CN114775269A

CN114775269A - Anti-pilling process for cashmere product

Info

Publication number: CN114775269A
Application number: CN202210357702.XA
Authority: CN
Inventors: 王宁
Original assignee: Inner Mongolia Erite Textile Co ltd
Current assignee: Inner Mongolia Erite Textile Co ltd
Priority date: 2022-04-06
Filing date: 2022-04-06
Publication date: 2022-07-22
Anticipated expiration: 2042-04-06
Also published as: CN114775269B

Abstract

The application provides a cashmere product anti-pilling process, which comprises the steps of immersing cashmere products into buffer solution for soaking, pretreating the cashmere products, opening salt bonds among cashmere fiber keratin, facilitating the permeation of a fulling agent, adding the pretreated cashmere products into a fulling pool, and performing fulling treatment by using the fulling agent, wherein the cashmere products subjected to fulling treatment are more compact in texture, the cohesive force among cashmere fibers is increased, the hand feeling, the appearance and the color of the cashmere products are improved, and meanwhile, the cashmere products have a certain anti-pilling capability; washing and dehydrating the felted cashmere products, and then carrying out pre-pilling resistant finishing on the cashmere products by using sodium bisulfite to destroy salt bonds in cashmere fiber keratin, thereby facilitating subsequent pilling resistant finishing; and after the anti-pilling finishing of the cashmere product, carrying out post-treatment to obtain a finished product anti-pilling cashmere product. The finished anti-pilling cashmere product obtained by the process has the advantages of long service life, soft texture and good anti-pilling performance.

Description

Anti-pilling process for cashmere product

Technical Field

The application relates to the technical field of cashmere textile, in particular to an anti-pilling process for cashmere products.

Background

The cashmere is precious natural protein fiber, belongs to special fiber, has fineness of 13-16 microns, small fineness irregularity, average length of 35-40 mm, and has excellent characteristics of thinness, lightness, softness, smoothness, good heat preservation performance and the like. The knitted fabric processed by cashmere has the characteristics of plump suede, soft and smooth hand feeling, light and warm feeling, comfortable wearing and the like.

In recent years, with the continuous improvement of living standard of people, the demand of high-grade and high-quality cashmere knitted fabrics on the domestic market is increased, but the pilling problem is still not well solved, and the pilling is one of important factors influencing the hand feeling, the appearance and the wearability of the cashmere knitted fabrics, so the pilling becomes one of the headaches of the cashmere knitted fabrics currently produced, managed and consumed. So that the anti-pilling finishing of the cashmere knitted fabric is more and more attracting attention.

Disclosure of Invention

The application provides an anti-pilling process for cashmere products, which is used for solving the problem that the cashmere products are easy to pilling.

The application provides an anti-pilling process for cashmere products, which comprises the following steps:

placing the cashmere product to be treated in a buffer solution, soaking for 5-20 min at a bath ratio of 1: 15-1: 20 at normal temperature, and then centrifugally spin-drying at a rotating speed of 650-800 rpm to obtain a pretreated cashmere product;

adding the pretreated cashmere product into a milling pool, adding 0.8-2.6% o.w.f milling agent, adding clear water to adjust the bath ratio to 1: 20-1: 35, adjusting the pH value to 5-7, and milling;

placing the cashmere products after fulling treatment in a clean water tank, cleaning for 5-8 min at a stirring speed of 5-15 rpm in a bath ratio of 1: 10-1: 15, and dehydrating for 5-8 min at a rotating speed of 650-800 rpm;

adding the dehydrated cashmere product into a pre-finishing pool, and adding 2.2-3.5% o.w.f sodium bisulfite for pre-anti-pilling finishing;

and carrying out anti-pilling finishing on the cashmere product subjected to the pre-anti-pilling finishing, and carrying out post-treatment to obtain a finished anti-pilling cashmere product.

The cashmere product treated by the process has the advantages of moderate suede thickness, compact texture, soft hand feeling, long service life, good pilling resistance, and water and oil repellency.

Optionally, the buffer is disodium hydrogen phosphate-potassium dihydrogen phosphate buffer, sodium dihydrogen phosphate-sodium hydroxide buffer or disodium hydrogen phosphate-sodium dihydrogen phosphate buffer with pH of 5-7.

Optionally, the milling process comprises:

controlling the milling temperature to be 30-40 ℃, stirring speed to be 5-15 rpm, and soaking for 20-35 min to obtain a pre-milled cashmere product;

and (3) carrying out centrifugal dehydration on the pre-shrunk cashmere product for 3-5 min at the rotating speed of 600-800 rpm to obtain the shrunk cashmere product.

Optionally, the fulling agent is: one or more of a detergent 209, a detergent 105, a neutral soap powder, pancreatic plus bleach T, lauroyl diethanolamine, and 18-crown-6.

Optionally, the pre-pilling resistant finish is: adding clear water into the pre-finishing pool to adjust the bath ratio to be 1: 20-1: 25, adjusting the pH to be 6.5-7, soaking for 20-35 min at the temperature of 45-55 ℃, and centrifugally spin-drying for 3-5 min at the rotating speed of 800-950 rpm after finishing to obtain the anti-pilling finished cashmere product.

Optionally, the anti-pilling finish comprises:

adding the pre-anti-pilling finished cashmere product into a first finishing pool, adding 3-6% o.w.f of a first finishing agent, then adding clear water to adjust the bath ratio to be 1: 20-1: 25, controlling the temperature to be 45-50 ℃, soaking for 20-30 min, centrifugally spin-drying for 3-5 min at the rotating speed of 700-800 rpm after finishing, then washing for 5-10 times by using clear water according to the bath ratio of 1: 15-1: 25, and drying at low temperature in an environment with the temperature of 50-75 ℃ to obtain a first anti-pilling cashmere product;

adding the first anti-pilling cashmere product into a second finishing pool, adding 0.6-1.6% o.w.f of a second finishing agent, then adding clear water to adjust the bath ratio to be 1: 35-1: 45, controlling the temperature to be 75-85 ℃, controlling the pH to be 4-5, soaking for 1-2 h, and centrifugally spin-drying for 3-5 min at the rotating speed of 700-800 rpm after finishing, so as to obtain a second anti-pilling cashmere product;

and drying the second anti-pilling cashmere product at 65-85 ℃, and then baking for 30-90 s at 100-140 ℃ to obtain the anti-pilling finished cashmere product.

Optionally, the post-processing comprises:

adding 5-10% o.w.f. of absolute ethyl alcohol into the anti-pilling finished cashmere product, adding clear water to adjust the bath ratio to be 1: 15-1: 25, and carrying out first cleaning on the anti-pilling finished cashmere product under the conditions that the temperature is 35-45 ℃ and the pH is 7 to obtain a first cleaned cashmere product;

carrying out secondary cleaning on the cashmere product subjected to the primary cleaning by using clean water according to the conditions of bath ratio of 1: 20-1: 25, temperature of 30-40 ℃ and pH of 7, wherein the secondary cleaning can be repeated for 2-3 times to obtain the cashmere product subjected to the secondary cleaning;

and (3) centrifugally dewatering the cashmere product subjected to the secondary cleaning for 5-8 min at the rotating speed of 800-1000 rpm, and drying at 75-85 ℃ to obtain the finished anti-pilling cashmere product.

Optionally, the first finishing agent is chitosan with the viscosity of 500-1000 cP and the deacetylation degree of 85-95%.

