Light, thin, long tube chemical protection gloves and preparation method thereof

Abstract

This invention discloses a lightweight, long-tube chemical protective glove and its preparation method. The lightweight, long-tube chemical protective glove includes an inner glove core and a rubber compound coated on the outer layer of the glove core. The preparation method includes: glove core preparation; rubber compound preparation; glove core pretreatment; glove core impregnation; and lightweight, long-tube chemical protective glove preparation. The advantages of this invention are that the prepared long-tube chemical protective glove maintains a rapid film-forming rate while considering both abrasion resistance and chemical protection, is lighter and thinner, and offers better wearing comfort and flexibility.

Description

Technical Field

[0001] This invention relates to the field of chemical protective glove manufacturing technology, and in particular to a thin, long-tube chemical protective glove and its manufacturing method. Background Technology

[0002] International statistics show that, when workplace accidents are classified according to the injured body part, hand injuries account for about a quarter of all workplace accidents. Hand protection is particularly important in production accidents where working conditions are not ideal.

[0003] Traditional long-top chemical protective gloves offer basic protective properties such as water resistance, abrasion resistance, etc., but prolonged wear can easily lead to fatigue and discomfort. Furthermore, traditional chemical protective gloves are typically multi-layered, resulting in a thicker glove that reduces flexibility during extended wear. Summary of the Invention

[0004] The purpose of this invention is to provide a lightweight, thin, long-tube chemical protective glove and its preparation method, which can produce lightweight, thin, and highly protective long-tube chemical protective gloves.

[0005] The above-mentioned technical objective of the present invention is achieved through the following technical solution:

[0006] A lightweight, long-tube chemical-resistant glove, characterized in that it comprises an inner glove core and a rubber coating applied to the outer layer of the glove core, wherein the glove core comprises the following raw materials in parts by weight:

[0007]

[0008] The rubber compound comprises the following raw materials in parts by weight:

[0009]

[0010] Preferably, the PE precursor yarn is one or a mixture of 300D PE yarn, 400D PE yarn, and 200D PE yarn;

[0011] The nylon yarn is made of one or a blend of 50D nylon, 70D nylon, and 140D nylon;

[0012] The spandex yarn is made of one or a mixture of 140D spandex, 70D spandex, and 40D spandex.

[0013] HPPE uses one or a mixture of 100D, 200D, 400D, and 300D yarns;

[0014] The steel wire is made of one or a mixture of 0.05mm, 0.035mm, and 0.045mm.

[0015] Preferably, the preparation steps of the modified hydroxypropyl methylcellulose anti-seepage thickener include the following:

[0016] S1, the refined cotton fibers are initially pre-acidified with the organic acid oxalic acid, and then rapidly heated to decompose both simultaneously;

[0017] S2, the pre-acidified refined cotton fibers are soaked in 50% NaOH alkaline solution for 1 hour for alkalization, and the temperature is maintained at 40-45℃;

[0018] S3, the alkalized refined cotton fibers are subjected to pressure treatment, with the pressure maintained at 3 to 4 times the weight of the refined cotton fibers, and then crushed and pulverized, and aged for 24 hours after pulverization;

[0019] S4, alkalized refined cotton fibers are reacted with an etherifying agent at 25-50℃ and 0.5-1 MPa pressure for 4 hours to obtain crude hydroxypropyl methylcellulose;

[0020] S5. The etherified crude hydroxypropyl methylcellulose was soaked and washed with deionized water, then the pH was adjusted to neutral with oxalic acid, and then dried and dehydrated, and pulverized and purified to obtain modified hydroxypropyl methylcellulose.

[0021] Preferably, the etherifying agent is a mixture of ethylene oxide and chloromethane in a volume ratio of 3:2.

[0022] A method for preparing lightweight, thin, long-tube chemical protective gloves, characterized by the following steps:

[0023] Glove core preparation: a specific size hand mold is used for weaving, and a knitting machine is used to cover and weave a specific ratio of PE yarn, nylon yarn, spandex yarn, HPPE and steel wire. Ribbed weave: two high and one low, 1 spaced 1.

[0024] Rubber compound preparation: Take nitrile latex and add 5% KOH solution, 50% sulfur solution, 50% ZnO solution, 50% zinc dithiocarbamate solution as accelerator, 5% fumed silica as matting agent, water-based color paste and 5% modified hydroxypropyl methylcellulose as anti-seepage thickener in sequence. Add them to the nitrile latex by mechanical mixing, mix evenly and adjust the viscosity.

[0025] Glove core pretreatment: Insert the glove core into a long cylindrical hand mold of the corresponding size, place it in an oven at 50-65℃ for 30 minutes to preheat, remove the preheated hand mold, immerse it in the coagulant, and drip for 1-3 minutes.

[0026] Glove core dipping: Slowly and evenly immerse the glove core, which has been soaked in coagulant, into the prepared adhesive. Immerse it to a fixed position and hold for 5-10 seconds to ensure that the adhesive is fully coated on the glove core. Then, pull it out at a uniform speed and let it stand for 5-10 minutes to allow the surface to dry completely.

[0027] Preparation of lightweight long-tube chemical protective gloves: The glove cores that have been left to stand are placed in an oven and vulcanized gradually until the gloves are fully dry. Then, the gloves are vulcanized in sequence according to the step vulcanization process to obtain lightweight long-tube chemical protective gloves.

[0028] Preferably, the hand mold is 8 to 12 inches in size, the knitting machine is one of 13-needle, 15-needle, or 18-needle, and the yarn weight per 100 meters is 7 to 7.25g.

[0029] Preferably, the coagulant comprises the following raw materials in parts by weight:

[0030] Methanol solvent: 80 parts;

[0031] 95% glacial acetic acid mixture: 10 parts;

[0032] 98% calcium nitrate solution: 10 parts.

