JPS5849241A - Manufacture of waterproof sheet - 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 method for manufacturing a waterproof sheet, and more particularly to a method for manufacturing a reinforced asphalt sheet useful as a waterproof layer for concrete buildings, tunnels, etc.

BACKGROUND ART Conventionally, asphalt construction methods and waterproof sheet construction methods, which are generally referred to as thermal construction methods, have been generally used as waterproof construction methods for concrete buildings and civil engineering tunnel construction.

The asphalt melting construction method, called the thermal construction method, is dangerous because it uses asphalt molten at high temperatures, and the use of waterproof sheet construction methods, called the cold construction method, has increased in recent years due to pollution such as odors and smoke, and a lack of special work engineers. The sheets used in the waterproof sheet construction method mainly include ethylene-propylene rubber sheets called polymer waterproof sheets and asphalt sheets. The former has excellent weather resistance, but has the disadvantage of poor adhesion, which is the most important aspect of sheet waterproofing.Also, the latter has good adhesion, but stretches at high temperatures, and expands and contracts during the day and night. In addition, it had the drawback of causing the so-called "bulging" phenomenon due to expansion and contraction in winter and summer.To overcome this drawback of asphalt-based sheets, flattened asphalt-modified sheets and rubber-modified asphalt sheets were developed, but the purpose was has not yet been achieved.

Recently, in order to improve the flexibility and flexibility of asphalt sheets at low temperatures and to prevent asphalt from softening at high temperatures, asphalt has been modified with gum, and this method is used to create waterproof seals. The basic method is to mix liquid rubber and a crosslinking agent with asphalt, and then apply this reactive mixture onto the base fabric and allow it to penetrate, and a doctor knife is used to apply the mixture. However, the above reactive formulation 1. The pot life (the time from mixing to gluing) is short, so if a reservoir forms in the doctor knife part, it will glue in that area immediately. Therefore, it is impossible to produce tarpaulin sheets on an industrial scale using this method.According to the research of the present inventor, if continuous production is attempted using this method, the doctor knife will be replaced every 10 minutes at the most for 3 minutes. I had to do this and still couldn't get a homogeneous product. Furthermore, if the amount of reactive compound or the amount of catalyst is decreased in an attempt to slow down gluing, the amount of asphalt relative to the gluing portion will increase, and not only will a tarpaulin sheet with the desired physical properties not be obtained, but the reaction will be delayed. It takes too much time and work efficiency drops significantly.

Therefore, an object of the present invention is to provide a method for homogeneously manufacturing a three-dimensionally crosslinked waterproof sheet with excellent waterproof properties and physical properties at high and low temperatures.

Further, the object of the present invention is to coat a base fabric with a fluid reactive composition prepared by mixing asphalt and a reactive urethane rubber composition consisting of two or more components in a predetermined ratio on a base fabric using a hanger die. It is an object of the present invention to provide a method for continuously manufacturing a tarpaulin sheet.

According to the present invention, the above object is a process of sequentially rolling a base fabric made of organic or inorganic fibers at a predetermined speed, and a process in which asphalt and a reactive urethane entangled with two or more components are mixed together in a predetermined ratio. A step of preparing a fluid reactive composition by stirring and mixing, a step of sequentially applying the Mukuro reactive composition to the dispensed nine base fabrics, and a step of sequentially applying the reactive composition to the applied base fabric while sequentially running the coated base fabric. A step of infiltrating the composition into the base fabric, and reacting the reactive composition applied on the base fabric to obtain a waterproof sheet in which the mixture of urethane rubber and asphalt is integrated with the base fabric. In the method for producing a waterproof sheet, a mosquito-reactive composition is introduced into a coat hanger die having a manifold, the reactive composition is applied onto the base fabric from the outlet of the coat hanger die, and the mosquito-reactive composition is introduced into a coat hanger die having a manifold. The tangential straight line of the outflow trajectory of the coat hanger die at the outlet is set at 45 degrees to 120 degrees with respect to the horizontal, and the distance in the vertical direction from the outlet end of the coat hanger die to the base fabric is A, and the coating thickness of the composition applied on the base fabric is B, then the coat hanger die is installed above the base fabric so that the following relational expression % is satisfied, and the reactivity is This is achieved by a method for manufacturing a waterproof sheet, characterized in that the base fabric is run at an angle in the range of +15 to -20 degrees with respect to the horizontal in order to penetrate the composition into the base fabric.

