Introduction To Dyeing Methods And Precautions Of Garment Coatings
General, coating It is dispersed into particles of 1 micron in size, and about 108 moles of pigment molecules contained in one particle are all attached to the fiber. The dye is dyed with 1 mole of molecular unit (several moles of association state according to different situations), so we can understand the difference between paint and dye here.
The coating does not have the ability to diffuse to the inside of the fiber, so it is physically attached to the fiber surface. It is fixed on the fiber surface by using the resin component called adhesive. If the adhesive is used to make it completely fixed on the fiber surface, the pigment will not fall off easily and the color fastness will be good. However, due to the influence of the resin contained in the adhesive, there is a disadvantage that the hand feels hard.
Pigment printing or pigment pad dyeing is to force the coating to physically adhere to the fiber surface. As the adhesive is used for fixation, even if the coating itself has no affinity for the fiber, it can also be dyed. The paint must be firmly fixed on the fiber surface when using the absorption method for dyeing clothing paint.
When exhaustion dyeing is used, cationic polymers are attached to the fiber surface in the pretreatment process (for example, compounds used as dye fixatives and the like). Generally, coatings are dispersed by anionic interfacial activator, and the coatings are absorbed by the fiber surface through the ionic combination of the cationic group of the pretreatment agent and the anionic group of the anionic activator on the coating surface.
This is not the combination of coating and fiber, so it is not firm. After the coating is adsorbed, the resin is adsorbed on the fiber, and the coating on the fiber surface is bonded with the fiber through the resin. The dyeing process is as follows:
[Example of paint dyeing process] Degumming → hot water washing → cationic agent pretreatment (60~70 ℃ × 20~30min) → paint dyeing (70~100 ℃ × 30min) → adhesive exhaustion (30~60 ℃) → drying? Curing (adhesive fixation, 90~130 ℃ × 10min) (recently, the surface was positive, and new coating products that can be exempted from pretreatment have appeared)
In the above Dyeing method The main pigments used in are the paints with the following chemical structures. Compared with ordinary dyes, the color itself has excellent fastness
Yellow: Acetoacetate aniline yellow paint
Red: azo paint
Blue green: phthalocyanine paint
Black: carbon black paint
White: titanium white paint. However, the above dyeing method is to use adhesives to combine fibers without affinity with pigments. For this reason, color fastness is related to the bonding degree of adhesive based coatings and fibers.
Generally, in pigment printing, the pigment is fixed to the printing part by a large amount of adhesive, so it feels hard, but the fastness is good.
There are many cases in which a large amount of adhesive should not be used in the suction method. For example, due to the great importance attached to hand feel and popularity during garment pigment dyeing, the dosage of adhesive needs to be reduced, so the following problems often occur in color fastness:
·Light fastness (discoloration), fading (caused by incomplete combination of paint, coagulation, migration, etc.)
·Rubbing fastness (wet), abrasion pollution (caused by incomplete dye binding on the coating surface)
·Washing resistance, color shedding (caused by solvent resistance of adhesive) Textile It is common that the color fastness does not meet the standard. It is necessary to develop new products after fully mastering these conditions.
- Related reading
Study On The Technology Of High Molecular Compound Textile Artificial Blood Vessel
|- Guangdong | Investment Promotion: Textile And Clothing Industry In Chaoyang District Of Shantou Accelerates Towards 100 Billion Cluster
- Technology Extension | New Material: New Cellulose Based Solar Thermal Conversion Material
- Local hotspot | Industrial Cluster: School Enterprise Cooperation Helps The High-Quality Development Of Dalang Knitting Industry
- Popular color | Popular Colors: The Trend Of Popular Colors In Spring And Summer This Year Has Been Known
- Bullshit | Supreme'S Latest Box Logo Sweater Design
- Listed company | Jiangsu Sunshine (600220): Gao Qinghua Was Appointed As The General Manager, Lu Yu As The Chairman And Legal Person
- Market topics | Securities Trader Report: China'S Leading Apparel Enterprises Showed A Significant Growth Trend In February
- Chamber of Commerce | Association Trends: Hebei Textile And Clothing Industry Association Is Eager To Learn The Spirit Of The Two Sessions
- Bullshit | Enjoy The ITOGO Shoe Design Of Y-3 New Shoes
- Instant news | Ministry Of Industry And Information Technology: 2023 Application For SME Characteristic Industrial Clusters Begins
- Analysis On The Skills Of Clothing Color Matching Display
- How To Wear It To Make Your Yellow Skin Instantly White
- Oriental Aura Of Chinese Supermodels At Milan Fashion Week
- Moving Forward In The Era Of Fashion That Controls Terminals
- A Tailor With A Price Of Ten Billion Is Not Good Enough.
- Semir Joined Huarun To Enter Commercial Real Estate
- The Success Of The Conch Apparel General Manager
- Interview With MS. Xia Hua, Chairman Of The Yiwen Group
- Interview With Qu Jing, Secretary General Of China Knitting Industry Association
- Zhou Shiyong, Principal Of Shenzhen Clothing Industry Training School