CN117265693A

CN117265693A - Wig fiber and preparation method thereof

Info

Publication number: CN117265693A
Application number: CN202210826534.4A
Authority: CN
Inventors: 武玉和; 许向东; 兰宇轩
Original assignee: Beijing Micro Structure Factory Biotechnology Co ltd
Current assignee: Beijing Micro Structure Factory Biotechnology Co ltd
Priority date: 2022-06-14
Filing date: 2022-07-13
Publication date: 2023-12-22
Also published as: WO2023241615A1

Abstract

The invention provides wig fiber, and a preparation method and application thereof. Particularly, the wig fiber contains PHA, and the wig fiber prepared from PHA has good antibacterial and anti-mite properties and hand feeling without adding an antibacterial agent or a smoothing agent, has the characteristics of light weight, good dyeing property and environment friendliness and degradability, and can be used for preparing hair products with high simulation effects.

Description

Wig fiber and preparation method thereof

Technical Field

The invention relates to the field of functional fiber materials, in particular to wig fibers and a preparation method thereof.

Background

With the increasing level of modern living matter, there is an increasing demand for the fashion industry, where the spread of "fashion on top" continues to increase the demand for hair style finishing worldwide. The wig is taken as a fashion single article, can shape the personality and the mind of consumers, improves the image and the confidence of the consumers, has huge market scale and high application added value.

Patent document CN102926024A, CN112048781A, CN112030259a and the like all provide degradable antibacterial flame-retardant wig fibers based on PLA, which are mainly based on PLA, and additionally added with flame retardants, antibacterial agents and the like. However, although PLA is a degradable material, environments such as composting are required, and degradation conditions are severe and the speed is slow; in addition, PLA is difficult to dye, and the requirement for the wig to want subsequent dyeing cannot be met; PLA itself has limited antimicrobial properties, requires additional external ingredients to meet the actual antimicrobial needs, and has a large limitation.

In order to solve the problem, patent CN1207422A of japanese brillouin chemistry treats animal skin or bone with alkali or enzyme to obtain water-soluble collagen, and then prepares regenerated collagen fiber for wig after solution spinning and proper crosslinking, but the obtained fiber is not resistant to high temperature, patent CN1420949a mixes and uniformly disperses thermoplastic resin (such as polyacrylate, PVC, etc.) with small particle size with the regenerated collagen solution, and then re-spins, so that the heat resistance of the regenerated collagen fiber is improved. However, regenerated collagen, protein fibers and the like have poor wet heat resistance, yellow natural color, and the problem of heavy weight (not a loose structure of the middle cavity of human hair) needs to be solved.

Accordingly, the present invention proposes to prepare wigs using Polyhydroxyalkanoates (PHA) as a substrate. PHA is a natural polymer material obtained by microbial fermentation, has excellent thermoplastic processability, biocompatibility and 100% biodegradability, and can be rapidly degraded without composting. More than 150 PHA monomers have been found to have different properties, so materials that can achieve various performance requirements such as high strength, high toughness, etc. by blending, etc. have broad prospects in wig applications.

Disclosure of Invention

The novel wig fiber prepared by the invention has good antibacterial and anti-mite properties and skin-friendly properties by taking PHA as a base material and adding no additional antibacterial agent or smoothing agent, and can be used for preparing high-simulation hair products. Meanwhile, the prepared wig fiber has good hand feeling, good air permeability, portability, easy re-dyeing and higher strength and durability.

In particular, in a first aspect, a wig fiber is provided, said wig fiber comprising a substrate, said substrate comprising poly-3-hydroxybutyrate (PHB).

Preferably, the substrate further comprises Polyhydroxyalkanoates (PHAs) other than PHB, further preferably, the PHAs other than PHB include, but are not limited to, various homo-, random co-and block copolymers comprising 3-hydroxypropionic acid (3 HP), 3-hydroxybutyric acid, 3-hydroxyvaleric acid, 3-hydroxyhexanoic acid, 4-hydroxybutyric acid and 5-hydroxyvaleric acid or derivatives thereof, more preferably, the PHAs other than PHB include one or a combination of two or more of poly-3-hydroxyvalerate (PHV), poly-3-hydroxypropionate (P3 HP), a copolymer of 3-hydroxybutyric acid and 3-hydroxyvaleric acid (PHBV), poly-3-hydroxyoctanoate (PHO), poly-3-hydroxynonanoate (PHN), a copolymer of 3-hydroxybutyric acid and 4-hydroxybutanoic acid (P3 HB4 HB), or a copolymer of 3-hydroxybutyric acid and 3-hydroxyhexanoic acid (PHHx).

Preferably, the non-PHB PHA comprises P3HB4HB, PHBHHx and/or PHBV.

Preferably, the molar content of 3HV in PHBV is any one of 2-30%, e.g., 2%, 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 15%, 20%, 25% or 30%, the molar content of 4HB in P3HB4HB is any one of 3-40%, e.g., 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 15%, 20%, 25%, 30%, 35% or 40%, and the molar content of HHx in PHBHHx is any one of 3-25%, e.g., 3%, 4%, 5%, 6%, 7%, 8%, 9%, 10%, 15%, 20% or 25%.

Preferably, the mass ratio of PHB to PHA of non-PHB is 1:3-5:1 or 1:2-5:1, more preferably (1-1.5): 1, more preferably (1.2 to 1.4): 1.

Preferably, the PHB mass content is any one of 20% -90%, preferably 25% -83%, preferably 20% -40%, for example 20%, 21%, 23%, 25%, 27%, 29%, 30%, 33%, 35%, 36%, 37%, 38%, 39%, 40%, 50%, 60%, 70%, 80%, 83%, 85%, 90%.

Preferably, the PHA content of the non-PHB is any one of 5% to 50%, preferably 5% to 30%, for example 5%, 6%, 7%, 8%, 9%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45% or 50%.

Preferably, the non-PHB PHA comprises P3HB4HB, wherein the P3HB4HB mass content is any of 5% -50%, preferably 5% -30%, such as 5%, 6%, 7%, 8%, 9%, 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45% or 50%.

Preferably, the wig fiber further comprises an auxiliary material, wherein the auxiliary material comprises a natural or non-natural auxiliary material, and further preferably, the natural auxiliary material comprises one or more than two of polylactic acid (PLA), regenerated cellulose, alginate fiber or soybean protein; the non-natural auxiliary materials include, but are not limited to, one or a combination of more than two of polyvinyl chloride (PVC), polyacrylonitrile (PAN), polybutylene adipate/terephthalate (PBAT), polybutylene succinate (PBS), polybutylene adipate (PBA), polybutylene terephthalate (PBT), polypropylene carbonate (PPC), nylon 6 (PA 6), nylon 66 (PA 66), polyester (PET), polypropylene (PP), carbon fiber, aramid 1313 or aramid 1414.

In one embodiment of the present invention, the wig fiber comprises a base material and an auxiliary material.

Preferably, the mass ratio of the base material to the auxiliary material is (1-10): any one of the values of (1-8).

Preferably, the mass ratio of the base material to the auxiliary material is any numerical value of 1:3-5:4 or 1:3-5:3 or 1:2-5:6 or 1:3-7:2 or 2:1-1:3 or 5:2-3:8 or 2:1-1:3 or 3:1-2:5 or 10:1-3:1. Further preferably, the ratio is any one of the values 1:1 to 1:1.6 or 1:1 to 1:1.2 or 1:1 to 1:1.5 or 1:1 to 4.7:1 or 1:1 to 1.3:1 or 1:1 to 1.2:1.

Preferably, the substrate has a mass content of any one of 20% to 100% (preferably 50% to 100%), for example 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%, 75%, 80%, 85%, 90%, 95%, 98%, 100%.

