In-Mold Labelling for Permanent Graphics
120 patents in this list
Updated:
In-mold labeling faces critical challenges in achieving permanent, high-quality graphics while maintaining material compatibility for recycling. Current processes struggle with air bubble formation between labels and containers, with studies showing trapped air pockets can affect up to 15% of labeled surfaces, leading to delamination and quality issues during the product lifecycle.
The fundamental challenge lies in integrating permanent decoration that maintains structural integrity throughout the product lifecycle while preserving the recyclability of the base material.
This page brings together solutions from recent research—including exhaust channel designs for bubble reduction, synthetic resin film labels made from matching container materials, and surface modification techniques for embedded graphics. These and other approaches focus on achieving durable decoration while maintaining the circular economy benefits of mono-material packaging systems.
1. Contactless RFID Label with Dual-Substrate Structure for Heat-Shrinkable Attachment
DAI NIPPON PRINTING CO LTD, Dai Nippon Printing Co., Ltd., 2024
Contactless RFID label for packaging articles that provides efficient, waste-free production with good appearance and communication characteristics compared to conventional RFID labels. The label has a packaging body that covers part of an article and contains an antenna, wiring, and IC chip. The label is made by stacking two substrates of the same material with different shrinkage rates. This prevents separation during heat shrinking. The label is fixed to the article by heating to shrink it. The label can have an overlapping antenna and wiring section. This allows compact packaging without deformation. The label is produced by stacking, forming, and connecting components before heat shrinking and attaching.
2. Blow Mold with Exhaust Channels and Ventilation Grooves for Enhanced Air Evacuation
TECHNICAL RESPONSE INC, 2024
Blow mold for plastic bottles that reduces air bubbles between the bottle and label during molding to improve adhesion and prevent delamination. The mold has exhaust channels on both sides to increase vent volume and connects to a vacuum suction assembly. This allows active exhaust during molding to remove internal air and bubbles. Additionally, the mold has ventilation grooves with auxiliary channels to balance pressure.
3. Container with Integral Synthetic Resin Film Label and Detachable Lid
HONGSEONGKOAN, Hong Seong-gwan, HONG SUNG KWAN, 2024
A container that eliminates the need to separate the label during recycling by making the label from the same material as the container body. The container has a label made of a synthetic resin film like PET that adheres to the outer surface of the container body using the same resin. This allows the label and container to be discharged together without removing the label separately. The container can have a detachable lid. The shared resin between the label and body ensures they stay attached during recycling.
4. Method and Tool for Heat-Sealable Label Transfer on Biodegradable Packaging with Rotating Mandrels
MACHINES PAGES, 2024
A method and tool for labeling biodegradable packaging with rough surfaces like paper pulp. The method involves transferring a heat-sealable label onto the conical or frustoconical periphery of a molded biodegradable package without adhesive. The label is placed upside down on a rotating mandrel, brought into contact with the package, and rotated to transfer the label. The label is then indexed and punctually secured to the package. Heat sealing is done by contacting the labeled package with a hot mandrel. The tool has rotating label and packaging mandrels, label indexing/securing, and hot mandrel sealing.
5. Biodegradable Food Tray with Transparent Adhesive Label for Viewing Opening
SORTING, 2024
Packaging for perishable foods that allows viewing without using plastic films. The packaging is a cardboard or biodegradable tray with an opening covered by a transparent label. The label has an adhesive part to stick to the tray edges and a non-adhesive part to cover the opening. This prevents the food from coming out while letting it be seen. The label is made of biodegradable film. The packaging reduces plastic usage compared to plastic trays with films. The label shape matches the tray opening. A mold presses the label adhesive part while avoiding the non-adhesive part. This allows manual packaging.
6. Interface Device for Modifying Film Image and Extracting Feature Coordinates for Packaging Machine Processing
SYNTEGON PACKAGING SOLUTIONS BV, SYNTEGON PACKAGING SOLUTIONS B V, 2024
Operating a packaging machine to process film material for packing products by allowing users to modify an image of the film and convert those modifications into processing instructions for the machine. The interface device displays the film image and lets users add features like labels, holes, and printing. It extracts coordinates for the added features relative to a known spot on the film. The machine then uses these coordinates to accurately reproduce the features during packing. This allows precise placement of added features without relying solely on machine sensors.
