Aqueous Cleaning of Packages

Nonwoven water-dispersible materials like webs, pouches, and packets with improved properties for applications like laundry detergent packets. The materials are made by blending polyvinyl alcohol (PVOH) fibers with specific other fiber-forming materials like PVOH itself, avoiding cellulose derivatives like CMC, HPMC, or starch. The blended fibers have improved solubility, dispersibility, and compatibility compared to single-polymer PVOH fibers. The blended fibers are used in nonwoven webs, pouches, and packets that can quickly dissolve in water without residue or clumping. The blended fibers also reduce stickiness and allow better dispersion of contents. The blended fiber webs can be layered or laminated for strength and barrier properties. The blended fiber pouches can contain laundry detergent without residue or clumping. The

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A process for separating polymer layers in multilayer packaging films like blister packs without using multiple organic solvents or hazardous reagents. The process involves treating the multilayer films with an aqueous solution containing an alkali metal salt of an amino acid and optionally a surfactant. This dissolves the adhesives between layers and aluminum, allowing separation. The layers can be further treated with a fluid medium to separate any remaining layers.

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A PET bottle processing device that simultaneously separates accessories from the bottle body and cleans the bottles. The device has two rotating shafts inside a case with radial protruding blade members. The shafts rotate out of phase to peel labels, caps, and release contents. Water showers the bottles while they're being processed. The blades transport the bodies to an upper discharge and washwater carries accessories to a lower discharge. This integrated cleaning and separation reduces processing time and device size compared to separate steps.

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Water-soluble nonwoven webs for packaging irritating chemical compositions. The webs contain fibers made from modified polyvinyl alcohol (PVOH) like sulfonated PVOH. This allows the pouch to quickly and completely dissolve in water without residue. The modified PVOH fibers have higher hydrolysis degrees and sulfonate content to enhance water solubility. Adding carboxylated PVOH or polyvinylpyrrolidone (PVP) fibers in blends can further improve solubility. The modified PVOH fibers prevent sticking and discoloration when stored with chemical contents. The pouch compositions can include harsh chemicals like pool and water treatment products.

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Food packaging containers with a surface layer that has water and oil repellent properties to improve cleaning and recyclability. The containers are manufactured using a multi-layer structure sheet with a surface layer containing silica powder. The silica powder has low density, making it difficult to mix with the polymer resin. The manufacturing method involves a specific process to evenly distribute the silica powder in the surface layer. The containers are made by extruding the multi-layer sheet. The water and oil repellent surface allows food residue to be easily cleaned off, improving recyclability by preventing contamination of the recycled material.

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A cheaper method to remove PVC labels from PET bottles without using expensive machines. The method involves treating the labeled bottles with hot water to completely remove the PVC labels. This allows efficient recycling of the PET bottles without the need for specialized equipment. The hot water treatment fully removes the PVC labels from the PET surface, preventing contamination during recycling.

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Water-soluble packaging with improved cold water solubility, ease of processing, and flexibility for consumer products like cleaning and therapeutic items. The packaging has a thin foam structure inside made from a water-soluble film material with a low level of surfactant. The foam has dispersed air bubbles smaller than the matrix thickness. The surfactant stabilizes the foam structure and enhances solubility in cold water. The foam packaging has better cold water solubility, sealability, and film strength compared to non-foamed water-soluble packaging.

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Integrated machine for continuous, sequential and integrated process of chopping and washing multi-layer plastic packaging waste. The machine has a single unit that combines the functions of shredding and washing multi-layer plastic packaging waste. This eliminates the need for separate machines and reduces processing time. The integrated machine is designed to handle various types of multi-layer plastic packaging waste like bags, coffee, candy, snack and soap packaging. The machine dimensions are approximately 1-1.5 meters in length, 0.5-0.7 meters in width, and 0.8-1.2 meters in height.

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Integrated system for cleaning and removing labels from plastic bottles in a single machine to improve efficiency, reduce costs, and minimize waste compared to separate label removing and cleaning steps. The system includes a label removing and cleaning machine, bouncing separation screen, cleaning liquid separator, and buffer tank connected in sequence. The label removing machine cleans while removing labels. The screen separates labels, impurities, and water. The separator purifies the water for reuse.

