KR101322043B1 - Tarpaulin and manufacturing method thereof - Google Patents

Abstract

The present invention is a fabric sheet; And a blend sheet formed on one or both surfaces of the fabric sheet and containing a polymer resin having a base resin and a number average molecular weight of 100,000 to 500,000. In the present invention, it is excellent in compatibility with the base resin, it is possible to configure the tarpaulin using a blend sheet containing a polymeric plasticizer having a specific range of number average molecular weight. Accordingly, in the present invention, it is possible to provide a tarpaulin excellent in overall durability including weather resistance, abrasion resistance, and cold resistance, etc., by preventing migration, volatilization, and elution of the plasticizer, and a manufacturing method thereof.

Fabric sheet, blend sheet, base resin, polymer plasticizer, polyvinyl chloride resin, ethylene plasticizer

Description

Tarpaulin and manufacturing method thereof

The present invention relates to a tarpaulin excellent in overall durability including weather resistance, abrasion resistance, cold resistance, and the like, since migration, volatilization and elution of the plasticizer of the present invention are prevented.

Tarpaulins are frequently used for the cover and packaging of transportation means that require movement throughout industrial facilities, such as agriculture, civil engineering, construction and leisure, the weight of the tarpaulin is required to realize more economical and easy transportation.

Accordingly, there has been a continuous demand for lighter, tarpaulin with improved properties such as durability. This demand promotes product development, and in recent years, extruded plastic products and calendar sheets using polyvinyl chloride (PVC), polypropylene (PP), polyethylene (PE) or low density polyethylene (LDPE) and the like have been widely utilized.

In addition to the method of utilizing a single sheet material as described above, from the viewpoint of improving the mechanical strength of the tarpaulin, such as extruded plastic products or calender sheets laminated to the polyester-based or nylon-based fabrics (Reinforced Coated Fabric Product) is also proposed.

Among the various tarpaulin products as described above, the most widely used is PVC tarpaulin. As an example of such a PVC tarpaulin, Korean Patent Laid-Open Publication No. 2004-76000 uses two kinds of PVC blends in which different pigments are mixed in a blend mainly containing a PVC resin, a plasticizer (phthalate plasticizer), and an inorganic substance. Disclosed is a method of making tarpaulin with speckles. In addition, Japanese Patent Application Laid-Open No. 2001-315238 is a technique that can reduce the weight per unit area while increasing the thickness of the tarpaulin, foaming process after applying a compound containing a PVC, a plasticizer, a stabilizer and a foaming agent to the substrate It is disclosed a tarpaulin to be produced via.

Existing PVC tarpaulin as disclosed in the above technology, a plasticizer, such as a phthalate system, is usually blended in a certain amount for the purpose of imparting flexibility and elasticity. However, the plasticizer has a drawback that a part or all of the plasticizer is transferred, volatilized and / or eluted in the sheet after a predetermined time has elapsed. Accordingly, the existing PVC tarpaulin is used for a long time in a special environment, when it is used in contact with or bonded to other materials, the initial characteristics are lost, or the material itself is deteriorated, thereby seriously inhibiting properties such as weather resistance, abrasion resistance, and cold resistance. Will be.

These phenomena may occur not only in PVC tarpaulin but also in tarpaulins containing plasticizers. Accordingly, the above-mentioned phenomena may be prevented for transport tarpaulins that are lightweight and have excellent overall durability such as weather resistance, abrasion resistance, and cold resistance. The demand is rising.

The present invention has been made in consideration of the above-described problems of the prior art, and provides a tarpaulin excellent in overall durability including weather resistance, cold resistance and abrasion resistance, etc., by preventing migration, volatilization and dissolution of the plasticizer, and a method of manufacturing the same. For the purpose of

The present invention as a means for solving the above problems, a fabric sheet; And a blend sheet formed on one or both surfaces of the fabric sheet and including a polymer resin having a base resin and a number average molecular weight (Mn) of 100,000 to 500,000.