Preferably, the mass content of the auxiliary material is any value from 0% to 70% (preferably 0% to 50%), for example, 0%, 5%, 10%, 20%, 25%, 30%, 35%, 40%, 45%, 50%, 55%, 60%, 65%, 70%.

Preferably, the wig fiber structure comprises a circular cross-section fiber, a profiled fiber or a composite fiber structure, wherein the profiled fiber cross-section structure comprises but is not limited to an oval, rectangle, square, triangle, diamond, double circle or hollow circle structure, and the composite fiber structure comprises but is not limited to a side-by-side, sheath-core or sea-island structure, wherein the side-by-side can be semicircle/semicircle side-by-side or stripe.

Preferably, the wig fiber has a diameter or side length of 38-175 μm. For example, when the wig fiber is constructed as a fiber of circular cross section, a double circular shape, a hollow circular structure, a sheath-core type or an island-in-sea type structure, the diameter is 38 to 175 μm. When the structure of the wig fiber is elliptical, the diameter refers to the major or minor axis. When the wig fiber has a triangular, rectangular, square or diamond structure, the side length is 40-110 μm. Of course, the sides of the triangle and rectangle may be the same or different.

In one embodiment of the present invention, the wig fiber has a diameter or side length of 40-125 μm, 60-175 μm, 40-125 μm, 40-110 μm, 50-135 μm, 45-130 μm, 38-125 μm, 42-120 μm, 40-130 μm or 45-135 μm.

Preferably, the wig fiber is a crimped fiber or an uncrimped fiber.

Preferably, the wig fiber further comprises an additive, including but not limited to one or a combination of two or more of a coloring agent, a flame retardant, a heat stabilizer, a light stabilizer, an antioxidant, an antistatic agent, a plasticizer, an ultraviolet absorber, a crystal nucleating agent, or a fluorescent enhanced whitening agent. Wherein the coloring agent comprises, but is not limited to, toner, pigment or color master batch.

In one embodiment of the present invention, the wig fiber comprises a base material, an auxiliary material and an additive.

In one embodiment of the present invention, the wig fiber comprises a base material and an auxiliary material, wherein the auxiliary material comprises one or more than two of PLA, regenerated cellulose, alginate fiber, soy protein, PVC, PAN, PBAT, PBS, PBA, PBT, PPC, PA6, PA66, PET, PP, carbon fiber, aramid 1313 and aramid 1414.

The wig fiber has good inhibition effect on staphylococcus aureus, escherichia coli, klebsiella pneumoniae and the like, has good antibacterial property and is easy to dye.

In a second aspect, there is provided a method for preparing the wig fiber described above, the preparation method comprising melt spinning, wet spinning or dry spinning.

Preferably, the preparation method comprises melt spinning, wet spinning or dry spinning the substrate.

Further preferably, the preparation method comprises mixing the base material and the auxiliary material for melt spinning, wet spinning or dry spinning.

Still more preferably, the method further comprises the step of adding an additive.

Further preferably, the preparation method comprises mixing the base material, the auxiliary material and the additive for melt spinning, wet spinning or dry spinning.

Preferably, the melt spinning temperature is 115-185 ℃, 120-180 ℃, 115-175 ℃, 115-170 ℃, 110-185 ℃, 120-175 ℃, 125-180 ℃ or 120-185 ℃.

Preferably, the melt spinning speed is 80-510m/min, 160-320m/min, 120-360m/min, 210-510m/min, 150-250m/min, 160-400m/min, 110-210m/min or 80-240m/min.

Preferably, the melt spinning draw ratio is 2.5-4, 3-4 or 2.5-3.5.

Preferably, the preparation method further comprises a hair product manufacturing process.

In a third aspect, there is provided the use of the wig fiber described above for the preparation of hair-like products, examples of hair-like products including wigs, hair pieces, false eyelashes, false beards or any artificial hair-like product such as hair for doll production.

The abbreviations and full scale controls of the present invention are shown in Table 1.

Table 1: abbreviation and full scale control

English abbreviations	Chinese holonomic scale
		PHA	Polyhydroxyalkanoate
PHB	Poly-3-hydroxybutyrate
		PHV	Poly-3-hydroxyvalerate
P3HP	Poly-3-hydroxy propionate
		PHO	Poly-3-hydroxyoctanoate
PHN	Poly-3-hydroxynonanoic acid ester
		PHBV	Copolymers of 3-hydroxybutyric acid and 3-hydroxyvaleric acid
P3HB4HB	Copolymers of 3-hydroxybutyric acid and 4-hydroxybutyric acid
		PHBHHx	Copolymers of 3-hydroxybutyric acid and 3-hydroxycaproic acid
PBAT	Poly (butylene adipate/terephthalate)
		PBS	Polybutylene succinate
PBA	Polybutylene adipate
		PBT	Polybutylene terephthalate
PLA	Polylactic acid
		PPC	Poly (propylene carbonate)
PVC	Polyvinyl chloride
		PAN	Polyacrylonitrile
PA6	Nylon 6, polyamide 6
		PA66	Polyhexamethylene adipamide, nylon 66, polyamide 66
PET	Polyester
		PP	Polypropylene

The beneficial effects are that:

1. the anti-mite agent has good antibacterial property and good hand feeling without adding an antibacterial agent and a smoothing agent. And wig fiber of this application has skin-friendly characteristic, and the biocompatibility is splendid, consequently does not have bad experiences such as pruritus, stinging, burning sensation, allergy, dryness, static, airtight when the user wears the wig, compares in traditional chemical fibre class wig, uses the travelling comfort to improve greatly, uses to experience more to be close to the human hair.

2. The wig fiber main component is degradable, and the PHA ratio is maximum, so that even if other degradable materials exist, the degradation environment requirement is obviously reduced, and the degradation speed is greatly improved. In addition, the usage amount of the non-degradable material can be greatly reduced by blending and spinning with the petroleum-based material, and the environment-friendly and sustainable effects are achieved.

3. The PHA is used as a base material, the problem of shortage of raw materials of human hair, animal hair and the like is avoided, the economical efficiency and the good use experience are realized, and the PHA wig can completely replace pure chemical fiber wigs and innovate the wig industry.

4. The invention utilizes PHA as a substrate to prepare wig fibers, which can have a skin-core or sea-island structure, mimicking the hierarchical structure of human hair. The human hair consists of a cuticle scale layer, a main body cortex layer and a central medulla layer, and the wig is mainly made up of two layers by scale stripping treatment such as acid washing. The PHA wig fiber can fully imitate human hair through the composite fiber structure, and is close to the human hair in a microscopic layer, and can also have the characteristics of other blending materials in each layer, so that the PHA wig is flexible and tough in the whole body, and the hollow structure of the human hair can be imitated through the special-shaped fiber, thereby further reducing the gram weight of the PHA fiber and enabling the final PHA wig to be lighter, thinner and more comfortable.

5. The wig fiber can be pre-dyed by adding the color master batch, so that the steps of pickling, bleaching and dyeing and the like of pretreatment in the traditional hair product technology are saved, the manpower and material resources are saved, and the pollution caused by bleaching and dyeing the PHA wig fiber is reduced. In addition, the wig fiber of the application is excellent in dyeing property, can be dyed again in the subsequent use process, and has obvious positive effects on recycling the wig and improving the use experience of the wig.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention, and it is apparent that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

Test methods used in the examples

1. Strength of

Monofilament breaking strength: according to GB/T13835.5 section 5 of the rabbit hair fibre test method: the test was carried out as described in the "strength at break and elongation at break" and the calculation of the results was carried out as described in "9.1".

Filament breaking strength after crimping: selecting shaped hair-straightening wig fiber bundles (about 300 wig fiber bundles with uniform fineness), making into curls according to the shaping process requirement, and extracting 100 wig fibers from the curls after 24 hours according to the section 5 of the GB/T13835.5 rabbit hair fiber test method: the method in the single fiber breaking strength and breaking elongation is used for testing the single fiber breaking strength.

