KR100884308B1 - Tarpaulin with Flame Retardants Manufacturing Method and Tarpaulin - Google Patents

Abstract

The present invention relates to a method for manufacturing a tarpaulin containing a flame retardant and a tarpaulin, and more particularly, to add a flame retardant to the tarpaulin for the purpose of preventing damage to life from fire during use, such as a tarpaulin such as a waterproof tent or tent The present invention relates to a method of manufacturing a tarpaulin for use.

The composition of the present invention is a high-density polyethylene (HDPE) is mixed with a flame retardant raw material and heated to heat melt extrusion to produce a film after the stretching operation, the shaping process to produce a yarn by cutting the molded film,

Weaving process of mounting the thread wound to bobbin according to the specification of weaving, and then raising the inclined chamber to the loom to move the weft thread to the left and right using the power of water jet (water spray) to form a tissue,

A coating process of coating low-density polyethylene (LDPE) and color raw materials, optionally one of calcareous powder and flame retardant, or mixing and melting of calcareous powder and flame retardant to woven dough;

Joining process of bonding the coated product to the desired size,

It consists of a cutting process that cuts and rolls the coated and bonded roll of fabric to the desired length.

The effect of the present invention has the effect of reducing the production cost by mixing and molding a low cost material calpet and deca-based flame retardant that was not used in the prior art due to the disadvantages of the material, to obtain a tarpaulin having increased flame resistance than conventional It works.

In addition, the yellowing phenomenon and the transition (transfer) phenomenon occurring in the conventional tarpaulin does not occur by minimizing the defect rate, and has an effect of improving the productivity by facilitating the bonding operation.

 Flame Retardant, Tarpaulin

Description

Tarpaulin with Flame Retardants Manufacturing Method and Tarpaulin}

1 is a process-specific flow chart of the waterproof fabric manufacturing method comprising a flame retardant according to the present invention.

<Description of the symbols for the main parts of the drawings>

10: Sacrificial process

12: HDPE and flame retardant raw materials and mixing process

14: The mixture is heated to heat and melt extruded to produce a film

16: drawing process

18: process of cutting the formed film into yarn

20: weaving process

30: coating process

32: Melting process mixing LDPE and color raw material calcareous stone or flame retardant

34: heating process

36: Coating process on the surface of fabric by woven dough

40: bonding process

50: cutting process

The present invention relates to a method for manufacturing a tarpaulin containing a flame retardant and a tarpaulin, and more particularly, to add a flame retardant to the tarpaulin for the purpose of preventing damage to life from fire during use, such as a tarpaulin such as a waterproof tent or tent The present invention relates to a method of manufacturing a tarpaulin for use.

More detailed configuration of the present invention is a high-density polyethylene (HDPE) is mixed with a flame retardant raw material and heated to heat melt extrusion to produce a film after the stretching operation, the shaping process of producing a yarn by cutting the molded film,

Weaving process of mounting the thread wound to bobbin according to the specification of weaving, and then raising the inclined chamber to the loom to move the weft thread to the left and right using the power of water jet (water spray) to form a tissue,

A coating process of coating low-density polyethylene (LDPE) and color raw materials, optionally one of calcareous powder and flame retardant, or mixing and melting of calcareous powder and flame retardant to woven dough;

Joining process of bonding the coated product to the desired size,

The present invention relates to a tarpaulin manufacturing method and a tarpaulin including a flame retardant composed of a cutting process of cutting and rolling a coated roll of fabric to a desired length.

In the known art, fabrics composed of synthetic fibers such as polyester, polyamide or polyvinyl alcohol or fabrics made of natural fibers such as cotton are coated with solutions or pastes of polymers such as vinyl chloride polymer, chlorosulfonpolyethylene or synthetic rubber By impregnation or by bonding the polymer film to the fabric. In recent years, non-flammable or flame-retardant tarpaulin has been noted, a large number of tarpaulins based on non-flammable or flame-retardant fibers or resins have been developed. Especially known are tarpaulins composed of glass fibers treated with tetrafluoroethylene resin (hereinafter referred to as PTFE), which have been developed to add incombustibility and durability.

