KR20070098692A - Waterproof slide fastener - Google Patents

Abstract

A waterproof slider fastener is provided to have excellent engaging strength and water tightness by increasing the fixation strength between a fastener tape and a fastener element, and improving adhesion of the fastener tape to a coated material. A waterproof slider fastener has a waterproof structure comprising a couple of fastener stringers(2) and a slider. Plural fastener elements are integrally formed along the opposed element attachment corner portions(11) of a couple of waterproof fastener tapes in which a waterproof layer is coated with a band shaped core material made of a cloth, a knitwear or a non-woven fabric. The slider makes the fastener elements engaged and separated. The waterproof layer is made of a polyurethane elastomer. The fastener element is made of a polyurethane resin, an ABS resin and polymer alloy.

Description

Waterproof Slide Fastener {WATERPROOF SLIDE FASTENER}

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a plan view of an essential part showing the engaging portion of the slide fastener of the present invention.

2 is an enlarged plan view showing a fastener element of the slide fastener;

3 is a cross-sectional view taken along the line III-III shown in FIG. 1;

4 is a graph showing the measurement results of the transverse pull strength.

5 is a graph showing a measurement result of pushing strength.

6 is a graph showing a measurement result of pulling strength.

7 is a graph showing a measurement result of slip strength.

<Explanation of symbols for main parts of the drawings>

1: waterproof slide fastener

2: fastener stringer

10: Fastener Tape

11: Element Attachment Corner

11a: end edge

12: core material

13: waterproof layer

14: through hole

21: Fastener Element

21a, 21b: upper and lower half of the fastener element

22: engaging head

22a, 22b: upper half and lower half of the engaging head portion

23: neck

23a, 23b: upper half and lower half of the neck

24: fuselage

24a, 24b: upper half and lower half of the fuselage

25 shoulder

25a, 25b: upper and lower half of the shoulder

26: forked

27: leg

27a, 27b: upper and lower half of the legs

28: connection

L1: Opening length of the end edge of the element attachment corner

[Document 1] Japanese Utility Model Publication No. 63-30247

[Document 2] Japanese Unexamined Patent Publication No. 2005-237577

The present invention provides a slider to a pair of fastener stringers formed by integrally forming a plurality of synthetic fastener elements in a molded unit at a corner of an element attachment edge of a waterproof fastener tape coated with a band-like core material knitted or knitted. A waterproof slide fastener penetrated.

In this type of waterproof slide fastener, a pair of right and left fastener tapes are provided, and each fastener tape has a band member or a band-shaped nonwoven fabric which is knitted or knitted with a fiber thread as the core material. Both surfaces of the front and back surfaces are coated with an waterproof layer made of an elastomer. In addition, one side edge portion of the pair of fastener tapes is formed as an element attachment edge portion, and the fastener element made of a synthetic resin is molded and integrated by injection molding or the like so as to span both sides of the front and rear surfaces of the tape along the element attachment edge portion. Fastener stringers are formed. In addition, a slider for engaging and disengaging the left and right fastener elements is inserted into the element string of the fastener stringer.

In general, in the waterproof slide fastener, through-holes penetrating the front and back surfaces of the fastener tape are formed in advance in the forming portions of the fastener tapes at the element attachment edges of the fastener tape, and forming each element having the through-holes. By injection molding the synthetic resin into the site, the through-hole becomes a passage of the synthetic resin, so that the fastener element is sandwiched between the element attachment corners, and is formed in a symmetrical shape on both surfaces of the tape and the back surface. In addition, each fastener element is formed by connecting the upper half of the element on the tape surface side and the lower half of the element on the back side by a connecting portion that penetrates the through hole, thereby increasing the connection strength between the fastener tape and the fastener element.

An example of the conventional waterproof slide fastener comprised in this way is described in Unexamined-Japanese-Patent No. 63-30247 (document 1), Unexamined-Japanese-Patent No. 2005-237577 (document 2).

For example, in the waterproof slide fastener described in Document 1, a waterproof layer is formed on the front surface and the rear surface of the fastener tape, and a through hole is formed in the corner portion of the fastener tape. In addition, the fastener element has upper and lower half portions formed on the front and rear surfaces of the element attachment edge portion, and the upper and lower half elements of the element are integrated by a connecting portion that penetrates the through hole of the element attachment edge portion. In addition, in the waterproof slide fastener of Document 1, an adhesive layer is formed on both surfaces of the fastener tape at least on the front and rear surfaces of the fastener tape, and the fastener tape and the fastener element around the through hole are formed by the adhesive layer. The boundary part which contacts is closed and the watertightness in the said boundary part is maintained.

