TW201325900A - Waterproof sealing tape - Google Patents

Abstract

Disclosed herein is a waterproof sealing tape, which includes a waterproof polyester film and a hot melt adhesive layer. The hot melt adhesive layer is disposed on and in contact with the waterproof polyester film. The hot melt adhesive layer includes about 50 to about 80 weight parts of copolyester, about 5 to about 30 weight parts of first polyester and about 10 to about 40 weight parts of second polyester. The viscosity of the first polyester is greater that of the copolyester, and the viscosity of the second polyester is greater than that of the first polyester.

Description

Waterproof sticker

The present invention relates to a waterproof sticker, and more particularly to a polyester waterproof sticker.

In recent years, moisture-permeable and waterproof garments have become more and more popular among consumers. Some manufacturers have developed lightweight and breathable waterproof garments that control the weight of the entire garment to around 100 grams. In general, a breathable waterproof garment is made by sewing a plurality of sheets of breathable waterproof cloth. Although the breathable waterproof cloth has the effect of being breathable and waterproof, it is still necessary to use a waterproof strip to adhere the seam to prevent liquid water from penetrating into the waterproof garment through the seam. In the case of lightweight breathable waterproof garments, the thickness of the waterproof strip in the prior art is too large, and when the waterproof strip is adhered to the lightweight moisture-permeable waterproof textile, the surface undulation break is large, and is not Consumers love it. Therefore, in order to develop a lightweight and breathable waterproof garment, it is necessary to develop a waterproof sticker with a thinner thickness.

The invention discloses a waterproof sticker which can have a small thickness, a good adhesive strength, and can be applied to a lightweight breathable waterproof textile. Moreover, the waterproof sticker is entirely made of a polyester material, so that the recycling is convenient. The waterproof sticker comprises a polyester waterproofing membrane and a polyester hot melt adhesive. The polyester hot melt adhesive is in contact with and located on the polyester waterproofing film. The polyester hot melt adhesive comprises from about 50 to about 80 parts by weight of the copolyester, from about 5 to about 30 parts by weight of the first polyester, and from about 10 to about 40. Second polyester by weight. The viscosity of the first polyester is greater than the viscosity of the copolyester, and the viscosity of the second polyester is greater than the viscosity of the first polyester.

According to an embodiment of the invention, the copolyester has a viscosity of from about 100 to about 200 Pa x s, the first polyester has a viscosity of from about 300 to about 700 Pa x s, and the second polyester has a viscosity of from about 1500 to about 2500. Pa × s.

According to an embodiment of the invention, the melt volume index of the copolyester is greater than the melt volume index of the first polyester, and the melt volume index of the first polyester is greater than the melt volume index of the second polyester.

According to an embodiment of the present invention, the copolyester has a melt volume index of from about 40 to about 70 g/10 min, and the first polyester has a melt volume of from about 15 to about 25 g/10 min, and the second polyester melt volume The index is from about 1 to about 5 g/10 min.

According to an embodiment of the invention, the polyester hot melt adhesive comprises from about 55 to about 65 parts by weight of the copolyester, from about 5 to about 15 parts by weight of the first polyester, and from about 25 to about 35 parts by weight of the second polyester. .

According to an embodiment of the invention, the melting point of the copolyester is lower than the melting point of the first polyester, and the melting point of the first polyester is lower than the melting point of the second polyester.

According to an embodiment of the invention, the copolyester has a melting point of from about 110 ° C to about 125 ° C, the first polyester has a melting point of from about 120 ° C to about 130 ° C, and the second polyester has a melting point of from about 125 ° C to about 135 ° C. .

According to an embodiment of the invention, the copolyester is from about 2 to about 10 parts by weight of glutaric acid, from about 60 to about 70 parts by weight of terephthalic acid, and from about 20 to about 38 parts by weight, 4 to 2 parts. The alcohol is produced by copolymerization.