Alternatively, the second finish is prepared according to the following process:

according to the weight portion, 22 portions of hexamethylcyclotrisiloxane, 20 portions of vinyltriethoxy siloxane, 9 portions of 1,3, 5-trimethyl-1, 3, 5-tri (3,3, 3-trifluoropropyl) cyclotrisiloxane, 0.5 portion of sodium dodecyl sulfonate, 0.8 portion of polyethylene glycol mono-4-nonylphenyl ether n which is approximately equal to 20, 5 portions of potassium hydroxide and 120 portions of water are added into a first reactor, the stirring speed is set to be 200rpm, the reaction temperature is increased from the beginning of stirring to the preset temperature of 80 ℃, and the heating rate is 5 ℃/min, so as to prepare a pre-emulsion;

preparing 0.15 part of ammonium persulfate and 20 parts of water into an initiator solution;

1/5 is taken from the pre-emulsion and the initiator solution respectively, the pre-emulsion and the initiator solution are added into a second reactor, the mixture is stirred and reacted for 20min under the conditions that the temperature is 85 ℃ and the stirring speed is 200rpm, the stirring speed is adjusted to 800rpm, the rest pre-emulsion and the initiator solution are dropwise added into the second reactor, the dropwise addition is completed within 2h, the temperature of the reaction solution in the second reactor is kept at 85 ℃ for 4h, then the temperature is reduced to the room temperature, the pH of the reaction solution is adjusted to 7-8 by ammonia water, and the second finishing agent can be obtained.

Optionally, before the pre-pilling resistant finish is carried out on the dehydrated cashmere products, a steam treatment step is further included, and the steam treatment step comprises the following steps:

uniformly hanging the dehydrated cashmere products on a hanging rod, and then sending the cashmere products into a steam chamber, wherein the distance between two adjacent cashmere products is 10-20 cm;

and (3) introducing steam with the temperature of 65-85 ℃ into the steam chamber, and keeping for 5-8 min to obtain the steam-treated cashmere product.

According to the anti-pilling process for the cashmere products, the cashmere products are firstly soaked in the buffer solution for soaking, the cashmere products are pretreated, salt bonds among cashmere fiber keratin are opened, the penetration of the fulling agent is facilitated, then the pretreated cashmere products are added into a fulling pool, the fulling agent is utilized for fulling, the texture of the cashmere products subjected to fulling treatment is tighter, the cohesive force among cashmere fibers is increased, the hand feeling, the appearance and the color of the cashmere products are improved, and meanwhile, the anti-pilling capability is realized; washing the fulling-treated cashmere product, cleaning the fulling agent remained on the surface of the cashmere product, dewatering, and performing pre-pilling finishing on the cashmere product by using sodium bisulfite to destroy salt bonds in cashmere fiber keratin so as to facilitate subsequent pilling-resistant finishing; and after anti-pilling finishing of the cashmere product, carrying out post-treatment to obtain the finished anti-pilling cashmere product. The finished anti-pilling cashmere product obtained by the process has the advantages of long service life, soft texture, good anti-pilling performance and water and oil repellency.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application are clearly and completely described below, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application without making any creative effort also belong to the protection scope of the present application.

The cashmere product is subjected to the action of mechanical external force and friction traction in the processing and wearing processes, when the external force is greater than the self strength of fibers in the cashmere product and the cohesive force among the fibers, the fibers are hooked and pulled into a loop shape, the end parts of the fibers are exposed out of the surface of the cashmere product, and the fibers around the fibers are pulled out of the surface of the cashmere product, so that the surface of the cashmere product has fiber loops and fuzz, wherein the process is a fuzzing stage, and the fuzzing is a primary stage of pilling of the cashmere product.

After fluffing, the loops of the fibers on the surface of the cashmere product are enlarged under the action of external force, the fluff on the surface of the cashmere product is lengthened, and the fibers are entangled and hooked with each other and gradually roll tightly under the rubbing, friction and repeated stretching and retracting of the external force to form wool pellets. The other end or both ends of the fiber in the wool pellet are embedded in the cashmere product, the formed pellet is fixed on the surface of the cashmere product, and under the continuous action of external force, the fiber in the pellet continuously pulls out new fiber, continues to be entangled and is rolled tightly, so that the pellet continuously becomes larger, forms complete spherulites and is connected on the surface of the cashmere product.

In order to improve the anti-pilling performance of the cashmere product, the application provides an anti-pilling process of the cashmere product, which comprises the following steps:

s101, placing the cashmere product to be treated in a buffer solution, soaking for 5-20 min at normal temperature at a bath ratio of 1: 15-1: 20, and then centrifugally spin-drying at a rotating speed of 650-800 rpm to obtain the pretreated cashmere product.

Optionally, the buffer is a disodium hydrogen phosphate-potassium dihydrogen phosphate buffer, a sodium dihydrogen phosphate-sodium hydroxide buffer or a disodium hydrogen phosphate-sodium dihydrogen phosphate buffer with the pH value of 5-7.

The cashmere fiber consists of three parts, namely a scale layer, a cortical layer and a cell membrane compound, from outside to inside in sequence, wherein the scale layer is positioned at the outermost layer and is a thin shell in a shape of scales formed by keratinized flat and non-nuclear keratin cells, the cashmere scales are mostly annular to coat hair shafts, the scales are thin, the surface is smooth, the edges are clear, and the number of the scales on the fiber unit length is small. The main component of cashmere is keratin, which is polypeptide chain macromolecule condensed by more than 20 kinds of alpha-amino acid. The alpha-amino acids with high content include cystine, glutamic acid, arginine, leucine, threonine and tyrosine, wherein the highest content is cystine. The polypeptide chain macromolecules contain carboxyl, amino and hydroxyl, and salt bonds and hydrogen bonds are formed among molecules; the sulfur element in keratin fiber exists mainly in the form of cystine, and the polypeptide chain macromolecules are connected by disulfide bonds of cystine to form cross-links. The macromolecular structure of the polypeptide chain determines that the keratin fiber is insoluble in water, weak acid, weak base and common organic solvents, and has the characteristics of chemical activity and chemical inertness.

In the application, the cashmere products are soaked in the buffer solution with the pH range of 5-7 for pretreatment, the used buffer solution is disodium hydrogen phosphate-potassium dihydrogen phosphate buffer solution, sodium dihydrogen phosphate-sodium hydroxide buffer solution or disodium hydrogen phosphate-sodium dihydrogen phosphate buffer solution, weak acidic buffer solution is selected to be beneficial to relaxing and opening of cashmere surface layer scales, salt bonds among polypeptide chain macromolecules are favorably damaged, penetration of a milling agent to cashmere fibers in the milling treatment process is facilitated, and the milling effect is favorably improved. In addition, the buffer solution used in the present application is not limited to the above mentioned buffer solution, and other buffer solutions with a pH range of 5 to 8 are also suitable for the pretreatment of cashmere in the present application.

S102, adding the pretreated cashmere product into a milling pool, adding 0.8-2.6% o.w.f milling agent, adding clear water to adjust the bath ratio to 1: 20-1: 35, adjusting the pH to 5-7, and performing milling treatment.

