TWI626157B - Knitting composite structure and method for manufacturing the same - Google Patents

Abstract

The invention provides a knitted composite structure and a method of manufacturing the same. The manufacturing method comprises: providing a knitted base fabric; printing the first paste on the knitted base fabric by gravure printing, wherein the first paste comprises a polyurethane, and a part of the first paste is along the knitted base fabric The direction of the thickness is soaked to the inside of the knitted fabric to a depth of less than 1/5 to 1/3 of the thickness of the knitted base fabric; the drying is performed by heating to form the protective layer of the first paste; and the waterproof laminated structure is formed On the protective layer. The method of the present invention prints the first paste by gravure printing and controls the depth of the first paste to infiltrate into the interior of the knitted fabric, thereby avoiding the change of the base fabric width caused by the prior art coating of the paste by coating. The phenomenon of tactile and elastic deterioration.

Description

Knitted composite structure and manufacturing method thereof

The present invention relates to a composite structure and a method of manufacturing the same, and more particularly to a knitted composite structure and a method of manufacturing the same.

In general, knitted fabrics are widely used as materials for general clothing materials because they are softer in texture, easier to breathe, and more permeable and more elastic than flat woven fabrics. With the improvement of the quality of life, the functional requirements for clothing materials are relatively high. For example, how to impart excellent waterproof properties to clothing materials made of knitted fabrics has become one of the urgent goals of the industry. The prior art method for manufacturing a waterproof knit fabric involves applying a paste having a waterproof property to the surface of the knit fabric by coating, for example, a paste mainly composed of polyurethane (PU), and heating The paste is dried to solidify it to form a water repellent layer on the surface of the knit fabric. Therefore, when wearing or using such a knitted fabric article having waterproof properties, in addition to maintaining the wearing comfort of the fabric, it also provides a good weatherproof effect.

However, in the process of applying a paste having water-repellent properties by coating, it is necessary to fix the periphery of the knitted fabric in a cloth-edge manner to avoid the horizontal force generated when the paint is applied by a doctor blade. The cloth is displaced. By means of the edges of the fabric, the knit fabric is deformed (for example, the width of the fabric is narrowed) and thus affects the aesthetics and practicability of the product. Further, even if the position of the knitted fabric has been fixed by the side of the cloth, since the knitted fabric itself has elasticity, it is deformed by the horizontal force of the coating machine such as a doctor blade during the application of the paste. Such a In addition, it is possible to cause uneven distribution of the coating during the coating process, and the shape of the knitted fabric may be permanently changed after the paste is cured by heating to form a waterproof layer.

In addition, the use of a coating machine such as a doctor blade to apply a paste to a knitted fabric cannot precisely control the thickness and uniformity of the paste applied to the knitted fabric. Since the structure of the knitted fabric itself has pores, part of the paste is wetted and penetrates into the inside of the knitted fabric when the paste is applied. Since the polyurethane paste is tough after curing, if the paste is excessively wetted into the interior of the knitted fabric because the coating thickness of the paste cannot be precisely controlled, the softness and elasticity of the knitted fabric product are greatly reduced. , which in turn affects the touch and comfort of the wear.

Therefore, there is still a need to provide a solution that achieves the waterproof effect while maintaining the softness and appearance of the knitted fabric.

In order to solve the above technical problem, according to one aspect of the present invention, a method for manufacturing a knitted composite structure includes: providing a knitted base fabric having a thickness; and using a gravure printing method to apply a first paste Printing on the knitted base fabric, wherein the first paste comprises a polyurethane, a portion of the first paste is infiltrated into the interior of the knitted fabric in the direction of the thickness a depth less than 1/5 to 1/3 of the thickness of the knitted base fabric; drying by heating to form the first paste to form a protective layer; and forming a waterproof laminated structure on the protective layer on.

