JPS6064842A - Laminate - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention [Technical Field of the Invention] The present invention relates to an improvement in a laminate of a film and a fabric, and more specifically to a laminate of a fabric embedded in a thermoplastic resin and a biaxially stretched film. It's about the body.

[Prior art]

Conventional laminates of film and fabric are known to be laminated and integrated using adhesives that exhibit sufficient adhesion to both.

For example, a sail for sailing or windsurfing.

It is used for tents, bags, covering materials, etc.

However, in order to obtain high adhesion between the film and fabric, such conventional laminates use resin that exhibits high adhesiveness for both the film and fabric to integrate them.
There was a drawback in that the tear strength of the laminate was significantly lower than the tear strength inherent in the fabric, resulting in a tear strength as low as that of a film. Therefore, in order to maintain the tear strength of the laminate, it is necessary to use a fabric with a high grain content using thick denier threads. It was not possible to create a sail with good strength and tear strength.

[Purpose of the invention]

The object of the present invention is to avoid the above-mentioned drawbacks, that is, to have a high adhesive strength between the fabric layer and the biaxially stretched film, to prevent delamination from occurring, to be lightweight, and to have a high tear strength due to the difference in tear strength of the fabric itself. The present invention provides a laminate having a tensile strength in the bias direction as high as that of a biaxially stretched film.

[Structure of the invention]

The present invention comprises a fabric (A) embedded in a thermoplastic resin,
A laminate comprising 2iIi+1+stretched film (B), in which the two are laminated, and the adhesive strength between (A) and (B) is 200 to 6000 g/cm, preferably 300 to 5.
000 g/(2), and the adhesive force between the thermoplastic resin and the fabric (A) is O-120 g/am, preferably 30-1
00 g/an.

The thermoplastic resin in the present invention includes polyolefin, polyester, polyamide, polyester ether, polyurethane, and polyester amide.

Examples include polyether amide, polyphenylene sulfide, polysulfone, polyether sulfone, and polyether ether ketone. Further, even those having a functional group such as a glycidyl ether group that is ring-opened by heat, or a functional group that is ring-closed by heat, such as a glycidyl ether group, can be used as long as they can be melt-extruded. It is also possible to use polyester with a small amount of incyanate added. Heat resistant agent for thermoplastic resin.

A conditioner, an antistatic agent, a coloring agent such as a dye, a pigment, etc. may be dispersed and blended.

The fabric as used in the present invention is composed of a single type, a composite yarn, or a blended yarn of natural fibers and synthetic fibers such as polyester, polypropylene, polyamide, polyacrylonitrile, and polyurethane, and its form is woven fabric 9.
These are knitted fabrics, nonwoven fabrics, and net-like materials. It may also be a mixture of these natural fibers or synthetic fibers.

The fabric may be dyed, softened, etc.

The fabric needs to be open to the extent that it is embedded in the thermoplastic resin, so the weight of the fabric cannot be determined unconditionally depending on the thickness and form of the thread, but it is usually 5 to 500.
g/m2r with a desired weight of 10 to 250 g/m2 is used. The tearing strength of the fabric is preferably 00 g or more, preferably 300 to 100 g, more preferably 600 to 50,000 g, and most preferably 600 to 3,000 g.

The fabric (A) of the present invention refers to a fabric embedded in a thermoplastic resin. Embedding means that the thermoplastic resin wraps the constituent threads through the grain of the fabric.

The embedding method is made by melt-extrusion laminating a thermoplastic resin on the fabric (described later), by dipping it in a thermoplastic resin solution, or by coating it. In the case of the melt extrusion lamination method, the thickness of the thermoplastic resin required for embedding cannot be determined unconditionally as it varies depending on the structure of the fabric;
0μ is preferred. If the embedding of the fabric in the thermoplastic resin is insufficient, bag-like delaminated particles are generated between the thermoplastic resin and the fabric.

In the present invention, the adhesive strength between the thermoplastic resin and the fabric is O~1.
In order to achieve 20 g/cm, either choose a thermoplastic resin that has poor adhesion to the fabric9, for example, a thermoplastic resin that has no adhesion that is different from the raw material resin that forms the fabric, or make it have poor adhesion to the fabric. This is achieved by surface treatment such as coating with resin.

