Oil-repellent microcapsule fabric

Abstract

The utility model relates to the technical field of oil-repellent textile fabrics, and provides an oil-repellent microcapsule fabric which comprises a fabric base layer and protective layers arranged on the upper surface and the lower surface of the fabric base layer, the fabric base layer is formed by interweaving warp yarns and weft yarns which are perpendicular to each other, and first oil-repellent microcapsules are arranged in the warp yarns and the weft yarns; a second oil-repellent microcapsule is arranged in the protective layer; the first oil-repellent microcapsule is composed of a water-resistant oil-repellent core material and a slow-release shell wrapping the outer side of the water-resistant oil-repellent core material; the second oil-repellent microcapsule is composed of an oil-permeation-resistant core material and a semi-permeable membrane wrapping the outer side of the oil-permeation-resistant core material. According to the oil-resistant fabric, the oil-resistant effect is remarkably improved, the oil-resistant period of the fabric is effectively prolonged, and marketization development is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of oil-repellent textile fabrics, in particular to an oil-repellent microcapsule fabric. Background Art

[0002] Microcapsule technology is a solid particle made by embedding and sealing solid, liquid or gaseous active substances in microcapsules by special methods, so that the active ingredients are isolated from the surrounding environment. The core of microcapsule preparation is the microencapsulation process, that is, the substance to be coated is first refined into a particle size and its tiny solid particles or droplets, and then with it as the core, a polymer with film-forming properties is deposited and coated on its surface by a special method to form a seamless film. The microcapsule structure can effectively reduce the reaction of its internal active substances to external environmental factors, reduce the diffusion and evaporation of the core material to the environment, can effectively control the release of the core material and mask the odor of the core material, and can also change certain physical or chemical properties of the core material, making the active core material more conducive to production and application. It is precisely because of the above advantages of microcapsules that microcapsule technology has developed rapidly in recent years and is widely used in many fields such as food, medicine, pesticides, textiles, daily chemicals, and construction.

[0003] Oil-repellent microcapsules are a kind of microcapsule finishing method that is currently used more, mainly used in the textile field, and it achieves the effect of oil repelling by reducing the surface energy of polyester fabric, which also marks the continuous development of textile products in the direction of high performance and multifunctionality. In the prior art, water-repellent and oil-repellent microcapsules are generally adhered or printed on the surface of textiles, such as the patent number CN207031689U "a kind of fragrant nonwoven material with water-repellent and oil-repellent function" discloses that the basic layer is a nonwoven material layer with irregularly shaped fragrance microcapsules or fragrance microcapsule aggregates adhered to the fiber surface, and the oil-repellent layer is a coating containing a water-repellent and oil-repellent agent, that is, the patent applies the oil-repellent layer to the fiber surface. For example, the patent number CN114232191A "a kind of anti-scald cool mosquito-repellent fabric and its preparation method" discloses that herbal mosquito-repellent microcapsules are printed on one side of the anti-scald layer by a round screen or flat screen printing method. It can be seen that although these methods can quickly adsorb / set microcapsules on the surface of fabrics, these composite methods only directly composite microcapsules on the surface of fabrics without any protection on the outside. Therefore, during repeated or violent use, microcapsules are easily detached, resulting in a decrease in the oil repellent effect of the fabric and shortening the service life of the functional fabric. It can be seen that the tightness of the combination of oil-repellent microcapsules and fabrics plays a vital role in the performance of their functions. Therefore, how to enhance the combination of oil-repellent microcapsules and fabrics has become the focus of current research.

[0004] To this end, based on the existing technology, the utility model creatively designs a first oil-repellent microcapsule filled in the fabric base layer and a second oil-repellent microcapsule filled in the protective layer, and designs the structure and size of the first oil-repellent microcapsule and the second oil-repellent microcapsule, thereby providing an oil-repellent microcapsule fabric, aiming to improve the oil-resistant effect and extend the service life of the oil-repellent functional fabric. Utility Model Content

[0005] The utility model aims to provide an oil-repellent microcapsule fabric with good and long-lasting oil-repellent effect, so as to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] An oil-repellent microcapsule fabric, comprising a fabric base and a protective layer arranged on the upper surface and the lower surface of the fabric base; the fabric base is formed by warp yarns and weft yarns that are perpendicular to each other and interwoven, and first oil-repellent microcapsules are arranged in the warp yarns and the weft yarns; and second oil-repellent microcapsules are arranged in the protective layer;

[0008] The first oil-repellent microcapsule is composed of a water- and oil-repellent core material and a sustained-release shell wrapped around the water- and oil-repellent core material;

[0009] The second oil-repellent microcapsule is composed of an oil-resistant permeation core material and a semipermeable membrane wrapped around the outer side of the oil-resistant permeation core material.

