A non-woven fabric and its preparation method and application

Abstract

The present application relates to the field of non-woven fabrics, and more specifically to a non-woven fabric and a preparation method and application thereof. The present invention provides a composition comprising the following components: an imidazoline compound, polyethylene glycol, a quaternary ammonium salt, a polyether compound and grease. The composition is a fiber finishing agent for preparing a non-woven fabric. The obtained non-woven fabric looks like a silk texture and feels silky and soft to the touch.

Description

Technical Field

[0001] The present application relates to the field of nonwoven fabrics, and more specifically to a nonwoven fabric and a preparation method and application thereof. Background Art

[0002] The soft wipes currently on the market include soft wipes made of cotton fibers (cotton soft wipes), soft wipes made of viscose fibers (also called viscose fibers, which are made by extracting and removing hemicellulose from wood pulp. They are plant fibers, 100% degradable, and environmentally friendly. Commonly known as "artificial cotton"), soft wipes made of any proportion of viscose fibers and polyester fibers (petroleum-based), or soft wipes composed of polyester fibers.

[0003] In 2021, Kimberly-Clark launched a soft towel containing mulberry silk fiber, mainly as its face towel product. The polyester fiber reaches 30%, the viscose fiber is about 69%, and the mulberry silk fiber is less than 0.8%.

[0004] These products will become hard, hardened, and rough when used for cleansing, makeup removal, baby wipes, or regular disposable face washcloths. If they contain polyester fibers, they will also cause non-degradable environmental pollution. If all-viscose non-woven fabrics are soaked in hot water, they will also have a strong "sulfur smell".

[0005] With the improvement of the living standards of mass consumers, the demand for higher product quality, the increase in environmental awareness and the love for environmental friendliness, technical personnel in this field hope to develop better soft towel products that are ultra-soft, thick, odorless, non-pilling, and easily biodegradable. Summary of the invention

[0006] In some embodiments, the present invention provides a composition comprising the following components: an imidazoline compound, polyethylene glycol, a quaternary ammonium salt, a polyether compound and oil.

[0007] In some embodiments, the composition comprises the following components in parts by weight: 0.05-5 parts of an imidazoline compound, 0.01-2 parts of polyethylene glycol, 0.05-2 parts of a quaternary ammonium salt, 0.05-5 parts of a polyether compound, and 0.05-5 parts of oil.

[0008] In some embodiments, the composition comprises the following components in parts by weight: 0.1 to 5 parts of an imidazoline compound, 0.05 to 1 part of polyethylene glycol, 0.05 to 1 part of a quaternary ammonium salt, 0.05 to 2 parts of a polyether compound, and 0.05 to 2 parts of oil.

[0009] In some embodiments, the composition comprises the following components in parts by weight: 0.1 to 2 parts of an imidazoline compound, 0.05 to 0.6 parts of polyethylene glycol, 0.05 to 0.5 parts of a quaternary ammonium salt, 0.05 to 1.5 parts of a polyether compound, and 0.05 to 1 part of oil.

[0010] In some embodiments, the composition comprises the following components in parts by weight: 0.5 to 2 parts of an imidazoline compound, 0.1 to 0.5 parts of polyethylene glycol, 0.05 to 0.5 parts of a quaternary ammonium salt, 0.2 to 1.5 parts of a polyether compound, and 0.2 to 1 parts of oil.

[0011] In some embodiments, the imidazoline compound is selected from alkyl imidazolines.

[0012] In some embodiments, the imidazoline compound is selected from alkyl bisimidazoline cationic surfactants.

[0013] In some embodiments, the imidazoline compound is selected from 2-(C17 and C17-unsaturated alkyl)-1-[2-(C18 and C18-unsaturated amino)ethyl]-4,5-dihydroxy-1-methyl sulfate (NAM; C).

[0014] In some embodiments, the polyethylene glycol is selected from polyethylene glycols with a molecular weight of 10 to 3000.

[0015] In some embodiments, the polyethylene glycol is selected from polyethylene glycols with a molecular weight of 10 to 1500.

[0016] In some embodiments, the polyethylene glycol is selected from polyethylene glycols with a molecular weight of 100 to 1500.

[0017] In some embodiments, the polyethylene glycol is selected from polyethylene glycols with a molecular weight of 1000 to 1500.

[0018] In some embodiments, the polyethylene glycol is selected from a combination of polyethylene glycol with a molecular weight of 1000 and polyethylene glycol with a molecular weight of 1500.

[0019] In some embodiments, the weight ratio of polyethylene glycol 1000 to polyethylene glycol 1500 in the polyethylene glycol is 1:0.5-5.

[0020] In some embodiments, the weight ratio of polyethylene glycol 1000 to polyethylene glycol 1500 in the polyethylene glycol is 1:0.5-2.

[0021] In some embodiments, the composition comprises the following components in parts by weight: 0.1 to 2 parts of an imidazoline compound, 0.02 to 0.5 parts of polyethylene glycol 1000, 0.06 to 0.5 parts of polyethylene glycol 1500, 0.05 to 0.5 parts of a quaternary ammonium salt, 0.05 to 1.5 parts of a polyether compound, and 0.05 to 1 part of oil.

