CN111472180B - Adhesive interlining based on TPU (thermoplastic polyurethane) non-woven fabric, preparation method and application - Google Patents

Adhesive interlining based on TPU (thermoplastic polyurethane) non-woven fabric, preparation method and application Download PDF

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CN111472180B
CN111472180B CN202010411819.2A CN202010411819A CN111472180B CN 111472180 B CN111472180 B CN 111472180B CN 202010411819 A CN202010411819 A CN 202010411819A CN 111472180 B CN111472180 B CN 111472180B
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tpu
adhesive
woven fabric
polyurethane
powder
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CN111472180A (en
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严华荣
王爱琴
陈安意
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Zhejiang Kingsafe Interlining Co ltd
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Zhejiang Kingsafe Interlining Co ltd
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    • D—TEXTILES; PAPER
    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
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    • D06N7/00—Flexible sheet materials not otherwise provided for, e.g. textile threads, filaments, yarns or tow, glued on macromolecular material
    • D06N7/0092—Non-continuous polymer coating on the fibrous substrate, e.g. plastic dots on fabrics
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D27/00—Details of garments or of their making
    • A41D27/02—Linings
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/04—Materials specially adapted for outerwear characterised by special function or use
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/04—Materials specially adapted for outerwear characterised by special function or use
    • A41D31/10—Impermeable to liquids, e.g. waterproof; Liquid-repellent
    • A41D31/102—Waterproof and breathable
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D31/00—Materials specially adapted for outerwear
    • A41D31/04—Materials specially adapted for outerwear characterised by special function or use
    • A41D31/18—Elastic
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    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/20—Adhesives in the form of films or foils characterised by their carriers
    • C09J7/21—Paper; Textile fabrics
    • C—CHEMISTRY; METALLURGY
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    • C09J7/00—Adhesives in the form of films or foils
    • C09J7/30—Adhesives in the form of films or foils characterised by the adhesive composition
    • C09J7/35—Heat-activated
    • D—TEXTILES; PAPER
    • D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
    • D01F—CHEMICAL FEATURES IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS; APPARATUS SPECIALLY ADAPTED FOR THE MANUFACTURE OF CARBON FILAMENTS
    • D01F8/00—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof
    • D01F8/04—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers
    • D01F8/16—Conjugated, i.e. bi- or multicomponent, artificial filaments or the like; Manufacture thereof from synthetic polymers with at least one other macromolecular compound obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds as constituent
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    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0011—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using non-woven fabrics
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    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/0002—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate
    • D06N3/0015—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by the substrate using fibres of specified chemical or physical nature, e.g. natural silk
    • D06N3/0025—Rubber threads; Elastomeric fibres; Stretchable, bulked or crimped fibres; Retractable, crimpable fibres; Shrinking or stretching of fibres during manufacture; Obliquely threaded fabrics
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    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/007—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof characterised by mechanical or physical treatments
    • D06N3/0077—Embossing; Pressing of the surface; Tumbling and crumbling; Cracking; Cooling; Heating, e.g. mirror finish
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    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/125—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyamides
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    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/12—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins
    • D06N3/14—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with macromolecular compounds obtained otherwise than by reactions only involving carbon-to-carbon unsaturated bonds, e.g. gelatine proteins with polyurethanes
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    • D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
    • D06N—WALL, FLOOR, OR LIKE COVERING MATERIALS, e.g. LINOLEUM, OILCLOTH, ARTIFICIAL LEATHER, ROOFING FELT, CONSISTING OF A FIBROUS WEB COATED WITH A LAYER OF MACROMOLECULAR MATERIAL; FLEXIBLE SHEET MATERIAL NOT OTHERWISE PROVIDED FOR
    • D06N3/00—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof
    • D06N3/18—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with two layers of different macromolecular materials