Optionally, the milling process comprises: controlling the milling temperature to be 30-40 ℃, stirring speed to be 5-15 rpm, and soaking for 20-35 min to obtain a pre-milled cashmere product;

The fulling is also called felting, the surface of the cashmere fiber is covered by scales, the free end of the scales points to the tip direction of the cashmere fiber, when the fulling agent exists, the cashmere fiber is wetted and expanded, the scales are opened, a certain external force is applied to the cashmere, the cashmere fiber moves, and the movement direction of the scales is necessarily pointed to the root end because the movement of the scales on the surface has a directional friction effect. After external force is removed, because the adjacent cashmere fiber scales are mutually staggered, the cashmere stays at a new position, when the cashmere fiber is subjected to the action of the external force again, the cashmere fiber generates relative displacement, and the cashmere continuously generates slow creeping under the action of the external force repeatedly for a plurality of times, so that the fiber is tangled, and the hair end protrudes on the surface to generate a fulling phenomenon. Therefore, the existence of scales is the most fundamental reason for the wool fibers to be fulling.

The fulling can make the fabric compact in texture, short in length, increased in square meter weight and thickness, improved in strength, and enhanced in elasticity and warmth retention. The surface of the cashmere product after fulling shows a layer of fluff, and the cashmere product has beautiful appearance, rich and soft hand feeling and soft color. In addition, the fluff generated by the fulling plays roles of fading and covering certain original defects of cashmere products, so that the defects are not obviously exposed on the surface of the fabric.

In the present application, the pH during the fulling process is adjusted with acetic acid and sodium acetate. The thickness of the suede after fulling treatment is 1-1.3 mm, and the texture of cashmere products after fulling treatment is tighter, so that cohesive force among cashmere fibers is increased, the cashmere fibers are not easy to be pulled out by hooks, and the occurrence of pilling phenomenon of the cashmere products can be reduced.

S103, placing the felted cashmere products in a clean water tank, cleaning for 5-8 min at a stirring speed of 5-15 rpm in a bath ratio of 1: 10-1: 15, and then dehydrating for 5-8 min at a rotating speed of 650-800 rpm.

In the application, the stirring and cleaning are beneficial to removing the fulling agent remained on the surface of the cashmere product, and the dehydration treatment is convenient for the subsequent finishing operation. The dehydration treatment can remove redundant moisture in the cashmere products, and is beneficial to the next pre-finishing operation.

And S104, adding the dehydrated cashmere product into a pre-finishing pool, and adding 2.2-3.5% o.w.f sodium bisulfite for pre-anti-pilling finishing.

In this application, add the sodium bisulfite in the preliminary treatment pond and carry out the anti pilling finish in advance to cashmere goods, the salt bond in cashmere fibre keratin can be destroyed to the sodium bisulfite for inside subsequent first finishing agent is changeed and is infiltrated cashmere fibre, is favorable to first finishing agent reaction and combines on cashmere fibre surface.

And S105, carrying out anti-pilling finishing on the cashmere product subjected to the pre-anti-pilling finishing, and carrying out post-treatment to obtain a finished anti-pilling cashmere product.

Optionally, the anti-pilling finish comprises:

adding the pre-anti-pilling finished cashmere product into a first finishing pool, adding 3-6% o.w.f of a first finishing agent, adding clear water to adjust the bath ratio to be 1: 20-1: 25, controlling the temperature to be 45-50 ℃, soaking for 20-30 min, centrifugally spin-drying at the rotating speed of 700-800 rpm for 3-5 min after finishing, washing for 5-10 times by using clear water according to the bath ratio of 1: 15-1: 25, and drying at low temperature in an environment with the temperature of 50-75 ℃ to obtain a first anti-pilling cashmere product;

The fineness of the cashmere fiber is 14-17 mu m, the length is 30-40 mm, the crimpness is 3-4/cm, and the fiber has the characteristics of thinness, shortness, softness, small crimpness and low cohesive force. After the cashmere fibers are formed into yarns, the number of the fibers in a unit section is large, the fiber ends exposed on the surfaces of the yarns and the fabrics are large, and the fibers easily slide to the surfaces of the fabrics from the yarns and the fabrics under the action of external force due to low yarn cohesion force, so that the fluffing phenomenon is generated. The scale layer structure of the cashmere fiber and the directional friction effect thereof enable the fiber in the yarn and the fabric to slide to the surface of the fabric to become unidirectional sliding. When the fabric is stressed, the fibers on the surface of the fabric are mutually interlaced and entangled into balls under the embedding action of the scale layer.

Therefore, the scale structure on the surface layer of the cashmere fiber is also a reason causing easy pilling of cashmere products, and if the fiber scales can be wrapped and passivated, mutual embedding of the scales is prevented, slippage of the fiber is prevented, and winding of bare fibers on the surface of a fabric is weakened, the anti-pilling effect can be obtained. The polymer finishing agent is adopted, and a polymer film is deposited on the surface of the fiber to effectively prevent cashmere from pilling, and hardly causes damage to cashmere fibers.

After the second anti-pilling cashmere product is dried, baking is carried out at the temperature of 100-140 ℃, so that the second finishing agent is further cured on the surface layer of the cashmere fibers to form a compact protective film, the service life is prolonged, the curing time of 30-90 s can meet the requirement of curing the second finishing agent, and the cashmere fibers are damaged due to overlong time; the higher the baking temperature used, the shorter the baking time.

According to the application, chitosan with the viscosity of 500-1000 cP and the deacetylation degree of 85-95% is used as a first finishing agent. Chitosan is also named as chitosan, soluble chitin and chitosan, the chitosan is a linear polyelectrolyte with active hydroxyl and amino, the solubility of the chitosan is related to deacetylation degree, relative molecular mass and viscosity, the higher the deacetylation degree, the smaller the relative molecular mass, the more soluble the chitosan is in water, the chitosan with low viscosity and high deacetylation degree has good water solubility, and for the chitosan, the low viscosity means low molecular weight, so that the chitosan can easily permeate into scales of cashmere fibers, and the chitosan with high deacetylation degree contains more amino groups, and can easily react with proteins of the cashmere fibers to be combined on the surfaces of the cashmere fibers.

According to the application, after the cashmere product is treated by the first finishing agent, the cashmere fiber is coated with the first anti-pilling layer formed by chitosan, the chitosan contains a plurality of hydroxyl groups and amino groups in the molecule due to the characteristics of the molecule of the chitosan, and the hydroxyl groups and the amino groups are strong polar sites. In the application, the chitosan layer not only plays a role of connecting cashmere fibers and the second anti-pilling layer, and is favorable for stabilizing the adhesion of the second finishing agent on the surface of the cashmere fibers, and even if the second anti-pilling layer is worn or falls off due to long-term use, the first anti-pilling layer formed by the chitosan has an anti-pilling effect.

