CN112226054B - Lubricating strip for shaver, preparation method of lubricating strip and shaver - Google Patents
Lubricating strip for shaver, preparation method of lubricating strip and shaver Download PDFInfo
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- CN112226054B CN112226054B CN202010944238.5A CN202010944238A CN112226054B CN 112226054 B CN112226054 B CN 112226054B CN 202010944238 A CN202010944238 A CN 202010944238A CN 112226054 B CN112226054 B CN 112226054B
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L67/00—Compositions of polyesters obtained by reactions forming a carboxylic ester link in the main chain; Compositions of derivatives of such polymers
- C08L67/04—Polyesters derived from hydroxycarboxylic acids, e.g. lactones
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B26—HAND CUTTING TOOLS; CUTTING; SEVERING
- B26B—HAND-HELD CUTTING TOOLS NOT OTHERWISE PROVIDED FOR
- B26B19/00—Clippers or shavers operating with a plurality of cutting edges, e.g. hair clippers, dry shavers
- B26B19/38—Details of, or accessories for, hair clippers, or dry shavers, e.g. housings, casings, grips, guards
- B26B19/40—Lubricating
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/02—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group
- C08L2205/025—Polymer mixtures characterised by other features containing two or more polymers of the same C08L -group containing two or more polymers of the same hierarchy C08L, and differing only in parameters such as density, comonomer content, molecular weight, structure
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/03—Polymer mixtures characterised by other features containing three or more polymers in a blend
- C08L2205/035—Polymer mixtures characterised by other features containing three or more polymers in a blend containing four or more polymers in a blend
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L2205/00—Polymer mixtures characterised by other features
- C08L2205/14—Polymer mixtures characterised by other features containing polymeric additives characterised by shape
- C08L2205/16—Fibres; Fibrils
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- Chemical & Material Sciences (AREA)
- Health & Medical Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Medicinal Chemistry (AREA)
- Polymers & Plastics (AREA)
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Abstract
The invention provides a lubricating strip for a shaver, a preparation method thereof and the shaver, wherein the lubricating strip for the shaver is prepared from polylactic acid porous materials, water-soluble lubricants, carbon fibers and chitin fibers. The polylactic acid porous material is a degradable material with a porous structure, and the water-soluble lubricant filled in the porous structure can release part of the porous structure to play a role in lubrication; the carbon fiber can greatly improve the strength of the lubricating strip to prevent the lubricating strip from generating expansion deformation after meeting water, the chitin fiber not only can play a role in increasing the strength, but also contains a large amount of polar groups such as hydroxyl, amino and the like, and the compatibility between the carbon fiber and the polylactic acid can be greatly improved. Therefore, the invention provides the lubricating strip for the shaver, which is degradable, can maintain good lubricating performance and can prevent swelling deformation by the complementary action of the substances in the raw materials.
Description
Technical Field
The invention relates to the technical field of lubricating reagents, in particular to a lubricating strip for a shaver, a preparation method of the lubricating strip and the shaver.
Background
The common shaver is cheaper than the electric shaver. However, when shaving, the skin is easily scratched by the sharp blade, a lubricating fluid or soap bubbles needs to be applied to prevent the skin from being damaged by the shaver, the running resistance of the shaver is reduced, and after shaving, skin cream is applied to protect the skin, so that the whole shaving process is complicated in operation steps and takes a long time.
In order to overcome the disadvantages of the common shaver, a lubricating strip for the shaver is provided, which can play a role of lubricating during shaving so as to make the skin feel smooth and painless. However, most of the existing lubricating strips for shavers aim at the lubricating effect, the content of the water-soluble lubricant in the lubricating strip is increased, so that the lubricating strip can expand and deform after meeting water each time, the lubricating strip is easy to damage, and if the content of the water-soluble lubricant is reduced, the lubricating performance of the lubricating strip is greatly reduced, and the using effect is poor. Therefore, most of the existing lubricating strips for shavers are difficult to balance the performances of deformation and lubrication.
Disclosure of Invention
The invention aims to provide a lubricating strip for a shaver, which can prevent the lubricating strip from deforming and maintain good lubricity.
