阅读说明：本技术 一种可热塑橡胶面料的制备方法及其可热塑橡胶面料 (Preparation method of thermoplastic rubber fabric and thermoplastic rubber fabric ) 是由 楼力峰 杨奋理 陶武彪 于 2020-05-08 设计创作，主要内容包括：本发明公开了一种可热塑橡胶面料的制备方法,它依次包括塑炼、混炼、混炼胶破碎、胶浆制备、涂布以及硫化工序,其中混炼过程中氯丁橡胶和丁基橡胶按照各自相应的配方进行混炼,待胶浆制备完成后再进行多次反复的涂布操作,经硫化后,最后制成可热塑的橡胶面料。由内之外依次复合于基布层。由本发明的橡胶面料裁剪而成的贴条,不仅本身的化学性能稳定,而且能够以热塑的方式贴合于防护服的接缝处(贴条和防护服结合成一体),因此可以确保防护服接缝处的安全性。(The invention discloses a preparation method of a thermoplastic rubber fabric, which sequentially comprises the working procedures of plastication, mixing, rubber compound crushing, mucilage preparation, coating and vulcanization, wherein chloroprene rubber and butyl rubber are mixed according to respective corresponding formulas in the mixing process, repeated coating operation is carried out for many times after the mucilage preparation is finished, and the thermoplastic rubber fabric is finally prepared after vulcanization. The base cloth layers are compounded from the inside to the outside in sequence. The welt cut from the rubber fabric disclosed by the invention has stable chemical properties, and can be attached to the seam of the protective clothing in a thermoplastic manner (the welt and the protective clothing are combined into a whole), so that the safety of the seam of the protective clothing can be ensured.)

1. The preparation method of the thermoplastic rubber fabric is characterized by comprising the following steps of:

a. plasticating, namely plasticating the chloroprene rubber and the butyl rubber respectively;

b. and (2) mixing, namely mixing the plasticated rubbers respectively to prepare corresponding rubber mixtures, wherein:

adding stearic acid, white carbon black, pigment yellow, an anti-aging agent 4010NA, an anti-aging agent TNP, chlorinated paraffin, decabromodiphenylalkane, N-dodecyl mercaptan, an accelerator NA-101, zinc oxide and magnesium oxide into the plasticated chloroprene rubber for mixing to prepare chloroprene rubber compound, wherein the parts by weight of the chloroprene rubber compound are as follows: 100 parts of chloroprene rubber, 0.8-1.2 parts of stearic acid, 35-45 parts of white carbon black, 0.8-1.5 parts of pigment yellow, 1-3 parts of anti-aging agent 4010NA, 0.5-1.5 parts of anti-aging agent TNP, 15-25 parts of chlorinated paraffin, 35-45 parts of decabromodiphenyl alkane, 1-2 parts of N-dodecyl mercaptan, 1-3 parts of accelerator NA-101, 8-12 parts of zinc oxide and 4-6 parts of magnesium oxide;

adding zinc oxide, stearic acid, light calcium carbonate, pigment yellow, an anti-aging agent 2246, chlorinated paraffin, decabromodiphenylalkane, tetramethyl thiuram disulfide, cyanuric acid, alkylphenol disulfide and sulfur into the plasticated butyl rubber, mixing and preparing a butyl rubber compound, wherein the weight parts of the butyl rubber compound are respectively as follows: 100 parts of butyl rubber, 4-6 parts of zinc oxide, 0.5-1.5 parts of stearic acid, 15-25 parts of light calcium carbonate, 1-3 parts of pigment yellow, 1-2 parts of anti-aging agent 2246, 25-35 parts of chlorinated paraffin, 35-42 parts of decabromodiphenyl alkane, 0.8-1.2 parts of tetramethyl thiuram disulfide, 1-2 parts of cyanuric acid, 1-3 parts of alkylphenol disulfide and 1-2 parts of sulfur;

c. crushing the rubber compound, and respectively cutting the mixed chloroprene rubber compound and butyl rubber compound into particles with the particle size of less than or equal to 5 cm;

d. and (3) preparing mucilage, namely respectively dissolving the crushed particles in an organic solvent, wherein:

