CN111887512B

CN111887512B - Preparation method of completely degradable baby saliva towel

Info

Publication number: CN111887512B
Application number: CN202010744345.3A
Authority: CN
Inventors: 何炽斌; 何欣洋
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-07-29
Filing date: 2020-07-29
Publication date: 2022-06-21
Anticipated expiration: 2040-07-29
Also published as: CN111887512A

Abstract

The invention discloses a preparation method of a completely degradable baby saliva towel, which comprises the following steps: s1, selecting a bottom layer fiber material; s2, preparing a bottom layer grey cloth; s3, special sizing and calendaring finishing processes; s4, preparing a bottom fabric; s5, selecting a surface layer fiber material; s6, preparing a surface layer gray fabric; s7, special dyeing pretreatment and air beating finishing processes; s8, preparing a surface layer fabric; s9, cutting bottom cloth; s10, cutting surface cloth; s11, selecting sewing threads; and S12, sewing the product. According to the preparation method of the completely degradable baby saliva towel, the three-layer structure of the traditional saliva towel product is changed into the two-layer structure, so that the thickness is thinner, softer and lighter, and the pressure on a baby can be relieved; the prepared baby saliva towel has excellent waterproof performance, air permeability, hydrophilic performance and biodegradability, and has soft and comfortable hand feeling, no hair fiber falling and no peculiar smell generation; all adopt biodegradable materials, improve the comprehensive performance of the products.

Description

Preparation method of completely degradable baby saliva towel

Technical Field

The invention relates to the technical field of baby product manufacturing, in particular to a preparation method of a completely degradable baby saliva towel.

Background

The saliva towel is a necessary article for infants before the age of two years, the function of salivary gland secretion system of the newborn infant before four months is not complete enough, the saliva secretion amount is small, the saliva generally cannot flow, but the saliva towel is necessary to be used when feeding milk; saliva secretion of babies of four to six months is increased, but the ability of the babies to swallow saliva is not formed at the moment, and excessive saliva flows out from the corner of the mouth involuntarily, which is a normal physiological phenomenon. Because saliva is acidic, contains some digestive enzymes and other substances, and has a certain stimulation effect on skin, parents need to wipe the saliva at the mouth edge of a baby frequently to protect the skin at the chin and the neck and prevent the saliva and milk from polluting clothes, and the saliva towel is frequently used at high frequency; meanwhile, as the saliva towel needs to be hung on the neck, a heavy and thick saliva towel cannot be used in order to not burden the infant. Therefore, the soft comfort performance, the light and thin air permeability and the waterproof and antibacterial functions of the saliva towel are very interesting product quality indexes for consumers.

Conventional saliva towels are typically made from a material comprising a waterproof material, and generally consist of a three-layer structure: the first layer is a cotton surface layer, which can accelerate the rapid diffusion of liquid, is helpful for instant absorption and prevents side leakage; the second layer is a strong waterproof core layer of high molecular polymer; the third layer is a cotton bottom layer. All the existing saliva towel products need to have the functions of surface layer water absorption and middle water prevention, so that the saliva towel products need to have a structure with more than 3 layers, and the problem of thicker product thickness always exists.

The production process of the traditional high-grade baby bibs generally comprises the steps of firstly compounding an intermediate layer (a chemical material waterproof layer) and a bottom layer (pure cotton woven or knitted fabric) into a whole to obtain a composite fabric; selecting a surface layer cloth (woven or knitted pure cotton material); then, respectively cutting the composite cloth and the surface layer cloth according to the design process requirements of the style; and finally, sewing the three layers of materials together according to the sequence that the surface layer cloth is arranged on the upper layer and one surface of the bottom layer of the composite cloth is arranged on the lower layer, so as to prepare the baby saliva towel finished product.

The oral liquid towel product produced by the prior art has thick or light chemical peculiar smell even if the formaldehyde does not exceed the standard, and is not beneficial to the healthy growth of babies. The odor is generated by using a chemical adhesive film material in the middle layer of the saliva towel, and in order to meet the requirement of the saliva towel on the waterproof function, the prior art adopts methods such as a composite adhesive or a hot melt film and the like, so that the method can not avoid the odor remaining on the cloth while solving the waterproof function, and simultaneously prevent the air permeability of the original air permeable cloth.

In addition, most of the traditional saliva towel products are sewn by selecting polyester sewing threads with high strength, and chemical adhesive film materials are used in the middle layer, so that the materials cannot be biodegraded, and the prepared products have the problem of poor environmental protection performance.

The more general problem also comprises the problem of water absorption performance of surface layer cloth of the saliva towel product, in order to achieve the good water absorption performance of soft hand feeling and second absorption of the cloth, the prior art adopts a method of weak twisting yarn and a method of adding hydrophilic chemical additives in the after-treatment of the cloth, the method of adopting the weak twisting yarn can cause the problem of hair fiber falling in the using process of the saliva towel product, and the method of adding the hydrophilic chemical additives in the after-treatment is realized by depending on the chemical additives, and the safety and the health performance of the baby in use can be seriously influenced.

In conclusion, the traditional saliva towel still feels thicker and not light and thin enough for the young parents to care for the baby in the modern time due to the three layers; meanwhile, a waterproof film layer is needed to solve the waterproof problem, the waterproof film layer is a chemical product, and the saliva towels produced by the material in the current market have peculiar smell and allergy problems which are dangerous to the health of the babies; in addition, the pure cotton cloth is selected as the surface layer cloth, the natural material is very good, but the pure cotton cloth contains much hair and dust, so that the pure cotton cloth is easy to be absorbed by babies when in use, influences the respiratory tract health, and has larger harm to the babies with dust allergic constitution. How to meet the waterproof function and can accomplish more frivolous, more soft again, can overcome the peculiar smell harm that traditional saliva piece of cloth product used chemical waterproof material to cause and the pollution problem of chemical product to the environment again, can also solve the dust harm problem of cloth in traditional saliva piece of cloth use simultaneously, has become the big difficult problem that puzzles this trade at present, still does not have the solution to appear so far.

Therefore, how to provide a preparation method of a completely degradable baby saliva towel is a problem which needs to be solved urgently by the technical personnel in the field.

Disclosure of Invention

In view of the above, the invention aims to provide a preparation method of a completely degradable baby napkin, which can solve the problems of water resistance, but air impermeability, heavy weight, but not enough hydrophilic, not enough soft, lint shedding, peculiar smell and environmental protection of the napkin product produced by the prior art by adopting a novel method capable of realizing a waterproof function and a biodegradable material and a natural healthy physical finishing method through a specific process flow, and ensures that the baby napkin product has excellent waterproof performance, air permeability, hydrophilic performance and biodegradable performance, soft and comfortable hand feeling, no lint shedding and no peculiar smell.