Examples of base fabrics made of organic or inorganic fibers used in this invention include non-woven fabrics and woven fabrics made from long fibers and short fibers such as polyester, nylon, polypropylene, I-lytecrylonitrile, cotton, linen, and glass. There are braided fabrics, knitted fabrics, etc.

As the material, nylon or F'i/reester is particularly preferable. JI using air permeability tester A369
(measured based on the Frazier type method of SL-1004). -Air permeability is 20ee/cm
"If the time is shorter than 7 seconds, the reactive composition described in detail below will be difficult to penetrate into the base fabric before gluing. On the other hand, if the air permeability is 300.
If the time exceeds 7 seconds, the reactive composition will easily permeate and will drip from the bottom surface of the base fabric, forming a stable rubber-asphalt layer with a uniform thickness on both sides of the base fabric. I won't be able to do that. Also, the nonwoven fabric used in this invention
S-L-1068 (strip method) Tensile strength and elongation at break (strip method) are 8.0 k each
g73a + width 1 or more, and 20- or less are Natsume, Shikake respectively 1-2 kg / 3 cps width or more, and 15
Chi or less is better.

An example of the polyethylene component of a reactive urethane rubber composition consisting of two or more components is one containing a diene monomer as a main component and having a number average molecular weight of 500 to 1000, preferably 500 to 5.
There are 000 polymers. Specific examples include 1,2-polybuta, diene, and 1-polybuta, each having a hydroxyl group in its molecule.
．． 4-/liptadiene, polyisogrene, polychlorogrene, 1,2-polypentadiene, styrene-butadiene copolymer, acrylonitrile-zotadiene copolymer, tutadiene-isoprene copolymer, butadiene-pentadiene copolymer, hydroxylated terminal 1 . Unsaturated dicarmenic acid half ester compounds such as 2-polybutadiene and 1°4-polybutadiene - 1 and hydrogenation 1,2. −／
! J Butadiene, 1 + 47! Liptadiene, styrene-butadiene polymer, acrylonitrile-butadiene co-I liper, butadiene-in glyco/9-mer, tutadiene-pentadiene co-I liper-1,2-butadiene, 1,2-butadiene, 1,4-butadiene Among the unsaturated dicarboxylic acid half esters of butadiene and the like, compounds mainly having a 1,4-/liptadiene structure and compounds mainly consisting of polyisogrene are most preferred.

A castor oil derivative posiol is also used as the other boriumol component used in this invention. Examples include castor oil polyester obtained from castor oil and castor oil and a 4-lical acid such as adipic acid; A castor oil-lyester obtained by dicarboxylic acid; a reaction product of castor oil and an alkylene oxide, such as propylene oxide, ethylene oxide, ethylene oxide, etc.;
Furthermore, it is an alkylene oxide addition polymer of the above-mentioned castor oil ester.

Furthermore, a dimer acid O derivative polyol is also used as the t-ol component. An example is Dimer 52/Reester, which is the reaction product of an acid and a short chain diol, triol, or polyol. Dimer acid polyesters which are the reaction products of dimer acids and 4-realkylene glycoles, -realkylene triols or long chain polyols, such as castor oil, as well as Ktj each of the above-mentioned dyes! -Alkylene oxide addition polymers of acid polyesters can also be used. Also used are reaction products of dimer acids, other dicarboxylic acids, such as adipic acid, and the various short-chain diols, triols, or polyols mentioned above. Furthermore, as other derivatives, reaction products of dimer acid and alkylene oxide can also be used.

