A plateau original non-destructive softening treatment process method

Abstract

The application discloses a kind of plateau primary non-destructive softening treatment process method, belong to hair product processing technical field, solve the technical problems that traditional softening process is aimed at altitude 3000m above, diameter 80 μm above plateau coarse hair quality exists insufficient softening effect, hair scale is damaged seriously, hair fracture strength decreases, finished product flexibility and durability is poor.The application is by the plateau primary hair that screening is completed, is added to citric acid aqueous solution soaking, adjusts hair pH to weak acidity, then sequentially through gradient subsection softening treatment, sodium lactate neutralization locks scale processing and nutrition repair, low-temperature drying setting;Among them, the concentration of citric acid aqueous solution is 1.0%-3.0%, adjusts hair pH 2.5-3.5.Gradient subsection softening treatment includes shallow softening liquid and middle layer softening liquid: shallow softening liquid includes: amino silicon oil microemulsion and betaine, middle layer softening liquid includes hydrolyzed collagen and D-panthenol.Under the premise of not damaging hair scale, not reducing hair strength, realize plateau coarse hair flexibility.

Description

Technical Field

[0001] This invention relates to the field of hair product processing technology, specifically a non-destructive softening process for high-altitude native hair. Background Technology

[0002] Human hair is the core raw material for high-end wigs and hair accessories. Currently, the mainstream processing and softening technology in the industry is designed for ordinary human hair with a diameter of less than 80μm. The entire chemical formula and temperature and duration control logic are developed around fine and soft hair, which can only meet the needs of smoothing ordinary hair.

[0003] High-altitude wild hair from regions above 3000m is a unique and high-quality raw material. This type of hair grows in the special soil and water environment of the plateau, resulting in a dense and thick cortex with a diameter generally reaching 80μm or more. It boasts high strength, excellent elasticity, strong styling support, and durable finished products, giving it high market value in the high-end human hair product sector. However, the inherent characteristics of this hair also bring significant processing drawbacks: the hair is rich in calcium and magnesium minerals, which easily react with softening agents to form deposits that clog the hair cuticles, hindering agent penetration; furthermore, the thick cortex and coarse texture mean that conventional softening formulas for fine hair can only act on the surface, resulting in insufficient softening and a stiff, frizzy finished product.

[0004] Currently, the industry mostly uses high-concentration inorganic strong acid soaking and alkali neutralization processes to treat coarse and stiff hair. Strong acids and alkalis will excessively swell keratin and damage the hair cuticle, causing a significant decline in hair strength, color fastness and styling ability. Weakening the acid and alkali process cannot achieve the softening effect. Existing traditional processes are difficult to balance the smooth modification of high-altitude original hair with the protection of its natural structure, and are difficult to adapt to the standardized mass production requirements of high-end hair products. Summary of the Invention

[0005] In view of the shortcomings and deficiencies of the existing technology, the present invention provides a non-destructive softening process for high-altitude native hair by chelating mineral impurities through weak acid pretreatment, segmented and controllable softening combined with gentle neutralization and repair, which achieves fully smooth hair without damaging the hair cuticle and ensuring hair strength.

[0006] To achieve the above objectives, the present invention provides the following technical solution: This invention provides a non-destructive softening process for high-altitude native hair, comprising the following steps: Pre-soaking human high-altitude native hair in a pre-soaking solution without damaging the hair cuticle or reducing hair strength, making the hair system weakly acidic, followed by gradient segmented softening treatment, sodium lactate neutralization and scale-locking treatment, and nutritional repair treatment; specifically, the high-altitude native hair selected is native hair grown at an altitude of over 3000m and with a hair diameter ≥80μm. The pre-wetting solution is an aqueous solution of citric acid, wherein the mass fraction of citric acid is 1.0%~3.0%, and the pH of the pre-wetting treatment system for hair is 2.5~3.5; The gradient segmented softening treatment involves sequentially applying a shallow softening solution and a medium softening solution for shallow and medium softening treatments: By mass fraction, the raw material components of the shallow softening solution include: 2.0%~5.0% amino silicone oil microemulsion and 0.5%~1.5% betaine; the raw material components of the middle softening solution include: 1.0%~2.0% hydrolyzed collagen and 0.5%~1.0% D-panthenol.