In order to achieve the purpose, the invention adopts the following technical scheme:

a preparation method of a completely degradable baby saliva towel comprises the following steps:

(1) selecting polylactic acid short fibers as a bottom layer fiber material, producing woven fabric or knitted fabric by using the polylactic acid short fibers as bottom layer grey fabric, treating the bottom layer grey fabric by using a special sizing and calendaring finishing process, and performing after-finishing according to the sequence of open-width washing, drying, sizing and calendaring pre-shrinking to prepare bottom layer cloth;

(2) selecting biodegradable fiber F1 as a surface layer fiber material, producing woven fabric or knitted fabric by using the biodegradable fiber F1 as surface layer grey fabric, treating the surface layer grey fabric by using a special dyeing pretreatment and air beating finishing process, and carrying out dyeing and finishing production according to the sequence of dyeing pretreatment, dyeing, loose drying, sizing, air beating physical finishing and preshrinking to prepare surface layer cloth;

(3) cutting the bottom layer cloth and the surface layer cloth obtained in the steps (1) and (2) according to the design of the style, selecting biodegradable fiber F2, spinning into single yarn, using the synthetic 2-ply or 3-ply yarn as sewing thread, and sewing the cut bottom layer cloth and the cut surface layer cloth through the sewing thread to obtain the completely degradable baby saliva towel.

The technical effect of adopting the technical scheme is as follows: the invention depends on the natural characteristic of the environment-friendly material, adopts a new method capable of realizing the waterproof function to replace the traditional method for realizing the waterproof function by using a composite adhesive or a hot melt film and the like by optimizing the process flow, adopts 100 percent of biodegradable material and adopts a natural healthy physical finishing method to replace the traditional method for realizing the water absorption performance, realizes that the baby oral water towel product can simultaneously have excellent waterproof performance, air permeability, hydrophilic performance and biodegradable performance, and the product has soft and comfortable hand feeling, does not drop wool fiber and does not generate peculiar smell, and adopts 100 percent of biodegradable material together with sewing threads, thereby further improving the overall excellent comprehensive performance of the product. According to the preparation method of the baby saliva towel, the prepared surface layer cloth absorbs water at an ultrafast second, is dust-free, soft, breathable and comfortable, and the prepared bottom layer cloth is waterproof, breathable and free of any peculiar smell, has a natural antibacterial function, and is comfortable and skin-friendly; meanwhile, the finished product is changed from 3 layers to 2 layers, so that the thickness is thinner, softer and lighter, and the pressure on the baby can be relieved.

Preferably, in the step (1), the polylactic acid short fiber has a fineness specification of 1.0 to 2.24dtex and a length specification of 38 to 51 mm.

Preferably, in step (1), the polylactic acid staple fibers are 100% polylactic acid corn fibers.

The technical effect of adopting the technical scheme is as follows: the bottom layer fiber material can only select one fiber, and can not be blended or interwoven with any other fiber, the bottom layer fiber is 100% polylactic acid corn fiber, belongs to polylactic acid short fiber, and does not comprise polylactic acid fiber filament material. The polylactic acid fiber filament material has no hairiness on the surface, and cannot play a role in water prevention even if the later method is continuously adopted, and 100 percent of polylactic acid short fiber material is slightly melted after special shaping and calendaring treatment to form a fiber film to play a role in water prevention, so that the bottom cloth with the water prevention function can be produced. The bottom cloth produced by selecting 100% polylactic acid corn fiber with the fineness specification of 1.0-2.24dtex and the length specification of 38-51mm has excellent waterproof function.

Preferably, in step (1), the woven fabric is prepared by the following process: the polylactic acid fiber short fiber is used for pure spinning to obtain yarn with the yarn count ranging from 26s to 80s, and then the yarn is made into bottom layer woven fabric gray fabric on an air jet or rapier loom, wherein the fabric texture is light, thin and compact 1/1 plain weave.

Preferably, in the step (1), the knitted fabric is prepared by the following processes: the polylactic acid fiber short fiber is used for pure spinning yarns, the yarn count range is 26-80s, then the bottom layer knitted fabric grey cloth is manufactured on a weft circular knitting machine or a warp knitting machine, and the fabric tissue is light, thin and compact single-side stable tissue.

Preferably, in step (1), the special sizing and calendering finishing process is: adding a water-repellent softening agent into a cloth liquid inlet tank of the setting machine, wherein the dosage is 50-100 g/L; setting the setting temperature range to be 150-170 ℃ and the setting machine hot air quantity range to be 80-100%; and simultaneously, in cooperation with a calendering process, calendering the fabric by using a knitting calendering pre-shrinking machine at the calendering temperature of 130-145 ℃.

The technical effect of adopting the technical scheme is as follows: aiming at the temperature resistance characteristics that polylactic acid fiber short fibers begin to harden at 140 ℃, are initially melted at about 150 ℃, are completely melted at 165-170 ℃ and begin to be melted after the temperature is higher than 170 ℃, the invention selects a specific sizing and calendaring finishing process: the principle of setting the temperature is that the fibers need to be melted after the fabric is shaped, the fibers are melted again due to slight heat melting to form a fiber film to play a waterproof role, and the temperature cannot be set too high to prevent the fabric from hardening, embrittlement or melting to cause incapability of use. The setting temperature range is selected to be 150-170 ℃ according to the hand feeling requirement of the product; meanwhile, the hot air quantity needs to be opened to the maximum range of 80-100% during shaping, so that the hot air in the shaping hot air box can be uniformly distributed at each position in the box, and the film forming effect and the waterproof effect of the left side and the right side of the shaped cloth, the middle of the cloth and each position in front and at the back of the cloth are uniform and consistent; meanwhile, a calendering process is matched, the calendering temperature is 130-145 ℃, gaps among fibers in the cloth are further flattened and compacted through a knitting calendering pre-compressor, and the waterproof function of the cloth is further improved.

Preferably, the water repellent softening agent is amino modified silicone oil, preferably aminoethyl aminopropyl silicone oil with good water and oil repellent effects, the relative molecular mass of the aminoethyl aminopropyl silicone oil is more than 30 ten thousand, and the viscosity of the aminoethyl aminopropyl silicone oil is 10⁶cSt or more.

Preferably, in the step (1), the drying temperature is in the range of 100-140 ℃, so that the cloth is ensured not to have a waterproof function during drying.

Preferably, in the step (2), the degradable fiber F1 is a blended fiber of one or both of natural fiber and cellulose fiber.

Preferably, in the step (2), the degradable fiber F1 is the degradable fiber F1 which is a blended fiber, wherein the weight ratio of the pure cotton fiber is 50-100%. Further, the pure cotton fiber is blended with other natural fibers and cellulose fibers except the pure cotton fiber.

The technical effect of adopting the technical scheme is as follows: the surface layer fiber is hydrophilic and biodegradable fiber, so that after special dyeing pretreatment and air beating finishing of the post-process, the finished product can meet the requirements of softness, water absorption per second, air permeability, comfort and 100% biodegradability.

Preferably, in the step (2), the woven fabric is prepared by the following process: pure cotton fibers are spun or blended with other fibers to spin yarns, the yarn count ranges from 26s to 80s, then surface layer woven fabric gray cloth is manufactured on an air jet or rapier loom, and the fabric texture is light and thin 1/1 plain weave or twill weave.

Preferably, in the step (2), the knitted fabric is prepared by the following process: spinning yarn by pure cotton fiber or blending with other fibers, wherein the yarn count is in the range of 26-80s, and then manufacturing surface layer knitted cloth grey cloth on a weft circular knitting machine or a warp knitting machine, wherein the fabric tissue is light and thin single-side plain weave or double-side weave.

Preferably, in step (2), the special pre-dyeing and air-flap finishing processes are: the pre-dyeing treatment process is characterized in that the capillary effect climbing index of the treated cloth reaches more than 17cm, meanwhile, the cloth is shaped without chemical additives after pre-dyeing treatment, dyeing and loose drying, and then the cloth is fed into the cloth through a dry cloth and is flapped at normal temperature, wherein the air volume is 80-100%, and the speed is 8-30 m/min.

