阅读说明：本技术 一种抗菌防霉缝编布 (Antibiotic mould proof seam plaiting cloth ) 是由 傅陆军 傅天天 于 2021-08-12 设计创作，主要内容包括：本发明涉及一种抗菌防霉缝编布,以回收塑料原料进行前处理,得到可再生聚酯纤维后,对所述可再生聚酯纤维进行抗菌防霉改性处理和后处理,得到所述抗菌防霉缝编布。本发明以回收塑料原料进行前处理,得到可再生聚酯纤维,并基于所述可再生聚酯纤维进行抗菌防霉处理和后处理得到成品；本发明对纤维进行改性,获得更高的表面活性、更低的临界胶束浓度,最终得到的产品吸水性好,抗菌、防霉性能持久,化学纤维的粗细可控且这些纤维的抗菌防霉成分可以有效分布在整个缝编布中。(The invention relates to an antibacterial and mildewproof stitch-knitted fabric, which is prepared by carrying out pretreatment on a recycled plastic raw material to obtain renewable polyester fibers, and then carrying out antibacterial and mildewproof modification treatment and aftertreatment on the renewable polyester fibers. The method comprises the steps of carrying out pretreatment on a recycled plastic raw material to obtain renewable polyester fibers, and carrying out antibacterial and mildewproof treatment and aftertreatment on the basis of the renewable polyester fibers to obtain a finished product; the invention modifies the fiber to obtain higher surface activity and lower critical micelle concentration, the finally obtained product has good water absorption, durable antibacterial and mildew-proof performance, the thickness of the chemical fiber is controllable, and the antibacterial and mildew-proof components of the fiber can be effectively distributed in the whole stitch-knitted cloth.)

1. The utility model provides an antibiotic mould proof seam plaiting which characterized in that: the method comprises the steps of carrying out pretreatment on a recycled plastic raw material to obtain renewable polyester fibers, and carrying out antibacterial and mildewproof modification treatment and aftertreatment on the renewable polyester fibers to obtain the antibacterial and mildewproof stitch-knitted fabric.

2. The antibacterial and mildewproof stitch-bonded fabric according to claim 1, which is characterized in that: the pretreatment comprises sorting, cleaning, crushing and alcoholysis of the recycled plastic raw materials to obtain the renewable polyester fiber.

3. The antibacterial and mildewproof stitch-bonded fabric according to claim 1 or 2, which is characterized in that: the recycled plastic raw material is a PET plastic raw material.

4. The antibacterial and mildewproof stitch-bonded fabric according to claim 2, which is characterized in that: and the alcoholysis is to place the sorted, cleaned and crushed PET plastic in a solvent, and carry out alcoholysis at a preset temperature to obtain the renewable polyester fiber comprising long fibers and short fibers.

5. The antibacterial and mildewproof stitch-bonded fabric according to claim 4, wherein the antibacterial and mildewproof stitch-bonded fabric comprises the following components in percentage by weight: the solvent is polyester-grade glycol, and the concentration is more than or equal to 99.9%.

6. The antibacterial and mildewproof stitch-bonded fabric according to claim 4, wherein the antibacterial and mildewproof stitch-bonded fabric comprises the following components in percentage by weight: the preset temperature is 170-210 ℃.

7. The antibacterial and mildewproof stitch-bonded fabric according to claim 1, which is characterized in that: the antibacterial and mildewproof modification treatment comprises the steps of coupling the antibacterial agent with the surfactant, compounding the mildewproof agent and reacting with the renewable polyester fiber.

8. The antibacterial and mildewproof stitch-bonded fabric according to claim 7, which is characterized in that: the surfactant comprises a connecting group, wherein two ends of the connecting group are respectively provided with 2 hydrophilic groups and 2 hydrophobic hydrocarbon chains.

9. The antibacterial and mildewproof stitch-bonded fabric according to claim 7, which is characterized in that: the antibacterial agent contains one or more of quaternary ammonium salt, quaternary phosphonium salt or silver ions, and the mildew preventive comprises a compound mildew preventive with an effective component of N-octyl isothiazolinone, and the molecular formula of the compound mildew preventive is C₄H₄NSO。

10. The antibacterial and mildewproof stitch-bonded fabric according to claim 1, which is characterized in that: the post-treatment is to open, lay a net, finish, prick and stitch the fiber after the antibacterial and mildewproof treatment according to a preset specification.