This tarpaulin is made by impregnating a glass fiber fabric with a PTFE aqueous acid solution optionally containing a filler, followed by drying and firing at a temperature above 327 DEG C, the melting point of PTFE, several times several times to obtain a thick PRFE layer. .

Since the fluororesin has poor film-forming ability, it is necessary to take such a time step to form a pinhole-free fluororesin layer as a whole with a desired thickness on the glass fiber base fabric. In addition, repeating these steps is inefficient and expensive to produce.

Publication No. 2002-0091288 discloses a tarpaulin using a resin composition for extrusion coating and a method for preparing the same, and more specifically, melts an ethylene-propylene copolymer and an ethylene-octene random copolymer or a styrene-ethylene-butene block copolymer. It is possible to replace tarpaulin made of PVC resin and PE resin because it is flexible and lightweight by producing tarpaulin using kneaded extrusion coating resin composition, and it is recyclable and does not cause environmental problems. It is said to provide tarpaulin, but because it does not add flame resistance, it is a defenseless material in case of fire.

Tarpaulin, which is used for various purposes such as thousands of rooms such as waterproof tents and tents, can be divided into polyvinyl chloride (PVC) tarpaulin and PE (polyethylene) tarpaulin, depending on the material of the woven fabric, among which PVC tarpaulin is multifilament. It is made by coating PVC on both sides of PE woven fabric made of film yarn, and in the case of PE tarpaulin, it is made by coating low density polyethylene (LDPE) on both sides of high density polyethylene (HDPE) film.

The flame retardant can be divided into TBBA (dis pensol) Bromine and Deca Bromine. TBBA (dis pensol) Bromine is stable in molecular structure and mainly used in PE, PP and ABS petrochemical processing. Compared to the Deca-based system, it is more expensive and inferior in flame retardancy.The Deca Bromine system is mainly used for products used in construction sites due to its unstable molecular structure, and the price is lower than that of TBBA (tetrabromobisphenol A) system, When applied and used, discoloration is caused by instability of the molecular structure and certain components of flame retardant are deposited on the coater rollers, resulting in poor adhesion, yellowing and bromination on the tarpaulin surface. There is a problem that causes a decrease in efficiency in the industry to avoid use.

In particular, TBBA, which is more expensive than Deca-based, has a low flame retardancy due to 30% lower flame retardancy than Deca-based. However, due to the drawbacks of the Deca system is not used.

When deca bromine is used, the transition occurs after a certain time, and white powder on the surface is drawn to the surface, so that the coating is not performed smoothly, and the bonding is not performed properly due to the powder component transferred to the surface in the bonding process. There is a problem, and relatively expensive TBBA (dis pensol Bromine) system has been used as a coating material.

In particular, the conventional tarpaulin has a high transfer rate (transferring) phenomenon has a high defect rate has been derived from the troublesome work and the interruption of the work process is introduced into the coating machine again during the work process.

Accordingly, an object of the present invention is to solve the above problems, low-density polyethylene (LDPE) in the fabric film layer woven in the warp and weft direction by mixing the flame retardant in the HDPE molding process It is to provide a tarpaulin manufacturing method and a tarpaulin including a flame retardant to mix the flame retardant, color raw materials and calcareous stone powder as a low-cost material and to improve the yellowing and transition phenomenon.

The composition of the present invention for achieving the above object is a high-density polyethylene (HDPE) is mixed with a flame retardant raw material and heated to heat and melt-extruded to produce a film and then stretched, the fine film is cut to produce a yarn Fair,

Weaving process of mounting the thread wound on the bobbin to the warp yarn and weft thread according to the weaving specifications, then placing the warp yarn on the loom and moving the weft yarn to the left and right by using the force of water sprayed to form a tissue,

A coating process of melting low-density polyethylene (LDPE) and color raw materials, optionally at least one of calcareous stone and flame retardant, into a woven dough and coating the raw unit;

Joining process of bonding the coated product to the desired size,

It consists of a cutting process in which the coated and bonded roll of fabric is cut out to the desired length.