According to an embodiment of the present invention, the polyester waterproofing membrane comprises a polyester-polyether copolymer, and one of the polyester waterproofing membranes has a thickness of about 10-20 μm, and one of the polyester hot melt adhesives has a thickness of about 20 -25 μm.

According to an embodiment of the present invention, the first polyester has a glass transition temperature, a melting point, a melt volume index, and a viscosity of about 10.8 ° C, about 126 ° C, about 19.4 g/10 min, and about 500 Pa × s, respectively. The glass transition temperature, melting point, melt volume index, and viscosity are about 25.8 ° C, about 130 ° C, about 2.1 g/10 min, and about 1974 Pa × s, respectively.

The description of the embodiments of the present invention is intended to be illustrative and not restrictive. The embodiments disclosed herein may be combined or substituted with each other in an advantageous manner, and other embodiments may be added to an embodiment without further description or description.

In the following description, numerous specific details are set forth However, embodiments of the invention may be practiced without these specific details. In other instances, well-known structures and devices are only schematically shown in the drawings in order to simplify the drawings.

FIG. 1 is a cross-sectional view showing a waterproof sticker 100 according to an embodiment of the present invention. The waterproof sticker 100 includes a polyester waterproof film 110 and a polyester hot melt adhesive 120. The polyester hot melt adhesive 120 is placed on the polyester waterproof film 110.

The polyester waterproof film 110 prevents liquid water from penetrating or penetrating. In an embodiment, the polyester waterproof film 110 may comprise a polyester-polyether copolymer, and the polyester waterproof film 110 has a thickness of about 10-20 μm.

The polyester hot melt adhesive 120 is placed on the polyester waterproof film 110 and is in contact with the polyester waterproof film 110. The polyester hot melt adhesive 120 melts when heated, and allows the waterproof adhesive strip 100 to be bonded to the seam of the fabric via heat bonding. The thickness of the polyester hot melt adhesive 120 can be, for example, about 20-25 μm.

Polyester hot melt adhesive 120 comprises three different polyester polymers and is made by physical blending. In particular, the polyester hot melt adhesive 120 comprises from about 50 to about 80 weight percent copolyester, from about 5 to about 30 weight percent of the first polyester, and from about 10 to about 40 weight percent of the second polyester. The copolyester, the first polyester, and the second polyester are physically blended to form a polyester hot melt adhesive 120. In other words, the copolyester is the main component in the polyester hot melt adhesive 120. In one example, the polyester hot melt adhesive 120 comprises from about 55 to about 65 weight percent of the copolyester, from about 5 to about 15 weight percent of the first polyester, and from about 25 to about 35 weight percent of the second polyester. .

As stated above, the viscosity of the first polyester is greater than the viscosity of the copolyester, and the viscosity of the second polyester is greater than the viscosity of the first polyester. In other words, in the composition of the polyester hot melt adhesive 120, the copolyester has the lowest viscosity and the second polyester has the highest viscosity. In this paper, "viscosity" is defined as a dynamic analysis rheometer using a two-plate clamp with a diameter of 25 mm at a temperature of 135 ° C and a shear rate of 10 (1/s). Value.

In one embodiment, the viscosity of the second polyester is from about 2 to about 8 times the viscosity of the first polyester, and the viscosity of the first polyester is from about 1.5 to about 7 times the viscosity of the copolyester. Specifically, the viscosity of the copolyester is from about 100 to about 200 Pa×s, the viscosity of the first polyester is from about 300 to about 700 Pa×s, and the viscosity of the second polyester is from about 1500 to about 2500 Pa×s. .

