JPH06220992A - Lining material for concrete panel - Google Patents

Abstract

PURPOSE:To improve the efficiency of drainage and deaeration after concrete is placed while enhancing mold-release characteristics, and to increase even the number of diversions remarkably. CONSTITUTION:The surface of the woven fabric of a thermoplastic synthetic resin is treated in a themocompression bonding manner and a filter layer 3 is manufactured, a synthetic resin web is laminated on one surface of a spun- bonded textile base and a permeable layer 4 is prepared, and the filter layer and the permeable layer are thermocompression-bonded by an adhesive sheet formed through a spun bonding manufacture from a hot-melt resin, thus manufacturing a lining material. The surface of the permeable layer side of the lining material is joined to concrete forms, thus preparing a concrete panel.

Description

Detailed Description of the Invention

[0001]

[Industrial application] Concrete structures such as construction civil engineering are made up of wooden or metal panels to form a formwork, and concrete is poured into the formwork to be compacted and cured. After curing, the mold is demolded and constructed. The present invention relates to a lining material for concrete panels, which is used by being attached to the inner surface of a concrete formwork during such concrete placing work.

[0002]

2. Description of the Related Art In concrete pouring work, after pouring concrete, cracks, junkers, pinholes, etc. occur because water and bubbles in the concrete are not discharged to the outside of the form. Furthermore, the size of the pores contained in the concrete that affects the permeation and diffusion of gas, water, chlorine ions, etc. into the concrete is considered to be 800 to 1500 A °, but these voids increase in size. However, cracks occur due to corrosion of rebar, which is a major cause of significant reduction in strength.

In recent years, the durability of reinforced concrete structures has come to be regarded as a problem, and therefore, it has become necessary to improve the durability of concrete. Therefore, as shown in, for example, Japanese Patent Application Laid-Open Nos. 2-3886 and 2-308049, various woven fabrics, non-woven fabrics,
Adopting a lining material such as perforated film, which is used to quickly discharge excess water and air bubbles in the cast concrete to the outside of the mold through the voids such as woven cloth, non-woven fabric, and perforated film. Has been done.

[0004]

However, in the case where the above-mentioned lining material is adhered to a concrete formwork, there are many problems in construction workability, the number of times the formwork is diverted, the ease of demolding work, and the like. However, the present condition is that it has not been used except for buildings and civil engineering structures that require durability.

In view of the above problems, the present invention aims to improve the efficiency of drainage and deaeration after placing concrete, is excellent in demolding property, and is capable of remarkably increasing the number of diversions. The purpose is to provide wood.

[0006]

In order to achieve the above object, the lining material for a concrete panel according to the present invention is obtained by subjecting at least one side of a woven fabric woven from thermoplastic synthetic resin fibers to thermocompression bonding. To form a filter layer on the back surface of which is formed a spunbond, needlepunched non-woven fabric or a spunbond base fabric on which a web consisting of short fibers of synthetic fibers is laminated and needle-punched. The filter layer and the water-permeable layer are characterized in that they are heat-compressed and adhered by a heat roller or a hot press machine with an adhesive sheet formed from a hot-melt synthetic resin by a spunbond method.

Further, these thermoplastic synthetic resin fibers have a low melting point in a yarn of a composite synthetic resin fiber in which the surface of a core material made of a high melting point synthetic resin is sheathed with a low melting point synthetic resin or a thermoplastic synthetic resin fiber. It may be composed of a mixture of synthetic resin fibers.

When this concrete panel lining material is attached to the formwork, the surface and the peripheral part of the formwork are rolled up and entangled and fixed with an industrial stapler. When the lining material is adhered to the mold, a pressure-sensitive adhesive coating layer is provided on the back surface of the lining material in advance, and a release sheet (release paper) is attached to the coating layer, and the release layer is released. The sheet can be peeled off and attached to a concrete panel with an adhesive to line it.
In this case, it is most preferable that a synthetic resin film is previously attached or thermocompression-bonded to the water-permeable layer on the back surface of the concrete panel lining material, and an adhesive is applied to this film to form a coating layer.

[0009]

Next, the function of the lining material for concrete panels according to the present invention will be described. That is, the heat-treated smooth surface is on the concrete side, and the back surface provided with spunbond or non-woven fabric is on the form side, and the concrete panel is attached to the form. When concrete is placed in this panel, the solid content in the placed concrete is filtered by the filter layer, but excess water and air bubbles in the concrete have a filter layer having pores that are continuous in the surface area direction of the lining material. Through the water-permeable layer on the back surface, and is discharged to the outside through the gap between the panels.