The present invention for achieving the object, in the method for producing a tarpaulin containing a flame retardant,

The manufacturing process (10) which produces the yarn containing a flame retardant,

Weaving process of weaving yarn by weaving thread wound to bobbin according to weaving specifications and then weaving the warp yarn to the left and right by using the power of water jet (water jet) by raising the inclined chamber to the loom (20 )and,

A coating process 30 for heating and drying the dough and applying a molten resin including a flame retardant to the surface of the dough;

Bonding process 40 for continuously melt bonding the tarpaulin using a heated bonding roll,

It consists of a cutting process 50 for cutting the tarpaulin wound on the bonded large roll to the required size.

Said weaving process (10) is a mixing process (12) of mixing with a high density polyethylene (HDPE) and flame retardant raw material, a process (14) of producing a film by melt-extrusion by heating the mixture to heat, and a process of stretching (16) And, it can be made by subdividing the molded film into a process 18 for producing a yarn by cutting.

In the mixing process 12 of mixing the high density polyethylene (HDPE) and the flame retardant raw material, it is preferable to mix the high density polyethylene 66.7 to 98.2 wt% and the decabromine flame retardant of 1.8 to 33.3 wt%.

In the mixing step 12 of mixing the high density polyethylene (HDPE) and the flame retardant raw material, it is preferable to mix 73.7 to 92.3 wt% of the high density polyethylene and 7.7 to 26.3 wt% of the TBBA flame retardant.

The mixing process (12) of mixing the high density polyethylene (HDPE) and the flame retardant raw material is 80 to 85.5 wt% of high density polyethylene and 1.8 to 6.2 wt% of the deca-based flame retardant and 12.7 to 13.8 wt% of poly in a high density polyethylene film forming process. It is preferable to comprise and preform prepropylene.

The coating process 30 is a low-density polyethylene (LDPE) and the color raw material, optionally calcified stone and flame retardant any one of the melting or mixing of calcite powder and flame retardant (32), and heating the dough (34) ) And a process 36 for coating the upper and lower surface raw units of the woven dough.

The low melting polyethylene (LDPE) component is 80 to 90.9% by weight, 1.8 to 6.8% by weight of color material, and 7.3 to 13.3% by weight of TBBA flame retardant.

The low melting polyethylene (LDPE) component is 63.4-80.7% by weight, 1.8-6.6% by weight of color material, and 17.5-30% by weight of calcareous powder.

In the mixing and melting process 32, the components melted by mixing are low density polyethylene (LDPE) components of 69.8 to 90.9 wt%, color raw materials of 1.8 to 5.8 wt%, TBBA flame retardant 7.3 to 19.4 wt%, calcareous stone 0.0 to It is preferable that it is 5 weight%.

The process of heating the dough (34) is to evaporate the moisture contained in the surface or inside of the dough to improve the coating quality, since the dough is heated, low density polyethylene (LDPE) is heated to contain the decabromine-based It is desirable to suppress the flame retardant seeping out (transition phenomenon).

It also relates to a tarpaulin produced by a tarpaulin manufacturing method comprising a flame retardant.

Figure 1 of the accompanying drawings showing a preferred embodiment according to the present invention is a process-specific flow chart of a waterproof fabric manufacturing method comprising a flame retardant according to the present invention.

Hereinafter, with reference to the accompanying drawings, a preferred embodiment according to the present invention will be described in detail with respect to a tarpaulin manufacturing method and a tarpaulin containing a flame retardant.

Figure 1 shows a flow chart for each process of the waterproof fabric manufacturing method comprising a flame retardant according to the present invention.

The manufacturing process 10 includes a mixing step 12 of mixing high density polyethylene (HDPE) and a flame retardant raw material, a step (14) of heating the mixture to heat and extruding it to produce a film, and a drawing operation (16); In addition, the molded film can be subdivided and divided into steps 18 for producing a yarn.