    • D06N3/183—Artificial leather, oilcloth or other material obtained by covering fibrous webs with macromolecular material, e.g. resins, rubber or derivatives thereof with two layers of different macromolecular materials the layers are one next to the other
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D2500/00—Materials for garments
    • A41D2500/30—Non-woven
    • A—HUMAN NECESSITIES
    • A41—WEARING APPAREL
    • A41D—OUTERWEAR; PROTECTIVE GARMENTS; ACCESSORIES
    • A41D2600/00—Uses of garments specially adapted for specific purposes
    • A41D2600/10—Uses of garments specially adapted for specific purposes for sport activities
    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
    • C09J2475/00—Presence of polyurethane
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Abstract

The invention relates to a bonding interlining based on TPU non-woven fabric, a preparation method and application, wherein the bonding interlining comprises the TPU non-woven fabric and a double-point coating adhered to the TPU non-woven fabric; the TPU non-woven fabric is formed by a melt-blowing method through a polyurethane mixture comprising 90-95 wt% of polyester polyurethane and 5-10 wt% of polyether polyurethane, wherein the melting point of the polyester polyurethane is 180-240 ℃, and the melting point of the polyether polyurethane is 110-120 ℃; the double-point coating is formed by a slurry point powder spreading method, wherein the primer slurry is polyurethane powder-free primer slurry, and the powder adhesive is polyamide hot melt adhesive; the melting point of the polyamide hot melt adhesive is 120-135 ℃ as measured according to GB/T4608-1984, and the melt mass flow rate of the polyamide hot melt adhesive at 160 ℃ is 20-35 g/10min as measured according to GB/T3682-2018. The adhesive interlining has good elasticity, is moisture permeable and is waterproof.

Description

Adhesive interlining based on TPU (thermoplastic polyurethane) non-woven fabric, preparation method and application
Technical Field
The invention belongs to the field of garment accessories, and particularly relates to a TPU (thermoplastic polyurethane) non-woven fabric-based adhesive interlining, a preparation method and application thereof.
Background
Thermoplastic polyurethane non-woven fabric (TPU non-woven fabric) is a non-toxic and harmless environment-friendly material, has the advantages of good elasticity, light weight, moisture permeability and water resistance, has no harm to human skin, and is widely applied to the fields of garment materials, medical treatment and health, leather and the like.
The double-point coating is a coating formed on the base cloth by a double-point method, and two hot melt adhesives with different properties can be selected for combined use, wherein the lower layer adhesive is adhered with the base cloth, and the upper layer adhesive is used for adhering with the fabric, so that the formed adhesive interlining can obtain more ideal adhesive effect. The baking temperature of the double-dot coating is different due to different hot melt adhesives. For water-washed polyamide hot melt adhesives having a melting point above 100 ℃, the baking temperature for the double-dot coating is generally above 170 ℃. At such baking temperatures, TPU nonwoven fabrics suffer from poor performance due to relatively poor high temperature resistance.
Therefore, the conventional double-point coating process cannot ensure the excellent performance of the TPU non-woven fabric material, and the TPU non-woven fabric is difficult to be made into a bonding interlining for clothing.
Disclosure of Invention
In view of the above, the present invention aims to provide a bonding liner based on TPU nonwoven fabric, a preparation method and an application thereof, aiming at the technical problems existing in the prior art.
The purpose of the invention is realized by the following technical scheme.
The inventor of the application finds that the moisture permeability of the TPU non-woven fabric can be improved by adding the specific polyether polyurethane into the polyester TPU non-woven fabric under the condition of not obviously reducing the high temperature resistance; by selecting specific powder glue and primer and further controlling and adjusting parameters of a slurry point powder spreading method, the baking and sizing of the TPU non-woven fabric-based adhesive interlining can be completed at a relatively low temperature, and the obtained adhesive interlining has good elasticity, is moisture permeable, waterproof and high in peel strength, and can be used for sports clothes, casual clothes or elastic fashionable clothes.
In one aspect, the present invention provides a fusible interlining based on TPU nonwoven fabric, wherein the fusible interlining includes TPU nonwoven fabric and a double dot coating layer adhered thereto; the TPU non-woven fabric is formed by a melt-blowing method through a polyurethane mixture comprising 90-95 wt% of polyester polyurethane and 5-10 wt% of polyether polyurethane, wherein the melting point of the polyester polyurethane is 180-240 ℃, and the melting point of the polyether polyurethane is 110-120 ℃; the double-point coating is formed by a slurry point powder spreading method, wherein the primer slurry is polyurethane powder-free primer slurry, and the powder adhesive is polyamide hot melt adhesive; the melting point of the polyamide hot melt adhesive is 120-135 ℃ as measured according to GB/T4608-1984, and the melt mass flow rate of the polyamide hot melt adhesive at 160 ℃ is 20-35 g/10min as measured according to GB/T3682-2018.
