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Packaging to improve shelflife of insulation products

Inactive Publication Date: 2013-03-21
OWENS CORNING INTELLECTUAL CAPITAL LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The invention provides a method to prevent degradation of a fibrous insulation product that has a cured binder. The method involves storing the product in a package that has a low permeance (not more than 0.9 g / hr-ft2-in Hg. This results in a reduced loss of performance of the insulation product.

Problems solved by technology

It has been found that certain physical properties of fibrous insulation products may deteriorate over aging or storage time.
This is particularly true of products stored under conditions of high heat and humidity, and has been found to be a problem for phenolic or formaldehyde based binders as well as bio-based binders.

Method used

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  • Packaging to improve shelflife of insulation products
  • Packaging to improve shelflife of insulation products
  • Packaging to improve shelflife of insulation products

Examples

Experimental program
Comparison scheme
Effect test

examples 1-14

[0073]Examples 1 to 14 herein are incorporated from Examples 1-14, including tables 4-33 that appear in U.S. patent application Ser. No. 13 / 037,725 titled “INSULATIVE PRODUCTS HAVING BIO-BASED BINDERS” filed Mar. 1, 2011, already incorporated herein.

example 15

[0074]Various packaging materials are obtained having the physical properties listed in Table 34.

TABLE 34Representative Packaging Material PropertiesSample 1Sample 2Sample 3Sample 4(Bag)(Bag)(DSW film)(DSW film)nominal2.02.01.51.5thickness (mils)No. of layers1132compositionLDPELDPE / PPLDPEPEcopolymerpermeance0.250.30.150.3g*in / hr*ft2*in Hgelasticity (%)700%800%600%550%tensile / elongation4500500070007500(psi)tear (g / mil)875900600575Coeff. of Friction0.350.41.52.0haze (%) 14% 16% 6% 7%

example 16

[0075]Flexible duct media (FDM) is a type of fibrous insulation that is often used around flexible conduit or tubing. It is generally available in rolls designated with R values 4.2, 6 or 8 and having nominal thickness of 1.25, 2, and 2.25 inches, respectively. FDM was produced with a bio-based binder according to the invention in R6 thicknesses (nominally 2 inches) and placed in various types of packaging for testing. The comparison points were the recoveries achieved after storage at ambient conditions for 7 days (“ambient x7d”). The experimental conditions tested include accelerated temperature and humidity tests as well as variations in time (x21 days vs. x7 days). For example, the condition labeled “73 / 92” indicates a temperature of 73F and relative humidity (RH) of 92%; and the condition labeled “73 / 92-92 / 50” indicates a cycled temperature and humidity profile simulating day and night in a humid area of the country; i.e. 73F with 92% RH by night and 92F with 50% RH by day. Pro...

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Abstract

Fibrous insulation products have a binder composition that may include a carbohydrate and a crosslinking agent, and potentially other optional ingredients. The shelf life and physical properties of fibrous insulation products, particularly those having bio-based binders, can be improved by packaging that completely envelopes and seals the fibrous product from exposure to atmospheric conditions. Exemplary envelopes disclosed include sealed bags, double stretch wrap and stretch hoods. Properties that can be improved include recovery of loft, restoring force and tensile strength among others.

Description

CROSS REFERENCE TO RELATED APPLICATIONS[0001]This application is related to U.S. patent application Ser. No. 13 / 037,725 titled “INSULATIVE PRODUCTS HAVING BIO-BASED BINDERS” filed Mar. 1, 2011, and to applications to which it is in turn related, the entire contents of which are expressly incorporated herein by reference.TECHNICAL FIELD AND INDUSTRIAL APPLICABILITY OF THE INVENTION[0002]The present invention relates generally to fibrous insulation products and, more particularly, to packaging that improves the physical properties of fibrous insulation products, especially products that contain a bio-based binder.BACKGROUND OF THE INVENTION[0003]Conventional fibers are useful in a variety of applications including reinforcements, textiles, and acoustical and thermal insulation materials. Although mineral fibers (e.g., glass fibers) are typically used in insulation products and non-woven mats, depending on the particular application, organic fibers such as polypropylene, polyester, and...

Claims

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Application Information

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IPC IPC(8): B65B5/04
CPCB65B51/08B65B53/00B65B11/00B65D85/16B65D75/002B65D75/006B65B2220/20B65D85/07
Inventor TURNER, TIMOTHYDEPAAUW, ANN MARIEUGOREK, MICHAELMIRTH, DAVID R.
Owner OWENS CORNING INTELLECTUAL CAPITAL LLC
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