Preferably, the special dyeing pretreatment increases the dosage of treatment reagents of the dyeing pretreatment, wherein 10-20mL/kg of hydrogen peroxide, 25-50mL/kg of caustic soda, 5-8mL/kg of hydrogen peroxide stabilizer, 10-15mL/kg of alkaline oil and 5-10mL/kg of chelating agent are added to meet the requirement that the capillary effect climbing index of the pretreated cloth reaches more than 17 cm.

The technical effect of adopting the technical scheme is as follows: the dyeing pretreatment process needs to meet the requirement that the capillary effect climbing index of the pretreated cloth reaches more than 17cm, the increase of the dosage of a treatment reagent is a necessary condition for realizing the capillary effect climbing index, the conventional dyeing pretreatment reagent generally cannot reach the required capillary effect climbing index, and the special air beating physical finishing realizes the dust-free problem that the dust on the cloth falls, is beaten out and blown off to solve the problem of the cloth, and also beats loose the structure of the cloth to realize the functions of softness, water absorption in seconds, ventilation and comfort at the same time.

Preferably, in the step (3), the biodegradable fiber F2 is one of a staple fiber of 100% polylactic acid fiber, a filament of 100% polylactic acid fiber, or the biodegradable fiber F2 is a blend fiber of polylactic acid staple fiber and pure cotton fiber.

Preferably, the staple fibers of 100% polylactic acid fibers are spun into yarns with the yarn count range of: firstly spinning into single yarn within 40-60 s, then synthesizing 2 strands or 3 strands of yarn and sewing;

the filaments of the 100% polylactic acid fibers are subjected to weak twisting, the twist range is 3-5T/cm, and the thickness range of the filaments is 100-300D;

the blended fiber of the polylactic acid short fibers and the pure cotton fibers is a yarn formed by blending the polylactic acid short fibers and the pure cotton fibers, wherein the weight ratio of the polylactic acid short fibers is 50-100%, and the yarn count range is as follows: firstly spinning into single yarn within the range of 40-60 s, then synthesizing 2 strands or 3 strands of yarn and then sewing.

The technical effect of adopting the technical scheme is as follows: the sewing thread is biodegradable fiber, so that the overall excellent comprehensive performance of the product is provided, and the sewing thread and other materials are all environment-friendly materials and can be 100 percent biodegradable.

The invention also provides the baby saliva towel prepared by the preparation method of the completely degradable baby saliva towel.

According to the technical scheme, compared with the prior art, the invention discloses a preparation method of a completely degradable baby saliva towel, which has the following technical effects:

(1) the invention adopts special sizing and press polish finishing process, the temperature setting principle is that the fiber needs to be melted after the fabric is sized, and the fiber are melted together again due to slight melting, so that a layer of fiber film is formed to play a role in water resistance; hot air in the shaping hot air box can be uniformly distributed at each position in the box, so that the film forming effect and the waterproof effect of the left side and the right side of the shaped cloth, the middle of the cloth and each position in front and at back of the cloth are uniform and consistent; the gaps among the fibers in the cloth are further flattened and compacted through the knitting calendaring pre-shrinking machine, so that the waterproof function of the cloth is further improved.

(2) The invention adopts special dyeing pretreatment and air flapping finishing processes, the dyeing pretreatment process needs to meet the requirement that the capillary effect climbing index of the pretreated cloth reaches more than 17cm, and through the special air flapping physical finishing, the problem that the dust on the cloth is fallen, the fiber is knocked out and blown off to solve the dust-free problem of the cloth, and the structure of the cloth is knocked loose, so that the functions of softness, water absorption in seconds, air permeability and comfort are realized at the same time.

(3) The bottom layer fiber selected by the invention is only one fiber, is polylactic acid short fiber and is a key material for producing the bottom layer fabric with the waterproof function; the surface layer fiber selected by the invention is biodegradable fiber, and one or more of natural fiber and cellulose fiber can be selected; the sewing thread selected by the invention is biodegradable fiber, and can be one of yarns spun by 100% of polylactic acid fiber short fiber, long yarns of polylactic acid fiber, and yarns blended by polylactic acid short fiber and pure cotton fiber; the three fibers are all biodegradable fibers, so that the biodegradability of the baby saliva towel product is realized.

(4) The baby napkin prepared by the preparation method provided by the invention has excellent waterproof performance of the bottom layer and excellent second water absorption hydrophilic performance, air permeability and softness and comfort performance of the surface layer, the upper layer and the lower layer of the finished product of the whole napkin are excellent in prevention and use performance, the product is light and thin, the extra burden of the traditional thick napkin on babies is reduced, the product does not drop wool fiber and hair dust, the harm to the respiratory tract of babies is reduced, the occurrence of related allergy phenomena is avoided, the product has no peculiar smell, the problems of peculiar smell and allergy remained in a chemical waterproof film layer used for waterproofing in the traditional method can be solved, meanwhile, the product has excellent biodegradable performance, and an environment-friendly production mode is provided for the sustainable development of the industry.

(5) According to the completely degradable baby saliva towel prepared by the invention, the biodegradation time of the saliva towel finished product is only 20 months, the biodegradable proportion is 100%, the surface layer water absorption test of the saliva towel finished product is within 1 second, and the antibacterial rate index of the bottom layer cloth is as follows: the bacteriostasis rate of the golden yellow glucose bacteria is 99 percent, the bacteriostasis rate of the escherichia coli is 90 percent, the bacteriostasis rate of the candida albicans is 85 percent, and the bacteriostasis rate of the klebsiella pneumoniae is more than 99 percent, which all meet the AAA level national standard detection requirement.

(6) The saliva towel product produced by the invention provides a high-quality saliva towel product for the infant product market, and is particularly suitable for being purchased by consumers with higher requirements on living quality to babies. The method is novel and ingenious, has outstanding product performance and has wide application prospect.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

FIG. 1 is a flow chart of the manufacturing process of the method for producing a completely degradable baby saliva towel of the present invention.

Fig. 2 is a product structure diagram of a preparation method of a completely degradable baby saliva towel.

Wherein, 1 is surface cloth; 2, bottom cloth; and 3 is sewing thread.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The embodiment of the invention provides a preparation method of a completely degradable baby saliva towel, the process flow is shown in figure 1, and the steps are as follows: s1, selecting a bottom layer fiber material; s2, preparing a bottom layer gray fabric; s3, special sizing and calendaring finishing processes; s4, preparing a bottom fabric; s5, selecting a surface layer fiber material; s6, preparing a surface layer gray fabric; s7, special dyeing pretreatment and air beating finishing processes; s8, preparing a surface layer fabric; s9, cutting bottom cloth; s10, cutting surface cloth; s11, selecting sewing threads; and S12, sewing the product.

In order to optimize the above technical solution, the bottom layer fiber material is selected in step S1: only one fiber can be selected, and no other fiber of any kind can be blended or interwoven, the bottom layer fiber is 100% polylactic acid corn fiber, belongs to polylactic acid short fiber, does not comprise polylactic acid fiber filament material, and has the fineness specification of 1.0-2.24dtex and the length specification of 38-51 m. The polylactic acid fiber filament material further has no hairiness on the surface of the material cloth, and cannot play a role in water resistance even if the latter method is continuously adopted; and 100% polylactic acid short fiber material can produce bottom cloth with waterproof function by continuously adopting the preparation method of the later process.