[0033] Preferably, the oven temperature in the stepwise vulcanization process is divided into three stages: pre-drying at 50-65℃ for 30 minutes, pre-vulcanizing at 90-100℃ for 45 minutes, and complete vulcanization at 110-130℃ for 1 hour.

[0034] Preferably, the adhesive is prepared by uniform mixing and adjusting the viscosity to a range of 3000–6000 CPS / 25℃.

[0035] In summary, the beneficial effects of this invention are as follows: The invention uses a unique anti-seepage thickener modified with hydroxypropyl methylcellulose to ensure that the long gloves maintain a relatively slow flow under low shear during uniform impregnation, solving the problem of slippage and residue that easily occurs during glove impregnation. Under high shear conditions such as high-speed stirring, shear thinning does not occur, maintaining the stability of the rubber compound and significantly improving the leveling properties of the latex, thus enhancing the smoothness of the glove's appearance and improving the continuous stability of the impregnation process. Furthermore, to a certain extent, the more zinc dithiocarbamate accelerator added, the faster the latex forms a film in the air, and the higher the film-forming rate. Both factors combined ensure that the performance of this glove is significantly superior to traditional gloves. The long chemical-resistant gloves prepared by this invention, while considering both abrasion resistance and chemical protection, still maintain a rapid film-forming rate, are lighter and thinner, and offer better wearing comfort and flexibility. Detailed Implementation

[0036] The specific embodiments of the present invention will be further described below. These embodiments do not constitute a limitation on the present invention.

[0037] Example 1

[0038] Preparation of modified hydroxypropyl methylcellulose antipermeable thickener:

[0039] S1, the refined cotton fibers are initially pre-acidified with the organic acid oxalic acid, and then rapidly heated to decompose both simultaneously.

[0040] S2, the pre-acidified refined cotton fibers are soaked in 50% NaOH alkaline solution for 1 hour for alkalization, and the temperature is maintained at 40-45℃.

[0041] S3 involves pressing the alkali-treated refined cotton fibers under pressure, maintaining the pressure at 3 to 4 times the weight of the refined cotton fibers, then pulverizing and aging them for 24 hours.

[0042] S4, a mixed gas obtained by compounding ethylene oxide and chloromethane in a volume ratio of 3:2, is used as an etherifying agent. The refined cotton fibers after alkalization are added to the etherifying agent and reacted for 4 hours at 25-50°C and 0.5-1 MPa pressure to obtain crude hydroxypropyl methylcellulose.

[0043] S5. The etherified crude hydroxypropyl methylcellulose was soaked and washed with deionized water, then the pH was adjusted to neutral with oxalic acid, and then dried and dehydrated, and pulverized and purified to obtain modified hydroxypropyl methylcellulose.

[0044] Glove core preparation: The core is knitted using an 8-inch hand mold. A 13-needle knitting machine is used to cover and knit 50 parts by weight of 300D PE yarn, 15 parts by weight of 50D nylon yarn, 5 parts by weight of 40D spandex yarn, 1 part by weight of 100D HPPE, and 1 part by weight of 0.0035mm steel wire. The yarn weight per 100 meters is 7-7.25g. Ribbed knitting: two high and one low, one alternate.

[0045] Rubber compound preparation: Take 100 parts by weight of nitrile latex, and add 1 part of 5% KOH solution, 1 part of 50% sulfur solution, 1 part of 50% ZnO solution, 1 part of accelerator 50% zinc dithiocarbamate solution, 5 parts of matting agent 5% fumed silica, 1 part of water-based color paste and 2 parts of anti-seepage thickener 5% modified hydroxypropyl methylcellulose in sequence. Add the mixture to the nitrile latex by mechanical mixing, mix evenly and adjust the viscosity to 3000 CPS / 25℃.

[0046] Pretreatment of glove core: Insert the glove core into a long cylindrical hand mold of the corresponding size, place it in an oven at 50-65℃ for 30 minutes to preheat, remove the preheated hand mold, and immerse it in a coagulant containing 80 parts by weight of methanol solvent, 10 parts by weight of a mixture of 95% glacial acetic acid and 10 parts by weight of 98% calcium nitrate solution, and drip for 1-3 minutes.

[0047] Dipping the glove core in adhesive: Slowly and evenly immerse the glove core, which has been soaked in the coagulant, into the prepared adhesive. Immerse it to a fixed position and hold for 5-10 seconds to ensure that the adhesive is fully applied to the glove core. Then, pull it out at a uniform speed and let it stand for 5-10 minutes to allow the surface to dry completely.

[0048] Preparation of lightweight long-tube chemical protective gloves: The glove cores that have been left to stand are placed in an oven and vulcanized gradually until the gloves are fully dry. Then, vulcanization is carried out in a stepwise vulcanization process. The oven temperature is divided into three stages: pre-drying at 50-65℃ for 30 minutes, pre-vulcanizing at 90-100℃ for 45 minutes, and complete vulcanization at 110-130℃ for 1 hour to obtain lightweight long-tube chemical protective gloves.

[0049] Example 2

[0050] Preparation of modified hydroxypropyl methylcellulose antipermeable thickener:

[0051] S1, the refined cotton fibers are initially pre-acidified with the organic acid oxalic acid, and then rapidly heated to decompose both simultaneously.

[0052] S2, the pre-acidified refined cotton fibers are soaked in 50% NaOH alkaline solution for 1 hour for alkalization, and the temperature is maintained at 40-45℃.

[0053] S3 involves pressing the alkali-treated refined cotton fibers under pressure, maintaining the pressure at 3 to 4 times the weight of the refined cotton fibers, then pulverizing and aging them for 24 hours.