[0007] Preferably, it includes the following steps: S1. Citric acid pre-wetting: The pre-treated high-altitude primary hairs are placed in a citric acid aqueous solution for pre-wetting treatment. S2, Gradient segmented softening process: S21 Shallow Softening: Add the pre-soaked hair to the shallow softening solution and soak it at a constant temperature of 30℃~38℃ for shallow softening treatment. After the shallow softening is completed, rinse the surface of the hair with deionized water. S22 Intermediate Softening: After the hair has been softened by the shallow layer, it is added to the intermediate softening solution and soaked in the softening solution at a temperature of 30℃~38℃ to soften the hair by the shallow layer. S3, Neutralize and lock the hair cuticles with sodium lactate: Soak the softened hair in sodium lactate neutralization solution to control and terminate the softening reaction and close the hair cuticles. After neutralization is complete, rinse with warm water. S4. Nourishing Repair: Soak the neutralized and rinsed hair in the nourishing repair solution for conditioning treatment. After the repair is completed, rinse with warm water.

[0008] Preferably, in step S1, the raw material screening pretreatment specifically includes: Primary hair grown at an altitude of over 3000m in the plateau region was selected, with a hair diameter ≥80μm; First, impurities and damaged hair from perming and dyeing are removed by sorting. Then, the hair is soaked and disinfected in a benzalkonium chloride solution with a concentration of 0.1%.

[0009] Preferably, in step S1, the pre-soaking solution is a citric acid aqueous solution. The specific conditions for the pre-soaking treatment are: soaking at a temperature of 20℃~28℃ for 10~15 minutes to open the hair cuticles on the original high-altitude hair; after soaking, only the excess solution on the surface is drained off, and the hair has a liquid content of 80%~100%, and it is directly put into the shallow softening process for treatment.

[0010] Preferably, in step S2, the amino silicone oil microemulsion in the shallow softening solution is specifically a cationic amino silicone oil microemulsion with an ammonia value of 0.3~0.6 and an emulsion particle size ≤100nm; the betaine is cocamidopropyl betaine CAPB. In the intermediate softening solution, the hydrolyzed collagen is specifically animal-derived type I collagen with a molecular weight ≤3000 Da; D-panthenol is provitamin B5; and the pH of the intermediate softening solution is 4.5~5.5.

[0011] In the preferred gradient segmented softening process: The specific process for shallow softening and constant temperature soaking treatment is as follows: soaking at a temperature of 32℃~38℃ for 8~12 minutes; after shallow softening, lightly rinse the hair strands with deionized water for 30~60 seconds, with a liquid retention rate of 75%~90% on the hair strand surface; The specific process for the intermediate softening liquid immersion treatment is as follows: immersion treatment at a temperature of 30℃~35℃ for 10~15 minutes.

[0012] Preferably, in step S3, the mass fraction of sodium lactate in the sodium lactate neutralization solution is 2.0%~3.0%; the overall pH of the sodium lactate neutralization solution is adjusted to 4.5~5.5 using lactic acid or citric acid.

[0013] Preferably, in step S3, the specific process for neutralizing the locking scales is as follows: At room temperature, the hair strands that have undergone intermediate softening are soaked in sodium lactate neutralizing solution for 5-8 minutes for neutralization treatment. After neutralization and locking of the scales, the hair strands are rinsed with 35°C warm water to remove the neutralizing solution remaining on the surface of the hair strands. The hair strands are drained until the excess water is removed, and the hair strands are kept at a water content of 50%-70% before proceeding directly to the nutrition repair process.

[0014] Preferably, in step S4, the nutrient repair solution comprises, by mass fraction: 0.5%~1.0% phytosterol esters, 1.0%~2.0% jojoba oil microemulsion, and the remainder is deionized water; the pH of the nutrient repair solution is 5.0~6.0. Soak the hair in a nourishing repair solution for 10 minutes. After the repair is complete, rinse the hair with 40°C warm water.

