JPS5920652A - Fiber laminated sheet, tear strength thereof is improved - 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 The present invention relates to a fiber laminated sheet with improved tear strength.

Conventionally, synthetic resin such as polyvinyl chloride or synthetic rubber,
For example, a laminated sheet coated with polyurethane, such as a waterproof sheet, is known. Such synthetic fiber laminated sheets are widely used for truck hoods, tent fabrics, and the like.

In this case, a woven fabric made of synthetic fiber filament yarn is generally used as the base fabric. However, if the base fabric is thin (lightweight), the tensile strength of the resulting laminated sheet becomes unsatisfactory. The resulting laminated sheet has problems such as unsatisfactory tear strength and a tendency to crack. Furthermore, if the base fabric is thick, the resulting laminated sheet will be excessively heavy, making it inconvenient to handle, and its tear strength will be poor! ! The problem is that it is not expensive.

Furthermore, the surface of the thick base fabric has large irregularities, and in order to smooth it, a large amount of synthetic resin or synthetic rubber must be used for coating, which has the disadvantage of increasing manufacturing costs. Another drawback is that the weight of the resulting laminated sheet increases and its tear strength decreases.

In view of the above-mentioned current situation, it was considered almost impossible to simultaneously satisfy the requirements of reducing the weight of a laminated sheet, improving its tensile elasticity, and improving its tear strength. However, in recent years, efforts have been made to reduce the weight of laminated sheets such as waterproof sheets while maintaining satisfactory tensile and tear strength.
There has been a strong demand for thinner fabrics, and achieving that demand has become an extremely important issue for this industry.

As one way to respond to the above requests,
There has been no attempt to increase the tearing strength of the sheet by weaving large diameter threads into the fabric, but when the tearing phenomenon begins and accelerates, the large diameter threads The tear progresses in an impactful manner, and the trench can be expected to have the effect of preventing the sheet from being cut due to tearing. This had drawbacks such as the top of the covering being cut, which inhibited the waterproofing effect.

Generally, it is known that the resistance of a clean layer sheet to key tearing corresponds to its tear strength. Therefore,
In order to increase the resistance of a fiber laminated sheet to key tearing, it is necessary to improve its tear strength.

An object of the present invention is to provide a fiber laminated sheet with excellent tear strength.

The above objects are achieved by the present invention. m of the present invention
m. The laminated sheet is formed on at least one surface of a base fabric such as a fabric made of yarns made of aromatic polyamide fibers and yarns made of different types of fibers, and and a coating layer made of synthetic resin or synthetic rubber, the warp and/or weft of the base fabric having a blending ratio of 1 to 40%, and/or 2.54 on (F)
1 to 8 of the aromatic polyamide fiber yarns and the remainder of the dissimilar fiber yarns, and the aromatic polyamide fiber yarn has a breaking strength of 15 f/d or more, and/or the breaking strength of the dissimilar fiber yarn is twice or more, and each of the aromatic polyamide fiber yarns is
The threads are inserted between the different mMdFJf threads at intervals from each other in groups of 2 to 5 threads that are parallel to each other.

The vL layer sheet of the present invention is made of aromatic polyamide fiber yarns and single type fiber yarns, and is composed of aromatic polyamide fiber yarns and type 1 type fiber yarns. Even if the breaking strength of the aromatic polyamide fiber yarn is not particularly high, if the breaking strength of the aromatic polyamide fiber yarn is 15 r/d or more, or twice or more of the Ji! type delicate fiber yarn, it is not specified in the present invention. By arranging aromatic polyamide fiber threads and different types of U and fiber moxibustion, the resulting laminated sheet can exhibit extremely high tear strength.

At this time, the V and usage rate of the aromatic polyamide fiber yarns are 1 to 4.
0% and/or straddle, 1 to 8 per 2.54 cm
If controlled properly, a laminated sheet with practically satisfactory tear strength can be obtained.

As described above, in the at layer sheet of the present invention, the red and/or cotton of the base fabric is composed of a small amount of aromatic polyamide fiber yarn and a different type of fiber yarn as a main component.

The aromatic polyamide fiber yarn has a fiber density of 15 f/d or more, generally 15 to 30 f/d, and in some cases about 40 f/d.
have a high breaking strength reaching d, or have a breaking strength more than twice that of a different type of fiber,
As long as this requirement is met, the fineness of the aromatic polyamide fiber yarn that can be used in the present invention is not particularly limited, but is generally 100 to 1510. The yarn preferably has a fineness of 1 to 15 deniers, and the yarn may be any of spun yarn, monofilament yarn, multifilament yarn, and tape yarn, but generally the single fiber fineness is preferably 1 to 15 deniers. 1.5-5
Preferably, it is a multifilament yarn consisting of denier filaments.