The adhesive interlining has the advantages of high peel strength, good elasticity, moisture permeability and water resistance. Specifically, the TPU non-woven fabric prepared by a melt-blowing method through a polyurethane mixture containing 90-95 wt% of polyester polyurethane and 5-10 wt% of polyether polyurethane has good high-temperature resistance and improved moisture permeability. Furthermore, the adhesive interlining adopts specific powder glue and primer, polyurethane powder-free primer slurry loses cross-linking generated by hydrogen bond in polyurethane molecules after being heated to become molten mass, and the molten mass is recovered after being cooled, so that the affinity between the molten mass and the polyamide hot melt adhesive and the TPU non-woven fabric on the upper layer is good; meanwhile, polyether polyurethane contained in the TPU non-woven fabric is softened in the baking process, so that the combination with the primer can be further enhanced, and the peeling strength is further improved. In addition, the wettability and permeability of the polyamide hot melt adhesive can be improved by controlling the melting point and the mass flow rate of the melt, so that the mutual permeation with the primer can be enhanced, and the bonding (peeling strength) between the polyamide hot melt adhesive and the TPU non-woven fabric with softened polyether polyurethane can be improved. The adhesive interlining can meet the requirements of sports clothes, casual clothes, elastic fashion clothes and the like on the peel strength.
According to the adhesive liner provided by the invention, the melting point of the polyester polyurethane is 190-215 ℃.
According to the adhesive liner provided by the invention, the weight average molecular weight of the polyester polyurethane is 50000-75000 g/mol. In some embodiments, the polyester urethane is obtained from the reaction of a polyester diol, a polyisocyanate, and a chain extender.
Examples of polyester diols suitable for use in the present invention include, but are not limited to: the poly (butylene adipate) glycol and the polycaprolactone glycol have the number average molecular weight of 1000-3000 g/mol.
Examples of polyisocyanates suitable for use in the present invention include, but are not limited to, Toluene Diisocyanate (TDI), isophorone diisocyanate (IPDI) and diphenylmethane diisocyanate (MDI), preferably isophorone diisocyanate.
Examples of chain extenders suitable for use in the present invention include, but are not limited to: dimethylolpropionic acid and ethylenediamine.
According to the adhesive liner provided by the invention, the weight average molecular weight of the polyether polyurethane is 15000-20000 g/mol. In some embodiments, the polyether urethane is obtained by reacting diphenylmethane diisocyanate, polyethylene oxide dihydric alcohol and butanediol, wherein the molar ratio of the polyethylene oxide dihydric alcohol to the butanediol is preferably 1: 0.2-0.3, and the number average molecular weight of the polyethylene oxide dihydric alcohol is preferably 1000-3000 g/mol.
In one embodiment, the polyether urethane has a melting point of 112 to 116 ℃.
The adhesive interlining provided by the invention is characterized in that the area density of the TPU non-woven fabric is 50-200 g/m2Preferably 80 to 120 g/m2。
According to the bonding liner provided by the invention, the diameter of the melt-blown filament in the TPU non-woven fabric is 10-25 micrometers. By controlling the diameter of the melt-blown filaments, the inter-filament voids can be reduced at the same areal density, thereby improving water resistance.
According to the adhesive interlining provided by the invention, the water pressure resistance of the TPU non-woven fabric is 1000-2000 mm, and the moisture permeability is 4000-6000 g.m-2·(24h)-1。
In the present invention, the moisture permeability (moisture permeability) is measured according to the A method in GB/T12074-.
According to the adhesive lining provided by the invention, the polyurethane foundation-free slurry can form a lower adhesive layer of the double-point coating, and the polyamide hot melt adhesive can form an upper adhesive layer of the double-point coating. The supersize layer and the subcoize layer may be at least partially interpenetrated.
