The quality specifications provided in this chapter are the minimum quality specifications which cullet is required to meet for purposes of the exemption specified in Section 19522.
Chapter 3Cullet Specifications for Fiberglass Manufacturing
Section § 19515
This law section states that the quality standards listed in this chapter are the lowest standards that cullet (recycled glass) must meet to qualify for an exemption referenced in another section, Section 19522.
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Section § 19515.5
This section outlines the chemical composition requirements for certain materials, likely involving fiberglass products. For each oxide and compound listed, such as Silicon Dioxide and Calcium Oxide, there are specified percentage weight ranges allowed. These components must adhere to certain tolerances, ensuring they stay within a given percentage range of the target values.
Additional specifics include moisture content, which must be below 0.5%, and that the material should not cake, maintaining a free-flowing property. This implies stringent quality control measures in manufacturing these materials.
Chemical Composition
Tolerance
(+ or -
Oxides
Percentage Weight
Percentage Range)
Silicon Dioxide
66-75
1.00
Aluminum Oxide
0-7
0.50
Calcium Oxide
5-15
0.50
Magnesium Oxide
0-5
0.50
Sodium Oxide
8-18
0.50
Potassium Oxide
0-4
0.50
Iron Oxide
less than 0.5
0.05
Chromium Oxide
less than 0.1
0.02
Sulfur Trioxide
less than 0.2
0.02
All other oxides
less than 0.1
0.02
Organic Carbon
less than 0.1
0.02
Moisture Content
less than 0.5
0.05
(No caking with free-flowing fiberglass)
Loss on Ignition
less than 1.0
0.10
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Section § 19516
This section sets limits on the amount of certain inorganic materials that can be present in a sample based on their mesh size. It specifies that materials larger than a 12 mesh sieve should not be present at all. Materials larger than a 20 mesh should comprise less than 0.1% by weight, while materials smaller than a 20 mesh should be under 0.2%. Magnetic materials should also be less than 0.1% and nonmagnetic metals are not permitted.
Contaminants
Other Inorganic Material
Percentage Weight
+ 12 Mesh
None
+ 20 Mesh
less than 0.1
− 20 Mesh
less than 0.2
Magnetic Materials
less than 0.1
Nonmagnetic Metals
None
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Section § 19517
This section covers the requirements for the physical makeup of cullet, which is crushed glass used in fiberglass production. It specifies two types based on the needs of the manufacturer: coarse and fine cullet. Coarse cullet must have at least 25% of material passing through a 12-mesh screen, with no particles larger than 1/4 inch and a maximum of 15% that is very fine. Fine cullet should have 0.5% or less passing through a 12-mesh screen with similar fine particle limits.
The section also outlines acceptable color distributions for flint, green, and amber cullet. Each color type has a nominal percentage weight with a tolerance of +/- 3.0%.
Physical Composition
Particle Size: Cullet shall be one of two types below depending upon the requirements of the fiberglass manufacturer.
Screen Size
Coarse Cullet
Fine Cullet
+ ¼″
0%
0%
+ 12 Mesh
25% Minimum
0.5%
Maximum
– 200 Mesh
15% Maximum
15.0% Maximum
Color Distribution
Tolerance
(+ or –
Type
Nominal Percentage Weight
Percentage Range)
Flint
0–100
+ or – 3.0
Green
1–100
+ or – 3.0
Amber
less than 25
+ or – 3.0
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Section § 19518
This section states that the department has the authority to modify minimum quality requirements for cullet, which is recycled glass, depending on how well the fiberglass industry can handle increased contamination in the cullet.
The department may change minimum quality specifications based upon the fiberglass industries’ ability to use cullet with higher levels of contamination.
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Section § 19519
This law requires fiberglass manufacturers to follow all relevant state and federal environmental, health, and safety laws when they use recycled glass pieces, known as cullet, in making fiberglass.
A fiberglass manufacturer shall comply with all applicable state and federal laws, regulations, and permits concerning the environment, health, or safety when using cullet in fiberglass manufacturing.
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