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How to Prepare Material for a Strain Gauge Installation

The Do's and Don'ts for Preparing a Successful Installation

Check the table below for a quick overview and suggestions on how to prepare your material for an effective strain gauge installation.

Wood
Pretreatment
Cleaning
Primer
Adhesive
Notice
Wood Dry grinding with glass or flint paper Blow off grinding dust with oil and water-free compressed air  - X60 Wood requires pore-filling adhesive

Rubber
Pretreatment
Cleaning
Primer
Adhesive
Notice
Rubber Light roughening, emery cloth grain size e.g. 300 Soapy1) water, rinse with deionized water  - X60 or Z70 Strain measurements might be problematic due to strain suppression resulting from the reaction force
1) Soaps used must not contain silicones

Plastics
Pretreatment
Cleaning
Primer
Adhesive
Notice
Acrylonitrile butadiene styrene (ABS) Roughen, emery cloth grain size 220 -300 or plasma treatment with oxygen Isopropanol or soapy1 water, rinse with deionized water      Z 70, X 280  
Polyimide (PI) Roughen, emery cloth grain size 220 -300 or plasma treatment with oxygen RMS 1   Z 70, X 60, X 280
EP 310 N, EP 150		  
Polyamide imide (PAI) Roughen, emery cloth grain size 220 -300 or plasma treatment with oxygen RMS 1   Z 70, X 60, X 280
EP 310 N, EP 150		  
Polymethyl-methacrylate (PMMA) Roughen, emery cloth grain size 220 -300 or plasma treatment with oxygen Isopropanol   Z 70, X 60, X 280 Also only bondable with dichloromethane
Polycarbonate (PC) Roughen, emery cloth grain size 220 -300 or plasma treatment with oxygen Isopropanol
 		   Z 70, X 60, X 280 Also only bondable with dichloromethane
Polyamide (PA) Roughen, emery cloth grain size 220 -300 or plasma treatment with oxygen RMS 1   Z 70, X 60, X 280 In case of adhesion problems pretreat with hydrogen peroxide
Polypropylene (PP) Roughen wet, emery cloth grain size 220 -300
and/or plasma treatment with oxygen		 RMS 1 Sicomet, Power-Primer 1® Z 70, X 280 PP is very low-energetic,
and as a result exhibits poor adhesion
Powerprimer shows good results (without roughening, cleaning only)
Polyethylene (PE) Roughen wet, emery cloth grain size 220 -300
and/or plasma treatment with oxygen		 Isopropanol or soapy1 water, rinse with deionized water Sicomet, Power-Primer 1®" Z 70, X 280 PE is very low-energetic, and as a result exhibits poor adhesion
Powerprimer shows good results
Polyvinyl chloride (PVC) Roughen, emery cloth grain size 220 -300 or plasma treatment with oxygen Isopropanol or soapy1 water, rinse with deionized water   Z 70, X 60, X 280 With softener content >50%
no permanent adhesion possible
Polyurethane (PUR) Roughen, emery cloth grain size 220 -300 or plasma treatment with oxygen Soapy1 water, rinse with deionized water   Z 70, X 60, X 280  
Epoxy resin (EP) Roughen, emery cloth grain size 220 -300 or plasma treatment with oxygen RMS 1   Z 70, X 60, X 280  
Fluoropolymers (PTFE, FEP, PFA) Activate surface with Tetra Etch® Warm water, Acetone   Z 70  
Polyvinyl fluoride (PVF) Roughen, emery cloth grain size 220 -300 or plasma treatment with oxygen RMS 1   Z 70  
Polyvinylidene fluoride (PVDF) Roughen, emery cloth grain size 220 -300 or plasma treatment with oxygen RMS 1   Z 70  
Polyester (UP) Roughen, emery cloth grain size 220 -300 or plasma treatment with oxygen Isopropanol or soapy1 water, rinse with deionized water   Z 70, X 60, X 280  
Polyaryletherketones (PEEK, PEK) Roughen, emery cloth grain size 220 -300 or plasma treatment with oxygen RMS 1   Z 70, X 280
EP 310 N, EP 150		  
Polystyrene (PS) Roughen, emery cloth grain size 220 -300 or plasma treatment with oxygen Isopropanol or soapy1 water, rinse with deionized water    Z 70,  
Polyphenylene sulfide (PPS) Roughen, emery cloth grain size 220 -300 or plasma treatment with oxygen RMS 1   Z 70, X 280
EP 150, EP 310 N		  
Polyethersulfone (PES) Roughen, emery cloth grain size 220 -300 or plasma treatment with oxygen Isopropanol or soapy1 water, rinse with deionized water   Z 70, X 280
EP 150, EP 310 N		  
Polysulfone (PSU) Roughen, emery cloth grain size 220 -300 or plasma treatment with oxygen Isopropanol or soapy1 water, rinse with deionized water   Z 70, X 280
EP 150, EP 310 N		  
Polyoxymethylene (POM) Plasma treatment with oxygen Isopropanol or soapy1 water, rinse with deionized water    Z 70, Roughening has little effect
Polyethylene terephthalate (PET) Roughen, emery cloth grain size 220 -300 or plasma treatment with oxygen Isopropanol or soapy1 water, rinse with deionized water    Z 70,  
Polybutylene terephthalate (PBT) Roughen, emery cloth grain size 220 -300 or plasma treatment with oxygen Isopropanol or soapy1 water, rinse with deionized water    Z 70,  
Phenol formaldehyde resin (PF) Roughen, emery cloth grain size 220 -300 or plasma treatment with oxygen RMS 1   Z 70, X 60, X 280
EP 310 N, EP 150		  

Glass
Pretreatment
Cleaning
Primer
Adhesive
Notice
Silicate glass, glazed porcelain, enamel Degreased glass surface can be bonded directly;roughening or other preparations are not necessary RMS 1  - X60 or Z70  -

Fiber-reinforced plastics
(Click here for more info)
Pretreatment
Cleaning
Primer
Adhesive
Notice
Carbon fiber reinforced plastic (CRP) Roughen, emery cloth grain size 220 -300 or plasma treatment with oxygen Soapy1) water,
rinse with deionized water		  - Z70, X60, X280
depending on resin
EP150, EP310N		 Do not damage carbon fibers when sanding.
Do not use organic solvents for cleaning.
Glass fiber reinforced plastic (GRP) Roughen, emery cloth grain size 220 -300 or plasma treatment with oxygen Soapy1) water,
rinse with deionized water		  - Z70, X60, X280
depending on resin
EP150, EP310N		 Do not damage glass fibers when sanding.
Do not use organic solvents for cleaning.

1) Soaps used must not contain silicones

Concrete
(Click here for more info)
Pretreatment
Cleaning
Primer
Adhesive
Notice
Concrete with different grain sizes Cast with dry molds: remove concrete laitance;
Cast with oil molds: oil-soaked layer must be removed; 		 Blow off grinding dust with oil and water-free compressed air;
Degreasing with solvent is not recommended		  -  X60 Concrete requires a strong pore-filling adhesive

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