In order to achieve the above object, the technical solution provided by the first aspect of the present invention is a lubricating strip for a shaver, which is prepared from polylactic acid porous material, water-soluble lubricant, carbon fiber and chitin fiber.
The polylactic acid porous material in the preparation raw materials of the lubricating strip for the shaver is a degradable material with a porous structure and can be used as a slow release carrier, the water-soluble lubricant filled in the porous structure can release parts from the porous structure to play a lubricating effect when the shaver is used by being soaked with water, so that the skin can feel smooth and painless when shaving, and when the shaver is used again after being dried, the water-soluble lubricant can release parts again to meet the requirement of repeated use; the carbon fiber and the chitin fiber are added, the carbon fiber can greatly improve the strength of the lubricating strip for the shaver so as to prevent the lubricating strip for the shaver from being damaged due to expansion and deformation after meeting water, the chitin fiber not only can play a role in improving the strength, but also contains a large number of polar groups such as hydroxyl, amino and the like, and the compatibility between the carbon fiber and the polylactic acid can be greatly improved; meanwhile, the chitin fiber is a natural polymer material, has the characteristic of biodegradability and has a good antibacterial effect. Therefore, the lubricating strip for the shaver is degradable, can maintain good lubricating performance and can prevent expansion deformation by taking the polylactic acid porous material, the water-soluble lubricant, the carbon fiber and the chitin fiber as the preparation raw materials and by the complementary action among the substances.
Further, the preparation raw materials comprise, by weight, 50-70 parts of a polylactic acid porous material, 10-20 parts of a water-soluble lubricant, 1-10 parts of carbon fibers and 1-10 parts of chitin fibers. More specifically, the polylactic acid porous material may be, but not limited to, 50 parts, 53 parts, 55 parts, 58 parts, 60 parts, 62 parts, 66 parts, 68 parts, 70 parts, the water-soluble lubricant may be, but not limited to, 10 parts, 11 parts, 13 parts, 14 parts, 16 parts, 18 parts, 20 parts, the carbon fiber may be, but not limited to, 1 part, 2 parts, 3 parts, 5 parts, 7 parts, 9 parts, 10 parts, and the chitin fiber may be, but not limited to, 1 part, 2 parts, 3 parts, 5 parts, 7 parts, 9 parts, 10 parts. The content of the water-soluble lubricant is 10-20 parts, the content of the water-soluble lubricant is high, the lubricating strip for the shaver can be repeatedly used, and the problem that the lubricating strip for the shaver is expanded and deformed after the water-soluble lubricant with high content meets water can be solved by adopting 1-10 parts of carbon fiber and 1-10 parts of chitin fiber.
Furthermore, the porosity of the polylactic acid porous material is 70-82%, and the porous material is high in porosity and can be used for filling more water-soluble lubricants so as to realize repeated use of the lubricating strip for the shaver.
Further, the polylactic acid porous material is prepared by preparing a polylactic acid blend from polylactic acid and a pore-forming agent through a solution casting method, removing the pore-forming agent and drying, wherein the polylactic acid is a mixture of levorotatory polylactic acid and dextrorotatory polylactic acid. The levorotatory polylactic acid, the dextrorotatory polylactic acid and the pore-foaming agent are subjected to solution casting, and a network-shaped polylactic acid three-dimensional composite crystal is formed in the solution blending process, so that the lubricating strip has excellent mechanical property and hydrolysis resistance, the degradation speed of the lubricating strip for the shaver can be reduced, and the service life of the lubricating strip for the shaver can be prolonged. The polylactic acid and the pore-forming agent are prepared into the polylactic acid blend through a solution casting method, which comprises the steps of respectively dissolving levorotatory polylactic acid and dextrorotatory polylactic acid in a solvent, stirring to obtain a levorotatory polylactic acid solution and a dextrorotatory polylactic acid solution, mixing the levorotatory polylactic acid solution and the dextrorotatory polylactic acid solution, stirring for 2-48 hours, adding pore-forming agent particles, stirring until the pore-forming agent particles do not sink, stopping stirring, and casting the solution, wherein the solvent is dichloromethane, trichloromethane, tetrahydrofuran, carbon tetrachloride or hexafluoroisopropanol, and preferably dichloromethane. The method for removing the porogen in the polylactic acid blend is to dissolve and remove the porogen by using a solvent, wherein the solvent includes but is not limited to deionized water, methanol or ethanol, and preferably deionized water. Furthermore, the weight ratio of the levorotatory polylactic acid to the dextrorotatory polylactic acid is 1: 9-9: 1, and the weight ratio of the polylactic acid to the pore-foaming agent is 1: 6-1: 2. The pore-forming agent is selected from at least one of sodium chloride, glucose, sodium citrate, sucrose and calcium carbonate, and is preferably sodium chloride.
