TW201326500A - Wet-type coating method for woven fabrics - Google Patents

Abstract

A wet-type coating method for woven fabrics is disclosed. It comprises the following several steps: (a). coating (b). water-rinsing (c). heating (d). coating again (e). water-rinsing (f). baking, etc. Firstly, coat one layer of PU adhesive on the woven fabric is coated with a layer of PU adhesive. The water-rinsing step basically comprises two flow paths such as placing-in water tank and pressing-sucking. The foregoing goal is mainly to water-rinse and replace dimethyl formamide (DMF) substance within the PU adhesive on the woven fabric passing through the water tank. The heating step is to heat the woven fabric to half-dried state by utilizing a heating machine, to proceed the re-coating and gumming operations on the woven fabric. Finally, the woven fabric is heated to the full-dried state through a baking oven, thereby achieving the purpose of saving energy consumption, reducing cloth color variation, and increasing the working efficiency.

Description

Wet coating method for plain weave

The present invention relates to a coating method, and more particularly to a wet coating method for a woven fabric which can save energy consumption and improve work efficiency.

Generally, the moisture permeable waterproof cloth structure is coated with a layer of moisture-permeable waterproof rubber layer on a plain woven fabric, and the moisture-permeable waterproof rubber layer prevents rainwater from intruding, and the hot and humid air generated by the body movement can be discharged. It is usually suitable for casual or sportswear for outdoor activities.

Referring to Figure 1, the general process of making a moisture-permeable tarpaulin is mainly to let the plain woven fabric pass (a). coating → (b). lower sink → (c). pressure suction → (d). drying → (e ) Coiling to another machine and then coating → (f). Lower sink (or no water) → (g). Pressure suction (no pressure, no pressure) → (h). Drying and other steps, coating The cloth step is to apply a layer of PU glue on a plain woven cloth, and the step of sinking the water is to let the flat woven cloth immerse in the water tank. The first water tank is to replace the dimethylformamide (DMF) substance in the glue with water and clean it. The pressing step is to roll the flat woven fabric by using a roller to press out the excess moisture in the flat woven fabric. The second sink is to clean the DMF with water and clean it, and also through the pressing step, the drying step is The flat woven fabric is placed in an oven for high-temperature baking, so that the flat woven fabric and the PU adhesive are completely dried, and then the coating and sizing operation can be performed. After repeated coating and drying operations, the woven fabric is woven. A moisture-permeable waterproof rubber layer can be formed on the cloth.

The above steps are a wet coating method of a plain woven fabric. The conventional coating method requires the flat woven fabric to be dried by an oven in each sizing coating, and the number of times of using the oven is quite frequent. Since the high-temperature heating element is used for heating in the oven, the heat element is operated to a high temperature state, the heat energy used is quite amazing, the energy cost is high, and the time required for the oven to heat the flat cloth to the dry state is equivalent. For a long time, the entire production process needs to go through multiple drying operations, resulting in a long and tedious time for the production of a single piece of finished product, and the work efficiency is not high. In addition, the flat woven fabric is dyed to an appropriate color according to the product requirements, but after a plurality of high-temperature baking, the color of the fabric changes, and the touch is not good, resulting in poor quality of the product.

Accordingly, it is an object of the present invention to provide a wet coating method for a plain woven fabric which can save energy consumption and improve work efficiency.

Accordingly, the present invention provides a wet coating method for a plain woven fabric comprising (a) coating → (b) washing with water (c) heating (d) recoating (e). Washing → (f). Drying and other steps, among which:

(a) coating, first preparing a plain woven fabric, the surface of the flat woven fabric is coated with a layer of polyurethane (PU) glue;

(b) Washing, basically consisting of a lower tank and a two-stage process of pressing, the lower tank is to let the plain weave cloth be immersed in a water tank for washing, and the dimethylformamide (DMF) substance in the glue is replaced by water, and the pressure is Allowing the water-washed flat woven fabric to be pressed by two rollers to pressurize the water;

(c) heating, and then passing the flat woven fabric through a heating machine, the heating machine heats the plain woven fabric to a semi-dry state, so that the sizing surface of the plain woven fabric reaches a level capable of recoating the sizing;

(d) recoating, applying a layer of polyurethane (PU) glue to the sizing surface of the plain woven fabric;

(e) Washing, basically consisting of a lower tank and a two-stage process of pressing, the lower tank is such that the plain weave is immersed in a water tank for washing, and the dimethylformamide (DMF) substance in the glue is replaced by water, and the pressure is Allowing the water-washed flat woven fabric to be pressed by two rollers to pressurize the water;

(f). Drying, finally let the plain woven fabric enter an oven, and the oven heats the flat woven fabric at a high temperature until it is completely dry.