2. Subjective evaluations included softness, smoothness (straight hair, curly hair, respectively), puffiness, gloss, skin-friendly.

Two classes of people were selected as subjects using subjective assessment.

One class consisted of 10 experts or experienced subjects, with a weight of 1. The staff is familiar with scales and description words adopted in subjective tests, human body feeling corresponding to each level in the terms is defined, the performance of wig fibers can be rapidly and accurately assessed and quantified, and the staff is first-line staff or hair product fiber material research staff with continuous working experience of hair product enterprises for more than three years;

The other class consisted of 10 consumers with simple training, weighing 0.5. Before experiments, the subjects need to carry out fiber performance related knowledge and evaluation scale term interpretation so that the performance of wig fibers can be accurately evaluated, and the rigor of the results is ensured.

Experimental conditions: the temperature is 20+/-2 ℃, the relative humidity is 65+/-2%, and the wind speed is less than or equal to 0.1m/s.

Each performance evaluation scale and description vocabulary are shown in tables 2-6.

Table 2: flexibility subjective evaluation scale

Table 3: smooth subjective evaluation scale

Table 4: subjective evaluation scale for fluffiness

Table 5: subjective evaluation scale for glossiness

Table 6: subjective evaluation scale for skin-friendly performance

3. Curl fastness: refers to the property of the curled fiber that the curled shape remains unchanged when subjected to an external force. The index of the reaction curl fastness is expressed by adopting a plastic deformation rate, namely, after the fiber is repeatedly loaded and unloaded, the percentage of the change of the curl length to the fiber length is:

plastic deformation rate after first loading and unloading

Wherein: l (L) ₀ -the length (mm) of the natural overhang of the fibre;

L ₁ -the first time the fibre is in a loaded stateUnloading after holding for 30min, and recovering for 2min to naturally overhang length (mm).

Plastic deformation rate after the second loading and unloading

Wherein: l (L) ₂ -unloading after the fiber is kept under load for 30min for the second time, and recovering for 2min the naturally hanging length (mm).

And so on, the plastic deformation rate after the nth loading and unloading

Wherein: l (L) _n -unloading after the nth fiber is kept under load for 30min, and recovering for 2min to naturally hang down for a length (mm).

For more comprehensive characterization of curl fastness of curls when subjected to external force in the use, this patent simulates three kinds of wig fiber atress models, namely:

(1) the loading and unloading load function simulates the hand touch or hand pulling and the like during use, and the specific method comprises the following steps:

extracting the shaped single wig fiber, and measuring the natural overhang length L ₀ Then a constant load (3.67 g) is applied to the wig fiber, the wig fiber is unloaded after 30min and restored for 2min, and the length L of the wig fiber after one-time loading and unloading is measured ₁ . Repeating the loading and unloading processes, and sequentially measuring the lengths L of the wig fibers after being loaded and unloaded for a plurality of times ₂ ，L ₃ ，L ₄ ，L ₅ ，L ₆ ，L ₇ Calculating the plastic deformation rate of the wig fiber according to a formula, and taking an average value of 5 wig fibers as a result;

(2) carding (30 times is a period), which simulates the carding of wig when in use, and the specific method is as follows:

selecting shaped wig fiber bundles (about 300 pieces), and measuring natural overhang length L ₀ Then comb is used to separate the wig fiber bundleUniformly and slowly carding (10-20 cm/s) from the end to the lower end, carding the wig fiber bundles for 7 periods according to the experiment requirement, 30 times per period, and 2 hours of period interval, wherein the length of the wig fiber bundles is measured and recorded after 15 minutes of carding per period, and is respectively L ₁ 、L ₂ 、L ₃ 、L ₄ 、L ₅ 、L ₆ 、L ₇ Calculating the plastic deformation rate of the fibers according to a formula, and taking an average value of 5 bundles of wig fiber bundles as a result;

(3) the water washing function simulates the water washing of wigs when in use, and the specific method comprises the following steps:

selecting shaped wig fiber bundles (about 300 pieces), and measuring natural overhang length L ₀ The wig fiber bundles are gently swung in a constant-temperature water bath kettle and cannot be rubbed, so that the uniformity of the wig fiber bundles is ensured. The water washing temperature is set to be 30 ℃ and the water washing time is set to be 20min. Washing wig fiber bundles with water for 1 time, 2 times, 3 times, 4 times, 5 times, 6 times, and 7 times according to the experiment requirement, horizontally placing in a baking oven at 40deg.C, drying for 2 hr, taking out, measuring and recording wig fiber bundle length, and respectively marking as L ₁ 、L ₂ 、L ₃ 、 L ₄ 、L ₅ 、L ₆ 、L ₇ And calculating the plastic deformation rate of the fibers according to a formula, and taking an average value of 5 wig fiber bundles as a result. Then:

when L _i (i=1, 2, … …, 7) is not less than 4%, and the curl fastness is poor;

when L _i (i=1, 2, … …, 7) all < 4%, but there is no less than 3.25%, judging that the curl fastness is poor;

When L _i (i=1, 2, … …, 7) all < 3.25%, but there is no less than 2.5%, judging that the curl fastness is general;

when L _i (i=1, 2, … …, 7) are all < 2.5%, but are more than or equal to 1.75%, and the curl fastness is judged to be good;

when L _i (i=1, 2, … …, 7) are all < 1.75%, and it is judged that the curl fastness is excellent.

4. Combing resistance: the wig can adapt to the scene of frequent carding, and after the carding is damaged, the wig is reprocessed or ironed by the electric splint again, so that the property of the damaged part of the wig can be recovered.

The specific evaluation method comprises the following steps: selecting 3 shaped wig fiber bundles (about 300 per bundle), and counting total hair number A ₀ Number of damaged hair D ₀ Then combing the wig fiber bundles uniformly (20-40 cm/s) from the upper end to the lower end by a comb, combing the wig fiber bundles for 10 periods according to the experiment requirement, wherein each period is 50 times, the period interval is 2h, counting is started for 15min after each period of combing, and the total hair number and the damaged hair number are recorded and are respectively A ₁ ～A ₁₀ 、D ₁ ～D ₁₀ . Then:

d with 2 or 3 wig fiber bundles _i /A _i (i=1, 2, … …, 10) is present at 5% or more, or D _i /D _i-1 When the content of the fibers is less than or equal to 95%, judging that the comb resistance of the wig fibers is not qualified;

d with 2 wig fiber bundles _i /A _i (i=1, 2, … …, 10) are all < 5%, and D _i /D _i-1 When the total weight is more than 95%, the method can judge that the carding resistance of the wig fibers is qualified;

when 3 bundles of wig fiber bundles D _i /A _i (i=1, 2, … …, 10) are all < 5%, and D _i /D _i-1 When the total weight of the wig fibers is more than 95%, judging that the carding resistance of the wig fibers is good;

for a well-determined wig fiber bundle, the fiber bundle is reprocessed or ironed with an electric splint, if the number of damaged hair strands is recovered > 0.5D ₁₀ It was determined that the wig fiber was excellent in comb resistance.

5. Antistatic properties: the resistance of the fiber bundle was evaluated by mass specific resistance, which means the resistance of the fiber bundle having a current passing length of 1cm and a mass of 1g, and the result was an average of 5 samples by using an LFY-405 type fiber specific resistance meter.

6. Air permeability: the test was carried out according to the method of GB/T40357-2021 determination of air permeability of hairpiece for hair products, taking an average of at least 5.

7. Flame retardancy: the flame retardance is characterized by limiting oxygen index, and the flame retardance is tested according to the method in FZ/T50017-2011 oxygen index method of flame retardance test method of polyester fiber.

8. High temperature resistance: the high temperature resistance was evaluated by the strength of the filaments at high temperature (150 ℃).