Alternatively, the second finish is prepared as follows:

(1) according to the weight portion, 22 portions of hexamethylcyclotrisiloxane, 20 portions of vinyltriethoxy siloxane, 9 portions of 1,3, 5-trimethyl-1, 3, 5-tri (3,3, 3-trifluoropropyl) cyclotrisiloxane, 0.5 portion of sodium dodecyl sulfonate, 0.8 portion of polyethylene glycol mono-4-nonylphenyl ether n which is approximately equal to 20, 5 portions of potassium hydroxide and 120 portions of water are added into a first reactor, the stirring speed is set to be 200rpm, the reaction temperature is increased from the beginning of stirring to the preset temperature of 80 ℃, and the heating rate is 5 ℃/min, so as to prepare a pre-emulsion;

(2) preparing 0.15 part of ammonium persulfate and 20 parts of water into an initiator solution;

(3) 1/5 is taken from the pre-emulsion and the initiator solution respectively, the pre-emulsion and the initiator solution are added into a second reactor, the mixture is stirred and reacted for 20min under the conditions that the temperature is 85 ℃ and the stirring speed is 200rpm, the stirring speed is adjusted to 800rpm, the rest pre-emulsion and the initiator solution are dropwise added into the second reactor, the dropwise addition is completed within 2h, the temperature of the reaction solution in the second reactor is kept at 85 ℃ for 4h, then the temperature is reduced to the room temperature, the pH of the reaction solution is adjusted to 7-8 by ammonia water, and the second finishing agent can be obtained.

In the synthesis of the second finish, the following reaction takes place:

that is, the second finishing agent synthesized in the application is a fluorine-containing polysiloxane finishing agent, in the polysiloxane finishing agent, a polysiloxane main chain is composed of Si and O atoms alternately and is a flexible spiral straight-chain structure, and the main chain has excellent flexibility due to the large bond angle of Si-O-Si and the almost zero rotation energy of-O bonds. Two methyl groups are attached to each Si atom, perpendicular to the plane of the line connecting the two adjacent oxygen atoms. The methyl group can rotate and vibrate around the Si-O bond, and three H atoms of each methyl group are like an umbrella which is outwards stretched, and the H atoms occupy larger space due to the rotation of the methyl group, so that the distance between adjacent molecules is increased. Meanwhile, due to the shielding effect of methyl, the siloxane has the characteristics of small intermolecular force, large molar volume, small surface tension and strong film forming property.

The second finishing agent used in the application is fluorine-containing polysiloxane finishing agent which is insoluble in water, and water is added to prepare emulsion for use in the using process. In the application, in the second finishing pool, the combination of the second finishing agent and the first finishing agent or cashmere fibrin is facilitated under the weak acid condition that the pH value is 4-5, the impregnation temperature is 75-85 ℃, and the impregnation time is 1-2 h, so that the combination efficiency of the second finishing agent and the first finishing agent or cashmere fibrin can be improved.

In the present application, acetic acid and sodium acetate are used to adjust the pH in the pre-pilling prevention finish and the anti-pilling finish.

Optionally, the post-processing comprises:

adding 5-10% o.w.f. absolute ethyl alcohol into clear water to adjust the bath ratio to be 1: 15-1: 25, and carrying out primary cleaning on the anti-pilling finished cashmere product at the temperature of 35-45 ℃ and under the condition that the pH value is 7 to obtain a primary cleaned cashmere product;

washing the cashmere product washed for the first time for the second time by using clean water according to the conditions of bath ratio of 1: 20-1: 25, temperature of 30-40 ℃ and pH of 7, wherein the washing for the second time can be repeated for 2-3 times;

In the application, the water solution of ethanol is adopted to clean the pilling finished cashmere product in the first cleaning process, so that the residual finishing agent caused by non-polymerization on the surface of the cashmere product is removed, and the adverse effect of the residual finishing agent on a user is avoided. The secondary cleaning is carried out by adopting clean water, so that residual ethanol on the surface of the cashmere product in the primary cleaning process can be removed, and the potential safety hazard in the subsequent drying process due to the existence of the ethanol is avoided. The neutral washing condition can avoid the damage to cashmere products in the washing process.

Optionally, before the pre-pilling resistant finish is performed on the dehydrated cashmere product, the method further comprises a steam treatment step, wherein the steam treatment step comprises the following steps:

Because the surface layer of the cashmere fibers is of a scale-shaped structure and is essentially highly cross-linked keratin, the scale on the surface layer of the cashmere fibers can be opened by steam treatment, the permeation of the finishing agent to the cashmere fibers is facilitated, and the finishing effect of the finishing agent to the cashmere fibers is improved; in addition, the low-temperature steam with the temperature of 65-85 ℃ is used, so that the damage of high temperature to cashmere fibers can be effectively avoided. The cashmere fibers subjected to steam treatment become softer, so that the finishing agent can permeate into the inner layer of the cashmere fibers, the permeation of the finishing agent, particularly chitosan serving as the first finishing agent, is enhanced, and the firmness and durability of the combination of the first finishing agent on the cashmere fibers can be improved.

According to the anti-pilling process for the cashmere products, the cashmere products are soaked in the buffer solution firstly, the pretreatment is carried out on the cashmere products, salt bonds among cashmere fiber keratin are opened, the penetration of the fulling agent is facilitated, then the pretreated cashmere products are added into a fulling pool, the fulling agent is utilized for fulling treatment, the texture of the cashmere products subjected to the fulling treatment is tighter, the cohesive force among cashmere fibers is increased, the hand feeling, the appearance and the color of the cashmere products are improved, and meanwhile, the anti-pilling capability is achieved to a certain extent; washing the felted cashmere product, washing off a felting agent remained on the surface of the cashmere product, dewatering, and then carrying out pre-anti-pilling finishing on the cashmere product by using sodium bisulfite to destroy salt bonds in cashmere fiber keratin, thereby facilitating subsequent anti-pilling finishing; and after the anti-pilling finishing of the cashmere product, carrying out post-treatment to obtain a finished product anti-pilling cashmere product. The finished anti-pilling cashmere product treated by the process has the advantages of long service life, soft texture, good anti-pilling performance, and water and oil repellency.

The cashmere products mentioned in the process of the application include but are not limited to wool and wool yarn made of cashmere; in addition, the process provided by the application is not limited to cashmere products, and other wools and wool yarns made of other animal villi such as wool, alpaca, rabbit hair and the like through modern spinning process technology are also suitable for the process of the application.

Example 1

An anti-pilling process for cashmere products comprises the following steps:

1. selecting 100% cashmere flat card clothing pieces (natural color) with yarn linear density of 35.7tex 2(28/2Nm) and 14 needles/25.4 mm as cashmere products to be treated, immersing the cashmere products into disodium hydrogen phosphate-potassium dihydrogen phosphate buffer solution with pH of 5-7 according to a bath ratio of 1:15, soaking for 5min, and centrifugally spin-drying at a rotating speed of 650rpm to obtain the pretreated cashmere products.

2. Adding the pretreated cashmere product into a milling pool, adding 0.8% o.w.f detergent 209 as milling agent, adding clear water to adjust the bath ratio to be 1:20, adjusting the pH to be 5-7 by using acetic acid and sodium acetate, controlling the milling temperature to be 30 ℃, stirring at 5rpm, soaking for 20min, and dehydrating at 600rpm for 3min to obtain the milled cashmere product.

3. Placing the felted cashmere products in a clean water tank, stirring and washing the products for 5min at a bath ratio of 1:10 and a rotating speed of 5rpm, and then dehydrating the products for 5min at a rotating speed of 650 rpm.

4. And (3) adding the dehydrated cashmere product into a pre-finishing pool, adding 2.2% o.w.f sodium bisulfite, adding clear water to adjust the bath ratio to 1:20, adjusting the pH to 6.5-7 by using acetic acid, controlling the temperature to be 45 ℃, soaking for 20min, and centrifugally spin-drying for 3min at the rotating speed of 800rpm after finishing to obtain the anti-pilling finished cashmere product.

