Manufacturing method of single-layer graphene oxide functional thermal waddingTechnical Field
The invention relates to the technical field of textile materials, in particular to a manufacturing method of a single-layer graphene oxide functional thermal insulation flocculus.
Background
The wadding is used as a chemical fiber thermal insulation filling material for mainstream textile clothing, and is directly formed by loose fibers. The mainly used differential fiber varieties comprise three-dimensional crimped fibers, hollow fibers, superfine fibers and the like, wherein 1) the superfine fiber flocculus can form a porous and compact structure, a fine network and a tiny space are formed in the flocculus while static air is stored, radiation and heat dissipation of a human body and convection and heat conduction in the flocculus are effectively shielded, and 3) the three-dimensional crimped fibers are commonly used fiber materials with spiral appearance in the flocculus, and a relatively large space can be formed in the flocculus by using the fibers, so that the fluffiness of the flocculus is enhanced. 3) Hollow super thermal fibers of Thermolite were developed by dupont in the united states simulating the hollow structure of north pole Xiong Mao. Du Bangmian the hollow fiber is used for increasing the content of static air in the flocculus through the internal pores of the fiber, thereby enhancing the heat preservation performance of the flocculus.
However, the differential fiber has corresponding functions and corresponding disadvantages. For example, the use of a large proportion of the microfibers in the batt tends to cause entanglement between the microfibers during carding, and defects in the batt.
The various functional fibers and the differential fibers have functions, and the use of single-specification fibers cannot lead the flocculus to reach the optimal state, so the matching design of the various fibers to integrate various functions is a design trend of novel flocculus. For example, yang Yidan in the article "development of multi-component functional thermal nonwoven materials" mentions the use of far infrared hollow polyester fibers in combination with cashmere and kapok fibers, which exploit the characteristics of the crimp, finer morphology and highly hollow kapok of the cashmere fibers, and the formation of multi-component high performance batts. The raw materials such as cashmere, kapok, far infrared fibers and the like are used in the flocculus, so that the flocculus is striven for integrating the advantages of several materials. For example, the addition of far infrared fibers will provide the flakes with a far infrared emitting function.
The far infrared functional component in the far infrared functional fiber can effectively absorb and emit energy in the far infrared band. The far infrared absorption function of the fiber can make the flocculus block heat from human body to radiate to external environment in the form of far infrared radiation through the flocculus, thereby playing a role in keeping warm, and meanwhile, the far infrared generation function of the fiber can make the flocculus emit far infrared energy to human body, thereby playing a role in keeping warm and protecting health for human body.
However, the use of far infrared fibers in the existing far infrared flakes is insufficient. For example, 20% of single-specification far infrared fibers with the length of 64 mm and the fineness of 3.33 dtex are added into the wadding in the first text of development of multi-component functional thermal insulation nonwoven materials, and then in the last years, the far infrared fibers or the far infrared materials are used as one layer of the multi-layer composite wadding in patents such as thermal insulation cotton with far infrared heating function, far infrared thermal insulation flame retardant function wadding and preparation method thereof, porous light-weight glue spraying cotton and the like. The use modes similar to the simple addition or single-layer compounding cannot better play the warm-keeping function of the far infrared fibers, because the modes cannot effectively play the function of preventing radiation and heat dissipation in the flocculus.
The functional components of the common far infrared functional fiber are metal or nonmetal oxide ceramic particles contained therein. Compared with far infrared fibers such as common infrared functional fibers, the single-layer graphene oxide composite fiber has the advantages that far infrared emission and absorption wave bands of the single-layer graphene oxide material in the composite fiber are overlapped with the far infrared emission wave bands of a human body, and the single-layer graphene oxide composite fiber is used for textile clothing articles and can effectively play roles in preventing far infrared radiation and far infrared health care.
In summary, the current popular multi-component flocculus has two defects, namely 1) the phenomenon of ultrafine fiber entanglement is usually generated, because the specific surface area is relatively large, and a plurality of contact points exist between the two, so that when the addition amount of the ultrafine fibers is large, the ultrafine fibers are difficult to comb or entangle again, the thermal insulation function is weakened, and 2) the far infrared functional fiber is used in a manner of only playing the far infrared emission function, and the thermal insulation function of preventing radiation and heat dissipation cannot be effectively played. In view of the above problems, a solution is proposed below.
