CN111363211A

CN111363211A - Natural latex composite slurry and preparation method thereof, and protective gloves and preparation method thereof

Info

Publication number: CN111363211A
Application number: CN202010055688.9A
Authority: CN
Inventors: 周星余; 王垂文
Original assignee: SHANDONG XINGYU GLOVES CO Ltd
Current assignee: SHANDONG XINGYU GLOVES CO Ltd
Priority date: 2018-04-28
Filing date: 2018-04-28
Publication date: 2020-07-03
Anticipated expiration: 2038-04-28
Also published as: CN111363211B; CN108299689A; WO2019205206A1; CN108299689B

Abstract

The invention relates to natural latex composite slurry, which is prepared from pre-vulcanized natural latex and a cold water diluted heat-sensitive agent, wherein the heat-sensitive agent is selected from one or a combination of polyethylene methyl ether, polyether polyoxymethylene glycol and polypropylene glycol. The invention also relates to a natural latex heat-sensitive embossing protective glove prepared by adopting the natural latex composite slurry. The natural latex composite sizing agent disclosed by the invention can prevent rubber permeation during glove gum dipping, avoids harm to human bodies, is energy-saving and environment-friendly, can prevent liquid from entering the gloves, enables the prepared gloves to be soft, light and flexible, has good air permeability, is not easy to fatigue after being worn for a long time, is particularly suitable for being applied to mechanical operation, enables the prepared gloves to have good comprehensive performances such as wear resistance, cut resistance, tear resistance, puncture resistance, ageing resistance and the like, and avoids influence on later-stage ageing performance of glove products and frosting.

Description

Natural latex composite slurry and preparation method thereof, and protective gloves and preparation method thereof

The application is a divisional application of an application with the application number of 201810400684.2, the application date of the original application is 2018, 4 and 28, and the invention of the original application is named as natural latex composite slurry and a preparation method thereof, and protective gloves and a preparation method thereof.

Technical Field

The invention belongs to the technical field of labor protection products, relates to natural latex composite slurry and a preparation method thereof, and also relates to a natural latex heat-sensitive embossing protective glove prepared from the natural latex composite slurry and a preparation method thereof.

Background

The existing latex protective gloves mainly achieve the anti-skid function through chemical wrinkling or physical salt spraying, most of the protective gloves take methanol and calcium salt as coagulants, organic solvents as wrinkling agents and mirabilite or sodium chloride salt as salt spraying particles, and through the processing technologies, the gloves can penetrate glue in the dipping process, the prepared protective gloves not only cause pollution to the environment and damage comprehensive performances of tear resistance, wear resistance, cut resistance, puncture resistance and the like after latex film forming, but also can cause serious damage to users due to the fact that part of chemical reagents are left on the gloves. In addition to this method, the invention patents with patent numbers 201310536861.7 and 201510366002.7 respectively use zinc ammonium complex as heat sensitive agent, and zinc oxide in zinc ammonium complex is active agent in natural latex vulcanization, which plays a role of activating accelerator, so that the rubber vulcanization speed is accelerated, and the later vulcanization speed of the product is accelerated, which leads to accelerated product aging speed, thereby affecting the aging performance; meanwhile, after the rubber is aged, molecular chains are broken, so that the binding capacity of rubber hydrocarbon is weakened, sulfur, an accelerator, zinc oxide and the like in a vulcanization system migrate to the surface of the rubber, and blooming is caused.

For review, it is important to research a natural latex composite slurry which can avoid gum penetration in a dipping process, has no harm to human bodies, is environment-friendly, has good comprehensive performances such as tear resistance, wear resistance, cut resistance and puncture resistance, and avoids influencing the aging performance of products in the later period and causing blooming, a preparation method thereof, and a natural latex heat-sensitive embossing protective glove prepared from the natural latex composite slurry and a preparation method thereof.

Disclosure of Invention

Technical problem to be solved

Aiming at the defects of the prior art, the invention provides natural latex composite slurry and a preparation method thereof, and also provides a natural latex heat-sensitive embossing protective glove prepared from the natural latex composite slurry and a preparation method thereof. The natural latex composite sizing agent and the natural latex heat-sensitive embossing protective gloves can avoid glue permeation in a dipping process, are harmless to human bodies, are environment-friendly, have good comprehensive performances such as tear resistance, wear resistance, cut resistance and puncture resistance, and simultaneously avoid influencing the aging performance of the products in the later period and causing blooming; the preparation method of the natural latex composite slurry and the natural latex heat-sensitive embossing protective gloves has the advantages of simple process, high production efficiency and low production cost, and can be used for industrial production.

(II) technical scheme

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention aims to provide natural latex composite slurry which is prepared from pre-vulcanized natural latex and a cold-water-diluted heat-sensitive agent, wherein the heat-sensitive agent is selected from one or a combination of polyethylene methyl ether, polyether formaldehyde glycol and polypropylene glycol.

According to the invention, the mass concentration of the thermosensitive agent diluted by cold water is controlled to be 15-50%.

According to the invention, the amount of the heat-sensitive agent is 1-20% of the weight of the pre-vulcanized natural rubber latex, and the amount of the heat-sensitive agent is selected according to the type of the heat-sensitive agent and the dipping thickness of the product.

According to the invention, the prevulcanized natural rubber latex is prepared by prevulcanizing the natural rubber latex by adopting a vulcanizing system, wherein the vulcanizing system is one selected from a sulfur vulcanizing system, a thiuram vulcanizing system, a resin vulcanizing system, a peroxide vulcanizing system and an oxide vulcanizing system.

The invention also aims to provide a preparation method of the natural latex composite slurry, which comprises the following steps:

(1) diluting with cold water to prepare a thermosensitive agent with required mass concentration, and pre-vulcanizing natural latex by adopting a vulcanization system to prepare pre-vulcanized natural latex;

(2) and (2) carrying out constant temperature treatment on the pre-vulcanized natural latex in the step (1) at room temperature, slowly adding the heat-sensitive agent in the step (1) after the temperature is constant, and uniformly mixing to obtain the natural latex composite slurry.

According to the invention, the temperature of the constant temperature treatment in the step (2) is controlled to be 20-30 ℃, and the temperature of the constant temperature treatment is selected according to the type of the heat-sensitive agent.

The invention also aims to provide the natural latex heat-sensitive embossing protective gloves which comprise glove blanks positioned on an inner layer and natural latex film layers positioned on an outer layer, wherein the natural latex film layers are prepared from the natural latex composite slurry.

According to the invention, the yarn material for weaving the glove blank is one or more of terylene, chinlon, aramid fiber, acrylon, ultra-high molecular weight polyethylene fiber, cotton yarn, polyester cotton, spandex, glass fiber, steel wire and basalt fiber.

The fourth purpose of the invention is to provide a preparation method of the natural latex thermosensitive embossed protective glove, which comprises the following steps:

(1) sleeving a glove blank on a hand mold, and dipping the glove blank by using the natural latex composite slurry;

(2) and (2) pressing patterns on the palm surface of the glove obtained in the step (1), pre-drying at a low temperature, demolding, washing, vulcanizing at a high temperature and drying to obtain the natural latex heat-sensitive embossing protective glove.

According to the invention, before the glove blanks are sleeved on the hand molds in the step (1), the hand molds are preheated, the temperature of the heated hand molds is controlled to be 50-130 ℃, and the temperature of the heated hand molds is selected according to the type and the amount of the heat-sensitive agent and the thickness of the impregnated products.

According to the invention, the low-temperature pre-drying temperature in the step (2) is 50-100 ℃, the low-temperature pre-drying time is 15-30 min, the water washing temperature in the step (2) is 20-30 ℃, the water washing time is 10-40 min, the high-temperature vulcanization drying temperature in the step (2) is 60-125 ℃, and the high-temperature vulcanization drying time is 30-80 min.

In the invention, the washing in the step (2) is divided into a plurality of washing steps, so that substances capable of being washed by water are in a state of decreasing concentration, and the washing of the natural latex thermosensitive embossing protective gloves is more facilitated.

(III) advantageous effects

Compared with the prior art, the invention has at least the following beneficial effects:

(1) the invention only adopts two materials of pre-vulcanized natural latex and a thermosensitive agent diluted by cold water to prepare the natural latex composite slurry and the natural latex thermosensitive embossing protective gloves, thereby saving the materials and reducing the production cost.