9. Antibacterial properties: evaluation of antimicrobial Properties of textiles according to GB/T20944.3-2008, section 3: the method in the oscillation method is tested to obtain the antibacterial rate to staphylococcus aureus and escherichia coli.

10. Peculiar smell: the method of GB/T23170-2019, wig cover and headwear for hair products, 5.3.3, was tested.

11. Mite resistance: the repellent rate test is carried out according to the repellent method in GB/T24259-2009 evaluation of the anti-mite performance of functional fibers.

12. Density (portability): the density was measured by a drain volume method, namely, about 10 ten thousand wig fibers were completely immersed in a graduated water tank, the volume V of the rise of the water surface was observed and recorded, and the mass of the wig fibers was recorded as m, and the density ρ=m/V.

13. Overhang fastness: refers to the property that the hair straightening fiber can immediately recover the hair straightening shape and keep draping after being acted by external force. The index of the reaction drape fastness is also expressed by the plastic deformation rate, namely the percentage of the change of the curl length to the fiber length after the fiber is repeatedly loaded and unloaded, and the following steps are carried out:

plastic deformation rate after first loading and unloading

Wherein: l (L) ₀ -the length (mm) of the natural overhang of the fibre;

L ₁ -the fiber is unloaded after being first kept in a curled or bent state for 30min under external force, immediately taken out after being immersed in water for 30s and restored to a naturally hanging length (mm) after 2 min.

Plastic deformation rate after the second loading and unloading

Wherein: l (L) ₂ -fiber second Unloading after 30min of external force curling or bending state, taking out immediately after 30s of immersing in water and recovering for 2min, and naturally hanging for length (mm).

And so on, the plastic deformation rate after the nth loading and unloading

Wherein: l (L) _n -unloading after the nth time of fiber is kept for 30min under the state of external force curling or bending, taking out immediately after being immersed in water for 30s and recovering the length (mm) naturally hanging after 2 min.

For more comprehensive characterization of the overhang fastness of hair straightening when subjected to external force in the use process, this patent simulates two kinds of wig fiber stress models, namely:

(1) the loading and unloading load function simulates bending and the like during use, and the specific method comprises the following steps:

extracting the shaped single wig fiber, and measuring the natural overhang length L ₀ Then a constant load (7.35 g) is applied to the middle part of the wig fiber (the two ends are fixed at the points within 2mm apart), unloading is carried out after 30min, the wig fiber is immediately taken out and restored for 2min after being immersed in water for 30s, and then the length L of the wig fiber after one-time loading and unloading is measured ₁ . Repeating the loading and unloading processes, and sequentially measuring the lengths L of the wig fibers after being loaded and unloaded for a plurality of times ₂ ，L ₃ ，L ₄ ，L ₅ ，L ₆ ，L ₇ And calculating the plastic deformation rate of the wig fiber according to a formula, and taking an average value of 5 wig fibers as a result.

(2) The method for simulating the curling of the wig during use by loading and unloading the curling effect comprises the following specific steps:

selecting a single shaped wig fiber, and measuring the natural overhang length L of the wig fiber ₀ Then tightly winding the wig fiber on a metal rod with the diameter of 5mm, loading a constant load (7.35 g) at two ends, unloading after 30min, immediately taking out and recovering for 2min after immersing in water for 30s, and measuring the length L of the wig fiber after one-time loading and unloading ₁ . Repeating the loading and unloading processes, and sequentially measuring wig fibers for several timesLength L after loading ₂ ，L ₃ ，L ₄ ，L ₅ ，L ₆ ，L ₇ And calculating the plastic deformation rate of the wig fiber according to a formula, and taking an average value of 5 wig fibers as a result.

Then:

when L _i (i=1, 2, … …, 7) is less than or equal to-8%, and the draping fastness is poor;

when L _i (i=1, 2, … …, 7) are each > -8%, but less than or equal to-6.5% are present, and poor draping fastness is judged;

when L _i (i=1, 2, … …, 7) are each > -6.5%, but less than or equal to-5% are present, and the draping fastness is judged to be general;

when Li (i=1, 2, … …, 7) is > -5%, but less than or equal to-3.5%, judging that the overhang fastness is good;

when Li (i=1, 2, … …, 7) was each > -3.5%, it was determined that the draping fastness was excellent.

14. Dyeing/fading effects: refers to the property that the color change degree is uniform and consistent after the same batch of false hair fibers are faded or dyed under the same condition.

The specific evaluation method comprises the following steps: 3 shaped black hair-straightening wig fiber bundles (about 1000 hair-straightening wig fiber bundles with uniform fineness) are selected, the color is faded or dyed according to the dyeing process requirement, whether the fading or dyeing change degree is uniform or not is scored, and the score is averaged. Two types of people (10 each) as in "2, subjective evaluation" were selected as subjects. The scale of evaluation of dyeing/fading effect and the vocabulary of description are shown in Table 7.

Table 7: dyeing/fading effect evaluation scale

15. Repeat staining durability: means that the wig fiber can fade and dye; and the same batch of false hair fibers have the property of uniform and consistent color change degree after being subjected to multiple fading or dyeing under the same condition.

The specific evaluation method comprises the following steps: 3 shaped black hair-straightening wig fiber bundles (about 1000 hair-straightening wig fiber bundles with uniform fineness) are selected, the hair is firstly decolorized according to the requirement of a hair dyeing process, dyeing is carried out after 72 hours, a dyeing period is calculated, 3 repeated dyeing periods (different colors dyed in each period) are carried out, and the decolorization and dyeing effects are evaluated according to the scale of the table 7 after each period is finished. Then:

when 3 periodic dyeing is uniform for each wig fiber bundle (namely, each wig fiber bundle has a periodic dyeing effect less than 4 minutes), the repeated dyeing durability of the wig fibers is not qualified;

When 3 periodic dyeing of 1 bundle or 2 bundles of wig fiber bundles are uniform (namely, 3 periodic dyeing effects of 1 bundle or 2 bundles of wig fiber bundles are all more than or equal to 4 minutes), the repeated dyeing durability of the wig fiber is qualified;

when 3 periodic dyeing of 3 bundles of wig fiber bundles is uniform (namely, 3 periodic dyeing effects of 3 bundles of wig fiber bundles are all more than or equal to 4 minutes), repeated dyeing durability of wig fiber is good;

when 3 periodic dyeing of 3 bundles of wig fiber bundles are uniform, and 3 periodic fading is also uniform (namely, 3 periodic dyeing of 3 bundles of wig fiber bundles has fading effect not less than 4 minutes), the repeated dyeing durability of wig fiber is excellent.

16. Degradation rate after discarding: referring to the test method of the biodegradability in EN 13432, wig fiber bundles (more than 1000) obtained in the corresponding examples and the control examples are finally converted into water, carbon dioxide and minerals in proportion to the total mass of the degradable components after 6 months under aerobic composting conditions.

Example 1

PHB was used with P3HB4HB (4 HB molar content 5-20%) at 1.2:1 mass ratio, and preparing wig.

Melt spinning is adopted, the spinning temperature is 120-180 ℃, the spinning speed is 160-320 m/min, the stretching ratio is 3-4, and the obtained wig fiber and wig scalp filament adopt a conventional circular cross-section structure, and the average diameter is 40-125 mu m.

The obtained wig is suitable for application with higher requirement on the hair straightening durability of the wig, and has the advantages of excellent suspension fastness, soft and smooth hand feeling, good shape recovery, easy dyeing again in the follow-up process and high degradation speed after abandoning.

In addition, experiments prove that the wig is prepared by blending PHB and P3HB4HB (the molar content of 4HB is 5-20%) according to the mass ratio of 1:3-5:1 by the same method, and the wig is still suitable for the application with higher requirement on the straight hair durability of the wig, has excellent suspension fastness, soft and smooth hand feeling, good shape recovery, easy subsequent dyeing again and quick degradation speed after abandoning.