[0054] S4, a mixed gas obtained by compounding ethylene oxide and chloromethane in a volume ratio of 3:2, is used as an etherifying agent. The refined cotton fibers after alkalization are added to the etherifying agent and reacted for 4 hours at 25-50°C and 0.5-1 MPa pressure to obtain crude hydroxypropyl methylcellulose.

[0055] S5. The etherified crude hydroxypropyl methylcellulose was soaked and washed with deionized water, then the pH was adjusted to neutral with oxalic acid, and then dried and dehydrated, and pulverized and purified to obtain modified hydroxypropyl methylcellulose.

[0056] Glove core preparation: The core is knitted using an 8-inch hand mold. A 13-needle knitting machine is used to cover and knit 50 parts by weight of 300D PE yarn, 15 parts by weight of 50D nylon yarn, 5 parts by weight of 40D spandex yarn, 1 part by weight of 100D HPPE, and 1 part by weight of 0.0035mm steel wire. The yarn weight per 100 meters is 7-7.25g. Ribbed knitting: two high and one low, one alternate.

[0057] Rubber compound preparation: Take 100 parts by weight of nitrile latex, and add 2 parts of 5% KOH solution, 2 parts of 50% sulfur solution, 2 parts of 50% ZnO solution, 2 parts of accelerator 50% zinc dithiocarbamate solution, 5 parts of matting agent 5% fumed silica, 1 part of water-based color paste and 2 parts of anti-seepage thickener 5% modified hydroxypropyl methylcellulose in sequence. Add the mixture to the nitrile latex by mechanical mixing, mix evenly and adjust the viscosity to 3000 CPS / 25℃.

[0058] Pretreatment of glove core: Insert the glove core into a long cylindrical hand mold of the corresponding size, place it in an oven at 50-65℃ for 30 minutes to preheat, remove the preheated hand mold, and immerse it in a coagulant containing 80 parts by weight of methanol solvent, 10 parts by weight of a mixture of 95% glacial acetic acid and 10 parts by weight of 98% calcium nitrate solution, and drip for 1-3 minutes.

[0059] Dipping the glove core in adhesive: Slowly and evenly immerse the glove core, which has been soaked in the coagulant, into the prepared adhesive. Immerse it to a fixed position and hold for 5-10 seconds to ensure that the adhesive is fully applied to the glove core. Then, pull it out at a uniform speed and let it stand for 5-10 minutes to allow the surface to dry completely.

[0060] Preparation of lightweight long-tube chemical protective gloves: The glove cores that have been left to stand are placed in an oven and vulcanized gradually until the gloves are fully dry. Then, vulcanization is carried out in a stepwise vulcanization process. The oven temperature is divided into three stages: pre-drying at 50-65℃ for 30 minutes, pre-vulcanizing at 90-100℃ for 45 minutes, and complete vulcanization at 110-130℃ for 1 hour to obtain lightweight long-tube chemical protective gloves.

[0061] Example 3

[0062] Preparation of modified hydroxypropyl methylcellulose antipermeable thickener:

[0063] S1, the refined cotton fibers are initially pre-acidified with the organic acid oxalic acid, and then rapidly heated to decompose both simultaneously.

[0064] S2, the pre-acidified refined cotton fibers are soaked in 50% NaOH alkaline solution for 1 hour for alkalization, and the temperature is maintained at 40-45℃.

[0065] S3 involves pressing the alkali-treated refined cotton fibers under pressure, maintaining the pressure at 3 to 4 times the weight of the refined cotton fibers, then pulverizing and aging them for 24 hours.

[0066] S4, a mixed gas obtained by compounding ethylene oxide and chloromethane in a volume ratio of 3:2, is used as an etherifying agent. The refined cotton fibers after alkalization are added to the etherifying agent and reacted for 4 hours at 25-50°C and 0.5-1 MPa pressure to obtain crude hydroxypropyl methylcellulose.

[0067] S5. The etherified crude hydroxypropyl methylcellulose was soaked and washed with deionized water, then the pH was adjusted to neutral with oxalic acid, and then dried and dehydrated, and pulverized and purified to obtain modified hydroxypropyl methylcellulose.

[0068] Glove core preparation: The core is knitted using an 8-inch hand mold. A 13-needle knitting machine is used to cover and knit 50 parts by weight of 300D PE yarn, 15 parts by weight of 50D nylon yarn, 5 parts by weight of 40D spandex yarn, 1 part by weight of 100D HPPE, and 1 part by weight of 0.0035mm steel wire. The yarn weight per 100 meters is 7-7.25g. Ribbed knitting: two high and one low, one alternate.

[0069] Rubber compound preparation: Take 100 parts by weight of nitrile latex, and add 3 parts of 5% KOH solution, 3 parts of 50% sulfur solution, 3 parts of 50% ZnO solution, 3 parts of accelerator 50% zinc dithiocarbamate solution, 5 parts of matting agent 5% fumed silica, 1 part of water-based color paste and 2 parts of anti-seepage thickener 5% modified hydroxypropyl methylcellulose in sequence. Add the mixture to the nitrile latex by mechanical mixing, mix evenly and adjust the viscosity to 3000-6000 CPS / 25℃.

[0070] Pretreatment of glove core: Insert the glove core into a long cylindrical hand mold of the corresponding size, place it in an oven at 50-65℃ for 30 minutes to preheat, remove the preheated hand mold, and immerse it in a coagulant containing 80 parts by weight of methanol solvent, 10 parts by weight of a mixture of 95% glacial acetic acid and 10 parts by weight of 98% calcium nitrate solution, and drip for 1-3 minutes.

[0071] Dipping the glove core in adhesive: Slowly and evenly immerse the glove core, which has been soaked in the coagulant, into the prepared adhesive. Immerse it to a fixed position and hold for 5-10 seconds to ensure that the adhesive is fully applied to the glove core. Then, pull it out at a uniform speed and let it stand for 5-10 minutes to allow the surface to dry completely.