[0015] Preferably, the process also includes step S5, low-temperature drying: the drying temperature is 40℃~45℃, and the hair is dried until the moisture content is 8%~12%.

[0016] The non-destructive softening process for high-altitude origins provided by this invention has the following beneficial effects: (1) The non-destructive softening process of high-altitude original hair of the present invention is for coarse and hard high-altitude original hair with an altitude of more than 3000m and a diameter of ≥80μm. By synergistic effect of the complete process of chelating mineral impurities with citric acid weak acid pretreatment, two-stage gradient layered softening, scale locking with sodium lactate weak acid, nutritional repair and low temperature drying, the hair smoothness, curling and shaping ability and color fastness to water washing are effectively improved while completely protecting the hair cuticle and preserving the original breaking strength of the hair. The finished product quality and long-term durability of high-end wigs made from high-altitude original hair are significantly improved from the raw material processing end.

[0017] The process of this invention first employs citric acid pre-soaking. Citric acid removes mineral impurities such as calcium and magnesium from the hair strands through chelation, preventing mineral ions from combining with the softening agent to form precipitates that clog the hair cuticles and ensuring uniform penetration of the softening agent. At the same time, it stabilizes the hair strands in a slightly acidic environment, moderately moistens the hair strands, causes a short-term slight swelling to open the hair cuticles, and strengthens the intermolecular force network within keratin, avoiding excessive swelling and damage to the hair strands during the softening process. During the citric acid pre-soaking process, coarse and stiff hair strands are fully and evenly moistened and expanded, balancing the differences in hair quality between raw materials from different origins and ensuring the uniformity of softening of the entire batch of raw materials.

[0018] This invention, based on a citric acid pre-impregnation of a uniform hair processing base, employs a two-stage gradient layered softening process. Through step-by-step treatment of the shallow and middle layers, the softening depth is precisely controlled: the shallow layer utilizes amino silicone oil microemulsion and amphoteric betaine in synergy to moderately relax the hair cuticles and form a lubricating film on the hair surface, optimizing hair smoothness. The middle layer, composed of low-molecular-weight collagen and panthenol, penetrates into the hair cortex, gently and evenly controlling the degree of keratin disulfide bond breakage. This results in more uniform and controllable keratin disulfide bond breakage, preserving the hair's natural toughness and elasticity, and enhancing the durability of high-end wigs. Compared to a one-time strong softening method, the segmented treatment mode acts on the hair surface and interior in stages, preventing hair fiber breakage due to excessive local softening. It effectively softens coarse, hard natural hair while fully preserving its original toughness and elasticity, effectively balancing hair smoothness and mechanical strength.

[0019] After pre-impregnation with citric acid and a two-stage gradient softening process, the overall softening reaction system within the hair strands is weakly acidic, keeping the hair cuticles open. This invention uses a sodium lactate weakly acidic system instead of traditional strong alkali neutralization. This gently terminates the softening reaction, preventing strong alkali from corroding the hair cuticles, while gradually increasing the pH of the hair system. The pH of the neutralization and nourishing repair processes is adjusted to match the isoelectric point of keratin in the natural acid-base environment of human hair, promoting uniform closure and locking of the cuticles. This facilitates the adhesion of nutrients, reduces the loss of effective nutrients, and significantly improves the colorfastness to washing and curl retention. The finished product is less prone to fading and deformation with long-term use.

