Innovations in Glycol-Modified Polyethylene Terephthalate

Biaxially oriented polyester film with non-slip surface, transparency, and easy winding for use in packaging applications like food containers and top seals. The film has two layers, A and B, both containing polyethylene terephthalate (PET). The dynamic friction coefficient of the A layer surface, the friction coefficient between A and B layers, and the haze are controlled within specified ranges to balance slipperiness, transparency, and processability. The film's non-slip surface prevents stacked containers from collapsing when pressed together.

Source

Clear, rigid medical packaging that can be sterilized by autoclave steam without warping or shrinking. The packaging is made by extruding a crystalline thermoplastic like PET, then partially stretching the film, heating it, and thermoforming it into the final shape. This process limits crystal growth to small spherulites rather than large crystals that cause warpage. The film is then sealed around the device and steam sterilized. The spherulitic crystals provide clarity and strength, but the restricted crystal growth prevents warping during sterilization. The packaging can be made by coextruding layers of different thicknesses that are split and stacked by multiplier units to form the final multilayer structure.

Source

A masterbatch for blending PET and PEF resins that enables stable blend molding of PET and PEF without prolonging molding time and achieving fine quality of the resulting molded object. The masterbatch contains a high concentration of PEF as an additive to PET, with specific proportions and intrinsic viscosities. This allows compatibilization of the PET and PEF during processing and avoids quality issues like whitening or strain hardening when blending the resins directly. The masterbatch composition is: PET:PEF ratio of 90:10 mass% or less, and intrinsic viscosity of PEF of 0.50-1.20 dl/g.

Source

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.

Source

Thin, high-resistance polyester film for packaging foods, medicines, and industrial products that provides excellent bag-breaking resistance while maintaining transparency and printability. The film is made by biaxially orienting a blend of 80-100% PET and 0-20% other polyester resin. The film has a specific degree of planar orientation, puncture strength, and elongation ratio. The thin film thickness is 6-10 μm. It has low haze and friction. The film can be laminated with a sealant film for improved sealing properties.

Source

Laminate sheet, container, and food packaging with improved appearance and formability after heat treatment. The laminate sheet has four layers: inner, intermediate, first outer, and second outer. The second outer layer contains a polyester or polycarbonate resin with a high deflection temperature. This provides good formability while maintaining transparency after heat treatment. The second outer layer thickness is 0.5-8% of the total sheet. The laminate sheet can be used to make containers that retain their appearance after boiling. The containers can be filled with food for sterilization while maintaining good appearance.

Source

Biaxially oriented polyester film containing chemically recycled polyester with low melt resistivity to prevent pinner bubbles during production. The film has 20-95% chemically recycled polyester and an alkaline earth metal-phosphorus ratio of 1.0-5.0. It reduces environmental impact by using recycled polyester and allows high film production speed without bubbles. The film can be used in laminates for packaging containers.

Source

Laminated film with improved quality and reduced neck-in during extrusion compared to using just a polyester resin. The film has a base layer and a thermoplastic resin layer on top. The thermoplastic resin layer has an inner polyester layer (first resin layer) sandwiched between an outer non-polyester layer (second resin layer). The key is that the second resin layer has an elongational viscosity of 50-120 Pa·s at 260°C, and the thickness ratio of the second resin layer to the first resin layer is 0.25-4.00. This prevents neck-in during extrusion and provides a stable film. The total thickness of both resin layers is 25-250 μm.

Source

Biaxially oriented polyester film containing chemically recycled polyester to reduce environmental impact and yellow tone. The film has a specific composition of chemically recycled polyester with low levels of low molecular weight components. This prevents film breakage during stretching. The chemically recycled polyester has an inherent viscosity lower than regular polyester, but similar to mechanically recycled polyester. The low molecular weight component content is controlled to avoid excessive breakage. The chemically recycled polyester is derived from decomposing and polymerizing the polyester from used bottles.

Source

Transparent, thermoformed high barrier plastic bottle useful for food and beverage applications, medical applications, personal care applications, and other high-value bottle applications. The bottle includes a multilayer coextruded barrier film, a layer pattern including ethylene vinyl alcohol, alternating with a number of nanolayers, and a layer arrangement with high-end transparency.