[0022] In some embodiments, the composition comprises the following components in parts by weight: 0.5-2 parts of an imidazoline compound, 0.03-0.5 parts of polyethylene glycol 1000, 0.03-0.5 parts of polyethylene glycol 1500, 0.05-0.5 parts of a quaternary ammonium salt, 0.2-1.5 parts of a polyether compound, and 0.2-1 parts of oil.

[0023] In some embodiments, the quaternary ammonium salt is selected from single-chain and double-chain complex quaternary ammonium salts.

[0024] In some embodiments, the quaternary ammonium salt is selected from N-(2-hydroxyethyl) dodecylamide.

[0025] In some embodiments, the polyether compound is selected from amino polyether silicone oil.

[0026] In some embodiments, the oil is selected from the group consisting of cetyl 2-ethylhexanoate, 2-ethylhexyl palmitate, isopropyl palmitate, isopropyl myristate, isopropyl stearate, isobutyl stearate, 2-ethylhexyl stearate, isopropyl isostearate, butyl isostearate, decyl isostearate, lauryl isostearate, isodecyl isodecanoate, isodecyl isononanoate, isotridecyl isononanoate, isononyl isononanoate, neopentyl glycol dioctanoate, glyceryl tri-2-ethylhexanoate, propylene glycol dicaprate, caprylic / capric triglyceride, trimethylolpropane triisostearate, pentaerythritol tetra-2-ethylhexanoate, and dipentaerythritol fatty acid esters.

[0027] In some embodiments, the oil is selected from caprylic / capric triglyceride.

[0028] In some embodiments, the composition is a fiber treating agent.

[0029] In some embodiments, the composition is a non-woven fiber treatment agent.

[0030] In some embodiments, the present invention provides a fiber treatment solution comprising any of the above compositions.

[0031] In some embodiments, the fiber treatment solution further includes water.

[0032] In some embodiments, the fiber treatment solution contains water in an amount 100 times the volume of the composition.

[0033] In some embodiments, the present invention provides a non-woven fabric, wherein the fibers of the non-woven fabric are subjected to an attachment treatment using the composition.

[0034] In some embodiments, the composition is used in an amount of 1 to 10 kg per ton of non-woven fabric.

[0035] In some embodiments, the composition is used in an amount of 1 to 6 kg per ton of non-woven fabric.

[0036] In some embodiments, the composition is used in an amount of 1 to 4 kg per ton of non-woven fabric.

[0037] In some embodiments, the composition is used in an amount of 3 kg / ton of non-woven fabric.

[0038] In some embodiments, the nonwoven fabric is a nonwoven fabric having a triple helix structure.

[0039] In some embodiments, the raw materials for preparing the non-woven fabric further include silk fiber and viscose fiber.

[0040] In some embodiments, the raw materials for preparing the non-woven fabric further include silk fiber, a first viscose fiber, a second viscose fiber and a third viscose fiber.

[0041] In some embodiments, the raw materials for preparing the non-woven fabric further include the following components in parts by weight: 0.5 to 10 parts of mulberry silk fiber, 10-20 parts of the first viscose fiber, 20-40 parts of the second viscose fiber, and 50-70 parts of the third viscose fiber.

[0042] In some embodiments, the raw materials for preparing the non-woven fabric further include the following components in parts by weight: 0.5 to 8 parts of mulberry silk fiber, 10-15 parts of the first viscose fiber, 20-35 parts of the second viscose fiber, and 50-60 parts of the third viscose fiber.

[0043] In some embodiments, the raw materials for preparing the non-woven fabric further include the following components in parts by weight: 0.5 to 7 parts of mulberry silk fiber, 10 to 13 parts of the first viscose fiber, 20 to 30 parts of the second viscose fiber, and 50 to 55 parts of the third viscose fiber.

[0044] In some embodiments, the mulberry silk fiber has a fineness of 1.3-3.3 dtex and a length of 36-82 mm.

[0045] In some embodiments, the first viscose fiber is a soft fiber with a fineness of 0.5-1.11 dtex and a length of 38-57 mm.

[0046] In some embodiments, the second viscose fiber is a soft fiber with a fineness of 1.12-1.68 dtex and a length of 38-57 mm.

[0047] In some embodiments, the third viscose fiber is a fresh fiber having a fineness of 1.69-2.0 dtex and a length of 38-57 mm.

[0048] In some embodiments, the silk fiber is obtained by the following method: (1) obtaining silkworm cocoons with a fresh cocoon grain weight of 1.8-2.0 g, a fresh shell weight of 0.40-0.44 g, and a dry shell weight of 0.36-0.38 g through a square clustering tool; a total length of 1300-1500 m of silk and a silk weight of 0.40-0.44 g; (2) drying the silkworm cocoons; (3) soaking the cocoons and reeling the silk; (4) cutting the cocoons to obtain mulberry silk fibers.