[0072] Preparation of lightweight long-tube chemical protective gloves: The glove cores that have been left to stand are placed in an oven and vulcanized gradually until the gloves are fully dry. Then, vulcanization is carried out in a stepwise vulcanization process. The oven temperature is divided into three stages: pre-drying at 50-65℃ for 30 minutes, pre-vulcanizing at 90-100℃ for 45 minutes, and complete vulcanization at 110-130℃ for 1 hour to obtain lightweight long-tube chemical protective gloves.

[0073] Example 4

[0074] Preparation of modified hydroxypropyl methylcellulose antipermeable thickener:

[0075] S1, the refined cotton fibers are initially pre-acidified with the organic acid oxalic acid, and then rapidly heated to decompose both simultaneously.

[0076] S2, the pre-acidified refined cotton fibers are soaked in 50% NaOH alkaline solution for 1 hour for alkalization, and the temperature is maintained at 40-45℃.

[0077] S3 involves pressing the alkali-treated refined cotton fibers under pressure, maintaining the pressure at 3 to 4 times the weight of the refined cotton fibers, then pulverizing and aging them for 24 hours.

[0078] S4, a mixed gas obtained by compounding ethylene oxide and chloromethane in a volume ratio of 3:2, is used as an etherifying agent. The refined cotton fibers after alkalization are added to the etherifying agent and reacted for 4 hours at 25-50°C and 0.5-1 MPa pressure to obtain crude hydroxypropyl methylcellulose.

[0079] S5. The etherified crude hydroxypropyl methylcellulose was soaked and washed with deionized water, then the pH was adjusted to neutral with oxalic acid, and then dried and dehydrated, and pulverized and purified to obtain modified hydroxypropyl methylcellulose.

[0080] Glove core preparation: The core is knitted using an 8-inch hand mold. A 13-needle knitting machine is used to cover and knit 50 parts by weight of 300D PE yarn, 15 parts by weight of 50D nylon yarn, 5 parts by weight of 40D spandex yarn, 1 part by weight of 100D HPPE, and 1 part by weight of 0.0035mm steel wire. The yarn weight per 100 meters is 7-7.25g. Ribbed knitting: two high and one low, one alternate.

[0081] Rubber compound preparation: Take 100 parts by weight of nitrile latex, and add 1 part of 5% KOH solution, 1 part of 50% sulfur solution, 3 parts of 50% ZnO solution, 3 parts of accelerator 50% zinc dithiocarbamate solution, 5 parts of matting agent 5% fumed silica, 1 part of water-based color paste and 3 parts of anti-seepage thickener 5% modified hydroxypropyl methylcellulose in sequence. Add the mixture to the nitrile latex by mechanical mixing, mix evenly and adjust the viscosity to 4000 CPS / 25℃.

[0082] Pretreatment of glove core: Insert the glove core into a long cylindrical hand mold of the corresponding size, place it in an oven at 50-65℃ for 30 minutes to preheat, remove the preheated hand mold, and immerse it in a coagulant containing 80 parts by weight of methanol solvent, 10 parts by weight of a mixture of 95% glacial acetic acid and 10 parts by weight of 98% calcium nitrate solution, and drip for 1-3 minutes.

[0083] Dipping the glove core in adhesive: Slowly and evenly immerse the glove core, which has been soaked in the coagulant, into the prepared adhesive. Immerse it to a fixed position and hold for 5-10 seconds to ensure that the adhesive is fully applied to the glove core. Then, pull it out at a uniform speed and let it stand for 5-10 minutes to allow the surface to dry completely.

[0084] Preparation of lightweight long-tube chemical protective gloves: The glove cores that have been left to stand are placed in an oven and vulcanized gradually until the gloves are fully dry. Then, vulcanization is carried out in a stepwise vulcanization process. The oven temperature is divided into three stages: pre-drying at 50-65℃ for 30 minutes, pre-vulcanizing at 90-100℃ for 45 minutes, and complete vulcanization at 110-130℃ for 1 hour to obtain lightweight long-tube chemical protective gloves.

[0085] Example 5

[0086] Preparation of modified hydroxypropyl methylcellulose antipermeable thickener:

[0087] S1, the refined cotton fibers are initially pre-acidified with the organic acid oxalic acid, and then rapidly heated to decompose both simultaneously.

[0088] S2, the pre-acidified refined cotton fibers are soaked in 50% NaOH alkaline solution for 1 hour for alkalization, and the temperature is maintained at 40-45℃.

[0089] S3 involves pressing the alkali-treated refined cotton fibers under pressure, maintaining the pressure at 3 to 4 times the weight of the refined cotton fibers, then pulverizing and aging them for 24 hours.

[0090] S4, a mixed gas obtained by compounding ethylene oxide and chloromethane in a volume ratio of 3:2, is used as an etherifying agent. The refined cotton fibers after alkalization are added to the etherifying agent and reacted for 4 hours at 25-50°C and 0.5-1 MPa pressure to obtain crude hydroxypropyl methylcellulose.

[0091] S5. The etherified crude hydroxypropyl methylcellulose was soaked and washed with deionized water, then the pH was adjusted to neutral with oxalic acid, and then dried and dehydrated, and pulverized and purified to obtain modified hydroxypropyl methylcellulose.

[0092] Glove core preparation: A 12-inch hand mold is used for knitting. An 18-needle knitting machine is used to cover and knit 70 parts by weight of 400D PE yarn, 30 parts by weight of 140D nylon yarn, 15 parts by weight of 140D spandex yarn, 5 parts by weight of 400D HPPE, and 5 parts by weight of 0.05mm steel wire. The yarn weight per 100 meters is 7-7.25g. Ribbed knitting: two high and one low, one alternate.

