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Black technology coming! [printing and dyeing learning and exchange] it is reported that Ningbo Runhe High Tech Materials Technology Co., Ltd. has a large number of high active urea and amino formate, which can be cross-linked on the surface of the fiber to form a film with high elasticity. The perfect combination of polyurethane and organosilicon has developed two kinds of high elasticity resin modified silicone oil. Click to read the original: "don't miss this time! Resin modified silicone oil super bullet comes, Runhe materials rebuild silicone oil legend! "
Today, we will further introduce high elastic resin modified silicone oil to you to see its super performance!
Study on the application of new resin modified silicone oil
Suitable for the soft finishing of polyester, NR, cashmere and polyester cotton blends
Study on the application of different kinds of silicone oil
Research background
It is inevitable that there is friction between textile fabrics and clothing in the process of wearing, transportation, storage and washing. Fabric or clothing will fade. When wearing products with poor color fastness, in case of rain or perspiration, the molecules or heavy metal ions in the dye fall off the surface of the fabric, and contact with the human skin, the part of the skin in contact with the fabric will appear pruritus, in serious cases, there will be erythema, pimples, etc., leading to contact dermatitis. Therefore, the fastness to abrasion (dry / wet rubbing) is particularly important for the application of textiles.
test method
Dry friction: fix the dry friction cloth on the friction head of the tester, so that the longitudinal direction of the friction cloth is consistent with the running direction of the friction head. In the length direction of dry friction sample, 20 times of back and forth friction, the reciprocating range is 80mm, and the vertical pressure is 9N.
Wet friction: use wet friction cloth to operate according to the dry friction step. The wet rubbing cloth must be soaked with distilled water, and the rolling liquid device shall be used to make its water content about 95%. After the friction, it shall be dried at room temperature.
Result representation
Before rating, use transparent glue to gently remove the loose fluff on the rubbing white cloth. Use three layers of unused friction white cloth under the friction white cloth to be evaluated, and evaluate the color level of friction small white cloth according to the standard color gray card (requirement: the color outline of friction small white cloth shall be round and clear). See the sample of friction grade
Friction result sticking
It can be seen from Fig. 1 that in the dry friction fastness, resin modified silicone oil has the best dry friction resistance and amino silicone oil has the worst dry friction resistance. The order of fastness to dry friction is: resin modified silicone oil & gt; traditional block silicone oil & gt; amino silicone oil
Among them, resin modified silicone oil has the best wet friction fastness, and amino silicone oil has the same wet friction resistance as block silicone oil. The order of fastness to wet friction is: resin modified silicone oil & gt; traditional block silicone oil ≈ amino silicone oil
This is because a large amount of fatty alcohol polyoxyethylene ether and other non-ionic surfactants are needed as emulsifiers when amino silicone oil forms stable emulsion. A large amount of emulsifier is also the solvent of dye, which causes the dye on the fabric to fall off easily.
There are a lot of high active urea and carbamate in the molecular structure of resin modified silicone oil, which has excellent film-forming performance. A micro protective film is formed between the fabric and the external friction material, so the dye is not easy to fall off.
The characteristics of block silicone oil are between the two.
It can be seen from Fig. 2 that in the dry friction fastness, resin modified silicone oil has the same dry friction resistance as traditional block silicone oil, and amino silicone oil has the worst dry friction resistance. The order of dry friction fastness is: resin modified silicone oil ≈ traditional block silicone oil & gt; amino silicone oil
Among them, resin modified silicone oil has the best wet friction fastness, amino silicone oil has the worst wet friction fastness, and the traditional block silicone oil has a wet friction resistance effect between them. The order of fastness to wet friction is: resin modified silicone oil & gt; traditional block silicone oil & gt; amino silicone oil
To sum up, in the molecular structure of resin modified silicone oil, - NH is more dense, which can give the product better adhesion to the fabric. The perfect combination of silicone and polyurethane has excellent tribological properties, and its performance in the rubbing fastness (dry / wet rubbing) is better than that of amino silicone oil and traditional block silicone oil.
Study on the application of different kinds of silicone oil
Detection and representation
After the fabrics are treated with different kinds of silicone oil and the moisture returns to the standard atmosphere for 2 hours, the color change data Δ L *, Δ a *, Δ b * of the finished fabric and the reference sample fabric are tested with the Datacolor colorimeter, Δ e, etc. (where Δ L * is the lightness variable, positive value indicates that the color becomes brighter and lighter, negative value indicates that it becomes darker and darker; Δ a * is red green color light, positive value indicates that it is red light, negative value indicates that it is green light; Δ B * is yellow blue light, positive value indicates that it is yellow light, negative value indicates that it is blue light; Δ e is the standard deviation, the greater the value indicates the color change.)
Table 1 color change test results
Sample test items
Delta L*
Delta a*
Delta b*
Delta E*
CIE whiteness
RH-NB-6088-3
-0.14
-0.54
-0.55
Zero point seven nine
One point nine nine
RH-NB-6088-5
Zero point one five
-0.24
-0.39
Zero point four eight
Two point zero seven
Amino silicone oil
Zero point one one
-0.47
-0.91
One point zero three
Four point four six
Traditional block silicone oil
Zero point zero two
-0.47
-0.53
Zero point seven one
Two point two eight
It can be seen from table 1 that the resin modified silicone oil rh-nb-6088-3 is slightly lighter than the reference cloth, the color light is more green and blue, and the overall color difference is small; the resin modified silicone oil rh-nb-6088-5 is slightly darker than the reference cloth, the color light is more green and blue, and the overall color difference is small; the fabric color difference changes the most after amino silicone oil treatment. The overall order of color and light change is: rh-nb-6088-3 < rh-nb-6088-5 < traditional block silicone oil < amino silicone oil. In terms of whiteness, the yellow of amino silicone oil is larger than that of resin modified silicone oil. The sequence of yellowing is: rh-nb-6088-3 ＜ rh-nb-6088-5 ＜ traditional block silicone oil ＜ amino silicone oil.
This may be due to the excellent film-forming property of resin modified silicone oil and the formation of a protective layer on the surface of the fabric after the combination of the dye and the fabric. The dye is less affected by the external environment and the color change is smaller.
Amino groups in amino silicone oil can react with dye chromophores. The more amino groups, the more likely the dye will be oxidized.
The structure of traditional block silicone oil affects the properties, and the degree of color change is between resin modified silicone oil and amino silicone oil.
Fig. 1 test results of color change of different kinds of silicone oil on red cotton fabric
Fig. 2 test results of color change of black polyester fabric with different kinds of silicone oil
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