CN114654836B

CN114654836B - Detectable layer for protective equipment, protective equipment and manufacturing method thereof

Info

Publication number: CN114654836B
Application number: CN202210332692.4A
Authority: CN
Inventors: 陈晓威; 郑成
Original assignee: Andanda Industrial Technology Shanghai Co ltd
Current assignee: Andanda Industrial Technology Shanghai Co ltd
Priority date: 2022-03-30
Filing date: 2022-03-30
Publication date: 2023-09-26
Anticipated expiration: 2042-03-30
Also published as: CN114654836A

Abstract

The application provides a detectable layer comprising a glue layer and a metal layer. The dipping layer comprises 100 parts by weight of nitrile latex based on 100 parts by weight of nitrile latex; 20 to 50 parts by weight of tantalum powder with the grain diameter of 1 to 10 mu m; 5 parts by weight of a thickener; and 4 to 8 parts by weight of other agents for producing elastomeric articles. The metal layer is tantalum powder with the particle size of 25-55 mu m, and the weight of the metal layer accounts for 50-80% of the weight of the detectable layer; the metal layer is sandwiched between two glue dipping layers above and below. The detectable layer is disposed in an interlayer of the protective equipment, and a small volume of protective equipment residue can be detected by the instrument. Meanwhile, the application provides detectable protective equipment, such as gloves, which has excellent detectability, simultaneously has mechanical property and chemical resistance, and can reach 0.15-0.2 mm of radiation-proof lead equivalent. In addition, the application also provides a manufacturing method of the detectable layer and the protective equipment.

Description

Detectable layer for protective equipment, protective equipment and manufacturing method thereof

Technical Field

The application relates to the technical field of protective equipment, in particular to a detectable composition, detectable protective equipment and a manufacturing method of the detectable protective equipment.

Background

Currently, disposable gloves are used in a large number in the industry, including chemical protective gloves, cut protective gloves, and the like. However, during food processing and mechanical production, these gloves may wear, chip, nick, tear, etc. during use, potentially causing them to become entrained within the treatment object; meanwhile, the glove is also often damaged or forgotten in the production line after being used, which not only causes serious risks to the operation of mechanical equipment, but also causes potential safety hazards to the use of consumers.

The existing solution is to manufacture gloves by selecting protective products which are more wear-resistant and cut-resistant so as to reduce the inclusion risk caused by sleeve damage; and reducing the omission or any discarding of gloves by enhancing field supervision after use. However, in practice, it is found that the inclusion of glove scraps is difficult to be perceived by a human body, and the glove is difficult to find after being lost or forgotten, so that the existing method cannot solve the problems well.

Disclosure of Invention

To solve the above-mentioned problems, a first object of the present application is to provide a detectable layer of a protective device, which further comprises a glue layer and a metal layer. The dipping layer comprises the following components in parts by weight based on 100 parts by weight of the nitrile latex: 100 parts by weight of nitrile latex, 20 to 50 parts by weight of tantalum powder with the particle size of 1 to 10 micrometers (mu m) and 5 parts by weight of thickener; the metal layer is formed by tantalum powder with the particle size of 25-55 mu m, and the weight of the metal layer accounts for 50-80% of the weight of the detectable layer; the metal layer is sandwiched between two glue dipping layers above and below. That is to say, the detectable layer is a sandwich-like arrangement of the dipping layer, the metal layer and the dipping layer.

The detectable layer of this technical scheme can all detect its residue through metal detector (for example but not limited to be used for food) or X ray to avoid having the product inflow of inclusion to lead to the fact the potential safety hazard on the market, also can in time detect its position under the circumstances that protective equipment was lost or lost simultaneously, avoid causing adverse effect to the production line. And because a uniform and compact metal layer is added between the impregnation layers, and the metal layer has no glue content, the detectability and the mechanical strength of the detectable layer when the detectable layer is used for protective equipment are improved, and particularly under the condition of the same thickness, the detectability can be improved by 2-4 times compared with common detectable equipment.

In the above-described embodiments, the thickening agent includes, but is not limited to, carboxymethyl cellulose, glycerin, sugar and sugar alcohols, maltodextrin, polysaccharides, polyglycerols, starches, modified starches, and mixtures thereof, etc., capable of achieving the thickening objective.

Further, the size layer further includes 4 to 8 parts by weight of an agent for producing an elastomer selected from at least one of a stabilizer, a nonionic surfactant, an emulsifier, an antioxidant, a vulcanizing agent, an accelerator, a polymerization initiator, an antifoaming agent, a pigment, a filler, and a sensitizer.