In another embodiment, the melt volume index (MVI) of the copolyester is greater than the melt volume index of the first polyester, and the melt volume index of the first polyester is greater than the melt volume index of the second polyester. Herein, the "melt volume index" is measured by the method of ASTM D 1238, and is measured at a temperature of 135 ° C and a load of 2.16 Kg. In this embodiment, the melt volume index of the copolyester is from about 1.5 times to about 5 times the melt volume of the first polyester, and the melt volume index of the first polyester is about the melt volume index of the second polyester. 3 times to about 25 times. More specifically, the copolyester has a melt volume index of from about 40 g/10 min to about 70 g/10 min, and the first polyester has a melt volume of from about 15 g/10 min to about 25 g/10 min, The melt volume index of the two polyesters is from about 1 g/10 min to about 5 g/10 min. In other words, the fluidity of the copolyester is the best, the fluidity of the first polyester is second, and the fluidity of the second polyester is the lowest.

In still another embodiment, the melting point of the copolyester is lower than the melting point of the first polyester, and the melting point of the first polyester is lower than the melting point of the second polyester. Herein, "melting point" is defined as a value measured by a thermal differential scanning analyzer (DSC) using nitrogen gas as a purge gas at a temperature rising rate of 5 ° C/min. Specifically, the copolyester has a melting point of from about 110 ° C to about 125 ° C, the first polyester has a melting point of from about 120 ° C to about 130 ° C, and the second polyester has a melting point of from about 125 ° C to about 135 ° C.

In one embodiment, the copolyester is from about 2 to about 10 parts by weight glutaric acid, from about 60 to about 70 parts by weight terephthalic acid, and from about 20 to about 38 parts by weight, 4, and 2 parts. The alcohol is produced by copolymerization. The first polyester is a polyester resin of model D 1539E supplied by EMS Griltex. The second polyester is a 6E polyester resin supplied by EMS Griltex. In this example, the glass transition temperature (Tg), melting point (Tm), melt volume index (MVI), and viscosity of the copolyester are about -35.6 ° C, about 118 ° C, about 54.6 g/10 min, and about 154.5 Pa, respectively. ×s. The glass transition temperature, melting point, melt volume index and viscosity of the first polyester are about 10.8 ° C, about 126 ° C, about 19.4 g / 10 min, and about 500 Pa × s, respectively, the glass transition temperature and melting point of the first polyester. The melt volume index and viscosity are about 25.8 ° C, about 130 ° C, about 2.1 g/10 min, and about 1974 Pa × s, respectively. The properties of the above copolyester, the first polyester and the second polyester are summarized in Table 1 below.

One feature of an embodiment of the invention is a full polyester. The polyester waterproof film 110 and the polyester hot melt adhesive 120 of the waterproof strip 100 are all polyester materials and do not contain other types of polymer materials. Polyester is the most mature polymer type in polymer recovery technology. Therefore, for the current polymer recovery technology, the waterproof strip 100 using all-polyester can be completely recycled and reused. The waterproof stickers in the prior art contain different kinds of polymer materials, which is very inconvenient for recycling. In addition, when the all-polyester waterproof strip 100 is applied to a moisture-permeable waterproof textile made of polyester, the material on the whole textile is a polyester material, so that it can be completely recovered at one time.

Another feature of an embodiment of the present invention is to provide an "adhesive bond" adhesive strength. The adhesion of the polyester hot melt adhesive 120 to the fabric substrate is a very important consideration. If the adhesive strength of the polyester hot melt adhesive 120 to the fabric is not large enough, when the fabric substrate or the garment is cleaned, the waterproof adhesive strip 100 may be peeled off from the fabric substrate or the garment, and the fabric substrate may be deprived of water resistance. Features. Please refer to Figure 2, which shows a schematic diagram of the test method of "perfect bonding". The fabric substrate 200 includes a water repellent layer 210 and a polyester substrate 220. The waterproof strip 100 is adhered to the waterproof layer 210 of the textile substrate 200 in a heat-bonding manner. Then, the waterproof sticker 100 is peeled off from the fabric substrate 200 in the direction of the arrow F. When the adhesion between the polyester hot melt adhesive 120 and the waterproof layer 210 is greater than the adhesion between the original waterproof layer 210 and the polyester substrate 220, the waterproof layer 210 originally adhered to the polyester substrate 220 will be Stripped. In this case, the adhesion strength called "perfect bonding" in the industry. According to an embodiment of the present invention, the adhesion between the waterproof layer 210 and the polyester substrate 220 is measured by the method of ASTM D2724 to be 1443 g/2.5 cm. Therefore, when the waterproof strip 100 provides the "perfect bonding" adhesive strength, it indicates that the adhesive force between the polyester hot melt adhesive 120 and the fabric substrate 200 is greater than 1443 g/2.5 cm.