[0049] In some embodiments, the silk cocoons are spring silkworm cocoons.

[0050] In some embodiments, in step (1), the diameter of the single filament of the cocoon silk is 13-18 microns, and the average fineness is 2.8-3.3 denier.

[0051] In some implementations, in step (1), the length of the cocoon silk is a common multiple of 36-82 mm.

[0052] In some embodiments, in step (3), biological enzymes are added to soak the cocoons at 40-60°C.

[0053] In some embodiments, the biological enzyme is papain.

[0054] In some embodiments, the length of the cut cocoon silk is 36-82 mm.

[0055] In some embodiments, the sericin content in the mulberry silk fiber is 6-9wt%, the fiber length is 36-82mm, and the fiber fineness is 1.3-3.3dtex. Mulberry silk is composed of two triangular or semi-elliptical silk fibers wrapped with sericin, and the cross-section is elliptical. Mulberry silk fiber is a protein fiber, and sericin and fibroin are its main components. The diameter of a single filament of mulberry silk is about 13-18 microns, which is equivalent to 1 / 20 of a hair. The unit of fineness is denier, and 9000 meters of silk weighing 1 gram is 1 denier. The larger the number, the thicker the silk. The average fineness of mulberry silk is generally 2.8-3.3D for spring cocoons. The total length of a mulberry cocoon can reach 1000-1500 meters after the silk is fully unfolded.

[0056] In some embodiments, the nonwoven fabric has a triple helix structure.

[0057] In some embodiments, the nonwoven fabric is a soft towel.

[0058] In some embodiments, the present invention provides use of any of the compositions described in preparing nonwoven fabrics.

[0059] In some embodiments, the composition is used in an amount of 1 to 10 kg per ton of non-woven fabric.

[0060] In some embodiments, the composition is used in an amount of 1 to 6 kg per ton of non-woven fabric.

[0061] In some embodiments, the composition is used in an amount of 1 to 4 kg per ton of non-woven fabric.

[0062] In some embodiments, the composition is used in an amount of 3 kg / ton of non-woven fabric.

[0063] In some embodiments, the present invention provides a method for preparing a nonwoven fabric, comprising the following steps:

[0064] (1) opening the silk fibers and viscose fibers for the first time respectively;

[0065] (2) mixing silk fiber and viscose fiber to obtain mixed fiber;

[0066] (3) opening the mixed fiber in step (2) for a second time;

[0067] (4) Combing, cross-laying, pulling, and hydroentanglement to obtain wet cloth;

[0068] (5) removing free water from the wet cloth;

[0069] (6) contacting the wet cloth from which free water has been removed with the fiber treating agent;

[0070] (7) drying to obtain the nonwoven fabric.

[0071] In some embodiments, in step (1), the silk fibers and the viscose fibers are opened for the first time to form an opened section, and then the mulberry silk fibers are evenly placed in the pre-opened section.

[0072] In some embodiments, in step (4), the cotton layer after the second opening passes through a cotton storage box and is then transferred to a pneumatic cotton box, which feeds the cotton layer into a carding machine.

[0073] In some embodiments, the carding machine uses an S-type feeding mode to card the cotton bundle into single fibers.

[0074] In some embodiments, in step (7), the drying temperature is 100-150°C.

[0075] In some embodiments, the drying temperature is 105-140°C.

[0076] In some embodiments, the drying temperature is 110-135°C.

[0077] In some embodiments, in step (6), the amount of the fiber treatment agent used is 1 to 10 kg per ton of non-woven fabric.

[0078] In some embodiments, in step (6), the amount of the fiber treatment agent used is 1 to 6 kg per ton of non-woven fabric.

[0079] In some embodiments, in step (6), the amount of the fiber treatment agent used is 1 to 4 kg per ton of non-woven fabric.

[0080] In some embodiments, in step (6), the amount of the fiber treatment agent used is 3 kg / ton of non-woven fabric. BRIEF DESCRIPTION OF THE DRAWINGS

[0081] Figure 1A and Figure 1B They are microscope images of ordinary single viscose fiber and the nonwoven fabric obtained after spunlacing of the present invention.

[0082] Figure 2 This is an enlarged image of the nonwoven fabric, the final product, prepared in the examples of the present application.

[0083] Figure 3A and Figure 3B They are cross-sectional microscope images of the nonwoven fabric according to the embodiment of the present application before and after being treated with a fiber finishing agent, Figure 3C This is a microscope image of fibers in the nonwoven fabric according to an embodiment of the present application after being treated with a fiber finishing agent.

[0084] Figure 4 Schematic diagram showing the S-type feeding pattern. DETAILED DESCRIPTION

[0085] In order to further explain the technical means and effects adopted by the present application to achieve the predetermined purpose, the specific implementation methods, structures, features and effects of the present application are described in detail below in combination with the accompanying drawings and preferred embodiments.

[0086] In the event that any definition set forth below conflicts with any document incorporated herein by reference, the definition set forth shall control.