Another embodiment of the present invention provides a knitted composite structure comprising a knitted base fabric, a protective layer, and a waterproof laminate structure. The knitted base fabric has a thickness, the protective layer comprises a wetting layer and a non-wetting layer, wherein the wetting layer is located inside the knitted base fabric, and the non-wetting layer is located outside the knitted base fabric And the thickness of the wetting layer is less than 1/5 to 1/3 of the thickness of the knitted base fabric. The waterproof laminate structure is disposed on the non-wetting layer of the protective layer.

The technical means of the present invention is to discard the prior art using a doctor blade to coat the paste. In a manner, the paste is printed on the knitted base fabric by gravure printing, so that the paste is wetted to the inside of the knitted base fabric to a depth less than 1/5 to 1/3 of the thickness of the knitted base fabric, and then formed by heating and drying. The protective layer. As a result, according to the above technical means, the present invention can prevent the paste from excessively infiltrating into the inside of the knitted base fabric and greatly reduce the softness of the knitted base fabric.

Furthermore, since the technical means for transferring the paste onto the knitted base fabric by means of gravure printing does not substantially apply a horizontal force to the knitted base fabric, it is not necessary to perform the cloth edge in the manufacturing method of the present invention. The procedure does not cause the deformation of the knitted fabric product due to the elasticity of the knitted base fabric itself.

In addition, the waterproof laminate structure in the embodiment of the present invention can impart various functions to the knitted composite structure, such as windproof, waterproof, antibacterial, sunscreen, warmth, etc., so that the manufactured product is more functional and perfect.

For a better understanding of the features and technical aspects of the present invention, reference should be made to the accompanying drawings.

S‧‧‧Knitted composite structure

1‧‧‧Knitted fabric

2‧‧‧Protective layer

21‧‧‧Infiltration layer

22‧‧‧Non-wetting layer

3‧‧‧Waterproof laminated structure

31‧‧‧First waterproof layer

32‧‧‧Second waterproof layer

33‧‧‧ third waterproof layer

T‧‧‧thickness

D‧‧‧depth

1A is a cross-sectional view showing a step S100 of a method for manufacturing a knitted composite structure according to an embodiment of the present invention; FIG. 1B is a cross-sectional view showing a step S102 and a step S104 of a method for manufacturing a knitted composite structure according to an embodiment of the present invention; 1C is a schematic cross-sectional view of a step S106 of a method for manufacturing a knitted composite structure according to an embodiment of the present invention; FIG. 2 is a schematic cross-sectional view of a knitted composite structure according to an embodiment of the present invention; and FIG. 3 is a knitting provided by an embodiment of the present invention. A flowchart of a method of fabricating a composite structure; and FIG. 4 is a flow chart showing the steps of forming a waterproof laminate structure according to an embodiment of the present invention.

The following is a description of the embodiments of the present invention relating to the "knit composite structure and its manufacturing method" by specific specific examples, and those skilled in the art can understand the advantages and effects of the present invention from the contents disclosed in the present specification. The present invention can be implemented or applied in various other specific embodiments, and various modifications and changes can be made without departing from the spirit and scope of the invention. In addition, the drawings of the present invention are merely illustrative and are not intended to be described in terms of actual dimensions. The following embodiments will further explain the related technical content of the present invention, but the disclosure is not intended to limit the technical scope of the present invention.

First, please refer to FIGS. 1A to 1C and FIG. 3. 1A-1C are schematic cross-sectional views showing respective steps in a method of manufacturing a knitted composite structure according to an embodiment of the present invention. Meanwhile, please refer to FIG. 3, which is a flow chart of a method for manufacturing a knitted composite structure according to an embodiment of the present invention.

First, referring to Fig. 1A, a knitted base fabric having a thickness (S100) is provided. The knitted base fabric 1 may be a knitted base fabric made by Circular Knitting, Warp Knitting or Flat Knitting. In addition, the knitted base fabric 1 may involve different stitching methods such as a Plain Stich, a Purl Stich, a Tuck Stich, and/or a Miss Stich. The thickness t of the knitted base fabric 1 can be selected according to the product requirements. For example, the knitted base fabric 1 may have a thickness t of from 0.1 to 3.0 mm, however, the invention is not limited thereto.