The aromatic polyamide that makes up the aromatic polyamide fiber is
At least 70 mol% of the following formulas (1) and (■): +
Art C0NH+ (1) and 4-Arl-CONH-Ar2- N)ICo+
(II) [However, Ar1 and Arl represent a divalent aromatic group, and these may be the same or have different formulas. ] Preferably, the main repeating group is at least one selected from the following repeating groups. At this time, the above formula (1
) and (II), the 92-valent aromatic group represented by Ar1 and Ar2 is: and [where A is -09-8, So 1 801-*-C
o+, -CH,+, or -c(cH,5)z-] is preferably selected from the group of aromatic residues represented by the following.

Further, the aromatic polyamide may contain 30 mol % or less of one or more types selected from divalent aromatic residues having the following formula: as a subcomponent. These subcomponents (c), halogen, alkyl group, nitro group, etc. Although there are no particular restrictions on the basis weight and texture of the base fabric used in the laminated sheet of the present invention, they generally range from 30 to 30 (1/m"). Fabrics having a basis weight, a warp density of 5 to 150 threads/2.546 crn, and a weft density of 5 to 150 threads/2.54 crn, particularly plain woven textiles, are preferred.

There are no particular limitations on the different types of fiber threads used as the main component of the base fabric, but they may include natural fibers (e.g., cotton, linen, etc.) and synthetic fibers (e.g., polyamide, polyester, water-insoluble polyvinyl alcohol fibers, etc.). It is preferable that the fiber is made of at least one type of fiber selected from the group.

The breaking strength of the dissimilar fiber yarn is generally less than 15 r/d and/or the breaking strength of the aromatic polyamide fiber yarn.
Naturally, it has a breaking strength of less than

When the breaking strength of the aromatic polyamide fiber yarn is less than 15 Y/ and/or less than twice the breaking strength of the different type of fiber yarn, the tear strength of the resulting laminated sheet is considered to be unsatisfactory. exist. K is used in the base fabric to obtain a laminated sheet with high heat resistance! Aromatic polyamide fibers (e.g. Nomex, Conex
) may be used. Different types of fiber threads are
It may be spun yarn, monofilament yarn, multifilament yarn, or tape yarn, but generally it is a multifilament with a total fineness of 150 to 1500 denier, consisting of filaments with a single fiber fineness of 1 to 15 denier. Preferably, the thickness of the different type of fiber yarn and the thickness of the aromatic polyamide fiber yarn mixed therein are preferably equal to
This makes it possible to obtain a laminated sheet with a flat surface.

The aromatic polyamide fiber threads are inserted between different types of fiber threads one by one or in groups of 2 to 150 adjacently arranged fibers at intervals.

At this time, the mixing rate is 1 to 40%, preferably 5 to 20%, or 1 to 8 pieces per 2.54 cnr, preferably 1 to 5 pieces,
K LIMITED. When the blending ratio of aromatic polyamide fiber yarns is less than 1%, or when it is less than 1 yarn per 2.54 cIn, the tear strength of the resulting laminated sheet will be unsatisfactory. Furthermore, when the blending ratio of aromatic polyamide fiber yarns exceeds 40% or exceeds 98 fibers per 2.54 m, the processability of the resulting laminated sheet may become unsatisfactory. In particular, when the different types of fiber yarns have a small total fineness (e.g. 100 to 250 deniers), the mixing ratio of aromatic polyamide fiber yarns may be 1% or more;
0 denier), the blending ratio of aromatic polyamide fiber yarns is preferably 50% or more. Further, each yarn may be a single yarn, or may be a twisted yarn of two or more single yarns, or may be a drawn yarn. Furthermore, each single yarn may be a non-twisted yarn or a twisted yarn.

The aromatic polyamide fiber threads may be twisted together with different nine fiber threads, or may be aligned.

The woven structure of the base fabric used in the present invention is not particularly limited, but generally includes plain weave, oxford leno weave, and fabrics in which a light layer and a cotton layer are bonded at their intersections with leno yarn. It is used.

The insertion of aromatic polyamide fiber threads between different types of fiber threads is performed by inserting one aromatic polyamide fiber thread or a group of 2 to 5 aromatic polyamide fiber threads arranged in parallel. It is preferable that one Mfffl fiber thread or a group of 2 to 150 different types of fiber threads arranged adjacent to each other be separated and arranged.

In the laminated sheet of the present invention, a covering layer made of synthetic resin or synthetic rubber is formed on one side or both sides of the base fabric.

