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Segment Information
 6 Months Ended
Jun. 30, 2020
Segment Reporting [Abstract]  
Segment Information Segment Information
As of June 30, 2020, the Company’s reportable segments were Performance Materials, Technical Nonwovens, and Thermal Acoustical Solutions.

Performance Materials Segment
 
The Performance Materials segment includes filtration media solutions primarily for air, fluid power, life science and industrial applications (“Filtration”), and sealing and gasket solutions, thermal insulation, energy storage, and other engineered products (“Sealing and Advanced Solutions”).

Filtration products include LydAir® MG (Micro-Glass) Air Filtration Media, LydAir® MB (Melt Blown) Air Filtration Media, LydAir® SC (Synthetic Composite) Air Filtration Media, and Arioso® Membrane Composite Media. These products constitute the critical media component of clean-air systems for applications in clean-space, commercial, industrial and residential HVAC, power generation, respiratory protection (including face mask material), and industrial processes. The Company has leveraged its extensive technical expertise and applications knowledge into a suite of media products covering the vast liquid filtration landscape across the transportation and industrial fields. The LyPore® Liquid Filtration Media series address a variety of application needs in fluid power including hydraulic filters, air-water and air-oil coalescing, industrial fluid processes and diesel fuel filtration. LyPore® media and Solupor® ultra-high molecular weight polyethylene membranes also serve critical liquid filtration/separation applications such as biopharmaceutical pre-filtration and clarification, lateral flow diagnostic and analytical testing, potable water filtration and high purity process filtration such as those found in food and beverage and medical applications.

Sealing and Advanced Solutions products include nonwoven specialty engineered materials for a multitude of applications. Interface fiber-reinforced gasket materials serve the heavy-duty diesel, automobile, small engine, transmission and compressor markets. These products handle demanding sealing challenges with a diverse range of metallic, non-metallic, rubber-coated and laminate materials that comprise the extensive Sealing materials portfolio. Interface Engineered Components are ready to use soft and hard gasket parts sold directly to OEMs and aftermarket applications. An example is Select-a-Seal® rubber-edged composite (REC) technology that provides robust sealing, compression, adhesion, and shear strength for driveline applications. Advanced Solutions’ nonwoven veils, papers and specialty composites for the building products, appliance, energy and industrial markets include Manniglas® Thermal Insulation Papers, and Lytherm® Insulation Media for high temperature technology applications. The Company's Cryotherm® Super-Insulating Media, CRS-Wrap® Super-Insulating Media and Cryo-Lite® Cryogenic Insulation products are industry standards for state-of-the-art cryogenic insulation designs used by manufacturers of cryogenic equipment for liquid gas storage, piping, and transportation. Additional specialty composite materials include specialty fiber calendar bowl products to service the printing and textile industries and press pad materials for industrial lamination processes.

Technical Nonwovens Segment

The Technical Nonwovens segment primarily produces needle punch nonwoven solutions for a multitude of industries and applications. Products are manufactured and sold globally under the leading brands of Lydall Industrial Filtration, Southern Felt, Gutsche, and Texel. Industrial Filtration products include nonwoven rolled-good felt media and filter bags used primarily in industrial air and liquid filtration applications. Nonwoven filter media is an effective solution to satisfy increasing emission control regulations in a wide range of industries, including power, cement, steel, asphalt, incineration, mining, food, and pharmaceutical. Advanced Materials products include nonwoven rolled-good media used in commercial applications and predominantly serves the geosynthetics, automotive, industrial, medical, and safety apparel markets. Automotive media is provided to Tier I/II suppliers as well as the Company's Thermal Acoustical Solutions segment.

Technical Nonwovens segment products include air and liquid filtration media sold under the brand names Fiberlox® high performance filtration felts, Checkstatic™ conductive filtration felts, Microfelt® high efficiency filtration felts, Pleatlox® pleatable filtration felts, Ultratech™ PTFE filtration felts, Powertech® and Powerlox® power generation filtration felts, Microcap® high efficiency liquid filtration felts, Duotech membrane composite filtration felts, along with our porotex® family of high temperature filtration felts including microvel® and optivel® products. Technical Nonwovens Advanced Materials
products are sold under the brand names Thermofit® thermo-formable products, Ecoduo® recycled content materials, Duotex® floor protection products, and Versaflex® composite molding materials. Technical Nonwovens also offers extensive finishing and coating capabilities which provide custom engineered properties tailored to meet the most demanding applications. The business leverages a wide range of fiber types and extensive technical capabilities to provide products that meet our customers’ needs across a variety of applications providing both high performance and durability.