The effect of the invention is that the flat woven fabric is coated and then subjected to a water washing operation, and then the flat woven fabric is heated to a semi-dry state by a heating machine, so that the flat woven fabric can be subjected to recoating and sizing, and coating After the gluing, the water washing operation is carried out, and finally the flat woven fabric is baked at a high temperature to the all-dry state by the oven, thereby achieving the advantages of effectively saving energy and improving work efficiency.

The invention provides another wet coating method for plain woven fabric, which comprises (a) coating→(b).washing→(c).heating→(d)recoating→(e) drying Wait a few steps, where:

(a) coating, first preparing a plain woven fabric, the surface of the flat woven fabric is coated with a layer of polyurethane (PU) glue;

(b). Washing, basically consists of a sink and a two-stage process. The lower tank is made by immersing the plain woven fabric in a water tank for water washing, replacing the dimethylformamide (DMF) substance in the glue with water, and sucking it. The water-washed flat woven fabric is pressed by two rollers to press out the water;

(c) heating, and then passing the flat woven fabric through a heating machine, the heating machine heats the plain woven fabric to a semi-dry state, so that the sizing surface of the plain woven fabric reaches a level capable of recoating the sizing;

(d) recoating, applying a layer of polyurethane (PU) glue to the sizing surface of the plain woven fabric;

(e). Drying, finally let the plain woven fabric enter an oven, and the oven heats the flat woven fabric at a high temperature until it is completely dry.

The effect of the invention is that the flat woven fabric is coated and then subjected to a water washing operation, and then the flat woven fabric is heated to a semi-dry state by a heating machine, so that the flat woven fabric can be recoated and glued, and finally borrowed. The flat woven fabric is baked at a high temperature to an all-dry state by an oven, thereby achieving the advantages of effectively saving energy and shortening the production process time.

The present invention further provides a wet coating method for a flat woven fabric comprising (a) coating → (b) heating → (c) recoating → (d) washing with water (e) drying. Wait a few steps, where:

(a) coating, first preparing a plain woven fabric, the surface of the flat woven fabric is coated with a layer of polyurethane (PU) glue;

(b) heating, and then let the flat woven fabric pass a heating machine, the heating machine heats the plain woven fabric to a semi-dry state, so that the sizing surface of the plain woven fabric reaches a level capable of recoating the sizing;

(c) recoating, applying a layer of polyurethane (PU) glue to the sizing surface of the plain woven fabric;

(d). Washing, basically consists of a sink and a two-stage process. The lower tank is made by immersing the plain weave in a water tank for water washing, replacing the dimethylformamide (DMF) substance in the glue with water, and sucking it. The water-washed flat woven fabric is pressed by two rollers to press out the water;

(e). Drying, finally let the plain woven fabric enter an oven, and the oven heats the flat woven fabric at a high temperature until it is completely dry.

The effect of the invention is that after the flat woven fabric is coated and glued, the flat woven fabric is heated to a semi-dry state by a heating machine, so that the flat woven fabric can be re-coated and glued, and then applied after the coating is applied. In the water washing operation, the flat woven fabric is baked at a high temperature to an all-dry state by an oven, thereby achieving the advantages of effectively saving energy and shortening the production process time.

The above and other technical features, features, and advantages of the present invention will be apparent from the following detailed description of the preferred embodiments.

Referring to Figure 2, the wet coating method of the plain woven fabric of the present invention comprises, in the first preferred embodiment, (a) coating → (b) washing with water (c) heating (d) recoating. Cloth→(e).washing→(f).drying and other steps, among which:

(a) Coating, first preparing a plain woven fabric 1, and applying a layer of polyurethane (PU) glue 2 to the surface of the woven fabric 1, as shown in FIG.