[0093] Rubber compound preparation: Take 100 parts by weight of nitrile latex, and add 3 parts of 5% KOH solution, 3 parts of 50% sulfur solution, 1 part of 50% ZnO solution, 1 part of accelerator 50% zinc dithiocarbamate solution, 5 parts of matting agent 5% fumed silica, 1 part of water-based color paste and 3 parts of anti-seepage thickener 5% modified hydroxypropyl methylcellulose in sequence. Add the mixture to the nitrile latex by mechanical mixing, mix evenly and adjust the viscosity to 4000 CPS / 25℃.

[0094] Pretreatment of glove core: Insert the glove core into a long cylindrical hand mold of the corresponding size, place it in an oven at 50-65℃ for 30 minutes to preheat, remove the preheated hand mold, and immerse it in a coagulant containing 80 parts by weight of methanol solvent, 10 parts by weight of a mixture of 95% glacial acetic acid and 10 parts by weight of 98% calcium nitrate solution, and drip for 1-3 minutes.

[0095] Dipping the glove core in adhesive: Slowly and evenly immerse the glove core, which has been soaked in the coagulant, into the prepared adhesive. Immerse it to a fixed position and hold for 5-10 seconds to ensure that the adhesive is fully applied to the glove core. Then, pull it out at a uniform speed and let it stand for 5-10 minutes to allow the surface to dry completely.

[0096] Preparation of lightweight long-tube chemical protective gloves: The glove cores that have been left to stand are placed in an oven and vulcanized gradually until the gloves are fully dry. Then, vulcanization is carried out in a stepwise vulcanization process. The oven temperature is divided into three stages: pre-drying at 50-65℃ for 30 minutes, pre-vulcanizing at 90-100℃ for 45 minutes, and complete vulcanization at 110-130℃ for 1 hour to obtain lightweight long-tube chemical protective gloves.

[0097] Example 6

[0098] Preparation of modified hydroxypropyl methylcellulose antipermeable thickener:

[0099] S1, the refined cotton fibers are initially pre-acidified with the organic acid oxalic acid, and then rapidly heated to decompose both simultaneously.

[0100] S2, the pre-acidified refined cotton fibers are soaked in 50% NaOH alkaline solution for 1 hour for alkalization, and the temperature is maintained at 40-45℃.

[0101] S3 involves pressing the alkali-treated refined cotton fibers under pressure, maintaining the pressure at 3 to 4 times the weight of the refined cotton fibers, then pulverizing and aging them for 24 hours.

[0102] S4, a mixed gas obtained by compounding ethylene oxide and chloromethane in a volume ratio of 3:2, is used as an etherifying agent. The refined cotton fibers after alkalization are added to the etherifying agent and reacted for 4 hours at 25-50°C and 0.5-1 MPa pressure to obtain crude hydroxypropyl methylcellulose.

[0103] S5. The etherified crude hydroxypropyl methylcellulose was soaked and washed with deionized water, then the pH was adjusted to neutral with oxalic acid, and then dried and dehydrated, and pulverized and purified to obtain modified hydroxypropyl methylcellulose.

[0104] Glove core preparation: A 12-inch hand mold is used for knitting. An 18-needle knitting machine is used to cover and knit 70 parts by weight of 400D PE yarn, 30 parts by weight of 140D nylon yarn, 15 parts by weight of 140D spandex yarn, 5 parts by weight of 400D HPPE, and 5 parts by weight of 0.05mm steel wire. The yarn weight per 100 meters is 7-7.25g. Ribbed knitting: two high and one low, one alternate.

[0105] Rubber compound preparation: Take 100 parts by weight of nitrile latex, and add 1 part of 5% KOH solution, 1 part of 50% sulfur solution, 3 parts of 50% ZnO solution, 1 part of accelerator 50% zinc dithiocarbamate solution, 5 parts of matting agent 5% fumed silica, 1 part of water-based color paste and 3 parts of anti-seepage thickener 5% modified hydroxypropyl methylcellulose in sequence. Add the mixture to the nitrile latex by mechanical mixing, mix evenly and adjust the viscosity to 4000 CPS / 25℃.

[0106] Pretreatment of glove core: Insert the glove core into a long cylindrical hand mold of the corresponding size, place it in an oven at 50-65℃ for 30 minutes to preheat, remove the preheated hand mold, and immerse it in a coagulant containing 80 parts by weight of methanol solvent, 10 parts by weight of a mixture of 95% glacial acetic acid and 10 parts by weight of 98% calcium nitrate solution, and drip for 1-3 minutes.

[0107] Dipping the glove core in adhesive: Slowly and evenly immerse the glove core, which has been soaked in the coagulant, into the prepared adhesive. Immerse it to a fixed position and hold for 5-10 seconds to ensure that the adhesive is fully applied to the glove core. Then, pull it out at a uniform speed and let it stand for 5-10 minutes to allow the surface to dry completely.

[0108] Preparation of lightweight long-tube chemical protective gloves: The glove cores that have been left to stand are placed in an oven and vulcanized gradually until the gloves are fully dry. Then, vulcanization is carried out in a stepwise vulcanization process. The oven temperature is divided into three stages: pre-drying at 50-65℃ for 30 minutes, pre-vulcanizing at 90-100℃ for 45 minutes, and complete vulcanization at 110-130℃ for 1 hour to obtain lightweight long-tube chemical protective gloves.

[0109] Example 7

[0110] Preparation of modified hydroxypropyl methylcellulose antipermeable thickener:

[0111] S1, the refined cotton fibers are initially pre-acidified with the organic acid oxalic acid, and then rapidly heated to decompose both simultaneously.

