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Test for "Mechanical/ technological properties"

Mechanical, technological and material properties

The practical characterization of the mechanical and technological properties of packaging materials on the basis of standardized laboratory methods requires a high level of experience and responsibility.The results serve for providing and supervising technical specifications, for the evaluation of test series or sample productions and for the treatment of cases of damage. In our company are your test orders in trusted hands.


Seal strength, tensile test on strips (temperature range -40 to +120 °C)
Seal strength of machine-made sealings from pouches, sacks, packages, lidding films sealed on trays, cups etc. or sealing samples according DIN 55529 or ASTM F 88 (1 inch or 15 mm wide specimen), DIN EN 868 part 5 appendix D of medical packagings inclusive description of appearance of fracture.


Dart Drop Test (Impact resistance)
ASTM D 1709/ ISO 7765-1; free falling dart method, method A (thinner films mf >0,05 kg), method B (stronger films mf > 0,3 kg)


bond strength/ peel force of laminates/ multilayer films/ bondings (temperature range -40 to +120 °C)
DIN 53357 A (historical)/ ASTM F 904/ DIN EN ISO 11339 peel test after separation of the laminated layers (accredited test method)


tensile test films and laminates (temperature range -40 to +120 °C)
DIN EN ISO 527 / ASTM D 882 determination of: secant modulus, tensile strength, elongation at break (accredited test method)


coefficient of friction COF
DIN EN ISO 8295/ ASTM D 1894 static and kinetic (accredited test method)


Determination of thickness of plastic films, aluminium foils, plane multilayer-materials and sheets
determination by mechanical scanning (accredited test method)


Sealing properties, verification and comparison by laboratory sealing press
Preparing of sealings on our laboratory sealing press (Kopp) and measuring the sealing strength with a Zwick tensile tester. The sealings are prepared by ​​using pre-agreed parameters. To create sealing curves individual parameters are varied, e.g. for determining the dependence of the sealing properties on the sealing temperature Ts [° C]. Of course, sealing curves can also determined as a function of sealing pressure ps [N / cm] or sealing time ts [s]. Typically, one parameter is varied over 5 equal steps and the results are plotted graphically as a function of the variable. (accredit testing)


Puncture resistance, quasi- statical (temperature range -40 to +120 °C)
Test performed with Zwick tensile/ compression- tester, testing speed 25 resp. 100 mm/min, acc. DIN EN 14477 (stylus: Diameter = 0,8 mm, stylus spherical Radius = 0,4 mm). ASTM F 1306, stylus: spherical, radius = 1,6 mm)Tests carried out at room temperature for the standard price. For tests in the thermal chamber additional charge. The minimum and maximum technically feasible temperature ranges are dependent on the material. We will gladly advise you.


grammage
gravimetric determination of grammage of plastic films, paper, fabrics, nonwovens etc., calculation of yield in the dimension [m²/ kg material]


Tearing resistance (Elmendorf)
The examination of the tearing behavior by using the Elmendorf Tear Tester is a dynamic (impact) test. It is e.g. useful for verifying the effectiveness of easy opening devices on plastic bags, and to assess the influence of stretching processes or reduced wall thickness on film properties. The test can be performed on paper, film, flexible laminated film etc.


Surface resistance/ resistivity
Mit circular electrode with shielding or polymeric blade electrode(Bayer- electrode). Documentation in report as direct result (electrode-dependent) and surface resistivity. Conditioning as agreed, measurements even under conditions deviating from the standard climate of 23°C/ 50% r.h. possible in climate chamber.


FINAT peel adhesion
Determination of the peel adhesion of adhesive labels, self-adhesive tapes against standard glass or other surfaces / adhesives.


Dimensions and repeating patterns of pouches, sacks etc.
Dimensions like width, length, side gusset depth, bags, reels, packages with calibrated metal measuring stick, n=5


Seal seam quality of PE- pouches or sacks (temperature range -40 to +120 °C)
You send us in pouches, sacks or sealings made of polyethylene film. We determine the seal strength quality in [%] relative to film strength, according GKV-test and evaluation clause Leaf III per seal (eg bottom seam) n = 10 individual measurements to lot size 5000 pieces, additional measurements for larger lots optional. The strength of unsealed flim is measured and set in relation to the strength of the seal tested under identical conditions.