5. Adding the cashmere products subjected to pre-anti-pilling finishing into a first finishing pool, adding 3% o.w.f of chitosan with the viscosity of 500-1000 cP and the deacetylation degree of 85-95%, then adding clear water to adjust the bath ratio to be 1:20, controlling the temperature to be 45 ℃, soaking for 20min, centrifugally spin-drying for 3min at the rotating speed of 700rpm after finishing, then washing for 5 times by using clear water according to the bath ratio of 1:15, and drying at low temperature in an environment with the temperature of 50 ℃ to obtain the first anti-pilling cashmere products.

6. Adding the first anti-pilling cashmere product into a second finishing pool, adding 0.6% o.w.f second finishing agent, adding clear water to adjust the bath ratio to be 1:35, controlling the temperature to be 75 ℃ and the pH to be 4-5, soaking for 1h, and centrifugally spin-drying for 3min at the rotating speed of 700rpm after finishing to obtain a second anti-pilling cashmere product.

7. And drying the second anti-pilling cashmere product at 65 ℃, and then baking for 90s at 100 ℃ to obtain the anti-pilling finished cashmere product.

8. Adding 5% o.w.f. absolute ethyl alcohol into the anti-pilling finished cashmere product, adding clear water to adjust the bath ratio to be 1:15, and carrying out first cleaning on the anti-pilling finished cashmere product under the conditions of the temperature of 35 ℃ and the pH value of 7 to obtain the first cleaned cashmere product.

9. And (3) carrying out secondary cleaning on the cashmere product subjected to the primary cleaning by using clean water according to the bath ratio of 1:20, the temperature of 30 ℃ and the pH value of 7.

10. And (3) centrifugally dewatering the cashmere product subjected to the secondary cleaning for 5min at the rotating speed of 800rpm, and drying at 75 ℃ to obtain the finished anti-pilling cashmere product.

Example 2

An anti-pilling process for cashmere products comprises the following steps:

1. selecting 100% cashmere flat card clothing pieces (natural color) with yarn linear density of 35.7tex 2(28/2Nm) and 14 needles/25.4 mm as cashmere products to be treated, soaking the cashmere products in disodium hydrogen phosphate-potassium dihydrogen phosphate buffer solution at a bath ratio of 1:20 for 20min at normal temperature, and centrifugally spin-drying at a rotating speed of 800rpm to obtain the pretreated cashmere products.

2. Adding the pretreated cashmere product into a milling pool, adding a milling agent with the concentration of 2.6% o.w.f, adding clear water to adjust the bath ratio to be 1:35, adjusting the pH to be 5-7 by utilizing acetic acid and sodium acetate, controlling the milling temperature to be 40 ℃, stirring speed to be 15rpm, and soaking for 35min to obtain the pre-milled cashmere product.

3. And (3) placing the felted cashmere product in a clean water tank, cleaning for 8min at a stirring speed of 5-15 rpm according to a bath ratio of 1:15, and dehydrating for 8min at a rotating speed of 800rpm to obtain the dehydrated cashmere product.

4. And (2) adding the dehydrated cashmere product into a pre-finishing pool, adding 3.5% o.w.f sodium bisulfite, adding clear water to adjust the bath ratio to 1:25, adjusting the pH to 6.5-7, controlling the temperature to be 55 ℃, soaking for 35min, and centrifugally spin-drying at 950rpm for 5min after finishing to obtain the anti-pilling finished cashmere product.

5. Adding the cashmere products subjected to the anti-pilling finishing into a first finishing pool, adding 6% o.w.f of a first finishing agent, then adding clear water to adjust the bath ratio to be 1:25, controlling the temperature to be 50 ℃, soaking for 30min, centrifugally spin-drying for 5min at the rotating speed of 800rpm after finishing, then washing for 5-10 times by using clear water according to the bath ratio of 1:25, and drying at low temperature in an environment with the temperature of 75 ℃ to obtain the first anti-pilling cashmere products.

6. Adding the first anti-pilling cashmere product into a second finishing pool, adding 1.6% o.w.f second finishing agent, adding clear water to adjust the bath ratio to 1:45, controlling the temperature to be 85 ℃, controlling the pH to be 4-5, soaking for 2h, and centrifugally spin-drying for 5min at the rotating speed of 800rpm after finishing to obtain a second anti-pilling cashmere product.

7. And drying the second anti-pilling cashmere product at 85 ℃, and baking the second anti-pilling cashmere product at 140 ℃ for 30s to obtain the anti-pilling finished cashmere product.

8. Adding 10% o.w.f absolute ethyl alcohol into the anti-pilling finished cashmere product, adding clear water to adjust the bath ratio to be 1:25, and carrying out first cleaning on the anti-pilling finished cashmere product under the conditions that the temperature is 45 ℃ and the pH value is 7 to obtain the cashmere product after the first cleaning.

9. And (3) carrying out secondary cleaning on the cashmere product subjected to the primary cleaning by using clean water according to the conditions of bath ratio of 1:25, temperature of 340 ℃ and pH value of 7, and repeating the secondary cleaning for 1 time.

10. And (3) centrifugally dewatering the cashmere product subjected to the secondary cleaning for 8min at the rotating speed of 1000rpm, and drying at 85 ℃ to obtain the finished anti-pilling cashmere product.

Example 3

An anti-pilling process for cashmere products comprises the following steps:

1. selecting 100% cashmere flat card clothing pieces (natural color) with yarn linear density of 35.7tex 2(28/2Nm) and 14 needles/25.4 mm as cashmere products to be treated, soaking the cashmere products in disodium hydrogen phosphate-potassium dihydrogen phosphate buffer solution at a bath ratio of 1:16 for 10min at normal temperature, and centrifugally spin-drying at a rotating speed of 700rpm to obtain the pretreated cashmere products.

2. Adding the pretreated cashmere product into a milling pool, adding 1.8% o.w.f milling agent, adding clear water to adjust the bath ratio to be 1:25, adjusting the pH to be 5-7 by utilizing acetic acid and sodium acetate, controlling the milling temperature to be 35 ℃, stirring speed to be 10rpm, and soaking for 25min to obtain the pre-milled cashmere product.

3. And (3) placing the fulling treated cashmere products into a clean water tank, cleaning for 7min at a stirring speed of 12rpm according to a bath ratio of 1:12, and dehydrating for 7min at a rotating speed of 700rpm to obtain the dehydrated cashmere products.

4. And (3) adding the dehydrated cashmere product into a pre-finishing pool, adding 2.5% o.w.f sodium bisulfite, adding clear water to adjust the bath ratio to 1:22, adjusting the pH to 6.5-7, controlling the temperature to be 50 ℃, soaking for 25min, and centrifugally spin-drying for 4min at the rotation speed of 900rpm after finishing to obtain the anti-pilling finished cashmere product.

5. Adding the cashmere products subjected to anti-pilling finishing into a first finishing pool, adding a first finishing agent of 5% o.w.f, then adding clear water to adjust the bath ratio to be 1:22, controlling the temperature to be 47 ℃, soaking for 25min, centrifugally spin-drying for 4min at the rotating speed of 750rpm after finishing, then washing for 8 times by using clear water according to the bath ratio of 1:20, and drying at low temperature in an environment with the temperature of 65 ℃ to obtain the first anti-pilling cashmere products.