In order to optimize the above technical solution, the bottom layer gray fabric is manufactured in step S2: 100% of the polylactic acid fiber short fibers obtained in the step S1 are selected as materials to produce the required woven fabric or knitted fabric, when the fabric type is woven fabric, the polylactic acid fiber short fibers are utilized to carry out pure spinning to obtain yarns, the yarn count range is 26-80S, then the bottom woven fabric gray fabric is manufactured on an air jet or rapier loom, and the fabric texture is the lightest and compact 1/1 plain weave; when the type of the cloth is knitted cloth, the polylactic acid fiber short fiber is utilized to carry out pure spinning to obtain yarn, the yarn count range is 26-80s, then the bottom layer knitted cloth grey cloth is manufactured on a weft circular knitting machine or a warp knitting machine, and the fabric tissue is the lightest and compact single-side plain weave tissue.

In order to optimize the above technical solution, the special sizing and calendering finishing process in step S3: aiming at the temperature resistance characteristics that polylactic acid fiber short fiber begins to harden at 140 ℃, is initially melted at about 150 ℃, is completely melted at 165-170 ℃ and begins to be melted after the temperature is higher than 170 ℃, the invention selects a special sizing and calendaring finishing process: the temperature setting principle is that fibers are required to be hot-melted after the fabric is shaped, the fibers are re-melted together due to slight hot melting, a fiber film is formed, the waterproof effect is achieved, the temperature cannot be set to be too high so as to prevent the fabric from hardening, embrittlement or melting and being incapable of being used, a proper amount of water-repellent softening agent is added into a fabric liquid inlet tank of the shaping machine, the using amount ranges from 50 g/L to 100g/L, the water-repellent softening agent is aminoethyl aminopropyl silicone oil with good water-repellent and oil-repellent effects, the relative molecular mass of the aminoethyl aminopropyl silicone oil is more than 30 ten thousand, the viscosity is more than 106cSt, and the preferable shaping temperature range is selected to be 150-170 ℃ according to the hand feeling requirement of the product; meanwhile, the hot air quantity needs to be opened to the maximum range of 80-100% during shaping, and hot air in the shaping hot air box can be uniformly distributed at each position in the box, so that the film forming effect and the waterproof effect of the left side and the right side of the shaped cloth and the film forming effect and the waterproof effect of the middle and the front and rear positions of the cloth are uniform and consistent. Meanwhile, the calendering process is matched, gaps among fibers in the cloth are further flattened and compacted through a knitting calendering pre-shrinking machine, the waterproof function of the cloth is further improved, and the calendering temperature is 130-145 ℃.

In order to optimize the above technical solution, the bottom fabric is manufactured in step S4: by using the special sizing and calendaring finishing process of the step S3, the bottom layer grey cloth manufactured in the step S2 is as follows: after-finishing in the sequence of open width water washing, drying, shaping, calendaring and preshrinking, the bottom finished fabric is made and used for the position of the bottom fabric of the 2-opening water towel shown in the attached figure 2. The bottom cloth is non-absorbent, waterproof, free of peculiar smell, natural and antibacterial, comfortable, skin-friendly and capable of being biodegraded by 100%. Furthermore, the drying temperature range is 100-140 ℃, and the cloth is ensured not to have a waterproof function during drying. The finished product cloth of the bottom cloth has the following antibacterial rate indexes through detection: the bacteriostasis rates of the golden yellow glucose bacteria and the colibacillus are respectively 99%, 90%, 85% and more than 99%, respectively, and all meet the AAA national standard detection requirement.

In order to optimize the above technical solution, the material of the facing layer fiber selected in step S5 must be biodegradable fiber, and one or more of natural fiber and cellulose fiber can be selected, and the preferable solution is: the pure cotton fibers, other natural fibers except the pure cotton fibers and cellulose fibers are selected for blending, wherein the weight ratio of the pure cotton fibers is 50-100%.

In order to optimize the technical scheme, the surface layer grey cloth is manufactured in the step S6, the fibers in the step S5 are selected as materials, when the cloth type is woven fabric, pure cotton fibers are used for spinning yarns in a pure spinning mode or blended spinning mode with other fibers, the yarn count range is 26-80S, then the surface layer woven fabric grey cloth is manufactured on an air jet or rapier loom, and the fabric texture is lighter and thinner 1/1 plain weave or twill weave; when the type of the fabric is knitted fabric, pure cotton fiber is used for spinning pure cotton or blended with other fibers to spin yarn with the yarn count range of 26-80s, then surface layer knitted fabric gray fabric is manufactured on a weft circular knitting machine or a warp knitting machine, and the fabric tissue is relatively light and thin single-side plain weave or double-side weave.

In order to optimize the above technical solution, the special dyeing pretreatment and air-flap finishing process in step S7: in order to realize that the surface cloth has the functions of dust-free, softness, water absorption in seconds, ventilation and comfort, the invention selects a special dyeing pretreatment and air flapping finishing: the dyeing pretreatment process needs to meet the requirement that the capillary effect climbing index of the pretreated cloth reaches more than 17 cm; meanwhile, after dyeing pretreatment, dyeing and loose drying, the fabric is shaped without adding any chemical additive, the fabric directly used for the baby wiping nozzle cannot contain any chemical additive, the fabric must pass through an air beating process, physical finishing is beaten through the special air, the fabric is fed into the dry fabric, the fabric is beaten at normal temperature, the air quantity range is 80-100%, the speed range is 8-30 m/min, the problem that the fluff dust on the fabric is broken off, the fluff dust is beaten out and blown off to solve the dust-free problem of the fabric is solved, and the structure of the fabric is beaten loose, so that the functions of softness, water absorption in seconds, ventilation and comfort are realized simultaneously.

In order to optimize the above technical solution, step S8 is to make a top fabric: by using the special dyeing pretreatment and air beating finishing process of the step S7, the surface layer gray fabric manufactured in the step S6 is prepared according to the following steps: dyeing and finishing production is carried out in the sequence of dyeing pretreatment, dyeing, loose drying, sizing, air beating physical finishing and preshrinking to prepare finished fabric of the surface layer, and the finished fabric is used for the position of the surface layer fabric of the 1-opening water towel shown in the attached figure 2. The finished fabric realizes that the surface layer fabric has the functions of dust-free, softness, water absorption per second, ventilation and comfort, and has no peculiar smell. The biodegradability of the cloth is 100% biodegradable, and the water absorption test is within 1 second.

And then, according to the style design process requirements, cutting the bottom layer cloth in the step S9 and cutting the surface layer cloth in the step S10 to finish the manufacture of the cut pieces before sewing.