The adhesive lining provided by the invention is characterized in that based on the area of the TPU non-woven fabric, the using amount of the double-point coating is 15-20 g/m2Preferably 15 to 20 g/m2。
According to the adhesive lining provided by the invention, the particle size of the polyamide hot melt adhesive is 90-120 micrometers. Polyamide hotmelts for use in the present invention are commercially available, for example, as the PA copolyamide hotmelt adhesives available from Shanghai Tianyang hotmelt company under the types JCC-PA6150, JCC-PA6300 and JCC-PA7200, as the adhesive powder available from Feisiti (China) Polymer Co.Ltd under the type PA5424, preferably as the PA copolyamide hotmelt adhesive powder of JCC-PA6150 or as the adhesive powder available from Feisiti (China) Polymer Co.Ltd under the type PA 5424.
The adhesive interlining provided by the invention is characterized in that the polyurethane powder-free base paste is an aqueous polyurethane emulsion with a solid content of 25-28%, and the viscosity at 25 ℃ is 50-60 mPa & s. The polyurethane foundation-free slurry used in the present invention is commercially available. In some embodiments, the polyurethane foundation-free slurry may be obtained from an aqueous polyurethane emulsion having a model number of PU328-9K available from the textile auxiliary works of Thaixing, or an aqueous polyurethane-based slurry having a model number of PU-905 available from Dow textiles Inc., Nantong, Inc., and diluted.
In another aspect, the present invention provides a method for preparing a TPU nonwoven fabric-based fusible interlining, wherein the method comprises the steps of:
(a) coating the bottom slurry points on the TPU non-woven fabric by using a rotary screen;
(b) sprinkling powder adhesive on the TPU non-woven fabric coated with the primer paste points, wherein the powder adhesive is adhered to the primer paste points so as to form a hot melt adhesive layer comprising polyurethane powder-free primer paste and polyamide hot melt adhesive on the TPU non-woven fabric;
(c) stretching the TPU non-woven fabric with the hot melt adhesive layer, suspending the TPU non-woven fabric, and baking the TPU non-woven fabric in an infrared heating mode; wherein the temperature of infrared heating is 145-155 ℃.
In the preparation method, the polyamide hot melt adhesive with a specific melting point and a melt mass flow rate is selected as the powder adhesive and is used in combination with the polyurethane foundation-free slurry with a specific solid content, and the improved slurry point dusting method forms a double-point coating at a lower baking temperature, so that the excellent performance of the TPU non-woven fabric material can be guaranteed.
According to the preparation method provided by the invention, the solid content of the bottom slurry in the step (a) is 25-28%, and the viscosity at 25 ℃ is 50-60 mPa & s; the mesh number of the rotary screen is 50-60 meshes, and the thickness of the rotary screen is 120-150 micrometers.
According to the preparation method provided by the invention, the aperture of the rotary screen in the step (a) is 250-270 microns.
According to the preparation method provided by the invention, the primer slurry is an aqueous polyurethane emulsion.
According to the preparation method provided by the invention, the step (b) further comprises the step of absorbing powder to remove the powder glue which is not adhered to the bottom slurry dots.
According to the preparation method provided by the invention, the infrared heating wavelength in the step (c) is 2.5-4 microns. Without wishing to be bound by theory, it is believed that heating with infrared light of a specific wavelength facilitates migration and penetration of the hot melt adhesive, thereby improving the direct bonding performance of the TPU nonwoven fabric to the double-dot coating.
According to the preparation method provided by the invention, the baking time in the step (c) is 5-8 min.
In another aspect, the invention also provides the application of the bonding interlining based on TPU non-woven fabric or the bonding interlining prepared by the preparation method in sports clothes, leisure clothes or elastic fashion clothes.
The invention has the following advantages:
(1) the adhesive interlining based on the TPU non-woven fabric has high peel strength, good elasticity, moisture permeability and water resistance, and can be widely applied to sports clothes, casual clothes or elastic fashionable clothes.
(2) The preparation method is simple to operate and easy for industrial production.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the invention and, together with the description, serve to explain the invention and not to limit the invention.