In the tarpaulin of the present invention, the fabric sheet may be one or more woven or nonwoven fabrics selected from the group consisting of polyolefin-based fibers, nylon-based fibers and polyester-based fibers, wherein the fibers may have a thickness of 500 to 3,000 denier.

In addition, the base resin in the blend sheet of the tarpaulin may be at least one selected from the group consisting of polyvinyl chloride, polypropylene, polyethylene, and thermoplastic olefin resin.

The tarpaulin of the present invention may also be at least one polymer plasticizer included in the blend sheet selected from the group consisting of ethylene polymer plasticizer, acrylonitrile butadiene rubber, thermoplastic polyurethane, CSPE and CPE.

In addition, the blend sheet may include 25 to 125 parts by weight of a polymeric plasticizer based on 100 parts by weight of the base resin.

The tarpaulin of the present invention may also have a thickness of 50 to 500 μm of the blend sheet included.

The present invention as another means for solving the above problems, the first step of producing a blend sheet with a blend comprising a base resin and a polymer plasticizer having a number average molecular weight of 100,000 to 500,000; And a second step of laminating the blend sheet prepared in the first step to one or both sides of the fabric sheet.

In the method of the present invention, the second step of lamination may be performed using an adhesive or a primer, and in this case, a two-component adhesive may be used as the adhesive.

The present invention is excellent in compatibility with the base resin, characterized in that the tarpaulin is configured by using a blend sheet containing a polymeric plasticizer with an optimized number average molecular weight. Accordingly, the present invention can provide a tarpaulin excellent in overall durability including weather resistance, abrasion resistance, and cold resistance, etc., by preventing the migration of plasticizers, volatilization, and elution, and a method of manufacturing the same.

The present invention, fabric sheet; And a blend sheet formed on one or both surfaces of the fabric sheet and containing a polymer resin having a base resin and a number average molecular weight (M _n ) of 100,000 to 500,000.

Hereinafter, with reference to the accompanying drawings will be described in more detail the tarpaulin of the present invention.

1 and 2 attached show tarpaulins according to one aspect of the invention. As shown in the figure, the tarpaulin of the present invention includes a fabric sheet 1 and a blend sheet 2 as a substrate, and the blend sheet 2 may be formed on one or both sides of the fabric sheet 1. have.

The fabric sheet 1 serves to supplement the weather resistance, abrasion resistance and mechanical properties of the tarpaulin. The specific kind of the fabric sheet which can be used in the present invention is not particularly limited, and for example, a general fabric sheet such as a woven or nonwoven fabric of one or more fibers selected from the group consisting of polyolefin fibers, polyester fibers and nylon fibers. Can be used. At this time, the fiber (yarn) constituting the fabric sheet is preferably 500 to 3,000 denier (Denia) in thickness. If the thickness is less than 500 denia, the effect of supplementing mechanical properties and the like may be deteriorated. If the thickness exceeds 3,000 denia, the processability and / or handleability of tarpaulin may be deteriorated.

In the present invention, the thickness of the fabric sheet is not particularly limited, and may be usually 50 ㎛ to 500 ㎛. If the thickness is less than 50 μm, the weather resistance, abrasion resistance, and mechanical properties of the tarpaulin may be lowered. If the thickness is more than 500 μm, workability and / or handleability may be deteriorated.

The tarpaulin of the present invention also includes a blend sheet 2 formed on one or both sides of the fabric sheet 1, the sheet containing a base resin and a polymeric plasticizer. Such a blend sheet may be manufactured by a general method such as calendering, etc., using a blend including the respective components as a raw material. Examples of the base resin that can be used above include polyvinyl chloride (PVC), polypropylene, polyethylene (ex. Low density polyethylene (LDPE), high density polyethylene (HDPE), etc.), and a kind of thermoplastic olefin (TPO) resin or Heterogeneous or more can be mentioned. In the present invention, polyvinyl chloride resin is particularly preferred in terms of excellent physical properties such as electrical insulation, flame retardancy and chemical resistance, but is not limited thereto.