Further, the water-soluble lubricant is polyacrylamide or polyethylene glycol, preferably polyethylene glycol, which contains more hydroxyl groups and has better compatibility with polylactic acid and chitin fibers containing hydroxyl groups.
The technical scheme provided by the second aspect of the invention is a preparation method of a lubricating strip for a shaver, which comprises the following steps: and mixing the polylactic acid porous material, the water-soluble lubricant, the carbon fiber and the chitin fiber at a high speed, extruding, granulating and injection molding. The components can be uniformly mixed and the water-soluble lubricant, the carbon fiber and the chitin fiber can be uniformly fused into the polylactic acid porous material through high-speed mixing and granulation.
The technical scheme provided by the third aspect of the invention is that the shaver comprises a shaver handle, a shaver holder and a blade arranged on the shaver holder, wherein the shaver holder is provided with the lubricating strip for the shaver or the lubricating strip for the shaver prepared by the preparation method of the lubricating strip for the shaver.
Detailed Description
The lubricating strip for the shaver is prepared from polylactic acid porous materials, a water-soluble lubricant, carbon fibers and chitin fibers. Of course, in order to meet the requirements of different users, different pigments can be added into the raw materials for preparing the lubricating strip for the shaver to prepare lubricating strips with different colors, or perfumes with different smells are added to increase the olfactory interest. The lubricating strip for the shaver can be integrally injection-molded with the shaver holder of the shaver, and can also be detachably mounted on the shaver holder, so that the requirement of long-term recycling of the main body part of the shaver is met, and the cost is saved.
To better illustrate the objects, technical solutions and advantages of the present invention, the present invention will be further described with reference to specific examples. It should be noted that the following implementation of the method is a further explanation of the present invention, and should not be taken as a limitation of the present invention.
Example 1
A lubricating strip for a shaver is prepared from 60 parts of polylactic acid porous material, 20 parts of polyacrylamide, 5 parts of carbon fiber and 4 parts of chitin fiber.
The preparation method of the polylactic acid porous material comprises the steps of respectively dissolving levorotatory polylactic acid and dextrorotatory polylactic acid with equal weight into a dichloromethane solvent to obtain a polylactic acid solution, mixing the two polylactic acid solutions, stirring for 10 hours, adding a sodium chloride pore-forming agent (the mass ratio of the pore-forming agent to the total amount of the polylactic acid is 3:1), stirring until sodium chloride particles do not sink, casting the solution, washing with deionized water after the solvent is volatilized to remove the pore-forming agent, and drying to obtain the polylactic acid porous material with the porosity of 78%.
The preparation method of the lubricating strip for the shaver comprises the following steps: mixing the polylactic acid porous material, the polyacrylamide, the carbon fiber and the chitin fiber according to the formula ratio at a high speed, extruding and granulating, and performing injection molding.
Example 2
A lubricating strip for a shaver is prepared from 50 parts of polylactic acid porous material, 10 parts of polyacrylamide, 5 parts of carbon fiber and 1 part of chitin fiber.
The preparation method of the polylactic acid porous material comprises the steps of respectively dissolving levorotatory polylactic acid and dextrorotatory polylactic acid with equal weight in a dichloromethane solvent to obtain a polylactic acid solution, mixing the two polylactic acid solutions, stirring, adding a sodium chloride pore-forming agent (the mass ratio of the pore-forming agent to the total amount of the polylactic acid is 3:1), stirring until sodium chloride particles do not sink, carrying out solution casting, washing with deionized water after the solvent is volatilized to remove the pore-forming agent, and drying to obtain the polylactic acid porous material with the porosity of 78%.
