Full-bio-based impregnated glove and preparation method thereof
By using bio-based fibers and latex to prepare fully bio-based dipped gloves, the problem of rising costs of natural latex raw materials has been solved, and improvements in wear resistance, cutting performance, and flexibility have been achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- NANTONG QIANGSHENG SAFETY PROTECTION TECHNOLOGY CO LTD
- Filing Date
- 2024-11-12
- Publication Date
- 2026-05-12
AI Technical Summary
Existing dipped gloves use natural latex raw materials, which leads to harsh planting environments and increased costs. There is a need to develop fully bio-based dipped gloves to promote the sustainable development of the industry.
Glove blanks were prepared using bio-based fibers, impregnated with bio-based latex, and pre-vulcanized using a vulcanization process formulated with bio-based latex to prepare fully bio-based impregnated gloves.
It achieves excellent abrasion resistance, cutting performance, and flexibility, realizing the sustainable development of dipped gloves.
Abstract
Description
Technical Field
[0001] This invention relates to the field of security glove technology, specifically to a fully bio-based dipped glove and its preparation method. Background Technology
[0002] Latex-coated gloves, also known as rubber gloves, are made of fabric lining and a latex coating. They are widely used as hand protection products in industrial and agricultural production, medical care, and daily life. Current latex coatings in dipped gloves typically use natural latex as the main raw material. Natural latex comes almost entirely from the rubber tree (Hevea brasiliensis), whose cultivation environment is demanding, leading to rising natural rubber prices and increased costs in recent years. Therefore, developing fully bio-based dipped gloves to replace natural latex and promoting the sustainable development of the dipped glove industry is of great significance. Summary of the Invention
[0003] To address the shortcomings of existing technologies, the present invention aims to provide a fully bio-based dipped glove and its preparation method.
[0004] The objective of this invention is achieved through the following technical solution:
[0005] In a first aspect, the present invention provides a method for preparing a fully bio-based dipped glove, comprising the following steps:
[0006] A. Prepare bio-based latex and wet materials for vulcanization process;
[0007] B. Glove blanks are woven from fully bio-based blended yarns;
[0008] C. After preheating the glove blank on the mold, immerse it in the coagulant for coagulant treatment;
[0009] D. Immerse the mold treated with coagulant into bio-based latex for impregnation treatment;
[0010] E. Immerse the dipped mold in the wet material for the vulcanization process for pre-vulcanization treatment, and then dry it to obtain the fully bio-based dipped gloves.
[0011] As a preferred embodiment, in step A, the bio-based latex comprises the following components in the following mass percentages: 80-95% bio-based rubber, 1-5% diluent, and the remainder being water.
[0012] As a preferred embodiment, the bio-based rubber is selected from at least one of bio-based isoprene rubber, bio-based ethylene propylene rubber, bio-based cis-butadiene rubber, galbac rubber, dandelion rubber, eucommia rubber, recycled ethylene propylene diene monomer (EPDM) rubber, and bio-based itaconic acid ester rubber.
[0013] As a preferred embodiment, in step A, the wet material used in the vulcanization process comprises the following components in the following mass percentages: 30-60% bio-based latex, 10-30% KOH, 20-50% sulfur, 2-5% accelerator, 1.5-5.5% antioxidant, and 3-6% zinc oxide.
[0014] As a preferred embodiment, the accelerator is selected from at least one of 3-methylthiazolidinyl thion-2, 1-(N-oxodiethylthiocarbamoyl)-2-(N-oxodiethylthiobenzimidazole), dibenzothiazole disulfide, and zinc diethyldithiocarbamate.
[0015] As a preferred embodiment, the antioxidant is selected from at least one of 2,2,4-trimethyl-1,2-dihydroquinoline, N-isopropyl-N-phenylphenyldiamine, and 2,2′-methylenebis-(4-methyl-6-tert-butylphenol).
[0016] As a preferred embodiment, in step B, the fully bio-based blended yarn is obtained by blending bio-based nylon fibers with bio-based spandex.
[0017] As a preferred embodiment, the bio-based nylon fiber is selected from at least one of bio-based nylon 56 fiber, bio-based nylon 6 fiber, and bio-based nylon 66 fiber.
[0018] As a preferred embodiment, in step C, the preheating temperature is 35-60℃.
[0019] As a preferred embodiment, the coagulant is any one of calcium nitrate, calcium chloride, and zinc chloride mixed with methanol or ethanol.
[0020] As a preferred embodiment, in step E, the drying temperature is 70-120℃ and the drying time is 0.5-3h.
[0021] Secondly, the present invention provides a fully bio-based dipped glove prepared according to the aforementioned method.