In the present invention, in addition to using the dioic acid or castor oil derivative polyol alone, various polyols for general 4-urethane product production can also be used in combination.

The number average molecular weight of the dimer acid and/or castor oil derivative diol is approximately 600 to 10,000, preferably 600 to 5,000.

Examples of the isocyanate which reacts with the above polyol to form a urethane bond include tolylene diisocyanate, polymethylene 4-lifenylene I-liisocyanate, and 1.5
- Naphthalene diisocyanate, hexamethylene diisocyanate, etc., but polymethylene 4-lifenylene I-liisocyanate is preferred.

On the other hand, there are no particular restrictions on the asphalt, and examples such as Evastraight asphalt (penetration of 40-200), plain asphalt, natural asphalt, etc. can be used as desired.

Furthermore, mineral oil with a high boiling point, such as process oil or machine oil, may be added.1 In addition to the above-mentioned raw materials, in this invention, various additives for improving strength and curing catalysts for accelerating curing may be added as necessary. , other anti-aging agents, colorants, antistatic agents, etc. can be contained.

Specific examples of additives for improving strength include 1.4-
Butanediol, short chain diols such as 1,3-butanediol, glycerin, 2-ethylhexanediol, and 3,3'-dichlorobenzidine, 4,4'-methylene-bis-2-chloroaniline, N, N-bis-(2
-Ha(P-roxygulononol)aniline, etc.

This additive is preferably contained in an amount of 0 to 20 parts by weight per 100 parts by weight of the reactive urethane composition.

The proportion of the reactive urethane rubber composition may be 5 to 50 parts by weight based on the total weight of the asphalt, the reactive urethane rubber composition, and other additives.
That is, asphalt and other additives are preferably used in a proportion of 95 to 50% by weight based on the total weight.

It is also possible to use a brepolymer in which a reactive urethane consisting of two or more components is partially or completely reacted with a five-group acid.

In the method of this invention, the ore grains used as necessary include borax, sand, iron sand, etc., and these ore grains partially act as a mold release agent to prevent stickiness of the asphalt composition. However, if these are not used, it is preferable to use paper, cloth, etc. coated with or impregnated with fluororesin, silicone resin, etc., as a mold release material.

Next, the method for manufacturing a waterproof sheet of the present invention will be explained in detail along the steps.

First, the base fabric is fed out repeatedly, and the feeding rate varies depending on the reactivity of the reactive compound, the type and amount of the catalyst, the concentration of the reactive compound, the temperature of the raw material system, and the twin length K. ) Increase the delivery speed as the reaction becomes faster. Generally, it is best to do this at a speed of 47 min/min or higher.

To prepare the reactive composition, the asphalt, the reactive urethane, the 4-lyol and 1-lysocyanate, and optionally the catalyst are conveyed in predetermined proportions into a stirring mixer and each component is mixed. Mix. Do you use it? As a general-purpose gear 4 ring or! A ranger f pump can be used. In addition, the stirring mixer is preferably equipped with an i-bin type stirrer, and the stirring rotation speed is 1000 to 600.
Preferably, it is 0 revolutions/minute.

The reactive composition thus prepared by stirring and mixing is introduced into a coat hanger for coating on the base fabric. It has essentially one injection port for the Coat Hanger Dye Co., Ltd. reactive composition, and is equipped with a manifold that communicates with this injection port. The basic structure of such a coat hanger die is described in Japanese Unexamined Patent Publication No. 152457/1983, and this invention basically utilizes that structure. However, this publication relates to the application of a normal reactive resin, and it has been found that when applying a reactive urethane♂♂-asphalt mixture as in the present invention, conditions that are compatible with its structure are required. Ta.

The coat hanger die used in the present invention will be explained based on FIGS. 1 to 3. Figure 881 is a partially cutaway perspective view of the goo, Figure 2 is a partially cutaway front view of the company die, and Figure 3 is a vertical sectional view taken along lll-1 in Figure 2. As shown in the figure, this coat hanger die is composed of two block-shaped members, namely a front W member 11 and a back member 12.