[0087] As used herein, the terms "comprising," "having," "containing," and "including," and other similar forms, and their grammatical equivalents, are equivalent in meaning and are open ended, i.e., one or more items following any of these words are not meant to be an exhaustive listing of the item or items, nor are they meant to be limited to the listed item or items. For example, something that "comprising" components A, B, and C may consist of components A, B, and C (i.e., contain only components A, B, and C), or may contain not only components A, B, and C, but may also include one or more other components. Thus, it is intended and understood that "comprising" and its similar forms and its grammatical equivalents encompass disclosure of embodiments that "consist essentially of" or "consist of."

[0088] As used herein, including in the appended claims, the singular forms "a," "or," and "the" include plural referents unless the context clearly dictates otherwise.

[0089] Unless defined otherwise, all technical and scientific terms used herein have the same meanings as commonly understood by one of ordinary skill in the art.

[0090] Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. Although many methods and reagents are similar or equivalent to those described herein, exemplary methods and materials are disclosed herein.

[0091] It is to be understood that the present disclosure is not limited to the particular methodology, protocols, reagents, etc. described herein and as such may vary. The terminology used herein is for the purpose of describing particular embodiments or aspects only and is not intended to limit the scope of the present disclosure.

[0092] In the examples in this article, the 1.11dtex*40mm "fine and soft fiber" comes from Sateri, hereinafter referred to as the first viscose fiber.

[0093] 1.33dtex*40mm "soft fiber" comes from Sateri, hereinafter referred to as the second viscose fiber.

[0094] 1.70dtex*40mm "fresh fiber" comes from Sateri, hereinafter referred to as the third viscose fiber.

[0095] Example 1 Obtaining mulberry silk fibers

[0096] 1.1 Selection of silk cocoons and silk length

[0097] The cocoons of spring silkworms with a total length of 1300-1500 m and a cocoon weight of 0.40-0.44 g were used in the examples of this article. The single filament diameter of the cocoon silk was about 13-18 microns, and the average fineness was about 2.8-3.3D (denier). The total length of the cocoon silk was a common multiple of 36-82 mm.

[0098] 1.2 Drying silkworm cocoons

[0099] Dry the cocoons at a medium temperature of 60–70°C to a constant weight.

[0100] By drying silkworm cocoons at medium temperature, not only can the technical effects of general drying be achieved, such as preventing fresh cocoons from being damaged by moths or maggots, and removing moisture for long-term storage, but also compared with the commonly used high-temperature drying of 90-100℃, it can also appropriately denature the soluble sericin in the fresh cocoons to facilitate smooth relaxation during the reeling process, and preserve the sericin with high quality.

[0101] 1.3 Cocoon Soaking and Silk Reeling

[0102] Soak the cocoons in warm water at 40–60°C with 100–130 ppm of papain. When the cocoons are easy to unwind, transfer them to cold water for spinning.

[0103] Compared with the existing technology of boiling cocoons at 100°C with the addition of soda ash, this method can retain sericin to the greatest extent, protect the silk quality, and keep the fiber thickness uniform.

[0104] The cocoon silk obtained through the above steps is bright, shiny, tough and colorful.

[0105] 1.4 Cut the cocoon silk to obtain silk fibers that can be used to lay nets

[0106] Cut the cocoon silk to a cutting length of 36-82mm.

[0107] The cut length is suitable for the spunlace process and can be mixed with viscose fiber to facilitate opening and combing.

[0108] The silk cocoons described in 1.1 above and the length of the silk after cutting can reduce the generation of fine fibers and avoid linting after hydroentanglement.

[0109] The characteristics of mulberry silk (raw silk) fiber are as follows:

[0110] Sericin content: 6-9% (percentage by weight of raw silk fiber)

[0111] Fiber length: 36–82 mm

[0112] Fiber fineness: 1.3–3.3dtex

[0113] Fiber color: off-white / white

[0114] Moisture regain: 9–10%

[0115] Moisture absorption: At a relative humidity of 100%, the moisture absorption rate is 30-35%, and the moisture dissipation is fast.

[0116] Example 2: Hydroentanglement to obtain a triple helical nonwoven fabric

[0117] The raw materials and proportions included in the preparation of the non-woven fabric in this embodiment are:

[0118] Mulberry silk fiber, which is a mulberry silk fiber with a fineness of 2.3 dtex and a length of 62 mm, accounting for 2 wt% by weight;

[0119] The first viscose fiber is a soft fiber with a fineness of 1.11 dtex and a length of 40 mm, and a weight proportion of 13 wt %;

[0120] The second viscose fiber is a soft fiber with a fineness of 1.33 dtex and a length of 40 mm, accounting for 30 wt% by weight;

[0121] The third viscose fiber is a fresh fiber with a fineness of 1.70 dtex and a length of 40 mm, accounting for 55 wt% by weight;

[0122] In this embodiment, the mulberry silk fiber is the mulberry silk fiber obtained in Example 1.

[0123] 2.1 Pre-opening

[0124] The first viscose fiber, the second viscose fiber, and the third viscose fiber are weighed according to the above weight ratio and pre-opened respectively.