The mixing process 12 of mixing high density polyethylene (HDPE) and a flame retardant raw material is an initial process for producing yarn, and is a process of mixing the high density polyethylene (HDPE) and flame retardant raw material in an appropriate ratio and mixing them evenly. The titration ratio is 66.7 ~ 98.2% by weight of the high density polyethylene and 1.8 ~ 33.3% by weight of the deca bromine-based flame retardant (deca-BDE (bromineated Diphenyl Ether)) is mixed.

In another embodiment, 73.7 to 92.3 wt% of high density polyethylene and 7.7 to 26.3 wt% of TBBA flame retardant are mixed.

TBBA has a higher price and lower thermal stability than decabromine flame retardants. In the case of epoxy bromide, TBBA is used as a starting material, and it can be produced by flame-retardant plastics having various physical properties according to molecular weight control. However, it has a weakness in stiffness. Because it occurs insignificantly, it can be easily used even though the price is high and the thermal stability is low.

In another embodiment, 80 to 85.5% by weight of high density polyethylene, 1.8 to 6.2% by weight of a deca-based flame retardant, and 12.7 to 13.8% by weight of polypripropylene are formed by mixing molding.

Mixed molding of the polypripropylene in the high-density polyethylene film molding process increases the tensile strength by 30% than when the high-density polyethylene film is formed, and decreases the tensile strength of the tarpaulin due to the injection of particulate calpet when forming the coating layer. It is to make up for it.

Injecting a flame retardant into the process for producing dough is one of the characteristics of the present application, it was conventional to use only a flame retardant to the coating material simply by the convenience of the process, but the required level of flame retardancy for the tarpaulin Increasingly, increasing the flame retardant component added to the coating has reached its limit due to the problem of degrading the original quality of the product.

The flame retardancy is increased according to the absolute amount of flame retardant put into the tarpaulin, and the flame retardant is added to the process for producing dough to improve the overall flame retardant characteristics of the tarpaulin.

When the flame retardant added when producing the yarn is TBBA-based, the transition phenomenon is reduced because the particle size is relatively large, and when the flame retardant added is the decabromine-based flame retardant, since the particles of the flame retardant are relatively small, The transition phenomenon occurs in the gaps of the resin particles, but since the yarn is woven into the fabric and coated on both sides or selectively, the coated resin layer prevents the transition phenomenon so that the transition phenomenon does not occur in the long term. Will not.

Further, even when the amount of the flame retardant is relatively low in density compared with the amount of the base resin, it is possible to suppress the occurrence of the transition shape, and the transition phenomenon is further suppressed depending on the amount of the adhesive added. The adhesive is a viscous component and serves to prevent the decabromine-based flame retardant from seeping through large voids of the resin by viscosity, but in this application, the coated resin layer prevents the transition phenomenon and is dried by drying. There is no need for an adhesive since it prevents the transition.

The addition of a flame retardant when producing the yarn, which is a characteristic of the present application, can uniformly disperse the absolute amount of flame retardant to be added since the transition shape can be suppressed when the amount of the flame retardant is relatively low compared to the amount of the base resin. To do so.

In other words, the flame retardant property increases according to the amount of the flame retardant added to the tarpaulin, so if the flame retardant is added only to the coating part, the density of the flame retardant in the relative coating part is high, so as to prevent the transition phenomenon from increasing. It is to reduce the density at the unit position by uniformly distributing the content of the flame retardant in the constituent portion of.

The process of removing the moisture contained in the raw material is made by increasing the temperature in the process of mixing the material in the hopper by weight, stirring and mixing. If moisture is included in the raw materials, the properties of the resin may be changed or the quality of the product may be affected during mixing and melting.

The process (14) of melting and extruding the mixture by heating the mixture to produce a film involves melting an appropriate ratio of a mixture of high density polyethylene (HDPE) and a flame retardant raw material by applying heat to a cylinder in which a screw is internalized and a heater is installed, and continuous stirring is performed. The molten resin is extruded through an opening of the Ti-die shape to produce a film.