Fabric (A) and BO embedded in thermoplastic resin
Adhesive force with film (B) is 200 to 6000 g/an
To achieve this, select a combination of the same type of thermoplastic resin as the BO film (B) or a different type of thermoplastic resin with high adhesiveness, or
This can be achieved by treating the film to make it more adhesive.

The biaxially stretched film (B) of the present invention may be one that has been stretched in two directions, vertically and horizontally. It is manufactured after being subjected to post-heat treatment if necessary. Examples of biaxially stretched films (hereinafter abbreviated as BO films) include:
Examples include polyester, polyolefin, polyamide, and the like. For example, polyester etherm is polyethylene terephthalate (hereinafter abbreviated as PET).

These include biaxially stretched films made of polyethylene naphthalate, polybutylene terephthalate, copolymers thereof, and the like. Polyolefin BO films include homopolymers and copolymers mainly composed of ethylene or propylene.

This is a 130 film made of a graft material or a blend material.

As polyamide BO film, nylon 6゜12,
11, 66.610 and copolymers and blends thereof.

The surface of the BO film that is bonded to the fabric (A) may be subjected to discharge treatment or primer treatment. Additives such as a heat resistant agent 9, a coloring agent, and an antistatic agent may be dispersed. The thickness of the BO film is 10-500μ, preferably 15-250μ. The tear strength of BO film is significantly lower than that of fabric, with a value of 3 to 100 g (per 25 μm thickness).

(value measured by light load method), preferably 4 to 50 g. The BO film used has a tensile strength in the cross direction of 10 to 50 kg/m [112], preferably 13 to 30 kg/mm2.

The tearing strength of the fabric used in the present invention is pg, and the tensile strength in the bias direction of the biaxially stretched film is Qkg/InIn.
When set to 2, p/Q=6-1000. Preferably 10
~685. Particularly preferably, 10 to 230 combinations are used.

Examples of specific combinations are described below.

For example, when a polypropylene BO film is used and a polyester fabric is used as the fabric.

They are monopolymers and binary-ternary copolymers selected from 02 to C1o alkenes and alkadienes, and have a melt index (ASTM] '1238) (hereinafter abbreviated as IAI) of 01 to 200. Good luck 1~
100. More preferably, a number of 5 to 50 is used. Particularly preferred examples are polypropylene homopolymers having an M of 5 to 50, ethylene/s:propylene copolymers, ethylene and propylene butenterpolymers, ethylene/propylene rubbers, and blends thereof.

Further, when a stretched polyester film is used as the BO film and a polypropylene fabric is used as the fabric, examples of the thermoplastic resin include copolymerized polyester, polyester ether, and polyurethane.

A particularly preferred example is a thermoplastic resin whose main component is copolymerized polyester.

When the laminate of the present invention is used for yachting or windsurfing sails, the fabric is made from polyester or polypropylene.

Thermoplastic resins include polypropylene, polyethylene,
Polyester (
In particular, a combination of PET) and polypropylene BO films is preferred.

The laminated structure of the present invention is characterized in that at least a fabric (A) wrapped in a thermoplastic resin and a BO film (B) are laminated.
)/i)/(B)] or C(A)/(B)/
It is also possible to have the structure (A) ], and furthermore, it may be multi-layered.

Further, in the present invention, a laminate in which a thermoplastic resin embeds a fabric and is laminated on a film.

Adhesive force between (A) and (B) is 200-6000 g/c
m, preferably from 600 to 5000 g/an, and the adhesive strength between the thermoplastic resin and the fabric is from 0 to 120 g/cm, preferably from 30 to 100 g/cm.

If the thermoplastic resin does not embed the fabric, the fabric will easily fall off from the laminate. If the adhesive strength between the thermoplastic resin and the fabric exceeds 120 g/an, the tear strength of the laminate cannot be maintained at the same level as the tear strength of the fabric alone.

The adhesive strength between Sunda BO film (B) and fabric (A) is 20
If it is less than 0 g, /a++, delamination will occur during use.