[0125] After pre-opening, a 5 kg pre-opening section is formed, and then accurately weighed mulberry silk fibers (according to the ratio of this embodiment) are evenly placed into the pre-opening section.

[0126] 2.2 Stirring and super mixing

[0127] Stir evenly and super mix, stir and super mix the three viscose fibers and mulberry silk fibers according to the formula ratio.

[0128] 2.3 Fine opening

[0129] The three types of viscose fibers and mulberry silk fibers that have been stirred and super-mixed according to a formula ratio are finely opened.

[0130] 2.4 Combing

[0131] The opened cotton layer (i.e. the finely opened mixed fiber) passes through the cotton storage box and then is transferred to the air pressure box. The air pressure box will feed the appropriate amount of cotton layer into the carding machine.

[0132] The cotton layer is sent to the chest cylinder through the cotton feeding roller for pre-combing, and then sent to the main cylinder through the transfer roller to comb the cotton bundle into single fibers. The cotton layer enters the first working roller of the main cylinder for combing and peeling, and then goes to two doffer rollers, where it is peeled and output to two conveying net curtains respectively, and then the two layers are combined into one for laying. In order to solve the cotton jam problem, the S-type feeding mode is selected, as shown in the schematic diagram. Figure 4 shown.

[0133] After S-shaped feeding, the mulberry silk fibers are well combed under the action of the licker-in roller and the AVT chest cylinder. Especially under the action of mechanical force, the sericin of the mulberry silk can be evenly distributed on the viscose fiber, and the fibroin is evenly distributed among the viscose fiber, making the fiber finishing agent play a better role.

[0134] 2.5 Cross-laying and traction to form a non-woven fabric with a left-handed spiral structure

[0135] After the cotton layer is combed, a 15-meter-wide mesh curtain is output through a combination of a cross-lapping machine and a drafting machine for cross-lapping and drafting to obtain a non-woven fabric with a left-handed spiral structure.

[0136] 2.6 Hydroentanglement

[0137] The hydroentanglement head is used to hydroentangle the non-woven fabric with a left-handed spiral structure to obtain a wet non-woven fabric. These hydroentanglement heads can maximize the use of water energy within the entire working pressure range to produce high-powered continuous and consistent water needles, ensuring that the finished fabric has consistent thickness and uniformity.

[0138] The nonwoven fabric of the embodiment of the present application is obtained after spunlacing, and its microscope image is as follows: Figure 1B The microscope image of the nonwoven fabric obtained by spunlacing ordinary single viscose fiber is as follows: Figure 1A .from Figure 1A and Figure 1B It can be seen from the results shown that the fiber structure of ordinary single viscose fiber after hydroentanglement presents irregular winding, while the non-woven fabric of the embodiment of the present application forms a triple spiral winding structure after hydroentanglement.

[0139] 2.7 Addition of fiber treatment agents

[0140] After the spunlace, the wet nonwoven fabric is dehydrated by vacuum suction to remove the free water in the wet fabric, and the diluted fiber treatment agent solution is sprayed onto the wet fabric without free water at a spraying pressure of 4-6kpa.

[0141] Mulberry silk fiber, fresh viscose fiber and ultrafine viscose fiber have formed a stable wet non-woven fabric. Special fiber treatment agent is used to perfectly combine mulberry silk fiber and viscose fiber, allowing mulberry silk protein and sericin to adhere to viscose fiber, giving viscose fiber a silky soft effect.

[0142] The fiber treatment agent solution is prepared by diluting the fiber treatment agent composition with water, that is, 1 part of fiber treatment agent: 130 parts of water.

[0143] 2.8 Determination of amino acid content

[0144] According to the raw material formula for preparing nonwoven fabrics in this embodiment, sheets were made in the laboratory, free water was removed, and a precisely measured 0.01-5% fiber finishing agent solution was evenly sprayed on the wet sheets. Then, the sheets were dried to 93-94%. The results of amino acid detection of randomly selected fabric samples or slices are shown in Table 1. It can be seen that all sulfur-containing amino acids have reacted and cannot be detected.

[0145] Table 1

[0146] Amino Acids Content (mg / kg) Amino Acids Content (mg / kg) Amino Acids Content (mg / kg) Aspartic acid 112.03 Cysteine 0.00 Phenylalanine 135.51 Threonine 214.68 Valine 177.15 Lysine 42.30 Serine 971.93 Methionine 0.00 Histidine 27.74 Glutamate 204.97 Isoleucine 25.83 Arginine 27.92 Glycine 2,706.81 Leucine 20.16 Proline 0.00 Alanine 2,181.31 Tyrosine 395.40

[0147] It can be seen that the fiber finishing agent has a special hydrolysis effect on the sericin and fibroin on the mulberry silk. The hydrolyzed sericin and fibroin are also polar, making them firmly adsorbed on the viscose fiber. After entering the drying process, they are solidified on each viscose fiber, giving each fiber softness.

[0148] In this step, the formula of the fiber finishing agent solution is the formula in Scheme 5-C in Example 3.

