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.

Thursday, December 15, 2016

Leather Maintenance(2)

Third, leather care instructions:

1, ordinary leather The first layer of skin is the animal skin, good elasticity, fiber tight, you can see the skin injury, knife injury or toothpick marks, and leather itself pores, blood tendons and veins. The first layer of skin without treatment, the top tight, the following more loose, a transition due to leather processing dyeing staining, so the use of a period of time, especially the lighter color of the leather surface, there will be slight decolorization and wear skin, is a normal phenomenon .

2,patent leather: the surface is coated with high brightness light paint or crystal paint, gloss, leather surface firm, uniform color, suitable for the manufacture of popular fashion leather. High water resistance, no air permeability. Due to finishing heavy, cover strong, and more use of the first layer of defects and more skin production. Maintenance methods: the patent leather scratch is difficult to repair, try to avoid the use of hard objects, gravel scratches, wipe with a soft towel, not in the sun exposure or roasted, in order to prevent the leather surface hard, available colorless Care oil care, and wipe clean with a clean cloth back and forth, so as to maintain the original luster.



3, oil skin: When scratched with a fingernail when the surface will appear anti-white phenomenon. After hand rubbing will return to primary colors. This skin type oily, moist, thick but not hard, shiny. The first layer, there are two. Cleaning method: put a small amount of cotton on the leather oil, wipe evenly. Maintenance and precautions: pay attention to waterproof, anti-grease, try to avoid scratches with hard objects collision, resulting in cortical injury will not be able to recover. Oily heavy leather adhesive effect is poor, easy to open plastic. Can be used for maintenance of skin oil, such as Bili beads, varnish and the like.

4, water leather, waxing leather: test method: water dyed leather, waxing the surface without any decoration, just dyeing only, after polishing the surface of striae clear, three-dimensional sense of strong, smooth feel. Water dip leather surface, a significant wet India, the skin surface water. Cleaning method: in the cleaning process, can not use oil-based agent, the best rub with an eraser. Care and precautions: Water dyed leather, waxing leather is uncoated leather, easy to absorb moisture and stains, color is more prominent, the use should pay attention to avoid water or other stains, avoid contact with oil, not Rain, when not wipe the dust, keep the leather surface brightness, to prevent mildew.


5, wrinkled skin test method: the texture of the skin is more natural, a rough fine, feel better, through the wrestling machine is made of many beat processing. Cleaning method: easy to clean, with the general skin oil can be cleaned. Maintenance and Note: When not in use, it is best to hang up; if flat, to put on the surface, to avoid crushing wrinkles by other items, affecting the appearance.

Tuesday, December 13, 2016

Leather Maintenance(1)

First,the daily maintenance
(1). weekly use of  leather care solution for maintenance and care;
(2). Clean the leather with a soft cotton and leather wax wipe clean, so that will not hurt the leather, leather goods are not directly on the water where cleaning.
(3). To avoid the leather by a long exposure, rain;
(4). Avoid contact with acids, alkaline substances, corrosive substances, oil;
(5). Avoid sharp contact with hard objects or friction;
(6). To prevent overloading, overloading;
(7). When the leather damp, subject to moisture should be immediately dried, or dried with warm air;
(8). When the leather for long-term collection, the leather should be placed in the damp-proof agent, and plastic bags sealed in cold places.



Second,Matters needing attention
1, when used to prevent the following: rain soaking, moist storage, prolonged sun exposure, 70 ℃ above the high temperature, not directly with the rough material friction, avoid contact with acid and other corrosive substances.
2, how to deal with wet or wet leather with newspapers according to the original shape of propped up leather goods, in the sun to avoid ventilation drying, with leather oil leather; not near the high temperature, avoid drying or exposure to fire .
3, the leather surface scratches: spray skin care oil, natural air-dried. Cover the surface with a dry cloth, hair dryer heated 30-60 seconds after repeated friction with a dry cloth.
4, leather torn and damaged, it should be timely repair. If a small crack, can be coated in the cracks at the egg white, cracks can be bonded.
5, leather mildew how to use soft dry cloth to wipe the moldy part of the wipe clean, and then wipe the skin evenly. Must not be wiped with water and gasoline, water can make leather harden, gasoline can make leather oil volatile and chapped.

to be continued

Monday, December 5, 2016

Skin care of the bag care techniques

    As the standard of living materials continues to increase, material requirements will also increase, and bags are essential in daily life as daily necessities as well as for women. So for your beloved leather care methods and techniques, you know how much?