The amount of the coating layer can be arbitrarily determined depending on the purpose of coating and the type of coating vJ size, but generally it is 20 to 500.
It is preferable that the weight is 50 to 300 f
/m" is more preferable. The synthetic resin and synthetic rubber forming the WI layer can be arbitrarily selected depending on the purpose of the coating, but polyvinyl chloride and ethylene-vinyl acetate are generally used for waterproofing. copolymer, polyester,
Polyamide (nylon 12, etc.), polyolefin (polyethylene, polypropylene), polyimide, polyamitoy are made from thermoplastic polymers such as carbon fiber, polyether, polyctone, polysulfone, silicone resin, polyphosphazene, polyurethane, synthetic rubber such as fluorine-containing resin, etc. One or more selected types can be used. The synthetic resin or synthetic rubber forming the coating layer is generally highly elastic and flexible, but thermosetting resins such as phenol resins, epoxy resins, unsaturated polyester resins, polyimide resins, triazine resins, and melamine resins are also preferred. , bis-diene polymer resin, etc., or a mixture of these and a thermoplastic resin.

To form the coating layer on the base fabric, a solution or emulsion, sometimes a dispersion, or a film of the desired resin is applied to the base fabric using a conventional impregnation method, adhesion method, or coating method. What is necessary is just to apply it to a desired surface.

Next, the present invention will be further explained by examples.

Examples: Kepler 29 fiber yarn of 400 d/267 f as aromatic polyamide fiber yarn (cut strength crab 22P/d1 elongation at break: 4%), and 500 d/48 f as heterogeneous fiber yarn
polyethylene terephthalate yarn (cutting strength: 8.5r
/d, elongation at break = 15.5%), and by varying the mixing ratio, six types of plain woven fabrics having the following structures were woven.

500d/1 (400d/1) x 500d/3 (40
0d/1) 30/25.4wn X30/25.4mm
The aromatic polyamide fiber threads were inserted between the different types of fiber threads at intervals, and the mixing ratio was as shown in Table 1.

The resulting plain woven base fabric was scoured and dried in a conventional manner, and then coated on both sides with the following composition:
Mixed I° (parts by weight) polyvinyl chloride resin
80 Butylbenzyl phthalate 6
8 Epoxidized soybean oil 7 Calcium carbonate 20Cd-13a
System stabilizer 3 pigments
8 Toluene (solvent) 130 resin treatment solution was applied. The laminated sheet coated with this resin treatment liquid was dried at 90°C for 1 minute and heated at 180°C for 2 minutes. The dry weight of the coating layer in the obtained laminated sheet was approximately 100% of the weight of the base fabric.

Table 1 shows the tensile strength and tear strength of the obtained laminated sheet.

As shown below, it is clear that the laminated sheet (Sample 1) using a base fabric with blank threads has extremely low tensile strength as well as tear strength compared to that of the laminated sheet (Sample 6) using an aromatic polyamide fiber thread base fabric. However, in polyester fiber yarn,
Surprisingly, when aromatic polyamide fibers are mixed at a mixing ratio of 5 to 40% (Sample 2.3.4), the resulting laminated sheet exhibits improved and improved tear strength. The tensile strength was also poor in practical terms.

Patent Applicant Hiraoka Orisen Co., Ltd. Patent Application Representative Patent Attorney Akira Aoki Patent Attorney Kazuyuki Nishidate Patent Attorney Akira Yamaguchi Procedural Amendment (Voluntary) 1981 Reitsu 'ZEI Patent Office Commissioner Kazuo Wakasugi 1. 1 display 1982 Patent Application No. 130415 2, Name of the invention FC fiber laminated sheet with improved tear strength 3, Relationship with the case of the person making the amendment Patent applicant name Hiraoka Orisen Co., Ltd. 4, Agent 7 Google; 1) Specification, page 12, line 8, ryit”
is corrected to rs'/dJ.

(2) On page 20, line 7 of the same document, the phrase “Article Chuo” has been replaced with “
amend the article to ``.

(3) On page 20, line 10, "full score" is corrected to "satisfactory".

l List of attached documents amended patent 114 Scope of request 1 copy 2, Claims 1. A base fabric made of a woven fabric composed of yarns made of aromatic polyamide fibers and yarns made of different types of fibers, and formed on at least one surface of the base fabric, and made of synthetic resin or synthetic rubber. In the fiber laminated sheet consisting of a covering layer, the diameter and/or weft of the base fabric has a mixing ratio of 1 to 40%.
and/or 2.54% of the aromatic polyamide fiber yarns and 1% of the remaining amount of the aromatic polyamide fiber yarns; The breaking strength of the polyamide fiber yarn is 151i-/d or more, and/or the breaking strength of the different type of fiber yarn is υ or more, and the aromatic polyamide fiber yarn described in niii is A fiber laminated sheet with excellent tear strength, characterized in that groups of 2 to 5 adjacent parallel fibers are inserted and arranged between the different types of fiber threads at intervals from each other. .

