Method for Joining Even Adhesion-Incompatible Plastic Parts to One Another and Composite Component Comprising Even Adhesion-Incompatible Plastic Parts

Simple SummaryContent extracted from patent full text and abstract with AI.

This invention describes a method for joining together plastic parts that are otherwise incompatible for adhesion. The process involves roughening the surface of one plastic part on a microscopic level to create microstructures, then pressing the other plastic part against it under heat and pressure. The second part melts slightly and flows into these microstructures, solidifying as it cools to create a strong mechanical interlock, even between plastics that can't chemically bond.

Use CasesContent extracted from patent full text and abstract with AI.

• Assembly of multi-material plastic components in the automotive industry
• Production of consumer electronics using different types of plastics
• Medical devices where different plastics must be joined securely
• Packaging solutions that require combining plastics with different properties
• Recyclable or easily separable composite materials

BenefitsContent extracted from patent full text and abstract with AI.

• Enables strong joining of plastics that cannot be bonded by adhesives or welding
• Provides a mechanically robust and reliable connection
• Does not require additional connecting elements like screws or rivets
• Allows new design possibilities through combining previously incompatible materials
• Process is compatible with recycling, enabling easy separation of components after use

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Inventors & Applicants

Patent Abstract

A composite component (11) comprising even bonding-incompatible plastic parts is joined in an interlocking manner by a bonding surface (14.1) on one of the parts to be bonded (12.1) having been roughened to create microstructures (15), and by the bonding surface (14.2) on the other, second part to be bonded (12.2) having been pressed against the microstructures (15) in the first bonding surface (14.1) until at least some of the microstructures (15) are plastically deformed, being compressed to create undercuts. The contact of the bonding surfaces (14.1-14.2) against one another was retained until material (16) from the second bonding surface (14.2) that melts as a result of the increase in temperature flowed between the deformed microstructures (15), in order then to solidify there as a result of cooling down to provide the mechanically very stable micro-interlocked joining of the composite component (11).