[0022] Compared with the prior art, the present invention has the following beneficial effects:
[0023] This invention prepares a fully bio-based dipped glove by using bio-based fibers to prepare a bio-based yarn glove blank, impregnating it with bio-based latex, and pre-vulcanizing it with a vulcanization process using wet material containing bio-based latex. The glove exhibits excellent abrasion resistance, cutting performance, and flexibility. Detailed Implementation
[0024] Unless otherwise defined, the technical or scientific terms used in this specification and claims shall have the ordinary meaning understood by one of ordinary skill in the art to which this application pertains. All values listed herein, ranging from the minimum to the maximum, refer to all values obtained by incrementing the minimum and maximum values by one unit when the difference between the minimum and maximum values is more than two units.
[0025] The following describes specific embodiments of this application. It should be noted that, in order to provide a concise description, this specification cannot provide a detailed description of all features of the actual embodiments. Without departing from the spirit and scope of this application, those skilled in the art can modify and substitute the embodiments of this application, and the resulting embodiments are also within the protection scope of this application.
[0026] Example
[0027] The embodiments of this application will be described in detail below. These embodiments are implemented based on the technical solution of this application, and detailed implementation methods and specific operation processes are given. However, the protection scope of this application is not limited to the following embodiments.
[0028] In the following embodiments, all raw materials and reagents used were prepared by conventional methods or obtained by purchasing commercially available products. This invention does not impose any special limitations.
[0029] Example 1
[0030] This embodiment provides a method for preparing a fully bio-based dipped glove, including the following steps:
[0031] 1) Preparation of bio-based latex: Mix 90% bio-based ethylene propylene rubber, 3% diluent (propylene glycol) and 7% water by mass percentage, and stir evenly to obtain bio-based latex.
[0032] 2) Prepare the wet material for the vulcanization process: According to the mass percentage content, mix 45% of the bio-based latex prepared in step 1), 15% of KOH, 30% of sulfur, 3% of accelerator (3-methylthiazolidin-thion-2), 3% of antioxidant (N-isopropyl-N-phenylphenyldiamine), and 4% of zinc oxide, and stir evenly to obtain the wet material for the vulcanization process.
[0033] 3) Prepare the coagulant: Mix 10% calcium nitrate with 90% ethanol by mass percentage to obtain the coagulant.
[0034] 4) Preparation of fully bio-based blended yarn: Bio-based nylon 6 fiber and bio-based spandex are blended to obtain fully bio-based blended yarn.
[0035] 5) Preparation of glove blank: The bio-based blended yarn is knitted into a glove blank using a 15-gauge knitting method;
[0036] 6) Coagulant treatment: After preheating the glove blank to 45°C by placing it on the hand mold, immerse the hand mold in the coagulant for coagulant treatment.
[0037] 7) Impregnation treatment: Immerse the hand mold treated in step 6) into bio-based latex for impregnation treatment;
[0038] 8) Vulcanization treatment: Immerse the hand mold treated in step 7) into the wet material for vulcanization process for pre-vulcanization treatment, and then put it in an oven to dry at 90°C for 1 hour for vulcanization treatment to obtain the fully bio-based dipped gloves.
[0039] Example 2
[0040] This embodiment provides a method for preparing a fully bio-based dipped glove, including the following steps:
[0041] 1) Preparation of bio-based latex: Mix 80% bio-based ethylene propylene rubber, 5% diluent (propylene glycol) and 15% water by mass percentage, and stir evenly to obtain bio-based latex.
[0042] 2) Prepare the wet material for the vulcanization process: According to the mass percentage content, mix 30% of the bio-based latex prepared in step 1), 10% of KOH, 50% of sulfur, 2.5% of accelerator (3-methylthiazolidinyl-thion-2), 1.5% of antioxidant (N-isopropyl-N-phenylphenyldiamine), and 6% of zinc oxide, and stir evenly to obtain the wet material for the vulcanization process.
[0043] 3) Prepare the coagulant: Mix 10% calcium nitrate with 90% ethanol by mass percentage to obtain the coagulant.
[0044] 4) Preparation of fully bio-based blended yarn: Bio-based nylon 56 fiber and bio-based spandex are blended to obtain fully bio-based blended yarn.
[0045] 5) Preparation of glove blank: The bio-based blended yarn is knitted into a glove blank using a 15-gauge knitting method;
[0046] 6) Coagulant treatment: After preheating the glove blank to 60°C by placing it on the hand mold, immerse the hand mold in the coagulant for coagulant treatment.