(b). Washing, basically consists of a lower sink and a suction process. In the present embodiment, the front washing operation is to let the plain weave 1 pass (b1) the first sink down → (b2) the first press. → (b3) The second step of the second sink → (b4) the second press and so on. Referring to Fig. 4, (b1) the first sump is to let the plain woven fabric 1 be immersed in the first water tank 100 for water washing, and to replace the dimethylformamide (DMF) substance in the glue with water, (b3) The secondary sump is such that the plain woven fabric 1 is immersed in the second water tank 200, and the dimethylformamide (DMF) substance in the glue is washed with water to make the plain woven fabric 1 cleaner. Referring to Fig. 5, in the pressing operation of (b2) and (b4), the water-washed plain woven fabric 1 is passed through the upper and lower rollers 300, and the water contained in the plain woven fabric 1 is pressed by the two rollers 300. Press out.

(c) Heating, referring to Fig. 6, the flat woven fabric 1 is then passed through a heating machine 400, and the heating machine 400 can heat the sizing surface of the plain woven fabric 1, so that the plain woven fabric 1 is in a semi-dry state. In this embodiment, the heating machine 400 has a plurality of ironing wheels 410 heated to a high temperature state, and a flat woven fabric 1 is wound between the ironing wheels 410 so that the surface of the plain woven fabric 1 can be contacted at a large area in the flattening. On the circumferential surface of the wheel 410, the ironing wheel 410 heats and dries the plain woven fabric 1, and the temperature of the ironing cloth 410 of the embodiment for heating the plain woven fabric 1 is about 100 to 120 ° C (the thickness of the cloth is thin) The time required for the flat woven fabric 1 to heat the machine 400 is about 10 seconds to 20 seconds (depending on the thickness of the cloth), the speed of passing through is relatively fast, and the degree of heating only needs to be carried out again on the sizing surface of the plain woven fabric 1. Apply the gluing operation. In addition, in the heating step of the present invention, in addition to the direct contact of the plain woven fabric 1 with the ironing wheel 410 as the heating means, the heating machine 400 can also achieve the flat woven fabric 1 by blowing or sucking hot air. The same heating effect.

(d) recoating, and then applying a layer of polyurethane (PU) glue 3 to the sizing surface of the plain woven fabric 1, as shown in Fig. 7, the woven fabric 1 is recoated. The number of times depends on the thickness of the moisture-permeable waterproof rubber layer. In the present embodiment, the flat woven fabric 1 is applied twice before and after, and of course, the manufacturer can perform more times on the plain woven fabric 1 depending on the product requirements. Coating operation.

(e). Washing, after the water washing operation, the flat woven fabric is subjected to a single sink and a suction operation. Referring to Fig. 4, the lower sump is immersed in the third water tank 500 for washing, and replaced with water. The dimethylformamide (DMF) substance in the gel, referring to Fig. 5, is followed by rolling the water-washed flat woven fabric 1 by the upper and lower rollers 300 to press out the moisture contained in the plain woven fabric 1.

(f). Drying, referring to Fig. 8, when the flat woven fabric 1 is coated with the last PU glue 3, and after the water washing operation, the flat woven fabric 1 can be put into an oven 600 for drying operation, and the oven 600 The entire flat woven fabric 1 is baked at a high temperature. In the present embodiment, the oven 600 heats the temperature to 150 to 155 ° C for the flat woven fabric 1 in a progressive heating manner, and the heating time is tens of seconds to several minutes. (depending on the thickness of the cloth), until the plain woven fabric 1 is completely dried, the moisture permeable waterproof rubber layer can be formed on the plain woven fabric 1, so that the final product of the moisture permeable waterproof cloth is completed.

The present invention also has variations on various embodiments. Referring to Figure 9, the second preferred embodiment of the present invention comprises (a) coating → (b) washing with water (c) heating (d) again. The steps of the coating → (e), water washing → (f) drying, and the like, the production flow of the embodiment is substantially the same as that of the first embodiment, and unlike the first embodiment, in (b) In the water washing step, the flat woven fabric only performs the lower water tank and the suction operation, and in the (e) water washing step, the flat woven fabric passes through (e1) the first sump → (e2) the first squeezing → (e3 The second process of lowering the water tank → (e4) second pressure suction, etc., the processing of the water washing operation in the front and the back of this embodiment is just opposite to that of the first embodiment, and the product of the moisture permeable waterproof cloth can also be made. .