Next, referring to FIG. 1B, a first paste is printed on the knitted base fabric by gravure printing, wherein the first paste comprises a polyurethane, the first paste. A portion is infiltrated in the direction of the thickness to a depth of the inside of the knitted fabric of less than 1/5 to 1/3 of the thickness of the knitted base fabric (S102). Specifically, the first paste may be a paste mainly composed of polyurethane (PU). The step of printing the first paste onto the knitted base fabric 1 by gravure printing may be accomplished by using a gravure printing machine, and may further comprise the steps of: filling the first paste in a printing groove of a mold. And the knitting base in the vertical direction The cloth 1 and the mold are combined to transfer the first paste onto the knitted base fabric 1. In other words, in the step S102 of the present invention, the first paste is directly transferred onto the uncoated knitted base fabric 1.

According to the above, in particular, after the first paste is filled in the groove of the printing die, the excess paste can be scraped off by the doctor blade to precisely control the first to be printed on the knitted base fabric 1. The amount of a paste. Next, the knitted base fabric 1 may be overlaid on a mold filled with the first paste and pressurized so that the first paste is transferred from the printing groove of the mold to the surface of the knitted base fabric 1. Alternatively, the mold filled with the first paste may be coated on the knitted base fabric 1 and pressurized to achieve the effect of transferring the first paste.

Since the structure of the knitted base fabric 1 itself has pores, after the first paste is printed on the surface of the knitted base fabric 1, it is infiltrated into the inside of the knitted base fabric 1 in the direction of the thickness t of the knitted base fabric 1. In the present invention, the depth d of the first paste infiltrated into the inside of the knitted fabric 1 is smaller than 1/5 to 1/3 of the thickness t of the knitted fabric 1. The depth d of the first paste infiltrated into the interior of the knitted fabric 1 can be precisely controlled by controlling the amount of the first paste filled in the groove of the printing die.

It is worth mentioning that, unlike the prior art, the paste is applied to the surface of the knitted base fabric 1 by means of a scraper or the like, and the first paste is printed by gravure printing, and the printing of the mold can be adjusted. The size and depth of the groove are used to adjust the amount of the first paste to be printed on the surface of the knitted base fabric 1. In this way, the depth d of the first paste infiltrated into the interior of the knitted fabric 1 can be precisely controlled, thereby preventing the first paste from excessively infiltrating into the interior of the knitted base fabric 1, thereby affecting the elasticity of the knitted base fabric 1 after curing. And softness.

Next, as also shown in FIG. 1B, it is dried by heating so that the first paste forms a protective layer (S104). Since the first paste is a polyurethane-based paste, after heating and drying, the molecular bonding in the first paste is changed, so that the first paste is solidified to have a dense structure. And a protective layer 2 with good weather resistance. The detailed technical means and related parameters of the heating and drying can be selected according to the composition and characteristics of the first paste, and other parameters or cost considerations in the process, in the present invention. There are no restrictions in it.

Referring also to FIG. 1B, since a portion of the first paste is infiltrated into the inside of the knitted fabric 1 in the direction of the thickness t in step S102, the protective layer 2 formed in step S104 is composed of the wetting layer 21 and the non-wetting layer. 22 is constructed in which the wetting layer 21 is located inside the knitted base fabric 1, and the non-wetting layer 22 is located on the outer surface of the knitted base fabric 1. In other words, assuming that the thickness t of the knitted fabric 1 is 3.0 mm, the thickness of the wetting layer 21 of the protective layer 2 (equal to the depth d) is between 0.6 mm and 1 mm.

According to the above, the protective layer 2 formed in the step S104 can avoid the paste which constitutes the waterproof layer or the functional layer in the subsequent processing procedure, for example, the step of further forming the waterproof layer or the functional layer on the knitted base fabric 1. It infiltrates and penetrates into the inside of the knitted base fabric 1. In other words, since the protective layer 2 has been cured by heating and drying, after the protective layer 2 is formed, the elasticity and flexibility of the knitted base fabric itself are not degraded by the influence of other pastes which are subsequently added.