On the other hand, in the document 2, a waterproof slide fastener having a feature in the shape of the fastener element is described. One of the waterproof slide fasteners described in this document 2 is a fastener tape from an engaging head portion, a neck portion, a fuselage portion and the fuselage portion, wherein each fastener element is formed of an upper half portion and a lower half portion formed integrally with the tape surface and the back surface. It has a leg part which protrudes toward the inner side of the part, and the half part is integrated by the connection part through the through-hole formed in the edge part with a fastener element. Moreover, in each fastener element, each half of the engaging head portion and the leg portion is formed to have a thickness thinner in the direction orthogonal to the fastener tape surface and the back surface than each half portion of the neck portion and the trunk portion. In addition, the upper half and the lower half of the leg portion slide and guide the upper and lower flanges of the slider, and two or more are arranged at a necessary interval in the sliding direction of the slider.

In the waterproof slide fastener of Document 2 in which a fastener element having such a shape is formed at an edge portion at which an element is attached, two or more upper and lower portions of the leg portion for guiding the sliding movement of the slider are arranged in the sliding direction. The sliding resistance in the slide is reduced, and the sliding operation of the slider is made light. In addition, when performing the injection molding of the fastener element, the fastener tape is pressed from both surfaces of the front and rear surfaces by the mold surface between the half forming cavities for the legs, so that the fastener tape at the time of molding does not cause fluctuations. Each leg portion is strongly welded and integrated on both surfaces of the fastener tape and the back surface. Thereby, the advantage that the fastening strength of a fastener element with respect to a fastener tape increases, etc. can be acquired.

In the document 1 or document 2, the fastener tape of the waterproof slide fastener has a strip member woven or knitted with a fiber yarn as a core material, and a waterproof layer is coated on both surfaces of the strip-shaped core material and on both sides of the back surface. It is described that an elastomer such as natural rubber or synthetic rubber is used as the waterproof layer. However, these documents 1 and 2 roughly describe a material applicable as a waterproofing layer, and in most waterproof slide fasteners currently on the market, thermoplastic polyester having excellent strength, durability, molding processability, and the like as the waterproofing layer. Elastomers (specifically, Hytrel®) are generally used. Moreover, as a material of the fastener element formed in this fastener tape, the polybutylene terephthalate which is good in adhesiveness with Hytrel (trademark) and is durable is used.

On the other hand, in recent years, since the use of a waterproof slide fastener is expanded, the thing which adheres a waterproof slide fastener is also diversified, and the improvement of adhesiveness with a to-be-adhered object is required for a waterproof slide fastener. However, although the thermoplastic polyester elastomer which coat | covers the fastener tape as mentioned above is excellent in strength and moldability, there exists a surface which is inadequate in adhesiveness to a polyurethane-based adherend. For this reason, the fastener tape in which the waterproofing layer which consists of thermoplastic polyester elastomers was formed had difficulty in adhesiveness with a polyurethane-type material and a urethane-coated material. In particular, when a waterproof slide fastener having a waterproof layer formed of a polyester elastomer is intended to be installed, for example, on a polyurethane-based adherend, it is impossible to employ high frequency welding, which is commonly used, so that sewing or adhesives are required, resulting in cumbersome work. There was no choice but to.

In addition, polyester elastomers have a lack of flexibility as elastomers. For this reason, the fastener tape on which the polyester elastomer is coated tends to be relatively hardened, and there existed the difficulty of low flexibility when bending or twisting a tape in U-shape on the front and back surface, for example. Therefore, when the waterproof slide fastener formed of the polyester elastomer in the waterproof layer is attached to an adherend such as, for example, a wet suit, the installation portion of the waterproof slide fastener is hardened, so that the adherend is worn or When I took off, I felt pain or lowered a feeling of wearing.

Moreover, in order to improve the adhesiveness with a polyurethane adherend, as a waterproof layer formed in a fastener tape, it is easier to adhere with a polyurethane adherend than a polyester elastomer, for example, and to use a flexible polyurethane elastomer is used. Is considered. However, when the waterproof layer of the fastener tape is simply formed of polyurethane elastomer, the adhesiveness of the polybutylene terephthalate agent to the fastener element is greatly reduced.