[0112] S2, the pre-acidified refined cotton fibers are soaked in 50% NaOH alkaline solution for 1 hour for alkalization, and the temperature is maintained at 40-45℃.

[0113] S3 involves pressing the alkali-treated refined cotton fibers under pressure, maintaining the pressure at 3 to 4 times the weight of the refined cotton fibers, then pulverizing and aging them for 24 hours.

[0114] S4, a mixed gas obtained by compounding ethylene oxide and chloromethane in a volume ratio of 3:2, is used as an etherifying agent. The refined cotton fibers after alkalization are added to the etherifying agent and reacted for 4 hours at 25-50°C and 0.5-1 MPa pressure to obtain crude hydroxypropyl methylcellulose.

[0115] S5. The etherified crude hydroxypropyl methylcellulose was soaked and washed with deionized water, then the pH was adjusted to neutral with oxalic acid, and then dried and dehydrated, and pulverized and purified to obtain modified hydroxypropyl methylcellulose.

[0116] Glove core preparation: A 12-inch hand mold is used for knitting. An 18-needle knitting machine is used to cover and knit 70 parts by weight of 400D PE yarn, 30 parts by weight of 140D nylon yarn, 15 parts by weight of 140D spandex yarn, 5 parts by weight of 400D HPPE, and 5 parts by weight of 0.05mm steel wire. The yarn weight per 100 meters is 7-7.25g. Ribbed knitting: two high and one low, one alternate.

[0117] Rubber compound preparation: Take 100 parts by weight of nitrile latex, and add 3 parts of 5% KOH solution, 1 part of 50% sulfur solution, 1 part of 50% ZnO solution, 3 parts of accelerator 50% zinc dithiocarbamate solution, 5 parts of matting agent 5% fumed silica, 1 part of water-based color paste and 5 parts of anti-seepage thickener 5% modified hydroxypropyl methylcellulose in sequence. Add the mixture to the nitrile latex by mechanical mixing, mix evenly and adjust the viscosity to 6000 CPS / 25℃.

[0118] Pretreatment of glove core: Insert the glove core into a long cylindrical hand mold of the corresponding size, place it in an oven at 50-65℃ for 30 minutes to preheat, remove the preheated hand mold, and immerse it in a coagulant containing 80 parts by weight of methanol solvent, 10 parts by weight of a mixture of 95% glacial acetic acid and 10 parts by weight of 98% calcium nitrate solution, and drip for 1-3 minutes.

[0119] Dipping the glove core in adhesive: Slowly and evenly immerse the glove core, which has been soaked in the coagulant, into the prepared adhesive. Immerse it to a fixed position and hold for 5-10 seconds to ensure that the adhesive is fully applied to the glove core. Then, pull it out at a uniform speed and let it stand for 5-10 minutes to allow the surface to dry completely.

[0120] Preparation of lightweight long-tube chemical protective gloves: The glove cores that have been left to stand are placed in an oven and vulcanized gradually until the gloves are fully dry. Then, vulcanization is carried out in a stepwise vulcanization process. The oven temperature is divided into three stages: pre-drying at 50-65℃ for 30 minutes, pre-vulcanizing at 90-100℃ for 45 minutes, and complete vulcanization at 110-130℃ for 1 hour to obtain lightweight long-tube chemical protective gloves.

[0121] Example 8

[0122] Preparation of modified hydroxypropyl methylcellulose antipermeable thickener:

[0123] S1, the refined cotton fibers are initially pre-acidified with the organic acid oxalic acid, and then rapidly heated to decompose both simultaneously.

[0124] S2, the pre-acidified refined cotton fibers are soaked in 50% NaOH alkaline solution for 1 hour for alkalization, and the temperature is maintained at 40-45℃.

[0125] S3 involves pressing the alkali-treated refined cotton fibers under pressure, maintaining the pressure at 3 to 4 times the weight of the refined cotton fibers, then pulverizing and aging them for 24 hours.

[0126] S4, a mixed gas obtained by compounding ethylene oxide and chloromethane in a volume ratio of 3:2, is used as an etherifying agent. The refined cotton fibers after alkalization are added to the etherifying agent and reacted for 4 hours at 25-50°C and 0.5-1 MPa pressure to obtain crude hydroxypropyl methylcellulose.

[0127] S5. The etherified crude hydroxypropyl methylcellulose was soaked and washed with deionized water, then the pH was adjusted to neutral with oxalic acid, and then dried and dehydrated, and pulverized and purified to obtain modified hydroxypropyl methylcellulose.

[0128] Glove core preparation: A 12-inch hand mold is used for knitting. An 18-needle knitting machine is used to cover and knit 70 parts by weight of 400D PE yarn, 30 parts by weight of 140D nylon yarn, 15 parts by weight of 140D spandex yarn, 5 parts by weight of 400D HPPE, and 5 parts by weight of 0.05mm steel wire. The yarn weight per 100 meters is 7-7.25g. Ribbed knitting: two high and one low, one alternate.

[0129] Rubber compound preparation: Take 100 parts by weight of nitrile latex, and add 3 parts of 5% KOH solution, 1 part of 50% sulfur solution, 3 parts of 50% ZnO solution, 1 part of accelerator 50% zinc dithiocarbamate solution, 5 parts of matting agent 5% fumed silica, 1 part of water-based color paste and 5 parts of anti-seepage thickener 5% modified hydroxypropyl methylcellulose in sequence. Add the mixture to the nitrile latex by mechanical mixing, mix evenly and adjust the viscosity to 4000-6000 CPS / 25℃.