[0010] Preferably, the sustained-release shell of the first oil-repellent microcapsule is coated with a waterproof layer, and the thickness of the waterproof layer is 1-2 μm.

[0011] Preferably, the first oil-repellent microcapsules and the second oil-repellent microcapsules are spherical.

[0012] Preferably, the average particle size of the first oil-repellent microcapsules is 50-80 μm. Providing first oil-repellent microcapsules with larger particle sizes is conducive to accommodating a large amount of water- and oil-repellent core materials, thereby efficiently and durably exerting the oil-repellent effect.

[0013] Preferably, the thickness of the sustained-release shell in the first oil-repellent microcapsule is 5-8 μm.

[0014] Preferably, the average particle size of the second oil-repellent microcapsules is 3-12 μm. The second oil-repellent microcapsules with smaller particle sizes and their high filling rate can give priority to the oil-repellent effect while also having a certain sustained-release effect.

[0015] Preferably, the thickness of the semipermeable membrane in the second oil-repellent microcapsule is 0.5-0.8 μm. Setting a thinner semipermeable membrane thickness is conducive to reducing the external force that destroys the second oil-repellent microcapsule, so that the second oil-repellent microcapsule can play a role quickly and efficiently. The setting of the semipermeable membrane can also play a certain protective role for the second oil-repellent microcapsule that has not been put into use.

[0016] Compared with the prior art, the beneficial effects of the utility model are:

[0017] The utility model creatively designs a first oil-repellent microcapsule and a second oil-repellent microcapsule, and fills the first oil-repellent microcapsule into a fabric base layer to provide certain protection for the first oil-repellent microcapsule, and fills the second oil-repellent microcapsule into a protective layer on the fabric surface, so that the second oil-repellent microcapsule plays an oil-repellent role first; the arrangement of this structure not only gives full play to the sustained-release effect of the oil-repellent microcapsule to achieve a long-lasting oil-repellent effect, but also the combination of the first oil-repellent microcapsule and the second oil-repellent microcapsule enables the oil-repellent effects of the two to be performed alternately, thereby enhancing the oil-repellent effect and avoiding the failure of the oil-repellent core material due to premature exposure, thereby further extending the service life of the oil-repellent fabric. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the main structure of an oil-repellent microcapsule fabric of the utility model;

[0019] Figure 2 This is a schematic diagram of the main structure of the first oil-repellent microcapsule in the utility model;

[0020] Figure 3 This is a schematic diagram of the main structure of the second oil-repellent microcapsule in the utility model;

[0021] In the figure, 1-fabric base layer, 2-warp yarn, 3-weft yarn, 4-first oil-repellent microcapsule, 401-water-resistant and oil-repellent core material, 402-slow-release shell, 403-waterproof layer, 5-protective layer, 6-second oil-repellent microcapsule, 601-oil-resistant penetration core material, 602-semipermeable membrane. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figures 1 to 3 , the utility model provides: Specific embodiment 1

[0025] An oil-repellent microcapsule fabric comprises a fabric base 1 and a protective layer 5 arranged on the upper surface and the lower surface of the fabric base 1. The fabric base 1 is formed by warp yarns 2 and weft yarns 3 being perpendicular to each other and interwoven, and the warp yarns 2 and weft yarns 3 are respectively formed by a plurality of strands of yarns being wound around each other, and gaps are formed between the wound yarns, and the gaps formed by the warp yarns 2 when being wound and the gaps formed by the weft yarns 3 when being wound are used to fill the first oil-repellent microcapsules 4, so that the first oil-repellent microcapsules 4 are wrapped in the warp yarns 2 or the weft yarns 3, and the filling rates of the first oil-repellent microcapsules 4 in the warp yarns 2 and the weft yarns 3 are 30% and 50% respectively; the protective layer 5 (i.e., a porous protective layer, a polyurethane layer) is filled with second oil-repellent microcapsules 6, and its filling rate is 70%, that is, the second oil-repellent microcapsules 6 are filled in the pores of the porous protective layer.

