Methods to Increase UV Resistance of Polyethylene Films

Multilayer polyethylene film with antimicrobial and UV protection properties, comprising a bi-layer structure comprising an outer layer and an intermediate layer. The film comprises a bi-layer structure comprising an outer layer and an intermediate layer, where the intermediate layer is situated between the outer layer and the inner layer, and the intermediate layer has one to three layers. The film provides enhanced antimicrobial and UV protection through its multi-layer architecture, comprising an outer layer and an intermediate layer.

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Anti-ultraviolet and antibacterial food packaging film comprising a multi-layer structure with specific thicknesses of adhesive layers, where the thickness of the anti-ultraviolet adhesive layer is 5-10 μm. The film is produced through sequential extrusion of layers using an annular downward blowing water cooling process or T-type flat extrusion casting process. This multi-layer structure enables enhanced UV resistance and antibacterial properties in food packaging applications.

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A novel polyethylene (PE) film that combines enhanced UV protection, antibacterial properties, and improved wear resistance. The film features a layered structure with an anti-UV layer on the upper side, an anti-radiation layer on the anti-UV layer, a wear-resistant layer on the surface, and an antibacterial layer on the lower side. This multi-layered approach addresses the film's previously identified shortcomings in these critical properties.

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A polyethylene film preparation process that addresses the issues of poor anti-fog and anti-ultraviolet properties in existing polyethylene films. The process enables the production of polyethylene films with enhanced anti-fog and anti-ultraviolet properties through a novel combination of additives and processing conditions. The film's improved performance enables applications such as automotive glass, display screens, and solar cell windows that require enhanced visibility and UV protection.

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A high-barrier anti-UV packaging bag that extends shelf life of vacuum-packaged food by preventing food degradation through controlled UV exposure. The bag features a sequentially stacked structure with an anti-UV layer, adhesive layer, BOPA layer, adhesive layer, and PE layer. The anti-UV layer, adhesive layer, and BOPA layer are integrated as a single layer, while the adhesive layer and BOPA layer serve as additional anti-UV layers. The bag's unique sliding sealing features ensure continuous sealing even after repeated food removal, preventing food exposure to UV radiation. The bag's design enables multiple reuse while maintaining barrier properties.

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High-barrier composite film for food packaging that combines enhanced UV protection with improved oxygen and water barrier properties. The film incorporates titanium quantum dots on nano-titanium dioxide surfaces, where the quantum dots' enhanced UV absorption capabilities are combined with the film's oxygen and water barrier properties. This composite film achieves superior UV protection while maintaining high oxygen and water barrier performance.

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UV-resistant PET film for food packaging that combines enhanced thermal insulation with enhanced durability and resistance to scratches and punctures. The film comprises a base film, a heat insulation layer bonded to the base film, a UV-blocking layer bonded on top of the insulation layer, a reinforcement layer bonded on top of the UV-blocking layer, and a protective layer bonded to the top of the reinforcement layer.

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Anti-UV film with enhanced UV resistance through a novel masterbatch composition that combines polyethylene resin with a specially formulated anti-UV masterbatch containing modified illite and lignin. The masterbatch, prepared by incorporating the anti-UV masterbatch into a polyethylene resin matrix, provides improved UV protection while maintaining mechanical properties. The masterbatch's unique composition enables enhanced UV absorption and scattering, while the polyethylene resin provides the film's overall structure and barrier properties. The masterbatch is prepared through a process that combines the anti-UV masterbatch with modified illite and lignin, ensuring uniform dispersion and compatibility.

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Transparent polyethylene (PE) film for UV protection in packaging applications, particularly for medical, food, and hygiene products. The film incorporates phosphite antioxidant masterbatch and talcum powder particles within the corona layer, creating a uniform distribution of these additives. This particle distribution enables the formation of a uniform film structure through the vacuum principle, resulting in a film that maintains its transparency while providing effective UV protection.

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High-barrier food packaging bag with improved moisture and gas barrier properties that prevents damage to the bag during use. The bag has a composite film structure with an outer layer, barrier layer, and inner layer. The barrier layer sandwiches an aluminum foil layer between two high-barrier aluminized film layers. Adhesive layers on either side bond the foil and the outer/inner film layers to restrain them during use and prevent damage from friction. The adhesive layers also block UV radiation to prevent food degradation inside the bag.