In order to optimize the above technical solution, in step S11, a sewing thread is selected: the polylactic acid fiber is biodegradable fiber, and can be selected from 100% polylactic acid fiber short fiber or polylactic acid fiber filament, or selected from polylactic acid short fiber and pure cotton fiber mixed fiber, wherein the weight ratio of the polylactic acid short fiber is 50-100%. When a short fiber scheme of 100% polylactic acid fiber is selected, the spun yarn has the yarn count range: firstly spinning into single yarn within the range of 40-60 s, then synthesizing 2 strands or 3 strands of strand yarn, and then sewing; when filaments of 100% polylactic acid fibers are selected, the thickness range of the filaments is 100-300D, the filaments of the polylactic acid fibers are further twisted to improve the strength of the sewing thread, the twisting is weak twisting, and the twist range is 3-5T/cm; when the mixed fiber of the polylactic acid short fiber and the pure cotton fiber is selected, the yarn formed by blending the polylactic acid short fiber and the pure cotton fiber has the yarn count range: the single yarn is spun into single yarn within the range of 40-60 s, then 2 strands or 3 strands of yarn are synthesized and then sewn, and the single yarn is used for the sewing thread position of the 3-opening water towel shown in the attached figure 2, so that the materials including the sewing thread are all environment-friendly materials and can be biodegraded by 100%.

And finally, sewing the product in the step S12 by using the biodegradable sewing thread material selected in the step S11 to prepare the completely degradable baby saliva towel product. The biological degradation time of the finished product of the saliva towel is only 20 months through detection, and the biological degradation proportion is 100 percent.

Example 1

The embodiment provides a preparation method of a completely degradable baby saliva towel, which comprises the following steps:

s1, selecting a bottom layer fiber material: only one kind of fiber, 100% polylactic acid fiber, with fineness specification of 1.0dtex and length specification of 38mm can be selected.

S2, preparing a bottom layer gray fabric: pure spinning is carried out on 100% of polylactic acid fiber short fibers which are optimized in the first step by utilizing the polylactic acid fiber short fibers to obtain yarns with the yarn count of 80s, and then a bottom layer woven fabric gray fabric is manufactured on a rapier loom, wherein the fabric weave is 1/1 plain weave.

S3, special sizing and calendering finishing process: adding a proper amount of water-repellent softening agent into a cloth liquid inlet tank of the setting machine, wherein the dosage is 100g/L, the water-repellent softening agent is aminoethyl aminopropyl silicone oil with good water-repellent and oil-repellent effects, the relative molecular mass of the aminoethyl aminopropyl silicone oil is 30, and the viscosity of the aminoethyl aminopropyl silicone oil is 10⁶cSt, setting the setting temperature to 170 ℃ and the hot air quantity of the setting machine to 80%; meanwhile, in cooperation with a calendering process, calendering the fabric by a calendering pre-compressor at the calendering temperature of 140 ℃.

S4, preparing a bottom cloth: and (3) by utilizing a third step of preferably selecting a special sizing and calendaring finishing process, the bottom layer grey fabric prepared in the second step is prepared according to the following steps: carrying out after-treatment on the cloth in the sequence of open width washing, drying, shaping and calendaring and preshrinking to prepare finished cloth of bottom cloth, and further, ensuring that the cloth does not have a waterproof function during drying at the drying temperature of 140 ℃.

The finished product cloth of the bottom cloth has the following antibacterial rate indexes through detection: the bacteriostasis rate of the golden yellow glucose bacteria is 99 percent, the bacteriostasis rate of the escherichia coli is 90 percent, the bacteriostasis rate of the candida albicans is 85 percent, and the bacteriostasis rate of the klebsiella pneumoniae is more than 99 percent, which all meet the AAA level national standard detection requirement.

S5, selecting a surface layer fiber material: biodegradable fiber is selected, and the weight ratio of pure cotton fiber is 50% and the weight ratio of bamboo fiber is 50% to be blended.

S6, preparing a surface layer gray fabric: selecting the preferred fiber material in the fifth step, blending by using the blending ratio of 50% of pure cotton fiber and 50% of bamboo fiber, spinning yarn with yarn count of 26s, and then preparing face layer woven fabric gray fabric on an air jet loom, wherein the fabric tissue is 1/1 plain weave.

S7, special dyeing pretreatment and air beating finishing processes: selecting a dyeing pretreatment process: 10mL/kg of hydrogen peroxide, 25mL/kg of caustic soda, 5mL/kg of hydrogen peroxide stabilizer, 10mL/kg of alkaline oil and 5mL/kg of chelating agent so as to meet the requirement that the capillary effect climbing index of the pretreated cloth reaches 17 cm; through dyeing pretreatment, dyeing, loose formula is dried after, do not add the design arrangement of any chemical auxiliary agent, later the cloth must be through one air and pat the process, utilize the air to pat gentle complete machine and carry out a special air and pat physical arrangement, dry cloth advances cloth, the normal atmospheric temperature is patted, the amount of wind is 80%, speed is 8m/min, realized both falling fine the patting of hair dust on the cloth and the blow-suction falls the dustless problem of solving the cloth, thereby realize the softness simultaneously with the structure of cloth, second absorbs water, feel comfortable function again.

S8, preparing a surface layer fabric: and (3) utilizing the seventh special dyeing pretreatment and air beating finishing process to prepare the surface layer gray fabric prepared in the sixth step according to the following steps: dyeing and finishing are carried out in the sequence of dyeing pretreatment, dyeing, loose drying, sizing, air beating physical finishing and preshrinking to prepare finished fabric of the surface fabric, and the surface fabric has the functions of dust prevention, softness, water absorption in seconds, ventilation and comfort. The biodegradability of the cloth is 100% biodegradable, and the water absorption test is within 1 second.

S9, cutting bottom cloth: and (5) cutting according to the design process requirements of the style, and finishing the production of the cut pieces before sewing.

S10, cutting surface fabric: and (5) cutting according to the design process requirements of the style, and finishing the production of the cut pieces before sewing.

S11, selecting sewing threads: the sewing thread must be 100% biodegradable fiber, and staple fiber of 100% polylactic acid fiber can be selected to be spun into single yarn with 40s of yarn count, and then synthesized into 2 strands and then sewn. Therefore, the materials of the saliva towel product including sewing threads are all environment-friendly materials and can be biodegraded by 100 percent.

S12, sewing the product: and finally, sewing the cut bottom layer cloth and the cut surface layer cloth by using the biodegradable sewing thread material obtained in the step S11 to obtain the completely degradable baby saliva towel product. The biological degradation time of the finished product of the saliva towel is only 20 months through detection, and the biological degradation proportion is 100 percent.

Example 2

S2, preparing a bottom layer gray fabric: the polylactic acid fiber short fiber with the optimal content of 100% in the first step is subjected to pure spinning by utilizing the polylactic acid fiber short fiber to obtain yarn with the yarn count of 80s, and then the bottom layer woven fabric gray fabric is prepared on a rapier loom, and the fabric texture is 1/1 plain weave.

S3, special sizing and calendaring finishing processes: adding a proper amount of water-repellent softening agent into a cloth liquid inlet tank of the setting machine, wherein the dosage is 100g/L, the water-repellent softening agent is aminoethyl aminopropyl silicone oil with good water-repellent and oil-repellent effects, the relative molecular mass of the aminoethyl aminopropyl silicone oil is 30 ten thousand, and the viscosity of the aminoethyl aminopropyl silicone oil is 10⁶cSt, setting the setting temperature to 170 ℃ and setting the hot air quantity of the setting machine to 100%; meanwhile, in cooperation with a calendering process, calendering the fabric by a calendering pre-compressor at the calendering temperature of 145 ℃.