[0047] 7) Impregnation treatment: Immerse the hand mold treated in step 6) into bio-based latex for impregnation treatment;
[0048] 8) Vulcanization treatment: Immerse the hand mold treated in step 7) into the wet material for vulcanization process for pre-vulcanization treatment, and then put it in an oven to dry at 120°C for 0.5h for vulcanization treatment to obtain the fully bio-based dipped gloves.
[0049] Example 3
[0050] This embodiment provides a method for preparing a fully bio-based dipped glove, including the following steps:
[0051] 1) Preparation of bio-based latex: Mix 85% bio-based ethylene propylene rubber, 2% diluent (propylene glycol) and 13% water by mass percentage, and stir evenly to obtain bio-based latex.
[0052] 2) Preparation of wet material for vulcanization process: By mass percentage, mix 51.5% of the bio-based latex prepared in step 1), 18% KOH, 20% sulfur, 2% accelerator (3-methylthiazolidinyl-thion-2), 5.5% antioxidant (N-isopropyl-N-phenylphenyldiamine), and 3% zinc oxide, and stir evenly to obtain wet material for vulcanization process.
[0053] 3) Prepare the coagulant: Mix 10% calcium nitrate with 90% ethanol by mass percentage to obtain the coagulant.
[0054] 4) Preparation of fully bio-based blended yarn: Bio-based nylon 66 fiber and bio-based spandex are blended to obtain fully bio-based blended yarn.
[0055] 5) Preparation of glove blank: The bio-based blended yarn is knitted into a glove blank using a 15-gauge knitting method;
[0056] 6) Coagulant treatment: After preheating the glove blank to 45°C by placing it on the hand mold, immerse the hand mold in the coagulant for coagulant treatment.
[0057] 7) Impregnation treatment: Immerse the hand mold treated in step 6) into bio-based latex for impregnation treatment;
[0058] 8) Vulcanization treatment: Immerse the hand mold treated in step 7) into the wet material for vulcanization process for pre-vulcanization treatment, and then put it in an oven to dry at 100°C for 1 hour for vulcanization treatment to obtain the fully bio-based dipped gloves.
[0059] Example 4
[0060] This embodiment provides a method for preparing a fully bio-based dipped glove, including the following steps:
[0061] 1) Preparation of bio-based latex: Mix 95% bio-based ethylene propylene rubber, 1% diluent (propylene glycol) and 4% water by mass percentage, and stir evenly to obtain bio-based latex.
[0062] 2) Prepare wet material for vulcanization process: Mix 36% of the bio-based latex prepared in step 1), 30% KOH, 25% sulfur, 5% accelerator (3-methylthiazolidinyl-thion-2), 2% antioxidant (N-isopropyl-N-phenylphenyldiamine), and 2% zinc oxide by mass percentage, and stir evenly to obtain wet material for vulcanization process.
[0063] 3) Prepare the coagulant: Mix 15% calcium chloride with 85% ethanol by mass percentage to obtain the coagulant.
[0064] 4) Preparation of fully bio-based blended yarn: Bio-based nylon 56 fiber and bio-based spandex are blended to obtain fully bio-based blended yarn.
[0065] 5) Preparation of glove blank: The bio-based blended yarn is knitted into a glove blank using a 15-gauge knitting method;
[0066] 6) Coagulant treatment: After preheating the glove blank to 45°C by placing it on the hand mold, immerse the hand mold in the coagulant for coagulant treatment.
[0067] 7) Impregnation treatment: Immerse the hand mold treated in step 6) into bio-based latex for impregnation treatment;
[0068] 8) Vulcanization treatment: Immerse the hand mold treated in step 7) into the wet material for vulcanization process for pre-vulcanization treatment, and then put it in an oven to dry at 70°C for 2 hours for vulcanization treatment to obtain the fully bio-based dipped gloves.
[0069] Example 5
[0070] This embodiment provides a method for preparing a fully bio-based dipped glove. The specific steps are basically the same as those in Embodiment 1, except that in this embodiment, silver guar gum rubber is used instead of bio-based ethylene propylene rubber.
[0071] Example 6
[0072] This embodiment provides a method for preparing a fully bio-based dipped glove. The specific steps are basically the same as those in Embodiment 1, except that dandelion rubber is used instead of bio-based ethylene propylene rubber in this embodiment.
[0073] Example 7
[0074] This embodiment provides a method for preparing a fully bio-based dipped glove. The specific steps are basically the same as those in Embodiment 1, except that in this embodiment, bio-based isoprene rubber is used instead of bio-based ethylene propylene rubber.