Thermal Acoustical Solutions Segment 

The Thermal Acoustical Solutions segment offers a full range of innovative engineered products tailored for the transportation and industrial sectors to thermally shield sensitive components from high heat, improve exhaust gas treatment and lower harmful emissions as well as assist in the reduction of noise, vibration and harshness (NVH). Within the transportation sector, the Company’s products are found in the interior (dash insulators, cabin flooring), underbody (wheel well, aerodynamic belly pan, fuel tank, exhaust, tunnel, spare tire) and under hood (engine compartment, outer dash, powertrain, catalytic converter, turbo charger, manifolds) of cars, trucks, SUVs, heavy duty trucks and recreational vehicles.

Thermal Acoustical Solutions segment products offer thermal and acoustical insulating solutions comprised of organic and inorganic fiber composites that provide weight reduction, superior noise suppression and increased durability over conventional designs, as well as products that efficiently combine multiple layers of metal and thermal - acoustical insulation media to provide an engineered shielding solution for an array of application areas. Lydall’s dBCore® is a lightweight acoustical composite that emphasizes absorption principles over heavy-mass type systems. Lydall’s dBLyte® is a high-performance acoustical barrier with sound absorption and blocking properties and can be used throughout a vehicle’s interior to minimize intrusive noise from an engine compartment and road. Lydall’s ZeroClearance® is an innovative thermal solution that utilizes an adhesive backing for attachment and is used to protect vehicle components from excessive heat. Lydall’s flux® product family includes several patented or IP-rich products that address applications which include: Direct Exhaust Mount heat shields, which are assembled to high temperature components like catalytic converters, turbochargers or exhaust manifolds using aluminized and stainless steel and high performance and high temperature heat insulating materials; Powertrain heat shields that absorb noise at the source and do not contribute to the engine's noise budget; and durable, thermally robust solutions for temperature sensitive plastic components such as fuel tanks that are in proximity to high temperature heat sources.

The tables below present net sales and operating income by segment for the three-month and six- month periods ended June 30, 2020 and 2019, and also a reconciliation of total segment net sales and operating income to total consolidated net sales and operating income.

Consolidated net sales by segment:
For the Three Months Ended  
June 30,		For the Six Months Ended  
June 30,
In thousands2020201920202019
Performance Materials Segment:
Filtration$29,636  $24,732  $55,523  $48,666  
Sealing and Advanced Solutions28,837  40,370  68,170  81,016  
Performance Materials Segment net sales58,473  65,102  123,693  129,682  
Technical Nonwovens Segment (1):
Industrial Filtration29,413  38,706  60,782  81,070  
Advanced Materials (2)22,594  30,372  48,628  53,614  
Technical Nonwovens Segment net sales52,007  69,078  109,410  134,684  
Thermal Acoustical Solutions Segment:
Parts32,448  85,705  109,769  170,281  
Tooling5,000  7,567  11,440  17,304  
Thermal Acoustical Solutions Segment net sales37,448  93,272  121,209  187,585  
     Eliminations and Other (2)(1,768) (6,641) (7,625) (13,115) 
Consolidated Net Sales $146,160  $220,811  $346,687  $438,836  
Operating income by segment:
For the Three Months Ended  
June 30,		For the Six Months Ended  
June 30,
In thousands2020201920202019
Performance Materials (3)$5,443  $3,303  $(51,498) $4,762  
Technical Nonwovens (1),(2),(4)6,684  7,844  10,497  12,578  
Thermal Acoustical Solutions(6,285) 7,357  (657) 16,848  
Corporate Office Expenses(7,588) (5,325) (15,656) (11,959) 
Consolidated Operating Income$(1,746) $13,179  $(57,314) $22,229  
(1)The Technical Nonwovens segment includes the results of Geosol through the date of disposition of May 9, 2019.
(2)Included in the Technical Nonwovens segment and Eliminations and Other is $1.4 million and $4.6 million in intercompany sales to the Thermal Acoustical Solutions segment for the three-month periods ended June 30, 2020 and 2019, respectively, and $6.4 million and $9.3 million in intercompany sales to the Thermal Acoustical Solutions segment for the six-month periods ended June 30, 2020 and 2019.
(3)Included in the Performance Materials segment is $61.1 million of impairment charges related to goodwill and other long-lived assets for the six-month period ended June 30, 2020, $4.0 million and $4.1 million of intangible assets amortization for the three-month periods ended June 30, 2020 and 2019, respectively, and $7.9 million and $8.1 million of intangible assets amortization for the six-month periods ended June 30, 2020 and 2019, respectively.
(4)Included in the Technical Nonwovens segment is $1.2 million and $1.3 million of intangible assets amortization for the three-month periods ended June 30, 2020 and 2019, respectively, and $2.3 million and $2.6 million of intangible assets amortization for the six-month periods ended June 30, 2020 and 2019.