The stabilizers include, but are not limited to, solutions of potassium hydroxide, ammonia, ammonium hydroxide, and/or sodium hydroxide; the nonionic surfactant includes, but is not limited to, polyoxyethylene ether surfactants, alkynol polyether surfactants and other agents capable of playing a role in stabilizing emulsion; such emulsifiers include, but are not limited to, sodium alkylaryl sulfate, sodium alkyl sulfate, or other anionic/nonionic surfactants; such antioxidants include, but are not limited to, hindered aryl amines or polymeric hindered phenols, and wingstand L (the butylated reaction product of p-cresol and dicyclopentadiene); such vulcanizing agents include, but are not limited to, sulfur, phenolic resins; such accelerators include, but are not limited to, zinc Diethyldithiocarbamate (ZDEC), 2' -Dithiodibenzothiazyl (DM), 2-mercaptobenzothiazole (accelerator M); the polymerization initiator includes, but is not limited to, znO, zinc stearate; defoamers include, but are not limited to, naphthalene based defoamers, silicone based defoamers, and other non-hydrocarbon based defoamers or refined oil defoamers of vegetable origin; fillers include, but are not limited to, titanium calcium carbonate, carbon black, or clay; sensitizers include, but are not limited to, polyvinyl methyl ether, polypropylene glycol, ammonium nitrate, and ammonium chloride.

Further, in one embodiment of the present application, 5.2 parts by weight of an agent for producing an elastomer, specifically 0.5 parts by weight of a stabilizer, 0.1 parts by weight of a nonionic surfactant, 0.1 parts by weight of an antifoaming agent, 1.0 parts by weight of a vulcanizing agent, 3.0 parts by weight of a polymerization initiator, and 0.5 parts by weight of an accelerator are included.

Further, the thickness of the detectable layer is 0.1-0.2 mm, and the thickness of the metal layer is 0.05-0.15 mm.

Further, the thickness of the metal layer accounts for 25% -75% of the thickness of the detectable layer.

A second aspect of the application provides a protective device comprising, from the outside to the inside, a wear layer, a detectable layer according to any of the preceding claims, and a comfort layer.

In one embodiment, the wear layer further comprises 4 to 8 parts by weight of an agent for producing an elastomer, based on 100 parts by weight of the nitrile latex in the wear layer. Specifically, in one embodiment, 0.5 parts by weight of a stabilizer, 0.1 parts by weight of a nonionic surfactant, 0.1 parts by weight of an antifoaming agent, 1.0 parts by weight of a vulcanizing agent, 3.0 parts by weight of a polymerization initiator, 0.5 parts by weight of an accelerator, and 1.0 parts by weight of a pigment are included.

In one embodiment, the comfort layer further comprises 10 to 40 parts by weight of cotton fiber, 1 to 8 parts by weight of a thickener, and 5 to 9 parts by weight of an agent for producing an elastomer, based on 100 parts by weight of the nitrile latex in the comfort layer. Wherein the fibers include, but are not limited to, cotton fibers, polyester fibers, and acrylic fibers. Specifically, in the comfort layer of one embodiment of the present application, 0.5 parts by weight of a stabilizer, 2.0 parts by weight of an antifoaming agent, 1.0 parts by weight of a vulcanizing agent, 3.0 parts by weight of a polymerization initiator, and 0.5 parts by weight of an accelerator are included.

Further, in the above technical solution, the weights of the nitrile latex in the wear layer, the detectable layer and the comfort layer of the detectable protective device are equal. And each of the agents for producing an elastomer may be the same or different.

Further, the detectable protective equipment of the present application includes, but is not limited to, gloves, protective clothing, protective boots.

Further, the thickness of the detectable protective device is 0.2-0.4 mm, wherein the thickness of the wear-resistant layer is 0.05-0.3 mm, the thickness of the detectable layer is 0.1-0.2 mm, and the thickness of the comfortable layer is 0.05-0.1 mm.

When the detectable protective device of the present application is a glove, 0.05mm can be detected by either a metal detector or X-rays ³ Glove residue from volume inspection. According to EN388:2016 to measure the mechanical hazard, the abrasion resistance (i.e. the number of rounds required by a standard instrument to abrade a sample at a certain speed) can reach a level of 2%>500 circles) to 4 grades>8000 turns), the cutting resistance (the number of times required for cutting the sample can be up to 1 grade%>1.2 times), the tear resistance (force required for sample to crack by stretching with standard instrument) can reach 1 level%>10N), puncture resistance of grade 1>20N). According to EN37:2016 the chemical resistance was tested and the permeation resistance to methanol was 30 to 60 minutes, to n-heptane was over 480 minutes, and to concentrated sulfuric acid was 30 to 60 minutes. According to EN421:2010, the lead equivalent of radiation protection can reach 0.15-0.2 mm.