Yet another feature of an embodiment of the invention is a low thickness. In addition to adhesion, the thickness of the polyester hot melt adhesive 120 is also an important consideration. Because for lightweight, moisture-permeable waterproof textiles, the thickness and weight of the textile itself are small. If the thickness of the polyester hot melt adhesive 120 is too large, the thickness of the overall waterproof adhesive strip 100 also increases. When the waterproof sticker 100 having a too large thickness is adhered to the lightweight moisture-permeable waterproof textile, the surface undulation break is large and is not accepted by the consumer. Therefore, in addition to the above adhesive considerations, the thickness of the integral waterproof strip 100 and the thickness of the polyester hot melt adhesive 120 are an important consideration. According to an embodiment of the present invention, the polyester hot melt adhesive 120 has a thickness of only 20-25 μm, and provides a "perfect bonding" adhesive strength. The thickness of the adhesive layer can be reduced by about 40-50% compared to conventional techniques. The total thickness of the waterproof strip can be reduced by about 20-30%. In addition, because the thickness of the waterproof strip is reduced, the waterproof strip at the seam has a soft touch and a better flexibility, so it is more suitable for use on lightweight moisture-permeable waterproof textiles.

Yet another feature of an embodiment of the invention is a low adhesion temperature and a low heating time. The temperature and time at which the heat is applied is very important. If the temperature of the heat bonding is too high or the time is too long, it may change the properties of the material to be laminated, which is not conducive to the final product. According to the embodiment of the present invention, the polyester hot melt adhesive 120 and the textile substrate exhibit a special wettability mechanism, so that the waterproof adhesive strip 100 of the embodiment of the present invention can reach the lower temperature and the shorter time. The bond strength of perfect bonding. Copolyester plays a very important role in the mechanism of wetting fabric substrates. Since the copolyester has physical properties such as a lower melting point, a higher MVI, and a lower viscosity, it can be sufficiently and rapidly filled into the surface of the substrate at a lower temperature during the heat bonding process. Micro holes. Furthermore, the first polyester and the second polyester interact with the copolyester to increase the adhesion strength.

Example

The following examples are intended to be illustrative of specific aspects of the invention, and are intended to be The following examples are not to be construed as limiting the invention.

Comparative example 1

The model D 1539E polyester resin was supplied as a polyester hot melt adhesive material by EMS Griltex, Switzerland, and a polyester hot melt adhesive layer having a thickness of 20-25 μm was formed on a polyester waterproofing membrane having a thickness of 15 μm to prepare a waterproof adhesive strip. The total thickness of the waterproof strip is 35-40 μm. Then, the prepared waterproof strips are heat-bonded to the polyester waterproof substrate at different temperatures and different heating times. Upon completion, the adhesion is measured by the method specified in ASTM D2724. The results of the heat bonding conditions and adhesion are summarized in Table 2.

In Comparative Example 1, the adhesion was 102, 123, and 157 g/2.5 cm at 140 ° C and a heating time of 30, 40, and 50 seconds, respectively. The waterproof strip of Comparative Example 1 must have a perfect bonding strength at 150 ° C and a heating time of 40 seconds. However, at 160 ° C, the heating time is 5-10 seconds, but the perfect bonding strength is not achieved. This result indicates that the stability of the material is insufficient and the heating time required is long.

Comparative example 2

In this comparative example, a waterproof strip was produced in the manner described in Comparative Example 1, except that the model 6E polyester resin was supplied by the EMS Griltex Company of Switzerland as a polyester hot melt adhesive material. The test results of adhesion strength are also summarized in Table 2. In Comparative Example 2, it was necessary to heat at 160 ° C for 10-15 seconds to achieve the perfect bonding strength. This result indicates that the hot melt material of Comparative Example 2 must be provided at a relatively high temperature to provide sufficient adhesion.

Comparative example 3

In this comparative example, a waterproof strip was produced in the manner described in Comparative Example 1, except that a copolyester was used as the polyester hot melt adhesive material. This copolyester is prepared by mixing glutaric acid, terephthalic acid, and 1,4 butanediol by copolymerization. The feed moles of the reactants glutaric acid, terephthalic acid, and 1,4 butanediol were 5 moles, 5 moles, and 13 moles, respectively. The adhesive strength of the waterproof strip prepared in Comparative Example 3 was summarized in Table 3.

In Comparative Example 3, the bonding strength of the perfect adhesion could not be achieved under the conditions of a temperature of 140 to 160 ° C and a heating time of 5 to 20 seconds. It is noted that the adhesion of this material at 140 ° C is 630-693 g / 2.5 cm, which is greater than the adhesion at 140 ° C of Comparative Example 1 and Comparative Example 2. In other words, the copolyester material of Comparative Example 3 exhibited a certain adhesive force at a lower temperature.

Comparative Example 4-8

In Comparative Example 4-8, the model 6E polyester resin described in Comparative Example 2 and the copolyester of Comparative Example 3 were blended in different weight ratios to obtain a polyester hot melt adhesive material as a waterproof sticker. The weight percentage of the type 6E polyester resin in the polyester hot melt adhesive is 20-60%, and the weight percentage of the copolyester in the polyester hot melt adhesive is 40-80%. The results of the polyester hot melt adhesive composition and adhesion strength of Comparative Examples 4-8 are summarized in Table 4. The waterproof strip prepared in Comparative Example 4-8 could not achieve the perfect bonding strength at a temperature of 140-160 ° C and a heating time of 5-20 seconds. Although the Model 6E polyester resin of Comparative Example 2 had a sufficiently strong adhesive force at 160 ° C, the copolyester of Comparative Example 3 exhibited a better adhesion at 140 ° C, but the resin was mixed with both, and Can't have individual features.

Example 1-6

In Examples 1-6, the model D 1539E polyester resin described in Comparative Example 1, the model 6E polyester resin described in Comparative Example 2, and the copolyester of Comparative Example 3 were blended in different weight ratios. Used as a polyester hot melt adhesive material for waterproof stickers. The results of the composition and adhesion strength test of the polyester hot melt adhesive of Examples 1-6 are summarized in Table 5.

The waterproof sticker of Example 5 can have a perfect adhesive adhesion strength at a temperature of 150 ° C and a heating time of 25 seconds, and at a temperature of 160 ° C, it takes only 5 seconds to have a perfect adhesive bond strength. Compared to Comparative Example 1, the heating time required for Example 5 was shortened by 15 seconds. And compared to Comparative Example 1, the heating temperature required for Example 5 was lowered by 10 °C. Further, in Example 3, at a temperature of 160 ° C and a heating time of 10 seconds, the adhesion strength which is also excellent in adhesion can be achieved. The adhesion strengths of Examples 1, 2, 4 and 6 were not satisfactory.

The waterproof strip of Example 5 has a "perfect bond" adhesive strength at lower temperatures and less time. This result shows that the polyester hot melt adhesive obtained by blending three different polyesters in a certain ratio can form a better wetting effect between the polyester hot melt adhesive and the textile substrate. Copolyesters play an important role in the mechanism of wetting fabric substrates due to the lower melting point, higher MVI, and lower viscosity of the copolyesters. Therefore, the polyester hot melt can sufficiently and quickly fill the micropores entering the surface of the substrate at a lower temperature. Furthermore, Model D 1539E polyester resin, Model 6E polyester resin and copolyester exhibited unexpected growth and increased adhesion strength.

Although the present invention has been disclosed in the above embodiments, it is not intended to limit the present invention, and the present invention can be modified and modified without departing from the spirit and scope of the present invention. The scope is subject to the definition of the scope of the patent application attached.

100. . . Waterproof sticker

110. . . Polyester waterproofing membrane

120. . . Polyester hot melt adhesive

200. . . Fabric substrate

210. . . Waterproof layer

220. . . Polyester substrate

F. . . direction

The above and other objects, features, advantages and embodiments of the present invention will become more apparent and understood.

FIG. 1 is a cross-sectional view showing a waterproof sticker 100 according to an embodiment of the present invention.

Figure 2 shows a schematic diagram of the test method for perfect bonding.

100. . . Waterproof sticker

110. . . Polyester waterproofing membrane

120. . . Polyester hot melt adhesive

Claims (10)

A waterproof sticker comprising: a polyester waterproofing membrane; and a polyester hot melt adhesive contacting and located on the polyester waterproofing membrane, the polyester hot melt adhesive comprising: a copolyester of from about 50 to about 80 parts by weight From about 5 to about 30 parts by weight of the first polyester, and the viscosity of the first polyester is greater than the viscosity of the copolyester; and from about 10 to about 40 parts by weight of the second polyester, and the second polyester The viscosity is greater than the viscosity of the first polyester. The waterproof strip of claim 1, wherein the copolyester has a viscosity of from about 100 to about 200 Pa×s, and the first polyester has a viscosity of from about 300 to about 700 Pa×s, the second polyester. The viscosity is from about 1500 to about 2500 Pa x s. The waterproofing strip of claim 1, wherein a melt volume index of the copolyester is greater than a melt volume index of the first polyester, and a melt volume index of the first polyester is greater than the second The melt volume index of the polyester. The waterproofing strip of claim 3, wherein the copolyester has a melt volume index of from about 40 to about 70 g/10 min, and the first polyester has a melt volume of from about 15 to about 25 g/10 min, The second polyester has a melt volume index of from about 1 to about 5 g/10 min. The waterproof strip of claim 1, wherein the polyester hot melt comprises: from about 55 to about 65 parts by weight of the copolyester; from about 5 to about 15 parts by weight of the first polyester; and from about 25 to about 35 Second polyester by weight. The waterproofing strip of claim 1, wherein a melting point of the copolyester is lower than a melting point of the first polyester, and a melting point of the first polyester is lower than a melting point of the second polyester. The waterproofing strip of claim 6, wherein the copolyester has a melting point of from about 110 ° C to about 125 ° C, and the first polyester has a melting point of from about 120 ° C to about 130 ° C, the melting point of the second polyester. It is from about 125 ° C to about 135 ° C. The waterproof strip of claim 1 wherein the copolyester is from about 2 to about 10 parts by weight glutaric acid, from about 60 to about 70 parts by weight terephthalic acid, and from about 20 to about 38 parts by weight. 1,4 butanediol is produced by copolymerization. The waterproofing strip of claim 1, wherein the polyester waterproofing membrane comprises a polyester-polyether copolymer, and one of the polyester waterproofing membranes has a thickness of about 10-20 μm, and the polyester hot melt adhesive One of the thicknesses is about 20-25 μm. The waterproofing strip of claim 1, wherein the first polyester has a glass transition temperature, a melting point, a melt volume index, and a viscosity of about 10.8 ° C, about 126 ° C, about 19.4 g/10 min, and about 500 Pa × s, respectively. The glass transition temperature, melting point, melt volume index and viscosity of the first polyester are about 25.8 ° C, about 130 ° C, about 2.1 g/10 min, and about 1974 Pa × s, respectively.