[0149] 2.9 Drying

[0150] The nonwoven fabric treated with the fiber treating agent was dried at a drying temperature of 110° C. to obtain a mother roll (hereinafter also referred to as nonwoven fabric or raw fabric).

[0151] Example 3 Detection of nonwoven fabrics

[0152] 1. Appearance inspection of non-woven fabrics

[0153] The final product nonwoven fabric obtained in step 2.9 of Example 2 looks like silk, feels silky and soft, and has an appearance that simulates silk, and is called "silky nonwoven fabric" or "ultra-soft nonwoven fabric". Figure 2 This is an enlarged image of the nonwoven fabric, the final product, prepared in the examples of the present application.

[0154] 2. Comparison of microscope images before and after adding fiber treatment agent

[0155] Figure 3A and Figure 3B They are cross-sectional microscope images of the nonwoven fabric according to the embodiment of the present application before and after being treated with a fiber finishing agent, Figure 3C This is a microscope image of the fibers in the nonwoven fabric according to the embodiment of the present application after being treated with a fiber finishing agent. Figure 3A and 3B It can be seen that after the action of the fiber treatment agent, sericin and silk fibroin adhere to the viscose fiber, filling the longitudinal grooves on the viscose fiber to make it straight, greatly reducing diffuse reflection, enhancing the transparent texture, and producing a silky luster; at the same time, the rigidity of the viscose fiber is reduced under the action of the fiber finishing agent, making it have an obvious silky feel when touched. Figure 3CIt can be seen that after the viscose fiber is treated with a fiber finishing agent, sericin and silk fibroin are attached to the viscose fiber, presenting transparent collagen-like fibers or collagen bundles.

[0156] 3. Performance test comparison of nonwoven fabrics obtained with different fiber treatment agents

[0157] Table 2 Preparation process and materials of nonwoven fabrics

[0158]

[0159]

[0160]

[0161] Table 2 - continued

[0162]

[0163] Table 2 - continued

[0164]

[0165] Table 2 - continued

[0166]

[0167] Note: (1) Except for whiteness, the data in Table 2 above are all mean values ​​± SD; (2) Odor test method standard: the odor needs to be smelled after soaking in water at 55 ± 5 °C; (3) Martindale abrasion resistance test method standard: the upper and lower plates of the Martindale tester use the same test cloth on the front side, and rotate 30 times under a pressure of 9 kPa to reach level 3.5 or above.

[0168] In Table 2, kg / ton of cloth means that 1 kg of fiber finishing agent was added to 1 ton of non-woven fabric (referring to the parent roll obtained in step 2.9 of Example 2).

[0169] Among them, in Table 2:

[0170] (1) The imidazoline is specifically 2-(C17 and C17-unsaturated alkyl)-1-[2-(C18 and C18-unsaturated amino)ethyl]-4,5-dihydroxy-1-methyl sulfate (NAM; C) (CAS No.: 72749-55-4).

[0171] (2) Anion blocking composite quaternary ammonium salt is specifically N-(2-hydroxyethyl) dodecylamide (CAS No.: 142-78-9)

[0172] (3) The polyethylene polyether modified product is specifically amino polyether silicone oil (for the synthesis method, see Guo Kun, et al. Application of amino polyether silicone oil in shampoo. Organic Silicone Materials. 2009);

[0173] (4) Caprylic / capric triglyceride (CAS No.: 65381-09-1).

[0174] 3. Performance test of various non-woven fabrics

[0175] 3.1 Comparison with various non-woven fabrics on the market

[0176] The results are compared in Table 3.

[0177] Table 3

[0178]

[0179] Table 3 - continued

[0180]

[0181] Table 3 - continued

[0182]

[0183] Group 4 in Table 3 is the final product obtained after slitting the mother roll obtained in step 2.9 of Example 2 of this invention, and the fiber finishing agent used is the same as that of scheme 5-C in Table 2 of Example 3. The data in Table 2 above are all mean values ​​± SD.

[0184] Test Example 1

[0185] The drying temperature in Example 2 is set to 150° C., and the other steps are the same as those in Scheme 5-C in Table 2. The comprehensive hand feel HF value of the obtained nonwoven fabric is about 90.

[0186] The above-mentioned implementation modes are only preferred implementation modes of the present application and cannot be used to limit the scope of protection of the present application. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present application shall fall within the scope of protection required by the present application.

Claims

1. A composition, characterized in that The invention comprises the following components: an imidazoline compound, polyethylene glycol, a quaternary ammonium salt, a polyether compound and oil; the imidazoline compound is selected from 2-(C17 and C17-unsaturated alkyl)-1-[2-(C18 and C18-unsaturated amino)ethyl]-4,5-dihydroxy-1-methyl sulfate (NAM; C); the polyethylene glycol is selected from a combination of polyethylene glycol with a molecular weight of 1000 and polyethylene glycol with a molecular weight of 1500; the quaternary ammonium salt is selected from N-(2-hydroxyethyl) dodecylamide; the polyether compound is selected from aminopolyether silicone oil; and the oil is selected from caprylic / capric triglyceride.