At this time, the section heated to melt the resin can be divided into cylinder, head, die subdivision, the temperature of the cylinder is 180 degrees Celsius in the first section, 190 degrees Celsius in the second section, 220 degrees Celsius in the third section, It is to maintain the temperature of 250 degrees Celsius in the fourth section.

Gradually increasing the temperature is to mix the granulated resin mixed from the hopper and to gradually increase the temperature to melt. Sudden increase in temperature, or maintaining a relatively long time at a high temperature is This is because the physical properties are changed.

The first section of the head section is heated to 220 degrees Celsius, the second section is heated to 230 degrees Celsius, the first section is heated to a temperature of 230 degrees Celsius, the second section is 250 degrees Celsius. The relatively low temperature in the head section is that the resin has already received sufficient heat, the screw rotates, the friction occurs, and the heat generated by the rotational pressure is transferred to the amount of heat that melts the raw material. The temperature rises at the end of the die section because the molten resin is exposed to the air through a narrow and narrow slit-shaped outlet, so the temperature drops rapidly and solidification proceeds rapidly in the stretching process. The reason is that it does not interfere with the process of increasing the thickness of the film.

In addition, when a rapid temperature gradient is required due to the diameter of the cylinder and the number of rotations of the screw, or the temperature gradient condition may be changed according to the resin type having different physical properties.

In the stretching process 16, the molten resin extruded from the T-die is formed in a thin plate shape, and the film thickness is determined according to the opening width of the T-Die, the speed of winding the cooled film, and the degree of cooling. If the cooling degree is reduced, the resin discharged from the T-die is increased to form a thinner film. If the opening width of the T-die is larger, the amount of resin to be discharged is larger, so that the thickness of the formed film is relatively thick. will be.

The thickness of the film is achieved by changing the above mentioned conditions as necessary.

In the process 18 of cutting the formed film to produce a yarn, a thin film having a uniform thickness in a film state is very vulnerable to external force, so that weaving is performed to prevent tearing or formation of holes due to external force. In order to form in the shape of a thread, the film formed to have a certain width is cut into small pieces to make a thread.

The weaving process (20) is a process of weaving a cloth. The thread wound on the bobbin is mounted as weft thread and inclined chamber in accordance with the specifications of the weaving, and then the weft thread is placed on the loom to the weft thread by using the force of water sprayed. It is a process of conveying and forming a cloth structure.

The fabric is formed in the shape of a cloth by using a yarn to squeeze the fabric in a tough manner so that it becomes a base material of the tarpaulin so as not to be torn or damaged by an external force.

The coating process (30) comprises a step (32) of melting and mixing low density polyethylene (LDPE) and color material, optionally one of calcareous stone and flame retardant, or a mixture of calcareous stone and flame retardant, and a step of heating dough (34). And a process 36 for coating the upper and lower surface fabric surfaces of the woven dough.

Mixing and melting low-density polyethylene (LDPE) and color materials, optionally calcareous powder or flame retardant by a constant mixing ratio, is performed because the strength and flame retardancy of tarpaulins are very important. Divided into vertical test, the test of flame retardant with horizontal tarp is referred to as horizontal test, and the test of flame retardant with vertical tarp is called vertical test, relatively flame retardant required in vertical test rather than horizontal test. The degree of need is high.

The purpose of the tarpaulin is not limited to the flooring used in the horizontal state or the vertical use, for example, the purpose of forming the tent wall, but the flame retardancy increases according to the amount of flame retardant included. It is intended to limit the features of the present application.

The process of mixing and melting low density polyethylene (LDPE) and color material, optionally calcareous powder or flame retardant, is another feature of the present application, wherein the calcareous powder used is usually formed in pellet form and the main component is weight CaCO3 85% Others 15% or CaCO3 84% by weight, TiO2 2.4%, Others 13.6 are used, Others are other additives, including antioxidants, dispersants, etc. Use what is contained.