The preparation method of the lubricating strip for the shaver comprises the following steps: mixing the polylactic acid porous material, the polyacrylamide, the carbon fiber and the chitin fiber according to the formula ratio at a high speed, extruding and granulating, and performing injection molding.
Example 3
A lubricating strip for a shaver is prepared from 70 parts of polylactic acid porous material, 15 parts of polyacrylamide, 10 parts of carbon fiber and 10 parts of chitin fiber.
The preparation method of the polylactic acid porous material comprises the steps of respectively dissolving levorotatory polylactic acid and dextrorotatory polylactic acid with equal weight in a dichloromethane solvent to obtain a polylactic acid solution, mixing the two polylactic acid solutions, stirring, adding a sodium chloride pore-forming agent (the mass ratio of the pore-forming agent to the total amount of the polylactic acid is 3:1), stirring until sodium chloride particles do not sink, carrying out solution casting, washing with deionized water after the solvent is volatilized to remove the pore-forming agent, and drying to obtain the polylactic acid porous material with the porosity of 78%.
The preparation method of the lubricating strip for the shaver comprises the following steps: mixing the polylactic acid porous material, the polyacrylamide, the carbon fiber and the chitin fiber according to the formula ratio at a high speed, extruding and granulating, and performing injection molding.
Example 4
A lubricating strip for a shaver is prepared from 60 parts of polylactic acid porous material, 20 parts of polyacrylamide, 5 parts of carbon fiber and 4 parts of chitin fiber.
The preparation method of the polylactic acid porous material comprises the steps of respectively dissolving levorotatory polylactic acid and dextrorotatory polylactic acid in a dichloromethane solvent according to a weight ratio of 2:1 to obtain a polylactic acid solution, mixing the two polylactic acid solutions, stirring, adding a sodium chloride pore-forming agent (the mass ratio of the pore-forming agent to the total amount of the polylactic acid is 4:1), stirring until sodium chloride particles do not sink, casting the solution, washing with deionized water after the solvent is volatilized to remove the pore-forming agent, and drying to obtain the polylactic acid porous material with the porosity of 82%.
The preparation method of the lubricating strip for the shaver comprises the following steps: mixing the polylactic acid porous material, the polyacrylamide, the carbon fiber and the chitin fiber according to the formula ratio at a high speed, extruding and granulating, and performing injection molding.
Example 5
A lubricating strip for a shaver is prepared from 60 parts of polylactic acid porous material, 20 parts of polyacrylamide, 5 parts of carbon fiber and 4 parts of chitin fiber.
The preparation method of the polylactic acid porous material comprises the steps of respectively dissolving levorotatory polylactic acid and dextrorotatory polylactic acid with equal weight into dichloromethane solvent to obtain polylactic acid solution, mixing the two polylactic acid solutions, stirring, adding a glucose pore-forming agent (the mass ratio of the pore-forming agent to the total amount of the polylactic acid is 3:1), stirring until glucose particles do not sink, casting the solution, washing with deionized water after the solvent is volatilized to remove the pore-forming agent, and drying to obtain the polylactic acid porous material with the porosity of 72%.
The preparation method of the lubricating strip for the shaver comprises the following steps: mixing the polylactic acid porous material, the polyacrylamide, the carbon fiber and the chitin fiber according to the formula ratio at a high speed, extruding and granulating, and performing injection molding.
Example 6
A lubricating strip for a shaver is prepared from 60 parts of polylactic acid porous material, 20 parts of polyethylene glycol, 5 parts of carbon fiber and 4 parts of chitin fiber.
The preparation method of the polylactic acid porous material comprises the steps of respectively dissolving levorotatory polylactic acid and dextrorotatory polylactic acid with equal weight in a dichloromethane solvent to obtain a polylactic acid solution, mixing the two polylactic acid solutions, stirring, adding a sodium chloride pore-forming agent (the mass ratio of the pore-forming agent to the total amount of the polylactic acid is 3:1), stirring until sodium chloride particles do not sink, carrying out solution casting, washing with deionized water after the solvent is volatilized to remove the pore-forming agent, and drying to obtain the polylactic acid porous material with the porosity of 78%.
