Polymeric wrapping material

Solution Overview

Problem

Conventional polymeric wrapping materials for lumber suffer from significant discoloration due to UV exposure and material transfer issues, requiring costly remedies like sanding and cleaning.

Innovation Solution

A polymeric wrapping material featuring a woven scrim with a UV-blocking layer, a marking layer, and a cover layer, where the UV-blocking layer is sandwiched between the polymeric sheet and the cover layer, and all coatings are applied simultaneously to minimize material transfer and discoloration.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Object-affected harmful factors

If a black UV-blocking coating is applied to the inner face of the wrapping material, then UV light passage is limited and lumber discoloration is prevented, but material transfer to the lumber becomes problematic and visually noticeable

Engineering Contradiction:

ImproveUV light passageVSAvoidmaterial transfer

Core Design Contradiction:

Object-affected harmful factorsVSObject-generated harmful factors

Solution Approach 1:

The patent divides the inner face coating into two separate functional layers: a black UV-blocking layer that absorbs UV radiation and a beige cover layer that prevents material transfer. This segmentation allows each layer to perform its specific function without the drawbacks of combining both properties in a single layer.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The beige cover layer is applied over the black UV-blocking layer, creating a nested structure where the UV-blocking layer is sandwiched between the polymeric sheet and the cover layer. This nested arrangement allows the black layer to block UV light while the outer beige layer prevents material transfer to the lumber.

Inventive Principle:

Principle #7Nested doll (Nesting)

2Object-generated harmful factors

If a beige cover layer is applied to the inner face of the wrapping material, then material transfer to the lumber is reduced, but UV light passage is not blocked and lumber discoloration occurs

Engineering Contradiction:

Improvematerial transferVSAvoidUV light passage

Core Design Contradiction:

Object-generated harmful factorsVSObject-affected harmful factors

Solution Approach 1:

The patent divides the inner face coating into two separate functional layers: a black UV-blocking layer that absorbs UV radiation and a beige cover layer that prevents material transfer. This segmentation allows each layer to perform its specific function without the drawbacks of combining both properties in a single layer.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The beige cover layer is applied over the black UV-blocking layer, creating a nested structure where the UV-blocking layer is sandwiched between the polymeric sheet and the cover layer. This nested arrangement allows the black layer to block UV light while the outer beige layer prevents material transfer to the lumber.

Inventive Principle:

Principle #7Nested doll (Nesting)

3Reliability

If multiple coatings are applied sequentially to the polymeric sheet, then each coating can be optimized for its specific function, but manufacturing complexity and production time increase

Engineering Contradiction:

Improvecoating functionalityVSAvoidmanufacturing efficiency

Core Design Contradiction:

ReliabilityVSProductivity

Solution Approach 1:

The patent combines the application of the black UV-blocking coating and the beige cover coating into a single co-extrusion process. This merging of operations allows both coatings to be applied simultaneously in one manufacturing pass, maintaining the functional benefits of multiple optimized coatings while eliminating the time and complexity penalties of sequential application.

Inventive Principle:

Principle #5Merging (Combining)

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 effectively prevents UV-induced discoloration and reduces material transfer, eliminating the need for costly remediation processes like sanding and cleaning, while enhancing manufacturing efficiency through co-extrusion.

Implementation Method 1

The coating 140 has a black color that is effective at limiting passage of UV light through the wrapping material 200

Methodology Applied

Scientific EffectUV light blocking: Absorption (EM radiation)

Data Source

PatentUS20230193529A1Polymeric wrapping material

Publication Date: 2023.06.22 OWENS CORNING INTELLECTUAL CAPITAL LLC

AI summary

A wrapping material having three distinct polymeric layers interfaced with a woven polymeric scrim is disclosed. A first polymeric layer is formed by extruding a first polymeric coating onto the scrim. A second polymeric layer and a third polymeric layer are simultaneously formed by co-extruding a second polymeric coating onto the scrim and a third polymeric coating onto the second polymeric coating.