Example 2

PHB and PHBHHx (molar content of HHx 3-25%) were used at 1.2:1 mass ratio, and preparing wig.

Melt spinning is adopted, the spinning temperature is 115-175 ℃, the spinning speed is 160-320 m/min, the stretching ratio is 2.5-3.5, and the obtained wig fiber and wig scalp filament adopt a double-circular cross-section structure, and the average diameter is 60-175 mu m.

The obtained wig is suitable for application with higher requirement on the hair curling durability of the wig, the wig is uniformly curled, the hand feeling is soft, the curling durability (curling fastness) is excellent, the wig is easy to dye again in the follow-up process, and the degradation speed is high after being abandoned.

In addition, experiments prove that the wig prepared by the method is still suitable for the application with higher requirement on the hair curling durability of the wig by blending PHB and PHBHHx (the molar content of HHX is 3-25%) in a mass ratio of 1:3-5:1, and the wig is uniform in curling, soft in hand feeling, excellent in curling durability (curling fastness), easy to dye again in the follow-up process and high in degradation speed after being abandoned.

Example 3

PHB and PHBV (3 HV molar content 2-30%) were used at 1.4:1 mass ratio, and preparing wig.

Melt spinning is adopted, the spinning temperature is 115-170 ℃, the spinning speed is 120-360 m/min, the stretching ratio is 2.5-4, and the obtained wig fiber and wig scalp filament adopt hollow circular cross-section structures, and the average diameter is 45-135 mu m.

The obtained wig is suitable for application with higher requirements on the portability (low density) of the wig, has good suspension fastness, soft and smooth hand feeling, light wearing experience, easy subsequent dyeing again and quick degradation speed after abandoning.

In addition, experiments prove that the wig prepared by the method is still suitable for the application with higher requirements on the portability (low density) of the wig by blending PHB and PHBV (3 HV molar content of 2-30%) in a mass ratio of 1:2-5:1, has good suspension fastness, soft and smooth hand feeling, light wearing experience, easy subsequent dyeing again and quick degradation speed after abandoning.

Example 4

PHB, P3HP, P3HB4HB (4 HB molar content 3-25%) or PHBHHx (HHX molar content 3-25%) was used with PLA at 1.2:1 mass ratio, and preparing wig.

Melt spinning is adopted, the spinning temperature is 110-185 ℃, the spinning speed is 210-510 m/min, the stretching ratio is 3-4, and the obtained wig fiber and wig scalp filament adopt diamond sections, and the average side length is 40-110 mu m.

The obtained wig is suitable for application with higher requirements on the flexibility of the wig, has good suspension fastness, soft and smooth hand feeling, has no dry-stop feeling in carding experience, is easy to dye again in the follow-up process, and has high degradation speed after being abandoned.

In addition, experiments prove that the wig is prepared by blending PHB, P3HP, P3HB4HB (the molar content of 4HB is 3-25%) or PHBHHx (the molar content of HHX is 3-25%) with PLA according to the mass ratio of 1:3-5:1, the wig is still suitable for the application with higher requirements on the flexibility of the wig, the wig has good suspension fastness, soft and smooth hand feeling, no dry stop feeling in carding experience, easy re-dyeing in the follow-up process and quick degradation speed after discarding.

Example 5

Blends of PHB, P3HP, P3HB4HB (4 HB mole content 3-25%) or PHBHHx (HHX mole content 3-25%) and any ratio thereof (wherein 20% or less PHB mass content 40%,5% or less P3HB4HB (4 HB mole content 3-40%). Or less 30%) were used as skin layers, and blends of any ratio of the above PHA materials were reused with PVC or PAN at 2: 3 mass ratio blending as a core layer.

The wig fiber and the wig scalp yarn are obtained by wet spinning, and the average diameter of the wig fiber and the wig scalp yarn is 50-135 mu m.

The obtained wig is suitable for application with higher requirement on the bulkiness of the wig, and has soft and fluffy hand feeling, fine and compact curl, good curl fastness, easy dyeing again in the follow-up process and quick degradation speed after abandoned.

In addition, experiments prove that the wig is still suitable for the application with higher requirement on the fluffiness of the wig, has soft and fluffy hand feeling, fine curl, good curl fastness, is easy to dye again later and has very fast degradation speed after being abandoned by taking PHB, P3HP, P3HB4HB (the molar content of 4HB is 3-25%) or PHBHHx (the molar content of HHX is 3-25%) and the blend of any proportion of the PHB, the P3HP, the P3HB4HB and any proportion of the PHBHHx as the skin layers and taking the blend of any proportion of the PHA material and PVC or PAN as the core layer.

Example 6

Using any known mixture of PHA (wherein 20% or less of PHB mass content is 40% or less, 5% or less of P3HB4HB (4 HB molar content 3-40%) or less is 30%) with PLA at a ratio of 1.3:1 as a sea component, and then blending the mixture of PHA with PBAT in a mass ratio of 1:1.6 mass ratio blending as island component wigs were prepared.

Melt spinning is adopted, the spinning temperature of sea component is 120-175 ℃, the spinning temperature of island component is 115-170 ℃, the spinning speed is 150-250 m/min, the stretching ratio is 2.5-3.5, and the obtained wig fiber and wig scalp filament adopt sea-island structure, and the average diameter is 45-130 mu m.

The obtained wig is suitable for application with higher requirements on the glossiness of the wig, the hand feeling of the wig is soft and smooth, the glossiness is close to that of human hair, the draping fastness is good, the wig is easy to dye again in the follow-up process, and the degradation speed is high after being abandoned.

In addition, experiments prove that the wig is prepared by using any known PHA mixture (wherein the mass content of PHB is less than or equal to 20 percent and less than or equal to 40 percent, the mass ratio of P3HB4HB (4 HB mole content is 3-40 percent) is less than or equal to 30 percent) and PLA to be blended with the PHA mixture in the mass ratio of 1:3-5:3 as sea components, and then the PHA mixture and PBAT are blended with the PHA mixture in the mass ratio of 1:2-5:6 as island components, so that the wig is still suitable for the application with higher requirements on the glossiness of the wig, the hand feeling of the wig is soft and smooth, the glossiness is close to that of human hair, the overhang fastness is good, the subsequent dyeing is easy, and the degradation speed after abandoning is very fast.

Example 7

Using any known mixture of PHAs, wherein 20% or less of PHB mass content is 40% or less, 5% or less of P3HB4HB (4 HB molar content 3-40%) or less is 30%, with regenerated cellulose at a ratio of 1:1 mass ratio, and preparing wig.

The wig fiber and the wig scalp yarn obtained by wet spinning have a conventional circular cross-section structure, and the average diameter of the wig fiber and the wig scalp yarn is 40-110 mu m.

The wig is suitable for application with higher requirement on the air permeability of the wig, has soft and smooth hand feeling, good overhang fastness, comfortable wearing experience, ventilation, easy dyeing after subsequent steps, and quick degradation speed after abandoned.

In addition, experiments prove that the wig is prepared by blending any known mixture of PHA (wherein the mass content of PHB is more than or equal to 20% and less than or equal to 40%, the mass content of P3HB4HB (the molar content of 4HB is 3-40%) and less than or equal to 30% with regenerated cellulose according to the mass ratio of 1:3-7:2, and the wig is still suitable for the application with higher requirement on the air permeability of the wig, has soft and smooth hand feeling, good draping fastness, comfortable wearing experience, air permeability, easy secondary dyeing and quick degradation speed after abandoning.

Example 8

Using any known mixture of PHAs, wherein 20% or less of PHB mass content is 40% or less, 5% or less of P3HB4HB (4 HB molar content 3-40%) or less is 30%, with seaweed fiber at a ratio of 1:1.2 mass ratio blending to prepare wig.