6. Adding the first anti-pilling cashmere product into a second finishing pool, adding 1.2% o.w.f of a second finishing agent, adding clear water to adjust the bath ratio to be 1:30, controlling the temperature to be 80 ℃, controlling the pH to be 4-5, soaking for 1.5h, and centrifugally spin-drying for 4min at the rotating speed of 750rpm after finishing, thereby obtaining the second anti-pilling cashmere product.

7. And drying the second anti-pilling cashmere product at 75 ℃, and baking for 45s at 110 ℃ to obtain the anti-pilling finished cashmere product.

8. Adding 8% o.w.f absolute ethyl alcohol into the anti-pilling finished cashmere product, adding clear water to adjust the bath ratio to be 1:20, and carrying out first cleaning on the anti-pilling finished cashmere product under the conditions that the temperature is 40 ℃ and the pH value is 7 to obtain the cashmere product after the first cleaning.

9. And (3) carrying out secondary cleaning on the cashmere product subjected to the primary cleaning by using clean water according to the conditions of bath ratio of 1:22, temperature of 37 ℃ and pH value of 7, and repeating the secondary cleaning for 2 times.

10. And (3) centrifugally dewatering the cashmere product subjected to the secondary cleaning for 7min at the rotating speed of 900rpm, and drying at 80 ℃ to obtain the finished anti-pilling cashmere product.

Example 4

An anti-pilling process for cashmere products comprises the following steps:

1. selecting 100% cashmere flat card clothing pieces (natural color) with yarn linear density of 35.7tex 2(28/2Nm) and 14 needles/25.4 mm as cashmere products to be treated, soaking the cashmere products in disodium hydrogen phosphate-potassium dihydrogen phosphate buffer solution at a bath ratio of 1:16 for 15min at normal temperature, and centrifugally spin-drying at a rotating speed of 750rpm to obtain the pretreated cashmere products.

2. Adding the pretreated cashmere product into a milling pool, adding 1.6% o.w.f milling agent, adding clear water to adjust the bath ratio to 1:32, adjusting the pH to 5-7 by using acetic acid and sodium acetate, controlling the milling temperature to 35 ℃, stirring at 12rpm, and soaking for 28min to obtain the pre-milled cashmere product.

3. And (3) placing the fulling treated cashmere products into a clean water tank, cleaning for 68min at a bath ratio of 1:12 and a stirring speed of 13rpm, and dehydrating for 6min at a rotating speed of 780rpm to obtain dehydrated cashmere products.

4. And (2) adding the dehydrated cashmere product into a pre-finishing pool, adding 2.7% o.w.f sodium bisulfite, adding clear water to adjust the bath ratio to 1:24, adjusting the pH to 6.5-7, controlling the temperature to be 52 ℃, soaking for 32min, and centrifugally spin-drying for 5min at the rotating speed of 800-950 rpm after finishing to obtain the pre-anti-pilling finished cashmere product.

5. Adding the cashmere products subjected to anti-pilling finishing into a first finishing pool, adding a first finishing agent of 5% o.w.f, then adding clear water to adjust the bath ratio to be 1:24, controlling the temperature to be 48 ℃, soaking for 27min, centrifugally spin-drying for 5min at the rotating speed of 760rpm after finishing, then washing for 6 times by using clear water according to the bath ratio of 1:18, and drying at low temperature in an environment with the temperature of 65 ℃ to obtain the first anti-pilling cashmere products.

6. Adding the first anti-pilling cashmere product into a second finishing pool, adding 0.6-1.6% o.w.f of a second finishing agent, adding clear water to adjust the bath ratio to be 1:39, controlling the temperature to be 82 ℃ and the pH to be 4-5, soaking for 1.8h, and centrifugally spin-drying for 3.5min at the rotating speed of 800rpm after finishing, thus obtaining a second anti-pilling cashmere product.

7. And drying the second anti-pilling cashmere product at 70 ℃, and then baking for 50s at 120 ℃ to obtain the anti-pilling finished cashmere product.

8. Adding 6% o.w.f absolute ethyl alcohol into the anti-pilling finished cashmere product, adding clear water to adjust the bath ratio to be 1:22, and carrying out first cleaning on the anti-pilling finished cashmere product under the conditions of 42 ℃ and pH value of 7 to obtain the cashmere product after the first cleaning.

9. And (3) carrying out secondary cleaning on the cashmere product subjected to the primary cleaning by using clean water according to the conditions of bath ratio of 1:24, temperature of 37 ℃ and pH value of 7, and repeating the secondary cleaning for 2 times.

10. And (3) centrifugally dewatering the cashmere product subjected to the secondary cleaning for 6min at the rotating speed of 850rpm, and drying at 80 ℃ to obtain the finished anti-pilling cashmere product.

Example 5

An anti-pilling process for cashmere products comprises the following steps:

1. selecting 100% cashmere flat card clothing pieces (natural color) with yarn linear density of 35.7tex 2(28/2Nm) and 14 needles/25.4 mm as cashmere products to be treated, soaking the cashmere products in disodium hydrogen phosphate-potassium dihydrogen phosphate buffer solution at a bath ratio of 1:17 for 16min at normal temperature, and centrifugally spin-drying the cashmere products at a rotating speed of 720rpm to obtain the pretreated cashmere products.

2. Adding the pretreated cashmere product into a milling pool, adding 2.1% o.w.f milling agent, adding clear water to adjust the bath ratio to 1:31, adjusting the pH to 5-7 by using acetic acid and sodium acetate, controlling the milling temperature to be 38 ℃, stirring at 10rpm, and soaking for 28min to obtain the pre-milled cashmere product.

3. And (3) placing the fulling treated cashmere products into a clean water tank, cleaning for 7min at a bath ratio of 1:14 and at a stirring speed of 8rpm, and dehydrating for 8min at a rotating speed of 760rpm to obtain the dehydrated cashmere products.

4. And (3) adding the dehydrated cashmere product into a pre-finishing pool, adding 3.2% o.w.f sodium bisulfite, adding clear water to adjust the bath ratio to 1:23, adjusting the pH to 6.5-7, controlling the temperature to be 52 ℃, soaking for 32min, and centrifugally spin-drying for 4min at the rotating speed of 880rpm after finishing to obtain the anti-pilling finished cashmere product.

5. Adding the cashmere products subjected to anti-pilling finishing into a first finishing pool, adding a 4.5% o.w.f first finishing agent, then adding clean water to adjust the bath ratio to be 1:21, controlling the temperature to be 49 ℃, soaking for 24min, centrifugally spin-drying for 5min at the rotating speed of 760rpm after finishing, then washing for 8 times by using clean water according to the bath ratio to be 1:19, and drying at low temperature in an environment with the temperature of 70 ℃ to obtain the first anti-pilling cashmere products.

6. And adding the first anti-pilling cashmere product into a second finishing pool, adding 1.3% o.w.f of a second finishing agent, then adding clear water to adjust the bath ratio to be 1:42, controlling the temperature to be 77 ℃ and the pH to be 4-5, soaking for 2h, and centrifugally spin-drying for 5min at the rotating speed of 790rpm after finishing to obtain a second anti-pilling cashmere product.

7. And drying the second anti-pilling cashmere product at 81 ℃, and then baking for 35s at 130 ℃ to obtain the anti-pilling finished cashmere product.