In the lining material for concrete panels according to the present invention, a woven fabric woven of thermoplastic synthetic resin fibers is subjected to thermocompression bonding, and a water-permeable layer is attached and integrated on the back surface thereof. In the surface filter layer, the spun yarn composed of stable is pressed in the thickness direction and the fibers are partially fused to form fine voids, so the cement particles are filtered on the surface of the filter layer, Does not penetrate into the permeable layer. Therefore, since the cement particles in the concrete do not bite, the releasability at the time of removing the mold from the concrete is excellent, and the step of applying a release agent to improve the demolding can be omitted.

The adhesive sheet produced from the hot-melt resin by the spunbond method has long fibers in which the hot-melt resin is entangled to bond the filter layer and the water-permeable layer, and
Since there are voids formed between the long fibers in the sheet surface area, a large number of water-permeable gaps, that is, water passages are formed in the adhesive surface between the filter layer and the water-permeable layer. The spunbond or needlepunched nonwoven fabric of the water permeable layer forms a water passage having an appropriate thickness between the filter layer and the mold surface.
In particular, the use of a non-woven fabric in which a synthetic fiber web is laminated in the water permeable layer is effective in securing a water passage.

When a woven fabric made of a composite fiber sheathed with a low melting point synthetic resin is used, the filaments are easily flattened, and at the same time, the filaments are partially fused to form fine pores. Furthermore, the peelability from concrete, which is increased and effective, is further improved.

If a pressure sensitive adhesive is further applied to the surface of the water permeable layer,
It can be used for forms that do not use staples, such as steel forms, and at the same time it does not cause wrinkles or slack when pasted on the panel, and it has a round or parabolic rounded shape. The inner surface can also be fitted along the panel surface.

In particular, when the concrete lining material is pasted on a formwork using lauan plywood or softwood plywood as a weir, and when concrete is placed, the pigment, resin component, lignin, tannin in the plywood, Or, sugar reacts with the alkaline component of concrete and exudes to the surface of the lining material,
Although there is a concern that the concrete surface may be colored, discolored, or surface hardening may be poor, in the lining material of the present invention, in particular, a synthetic resin film is interposed between the back surface of the water permeable layer and the adhesive coating layer. By doing so, it is possible to prevent the harmful components from leaching from the plywood into the lining material, and to obtain a clean concrete surface.

In this way, the concrete lining material is obtained by removing excess water and bubbles in the concrete,
While preventing the occurrence of concrete junkers and pinholes, the water-cement ratio of the cover concrete is lowered to neutralize carbon dioxide in the atmosphere, infiltrate chlorine ions in seawater and snow melting materials, and freeze and thaw the concrete. It is possible to construct a durable concrete structure by preventing cracks and the like.

[0016]

EXAMPLES Examples of the lining material for concrete panels according to the present invention will be specifically described below with reference to the drawings.

FIG. 1 is an external view of a panel in which a lining material X for a concrete panel according to the present invention is attached to an outer surface of a plywood frame 1 by an industrial stapler 2. FIG. 2 is a lining material X for a concrete panel. It is an external view of the panel which stuck the outer surface. 3 to 5 are cross-sectional views of the lining material X for concrete panels, and FIG. 6 shows a state in which concrete is placed in a formwork 1 lined with the lining material X for concrete panels according to the present invention. It is the sectional view shown.

In the figure, 1 is a plywood form, 2 is a stapler for lining, 3 is a filter layer, 4 is a water permeable layer, 5 is an adhesive for adhering the filter layer and the water permeable layer, and 6 is an adhesive coating layer. , 7 is a release paper, 8 is a synthetic resin film, 9 is a joint between molds for drainage, and 10 is cast concrete.

FIG. 7 is a plain weave structure diagram of a woven fabric of thermoplastic synthetic resin fibers used for the filter layer 9 of the lining material X for concrete panel according to the present invention. Is a plan view, (b) is a sectional view, and (c) is a right sectional view. In the figure, 1, 2, 3, 4, 5, and 6 are wefts, 1 ',
2 ', 3', 4 ', 5', 6'are warp threads. FIG. 8 shows the state of the fiber structure obtained by thermocompressing the above woven fabric,
(A) is a plan view, (B) is a sectional view, and (C) is a right sectional view, respectively.