[0130] Pretreatment of glove core: Insert the glove core into a long cylindrical hand mold of the corresponding size, place it in an oven at 50-65℃ for 30 minutes to preheat, remove the preheated hand mold, and immerse it in a coagulant containing 80 parts by weight of methanol solvent, 10 parts by weight of a mixture of 95% glacial acetic acid and 10 parts by weight of 98% calcium nitrate solution, and drip for 1-3 minutes.

[0131] Dipping the glove core in adhesive: Slowly and evenly immerse the glove core, which has been soaked in the coagulant, into the prepared adhesive. Immerse it to a fixed position and hold for 5-10 seconds to ensure that the adhesive is fully applied to the glove core. Then, pull it out at a uniform speed and let it stand for 5-10 minutes to allow the surface to dry completely.

[0132] Preparation of lightweight long-tube chemical protective gloves: The glove cores that have been left to stand are placed in an oven and vulcanized gradually until the gloves are fully dry. Then, vulcanization is carried out in a stepwise vulcanization process. The oven temperature is divided into three stages: pre-drying at 50-65℃ for 30 minutes, pre-vulcanizing at 90-100℃ for 45 minutes, and complete vulcanization at 110-130℃ for 1 hour to obtain lightweight long-tube chemical protective gloves.

[0133] Example 9

[0134] Preparation of modified hydroxypropyl methylcellulose antipermeable thickener:

[0135] S1, the refined cotton fibers are initially pre-acidified with the organic acid oxalic acid, and then rapidly heated to decompose both simultaneously.

[0136] S2, the pre-acidified refined cotton fibers are soaked in 50% NaOH alkaline solution for 1 hour for alkalization, and the temperature is maintained at 40-45℃.

[0137] S3 involves pressing the alkali-treated refined cotton fibers under pressure, maintaining the pressure at 3 to 4 times the weight of the refined cotton fibers, then pulverizing and aging them for 24 hours.

[0138] S4, a mixed gas obtained by compounding ethylene oxide and chloromethane in a volume ratio of 3:2, is used as an etherifying agent. The refined cotton fibers after alkalization are added to the etherifying agent and reacted for 4 hours at 25-50°C and 0.5-1 MPa pressure to obtain crude hydroxypropyl methylcellulose.

[0139] S5. The etherified crude hydroxypropyl methylcellulose was soaked and washed with deionized water, then the pH was adjusted to neutral with oxalic acid, and then dried and dehydrated, and pulverized and purified to obtain modified hydroxypropyl methylcellulose.

[0140] Glove core preparation: A 12-inch hand mold is used for knitting. An 18-needle knitting machine is used to cover and knit 70 parts by weight of 400D PE yarn, 30 parts by weight of 140D nylon yarn, 15 parts by weight of 140D spandex yarn, 5 parts by weight of 400D HPPE, and 5 parts by weight of 0.05mm steel wire. The yarn weight per 100 meters is 7-7.25g. Ribbed knitting: two high and one low, one alternate.

[0141] Rubber compound preparation: Take 100 parts by weight of nitrile latex, and add 1 part of 5% KOH solution, 3 parts of 50% sulfur solution, 1 part of 50% ZnO solution, 3 parts of accelerator 50% zinc dithiocarbamate solution, 5 parts of matting agent 5% fumed silica, 1 part of water-based color paste and 5 parts of anti-seepage thickener 5% modified hydroxypropyl methylcellulose in sequence. Add the mixture to the nitrile latex by mechanical mixing, mix evenly and adjust the viscosity to 6000 CPS / 25℃.

[0142] Pretreatment of glove core: Insert the glove core into a long cylindrical hand mold of the corresponding size, place it in an oven at 50-65℃ for 30 minutes to preheat, remove the preheated hand mold, and immerse it in a coagulant containing 80 parts by weight of methanol solvent, 10 parts by weight of a mixture of 95% glacial acetic acid and 10 parts by weight of 98% calcium nitrate solution, and drip for 1-3 minutes.

[0143] Dipping the glove core in adhesive: Slowly and evenly immerse the glove core, which has been soaked in the coagulant, into the prepared adhesive. Immerse it to a fixed position and hold for 5-10 seconds to ensure that the adhesive is fully applied to the glove core. Then, pull it out at a uniform speed and let it stand for 5-10 minutes to allow the surface to dry completely.

[0144] Preparation of lightweight long-tube chemical protective gloves: The glove cores that have been left to stand are placed in an oven and vulcanized gradually until the gloves are fully dry. Then, vulcanization is carried out in a stepwise vulcanization process. The oven temperature is divided into three stages: pre-drying at 50-65℃ for 30 minutes, pre-vulcanizing at 90-100℃ for 45 minutes, and complete vulcanization at 110-130℃ for 1 hour to obtain lightweight long-tube chemical protective gloves.

[0145] The performance of the thin, long-tube chemical protective gloves prepared in Examples 1 to 9 above was tested, and the specific data are shown in Table 1.

[0146] Table 1 Performance test results of Examples 1 to 9

[0147] Film formation rate / min Chemical protection level Abrasion resistance rating Example 1 6 A 3 Example 2 5 B 3 Example 3 3 A 4 Example 4 4 A 3 Example 5 5 A 4 Example 6 7 B 3 Example 7 4 A 4 Example 8 4 A 3 Example 9 3 A 3

[0148] As can be seen from the table above, in the above embodiments, the use of a unique modified hydroxypropyl methylcellulose thickener in the formulation ensures that the long gloves maintain a relatively slow flow under low shear during uniform impregnation, solving the problem of slippage and residue that easily occurs during glove impregnation. Under high shear conditions such as high-speed stirring, shear thinning does not occur, maintaining the stability of the rubber compound and greatly improving the leveling properties of the latex, thus enhancing the smoothness of the glove's appearance and improving the continuous stability of the impregnation process. Furthermore, to a certain extent, the more zinc dithiocarbamate accelerator added, the faster the latex forms a film in the air, and the higher the film-forming rate. Both factors contribute to ensuring that the performance of this glove is significantly superior to that of traditional gloves. This invention's long-tube chemical protective gloves, while considering both abrasion resistance and chemical protection, still maintain a rapid film-forming rate, making them a novel type of functional protective glove. Examples 3 and 7, in particular, exhibit more outstanding overall performance, meeting the chemical protection requirements for most situations while also providing comfort and flexibility for extended wear.