This die has a reactive composition inlet 13 located at the center in the width direction of the die, and a flared portion 14 in this inlet 13.
A first manifold 15 is formed which communicates with the first manifold 15 via the first manifold 15 . 1g is a fixed lip and J7Fi variable lip. The gap between the grips (outlets) 240 and 240 is adjusted by "C" at the inlet port. 22 and 2S.

The reactive composition enters the May from the injection port 13, passes through the p1 manifold 15 and the Guiland 25, is discharged from the Guilip 24, and is applied onto the base fabric. In this case, the amount of reactive composition discharged from the Gurilip 24 reaches from the nine die injection port IJ to the Gurilip 24t? 1IIIia
It is necessary to make it almost uniform even in one section. To this end, the width and cross-sectional area of the manifold 150 are made equal to or smaller from the center to the ends. That is, as shown in FIG. 2, the width DsF of the manifold portion near the center
The width of the manifold part located far away from the center is set to be equal to or greater than that, and the cross-sectional area at Dl is set to be equal to or larger than the cross-sectional area of Dl. Furthermore, the opening angle of 1 manifold IB is Fi15.
The temperature is preferably 0 degrees or more and less than 170 degrees,
The opening angle is the opening angle of the manifold section at the positions 115 and 3δ of half the width of the die (6) in one direction or the other direction from the center in the width direction of the die (mill-river), as shown in Figure 2. Center or point X (1150 points) and y (3
It means the angle θ represented by two straight lines connecting 15 points). If this angle j1je is 170 degrees or more, there will be a large difference in the discharge time, especially the residence time at the end of the goo, and if this angle 0 is less than 150 degrees, the discharge time, discharge amount, and residence time will be large. Otherwise, the glue will adhere to the inside of the gui, making it impossible to put it to practical use.

In other words, if the residence time and discharge amount of the reactive composition within the goo are not uniform over the entire longitudinal width of the goo, the reactive composition will not be able to penetrate uniformly into the base fabric, and in addition If the time is long, it will become grouped within the group.

Furthermore, the ratio between the total internal volume of the die land 25 and the grip 24 parts and the volume of the manifold 15 is t:O,S~1:1.
0. It is desirable that the Guiland gap is 2.5 days or less. By adjusting the die ring adjusting melt 18, uniform residence time and uniform discharge can be finely adjusted.

The coat hanger angle is 45 degrees to 120 degrees to the horizontal.
It is preferable to install the goo at an angle within the range of 100°.This installation angle has nothing to do with the angle of the goo itself, but the flow direction of the discharged material (tangent to the outflow trajectory) at the goo outlet is made with respect to the horizontal direction. It means an angle, and if the line segments that are orthogonal to each other are the coordinate axes (vertical axis y1 horizontal horizontal axis X)! It is an angle about an axis. If the angle between the die lip and the horizontal is less than 45 degrees, the area around the reaction liquid discharge part of the die lip will become dirty, resulting in linear stains on the product. Moreover, if the temperature exceeds 120 degrees, the die rig becomes more contaminated than in the case of 45 degrees or less, making long-term operation impossible.

In addition, when introducing the reactive composition into the die, the amount of the introduced composition (1/min) is 11. When the actual volume (4) of the substance is C, it is desirable that the value of f shown in the following relational expression is 2.0 or more, preferably 2.5 or more. It can also be said that it is an indicator showing whether the composition is replaced within the body within the time it takes for the reaction to occur.

The reaction rate-determining time here refers to the mixing conditions under which the reactive urethane rubber component is actually introduced into the goo using the agitating mixer of the means for carrying out this invention, and the mixing conditions at which the reactive urethane rubber component is mixed at the temperature of the goo so that the viscosity is lower than the initial viscosity. 〇 - The time (minutes) until the increase is narrowed.

