introducere
ISO (Organizația Internațională pentru Standardizare) este o alianță globală a organismelor naționale de standardizare (organismele membre ISO). Elaborarea standardelor internaționale se realizează de obicei prin intermediul comitetelor tehnice ISO. Fiecare instituție membră interesată de un subiect pe care a fost înființat un comitet tehnic are dreptul de a fi reprezentată în respectivul comitet. Organizațiile internaționale guvernamentale și neguvernamentale care au legătură cu ISO sunt, de asemenea, implicate în această activitate. ISO lucrează îndeaproape cu Comisia Electrotehnică Internațională (IEC) în toate problemele de standardizare electrică.

Standardele internaționale sunt elaborate în conformitate cu regulile prevăzute în partea 3 din Directiva ISO/IEC.

Proiectul standardului internațional adoptat de Comitetul Tehnic va fi transmis organelor membre pentru vot. Publicarea ca standard internațional necesită aprobarea de cel puțin 75% a instituţiilor membre.

Please note that some elements of this part of ISO 6603 Poate face obiectul unui drept de brevet. ISO nu este responsabil pentru identificarea unuia sau a tuturor acestor brevete.

Standardul internațional ISO 6603-1 was developed by the Technical Committee ISO/TC61, Materiale plastice, Subcomisia SC 2, Mechanical Properties.

ISO 6603-1-2000 “Materiale plastice – Determinarea comportamentului la impact la perforare a materialelor plastice rigide – Parte 1: Testare de impact non-instrumentală”

A doua ediție anulează și înlocuiește prima ediție revizuită tehnic (ISO 6603-1:1985).

ISO 6603 constă din următoarele părți, under the general heading Plastics – Determinarea comportamentului la impact la perforare a materialelor plastice rigide:

– Parte 1: Testare de impact non-instrumentală

– Parte 2: Instrumented impact testing

Appendix A of this part of ISO 6603 is for information purposes only.

1 Gamă
This standard specifies a method for determining, under specified conditions, the puncture impact properties of rigid plastics in the form of flat specimens, such as disks or squares. The sample can be molded directly, cut from the sheet or removed from the finished product. Different types of samples and test conditions are defined.

ISO 6603-1-2000 “Materiale plastice – Determinarea comportamentului la impact la perforare a materialelor plastice rigide – Parte 1: Testare de impact non-instrumentală”

These drop dart methods are used to study the behavior of plastic films or molds under the impact of a firing pin perpendicular to the specimen plane.

Această parte a ISO 6603 can be used if it is sufficient to characterize the impact behavior of plastics by an impact failure energy threshold based on many samples. If a force-deflection or force-time plot recorded at a nominal constant firing pin speed is necessary to characterize impact behavior in detail, ISO 6603-2 is used.

These test methods are suitable for specimens with thicknesses between 1 mm and 4 mm.

Note For thicknesses less than 1 mm, ISO 7765 is recommended. If the equipment is suitable, it is possible to test thicknesses greater than 4 mm, but this test falls outside the scope of ISO 6603-1 și ISO 6603-2.

These methods are suitable for the following types of materials:

Rigid thermoplastic molding and extrusion materials, including filled, unfilled and reinforced compounds and sheets;

– Rigid thermosetting molding and extrusion materials, including filling and reinforcing compounds, sheets and laminates;

ISO 6603-1-2000 “Materiale plastice – Determinarea comportamentului la impact la perforare a materialelor plastice rigide – Parte 1: Testare de impact non-instrumentală”

Fiber-reinforced thermoset and thermoplastic composites, including unidirectional or non-unidirectional reinforcement materials, such as MATS, Țesături, woven roving, cut strands, combined and mixed reinforcement materials, roving, milled fibers and sheets made from pre-impregnated materials (prepregs).

These methods are also applicable to samples molded or machined from finished products, laminates and extruded or cast plates.

The test results are comparable only when the preparation conditions, size and surface of the sample and the test conditions are the same. În special, the results determined on specimens of different thicknesses cannot be compared with each other (see Appendix E: – to ISO 6603-2). A comprehensive assessment of the impact stress response requires measurement of the impact velocity and temperature of different material variables, such as crystallinity and moisture content.