dissolving the chloroprene rubber compound into toluene according to the weight part ratio of 0.5:1 to prepare chloroprene rubber compound slurry;

dissolving the butyl rubber compound in solvent gasoline according to the weight portion ratio of 0.5:1 to prepare butyl rubber compound slurry;

e. coating, namely coating at least one layer of each mucilage on the base cloth, and respectively heating and drying each layer of the mucilage to obtain a composite layer blank;

f. and (3) vulcanizing, namely putting the composite layer blank in an environment with the temperature of 80-120 ℃ and the vulcanization pressure of 25-30 kg/cm2 for vulcanization reaction for 3-5 min to obtain the finished rubber fabric.

2. The method for preparing the thermoplastic rubber fabric according to claim 1, wherein the method comprises the following steps:

the chloroprene rubber and the compounding agent respectively comprise the following components in parts by weight: 100 parts of chloroprene rubber, 1 part of stearic acid, 40 parts of white carbon black, 1 part of pigment yellow, 2 parts of an anti-aging agent 4010NA, 1 part of an anti-aging agent TNP, 20 parts of chlorinated paraffin, 40 parts of decabromodiphenyl alkane, 1.5 parts of N-dodecyl mercaptan, 2 parts of an accelerator NA-101, 10 parts of zinc oxide and 5 parts of magnesium oxide;

the butyl rubber and the compounding agent respectively comprise the following components in parts by weight: 100 parts of butyl rubber, 5 parts of zinc oxide, 1 part of stearic acid, 20 parts of light calcium carbonate, 2 parts of pigment yellow, 1.5 parts of an anti-aging agent 2246, 30 parts of chlorinated paraffin, 40 parts of decabromodiphenyl alkane, 1 part of tetramethyl thiuram disulfide, 1.5 parts of cyanuric acid, 2 parts of alkylphenol disulfide and 1.5 parts of sulfur.

3. The method for preparing the thermoplastic rubber fabric according to claim 1, wherein the method comprises the following steps: in the step e, 5 layers of chloroprene mixed rubber cement and 10 layers of butyl mixed rubber cement are sequentially coated on the front surface of the base fabric from inside to outside, and the thickness of each layer is 0.02 mm.

4. The method for preparing the thermoplastic rubber fabric according to claim 1, wherein the method comprises the following steps: in the step f, the composite layer blank is placed in an environment with the temperature of 90 ℃ and the vulcanization pressure of 27kg/cm2 for vulcanization reaction, and the vulcanization reaction lasts for 3 min.

5. The method for preparing the thermoplastic rubber fabric according to claim 1, wherein the method comprises the following steps: before coating, the chloroprene mixing rubber cement is added with a m-methyl-white-cobalt system according to the weight part ratio of 5: 1.

6. The method for preparing the thermoplastic rubber fabric according to claim 1, wherein the method comprises the following steps: the base cloth is release cloth.

7. A thermoplastic rubber fabric is characterized in that: said thermoplastically processable rubber fabric is produced by the process of any one of claims 1 to 6.

Technical Field

The invention relates to the field of fire fighting, in particular to a preparation method of a thermoplastic rubber fabric and the thermoplastic rubber fabric prepared by the method, and the rubber has stable chemical protection performance.

Background

The technical approaches of the chemical protective clothing fabric currently produced in China mainly include a PVC calendering and compounding technology of common civil enterprises and a butyl rubber calendering and compounding and vulcanizing technology of military enterprises. PVC-coated protective fabrics typically employ PVC furring thermoplastic processes to seal the seams of the protective apparel during the manufacture of the protective apparel. Although the PVC welt can be firmly sealed at the seam by adopting the thermoplastic process, the PVC material has poor chemical stability and corrosion resistance, particularly has extremely low chemical permeation resistance, so the protective clothing can only be used as low-end protective clothing for acid and alkali chemicals.

Although the welt and the fabric of the protective clothing can be integrated by adopting a thermoplastic process, no rubber welt which has stable chemical properties and can be subjected to thermoplastic molding exists in the market at present.

