Packaging bag and sheet package

Solution Overview

Problem

Paper packaging bags are difficult to open due to their lack of flexibility compared to resin packaging bags, making it hard to tear the perforations effectively.

Innovation Solution

A paper packaging bag with a base material containing a paper component and an inner layer of thermoplastic resin with a slip agent, which reduces the static friction coefficient between the bag and the sheets, allowing easier tearing of perforations.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If paper material is used for packaging bags to reduce environmental impact, then environmental friendliness is improved, but flexibility and ease of opening deteriorate

Engineering Contradiction:

Improveenvironmental impactVSAvoidease of opening

Core Design Contradiction:

Object-affected harmful factorsVSEase of operation

Solution Approach 1:

The packaging bag uses a composite structure with a paper-based base layer providing environmental friendliness, and a thermoplastic resin inner layer providing flexibility and ease of opening. This composite material approach allows the package to combine the environmental benefits of paper with the operational advantages of plastic, resolving the contradiction between eco-friendliness and ease of opening.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The thermoplastic resin inner layer is applied locally to the interior surface of the paper packaging bag, specifically where flexibility and tearability are needed. This localized application provides the necessary operational properties without compromising the overall paper-based environmental friendliness of the packaging structure.

Inventive Principle:

Principle #3Local quality

2Object-affected harmful factors

If paper material is used for packaging bags, then environmental friendliness is improved, but flexibility deteriorates

Engineering Contradiction:

Improveenvironmental impactVSAvoidflexibility

Core Design Contradiction:

Object-affected harmful factorsVSStability of the object's composition

Solution Approach 1:

The packaging bag uses a composite structure with a paper-based base layer providing environmental friendliness, and a thermoplastic resin inner layer providing flexibility and ease of opening. This composite material approach allows the package to combine the environmental benefits of paper with the operational advantages of plastic, resolving the contradiction between eco-friendliness and ease of opening.

Inventive Principle:

Principle #40Composite materials

3Ease of operation

If perforations are provided in paper packaging bags to aid opening, then ease of opening is improved, but the perforations cannot be torn easily due to paper rigidity

Engineering Contradiction:

Improveease of openingVSAvoidtear strength

Core Design Contradiction:

Ease of operationVSStrength

Solution Approach 1:

The packaging bag uses a composite structure with a paper-based base layer providing environmental friendliness, and a thermoplastic resin inner layer providing flexibility and ease of opening. This composite material approach allows the package to combine the environmental benefits of paper with the operational advantages of plastic, resolving the contradiction between eco-friendliness and ease of opening.

Inventive Principle:

Principle #40Composite materials

Solution Approach 2:

The thermoplastic resin inner layer changes the physical parameters of the packaging bag surface, specifically reducing the static friction coefficient between the bag and sheets. This parameter change allows perforations to be torn more easily by reducing resistance during the tearing process, while maintaining the paper-based environmental friendliness.

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 enables paper packaging bags to be opened easily by reducing the friction between the bag and the sheets, improving the ease of opening without compromising the bag's integrity during manufacturing and transport.

Implementation Method 1

the thermoplastic resin contains a slip agent

Methodology Applied

Scientific EffectFriction: Friction

Data Source

PatentUS20240043193A1Packaging bag and sheet package

Publication Date: 2024.02.08 DAIO PAPER CORP

AI summary

A packaging bag for storing sheets includes a base material that contains a paper component. The base material includes a base layer that contains the paper component, and an inner layer that is layered on one surface of the base layer and is provided on an interior of the packaging bag. The inner layer contains a thermoplastic resin. The thermoplastic resin contains a slip agent.