FIG. 9 is an enlarged view of the fiber surface before the thermocompression bonding of the weft and warp shown in FIG. 7, and FIG. 10 is an enlarged view of the fiber surface after heat treatment.

The woven fabric of thermoplastic synthetic resin fiber is
It is woven with twisted yarns, aligned yarns, flat yarns and the like of thermoplastic resins such as polyamide type, polyester type, polyacrylic type, polyvinylidene chloride type, polyolefin type and polyurethane type. Also, on the surface of the core of high melting point synthetic resin,
A composite fiber having a core-sheath structure formed by coating a low melting point synthetic resin can also be used.

As for the thickness of the yarn, a stable fiber having a denier of 1 to 30 denier, preferably 2 to 10 denier, and a filament yarn having a thickness of 30 to 250 denier, preferably 50 to 150 denier are used. The spun yarn used is 10'-60'S, preferably 20'-40'S.

The density of the fabric is 70 to 200 warps / inch, preferably 90 to 180 threads / inch, and weft 50 to 1
20 lines / inch, preferably 70 to 100 lines / inch are used.

The structure of the woven fabric is a plain weave, a twill weave, a twill weave or the like.
The air flow rate is 5 to 50 cm ³ / cm ² / sec as measured by a Frazier type tester, although it varies greatly depending on the tissue.

This woven fabric is a woven fabric composed of spun yarn or multifilament composed of stable as shown in the enlarged surface view of FIG. The shape of the fibers formed by thermocompression bonding at a temperature is pressure-bonded in the thickness direction, and the fibers are partially fused to reduce the voids, so that the cement particles are inside the fiber structure as shown in the enlarged surface view of FIG. It is desirable that it does not invade and solidify in the overlapping portion of the yarn.

Further, since the thermoplastic synthetic resin loses the shape performance of the fiber when the temperature rises to near the melting point of the resin,
The core of the high melting point synthetic resin is composed of a thread whose surface is coated with the low melting point synthetic resin, and the monofilaments in the thread are partially fused or the intersections of the filaments are fused and integrated, resulting in a fine filtration port. A sheet-shaped product can be used while holding.

The thermocompression bonding treatment varies depending on the kind of the synthetic resin, but it is preferably carried out by a heat calender roll at a temperature of 90 to 220 ° C. Since the sheet-shaped woven fabric that has been subjected to the heat treatment is used as a filter material for cement particles, it is essential that it has air permeability, and the air permeability is 0.05 to
It is preferably 20 cm ³ / cm ² / sec.

The water-permeable layer 4 attached to the back surface of the filter layer 3.
Is a material selected from spunbond, needlepunched non-woven fabric, or spunbonded base fabric and needlepunched synthetic fiber short fiber web. The most preferably used material among them is a needle punched nonwoven fabric having a fiber density of 0.1 to 0.5 gr.
/ M ² , and the water permeability is preferably 1 × 10 ⁻⁴ cm / sec or more. In this case, the web made of synthetic resin short fibers has a denier of 3 to 10 and a length of 51 to 64 mm, preferably around 8 denier and a length of 51 mm, and the amount used is 50 gr.
~ 150 gr, preferably 120 gr is used for needle punching to form a water permeable layer.

As a method for adhering the filter layer 3 and the water permeable layer 4 to each other, there are a stitching method using a thread, a dot adhesion method using an adhesive, and a fusion method using a hot melt resin.

The most preferably used method is sandwiching between the filter layer 3 and the water permeable layer 4 a "cobweb" adhesive sheet produced by a spunbond method from a hot melt range such as polyamide or polyester. ,
0.2 ~ with a heat roller at a temperature of 120 ℃ ~ 180 ℃
A pressure of 0.5 kgf / cm ² is maintained for 10 to 40 seconds for pressure bonding.

The concrete lining material X is attached to the formwork 1 by cutting it with scissors or a cutter knife to the size of the formwork plus the size of the formwork. Set the length so that there is a margin of 1 cm for the rotated size, and attach it with an industrial staple 2 as shown in FIG.

As the adhesive for attaching the lining material X to the back surface of the water-permeable layer 4, natural rubber, regenerated rubber, rubber-based or acrylic-based pressure-sensitive adhesive such as polyisobutylene, butylene butadiene, polyisobutylene are used. As shown in FIG. 4, it is desirable to apply these adhesive coating layers 6 in the form of zebra (vertical stripes) or dots to form the coating layer 6.