A third aspect of the present application provides the method for manufacturing a detectable layer according to the above technical solution, comprising the steps of dipping, spraying, and then dipping in sequence. Wherein, the dipping step is used for forming a dipping layer; the spraying step is to uniformly spray tantalum powder on the formed dipping layer to form a metal layer; the dipping step is used for forming a dipping layer covering the metal layer. The metal layer of the detectable layer manufactured by the method is compact, and has no glue impurity, so that the mechanical strength and the detectability of the protective equipment are improved when the detectable layer is used for the protective equipment.

A fourth aspect of the present application provides the method for manufacturing a protective device according to the above-mentioned aspect, comprising, in order: (1) mold treatment: comprises the steps of acid washing, alkali washing and water washing of the die; (2) preparing a wear-resistant layer; (3) preparing a detectable layer; (4) preparing a comfort layer; and (5) demolding. Wherein the detectable layer is made by the manufacturing method provided in the third aspect of the application.

Drawings

Fig. 1 is a schematic structural diagram of a protective device provided by the present application.

Detailed Description

Further advantages and effects of the present application will become apparent to those skilled in the art from the disclosure of the present specification, by describing the embodiments of the present application with specific examples. While the description of the application will be described in connection with the preferred embodiments, it is not intended to limit the inventive features to the implementation. Rather, the purpose of the application described in connection with the embodiments is to cover other alternatives or modifications, which may be extended by the claims based on the application. The following description contains many specific details for the purpose of providing a thorough understanding of the present application. The application may be practiced without these specific details. Furthermore, some specific details are omitted from the description in order to avoid obscuring the application. It should be noted that, without conflict, the embodiments of the present application and features of the embodiments may be combined with each other.

If an amount, concentration, or other value or parameter is expressed as a range, preferred range, or a series of upper limits and lower limits, this is to be understood as specifically disclosed herein as any pair of the upper limit or preferred value of that range and the lower limit or preferred value of that range, whether or not those ranges are separately disclosed. Furthermore, where a range of numerical values is recited herein, unless otherwise stated, the range is intended to include the endpoints thereof, and all integers and fractions within the range.

In this context, numerical values should be understood to have the accuracy of the numerical significance of the numerical values provided that the objectives of the present application are achieved. For example, the number 40.0 should be understood to cover the range of 39.50 to 40.49.

For the purpose of making the objects, technical solutions and advantages of the present application more apparent, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

The embodiment of the application provides a manufacturing method of protective equipment, which is a glove, wherein the glove is provided with the detectable layer provided by the application, and the method comprises the following steps:

and (3) mold treatment:

and (3) carrying out acid washing, first water washing, alkali washing, second water washing, brushing and spraying on the die. Wherein the pH value of the pickling solution in the pickling process is 2-4, the pH value of the alkaline solution in the alkaline washing is 10-12, and the temperature of the first washing and the second washing is 50 ℃.

The mold subjected to the above washing step was preheated at 50 c, and the preheated hand mold was immersed in the coagulant solution. The coagulant solution adopted in the embodiment of the application comprises the following formula: 65 parts by weight of water, 50 parts by weight of calcium nitrate, 0.11 part by weight of nonionic surfactant and 0.66 part by weight of defoamer. However, the coagulant is not limited thereto, and calcium nitrate or calcium chloride solution with other mass concentration can be used; in addition, other additives such as coagulant polymer, dispersing agent and the like can be added in the preparation of the coagulant to adjust the thickness of the glove.

Preparing a wear-resistant layer:

the hand mould impregnated with the coagulating agent is immersed in the raw material, and the raw material for preparing the wear-resistant layer comprises 100 parts by weight of nitrile latex and 4-8 parts by weight of reagent for producing the elastomer. Specifically, the agent for producing the elastomer was 0.5 parts by weight of a stabilizer, 0.1 parts by weight of a nonionic surfactant, 0.1 parts by weight of an antifoaming agent, 1.0 parts by weight of a vulcanizing agent, 3.0 parts by weight of a polymerization initiator, 0.5 parts by weight of an accelerator, and 1.0 parts by weight of a pigment. The impregnation time may be 3 to 5 seconds.

Then, pre-drying is carried out at 50 ℃, and the hand mould subjected to the first pre-drying is immersed into the raw material of the wear-resistant layer for 30-90 s; and then a second predrying is carried out at 50 ℃.

The thickness of the formed wear-resistant layer is 0.05-0.3 mm.