Therefore, the manufacturing process of the butyl rubber calendered composite fabric protective clothing still generally adopts a glue brushing process (a glue bonding mode) to seal the seams of the protective clothing. Namely, sewing, cutting the piece (forming the adhesive strip), then adhering the adhesive strip by using glue, and finally pressing. The adhesive tape is made by cutting the protective clothing fabric.

The specific process comprises the following steps:

firstly sewing the joint of the protective clothing, then utilizing glue to attach the welt to the sewing position, and pressing after the glue is dried to be not sticky. The process is a popular method adopted in the domestic market at present, but two problems can not be solved all the time. Firstly, the quality of the brushing process by adopting the glue is unstable. Firstly, the glue itself has instability, and the requirements on the thickness of the glue, the airing time and the temperature and humidity of the environment are very high, so that the requirements on the experience of operators are very high, meanwhile, the glue becomes hard after being dried, the glue is easy to crack after a long time, and particularly, stress concentration is easily formed at some special parts to cause cracking. Secondly, the efficiency of the glue brushing process is low, and the time consumption is long.

Disclosure of Invention

The invention provides a thermoplastic rubber fabric and a preparation method thereof, and aims to provide a thermoplastic rubber fabric with high chemical reliability.

In order to achieve the purpose, the technical scheme provided by the invention is as follows:

a preparation method of a thermoplastic rubber fabric comprises the following steps:

a. plasticating, namely plasticating the chloroprene rubber and the butyl rubber respectively;

b. and (2) mixing, namely mixing the plasticated rubbers respectively to prepare corresponding rubber mixtures, wherein:

adding stearic acid, white carbon black, pigment yellow, an anti-aging agent 4010NA, an anti-aging agent TNP, chlorinated paraffin, decabromodiphenylalkane, N-dodecyl mercaptan, an accelerator NA-101, zinc oxide and magnesium oxide into the plasticated chloroprene rubber for mixing to prepare chloroprene rubber compound, wherein the parts by weight of the chloroprene rubber compound are as follows: 100 parts of chloroprene rubber, 0.8-1.2 parts of stearic acid, 35-45 parts of white carbon black, 0.8-1.5 parts of pigment yellow, 1-3 parts of anti-aging agent 4010NA, 0.5-1.5 parts of anti-aging agent TNP, 15-25 parts of chlorinated paraffin, 35-45 parts of decabromodiphenyl alkane, 1-2 parts of N-dodecyl mercaptan, 1-3 parts of accelerator NA-101, 8-12 parts of zinc oxide and 4-6 parts of magnesium oxide;

adding zinc oxide, stearic acid, light calcium carbonate, pigment yellow, an anti-aging agent 2246, chlorinated paraffin, decabromodiphenylalkane, tetramethyl thiuram disulfide, cyanuric acid, alkylphenol disulfide and sulfur into the plasticated butyl rubber, mixing and preparing a butyl rubber compound, wherein the weight parts of the butyl rubber compound are respectively as follows: 100 parts of butyl rubber, 4-6 parts of zinc oxide, 0.5-1.5 parts of stearic acid, 15-25 parts of light calcium carbonate, 1-3 parts of pigment yellow, 1-2 parts of anti-aging agent 2246, 25-35 parts of chlorinated paraffin, 35-42 parts of decabromodiphenyl alkane, 0.8-1.2 parts of tetramethyl thiuram disulfide, 1-2 parts of cyanuric acid, 1-3 parts of alkylphenol disulfide and 1-2 parts of sulfur;

c. crushing the rubber compound, and respectively cutting the mixed chloroprene rubber compound and butyl rubber compound into particles with the particle size of less than or equal to 5 cm;

d. and (3) preparing mucilage, namely respectively dissolving the crushed particles in an organic solvent, wherein:

dissolving the chloroprene rubber compound into toluene according to the weight part ratio of 0.5:1 to prepare chloroprene rubber compound slurry;

dissolving the butyl rubber compound in solvent gasoline according to the weight portion ratio of 0.5:1 to prepare butyl rubber compound slurry; e. coating, namely coating at least one layer of each mucilage on the base cloth, and respectively heating and drying each layer of the mucilage to obtain a composite layer blank;

f. and (3) vulcanizing, namely putting the composite layer blank in an environment with the temperature of 80-120 ℃ and the vulcanization pressure of 25-30 kg/cm2 for vulcanization reaction for 3-5 min to obtain the finished rubber fabric.