Further, as shown in FIG. 5, the synthetic resin film 8 attached to the surface of the water permeable layer 4 is made of polyethylene, polyester, polypropylene, vinyl chloride or the like and has a thickness of 0.01 to 0.2 mm. The web forming the water permeable layer 4 is placed on the synthetic resin film 8, needle punching is performed, and thermocompression bonding is performed with a heat roller at 120 to 180 ° C. The adhesive 6 is applied to the synthetic resin film 8. In addition to the method of attaching the synthetic resin film 8, a "cobweb" adhesive sheet of polyamide or polyester fiber is sandwiched between the synthetic resin film 8 and the non-woven fabric 4 and thermocompression-bonded with a heat roller at 120 to 180 ° C. A method etc. can be used suitably.

The filter layer 3 is made of a thermoplastic synthetic resin multifilament or a woven fabric such as a plain weave or a twill weave woven from composite fibers, and at least one surface of the woven fabric is subjected to thermocompression bonding with a heat calender roll, whereby each filament becomes flat. In addition, the filaments are partially heat-sealed to each other to form pores having large stitches with a fine size of about 40 μm. Therefore, the cement particles are filtered on the surface of the filter layer 3, and the surplus water and air bubbles in the cast concrete 10 are filled with the lining material X without penetrating inside and causing clogging.
Is discharged to the outside through the water permeable layer 4 on the back surface, the gap between the butting portions 9 of the plywood panels 1 and the like.

Similarly, in the case of a woven fabric composed of composite fibers, the surface of the filament yarn is composed of a low melting point synthetic resin, and therefore when the thermocompression bonding treatment is carried out, the above-mentioned fusion phenomenon is promptly and completely carried out. It is possible to eliminate the fraying of the thread when cutting.

Further, when the filter layer 3 is subjected to thermocompression bonding with a heat calender roll, it becomes smooth without fine irregularities or fluffs on the surface, so that the actual contact area of the concrete 10 to be placed becomes small, and the concrete 10 is also reduced. Cement particles are used in the filter layer 3 without entanglement of fine fibers.
It does not invade and harden inside the. Therefore, the finished surface can be finished to have a glossy appearance, and the number of times the lining material is diverted can be increased.

A specific configuration example of the lining material for concrete panels according to the present invention will be described below.

A. Preparation of lining material woven cloth (1) Polyester plain weave cloth (70 denier 21
0, air flow rate 30 cm ³ / cm ² / sec), 110
When thermocompression-bonded with a heat calender at ℃ to 130 ℃, a sheet-like material to be a filter layer having an air permeability of 2 cm ³ / cm ² / sec was obtained.

Next, a polyester short fiber web (fiber length of 8 denier 51 mm) was needle punched to 120 gr /
The non-woven fabric of m ² was used as the water permeable layer. Dynac sheet (LNS-00, manufactured by Toyobo Co., Ltd.) made of spider-bonded polyamide produced by a spunbond method from hot melt resin between the filter layer and the water permeable layer.
00) was sandwiched and thermocompression-bonded with a heat roller at 120 to 160 ° C. for about 30 seconds under a pressure of 0.4 kgf / cm ² to obtain a lining material for concrete formwork.

(2) Other materials As woven cloth, polyester plain woven cloth (Unitika Co., Ltd., NL236 ester taffeta, 70 denier 203 pieces, ventilation amount 25 cm ³ / c)
m ² / sec) was heat-treated on one side with a heat calendar of 130 ° C. to obtain a sheet-like material having a ventilation rate of 1 cm ³ / cm ² / sec.

Next, a polyester denier web having a thickness of 5 denier and a length of 64 mm was laminated on one side of (40 gr / m ² ) of 1 denier polyester spunbond and needle punched to be integrated with a base fabric to form a water permeable layer. A non-woven fabric was obtained.

Between the filter layer and the water permeable layer, a hot melt resin spunbond Dynac sheet G-000 is provided.
1 with 0 (made by Toyobo Co., Ltd.)
A heat roller at 30 to 150 ° C. was used for thermocompression bonding under the conditions of time of about 15 sec and pressure of 0.3 kgf / cm ² to obtain a lining material for concrete formwork. A solvent-based acrylic pressure-sensitive adhesive was applied to this in a zebra shape (width 5 mm), and release paper was attached.