S4, preparing a bottom cloth: and (3) by utilizing a third step of preferably selecting a special sizing and calendaring finishing process, the bottom layer grey fabric prepared in the second step is prepared according to the following steps: and (3) carrying out after-treatment in the sequence of open width washing, drying, shaping and calendaring and preshrinking to prepare finished fabric of the bottom fabric, and further ensuring that the fabric does not have a waterproof function during drying at the drying temperature of 130 ℃.

S5, selecting a surface layer fiber material: biodegradable fibers must be selected, and pure cotton fibers with a weight ratio of 100% can be selected for pure spinning.

S6, preparing a surface layer gray fabric: selecting the preferred fiber material in the fifth step, spinning the yarn with the yarn count of 80s by pure spinning with the proportion of 100 percent of pure cotton fiber, and then preparing surface layer woven fabric grey cloth on a rapier loom, wherein the fabric texture is 2/1 twill.

S7, special dyeing pretreatment and air beating finishing processes: selecting a dyeing pretreatment process: 20mL/kg of hydrogen peroxide, 25mL/kg of caustic soda, 5mL/kg of hydrogen peroxide stabilizer, 10mL/kg of alkaline oil and 5mL/kg of chelating agent so as to meet the requirement that the capillary effect climbing index of the pretreated cloth reaches 17.5 cm; through dyeing pretreatment, dyeing, pine formula stoving back, carry out the design arrangement of not adding any chemical auxiliary agent, later the cloth must pass through one air and pat the process, utilize the air to pat gentle complete machine and carry out a special air and pat physical arrangement, dry cloth advances cloth, the room temperature is patted, the amount of wind is 100%, speed is 10m/min, realized both falling fine patting of the fine dust on the cloth and blow and inhale and fall the dustless problem of solving the cloth, thereby pat the structure of cloth loose again and realize soft, second absorb water, function comfortable that feels simultaneously.

S11, selecting sewing threads: the sewing thread is required to be 100% of biodegradable fiber, 100% of polylactic acid fiber filament with the filament thickness of 100D can be selected, the polylactic acid fiber filament is further twisted to improve the strength of the sewing thread, the twisting is weak twisting, the twist range is 5T/cm, and the sewing is carried out after the twisting. Therefore, the materials of the saliva towel product including sewing threads are all environment-friendly materials and can be biodegraded by 100 percent.

S12, sewing the product: and finally, sewing the cut bottom layer cloth and the cut surface layer cloth by using the biodegradable sewing thread material obtained in the step S11 to obtain the completely degradable baby saliva towel product. The biological degradation time of the finished product of the saliva towel only needs 20 months through detection, and the biological degradation ratio is 100 percent.

Example 3

s1, selecting a bottom layer fiber material: only one fiber, 100% polylactic acid fiber, with fineness specification of 2.24dtex and length specification of 51mm, can be selected.

S2, preparing a bottom layer gray fabric: and (3) spinning yarns by pure spinning the 100% polylactic acid fiber short fibers optimized in the first step by using the polylactic acid fiber short fibers, wherein the yarn count is 26s, and then preparing bottom layer knitted fabric gray fabric on a weft circular knitting machine, wherein the fabric weave is a single-side plain weave.

S3, special sizing and calendering finishing process: adding a proper amount of water-repellent softening agent into a cloth liquid inlet tank of the setting machine, wherein the dosage is 80g/L, the water-repellent agent is aminoethyl aminopropyl silicone oil with good water-repellent and oil-repellent effects, the relative molecular mass of the aminoethyl aminopropyl silicone oil is 30 ten thousand, and the viscosity of the aminoethyl aminopropyl silicone oil is 10⁶cSt. Setting the setting temperature to 160 ℃ and setting the hot air quantity of the setting machine to 90%; meanwhile, in cooperation with a calendering process, calendering the fabric by a calendering pre-shrinking machine at 135 ℃.

S4, preparing a bottom cloth: and (3) by utilizing a third step of preferably selecting a special sizing and calendaring finishing process, the bottom layer grey fabric prepared in the second step is prepared according to the following steps: and (3) carrying out after-treatment in the sequence of open width washing, drying, shaping and calendaring and preshrinking to prepare finished fabric of the bottom fabric, and further ensuring that the fabric does not have a waterproof function during drying at the drying temperature of 120 ℃.

S5, selecting a surface layer fiber material: biodegradable fibers must be selected, and the blend can be made by selecting 90% pure cotton fibers and 10% corn fibers by weight.

S6, preparing a surface layer gray fabric: selecting the preferred fiber material in the fifth step, blending by using the blending proportion of 90 percent of pure cotton fiber and 10 percent of corn fiber, spinning the yarn with the yarn count of 40s, and then preparing the surface layer knitted fabric gray fabric on a weft circular knitting machine, wherein the fabric tissue is a double-sided tissue.

S7, special dyeing pretreatment and air beating finishing processes: selecting a dyeing pretreatment process: 20mL/kg of hydrogen peroxide, 50mL/kg of caustic soda, 8mL/kg of hydrogen peroxide stabilizer, 15mL/kg of alkaline oil and 10mL/kg of chelating agent so as to meet the requirement that the capillary effect climbing index of the pretreated cloth reaches 18.5 cm; through dyeing pretreatment, dyeing, loose formula stoving back, carry out the design arrangement of not adding any chemical auxiliary agent, later the cloth must be through one air and pat the process, utilize the air to pat gentle complete machine and carry out a special air and pat physical arrangement, dry cloth advances cloth, the room temperature is patted, the amount of wind is 90%, speed is 15m/min, realized both falling fine patting out and the blow-suction of the fine dusty on the cloth and solved the dustless problem of cloth, thereby pat the structure of cloth loose realize soft simultaneously again, the second absorbs water, function comfortable felt.

S11, selecting sewing threads: the sewing thread must be 100% biodegradable fiber, and the staple fiber of 100% polylactic acid fiber can be selected to be spun into single yarn with 60s of yarn count, and then synthesized into 3 strands and then sewn. Therefore, the materials of the saliva towel product including sewing threads are all environment-friendly materials and can be biodegraded by 100 percent.

Example 4

s1, selecting a bottom layer fiber material: only one fiber, 100% of polylactic acid fiber, with a fineness of 1.33dtex and a length of 38mm, was selected.

S2, preparing a bottom layer gray fabric: spinning yarns with the yarn count of 50s by using the polylactic acid fiber short fibers with the optimal 100 percent of polylactic acid fiber short fibers in the first step, and then manufacturing bottom layer knitted cloth grey cloth on a weft circular knitting machine, wherein the fabric weave is a double-side plain weave.

S3, special sizing and calendaring finishing processes: adding a proper amount of water-repellent softening agent into a cloth liquid inlet tank of the setting machine, wherein the using amount of the water-repellent softening agent is 30g/L, the water-repellent softening agent is aminoethyl aminopropyl silicone oil with good water-repellent and oil-repellent effects, the relative molecular mass of the aminoethyl aminopropyl silicone oil is 30 thousands, the viscosity of the aminoethyl aminopropyl silicone oil is 106cSt, then setting the setting temperature to be 150 ℃, and setting the hot air volume of the setting machine to be 80%; meanwhile, in cooperation with a calendering process, calendering the fabric by a calendering pre-compressor at a calendering temperature of 130 ℃.

S5, selecting a surface layer fiber material: biodegradable fibers must be selected, and 50% by weight of pure cotton fibers and 50% by weight of modal fibers can be selected for blending.