Melt spinning is adopted, the spinning temperature is 115-175 ℃, the spinning speed is 160-400 m/min, the stretching ratio is 3-4, and the obtained wig fiber and wig scalp filament adopt a conventional circular cross-section structure, and the average diameter is 38-125 mu m.

The obtained wig is suitable for application with higher requirement on the antibacterial property of the wig, and has soft and smooth hand feeling, good overhang fastness, comfortable wearing experience, no peculiar smell and itching feeling, easy subsequent dyeing again and quick degradation speed after abandoning.

In addition, experiments prove that the wig prepared by the method is still suitable for application with higher requirements on the antibacterial property of the wig by blending any known PHA mixture (wherein the mass content of PHB is more than or equal to 20% and less than or equal to 40%, the mass content of P3HB4HB is more than or equal to 5% and less than or equal to 30% and the molar content of 4HB is more than or equal to 3:2:1-1, and the wig has the advantages of soft hand feel, smoothness, good suspension fastness, comfortable wearing experience, no peculiar smell and itching feeling, easy re-dyeing, and quick degradation speed after abandoning.

Example 9

Blends of any known PHA (wherein 20% or less of PHB mass content is 40% or less, 5% or less of P3HB4HB (4 HB molar content 3-40%) is 30% or less) with PBS, PPC, PA6, PA66, PET or PP in any ratio of 1:1 mass ratio, and preparing wig.

The wig fiber or the wig scalp yarn is obtained by melt spinning or dry spinning, and the obtained wig fiber or the wig scalp yarn adopts a conventional circular cross-section structure, and the average diameter of the wig fiber or the wig scalp yarn is 42-120 mu m.

The obtained wig is suitable for application with higher requirements on the strength and carding resistance of the wig, the hand feeling of the wig is soft and smooth, the overhang fastness is good, the phenomena of broken hair and falling off are fewer, the wig is easy to dye again in the follow-up process, and the degradation speed is very high after being abandoned.

In addition, experiments prove that the wig is prepared by blending any known PHA mixture (wherein the mass content of PHB is less than or equal to 20 percent and less than or equal to 40 percent, the mass content of P3HB4HB (the molar content of 4HB is 3-40 percent) is less than or equal to 30 percent) with PBS, PPC, PA, PA66, PET or PP and the blend of the PHA mixture and the PA66, PET or PP in any proportion according to the mass ratio of 5:2-3:8, the wig is still suitable for the application with higher requirements on the strength and the carding resistance of the wig, the hand feeling of the wig is soft and smooth, the overhang fastness is good, the phenomena of breakage and falling off are less, the wig is easy to dye again later, and the degradation speed after being abandoned is very fast.

Example 10

Using any known mixture of PHAs, wherein 20% or less of PHB mass content is 40% or less, 5% or less of P3HB4HB (4 HB molar content 3-40%) or less, 30% or less, with carbon fiber at a ratio of 1:1.2 mass ratio blending to prepare wig.

Melt spinning is adopted, the spinning temperature is 125-180 ℃, the spinning speed is 110-210 m/min, the stretching ratio is 2.5-3.5, and the obtained wig fiber and wig scalp filament adopt a conventional circular cross-section structure, and the average diameter is 40-125 mu m.

The obtained wig is suitable for application with higher requirements on antistatic property of the wig, and has soft and smooth hand feeling, good overhang fastness, comfortable wearing experience, no static electricity and burning feeling, easy subsequent dyeing again and quick degradation speed after abandoning.

In addition, experiments prove that the wig prepared by the method is still suitable for application with higher requirements on antistatic property of the wig by blending any known mixture of PHA (wherein the mass content of PHB is more than or equal to 20% and less than or equal to 40%, the mass content of P3HB4HB is more than or equal to 5% and less than or equal to 30% and the molar content of 4HB is more than or equal to 3:2:1, and the wig is soft and smooth in hand feeling, good in suspension fastness, comfortable in wearing experience, free of static electricity and burning feeling, easy to dye again later and quick in degradation speed after abandoning.

Example 11

Using any known mixture of PHAs, wherein 20% or less of PHB mass content is 40% or less, 5% or less of P3HB4HB (4 HB molar content 3-40%) or less is 30%, with soybean protein at 1:1 mass ratio, and preparing wig.

The wig fiber and the wig scalp yarn obtained by wet spinning adopt a conventional circular cross-section structure, and the average diameter of the wig fiber and the wig scalp yarn is 40-130 mu m.

The obtained wig is suitable for application with higher requirements on skin-friendly performance of the wig, has soft and smooth hand feeling, good overhang fastness, comfortable wearing experience, no allergy, itching, stinging, burning feeling and the like, is easy to dye again in the follow-up process, and has high degradation speed after being abandoned.

In addition, experiments prove that the wig is prepared by blending any known PHA mixture (wherein the mass content of PHB is more than or equal to 20% and less than or equal to 40%, the mass content of P3HB4HB (the molar content of 4HB is 3-40%) and less than or equal to 30% with soybean protein according to the mass ratio of 3:1-2:5, and the wig is still suitable for application with higher requirements on skin affinity of the wig, has soft and smooth hand feeling, good suspension fastness, comfortable wearing experience, no allergy, itching, stinging, burning sensation and the like, is easy to dye again in the follow-up process, and has a fast degradation speed after abandoning.

Example 12

Using any known mixture of PHA (wherein 20% or less of PHB mass content is 40% or less, 5% or less of P3HB4HB (4 HB mole content 3-40%) or less of 30%), with aramid 1313 or aramid 1414, and their mixture in any ratio of 4.7: 1. is blended to prepare the wig.

Melt spinning is adopted, the spinning temperature is 120-185 ℃, the spinning speed is 80-240 m/min, the stretching ratio is 2.5-3.5, and the obtained wig fiber and wig scalp filament adopt a conventional circular cross-section structure, and the average diameter is 45-135 mu m.

The obtained wig is suitable for application with higher high-temperature resistance requirement on the wig, has soft and smooth hand feeling, good overhang fastness, is easy to dye again in the follow-up process, has high-temperature resistance of more than 150 ℃, has good flame retardance and is quick in degradation speed after being abandoned.

In addition, experiments prove that the wig is prepared by blending any known PHA mixture (wherein the mass content of PHB is less than or equal to 20 percent and less than or equal to 40 percent, the mass content of P3HB4HB is less than or equal to 5 percent and less than or equal to 30 percent (the molar content of 4HB is 3-40 percent) with aramid fiber 1313 or aramid fiber 1414 and the mixture of any proportion of the aramid fiber 1414 according to the mass ratio of 10:1-3:1, the wig is still suitable for the application with higher requirements on high temperature resistance of the wig, the wig has soft and smooth hand feeling, good suspension fastness, is easy to dye again later, has good flame retardance and has high degradation speed after being abandoned.

In the following comparative examples, PHA was not used as a base material in comparison with the same number examples (comparative examples 1 to 12); or the comparison examples are different from the materials used in the corresponding examples in the proportion or the spinning process (comparison examples 13 to 24).

Comparative example 1

And (3) blending PLA and PBAT in a mass ratio of 2:3-3:2 to prepare the wig.

Melt spinning is adopted, the spinning temperature is 145-215 ℃, the spinning speed is 150-420 m/min, the stretching ratio is 3-4, and the obtained wig fiber and wig scalp filament adopt a conventional circular cross-section structure, and the average diameter is 40-125 mu m.

The obtained wig has the advantages of general suspension fastness, harder hand feeling, poor shape recovery, difficult subsequent dyeing, and high degradation speed after being abandoned.

Comparative example 2

And (3) blending PBAT and PP in a mass ratio of 2:3-3:2 to prepare the wig.