(3) Other materials As a woven fabric, a polyester plain woven fabric (manufactured by Unitika Co., Ltd., NL236 ester taffeta, 70 denier, 203, air permeability 25 cm ³ / cm)
² / sec) was heat-treated on one side with a heat calender at 150 ° C. to obtain a filter layer sheet having an air permeability of 0.4 cm ³ / cm ² / sec. Also, a polyester film having a thickness of 0.1 mm has a thickness of 5 denier and a length of 64 on one side.
mm polyester short fiber web 120 g / m ² Was laminated and needle-punched, and then heat-compressed with a heat roller at 120 to 130 ° C. to obtain a water-permeable layer in which a nonwoven fabric was laminated on one surface of a synthetic resin film. The hot melt resin spunbond dynamic sheet C-0000 (polyester, between the web of the water permeable layer and the sheet for the filter layer) was used.
Sandwiched by Toyobo Co., Ltd., thermocompression-bonded with a heat roller of 130 to 150 ° C., and then a solvent-based acrylic adhesive material is applied to the surface of the synthetic resin film in a zebra shape (width 5 mm),
The release sheet was adhered to give a lining material for concrete formwork (Fig. 5).

B. Structure of formwork A liner such as A (1) above is coated with a general coating formwork plywood (90
It was attached with an industrial staple as shown in FIG. 1 so that the woven fabric heat-treated to 0 × 1800 mm was on the surface.

Similarly, the lining material such as A (2) above is peeled off from the general coated plywood (900 × 1800 mm) with the release paper, and the heat-treated woven cloth is made the front surface by the adhesive on the back surface as shown in FIG. It was applied without using a stapler. Furthermore, the lining material shown in the above A (3) is made of softwood plywood (900
The release paper was removed, and the heat-treated woven cloth was stuck on the surface of the same as shown in FIG. This A
(1), A (2), A (3) 3 panels and one ordinary plywood formwork cross section 900 × 900 mm, height 18
A form of a square prism of 00 mm was created.

C. Placing and curing fresh concrete Slump 18 cm (60% water cement ratio) preliminary strength 2
40 kg / cm ² of ready-mixed concrete was poured into the above mold. There was no drainage from the surface on which the plywood form was used, and 2.8 l / m ² of surplus water was discharged from the side of the form to which the lining material was attached and the gap between the lower lining materials.

D. Demolding the mold After curing for 72 hours, the mold was demolded. Both the formwork in which the lining material is attached to the form of ordinary coated plywood and the formwork in which the lining material is attached to the form of softwood plywood can both be released very easily, and No cement adhered to the surface and it was in a state where it could be reused sufficiently. The surface of the concrete structure was dark gray with no flutter or junk.

In particular, in a mold using Lauan plywood and a lining material coated with an adhesive on a synthetic resin film is applied, the concrete surface after demolding has no discoloration due to the plywood. It was not observed, and there was no curing failure.

E. Comparison of surface strength, neutralization resistance, chloride ion penetration resistance, and freeze-thaw resistance. Three surfaces of concrete structure using A (1), A (2), A (3) lining material, Table 1 shows the results obtained by measuring various tests at 9 locations evenly arranged in the upper, lower, middle and left and right centers of each surface using a normally coated plywood formwork at the Japan Building Integration Laboratory.

[0050]

[Table 1]

As described above, when the lining material according to the present invention is used, the surface strength is increased by about 40%, the carbonation gas neutralizes the concrete, and the chloride ion salt blocking property is 1/2 to 1/1 /. It was proved that it became 3, and the durability of the concrete structure was significantly promoted.

[0052]

The lining material for concrete panels of the present invention comprises a filter layer formed by heat-treating a woven fabric woven of thermoplastic synthetic resin fibers, a spun bond, and a water-permeable layer having a low melting point. It is a spider-bond type adhesive sheet made by spunbonding, which is attached by thermocompression bonding. When it is attached to the inside of the formwork and concrete is placed, the durability of the concrete is greatly increased. You can In other words, excess water and air bubbles in the cast concrete are discharged to the outside of the form through the lining material, resulting in high-quality concrete with a low water-cement ratio and preventing the occurrence of pockmarks and junkers on the concrete surface, which is compact and beautiful. It will be finished.

Further, since the filter layer of the lining material in contact with the concrete is finely divided by heat treatment, there is no entrapment of cement, the mold release property is easy, and the lining material is used many times. It is extremely economical and has features such as being able to reduce the cost of concrete placement work.

