the need for plastic windows. The paper has cellulose layers with paraffin coating on one side that crystallizes into a transparent zone. The paraffin coating is applied to one side of the cellulose paper and allowed to crystallize, creating the transparent zone. This is done during the paper manufacturing process. The paraffin coating forms a crystalline structure that allows light transmission through the paper. The transparent zones can serve as windows in packaging materials. The paper can be made without separate plastic window materials, reducing cost and complexity.

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A water-soluble film made of polyvinyl alcohol (PVA) with optimized surface crystallinity for packaging drugs. The film has a specific range of crystallinity index near the surface, calculated using diamond and germanium prisms in ATR-FTIR analysis. This range is Fd1/Fg1 > 1.04 for the surface measured with diamond, and Fd2/Fg2 > 1.04 for the opposite side measured with germanium. The surface crystallinity should be higher than the bulk to balance mechanical strength and water sealability. Adjusting the PVA composition, plasticizer, and processing conditions achieves this.

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Polyester film for heat shrinkable labels and packaging that has controlled crystallinity for improved thermal and chemical resistance. The film contains a copolymerized polyester resin with three or more diols and a dicarboxylic acid. The film has a difference in heat capacity of 0.25 J/g·K or more before and after the glass transition temperature, measured by DSC. This controlled crystallinity balances thermal and chemical properties.

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Biodegradable starch-based polymer composition with ionic liquid plasticizers for sustainable packaging. The composition involves blending native starch, biodegradable polyester, and an ionic liquid plasticizer to create a thermoplastic starch film that is stable under varying humidity conditions and has improved mechanical properties compared to traditional starch blends. The ionic liquid plasticizer prevents retrogradation and maintains stability even after storage. The composition offers an eco-friendly alternative to synthetic plastics for packaging applications.

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A polyolefin sheet with improved properties for press-through packaging applications like blister packaging. The sheet has a layer made from a composition with specific ingredients to provide excellent transparency, moisture resistance, and divisibility. The composition contains high-density polyethylene (HDPE), a crystal nucleating agent, a thermoplastic resin like petroleum resin, and an incompatible thermoplastic resin with high storage modulus. This composition allows the sheet to have superior transparency, moisture resistance, and tearability compared to conventional polyethylene sheets.

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Two-component curable adhesive for packaging materials that reduces the formation of toxic aromatic amines in food contact applications. The adhesive contains a specific composition of isocyanate prepolymer, biuret derivative, and urea derivative. The biuret and urea derivatives suppress crystallization and cloudiness in the prepolymer. They also promote faster reaction of the isocyanate groups with water to reduce amine formation. The biuret derivative content is 0.4-20% of the isocyanate composition, with a ratio 1:1 or higher biuret:urea.

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Water-soluble packaging film that prevents clouding and seal defects over long storage periods. The film is made from polyvinyl alcohol (PVA) with added chemical stabilizers to improve chemical resistance without compromising water solubility. The stabilizers prevent deterioration like clouding and sealability loss during storage. This allows the film to maintain good appearance and sealing properties after packaging.

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A polyolefin sheet with excellent secondary processability, moisture resistance, transparency, and divisibility for press-through packaging materials. The sheet has a layer made from a thermoplastic resin composition containing specific components. It uses high-density polyethylene (HDPE) as the main resin, a crystal nucleating agent, a thermoplastic resin like petroleum resin, and a thermoplastic resin incompatible with HDPE that has a high storage modulus. This composition improves the sheet's divisibility for easy tearing compared to pure HDPE. The sheet has applications in press-through packages for pharmaceuticals and food products that need transparent, moisture-resistant, and easily tearable packaging material.

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Laminate packaging material that can be easily torn after heat treatment like retort processing, while still having high recyclability. The laminate has a base layer and a sealant layer both made mostly of polypropylene. The sealant layer contains a nucleating agent to improve cuttability. The sealant layer thickness is 30-95% of the total laminate thickness, and 20-200 microns. This allows the sealant layer to dominate cuttability after heat treatment. The high polypropylene content of 90% by mass also improves recyclability.

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