In a preferred embodiment, the parts by weight of the neoprene and the compounding agent are: 100 parts of chloroprene rubber, 1 part of stearic acid, 40 parts of white carbon black, 1 part of pigment yellow, 2 parts of an anti-aging agent 4010NA, 1 part of an anti-aging agent TNP, 20 parts of chlorinated paraffin, 40 parts of decabromodiphenyl alkane, 1.5 parts of N-dodecyl mercaptan, 2 parts of an accelerator NA-101, 10 parts of zinc oxide and 5 parts of magnesium oxide;

the butyl rubber and the compounding agent respectively comprise the following components in parts by weight: 100 parts of butyl rubber, 5 parts of zinc oxide, 1 part of stearic acid, 20 parts of light calcium carbonate, 2 parts of pigment yellow, 1.5 parts of an anti-aging agent 2246, 30 parts of chlorinated paraffin, 40 parts of decabromodiphenyl alkane, 1 part of tetramethyl thiuram disulfide, 1.5 parts of cyanuric acid, 2 parts of alkylphenol disulfide and 1.5 parts of sulfur.

In a preferred embodiment, in step e, 5 layers of neoprene and 10 layers of butyl are sequentially coated on the front surface of the base fabric from inside to outside, and each layer has a thickness of 0.02 mm.

In a preferred embodiment, the neoprene paste is added to the neoprene paste at a ratio of 5:1 parts by weight of m-methyl-white-cobalt prior to application.

In a preferred embodiment, in step f, the composite layer blank is subjected to a vulcanization reaction at a temperature of 90 ℃ and a vulcanization pressure of 27kg/cm2 for 3 min.

In a preferred embodiment, the base fabric is a release fabric.

A thermoplastic rubber fabric is characterized in that: said thermoplastically processable rubber fabric is produced by the process of any one of claims 1 to 5.

Compared with the prior art, the technical scheme provided by the invention has the following beneficial effects:

1. after the rubber fabric is cut into the attachment strips, the rubber fabric can be directly subjected to thermoplastic molding at the seams of the protective clothing, so that the rubber fabric and the protective clothing fabric are combined into a whole, and the rubber fabric has ideal bonding strength.

2. The rubber fabric prepared by the invention is prepared by mixing chloroprene rubber and butyl rubber serving as main raw materials according to a corresponding formula, and preparing corresponding mucilage to be coated on base cloth layer by layer, so that the flame-retardant high/low temperature resistant rubber fabric is flame-retardant and can prevent various chemical infiltrations.

3. The welt made of the rubber fabric is stable in chemical performance and can be attached to the seam of the protective clothing in a thermoplastic mode, so that the safety of the seam can be ensured.

Drawings

Fig. 1 is a schematic cross-sectional structure of the present invention.

Detailed Description

For further understanding of the present invention, the present invention will be described in detail with reference to examples, which are provided for illustration of the present invention but are not intended to limit the scope of the present invention.

First, this embodiment is a preferred embodiment of the present invention.

A preparation method of a plastic rubber fabric comprises the following steps:

1. plasticating, namely plasticating the chloroprene rubber and the butyl rubber respectively to ensure that the crude rubber is changed into a plastic substance from an elastomer, and the plasticity of the crude rubber is uniform to prepare for subsequent mulling. The plastication temperature is generally 40-70 ℃ and the time is 10-20 min.

2. And (3) mixing, namely mixing the chloroprene rubber and the butyl rubber according to the formula requirement. The purpose is to supplement various auxiliary agents into the raw rubber, so that the physical and chemical properties of the rubber compound meet the design requirements, the rubber compound meets the production process conditions of the rubber compound, and the rubber compound is convenient to produce. For example, the strengthening agent improves the strength, the plasticizer improves the flow and conforms to the hardness, the special auxiliary agent improves the resistivity and the flame retardant rate, and other auxiliary agents provide a good production process and the like. The specific formula is as follows:

chloroprene rubber formula (parts by mass)

