Soap and preparation method thereof

Abstract

The present invention discloses a soap and a preparation method thereof, and belongs to the technical field of daily chemicals, the soap comprises the following raw materials by weight: 60-85% of a soap base, 10-30% of goat milk, 5-15% of honey, and 1-10% of amber powder, the soap base is a transparent plant glycerin soap base or an olive oil soap base, the amber powder has a particle size of 100-200 mesh, and the amber powder is subjected to ultraviolet disinfection treatment; the goat milk is pasteurized fresh goat milk; the honey is natural raw honey which is not subjected to high-temperature treatment. According to the soap disclosed by the invention, chemical surface activity is reduced by 15-20% by using 100-200-mesh amber powder, a water locking film is constructed by virtue of goat milk short-chain fatty acid and honey oligosaccharide, so that the water loss rate of skin is reduced to 22%, the water content is increased by 18-25%, a weakly alkaline formula is combined with staged temperature control, the enzyme activity of honey is reserved, the protein denaturation rate of goat milk is reduced, and the erythema index is reduced by adding lavender essential oil. The alkanet root extract is naturally toned, the user preference degree is improved, raw materials are matched with an existing production line, the cost increase is small, high premium can be achieved by depending on the sensitive skin care market, and the advantages of low irritation, high moisturizing and the like are achieved.

Description

Technical Field

[0001] The invention belongs to the technical field of daily chemicals, and in particular relates to soap and a preparation method thereof. Background Art

[0002] Traditional soaps are mainly composed of synthetic surfactants such as sodium fatty acids. They have strong degreasing power and a high pH value (usually ≥9.0). Long-term use can easily damage the lipid structure of the skin's stratum corneum, leading to an increase in transepidermal water loss (TEWL) by 20%-40%, and further causing skin barrier damage problems such as dryness and sensitivity.

[0003] In recent years, although soaps improved with natural ingredients have been used, they still have significant defects: Ineffective active ingredients: Natural additives (milk, honey, etc.) generally account for less than 10%, and are often compounded with strong detergents such as sodium lauryl sulfate, resulting in insufficient concentration of moisturizing factors and limited efficacy to conceptual additions. Loss of activity during processing: Conventional saponification reactions require a high temperature of over 80°C for 1-2 hours, which results in an inactivation rate of over 60% for heat-sensitive components in honey, such as glucose oxidase and goat milk whey protein. Functional singleness defect: Existing products mostly rely on chemical surfactants to achieve cleaning, lack physical adsorption mechanism, and are unable to reduce the amount of surfactants while removing sebum and dirt, resulting in an imbalance in the "cleansing-nourishing" performance.

[0004] Based on this, the present invention designs a soap and a preparation method thereof to solve the above problems. Summary of the Invention

[0005] The object of the present invention is to provide a soap and a preparation method thereof in order to solve the above-mentioned problems.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions: A soap is composed of the following raw materials in percentage by weight: 60-85% of a soap base, 10-30% of goat milk, 5-15% of honey, and 1-10% of amber powder. The soap base is a transparent vegetable glycerin soap base or an olive oil soap base.

[0007] As a further description of the above technical solution: The amber powder has a particle size of 100-200 meshes and has been sterilized by ultraviolet rays; the goat milk is fresh goat milk that has been pasteurized; and the honey is natural raw honey that has not been treated with high temperatures.

[0008] A method for preparing soap comprises the following steps: S1. Soap base pretreatment: Cut the soap base into 1-2 cm³ pieces, place them in a double-layer heating kettle, and control the temperature to 70-80℃ to melt; S2. Add emulsification: add goat milk and honey in sequence, maintain the temperature at 60-65°C and stir uniformly for 10-15 minutes at a stirring rate of 200-300 rpm; S3. Powder dispersion: sprinkle amber powder evenly into the mixture three times, with an interval of 2 minutes between each time, and continue stirring until no visible particles are left; S4, injection molding: inject the mixed material into the silicone mold, vibrate to remove bubbles, and place it in a 4-10℃ environment to cool and solidify for 2-3 hours; S5. Post-processing: After demoulding, place in a cool and ventilated place for 72 hours, and then package after ultraviolet surface sterilization.

[0009] As a further description of the above technical solution: In step S2, vitamin E acetate is further added as an antioxidant at a concentration of 0.5-1% by weight of the soap base.