Because of this, each fastener element As described above, even when the upper half and the lower half are integrally connected to each other through the through-holes of the element attachment corners, and formed on the fastener tape, the fastening strength between the fastener tape and the fastener element is inevitably lowered, and the engagement strength of the waterproof slide fastener is increased. In some cases, the watertightness may be reduced, or the fastener element may rotate around the connecting portion, thereby preventing the left and right elements from being engaged.

This invention is made | formed in view of the said prior art, The specific objective is that a fastener tape is excellent in adhesiveness with adherends, such as a urethane coat, and bendability is also favorable, and the fixing strength between a fastener tape and a fastener element is also good. The present invention provides a waterproof slide fastener having high engagement strength and water tightness.

In order to achieve the above object, the waterproof slide fastener provided by the present invention has, as a basic configuration, with a pair of waterproof fastener tapes facing each other covered with a waterproof layer of a strip-shaped core material made of a woven fabric, a knitted fabric, or a nonwoven fabric. A slide fastener having a waterproof structure including a pair of fastener stringers formed by forming a plurality of fastener elements along a corner and arranged in a row, and a slider for engaging and disengaging the fastener elements, wherein the waterproof layer is formed of a polyurethane elastomer. The main feature is that the fastener element is made of a polymer alloy of a polyurethane resin and an ABS resin.

Moreover, as for the waterproof slide fastener of this invention, it is preferable that the ratios (polyurethane resin / ABS resin) of the said polyurethane resin and the said ABS resin in the said polymer alloy are 20/80-50/50 by weight ratio.

EMBODIMENT OF THE INVENTION Hereinafter, preferred embodiment in this invention is described in detail, referring drawings. In addition, this invention is not limited to embodiment described below at all, Various changes are possible as long as it has substantially the same structure as this invention, and exhibits the same effect. For example, in this invention, the shape, dimension, etc. of a fastener element are not specifically limited to the following embodiment, It is possible to change suitably as needed.

1 is a plan view showing a part of a waterproof slide fastener according to the present embodiment, and FIG. 2 is an enlarged plan view showing a fastener element included in the slide fastener. 3 is a cross-sectional view taken along the line III-III shown in FIG.

The waterproof slide fastener 1 according to the present embodiment forms an engagement gap with the counterpart fastener element 21 along the element attaching edge portion 11 disposed at one corner of the waterproof fastener tape 10 to form a plurality of fasteners. A fastener stringer 2 in which the element 21 is molded integrally, a slider made of a synthetic resin or a metal which engages and disengages the left and right fastener elements 21, although not shown, and an upper stop member and an opening not shown. A separation fitting insertion member is provided.

The fastener tape 10 is covered with a waterproof layer 13 made of polyurethane elastomer on the front and back surfaces of a strip-shaped core material 12 made of a textile yarn, knitted fabric or nonwoven fabric. Thus, since the fastener tape 10 is covered with the polyurethane elastomer, waterproofness can be ensured and the installation of the polyurethane-based or urethane coating on the adherend can be easily performed by high frequency welding. Moreover, compared with the fastener tape by which polyester elastomer was coat | covered, for example, fastener tape itself becomes soft and can obtain favorable flexibility. In addition, through-holes 14 each having a sufficient size to allow the raw material resin in the molten state of the fastener element 21 to pass through each element forming portion of the element attachment corner portion 11 of the fastener tape 10. ) Are formed respectively.

The fastener element 21 has an engagement head portion 22 having an elliptic shape, a substantially hexagonal body portion 24 continuous to the engagement head portion 22 through a neck portion 23, and the neck portion. A blade-shaped shoulder 25 extending from side to side between the 23 and the body part 24, and branched from the lower end of the body part 24 through the forked part 26 to extend downwardly. It is comprised by the leg part 27. The fastener element 21 having such a configuration has an upper half and a lower half with the element attaching edge 11 of the fastener tape 10 interposed therebetween, and the upper half and the lower half are formed in the through hole 14. The connection is integrated through the connection 28.

Each half 22a, 22b; 23a, 23b; 24a, 24b; 25a, 25b of the engaging head portion 22, the neck portion 23, the fuselage portion 24, the shoulder portion 25 and the leg portion 27 Each of 27a and 27b is molded integrally in a symmetrical shape with the tape 10 interposed between the front and back surfaces of the fastener tape 10. Here, each of the half portions 23a, 23b; 24a, 24b; 25a, 25b; 27a, 27b except for the engaging head portion 22 is fused and integrated on both surfaces of the fastener tape 10 and the rear surface thereof.