Preparing a detectable layer:

dipping step: immersing the above-mentioned mold having the wear-resistant layer formed therein in a raw material for preparing a detectable layer, the raw material comprising 100 parts by weight of nitrile latex; 20-50 parts by weight of tantalum powder with the particle size of 1-10 mu m, wherein the weight of the tantalum powder accounts for 2% -5% of the weight of the detectable layer; 5 parts by weight of a thickener; and 4 to 8 parts by weight of an agent for producing an elastomer. For example, the agent for producing the elastomer is 0.5 parts by weight of a stabilizer, 0.1 parts by weight of a nonionic surfactant, 0.1 parts by weight of an antifoaming agent, 1.0 parts by weight of a vulcanizing agent, 3.0 parts by weight of a polymerization initiator, 0.5 parts by weight of an accelerator. The dipping speed is 10-30 mm/s, the dipping depth is 250-400 mm, and the dipping time is 30-90 s, so as to form a dipping layer of the detectable layer.

And (3) spraying: tantalum powder with the particle size of 25-55 mu m is sprayed on the formed dipping layer and dried for 10-20 min at the temperature of 50-80 ℃ to form a uniform and compact metal layer.

And (3) gum dipping: immersing again in the raw materials for preparing the detectable layer, and drying at 50-80 ℃ for 10-20 min to form a dipping layer so as to cover the metal layer.

The final detectable layer structure is a glue dipping layer, a metal layer and a glue dipping layer. Wherein the thickness of the detectable layer is 0.1-0.2 mm, and the thickness of the metal layer is 0.05-0.15 mm.

Preparation of comfort layer:

the above-mentioned mold having formed the detectable layer is immersed in a raw material for preparing a comfort layer, the raw material comprising 100 parts by weight of nitrile latex, 10 to 40 parts by weight of cotton fiber, 1 to 8 parts by weight of thickener, and 5 to 9 parts by weight of agent for producing an elastomer. Specifically, the agent for producing an elastomer is 0.5 parts by weight of a stabilizer, 2.0 parts by weight of a defoaming agent, 1.0 parts by weight of a vulcanizing agent, 3.0 parts by weight of a polymerization initiator, 0.5 parts by weight of an accelerator, the dipping speed is 10 to 30mm/s, the dipping depth is 250 to 400mm, and the dipping time is 30 to 90s.

And then drying at 50-80 ℃ for 10-20 min.

The thickness of the formed comfortable layer is 0.05-0.1 mm, and the glove with the formed comfortable layer is cooled in water at the temperature of 10-25 ℃ for 5-10 min.

Optionally, the release layer is immersed after the foregoing steps are completed, and the specific manner is not limited, but the limitation of the thickness of the protective device according to the present application needs to be satisfied.

Demolding:

demoulding is carried out after all the steps are completed, and finally the detectable protective glove with the thickness of 0.2-0.4 mm is obtained.

In the above embodiment, the chemical reagents selected are as follows:

1. stabilizing agent: 5% aqueous potassium hydroxide solution, self-making;

2. nonionic surfactant: rhodoline 1865, available from Solvidemia;

3. defoaming agent: EASYTECH DF-965 from Yitai;

4. vulcanizing agent: sulphur dispersion, purchased from rayleigh chemical (Shanghai) limited;

5. polymerization initiator: znO, zinc oxide aqueous dispersion, hangzhou Hengge nanotechnology Co., ltd;

6. and (3) an accelerator: zinc diethyldithiocarbamate, ZDEC, available from rayleigh chemical (Shanghai) limited;

7. and (3) pigment: blue paste, phthalocyanine blue, purchased from lautsen chemical new materials (Shenzhen) limited;

8. and (3) a thickening agent: sodium carboxymethylcellulose, CMC, purchased from national pharmaceutical group chemicals limited;

9. cotton fiber: cotton, purchased from gallery Zengpeng energy saving technology limited;

10. nitrile latex: 6617 from Synthomer.

The glove produced by the method and the reagent has the following effects:

minimum detectability: can detect 0.05mm by metal detector or X-ray ³ Glove residue from volume inspection.

According to EN388:2016, the abrasion resistance of the steel sheet can reach 2 grades (> 500 circles) to 4 grades (> 8000 circles), the cutting resistance can reach 1 grade (> 1.2 times), the tear resistance can reach 1 grade (> 10N), and the puncture resistance can reach 1 grade (> 20N).

According to EN37:2016 to the chemical resistance test, the penetration resistance to methanol reaches 30-60 min, the penetration resistance to n-heptane exceeds 480min, and the penetration resistance to concentrated sulfuric acid reaches 30-60 min.