Technical Field

The invention relates to the technical field of manufacturing textiles, such as fiber or filament raw materials, in particular to an antibacterial and mildewproof stitch-knitted fabric.

Background

The stitch-knitted fabric is one kind of dry non-woven fabric, and is produced through selecting high quality plastic bottle sheet, processing to form chemical fiber as recovered material, and stitch-knitting with 80-95% of polyester staple fiber and 5-20% of polyester filament warp-knitted loop structure to reinforce the fiber web, yarn layer and non-woven material combination including plastic sheet, plastic foil, etc. to produce the non-woven fabric with re-circulated plastic.

In the prior art, the recycled plastic serving as a raw material of the stitch-bonded fabric is not subjected to reasonable antibacterial and mildewproof treatment, and meanwhile, the raw material is often processed to have disadvantages, so that the thickness of fibers cannot be well controlled in the process of processing the raw material into the stitch-bonded fabric, the stitch-bonded fabric cannot maintain good antibacterial property and prevent mildew in the subsequent storage process, and the surface of the stitch-bonded fabric has projections and depressions, so that the fabric surface is uneven, and a proper environment is further created for bacterial breeding.

Disclosure of Invention

The invention solves the problems in the prior art and provides the optimized antibacterial and mildewproof stitch-bonded fabric.

The technical scheme adopted by the invention is that the antibacterial and mildewproof stitch-knitted fabric is obtained by performing pretreatment on a recycled plastic raw material to obtain renewable polyester fibers, and then performing antibacterial and mildewproof modification treatment and post-treatment on the renewable polyester fibers.

Preferably, the pretreatment comprises sorting, cleaning, crushing and alcoholysis of the recycled plastic raw material to obtain the renewable polyester fiber.

Preferably, the recycled plastic feedstock is a PET plastic feedstock.

Preferably, the alcoholysis is carried out by placing the sorted, cleaned and crushed PET plastic in a solvent and carrying out alcoholysis at a preset temperature to obtain the renewable polyester fiber comprising long fibers and short fibers.

Preferably, the solvent is polyester grade glycol, and the concentration is more than or equal to 99.9%.

Preferably, the preset temperature is 170-210 ℃.

Preferably, the antibacterial and mildewproof modification treatment comprises the steps of coupling the antibacterial agent with the surfactant, compounding the mildewproof agent, and reacting with the renewable polyester fiber.

Preferably, the surfactant comprises a linking group, and the two ends of the linking group are respectively provided with 2 hydrophilic groups and 2 hydrophobic hydrocarbon chains.

Preferably, the antibacterial agent contains one or more of quaternary ammonium salt, quaternary phosphonium salt or silver ion, and the mildew preventive comprises a compound mildew preventive with an effective component of N-octyl isothiazolinone, and the molecular formula of the compound mildew preventive is C₄H₄NSO(ii) a Precisely, the antimicrobial agent has a cation.

Preferably, the post-treatment is opening, lapping, finishing, needling and stitch-bonding the fiber subjected to the antibacterial and mildewproof treatment according to a preset specification.

The invention relates to an optimized antibacterial and mildewproof stitch-knitted fabric, which is prepared by carrying out pretreatment on a recycled plastic raw material to obtain renewable polyester fibers, and carrying out antibacterial and mildewproof treatment and aftertreatment on the basis of the renewable polyester fibers to obtain a finished product.

The invention modifies the fiber to obtain higher surface activity and lower critical micelle concentration, the finally obtained product has good water absorption, durable antibacterial and mildew-proof performance, the thickness of the chemical fiber is controllable, and the antibacterial and mildew-proof components of the fiber can be effectively distributed in the whole stitch-knitted cloth.

Detailed Description

The present invention is described in further detail with reference to the following examples, but the scope of the present invention is not limited thereto.

The invention relates to an antibacterial and mildewproof stitch-knitted fabric, which is prepared by carrying out pretreatment on a recycled plastic raw material to obtain renewable polyester fibers, and then carrying out antibacterial and mildewproof modification treatment and aftertreatment on the renewable polyester fibers.