8. Adding 7.5% o.w.f. absolute ethyl alcohol into the anti-pilling finished cashmere product, adding clear water to adjust the bath ratio to be 1:18, and carrying out first cleaning on the anti-pilling finished cashmere product under the conditions that the temperature is 41 ℃ and the pH value is 7 to obtain the first cleaned cashmere product.

9. And (3) carrying out secondary cleaning on the cashmere product subjected to the primary cleaning by using clean water according to the bath ratio of 1:22, the temperature of 38 ℃ and the pH value of 7, and repeating the secondary cleaning for 3 times.

10. And (3) centrifugally dewatering the cashmere product subjected to the secondary cleaning for 8min at the rotating speed of 1000rpm, and drying at 79 ℃ to obtain the finished anti-pilling cashmere product.

Example 6

An anti-pilling process for cashmere products comprises the following steps:

2. Adding the pretreated cashmere product into a milling pool, adding a milling agent with the concentration of 2.1% o.w.f, adding clear water to adjust the bath ratio to be 1:31, adjusting the pH to be 5-7 by utilizing acetic acid and sodium acetate, controlling the milling temperature to be 38 ℃, stirring at the speed of 10pm, and soaking for 28min to obtain the pre-milled cashmere product.

4. Uniformly hanging the dehydrated cashmere products on a hanging rod, and then sending the cashmere products into a steam chamber, wherein the distance between two adjacent cashmere products is 10 cm; and (3) introducing steam with the temperature of 65 ℃ into the steam chamber, and keeping for 8min to obtain the steam-treated cashmere product.

5. Adding the cashmere product subjected to steam treatment into a pre-finishing pool, adding 3.2% o.w.f sodium bisulfite, adding clear water to adjust the bath ratio to 1:23, adjusting the pH to 6.5-7, controlling the temperature to be 52 ℃, soaking for 32min, and centrifugally spin-drying at 880rpm for 4min after finishing to obtain the cashmere product subjected to pre-anti-pilling finishing.

6. Adding the cashmere products subjected to anti-pilling finishing into a first finishing pool, adding a 4.5% o.w.f first finishing agent, then adding clean water to adjust the bath ratio to be 1:21, controlling the temperature to be 49 ℃, soaking for 24min, centrifugally spin-drying for 5min at the rotating speed of 760rpm after finishing, then washing for 8 times by using clean water according to the bath ratio to be 1:19, and drying at low temperature in an environment with the temperature of 70 ℃ to obtain the first anti-pilling cashmere products.

7. Adding the first anti-pilling cashmere product into a second finishing pool, adding 1.3% o.w.f of a second finishing agent, adding clear water to adjust the bath ratio to be 1:42, controlling the temperature to be 77 ℃ and the pH to be 4-5, soaking for 2h, and centrifugally spin-drying for 5min at the rotating speed of 790rpm after finishing to obtain a second anti-pilling cashmere product.

8. And drying the second anti-pilling cashmere product at 81 ℃, and baking the second anti-pilling cashmere product at 130 ℃ for 35s to obtain the anti-pilling finished cashmere product.

9. Adding 7.5% o.w.f of absolute ethyl alcohol into the anti-pilling finished cashmere product, adding clear water to adjust the bath ratio to be 1:18, and carrying out first cleaning on the anti-pilling finished cashmere product under the conditions that the temperature is 41 ℃ and the pH value is 7 to obtain the cashmere product after the first cleaning.

10, carrying out secondary cleaning on the cashmere product subjected to the primary cleaning by using clean water according to the bath ratio of 1:22, the temperature of 38 ℃ and the pH value of 7, and repeating the secondary cleaning for 3 times.

11. And (3) centrifugally dewatering the cashmere product subjected to the secondary cleaning for 8min at the rotating speed of 1000rpm, and drying at 79 ℃ to obtain the finished anti-pilling cashmere product.

Example 7

An anti-pilling process for cashmere products comprises the following steps:

3. And (3) placing the felted cashmere product in a clean water tank, washing for 7min at a stirring speed of 8rpm according to a bath ratio of 1:14, and dehydrating for 8min at a rotating speed of 760rpm to obtain the dehydrated cashmere product.

4. Uniformly hanging the dehydrated cashmere products on a hanging rod, and then sending the cashmere products into a steam chamber, wherein the distance between two adjacent cashmere products is 20 cm; and introducing steam with the temperature of 85 ℃ into the steam chamber, and keeping for 5min to obtain the steam-treated cashmere product.

6. Adding the cashmere products subjected to the anti-pilling finishing into a first finishing pool, adding a 4.5% o.w.f first finishing agent, then adding clear water to adjust the bath ratio to 1:21, controlling the temperature to be 49 ℃, soaking for 24min, centrifugally spin-drying for 5min at the rotating speed of 760rpm after finishing, then washing for 8 times by using clear water according to the bath ratio of 1:19, and drying at low temperature in an environment with the temperature of 70 ℃ to obtain the first anti-pilling cashmere products.

7. And adding the first anti-pilling cashmere product into a second finishing pool, adding 1.3% o.w.f of a second finishing agent, then adding clear water to adjust the bath ratio to be 1:42, controlling the temperature to be 77 ℃ and the pH to be 4-5, soaking for 2h, and centrifugally spin-drying for 5min at the rotating speed of 790rpm after finishing to obtain a second anti-pilling cashmere product.

8. And drying the second anti-pilling cashmere product at 81 ℃, and then baking for 35s at 130 ℃ to obtain the anti-pilling finished cashmere product.

9. Adding 7.5% o.w.f. absolute ethyl alcohol into the anti-pilling finished cashmere product, adding clear water to adjust the bath ratio to be 1:18, and carrying out first cleaning on the anti-pilling finished cashmere product under the conditions that the temperature is 41 ℃ and the pH value is 7 to obtain the first cleaned cashmere product.

10. And (3) carrying out secondary cleaning on the cashmere product subjected to the primary cleaning by using clean water according to the conditions of bath ratio of 1:22, temperature of 38 ℃ and pH of 7, and repeating the secondary cleaning for 3 times.

Example 8

The anti-pilling process of the cashmere product is the same as that of the embodiment 5, and is different from the embodiment 5 in that:

no second finishing agent is added, and the related operation of the second anti-pilling cashmere product is also not carried out.

Example 9

The anti-pilling process for the cashmere product is the same as that in example 5 except that: no first finishing agent is added, and the relevant operation of the first anti-pilling cashmere product is not carried out.

Comparative example 1

In this comparative example, a 100% cashmere flat card clothing (true color) was selected, the yarn linear density was 35.7tex 2(28/2Nm), and 14 needles/25.4 mm were used as comparative example samples without any treatment.

Experimental example 1

Anti-pilling effect and pile thickness determination

1. According to the standard GB/T4802.3-2008 < determination of pilling behaviour of textile fabrics part 3: pilling box method, the pilling resistance cashmere products prepared in the above examples 1-9 and the comparative sample in the comparative example 1 are measured, according to the specified method and test parameters, the 114mm sample is sleeved on the polyurethane plastic tube, and put into the pilling box, the box body is turned over 14400 turns and stops, and then the pilling number (N, pieces/130 cm) of the fabric is measured²) Degree of pilling (W, mg/130 cm)²) And pilling singleweight (S, mg/piece) were evaluated. The number of the balls is used for reflecting the absolute number of the balls in the test area, the ball-up degree is used for reflecting the absolute mass of the balls in the test area, and the single weight of the balls is used for reflecting the average mass of the hair balls, so that S is W/N.