Gelboflextest/ Brugger KFT
Wrinkle test, wherein a sheet of film of approximately DIN A 4 by Brugger KFT tester is wrung together cylindrically over an angle of max. 440 °. Usually 100 cycles are performed, afterwards the sample ist tested e.g. on hole formation, delamination, oxygen- or water- vapour- transmission- rate, optical density, or the like. The base price includes the examination of max. 4 sheets over 100 cycles at an angle of max. 440 °. Other test conditions are available upon request, this will be billed at an hourly rate. Minimum sample size 280 mm x 200 mm


tensile test aluminium foils
DIN EN 546-2 determination of tensile strength RM, max. load Fmax, elongation at break A 100 oder A50


linear dimensional changes/ dimensional stability of films and sheets
Determination of linear dimensional changes after exposure to temperature (till ca. 175°C, depending on material) of plastic films and sheets. Please select testing temperature. For shrink films we recommend the examination of shrinkage or shrinking stress.


sealing properties of plastic films/ Hot- Tack- Test
Only suitable for flexible films. Preparing of sealings and testing by means of Hot-Tack- Tester (KOPP- apparatus) analogue ASTM F 1921.The tests are prepared by ​​using pre-agreed parameters. To create sealing curves individual parameters are varied, e.g. for determining the dependence of the sealing properties on the sealing temperature Ts [° C]. Of course, sealing curves can also determined as a function of cooling time [ms], sealing pressure ps [N / cm], sealing time ts [s] or testing speed [m/s]. Typically, one parameter is varied over 5 equal steps and the results are plotted graphically as a function of the variable. (accredited test).


tear resistance (also folded edges), (temperature range -40 to +120 °C)
methods available: DIN 53363 (trapezoid) / ISO 34 meth. B (Graves, hist- DIN 53515)/ DIN EN ISO 6383-1 (Trouser)/FhG Merkblatt 6 Teil 9 folded edges (analogue DIN 53363 trapezoide, extra charge!)


water absorption of paper/ Cobb- test
DIN EN ISO 535


Wetting tension (e.g. for determination of Corona treatment intensity)
Suitable for plastic films and sheets (Union Carbide test) as well as for plastic coatings´on paper and other substrates. The test is carried out by wetting the material surface by coloured inks with specified wetting tension for determination of the critical surface tension.. Standard parameter for the assessment of surface tension after corona treatment (also called "Dyn-number")


Bending stiffness
2-point- bending-method, bending length and angle depending on sample material


Seal resistance of printings or coatings (heat resitance)
Over sealing of the sample against fine paper by laboratory sealer with smooth or structurated sealing bars, determination of max Ts [°C] till deterioration of printing or laquer (adhesion, discoloration) with constant ps [N/cm²], ts [s].


curling or flatness
The curl of sheet materials depends generally on temperature and conditioning state. So multilayer materials produced by usage of materials having different coefficients of thermal expansion or unequal expansion/ shrinkage due to differing hygroscopic tendency may tend to curl caused by a kind of bi-metall effect. In addition to that excessive mechanical stress in the processing of rolls can cause curl.


penetrability of fat/ fat- proof test
Testing of paper, coated paper or plastic films with pigmented palm kernel fat. The sample is covered on the test surface with the test fat and then the glass pane and, if necessary, additional weights are placed on top.At the end of the exposure time, the grease spots up to 1 mm in size, visible to the naked eye on the display paper within the defined test area, are evaluated. If only grease spots up to 1,0 mm are observed, the test is considered to have been passed; in the case of grease spots larger than 1,0 mm, the test has to be performed with a more moderate test condition (a "poorer" grease permeability group).


weathering test/ light fastness- exposure to laboratory light sources or artificial weathering/UV- test
DIN EN ISO 4892-2; with filtered xenon arc lamp, sample area max. 240 x 400 mm²); with water sprinkling (water spray) or dry. Also possible is the determination of light fastness, e.g. from printink inks or coloured materials, acc. DIN ISO 12040 bluescale (wool standard)/ fastness level 1-8.


Abrasion test of printings Dr. Ruf method
Determination of abrasion resistance of printings, laqcuers, etc. The test can be performed dry (as received), wet (after immersion in water) or after storage in liquid media/ filling goods respectively other pretreatments (sterilization, UV irradiation).


tensile- impact strength
DIN EN ISO 8256, method A, specimen type 2 and 3 available


Fat repellent impregnation of paper, lipophobic properties;Kit-Test
3M-Kit-test, classification of the fat impregnation of papers by wetting tests with solutions on basis of (castor-oil, n-heptane, toluene. If the resistance of plastic- coatings/ laquers, e.g. on paper, against fat penetration should be tested please select the method "penetrability of fat/ fat- proof test".