Melt spinning is adopted, the spinning temperature is 130-195 ℃, the spinning speed is 150-300 m/min, the stretching ratio is 2.5-4, and the obtained wig fiber and wig scalp filament adopt a double-circular cross-section structure, and the average diameter is 58-170 mu m.

The obtained wig is curled but uneven, has hard hand feeling, general curling durability (curling fastness), difficult dyeing in the follow-up process and high degradation speed after abandoned.

Comparative example 3

The wig is prepared by blending PP and PLA in a mass ratio of 1:2-2:1.

Melt spinning is adopted, the spinning temperature is 150-215 ℃, the spinning speed is 160-400 m/min, the stretching ratio is 3-4, and the obtained wig fiber and wig scalp filament adopt hollow circular cross-section structures, and the average diameter is 48-130 mu m.

The wig is light in wearing experience, but poor in suspension fastness, hard in handfeel, difficult to dye again in the follow-up process, and high in degradation speed after being abandoned.

Comparative example 4

And (3) blending PBAT and PLA in a mass ratio of 2:3-2:1 to prepare the wig.

Melt spinning is adopted, the spinning temperature is 145-215 ℃, the spinning speed is 180-600 m/min, the stretching ratio is 3-4, and the obtained wig fiber and wig scalp filament adopt diamond sections, and the average side length is 42-108 mu m.

The obtained wig has good suspension fastness, soft hand feeling, embrittlement phenomenon after long-time storage, difficult dyeing again later and high degradation speed after abandoning.

Comparative example 5

Wigs were prepared using PVC as the skin layer and PAN as the core layer.

The obtained wig has soft and fluffy hand feeling, finer curl and better shape recovery, but has heavy and clumsy wearing experience, is difficult to dye again later, and is not degradable after being abandoned.

Comparative example 6

Wigs were prepared using PP as the sea component and HDPE (high density polyethylene) as the island component.

The melt spinning is adopted, the spinning temperature of sea component is 160-195 ℃, the spinning temperature of island component is 135-180 ℃, the spinning speed is 160-320 m/min, the stretching ratio is 2.5-4, and the obtained wig fiber and wig scalp filament adopt sea-island structure, and the average diameter is 40-128 μm.

The obtained wig has the advantages of general glossiness (too bright compared with human hair), hard hand feeling, general suspension fastness, difficult dyeing again later, and nondegradability after being abandoned.

Comparative example 7

And (3) blending PLA and PBS in a mass ratio of 2:5-3:2 to obtain a skin layer, and blending regenerated cellulose and PBAT in a mass ratio of 2:3-5:2 to obtain a core layer to prepare the wig.

The wig fiber and the wig scalp yarn are obtained by wet spinning, and the average diameter of the wig fiber and the wig scalp yarn is 45-115 mu m.

The wig has soft hand feeling, good suspension fastness, general wearing experience air permeability, difficult subsequent dyeing, and quick degradation speed after abandoned.

Comparative example 8

The wig is prepared by blending PLA, chitosan and CMC (carboxymethyl cellulose) in a mass ratio of 5 (1-3) to 0.5-2.

Melt spinning is adopted, the spinning temperature is 135-205 ℃, the spinning speed is 180-360 m/min, the stretching ratio is 2.5-4, and the obtained wig fiber and wig scalp filament adopt a conventional circular cross-section structure, and the average diameter is 40-125 mu m.

The obtained wig has the advantages of hard hand feeling, general suspension fastness, easy re-dyeing in the follow-up process, no peculiar smell in wearing experience, slight itching feeling and high degradation speed after being abandoned.

Comparative example 9

The wig is prepared by blending PLA and PA6 in a mass ratio of 5 (2-8).

Melt spinning is adopted, the spinning temperature is 165-230 ℃, the spinning speed is 150-330 m/min, the stretching ratio is 2.5-4, and the obtained wig fiber and wig scalp filament adopt a conventional circular cross-section structure, and the average diameter is 40-115 mu m.

The obtained wig has strong hand feeling, is hard, has general overhang fastness, is easy to dye again in the follow-up process, has less phenomena of broken hair and falling off, and has high degradation speed after being abandoned.

Comparative example 10

The wig is prepared by blending PLA and PBAT with a mass ratio of 10 (3-15) to 0.5-2.

Melt spinning is adopted, the spinning temperature is 135-215 ℃, the spinning speed is 120-240 m/min, the stretching ratio is 2.5-3.5, and the obtained wig fiber and wig scalp filament adopt a conventional circular cross-section structure, and the average diameter is 40-120 mu m.

The wig has soft hand feeling, good suspension fastness, comfortable wearing experience, no static electricity and burning feeling, but slight stinging feeling, difficult dyeing again later and high degradation speed after being abandoned.

Comparative example 11

And (3) blending PLA and soybean protein in a mass ratio of 3:1-2:5 to prepare the wig.

The obtained wig has harder hand feeling, general suspension fastness, slightly glowing wearing experience, easy dyeing again in the follow-up process and high degradation speed after abandoned.

Comparative example 12

The wig is prepared by blending PBAT and aramid 1313 or aramid 1414 in a mass ratio of 10:1-3:1.

Melt spinning is adopted, the spinning temperature is 130-190 ℃, the spinning speed is 80-240 m/min, the stretching ratio is 2.5-3.5, and the obtained wig fiber and wig scalp filament adopt a conventional circular cross-section structure, and the average diameter is 42-125 mu m.

The wig has soft hand feeling, good suspension fastness, high temperature resistance of more than 150 degrees and good flame retardance, but has slightly stinging feeling in wearing experience, is difficult to dye again in the follow-up process, and has high degradation speed after being abandoned.

Comparative example 13

Wigs were prepared using PHB blended with P3HB4HB (4 HB molar content 5-20%) at a mass ratio of 1:5 or 10:1 (mass ratio different from example 1).

The obtained wig fiber has the blocking phenomenon (1:5) or is extremely brittle and has no toughness (10:1), so that the strength is poor, and other properties cannot be normally tested.

Comparative example 14

Wigs were prepared by blending PHB with PHBHHx (HHx molar content 3-25%) at a mass ratio of 1:5 or 10:1 (mass ratio different from example 2).

Comparative example 15

The PHB and PHBV (3 HV molar content 2-30%) are used for blending in a mass ratio of 1:2-5:1 to prepare the wig.

The melt spinning is adopted, the spinning temperature is 115-170 ℃, the spinning speed is 40-80 m/min, the stretching ratio is 2.5-4, the obtained wig fiber and wig scalp yarn adopt hollow round section structures, and the average diameter is 45-135 mu m (the spinning speed is different from that of the embodiment 3).

The obtained wig fiber has obvious crystallization phenomenon, has no toughness after long-term storage, and therefore has poor strength, and other properties cannot be normally tested.

Comparative example 16

Wigs were prepared by blending PHB, P3HP, P3HB4HB (4 HB molar content 3-25%) or PHBHHx (HHX molar content 3-25%) with PLA in a mass ratio of 1:3 to 5:1.

The melt spinning is adopted, the spinning temperature is 200-220 ℃, the spinning speed is 210-510 m/min, the stretching ratio is 3-4, the obtained wig fiber and wig scalp filament adopt diamond-shaped cross sections, and the average side length is 40-110 mu m (the spinning temperature is different from that of the embodiment 4).

The formed wig fiber cannot be obtained, the adhesion phenomenon is serious, and all performances cannot be normally tested.

Comparative example 17

Wigs were prepared using PHB, P3HP, P3HB4HB (4 HB mole content 3-25%) or PHBHHx (HHX mole content 3-25%) and blends thereof in any ratio as skin layers, and then blending the blend of any ratio of the above PHA materials with PVC or PAN in a mass ratio of 5:1 as core layers (mass ratio is different from that of example 5).

The obtained wig fiber has the advantages of general fluffiness, soft hand feeling, fine and compact curling, good curling fastness, easy subsequent dyeing, and quick degradation speed after abandoned.