Because the adopted heat-sensitive agent is selected from one or a combination of a plurality of polyethylene methyl ether, polyether polyoxymethylene glycol and polypropylene glycol, the glove can not only prevent rubber permeation during gum dipping and avoid damage to human bodies, is energy-saving and environment-friendly, but also prevent liquid from entering the glove, so that the prepared glove is soft in texture, light and flexible, good in air permeability and not easy to fatigue after being worn for a long time, is particularly suitable for being applied to mechanical operation, and can also have good comprehensive performances of wear resistance, cut resistance, tear resistance, puncture resistance and the like, meanwhile, the natural latex heat-sensitive embossing protective glove of the invention is subjected to aging performance test, is aged at 60 ℃, the aging time is kept for more than 400h, compared with the natural heat-sensitive embossing glove prepared by adopting a zinc ammonium complex as the heat-sensitive agent, the comprehensive performances of wear resistance, cut resistance, tear resistance, puncture resistance, aging resistance and the like are improved, the influence on the later aging performance of the glove product and the frosting caused by the influence are avoided.

(2) The natural latex composite slurry and the preparation method of the natural latex heat-sensitive embossing protective gloves provided by the invention have the advantages of simple process, high production efficiency and low production cost, can be used for industrial production, and have high industrial application value.

Detailed Description

The specific embodiment of the invention provides a preparation method of natural latex composite slurry, which comprises the following steps:

(1) the heat-sensitive agent with the required mass concentration (hereinafter referred to as the heat-sensitive agent diluted by cold water) is prepared by adopting cold water dilution, and the natural latex is subjected to pre-vulcanization treatment by adopting a vulcanization system to prepare the pre-vulcanized natural latex.

In the present invention, the heat-sensitive agent before being diluted with cold water (hereinafter, referred to as heat-sensitive agent) is selected from one or more of polyvinyl methyl ether, polyether polyoxymethylene glycol and polypropylene glycol, and the heat-sensitive agent functions as a stabilizer when the temperature of the latex is low, and reaches the cloud point of the heat-sensitive agent when the temperature is high, and the heat-sensitive agent is rapidly coagulated, so that the latex is coagulated on the surface of the glove blank rapidly. The mass concentration of the thermosensitive agent diluted by cold water is controlled to be 15-50%.

The prevulcanized natural rubber latex is prepared by prevulcanizing natural rubber latex by adopting a vulcanizing system, wherein the vulcanizing system is one of a sulfur vulcanizing system, a thiuram vulcanizing system, a resin vulcanizing system, a peroxide vulcanizing system and an oxide vulcanizing system.

(2) And (2) carrying out constant temperature treatment on the natural latex pre-vulcanized in the step (1) at room temperature, slowly adding the thermosensitive agent diluted by cold water in the step (1) after the temperature is constant, wherein the dosage of the thermosensitive agent is determined according to the specific type of the thermosensitive agent and the dipping thickness of a final product, keeping the temperature constant, and uniformly mixing to obtain the natural latex composite slurry.

In the invention, the temperature for carrying out constant temperature treatment on the prevulcanized natural latex is controlled within the range of 20-30 ℃, and the specific constant temperature treatment temperature is determined according to the type of the heat-sensitive agent. Preferably, when the thermosensitive agent is polyvinyl methyl ether, the constant temperature treatment temperature is 20-25 ℃. When the thermosensitive agent is polypropylene glycol, the constant temperature treatment temperature is 25-30 ℃. When the thermosensitive agent is polyether-formaldehyde acetal diol, the constant temperature treatment temperature is 24-28 ℃. When the thermosensitive agent is selected from at least two of polyvinyl methyl ether, polyether polyformaldehyde acetal and polypropylene glycol, the temperature selection requirement of constant temperature treatment is low.

The combination of the natural latex composite slurry and various glove blanks (for example, glove blanks woven by one or a combination of more than one of yarns of terylene, chinlon, aramid fiber, acrylic fiber, ultra-high molecular weight polyethylene fiber (fiber woven by polyethylene with the molecular weight of more than 450 ten thousand), cotton yarn, polyester cotton, spandex, glass fiber, steel wire, basalt fiber and the like) is realized by adjusting the temperature and the dosage of the heat-sensitive agent during solidification, and the combination fastness is strong.

The specific embodiment of the invention also provides a preparation method of the natural latex thermosensitive embossed protective gloves, which comprises the following steps:

(1) sleeving the glove blank on a hand mold, and dipping the glove blank by using the natural latex composite slurry, wherein the dipping time of the natural latex composite slurry is controlled to be 2-8 s.

In the invention, the glove blank can be various cotton gloves, and also can be various chemical fiber gloves, cotton chemical fiber gloves and the like. Before sleeving the glove blank on the hand mold, the hand mold needs to be preheated, and the temperature for heating the hand mold is controlled to be 50-130 ℃.

The temperature at which the hand mold is heated is selected according to the type of heat sensitive agent, the amount of heat sensitive agent used, and the thickness of the article to be impregnated. Preferably, when the heat-sensitive agent comprises polyvinyl methyl ether in an amount of 1% by weight of the pre-vulcanized natural rubber latex and the article is dipped to a thickness of 1mm, the temperature for heating the hand mold is 90 + -2 deg.C. When the heat-sensitive agent comprises polyvinyl methyl ether, the dosage of the polyvinyl methyl ether is 1 percent of the weight of the pre-vulcanized natural latex, and the dipped thickness of the product is 2mm, the temperature of the heating hand mould is 110 +/-2 ℃. When the heat-sensitive agent comprises polyvinyl methyl ether, the dosage of the polyvinyl methyl ether is 2 percent of the weight of the pre-vulcanized natural latex, and the dipped thickness of the product is 1mm, the temperature of the heating hand mould is 70 +/-2 ℃. When the heat-sensitive agent comprises polyvinyl methyl ether, the dosage of the polyvinyl methyl ether is 2 percent of the weight of the pre-vulcanized natural latex, and the dipped thickness of the product is 2mm, the temperature of the heating hand mould is 85 +/-2 ℃.

(2) And (2) placing the palm surface of the glove obtained in the step (1) on an embossing plate with patterns, pressing the back surface of the glove into the patterns through a pressure device with adjustable pressure, prebaking at low temperature for demoulding, sleeving the glove on the other shaping line, immersing the glove into a water soaking pool for washing, vulcanizing at high temperature for drying, and thus obtaining the natural latex heat-sensitive embossing protective glove.

In the invention, the mechanical embossing is carried out after the palm is impregnated, so that the gripping force and the protective force of the glove are better improved, and the glove has excellent anti-skid performance. Different patterns can be made on the embossing plate according to requirements. Different embossing plate patterns and different anti-skid properties of the glove.

Because the high-temperature vulcanization drying treatment is directly adopted, the surface of the semi-finished product of the natural latex thermosensitive embossing protective glove is easy to form a compact film, and the inner part of the semi-finished product of the natural latex thermosensitive embossing protective glove has more moisture to form bubbles on the surface, so that the defects of the semi-finished product of the natural latex thermosensitive embossing protective glove are caused.

The low-temperature pre-drying temperature is controlled to be 50-100 ℃, and the low-temperature pre-drying time is 15-30 min. The temperature of the high-temperature vulcanization drying is controlled to be 60-125 ℃, the time of the high-temperature vulcanization drying is 30-80 min, and the purposes of the high-temperature vulcanization drying are mainly two: firstly, removing water in the natural latex thermosensitive embossing protective gloves; and secondly, the crosslinking density among the molecules of the pre-vulcanized natural latex is higher.

In the invention, the purpose of washing is to remove the redundant heat-sensitive agent in the natural latex composite slurry, so as to ensure that the natural latex heat-sensitive embossing protective gloves do not harm human bodies. The temperature and time of water washing are determined according to the solubility, the molecular migration speed and the final detection index of the natural latex thermosensitive embossing protective glove.

The temperature of the water washing is controlled to be 20-30 ℃, and the time of the water washing is 10-40 min. The washing can also be directly carried out on-line washing without a soaking pool, the washing can be divided into a plurality of washing steps, and substances which can be washed out by water belong to a state with progressively reduced concentration, so that the washing of the natural latex thermosensitive embossing protective gloves is more facilitated.