[0010] As a further description of the above technical solution: In step S4, the silicone mold is pre-sprayed with a food-grade release agent, and the mold temperature is controlled at 25-30°C.

[0011] As a further description of the above technical solution: The pH value of the finished product ranges from 7.5 to 8.2, the hardness test value (ASTMD217) is 120 to 150, and the foam height (GB / T13173) is ≥15 cm.

[0012] As a further description of the above technical solution: The soap also includes 0.5-3% of plant essential oil by weight of the soap base, wherein the plant essential oil is selected from at least one of lavender essential oil, chamomile essential oil or tea tree essential oil.

[0013] As a further description of the above technical solution: The plant essential oil is lavender essential oil, the addition amount of which is 1-2% of the weight of the soap base, and the linalool content of the lavender essential oil is ≥25% (GC detection).

[0014] As a further description of the above technical solution: The step S3 includes the following staged additions: (a) Add amber powder to the mixture in two portions, with the first addition amount being 60-70% of the total amber powder, and the remaining amount being added after an interval of 2 minutes; (b) immediately injecting 40-60% of the total amount of plant essential oil after each addition of amber powder, controlling the stirring temperature to 50-55°C, and extending the total stirring time to 12-18 minutes; (c) The weight ratio of the plant essential oil to the amber powder is 1:(0.5-2).

[0015] As a further description of the above technical solution: The step S3 further includes a coloring step: adding 0.1-0.5% of a natural pigment to the mixed solution, and stirring at a high speed of 600-800 rpm for 2-4 minutes, wherein the natural pigment is lithospermum root extract or curcumin.

[0016] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are: 1. The soap of the present invention significantly reduces the amount of chemical surfactants used by 15%-20% through the porous physical adsorption effect of amber powder (100-200 mesh), avoiding skin barrier damage caused by excessive degreasing (the skin water loss rate is reduced from 35% in the control group to 22%). The short-chain fatty acids (C8-C14) in goat milk and honey oligosaccharides synergistically form a long-lasting water-locking film. Clinical tests have shown that continuous use for 28 days can increase skin moisture content by 18%-25%. The weakly alkaline formula (pH 7.5-8.2) is close to the healthy skin environment. Combined with the low-irritation design, the erythema index is ≤0.7, which is 66% lower than that of commercially available products, achieving a dual balance of cleansing power and mildness.

[0017] 2. A staged temperature control process (melting 70-80°C → emulsification 60-65°C → essential oil addition ≤55°C) is adopted to maximize the retention of glucose oxidase activity in honey (≥90%) and the integrity of goat milk whey protein (denaturation rate ≤5%). After adding vitamin E acetate at a soap base weight of 0.5-1%, accelerated stability testing (40°C / 75% humidity, 90 days) showed no rancidity and an essential oil retention rate of ≥85%, ensuring the long-term stability of the functional ingredients.

[0018] 3. Lavender essential oil (linalool ≥25%) neutralizes the alkalinity of the soap through weak acidity, further reducing the erythema index by 40% to 0.42 and extending the fragrance life to 72 hours (GB / T14455 test); comfrey root extract and essential oil synergistically adjust the soap to a natural lavender color, avoiding the risk of allergic reactions caused by synthetic pigments, and user preference has increased to 93%; the phased addition process (amber powder to essential oil weight ratio of 1:0.5-2) ensures uniform dispersion of ingredients (caking rate ≤3%), and the hardness is stable at 120-150 (ASTMD217), taking into account both durability and skin feel.

[0019] 4. All raw materials are food-grade or cosmetic-grade commercially available materials with stable sources. The production process only requires the addition of a low-temperature stirring module to the existing soap base production line, and the equipment modification cost is low. The overall production cost increases by ≤15%, but relying on the high added value characteristics of the sensitive skin care market, the product premium space is as high as 200%-300%, and it has significant commercialization potential. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1The present invention provides a schematic flow chart of the steps of a method for preparing soap. DETAILED DESCRIPTION

[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0022] Please see the attached Figure 1 The present invention provides a technical solution: a soap composed of the following raw materials in weight percentage: 60-85% soap base, 10-30% goat milk, 5-15% honey, and 1-10% amber powder, wherein the soap base is a transparent vegetable glycerin soap base or an olive oil soap base.

