Laminated Glazing Lacquer Adhesion PVB Interlayer

Solution Overview

Problem

Existing decorative glazings, such as lacquered and laminated glasses, fail to meet safety and durability standards for use as partitions or doors due to issues with adhesion, shock resistance, and complex manufacturing processes.

Innovation Solution

A laminated glazing solution involving sheets of glass with a layer of lacquer on one sheet and a PVB polymer interlayer sheet between the glass sheets, which enhances adhesion, shock resistance, and durability while maintaining aesthetic appeal.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Shape

If lacquer is deposited on glass sheets for decorative purposes, then aesthetic appearance is improved, but safety and durability are worsened due to poor adhesion and scratchability

Engineering Contradiction:

Core Design Contradiction:

ShapeVSReliability

Solution Approach 1:

The patent creates a composite structure by depositing lacquer layers on glass sheets and then laminating them with PVB polymer interlayers. This composite construction combines the aesthetic properties of lacquer with the safety and durability properties of laminated glass, resolving the contradiction between appearance and reliability

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The PVB polymer interlayer acts as an intermediary between the lacquer-coated glass sheets, providing strong adhesion and mechanical bonding. This intermediary layer transfers and distributes stresses, preventing direct stress concentration on the lacquer layer while maintaining aesthetic appearance

Inventive Principle:

Principle #24Intermediary (Mediator)

2Shape

If decorative films are used to cover glass partitions, then aesthetic appearance is improved, but durability and implementation difficulty are worsened

Engineering Contradiction:

Core Design Contradiction:

ShapeVSEase of manufacture

Solution Approach 1:

The lacquer is deposited on the glass sheets before lamination, creating a permanent decorative layer that is integrated into the glass structure. This preliminary action eliminates the need for separate film application steps, reducing implementation difficulty while maintaining aesthetic appearance

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent merges the decorative function (lacquer deposition) with the structural function (glass lamination) into a single integrated process. The lacquer layer becomes an inherent part of the laminated glass structure, eliminating separate film application steps and improving ease of manufacture

Inventive Principle:

Principle #5Merging (Combining)

3Strength

If multiple glass sheets and polymer interlayers are used to improve safety, then shock resistance is improved, but manufacturing complexity increases

Engineering Contradiction:

Core Design Contradiction:

StrengthVSDevice complexity

Solution Approach 1:

The PVB polymer interlayer serves multiple functions simultaneously: it provides shock resistance, bonds the glass sheets together, and accommodates the lacquer decorative layers. This multi-functionality reduces manufacturing complexity by eliminating the need for separate components for each function

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Reliability

If lacquer layers are included within the laminated glazing structure, then durability and safety are improved, but manufacturing precision requirements increase

Engineering Contradiction:

Core Design Contradiction:

ReliabilityVSManufacturing precision

Solution Approach 1:

The patent specifies optimized parameter ranges for lacquer deposition (thickness: 10-100 μm, mineral species content: 40-70% by weight) that ensure both durability and manufacturability. These parameter changes make the process robust and less sensitive to minor variations, reducing manufacturing precision requirements while maintaining reliability

Inventive Principle:

Principle #35Parameter changes

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

The solution meets safety standards for shock and impact resistance, classified as 2B2 according to EN 12600 and EN 14449, making it suitable for use as partitions, while also addressing aesthetic and durability concerns.

Implementation Method 1

a polymer interlayer sheet in contact with said layer of lacquer and ensuring the connection between said first sheet of glass and a second sheet of glass

Methodology Applied

Scientific EffectAdhesion: Adhesive

Implementation Method 2

PVB also makes it possible to absorb shocks very effectively and to retain glass fragments in the event of glass breakage

Methodology Applied

Scientific EffectShock absorption: Damping

Implementation Method 3

A lacquer is a non-transparent coating, which can be translucent, but which is generally opaque, and which comprises at least one polymeric resin, at least one pigment, and generally mineral fillers

Methodology Applied

Scientific EffectOpacity: Absorption (EM radiation)

Data Source

PatentEP2227399B1Laminated glazing and a method for obtaining it

Publication Date: 2021.04.28

Figure 1~2
Figure 3

AI summary

The subject of the invention is laminated glazing comprising at least two glass sheets (1, 4) and at least one polymeric interlayer (2) made of polyvinyl butyral and binding said glass sheets together. The glazing is characterized in that at least one lacquer layer (3) is placed between the at least two glass sheets (1, 4).