7. Packaging Bottles with Embedded Text via Surface Modification Techniques
Hydro Hygienic Co., Ltd., HYDRO HYGIENIC COMPANY LTD, 2024
Packaging bottles with embedded letters to provide product details directly on the bottle instead of labels that can't be recycled. The letters are created using embossing, carving, laser, sandblasting, or corrosion techniques to form raised, indented, or etched letters on the bottle surface. This allows product information like ingredients, allergens, and warnings to be permanently molded into the packaging instead of added as separate labels. The embedded letters can be read easily and remain intact when the bottle is recycled.
8. Plastic Packaging with Integrated Scratch-Off Prize Feature Using Layered Inks
PT PURA BARUTAMA, 2023
Promoting products with plastic packaging using a scratch-off prize model without adding paper. The method involves integrating the scratch-off component directly into the plastic packaging itself, using special inks or layered chemicals to create color-changing images that reveal prizes when scratched. This eliminates the need for separate scratch-off stickers or coupons that would add cost and complexity when using non-paper packaging materials like plastic bottles and labels. The scratch-off prizes can be placed on the secondary or tertiary packaging rather than the primary product packaging.
9. Rigid Plastic Container with Laser-Encoded Microcodes on Outer Surface via Deep Drawing Process
PACCOR PACKAGING GMBH, 2023
Encoding packaging containers made of rigid plastics like HDPE, PE, PET, and PP for food storage. The encoding is done during the container production process by deep drawing the initial flat plastic sheet into the container shape. Laser treatment on the tool mold inserts creates tiny codes on the inner surfaces that imprint as codes on the container's outer surface during deep drawing. The codes are invisible to the naked eye but can be scanned to read product info, enable recycling tracking, prevent fraud, etc.
10. Packaging Containers with Mold-Embedded Digital Watermarks via Microscopic Surface Modulation
PACCOR PACKAGING GMBH, 2023
Coding packaging containers made of dimensionally stable plastic for storing consumer goods like food by embedding digital watermarks during the manufacturing process. The watermarks are created by forming elevations and depressions on the inner surfaces of the mold used for deep drawing the plastic into the container shape. These subtle microscopic features are too small to be seen but can be read using a specialized scanner. By embedding the watermarks during production, the containers themselves become a permanent and tamper-proof form of coding.
11. Labeling Mechanism with Adjustable Wheel Set for In-Situ Label Application During Packaging Sealing
Fenghua Food Machinery Co., Ltd., FOODMAX MACHINERY CO LTD, 2023
A labeling mechanism for sealing packaging machines that allows on-the-spot labeling during sealing without additional printing equipment. The mechanism uses an adjustable wheel set to move a label sticker into position as the packaging film seals. The wheels can be adjusted to precisely align the label with the sealed packaging. This enables printing the label directly onto the sealing film as it forms, eliminating the need for separate labeling machines. The adjustment wheel set has a fixed wheel, movable wheel, connecting rods, adjustment plate, and hand wheel to move the label into position.
12. Method for Assigning and Querying Unique Codes for Material Identification in Packaging
PACCOR PACKAGING GMBH, 2023
Method for tracking and identifying recyclable materials in packaging through a unique code assigned during production. The method involves associating a code with each container during production, storing an entry in a database containing the packaging materials used, and reading the code to query the database entry during recycling. This allows identifying the specific materials in a mixed recycling stream. The entry can also contain additional data like product details, production dates, etc.
13. Container Packaging with Rigid Frame Fused to Flexible Film or Cap
NYPRO INC, 2023
Fusion packaging for containers like pouches, bags, and bottles that has a rigid frame fused to a flexible film or cap. The frame provides structure and the flexible component seals the container. The fusion bonding process joins the rigid and flexible parts after filling the container. This allows stackability, recyclability, and improved product protection compared to traditional standalone flexible packages. The fusion can be achieved through methods like injection molding, in-mold labeling, heat welding, adhesives, or staking.