In the present invention, the blend sheet 2 including the base resin as described above is characterized by including a polymer plasticizer having a number average molecular weight (M _n ) of 100,000 to 500,000. The plasticizer is an additive mainly used to improve the flexibility and processability of the polymer. In particular, when a polyvinyl chloride resin is used as the base resin, an appropriate plasticizer can be used to impart excellent flexibility and elasticity to the resin. However, conventionally used plasticizers (e.g., phthalic acid-based plasticizers) have the disadvantage of being transferred, volatilized and / or eluted in the base resin. Therefore, blend sheets using conventional plasticizers lose their initial properties when used in a special environment for a long time, or when used in contact with or bonded to other materials, or by altering the material itself, such as weather resistance, abrasion resistance, and cold resistance of tarpaulin. Will seriously impede. In the present invention, a plasticizer having excellent compatibility with the base resin and stably present in the sheet, but having a large molecular weight and preventing migration, volatilization and / or dissolution phenomenon, is used. That is, the present invention is characterized by using a polymer plasticizer having a number average molecular weight (M _n ) of 100,000 to 500,000. If the number average molecular weight is less than 100,000, there is a possibility that plasticizer migration, volatilization and / or elution may occur in the sheet. If the number average molecular weight is more than 500,000, compatibility with the base resin, processability and / or handleability may decrease. There is concern.

In the present invention, as long as the number average molecular weight of the plasticizer falls within the above-mentioned range, the specific kind thereof is not particularly limited. Examples of the plasticizer that can be used in the present invention include an ethylene polymer plasticizer (ex. Elvaloy ^® Dupont (manufactured)), acrylonitrile butadiene rubber (NBR: Acrylonitrile Butadiene Rubber), thermoplastic polyurethane (TPU: Thermoplastic polyurethane), CSPE (Chlorosulphonate Polyethylene) and CPE (Chlorinate Polyethylene) may be used, and one or more of the above may be mixed and used. In particular, in the case of using a polyvinyl chloride resin as the base resin, it is preferable to use an ethylene polymer plasticizer from the viewpoint of compatibility with the resin and processability, but is not limited thereto.

Such a polymeric plasticizer is preferably included in the sheet in an amount of 25 to 125 parts by weight based on 100 parts by weight of the base resin of the present invention. If the content is less than 25 parts by weight, as the content of the low molecular weight plasticizer should be increased, there is a fear that the weather resistance, cold resistance and wear resistance of the sheet are lowered. In addition, when the content exceeds 125 parts by weight, the workability is inferior or the properties of the base resin itself such as polyvinyl chloride resin may be deteriorated.

In addition to the above components, the blend sheet of the present invention may further contain a low molecular weight plasticizer such as a phthalic acid plasticizer (eg, DOP (dioctyl phthalate), DIDP (diisodecyl phthalate) and / or DINP (diisononyl phthalate), etc.); Inorganic fillers (eg silica, aluminum hydroxide, calcium carbonate, barium sulfate, talc, alumina and / or mica, etc.); Organic or inorganic pigments (diluents); Heat stabilizers; Ultraviolet stabilizers; It may further comprise one or more additives selected from the group consisting of flame retardants, antistatic agents and the like. At this time, the content of the component included is not particularly limited and may be appropriately selected within a range that does not harm the purpose of the invention.

It is preferable that the blend sheet of this invention containing the above components is 50-500 micrometers in thickness. When the said thickness is less than 50 micrometers, there exists a possibility that workability and / or abrasion resistance may fall, and when it exceeds 500 micrometers, there exists a possibility that workability and / or handleability may fall.

The present invention also includes a first step of preparing a blend sheet with a blend comprising a base resin and a polymer plasticizer having a number average molecular weight of 100,000 to 500,000; And

It relates to a method for producing tarpaulin comprising the second step of laminating the blend sheet prepared in the first step to one side or both sides of the fabric sheet.

