You are here:  » Knowledge center » Tape ABC 

Tape ABC

Opens internal link in current windowA  Opens internal link in current windowB  Opens internal link in current windowC  Opens internal link in current windowD  Opens internal link in current windowE  Opens internal link in current windowF  Opens internal link in current windowH  Opens internal link in current windowI  Opens internal link in current windowK  Opens internal link in current windowL  Opens internal link in current windowM  Opens internal link in current windowN  Opens internal link in current windowO  Opens internal link in current windowP  Opens internal link in current windowR  Opens internal link in current windowS  Opens internal link in current windowT  Opens internal link in current windowU

Acrylic-adhesive

Polymerized acrylic ester monomers are the chemical basis of acrylic adhesive. Usually resins are admixed. These adhesives can be either dissolved in solvents or in aqueous dispersions. The outstanding properties of acrylic adhesives are ageing and in areas of high temperature resistance and utmost resistance to UV radiation and oxidation.

Adhesion

This term is the same as adhesive force. This refers to the force that is required to remove a a tape again which is stuck onto a surface. To achieve comparable values it is tested according to set standards in laboratory testing: Then a 25mm wide adhesive tape adhered to a polished steel plate and then it is peeled off at a constant, fixed speed in the angle of 180 ° and the force measured as required in kp or N.

Adhesive Force

This term is the same like adhesion. This refers to the force that is required to pull off again a tape glued onto a surface. To achieve comparable values is tested according to set standards in laboratory testing: Then a 25mm wide adhesive tape adhered to a polished steel plate and then peeled off at a constant, fixed speed in the angle of 180 ° and measuring the force required in kp or N.

Backing

Backing is defined as the material on which the adhesive is applied. Which are typically foils, fabrics, or paper.

Ball Test

To determine the stickiness of a adhesive a steel ball rolls on an inclined plane on the adhesive side. he shorter the distance is, the ball can travel on it, the more is the glue sticky. The ball test is measured in cm. The test is very controversial, because no accurate data can be collected.

Breakdown Voltage

The resistance created by running an insulating power opposes until breakdown. The breakdown voltage is measured in volts.

Butyl - Adhesive

This adhesive consists of a mixture of natural rubber and isobutylene. Soot particles are embedded therein. A high degree of cross linking is achieved with our tapes by hot calendaring. Thus, even the highest durability and suitability is given for long-term use in outdoor exposure. Special advantages of our butyl adhesives are also highly resistance to UV radiation and oxidation as well as the unique property of cold welding. ==> cold welding

Calender

Machine with rolls arranged in succession or one above the other, mostly heated rolls, with which surfaces of backing materials are smoothed and adhesive is rolled out to the desired, very thin thickness. Even foils with the highest tensile strength are produced on calanders by stretching, often biaxially. (e.g. strapping tape.)

Cohesion

=> shear strength. Force needed to cleave the layer of adhesive. Adhesive with low cohesion leave residue when on the previously glued surface. Particularly undesirable in masking tapes.

Composite material

Different carriers are joined inseparably (laminated), the addition of the respective features result in a most appropriate optimal composite material.

Cold Welding

Butyl adhesives possess the property to stick both to themselves, as well as nearly on any other surface immediately and absolutely not removable.This is called a cold weld. Even with slightly dirty and slightly damp surfaces is still a good bond possible. However on siliconized surfaces is a cold-welding not possible.

Corrosion

Starts first on the surface and eventually leads to the complete destruction of solid materials due to the action of gases, acids and alkalis.

Cross linking

This refers to the chemical modification of the molecular chains of substances. That is, the original three-dimensional molecular chains are linked to a network. The cross linking of adhesives is to control the adhesion and cohesion of the adhesive and to increase the resistance to chemical and thermal influences.

Density

=> volume weight. The amount of material in relation to a unit volume. The density is expressed in weight of a cubic meter (= volume weight). In the area of tapes only the density of foam backings is of relevance.

Density

Density is the material weight of a cubic meter (m3). It is expressed in kg/m3. Important for the determination of foams.

Dispersion

This refers to the fine dispersion of very small solids in the water. In the area of tapes are acrylic and acrylate dispersions adhesives of very great importance.

Electrolytic corrosion factor

This is the effect of a possible corrosion of a tape to a different material. For measurement of the factor, the adhesive tape is adhered to a copper foil. No corrosion occurs, the tape gets the electrolytic corrosion factor 1. At the slightest corrosion receives the tape a corrosion factor below 1.0, which then, depending on the magnitude of the identified corrosion is further reduced.

Flat Crepe Paper

Is required for masking during painting for bundling, marking, etc. Crepe paper consists of paper, which is usually coated on one side on the surface or impregnated. The thickness of the strip is usually max. 0.2mm. Crepe paper can be extended up to 15% of its original length to his breaking point.

Heat-curing

This is the special property of an adhesive to increase by the effect of heat on hardness and adhesion. Apply thermosetting bands in electrical engineering, in the production of capacitors, and in the coil winding.