[0023] The amber powder has a particle size of 100-200 meshes and has been sterilized by ultraviolet rays; the goat milk is fresh goat milk that has been pasteurized; and the honey is natural raw honey that has not been treated with high temperatures.

[0024] The finished product has a pH value range of 7.5-8.2, a hardness test value (ASTMD217) of 120-150, and a foam height (GB / T13173) ≥15 cm. The finished product also includes a plant essential oil accounting for 0.5-3% of the weight of the soap base, and the plant essential oil is selected from at least one of lavender essential oil, chamomile essential oil or tea tree essential oil. The plant essential oil is lavender essential oil, and the addition amount thereof is 1-2% of the weight of the soap base, and the linalool content of the lavender essential oil is ≥25% (GC detection).

[0025] A method for preparing soap comprises the following steps: S1. Soap base pretreatment: Cut the soap base into 1-2 cm³ pieces, place them in a double-layer heating kettle, and control the temperature to 70-80℃ to melt; S2. Add emulsification: add goat milk and honey in sequence, maintain the temperature at 60-65°C and stir uniformly for 10-15 minutes at a stirring rate of 200-300 rpm; S3. Powder dispersion: sprinkle amber powder evenly into the mixture three times, with an interval of 2 minutes between each time, and continue stirring until no visible particles are left; S4, injection molding: inject the mixed material into the silicone mold, vibrate to remove bubbles, and place it in a 4-10℃ environment to cool and solidify for 2-3 hours; S5. Post-processing: After demoulding, place in a cool and ventilated place for 72 hours, and then package after ultraviolet surface sterilization.

[0026] In step S2, 0.5-1% of the weight of the soap base of vitamin E acetate is further added as an antioxidant; in step S4, the silicone mold is pre-sprayed with a food-grade release agent, and the mold temperature is controlled at 25-30°C.

[0027] The step S3 includes the following staged additions: (a) Add amber powder to the mixture in two portions, with the first addition amount being 60-70% of the total amber powder, and the remaining amount being added after an interval of 2 minutes; (b) immediately injecting 40-60% of the total amount of plant essential oil after each addition of amber powder, controlling the stirring temperature to 50-55°C, and extending the total stirring time to 12-18 minutes; (c) The weight ratio of the plant essential oil to the amber powder is 1:(0.5-2).

[0028] The step S3 further includes a coloring step: adding 0.1-0.5% of a natural pigment to the mixed solution, and stirring at a high speed of 600-800 rpm for 2-4 minutes, wherein the natural pigment is lithospermum root extract or curcumin.

[0029] Example 1 (basic formula) Formula composition Note: The addition amount of vitamin E acetate is 0.8% of the soap base weight.

[0030] Preparation method (1) Soap base melting: melt the soap base fragments into liquid at 75°C; (2) Low-temperature emulsification: Cool to 63°C, add goat milk, honey and vitamin E acetate in sequence, and stir at 250 rpm for 12 minutes; (3) Powder dispersion: sprinkle amber powder evenly into the mixture three times, with an interval of 2 minutes between each time, and stir until there are no particles; (4) Injection molding and curing: Inject the pre-sprayed release agent into the 25°C silicone mold, and cool and cure at 5°C for 2.5 hours; (5) Curing and sterilization: After demoulding, ventilate and cure for 72 hours, and sterilize the surface with ultraviolet light.

[0031] Performance data Example 2 (comparative experiment) Control group: commercially available olive oil soap (ingredients: olive oil soap base 85%, cocamide DEA 10%, fragrance 5%) Experimental group: Example 1 formula Test conditions: 10 subjects were tested using a Cornemeter® CM825 probe 1 hour after use.

[0032] Example 3 (Optimization of amber powder particle size) Conclusion: 150-mesh amber powder achieves an excellent balance between cleaning power (≥8.5) and skin feel (≥8.0).

[0033] Example 4 (Lavender essential oil extended formula) Recipe Optimization Note: Lavender essential oil is added at 1.5% of the soap base weight.

[0034] Process improvement Added in stages: (1) First add 70% of the total amount of amber powder and simultaneously inject 50% lavender essential oil (50℃); (2) After 2 minutes, add the remaining 30% amber powder and 50% essential oil; (3) Color adjustment: Add lithospermum root extract before injection molding and stir at 500 rpm for 3 minutes.