As an example of this method, the mixed solution may be placed in a beaker and immediately measured using a diaphragm resistance electroviscosity meter XFiB model viscosity needle. If the f-value is not within the above-mentioned range and is less than that, the composition will form in the goo in a short period of time, making it impossible to operate for a long time.

Similarly, the flow velocity inside Guiland excluding the manifold is 0.
It is necessary to maintain the speed at 8 m/min or higher.

If this flow rate is less than 0.8 m/min, even if the above f value is satisfied, the goo wall surface cannot be washed with the raw material before reaction.
The composition in the dye land becomes glue in a short time and cannot be operated for a long time.-1 Generally speaking, in the case of a coat hanger made of thermoplastic resin, the flow velocity in the die land is 0.8 m/ It is a necessary condition to maintain the flow of molten resin within the goo at a flow rate of less than 1 minute, but with the reaction composition of this invention, it is firstly necessary to sufficiently wash the inside of the gou with its own flow. This is completely the opposite of the way I have been thinking up until now.

The agitation mixer, generally called a mixing chimper, and the coat hanger must be essentially one unit.
Also, the connection between the mixer outlet and the Courteno/Gardai inlet path until it substantially touches the manifold must be close to a straight line, and the connection curve must have a radius of curvature of 55W or more. .

It is best to integrate the stirring mixer and the goo with screws, etc. The contact point between the manifold of the coat hanger die and the goo inflow path and the outlet of the mixer are as close as possible. It is better to become

An important point in this invention is the relationship between the distance (spacing) from the outlet of the coat hanger die to the base fabric in the vertical direction and the thickness of the reactive composition applied onto the base fabric*
*'i As shown in the figure, when the above distance is A and the above thickness is B, the following relational expression is used in this invention: 1.1. <-≦lO, the meeting must be satisfied. (Note: Section 44 VC is difficult to penetrate, and the upper and lower surfaces of the base fabric are not completely covered by the reactive composition, which is not preferable. Also, even if the temperature exceeds 1120 degrees, the reactive composition will continue to flow in the direction of travel.) The surface of the flowing product has one ripple.”
At the same time, a problem arises in that the reactive composition is difficult to penetrate into the base fabric.

In this way, while running the base fabric, the applied reactive composition penetrates into the base fabric and hardens, and the next waterproof sheet is obtained in which the mixture of urethane rubber and asphalt becomes integrated with the base fabric. It will be done.

After the reactive composition is applied and until it is cured, mineral particles can be sprayed onto one or both sides of the base fabric. In addition, the reactive composition discharged and applied from the goo enters the infiltration process, but after infiltration, the composition adheres to the support roll of the base fabric, and as the amount of this adhesion changes, the base fabric tends to meander. There is. If the tension applied to the base fabric is increased in order to reduce this meandering, vertical streaks will occur on the base fabric, making it difficult to obtain a product with uniform thickness, and the penetrating composition will be rinsed off by the support roll. Generates raw material loss.

In order to solve these problems, we investigated so-called air support, in which gas is blown from below the base fabric to support the base fabric, and good results were obtained. This air support is used from the time when the reactive composition is applied to the base fabric and applied by penetration until the reactive composition reaches the lower surface and before sanding, and can be used alone or in combination with regular roll support. It can be used as

In addition, as a method for holding air, it is better to blow out from a thin slit or punched metal, and instead of blowing out over the entire surface, it is also blowing out from a partial part, so that the reactive composition can penetrate between the air blowing parts. It is also preferable to maintain the temperature of the blown air at 50°C to 120°C. “These air techniques are particularly good for synthetic non-woven fabrics, such as polyester and boria-based non-woven fabrics, because these non-woven fabrics are treated with a reaction solution of 100°C or higher, placed on top, and then stretched with a large sieve. The fibers of the non-woven fabric stretch and remain in the product as thermal residual stress, and the product may shrink due to heat after installation.Therefore, the tank is expensive.