[0075] Example 8
[0076] This embodiment provides a method for preparing a fully bio-based dipped glove. The specific steps are basically the same as those in Embodiment 1, except that in this embodiment, Eucommia ulmoides gum is used instead of bio-based ethylene propylene rubber.
[0077] Comparative Example 9
[0078] This comparative example provides a method for preparing a fully bio-based dipped glove. The specific steps are basically the same as those in Example 4, except that: in this comparative example, step 4) is not performed, and bio-based nylon 56 fiber is used instead of bio-based blended yarn in step 5).
[0079] Comparative Example 10
[0080] This comparative example provides a method for preparing a fully bio-based dipped glove. The specific steps are basically the same as those in Example 4, except that: in this comparative example, step 4) is not performed, and bio-based spandex is used instead of bio-based blended yarn in step 5).
[0081] Performance testing:
[0082] The fully bio-based dipped gloves prepared using the methods in the examples and comparative examples were tested for cut resistance and abrasion resistance using the EN388:2016 method, and for flexibility level using the EN21420 standard method. The test results are shown in Table 1.
[0083] Table 1
[0084] Cut resistance rating Abrasion resistance rating Flexibility level Example 1 2 3 4 Example 2 2 3 3 Example 3 2 2 3 Example 4 2 2 4 Example 5 2 2 3 Example 6 1 2 2 Example 7 2 2 2 Example 8 2 1 3 Comparative Example 1 1 1 2 Comparative Example 2 1 2 1
[0085] The above description of the embodiments is provided to enable those skilled in the art to understand and use the invention. It will be apparent to those skilled in the art that various modifications can be made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the invention should be within the protection scope of the present invention.
Claims
1. A method for preparing a fully bio-based dipped glove, characterized in that, Includes the following steps: A. Prepare bio-based latex and wet materials for vulcanization process; B. Glove blanks are woven from fully bio-based blended yarns; C. After preheating the glove blank on the mold, immerse it in the coagulant for coagulant treatment; D. Immerse the mold treated with coagulant into bio-based latex for impregnation treatment; E. Immerse the dipped mold in the wet material for the vulcanization process for pre-vulcanization treatment, and then dry it to obtain the fully bio-based dipped gloves.
2. The method for preparing the all-bio-based dipped gloves according to claim 1, characterized in that, In step A, the bio-based latex comprises the following components in the following mass percentages: 80-95% bio-based rubber, 1-5% diluent, and the remainder is water.
3. The method for preparing the all-bio-based dipped gloves according to claim 2, characterized in that, The bio-based rubber is selected from at least one of bio-based isoprene rubber, bio-based ethylene propylene rubber, bio-based cis-butadiene rubber, guar gum rubber, dandelion rubber, eucommia gum, recycled ethylene propylene diene monomer (EPDM) rubber, and bio-based itaconic acid ester rubber.
4. The method for preparing the all-bio-based dipped gloves according to any one of claims 1-3, characterized in that, In step A, the wet material used in the vulcanization process comprises the following components in the following mass percentages: 30-60% bio-based latex, 10-30% KOH, 20-50% sulfur, 2-5% accelerator, 1.5-5.5% antioxidant, and 3-6% zinc oxide.
5. The method for preparing the all-bio-based dipped gloves according to claim 4, characterized in that, The accelerator is selected from at least one of 3-methylthiazolidin-thione-2, 1-(N-oxodiethylthiocarbamoyl)-2-(N-oxodiethylthiobenzimidazole), dibenzothiazole disulfide, and zinc diethyldithiocarbamate. The antioxidant is selected from at least one of 2,2,4-trimethyl-1,2-dihydroquinoline, N-isopropyl-N-phenylphenyldiamine, and 2,2′-methylenebis-(4-methyl-6-tert-butylphenol).
6. The method for preparing the all-bio-based dipped gloves according to claim 1, characterized in that, In step B, the fully bio-based blended yarn is obtained by blending bio-based nylon fibers with bio-based spandex.
7. The method for preparing the all-bio-based dipped gloves according to claim 6, characterized in that, The bio-based nylon fiber is selected from at least one of bio-based nylon 56 fiber, bio-based nylon 6 fiber, and bio-based nylon 66 fiber.
8. The method for preparing the all-bio-based dipped gloves according to claim 1, characterized in that, In step C, the preheating temperature is 35-60℃; The coagulant is any one of calcium nitrate, calcium chloride, and zinc chloride mixed with methanol or ethanol.
9. The method for preparing the all-bio-based dipped gloves according to claim 1, characterized in that, In step E, the drying temperature is 70-120℃ and the drying time is 0.5-3h.
10. A fully bio-based dipped glove prepared by the method according to any one of claims 1-9.