[0020] (2) The entire process of this invention uses mild weak acids and low-irritant active raw materials, without the participation of high-concentration inorganic strong acids and strong alkalis. After processing, the hair cuticles have high integrity and the breaking strength is far superior to that of traditional acid and alkali processes. The finished product has multiple advantages such as low friction and smooth feel, long-lasting styling and water resistance. Moreover, the temperature, solution concentration and processing time of each process are set with stable parameter ranges, the process has strong stability, and is suitable for standardized and large-scale processing on production lines. It is suitable for processing high-end real human hair wig raw materials. Attached Figure Description

[0021] Figure 1 The images shown are macroscopic photographs and scanning electron microscope (SEM) images of the original highland hair before and after processing in the embodiments and comparative examples of the present invention. A is a macroscopic photograph of the unprocessed original highland hair; B is an SEM image of the hair cuticle corresponding to the original hair strand; C is a macroscopic photograph of the hair strand after processing in the comparative example; D is an SEM image of the hair cuticle corresponding to the processed hair strand in the comparative example; E is a macroscopic photograph of the hair strand after processing in the embodiments of the present invention; and F is an SEM image of the hair cuticle corresponding to the processed hair strand in the embodiments of the present invention. Detailed Implementation

[0022] The terminology used in this invention, unless otherwise specified, generally has the meanings commonly understood by those skilled in the art. The invention is further described in detail below with reference to specific embodiments, accompanying drawings, and data. The following embodiments are merely illustrative and are not intended to limit the scope of the invention in any way. Example 1

[0023] The non-destructive softening process originating from high-altitude areas includes the following steps: S1. Select original hair from areas at an altitude of 3000m or above, with a hair diameter ≥80μm; first, remove impurities and damaged hair from perming and dyeing by manual or mechanical sorting, and then disinfect by soaking in benzalkonium chloride solution with a concentration of 0.1%.

[0024] S2, Citric Acid Pre-soaking: The pre-treated highland hair is added to a 1.0% citric acid aqueous solution and soaked at 20°C for 10 minutes. After soaking, only the excess solution on the surface is drained off. The hair has a liquid content of 80%~100% and is directly put into the shallow softening process.

[0025] S3, Gradient segmented softening processing, specifically includes: S31 Shallow Softening: Immerse the pre-soaked hair in a shallow softening solution, which specifically includes 2.0% amino silicone oil microemulsion, 0.5% betaine, and the remainder is deionized water. Soak the hair at a constant temperature of 32℃ for 8 minutes. After the shallow softening is completed, gently rinse the surface of the hair with deionized water.

[0026] S32 Intermediate Softening: After the hair has been softened in the shallow layer, it is added to the intermediate softening solution, which specifically includes 1.0% hydrolyzed collagen, 0.5% panthenol, pH 4.5, and the remainder is deionized water. The hair is soaked at 30°C for 10 minutes to achieve deep softening.

[0027] S4. Neutralize and lock the hair cuticles with sodium lactate: Add the softened hair strands to a 2.0% sodium lactate neutralizing solution and soak at room temperature for 5 minutes to stop the softening reaction and close the hair cuticles. After neutralization, rinse twice with 35°C warm water for 1 minute each time to remove the neutralizing solution residue on the surface. After rinsing, drain off the excess water on the surface. The liquid retention rate is 60%, and the hair can directly enter the nutrition repair process.

[0028] S5. Nourishing Repair: Place the neutralized and rinsed hair into the nourishing repair solution, which specifically includes 0.5% phytosterol esters and 1.0% jojoba oil microemulsion, with a pH of 5.0~6.0. Soak for 10 minutes for nourishing repair. After the repair is complete, rinse twice with 40℃ warm water.

[0029] S6. Low-temperature drying: Place the repaired and rinsed hair in a constant temperature drying device and dry at a low temperature of 40℃~45℃. Example 2

[0030] The non-destructive softening process originating from high-altitude areas includes the following steps: S1. Select original hair from areas at an altitude of 3000m or above, with a hair diameter ≥80μm; first, remove impurities and damaged hair from perming and dyeing by manual or mechanical sorting, and then disinfect by soaking in benzalkonium chloride solution with a concentration of 0.1%.

[0031] S2, Citric Acid Pre-soaking: The pre-treated highland hair is added to a 2.0% citric acid aqueous solution and soaked at 25°C for 12 minutes. After soaking, only the excess solution on the surface is drained off. The hair has a liquid content of 80%~100% and is directly put into the shallow softening process.

