• Opening the door to manufacturing efficiency

    Opening the door to manufacturing efficiency story banner
    FACC reduces rework during storage bin door manufacture with the help of core splice film from 3M.

    Overhead storage bins are essential to quality passenger experiences. However, bin door manufacture can become labor intensive due to extensive rework during core splicing and edge filling. Core splice film from 3M can streamline the process with reliable expansion, easy shop handling and a long shop life. It has helped FACC significantly reduce rework during bin door manufacture.

    • Technician peeling liner from structural core splice film; structural core splice film applied.

      The importance of overhead storage bins

      Overhead storage bins are the first point of contact between passengers and the aircraft. Before taking their seats, using the lavatory or enjoying in-flight entertainment, passengers must stow their luggage. Spacious bins that enable easy stowage and quick retrieval are essential to facilitate boarding and deplaning and improve overall passenger experience.

      To this end, aircraft OEMs and Tiers are constantly innovating new overhead storage bins that balance higher capacities with reduced weight and enhanced aesthetics. Bins are replaced every six years on average, and a mid-life aircraft undergoing cabin refurbishment will almost certainly have its bins upgraded. That plus an anticipated rise in new aircraft deliveries to well beyond pre-COVID-19 levels means that substantial growth in the overhead storage bin market is expected in the next five years.

    • Overhead storage bin door manufacture

      Of all aspects of overhead storage bin production, doors pose notable manufacturing challenges. They feature complex, 3-D curvatures that make honeycomb core splicing, reinforcement and edge filling exceptionally difficult. Considerable rework is typically required to eliminate wrinkles inside and around the edges and achieve strong, aesthetically pleasing parts.

    • Advanced core splice film helps minimize rework

      Core splice film from 3M is engineered to help interior part producers expedite the splicing and filling process and streamline overhead storage bin door manufacture. 3M™ Scotch-Weld™ Core Splice Adhesive Film AF 3074 FST is a low-density, thermally expanding epoxy adhesive film with excellent mechanical and FST (Fire, Smoke and Toxicity) properties. It enables easy, reliable shop handling while minimizing rework in honeycomb core splicing, reinforcement and edge filling in aircraft part fabrication.

      With a high and repeatable expansion rate of up to 230% across cure profiles, Scotch-Weld AF 3074 FST more than triples its volume during cure. It is easy to handle and cut and balances good tack with easy repositioning during application. With a wide in-service temperature range of −55 °C to 135 °C, it is co-curable with structural adhesive films and prepregs in cure cycles of 120–180 °C (250–350 °F). The low density of the cured film (0.4 g/cm3 at free expansion) can also help reduce weight per part.

      Scotch-Weld AF 3074 FST enables non-refrigerated transport and room-temperature storage. Its long shop life enables up to 30 days of storage outside the protective bag. If sealed inside the protective bag, it can be stored for up to 6 months.

    • Core splice film joining mismatched honeycomb structures

      FACC optimizes manufacturing efficiency

      By switching to Scotch-Weld AF 3074 FST for core splicing and edge filling of Airbus A320 overhead storage bin doors, FACC noted multiple process improvements. Compared to their previous core splice solution, engineers at FACC were able to:

      • Significantly reduce rework rates on bin doors
      • Minimize product waste with a 50% longer shop life
      • Reduce core splicing material weight by approximately 46%

      Core splice film from 3M enabled FACC to dramatically enhance production efficiency and cost-effectiveness while also reducing component weight.

    • Qualification and Compliance

      Scotch-Weld AF 3074 FST is being evaluated for qualification to major aircraft OEM specifications. It is flame retardant and has met the following requirements:

      • FAR/JAR/CS 25.853 (a) App F, Part I (a) (1) (ii)
      • FAR/JAR/CS 25.853 (d) App F, Part V (b)
      • Airbus ABD0031


    • Authorization to use

      Ensure products meet all applicable specifications, standards, and maintenance manual requirements for the platform being worked on and validate all aircraft approvals against current technical documentation.


    • About FACC

      FACC is a worldwide leading aerospace company in design, development and production of aerospace technologies and advanced aircraft lightweight systems. Being the technology partner of all major manufacturers, FACC works together with its customers on developing solutions for the mobility of the future. Every second, there is an aircraft taking off with FACC technology on board.