FIG. 1 is a schematic flow diagram of one embodiment of a production process according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. 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.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
Example 1 preparation of TPU nonwoven Fabric
(1) Dehydrating polybutylene adipate diol with the number average molecular weight of 2000 g/mol for 2 h at the temperature of 100 ℃ and the vacuum degree of 0.1 MPa, then cooling to 70 ℃, adding metered isophorone diisocyanate and reacting for 1 h to obtain the polyester TPU prepolymer. Heating the prepolymer of the polyester TPU to 80 ℃, adding chain extender dimethylolpropionic acid, reacting for 3 h, and curing for 10 h at 125 ℃ to obtain the polyester polyurethane film. Wherein, -NCO/-OH =1.4 (molar ratio) in the synthesis reaction; dimethylolpropionic acid was used in an amount of 6 wt% based on the weight of the polyester type TPU prepolymer.
The weight average molecular weight of the polyester polyurethane is 68000 g/mol by adopting gel chromatography; the melting point of the alloy is measured by a thermal mechanical analysis method and is 207-212 ℃.
(2) And (3) dehydrating polyethylene oxide glycol with the number average molecular weight of 1500 g/mol for 1.5 h at the temperature of 105 ℃ and the vacuum degree of 0.1 MPa, then cooling to 50 ℃, adding metered diphenylmethane diisocyanate, heating to 80 ℃ and reacting for 1 h to obtain the polyether type TPU prepolymer. Cooling to 60 ℃, adding butanediol, stirring, heating, vacuumizing, and curing at 110 ℃ for 3 h to obtain the polyether polyurethane film. Wherein, -NCO/-OH =1.2 (molar ratio) in the synthesis reaction, and the molar ratio of the polyethylene oxide glycol to the butanediol is 1: 0.2.
Measuring the weight average molecular weight of the polyether polyurethane by adopting gel chromatography, wherein the weight average molecular weight is 18600 g/mol; the melting point of the alloy is measured by a thermal mechanical analysis method and is 112-116 ℃.
(3) The polyester polyurethane film and the polyether polyurethane film are sliced and sent into a screw extruder with the diameter of 45 mm and the length-diameter ratio of 24:1, the temperature of the melt is controlled to be 220 ℃, so that the melt is fully mixed, and the polyurethane mixture melt is obtained. And (3) enabling the polyurethane mixture melt to pass through a die head with the number of spinneret holes of 200 and the aperture of 0.25mm, blowing by adopting air flow with the temperature of 270 ℃ and the speed of 150 m/s, drawing the polyurethane mixture melt into filaments with the diameter of 10-25 micrometers, and collecting the filaments on a drum-type receiver which is arranged at a position 10 cm away from the die head to form the TPU non-woven fabric. Table 1 shows the properties of the TPU nonwoven.
TABLE 1 TPU nonwoven Properties
Figure DEST_PATH_IMAGE001
As is clear from table 1, the moisture permeability of the nonwoven fabric can be improved by incorporating polyether urethane into the nonwoven fabric, but the tendency of enhancement of the moisture permeability is reduced when the proportion of polyether urethane exceeds 10% by weight.
Example 2
Referring to fig. 1, a TPU nonwoven fabric-based adhesive backing is prepared in the following manner.
(a) The nonwoven fabric 2 prepared in example 1 was coated with dots of primer paste using a cylinder. Wherein the base stock is PU-905 aqueous polyurethane-based stock available from Tongtong Donghui textile Co., Ltd, and is diluted until the solid content is 28% and the viscosity at 25 ℃ is 58.2 mPa · s. The mesh number of the cylinder is 50 meshes, the pore diameter of the cylinder is 270 microns, and the thickness of the cylinder is 150 microns.
(b) And sprinkling powder glue on the non-woven fabric coated with the bottom slurry point, sucking powder, adhering the powder glue on the bottom slurry point, and forming a hot-melt adhesive layer comprising polyurethane powder-free bottom slurry and the powder glue on the TPU non-woven fabric. Wherein the powder rubber is a PA5424 powder rubber available from Feisiti (China) Polymer Co., Ltd, the melting range is 122-128 ℃, the melt mass flow rate at 160 ℃ is 27-33 g/10min, and the average particle size is 100 microns.