Thickness ratio (A) of the fabric (A) of the present invention and the BO film (B)
)/(B) is 01 if the configuration is (A)/(B)
~200. Preferably 0.4 to 70, (A)/(B
)/(A) is 02-400, preferably 08-1
3 s, 0.0 for (B)/(A)/'CB)
5-100. Preferably, it is desirable that it is 02 to 5.

[Manufacturing method]

Next, an example of the method for manufacturing the laminate of the present invention will be described.

The thermoplastic resin used in the present invention is used to embed a fabric and laminate it onto a BO film by coating, melt extrusion lamination, or the like described below. However, it is not limited to these manufacturing methods.

(Feed the IIBO film and fabric in a stacked state to a melt-extrusion laminator, laminate the melt-extruded thermoplastic resin from the fabric side, and embed the fabric in the thermoplastic resin [Fabric (A) / BO film] (B)] is obtained.

(2) The BO film was fed from one side of the melt-extrusion laminator, the fabric was fed from the other side, and the BO film was melt-extruded and integrated via the thermoplastic resin [fabric/thermoplastic resin/B
O film] was obtained (this will be referred to as a laminate (0)). Next, a thermoplastic resin was melt-extruded and laminated again onto the fabric surface of this laminate (C) [Fabric (A)/BO
A laminate of film (B)] is obtained.

When the resin to be melt-extruded in the method of [11, +21] is pressed against the fabric, the temperature of the resin is desirably below the melting point of the fabric. If the fabric is pressed at a temperature exceeding the melting point of the fabric, the fabric will not be able to maintain its original shape and strength, resulting in a decrease in tear strength. Further, in the method (2), it is desirable that the temperature of the resin melted and extruded onto the fabric surface of the laminate (C) at the time of pressure bonding is higher than the melting point of the resin already laminated. If pressure bonding is performed below the melting point, the thermoplastic resin layer will not be integrated and delamination will occur.

However, the embedding of fabric in thermoplastic resin is still molten GL+141.
It is necessary to be sufficiently crimped at the time of exit. If the pressure bonding is insufficient, the thermoplastic resin layer will not adhere to the BO film because the resin will not pass through the grains of the fabric and embed the fabric sufficiently, or the thermoplastic resin layer will not be integrated with the already bonded resin layer, resulting in delamination. -John happens. The pressure required for crimping is a linear pressure of 2 to 20 kg/cfrl, preferably 5 to 1
5 kg/cIT+. In order to adjust the adhesion strength as required, the adhesive may be further passed through hot pressure or 10-hole.

The fabric used in the laminate of the present invention is antistatically treated.

Known treatments for fabrics, such as water repellent treatment and anti-wrinkle treatment, can be applied. There is also a pattern 9 on the fabric side and film side.
By printing or pasting letters, etc., it is possible to add interest and increase fashionability.

[Effects/effects of the invention]

The present invention is a fabric (A) in which a fabric is embedded with a thermoplastic resin.
The laminate obtained by laminating with BO film (B) has low adhesion to fabric (and by using a thermoplastic resin with high adhesion to BO film, it has the following excellent effects. be.

(a) Delamination between the fabric (A) and the BO film (B) occurs easily, and the fabric has an excellent tear strength comparable to the tear strength of the fabric itself.

(r+) A laminate with low basis weight and high tear strength can be obtained.

The laminate of the present invention can be used, for example, in under-eave tents and yachts.

It is used for windsurfing sales.

In particular, it is lightweight, has high tear strength, and is resistant to delamination, so it is preferable to use it for sails.

[Method of measuring characteristics, evaluation criteria]

In addition, the measuring method and evaluation criteria of the characteristics in the present invention are as follows.

+ Sample a test piece from the adhesion laminate of IIBO film and fabric (A), make a peeling opening between the BO film and fabric (A) for the gripping margin, and put it in a Tensilon type tensile tester. It was measured with

Separation angle: 90 Tensile speed: 20 mm/min Measure 10 samples each in the vertical and horizontal directions, and take the average value.

(2) Adhesion between fabric and thermoplastic resin A test piece was sampled from the laminate, a peeling opening was made between the thermoplastic resin and the fabric to cover the gripping margin, and the above (
Measurement was carried out under the same conditions as 1). If separation occurs in the warp direction, read the stress at which the weft and thermoplastic resin separate.