The half portions 22a, 22b of the engaging head portion 22, which are symmetrically formed up and down with the fastener tape 10 interposed therebetween, are end edges 11a of the element attachment edge portion 11 of the fastener tape 10. ) Is slightly extended to the outside, and is formed by extending and protruding outwardly from the end edge 11a to the outside. At this time, the top edge length L1 of the end edge 11a of the element attachment edge portion 11 protruding from the shoulder 25 is engaged with the mating head portion 22 on the opposing side. ) Is set to a dimension in which the top end face of the) is pressed against each other with the top end face of the fastener tape 10 on the opposite side. For this reason, the opposing end faces of the fastener tape 10 are in contact with each other in the engaged state to exhibit waterproofing performance.

On the other hand, each of the half portion 23a, 23b; 24a, 24b: 25a, 25b; 27a, 27b of the neck portion 23, the body portion 24, the shoulder portion 25 and the leg portion 27 are all fastener tapes. It is in close contact with the element attachment edge part 11 of (10). Among these, the thickness of each half 23a, 23b: 24a, 24b of the neck portion 23 and the body portion 24 is the thickest, and each half 25a, of the shoulder 25 and the leg 27, is thickest. The thickness of 25b; 27a, 27b is approximately 1/3 of the thickness of each of the half portions 23a, 23b; 24a, 24b of the neck portion 23 and the body portion 24.

Moreover, the outer surface of the half part 22a, 22b of the said engagement head part 22 is the outer surface of each half part 23a, 23b; 24a, 24b of the said neck part 23 and the fuselage part 24. As shown in FIG. Is coplanar with. With such a configuration, when the fastener elements 21 are engaged with each other, left and right sides on the inner surfaces of the half portions 22a and 22b of the engaging head portion 22 of one fastener element 21 as shown in Figs. Halves 25a and 25b of each shoulder 25 of the fastener element 21 adjacent to each other are brought into contact with each other.

In the waterproof slide fastener 1 according to the present embodiment, the fastener element 21 having the above configuration is made of a polymer alloy of a polyurethane resin and an ABS resin. The fastener element 21 made of such a polymer alloy can increase the bonding strength with the fastener tape 10 in which the waterproof layer 13 of the polyurethane elastomer is formed by the polyurethane resin being compounded. In addition, since the ABS resin is compounded, the moldability and rigidity of the fastener element 21 can be improved. In addition, the polyurethane resin used for the polymer alloy is a thermoplastic resin, which is different from the polyurethane elastomer of the waterproof layer 13 formed on the fastener tape 10, is harder than the elastomer, and is easily stretched like an elastomer. It is not.

In particular, the fastener element 21 is configured such that the ratio (polyurethane resin / ABS resin) of the polyurethane resin and the ABS resin in the polymer alloy is 20/80 to 50/50 in weight ratio. If the weight ratio of the polyurethane resin is lower than 20%, sufficient fixing strength cannot be obtained between the fastener tapes, or the fastener element 21 is likely to be cracked due to lack of strength, and the engagement strength of the slide fastener 1 is considered. May be lowered. On the other hand, when the weight ratio of ABS resin is lower than 50%, the moldability and rigidity of the fastener element 2l may become inadequate, and there exists a possibility of causing the fall of the engagement strength of the slide fastener 1.

The slide fastener 1 which concerns on this embodiment provided with the above structure can be manufactured by the method generally used conventionally. That is, a metal mold | die which has a cavity of a predetermined shape is prepared, and the fastener tape 10 which coat | covered the polyurethane elastomer by the upper mold | type and the lower mold | type is clamped.

Next, the chips of the polyurethane resin and the chips of the ABS resin are mixed and melted at a predetermined weight, respectively, and the molten resin material is introduced into the mold cavity through the spool, the runner and the gate. In addition, the molten resin introduced into the cavity is symmetrically formed on both surfaces of the upper and lower parts of the fastener element 21 through the through holes 14 of the fastener tape 10 on the front and rear surfaces of the element attachment corners 11. At the same time, the upper half and the lower half are connected by a connecting portion 28 formed in the through hole 14 to be molded integrally. Thereby, the waterproof slide fastener 1 of this embodiment shown in FIGS. 1-3 can be obtained.

In the waterproof slide fastener 1 according to the present embodiment as described above, the fastener tape 10 has good adhesiveness with adherends such as a urethane coat, excellent wear resistance, and good moldability and rigidity of the fastener element. . Further, it is a waterproof slide fastener having a high bonding strength between the fastener tape and the fastener element, the molding is simple, and the tape has excellent flexibility, engagement strength and water tightness.