Neoprene	100	Chlorinated paraffin	20
				Stearic acid	1	Decabromodiphenylalkane	40
White carbon black	40	N-dodecyl mercaptan	1.5
				Pigment yellow	1	Accelerant NA-101	2
Anti-aging agent 4010NA	2	Zinc oxide	10
				Antiager TNP	1	Magnesium oxide	5

Butyl rubber formula (parts by mass)

Butyl rubber	100	Chlorinated paraffin	30
				Zinc oxide	5	Decabromodiphenylalkane	40
Stearic acid	1	TMTD	1
				Light calcium carbonate	20	TCY	1.5
Pigment yellow	2	Vultac#5	2
				Anti-aging agent 2246	1.5	Sulfur	1.5

Remarking: TMTD tetramethyl thiuram disulfide;

TCY Trithiocyanic acid

Vultac #5 alkylphenol disulfide

3. And crushing the rubber compound, and respectively cutting the chloroprene rubber compound and the butyl rubber compound after mixing into particles with the diameter less than 5 cm. The main purpose is to facilitate the dissolution and the stirring and accelerate the dissolution speed.

4. And (3) preparing mucilage, namely respectively dissolving the crushed particles in respective organic solvents, wherein:

dissolving the chloroprene rubber compound into toluene according to the weight part ratio of 0.5:1 to prepare chloroprene rubber compound slurry;

dissolving the butyl rubber compound in solvent gasoline according to the weight portion ratio of 0.5:1 to prepare butyl rubber compound slurry;

5. and (4) filtering undissolved particles and impurities in the various mucilages obtained in the step (4), wherein the filtering is mainly used for enabling the obtained mucilages to be uniform and ensuring that the mucilage meets the requirements of coating.

6. Adding a m-methyl-white-cobalt system into the chloroprene mixed rubber cement in a weight ratio of 5:1, and uniformly stirring.

7. Coating, 5 layers of neoprene mixed rubber paste and 10 layers of butyl mixed rubber paste are coated on the front surface of the base fabric (the release fabric with the thickness of 0.15mm is adopted in the embodiment) from inside to outside in sequence.

Specifically;

firstly, chloroprene mixing mucilage is coated on the front side of the base fabric once, and a drying oven adopts continuous step type temperature rise, heating and drying to ensure that the solvent in the mucilage is volatilized as much as possible. This was repeated 5 times to complete the coating step of the chloroprene kneaded paste.

Secondly, coating the butyl mixing mucilage once, and heating and drying the baking oven by adopting continuous step-type heating to ensure that the solvent in the mucilage is volatilized as much as possible. This was repeated 10 times to complete the coating process of the butyl mastic.

In this example, the thickness of each single coating of the above-described cement layers was 0.02mm, and the coating process was performed in a coating apparatus, and each coating was performed by heating and drying in a continuous oven and cooling by a subsequent cooling roll, to thereby prepare a composite layer blank. It should be noted that the coating thickness of the coating apparatus during coating was 0.02mm at a time.

8. In the present embodiment, a drum vulcanizer is used to perform low-temperature hot pressing on the composite layer blank. The specific process is as follows:

cleaning the vulcanizing roller and the steel belt of the vulcanizing machine.

Secondly, setting vulcanization parameters, namely vulcanizing time of 3min, vulcanizing temperature of 90 ℃ and vulcanizing pressure of 27kg/cm 2. And flatly placing the composite layer blank into a drum vulcanizer to obtain the thermoplastic rubber fabric with neat appearance, uniform texture and good compactness.

Referring to fig. 1, the thermoplastic rubber fabric comprises a base fabric layer 1, a five-layer chloroprene mixed rubber cement layer 2 positioned on the base fabric, and ten layers of butyl mixed rubber cement layers 3 positioned outside the chloroprene mixed rubber cement layer 2, namely, the base fabric layer 1 is coated with the five layers of chloroprene mixed rubber cement layer 2 and the ten layers of butyl mixed rubber cement layers 3 in sequence. The thickness of the base fabric layer 1 is 0.15mm, and the thickness of each chloroprene mixed rubber cement layer 2 and each butyl mixed rubber cement layer 3 is 0.02mm, so that the thickness of the thermoplastic rubber fabric in the embodiment is only 0.45 mm. The flame retardancy and chemical testing of the product gave the following two tables:

table 1 shows the comparison between the test results and the standard values of the flame retardant property of the thermoplastic rubber fabric in the example one:

	standard index	Measured value
			Flame combustion time/s	≤10	≤5
Flameless combustion time/s	≤10	≤5
			Damaged length/cm	≤10	≤10

As can be seen from Table 1, the thermoplastic rubber fabric of this example has good flame retardant properties.