Shrinkage of PE-films (Betex- instrument)
In-house method with Betex tester Principle: On a heating plate, wetted with polyethylene glycol, a round specimen of plastic film with a diameter of 50 mm is placed. The shrinkage takes place while the specimen is free "swimming" in the hot Polyethylenglykole. Suitable e.g. for PE films, test parameters T = 150 ° C / t = 30 s, the shrinkage [%] is determined in machine and transversal direction.


storage test/ accelerated aging in explosion protected heating chamber (controlled temperature)
Storage tests with or without filling good for estimating the long-term stability of materials and packages. The storage tests, depending on the requirements, could be carried out in lab drying oven (convection), refrigerator, explosion-protected heating chamber (e.g. solvent-based media,T1- T3 max 105 °C;T 4 max. 70 °C), climate chamber (humidity and temperature controlled, temperature and humidity cycles possible). Please select the appropriate method to avoid unnecessary costs. To prepare an offer we need the following information: What type of packaging should be tested (size, filling volume)? How many packages should be stored? Are the packages empty or do they have to be emptied before testing? Which contents are involved (CAS no./ safety data sheet)? How long should the packages be stored? Under what ambient conditions should the packages be stored (temperature, controlled relative humidity)?


shrinkage stress determination of plastic films
Isothermal or dynamic measurement, temperature range 40-140°C; MD or TD including a measurement of the contraction force after cooling on the basis of ISO 14616


Impact resistance by instrumented puncture test
Dynamic test by free- falling dart tester, testing speed appr. 4,4 m/s, for simulation of impact stress, ISO 7765-2 (HIST- DIN 53373), similar to ISO 6603-2, also possible: Test of folded edges acc. "Fraunhofer Leaflet 6, part 2, page 2, folded edges"


storage test/ accelerated aging in climate chamber (controlled temperature and relative humidity)
Storage tests with or without filling good for estimating the long-term stability of materials and packages. The storage tests, depending on the requirements, could be carried out in lab drying oven (convection), refrigerator, explosion-protected heating chamber (e.g. solvent-based media,T1- T3 max 105 °C;T 4 max. 70 °C), climate chamber (humidity and temperature controlled, temperature and humidity cycles possible). Please select the appropriate method to avoid unnecessary costs. To prepare an offer we need the following information: What type of packaging should be tested (size, filling volume)? How many packages should be stored? Are the packages empty or do they have to be emptied before testing? Which contents are involved (CAS no./ safety data sheet)? How long should the packages be stored? Under what ambient conditions should the packages be stored (temperature, controlled relative humidity)?


Smoothness Bekk Method
Bekk's smoothness is a method for characterizing the surface topography of smooth paper or films with a roughened surface. The measuring principle is based on the fact that the surface to be characterized is placed on a flat glass plate with a hole. A vacuum is created over the bore, which sucks the sample surface onto the glass. The time for the vacuum decrease between 2 defined pressure points is measured. The method is not suitable for very rough and porous materials and very smooth plastic films.


Indentation hardness (Shore hardness)
Hardness test by means of a durometer for plastics and hard rubber (ebonite), possibly necessary sample preparation will be charged additionally. The thickness of the test specimens should be at least 4 mm, it can be used to obtain the necessary thickness can be composed of thinner layers. Determinations made on composite specimens may not be consistent with those made on one-piece specimens because the area between the layers may not be in full contact.


storage test/ accelerated aging in lab drying oven or refrigerator (controlled temperature)
Storage tests with or without filling good for estimating the long-term stability of materials and packages. The storage tests, depending on the requirements, could be carried out in lab drying oven (convection), refrigerator, explosion-protected heating chamber (e.g. solvent-based media,T1- T3 max 105 °C;T 4 max. 70 °C), climate chamber (humidity and temperature controlled, temperature and humidity cycles possible). Please select the appropriate method to avoid unnecessary costs. Tests by this method are common for accelerated assessment of material aging for long-term applications, also in terms of resistance against chemicals, foodstuffs or other filling goods. The assesment looks purely on technical aspects, for the assessment of compliance with food legislation is referred to relevant legal requuirements. Nevbermind, we strongly recommend parallel tests under real storage conditions to validate the meaningfulness of accelerated aging tests. To prepare an offer we need the following information: What type of packaging should be tested (size, filling volume)? How many packages should be stored? Are the packages empty or do they have to be emptied before testing? Which contents are involved (CAS no./ safety data sheet)? How long should the packages be stored? Under what ambient conditions should the packages be stored (temperature, controlled relative humidity)?