Referring to Figure 10, in a third preferred embodiment, the present invention comprises (a) coating → (b) washing (c) heating (d) recoating → (e) drying, etc. In several steps, unlike the first embodiment, between the two steps of (d) recoating and (e) drying, the step of washing is omitted, and the plain woven fabric is applied after the PU glue is applied. Drying, so the time of the entire production process of this embodiment can be further shortened.

Referring to Figure 11, the fourth preferred embodiment of the present invention comprises (a) coating → (b) heating → (c) recoating → (d) washing (e) drying, etc. In several steps, unlike the first embodiment, between the two steps of (a) coating and (b) heating, the step of washing is omitted, until the flat woven fabric is coated with the PU glue for the last time. The water washing operation is performed, so that the multiple processes are omitted in the middle of the embodiment, and the time of the entire production process can be shortened.

The above is an overview of the manufacturing process of the wet coating method of the plain woven fabric of the present invention; and then, the effect that the present invention can achieve is stated as follows:

The invention is mainly for solving the problem that the conventional flat woven fabric coating method consumes energy and has low work efficiency. The technical means used in the present invention is to improve the drying operation in the process, and the present invention adopts a heating machine 400 in the middle of the process. The cloth 1 is heated, and the degree of heating is as long as the plain woven fabric 1 is in a semi-dry state, and the flat woven fabric 1 can be recoated to perform the sizing operation. The temperature of the ironing wheel 410 of the heating machine 400 of the present invention is about 110 to 120. Around °C, it does not need to be heated to a high temperature of 150 ° C ~ 155 ° C in the general oven, so the energy consumption is much less than the average oven, which can effectively achieve the effect of saving energy costs. In addition, the present invention does not require the heating time of the plain woven fabric 1 in the heating machine 400 to be too long, and after passing through the heating machine 400 in just a few tens of seconds, the next step can be carried out, which is equivalent to the cost of the general oven. The entire drying process is accelerated in minutes, and the work efficiency is greatly improved. Finally, the present invention minimizes the heating process of the plain woven fabric 1 during the entire coating process, thereby reducing variations in the color of the fabric, and allowing the product of the present invention to have an excellent touch texture and can be made. A product of excellent quality.

However, the above is only the preferred embodiment of the present invention, and the scope of the present invention is not limited thereto, that is, the simple equivalent change and modification according to the scope of the present invention and the description of the invention. All remain within the scope of the invention patent.

1. . . Flat weave

2. . . Glue

3. . . Glue

100. . . First sink

200. . . Second sink

300. . . Two rollers

400. . . Heating machine

410. . . Ironing wheel

500. . . Third sink

600. . . Oven

Figure 1 is a manufacturing flow chart of a conventional plain woven fabric;

Figure 2 is a manufacturing flow chart of a first preferred embodiment of the wet coating method of the plain woven fabric of the present invention;

Figure 3 is a schematic view of the above preferred embodiment, illustrating a case where a layer of PU glue is applied to the surface of a plain woven fabric in the coating step;

Figure 4 is a schematic view of the above preferred embodiment, illustrating the situation in which the flat woven fabric enters a water tank for water washing in the water washing step;

Figure 5 is a schematic view of the above preferred embodiment, illustrating a situation in which the flat woven fabric receives two roller rolls for pressure suction in the water washing step;

Figure 6 is a schematic view of the above preferred embodiment, illustrating the case where the flat woven fabric enters a heating machine during the heating step and is heated by the ironing wheel;

Figure 7 is a schematic view of the above preferred embodiment, illustrating a case where a layer of PU glue is further coated on the plain woven fabric in the recoating step;

Figure 8 is a schematic view of the above preferred embodiment, illustrating the case where the flat woven fabric enters an oven for drying in the drying step;

Figure 9 is a manufacturing flow chart of a second preferred embodiment of the present invention;

Figure 10 is a flow chart showing the manufacture of a third preferred embodiment of the present invention; and

Figure 11 is a flow chart showing the manufacture of a fourth preferred embodiment of the present invention.