The invention only adopts two materials of pre-vulcanized natural latex and a thermosensitive agent diluted by cold water to prepare the natural latex composite slurry and the natural latex thermosensitive embossing protective gloves, thereby saving the materials and reducing the production cost. The heat-sensitive agent is selected from one or a combination of more of polyethylene methyl ether, polyether polyoxymethylene glycol and polypropylene glycol, so that the glove is prevented from penetrating during gum dipping, the injury to a human body is avoided, the glove is energy-saving and environment-friendly, liquid can be prevented from entering the glove, the prepared glove is soft in texture, light and flexible, good in air permeability and not easy to fatigue after being worn for a long time, the glove is particularly suitable for being applied to mechanical operation, the prepared glove has good comprehensive performances of wear resistance, cut resistance, tear resistance, puncture resistance and the like, compared with a natural latex heat-sensitive embossing glove prepared by adopting a zinc-ammonium complex as the heat-sensitive agent, the comprehensive performances of wear resistance, cut resistance, tear resistance, puncture resistance, aging resistance and the like are improved, and the influence on the later-stage aging performance of the glove product and the frosting caused by the later-stage aging performance are.

The natural latex composite slurry and the preparation method of the natural latex heat-sensitive embossing protective gloves provided by the invention have the advantages of simple process, high production efficiency and low production cost, can be used for industrial production, and have high industrial application value.

For better illustration, and to facilitate understanding of the technical solution of the present invention, typical but non-limiting examples of the present invention are as follows:

example 1

A preparation method of natural latex composite slurry comprises the following steps:

(1) and diluting with cold water to prepare 20 mass percent polyvinyl methyl ether, and pre-vulcanizing the natural latex by adopting a sulfur vulcanization system to prepare the pre-vulcanized natural latex.

The prevulcanized natural latex is prepared by vulcanizing a sulfur vulcanization system which is composed of sulfur, zinc diethyldithiocarbamate and zinc oxide and the respective dosage of which is 0.8%, 0.4% and 0.4% of the dry latex content of the concentrated natural latex at 60 ℃ for 2 hours by using the concentrated natural latex with the dry latex content of 60% and the ammonia content of 0.7% as raw materials.

(2) And (2) carrying out constant temperature treatment on the pre-vulcanized natural latex in the step (1), slowly adding the polyvinyl methyl ether diluted by cold water in the step (1) into the pre-vulcanized natural latex in the stirring process after the temperature is constant at 20 ℃, keeping the temperature of the latex constant at 20 ℃ in the whole glue mixing process, and uniformly mixing to obtain the natural latex composite slurry.

Example 2

Example 3

(1) and diluting with cold water to prepare 35% of polyvinyl methyl ether, and pre-vulcanizing the natural latex by adopting a sulfur vulcanization system to prepare the pre-vulcanized natural latex.

Example 4

(1) and diluting with cold water to prepare 50% polyvinyl methyl ether, and presulfurizing natural latex with a sulfur vulcanization system to obtain the presulfurized natural latex.

Example 5

(1) and diluting with cold water to prepare 15 mass percent polyvinyl methyl ether, and pre-vulcanizing the natural latex by adopting a sulfur vulcanization system to prepare the pre-vulcanized natural latex.

Example 6

(1) and diluting with cold water to prepare polypropylene glycol with the mass concentration of 40%, and pre-vulcanizing the natural latex by adopting a sulfur vulcanization system to prepare the pre-vulcanized natural latex.

(2) And (2) carrying out constant temperature treatment on the pre-vulcanized natural latex in the step (1), slowly adding the polypropylene glycol diluted by cold water in the step (1) into the pre-vulcanized natural latex in the stirring process after the temperature is constant at 26 ℃, keeping the latex temperature constant at 26 ℃ in the whole glue mixing process, and uniformly mixing to obtain the natural latex composite slurry.

Example 7

(1) and diluting with cold water to prepare polypropylene glycol with the mass concentration of 30%, and pre-vulcanizing the natural latex by adopting a sulfur vulcanization system to prepare the pre-vulcanized natural latex.

Example 8

(1) respectively adopting cold water to dilute and prepare 20% of polyvinyl methyl ether and 30% of polypropylene glycol, and adopting a sulfur vulcanization system to carry out prevulcanization treatment on the natural latex to prepare prevulcanized natural latex.

(2) And (2) carrying out constant temperature treatment on the pre-vulcanized natural latex in the step (1), slowly adding the polyvinyl methyl ether diluted by cold water in the step (1) and the polypropylene glycol diluted by cold water in the stirring process after the temperature is constant at 20 ℃, wherein the adding weight of the polyvinyl methyl ether accounts for 10% of the weight of the pre-vulcanized natural latex, the adding weight of the polypropylene glycol accounts for 8% of the weight of the pre-vulcanized natural latex, keeping the latex temperature constant at 20 ℃ in the whole glue mixing process, and uniformly mixing to obtain the natural latex composite slurry.

Example 9

(1) and (3) diluting with cold water to prepare polyether polyoxymethylene glycol with the mass concentration of 20%, and performing presulfurization treatment on the natural latex by adopting a sulfur vulcanization system to prepare the presulfurized natural latex.

(2) And (2) carrying out constant temperature treatment on the pre-vulcanized natural latex in the step (1), slowly adding polyether formaldehyde condensation glycol diluted by cold water in the step (1) into the pre-vulcanized natural latex in the stirring process after the temperature is constant at 24 ℃, wherein the adding weight of the polyether formaldehyde condensation glycol accounts for 5% of the weight of the pre-vulcanized natural latex, the latex temperature is kept constant at 24 ℃ in the whole glue mixing process, and uniformly mixing to obtain the natural latex composite slurry.

Example 10

(1) respectively adopting cold water to dilute and prepare 20% of polyvinyl methyl ether and 15% of polyether-formaldehyde polyglycol acetal, and adopting a sulfur vulcanization system to carry out prevulcanization treatment on natural latex so as to prepare prevulcanized natural latex.

(2) And (2) carrying out constant temperature treatment on the pre-vulcanized natural latex in the step (1), slowly adding the polyvinyl methyl ether diluted by cold water in the step (1) and the polyether formaldehyde condensation glycol diluted by cold water in the stirring process after the temperature is constant at 20 ℃, wherein the addition weight of the polyvinyl methyl ether accounts for 8% of the weight of the pre-vulcanized natural latex, the addition weight of the polyether formaldehyde condensation glycol accounts for 12% of the weight of the pre-vulcanized natural latex, keeping the latex temperature constant at 20 ℃ in the whole glue mixing process, and uniformly mixing to obtain the natural latex composite slurry.

Example 11

A preparation method of a natural latex thermosensitive embossed protective glove comprises the following steps:

(3) the hand mold was heated to 110 ℃ for preheating, and then the ten-pin acrylic glove blanks were fitted over the hand mold, and the natural latex composite slurry prepared in example 1 was used for dipping treatment for 4 seconds.

(4) And (2) placing the palm surface of the glove obtained in the step (1) on an embossing plate with patterns, embossing the patterns on the palm surface by a pressure device with adjustable pressure, then placing the glove in a drying oven, drying for 20min at 80 ℃, demolding after pre-drying, sleeving the glove on another shaping line, immersing the glove in a soaking pool, washing for 30min at 25 ℃, then placing the washed glove in a high-temperature drying oven for high-temperature drying, and vulcanizing for 60min at 100 ℃ to finally obtain the product, namely the natural latex heat-sensitive embossing protective glove with the dipping thickness of 3 mm.

Example 12

(1) the hand mold was heated to 90 ℃ to preheat, and then the thirteen-needle polyester glove blanks were fitted over the hand mold, and the natural latex composite slurry prepared in example 2 was used for dipping treatment for 4 seconds.

(2) And (2) placing the palm surface of the glove obtained in the step (1) on an embossing plate with patterns, embossing the patterns on the palm surface by a pressure device with adjustable pressure, then placing the glove in a drying oven, drying for 20min at 70 ℃, demolding after pre-drying, sleeving the glove on another shaping line, immersing the glove in a soaking pool, washing for 30min at 25 ℃, then placing the washed glove in a high-temperature drying oven for high-temperature drying, and vulcanizing for 60min at 110 ℃, thus finally obtaining the product, namely the natural latex heat-sensitive embossing protective glove with the dipping thickness of 2 mm.

Example 13

(1) the hand mold was heated to 90 ℃ to preheat, and then a thirteen-stitch nylon glove blank was fitted over the hand mold, and the natural latex composite slurry prepared in example 3 was used for dipping treatment for 4 seconds.