The flame retardant used may use TBBA. In the flame retardant as a coating material, when TBBA is used, since the size of the particles is relatively large as described above, the particles exposed through the resin layer are relatively small.

In addition, it is a low-cost and calcined stone powder to increase the flame resistance, pellets or granules, or CaCO3 particles in the white powder state, the finer the particles, the better the physical properties of the tarpaulin.

If the CaCO3 particles coated on the surface are rough, the coating may protrude on the surface of the tarpaulin, which may cause a problem in the quality of the product. The larger the particle size, the lower the tensile strength of the tarpaulin. The more preferred, the particle size is preferably 5 to 30 microns in size.

The components to be mixed when melting low density polyethylene (LDPE) and color raw materials, optionally calcareous powder or flame retardant, in the process of melting 32 can be varied in each case, with particular attention being paid to the coating. Flame retardants added for the purpose should be limited to TBBA.

The reason for limiting to TBBA is that the use of decabromine-based flame retardant causes relatively large particles because the transition shape of decabromine-based flame retardant seeps into the surface of the coated resin, affecting the bonding process of the tarpaulin and the product quality. It is to limit the use to TBBA without transition phenomenon.

Details of the components added according to various embodiments are as follows.

When only the TBBA flame retardant is added, the low density polyethylene (LDPE) component is melted by mixing 80 to 90.9 weight%, color material 1.8 to 6.8 weight%, and TBBA flame retardant 7.3 to 13.3 weight%. The amount to be added increases or decreases depending on the type of color used to represent the color. The amount of the pellets containing the color dye depends on the intensity (brightness and saturation) of the color.

When only calcareous stone powder is used to improve flame resistance, the low density polyethylene (LDPE) component is melted by mixing 63.4 to 80.7% by weight of color material, 1.8 to 6.6% by weight of color material, and 17.5 to 30% by weight of calcareous stone powder. Will be done.

The calcareous stone powder is used to increase the flame retardancy. The effect of the calcareous stone powder is evenly dispersed and dispersed in the resin, and the heat that is heated from the flame during the internal combustion test because the particles of CaCO3 have a faster heat transfer rate than the resin. It is limited to one part and serves to quickly transfer to a large area without heating, which can delay the catching fire.

When calcite and flame retardant are used simultaneously to increase the flame resistance, the low density polyethylene (LDPE) component is 69.8 to 90.9 weight%, color material 1.8 to 5.8 weight%, TBBA flame retardant 7.3 to 19.4 weight%, calcareous stone 0.0 to 5% by weight of the powder is mixed to melt the coating. In this case, the most important point is that the content of the calcareous stone powder contained in the molten coating solution does not exceed 5% by weight can pass the internal combustion test.

This is because the degree of carbides generated by the flame during the internal combustion test is generated in both the calcareous stone and the flame retardant, and the amount of the sum is generated, thereby acting to sustain the flame of the tarpaulin by the generated carbides. In detail, when the calcareous stone and the flame retardant are present together, the flame resistance is reduced, so it should be extremely careful to use both types at the same time.

The combination of the above three cases is mixed and melted to coat the both sides or selectively one side on the woven dough to produce a tarpaulin.

The process of heating the dough (34) unwinds and transfers the woven dough wound on the roll, and since the pressure of water is used for weaving, the woven dough contains moisture, and heats the contained moisture to the dough. It goes through a heating step 34 to evaporate the moisture contained.

The heating step 34 is an essential step in order to proceed with the process. If the surface or the inside of the dough contains moisture, the quality of the coating is deteriorated. This is because the low-density polyethylene (LDPE) is heated through the step 34 to suppress the bleeding (transferring) of the decabromine-based flame retardant contained therein.

The process 36 for coating the upper and lower surface fabric surfaces of the woven dough is to apply the mixed molten resin in a unit unit.