The impact behavior of the finished product cannot be predicted directly from this test, but samples can be taken from the finished product (see above) for testing by these methods.

Test data developed through these methods should not be used in design calculations. in orice caz, information on the typical behaviour of the material can be obtained by testing at different temperatures and impact velocities (see Annex D of ISO 6603-2: -), varying thickness (see Annex E of ISO 6603-2: -) and testing samples prepared under different conditions.

Această parte a ISO 6603 describes two statistical test methods:

– Metoda A: Staircase Method (Individual) (preferred)

In this method, a uniform energy increment is used during the test. After testing each sample, the energy is reduced or increased by uniform increments, depending on the observations (pass or fail) of the previous test.

ISO 6603-1-2000 “Materiale plastice – Determinarea comportamentului la impact la perforare a materialelor plastice rigide – Parte 1: Testare de impact non-instrumentală”

– Metoda B: Group method (Opțional)

In this method, a continuous group of at least ten samples is tested. The impact failure energy is calculated statistically.

2 referințe normative
The following normative documents contain provisions that, by reference herein, constitute the provisions of this part of ISO 6603. Pentru referințe datate, any subsequent revisions or amendments to these publications will not apply. in orice caz, Parties to agreements based on this part of ISO 6603 sunt încurajați să investigheze posibilitatea aplicării unor noi versiuni ale următoarelor documente normative. Pentru referințe nedatate, a new version of the standard-setting document referred to applies. Membrii ISO și IEC țin un registru al standardelor internaționale valabile în prezent.

ISO 291:1997, Materiale plastice. Adjust and test the standard atmosphere.

ISO 293:1986, Materiale plastice. Compression forming sample of thermoplastic material.

ISO 294-3:1996, Materiale plastice. Injection molding of thermoplastic material samples. Parte 3: Small board.

ISO 295:1991, Materiale plastice. Compression molding of thermosetting material samples.

ISO 1268:19741), Materiale plastice – Preparation of glass fiber reinforced, resin bonded, low pressure laminates or panels for test purposes.

ISO 2818:1994, Materiale plastice. The sample was prepared by machining.

ISO 7765-1:1988, folii și foi de plastic. The impact resistance was determined by the free falling dart method. Parte 1: Staircase method.

ISO 7765-2:1994, folii și foi de plastic. The impact resistance was determined by the free fall dart method. Parte 2: Instrumental puncture test.

ISO 6603-1-2000 “Materiale plastice – Determinarea comportamentului la impact la perforare a materialelor plastice rigide – Parte 1: Testare de impact non-instrumentală”

3 Termeni și definiții
For the purposes of this part of ISO 6603, se aplică următorii termeni și definiții:

3.1 Prezentare generală

3.1.1 Failure

Any visible breakage of the specimen surface

3.2 Failure standard terms

3.2.1 Crack

Any cracks that are visible to the naked eye and cannot penetrate the entire thickness of the material

See: Figure 1

3.2.2 Broken

Any cracks throughout the entire thickness of the material

See: Figure 2

3.2.3 Penetration

Failure of the firing pin to penetrate the entire thickness of the specimen

See: Figure 3 b)

3.2.4 Grinding

Break the sample into two or more pieces

See: Figure 3 A)

3.3 Impact failure items
3.3.150 % impact failure energy E50

The energy that causes 50% of the sample to fail, as defined in 3.1.1

3.3.250 % impact failure mass M50

The mass that causes 50% of the sample to fail at a given fall height, as defined in 3.1.1

3.3.350 % impact failure mass H50

50% impact failure height H50 uses the height at which a given falling mass causes 50% sample failure, as defined in 3.1.1

Figure 1 – Specimen sections damaged by “cracks” [b) and c) after bending by hand

ISO 6603-1-2000 “Materiale plastice – Determinarea comportamentului la impact la perforare a materialelor plastice rigide – Parte 1: Testare de impact non-instrumentală”

Figure 2 – Slices passed through the specimen are damaged by “breakage” [b) and c) after bending by hand

Figure 3 – Examples of “broken” failures [A) și “penetrated” [b)

A)

b)

Doar secțiunea de informații standard este publică. Pentru a vedea conținutul complet, trebuie să achiziționați standardul prin canalele oficiale.