Surface Materials and Finishes for Packaging

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

Natural fiber-based transparent composites for food packaging that provide a sustainable alternative to fossil fuel-based packaging materials. The composites are made by UV polymerization of alkene and thiol-based monomers with natural fibers like jute. The UV radiation initiates crosslinking reactions to form a tightly bonded matrix around the fibers, resulting in high transparency (>90%) for packaging applications where visibility of contents is essential. The composites offer benefits of natural fiber composites with improved mechanical properties compared to neat polymer films.

Source

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.

Source

Low opacity, biodegradable, and heat-sealable paper made from cellulose fibers coated with a bio-based wax to reduce opacity and improve barrier properties. The paper has a base sheet of refined softwood cellulose fibers with a basis weight of 10-25 g/m2. It is coated with a transparency agent like a coconut-based wax and a heat-sealable coating like a thermoplastic starch or protein. The coated paper has opacity less than 35% and can be used for packaging without supercalendering.

Source

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.

Source

Stretched packaging film with improved quality and reduced environmental impact by using chemically recycled resin instead of material recycled resin. The stretched film contains a chemically recycled resin, which is made by converting discarded resin into monomers and then polymerizing them. This reduces foreign matter and odors compared to material recycled resin. The chemically recycled resin in the film is less likely to have gels, aggregates, or odors after heat treatment. This improves film quality and appearance when stretched.

Source

Embossed paper packaging material for twist packaging that does not require wax coatings. The packaging material has a base layer made of paper or cellulose that is embossed in sections to allow twisting without cracking. The embossing provides elasticity and flexibility for twist packaging without using wax coatings that can make recycling difficult.

Source

Multilayer film with excellent gas barrier properties, appearance, and recyclability, particularly for wide width films like 500 mm. The film has an outermost layer made of a specific resin composition containing EVOH with 20-50 mol% ethylene content and 90 mol% saponification, and 350-2000 ppm of polyvalent metal ions like Mg, Ca, Zn, Co, Mn. This improves slipperiness between surfaces during extrusion to reduce defects. The film also has inner layers of adhesive and polyolefin resins. The composition allows wide width films with good appearance, gas barrier, and recyclability.

Source

Base paper for metallized paper that provides metallized paper with excellent printability and processability in automatic packaging. The base paper has a resin layer on one side and a pigment coating layer on the other side. The pigment content in the coating is 50-85% by mass. The side with the pigment coating has an Oken smoothness of 300 seconds or more and a dynamic friction coefficient against stainless steel of 0.35 or less. This improves printability and reduces friction when metallizing the paper. The coating layer properties remain after metallization.

Source

Heat sealable film made from propylene derived from bionaphtha that has reduced environmental impact compared to petroleum-based films. The film contains at least 10% bionaphtha-derived propylene units relative to the film mass and 300-1000 ppm of phosphorus-based antioxidant. This composition reduces change in color, transparency, and mechanical properties compared to films with lower bionaphtha content. The film can be used for packaging materials and laminated structures.

Source

A manufacturing method for a stretch film with high transparency and slipperiness for packaging that provides ease of loading and unloading of packaged products. The method involves laminating separate layers of polyethylene (PE) and polypropylene (PP) films using a lamination machine. The resulting laminated film has the advantages of both PE and PP: high transparency from the PP layer and slipperiness from the PE layer. This provides a wide range of packaging films that combine the benefits of transparency and slipperiness for improved product visibility and easier handling compared to using just PE or PP alone.

Source

Packaging container with clear markings and reduced labels by laser marking a core layer containing titanium dioxide. The container is made from a resin sheet with a core layer containing titanium dioxide. Laser marking using carbon dioxide irradiates the titanium dioxide to create black markings on the container. The contrast between the white core and black markings makes the markings stand out. Laser marking instead of labels reduces label usage. The core layer covered by a thin transparent skin layer prevents surface damage from laser irradiation.

Source

Biaxially stretched polyamide film for packaging applications that has reduced thickness while maintaining good transparency and wrinkle resistance. The film has a thickness of less than 12 microns, with standard deviations below 0.8 microns in the machine and width directions. It also has low friction coefficients below 0.9 and a haze value of 7.0% or less. The film contains polyamide 6 as the main component, with preferably 60-98% polyamide 6 content. The reduced thickness, low friction, and low haze properties allow thinner films with good transparency and wrinkle suppression for packaging applications.

Source

A paper food packaging box that increases the perceived quality of packaged food by using a combination of brown and white kraft paper. The outer layer is made of brown kraft paper, while the inner layer is made of white kraft paper. This provides a contrast that elevates the perceived quality of the packaging compared to using just brown kraft paper. The two layers are laminated together using adhesive and heat fusion.

Source

Digital printing on the inside of flexible packaging to add unique codes, promotional content, or varying patterns on the inner layers of flexible packaging using a separate digital printing process before lamination. This involves digitally printing on the laminated film rolls before combining them in the lamination process to create the final flexible packaging. A compensator roll is added to the lamination machine to adjust for the thickness variation from the digital printing. This allows precise, customizable inner printing that can vary per package while remaining regular and safe for products.

Source

Product packaging material with high paper content and transparency to reduce plastic use. The packaging has a pouch formed between a main sheet of unlaminated paper and a transparent front sheet made of either film or cellophane. They are bonded together using water-based adhesive. The paper weight in the packaging exceeds 50% or 60% to increase recyclability. The transparent front allows product visibility while reducing plastic content compared to fully plastic packaging.

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

Recyclable, reusable, and visually appealing packaging cushion made from recycled corrugated cardboard that overcomes the limitations of traditional packaging materials like air cushions and styrofoam. The packaging cushion is created by compactly rolling and compressing used corrugated cardboard boxes into a dense, high-density roll. This roll is then cut into thin, flat sheets that are stacked and compressed into a compact cushion shape. The resulting cushion provides excellent shock absorption and filling properties without the issues of leakage, puncture, static electricity, or contamination associated with air cushions and styrofoam. It also has a clean, uniform appearance compared to shredded cardboard. The compact cushion shape allows efficient storage and transportation of the cushion between shippers and recipients. The cushion can then be recycled or reused by compacting it back into a roll.

Source

Packaging material with improved light-blocking, adhesion, and appearance for preventing light degradation of packaged products. The material has a layered structure with a base, white printed layer, light-blocking printed layer, adhesive, and sealant. The white and light-blocking printed layers contain a specific urethane resin with a polyester polyol derived from sebacic, succinic, or dimeric acid. This resin improves adhesion and appearance compared to conventional light-blocking inks.

Source

Packaging film for articles that can be stretched easily with a small force, has excellent elasticity, and maintains transparency after stretching. The film has an intermediate layer made of a thermoplastic elastomer and surface layers made of a propylene-based elastomer. The propylene-based elastomer is a copolymer of propylene and ethylene. The total content of the propylene-based elastomer in the entire surface layer is 45-95 mass%. The total content of ethylene units in the propylene-based elastomer relative to the entire surface layer is 1-7 mass%. This composition allows the film to stretch easily with low force and maintain transparency after stretching.

Source