At this time, the section to be heated to melt the resin can be divided into cylinder, head, die details as in the case of manufacturing film dough, the temperature of the cylinder is 180 degrees Celsius in the first section, 200 degrees Celsius in the second section, It is to maintain the temperature of 250 degrees Celsius in the third section, 280 degrees Celsius in the fourth section, and 300 degrees Celsius in the fifth section. Gradually increasing the temperature is to mix the granulated resin mixed from the hopper and to gradually increase the temperature to melt. Sudden increase in temperature, or maintaining a relatively long time at a high temperature is This is because the physical properties are changed.

In the first section of the head section, 300 degrees Celsius, the second section, 300 degrees Celsius, the first section of the die section 280 degrees Celsius, the second section 290 degrees Celsius, the third section 295 degrees Celsius, The fourth section is heated to 300 degrees Celsius, the fifth section is heated to 295 degrees Celsius, the sixth section is heated to a temperature of 290 degrees Celsius, the seventh section to 280 degrees Celsius. To give several sections in the die section is to apply the molten resin to the dough only when the molten state is good, it is to coat the surface of the mixed melt resin melted through the T-die.

It is optionally possible for the part to be coated on the dough to be almost simultaneously on both sides, or to coat one side and then coat the other side. In the case of coating both sides, the dough is moved in the vertical direction and the one side is coated and cooled, and the other side is coated and cooled, and in the case of sequentially performing the cross section, the melt is coated while the dough is moved horizontally. The resin is applied in a free-fall form.

In either case of coating both sides or sequentially coating the cross section, it can be pressed by a pair of cooling rolls or a plurality of pairs of cooling rolls with high surface roughness to obtain flatness and a homogeneous surface of the coating resin. The cooled tarpaulin is continuously wound onto the prepared roll.

Bonding process (40) is a process of bonding the coated tarpaulin wound on the roll to the required size by unscrewing the rolls, and pressing and rolling by a pair of bonding rolls heated at 500 degrees Celsius to melt and fusion And continuous bonding is made, and the bonded tarpaulin is a step of winding again by a roll (large roll) sufficient to wind the bonded width.

Cutting process (50) is a process of hanging the coated tarpaulin rolls to the winding machine and wound up to the length desired by the customer.

In the bonding process 40 and the cutting process 50, when the size required by the consumer is sufficient as a rolled product of the waterproof cloth, the bonding process is omitted and cut and shipped. When the width of the roll product of the tarpaulin is narrow, the bonding process 40 is performed.

The resulting tarpaulin continues the transportation process, which is sold to manufacturers of tents, tents and packaging materials.

The tarpaulin manufactured by the above manufacturing method was commissioned by the Korea Testing Institute. The test method is KS M 1991: 2003, and the test item is whether environmental hormones are detected. Di- ( iso-nonyl) phthalate (DINP), Di- (2-ethylhexyl) phthalate (DEHP), Butylbenzylphthalate (BBP), Dibutylphthalate (DBP), Diisodecylphthalate (DIDP), Di-n-octylphthalate (DNOP), Di- (2- Ethylhexyl) adipate (DEHA) and Diisononyl Phthalate (DINP) were not detected (detection limit: 10 mg / kg) and proved to be a product that does not contaminate the environment.

In addition, tensile strength (ASTM D 751: 2000, CRE grab method), tear strength (ASTM D 4533: 1991, trapezoid method), burst strength (ASTM D 3786: 2001, hydraulic method) In the figure (ASTM D 751, high water pressure method, ASTM D 751: 2000, 44.1.1, low water pressure method), and the degree of fire protection (CPAI 84, SECTION 5 (1995)), all of them were judged to be suitable for use as tarpaulins.

Therefore, it is possible to provide a more effective product to companies that need a tarpaulin that does not leak environmental hormones, which are currently a problem.

Although the embodiments of the present invention have been described in detail as described above, the scope of the present invention is not limited thereto, and the scope of the present invention extends to the range substantially equivalent to the embodiments of the present invention.