(c) Stretching the non-woven fabric with the hot melt adhesive layer, suspending the non-woven fabric, and baking for 8 min by adopting an infrared heating mode. Wherein the infrared heating wavelength is 2.5-4 microns, and the temperature is 150 +/-2 ℃.
The adhesive backing made in example 2 is designated as sample 1. The amount of the double-dot coating was measured by the weight gain method and found to be 18 g/m2。
Example 3
Referring to fig. 1, a TPU nonwoven fabric-based adhesive backing is prepared in the following manner.
(a) The nonwoven fabric 3 prepared in example 1 was coated with dots of primer paste using a cylinder. Wherein the base stock is PU-905 aqueous polyurethane-based stock available from Tongtong Dohui textiles Co., Ltd, and is diluted until the solid content is 25% and the viscosity at 25 ℃ is 51.6 mPa & s. The mesh number of the cylinder is 60 meshes, the pore diameter of the cylinder is 250 microns, and the thickness of the cylinder is 120 microns.
(b) And sprinkling powder glue on the non-woven fabric coated with the bottom slurry point, sucking powder, adhering the powder glue on the bottom slurry point, and forming a hot-melt adhesive layer comprising polyurethane powder-free bottom slurry and the powder glue on the non-woven fabric 3. Wherein the powder rubber is a PA5424 powder rubber available from Feisiti (China) Polymer Co., Ltd, the melting range is 122-128 ℃, the melt mass flow rate at 160 ℃ is 27-33 g/10min, and the average particle size is 100 microns.
(c) Stretching the non-woven fabric with the hot melt adhesive layer, suspending the non-woven fabric, and baking for 5 min by adopting an infrared heating mode. Wherein the infrared heating wavelength is 2.5-4 microns, and the temperature is 150 +/-2 ℃.
The adhesive backing made in example 3 is designated as sample 2. The amount of the double-dot coating was measured by the weight gain method and found to be 16 g/m2。
Example 4
(a) The nonwoven fabric 2 prepared in example 1 was coated with dots of primer paste using a cylinder. The base stock was a PU-905 aqueous polyurethane-based stock available from southeast donghui textiles ltd and diluted to a solid content of 33% and a viscosity of 85 mPa · s at 25 ℃. The mesh number of the cylinder is 40 meshes, the pore diameter of the cylinder is 290 microns, and the thickness of the cylinder is 180 microns.
(b) And sprinkling powder glue on the non-woven fabric coated with the bottom slurry point, sucking powder, adhering the powder glue on the bottom slurry point, and forming a hot-melt adhesive layer comprising polyurethane powder-free bottom slurry and the powder glue on the TPU non-woven fabric. Wherein the powder rubber is a PA5424 powder rubber available from Feisiti (China) Polymer Co., Ltd, the melting range is 122-128 ℃, the melt mass flow rate at 160 ℃ is 27-33 g/10min, and the average particle size is 150 microns.
(c) Stretching the non-woven fabric with the hot melt adhesive layer, suspending the non-woven fabric, and baking for 8 min by adopting an infrared heating mode. Wherein, the wavelength of infrared heating is 5.6-10 microns, and the temperature is 150 +/-2 ℃.
The adhesive backing made in example 4 is designated as sample 3. The amount of the double dot coating was measured by the weight gain method and found to be 20 g/m2。
Comparative example 1
An adhesive backing was prepared in substantially the same manner as in example 2, except that: in the step (b), WT-38 PA hot melt adhesive, which is available from Jiangyin Weitao plastics New Material Co., Ltd, is used, and the softening point is 140 ℃. The resulting adhesive backing is identified as control 1.
Comparative example 2
An adhesive backing was prepared in substantially the same manner as in example 2, except that: in step (a), the nonwoven fabric 1 and the nonwoven fabric 4 were used as base fabrics, and the obtained adhesive backings were referred to as control 2 and control 3, respectively.
Performance testing and characterization
1. Heat resistance of TPU non-woven fabric
The nonwoven fabric 3 and the nonwoven fabric 4 prepared in example 1 were treated in an oven for 10min, and the results are shown in table 2.