2. The aromatic polyamide constituting the aromatic polyamide fiber has at least 70 mol% of the following formula (1)% (
): (1) ([However, Ar1 and Ar2 represent divalent aromatic groups, and these may be the same or have different formulas.] A few selected from the repeating groups of The laminated sheet according to claim 1, comprising one type of both.

6. The divalent aromatic group represented by Ar1 in the formulas (1) and (If) is and [wherein A is -o-, -s-, -5o-].

-802-, -Co-, -CH2-, or -c(CH3
)2-] The laminated sheet according to claim 1, wherein the laminated sheet is selected from the group of aromatic dust residues represented by the following.

4 In formulas (I) and (11) above, A r 2
A divalent aromatic 1^mi group represented by: and [where A is -o-, -s-, -8o-, -802-.

The laminate sheet according to claim 1, which is selected from the group of aromatic groups represented by -Co-, -CI42-, or -(CH3)2-.

5. The aromatic polyamide fiber thread is 15 to 3 o y/
The laminated sheet according to claim 1, having a tensile strength of d.

6. The aromatic polyamide fiber thread is 100 to 1500
The laminated sheet according to claim 1, having a denier of #a degree.

7. The laminated sheet according to claim 1, wherein the different types of fiber threads are made of at least one type selected from the group consisting of natural fibers, synthetic fibers, and inorganic fibers.

8. A spun yarn, a multifilament yarn, a basketless filament yarn, or a tape in which the dissimilar fiber yarn is made of at least one type of fiber selected from the group consisting of polyester fibers, polyamide fibers, and water-insolubilized polyvinyl alcohol fibers. The first claim is a yarn.
Laminated sheet as described in section.

9. One or a group of 2 to 5 of the aromatic polyamide PL & glued yarns each have one of the different types of fiber yarns.
The laminated sheet according to claim 1, which is arranged in groups of books or groups of 2 to 150 books.

Claims (1)

[Scope of Claims] 1. A base fabric made of a woven fabric composed of a yarn made of aromatic polyamide fiber and a yarn made of J% seed woven fiber, and on at least one surface of the base fabric. In the fiber laminated sheet formed and comprising a covering layer made of synthetic resin or synthetic rubber, the warp and/or weft of the base fabric is 1 to 40% at a mixing rate.
and/or composed of 91 to 8 said aromatic polyamide fiber threads per 2.54 m and the remaining amount of said different types of fiber threads, and said aromatic polyamide fiber threads are The breaking strength is 159/d or more and/or twice the breaking strength of the different m fiber yarns, and the aromatic polyamide fiber yarns are arranged one by one or adjacent to each other in parallel. A fiber laminated sheet with excellent tear strength, characterized in that each group of 2 to 5 fibers is inserted and arranged between the different monolithic fiber threads at intervals. 2. The aromatic polyamide constituting the aromatic polyamide fiber is at least 70 mol% of the following formula (1)% ()
: () () [However, Ar1 and Arc represent divalent aromatic groups, and these may be the same or have different formulas. ] The laminate sheet according to claim 1, which has at least one type selected from the following repeating groups. 3. The divalent aromatic group represented by Ar1 in the formulas (I) and (II) is and [wherein A is -o-, -s-, -5o-]. -8O2g C0-g CHt"""q or -〇(
The laminated sheet according to claim 1, wherein the laminated sheet is selected from the group of aromatic residues represented by CHs) t-. 4. In the above formulas (1) and (11), the divalent aromatic group represented by Ar2 is and [wherein A is -o-, -s -9-8o -1-8o,
−. The laminate sheet according to claim 1, wherein the laminate sheet is selected from the group of aromatic residues represented by -Co-, -CH,- or -C(CHs)z-. 5. The aromatic polyamide fiber yarn is 15 to 30 r/
The laminated sheet according to claim 1, having a tensile strength of d. 6. The aromatic polyamide fiber thread is 100 to 1500
The laminated sheet according to claim 4, having a fineness of denier. 7. The laminated sheet according to claim 1, wherein the dissimilar fiber threads are made of at least one fiber selected from the group consisting of natural fibers, synthetic fibers, and Kabuki fibers. 8. The dissimilar fibers The claimed yarn is a spun yarn, a twisted filament yarn, a monofilament yarn, or a tape yarn made of at least one type of fiber selected from the group consisting of polyester fiber, polyamide fiber, and water-insolubilized polyvinyl alcohol fiber. Range 1
Laminated sheet as described in section. 9. One or two of the aromatic polyamide fiber threads
Each group of five fibers has one IA type woven fiber yarn,
Alternatively, the laminated sheet according to claim 1, wherein the sheets are arranged in separate groups of 2 to 150 sheets.