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Integrated system for cleaning and removing labels from plastic bottles that reduces equipment, time, and cost compared to separate label removal and cleaning processes. The system has a label removing and cleaning machine, bouncing separation screen, cleaning liquid separator, and buffer tank sequentially connected. The label removing machine cleans and removes labels as bottles feed through. The bouncing screen separates labels, impurities, and water. The separator filters the water for reuse. This integrated system allows label removal and cleaning in one machine, reducing steps and equipment compared to separate label removal and cleaning processes.

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Integrated system for cleaning and removing labels from plastic bottles that reduces equipment, time, and cost compared to separate label removal and cleaning steps. The system has a label removing machine, bouncing separation screen, cleaning liquid separator, and buffer tank connected in sequence. The label removing machine cleans and removes labels while the screen separates labels and impurities from the main material. The cleaning liquid separator filters and recycles the water. This integrated design enables label removal and cleaning in one step with improved efficiency and resource conservation.

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Washable labels for reusable and recyclable packaging that can easily be removed by washing. The label has a discontinuous pattern of spacing agent over the adhesive, shielding some areas from sticking. The spacing agent thickness is 0.5-200 microns. This allows adhesion during storage/use but washing removes the label. The discontinuous pattern facilitates washing by providing channels for water to reach uncoated adhesive.

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Water-soluble packaging for laundry and dish detergent pods that dissolves completely in water and leaves no residue. The packaging has a thin, flexible water-soluble foam matrix with a thickness of 30-200 microns. It contains a film-forming material like PVOH and at least 8% anionic surfactant like sodium lauryl ether sulfate. The thin foam matrix provides good solubility in cold water, flexibility, and heat sealability.

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Automatic PET bottle compressor that can compress, label remove and clean recycled PET bottles. The compressor has an opening unit to insert the bottle cap, a washing unit to spray water inside, a compression unit with a rising press, and a transfer unit to move the bottle. This allows automated processing of recycled PET bottles by compressing, removing labels, cleaning, and transferring them. It reduces volume, improves recycling quality by separating label material, and automates the process. The compressor has a gripping cap, washing pump, rising press, and transfer arm.

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Solvent-based polyurethane adhesive for bonding flexible packaging materials that can be debonded by water treatment. The adhesive composition contains a polyurethane polymer made by reacting polyether polyol and polyisocyanate. It also has organic solvents like ethyl acetate and ethanol. The adhesive cures to bond flexible packaging layers like polyolefins or polyesters. Treating the bonded packaging with water debonds the layers for recycling.

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Antibacterial and antiviral detergent composition that uses natural ingredients like propolis extract, seaweed polysaccharides, and quaternary ammonium salts to provide effective cleaning and disinfection. The composition also contains citric acid, salt, aroma oils, emulsifiers, thickeners, and biodegradation catalysts. It avoids synthetic chemicals and has applications in detergents, packaging materials, and disinfectants.

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Drug packaging film that is water-soluble and chemically resistant to liquid detergents. The film contains a polyvinyl alcohol (PVA) resin, a plasticizer, and a water-soluble starch. The starch is dissolved in water at 50°C for 30 minutes before adding it to the film. The starch content is 4% or less to maintain film tension. The PVA resin can be modified with sulfonic acid or pyrrolidone ring groups to improve chemical resistance and water solubility. The film is used to package liquid detergents.

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A composition to enhance the cleaning efficiency of glass bottles with labels without damaging the labels or corroding the glass. The composition contains water, sodium gluconate, trimethylamine phosphonic acid, and C6 alkyl glucoside in specific ratios. This mixture improves bottle washing performance compared to just caustic soda, reduces label damage, and prevents glass corrosion. The composition allows easier label removal, reduced label peeling, color fade, and glass thinning compared to using caustic soda alone.

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Water-soluble packaging film with increased water carrying capacity for products like laundry detergent without changing the water solubility, thickness, or hydrolysis rate of the film. The film has a polyvinyl alcohol (PVA) layer and a coating layer formed by adding a specific emulsion to the PVA during production. The coating contains materials like soybean fatty acid alkyl emulsion, propylene glycol, silicone-free glyceride fatty acid, and a cationic surfactant solvent. This coating increases the water holding capacity of the film without affecting its water solubility.

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Water-soluble film for packaging drugs like detergents that maintains good mechanical strength and solubility. The film contains a polyvinyl alcohol-based resin with specific crystallinity ratios on its surfaces. By adjusting the crystallinity indexes on the two sides of the film, both water solubility and mechanical strength are optimized for packaging liquid items like detergents. The crystallinity ratios should satisfy certain formulas. This allows the film to have high solubility for packing liquids while preventing deformation or breakage.

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