Let’s Laminate

 

Lamination is essentially marrying two or more layers of materials together to obtain superior performance characteristics for specific product applications.   Near IR Transmitters are well established to measure moisture and coating thickness in the lamination process.  Cross Direction Web Profilers greatly assist in producing an even in-specification profile of adhesive thickness.  The resulting composite may be designed as a superior moisture or odor barrier, to highlight/protect appearance or gloss, reduce sound transmission, to increase strength or structural stability and many other applications.

Auto windscreens (windshields)  laminate two pieces of glass with a layer of PVB (polyvinylbutyral)  or other suitable polymer to prevent or minimize sharp glass shards from showering on driver and passengers on impact by wrapping the glass surfaces with the polymer.  Near IR can measure the film moisture and thickness.

Converting industries such as Tag, Tape & Labels, Packaging & Release Liners, Textiles and others operate Near IR to measure the adhesive coat weight applied and the moisture after unit operations such as dryers, re-moisturizers and final windup for QC and Process Control.  For converting applications a two roll laminator is often employed with one roll made of neoprene or other suitable rubber and the other roll made of steel or chrome plated.  The rubber roll applies pressure to the adhesive but also allows for compensation of caliper variations.  Nip roll pressure and skew assist in optimizing the process.

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Guardian CD Web Profile System Options

Process Sensors Guardian Cross Direction Web Profile System can be as simple and inexpensive as an automatic scanning frame with 12” frame mounted Operator Interface (OI) for profile display and controls.

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The Guardian Profile System can also connect to a 19” Display at the Central Console or a 55” or larger display for multiple scanners and measurements integrated into a single distributed system.  The Guardian System can be operated manually or via a Human Machine Interface (HMI).

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Nonwoven Moisture Measurement with Process Near IR Transmitter

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Polypropylene Nonwoven

Nonwovens are usually manufactured from fibers or filaments as sheets or webs bonded together thermally, mechanically or chemically.  The term nonwoven indicates that they are not made by weaving or knitting. Sometimes a certain percentage of recycled fabrics and oil-based materials are used in nonwoven fabrics for strength characteristics for a given application. Nonwovens are generally recyclable and have gained favor in single use and disposable markets for ecological or “green” reasons and increasingly function as a substitute for polyurethane foam.  They are also used in the manufacture of bullet proof vests, very flexible material for a large number of applications.

These nonwoven engineered fabrics can have the same appearance and strength as woven fabrics.  Nonwovens can be thermally bound by adding a resin and heating up the web to melt the resin into the fibers or chemically bound with an adhesive or mechanically bound such as felts.  PET (polyethylene) and PP (polypropylene) are common chemical formulations used in the manufacture of nonwovens.

Near Infrared (NIR) process transmitters have several applications in the nonwoven manufacturing process that can reduce costs, increase line speed and quality control.  Primary application is moisture measurement at the dryer exit but these NIR transmitters can also measure water based binder coatings, and for low weight nonwoven webs, basis weight based on the hydrocarbon absorption peak at 2.34 µ.  Process Sensors MCT series of NIR transmitters meet these application requirements.  Please contact us at 508.473-9901 to discuss your application.