The recycled plastic raw material is a PET plastic raw material.

In the invention, the PET plastic raw material can be a PET recycling bottle generally, and can be prepared into renewable polyester fibers with good water absorption, including long fibers and short fibers after pretreatment.

The pretreatment comprises sorting, cleaning, crushing and alcoholysis of the recycled plastic raw materials to obtain the renewable polyester fiber.

According to the invention, recycled plastic raw materials such as PET plastic bottles are subjected to label removal by a label removing machine, then impurity color bottles such as green bottles, blue bottles, residual impurities and the like in the materials are selected by a plane sorting conveyor, other PET plastic bottles with the impurity color bottles removed are crushed in a crusher, then separated by a rinsing water tank, PET bottle pieces are separated from PP label paper and bottle caps, the separated PET bottle pieces are put into a high-temperature pot for heating and cleaning after being completely separated, then the PET bottle pieces are rinsed in the rinsing water tank, a cleaning agent in high-temperature heating is removed, and then the PET bottle pieces are directly packaged after being dehydrated in a dehydrator; overall, the process flow comprises: unpacking, scattering, pre-washing, label stripping, sorting, wet crushing, cleaning, flotation, rinsing, dehydrating, drying, dry crushing, storing and warehousing; and aiming at the conditions of high yield and high grade of bottle flakes, the whole bottle can be treated by a whole set of fine washing links such as a whole bottle prewashing link, a label removing and sorting link, a primary crushing link, a primary washing and separating link, a high-temperature washing link, a neutralization washing link, a rinsing and drying link, a bottle flake selecting link and the like. This is a matter that is easily understood by those skilled in the art, and those skilled in the art can set up and process the plastic material by themselves.

According to the invention, an implementation mode is provided, each procedure in the cleaning process is provided with a separate water circulation device, and the cleaning process adopts continuous, automatic and modular design to ensure the product quality; adopting automatic sorting equipment to sort the bottles by near infrared spectrum analysis and a high-speed CCD camera to remove non-PET bottles and variegated bottles; the preferred bottles are cut into pieces of about 5cm by using a high efficiency shredder.

And the alcoholysis is to place the sorted, cleaned and crushed PET plastic in a solvent, and carry out alcoholysis at a preset temperature to obtain the renewable polyester fiber comprising long fibers and short fibers.

The solvent is polyester-grade glycol, and the concentration is more than or equal to 99.9%.

The preset temperature is 170-210 ℃.

In the invention, alcoholysis utilizes the hydroxyl of alcohol to alcoholyze certain polymers and recycle raw materials, and is suitable for plastics; the reaction formula of alcoholysis is:

formula (1)

Formula (2)

Formula (3)

In the invention, glycolysis of PET can degrade long PET chains into short chains with hydroxyethyl end groups, wherein x is the average number of PET repeating units, and y is the average number of product repeating units; the main side reaction of PET and ethylene glycol is carried out under the catalysis of acid, and the side reaction is reduced by adding buffer solution into the reaction system, so that the yield of effective substances in the alcoholysis process is greatly improved.

The antibacterial and mildewproof modification treatment comprises the steps of coupling the antibacterial agent with the surfactant, compounding the mildewproof agent and reacting with the renewable polyester fiber.

The surfactant comprises a connecting group, wherein two ends of the connecting group are respectively provided with 2 hydrophilic groups and 2 hydrophobic hydrocarbon chains, namely the gemini surfactant.

The antibacterial agent contains cation, such as quaternary ammonium salt or quaternary phosphonium salt or one or more of silver ions, and the mildew preventive comprises a compound mildew preventive with N-octyl isothiazolinone as an effective component, and the molecular formula of the compound mildew preventive is C₄H₄NSO。

According to the invention, the chemical fiber long fibers and short fibers which are prepared through alcoholysis and have good hydrophilicity are introduced with the gemini surfactant, so that the antibacterial agent and the mildew preventive compounded by the renewable polyester fibers can be better attached to the chemical fiber long fibers and the chemical fiber short fibers, the antibacterial property and the mildew preventive are durable, and the antibacterial and mildew preventive effects are not easy to lose due to washing.