High Crepe Paper

This refers to a paper tape, which strongly glued not usually painted, by at least 40% of its original length can be expanded up to its breaking point.

Hotmelt-Adhesive

These adhesives consist of dry, non-adhesive synthetic resins, which are melted by high temperatures of 130 ° C to 180 ° C and after cooling to keep a high degree of tack and adhesion. Benefits of Hot-Melt-adhesive are its very high bond strength at normal temperatures, its disadvantages in sensitivity to temperatures above 40 ° C and UV radiation, lack of resistance to plasticizers and low durability. By admixtures, these negative characteristics are reduced. This allows, for example, hot-melt adhesives are largely resistant to plasticizers.

Initial tack

Some adhesives, especially those on butyl and acrylic base, only reach their highest bond strength after hours or days. However, since often the initial bond must be very high, other adhesives are used (hot melt, solvent based, natural rubber, synthetic rubber, silicone adhesive).

Insulant Classes

Tapes used in the electrical sector, are called according to their duration of heat capacity in temperature ranges and heat ranges, from "Y" to "H" divided. The individual classes mean:

  • Class Y is a continuous temperature of 95 ° C
  • Class E Y is a continuous temperature of 120°C
  • Class B is a continuous temperature of 130°C
  • Class F is a continuous temperature of 155°C
  • Class H is a continuous temperature of 180°C

Conclusions of other technical characteristics of the tapes cannot be made to the assignment to insulation.

Insulation

This refers to the partial or complete shielding an object from external influences such as humidity, heat, cold, noise, dust and electricity.

kp

Abbreviation for kilopond. 1kp the unit of force is acting on a mass of 1kg its suspension point.

Laminate

=> composite material.

µ

Letter of the Greek alphabet. This refers to the unit of measurement, especially in the area of low thicknesses backing foils this plays a role. A μ = 1 thousandth of a millimeter. (0.001mm)

N (Newton)

Abbreviation for Newton. 1 Newton is the force that accelerates a mass of one kilogram of 1m per s2.

Non-Woven

Fiber fleece consists of only lying in the longitudinal direction of natural or synthetic fibers, in which these create a composite by adhesive or by pressing and heat. (e.g. Tempo handkerchiefs)

Opaque

Means non-transparent. Especially important with UV resistant tapes.

PE

Abbreviation for polyethylene. Some backings are made of polyethylene. PE plastic foils are soft and extremely elastic, have a high density, but only low tensile strength. Polyethylene is very sensitive to UV radiation. Exposed to daylight, rotting polyethylene leave by themselves without residue. Therefore, the material is classified as environmentally friendly. PE foils, however, are resistant to solvents. In the tape area, they are important for the production of weak adhesive protective foils for the underground pipe insulation, as well as for the screen printing area.

PET-Foil

Very high tensile and tear characterize the polyester film. Even at very low thicknesses of 0.025mm for example, the film is very hard to break. In addition, the material is very resistant to high temperatures, alkalis, acids, oils and many solvents. Therefore, PET films play in the tape area a very important role, especially in the screen printing technique and the electrical sector.

Polyimide Foil

Polymer film in brown luzenter coloration . This film is very heat resistant and extremely durable. Polyimidbänder find frequent application in the electrical industry.

PP-Foil

Of polypropylene foils in very large scale, packaging tapes made. PP films are resistant to alkalis, acids and solvents. They are very resistant to tearing and tearing, furthermore  exceptional cheap. Since PP films are very sensitive to UV radiation, these films rot outdoors without leaving a trace. For this reason, PP foil tapes are considered very environmentally friendly. Aluminized PP foil tapes are used for bonding insulating materials.

Primer

Many carriers cannot have a direct coating due to their chemical and physical properties, because the adhesive anchoring is inadequate. Therefore often together with the adhesive coating is a primer coat is applied with a coupling agent.

PU

PU is short for polyurethane plastic. As backing material in the form of polyurethane foam this plastics plays a major role. Moreover, even PU films and foils of extreme stretch and tear resistance are produced. PU foam is used as a backing for mirror tape.

PVC-film

PVC films often serve as backing for tapes. In the packaging industry, these are for rigid PVC films in the insulating plasticized PVC films. Rigid PVC films are very rugged and easy to print. Basically have PVC films good UV stability. Tapes with backing made of PVC films are used so frequently for outdoor application.

Resilience

This refers to the tendency of a flexible backing to shrink back to its extension to its original length. Often the case with PP film backings.

Resistance to ageing

All tapes age, i.e. they change their characteristics to a greater extent, the longer they are stored. These chemical and physical changes do not necessarily reduce the usefulness of the tape. Some adhesives have only at higher cohesion values after ageing . No measurable change should occur in the properties within the first six months of tapes. After 12 months, no negative measurable change of the properties, referred to as a good resistance to ageing. Most of our tapes meet these criteria even after several years of storage yet fully its purpose.