(2) And (2) placing the palm surface of the glove obtained in the step (1) on an embossing plate with patterns, embossing the patterns on the palm surface by a pressure device with adjustable pressure, then placing the glove in a drying oven, drying for 30min at 50 ℃, demolding after pre-drying, sleeving the glove on another shaping line, immersing the glove in a soaking pool, washing for 40min at 20 ℃, then placing the washed glove in a high-temperature drying oven for high-temperature drying, and vulcanizing for 80min at 100 ℃ to finally obtain the natural latex heat-sensitive embossing protective glove with the dipping thickness of 1 mm.

Example 14

(1) the hand mold was heated to 85 ℃ to preheat, and then the thirteen-needle polyester glove blanks were fitted over the hand mold, and the natural latex composite slurry prepared in example 4 was used for dipping treatment for 4 seconds.

(2) And (2) placing the palm surface of the glove obtained in the step (1) on an embossing plate with patterns, embossing the patterns on the palm surface by a pressure device with adjustable pressure, then placing the glove in a drying oven, drying for 15min at 100 ℃, demolding after pre-drying, sleeving the glove on another shaping line, immersing the glove in a soaking pool, washing for 10min at 30 ℃, then placing the washed glove in a high-temperature drying oven for high-temperature drying, and vulcanizing for 30min at 125 ℃, thus finally obtaining the product, namely the natural latex heat-sensitive embossing protective glove with the dipping thickness of 2 mm.

Example 15

(1) the hand mold was heated to 50 ℃ and preheated, and then the ten-pin glove blanks were fitted over the hand mold and subjected to dipping treatment using the natural latex composite slurry prepared in example 5 for 4 seconds.

(2) And (2) placing the palm surface of the glove obtained in the step (1) on an embossing plate with patterns, embossing the patterns on the palm surface by a pressure device with adjustable pressure, then placing the glove in a drying oven, drying for 30min at 50 ℃, demolding after pre-drying, sleeving the glove on another shaping line, immersing the glove in a soaking pool, washing for 20min at 25 ℃, then placing the washed glove in a high-temperature drying oven for high-temperature drying, and vulcanizing for 80min at 85 ℃, thus finally obtaining the product, namely the natural latex heat-sensitive embossing protective glove with the dipping thickness of 2 mm.

Example 16

(1) the hand mold was heated to 100 ℃ and preheated, and then a ten-pin polyester-cotton glove blank was fitted over the hand mold, and the natural latex composite slurry prepared in example 6 was used for dipping treatment for 4 seconds.

(2) And (2) placing the palm surface of the glove obtained in the step (1) on an embossing plate with patterns, embossing the patterns on the palm surface by a pressure device with adjustable pressure, then placing the glove in a drying oven, drying for 25min at 85 ℃, demolding after pre-drying, sleeving the glove on another shaping line, immersing the glove in a soaking pool, washing for 40min at 30 ℃, then placing the washed glove in a high-temperature drying oven for high-temperature drying, and vulcanizing for 70min at 105 ℃, thus finally obtaining the product, namely the natural latex heat-sensitive embossing protective glove with the dipping thickness of 4 mm.

Example 17

(1) the hand mold was heated to 130 ℃ for preheating, and then the ten-pin acrylic terry glove blank was fitted over the hand mold and subjected to dipping treatment using the natural latex composite slurry prepared in example 7 for 3 seconds.

(2) And (2) placing the palm surface of the glove obtained in the step (1) on an embossing plate with patterns, embossing the patterns on the palm surface by a pressure device with adjustable pressure, then placing the glove in a drying oven, drying for 20min at 80 ℃, demolding after pre-drying, sleeving the glove on another shaping line, immersing the glove in a soaking pool, washing for 40min at 30 ℃, then placing the washed glove in a high-temperature drying oven for high-temperature drying, and vulcanizing for 80min at 120 ℃, thus finally obtaining the product, namely the natural latex heat-sensitive embossing protective glove with the dipping thickness of 2 mm.

Example 18

(1) the hand mold was heated to 90 ℃ to preheat, and then the thirteen-needle polyester glove blanks were fitted over the hand mold, and the natural latex composite slurry prepared in example 8 was used for dipping treatment for 3 seconds.

(2) And (2) placing the palm surface of the glove obtained in the step (1) on an embossing plate with patterns, embossing the patterns on the palm surface by a pressure device with adjustable pressure, then placing the glove in a drying oven, drying for 25min at 60 ℃, demolding after pre-drying, sleeving the glove on another shaping line, immersing the glove in a soaking pool, washing for 40min at 24 ℃, then placing the washed glove in a high-temperature drying oven for high-temperature drying, and vulcanizing for 50min at 110 ℃, thus finally obtaining the product, namely the natural latex heat-sensitive embossing protective glove with the dipping thickness of 2 mm.

Example 19

(1) the hand mold was heated to 110 ℃ and preheated, and a thirteen-needle ultra high molecular weight polyethylene (fibers spun from polyethylene having a molecular weight of 500 ten thousand) glove blank was fitted over the hand mold, and the natural latex composite slurry prepared in example 9 was used for dipping treatment for 4 seconds.

(2) And (2) placing the palm surface of the glove obtained in the step (1) on an embossing plate with patterns, embossing the patterns on the palm surface by a pressure device with adjustable pressure, then placing the glove in a drying oven, drying for 20min at 80 ℃, demolding after pre-drying, sleeving the glove on another shaping line, immersing the glove in a soaking pool, washing for 35min at 20 ℃, placing the washed glove in a high-temperature drying oven for high-temperature drying, and vulcanizing for 70min at 120 ℃, thus finally obtaining the product, namely the natural latex heat-sensitive embossing protective glove with the dipping thickness of 2 mm.

Example 20

(1) the hand mold was heated to 80 ℃ and preheated, and then the thirteen-needle polyester glove blanks were fitted over the hand mold, and the natural latex composite slurry prepared in example 10 was used for dipping treatment for 3 seconds.

(2) And (2) placing the palm surface of the glove obtained in the step (1) on an embossing plate with patterns, embossing the patterns on the palm surface by a pressure device with adjustable pressure, then placing the glove in a drying oven, drying for 30min at 85 ℃, demolding after pre-drying, sleeving the glove on another shaping line, immersing the glove in a soaking pool, washing for 30min at 20 ℃, then placing the washed glove in a high-temperature drying oven for high-temperature drying, and vulcanizing for 60min at 120 ℃, thus finally obtaining the product, namely the natural latex heat-sensitive embossing protective glove with the dipping thickness of 2 mm.

Comparative example 1

A method for preparing a natural latex thermosensitive embossing protective glove is the same as that of example 11, except that the thermosensitive agent polyvinyl methyl ether diluted by cold water in example 1 is replaced by thermosensitive agent zinc ammine complex ion (the dosage is 5% of the weight of the natural latex), and the thickening agent casein is slowly added into the pre-vulcanized natural latex (the dosage is 1% of the weight of the natural latex).

Comparative example 2

A method for preparing a natural latex thermosensitive embossing protective glove is the same as that of example 16, except that the thermosensitive agent polypropylene glycol diluted with cold water in example 6 is replaced by the thermosensitive agent zinc ammine complex ion (the dosage is 20% of the weight of the natural latex), and the thickening agent casein (the dosage is 5% of the weight of the natural latex) is slowly added into the pre-vulcanized natural latex.

Comparative example 3

A method for manufacturing a natural latex thermo-sensitive embossed protective glove, which is the same as that of example 19, except that the thermo-sensitive polyether-polyformaldehyde acetal which is cold-water diluted in example 9 is replaced by the thermo-sensitive zinc ammine (in an amount of 5% by weight of the natural latex), and a thickener casein is slowly added to pre-vulcanized natural latex (in an amount of 1% by weight of the natural latex).

The abrasion resistance, tear resistance, cut resistance, puncture resistance and other performance tests were performed on examples 11 to 20 and comparative examples 1 to 3 according to the EN388 standard, and the aging resistance test was performed at 60 ℃ with the test results shown in Table 1.

TABLE 1

As can be seen from Table 1, compared with the natural latex heat-sensitive embossing protective gloves prepared by using the zinc-ammonia complex ion heat-sensitive agent in the comparative examples 1 to 3, the natural latex heat-sensitive embossing protective gloves prepared in the examples 11 to 20 have excellent wear resistance, cut resistance, tear resistance, puncture resistance and aging resistance.