Determination of volume of flexible bags
The method is used to determine the volume of bags and sacks, feasible up to a maximum volume of 100l. The measuring principle is based on filling the bags with a plastic granulate (bulk density 500 - 600 kg/m³), weighing the bags and calculation of the volume.


tensile test paper, sealing strength of paper samples
paper DIN EN ISO 1924-2 determination of tensile strength, stretch at break,TEA (accredited test method) DIN EN 868-4 Anhang C, Measuring the seal strength of machine-made bags or sealed samples made of paper


Sterilisation/ pasteurization in laboratory autoclave
Maximum load 65 l, per run, with controlled counter pressure based on empirical value.


determination of weight
Method for determining the weight of sales units (VKE), rolls etc.. Depending on the required precision and mass, the weighing can be carried out with DKD-calibrated analytical balances, precision balances or flat balances in the range between 1 mg and 60 kg.


Compression test with cups, buckets and basins (temperature range -40 to +120 °C)
DIN EN ISO 12048 analogue; from unfilled cups, bowls, etc.; (filled packages with extra charge); determination of Fmax with v= 10 mm/min at first buckling of the specimen. Smaller packages (approx max 100 * 100 * 100 mm³) can be testet a temperature range from - 40 to +120° C also (additional charge!).


weathering test- wet smear resistance of printed peat culture substrate and humus packaging
Test for ink resistance against weathering incl. environmental influences such as moisture, sunlight (UV radiation) and possibly about ingredients materials eluted from the filling (eg humic acids, agricultural chemicals). For practical evaluation of the wet rub resistance of the printing and the weather resistance of the film materials itself in time-lapse test, with inclusion of the range safety film by artificial wheathering with xenon arc light in accordance with DIN EN ISO 4892-2.


tensile test paper wet strength
DIN ISO 3781 determination of wet breaking load after immersion in water, calculation of relative wet strength relating to initial strength of paper conditioned under standard climate.


Seal strength of peelable pouches, sacks, sealed packages under usage of package testing device
Test is performed as a technological practical test on sealed cups, trays, pouches etc. with a defined peel angle and testing speed by usage of Zwick- Fixture.


Creep- Test
Creep Test at plastic films acc. DIN EN 13206, DIN 55445 T 2,for exampleT= 23- 80 °C, sample width 10- 20 mm, testing period as agreed, testing weight as agreed


Anti Fogging Test
Examination of transparent films or packages for antifogging properties, as cold fog (storage in refrigerator T = 6° C) and/or hot fog (filling with hot tap water T = 60° C and storage at T = 23° C). The bedewing of the sample is constrained by falling below the dew point, assessed visually and photographically documented.


stretch hood- and stretch wrap films- characterization by hysteresis tensile test (only in stretching direction, e.g generally in TD)
Stretch hood tubular films, while processed, are cut, sealed and stretched in transverse direction, so that they can be put over a packed pallet contactless. The film then is relieved and due to the viscoelastic restoring forces of the material resulting a slight tension, the film lays closely spaced to the load on. Since the standard tensile test is not suitable for testing the special properties of these products, we have developed this laboratory test, which follows the most important basic points of the stretch hood process under reproducible conditions. This hysteresis tensile test may be used for material comparisons and for specifying appropriate types of film. Also suitable for wrapping stretch film, which are however normally tested longitudinally.


printing ink adhesion (tesa test)
Self-adhesive tape test (tesa test), Sun Chemical-Hartmann_PV-Nr.1 or ASTM F 2252


Unpacking barness of cups (hollow articles)
Unpacking barness test of cups by examination of the resistance against stacking together at constant load Fmax; determination of the number of cups stacking together.


wrinkle resistance of printings or coatings- dry or after immersion in water
The test may be carried out on printings, coatings on flexible substrates such as films, foils or paper. In addition to an examination after immersion in water of course the test is also possible after storage in filling goods, after UV irradiation or mechanical stress.


Curvature of films
This method is used for measuring the curvature of a lay flat film based on the longitudinal direction. This so-called sheet travel can e.g. be the result of a aslope bubble while blow- film extrusion prozess. The film tends then as to lobed edges of the reel or wrinkling during laminating. We will send you on request our SOP.


Blocking test/ blocking strength
Test of the blocking tendency of plane packaging materials, in dependence of temperature T [°C], pressure p [MPa] and time t [h]. The evaluation is carried out either by manual test or by determination of blocking force Fmax [N] by shear test with tensile tester. If the sample should by tested under several test conditions separately, please create multiple tests for each test parameter setting.


drop test of sacks and bags EN 13592
drop test of pouches resp. sacks or tie- band sacks, strength of closure per test load, standard n = 10 (testing of n= 30 bags: extra charge)


shear strength of glued seams (temperature range -40 to +120 °C)
5 pieces of 15 mm wide strips are taken from the seam and tested in a tensile tester under shear stress. The maximum force to fracture of the seam is determined.


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Your contact person

Matthias Böhne +49 441 94986-11
matthias.boehne@innoform.de

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