[0032] S3, Gradient segmented softening processing, specifically includes: S31 Shallow Softening: Immerse the pre-soaked hair strands in a shallow softening solution, which specifically includes 3.5% amino silicone oil microemulsion, 1.0% betaine, and the remainder is deionized water. Soak the hair strands at a constant temperature of 35℃ for 10 minutes. After the shallow softening is completed, rinse the surface of the hair strands lightly with deionized water. S32 Intermediate Softening: The hair strands that have been softened in the shallow layer are then added to the intermediate softening solution, which specifically includes 1.5% hydrolyzed collagen, 0.8% panthenol, pH 5.0, and the remainder is deionized water. The hair strands are soaked at 32°C for 12 minutes to achieve deep softening. S4. Neutralize and lock the hair cuticles with sodium lactate: Add the softened hair strands to a 2.5% sodium lactate neutralizing solution and soak at room temperature for 6 minutes to stop the softening reaction and close the hair cuticles. After neutralization, rinse twice with 35°C warm water for 1 minute each time to remove the neutralizing solution residue on the surface. After rinsing, drain off the excess water on the surface. The liquid retention rate is 60%, and the hair can directly enter the nutrition repair process.

[0033] S5. Nourishing Repair: Place the neutralized and rinsed hair into the nourishing repair solution, which specifically includes 0.8% phytosterol esters and 1.5% jojoba oil microemulsion, with a pH of 5.0~6.0. Soak for 10 minutes for nourishing repair, and then rinse a second time with 40℃ warm water after the repair is complete.

[0034] S6. Low-temperature drying: Place the repaired and rinsed hair in a constant temperature drying device and dry at a low temperature of 40~45℃. Example 3

[0035] The non-destructive softening process originating from high-altitude areas includes the following steps: S1. Select original hair from areas at an altitude of 3000m or above, with a hair diameter ≥80μm; first, remove impurities and damaged hair from perming and dyeing by manual or mechanical sorting, and then disinfect by soaking in benzalkonium chloride solution with a concentration of 0.1%.

[0036] S2, Citric Acid Pre-soaking: The pre-treated highland hair is added to a 3.0% citric acid aqueous solution and soaked at 28°C for 12 minutes. After soaking, only the excess solution on the surface is drained off. The hair has a liquid content of 80%~100% and is directly put into the shallow softening process.

[0037] S3, Gradient segmented softening processing, specifically includes: S31. Shallow softening: Immerse the pre-soaked hair strands in a shallow softening solution, which specifically includes 5.0% amino silicone oil microemulsion, 1.5% betaine, and the remainder is deionized water. Soak the hair strands at a constant temperature of 38°C for 12 minutes. After the shallow softening is completed, rinse the surface of the hair strands lightly with deionized water. S32, Intermediate Softening: After the hair has been softened in the shallow layer, it is added to the intermediate softening solution, which specifically includes 2.0% hydrolyzed collagen, 1.0% panthenol, pH 5.5, and the remainder is deionized water. The hair is soaked at 35°C for 15 minutes to achieve deep softening. S4. Neutralize and lock the hair cuticles with sodium lactate: Add the softened hair strands to a 3.0% sodium lactate neutralizing solution and soak at room temperature for 8 minutes to stop the softening reaction and close the hair cuticles. After neutralization, rinse twice with 35°C warm water for 1 minute each time to remove the neutralizing solution residue on the surface. After rinsing, drain off the excess water on the surface. The liquid retention rate is 60%, and the hair can directly enter the nutrition repair process.

[0038] S5. Nourishing Repair: Place the neutralized and rinsed hair into the nourishing repair solution, which specifically includes 1.0% phytosterol esters and 2.0% jojoba oil microemulsion, with a pH of 5.0~6.0. Soak for 10 minutes for nourishing repair. After repair, rinse a second time with 40℃ warm water.

[0039] S6. Low-temperature drying: Place the repaired and rinsed hair in a constant temperature drying device and dry at a low temperature of 40~45℃.