When peeling occurred in the weft direction, the stress at which the warp and thermoplastic resin peeled was taken as the stress. Ten samples each were measured in the vertical and horizontal directions, and the average value is shown.

(3) Width 63 +nn from laminate according to Tear Strength J Engineering SP 8116
＋.

A test piece with a length of 76 rrm is made, a 20 mm cut is made in the center, and the test piece is measured using a Mendorff tear tester (heavy load method). The lower value of the measured values in the warp and weft directions was taken as the tear strength.

〔Example〕

Hereinafter, embodiments of the present invention will be described based on Examples.

Example 1 Polypropylene ml as thermoplastic resin [η] = 1.45, measured in tetralin at 135° C., ■.

97, section 5], the constituent threads of the fabric are PET (25℃).

0-Intrinsic viscosity measured in chlorophenol IV = o
, 68) shown in Table 1 (tearing strength of the fabric itself: 600 g) was used. As B○ film (B), polypropylene BO film 1 [[η]=2.25.
:t, ■, 97.3% polypropylene 5 times vertically
Thickness 5 made by sequentially biaxially stretching 8 times horizontally and then heat setting.
0μ film, tensile strength in bias direction 17 kg
/mm2. Tear strength: 10 g/25 μm] was used.

Polypropylene 8α1 was fed into an extruder with a diameter of 65 mm, and melt-extruded from a T-die with a width of 1000+ nm to a thickness of 40 μ at an extrusion temperature of 320°C to form a laminate of [fabric/thermoplastic resin/BO film (B)]. C) was obtained.

Next, polypropylene Nα1 was again melt-extruded laminated to a thickness of 40 μm on the fabric side of this laminate (C), and the fabric was embedded in polypropylene [fabric (A)/BO film (
B)] was obtained. Table 1 shows the evaluation results of this laminate.

This laminate is prone to delamination.

The tearing strength was almost as good as that of the fabric alone.

Comparative Example 1 [Fabric/Thermoplastic resin/BO film (B) of Example 1]
] layered product (C) on the fabric side again with polypropylene N [L
1 was used as is without melt extrusion lamination.

The material was thermocompressed through a pressure roll at 170°C and a linear pressure of 10 kg/an [fabric/thermoplastic resin/BO film (
B)] laminate was obtained. As shown in Table 1, this laminate was not usable because the fabric was not embedded in the thermoplastic resin, so it easily fell off from the laminate.

Comparative Example 2 Using the same fabric as in Example 1, BO film (B) was used to prepare polyethylene terephthalate BO film Nf11 [
: Intrinsic viscosity measured in 25°C O-chlorophenol:
A BO film with a thickness of 50μ, which was sequentially biaxially stretched 65 times vertically x 6°5 times horizontally and heat-set PET of tv-0.66,
Tensile strength in bias direction 22 guns/dish 2. Tear strength 2
0g/per 25μ] Copolyester N111 [terephthalic acid/infucuric acid/adipic acid (
A polycondensate of copolymerized Molchie 69/9/22) and ethylene glycol/butanediol (copolymerized mol% -40/60).

N1 point 1430, density 1.29 g/an3. Molecular weight 2
50001 was used.

Copolyester N111 was prepared in the same manner as in Example 1.

Solvent layer (extrusion lamination) at 240c [Fabric (A)
/BO film (B)] was obtained. Table 1 shows the evaluation results of this laminate. Since copolyester Na1 was used, the adhesive strength between the fabric and copolyester 11111 exceeded 100 g/an, which was outside the scope of the present invention. This laminate had very low tear strength and was easily torn and could not be used practically.

Example 2 Polypropylene molded net [°'con 7 x
"TS" OV 7100 (manufactured by Showa Denko (Q)), a net made by directly extruding polypropylene by melt extrusion and then sequentially biaxially stretching, the characteristic values are shown in Table 1.
Shown below. Tear strength of net alone: 570 g], copolyester N111 used in Comparative Example 2 as thermoplastic resin
．． PET-BO used in Comparative Example 2 as BO film
A film was used. In the same manner as in Example 1, 2
Copolyester Ugly 1 was extruded to a thickness of 40μ at 40°C, and the fabric was further extruded in the same manner to form copolyester Nα.
Embedded in 1, [fabric (A) / BO film (B)
] laminate! It's T. Next [Fabric (A) / B
To increase the adhesive strength between the O film (B), add 1 additional layer.
It was passed through a thermocompression roll at 50°C and a linear pressure of 8 kg/an. Table 1 shows the evaluation results of this laminate. This laminate was excellent in that delamination did not occur and the tear strength maintained the tear strength (550 g) of the fabric itself before lamination.

Example 6 The same fabric as in Example 2 was used, and the thermoplastic resin was made of ethylene-butene copolymer 1 (containing 7 moles of butene).

MId/10 minutes), and the polypropylene BO film No. 1 used in Example 1 was used as the film (B). Ethylene-butene copolymer Na 1 at 280℃ to a thickness of 50μ
A laminate of melt-extruded laminate and toshi [fabric/thermoplastic resin/film (B)] was obtained. Next, the ethylene-butene copolymer was laminated again by melt extrusion on the fabric side of this laminate to obtain a laminate of [fabric (A)/BO film (B)]. Table 1 shows the evaluation results of this laminate. This laminate had tear strength comparable to that of the original fabric and was excellent in that terramination was less likely to occur.

Comparative Example 6 The same fabric and BO film as in Example 6 were used except that the thermoplastic resin was changed to the polypropylene used in Example 1. In the same manner as in Example 1 using a melt extrusion laminator [
A laminate of fabric (A)/film (B) was obtained. Table 1 shows the evaluation results of this laminate.

In this laminate, part of the fabric melted and became integrated with the thermoplastic resin during melt extrusion lamination, and when it was cut, the fabric/thermoplastic resin could not be separated. Furthermore, the tearing strength of this laminate was extremely low compared to the tearing strength of the fabric before lamination.

Example 4 Polyester knitted fabric (PE v068) was used as the fabric.
The configuration is shown in Table 1. A laminate of [fabric (A)/BO film (B)] was obtained in the same manner as in Example 1, except that the thermoplastic resin had a tear strength of 960 g) and the thickness of the thermoplastic resin was changed to 60 μm. Table 1 shows the evaluation results of this laminate.
It was shown to.

This laminate exhibits the tearing strength of a single fabric.

It had excellent tearability and was resistant to delamination.

Example 5 Using the same fabric, thermoplastic resin, and BO film as in Example 1, a laminate of [fabric (A)/BO film (B)] was obtained in the same manner as in Example 1.

Next, the thermoplastic resin is melt-extruded again on the BO film (B) side of this laminate, and the fabric is supplied from the opposite side and laminated to form a lamination of [fabric (A)/film (B)]/thermoplastic resin/fabric]. I got a body. Furthermore, a thermoplastic resin is melt-extruded and laminated onto the fabric side of this laminate to form a BO film (
B) has fabric (A) on both sides [fabric (A)/B
A laminate of O film (B)/fabric (A)] was obtained. The tearing strength of this laminate was higher than the tearing strength of the two fabrics themselves before lamination, and delamination and stiffness were less likely to occur.

Procedural amendment 1. Display of the case 1982 Patent Application No. 174000 2 Name of the invention Laminated body 3 N111 Relationship to the case Patent applicant address 2-2-4 Nihonbashi Tocho, Chuo-ku, Tokyo, Order for amendment Day (=1 Sponsorship 5, No number of inventions increased by amendment 6, "Detailed explanation of defense" column 7 of the specification to be amended, Contents of amendment (1) Mei Ill., page 4, line 16 r50000J Correct it as r5000J.

(2) Same page 17, line 17 Correct rl 00J to rl 20J.

Claims (1)

[Claims] A laminate comprising a fabric (A) embedded in a thermoplastic resin and a biaxially stretched film CB), in which the two are laminated, and the adhesive strength between (A) and (B) is 200 to 6000 g.
7 cm, and the adhesive strength between the thermoplastic resin and the fabric is 0-
A laminate having a weight of 120 g/an.