The preparation method of the lubricating strip for the shaver comprises the following steps: mixing the polylactic acid porous material, the polyethylene glycol, the carbon fiber and the chitin fiber according to the formula ratio at a high speed, extruding and granulating, and performing injection molding.
Comparative example 1
A lubricating strip for a shaver is prepared from 60 parts of polylactic acid porous material and 20 parts of polyacrylamide.
The preparation method of the polylactic acid porous material comprises the steps of respectively dissolving levorotatory polylactic acid and dextrorotatory polylactic acid with equal weight in a dichloromethane solvent to obtain a polylactic acid solution, mixing the two polylactic acid solutions, stirring, adding a sodium chloride pore-forming agent (the mass ratio of the pore-forming agent to the total amount of the polylactic acid is 3:1), stirring until sodium chloride particles do not sink, carrying out solution casting, washing with deionized water after the solvent is volatilized to remove the pore-forming agent, and drying to obtain the polylactic acid porous material with the porosity of 78%.
The preparation method of the lubricating strip for the shaver comprises the following steps: mixing the polylactic acid porous material and polyacrylamide according to the formula ratio at a high speed, extruding and granulating, and performing injection molding.
Comparative example 2
A lubricating strip for a shaver is prepared from 60 parts of polylactic acid porous material, 20 parts of polyacrylamide and 4 parts of chitin fiber.
The preparation method of the polylactic acid porous material comprises the steps of respectively dissolving levorotatory polylactic acid and dextrorotatory polylactic acid with equal weight in a dichloromethane solvent to obtain a polylactic acid solution, mixing the two polylactic acid solutions, stirring, adding a sodium chloride pore-forming agent (the mass ratio of the pore-forming agent to the total amount of the polylactic acid is 3:1), stirring until sodium chloride particles do not sink, carrying out solution casting, washing with deionized water after the solvent is volatilized to remove the pore-forming agent, and drying to obtain the polylactic acid porous material with the porosity of 78%.
The preparation method of the lubricating strip for the shaver comprises the following steps: the polylactic acid porous material, the polyacrylamide and the chitin fiber with the formula ratio are mixed at a high speed, extruded and granulated, and injection molded.
Comparative example 3
A lubricating strip for a shaver is prepared from 60 parts of polylactic acid porous material, 20 parts of polyacrylamide and 5 parts of carbon fiber.
The preparation method of the polylactic acid porous material comprises the steps of respectively dissolving levorotatory polylactic acid and dextrorotatory polylactic acid with equal weight into dichloromethane solvent to obtain polylactic acid solution, mixing the two polylactic acid solutions, stirring, adding sodium chloride pore-forming agent (the mass ratio of the pore-forming agent to the total amount of the polylactic acid is 3:1), stirring until sodium chloride particles do not sink, casting the solution, washing with deionized water after the solvent is volatilized to remove the pore-forming agent, and drying to obtain the polylactic acid porous material with the porosity of 78%.
The preparation method of the lubricating strip for the shaver comprises the following steps: mixing the polylactic acid porous material, polyacrylamide and carbon fiber according to the formula ratio at a high speed, extruding and granulating, and performing injection molding.
The lubricating strips for shavers of examples 1 to 6 and comparative examples 1 to 3 were subjected to a degree of lubrication test using a dynamic friction coefficient measuring device MXZ-1, and the results of the dynamic friction coefficients are shown in Table 1. The lubricating strips for shavers of examples 1 to 6 and comparative examples 1 to 3 were subjected to tensile strength tests, and the results are shown in table 1.