Specifically, according to the test method of european union EN388 on various performances, the EN388 grade of the natural latex heat-sensitive embossing protective gloves prepared in examples 11 to 18 and 20 reaches 3131, the EN388 grade of the natural latex heat-sensitive embossing protective gloves prepared in example 19 reaches 4544, the natural latex heat-sensitive embossing protective gloves prepared in examples 11 to 20 are aged at 60 ℃, the aging time is kept over 400 hours, wherein, the aging time of the natural latex heat-sensitive embossing protective gloves prepared in the example 20 is even more than 1000h, compared with natural latex heat-sensitive embossing gloves prepared by adopting a zinc-ammonium complex as a heat-sensitive agent (the EN388 grade reaches 3121, aging is carried out at 60 ℃, and the aging time is only maintained at about 240 hours), the wear-resistant, cut-resistant, tear-resistant, puncture-resistant, aging-resistant and other comprehensive performances are improved, and the influence on the aging performance of the glove products in the later period and the frosting caused are avoided.

Furthermore, it can be seen from the comparison of examples 11 to 15 that the abrasion resistance, cut resistance, tear resistance, puncture resistance and aging resistance of the natural latex heat-sensitive embossing protective gloves prepared in example 15 are superior to those of the natural latex heat-sensitive embossing protective gloves prepared in examples 11 to 14, probably due to the increased amount of the polyvinyl methyl ether. Further, as can be seen from the comparison of the performance test results of examples 18 and 20 with those of the other examples, the abrasion resistance, cut resistance, tear resistance, puncture resistance and aging resistance of the natural latex thermo-embossing protective gloves prepared by selecting two thermo-sensitive agent compositions are superior to those of the protective gloves prepared by using a single thermo-sensitive agent.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the present invention in other forms, and any person skilled in the art can change or modify the technical content disclosed above into an equivalent embodiment with equivalent changes. However, any simple modification, equivalent change and modification of the above embodiments according to the technical essence of the present invention are within the protection scope of the technical solution of the present invention.

Claims

1. The natural latex composite slurry is characterized by being prepared by mixing pre-vulcanized natural latex and a cold water diluted thermosensitive agent, wherein the thermosensitive agent is selected from one of polyethylene methyl ether and polypropylene glycol or a combination of several of polyethylene methyl ether, polyether polyoxymethylene glycol and polypropylene glycol.

2. The natural latex composite slurry according to claim 1, wherein the mass concentration of the cold-water-diluted heat-sensitive agent is controlled to be 15-50%.

3. The natural latex composite slurry according to claim 2, wherein the amount of the heat-sensitive agent is 1 to 20% by weight of the pre-vulcanized natural latex, and the amount of the heat-sensitive agent is selected according to the type of the heat-sensitive agent and the thickness of the dipped product.

4. The natural latex composite slurry according to claim 3,

when the heat-sensitive agent is polyvinyl methyl ether:

preparing 20% polyvinyl methyl ether by adopting cold water dilution, wherein the addition weight of the polyvinyl methyl ether accounts for 5% or 8% of the weight of the pre-vulcanized natural latex; alternatively, the first and second electrodes may be,

preparing 35% polyvinyl methyl ether by adopting cold water dilution, wherein the addition weight of the polyvinyl methyl ether accounts for 1% of the weight of the pre-vulcanized natural latex; alternatively, the first and second electrodes may be,

preparing 50% polyvinyl methyl ether by adopting cold water dilution, wherein the addition weight of the polyvinyl methyl ether accounts for 3% of the weight of the pre-vulcanized natural latex; alternatively, the first and second electrodes may be,

preparing 15% polyvinyl methyl ether by adopting cold water dilution, wherein the addition weight of the polyvinyl methyl ether accounts for 12% of the weight of the pre-vulcanized natural latex;

when the heat-sensitive agent is polypropylene glycol:

adopting cold water to dilute and prepare polypropylene glycol with the mass concentration of 40 percent, wherein the adding weight of the polypropylene glycol accounts for 20 percent of the weight of the pre-vulcanized natural latex; or

Adopting cold water to dilute and prepare polypropylene glycol with the mass concentration of 30 percent, wherein the adding weight of the polypropylene glycol accounts for 10 percent of the weight of the pre-vulcanized natural latex;

when the heat-sensitive agent is the combination of polyvinyl methyl ether and polypropylene glycol:

respectively adopting cold water to dilute and prepare 20% of polyvinyl methyl ether and 30% of polypropylene glycol, wherein the addition weight of the polyvinyl methyl ether accounts for 10% of the weight of the pre-vulcanized natural rubber latex, and the addition weight of the polypropylene glycol accounts for 8% of the weight of the pre-vulcanized natural rubber latex;

when the heat-sensitive agent is the combination of polyvinyl methyl ether and polyether polyformaldehyde acetal diol:

respectively adopting cold water to dilute and prepare 20% of polyvinyl methyl ether and 15% of polyether-formaldehyde-acetal diol, wherein the addition weight of the polyvinyl methyl ether accounts for 8% of the weight of the pre-vulcanized natural latex, and the addition weight of the polyether-formaldehyde-acetal diol accounts for 12% of the weight of the pre-vulcanized natural latex.

5. The natural latex composite slurry according to any one of claims 1 to 4, wherein said prevulcanized natural latex is obtained by prevulcanizing natural latex with a vulcanization system selected from one of a sulfur vulcanization system, a thiuram vulcanization system, a resin vulcanization system, a peroxide vulcanization system, and an oxide vulcanization system.

6. The method for preparing the natural latex composite slurry according to any one of claims 1 to 5, wherein the preparation method comprises the following steps:

7. The method of preparing natural latex composite slurry according to claim 6,

when the heat-sensitive agent is polyvinyl methyl ether:

adopting cold water to dilute and prepare 20 percent of polyvinyl methyl ether, adopting a sulfur vulcanization system to carry out prevulcanization treatment on natural latex to prepare prevulcanization natural latex, wherein, the prevulcanized natural latex is a concentrated natural latex with a dry rubber content of 60 percent and an ammonia content of 0.7 percent as a raw material, a sulfur vulcanization system which consists of sulfur, zinc diethyldithiocarbamate and zinc oxide and has the respective dosage of 0.8 percent, 0.4 percent and 0.4 percent of the dry latex content of the concentrated natural latex is adopted, vulcanizing at 60 deg.C for 2 hr, treating the pre-vulcanized natural latex at constant temperature of 20 deg.C, slowly adding cold water diluted polyvinyl methyl ether into the rubber latex during stirring, wherein the addition weight of the polyvinyl methyl ether accounts for 5% or 8% of the weight of the pre-vulcanized natural rubber latex, keeping the temperature of the rubber latex constant at 20 ℃ during the whole rubber mixing process, and uniformly mixing to obtain natural rubber latex composite slurry; alternatively, the first and second electrodes may be,

adopting cold water to dilute and prepare 35 percent of polyvinyl methyl ether, adopting a sulfur vulcanization system to carry out prevulcanization treatment on natural latex to prepare prevulcanization natural latex, wherein, the prevulcanized natural latex is a concentrated natural latex with a dry rubber content of 60 percent and an ammonia content of 0.7 percent as a raw material, a sulfur vulcanization system which consists of sulfur, zinc diethyldithiocarbamate and zinc oxide and has the respective dosage of 0.8 percent, 0.4 percent and 0.4 percent of the dry latex content of the concentrated natural latex is adopted, vulcanizing at 60 deg.C for 2 hr, treating the pre-vulcanized natural latex at constant temperature of 20 deg.C, slowly adding cold water diluted polyvinyl methyl ether into the rubber latex during stirring, wherein the addition weight of the polyvinyl methyl ether accounts for 1% of the weight of the pre-vulcanized natural rubber latex, keeping the temperature of the rubber latex constant at 20 ℃ during the whole rubber mixing process, and uniformly mixing to obtain natural rubber latex composite slurry; alternatively, the first and second electrodes may be,

adopting cold water to dilute and prepare 50 percent of polyvinyl methyl ether, adopting a sulfur vulcanization system to carry out prevulcanization treatment on natural latex to prepare prevulcanization natural latex, wherein, the prevulcanized natural latex is a concentrated natural latex with a dry rubber content of 60 percent and an ammonia content of 0.7 percent as a raw material, a sulfur vulcanization system which consists of sulfur, zinc diethyldithiocarbamate and zinc oxide and has the respective dosage of 0.8 percent, 0.4 percent and 0.4 percent of the dry latex content of the concentrated natural latex is adopted, vulcanizing at 60 deg.C for 2 hr, treating the pre-vulcanized natural latex at constant temperature of 20 deg.C, slowly adding cold water diluted polyvinyl methyl ether into the rubber latex during stirring, wherein the addition weight of the polyvinyl methyl ether accounts for 3% of the weight of the pre-vulcanized natural rubber latex, keeping the temperature of the rubber latex constant at 20 ℃ during the whole rubber mixing process, and uniformly mixing to obtain natural rubber latex composite slurry; alternatively, the first and second electrodes may be,