[0026] The first oil-repellent microcapsule 4 in this embodiment 1 is spherical (see Figure 2 ), and its average particle size is 50μm; the first oil-repellent microcapsule 4 is composed of a water-repellent and oil-repellent core material 401 (i.e., an organic fluorine water-repellent and oil-repellent core material) and a sustained-release shell 402 (hydrophobic sustained-release shell) wrapped around the outside of the water-repellent and oil-repellent core material 401, and the thickness of the sustained-release shell is 5μm.

[0027] The second oil-repellent microcapsules 6 in this embodiment 1 are spherical (see Figure 3 ), and its average particle size is 3 μm; the second oil-repellent microcapsule 6 is composed of an oil-resistant penetration core material 601 (containing a water-repellent and oil-repellent agent of hydroxymethyl melamine derivatives and organic fluorine, which improves washability and water-repellency) and a semipermeable membrane 602 wrapped around the outside of the oil-resistant penetration core material 601, and the thickness of the semipermeable membrane is 0.5 μm. Specific embodiment 2

[0029] The oil-repellent microcapsule fabric in this embodiment 2 has the same structure as that in embodiment 1, except that: the filling rates of the first oil-repellent microcapsules 4 in the warp yarn 2 and the weft yarn 3 are 10% and 20% respectively; the filling rate of the second oil-repellent microcapsules 6 in the protective layer 5 is 30%; the average particle size of the first oil-repellent microcapsules 4 is 80 μm; the thickness of the sustained-release shell in the first oil-repellent microcapsules 4 is 8 μm; a waterproof layer 403 with a thickness of 2 μm is also coated on the outside of the sustained-release shell 402 of the first oil-repellent microcapsules 4; the average particle size of the second oil-repellent microcapsules 6 is 12 μm; the thickness of the semipermeable membrane in the second oil-repellent microcapsules 6 is 0.8 μm. Specific embodiment 3

[0031] The oil-repellent microcapsule fabric in this embodiment 3 has the same structure as that in embodiment 1, except that: the filling rates of the first oil-repellent microcapsules 4 in the warp yarn 2 and the weft yarn 3 are 20% and 30% respectively; the filling rate of the second oil-repellent microcapsules 6 in the protective layer 5 is 50%; the average particle size of the first oil-repellent microcapsules 4 is 60 μm; the thickness of the sustained-release shell in the first oil-repellent microcapsules 4 is 6 μm; the thickness of the waterproof layer 403 outside the sustained-release shell 402 is 1 μm; the average particle size of the second oil-repellent microcapsules 6 is 8 μm; the thickness of the semipermeable membrane in the second oil-repellent microcapsules 6 is 0.7 μm.

[0032] When the utility model is brand new and not in use, the protective layer on the surface of the oil-repellent microcapsule fabric is filled with second oil-repellent microcapsules, which are composed of an oil-resistant permeable core material and a semipermeable membrane wrapped around the outside of the oil-resistant permeable core material and have certain oil-resistant performance.

[0033] The utility model is first washed during use, and the second oil-repellent microcapsules filled in the protective layer are easy to enter the second oil-repellent microcapsules from the outside due to the semipermeable membrane structure (the protective layer is a porous water-absorbing protective layer) on the surface, and the oil-resistant permeable core material in the second oil-repellent microcapsules does not flow out; and because the semipermeable membrane is thin, a large amount of water enters the second oil-repellent microcapsules and causes the semipermeable membrane to burst, so that the second oil-repellent microcapsules on the surface of the fabric are broken, and the oil-resistant permeable core material inside it flows out, and penetrates into the warp yarn, weft yarn and gap of the fabric base layer, forming an oil-resistant layer, and playing an oil-resistant effect. With the use of fabric, its washing number increases, and the second oil-repellent microcapsules on the surface of the fabric will also be further broken due to rubbing and slapping, further forming an oil-resistant layer, and enhancing the oil-resistant effect.