[0040] Comparative Example 1 The traditional acidic soaking and alkaline washing neutralization process is used to treat the original high-altitude hair, specifically including the following steps: S1. Select original hair from the same batch in Example 1, which is grown at an altitude of over 3000m and has a hair diameter of ≥80μm. First, remove impurities and damaged hair from perming and dyeing by manual or mechanical sorting. Then, disinfect the hair by soaking it in benzalkonium chloride solution with a concentration of 0.1%.

[0041] S2, Strong acid soaking: The pre-treated high-altitude hairs are added to a hydrochloric acid solution with a pH of 1.5 and soaked at 50°C for 30 minutes.

[0042] S3, Alkaline Neutralization: Immerse the hair soaked in strong acid in a sodium carbonate solution with a pH of 9.5 at room temperature for 10 minutes.

[0043] S4. Routine care: Soak hair in a commercially available conditioner for 10 minutes.

[0044] Test Example 1 The high-altitude native hair treated with the process methods of Examples 1-3 and Comparative Example 1 were subjected to performance tests. The test data results are shown in the table below:

[0045] As can be seen from the test data in the table above, the high-altitude hair treated by the process method of the present invention in Examples 1-3 exhibits significantly better performance indicators than the comparative examples of traditional strong acid and alkali processes. In this embodiment, the hair cuticle integrity of the processed hairs using the methods described in 1-3 is ≥92%, far exceeding the 68% integrity achieved by traditional strong acid and alkali processes. Traditional processes rely on high concentrations of strong acids and alkalis to directly act on the hair, resulting in severe swelling, corrosion, and cuticle peeling. In contrast, this invention uses a weak acid system throughout the entire process. Citric acid pre-wetting strengthens the keratin molecular network, gradient softening and layering gently soften the hair, and finally, sodium lactate gently closes the cuticles. This process avoids contact with highly corrosive media throughout, effectively preserving the natural structure of the hair.

[0046] The three embodiments of this invention all exhibit a hair breaking strength ≥1.82 cN / tex, representing an improvement of over 27% compared to the traditional process. Simultaneously, the hair friction coefficient is controlled below 0.18, a reduction of over 45% compared to the traditional method, truly achieving a balance between smoothness and hair strength. These effects are primarily achieved through a layered gradient softening process. The superficial layer gently relaxes the hair cuticles and lubricates the surface, while the middle layer, with its small-molecule collagen and panthenol, slowly and evenly regulates the degree of disulfide bond breakage in the cortex. This avoids the problems of excessive disulfide bond breakage and fiber brittleness caused by traditional one-time strong softening. While effectively improving the stiffness and frizz of coarse, hard hair, it fully preserves the hair's original resilience, achieving a soft and undamaged effect.

[0047] In Examples 1-3, the data from all three examples outperformed the comparative examples using traditional processes in terms of both wash fastness and 48-hour curl retention. This invention, through a sodium lactate neutralization and scale-locking process, gently terminates the softening reaction, preventing the solution from continuously damaging keratin. Simultaneously, the system's pH matches the hair's isoelectric point, promoting the uniform closure and locking of open hair cuticles, thus locking in pigments, nutrients, and effective styling ingredients within the hair. Subsequent nourishing and repairing processes further fill the gaps in the cuticles, reducing the loss of effective substances during washing, significantly improving the hair's wash fastness, curl retention, and long-term stability.

[0048] Test Example 2 The high-altitude native hair processed according to the process described in this embodiment, along with untreated high-altitude native braided hair and hair treated with conventional strong acid and alkali processes as a comparative example, were subjected to macroscopic appearance observation and scanning electron microscopic observation. The results are as follows: Figure 1 As shown: In terms of macroscopic appearance: untreated highland native braided hair like Figure 1 As shown in (A), the hair strands are coarse, stiff, curly, fluffy, frizzy, and messy, lacking luster and shine. Hair treated with conventional processes looks like... Figure 1 As shown in (C), the hair still lacks smoothness and natural shine, and the drape is poor. The hair strands treated with the gradient segmented softening and sodium lactate scale-locking process in this embodiment are as follows: Figure 1 (E) The binding strip is flat, straight, smooth, with uniform gloss, strong drape, and a soft and smooth feel.