S6, preparing a surface layer gray fabric: selecting the preferred fiber material in the fifth step, blending by using the blending proportion of 50% of pure cotton fiber and 50% of Modal fiber, spinning the yarn with the yarn count of 60s, and then preparing the surface layer knitted fabric gray fabric on a warp knitting machine, wherein the fabric tissue is a double-sided tissue.

S7, special dyeing pretreatment and air beating finishing processes: selecting a dyeing pretreatment process: 10mL/kg of hydrogen peroxide, 25mL/kg of caustic soda, 5mL/kg of hydrogen peroxide stabilizer, 10mL/kg of alkaline oil and 5mL/kg of chelating agent so as to meet the requirement that the capillary effect climbing index of the pretreated cloth reaches 17 cm; after dyeing pretreatment, dyeing and loose drying, the sizing and finishing without adding any chemical auxiliary agent are carried out, then the cloth must be subjected to an air beating process, the air beating flexible finishing machine is utilized to carry out special air beating physical finishing, the dry cloth is fed and beaten at normal temperature, the air quantity is 100%, the speed is 30m/min, the dustless problem that the cloth is not only solved by dropping the hair dust on the cloth, beating out the fiber and blowing and absorbing the fiber, but also the structure of the cloth is beaten loose, so that the functions of softness, water absorption in seconds and comfortable hand feeling are simultaneously realized.

S8, preparing a surface layer fabric: and (3) utilizing the seventh special dyeing pretreatment and air beating finishing process to prepare the surface layer grey cloth according to the sixth step: dyeing and finishing are carried out in the sequence of dyeing pretreatment, dyeing, loose drying, sizing, air beating physical finishing and preshrinking to prepare finished fabric of the surface fabric, and the surface fabric has the functions of dust prevention, softness, water absorption in seconds, ventilation and comfort. The biodegradability of the cloth is 100% biodegradable, and the water absorption test is within 1 second.

S11, selecting sewing threads: the sewing thread is required to be 100% of biodegradable fiber, 100% of polylactic acid fiber filament with the filament thickness of 300D can be selected, the polylactic acid fiber filament is further twisted to improve the strength of the sewing thread, the twist is 3T/cm, and sewing is carried out after twisting, so that the materials of the saliva towel product including the sewing thread are all environment-friendly materials and can be 100% biodegradable.

Example 5

s1, selecting a bottom layer fiber material: only one type of fiber, 100% polylactic acid fiber, is selected, the fineness specification is 1.33dtex, and the length specification is 38 mm.

S2, preparing a bottom layer gray fabric: pure spinning yarns by using polylactic acid fiber short fibers, wherein the yarn count is 32s, then preparing bottom layer knitted fabric gray fabric on a weft circular knitting machine, wherein the fabric tissue is a single-side plain weave, and the gram weight is 150g/m²。

S3, special sizing and calendaring finishing processes: adding a proper amount of water-repellent softening agent into a cloth liquid inlet tank of the setting machine, wherein the using amount of the water-repellent softening agent is 90g/L, the water-repellent softening agent is aminoethyl aminopropyl silicone oil with good water-repellent and oil-repellent effects, the relative molecular mass of the aminoethyl aminopropyl silicone oil is 30 thousands, the viscosity of the aminoethyl aminopropyl silicone oil is 106cSt, then setting the setting temperature to be 165 ℃ and the hot air volume of the setting machine to be 90%; meanwhile, in cooperation with a calendering process, calendering the fabric by a calendering pre-compressor at the calendering temperature of 140 ℃.

S4, preparing a bottom cloth: and (3) selecting a special sizing and calendaring finishing process in the third step, and processing the bottom layer grey cloth prepared in the second step according to the following steps: and (3) carrying out after-treatment in the sequence of open width washing, drying, shaping and calendaring and preshrinking to prepare finished fabric of the bottom fabric, and further ensuring that the fabric does not have a waterproof function during drying at the drying temperature of 130 ℃.

S5, selecting a surface layer fiber material: biodegradable fibers must be selected, and pure cotton fibers can be selected to be pure spun at a weight ratio of 100%.

S6, preparing a surface layer gray fabric: selecting the preferred fiber material in the fifth step, spinning yarns with the yarn count of 40s by pure spinning with the proportion of 100 percent of pure cotton fibers, and then preparing surface layer knitted fabric gray fabric on a weft circular knitting machine, wherein the fabric tissue is double-sided tissue, and the gram weight is 200g/m²。

S7, special dyeing pretreatment and air beating finishing processes: selecting a dyeing pretreatment process: 20mL/kg of hydrogen peroxide, 25mL/kg of caustic soda, 8mL/kg of hydrogen peroxide stabilizer, 15mL/kg of alkaline oil and 5mL/kg of chelating agent so as to meet the requirement that the capillary effect climbing index of the pretreated cloth reaches 17.2 cm; through dyeing pretreatment, dyeing, pine formula stoving back, carry out the design arrangement of not adding any chemical auxiliary agent, later the cloth must be through one air and pat the process, utilize the air to pat gentle complete machine and carry out a special air and pat physical arrangement, dry cloth advances cloth, the room temperature is patted, the amount of wind is 100%, speed is 15m/min, realized both falling fine patting of the fine dust on the cloth and blow and inhale and fall the dustless problem of solving the cloth, thereby pat the structure of cloth loose again and realize soft, second absorb water, function comfortable that feels simultaneously.

S8, preparing a surface layer cloth: and (3) utilizing the seventh special dyeing pretreatment and air beating finishing process to prepare the surface layer grey cloth according to the sixth step: dyeing and finishing are carried out in the sequence of dyeing pretreatment, dyeing, loose drying, sizing, air beating physical finishing and preshrinking to prepare finished fabric of the surface fabric, and the surface fabric has the functions of dust prevention, softness, water absorption in seconds, ventilation and comfort. The biodegradability of the cloth is 100% biodegradable, and the water absorption test is within 1 second.

S11, selecting sewing threads: the sewing thread is required to be 100% of biodegradable fiber, 100% of polylactic acid fiber filament can be selected, the filament thickness is 250D, the polylactic acid fiber filament is further twisted to improve the strength of the sewing thread, the twist is 3T/cm, and sewing is carried out after twisting, so that the materials of the saliva towel product including the sewing thread are all environment-friendly materials and can be 100% biodegradable.

Example 6

S2, preparing a bottom layer grey cloth: pure spinning is carried out by utilizing polylactic acid fiber short fiber to spin yarn with yarn count of 32s, then bottom layer knitted fabric grey cloth is manufactured on a weft circular knitting machine, the fabric tissue is single-side plain weave, and the gram weight is 150g/m²。

S4, preparing a bottom cloth: and (3) by utilizing a third step of preferably selecting a special sizing and calendaring finishing process, the bottom layer grey fabric prepared in the second step is prepared according to the following steps: carrying out after-treatment on the cloth in the sequence of open width washing, drying, shaping and calendaring and preshrinking to prepare finished cloth of bottom cloth, and further, ensuring that the cloth does not have a waterproof function during drying at the drying temperature of 130 ℃.