Disclosure of Invention
The invention aims to provide a manufacturing method of a single-layer graphene oxide functional thermal insulation flocculus, which has the advantages of solving the problem that ultrafine fiber embracing entanglement phenomenon occurs in multi-component fibers, innovatively using far infrared fibers and enabling the far infrared fibers to better play a thermal insulation role.
The technical aim of the invention is realized by the following technical scheme:
a method for manufacturing a single-layer graphene oxide functional thermal wadding, which comprises the following steps,
S1, preparing raw materials, wherein the raw materials comprise superfine filling fibers, fine denier filling fibers A, fine denier filling fibers B, medium and large support filling fibers A, medium and large support filling fibers B, large denier support fibers and low-melting-point bonding fibers;
S2, feeding the raw materials into a mixer for opening and premixing to obtain a primarily opened and primarily mixed fiber mixture;
s3, feeding the premixed fibers into a fine opener, and further opening and fully mixing the fibers in the fine opener;
s4, feeding the fully mixed fiber aggregate into a carding machine for carding, wherein the carding machine cards the fiber aggregate into a thin-layer fiber web;
s5, a plurality of thin layer webs are crossly paved to form a paved state, and the number of the thin layer webs in the paved state is 2-8;
S6, carrying out a reinforcing process on the laminated thin-layer fiber webs, wherein the reinforcing process comprises spraying a chemical adhesive and drying, the chemical adhesive is used for bonding the thin-layer fiber webs, the drying process is carried out in a drying oven, the drying temperature is 110-130 ℃, the drying time is 3-8min, and the finished flocculus is obtained, and the gram weight of the finished flocculus is 80-300g;
And S7, cutting and winding the finished flocculus to obtain the coiled flocculus.
Preferably, the superfine filling fiber is a polyester fiber, the superfine filling fiber is a round section, the fine denier filling fiber A is a graphene polyester fiber, the fine denier filling fiber A is a round hollow section, the fine denier filling fiber B is a graphene polyester fiber, the fine denier filling fiber B is a round hollow section, the medium coarse support filling fiber A is a graphene polyester fiber, the medium coarse support filling fiber A is a round hollow section, the medium coarse support filling fiber is a three-dimensional curl, the medium coarse support filling fiber B is a polyester fiber, the medium coarse support filling fiber B is a round hollow section, the medium coarse support filling fiber is a three-dimensional curl, the coarse denier supporting fiber is a polyester fiber, the coarse denier supporting fiber is a round hollow section, the coarse denier supporting fiber is a three-dimensional curl, the low-melting-point bonding fiber is an ES fiber, the low-melting-point bonding fiber is a round section, and the low-melting-point bonding fiber is a sheath-core structure.
Preferably, the proportion of the superfine filling fiber, the fine denier filling fiber A, the fine denier filling fiber B, the middle coarse support filling fiber A, the middle coarse support filling fiber B, the coarse denier support fiber and the low-melting point bonding fiber is 10% -20%, 10% -15%, 10% -20%.
Preferably, the fineness of the superfine filling fiber ranges from 0.5 to 1D, and the length of the superfine filling fiber ranges from 38mm to 51mm.
Preferably, the fineness of the fine denier filling fiber A ranges from 1D to 1.5D, the length of the fine denier filling fiber A ranges from 38mm to 51mm, the fineness of the fine denier filling fiber B ranges from 1D to 1.5D, and the length of the fine denier filling fiber B ranges from 38mm to 51mm.
Preferably, the fineness range of the middle coarse support filling fiber A is 2D-5D, the length range of the middle coarse support filling fiber A is 51mm-64mm, the fineness range of the middle coarse support filling fiber B is 2D-5D, and the length range of the middle coarse support filling fiber B is 51mm-64mm.
Preferably, the fineness of the coarse denier support fiber ranges from 5D to 7D, and the length of the coarse denier support fiber ranges from 51mm to 64mm.
Preferably, the fineness of the low-melting-point bonding fiber ranges from 2D to 5D, and the length of the low-melting-point bonding fiber ranges from 38mm to 64mm.
Preferably, the thermal wadding is used for filling quilts, clothes and sleeping bags.