[0049] Microscopic aspects of scanning electron microscopy: The microscopic morphology of three groups of hair-like scales was observed using a scanning electron microscope at 1000x magnification. The original, untreated hair-like scales, such as... Figure 1 As shown in (B), large areas of the hair cuticles are raised, the edges are damaged, and the gaps between the scales are completely open. Traditional one-step strong acid-base softening processes used to treat hair cuticles result in... Figure 1As shown in (D), under the intense corrosive effects of strong acids and alkalis, the hair cuticles exhibit large-scale tearing and cracking, with some cuticles peeling off completely and becoming uneven, resulting in irreversible damage to the cuticle structure. The hair cuticles treated in this embodiment are as follows... Figure 1 As shown in (F), the hair cuticles are flat, smooth, and tightly closed, with the gaps between the cuticles basically closed. The surface structure of the hair is intact, forming a continuous and dense protective film. There is no damage from chemical erosion, cracking, or shedding of the cuticles. The above fully verifies that the process method of the present invention, through the weak acid gradient softening, sodium lactate scale locking, and specific nutrient repair process, can fully soften the hair while completely preserving the cuticle structure.

[0050] In summary, this invention provides a complete set of non-destructive softening processes for hair grown in high-altitude areas. Through pre-mineralization with citric acid, two-stage gradient layered softening, neutralization and scale locking with sodium lactate, and synergistic effects of nutrition and repair, it simultaneously improves hair smoothness, color fastness to washing, and curl setting durability while completely protecting the hair cuticle and preserving the original breaking strength of the hair. This solves the problems of easy damage to hair and poor durability of finished products caused by traditional softening processes. At the same time, the process parameters have high tolerance for error and have stable industrial production capabilities.

[0051] The above are merely embodiments of the present invention. For example, in the citric acid pre-soaking process, the citric acid mass fraction is 1.0% to 3.0%, and the pH of the hair system after soaking is 2.5 to 3.5. Both of these conditions can achieve the non-destructive softening process of the original high-altitude hair of the present invention.

[0052] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A non-destructive softening treatment process for high-altitude origins, characterized in that, The process includes the following steps: Without damaging the hair cuticle or reducing hair strength, real high-altitude native hair is placed in a pre-soaking solution for pre-soaking treatment, making the hair system weakly acidic. Then, it undergoes a gradient-segmented softening treatment, sodium lactate neutralization and scale-locking treatment, and a nutritional repair treatment. Specifically, the high-altitude native hair selected is native hair grown at an altitude of over 3000m and with a hair diameter ≥80μm. The pre-wetting solution is an aqueous solution of citric acid, wherein the mass fraction of citric acid is 1.0%~3.0%, and the pH of the pre-wetting treatment system for hair is 2.5~3.5; The gradient segmented softening process sequentially uses a shallow softening solution and a medium softening solution to perform shallow softening treatment and medium softening treatment: By mass fraction, the raw material components of the shallow softening solution include: 2.0%~5.0% amino silicone oil microemulsion and 0.5%~1.5% betaine; the raw material components of the middle softening solution include: 1.0%~2.0% hydrolyzed collagen and 0.5%~1.0% D-panthenol.

2. The non-destructive softening treatment process for plateau origins according to claim 1, characterized in that, Specifically, the following steps are included: S1. Citric acid pre-wetting: The pre-treated high-altitude primary hairs are placed in a citric acid aqueous solution for pre-wetting treatment. S2, Gradient segmented softening process: S21 Shallow Softening: Add the pre-soaked hair to the shallow softening solution and soak it at a constant temperature of 30℃~38℃ for shallow softening treatment. After the shallow softening is completed, rinse the surface of the hair with deionized water. S22 Intermediate Softening: After the hair has been softened by the shallow layer, it is added to the intermediate softening solution and soaked in the softening solution at a temperature of 30℃~38℃ to soften the hair by the shallow layer. S3, Neutralize and lock the hair cuticles with sodium lactate: Soak the softened hair in sodium lactate neutralization solution to control and terminate the softening reaction and close the hair cuticles. After neutralization is complete, rinse with warm water. S4. Nourishing Repair: Soak the neutralized and rinsed hair in the nourishing repair solution for conditioning treatment. After the repair is completed, rinse with warm water.