It is not possible to apply

For example, the product width is 1ms and the product weight is 2000P.
/ To manufacture a product for sea bream 1, a blower with a capacity of 45-7 minutes was prepared, and from the bottom side, 300 mm were drilled at intervals of 600 mm in the longitudinal direction using a metal method with a hole area ratio of 10.29 mm.
Air support was provided at four locations across the width. The results are good, and the adhesion to the bottom roll, etc., such as roll support, is completely (&9).

shoulder Next, this invention will be explained in detail with reference to FIG.

Asphalt tank as raw material tank:/') 41m, polyincyanate tank 41b%? Riolu tank 41c
There are 1 catalyst tank 41d, each with 4J metering pump.
a * 4 J b , 4 J a a 4 J d
is connected to. In addition, a solvent tank 42 is installed as another tank, and the raw materials conveyed at a constant rate during washing 4Jd of the reaction raw materials after the completion of production enter a mixing chamber 45 stirred by a motor 44, and are further transferred to a coat hanger die 46.
It is applied to the upper surface of the base fabric 48 that is rolled from the base fabric roll 47 through the process.

49a/411b Fi is a tensile roll for uniformly speeding the base fabric, and together with roll Jjij roll 49b, it is a tensile roll for making the base fabric a smooth surface.
This is to make the position 5 where the reactive composition falls uniformly flat. Roll 53*+13b*S3e, r63dt
53m is a carrier roll, which holds the base fabric coated with the liquid reactive composition from the bottom surface.Of these rolls, 13* and 13b are preferably rotatable;
1mm, 13t, 1m, 53m is better with solid feet.

The applied reactive composition permeates into the base fabric before reaching the roll 54, and the reactive composition is uniformly adhered to the bottom surface of the base fabric.

The ore grains carried by the packet 55 enter the hopper 5c, and a certain amount of sand is dropped from the hopper outlet 51 onto the rolls ss, ss, and is deposited uniformly on the top and bottom. After the ore particles have adhered, the base fabric passes through tensile rolls 60 and press rolls 61m and 6.
1b, it is pushed into a certain amount of the reactive composition whose surface has just solidified, and the tensile strength At6 J e
It is air cooled while passing through 64s65.611.61, and then water cooled roll 61th, 611b + 611@+#
Jd, g#*, further product thickness control 69*,
The product is wound onto the product take-up roll 10 via 69b.

The reaction raw material discharged from the outlet 51 of the die 46 is transferred to the base fabric 4
8, or may be located on the upper surface of the tension roll 52 or between the carrier rolls 5jm and 51, but in this invention, the asphalt reactive composition liquid O from the die falls into the base fabric. Make a straight line through the infiltration tube to the point where it is first completed, with an inclination of +15° to -20° K11l
I must stand.

Examples of this invention will be described below.

Examples 1 to 9 Straight asphalt (needle 1 [80-100 Nippon Oil Co., Ltd. $1]) 4.8 kg/m%n, Polyph p
Sixyn I Riolu (trade name, poly bd R-45
HT: ARCOCHEMICAL Co, )1.06
kl/wim, /refz=vn4+)lfvnl
Liisocyanate (trade name MDICB-200, manufactured by Mitsui Nichi Urethane Co., Ltd.) 0.141 hours/m S n *
Dibutyltin silacrate (manufactured by Nitto Kasei Co., Ltd.) 0,0
3 kg/mln (poly Md B4:B ET
(already diluted to 1 luQ times) were introduced into the mixing head.

The temperature of each raw material is 130℃ for asphalt and 80℃ for 4 liters.
, the polyisocyanate was 30°C, the catalyst was 40°C, and the discharge temperature from the mixing chamber was about 120°C. The zero reaction rate-determining time was determined as follows. The initial reaction viscosity was measured by mixing and discharging other raw materials without adding a catalyst, then adding a catalyst and discharging, and the 0 reaction rate determining time determined at the point where the viscosity increased by 30% was about 19 seconds. there were. Die opening angle 11s4 [, Gui effective width 750 degrees, die separation l! I 1
- o kg/3cs) w Ko12
on 9/351. The tensile elongation was 15 cm (vertical 1B-W) (tensile strength and elongation were measured by JISL-1096 strip method).