adopting cold water to dilute and prepare 15 percent of polyvinyl methyl ether, adopting a sulfur vulcanization system to carry out prevulcanization treatment on natural latex to prepare prevulcanization natural latex, wherein, the prevulcanized natural latex is a concentrated natural latex with a dry rubber content of 60 percent and an ammonia content of 0.7 percent as a raw material, a sulfur vulcanization system which consists of sulfur, zinc diethyldithiocarbamate and zinc oxide and has the respective dosage of 0.8 percent, 0.4 percent and 0.4 percent of the dry latex content of the concentrated natural latex is adopted, vulcanizing at 60 deg.C for 2 hr, treating the pre-vulcanized natural latex at constant temperature of 20 deg.C, slowly adding cold water diluted polyvinyl methyl ether into the rubber latex during stirring, wherein the addition weight of the polyvinyl methyl ether accounts for 12% of the weight of the pre-vulcanized natural rubber latex, keeping the temperature of the rubber latex constant at 20 ℃ during the whole rubber mixing process, and uniformly mixing to obtain natural rubber latex composite slurry;

when the heat-sensitive agent is polypropylene glycol:

diluting with cold water to prepare polypropylene glycol with mass concentration of 40%, presulfurizing natural latex with sulfur vulcanization system to obtain presulfurized natural latex, wherein, the prevulcanized natural latex is a concentrated natural latex with a dry rubber content of 60 percent and an ammonia content of 0.7 percent as a raw material, a sulfur vulcanization system which consists of sulfur, zinc diethyldithiocarbamate and zinc oxide and has the respective dosage of 0.8 percent, 0.4 percent and 0.4 percent of the dry latex content of the concentrated natural latex is adopted, vulcanizing at 60 deg.C for 2 hr, treating the pre-vulcanized natural latex at constant temperature, keeping the temperature constant at 26 deg.C, slowly adding cold water diluted polypropylene glycol into the mixture in the stirring process, wherein the adding weight of the polypropylene glycol accounts for 20 percent of the weight of the pre-vulcanized natural latex, keeping the temperature of the latex constant at 26 ℃ in the whole glue mixing process, and uniformly mixing to obtain natural latex composite slurry; or

Adopting cold water to dilute and prepare polypropylene glycol with the mass concentration of 30 percent, adopting a sulfur vulcanization system to carry out prevulcanization treatment on natural latex to prepare prevulcanization natural latex, wherein, the prevulcanized natural latex is a concentrated natural latex with a dry rubber content of 60 percent and an ammonia content of 0.7 percent as a raw material, a sulfur vulcanization system which consists of sulfur, zinc diethyldithiocarbamate and zinc oxide and has the respective dosage of 0.8 percent, 0.4 percent and 0.4 percent of the dry latex content of the concentrated natural latex is adopted, vulcanizing at 60 deg.C for 2 hr, treating the pre-vulcanized natural latex at constant temperature, keeping the temperature constant at 26 deg.C, slowly adding cold water diluted polypropylene glycol into the mixture in the stirring process, wherein the adding weight of the polypropylene glycol accounts for 10 percent of the weight of the pre-vulcanized natural latex, keeping the temperature of the latex constant at 26 ℃ in the whole glue mixing process, and uniformly mixing to obtain natural latex composite slurry;

respectively diluting with cold water to prepare 20% of polyethylene methyl ether and 30% of polypropylene glycol, pre-vulcanizing natural latex with a sulfur vulcanization system to obtain pre-vulcanized natural latex, wherein the pre-vulcanized natural latex is prepared by taking 60% of dry rubber and 0.7% of ammonia as raw materials, vulcanizing the pre-vulcanized natural latex at 60 ℃ for 2h by using the sulfur vulcanization system consisting of sulfur, zinc diethyldithiocarbamate and zinc oxide, the using amounts of which are respectively 0.8%, 0.4% and 0.4% of the dry latex content of the concentrated natural latex, keeping the temperature constant at 20 ℃, slowly adding the cold water diluted polyethylene methyl ether and the cold water diluted polypropylene glycol into the pre-vulcanized natural latex during stirring, and the adding weight of the polyethylene methyl ether accounts for 10% of the weight of the pre-vulcanized natural latex, the adding weight of the polypropylene glycol accounts for 8 percent of the weight of the pre-vulcanized natural latex, the latex temperature is kept constant at 20 ℃ in the whole glue mixing process, and the natural latex composite slurry is prepared after uniform mixing;

respectively diluting with cold water to prepare 20% of polyethylene methyl ether and 15% of polyether formaldehyde acetal diol, and presulfurizing natural latex by adopting a sulfur vulcanization system to prepare presulfurized natural latex, wherein the presulfurized natural latex is prepared by taking concentrated natural latex with 60% of dry rubber content and 0.7% of ammonia content as raw materials, adopting a sulfur vulcanization system consisting of sulfur, zinc diethyldithiocarbamate and zinc oxide and respectively using 0.8%, 0.4% and 0.4% of the dry latex content of the concentrated natural latex at 60 ℃ for vulcanization for 2 hours, carrying out constant temperature treatment on the presulfurized natural latex, slowly adding the cold water diluted polyethylene methyl ether and the cold water diluted polyether formaldehyde acetal diol into the presulfurized natural latex after the temperature is constant at 20 ℃, wherein the adding weight of the polyethylene methyl ether accounts for 8% of the weight of the presulfurized natural latex during stirring, the adding weight of the polyether formaldehyde polyglycol acetal accounts for 12% of the weight of the pre-vulcanized natural latex, the latex temperature is kept constant at 20 ℃ in the whole glue mixing process, and the natural latex composite slurry is prepared after uniform mixing.

8. The natural latex heat-sensitive embossing protective gloves are characterized by comprising glove blanks located on an inner layer and a natural latex film layer located on an outer layer, wherein the natural latex film layer is prepared from the natural latex composite slurry as claimed in any one of claims 1 to 5.

9. The method of making a latex thermo-sensitive embossed protective glove according to claim 8, wherein the method of making comprises the steps of:

(1) preheating the hand mold, controlling the temperature of the heated hand mold to be 50-130 ℃, sleeving a glove blank on the hand mold, and carrying out dipping treatment on the glove blank by using the natural latex composite slurry, wherein the temperature of the heated hand mold is selected according to the type and the using amount of a heat-sensitive agent and the dipping thickness of a product, and the yarn material for weaving the glove blank is one or more of terylene, chinlon, aramid fiber, acrylic fiber, ultra-high molecular weight polyethylene fiber, cotton yarn, polyester cotton, spandex, glass fiber, steel wire and basalt fiber;

10. The method for preparing the natural latex thermo-sensitive embossed protective gloves according to claim 9,

when the heat-sensitive agent is 20% of polyvinyl methyl ether by mass concentration, the addition weight of the polyvinyl methyl ether accounts for 5% of the weight of the pre-vulcanized natural latex, and the dipping thickness is 3mm, heating the hand mold to 110 ℃ for preheating; or

When the heat-sensitive agent is 20% of polyvinyl methyl ether by mass concentration, the addition weight of the polyvinyl methyl ether accounts for 8% of the weight of the pre-vulcanized natural latex, and the dipping thickness is 2mm, heating the hand mold to 90 ℃ for preheating; or

When the thermosensitive agent is polyvinyl methyl ether with the mass concentration of 35 percent, the adding weight of the polyvinyl methyl ether accounts for 1 percent of the weight of the pre-vulcanized natural latex, and the dipping thickness is 1mm, the hand mold is heated to 90 ℃ for preheating; or

When the heat-sensitive agent is polyvinyl methyl ether with the mass concentration of 50 percent, the adding weight of the polyvinyl methyl ether accounts for 3 percent of the weight of the pre-vulcanized natural latex and the dipping thickness is 2mm, the hand mold is heated to 85 ℃ for preheating; or