2. The composition according to claim 1, characterized in that The invention comprises the following components in parts by weight: 0.05 to 5 parts of imidazoline compound, 0.01 to 2 parts of polyethylene glycol, 0.05 to 2 parts of quaternary ammonium salt, 0.05 to 5 parts of polyether compound and 0.05 to 5 parts of oil.

3. The composition according to claim 1, characterized in that The invention comprises the following components in parts by weight: 0.1 to 5 parts of imidazoline compound, 0.05 to 1 part of polyethylene glycol, 0.05 to 1 part of quaternary ammonium salt, 0.05 to 2 parts of polyether compound and 0.05 to 2 parts of oil.

4. The composition according to claim 1, characterized in that The invention comprises the following components in parts by weight: 0.1 to 2 parts of imidazoline compound, 0.05 to 0.6 parts of polyethylene glycol, 0.05 to 0.5 parts of quaternary ammonium salt, 0.05 to 1.5 parts of polyether compound and 0.05 to 1 part of oil.

5. The composition according to claim 1, characterized in that The composition comprises the following components in parts by weight: 0.5 to 2 parts of imidazoline compound, 0.1 to 0.5 parts of polyethylene glycol, 0.05 to 0.5 parts of quaternary ammonium salt, 0.2 to 1.5 parts of polyether compound and 0.2 to 1 part of oil.

6. The composition according to claim 1, characterized in that The weight ratio of polyethylene glycol 1000 to polyethylene glycol 1500 in the polyethylene glycol is 1:0.5-5.

7. The composition according to claim 1, characterized in that The weight ratio of polyethylene glycol 1000 to polyethylene glycol 1500 in the polyethylene glycol is 1:0.5-2.

8. The composition according to claim 1, characterized in that The composition comprises the following components in parts by weight: 0.1-2 parts of imidazoline compound, 0.02-0.5 parts of polyethylene glycol 1000, 0.06-0.5 parts of polyethylene glycol 1500, 0.05-0.5 parts of quaternary ammonium salt, 0.05-1.5 parts of polyether compound and 0.05-1 part of oil.

9. The composition according to claim 1, characterized in that The composition comprises the following components in parts by weight: 0.5-2 parts of imidazoline compound, 0.03-0.5 parts of polyethylene glycol 1000, 0.03-0.5 parts of polyethylene glycol 1500, 0.05-0.5 parts of quaternary ammonium salt, 0.2-1.5 parts of polyether compound and 0.2-1 parts of oil.

10. The composition according to any one of claims 1 to 9, characterized in that The composition is a fiber treating agent.

11. The composition according to any one of claims 1 to 9, characterized in that The composition is a non-woven fabric fiber treating agent.

12. A fiber treatment solution, characterized in that A composition comprising any one of claims 1 to 11.

13. The fiber treatment solution according to claim 12, characterized in that The fiber treating solution also includes water.

14. The fiber treatment solution according to claim 12, characterized in that The fiber treatment solution contains water in an amount 100 times the volume of the composition.

15. A nonwoven fabric, characterized in that: The fibers of the nonwoven fabric are fibers of the nonwoven fabric subjected to an adhesion treatment using the composition according to any one of claims 1 to 11.

16. The nonwoven fabric according to claim 15, characterized in that The dosage of the composition is 1-10 kg / ton of non-woven fabric.

17. The nonwoven fabric according to claim 15, characterized in that The dosage of the composition is 1-6 kg / ton of non-woven fabric.

18. The nonwoven fabric according to claim 15, characterized in that The dosage of the composition is 1-4 kg / ton of non-woven fabric.

19. The nonwoven fabric according to claim 15, characterized in that The dosage of the composition is 3 kg / ton of non-woven fabric.

20. The nonwoven fabric according to claim 15, characterized in that The raw materials for preparing the non-woven fabric also include silk fiber and viscose fiber.

21. The nonwoven fabric according to claim 15, characterized in that The raw materials for preparing the non-woven fabric also include silk fiber, first viscose fiber, second viscose fiber and third viscose fiber.

22. The nonwoven fabric according to claim 15, characterized in that The raw materials for preparing the nonwoven fabric also include the following components in parts by weight: 0.5-10 parts of mulberry silk fiber, 10-20 parts of a first viscose fiber, 20-40 parts of a second viscose fiber, and 50-70 parts of a third viscose fiber.

23. The nonwoven fabric according to claim 15, characterized in that The raw materials for preparing the non-woven fabric also include the following components in parts by weight: 0.5 to 8 parts of mulberry silk fiber, 10 to 15 parts of the first viscose fiber, 20 to 35 parts of the second viscose fiber, and 50 to 60 parts of the third viscose fiber.

24. The nonwoven fabric according to claim 15, characterized in that The raw materials for preparing the non-woven fabric also include the following components in parts by weight: 0.5-7 parts of mulberry silk fiber, 10-13 parts of the first viscose fiber, 20-30 parts of the second viscose fiber, and 50-55 parts of the third viscose fiber.