Hereinafter, an Example is given and this invention is demonstrated further more concretely.

In this example, five types of waterproof slide fasteners having different mixing ratios of the polyurethane resin and the ABS resin in the polymer alloy constituting the fastener element were produced, and the following evaluations were performed for each slide fastener. As five types of waterproof slide fasteners to be evaluated at this time, the ratio of the polyurethane resin / ABS resin in the polymer alloy is 20/80 (first example), 30/70 (second example), Waterproof slide fasteners (polyurethane resin /) which consisted of waterproof slide fasteners which become 50/50 (third example) and 70/30 (fourth example), and ABS resin which does not mix polyurethane resin only ABS resin = 0/100) was produced (Comparative Example).

Next, the five types of waterproof slide fasteners obtained were evaluated for four items of transverse pull strength, push strength, pull strength, and slip strength, respectively. Here, the transverse pulling strength indicates the magnitude of the resistance when the left and right fastener tapes are pulled at a constant speed in a direction opposite to each other while the waterproof slide fastener is engaged. Push-up strength refers to the magnitude of the resistance when the fastener element is pushed in a direction perpendicular to the tape surface with the waterproof slide fastener engaged.

Pulling strength indicates the magnitude of resistance when the fastener tape is fixed in the state of the fastener stringer, and when any of the fastener elements is pulled outward in the tape width direction, and also sliding. The strength indicates the magnitude of the resistance when one fastener element is pulled in the tape length direction. The magnitude of these resistors is the value when the slide fastener is disengaged, the fastener element is broken, or removed from the fastener tape.

In addition, in each said intensity | strength evaluation, 20 measurement samples are prepared about the 1st Example-4th Example, and a comparative example, respectively, and each intensity | strength test is carried out about 5 measurement samples for each evaluation item, These The average of the measured values obtained from five measured samples was calculated, and the strength of each waterproof slide fastener was evaluated. The results obtained by calculating the transverse pull strength, the pull up strength, the pull strength, and the slip strength for each of the waterproof slide fasteners of the first to fourth examples and the comparative example are shown in Figs. In addition, for reference, in the conventional waterproof slide fastener in which a fastener element made of polybutylene terephthalate is injection-molded on a fastener tape coated with Hytrel (registered trademark) on its surface, the lateral pull strength, the pushing strength, The pull strength and slip strength values are also shown in the respective graphs of FIGS. 4 to 7.

As shown in Figs. 4 to 7, the waterproof slide fastener (polyurethane resin / ABS resin = 30/70) of the second embodiment showed the highest value in any one of the strength tests, and the high quality waterproof slide fastener was shown. It was confirmed that it was In addition, in the waterproof slide fastener of the first embodiment, the pull strength was slightly lower in the pull-up strength in the waterproof slide fastener of the third embodiment, but the transverse pull strength, which is important in the slide fastener, is a conventional waterproof slide fastener. The higher value was shown, and it was confirmed that it was the waterproof slide fastener which was excellent in meshing strength and was of high quality.

The waterproof slide fasteners of the fourth embodiment exhibited substantially the same values as the conventional waterproof slide fasteners in terms of the pull strength and the slip strength, but in the transverse pull strength, they were slightly lower than the first to third embodiments. Indicated. On the other hand, the waterproof slide fastener of the comparative example was inferior in the lateral pull strength and pull strength compared with the slide fastener of the 1st Example-4th Example.

Further, as a result of the high frequency welding of the waterproof slide fasteners of the first to fourth embodiments with respect to the urethane-coated adherend, the welding can be performed without any problem.

As described above, the waterproof slide fasteners of the first to fourth embodiments were confirmed that the fastener tape is easily adhered to the polyurethane-based adherend, is flexible, and is excellent in formability and rigidity of the fastener element. In particular, the first to third examples were waterproof slide fasteners having excellent lateral pulling strength, pulling strength and sliding strength, and having good quality. Moreover, in order to investigate the ratio in the weight ratio of the polyurethane resin / ABS resin in the said polymer alloy, there exists a method of using the absorption ratio of an infrared absorption spectrum, for example. This is a measuring method which irradiates a ratio by measuring the absorbed quantity, since an absorption wavelength differs according to the difference of a composition.

The present invention is particularly effective for a waterproof slide fastener that requires good adhesion to a polyurethane-based adherend.

