Composite Film Transfer Coating Plastic Parts
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Current manufacturing processes for plastic components require additional steps and resources for coating, such as in-mold painting or post-processing, which complicate and lengthen the production time and increase costs, while existing solutions for integrated coating methods face issues with adhesion, extensibility, and surface quality.
Innovation Solution
A composite film comprising a plastic carrier film, a cured coating material with an elongation at break between 5% and 800% at 23 °C, and an organosilicon layer with lower adhesion strength to the coating material than to the carrier film, allowing for seamless transfer and integration of the coating material into the manufacturing process without additional machinery or safety measures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If in-mold coating or post-painting is used, then coating can be applied to plastic components, but the manufacturing process becomes longer and more complicated with increased costs
Solution Approach 1:
The patent combines the coating material and release layer into a single integrated film that is applied during the molding process itself. This merging of coating application and molding operations eliminates separate post-painting steps, directly resolving the contradiction between achieving reliable coating and maintaining manufacturing efficiency.
Solution Approach 2:
The coating material is applied to a carrier film in advance, creating a pre-coated film that is then transferred to the molded part. This preliminary preparation of the coating on the carrier film allows the coating to be ready for transfer during molding, eliminating the need for separate coating operations and improving productivity.
2Strength
If plasma-polymer release layer is used on carrier film, then adhesion to paint layer is improved, but the painted component becomes difficult to paint or bond for subsequent paint build-up
Solution Approach 1:
The patent uses a specifically designed release layer that acts as an intermediary with controlled adhesion properties. This release layer provides sufficient adhesion during the transfer process to prevent coating detachment, but allows clean separation afterward to maintain subsequent painting capability, thus resolving the contradiction between adhesion strength and future adaptability.
3Ease of manufacture
If coating material is applied directly to mold surface, then in-mold coating is achieved, but additional machinery and safety measures are required
Solution Approach 1:
The patent extracts the coating material from the mold cavity environment and applies it on a carrier film outside the mold. This extraction eliminates the need for specialized in-mold coating machinery and safety measures for solvent handling, while still achieving integrated coating through the transfer process.
4Strength
If coating material has low elongation at break, then adhesion strength is maintained, but the coating cracks or flakes off when drawn into molds
Solution Approach 1:
The patent creates a composite structure with a carrier film and coating material having complementary properties. The carrier film provides the necessary elongation and flexibility for forming, while the coating material maintains adhesion strength. This composite approach resolves the contradiction between adhesion and formability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables a one-shot coating process directly on plastic components during manufacturing, reducing production time and costs by eliminating the need for post-processing steps, ensuring high surface quality, and allowing for complex shape adaptation without cracking or delamination.
Implementation Method 1
the adhesive strength between the organosilicon layer and the coating material after curing is less than the adhesive strength between the organosilicon layer and the carrier film
Implementation Method 2
a cured coating material, wherein the adhesive strength between the organosilicon layer and the coating material after curing
Data Source
AI summary
The invention relates to a composite film for coating material transfer, comprising a backing film made of plastic, a hardened coating material, and an organic silicon layer, which is arranged between the backing film and the coating material. The invention further relates to the use of a composite film according to the invention for transfer of a coating material onto a plastic part and to a method for producing a composite film according to the invention. The invention further relates to a method for producing a coated plastic component using the composite film according to the invention.