2. The pile thickness of the finished anti-pilling cashmere products obtained in examples 1 to 9 was measured according to the method of measurement in standard GB/T3820-1997 determination of thickness of textiles and textile products.

The results of the above measurements are shown in table 1:

TABLE 1

As can be seen from the above experimental results in examples 1-7, the pilling degree of the cashmere products treated by the process of the present application is 1.0mg/130cm²About, the degree of pilling was 7.112mg/130cm compared with that of comparative example 1²The process can improve the pilling resistance of the cashmere product. The results of example 8 and example 9 show that: the cashmere products treated only by the first finishing agent or only by the second finishing agent also have better anti-pilling performance, and meanwhile, the example 8 also shows that after the cashmere products are used for a long time, even if the second anti-pilling layer formed by the second finishing agent on the surface is completely worn, the first anti-pilling still has good anti-pilling effect.

Experimental example 2

Water and oil repellency test

1. Reference AATCC22.2005 "textile water repellency test: the water repellency of the anti-pilling cashmere products obtained in the above examples 1 to 9 was measured by the test method of the spray method, and the results are shown in table 2.

Rating scale for fabric wetting grade: the whole wetting of the surface to be showered is I level, half of the surface to be showered is 2 level, the wetting of the small area of the surface to be showered which is not connected is 3 level, the wetting of the surface to be showered which is not wetted but has water drops on the surface is 4 level, and the wetting of the surface to be showered which is not wetted but has no water drops on the surface is 5 level. The higher the water-repelling grade, the better the water-repelling effect of the fabric.

2. The oil repellency of the finished anti-pilling cashmere products prepared in the above examples 1 to 9 is measured by referring to the method of GB/T19977-2014 'test for oil repellency and hydrocarbon resistance of textiles', and the comparative example 1 is used as a blank reference.

Two samples of 5cm by 5cm are taken, salad oil with the diameter of 5mm or the volume of 5mL is dripped on 5 positions of 4cm away from each other of the samples, the shape of the salad oil drop is observed for 30s at an angle of about 45 degrees, and 2 drops or more in 3 drops are taken as the standard. According to the rating method in GB/T19977-2014, the oil droplets are rated according to the condition that the oil droplets are obviously wetted or are fully wetted. The results are shown in Table 2.

TABLE 2

As can be seen from the results in table 2, the cashmere products treated by the process of the present application have water and oil repellency grades above 4, and the cashmere products of example 8 have low water repellency because the cashmere products of example 8 are treated with only the first finishing agent, which is chitosan, and the chitosan surface has a large amount of hydrophilic hydroxyl groups and amino groups, which reduces the water repellency.

Experimental example 3

Water and oil repellent textile washability test

Refer to the national standard GB/T12490.2007 textile color fastness test: color fastness to home and commercial laundering "by washing fabrics with weakly basic, brightener and enzyme-free detergents. In this experiment, the water and oil repellency of the sample was measured by the method of Experimental example 2 after washing the fabrics of examples 3 and 7 repeatedly 5 times, 10 times, 20 times, 25 times and 30 times using a nonionic detergent at a concentration of 2.0g/L at a bath ratio of 1:50 and a washing temperature of about 30 ℃. The results are shown in Table 3.

TABLE 3

As can be seen from the test results of example 3 in table 3, after the cashmere product treated by the process of the present application is washed 20 times, the water-repellent and oil-repellent effects are unchanged, and after the cashmere product is washed 30 times, the cashmere product still has good water-repellent and oil-repellent effects, and the experimental results show that: the fabric treated by the process has good water and oil repellency and durability.

The test result of example 7 in table 3 shows that the water and oil repellent effect of the cashmere product treated by the process of the present application is unchanged after 25 times of washing, and the cashmere product still has excellent water and oil repellent effect after 30 times of washing, and the experimental result shows that the effect of the first finishing agent and the second finishing agent can be improved by steam treatment.

Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those skilled in the art; the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present application.

Claims

1. An anti-pilling process for cashmere products is characterized by comprising the following steps:

adding the pretreated cashmere product into a milling pool, adding 0.8-2.6% o.w.f milling agent, adding clear water to adjust the bath ratio to 1: 20-1: 35, adjusting the pH to 5-7, and milling;

placing the felted cashmere products in a clean water tank, cleaning for 5-8 min at a stirring speed of 5-15 rpm in a bath ratio of 1: 10-1: 15, and then dehydrating for 5-8 min at a rotating speed of 650-800 rpm;

and carrying out anti-pilling finishing on the cashmere product subjected to the pre-anti-pilling finishing, and carrying out post-treatment to obtain a finished product anti-pilling cashmere product.

2. The anti-pilling process for the cashmere products as claimed in claim 1, wherein the buffer is a disodium hydrogen phosphate-potassium dihydrogen phosphate buffer, a sodium dihydrogen phosphate-sodium hydroxide buffer or a disodium hydrogen phosphate-sodium dihydrogen phosphate buffer with the pH value of 5-7.

3. The anti-pilling process for cashmere products according to claim 1, characterized in that the fulling treatment includes:

4. The anti-pilling process for cashmere products according to claim 1, wherein the fulling agent is: one or more of a detergent 209, a detergent 105, a neutral soap powder, pancreatic plus bleach T, lauroyl diethanolamine, and 18-crown-6.

5. The anti-pilling process for cashmere products according to claim 1, characterized in that said pre-anti-pilling finish is: adding clear water into the pre-finishing pool to adjust the bath ratio to be 1: 20-1: 25, adjusting the pH to be 6.5-7, soaking for 20-35 min at the temperature of 45-55 ℃, and centrifugally spin-drying for 3-5 min at the rotating speed of 800-950 rpm after finishing to obtain the anti-pilling finished cashmere product.

6. The anti-pilling process for cashmere products according to claim 1, characterized in that said anti-pilling finish comprises:

adding the first anti-pilling cashmere product into a second finishing pool, adding 0.6-1.6% o.w.f of a second finishing agent, then adding clear water to adjust the bath ratio to be 1: 35-1: 45, controlling the temperature to be 75-85 ℃, controlling the pH to be 4-5, soaking for 1-2 h, and centrifugally spin-drying at the rotating speed of 700-800 rpm for 3-5 min after finishing to obtain a second anti-pilling cashmere product;

7. The anti-pilling process for cashmere products according to claim 1, characterized in that said post-treatment comprises:

carrying out secondary cleaning on the cashmere product subjected to the primary cleaning by using clean water according to the bath ratio of 1: 20-1: 25, the temperature of 30-40 ℃ and the pH of 7, wherein the secondary cleaning can be repeated for 2-3 times to obtain the cashmere product subjected to the secondary cleaning;

8. The anti-pilling process for the cashmere products as claimed in claim 6, wherein the first finishing agent is chitosan with viscosity of 500-1000 cP and deacetylation degree of 85-95%.

9. The anti-pilling process for cashmere products according to claim 6, characterized in that the second finishing agent is prepared according to the following method:

preparing initiator solution by taking 0.15 part of ammonium persulfate and 20 parts of water;

10. The anti-pilling process for the cashmere products according to any one of claims 1 to 9, characterized by further comprising a steam treatment step before the pre-anti-pilling finishing is carried out on the dehydrated cashmere products, wherein the steam treatment step comprises: