JPS5922979A - Hot-melt adhesive coated yarn - Google Patents

Abstract

PURPOSE:To provide the titled coated yarn capable of bonding easily with heat, having excellent adhesive strength, and effective also for the reinforcing of the adherend, by applying an ethylenevinyl acetate copolymer resin layer to the circumference of a core yarn at a specific ratio. CONSTITUTION:The hot-melt adhesive coated yarn 3 having a fineness of preferably 400-6,000 denier is prepared by applying an ethylenevinyl acetate copolymer resin layer 2 having a vinyl acetate content of preferably 5-50wt% to the outer circumference of the core yarn 1 (e.g. monofilament or multi-filament of polyester, nylon, etc. having a fineness of 100-2,500 denier). The amounts of the core yarn and the ethylene-vinyl acetate copolymer resin are 10-50wt% and 90-50wt%, respectively. USE:Manufacture of tough film by bonding synthetic resin films with each other. The sealing, bonding, etc. of container, bag, etc.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is directed to the treatment of highly light-enclosed molded products such as films and sheets of vinyl chloride resin, polyethylene resin, etc.
A special %+5 that is convenient for . Regarding the filament-like adhesive material having a layer of 5. Adhesive needles should be treated with sutures.

-For example, heat -1'J' k4! ], 'l・hand [ξ
If you want to combine the bag body, which is made from a sheet bag with the name of January, and the prize ticket, the lid of the temporary packaging container, and the photo object, etc. The method of applying an adhesive is usually carried out by applying an adhesive or by heating the bonding part of the synthetic resin molded body to heat-seal it.0 Method of applying an adhesive However, there are environmental hygiene issues such as evaporation of the solvent in the adhesive, the need to apply the adhesive only to the local area to be bonded, which is a surprisingly troublesome process, and the fact that heat fusion This method requires expensive special equipment that must heat the bonded portion to a high temperature that softens and melts it.

The present invention does not require such adhesives or expensive equipment, can be thermally bonded to the front, has excellent adhesive strength, and is applicable to, for example, bags made of synthetic resin moldings. , the strength I of the bag sheet adhered body due to the strength of the heat-adhesive yarn itself
As a result of intensive research on the W 7a material, which also has a strength reinforcing effect that strengthens W, we have completed the thermally adhesive covering material of the present invention, which is a thread-like adhesive.

That is, the present invention provides a yarn to be loosened in which ethylene-vinyl acetate 11E combined resin waste is provided on the outer periphery of a core yarn, and the core yarn and the ethylene-vinyl acetate γ-vinyl combined type 1. 1 fat layer weight ratio is 10 to 50% by weight of core yarn, ethylene-1
1 mij! The present invention provides a heat-adhesive coated yarn characterized in that it contains 90 to 50 percent vinyl-coated resin.

The heat-adhesive coated yarn of the present invention described above can be used in a wide range of fields as a thread-like adhesive for synthetic resin molded articles. Layered with the bound yarn to make a stronger hilhelm body: sealing and adhesion of containers, shells, etc.; 纺υ1j
Before sealing the container and lid of the JA easy-to-open packaging container:
When used for sealing the container and the lid of a JA1*q easy-to-pack container, the core of the heat 1 single thread - 4j yarn of the present invention has a strong core thread. , and an IA comonomer system +uJ having a contact property of 71'J with the core thread and the appropriate IW.
II'+r Since the outer periphery of the outer circumferential layer is strongly adhered to the outer peripheral layer and the resin molded body, when only the core thread is pulled, the core Only the thread comes off, so the lid can be easily opened by pulling the core thread; Used as a part of the fabric or non-woven fabric, and overlapped with other shoulder fabric that is to be the outer material. Applications include adhesion of outer material and interlining.

The core yarn used in the present invention can be any yarn that can be coated with ethylene-vinegar (vinyl copolymer resin) (hereinafter rEVA may be abbreviated as fat), which will be described later. Examples of these include monofilaments, multifilaments, and twisted threads such as polyester, nylon, rayon, polypropylene, polyethylene, and acrylic. The thickness should preferably be 100 to 2,500 denier, and preferably 150 to 1,900 denier from the viewpoint of the strength of the core yarn.

The above-mentioned ethylene-vinyl acetate conjugate resin has a vinyl acetate content (hereinafter sometimes abbreviated as rVACJ).
5-6O Fudesha%, from the viewpoint of thermal adhesion with the synthetic resin molded body and moderate adhesion with the core yarn, etc., it is suitable for shrimp. Preferably 15-5
0% by weight of No. VA resin is used.

The above EVA resins include high pressure ↓, 1L polymerization method,
Bath liquids manufactured by legal methods, emulsion military methods, etc. can be used, such as Evaflex P-1907 (V
A (,197,: amount%), P-2505 (VAC, 25
'J amount%), P-330-7 (30% by weight), Soabrene BH (VAC, 55% by weight), specially made by Nippon Gosei Chemical Industry Co., Ltd.
), CM (VA (60% by weight), Bayer Rebab V7450P, 45ON (VAC, 45% by weight), Toyo Soda Lutracene, Sumitomo Chemical (1) Evatate, Mitsubishi Yukabo Examples include Yucalon Eva, etc., and these can be used alone or in combination.
EVAI
2 parts of propylene pine resin, etc. per 100 parts of TI fat
It can also be used by blending in an appropriate amount of 01 (or less, preferably 10 j['4.8+S or less).

The weight ratio of the core yarn and the EVA resin layer constituting the heat-adhesive covered yarn of the present invention is 10 to 50% by weight for the core yarn and 90 to 50% by weight for the EVA resin layer.

Preferably, the core yarn has a content of 15 to 3 OZ, and the EVA resin layer has a content of 8%.
It is preferably 5 to 70% by weight. The core yarn is 10% by weight in this weight ratio.
If it is less than that, it becomes difficult to obtain the expected reinforcing strength, which is not preferable. In addition, if the core yarn exceeds 50M%, the synthetic
This is undesirable as it tends to reduce the adhesive strength with the JJ resin molded body.In addition, if the amount of the core yarn is less than 10% in terms of the weight ratio between the core yarn and the E V A 4ftJ resin layer, the core Adhesion between the yarn and the EVA resin layer deteriorates, and if the core yarn exceeds 50% by weight, a heat-adhesive covered yarn with a uniform thickness tends to be obtained, which is undesirable.

The thickness of the heat-adhesive coated yarn of the present invention is appropriately determined depending on the purpose, but a thickness of 400 to 6000 denier is preferable as a filament adhesive.

As for the shape of the covered thread, examples include polygonal shapes such as circular, oval, triangular, square, and rectangular, and can be selected as appropriate depending on the purpose of use. As for the shape, circular or oval shapes are preferable.

In addition, as a method for producing the thermally welded and gradually decayable yarn of the present invention, for example, an extruder equipped with a two-structure nozzle die with a guide hole for the core yarn is used, and the core yarn is double-layered in advance. Pass it through the core thread guide hole of the structural nozzle die, then adjust the cylinder temperature FW,
C+ 140℃.

C2160℃, C3180℃, die temperature 1.80℃
.

At a nozzle temperature of 190℃, while pulling the core yarn with a collection roller,
The two forces were created through the outer cylinder of the nozzle die,
It can be a thermally sacrificial wandering yarn provided with a III layer.

Below, we will review the present invention with actual rain examples and comparative examples.
'I congratulate you.

The test method consists of the following nine lines.

[I] Adhesive strength (peel strength) test method (1) Single-sided adhesive strength A coated yarn with a length of 200mm and a width of 20mm and a length of 200++n
Set in the center of a polyethylene film with a thickness of 0.1 + rm along the length direction I/C, and heat the piece with a heat sealer at a pressure of 3 kII-1 at a heating temperature of 120°C and a heating time of 1 second. I created a piece.

In this test, the hulled yarn and the film were peeled off from one end in the longitudinal direction of the test piece for about 10 cm (length of the bonded part 190 mm).
, set both ends of this peeled one in the first tool of Tensilon tensile tester [manufactured by Shimadzu Corporation], and pull
The ridge line and the film are pulled at a speed of 200 threshold/mrn, and the tension #fish curve is drawn on a graph for 1 t'fl#, and the average value of each apex of the wavy part (1/line) is calculated.
I asked for

The test piece 3011611 was used again.

(2) Double-sided polyethylene film of 1 and 2 sheets with 1] 10 pieces, 50 pieces in length, and 0.1 in thickness, 50 pieces in length at the center along the 1] direction.
The first day of m+) 7 threads were inserted and set, heated with a heat sealer at 3 k, Q, and heated γ11 [120° C., 7′ I5 bonded in 2 seconds during heating to create a test piece.

For the sample sample, set each of the two films at one end in the length direction in the grip of a Tensilon tester, and
When a sheet of film is peeled off by tension, it is pulled ((glance +
Measure t(!rf!/cnon).

[■] Sting (1 insect) W 1) Kari 4 Kagami thread's strong j Hi Tenshiron pull blur!・In the 4 machines, ・Set the wave-shaped thread in the gripping tool, and check the pulling percentage when cutting by tension.rjm (1 thread)
f 1llllll fixed. In addition, the covering (the strength of the thread is measured at 7
A book was used and expressed as the average mj.

2) Thermal captivity/f skin length: 10mm width, -: running 100nm, depth 0.1m
A test piece was created by attaching a covering thread of 100 mm length to the center along the length of the polyethylene film, and thermally bonding it with a heat sealer at a pressure of 3 kfI-1 at a heating temperature of 120°C and a heating time of 2 seconds. did.

Using a Tensilon tester, this test piece was pulled at a tensile speed of 200 ways'-' with a grip interval of 50wn, and the tensile load M (li'/cin) was measured at the time of tensile cutting.
) was measured. (Considering -: +iJ10wn, length 10
Tensile strength of a polyethylene film with a thickness of 0aa and a thickness of 0.1zm (d980Q is 7cm) Qll) Adhesion between the core yarn and the covering layer Circumferential direction at a point approximately 10 degrees from the end of the covering yarn I made a cut in the hole, and after making a cut and returning the cut to about ζ10 lugs, I wrote a song that praised the condition of the cut, that is, the dense layeredness.

[IV] Uniformity of coating The cod was evaluated by hand and visual inspection. A total of one song, [lII] and [■], was based on the following criteria.

'Eel...◎；艮...○；Defective...×Example 3 with a double counterfeit nozzle die that has a guide hole for the core yarn
Using 0rmnφ extrusion 4vQ once again, pass the 21° denyl nylon monofilament core yarn through the core yarn guide hole of the two wheel + N nozzle die in advance, and extrude while pulling the core yarn with a take-up roller at a tension speed of 3 m7 minutes. The spinning conditions of the machine were cylinder temperature C + 140°C.

C2160℃, C3180℃, die warm 180℃.

Set the nozzle temperature to 205℃ and apply 'EVA・@fat (product name,
Evaflex P-0803, VAC 8%, Mitsui Polychemical Co., Ltd.
The covered thread was passed through a take-up roll and wound onto a bobbin. The denier of the resulting broken yarn of the present invention is 1940 denier, which is the same as the core yarn and E.
The V A ht+fat layer thickness ratio was 1.1789.

The adhesive strength, tensile strength, adhesion, and uniformity of the coated yarn were measured. These results are also shown in Table 1.

Example 2 In the same manner as in Example 1, as shown in Table 1, 840 denier nylon multifilament, EVA resin VAC4
Using 5%, a coated yarn of the present invention having a weight ratio of 15A5 between the core yarn and the EVA resin layer and a thickness of 5600 denier was obtained.

Table 1 shows the results of measuring the performance of the covered yarn.

Examples 3 and 4 In the same manner as in Example 1 as shown in Table 1: polyester multifin membrane), 1000 denyl and 250 denyl; coated with EVA resin layers of VAC, 19% and 28%; 3000 denyl and and 555 denyl; 1 quantitative ratio,
33/67 and 45155: test lights of the present invention were obtained. Table 1 shows Fj: ¥: which measured the performance of the covered yarn.

Comparative Examples 1 and 2 Covered yarns shown in Table 1 were obtained in the same manner as in Example 4. The results of measuring the performance of the Q4 yarn are shown in the first column.

[Brief explanation of drawings]

Figures 1 to 5 schematically show examples of the cross-sectional shape of the heat-bondable yarn of the present invention. Fig. 2 shows a case in which the core thread is a monofilament and the cross section of the square thread is square; Fig. 3 shows a case in which the core thread is a string-like multifilament thread and the cross section of the covering thread is elliptical. Fig. 4 shows a case where the core yarn is a twisted multifilament yarn and the thread to be shuttled is circular; Fig. 5 shows a case where the core yarn is a string-like multifilament yarn and the 4145 yarn is circular. 1 υ pieces are rectangular;
・・1 person for patent for heat-adjustable yarns Nippon Carbide Industries Co., Ltd. Figure 1 Figure 3 Figure 2 Figure 4 Figure 5

Claims (1)

[Claims] 1) A coated yarn in which an ethylene-1-vinyl co-adhesive abrasive layer is provided on the outer periphery of the core yarn, and the core yarn and the ethylene-vinyl co-adhesive abrasive layer have a 1τ - Longitudinal ratio: core thread 10-50%-14i-, %, ethylene-fiber-vinyl co-patterned hybrid system 1i:? 90 to 50 weight to the 1st cavity J5 +, + thread.