[0035] Verify data Example 5 (Process comparison experiment) Control group: Add all amber powder and essential oil at once Experimental group: the present invention's phased addition method Industrial Applicability The present invention verifies the manufacturability of the formula through Examples 1-5: All raw materials are commercially available food / cosmetic grade materials; The process equipment is compatible with conventional soap base production lines (only a low-temperature stirring module needs to be added); The production cost increases by ≤15% compared with traditional processes, and the premium of the end product can reach 200%-300% (sensitive skin care market segment).

[0036] This invention breaks through the technical bottleneck of traditional soap's difficulty in balancing "cleansing power, mildness, and functionality" through component collaborative design (amber powder for adsorption + goat milk / honey for moisturizing + essential oils for soothing), low-temperature process innovation (stage-by-stage temperature control + fractional addition), and natural ingredient compounding (comfrey root for coloring + vitamin E for antioxidant), providing a product solution with both efficacy and commercial value for the sensitive skin care field.

[0037] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A soap, characterized in that The soap is composed of the following raw materials in percentage by weight: 60-85% soap base, 10-30% goat milk, 5-15% honey, and 1-10% amber powder. The soap base is a transparent vegetable glycerin soap base or an olive oil soap base.

2. A soap according to claim 1, characterized in that, The amber powder has a particle size of 100-200 meshes and has been sterilized by ultraviolet rays; the goat milk is fresh goat milk that has been pasteurized; and the honey is natural raw honey that has not been treated with high temperatures.

3. A method for preparing soap according to claim 1, characterized in that, The following steps are involved: S1. Soap base pretreatment: Cut the soap base into 1-2 cm³ pieces, place them in a double-layer heating kettle, and control the temperature to 70-80℃ to melt; S2. Add emulsification: add goat milk and honey in sequence, maintain the temperature at 60-65°C and stir uniformly for 10-15 minutes at a stirring rate of 200-300 rpm; S3. Powder dispersion: sprinkle amber powder evenly into the mixture three times, with an interval of 2 minutes between each time, and continue stirring until no visible particles are left; S4, injection molding: inject the mixed material into the silicone mold, vibrate to remove bubbles, and place it in a 4-10℃ environment to cool and solidify for 2-3 hours; S5. Post-processing: After demoulding, place in a cool and ventilated place for 72 hours, and then package after ultraviolet surface sterilization.

4. The preparation method according to claim 3, characterized in that In step S2, vitamin E acetate is further added as an antioxidant at a concentration of 0.5-1% by weight of the soap base.

5. The preparation method according to claim 3, characterized in that In step S4, the silicone mold is pre-sprayed with a food-grade release agent, and the mold temperature is controlled at 25-30°C.

6. A soap according to any one of claims 1 to 5, characterized in that The pH value of the finished product ranges from 7.5 to 8.2, the hardness test value (ASTMD217) is 120 to 150, and the foam height (GB / T13173) is ≥15 cm.

7. A soap according to any one of claims 1 to 6, characterized in that The soap also includes 0.5-3% of plant essential oil by weight of the soap base, wherein the plant essential oil is selected from at least one of lavender essential oil, chamomile essential oil or tea tree essential oil.

8. A soap according to claim 7, characterized in that, The plant essential oil is lavender essential oil, the addition amount of which is 1-2% of the weight of the soap base, and the linalool content of the lavender essential oil is ≥25% (GC detection).

9. The method for preparing soap according to any one of claims 3 to 5, characterized in that: The step S3 includes the following staged additions: (a) Add amber powder to the mixture in two portions, with the first addition amount being 60-70% of the total amber powder, and the remaining amount being added after an interval of 2 minutes; (b) immediately injecting 40-60% of the total amount of plant essential oil after each addition of amber powder, controlling the stirring temperature to 50-55°C, and extending the total stirring time to 12-18 minutes; (c) The weight ratio of the plant essential oil to the amber powder is 1:(0.5-2).

10. The soap according to claim 7, characterized in that: The step S3 further includes a coloring step: adding 0.1-0.5% of a natural pigment to the mixed solution, and stirring at a high speed of 600-800 rpm for 2-4 minutes, wherein the natural pigment is lithospermum root extract or curcumin.

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