25. The nonwoven fabric according to claim 22, characterized in that The mulberry silk fiber has a fineness of 1.3-3.3 dtex and a length of 36-82 mm.

26. The nonwoven fabric according to claim 21, wherein The first viscose fiber is a soft fiber with a fineness of 0.5-1.11 dtex and a length of 38-57 mm.

27. The nonwoven fabric according to claim 21, wherein The second viscose fiber is a soft fiber with a fineness of 1.12-1.68 dtex and a length of 38-57 mm.

28. The nonwoven fabric according to claim 21, wherein The third viscose fiber is a fresh fiber with a fineness of 1.69-2.0 dtex and a length of 38-57 mm.

29. The nonwoven fabric according to claim 20, characterized in that The silk fiber is obtained by the following method: (1) The cocoons were obtained by using a square clustering tool, with each fresh cocoon weighing 1.8–2.0 g, fresh shell weighing 0.40–0.44 g, and dry shell weighing 0.36–0.38 g; the total length of the cocoon silk was 1300–1500 m, and the cocoon silk weight was 0.40–0.44 g; (2) Drying silkworm cocoons; (3) Cocoon soaking and silk reeling; (4) Cut the cocoon silk to obtain silk fiber.

30. The nonwoven fabric according to claim 29, wherein The silk cocoons are spring silkworm cocoons.

31. The nonwoven fabric according to claim 29, wherein In step (1), the diameter of the single silk filament is 13-18 μm, and the average fineness is 2.8-3.3 denier.

32. The nonwoven fabric according to claim 29, wherein In the step (1), the length of the cocoon silk is a common multiple of 36-82 mm.

33. The nonwoven fabric according to claim 29, characterized in that In step (3), add biological enzymes and soak the cocoons at 40–60°C.

34. The nonwoven fabric according to claim 33, characterized in that The biological enzyme is papain.

35. The nonwoven fabric according to claim 29, wherein The length of the silk after cutting is 36–82 mm.

36. The nonwoven fabric according to claim 20, wherein: The sericin content in the silk fiber is 6-9wt%, the fiber length is 36-82 mm, and the fiber fineness is 1.3-3.3 dtex.

37. The nonwoven fabric according to any one of claims 15 to 36, characterized in that: The non-woven fabric is a non-woven fabric with a triple helix structure.

38. Use of the composition according to any one of claims 1 to 11 in the preparation of non-woven fabrics.

39. The use according to claim 38, characterized in that The non-woven fabric is used for preparing soft towels.

40. The use according to claim 38, characterized in that The dosage of the composition is 1-10 kg / ton of non-woven fabric.

41. The use according to claim 38, characterized in that The dosage of the composition is 1-6 kg / ton of non-woven fabric.

42. The use according to claim 38, characterized in that The dosage of the composition is 1-4 kg / ton of non-woven fabric.

43. The use according to claim 38, characterized in that The dosage of the composition is 3 kg / ton of non-woven fabric.

44. The use according to claim 38, characterized in that The non-woven fabric is a non-woven fabric with a triple helix structure.

45. The use according to claim 38, characterized in that The nonwoven fabric is a soft towel.

46. ​​A method for preparing the nonwoven fabric according to claim 15, characterized in that: The following steps are involved: (1) Opening the viscose fiber for the first time; (2) mixing silk fiber and viscose fiber to obtain mixed fiber; (3) opening the mixed fiber in step (2) for a second time; (4) Combing, cross-laying, pulling, and hydroentangling to obtain wet cloth; (5) removing free water from the wet cloth; (6) contacting the wet cloth from which free water has been removed with the fiber treating agent; (7) drying to obtain the nonwoven fabric.

47. The method of claim 46, wherein: After the viscose fibers are opened for the first time, an opening section is formed, and then the silk fibers are evenly placed into the opening section.

48. The method of claim 46, wherein: In step (3), the mixed fibers after the second opening pass through a cotton storage box and are then transferred to an air pressure cotton box, which feeds the mixed fibers into a carding machine.

49. The method of claim 48, wherein: The carding machine uses an S-type feeding mode to card the mixed fibers into single fibers.

50. The method of claim 46, wherein: In step (7), the drying temperature is 80-150°C.

51. The method of claim 46, wherein: In step (7), the drying temperature is 105-140°C.

52. The method of claim 46, wherein: In step (7), the drying temperature is 110-135°C.

53. The method of claim 46, wherein: In step (7), the drying temperature is 110-125°C.

54. The method of claim 46, wherein: In step (6), the amount of the fiber treatment agent used is 1-10 kg / ton of non-woven fabric.

55. The method of claim 46, wherein: In step (6), the amount of the fiber treatment agent used is 1-6 kg / ton of non-woven fabric.

56. The method of claim 46, wherein: In step (6), the amount of the fiber treatment agent used is 1-4 kg / ton of non-woven fabric.

57. The method of claim 46, wherein: In step (6), the amount of the fiber treatment agent used is 3 kg / ton of non-woven fabric.

58. The method of claim 46, wherein: The non-woven fabric is a non-woven fabric with a triple helix structure.

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