LOGIN      中文版

Headquarters: Haiwei Section of Guangzhu Highway, Shunde District, Foshan, Guangdong,China
Sales Tel:+86-757-28392207
Fax:+86-0757-28396980
E-mail:lizs@dymatic.com
Technology Service:+86-0757-28399088-185
Fax:+86-0757-28373883
E-mail:yanlan@dymatic.com

Your present location:Home >> Technical knowledge >> Technology lectures >> Detection And Influence Factors For Fogging Value Of Automotive Leather

Detection And Influence Factors For Fogging Value Of Automotive Leather

Date:2016-3-29

1.Detection for fogging value of automotive leather, the introduction of ISO 6452 Tester.

Fogging value tester is generally used for evaluation of volatile substance evaporation of the automotive and aircraft upholstery under high temperature, such as plastic parts, PU, textile, leather, adhesives, non-woven fabric and thermal plasticity elastomer. Fogging value tester also can be used for the determination of high temperature fogging of car xenon lamp.

(1)Characteristic of ISO 6452 Tester.

Six test space, sample test and blank test can be conducted at the same time.

Stable working, accurate test.

High accuracy temperature control.

(2)Principle of ISO 6452 Tester.

Samples are heated in fogging beaker and begin to evaporate, then condensate on the cold glass pane or aluminum foil. After condensation, measure the fogging value or weight of condensation substance on glass pane or aluminum foil, which will be compared with the corresponding value before condensation, to obtain the fogging value of the samples.

(3)Measuring method of ISO 6452 Tester.

Gloss: Samples are heated in fogging beaker and evaporate, then condensate on the cold glass pane, compare the gloss value of glass pane before and after condensation, calculate the fogging value of samples.

Haze: Samples are heated in fogging beaker and evaporate, then condensate on the cold glass pane, compare the haze value of glass pane before and after condensation, calculate the fogging value of samples.

Weight: Samples are heated in fogging beaker and evaporate, then condensate on the cold aluminum foil, measure and compare the weight of aluminum foil before and after condensation, obtain the weight of fogging coagulum of samples.

(4)Test standards of ISO 6452 Tester.

DIN 75201、ISO 6452、SAE J1756、QB/T 2728、BS EN 14288、PV 3920、PV 3015、ES-X83231、NES M0161、D45 1727、GM 9305P、TSM 0503G

 

2.Influence factors for fogging value of leather crust.

(1) Wet blue or wet white: neutral salts, small molecular bactericide, degreasing agents and deliming agents existing in wet blue or wet white show negative effect on fogging value. Therefore, the wet blue or wet white for automotive leather should be washed at 45-55℃ before the subsequent process.

(2) Fatliquors: fatliquors contains mineral oils, small molecular grease by-products, impurity, neutral oils, inertia oils and external emulsifiers will badly influencefogging value, so should not be used. The products TJFAT F214, TJFAT F210, TJFAT F1200 of Tingjiang New Material, Inc. do not contain the substances above, so they are recommended to be used for automotive leather.

(3) Dyestuff:  the neutral salts existing in dyestuff will badly influence fogging value.

(4) Retanning agents: generally, retanning agents show less effect on fogging value.

(5) Other chemicals: show less effect on fogging value.

When determine the fogging value of solo dyestuff, fatliquor or retanning agent, the corresponding wet blue or wet white should be introduced as blank sample. For finished leather, crust should be introduced as blank sample.

 

3.Requirements of automotive upholstery leather.

The mainly products used in wet-end process for automotive upholstery leather are fatliquors, TARA extracts and dispersing syntan.

The requirements of finished automotive upholstery leather: softness, heat /light fastness, aging resistance, fogging value, leveling performance, uniform and bright color, well penetrated dyestuff, fullness, dimensional stability, good strength, good finishing ability, eco-friendly.

TypeInfo: Technology lectures

Keywords for the information:

error