Further, from the standpoint of environmental protection, when it is necessary to increase the usage ratio of softwood plywood due to the growing international public opinion on the protection of tropical rainforests, it is very useful that these plywood containing a large amount of resin can be used without problems. I have to say that it means a lot.

[Brief description of drawings]

FIG. 1 is an external view of a concrete panel in which a lining material for a concrete panel of the present invention is attached to the outer surface of a mold by an industrial stapler.

FIG. 2 is an external view of a concrete panel in which a lining material for a concrete panel according to the present invention is attached to an outer surface of a mold with an adhesive on the back surface of the lining material.

FIG. 3 is a cross-sectional view of a lining material for a concrete panel.

FIG. 4 is a cross-sectional view of a lining material for a concrete panel provided with an adhesive coating layer on the back surface of the lining material.

FIG. 5 is a cross-sectional view of a lining material for a concrete panel in which a synthetic resin film is interposed between a water permeable layer of the lining material and an adhesive coating layer.

FIG. 6 is a cross-sectional view of the inside of a form showing a state where concrete is placed in the form lined with a lining material for concrete panels.

FIG. 7 is a plain weave structure diagram of a woven fabric of thermoplastic synthetic resin fibers used as an example of a material for a lining material for a concrete panel according to the present invention, in which (a) is a plan view and (b) is a cross section. Figure (c) is a right cross-sectional view.

8A and 8B are organization charts showing a state in which the synthetic resin fiber woven cloth of FIG. 7 is thermocompression bonded, in which (A) is a plan view, (B) is a sectional view, and (C) is a right sectional view.

9 is an enlarged view of the surface of the synthetic resin fiber shown in FIG.

FIG. 10 is an enlarged view of the surface of the thermocompression-bonded fiber shown in FIG.

[Explanation of Codes] 1 Plywood form 2 Industrial stapler 3 Filter layer 4 Water permeable layer 5 Adhesive 6 Adhesive coating layer 7 Release sheet 8 Synthetic resin film 9 Drainage gap 10 Concrete X Lining material

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁵ Identification code Internal reference number FI Technical indication location E04B 1/16 A 7121-2E E04F 13/14 102 B 9127-2E (71) Applicant 591070624 Jay. C-Composite Co., Ltd. 1-3-4 Uchiwaji-cho, Chuo-ku, Osaka-shi, Osaka (72) Inventor Tokuji Fukuoka 2-54 Sanjo-oji, Nara-shi (72) Inventor Seiichiro Ishihara 9-Donomachi, Takatsuki-shi, Osaka 10 Shuttle Garden A-103 (72) Inventor Kazuhiko Tatematsu 2-9-14 Nakamichi, Tosei-ku, Osaka-shi, Osaka Daiho Morinomiya Royal Heights 302 (72) Inventor Yoshinori Wakamatsu 611, Kawasebabacho, Hikone Person Wataru Tashiro 1-5-2 Minamizumigaoka, Izumisano-shi, Osaka Prefecture (72) Inventor Takeshi Yamaguchi 5-chome 1-89-102, Mitsuigaoka, Neyagawa-shi, Osaka Prefecture (72) Inventor Shuichiro Furuya 3-16, Karigigaoka, Hirakata-shi, Osaka Prefecture B-8-301

Claims (4)

[Claims] 1. A surface of a woven fabric woven from thermoplastic synthetic resin fibers is thermocompression-bonded to form a filter layer, and a spunbond, needlepunched nonwoven fabric, or spunbond is formed on the back surface of the filter layer. A lining material for a concrete panel in which any of the water-permeable layers of a nonwoven fabric having a synthetic fiber web laminated on one side thereof as a base fabric is heat-compressed and laminated by an adhesive sheet formed by a spunbond method from a hot melt resin. 2. A thread of a composite synthetic resin fiber in which the thermoplastic synthetic resin fiber is sheathed with a low melting point synthetic resin on the surface of a core material of a high melting point synthetic resin or a high melting point synthetic resin fiber has a low melting point. The lining material for concrete panels according to claim 1, which is a thread formed by mixing fibers made of a synthetic resin. 3. The lining material for a concrete panel according to claim 1, wherein an adhesive coating layer is provided on the water permeable layer on the back surface of the lining material, and a release sheet is attached. 4. A synthetic resin film is attached or thermocompression-bonded to the water-permeable layer on the back surface of the lining material, an adhesive coating layer is formed on the film, and a release sheet is attached. Lining material for concrete panels.