In the waterproof slide fastener according to the present invention, a belt-shaped core material is covered with a waterproof layer made of polyurethane elastomer, and a fastener tape is formed, and the fastener tape includes a plurality of fastener elements made of a polymer alloy of polyurethane resin and ABS resin. Molding is integrated.

MEANS TO SOLVE THE PROBLEM In order to improve adhesiveness with the to-be-adhered substance, such as a urethane coat of the fastener tape coated with a waterproofing layer, compared with the conventional polyester elastomer (for example, Hytrel) which is a material of a waterproofing layer, , Using a polyurethane elastomer was examined. However, when the waterproof layer is formed of polyurethane elastomer, there is a problem in that the adhesiveness of the polybutylene terephthalate agent to the fastener element is lowered as described above. Therefore, as a material of the fastener element, it is not necessary to use conventional polybutylene terephthalate, but to use a new synthetic resin having good phase (affinity) with polyurethane elastomer and excellent adhesiveness. Experiments and reviews were repeated.

First, as a material of the fastener element, consideration was given to using a polyurethane resin alone in consideration of affinity and adhesion to the polyurethane elastomer of the waterproof layer. However, when the fastener element is formed of only polyurethane resin, the adhesiveness with the polyurethane elastomer is improved, but when the fastener element is molded, it takes a long time until the resin cools and solidifies, so that the gate is difficult to break and the moldability is bad. There was a problem. In addition, it is evident that the fastener element formed of the polyurethane resin is very soft and lacks in practicality because it lacks rigidity as an element. In addition to using a polyurethane resin as the material of the fastener element, it is also possible to use ABS resin or polycarbonate resin. However, when these resin materials are used alone, it is difficult to obtain the strength of the element and the chemical resistance is poor. There was this.

Next, in order to solve the above problems when the polyurethane resin is used as the material of the fastener element, as a result of further experiments and examinations on the material, the ABS resin has good compatibility with the polyurethane resin, and the moldability Since it is excellent, it turns out that the use of the polymer alloy of a polyurethane resin and an ABS resin as a material of a fastener element improves the moldability of a fastener element, and improves the rigidity of a fastener element, and completes this invention. Struck.

That is, if the waterproof layer formed on the fastener tape is made of polyurethane elastomer, and the fastener element formed integrally on the fastener tape is a waterproof slide fastener made of a polymer alloy of polyurethane resin and ABS resin, the characteristics of each material can be utilized. The fastener tape has good adhesion to adherends such as a urethane coat, excellent wear resistance, good moldability and rigidity of the fastener element, and high adhesion strength between the fastener tape and the fastener element.

For this reason, since the waterproof slide fastener of this invention is easy to shape | mold, and the surface of a fastener tape is coat | covered with a polyurethane elastomer, it is good in adhesiveness with the to-be-adhered body made of a polyurethane-type synthetic resin, and such a polyurethane type It is particularly suitably applied to the adherend of. In addition, the waterproof slide fastener of the present invention is also excellent in the bending property, wear resistance, engagement strength and water tightness of the tape.

Moreover, in order to further improve the function of a waterproof slide fastener, the ratio of the said polyurethane resin and the said ABS resin in the polymer alloy which comprises a fastener element was also examined. As a result, the waterproof slide fastener of the present invention has a ratio of the polyurethane resin and the ABS resin (polyurethane resin / ABS resin) in a weight ratio of 20/80 to 50/50, whereby the moldability, strength, The rigidity is further improved, and the waterproof slide fastener of high quality which is excellent also in the transverse pull strength of the slide fastener is also provided.

Claims (2)

A plurality of fastener elements 21 along the opposing element attaching edges 11 of the pair of waterproof fastener tapes 10 coated with a waterproof layer 13 of a strip-shaped core material 12 made of a woven fabric, a knitted fabric, or a nonwoven fabric. ) Is a slide fastener having a waterproof structure with a pair of fastener stringers 2 formed by molding integrally and lined with a slider and a slider for engaging and disengaging the fastener elements 21. The waterproof layer 13 is made of a polyurethane elastomer, A waterproof slide fastener, characterized in that the fastener element 21 is made of a polymer alloy of a polyurethane resin and an ABS resin. The waterproof slide fastener according to claim 1, wherein a ratio (polyurethane resin / ABS resin) of the polyurethane resin and the ABS resin in the polymer alloy is in a weight ratio of 20/80 to 50/50.

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