TABLE 2 TPU nonwoven Heat resistance
Figure 465557DEST_PATH_IMAGE002
As can be seen from table 2, the water pressure resistance and moisture permeability of the TPU nonwoven fabric decrease with the increase of the heat treatment temperature, and the performance of the nonwoven fabric can be advantageously ensured by baking the TPU nonwoven fabric at a lower temperature. In addition, it was found by comparison that when the content of the polyether urethane was 20 wt%, the high temperature resistance of the nonwoven fabric 4 was significantly reduced, as compared with the nonwoven fabric 3 (the content of the polyether urethane was 10 wt%).
2. Bond liner performance testing
The peel strength, the dry heat dimensional change and the water washing dimensional change of the adhesive lining are measured according to FZ/T80007.1-3, the dry water washing appearance change is evaluated in combination with GB/T19980-2005, the moisture permeability is measured according to the method A in GB/T12074-.
TABLE 3 performance of the adhesive interlining
Figure DEST_PATH_IMAGE003
Note: in the appearance change of dry washing, the level 4 is that slight change is carefully identified; grade 3 is the change that is clearly seen.
As can be seen from Table 3, the peel strength of the adhesive interlining of the present invention is much greater than that of controls 1-3, and the peel strength of inventive samples 1 and 2 is higher than that of sample 3. Without wishing to be bound by theory, it is believed that the reason for the low peel strength of sample 3 may be as follows: (1) in example 4, the size point formed by the size point dusting method is large, the adsorbed powder glue is concentrated, and the powder glue cannot be sufficiently combined with the primer and/or the TPU non-woven fabric in a short time, so that the double-dot coating layer of the sample 3 and the TPU non-woven fabric are not sufficiently bonded; (2) the infrared light with specific wavelength (2.5-4 microns) is adopted for heating, so that the migration and the permeation of the hot melt adhesive are facilitated, and the adhesiveness with the TPU non-woven fabric is high.
The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (15)

1. A fusible interlining based on a TPU nonwoven fabric, wherein the fusible interlining includes the TPU nonwoven fabric and a double dot coating layer adhered thereto; the TPU non-woven fabric is formed by a melt-blowing method through a polyurethane mixture comprising 90-95 wt% of polyester polyurethane and 5-10 wt% of polyether polyurethane, wherein the melting point of the polyester polyurethane is 180-240 ℃, and the melting point of the polyether polyurethane is 110-120 ℃; the double-point coating is formed by a slurry point powder spreading method, wherein the primer slurry is polyurethane powder-free primer slurry, and the powder adhesive is polyamide hot melt adhesive; the melting point of the polyamide hot melt adhesive is 120-135 ℃ measured according to GB/T4608-1984, and the melt mass flow rate of the polyamide hot melt adhesive at 160 ℃ is 20-35 g/10min measured according to GB/T3682-2018.
2. The adhesive backing of claim 1 wherein the polyester polyurethane has a weight average molecular weight of 50000 to 75000 g/mol and the polyether polyurethane has a weight average molecular weight of 15000 to 20000 g/mol;
the polyester polyurethane is obtained by reacting polyester diol, polyisocyanate and a chain extender; the polyether polyurethane is obtained by fusing and copolymerizing diphenylmethane diisocyanate, polyethylene oxide dihydric alcohol and butanediol.
3. The adhesive backing of claim 2 wherein the polyester diol is polybutylene adipate diol and/or polycaprolactone diol having a number average molecular weight of 1000-3000 g/mol; the polyisocyanate is one or more selected from toluene diisocyanate, isophorone diisocyanate and diphenylmethane diisocyanate; the chain extender is dimethylolpropionic acid and/or ethylenediamine.
4. The adhesive backing of claim 2 wherein the molar ratio of the polyethylene oxide glycol to the butanediol is 1:0.2 to 0.3 and the number average molecular weight of the polyethylene oxide glycol is 1000 to 3000 g/mol.