Finally, referring to FIG. 1C, a waterproof laminate structure is formed on the protective layer (S106). 2 and FIG. 4, FIG. 2 is a schematic cross-sectional view showing the structure of a knitted composite structure according to an embodiment of the present invention, and FIG. 4 is a flow chart showing the steps of forming a waterproof laminated structure according to an embodiment of the present invention. Specifically, in the step of forming the waterproof laminated structure 3 on the protective layer 2, the method further comprises: printing a second paste on the protective layer by gravure printing (S1061); drying by heating, So that the second paste forms a first waterproof layer (S1062); a third paste is printed on the protective layer by gravure printing (S1063); and dried by heating to make the The third paste forms a second waterproof layer (S1064).

Forming the waterproof laminated structure can achieve the desired thickness of the knitted composite structure S, and at the same time impart the desired functionality (for example, windproof, waterproof, antibacterial, sunscreen, warmth, etc.) of the knitted composite structure S. For example, the second paste and the third paste each comprise a polyurethane. Preferably, the second paste and the third paste are each a polyurethane-based paste. In other words, after the second paste and the third paste are dried by heating, they can exert the functions of windproof and waterproof. In addition, in the embodiment of the present invention, the first paste The material, the second paste and the third paste may each comprise a functional auxiliary. The functional adjuvant may be selected from the group consisting of a moisture absorbent, a pigment, an antioxidant, a UV absorber, a filler, a flame retardant, an antibacterial agent, a warming additive, a cooling additive, and a luminous powder. Further, the moisture absorbent may be a cerium-containing compound, the antibacterial agent may be nano silver, the warming additive may be infrared ore powder, and the cooling sensation additive may be cool sensation fiber, nano bismuth and ore powder (for example, jade powder).

The details of printing the second paste by gravure printing and printing the third paste by gravure printing are as described above for the printing of the first paste and will not be described in detail herein. Further, the step of heating and drying the second paste and the third paste is also as described previously for the purpose of heating and drying the first paste. It is worth mentioning that the second paste and the third paste can be printed by the same mold, so that the first waterproof layer 31 and the second waterproof layer respectively formed by the second paste and the third paste are respectively 32 will have the same thickness. By using the same mold to print different waterproof layers in stages, the complexity of the process can be effectively reduced and the production cost can be saved.

After the step of drying by heating to form the third paste into the second waterproof layer, the method further includes: forming a plurality of third waterproof layers on the second waterproof layer (S1065), and first The waterproof layer 31, the second waterproof layer 32, and the multilayered third waterproof layer 33 constitute a waterproof laminated structure 3. In other words, the number of waterproof layers in the waterproof laminate structure 3 formed after the protective layer 2 is formed in step S104 is not limited thereto and can be adjusted according to product requirements. For example, multiple layers of waterproofing layers can be formed sequentially to achieve the thickness requirements of the product. As shown in FIG. 3, the waterproof laminated structure 3 of the embodiment of the present invention is composed of four waterproof layers. In addition, it is also possible to add different functional additives in different waterproof layers, so that the knitted composite structure S thus produced has various functions at the same time. For example, nano silver may be added to the first waterproof layer 31, and far-infrared ore powder may be added to the second waterproof layer 32, so that the knitted composite structure S thus produced has both waterproof, antibacterial, and heat-insulating effects.

Furthermore, since the paste is applied by using a doctor blade as compared with the prior art, the use of the gravure printing method to print the paste can more accurately control the amount of the paste used, by repeating In the step of printing and drying, the waterproof laminated layer 3 can be formed by using a plurality of thinner waterproof layers, so that the overall thickness of the waterproof laminated structure 3 is more precisely controlled. Further, the thickness distribution of the protective layer and the waterproof layer formed by the gravure printing method of the embodiment of the present invention is more uniform than in the prior art.