Since the volume of the connecting pipe between the gou and the chamber is 390 csm, the 9f value is as follows.

Also, the conveyor speed is 3.8 mm/min.

The implementation results are as follows.

Among the above, the physical properties of Good Example 20 are tensile strength 1i20.6ψ (20°C) and tear strength 7 kl/ex'', and the results of comparative example are as follows.

Note: NG in the table above indicates that the item is defective in the points pointed out.

Comparative Example 11 As in Examples 1 to 10, asphalt urethane resin was mixed and discharged. A doctor knife was prepared in place of the die, and the mixed liquid was traversed in a 7-way direction.

After 2 minutes, the entire doctor knife turned into a circle, making continuous production impossible.

As described above, according to the present invention, the asphalt-urethane rubber reactive composition can be continuously and uniformly applied to the base fabric over a long period of time. Therefore, high-quality waterproof sheets can be stably supplied on an industrial scale.

[Brief explanation of the drawing]

Figure A1 is a partially cutaway perspective view of the coat hanger die used in this invention, Figure 2 is a partially cutaway front view of the coat hanger die shown in Figure 1, and Figure 3 is a diagram taken along the line ■-■ in Figure 2. FIG. 4 is a schematic diagram showing the relationship between the distance from the die to the base fabric and the thickness of the applied reactive composition, and FIG. Schematic diagram for explanation. 13... Inlet, 15... Manifold, 16°1
DESCRIPTION OF SYMBOLS 1...Lip, 26...Die land, 24...Die exit, 41...Raw material loading/removal, 43...Ling, 4
4... Stirrer, 45... Mixing chamber, 46
...Coat hanger die, 48...Base fabric, 56...
・Parable of Ore Grains - 0 Commissioner of the Patent Office Shima 1) Haruki Tono 1. Relationship with the 11 cases in which the case is indicated in Special Axis Sho 56-146525 No. 2, name of the invention Method for manufacturing a tarpaulin sheet 3, Supplement 1 Patent applicant (464) NHK Spring Co., Ltd., 15 Agent 6, Supplement Specification subject to IF (1) The scope of claims is amended as shown in the attached sheet. (2) In the statement! Page J18, lines 11 and 20
In each line, it says "150 degrees", r1 + oiJ
I am corrected. 2 Claims 11) A step of sequentially feeding out a base fabric made of organic or inorganic fibers at a predetermined speed, stirring and mixing asphalt and a polyurethane diimide composition consisting of two or more components at a predetermined ratio. a step of preparing a fluid reactive composition, a step of sequentially applying the reactive composition onto the unrolled base fabric, and a step of sequentially applying the reactive composition onto the base fabric while sequentially running the coated base fabric. and the process of reacting the applied reactive composition to obtain a waterproof sheet in which the mixture of urethane rubber and asphalt is integrated with the base fabric. In the method, the reactive composition is introduced into a coat hanger die having a manifold, the reactive composition is applied onto the base fabric from the outlet of the coat hanger die, and the reactive composition is applied to the substrate at the outlet of the coat hanger die. It is installed so that the outflow trajectory tangent of the reactive composition is 45 degrees to 120 degrees with respect to the horizontal, and the vertical distance from the outlet end of the coat hanger die to the base fabric is A, and the coat hanger die is placed on the base fabric. When the coating thickness of the applied composition is B, the coat hanger die is installed above the base fabric so as to satisfy the following relational expression, and the reactive composition is allowed to penetrate into the base fabric (1==1). A method for manufacturing a waterproof sheet, characterized in that the base fabric is oriented at an angle in the range of +15 degrees to 120 degrees with respect to the horizontal. (2) The air permeability of the base fabric is 20 to 300 (A/cd/
The manufacturing method according to claim 11). (3) The manufacturing method according to claim 111 or 121, in which the manifold of the coat hanger die is opened. , the reaction rate-determining time (minutes) of the reactive composition of the mixed wave is b, and the actual mass of the reactive composition in the coat hanger die fJ (1) is expressed by the following relational expression. Claims 11) to (3) characterized in that the reactive composition is introduced into the coat hanger die so that the value of f becomes 2.0 or more.
The manufacturing method according to any one of Item C2. (5) The average flow rate of the reactive composition in the dye land excluding the manifold where the coating ends is 0.8
Set to m/min or more 1. The manufacturing method according to any one of claims 11 to 41, characterized in that: (6) In order to infiltrate the reactive composition into the base fabric, Claim No. 11 to M, characterized in that the vehicle is run while being maintained at a temperature of 120"C.
(The manufacturing method according to any one of Item 51. (7) The reactive composition has penetrated into the base fabric.
Any method for manufacturing Shini-kisen as set forth in Clause 11 to Clause (6). (8) In the process of permeating the reactive composition into the base fabric, gas is blown onto the lower surface of the running base fabric at predetermined intervals, and the base fabric is supported by the gas. The manufacturing method according to any one of the scope items (11 to 17). Applicant's agent Patent attorney Takehiko Suzue