When the heat-sensitive agent is 15% of polyvinyl methyl ether by mass concentration, the addition weight of the polyvinyl methyl ether accounts for 12% of the weight of the pre-vulcanized natural latex, and the dipping thickness is 2mm, heating the hand mold to 50 ℃ for preheating; or

When the thermosensitive agent is polypropylene glycol with the mass concentration of 40%, the adding weight of the polypropylene glycol accounts for 20% of the weight of the pre-vulcanized natural latex, and the dipping thickness is 4mm, heating the hand mold to 100 ℃ for preheating; or

When the thermosensitive agent is polypropylene glycol with the mass concentration of 30%, the adding weight of the polypropylene glycol accounts for 10% of the weight of the pre-vulcanized natural latex, and the dipping thickness is 2mm, heating the hand mold to 130 ℃ for preheating; or

When the heat-sensitive agent is 20 mass percent of polyvinyl methyl ether and 30 mass percent of polypropylene glycol, the adding weight of the polyvinyl methyl ether accounts for 10 percent of the weight of the pre-vulcanized natural rubber latex, the adding weight of the polypropylene glycol accounts for 8 percent of the weight of the pre-vulcanized natural rubber latex, and the dipping thickness is 2mm, the hand mold is heated to 90 ℃ for preheating; or

When the heat-sensitive agent is 20% of polyvinyl methyl ether and 15% of polyether-formaldehyde-acetal glycol, the weight of the added polyvinyl methyl ether accounts for 8% of the weight of the pre-vulcanized natural rubber latex, the weight of the added polyether-formaldehyde-acetal glycol accounts for 12% of the weight of the pre-vulcanized natural rubber latex, and the dipping thickness is 2mm, the hand mold is heated to 80 ℃ for preheating.

11. The method for preparing the natural latex thermo-sensitive embossed protective gloves according to claim 9 or 10,

the method comprises the following steps:

(1) heating the hand mould to 110 ℃ for preheating, sleeving a ten-needle acrylic glove blank on the hand mould, and performing dipping treatment by using natural latex composite slurry for 4 s;

(2) placing the palm surface of the glove obtained in the step (1) on an embossing plate with patterns, pressing the patterns on the palm surface by a pressure device with adjustable pressure, then placing the glove in a drying oven, drying for 20min at 80 ℃, demolding after pre-drying, sleeving the glove on another shaping line, immersing the glove in a soaking pool, washing for 30min at 25 ℃, then placing the washed glove in a high-temperature drying oven for high-temperature drying, and vulcanizing for 60min at 100 ℃ to finally obtain the product, namely the natural latex heat-sensitive embossing protective glove with the dipping thickness of 3 mm;

wherein, the natural latex composite slurry is: adopting cold water to dilute and prepare 20 percent of polyvinyl methyl ether, adopting a sulfur vulcanization system to carry out prevulcanization treatment on natural latex to prepare prevulcanization natural latex, wherein, the prevulcanized natural latex is a concentrated natural latex with a dry rubber content of 60 percent and an ammonia content of 0.7 percent as a raw material, a sulfur vulcanization system which consists of sulfur, zinc diethyldithiocarbamate and zinc oxide and has the respective dosage of 0.8 percent, 0.4 percent and 0.4 percent of the dry latex content of the concentrated natural latex is adopted, vulcanizing at 60 deg.C for 2 hr, treating the pre-vulcanized natural latex at constant temperature of 20 deg.C, slowly adding cold water diluted polyvinyl methyl ether into the natural rubber latex during stirring, wherein the addition weight of the polyvinyl methyl ether accounts for 5% of the weight of the pre-vulcanized natural rubber latex, keeping the temperature of the rubber latex constant at 20 ℃ during the whole rubber mixing process, and uniformly mixing to obtain the natural rubber latex composite slurry;

or comprises the following steps:

(1) heating the hand mold to 90 ℃ for preheating, sleeving a thirteen-needle polyester glove blank on the hand mold, and performing dipping treatment by using natural latex composite slurry for 4 seconds;

(2) placing the palm surface of the glove obtained in the step (1) on an embossing plate with patterns, pressing the patterns on the palm surface by a pressure device with adjustable pressure, then placing the glove in a drying oven, drying for 20min at 70 ℃, demolding after pre-drying, sleeving the glove on another shaping line, immersing the glove in a soaking pool, washing for 30min at 25 ℃, then placing the washed glove in a high-temperature drying oven for high-temperature drying, and vulcanizing for 60min at 110 ℃, thus finally obtaining the product dipped natural latex heat-sensitive embossing protective glove with the thickness of 2 mm;

wherein, the natural latex composite slurry is: adopting cold water to dilute and prepare 20 percent of polyvinyl methyl ether, adopting a sulfur vulcanization system to carry out prevulcanization treatment on natural latex to prepare prevulcanization natural latex, wherein, the prevulcanized natural latex is a concentrated natural latex with a dry rubber content of 60 percent and an ammonia content of 0.7 percent as a raw material, a sulfur vulcanization system which consists of sulfur, zinc diethyldithiocarbamate and zinc oxide and has the respective dosage of 0.8 percent, 0.4 percent and 0.4 percent of the dry latex content of the concentrated natural latex is adopted, vulcanizing at 60 deg.C for 2 hr, treating the pre-vulcanized natural latex at constant temperature of 20 deg.C, slowly adding cold water diluted polyvinyl methyl ether into the natural rubber latex during stirring, wherein the addition weight of the polyvinyl methyl ether accounts for 8% of the weight of the pre-vulcanized natural rubber latex, keeping the temperature of the rubber latex constant at 20 ℃ during the whole rubber mixing process, and uniformly mixing to obtain the natural rubber latex composite slurry;

or comprises the following steps:

(1) heating the hand mold to 90 ℃ for preheating, sleeving a thirteen-needle chinlon glove blank on the hand mold, and performing dipping treatment by using natural latex composite slurry for 4 s;

(2) placing the palm surface of the glove obtained in the step (1) on an embossing plate with patterns, pressing the patterns on the palm surface by a pressure device with adjustable pressure, then placing the glove in a drying oven, drying for 30min at 50 ℃, demolding after pre-drying, sleeving the glove on another shaping line, immersing the glove in a soaking pool, washing for 40min at 20 ℃, then placing the washed glove in a high-temperature drying oven for high-temperature drying, and vulcanizing for 80min at 100 ℃ to finally obtain the product, namely the natural latex heat-sensitive embossing protective glove with the dipping thickness of 1 mm;

wherein, the natural latex composite slurry is: adopting cold water to dilute and prepare 35 percent of polyvinyl methyl ether, adopting a sulfur vulcanization system to carry out prevulcanization treatment on natural latex to prepare prevulcanization natural latex, wherein, the prevulcanized natural latex is a concentrated natural latex with a dry rubber content of 60 percent and an ammonia content of 0.7 percent as a raw material, a sulfur vulcanization system which consists of sulfur, zinc diethyldithiocarbamate and zinc oxide and has the respective dosage of 0.8 percent, 0.4 percent and 0.4 percent of the dry latex content of the concentrated natural latex is adopted, vulcanizing at 60 deg.C for 2 hr, treating the pre-vulcanized natural latex at constant temperature of 20 deg.C, slowly adding cold water diluted polyvinyl methyl ether into the natural rubber latex during stirring, wherein the addition weight of the polyvinyl methyl ether accounts for 1% of the weight of the pre-vulcanized natural rubber latex, keeping the temperature of the rubber latex constant at 20 ℃ during the whole rubber mixing process, and uniformly mixing to obtain the natural rubber latex composite slurry;

or comprises the following steps:

(1) heating the hand mold to 85 ℃ for preheating, sleeving a thirteen-needle polyester glove blank on the hand mold, and performing dipping treatment by using natural latex composite slurry for 4 seconds.

