увод
ИСО (Међународна организација за стандардизацију) је глобална федерација националних тела за стандардизацију (Тела чланица ИСО). Развој међународних стандарда се обично спроводи преко ИСО техничких комитета. Свака група чланова заинтересована за предмет за који је формиран технички комитет има право да буде заступљена у комисији. Међународне организације, владе и невладине организације у контакту са ИСО такође су укључене у овај посао. ИСО блиско сарађује са Међународном електротехничком комисијом (ИЕЦ) о свим питањима електричне стандардизације.

Нацрт међународног стандарда који је усвојио Технички комитет биће прослеђен телима чланицама на гласање. Публикација као међународни стандард захтева одобрење са најмање гласова 75% органа чланица.

Међународни стандард ИСО 8780-6 was developed by the ISO/TC 35 Technical Committee on Paints and Varnishes.

ИСО 8780 consists of the following sections, under the general heading Pigments and increments – Dispersion methods for assessing dispersion properties:

ИСО 8780-6-1990 “Dispersion methods for evaluating dispersion properties of pigments and fillers – Парт 6: Dispersion using a three-roll mill”

– Парт 1: Увод

– Парт 2: Dispersion using oscillators

– Парт 3: Dispersion of grinding using high-speed impellers

– Парт 4: Dispersion using a bead mill

– Парт 5: Дисперзија помоћу аутоматске млевене машине

– Парт 6: Dispersion using a three-roll grinder

Appendix A forms an integral part of this part of ISO 8780.

1 Обим примене
Овај део ИСО-а 8780 specifies a method for dispersing pigments and increments using a three-roll grinder. The results allow conclusions to be drawn about the behavior of the test product when dispersed using the corresponding production machine. Овај део ИСО-а 8780 is used in conjunction with the evaluation methods described in ISO 8781, using an agreed system of high viscosity adhesives that do not contain volatile substances. It should be read together with ISO 8780-1.

This method is limited to high viscosity abrasives. In order to improve the precision of the method, it is suggested that the dispersion procedure of the test pigment and the conventional reference pigment should be carried out at the same temperature.

ИСО 8780-6-1990 “Dispersion methods for evaluating dispersion properties of pigments and fillers – Парт 6: Dispersion using a three-roll mill”

The results obtained are not suitable for comparison with the dispersion results obtained using other dispersion methods.

Белешка 1 The advantages of the three-high mill described in this section of ISO 8780 are ease of handling the equipment, the ability to prepare a sufficient amount of abrasive for a wide range of evaluation procedures, ease of cleaning and the possibility of associated results with the results of the production machinery. Unlike dispersion equipment used for low-viscosity abrasive formulations, three-roll grinders such as those described in this part of ISO 8780 allow processing of a wide range of high-viscosity abrasive formulations. Because of this greater flexibility, it is not necessary to precisely specify the appropriate color paste formula.

ИСО 8780-6-1990 “Dispersion methods for evaluating dispersion properties of pigments and fillers – Парт 6: Dispersion using a three-roll mill”

2 Нормативни референтни документи
The following standards contain provisions which, by reference herein, constitute the provisions of this part of ISO 8780. At the time of publication, the version shown is valid. All standards are subject to revision and parties to agreements based on this part of ISO 8780 are encouraged to investigate the possibility of applying new versions of the following standards. IEC and ISO members maintain a register of currently valid international standards.

ИСО 787-24:1985, General test methods for pigments and increments – Парт 24: Determination of the relative tinting force of coloured pigments and the relative scattering force of white pigments – Photometric method.

ИСО 842:1984, Raw materials for paints and varnishes – Sampling.

ИСО 1524:1983, Боје и лакови – Determination of fineness of grinding.

ИСО 8780-1:1990, pigments and increments – Dispersion methods for the assessment of dispersion properties – Парт 1: Увод.

ИСО 8780-6-1990 “Dispersion methods for evaluating dispersion properties of pigments and fillers – Парт 6: Dispersion using a three-roll mill”

ИСО 8781-1:1990, pigments and increments – Methods for assessing dispersion properties – Парт 1: Assessment against changes in tint strength of coloured pigments.

ИСО 8781-2:1990, pigments and increments – Methods for assessing dispersion properties – Парт 2: Assessment against changes in grinding fineness.

ИСО 8781-3:1990 Pigments and increments – Methods for assessing dispersion properties – Парт 3: Assessment from changes in gloss.

Јаван је само одељак са стандардним информацијама. Да бисте видели цео садржај, морате купити стандард преко званичних канала.