Rubber - Adhesive

They consist of natural rubber, which is ground and then mixed with a solvent such as gasoline. It will dissolve the rubber and a tough adhesive is created. High adhesion and good shear strength characterize the adhesive. Disadvantages: Average temperature and aging resistance, and lack of resistance to UV radiation and sensitivity to low (below 10 ° C) and elevated (50 ° C) temperatures.

Separating layers

Under separation layer is meant usually a film, a foil or a smooth paper, which has been one-sided or double-sided siliconized and thus makes it adhesive repellent. Separating layers must lie between the individual layers of tape if the adhesive adheres to the carrier's too tight or even cold welding (butyl adhesive). For two-sided adhesive tape, the release liner must be siliconized always two-sided.

Shear Strength

The term of the shear strength of an adhesive is almost identical with cohesion: Shear strength is the adhesiveness or the bond strength for stress caused by different draw weights and usually elevated temperatures. Thus, the shear strength can be measured by weight or by units of time and is defined. The procedure is as follows: An adhesive tape portion is bonded to one of its ends to a rigid, fixed and polished steel plate. Subsequently, on the other free end of the tape is a weight attached. By changing and increasing the weights can now be determined, up to which maximum weight the adhesive sticks on the steel plate without the adhesive tape is drawn down by the weight, slowly slipping down "shearing" finally dropping. The same experiment at different temperatures gives information about the behavior, (the resistance) of the adhesive at different temperature effects.

Siliconizing

Silicone is a non-metallic compound, which occurs according to the oxygen on the earth at the common, even if only in combination with other substances. Silicone compounds are dissolved in solvents but also in dispersions. They are dissolved in this state then applied to paper, and films, and then cross linked under high pressure. Siliconized surfaces are very smooth and slippery. Common adhesive cannot stick on silicone. For this purpose one needs silicone adhesive.

Silicon-Adhesive

Silicone adhesive consists of synthetic polymers with rubber-like properties (elastomers), which together with an adhesive organic silicone compounds of high temperature resistance and resistance to extreme cold. Silicone adhesive is the only glue which sticks on siliconized foil and paper.

Splicing

Taken over from the English word. Means something like adhesive or mend. In the foil - paper and cardboard industry very common. Splices are used in these industries to make paper - or foil webs endless. For this, various splicing tapes are used.

Stickiness

Usually a very "sticky" touching material has no inner strength, so no cohesion. Honey is the best example. Nevertheless, very often for rough, uneven and dusty surfaces a very sticky material is needed. The stickiness is measured by the ball test.=> ball test

Storage

For the storage of tape is to be paid attention that the tapes are stored in the dark and at a temperature of approximately 18 ° C. Most tapes have good resistance to aging, the time factor plays a smaller role.

Tear Strength

In general, the tensile strength is determined by a tensile testing machine. Thereby both ends of a 25 mm wide tape are firmly clamped, after which one of the ends to the other end opposite is slowly drawn with a standardized speed, until the tape breaks. The force which is needed for that, is measured in Newtons (N). The adhesive does not matter in this test. Large variations occur, however, often because of irregularities related fabrication play a crucial support role. For this reason, as a rule, an average of at least 20 measurements reported as tensile strength value.

Telescoping

Telescoping is when there is a tape, caused by strong internal pressure, sideways, like a funnel, out telescopically. The tape pushes therefore out laterally as it by the upper layers of tape and not upwardly through the solid core can not escape downward. This deformation that does not affect the adhesive properties, is formed by winding too tight during the production of adhesive tape or by a subsequent swelling when the tape is exposed to high humidity unprotected.

Temperature Range

With rising temperatures, the stickiness increases and reduces the bond strength of adhesive tapes (except thermosetting adhesive). With falling temperatures while going back stickiness, increases the bond strength but only in the medium temperatures from 18 ° C to 25 ° C. If tapes are kept in cold storage, they must be to process them to return to room temperature of approximately 20 ° C.

Tightness

This means the property of a material that pass through the foreign substances or energies to counter resistance. Of great importance in the area of tapes is the tightness of the backings to chemicals, moisture and gases.

UV - radiation

UV rays one finds in daylight, especially contained in sunlight. In rubber and hot melt adhesives, they  activate a chemical reaction that can destroy the molecular structure in a short time, in extreme cases, in minutes. Tapes with these adhesives must therefore always be stored in the dark. Direct sunlight or outdoor exposure must be avoided. Extensive resistance to UV radiation have acrylic and butyl tapes.

National partners

Riewoldt GmbH is a tesa industry and converting partner

Tested quality

We are certified acc. to DIN EN ISO 9001:2015
Opens internal link in current windowmore

Contact

Riewoldt GmbH
Niederkasseler Strasse 17
51147 Cologne
Germany

Phone: +49 22 03 - 6 00 98 - 0
Telefax: +49 22 03 - 6 00 98 - 50 

E-mail: Opens window for sending emailinfo(at)riewoldt.de

Opens internal link in current windowContact form