The beneficial effects of the invention are as follows:
1. By using a large amount of 1D-1.5D fine denier fibers, the occurrence of tight flock between the ultra fine fibers is reduced compared with conventional flakes. The thermal insulation performance of the flocculus is enhanced;
2. the 1D-1.5D fine denier graphene fibers account for 30% of the floccules, and the 3D medium coarse graphene fibers account for 50% of the total graphene fibers, so that the graphene fibers are uniformly and densely distributed in the floccules, radiation heat transfer in the floccules can be effectively slowed down, and the thermal insulation performance of the floccules is improved.
Detailed Description
The following description is only of the preferred embodiments of the present invention, and the scope of the present invention should not be limited to the examples, but should be construed as falling within the scope of the present invention.
A single-layer graphene oxide functional thermal insulating flocculus with the gram weight of 80g/m < 2> (note: in the design, the flocculus with lower gram weight is thinner, and thicker raw materials tend to be selected for ensuring the bulk degree, so that 70% of fibers have the fineness of more than 1.5D).
1. Weighing the following raw materials in proportion:
1) Superfine filling fiber, namely 0.7D51mm polyester fiber, with round section and 10 percent;
2) 1.2D51mm graphene polyester fiber, a round hollow section and a ratio of 10%;
3) 1.5D51mm graphene polyester fiber, a round hollow section and a ratio of 10%;
4) 3.0D64mm graphene polyester fiber, a round hollow section and three-dimensional curling, wherein the proportion of the medium-coarse support filling fiber is 15%;
5) Middle coarse support filling fiber, 5.0D64mm polyester fiber, round hollow section, three-dimensional crimp, accounting for 20%;
6) 7.0D64mm polyester fiber, round hollow section, three-dimensional crimp, accounting for 15%;
7) 4.0D64mm ES fiber, circular cross section, sheath-core structure, accounting for 20%;
2. Process steps
1) After weighing the raw materials, the raw materials are sent into a mixer for opening and premixing to obtain a fiber mixture which is preliminarily opened and preliminarily mixed.
2) The pre-mixed fibers are fed into a finish opener where the fibers are further opened and thoroughly mixed.
3) After thorough mixing, the various specifications of fibers in the fiber collection are already in a substantially uniform distribution, and the fibers are fed through a feeder to a carding machine.
4) The carding process is completed by 2 single cylinder double doffers carding machines, the carding machines card the fiber aggregate into thin layer fiber web, and the output fiber fixed weight is 40g/m2. The fibers in the web are carded into well dispersed individual fibers and further uniformly mixed for subsequent layering.
5) The 2 layers of webs are cross-plied to form a plied state. And (5) entering a reinforcing procedure.
In the reinforcing process, the flakes are sprayed with a chemical binder by a spraying machine in an amount of 2g/m2. Through the drying effect of the oven, the chemical fiber adhesive and the low-melting point fiber bonding fibers form bonding among the fibers in the flocculus, and the flocculus forms a certain strength and a fixed form. The drying temperature of the oven is 110 ℃ and the drying time is 3min.
The gram weight of the formed flakes was 80g/m2.
3. Test effect
The thermal insulation performance of the insulating flocculus is tested by using GB/T11048-2008, and the test result shows that the Crohn value of the 80g single-layer graphene oxide insulating flocculus reaches 1.9clo, and the common 80g insulating flocculus only has 1.4clo, so that the thermal insulation performance of the single-layer graphene oxide insulating flocculus is far higher than that of the conventional flocculus.
Single-layer graphene oxide functional thermal insulating flocculus with the gram weight of 300g/m2 (because the high gram weight flocculus is easy to have too high thickness, finer fiber raw materials tend to be selected in design, and the 60% fiber fineness is not more than 1.5D).
1. Weighing the following raw materials in proportion:
1) Superfine filling fiber, namely 0.5D51mm polyester fiber, round section and accounting for 20 percent;
2) 1.0D51mm graphene polyester fiber, round hollow section and 20% of fine denier filling fiber;
3) 1.2D51mm graphene polyester fiber, a round hollow section and a proportion of 20%;
4) 2.0D64mm graphene polyester fiber, a round hollow section and three-dimensional curling, wherein the ratio of the middle-coarse support filling fiber to the three-dimensional curling is 10%;
5) Middle coarse support filling fiber, 3.0D64mm polyester fiber, round hollow section, three-dimensional crimp, accounting for 10%;
6) Coarse denier support fiber, 5.0D64mm polyester fiber, round hollow section, three-dimensional crimp, accounting for 10%;
7) 2.0D64mm ES fiber, circular cross section, sheath-core structure, accounting for 10%;
2. Process steps
1) After weighing the raw materials, the raw materials are sent into a mixer for opening and premixing to obtain a fiber mixture which is preliminarily opened and preliminarily mixed.