According to EN421:2010, performing radiation protection test on the alloy, wherein the equivalent weight of the radiation protection lead is 0.15-0.2 mm.

While the application has been shown and described with reference to a preferred embodiment thereof, it will be understood by those skilled in the art that the foregoing is a further detailed description of the application with reference to specific embodiments, and it is not intended to limit the application to the specific embodiments described. Various changes in form and detail may be made therein by those skilled in the art, including a few simple inferences or alternatives, without departing from the spirit and scope of the present application.

Claims

1. A detectable layer of protective equipment comprising a size layer and a metal layer;

the dipping layer comprises the following components in parts by weight based on 100 parts by weight of the nitrile latex:

100. nitrile latex in parts by weight;

20-50 parts by weight of tantalum powder with a particle size of 1-10 microns; and

5. a thickener in parts by weight;

the metal layer is formed by tantalum powder with the particle size of 25-55 microns, and the weight of the metal layer accounts for 50-80% of the weight of the detectable layer;

the metal layer is sandwiched between the two glue dipping layers.

2. The detectable layer of claim 1, wherein the size layer further comprises 4 to 8 parts by weight of an agent for producing an elastomer selected from at least one of stabilizers, nonionic surfactants, emulsifiers, antioxidants, vulcanizing agents, accelerators, polymerization initiators, defoamers, pigments, fillers, and sensitizers.

3. The detectable layer of claim 2, wherein the agent for producing the elastomer comprises 0.5 parts by weight of a stabilizer, 0.1 parts by weight of a nonionic surfactant, 0.1 parts by weight of an antifoaming agent, 1.0 parts by weight of a vulcanizing agent, 3.0 parts by weight of a polymerization initiator, and 0.5 parts by weight of an accelerator.

4. The detectable layer of claim 1 or 2, wherein the detectable layer has a thickness of 0.1 to 0.2mm and the metal layer has a thickness of 0.05 to 0.15mm.

5. The detectable layer of claim 1 or 2, wherein the metal layer has a thickness of 25% to 75% of the thickness of the detectable layer.

6. A protective apparatus comprising, from outside to inside: a wear-resistant layer;

a detectable layer as claimed in any one of claims 1 to 5; and, a comfort layer.

7. The protective apparatus of claim 6, wherein the wear layer further comprises 4 to 8 parts by weight of an agent for producing an elastomer based on 100 parts by weight of nitrile latex in the wear layer.

8. The protective apparatus according to claim 7, wherein in the abrasion-resistant layer, the agent for producing an elastomer comprises 0.5 parts by weight of a stabilizer, 0.1 parts by weight of a nonionic surfactant, 0.1 parts by weight of an antifoaming agent, 1.0 parts by weight of a vulcanizing agent, 3.0 parts by weight of a polymerization initiator, 0.5 parts by weight of an accelerator,

1.0 Pigment in parts by weight.

9. The protective apparatus of claim 6, wherein the comfort layer further comprises 10 to 40 parts by weight of cotton fiber, 1 to 8 parts by weight of a thickener, and 5 to 9 parts by weight of an agent for producing an elastomer, based on 100 parts by weight of nitrile latex in the comfort layer.

10. The protective apparatus of claim 9, wherein in the comfort layer, the agent for producing an elastomer comprises 0.5 parts by weight of a stabilizer, 2.0 parts by weight of an antifoaming agent, 1.0 parts by weight of a vulcanizing agent, 3.0 parts by weight of a polymerization initiator, and 0.5 parts by weight of an accelerator.

11. The protective equipment of claim 6 comprising gloves, protective clothing, protective boots.

12. The protective apparatus of claim 6, wherein the protective apparatus has a thickness of 0.2 to 0.4mm, wherein the wear layer has a thickness of 0.05 to 0.3mm, the detectable layer has a thickness of 0.1 to 0.2mm, and the comfort layer has a thickness of 0.05 to 0.1mm.

13. The method of manufacturing a detectable layer as claimed in any one of claims 1 to 5, comprising the steps of dipping, spraying, and re-dipping in sequence; the dipping step is used for forming the dipping layer; the spraying step is to uniformly spray tantalum powder on the formed dipping layer so as to form a metal layer; the re-dipping step is used for forming a dipping layer covering the metal layer.

14. A method of manufacturing a protective device according to any one of claims 6 to 12, comprising the steps of, in order:

(1) And (3) mold treatment: comprises the steps of acid washing, alkali washing and water washing of the die;

(2) Preparing the wear-resistant layer;

(3) Preparing a detectable layer, the detectable layer being prepared by the method of claim 13;

(4) Preparing a comfort layer; the method comprises the steps of,

(5) And (5) demolding.