[0034] With the long-term use and repeated cleaning of the fabric, the anti-oil layer formed by the rupture of the second oil-repellent microcapsule on its surface is gradually worn and thinned, and finally loses its anti-oil effect. At this time, the first oil-repellent microcapsules filled in the warp and weft yarns of the fabric base gradually play an oil-repellent effect due to the disappearance of the external protective layer, and the first oil-repellent microcapsules are composed of a water-resistant and oil-repellent core material and a slow-release shell wrapped in the outside of the water-resistant and oil-repellent core material, and the anti-oil slow-release effect is significant, further extending the anti-oil life of the fabric; and a waterproof layer is also coated outside the slow-release shell of the first oil-repellent microcapsule, and the first oil-repellent microcapsules are protected by the waterproof layer and the fabric base, significantly extending the anti-oil life of the veil, so as to play a lasting and efficient anti-oil effect.

[0035] It can be seen from the above embodiments of the present invention that the present invention designs a first oil-repellent microcapsule and a second oil-repellent microcapsule, and fills the first oil-repellent microcapsule in a fabric base layer to provide certain protection for the first oil-repellent microcapsule, and fills the second oil-repellent microcapsule in a protective layer on the fabric surface, so that the second oil-repellent microcapsule plays an oil-resistant role first; the arrangement of this structure not only gives full play to the sustained-release effect of the oil-repellent microcapsule to achieve a long-lasting oil-resistant effect, but also the combination of the first oil-repellent microcapsule and the second oil-repellent microcapsule makes the oil-resistant effects of the two alternate, thereby enhancing the oil-repellent effect and avoiding the failure of the oil-resistant core material due to premature exposure, thereby extending the service life of the oil-repellent fabric.

[0036] In addition, the utility model also designs the structure and size of the first oil-repellent microcapsule and the second oil-repellent microcapsule, wherein the first oil-repellent microcapsule with a larger particle size is provided, which is conducive to accommodating a large amount of water-resistant and oil-repellent core material, so as to efficiently and durably exert the oil-repellent effect; the second oil-repellent microcapsule with a smaller particle size and a high filling rate is provided, so that the second oil-repellent microcapsule has a certain sustained-release effect while giving priority to exerting the oil-repellent effect; and the thinner semipermeable membrane thickness is provided, which is conducive to reducing the external force that destroys the second oil-repellent microcapsule, so that the second oil-repellent microcapsule can quickly and efficiently exert its effect, and the provision of the semipermeable membrane can also play a certain protective role for the second oil-repellent microcapsule that has not been put into use.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An oil-repellent microcapsule fabric, characterized in that: It comprises a fabric base layer and a protective layer arranged on the upper surface and the lower surface of the fabric base layer; the fabric base layer is formed by warp yarns and weft yarns being perpendicular to each other and interwoven, and the warp yarns and weft yarns are both provided with first oil-repellent microcapsules; the protective layer is provided with second oil-repellent microcapsules; The first oil-repellent microcapsule is composed of a water- and oil-repellent core material and a sustained-release shell wrapped around the water- and oil-repellent core material; The second oil-repellent microcapsule is composed of an oil-resistant core material and a semipermeable membrane wrapped around the outside of the oil-resistant core material.

2. The oil-repellent microcapsule fabric according to claim 1, characterized in that: The sustained-release shell of the first oil-repellent microcapsule is coated with a waterproof layer, and the thickness of the waterproof layer is 1-2 μm.

3. The oil-repellent microcapsule fabric according to claim 1, characterized in that: The first oil-repellent microcapsules and the second oil-repellent microcapsules are spherical.

4. The oil-repellent microcapsule fabric according to claim 3, characterized in that: The average particle size of the first oil-repellent microcapsules is 50-80 μm.

5. The oil-repellent microcapsule fabric according to claim 4, characterized in that: The thickness of the sustained-release shell in the first oil-repellent microcapsule is 5-8 μm.

6. The oil-repellent microcapsule fabric according to claim 3, characterized in that: The average particle size of the second oil-repellent microcapsules is 3-12 μm.

7. The oil-repellent microcapsule fabric according to claim 6, characterized in that: The thickness of the semipermeable membrane in the second oil-repellent microcapsule is 0.5-0.8 μm.

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