Further, an embodiment of the present invention further provides a knitted composite structure S produced by the above-described method of manufacturing a knitted composite structure. Referring to FIG. 3, the knitted composite structure S comprises a knitted base fabric 1, a protective layer 2, and a waterproof laminate structure 3. The manufacturing method of the knitted composite structure S and the composition and process parameters of the layers therein are as described above for the manufacturing method of the knitted composite structure, and the description thereof will not be repeated here.

[Effective effect of the embodiment]

In summary, the present invention provides a knitted composite structure S and a method of manufacturing the same according to the present invention, which can print a first paste on the knitted base fabric by gravure printing. Above, wherein the first paste comprises a polyurethane, a portion of the first paste is infiltrated in a direction of the thickness to a depth of the inside of the knitted fabric to be smaller than that of the knitted fabric The technical means of 1/5 to 1/3 of the thickness prevents excessive infiltration of the paste into the interior of the knitted fabric and greatly reduces the softness and elasticity of the knitted fabric.

Moreover, since the technical means for transferring the paste onto the knitted base fabric by means of gravure printing does not substantially apply a horizontal force to the knitted base fabric, it is not necessary to perform the cloth edge in the manufacturing method of the present invention. The procedure does not cause the deformation of the knitted fabric product due to the elasticity of the knitted base fabric itself.

In addition, the waterproof laminate structure in the embodiment of the present invention can impart various functions to the knitted composite structure, such as windproof, waterproof, antibacterial, sunscreen, warmth, etc., so that the manufactured product is more functional and perfect.

The above is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Therefore, equivalent technical changes made by using the present specification and the contents of the drawings are included in the protection scope of the present invention. .

Claims (8)

A method for manufacturing a knitted composite structure, comprising: providing a knitted base fabric having a thickness; and printing a first paste on the uncoated knitted base fabric by gravure printing Wherein the first paste comprises a polyurethane, a portion of the first paste is infiltrated in a direction of the thickness to a depth of the inside of the knitted fabric of less than the knitted fabric 1/5 to 1/3 of the thickness; drying by heating to form the first paste to form a protective layer; and forming a waterproof laminate structure on the protective layer by gravure printing; wherein the intaglio is used Printing the method of printing the first paste on the knitted base fabric, further comprising: filling the first paste in a printing groove of a mold; and placing the vertical paste in a vertical direction The knitted base fabric and the mold are combined to transfer the first paste onto the knitted base fabric. The method for manufacturing a knitted composite structure according to claim 1, wherein the step of forming the waterproof laminate structure on the protective layer further comprises: printing a second paste by gravure printing On the protective layer; drying by heating to form the first paste to form a first waterproof layer; printing a third paste on the protective layer by gravure printing; and drying by heating So that the third paste forms a second waterproof layer. The method of manufacturing a knitted composite structure according to claim 2, wherein after the step of drying by heating to form the third paste into the second waterproof layer, further comprising: forming a plurality of third waterproof layers On the second waterproof layer, the first waterproof layer, the second waterproof layer and the plurality of third waterproof layers constitute the waterproof laminate structure. The method of manufacturing a knitted composite structure according to claim 2, wherein the second paste and the third paste each comprise a polyurethane. The method of manufacturing a knitted composite structure according to claim 4, wherein the first paste, the second paste, and the third paste each comprise a functional auxiliary. The method for producing a knitted composite structure according to claim 5, wherein the functional auxiliary agent is selected from the group consisting of a moisture absorbent, a pigment, an antioxidant, an ultraviolet absorber, a filler, a flame retardant, an antibacterial agent, and a warming agent. A group of additives, cooling additives, and luminous powder. The method of manufacturing a knitted composite structure according to claim 1, wherein the protective layer comprises a wetting layer and a non-wetting layer, wherein the wetting layer is located inside the knitted base fabric, and the non-wetting layer is located The outer portion of the knitted base fabric, and the thickness of the wetting layer is less than 1/5 to 1/3 of the thickness of the knitted base fabric. The method of manufacturing a knitted composite structure according to claim 2, wherein the first waterproof layer and the second waterproof layer both have the same thickness.