3. The non-destructive softening treatment process for plateau origins according to claim 2, characterized in that, In step S1, the raw material screening pretreatment specifically includes: Primary hair grown at an altitude of over 3000m in the plateau region was selected, with a hair diameter ≥80μm; First, impurities and damaged hair from perming and dyeing are removed by sorting. Then, the hair is soaked and disinfected in a benzalkonium chloride solution with a concentration of 0.1%.

4. The non-destructive softening treatment process for plateau origins according to claim 3, characterized in that, In step S1, the pre-wetting solution is a citric acid aqueous solution. The specific conditions for the pre-wetting treatment are: soaking at a temperature of 20℃~28℃ for 10~15 minutes to open the hair cuticles on the original high-altitude hair; after soaking, only the excess solution on the surface is drained off, and the hair has a liquid content of 80%~100%, and it is directly put into the shallow softening process for treatment.

5. The non-destructive softening treatment process for plateau origins according to claim 2, characterized in that, In step S2, the amino silicone oil microemulsion in the shallow softening solution is specifically a cationic amino silicone oil microemulsion, the ammonia value of the cationic amino silicone oil microemulsion is 0.3~0.6, and the emulsion particle size is ≤100nm; the betaine is cocamidopropyl betaine CAPB. In the intermediate softening solution, the hydrolyzed collagen is specifically animal-derived type I collagen with a molecular weight ≤3000 Da; D-panthenol is provitamin B5; and the pH of the intermediate softening solution is 4.5~5.

5.

6. The non-destructive softening treatment process for plateau origins according to claim 5, characterized in that, In the gradient segmented softening process: The specific process for shallow softening and constant temperature soaking treatment is as follows: soaking at a temperature of 32℃~38℃ for 8~12 minutes; after shallow softening, lightly rinse the hair strands with deionized water for 30~60 seconds, with a liquid retention rate of 75%~90% on the hair strand surface; The specific process for the intermediate softening liquid immersion treatment is as follows: immersion treatment at a temperature of 30℃~35℃ for 10~15 minutes.

7. The non-destructive softening treatment process for plateau origins according to claim 2, characterized in that, In step S3, the mass fraction of sodium lactate in the sodium lactate neutralization solution is 2.0% to 3.0%; the overall pH of the sodium lactate neutralization solution is adjusted to 4.5 to 5.5 using lactic acid or citric acid.

8. The non-destructive softening treatment process for plateau origins according to claim 7, characterized in that, In step S3, the specific process for neutralizing the locking scales is as follows: At room temperature, the hair strands that have undergone intermediate softening are soaked in sodium lactate neutralizing solution for 5-8 minutes for neutralization treatment. After neutralization and locking of the scales, the hair strands are rinsed with 35°C warm water to remove the neutralizing solution remaining on the surface of the hair strands. The hair strands are drained until the excess water is removed, and the hair strands are kept at a water content of 50%-70% before proceeding directly to the nutrition repair process.

9. The non-destructive softening treatment process for plateau origins according to claim 2, characterized in that, In step S4, the nutrient repair solution comprises, by mass fraction: 0.5%~1.0% phytosterol esters, 1.0%~2.0% jojoba oil microemulsion, and the remainder being deionized water; the pH of the nutrient repair solution is 5.0~6.

0. Soak the hair in a nourishing repair solution for 10 minutes. After the repair is complete, rinse the hair with 40°C warm water.

10. The non-destructive softening treatment process for plateau origins according to claim 2, characterized in that, It also includes step S5, low-temperature drying treatment: the drying temperature is 40℃~45℃, and the hair moisture content is dried to 8%~12%.

Images