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Kinetics™

Loaded Limp Mass Barrier Material

Model KNM

Loaded Vinyl Limp Mass Barrier Material

Description

Model KNM mass-loaded, limp, vinyl barrier materials are used for enclosing noise sources, either draped around equipment, suspended between equipment and quiet areas, or lagged to the equipment casing. KNM Barrier Materials can be used effectively to lag piping systems, reducing valves, etc., and are highly effective as crosstalk barriers and septums. KNM materials are available in 0.50 psf to 1.0 psf (2.5 to 4.9 kg/m2) surface weight, in 54-inch wide x 20-yard (1372 mm x 18.2 m) rolls, with acoustical ratings of STC-21 to STC-26. Product is easy to cut and install. KNM 2.0 psf (10.8 Kb/m2) barrier material, model KNM-200B or KNM-200AL comes in 47.5-inch wide x 10-yard (1206 mm x 9.1 m) rolls.

Kinetics Model KNM-C Clearview Noise Barriers are transparent, limp, heavy PVC and are recommended for use in applications where it is necessary to maintain visual contact, yet achieve a high degree of noise reduction. KNM-C materials are available in 48-inch wide by 20 yard (1219 mm x 18.2 m) rolls with acoustical ratings of STC-21 and STC-26.

Loaded Vinyl Limp Mass Barrier Material

Application

Physical Properties

Product Weight
Lbs./Sq. Ft.
(kg/m2)
Tensile Strength
Lbs./In.
(kg/mm)
Tear Strength
Lbs./In.
(kg/mm)
Flammability
Flameout,
Sec.
Afterglow,
Sec.
Char Length,
In. (mm)
KNM-50C 0.50 (2.5) 201 (3.6) 70 (1.2) 3 0 0.5 (13)
KNM-50B 0.50 (2.5) 55 (1.0) 10 (0.2) 3 0 1.7 (43)
KNM-50RB 0.50 (2.5) 300 (5.3) 100 (1.8) 3 0 0.2 (5)
KNM-100C 1.00 (4.9) 400 (7.1) 140 (2.5) 3 0 0.5 (13)
KNM-100B 1.00 (4.9) 105 (1.9) 20 (0.4) 0 0 0.2 (5)
KNM-100RB 1.00 (4.9) 300 (5.3) 100 (1.8) 0 0 0.2 (5)

Sound Transmission Loss, dB

Product Weight
Sq. Ft. (cm2)
125 250 500 1000 2000 4000 STC
KNM-50C 0.50 (464) 11 12 15 20 26 32 21
KNM-50B 0.50 (464) 11 12 15 20 26 32 21
KNM-50RB 0.50 (464) 11 12 15 20 26 32 21
KNM-100C 1.00 (929) 15 19 21 28 33 37 26
KNM-100B 1.00 (929) 13 17 21 28 33 40 26
KNM-100RB 1.00 (929) 15 19 21 28 33 37 26
KNM-200B 2.00 (1858) STC estimated 31

Note: Barrier materials used for pipe/duct lagging are tested as wrapped around the noise source (pipe/duct). Insertion Loss Data per ASTM E1222-90 using Model KNM-100ALQ and KNM-200AL pipe/duct lagging.

Product Descriptions

KNM-50C 1/2 PSF (2.5 kg/m2)
KINETICS™ Clearview barrier material, nonloaded and nonreinforced. Clearview is very limp, tough and water clear. Available in 48-inch x 20 yard (1219 mm x 18.2 m) rolls.

KNM-100C 1 PSF (4.9 kg/m2)
KINETICS™ Clearview barrier material, nonloaded and nonreinforced. Clearview is very limp, tough and water clear. Available in 48-inch x 20 yard (1219 mm x 18.2 m) rolls.

KNM-50B 1/2 PSF (2.5 kg/m2)
KINETICS™ limp barrier material, unreinforced and loaded with barium sulphate. Available in black color in 54-inch x 20 yard (1372 mm x 18.2 m) rolls.

KNM-100B 1 PSF (4.9 kg/m2)
KINETICS™ limp barrier material, unreinforced and loaded with barium sulphate. Available in black color in 54-inch x 20 yard (1372 mm x 18.2 m) rolls.

KNM-200B 2 PSF (10.8 kg/m2)
KINETICS™ limp barrier material, unreinforced and loaded with barium sulphate. Available in black color in 47.5-inch x 10 yard (1206 mm x 9.1 m) rolls.

KNM-50RB 1/2 PSF (2.5 kg/m2)
KINETICS™ limp barrier material, reinforced with a fiberglass screen, and loaded with barium sulphate. Available in light tan color in 54-inch x 20 yard (1372 mm x 18.2 m) rolls.

KNM-100RB 1 PSF (4.9 kg/m2)
KINETICS™ limp barrier material, reinforced with a fiberglass screen, and loaded with barium sulphate. Available in grey color in 54-inch x 20 yard (1372 mm x 18.2 m) rolls.

Specification

Barrier material shall meet the sound transmission loss and physical properties performance and the flammability standards listed.

Barrier material shall have a minimum continuous operating temperature range from -40F to 180F (-40C to 82.2C), be resistant to water, oils, weak acids, alkalies, and fungi, and have excellent weather resistance.

Barrier material to be Model KNM by Kinetics Noise Control, Inc.

Model KNM Barrier Material
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