Sunday, March 12, 2017

The Application and Development Direction of PU Interior Leather(1)

With the rapid development of PU synthetic leather technology and the EU will soon limit the use of PVC automotive leather, the current international brand of some new models have begun to gradually use the PU leather, and tend to high physical PU leather. The PU synthetic leather research and application closely follow the international trend of technology, starting early, high starting point, the rapid pace of development, has become the world's PU synthetic leather center.

In the automotive industry has been included in China's pillar industry background, the development of the automotive industry to China's automotive interior parts industry and synthetic leather and other related industries to bring prosperity, with the localization rate of the car and the car interior features, environmental protection And other requirements, to replace imported products, improve the grade and quality of automotive interior leather to accelerate the PU synthetic leather in the automotive interior R & D applications, the domestic synthetic leather production enterprises an important opportunity for development.



Dry PU car interior leather
Dry PU synthetic leather processing is the fabric surface coated with a layer of PU resin solution. In order to improve the bonding strength with the fabric, you can use two-component adhesive layer resin; the same time in the process can also be pre-foam or by adding surfactants and other methods, the formation of microporous fabric surface of the polymer layer , Thereby providing a breathable microporosity similar to the wet process. Because of its low price, feel and good physical properties, more widely used in cars and hand cushion.

Wear-resistant, durable scraping PU leather
At present, the strength of the domestic PU synthetic leather production enterprises to actively develop the application of new functional PU resin slurry, with excellent feel and excellent properties of the base fabric, after special processing and finishing, the development of new automotive interior with Wet synthetic PU leather. Compared with traditional materials, this new material has more excellent mechanical properties, hydrolysis resistance, heat resistance, oxidation resistance and wear resistance, has been widely used in automotive stalls handrails, seats, door panels, etc. aspect.
In particular, the research and development of high wear-resistant, high durability polyurethane synthetic leather with strong sense of leather, soft, flexible, luxurious appearance, natural luster and so on.

to be continued

Tuesday, February 21, 2017

Leather Cleaning Methods

Leather to the following example:
Leather washing by washing in different ways, divided into machine wash and hand wash two; according to the different nature of washing, dry cleaning and wet cleaning into two categories. Machine washing is mainly through the leather dry cleaning machines for cleaning, hand washing will need to use washing tools and washing techniques for cleaning. Machine wash usually use tetrachlorethylene solvent (also oil and fluorine solvent), low-temperature immersion, due to machine wash by many laundry equipment condition control, at present our country, small laundry mostly manual cleaning. The following brief some manual cleaning practical methods, for reference only. 
The main washing tools: short hair brush, brown hair brush, sponge, plastic cleaning balls, towels, cotton balls, washbasin, wash case, air spray gun, portrait gas mode. In this case,
In this case,
The main washing materials: gasoline, methanol (alcohol), tetrachlorethylene, hydroxide (ammonia), detergent, liquid soap, hydrogen peroxide (hydrogen peroxide), sodium chloride (salt), alum, sodium sulfate ), Vinegar and other fine.
First
smooth leather cleaning
1. Small area of ​​oil treatment
Washing solvent:> 90 # gasoline or tetrachlorethylene. In this case,
Washing method: the leather shop in the wash case, with a sponge or cotton ball dipped in the amount of solvent on the leather parts of the oil scrub, oil removal, with a towel dipped in 40-50 degrees Celsius hot water on the scrubbing parts of micro-processing, set Ventilation shade to dry. 
2. Large area of ​​oil treatment
Washing solution:
A solution: 95% alcohol, 25% ammonia, the ratio of 1: 1
B solution: 25% ammonia, softener, water, the ratio of 1: 1: 1
Washing method: the leather tile on the wash case, with a short brush dipped in A solution to scrub the way pre-wash, while scrubbing with a towel to scrub, adsorption dirt and dirty fluid, oil removal, dipped in B liquid secondary cleaning (Ibid.), Towel net surface, set the ventilation shade to dry.
3. Skin color shade old processing
Washing solution:
A liquid: detergent, water, the ratio of 1: 400 concentration of 0.25% - 0.3%, water temperature 35-40 ℃
B liquid: brightener, smooth agent, water, the ratio of 1: 1: 4

Washing method: the leather tile in the wash case, with a brown brush dipped in A liquid gently scrub, while scrubbing side with a towel wipe clean, remove the oil, with a sponge impregnated B liquid to scrub the way the soft surface treatment, Put it aside for 15 minutes, the net surface of the towel, home ventilation and cool place to dry. 4. Leather surface denitrification hardening treatment
Washing solution:
A: liquid, salt, water, the ratio of 1: 1: 2 (dissolved mixed preparation); common amount: 250 grams of salt, 250 grams of salt, 55 grams of soft water. 
B liquid: fatliquor (water) slip agent, softener, water, the ratio of 1: 2: 2: 10, water temperature 40-45 degrees Celsius.
Liquid C: formaldehyde, water, the ratio of 1: 8 or 1:10.

Washing method: the leather tile on the wash case, with a brown brush dipped in A solution repeatedly brushing leather so that it fully penetrate the leather, put it aside for 30 minutes, with a plastic cleaning ball dipped in B liquid repeatedly scrub leather surface, standing 15 Minute, the net surface of the towel, the leather sets in portrait gas mode, with the spray gun to C liquid evenly atomized to the leather, home ventilation cool place to dry.