According to the present invention described above, by molding and molding a low-cost calpet and deca-based flame retardant material that has not been used in the past due to the disadvantages of the material has the effect of reducing the production cost, having an increased flame resistance than conventional Effective in obtaining tarpaulins.

In addition, the yellowing phenomenon and the transition (transfer) phenomenon occurring in the conventional tarpaulin does not occur by minimizing the defect rate, and has an effect of improving the productivity by facilitating the bonding operation.

Claims (11)

delete In the method for manufacturing a tarpaulin containing a flame retardant, Weaving process (10) for producing a yarn containing high density polyethylene (HDPE) and flame retardant, Weaving process of weaving yarn by weaving thread wound to bobbin according to weaving specifications and then weaving the warp yarn to the left and right by using the power of water jet (water jet) by raising the inclined chamber to the loom (20 )and, A coating process 30 for heating and drying the dough to apply low density polyethylene (LDPE) including a flame retardant to the surface of the dough; Bonding process 40 for continuously melt bonding the tarpaulin using a heated bonding roll, It includes a cutting step (50) for cutting the tarpaulin wound on the bonded large roll to the required size, Said weaving process (10) is a mixing process (12) of mixing with a high density polyethylene (HDPE) and flame retardant raw material, a process (14) of producing a film by melt-extrusion by heating the mixture to heat, and a process of stretching (16) And a flame retardant, characterized in that it is subdivided into a step (18) of cutting the molded film and producing a yarn. The method of claim 2, The mixing process (12) of mixing the high density polyethylene (HDPE) and the flame retardant raw material is a method of manufacturing a tarpaulin including a flame retardant, characterized in that the mixing of high density polyethylene 66.7 ~ 98.2 wt% and 1.8 ~ 33.3 wt% . The method of claim 2, The mixing process (12) of mixing the high density polyethylene (HDPE) and the flame retardant raw material is a method for manufacturing a tarpaulin comprising a flame retardant, characterized in that the mixture of high density polyethylene 73.7 to 92.3 wt% and 7.7 to 26.3 wt% of TBBA flame retardant. The method of claim 2, The mixing process 12 of mixing the high density polyethylene (HDPE) and the flame retardant raw material is 80 to 85.5 wt% of high density polyethylene and 1.8 to 6.2 wt% of the deca-based flame retardant and 12.7 to 13.8 wt% of poly in the high density polyethylene film forming process. Method for producing a tarpaulin comprising a flame retardant, characterized in that the pre-propylene mixed mixed molding. The method according to any one of claims 2 to 5, The coating process 30 is a low-density polyethylene (LDPE) and the color raw material, optionally calcified stone and flame retardant any one of the melting or mixing of calcite powder and flame retardant (32), and heating the dough (34) And a step (36) of coating the upper and lower surface raw units of the woven fabric. The method of claim 6, The low melting polyethylene (LDPE) component is 80 to 90.9 wt%, the color material is 1.8 to 6.8 wt%, and the TBBA flame retardant is 7.3 to 13.3 wt%. Tarpaulin manufacturing method comprising a. The method of claim 6, The low melting polyethylene (LDPE) component is 63.4-80.7% by weight, 1.8-6.6% by weight of color material, and 17.5-30% by weight of calcareous powder. Method for manufacturing a tarpaulin containing a flame retardant. The method of claim 6, In the mixing and melting process 32, the components melted by mixing are low density polyethylene (LDPE) components of 69.8 to 90.9 wt%, color raw materials of 1.8 to 5.8 wt%, TBBA flame retardant 7.3 to 19.4 wt%, calcareous stone 0.0 to Method for producing a tarpaulin comprising a flame retardant, characterized in that 5% by weight. The method of claim 6, The process of heating the dough (34) is to evaporate the moisture contained in the surface or inside of the dough to improve the coating quality, since the dough is heated, low density polyethylene (LDPE) is heated to contain the decabromine-based A method of manufacturing a tarpaulin containing a flame retardant, characterized in that the flame retardant inhibits seepage (transition phenomenon). delete

Images