2) The pre-mixed fibers are fed into a finish opener where the fibers are further opened and thoroughly mixed.
3) After thorough mixing, the various specifications of fibers in the fiber collection are already in a substantially uniform distribution, and the fibers are fed through a feeder to a carding machine.
4) The carding process is completed by 5 single cylinder double doffers carding machines, the carding machines card the fiber aggregate into thin layer fiber web, and the output fiber fixed weight is 60g/m2. The fibers in the web are carded into well dispersed individual fibers and further uniformly mixed for subsequent layering.
5) The 5 layers of webs are cross-plied to form a plied state. And (5) entering a reinforcing procedure.
In the reinforcing process, the flakes were sprayed with a chemical binder by a spray coater in an amount of 6g/m2. Through the drying effect of the oven, the chemical fiber adhesive and the low-melting point fiber bonding fibers form bonding among the fibers in the flocculus, and the flocculus forms a certain strength and a fixed form. The drying temperature of the oven is 130 ℃ and the drying time is 8min.
The gram weight of the formed flakes was 300g/m2.
3. Test effect
The thermal insulation performance of the insulating flocculus is tested by using GB/T11048-2008, and the test result shows that the Crohn value of 300g single-layer graphene oxide insulating flocculus reaches 5.3clo, while the common 300g insulating flocculus only has 4.1clo, and the thermal insulation performance of the single-layer graphene oxide insulating flocculus is far higher than that of the conventional flocculus.
The working principle is that the 3D-6D thick denier three-dimensional curled hollow fiber accounts for 40 percent, the larger void structure in the flocculus is supported, and if 1D-1.5D fine denier fiber is not added in a large amount, the superfine fiber which accounts for higher proportion can generate entanglement and holding mass due to close contact and hooking. Therefore, in the formula design, 30% of fine denier fibers with the fineness of 1D-1.5D are added, compared with 3D or 6D fibers, the specific surface area inside the flocculus can be effectively increased, the fibers are fully contacted and hooked with 0.7D ultrafine fibers, and meanwhile, tiny gaps are formed, so that the interval between the ultrafine fibers is increased, and the self-entanglement of the ultrafine fibers is remarkably reduced. In this way, the superfine fibers are fully dispersed and uniformly distributed in the flocculus, each layer of fiber net is fine and uniform, and uniform and fine gaps are formed in the flocculus. In addition, the fine fiber net absorbs and reflects heat radiation in the flocculus, can better block radiation heat transfer in the flocculus, and increases the thermal insulation performance of the flocculus compared with the flocculus.
Inside the batt, heat is transferred from the inside of the high temperature to the outside of the relatively low temperature by means of far infrared radiation. The graphene fiber can effectively absorb far infrared radiation, and is uniformly distributed in the flocculus together with the common polyester fiber. The flocculus comprises a plurality of graphene fibers with fineness specifications including 1.2D, 1.5D and 3D, so that the graphene fibers are uniformly, finely and widely distributed in the fiber net, and compared with other flocculus added with far infrared fibers with single specification or added with graphene components in a single-layer composite mode, the graphene functional thermal insulation flocculus can form high-efficiency absorption of heat radiation at all positions inside, thereby obviously slowing down radiation heat transfer occurring inside the flocculus.
The wadding of the product can be used for filling warm-keeping products such as quilts, clothes, sleeping bags and the like. Besides warm keeping, the product has the main functions of far infrared health care, anion generation, antibiosis, mite prevention and the like.
The technical problems, technical solutions and advantageous effects solved by the present invention have been further described in detail in the above-described embodiments, and it should be understood that the above-described embodiments are only illustrative of the present invention and are not intended to limit the present invention, and any modifications, equivalent substitutions, improvements, etc. within the spirit and principle of the present invention should be included in the scope of protection of the present invention.