Claims (8)

A wet-laid method for flat woven fabric, the steps of which are: (a) coating, first preparing a plain woven fabric, and coating a surface of the woven fabric with a layer of polyurethane (PU) glue; b) Washing, basically consists of two steps of lowering the sink and pressing. The lower sink is to let the plain weave cloth immerse in a water tank for washing, and replace the dimethylformamide (DMF) substance in the glue with water. The water-washed flat woven fabric is pressed by two roller rolls to pressurize the water; (c) heating, and then the flat woven fabric is passed through a heating machine, and the heating machine heats the flat woven fabric to a semi-dry state to make the plain woven fabric The sizing surface is capable of being recoated with a sizing; (d) recoating, applying a layer of polyurethane (PU) glue to the sizing surface of the woven fabric; (e) washing with water, It basically consists of a lower tank and a two-stage suction process. The lower tank is made by immersing the plain woven fabric in a water tank for washing, and replacing the dimethylformamide (DMF) substance in the glue with water. The pressure is after washing. The flat woven fabric is pressed by two roller rolls to press out the water; (f) drying, and finally the flat woven fabric is put into an oven, and the oven is subjected to high temperature heat drying until the flat woven fabric is heated. Until the dry state. The wet-laid method for plain woven fabric according to claim 1, wherein in the (b) water washing step, the plain woven fabric passes through the first sink, the first press, and the second In the sink and the second pressure suction, in the (e) water washing step, the flat woven fabric is only subjected to the lower water tank and the suction. The wet-laid method for flat woven fabric according to claim 1, wherein in the (b) water washing step, the flat woven fabric is only subjected to the lower water tank and the suction, and in the (e) water washing step, The plain weave is passed through the first sink, the first press, the second sink, and the second press. The wet-laid method for flat woven fabric according to claim 1, wherein in the heating step (c), the heating machine has a plurality of ironing wheels heated to a high temperature state, so that the woven fabric is affixed. Cover the surface of the hot flat wheel and let the ironing wheel heat the flat weave. The method for wet coating of a plain woven fabric according to claim 1, wherein in the heating step (c), the heating device heats the flat woven fabric at a temperature of 110 to 120 ° C (the thickness of the cloth is thin) The time required to heat the machine by the flat weave is about 10 seconds to 20 seconds (depending on the thickness of the cloth). The wet-laid method of plain woven fabric according to claim 1, wherein in the (f) drying step, the oven heats the flat woven fabric at a temperature of 150 to 155 °C. A wet-laid method for flat woven fabric, the steps of which are: (a) coating, first preparing a plain woven fabric, and coating a surface of the woven fabric with a layer of polyurethane (PU) glue; b). Washing, basically consists of a lower tank and a two-stage suction process. The lower tank is made by immersing the plain woven fabric in a water tank for water washing, and replacing the dimethylformamide (DMF) substance in the glue with water. The pressure is The water-washed flat woven fabric is pressed by two roller rolls to press out the water; (c) heating, and then the flat woven fabric is passed through a heating machine, and the heating machine heats the flat woven fabric to a semi-dry state to make the plain weave. The sizing surface of the cloth reaches the extent that it can be recoated; (d) recoating, and applying a layer of polyurethane (PU) glue to the sizing surface of the woven fabric; (e). Drying, finally let the plain woven fabric enter an oven, and the oven heats the flat woven fabric at a high temperature until it is completely dry. A wet-laid method for flat woven fabric, the steps of which are: (a) coating, first preparing a plain woven fabric, and coating a surface of the woven fabric with a layer of polyurethane (PU) glue; b) heating, then let the flat woven fabric pass a heating machine, the heating machine heats the plain woven fabric to a semi-dry state, so that the sizing surface of the plain woven fabric can reach the extent that the sizing can be re-coated; (c) recoating Cloth, a layer of polyurethane (PU) glue is applied to the sizing surface of the plain woven fabric; (d). Washing, basically consists of a lower sink and a suction process, and the lower sink is a flat weave. Immerse in a water tank for water washing, and replace the dimethylformamide (DMF) substance in the glue with water. The pressure is to let the water-washed flat woven fabric pass through two roller rolls to press out the water; (e). Drying, finally let the plain woven fabric enter an oven, and the oven heats the flat woven fabric at a high temperature until it is completely dry.