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Composite film and packaging bag for food products that addresses the issue of visibility and oxygen/moisture barrier properties in packaging like sauce packets. The composite film has layers of UV blocking, polyamide (PA), and ethylene vinyl alcohol co-polymer (EVOH). The UV blocking layer prevents light oxidation of the contents after the bag is opened. The PA layer improves flexibility and prevents cracking from repeated kneading. The EVOH layer provides oxygen and moisture barrier properties.

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A composite auxiliary agent for improving weather resistance and tensile properties of linear polyethylene film materials. The agent comprises a blend of nano styrene-butadiene rubber nucleating agent, phenolic antioxidant, phosphite, anti-UV stabilizer, and hydrated magnesium silicate. The agent is formulated at a concentration of 2-4% in linear polyethylene film materials and is prepared through a combination of melt processing and extrusion techniques.

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Anti-UV masterbatch for polyethylene films with enhanced UV protection. The masterbatch comprises a polyethylene matrix with UV-absorbing additives, carrier, and dispersant. The film structure features an outer layer, interlayer, and inner layer, with the outer layer containing UV-absorbing additives, interlayer containing UV-absorbing additives, and inner layer containing UV-absorbing additives, carrier, and dispersant. The masterbatch achieves UV protection through a combination of UV-absorbing additives, carrier, and dispersant in the film structure.

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UV-resistant PET film for food packaging that maintains transparency while providing light protection. The film combines the optical clarity of PET with enhanced UV blocking properties, eliminating the need for opaque additives or substrates. The film achieves this through a unique formulation that balances transparency with UV absorption, enabling direct product display while meeting food packaging requirements.

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PE anti-ultraviolet heat shrinkable film with enhanced UV resistance through a novel composite approach. The film comprises an outer layer, a middle layer, and an inner layer, with the outer layer containing a specific blend of polyethylene (PE) and polypropylene (PP) components. The middle layer contains salicylates, benzotriazoles, and chlorobenzotriazoles as UV stabilizers. The inner layer serves as a barrier against moisture and maintains the film's structural integrity. The film's unique composition enables effective UV protection while maintaining its shrinkage characteristics, making it suitable for applications requiring both UV resistance and shrinkage stability.

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Antidegradant blend for stabilizing polymers, particularly polyolefins, that addresses the limitations of conventional acid scavengers. The blend combines a metal carboxylate, an inorganic phosphite, and an organic phosphite antioxidant. The phosphite-antioxidant combination enhances the phosphite's solubility in polymers, particularly in high-temperature applications, while the metal carboxylate acts as a pH buffer to maintain a stable pH environment. This synergistic blend provides superior color stability and melt flow properties compared to conventional acid scavengers alone.

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UV-resistant transparent high-barrier packaging film for food packaging that enhances shelf life through enhanced barrier properties. The film comprises a UV-resistant masterbatch and a seven-layer co-extruded composite film comprising an attapulgite intercalation modified montmorillonite composite nano-filler. The attapulgite intercalation modification creates a large-scale limited interpenetrating network structure in the polymer matrix, significantly increasing barrier properties.

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A processing technology for enhancing the durability of polyethylene (PE) bags through a novel combination of additives. The technology involves combining linear low-density polyethylene (LLDPE), low-density polyethylene (LDPE), high-density polyethylene (HDPE), ultra-low-density polyethylene (ULDEP), and ultra-high-density polyethylene (HDPE) to form PE bags. The formulation includes a specific blend of hindered phenolic antioxidants, phosphites, and thiols. The additives work synergistically to prevent oxidation and degradation of polyethylene, resulting in improved mechanical properties and service life of the PE bags. The formulation enables the production of PE bags with enhanced resistance to cracking, abrasion, and aging.

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UV blocking film for food packaging materials that provides long-term protection against light degradation without affecting the transparency or appearance of the packaging. The film contains a barrier layer with a natural product like carotenoids and a UV absorbing compound. This allows blocking of UV light without making the packaging opaque. The natural product provides oxygen and moisture barrier properties. The film can be produced by coating a composition containing the barrier layer components onto a base substrate.

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Preparation method for nanostructured UV-A resistant coatings for PET food packaging films that enhance their UV protection through nanostructured UV-A absorbing properties. The method involves creating nanostructured UV-A absorbing coatings through a controlled synthesis process that incorporates nanostructured materials with enhanced UV absorption properties. These nanostructured materials, when incorporated into PET films, significantly improve the UV protection of food packaging films through their nanostructured structure that absorbs UV radiation.

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