(1) If there is dust on the glitter leather, you can first use a soft cloth to wipe the surface of leather dust.

(2) To the surface of the package coated with a layer of care agent, so that the leather will be the most effective care to make the package to restore the appearance of beautiful, shiny, soft, waterproof, mechanical strength (such as tensile strength, tear strength, Grain crack strength, etc.) can be increased. To better protect the surface texture of the leather bag.

(3) When natural care agent after drying, professional leather cleaning agent shaken, with a soft texture of the cloth, gently wipe.

(4) A small area of ​​pollution, direct spray cleaner on the surface of the bag. Large areas of pollution, the detergent can be poured from the bottle, installed in the container, with a soft brush stained with detergent, directly applied to the skin surface. Stay for about 2 to 5 minutes, with a soft brush to brush, to dirt off, be sure to wipe the surface texture along the skin, if the gap, to follow the gap wipe.

(5) If it is a long time stains, leather surface dirt thickness of the larger, will penetrate into the skin texture. Leather simulation leather oil, because it is oil, poor permeability, cleaning effect is not ideal, can be diluted with water by adding 10% of the water, shake and then use. Water can help skin simulation leather oil cleaner penetration, cleaning effect is good, clean and efficient, this will not hurt the bag surface, because the dermis itself has a certain moisture content, the animal itself is higher than 10% moisture content.

For the season, don't need to use the bag, you can put in a cool dry place, coated with a layer of leather protective agent, you can plug some paper filler to prevent deformation of the bag, you can place some moisture agent, insecticide in a dust bag.

Tuesday, November 22, 2016

How to Identify Leather Care Agent


 1. leather care agent must be grease
   
When the temperature reaches 450 ~ 750 degrees, with the help of combustible materials, can fire burning, so you can use the combustion test, that is, the use of oil, Put a small amount of care agent evenly on the toilet paper, placed in the mosquito-repellent rack, the first lit toilet paper, burn to care agent, the care agent can fire.




2.with the appropriate penetration and adhesion
    
High-quality leather care agent, can evenly penetrate the various parts of the leather inside the fiber surface, and with the intradermal fiber well together, and the wax and dermal fibers within the combination of poor, but also due to low wax burning, easy to volatile , So the wax into the leather will soon be lost, because of its loss will also take away the leather within the original oil, the leather becomes more hard, more brittle, and the wax will plug the hairy eye, so pure wax is not appropriate For the care of dermis.





3. PH value with pH detection
   
If the pH value of leather care agent PH value is greater than 7, it was alkaline, it infiltrated the skin, destruction of intradermal skin surface between the original oil film, and wash off these intradermal fat, so that the leather between the internal fiber surface Fiber bonds to each other, the friction becomes larger, but also corrosive dermal fiber, leather hardening, brittle, or even cracking - alkaline damage to the dermis is here, that is, alkaline detergent, clean leather, infiltration Dermal internal alkaline substances, will destroy the internal structure of the dermis, especially intradermal fiber surface of the oil film, so that leather harden, brittle, and even cracking. Therefore, in addition to skin simulated leather oil cleanser, the skin care can not use detergent.
Leather care agent qualified pH = 5 ~ 7 between. PH value of the test paper in the general chemical teaching store for sale.


Wednesday, November 16, 2016

Leather shoes toe is easy to fray, clever clever repair

Most people will choose to buy leather shoes , because it not only wear a dignified appearance with gas field, and easy to care, but if the shiny shoes were worn, and that the more distressed ah, not only affect the overall appearance, but also affect Shoes, life, then me will teach you how to restore shoes.

Nail polish
Wearing nail polish on the shoes wear, and then on the shoe polish, so you do not see there is wear and tear.


Put egg white
If the skin is still worn off, then you can use egg repair, with a cotton swab dipped in a little egg white, wear a thin layer of the place, and then cover the skin and wear in the friction, so that egg coagulation and Stick, and finally can play shoe polish.

Tu speed adhesive
If the shoes were scratched, it is necessary to use quick-drying glue, and first with a quick-drying glue evenly coated on both sides of the gap, and then pressed by hand, glue dry and then coated with wax, iron ironing, and then coated On the same color leather wipe light pulp, wait until the dry after the shoe polish can be marked.



Pad leather
Choose a piece of leather the same color, in the back of the leather coated with special glue, stick in the wear, with a piece of cloth pressure is good, so that the leather completely stuck, the last shoe can.

Rub the cream

In the wear at the professional fill color paste, and then evenly spread can be, so you can restore the original shiny it!