S6, preparing a surface layer gray fabric: selecting the preferred fiber material in the fifth step, spinning yarns with the yarn count of 40s by pure spinning with the proportion of 100 percent of pure cotton fibers, and then preparing surface layer knitted fabric grey cloth on a weft circular knitting machine, wherein the fabric tissue is a double-sided tissue, and the gram weight is 200g/m²。

S7, a special dyeing pretreatment and air beating finishing process: selecting a dyeing pretreatment process: 20mL/kg of hydrogen peroxide, 25mL/kg of caustic soda, 8mL/kg of hydrogen peroxide stabilizer, 15mL/kg of alkaline oil and 5mL/kg of chelating agent so as to meet the requirement that the capillary effect climbing index of the pretreated cloth reaches 17 cm; through dyeing pretreatment, dyeing, pine formula stoving back, carry out the design arrangement of not adding any chemical auxiliary agent, later the cloth must be through one air and pat the process, utilize the air to pat gentle complete machine and carry out a special air and pat physical arrangement, dry cloth advances cloth, the room temperature is patted, the amount of wind is 100%, speed is 15m/min, realized both falling fine patting of the fine dust on the cloth and blow and inhale and fall the dustless problem of solving the cloth, thereby pat the structure of cloth loose again and realize soft, second absorb water, function comfortable that feels simultaneously.

S10, cutting surface cloth: and (5) cutting according to the design process requirements of the style, and finishing the production of the cut pieces before sewing.

S11, selecting sewing threads: the sewing thread is required to be 100% of biodegradable fiber, the polylactic acid short fiber and the pure cotton fiber can be selected to be blended to spin single yarn with the yarn count of 40s, then 2 strands of folded yarn are synthesized and then sewn, and the blending proportion is 50% of the polylactic acid short fiber and 50% of the pure cotton fiber, so that the materials of the saliva towel product including the sewing thread are all environment-friendly materials and can be 100% biodegradable.

Example 7

S3, special sizing and calendaring finishing processes: adding a proper amount of water-repellent softening agent into a cloth liquid inlet tank of the setting machine, wherein the using amount of the water-repellent softening agent is 90g/L, the water-repellent softening agent is aminoethyl aminopropyl silicone oil with good water-repellent and oil-repellent effects, the relative molecular mass of the aminoethyl aminopropyl silicone oil is 30.01 ten thousand, the viscosity of the aminoethyl aminopropyl silicone oil is 10.16cSt, then setting the setting temperature to be 165 ℃ and the hot air amount of the setting machine to be 90%; meanwhile, in cooperation with a calendering process, calendering the fabric by a calendering pre-compressor at the calendering temperature of 140 ℃.

The finished product cloth of the bottom cloth has the following antibacterial rate indexes through detection: the bacteriostasis rates of the golden yellow glucose bacteria and the colibacillus are respectively 99%, 90%, 85% and more than 99%, respectively, and all meet the AAA national standard detection requirement.

S7, special dyeing pretreatment and air beating finishing processes: selecting a dyeing pretreatment process: 20mL/kg of hydrogen peroxide, 35mL/kg of caustic soda, 8mL/kg of hydrogen peroxide stabilizer, 15mL/kg of alkaline oil and 5mL/kg of chelating agent so as to meet the requirement that the capillary effect climbing index of the pretreated cloth reaches 17.8 cm; through dyeing pretreatment, dyeing, pine formula stoving back, carry out the design arrangement of not adding any chemical auxiliary agent, later the cloth must be through one air and pat the process, utilize the air to pat gentle complete machine and carry out a special air and pat physical arrangement, dry cloth advances cloth, the room temperature is patted, the amount of wind is 100%, speed is 15m/min, realized both falling fine patting of the fine dust on the cloth and blow and inhale and fall the dustless problem of solving the cloth, thereby pat the structure of cloth loose again and realize soft, second absorb water, function comfortable that feels simultaneously.

S11, selecting sewing threads: the sewing thread is required to be 100 percent of biodegradable fiber, the polylactic acid short fiber is selected to be spun into single yarn with the yarn count of 60s in a 100 percent pure mode, then 3 strands of folded yarn are synthesized and then sewn, and therefore the fact that the materials of the saliva towel product including the sewing thread are all environment-friendly materials and can be 100 percent biodegradable is achieved.

The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.

The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A preparation method of a completely degradable baby saliva towel is characterized by comprising the following steps:

(1) selecting polylactic acid short fibers as a bottom layer fiber material, producing woven fabric or knitted fabric by using the polylactic acid short fibers as bottom layer grey fabric, treating the bottom layer grey fabric by using a special sizing and calendaring finishing process, and performing after-finishing according to the sequence of open-width washing, drying, sizing and calendaring pre-shrinking to prepare bottom layer cloth; the special sizing and calendaring finishing process comprises the following steps: adding a water-repellent softening agent into a cloth liquid inlet tank of the setting machine, wherein the dosage is 50-100 g/L; setting the setting temperature to be 150-170 ℃ and the setting range of the hot air quantity of the setting machine to be 80-100%; meanwhile, in cooperation with a calendering process, calendering the fabric by a knitting calendering pre-shrinking machine at the calendering temperature of 130-145 ℃;

(2) selecting biodegradable fiber F1 as a surface layer fiber material, wherein the biodegradable fiber F1 is one or two blend fibers of natural fibers and cellulose fibers, producing woven fabric or knitted fabric as surface layer grey fabric by using the biodegradable fiber F1, performing a special dyeing pretreatment process to obtain a fabric with a capillary effect climbing index of over 17cm, dyeing, loosely drying, shaping without chemical additives, and performing dyeing and finishing production by feeding dry fabric, beating at normal temperature and preshrinking in sequence to obtain the surface layer fabric, wherein the air beating rate is 80-100%, and the speed is 8-30 m/min; wherein the special dyeing pretreatment reagent hydrogen peroxide is 10-20mL/kg, caustic soda is 25-50mL/kg, hydrogen peroxide stabilizer is 5-8mL/kg, alkaline oil is 10-15mL/kg, and chelating agent is 5-10 mL/kg;

2. The preparation method of the completely degradable baby saliva towel according to claim 1, wherein in step (1), the polylactic acid staple fibers have a fineness specification of 1.0-2.24dtex and a length specification of 38-51 mm.

3. The method for preparing a fully degradable baby saliva towel according to claim 1, wherein in step (1), the polylactic acid staple fiber is 100% polylactic acid corn fiber.

4. The method for preparing a fully degradable baby saliva towel according to claim 1, wherein in step (2), the degradable fiber F1 is a blend fiber, wherein the weight ratio of pure cotton fiber is 50-100%.

5. The method for preparing a completely degradable baby saliva towel according to claim 1, wherein in step (3), the biodegradable fiber F2 is one of staple fiber of 100% polylactic acid fiber, filament of 100% polylactic acid fiber, or the biodegradable fiber F2 is blended fiber of polylactic acid staple fiber and pure cotton fiber.

6. The preparation method of the completely degradable baby saliva towel according to claim 5, wherein the staple fibers of the 100% polylactic acid fibers are spun into yarns with the yarn count ranging from 40 to 60s, the filaments of the 100% polylactic acid fibers are subjected to weak twisting and twisting, the twist range is 3 to 5T/cm, and the filament thickness range is 100 to 300D; the blended fiber of the polylactic acid short fibers and the pure cotton fibers is yarn blended by the polylactic acid short fibers and the pure cotton fibers, wherein the weight ratio of the polylactic acid short fibers is 50-100%, and the yarn count range is 40-60 s.

7. A completely degradable baby saliva towel, which is prepared by the preparation method of the completely degradable baby saliva towel of claim 6.