[0149] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art can make various modifications or equivalent substitutions to the present invention within the scope of its essence and protection. Such modifications or equivalent substitutions should also be considered to fall within the protection scope of the present invention.

Claims

1. A light, thin, long gauntlet chemical protective glove characterized in that, The glove core including an inner layer is dipped with a rubber compound outside the glove core, the glove core includes the following raw materials by weight: PE filaments: 50-70 parts; Nylon filaments: 15-30 parts; Spandex filaments: 5-15 parts; HPPE: 1-5 parts; Steel filaments: 1-5 parts; The rubber compound includes the following raw materials by weight: Nitrile latex: 100 parts; 5% KOH solution: 1-3 parts; 50% sulfur suspension: 1-3 parts; Promoter 50% zinc dithiocarbamate solution: 1-3 parts; 50% zinc oxide solution: 1-3 parts; Matt powder 5% fumed silica: 5 parts; Impermeable thickening agent 5% modified hydroxypropyl methyl cellulose: 2-5 parts; Water-based color paste: 1 part; The preparation steps of the modified hydroxypropyl methyl cellulose impermeable thickening agent include the following: S1, the refined cotton fibers are pre-acidified with oxalic acid, and the two are decomposed synchronously by rapid heating; S2, the pre-acidified refined cotton fibers are soaked with 50% NaOH lye for 1h for alkalization, and the temperature is kept at 40-45℃; S3, the alkalized refined cotton fibers are pressure treated, the pressure is kept at 3-4 times the weight of the refined cotton fibers, then they are crushed and powdered, and the powder is aged for 24h; S4, the alkalized refined cotton fibers are reacted with etherifying agent at 25-50℃ and 0.5-1mpa pressure for 4h to prepare crude hydroxypropyl methyl cellulose; S5, the etherified crude hydroxypropyl methyl cellulose is soaked and cleaned with deionized water, then it is adjusted to neutral with oxalic acid, and finally it is dried, dehydrated, powdered and purified into modified hydroxypropyl methyl cellulose.

2. The light and thin long tube chemical protection glove according to claim 1, characterized in that: The PE filaments use one or a mixture of 300D PE filaments, 400D PE filaments and 200D PE filaments; The nylon filaments use one or a mixture of 50D nylon, 70D nylon and 140D nylon; The spandex filaments use one or a mixture of 140D spandex, 70D spandex and 40D spandex; The HPPE uses one or a mixture of 100D filaments, 200D filaments, 400D filaments and 300D filaments; The steel filaments use one or a mixture of 0.05mm, 0.035mm and 0.045mm.

3. A light, thin, long gauntlet chemical protective glove according to claim 1, characterized in that: The etherifying agent is a mixed gas obtained by compounding ethylene oxide and chloromethane at a volume ratio of 3:

2.

4. A method for manufacturing a light, thin, long, and chemical protective glove, characterized by: The steps include: Glove core preparation: knitting with a special size hand mold, and covering knitting with specific proportions of PE filaments, nylon filaments, spandex filaments, HPPE and steel filaments by using a knitting machine, and the cuff knitting: two high and one low, 1 every 1; Rubber compound preparation: take nitrile latex, add 5% KOH solution, 50% sulfur solution, 50% ZnO solution, promoter 50% zinc dithiocarbamate solution, matt powder 5% fumed silica, water-based color paste and impermeable thickening agent 5% modified hydroxypropyl methyl cellulose in proportion, and add them to the nitrile latex by mechanical mixing, mix well and adjust the viscosity. Glove core pretreatment: the glove core is sleeved into the corresponding size of the long tube hand mold, placed in the oven at 50~65℃ for preheating for 30min, the preheated hand mold is taken out, immersed in the coagulant, and dropped for 1~3min; Glove core dipping: the glove core dipped in the coagulant is slowly and uniformly immersed in the prepared glue, immersed to the fixed position, kept for 5~10S, so that the glue is fully coated on the glove core, then uniformly taken out, and kept for 5~10min, so that the surface is fully and uniformly dried; Preparation of light and thin long tube chemical protection gloves: the above-mentioned glove core after standing is sequentially placed in the oven, gradually vulcanized completely, until the gloves are fully dried, then sequentially vulcanized according to the step vulcanization process, and the light and thin long tube chemical protection gloves are prepared.

5. The method of making a light, thin, long gauntlet chemical protective glove of claim 4, wherein: The hand mold size is 8~12 inches, the knitting machine model adopts one of 13 needles, 15 needles and 18 needles, and the yarn gram weight per 100 meters is 7~7.25g.

6. The method of making a light, thin, long gauntlet chemical protective glove of claim 4, wherein: The coagulant comprises the following raw materials in parts by weight: Methanol solvent: 80 parts; 95% glacial acetic acid mixture: 10 parts; 98% calcium nitrate solution: 10 parts.

7. The method of making a light, thin, long gauntlet chemical protective glove of claim 4, wherein: The oven temperature in the step vulcanization process is divided into three stages, pre-drying at 50~65℃ for 30min, pre-vulcanization at 90~100℃ for 45min, and complete vulcanization at 110~130℃ for 1h.

8. The method of making a light, thin, long gauntlet chemical protective glove of claim 4, wherein: The glue is mixed uniformly and the viscosity range is adjusted to 3000~6000CPS / 25℃.

Images