Source

Polyester film for packaging that can be laser printed without peeling and maintains transparency. The film contains a layer that can be laser printed with pigments containing metals like bismuth, gadolinium, neodymium, titanium, antimony, tin, or aluminum. The film has a laser-printed layer with 100-3000 ppm of these metal pigments, low haze, and thickness uniformity. The film also has properties like color, refractive index, and shrinkage for packaging applications.

Source

Transparent thermoformed high barrier plastic bottle that is useful for a variety of food and beverage packaging applications, personal care packaging applications, and medical packaging applications. The plastic bottle includes an inner nanolayer sequence including a plurality of polymer layers a) including ethylene vinyl alcohol, alternating with nanolayers b) including at least one of ethylene ethyl acrylate and ethylene acrylic acid, and adhesive layers between each of the amorphous layers.

Source

Gas barrier films, laminates, and packaging containers with improved gas barrier properties, reduced yellowing, and reduced film breakage during manufacturing. The films contain chemically recycled polyester with a specific low molecular weight composition. The chemically recycled polyester has an area ratio of 1.9-5.5% for components with molecular weight 1000 or less in the biaxially oriented film. This balances low molecular weight components for gas barrier properties against reducing yellowing and film strength issues. The films can also have coatings, protective layers, and compositions with oxazoline or urethane groups to further enhance adhesion and barrier performance. The compositions can be used in laminates and containers with improved sealing and barrier properties.

Source

Gas barrier films, laminates, and packaging containers with improved gas barrier properties, reduced yellowness, and reduced breakage during stretching. The films contain chemically recycled polyester with specific molecular weight distribution. The films have a low area (1.9-5.5%) of region with molecular weight <1000. This limits low molecular weight components that can cause yellowing and breakage. The films can be used in gas barrier laminates and containers.

Source

Multilayer film for packaging materials like food and medicine that balances sealing strength, heat resistance, and easy opening when used in high temperature containers like crystallized PET. The film has a sealing layer and surface layer with specific resin ratios. The total polyester resin is 70% or more, with at least 10% crystalline polyester and 20% amorphous polyester. The film also has 1% or more polyolefin resin. This composition provides good appearance after peeling, transparency, and processability while avoiding residue.

Source

Bottle made from a multilayer structure to maintain appearance while reducing environmental impact and cost. The bottle has an outer virgin polyester layer, an inner virgin polyester layer, and an intermediate layer made of mechanically recycled polyester. The recycled layer is between the virgin layers in the stretching section of the bottle. The recycled layer content is 2-50% by weight. This prevents degradation of appearance compared to using just recycled material.

Source

Heat-shrinkable polyester films suitable for recycling into PET bottles without degrading the bottle quality. The films have specific shrinkage properties and chemical composition to match the raw materials used in PET bottle production. This allows recycling the films along with PET bottles without issues like loss of clarity or poor mechanical properties. The films have thermal shrinkage rates in water and melting characteristics similar to PET bottle resin. The composition contains high levels of ethylene terephthalate ester units and dicarboxylic acid comonomers like isophthalic acid. This matches the PET bottle resin composition. The films also have haze and density ranges to avoid issues like pulsing during extrusion.

Source

Film with improved sealing, ease of opening, and transparency properties for packaging applications. The film has a sealing layer made of resins A and B that are incompatible. The resin B has an MFR of 4.5 g/10 minutes or more when measured at 190°C and a load of 2.16 kg, and an MFR of 1.5 g/10 minutes or less when measured under the same conditions. This allows stable sealing and easy opening over a wide temperature range while maintaining transparency.

Source

Food container packaging film that improves visibility, prevents moisture buildup, and allows easy separation and recycling of the packaging. The film is made of two PET layers laminated together, with a coating on the outer layer. The inner PET layer contacts the food. The coating on the outer layer prevents fogging and moisture buildup. The coating can be a polymer solution containing compounds like ethylene glycol, 1,1,1-trimethylolpropane, 1,4-butanediol, isophthalic acid, terephthalic acid, 2,2-dimethyl-1,3-propanediol, diethylene glycol, alkyl sulfosuccinate, cyclohexyl diesters, 1,2-propanediol, talc, and silicon dioxide.

Source

PET bottle with a shrink film derived from a recycled PET resin that maintains transparency and colorlessness when molded into a predetermined shape and recycled. The recycled PET content is 20-50% by weight. The shrink film has low haze and chromaticity coordinates. It uses amorphous PET and limits molecular weight to maintain transparency when recycled. The film is thermally shrunk onto the PET bottle.

Source