(2) Placing the palm surface of the glove obtained in the step (1) on an embossing plate with patterns, pressing the patterns on the palm surface by a pressure device with adjustable pressure, then placing the glove in a drying oven, drying for 15min at 100 ℃, demolding after pre-drying, sleeving the glove on another shaping line, immersing the glove in a soaking pool, washing for 10min at 30 ℃, then placing the washed glove in a high-temperature drying oven for high-temperature drying, and vulcanizing for 30min at 125 ℃, thus finally preparing the product dipped natural latex heat-sensitive embossing protective glove with the thickness of 2 mm;

wherein, the natural latex composite slurry is:

adopting cold water to dilute and prepare 50 percent of polyvinyl methyl ether, adopting a sulfur vulcanization system to carry out prevulcanization treatment on natural latex to prepare prevulcanization natural latex, wherein, the prevulcanized natural latex is a concentrated natural latex with a dry rubber content of 60 percent and an ammonia content of 0.7 percent as a raw material, a sulfur vulcanization system which consists of sulfur, zinc diethyldithiocarbamate and zinc oxide and has the respective dosage of 0.8 percent, 0.4 percent and 0.4 percent of the dry latex content of the concentrated natural latex is adopted, vulcanizing at 60 deg.C for 2 hr, treating the pre-vulcanized natural latex at constant temperature of 20 deg.C, slowly adding cold water diluted polyvinyl methyl ether into the natural rubber latex during stirring, wherein the addition weight of the polyvinyl methyl ether accounts for 3% of the weight of the pre-vulcanized natural rubber latex, keeping the temperature of the rubber latex constant at 20 ℃ during the whole rubber mixing process, and uniformly mixing to obtain the natural rubber latex composite slurry;

or comprises the following steps:

(1) heating the hand mold to 50 ℃ for preheating, sleeving a ten-needle pure cotton glove blank on the hand mold, and performing dipping treatment by using natural latex composite slurry for 4 seconds.

(2) Placing the palm surface of the glove obtained in the step (1) on an embossing plate with patterns, pressing the patterns on the palm surface by a pressure device with adjustable pressure, then placing the glove in a drying oven, drying for 30min at 50 ℃, demolding after pre-drying, sleeving the glove on another shaping line, immersing the glove in a soaking pool, washing for 20min at 25 ℃, then placing the washed glove in a high-temperature drying oven for high-temperature drying, and vulcanizing for 80min at 85 ℃, thus finally preparing the natural latex heat-sensitive embossing protective glove with the dipping thickness of 2 mm;

wherein, the natural latex composite slurry is:

adopting cold water to dilute and prepare 15 percent of polyvinyl methyl ether, adopting a sulfur vulcanization system to carry out prevulcanization treatment on natural latex to prepare prevulcanization natural latex, wherein, the prevulcanized natural latex is a concentrated natural latex with a dry rubber content of 60 percent and an ammonia content of 0.7 percent as a raw material, a sulfur vulcanization system which consists of sulfur, zinc diethyldithiocarbamate and zinc oxide and has the respective dosage of 0.8 percent, 0.4 percent and 0.4 percent of the dry latex content of the concentrated natural latex is adopted, vulcanizing at 60 deg.C for 2 hr, treating the pre-vulcanized natural latex at constant temperature of 20 deg.C, slowly adding cold water diluted polyvinyl methyl ether into the natural rubber latex during stirring, wherein the addition weight of the polyvinyl methyl ether accounts for 12% of the weight of the pre-vulcanized natural rubber latex, keeping the temperature of the rubber latex constant at 20 ℃ during the whole rubber mixing process, and uniformly mixing to obtain the natural rubber latex composite slurry.

Or comprises the following steps:

(1) heating the hand mold to 100 ℃ for preheating, sleeving a ten-needle polyester cotton glove blank on the hand mold, and performing dipping treatment by using natural latex composite slurry for 4 seconds.

(2) Placing the palm surface of the glove obtained in the step (1) on an embossing plate with patterns, pressing the patterns on the palm surface by a pressure device with adjustable pressure, then placing the glove in a drying oven, drying for 25min at 85 ℃, demolding after pre-drying, sleeving the glove on another shaping line, immersing the glove in a soaking pool, washing for 40min at 30 ℃, then placing the washed glove in a high-temperature drying oven for high-temperature drying, and vulcanizing for 70min at 105 ℃, thus finally preparing the natural latex heat-sensitive embossing protective glove with the dipping thickness of 4 mm;

wherein, the natural latex composite slurry is:

diluting with cold water to prepare polypropylene glycol with mass concentration of 40%, presulfurizing natural latex with sulfur vulcanization system to obtain presulfurized natural latex, wherein, the prevulcanized natural latex is a concentrated natural latex with a dry rubber content of 60 percent and an ammonia content of 0.7 percent as a raw material, a sulfur vulcanization system which consists of sulfur, zinc diethyldithiocarbamate and zinc oxide and has the respective dosage of 0.8 percent, 0.4 percent and 0.4 percent of the dry latex content of the concentrated natural latex is adopted, vulcanizing at 60 deg.C for 2 hr, treating the pre-vulcanized natural latex at constant temperature, keeping the temperature constant at 26 deg.C, slowly adding cold water diluted polypropylene glycol into the natural latex during stirring, wherein the adding weight of the polypropylene glycol accounts for 20% of the weight of the pre-vulcanized natural latex, keeping the temperature of the latex constant at 26 ℃ during the whole glue mixing process, and uniformly mixing to obtain the natural latex composite slurry;

or comprises the following steps:

(1) heating the hand mould to 130 ℃ for preheating, sleeving a ten-pin acrylic terry glove blank on the hand mould, and performing dipping treatment by using natural latex composite slurry for 3 seconds;

(2) placing the palm surface of the glove obtained in the step (1) on an embossing plate with patterns, pressing the patterns on the palm surface by a pressure device with adjustable pressure, then placing the glove in a drying oven, drying for 20min at 80 ℃, demolding after pre-drying, sleeving the glove on another shaping line, immersing the glove in a soaking pool, washing for 40min at 30 ℃, then placing the washed glove in a high-temperature drying oven for high-temperature drying, and vulcanizing for 80min at 120 ℃, thus finally preparing the natural latex heat-sensitive embossing protective glove with the dipping thickness of 2 mm;

wherein, the natural latex composite slurry is:

adopting cold water to dilute and prepare polypropylene glycol with the mass concentration of 30 percent, adopting a sulfur vulcanization system to carry out prevulcanization treatment on natural latex to prepare prevulcanization natural latex, wherein, the prevulcanized natural latex is a concentrated natural latex with a dry rubber content of 60 percent and an ammonia content of 0.7 percent as a raw material, a sulfur vulcanization system which consists of sulfur, zinc diethyldithiocarbamate and zinc oxide and has the respective dosage of 0.8 percent, 0.4 percent and 0.4 percent of the dry latex content of the concentrated natural latex is adopted, vulcanizing at 60 deg.C for 2 hr, treating the pre-vulcanized natural latex at constant temperature, keeping the temperature constant at 26 deg.C, slowly adding cold water diluted polypropylene glycol into the natural latex during stirring, wherein the adding weight of the polypropylene glycol accounts for 10% of the weight of the pre-vulcanized natural latex, keeping the temperature of the latex constant at 26 ℃ during the whole glue mixing process, and uniformly mixing to obtain the natural latex composite slurry;

or comprises the following steps:

(1) heating the hand mold to 90 ℃ for preheating, sleeving a thirteen-needle polyester glove blank on the hand mold, and performing dipping treatment by using natural latex composite slurry for 3 seconds;

(2) placing the palm surface of the glove obtained in the step (1) on an embossing plate with patterns, pressing the patterns on the palm surface by a pressure device with adjustable pressure, then placing the glove in a drying oven, drying for 25min at 60 ℃, demolding after pre-drying, sleeving the glove on another shaping line, immersing the glove in a soaking pool, washing for 40min at 24 ℃, then placing the washed glove in a high-temperature drying oven for high-temperature drying, and vulcanizing for 50min at 110 ℃, thus finally obtaining the product dipped natural latex heat-sensitive embossing protective glove with the thickness of 2 mm;

wherein, the natural latex composite slurry is:

or comprises the following steps:

(1) heating the hand mold to 80 ℃ for preheating, sleeving a thirteen-needle polyester glove blank on the hand mold, and performing dipping treatment by using natural latex composite slurry for 3 seconds;

(2) placing the palm surface of the glove obtained in the step (1) on an embossing plate with patterns, pressing the patterns on the palm surface by a pressure device with adjustable pressure, then placing the glove in a drying oven, drying for 30min at 85 ℃, demolding after pre-drying, sleeving the glove on another shaping line, immersing the glove in a soaking pool, washing for 30min at 20 ℃, then placing the washed glove in a high-temperature drying oven for high-temperature drying, and vulcanizing for 60min at 120 ℃, thus finally preparing the natural latex heat-sensitive embossing protective glove with the dipping thickness of 2 mm;

wherein, the natural latex composite slurry is: