JP3942367B2 - Sealing tape and manufacturing method thereof - Google Patents

Description

【００４６】
【発明の効果】
本発明の目止めテープは、ポリエステル系エラストマーのみで構成されているため、廃棄時に焼却処理することが容易である。また、水による洗濯後も接着力が高く、家庭での洗濯が可能な優れた目止めテープである。また、本発明の製造方法によって優れた目止めテープを提供することができる。[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a sealing tape made of a polyester elastomer and excellent in adhesiveness, and a method for producing the same. In particular, the present invention relates to a sealing tape suitable for waterproof clothing.
[0002]
[Prior art]
A waterproof fabric made of a fiber base fabric and a resin film, particularly a moisture-permeable waterproof fabric made of a moisture-permeable resin film, is used for raincoats, windbreakers, and the like. When sewing these waterproof fabrics, sealing tape is used to cover the waterproofness of the perforated portion. As the sealing tape, a heat-fusible tape in which thermoplastic polyolefin, thermoplastic polyurethane, or the like is applied to a film made of polyolefin or polyurethane is generally used.
[0003]
However, when these resins are used as sealing tapes, there are problems such as inability to recycle and generation of toxic gases during combustion. Further, when the product is washed with water that is used in a general household, there is a problem that peeling due to a decrease in adhesive force or damage to the base portion occurs, and comfort is impaired.
[0004]
[Problems to be solved by the invention]
The present invention has been made in view of the above prior art, and an object thereof is to provide a sealing tape that can be recycled and is friendly to the global environment even during combustion, and a method for manufacturing the same.
[0005]
[Means for Solving the Problems]
The sealing tape of the present invention is formed by laminating a base portion made of a polyester elastomer having a melting point of 150 ° C. or more and an adhesive layer made of a polyether-ester elastomer having a melting point of 50 ° C. or more and 130 ° C. or less , The polyester elastomer of the base portion is a polyether-ester elastomer .
[0006]
The method for producing the sealing tape of the present invention comprises a polyester elastomer having a melting point of 150 ° C. or higher , and a melting point of 50 ° C. or higher and 130 ° C. or lower on a film in which the polyester elastomer is a polyether-ester elastomer. An organic solvent solution in which a polyether-ester elastomer is dissolved at a concentration of 2 to 30% by weight is applied, and then the organic solvent is removed.
[0007]
The waterproof fabric product of the present invention is characterized in that the stitched portion of the fabric is waterproofed using the sealing tape of the present invention.
[0008]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail.
The sealing tape of the present invention uses a polyester elastomer for the base portion in order to follow the unevenness of the stitched portion and improve the recyclability. Here, as the polyester elastomer, when a hard segment is a high melting point and highly crystalline aromatic polyester and a soft segment is a polyether-polyester elastomer comprising an amorphous polyether, it is excellent in flexibility and hydrolysis resistance. A sealing tape is obtained. On the other hand, when a polyester-polyester elastomer with a hard segment of high melting point and high crystalline aromatic polyester and a soft segment of amorphous polyester is used, a sealing tape with excellent weather resistance and chemical resistance can be obtained. It is done.
[0009]
As the hard segment of the polyether-ester elastomer preferably used, for example, terephthalic acid, naphthalenedicarboxylic acid, 4,4′-diphenyldicarboxylic acid and the like are used as main acid components, and alkylene such as ethylene glycol, propylene glycol, and tetramethylene glycol. An aromatic polyester having glycol as a main diol component can be exemplified.
[0010]
When the hard segment diol is a mixture of ethylene glycol and tetramethylene glycol, and the proportion of ethylene glycol in the diol is 30 mol% or more, high wear resistance is ensured. be able to.
[0011]
On the other hand, as the non-crystalline polyether of the soft segment, polyethylene glycol, poly-1,2-propylene glycol, poly-1,3-propylene glycol, polytetramethylene glycol, a copolymer of ethylene oxide and propylene oxide, ethylene oxide and Examples include polyalkylene glycols such as a copolymer with tetrahydrofuran. If the number average molecular weight of the polyalkylene glycol is too small, it is difficult to obtain sufficient mechanical properties, and if it is too large, phase separation is likely to occur and adjustment of the polyether-polyester elastomer is difficult. The range of is appropriate.
[0012]
In addition, moisture permeability improves as the amount of polyethylene glycol component in the soft segment increases, but if it increases too much, water resistance tends to decrease, and washing resistance tends to decrease, so the ratio is set according to the application In particular, polyethylene glycol is preferably 25% by weight or less based on the total weight of the polyether-ester elastomer.
[0013]
Next, the polyester-polyester elastomer hard segment preferably used is an aromatic polyester composed of an aromatic dicarboxylic acid and a diol, such as polybutylene terephthalate composed of terephthalic acid and 1,4-butanediol. On the other hand, as a soft segment, for example, an aromatic polyester composed of isophthalic acid and a long-chain diol component such as hexamethylene glycol or octamethylene glycol, or a diol component having a side chain such as 2-methyl-1,5-heptanediol, adipic acid And aliphatic polyesters composed of aliphatic carboxylic acids such as sebacic acid and diol components such as tetramethylene glycol and diethyl glycol.
[0014]
The weight ratio of the soft segment to the hard segment in the polyester-based elastomer of these base portions is suitably in the range of 25/75 to 75/25. Moreover, various stabilizers, ultraviolet absorbers, and the like may be blended in the polyester elastomer as necessary.
[0015]
The melting point of the polyester elastomer in the base portion needs to be 150 ° C. or higher. Most preferably, it is 250 degrees C or less, Furthermore, it is 170-230 degreeC. When the melting point of the elastomer of the base portion is low, dissolution of the base portion tends to occur during thermal bonding between the sealing tape and the fabric.
[0016]
Although there is no restriction | limiting in particular about the thickness of a base | substrate part, when handling property is considered, 5-100 micrometers is preferable, Furthermore, 10-50 micrometers is preferable.
[0017]
Furthermore, the polyester elastomer of the base part used in the present invention has an area swelling ratio of less than 5% after a 15 μm-thick film formed from the polyester elastomer is treated at a water temperature of 40 ° C. for 30 minutes. Is preferred. In the case of a film having an area swelling rate of 5% or more, the water pressure resistance tends to decrease due to washing with water.
[0018]
The adhesive layer of the sealing tape of the present invention is a polyether-ester elastomer. The polyether-polyester elastomer used for the adhesive layer is the same as that described in the base portion, and uses a high melting point and high crystalline aromatic polyester for the hard segment and amorphous polyether for the soft segment.
[0019]
Further, the melting point of the polyether-ester elastomer of the adhesive layer is essential to be 50 ° C. or higher and 130 ° C. or lower, and more preferably 70 to 110 ° C. from the viewpoint of workability. When the temperature exceeds 130 ° C., it becomes difficult to adhere the sealing tape under the conditions of normal use, or the efficiency of the heat treatment process decreases. When the temperature is lower than 50 ° C., it is not solidified at room temperature, so that the handleability is deteriorated. For example, it cannot be stored by winding or stacking a sealing tape. Furthermore, it is preferably 40 to 100 ° C. lower than the melting point of the elastomer of the base portion. The adhesive layer may contain a small amount of a solvent, but when it is stored by being wound or stacked, the organic solvent content is preferably less than 2% by weight.
[0020]
Adhesion amount of the elastomer of the adhesive layer is preferably 5 to 100 g / m ^2, more preferably a 10 to 50 g / m ^2. When the amount is less than 5 g / m ² , the adhesive force to the uneven fabric tends to decrease, and when it exceeds 100 g / m ² , the texture tends to deteriorate.
[0021]
The peel strength of the sealing tape of the present invention is preferably 5 N / 2.54 cm or more, more preferably 8 N / 2.54 cm or more. The peel strength after washing with water 10 times is preferably 5 N / 2.54 cm or more, and more preferably 7 N / 2.54 cm or more. This peel strength is the peel strength when the sealing tape is thermally fused to the polyester fabric as will be described later.
[0022]
Although the method of manufacturing the sealing tape of the present invention described above is not particularly limited, for example, it can be manufactured by the following method.
That is, it is a production method in which an organic solvent solution in which a polyether-ester elastomer is dissolved is applied on a film made of a polyester elastomer, and then the organic solvent is removed.
[0023]
More specifically, a film made of a polyester-based elastomer having a melting point of 150 ° C. or higher as a base portion is first prepared. As the polyester-based elastomer film, the polyether-ester elastomer or polyester-ester-based elastomer used for the base portion described above is used. Moreover, as a method of producing a film, any conventionally known method may be used. For example, the film can be formed by a melt extrusion method or a solvent casting method by dissolving in an organic solvent.
[0024]
Next, a solution is prepared by dissolving a polyether-ester elastomer having a melting point of 50 ° C. or higher and 130 ° C. or lower as an adhesive layer in an organic solvent. Preferred organic solvents include dimethylformamide, dioxane, 1,3-dioxolane, toluene, chloroform, and methylene chloride, and two or more kinds may be used in combination. Among these, 1,3-dioxolane is preferable because it has a low boiling point and low toxicity, and particularly, 80% or more of 1,3-dioxolane is preferable based on the weight of the organic solvent. At this time, 2 to 30% by weight of the polyether-ester elastomer is dissolved based on the weight of the solvent, but 5 to 25% by weight is more preferable from the viewpoint of workability. Moreover, the temperature at the time of melt | dissolution is 50-65 degreeC, and it is easy to work, and is suitable.
[0025]
And the solution which melt | dissolved the polyether-ester type elastomer is apply | coated on the film used as a base | substrate part. As a coating method, any coating method such as a knife coater and a gravure coat can be employed. About removal of organic solvents, such as 1, 3- dioxolane, what is necessary is just to employ | adopt the dry process which removes a solvent under 70-120 degreeC, Preferably 70-100 degreeC dry heat. At this time, the organic solvent may remain if the amount is small, but it is preferably removed so that the organic solvent content is less than 2% by weight.
[0026]
In order to improve the quality of the obtained sealing tape, a fabric may be bonded to the side opposite to the adhesive layer of the base portion. Further, in addition to sealing the sewn product, it can also be used for applications such as a material for repairing a sewn product, a hemming tape, a patch, and a patch.
[0027]
The obtained sealing tape is used after being cut into a size corresponding to the intended use. At this time, the shape is not necessarily limited to a tape shape, and may be cut into a sheet-shaped piece. When used, the sealing tape is brought into contact with the adherend and bonded by a known method such as hot pressing, hot air, ultrasonic wave, high frequency or the like. For example, in hot pressing, bonding is performed by heating for a predetermined time at a temperature not lower than the melting point of the elastomer of the adhesive layer and not higher than the melting point of the elastomer of the base portion. Examples of the heating method of the hot press include a method using a heating calendar, an iron, a hot press, a hot air machine, and the like.
[0028]
The waterproof fabric sewing product of the present invention is characterized in that the stitched portion of the fabric is waterproofed using the above-described sealing tape.
The fabric having the sewing portion is not particularly limited, and any fabric may be used. However, a fabric in which one side or both sides of the base fabric is coated with a resin is preferable because a product particularly excellent in waterproofness can be obtained. As the base fabric, woven fabrics, knitted fabrics, nonwoven fabrics and the like made of synthetic fibers and natural fibers are optional, but those made of polyester-based synthetic fibers such as polyethylene terephthalate are particularly preferable. Moreover, as resin which coat | covers a base fabric, polyester-type resin is preferable, for example, what coat | covered polyether-ester type resin is mentioned. By using all of the fabric for the polyester resin, all members of the fabric and the sealing tape are polyester, so that the recyclability of the entire sewing product is improved. Further, since the adhesive layer of the sealing tape of the present invention is a polyester-ether elastomer, it has a high affinity with polyester, and in the case of a fabric made of a polyester resin, the polyester fiber as a base fabric and the polyester resin as a coating layer Adhesive strength with any of is high.
[0029]
To give more specific examples of fabrics, for example, a yarn having a single fiber fineness of 0.5 to 5 dtex and a high-density woven fabric having a cover factor (CF) of 1500 to 4000 is coated with a polyether-ester elastomer. This is a moisture permeable waterproof fabric. By using the sealing tape of the present invention at the sewing portion, the product is excellent in recyclability and has both quality and texture. Here, CF is the square root of (warp filament fineness (dtex) × 9/10) × the number of warp implants (number / 2.54 cm) + (square root of weft filament fineness (dtex) × 9/10) × the number of weft implants. (Number / 2.54 cm).
[0030]
【Example】
EXAMPLES Hereinafter, although an Example demonstrates this invention further, this invention is not restrict | limited by this. In the examples, each physical property value was measured by the following method, and the elastomer used in the examples was produced by the method of the reference example. “Parts” in the examples represents “parts by weight”.
[0031]
(1) Using a melting point differential scanning calorimeter (DSC29290, manufactured by TA instrument), the temperature was measured in a nitrogen stream at a heating rate of 10 ° C./min.
[0032]
(2) Peel strength A test piece was prepared by thermally bonding a binder surface of a sealing tape (2 cm width × 9 cm length) and a polyester fabric by applying a linear pressure of 200 N / cm with a thermal calendar at a predetermined temperature. Then, referring to JIS K-6301, a cloth adhesive tape (Nitto Denko No. 750) of the same size as the tape surface of the test piece was bonded with mangles and pressure-bonded with mangles at 1 kPa / cm ² , and then tested. Set the piece and cloth adhesive tape between the chucks facing each other (20mm) of the tensile tester, and peel the base cloth and coating layer by widening the distance between chucks at a pulling speed of 50mm / min. The average stress excluding the peeling was read and converted to the stress per 25.4 mm (1 inch) width of the sample as the peeling strength. When the cloth adhesive tape was peeled off without breaking the test piece, it was indicated as “10>”. The polyester fabric used was a plain weave with warp 62 dtex / 36 fil, number of driven 122 / 2.54 cm, weft 92 dtex / 72 fil, number of driven 97 / 2.54 cm.
[0033]
(3) Peel strength after 10 washings (after peel strength L10)
The washing operation defined in Appendix Table No. 103 of JIS L 0217 is defined as 1 cycle (1 time), and 10 cycles (10 times) of washing (L10) are repeated accordingly, and then the peel strength test of (2) is performed. Went.
[0034]
(4) Area swelling rate A film having a size of 10 cm in length, 10 cm in width, and 15 μm in thickness was prepared, immersed in water at 40 ° C. for 30 minutes, and the area swelling rate was calculated by the following formula.
Swelling rate (%) = (area after immersion / area before immersion-1) × 100
[0035]
[Reference Example 1]
(Preparation of an elastomer film for a substrate having a melting point of 190 ° C.)
Reaction equipped with 194 parts of dimethyl terephthalate (DMT), 115 parts of tetramethylene glycol (TMG), 124 parts of polytetramethylene glycol (PTMG) (average molecular weight 2000), and 0.391 parts of tetrabutyl titanate as a catalyst The reaction product was charged into a vessel and transesterified for 210 minutes while removing methanol produced in the reaction can at 220 ° C. in a nitrogen gas atmosphere. After completion of the transesterification reaction, the transesterification product was transferred to a reaction vessel heated to 240 ° C. equipped with a stirring device, a nitrogen inlet, a vacuum port, and a distillation device, and the reaction mixture was mixed with Sumizer GS (Sumitomo). (Chemical Industry Co., Ltd.) 0.31 part was added and the atmosphere was replaced with nitrogen, then at normal pressure for about 10 minutes, 1995-2660 Pa (15-20 mmHg) for about 30 minutes, and further 13.3 Pa (0.1 mmHg) at 255 After the polycondensation reaction was performed by raising the temperature to 0 ° C. and reached a predetermined melt viscosity, 0.62 parts of Sumilizer GA-80 (manufactured by Sumitomo Chemical Co., Ltd.) was added as an antioxidant to terminate the reaction. The chip was made by the method. The melting point of the obtained polyether-ester elastomer was 190 ° C. The polyester elastomer was formed into a film of 50 μm on a release paper by a known melt extrusion method.
The area swelling ratio of the 15 μm-thick film formed from this elastomer with water was 0%.
[0036]
[Reference Example 2]
(Preparation of elastomer film for substrate part having a melting point of 192 ° C.)
Transesterification of 180 parts of dimethyl terephthalate, 20 parts of dimethyl sebacate, 140 parts of tetraethylene glycol and 30 parts of diethylene glycol with a dibutyltin diacetate catalyst followed by polycondensation under reduced pressure gave a polyester (S, soft segment). It was.
[0037]
A polybutylene terephthalate (H, hard segment) chip was dried on this polyester (S), added 170 parts, reacted at 240 ° C. for another 45 minutes, and then added 0.1 part of phenylphosphonic acid. The reaction was stopped. The melting point of this polyester-ester elastomer was 192 ° C. The polyester elastomer was formed into a film of 50 μm on a release paper by a known melt extrusion method.
The area swelling ratio of the 15 μm-thick film formed from this elastomer with water was 0%.
[0038]
[Reference Example 3]
(Preparation of an elastomer film for a substrate having a melting point of 145 ° C.)
A transesterification reaction was carried out by charging 210 parts of dimethyl terephthalate (DMT), 63.6 parts of isophthalic acid (IA), 193.3 parts of tetramethylene glycol (TMG) and 199 parts of polytetramethylene glycol (PTMG) in a reaction vessel. To obtain a monomer. PTMG having an average molecular weight of 1500 was used. As a result of polymerization in the same manner as in Reference Example 1, a polyether-ester elastomer having a melting point of 145 ° C. was obtained. The polyester elastomer was formed into a film of 50 μm on a release paper by a known melt extrusion method.
[0039]
[Reference Example 4]
(Preparation of elastomer for adhesive layer having a melting point of 107 ° C.)
31.5 parts of dimethyl isophthalate (IMT), 18.1 parts of tetramethylene glycol (TMG) and 32.7 parts of polytetramethylene glycol (PTMG) were charged into a reaction vessel, and a transesterification reaction was performed to obtain a monomer. . Thereafter, a polycondensation reaction was performed while raising the temperature and pressure to obtain a polyether-ester elastomer. PTMG having a number average molecular weight of 1000 was used. The melting point of this polyether-ester elastomer was 107 ° C.
[0040]
[Example 1, Reference Example 1 ]
Using the films obtained in Reference Examples 1 and 2 as a substrate, 25 parts of the elastomer obtained in Reference Example 4 was completely dissolved in 75 parts of 1,3-dioxolane heated to 60 ° C. Using a gravure coater of 32, coating was performed on the films obtained in Reference Examples 1 and 2 so as to have a solid content of 10 g / m ^2, and at 80 ° C., the organic solvent content was 2 wt% or less. Removal was performed.
[0041]
Table 1 shows the adhesion of the sealing tape obtained when the calendar temperature is 140 ° C. Also, a high density polyester woven fabric (warp 62 dtex / 36 fil, number of driven 122 / 2.54 cm, weft having a single fiber fineness of warp 1.7 dtex and weft 1.3 dtex and a cover factor (CF) of 1800. 92 dtex / 72 fil, 97 weaves / 2.54 cm plain weave) using a moisture-permeable waterproof fabric in which a polyether-ester elastomer is laminated, and a waterproof fabric product using this sealing tape at the sewing part has an excellent texture The product was also recyclable.
[0042]
[Example 2 ]
A sealing tape was prepared in the same manner as in Example 1 except that the basis weight of the adhesive layer was applied so that the solid content was 7 g / m ² .
Table 1 also shows the adhesiveness of the obtained sealing tape when the calendar temperature is 140 ° C.
[0043]
[Comparative Example 1]
A sealing tape was prepared in the same manner as in Example 1 except that the film obtained in Reference Example 3 was used as a substrate.
Table 1 also shows the adhesiveness of the obtained sealing tape when the calendar temperature is 130 ° C and 150 ° C.
[0044]
[Comparative Example 2]
A sealing tape was prepared in the same manner as in Example 1 except that the melting point of the adhesive layer was changed to that shown in Table 1.
Table 1 also shows the adhesiveness of the obtained sealing tape when the calendar temperature is 150 ° C and 170 ° C.
[0045]
[Table 1]

[0046]
【The invention's effect】
Since the sealing tape of the present invention is composed only of a polyester-based elastomer, it can be easily incinerated at the time of disposal. In addition, it is an excellent sealing tape that has high adhesive strength even after washing with water and can be washed at home. Moreover, the sealing tape excellent in the manufacturing method of this invention can be provided.

Claims (4)

A base portion having a melting point consisting of 0.99 ° C. or more polyester-based elastomer, a melting point of 50 ° C. or higher 130 ° C. or less of the polyethers - and is the ester of elastomeric adhesive layer is laminated, polyester-based elastomer of the base body is poly A sealing tape, which is an ether-ester elastomer . A polyether-ester elastomer having a melting point of 50 ° C. or more and 130 ° C. or less is formed on a film comprising a polyester elastomer having a melting point of 150 ° C. or more , and the polyester elastomer is a polyether-ester elastomer. A method for producing a sealing tape, comprising: applying an organic solvent solution dissolved in%, and then removing the organic solvent. The method for producing a sealing tape according to claim 2 , wherein the organic solvent is dimethylformamide, dioxane, 1,3-dioxolane, toluene, chloroform, methylene chloride or a mixture thereof.   A waterproof fabric sewing product, wherein the stitched portion of the fabric is waterproofed using the sealing tape according to claim 1.