14. Modular Block Configuration Device with Clamping Transfer Stars for Direct Bottle Transfer and Interchangeable Labeling Units
KRONES AG, 2023
Compact, flexible device for manufacturing, labeling, and filling plastic bottles with direct transfer between machines using clamping transfer stars. The devices are connected in a block configuration to minimize conveyor belt length. The stars grip the bottles positively between machines. This allows immediate transfer after blow molding without intermediate steps. The star wheels can also have inspection modules. The machines are modular with interchangeable labeling units. The enclosed housings allow separate atmospheres for each machine.
15. Manufacturing Process for Integrating RFID Tags into Caps Using Injection Molding with Aligned Hole Assembly and Axial Channel Filling
LES BOUCHAGES DELAGE, 2023
A simplified manufacturing process for caps with RFID tags that can integrate the tag without damaging it and ensure proper operation in a metallic environment. The process involves assembling the RFID tag onto the ballast with aligned holes, then injecting molding around the assembly to enclose it. This allows the RFID tag to be placed in the head cavity and coated with plastic during molding without needing separate steps for RFID insertion. The molding material fills the axial channel between the tag and ballast. This prevents damage to the RFID during injection and ensures it doesn't short circuit against metal components. By selecting an initial RFID frequency based on the ballast and head materials, the final frequency after molding is close to the target.
16. Bottle Container with Integrated Structural Color Decoration Formed by Fine Concave-Convex Patterns on Translucent Resin Surface
OTSUKA TECHNO CORP, Otsuka Techno Co., Ltd., 2022
Bottle container with integrated decoration that improves design freedom, recyclability, and visibility compared to separate decorative parts. The container body is made of translucent resin and has a structural color decoration formed directly on the outer surface using fine concave-convex patterns. This allows the decoration to be an integral part of the container and not require separation during recycling. It also increases design freedom since the decoration can be placed anywhere on the container and does not need to be wrapped around it. The container body material can be the same as the container body resin for simplicity. The decoration visibility is enhanced by using a contrasting resin for the decoration compared to the body.
17. Bottle Structure with Circumferential Grooves and Arcuate Bulging Sections
YOSHINO INDUSTRY CO LTD, YOSHINO KOGYOSHO CO LTD, Yoshino Gypsum Co., Ltd., 2022
Bottle design with grooves to reduce weight and improve rigidity and appearance. The bottle has first radial grooves extending along the circumference in the barrel. Between the first grooves, it has shallower, narrower second radial grooves. This provides rigidity to prevent barrel deformation. The narrower, shallower second grooves reduce label denting and improve appearance. The barrel can also have bulging sections between adjacent first grooves. This supports the label from the inside to prevent label recessing. The bulging sections are arcuate and continuous in the axial direction. This improves moldability and suppresses air pockets.
18. PET Bottle with In-Mold Label Incorporating Inert Layer for Controlled Adhesion
YUPO CORP, Yupo Corporation, YUPO CORPORATION CO LTD, 2022
A PET bottle with an in-mold label that provides good adhesion and easy recyclability. The label has a support layer made of PET, an adhesive layer between the support and the bottle, and an inert layer between the adhesive and the bottle. The inert layer has an area ratio of 20-90% of the adhesive layer's surface area. This prevents excessive adhesion between the label and the bottle during molding, making it easier to peel off for recycling. The adhesive melts during molding to activate adhesion, but the inert layer prevents over-adhesion.
19. Transport Container with Integrated Offset Embossed Label Formed by Back-Injected Molding
OBERLAND M & V GMBH, 2022
Transport container for holding drinks bottles with an embossed label that is offset into the container wall. The label is inserted before molding and back-injected with the plastic. This creates a label area that protrudes into the container wall surface. The embossed label structure provides visual interest and protects against rubbing surfaces. The label can have embossed text and patterns that are raised above the container surface. This provides a distinct and memorable appearance compared to flat labels.
20. Extrusion Blow-Molded Bottle with In-Mold Applied Label
YOSHINO KOGYOSHO CO LTD, YOSHINO INDUSTRY CO LTD, Yoshino Kogyosho Co., Ltd., 2022
Extrusion blow-molded bottle having a label applied to its surface by in-mold molding. The bottle has a container body formed into a bottle shape by extrusion blow molding and in-mold molding.
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