Multi-Film Thermoplastic Bag Text Without Ink Printing

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Solution Overview

Problem

Thermoplastic bags face issues with ink-based suffocation warnings lacking density, contrast, and permanence, leading to reduced legibility and increased production costs, while thinner gauge films compromise durability and customer perception of quality.

Innovation Solution

Create multi-film thermoplastic structures with visually-distinct contact areas between adjacent films, forming text that provides enhanced legibility and tactile cues of strength without ink, using heat and pressure to bond films with controlled properties.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Loss of information

If ink-based printing is used for suffocation warnings on thermoplastic bags, then text can be applied to the bag surface, but the text lacks density, contrast, and permanence, reducing legibility

Engineering Contradiction:

Improvetext legibilityVSAvoidink permanence

Core Design Contradiction:

Loss of informationVSReliability

Solution Approach 1:

The patent replaces the chemical ink printing system with a mechanical embossing system that creates tactile and visual text features directly on the thermoplastic bag surface through heat and pressure application, eliminating ink adhesion problems while enhancing text permanence and legibility

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent creates visual contrast by embossing text that changes appearance under different lighting conditions or viewing angles, utilizing the physical properties of the embossed structure itself to provide density and contrast without relying on ink coloration

Inventive Principle:

Principle #32Color changes

2Reliability

If surface treating is applied to thermoplastic films to improve ink adhesion, then ink printing may be enhanced, but the text still lacks density, contrast, and permanence

Engineering Contradiction:

Improveink adhesionVSAvoidtext density and contrast

Core Design Contradiction:

ReliabilityVSLoss of information

Solution Approach 1:

The patent eliminates the need for surface treating by replacing ink-based chemical printing with mechanical embossing, where text is created through direct physical deformation of the thermoplastic material using heat and pressure, making adhesion enhancement unnecessary while achieving superior text quality

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Solution Approach 2:

The patent extracts and removes the ink printing step entirely from the manufacturing process, relying solely on mechanical embossing to create permanent, high-contrast text features directly on the bag surface

Inventive Principle:

Principle #2Taking out (Extraction)

3Loss of information

If ink-based printing equipment and surface treating equipment are used, then text can be applied to thermoplastic bags, but production efficiency decreases and costs increase

Engineering Contradiction:

Improvetext application capabilityVSAvoidbag production efficiency

Core Design Contradiction:

Loss of informationVSProductivity

Solution Approach 1:

The patent combines the text application function with the existing heat sealing process by integrating embossing rollers into the sealing mechanism, allowing text to be created during the normal bag sealing operation without requiring separate printing or treating steps

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The patent removes expensive ink-based printing equipment and surface treating equipment from the production line, replacing them with a mechanical embossing system that can be integrated into existing machinery, thereby reducing capital costs and maintenance requirements

Inventive Principle:

Principle #2Taking out (Extraction)

4Quantity of substance

If thinner gauge thermoplastic films are used to reduce material costs, then production costs decrease, but film durability and customer perception of quality are reduced

Engineering Contradiction:

Improvethermoplastic material amountVSAvoidfilm durability

Core Design Contradiction:

Quantity of substanceVSStrength

Solution Approach 1:

The patent applies localized embossing to create raised text features and grab zones at specific locations on the bag, concentrating structural reinforcement and tactile feedback where needed while maintaining thinner overall film gauge, thus preserving durability at critical points without increasing overall material usage

Inventive Principle:

Principle #3Local quality

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 contact areas enhance text legibility and durability, reducing production costs by eliminating ink-based printing equipment and providing a stronger, more rigid feel, thus improving customer perception of quality.

Implementation Method 1

using heat and pressure to bond films with controlled properties

Methodology Applied

Scientific EffectHeat and pressure bonding:

Data Source

PatentUS12600543B2Multi-film thermoplastic bags having visually-distinct contact areas creating text

Publication Date: 2026.04.14 GLAD PRODUCTS CO

AI summary

One or more implementations of a multi-film thermoplastic structure include a first film having a first appearance in contact with a second film having a second appearance at one or more visually-distinct contact areas arranged into a text. Wherein the one or more visually-distinct contact areas, cause the first film to take on the second appearance of the second film. In one or more implementations the multi-film thermoplastic structure comprises a thermoplastic bag and text comprises a suffocation warning.