TABLE 1 test results of lubricating strips for shavers of examples 1 to 6 and comparative examples 1 to 3
As can be seen from the results in table 1, in the lubricating strips for a shaver obtained in examples 1 to 6, the polylactic acid porous material, the water-soluble lubricant, the carbon fiber and the chitin fiber are used as the raw materials for preparation, and the supplementary functions among the substances enable the prepared lubricating strips to have high tensile strength while maintaining good lubricating performance, and the chitin fiber also has good bacteriostatic action and biodegradability, so that the lubricating strips for a shaver prepared from the raw materials for preparation of the present invention have both degradability and bacteriostatic property, and have high strength to meet repeated use of the shaver.
Comparative examples 1 to 3 contain either no fiber material or only carbon fiber or chitin fiber, and thus have a limited increase in strength of the lubricating strip for a shaver. In addition, the comparative example 3 only contains carbon fibers but does not contain chitin fibers, so that the compatibility among the components is poor, the friction coefficient of the lubricating strip for the shaver is high, and the lubricating performance is poor.
Comparing example 1 and example 6, it is known that when polyethylene glycol is selected as the water-soluble lubricant, compared to polyacrylamide, it contains more hydroxyl groups, and is more compatible with polylactic acid and chitin fibers, both of which contain hydroxyl groups, and thus has better lubricating properties and strength.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the protection scope of the present invention, and although the present invention is described in detail with reference to the preferred embodiments, it is not limited to the embodiments, and those skilled in the art should understand that the technical solutions of the present invention can be modified or substituted with equivalents without departing from the spirit and scope of the technical solutions of the present invention.
Claims (7)
1. The lubricating strip for the shaver is characterized by comprising, by weight, 50-70 parts of a polylactic acid porous material, 10-20 parts of a water-soluble lubricant, 1-10 parts of carbon fibers and 1-10 parts of chitin fibers, wherein the water-soluble lubricant is polyacrylamide or polyethylene glycol.
2. The lubricating strip for a shaver as set forth in claim 1, wherein the porosity of the porous polylactic acid material is 70 to 82%.
3. The lubricating strip for the shaver according to claim 1, wherein the polylactic acid porous material is prepared by preparing a polylactic acid blend from polylactic acid and a pore-forming agent by a solution casting method, removing the pore-forming agent and then drying, and the polylactic acid is a mixture of L-polylactic acid and D-polylactic acid.
4. The lubricating strip for a shaver as claimed in claim 3, wherein the weight ratio of the L-polylactic acid to the D-polylactic acid is 1: 9-9: 1, and the weight ratio of the polylactic acid to the pore-forming agent is 1: 6-1: 2.
5. The lubricating strip for a shaver as set forth in claim 3, wherein the pore-forming agent is selected from at least one of sodium chloride, glucose, sodium citrate, sucrose, and calcium carbonate.
6. The method for producing a lubricating strip for a shaver as set forth in any one of claims 1 to 5, comprising the steps of: mixing the polylactic acid porous material, the water-soluble lubricant, the carbon fiber and the chitin fiber at a high speed, extruding, granulating and injection molding.
7. A shaver, comprising a handle, a holder and a blade mounted on the holder, characterized in that the holder is provided with the lubricating strip for a shaver according to any one of claims 1 to 5 or the lubricating strip for a shaver prepared by the method for preparing the lubricating strip for a shaver according to claim 6.
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| CN112917518A (en) * | 2021-01-21 | 2021-06-08 | 温州美葆剃须系统有限公司 | Razor head with quick-mounting and-dismounting blade |
| CN114058165B (en) * | 2021-11-04 | 2022-10-28 | 泰世德(北京)医药科技有限公司 | Piezoelectric polylactic acid material and preparation method and application thereof |
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| US5653971A (en) * | 1995-06-30 | 1997-08-05 | The Gillette Company | Shaving aid composite with an inclusion complex of a skin-soothing agent and a cyclodextrin |
| CN102115572B (en) * | 2010-12-27 | 2012-12-19 | 宁波大学 | Lubricating strip for shaver and shaver provided with same |
| CN105219007B (en) * | 2015-09-11 | 2018-01-02 | 上海天封科技有限公司 | A kind of shaver lubricious strip |
| CN107670108A (en) * | 2017-09-27 | 2018-02-09 | 四川大学 | A kind of tissue engineering bracket polylactic acid porous material and preparation method thereof |
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