5. The adhesive backing of claim 1, wherein the TPU nonwoven fabric has an areal density of 50 to 200 g/m2；
The diameter of the melt-blown fibril in the TPU non-woven fabric is 10-25 microns;
the water pressure resistance of the TPU non-woven fabric is 1000-2000 mm, and the moisture permeability is 4000-6000 g.m-2·(24h)-1。
6. The adhesive backing of claim 5, wherein the TPU nonwoven fabric has an areal density of 80 to 120 g/m2。
7. The fusible interlining as claimed in any one of claims 1 to 6, wherein the double dot coating is used in an amount of 15 to 20 g/m based on the area of the TPU nonwoven fabric2。
8. The adhesive backing of any one of claims 1-6 wherein the polyamide hot melt adhesive has a particle size of 90-120 microns.
9. The adhesive backing of any one of claims 1-6 wherein the polyurethane powder-free slurry is an aqueous polyurethane emulsion having a solids content of 25-28% and a viscosity of 50-60 mPa-s at 25 ℃.
10. A method of making an adhesive backing according to any one of claims 1 to 9, wherein the method of making comprises the steps of:
(a) coating the bottom slurry points on the TPU non-woven fabric by using a rotary screen;
(b) sprinkling powder adhesive on the TPU non-woven fabric coated with the primer paste points, wherein the powder adhesive is adhered to the primer paste points so as to form a hot melt adhesive layer comprising polyurethane powder-free primer paste and polyamide hot melt adhesive on the TPU non-woven fabric;
(c) stretching the TPU non-woven fabric with the hot melt adhesive layer, suspending the TPU non-woven fabric, and baking the TPU non-woven fabric in an infrared heating mode; wherein the temperature of infrared heating is 145-155 ℃.
11. The production process according to claim 10, wherein the solid content of the base slurry in the step (a) is 25 to 28%, and the viscosity at 25 ℃ is 50 to 60 mPa-s; the mesh number of the rotary screen is 50-60 meshes, and the thickness of the rotary screen is 120-150 micrometers; the bottom slurry is aqueous polyurethane emulsion.
12. The manufacturing method according to claim 10 or 11, wherein the step (b) further comprises sucking powder to remove the powder glue which is not adhered to the foundation paste point.
13. The method according to claim 10 or 11, wherein the infrared light is heated at a wavelength of 2.5 to 4 μm.
14. The method according to claim 10 or 11, wherein the baking time in the step (c) is 5 to 8 min.
15. Use of the adhesive interlining according to any one of claims 1 to 9 or produced by the production process according to any one of claims 10 to 14 in sports apparel, leisure apparel or elastic fashion.
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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1445390A (en) * 2003-05-06 2003-10-01 东华大学 Method and equipment for making elastic nonwovens from polyurethane by melting and jetting material to form mesh
CN1570267A (en) * 2004-04-26 2005-01-26 昌邑同大海岛新材料有限公司 Process for making high simulation ultra-fine fabric leather based cloth
CN102389174A (en) * 2011-07-25 2012-03-28 王忠杰 Production process of double-point non-woven fusible interlining
CN103485192A (en) * 2013-09-24 2014-01-01 安徽安利合成革股份有限公司 Preparation method for seamless bonding polyurethane synthetic leather
CN106702742A (en) * 2016-12-05 2017-05-24 长兴科特邦服装材料有限公司 Production technology of lining fabric
CN109228550A (en) * 2018-08-10 2019-01-18 晟合新材料科技（嘉善）有限公司 A kind of composite material and preparation method thereof and automobile inner decoration facing based on it

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN1445390A (en) * 2003-05-06 2003-10-01 东华大学 Method and equipment for making elastic nonwovens from polyurethane by melting and jetting material to form mesh
CN1570267A (en) * 2004-04-26 2005-01-26 昌邑同大海岛新材料有限公司 Process for making high simulation ultra-fine fabric leather based cloth
CN102389174A (en) * 2011-07-25 2012-03-28 王忠杰 Production process of double-point non-woven fusible interlining
CN103485192A (en) * 2013-09-24 2014-01-01 安徽安利合成革股份有限公司 Preparation method for seamless bonding polyurethane synthetic leather
CN106702742A (en) * 2016-12-05 2017-05-24 长兴科特邦服装材料有限公司 Production technology of lining fabric
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