Comparative example 18

Wigs were prepared using any known mixture of PHA (wherein 20% or less of PHB mass content is 40% or less, 5% or less of P3HB4HB (4 HB molar content 3-40%) or less) blended with PLA at a mass ratio of 1:10 as the sea component, and then blending the mixture of PHA with PBAT at a mass ratio of 3:1 as the island component (mass ratio is different from that of example 6).

The obtained wig fiber has the advantages of general glossiness (brighter than human hair), harder hand feeling, general smoothness, good suspension fastness, difficult dyeing again later, and quick degradation speed after being abandoned.

Comparative example 19

Wigs were prepared by blending with regenerated cellulose at a mass ratio of 1:10 (mass ratio different from example 7) using any known mixture of PHA wherein 20% to 40% by mass of PHB, 5% to 30% to P3HB4HB (4 HB molar content 3-40%), etc.

The obtained wig fiber has good air permeability, soft hand feeling, general smoothness, good suspension fastness, lower strength after wetting, easy dyeing again later and quick degradation speed after abandoned.

Comparative example 20

Wigs were prepared by blending any known mixture of PHA (wherein 20% or less of PHB mass content is 40% or less, 5% or less of P3HB4HB (4 HB molar content 3-40%) is 30% or less) with alginate fibers at a mass ratio of 2:1 to 1:3.

The melt spinning is adopted, the spinning temperature is 115-175 ℃, the spinning speed is 160-400 m/min, the stretching ratio is 6-8, and the obtained wig fiber and wig scalp filament adopt a conventional circular cross-section structure, and the average diameter is 25-110 mu m (the stretching ratio is different from that of the embodiment 8).

The obtained wig fiber has good antibacterial property, soft and smooth hand feeling, good suspension fastness, comfortable wearing experience, no peculiar smell and itching feeling, low strength, unqualified comb resistance and high degradation speed after being abandoned, and is easy to dye again in the follow-up process.

Comparative example 21

Wigs were prepared by blending any known mixture of PHA (wherein 20% or less of PHB mass content is 40% or less, 5% or less of P3HB4HB (4 HB mole content 3-40%) is 30% or less) with PBS, PPC, PA6, PA66, PET or PP and their blends in any ratio at a mass ratio of 5:2 to 3:8.

The obtained wig fiber or wig scalp yarn was melt-spun or dry-spun, and had a hollow round cross-sectional structure, and the average diameter was 42 to 120 μm (the cross-sectional structure was different from that of example 9).

The obtained wig fiber has soft and smooth hand feeling and good suspension fastness, but has the phenomena of broken hair and falling off, low strength, qualified comb resistance, easy dyeing again in the follow-up process and high degradation speed after being abandoned.

Comparative example 22

Wigs were prepared by blending any known mixture of PHA (wherein 20% or less of PHB mass content is 40% or less, 5% or less of P3HB4HB (4 HB molar content 3-40%) is 30% or less) with carbon fiber at a mass ratio of 10:1 (mass ratio different from that of example 10).

The obtained wig fiber has general antistatic property, soft and smooth hand feeling and good suspension fastness, but is slightly burnt after being worn for a long time, is easy to dye again later, and has quick degradation speed after being abandoned.

Comparative example 23

Wigs were prepared by blending with soy protein at a mass ratio of 1:10 (mass ratio different from example 11) using any known mixture of PHA wherein 20% to 40% by mass of PHB, 5% to 30% to P3HB4HB (4 HB mole content 3-40%), etc.

The obtained wig fiber has good skin-friendly property, soft hand feeling, general smoothness, general overhang fastness and curl fastness, comfortable wearing experience, occasional itching feeling, easy dyeing again in the follow-up process and quick degradation speed after abandoning.

Comparative example 24

Wigs were made by blending any known mixture of PHA (wherein 20% or less of PHB mass content is 40% or less, 5% or less of P3HB4HB (4 HB mole content 3-40%) is 30% or less) with either aramid 1313 or aramid 1414 and mixtures thereof in any ratio at a mass ratio of 10:1 to 3:1.

The melt spinning is adopted, the spinning temperature is 195-235 ℃, the spinning speed is 80-240 m/min, the stretching ratio is 2.5-3.5, the obtained wig fiber and wig scalp filament adopt a conventional circular cross-section structure, and the average diameter is 45-135 mu m (the spinning temperature is different compared with the example 12).

The above examples and comparative examples are summarized in table 8, and the test results of the examples and comparative examples are shown in tables 9 to 11, and the wig fiber of the present application has a better technical effect than the wig fiber produced in the prior art.

Table 8: summary of examples and comparative examples

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Table 9: test results of examples (data for the first occurrence of certain ratios and process parameters in each example only)

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Table 10: test results of the control (data for only certain defined process parameters in each control)

Table 11: test results of the control (data for only certain defined process parameters in each control)

The preferred embodiments of the present invention have been described in detail above, but the present invention is not limited to the specific details of the above embodiments, and various simple modifications can be made to the technical solution of the present invention within the scope of the technical concept of the present invention, and all the simple modifications belong to the protection scope of the present invention.

In addition, the specific features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described further.

Claims

1. A wig fiber, wherein said wig fiber comprises a substrate, and said substrate comprises PHB.

2. The wig fiber of claim 1, wherein said substrate further comprises a non-PHB PHA, preferably said non-PHB PHA comprises various homo-, random co-and block copolymers comprising 3-hydroxypropionic acid, 3-hydroxybutyric acid, 3-hydroxyvaleric acid, 3-hydroxycaproic acid, 4-hydroxybutyric acid and 5-hydroxyvaleric acid or derivatives thereof, further preferably said non-PHB PHA comprises one or a combination of two or more of PHV, P3HP, PHBV, PHO, PHN, P3HB4HB or PHBHHx.

3. Wig fiber according to claim 1 or 2, further comprising an auxiliary material, wherein the auxiliary material comprises a natural or non-natural auxiliary material, preferably, the natural auxiliary material is selected from one or more of PLA, regenerated cellulose, alginate fiber or soy protein; the non-natural auxiliary material is selected from one or more than two of PVC, PAN, PBAT, PBS, PBA, PBT, PPC, PA6, PA66, PET, PP, carbon fiber, aramid 1313 and aramid 1414;

preferably, the mass ratio of the base material to the auxiliary material is (1-10): (1-8).

4. A wig fiber according to any one of claims 1 to 3, further comprising an additive selected from one or a combination of two or more of a coloring agent, a flame retardant, a heat stabilizer, a light stabilizer, an antioxidant, an antistatic agent, a plasticizer, an ultraviolet absorber, a crystal nucleating agent, or a fluorescent enhanced whitening agent; wherein the coloring agent comprises toner, pigment or color master batch.

5. The wig fiber according to any of claims 1 to 4, wherein the structure of the wig fiber comprises a circular cross-section fiber, a shaped fiber or a composite fiber structure, wherein the cross-section structure of the shaped fiber comprises an oval, triangular, diamond, double round or hollow round structure, and the composite fiber structure comprises a side-by-side, sheath-core or islands-in-the-sea structure.

6. The wig fiber according to claim 5, wherein the wig fiber has a diameter or side length of 38-175 μm.

7. The wig fiber according to any of claims 1 to 6, wherein the wig fiber is a crimped fiber or an uncrimped fiber.

8. A method of producing a wig fiber according to any of claims 1 to 7, wherein said production method comprises melt spinning, wet spinning or dry spinning.

9. The method of claim 8, wherein the melt spinning temperature is 115-185 ℃, the melt spinning speed is 80-510m/min, and the melt spinning draw ratio is 2.5-4.

10. Use of the wig fiber according to any of claims 1 to 7 for the preparation of hair-like products, including wigs, pieces of hair, false eyelashes, false beards or hairs for doll production.