In the invention, the gemini surfactant is a compound which is provided with 2 hydrophilic groups and 2 hydrophobic hydrocarbon chains and is connected through a connecting group, and can be regarded as two common surfactants which are connected together through a bridge, the connecting group in a surfactant molecule connects two hydrophilic groups through a chemical bond, so that the electrostatic repulsion between the hydrophilic groups is weakened, the introduced cationic antibacterial agent forms a cationic surface, and the whole molecule combines two gemini parents through the hydrophilic groups or the connecting group close to the hydrophilic groups.

In the invention, the gemini surfactant molecule contains two hydrophobic chains, the hydrophobicity is strong, the linking group connects the two hydrophilic groups through chemical bonds, the electrostatic repulsion between the hydrophilic groups and the repulsion between hydration layers are weakened, the adsorption of the surfactant molecule on the surface of an aqueous solution and the self-polymerization of the surfactant molecule in the aqueous solution are promoted, the quaternary ammonium salt group (or other cationic groups) of the antibacterial part has strong water absorption and is connected with the end of the hydrophobic chain, so that the gemini surfactant has high surface adsorption capacity and aggregate forming capacity; the mildew-proof is compounded with the antibacterial series.

In the invention, a gemini surfactant is coupled with an antibacterial agent containing cations, quaternary ammonium salt or quaternary phosphonium salt or silver ions, and is compounded with a mildew preventive including but not limited to N-octyl isothiazolinone and the like to modify renewable polyester fibers, so that the antibacterial and mildew-proof chemical fibers with higher surface activity and lower critical micelle concentration and controllable thickness are obtained.

According to the invention, the antibacterial agent is compounded with the mildew preventive by means of high molecular emulsion polymerization, and has good inhibition effects on gram-positive bacteria represented by staphylococcus aureus, gram-negative bacteria represented by klebsiella pneumoniae, fungi represented by trichophyton rubrum, mold represented by aspergillus flavus and the like; meanwhile, the fiber subjected to antibacterial and mildew-proof modification can be uniformly mixed with other common chemical fibers in the lapping and carding processes, and the antibacterial and mildew-proof fiber is dispersed in the whole stitch-bonded cloth through a stitch-bonding process.

The post-treatment is to open, lay a net, finish, prick and stitch the fiber after the antibacterial and mildewproof treatment according to a preset specification.

In the invention, the preparation method of the stitch-knitted fabric comprises the following steps:

s1, taking the recycled plastic raw material back for pretreatment to obtain renewable polyester fiber; the pretreatment comprises sorting, cleaning, crushing and alcoholysis;

s2, carrying out antibacterial and mildewproof modification treatment on the renewable polyester fiber;

s3, carrying out post-treatment on the modified polyester fiber of S2 to obtain the antibacterial and mildewproof stitch-bonded fabric; the post-treatment comprises opening, lapping, finishing, needling and stitch-bonding according to a preset specification; wherein, opening, lapping, finishing, needling and stitch bonding are conventional technologies in the field, and the technical personnel in the field can set the technology according to the requirements.

Example 1

After antibacterial and mildewproof finishing, weighing 15 kg of renewable polyester fibers with the diameter of 2.5D, opening, lapping, finishing, needling and stitch-bonding the renewable polyester fibers with other untreated renewable fibers of 85 kg of 1.8D and 2.5D to form cloth, and detecting the antibacterial performance of the renewable polyester fibers by using a method specified in QB/T2881-2013 standard to obtain the antibacterial performance test results shown in Table 1;

TABLE 1 results of antibacterial testing

Antibacterial test strain	Antibacterial rate of the sample before washing%	Antibacterial rate% after sample washing 50 times
			Staphylococcus aureus	99.5	99.2
Klebsiella pneumoniae	99.9	99.7
			Candida albicans	99.5	99.0
Trichophyton rubrum	99.6	99.4

The mildew-proof test and performance evaluation standard adopts GB/T24346-2009, and the mildew-proof test performance is shown in Table 2;

TABLE 2 mildew resistance test

Experiments show that the product of the invention has good and lasting antibacterial and mildew-proof performance.