Table 2 shows the comparison of the measured results of the chemical permeability of the finished fabrics of the examples with the standard values

Chemical reagent	Test temperature	Mean penetration time (index)	Measured value
				Dimethyl sulfate salt	32℃±1℃	≥60min	≥120min
Ammonia gas	32℃±1℃	≥60min	≥120min
				Chlorine gas	32℃±1℃	≥60min	≥120min
Cyanochlorides	32℃±1℃	≥60min	≥120min
				Carbonyl chloride	32℃±1℃	≥60min	≥120min
Hydrogen cyanide compound	32℃±1℃	≥60min	≥120min

As can be seen from the table 2, the protective fabric has good chemical protection capability for not less than 60 minutes when being permeated by 6 main common toxic industrial chemicals.

In addition, the thermoplastic rubber fabric prepared by the invention is mainly used as a joint strip of the protective clothing, when in use, the thermoplastic rubber fabric is firstly cut into the joint strip with a certain width (generally 2 cm), and then the joint of the protective clothing is sewn by using a hot sewing machine, and simultaneously the thermoplastic joint strip work is completed. The pressure of the hot-seam machine is 0.3Mpa, the linear speed is 3 m/min, and the temperature is 250 ℃. The adhesive strength of the adhesive tape reaches 2.3KN/m through testing, and the problem of seam degumming is basically avoided.

Example two

The second embodiment is basically the same as the first embodiment, and the main difference is that in the second embodiment, the ratio of the compounding ingredients added to the two rubbers is slightly changed during the mixing process. The method comprises the following specific steps:

chloroprene rubber formula (parts by mass)

Butyl rubber formula (parts by mass)

Butyl rubber	100	Chlorinated paraffin	25
				Zinc oxide	4	Decabromodiphenylalkane	35
Stearic acid	0.5	TMTD	0.8
				Light calcium carbonate	15	TCY	1
Pigment yellow	1	Vultac#5	1
				Anti-aging agent 2246	1	Sulfur	1

The thermoplastic rubber fabric prepared in the second embodiment is basically the same as the thermoplastic rubber fabric prepared in the first embodiment, and although the individual performance parameters are slightly increased or decreased, the performance basically meets the industrial standard, but the comprehensive performance of the thermoplastic rubber fabric is slightly lower than that of the thermoplastic rubber fabric prepared in the first embodiment.

EXAMPLE III

The third embodiment is basically the same as the first embodiment, and the main difference is that in the third embodiment, the ratio of the added compounding agents is slightly changed during the mixing process of the two rubbers. The method comprises the following specific steps:

chloroprene rubber formula (parts by mass)

Neoprene	100	Chlorinated paraffin	25
				Stearic acid	1.2	Decabromodiphenylalkane	45
White carbon black	45	N-dodecyl mercaptan	2
				Pigment yellow	1.5	Accelerant NA-101	3
Anti-aging agent 4010NA	3	Zinc oxide	12
				Antiager TNP	1.5	Magnesium oxide	6

Butyl rubber formula (parts by mass)

The thermoplastic rubber fabric prepared in the third embodiment is basically the same as the thermoplastic rubber fabric prepared in the first embodiment, and although the individual performance parameters are slightly increased or decreased, the performance basically meets the industrial standard, but the comprehensive performance of the thermoplastic rubber fabric is slightly lower than that of the thermoplastic rubber fabric prepared in the first embodiment.

The present invention has been described in detail with reference to the embodiments, but the description is only for the preferred embodiments of the present invention and should not be construed as limiting the scope of the present invention. All equivalent changes and modifications made within the scope of the present invention shall fall within the scope of the present invention.