Claims (8)

[Claims] (1) A step of sequentially feeding out a base fabric made of organic or inorganic TIt fibers at a predetermined speed, stirring and mixing asphalt and a reactive urethane fJ-composition consisting of two or more components in a predetermined ratio to improve fluidity. a step of sequentially applying the reactive Ij1 composition onto the dispensed nine-layer fabric; A method for producing a waterproof sheet, which comprises a step of infiltrating into the fabric, and a step of reacting the reactive composition applied on the base fabric so that the mixture of urethane powder and asphalt becomes integrated with the base fabric to obtain a waterproof sheet. , the reactive composition is introduced into a coat hanger die having a manifold, the reactive composition is spread Km onto the base fabric from the outlet of the coat hanger die, and the reactive composition is introduced into a coat hanger die having a manifold. The outflow trajectory of the reactive composition* is installed so that the wrap is at an angle of 45 degrees to 120 degrees to the horizontal, and the vertical distance from the outlet end of the coat hanger die to the base fabric t is A, and the base fabric When the coating thickness of the composition coated on top is B, the coat hanger die is installed above the base fabric so as to satisfy the following relational expression, and the reactive composition is permeated into the base fabric. A method for manufacturing a tarpaulin sheet, characterized in that the base fabric is run at an angle in the range of +15 degrees to 120 degrees with respect to the water surface. (2) Claim Wi# where the air permeability of the base fabric is 20 to 300 e@ki! The manufacturing method according to item 1. (3) The manufacturing method according to claim 1, wherein the opening angle f of the manifold of the coat hanger die is 150 degrees or more and less than 170 degrees. (4) Let a be the amount (U minutes) of the reactive composition introduced into the coat hanger die, let b be the reaction rate-limiting time (minutes) of the reactive composition after mixing, and calculate the reactive composition in the coat hanger die. The manufacturing method according to any one of claims 1 to 3, characterized by the following relational expression, where C is the substantial volume (a) of the object. (5) Coat hanger die! The average flow rate of the reactive composition in Guiland excluding the second hold is 0.8
The manufacturing method according to any one of claims WJ1 to 4, characterized in that the speed is set at or above ws/min. (6) In order to infiltrate the reactive composition into the base fabric, the base fabric is run while being maintained at a temperature of 50 to 120°C [Claims 1 to 5]
The manufacturing method described in any of the paragraphs (7) The production according to any one of claims 1 to 6, wherein after the reactive composition permeates into the base fabric, ore particles are attached to one or both sides of the base fabric. Method. (8) A claim characterized in that in the process of permeating the reactive composition into the base fabric, gas is blown onto the lower surface of the running base fabric at predetermined intervals, and the base fabric is supported by the skeleton gas. The manufacturing method according to any one of Items 1 to 7.