The first step of the invention is to prepare a blend sheet using a blend comprising a base resin and a polymeric plasticizer. In this case, the type and amount of the base resin and the polymer plasticizer are the same as described above, and the blend may further include the above-described additional additives. The method for producing a sheet using such a compound is not particularly limited, and for example, a general method such as calendar processing can be applied.

The second step of the present invention is the step of laminating the blend sheet prepared in the first step on one side or both sides of the fabric sheet. At this time, the method of laminating the blend sheet is not particularly limited, and may be laminated with, for example, an adhesive or a primer. Examples of the adhesive that can be used at this time include one or more general adhesives selected from the group consisting of PVC sol, melamine, epoxy, rubber, acrylic, ester and urethane. In the present invention, in particular, it is preferable to use a two-part adhesive in view of easy adhesion with a plastic sheet and preventing reactivation by high temperature heat after processing, but depending on the conditions of use, the lamination is performed using a one-part adhesive. You may also do it.

Tarpaulin of the present invention prepared by the above method is excellent in physical properties such as weather resistance, cold resistance and abrasion resistance, it can be effectively used for the cover and / or packaging of transportation means (ex. Trucks, trains, ships, etc.). .

Hereinafter, the present invention will be described in more detail through examples according to the present invention and comparative examples not according to the present invention, but the scope of the present invention is not limited to the examples given below.

Example  One

100 phr PVC resin (LS100, LG Chem) 100 phr, polymer plasticizer (Elvaloy 741, dupont) 100 phr, low molecular plasticizer (DOP, LG Chem) 10 phr and filler 10 phr To produce a PVC blend sheet. Subsequently, a tarpaulin was prepared by laminating the PVC blend sheet prepared above using an adhesive on both sides of a polyester-based fabric sheet woven with 1,000 denier yarn. At this time, the adhesive was used after adjusting the viscosity of the formulation containing 100 phr of PVC resin (LS090, LG Chem) and 80 phr of plasticizer (DOP, LG Chem) to 2,000 cps.

Comparative Example  One

Example 1, except that 100 phr of PVC resin (LS100, LG Chem) was used, 60 phr of low molecular plasticizer (DOP, LG Chem) was used, and 10 phr of a filler was used to prepare the PVC blend sheet. Tarpaulin was prepared by the same method as described above.

The tarpaulins of Example 1 and Comparative Example 1 prepared as described above were measured for weather resistance, abrasion resistance and cold resistance, respectively, by the methods given below.

1. Weather resistance measurement

Weather resistance was measured according to the method specified in ASTM G 153 (weather-O-meter test). Specifically, after four cycles of heating to 60 ° C., water spraying, drying, and UV irradiation, the state of the specimens was measured after a predetermined time.

2. Wear resistance measurement

Abrasion resistance was measured according to the method defined in ASTM G 3389. Specifically, three specimens of a shape having a diameter of about 120 mm or a test-free shape were prepared using tarpaulins prepared in Examples and Comparative Examples. Subsequently, a hole having a diameter of about 6 mm was drilled in the center of the specimen, fixed to the rotating plate, and rotated, and the degree of wear by the wearer (H-18, 1000 g) was confirmed.

3. Cold resistance measurement

Cold resistance was measured according to the method specified in ASTM D 2136. Specifically, after making three specimens of 25 mm × 120 mm size, using a cold crack test facility, put them in a low temperature oven with a bending machine after 30 minutes at a certain temperature, through a bending test The degree of cracking was checked and measured as specified.

[Table 1]

Example 1 Comparative Example 1 Weatherability No significant changes were observed in the specimen until after 8,000 Hrs. Severe changes such as cracking and discoloration due to plasticizer transition after 2,000 Hrs Wear resistance 30mg / 100cycle wt loss 60mg / 100cycle wt loss Cold resistance Cold resistance up to -40 ℃ Cold resistance up to -35 ℃

As can be seen from Table 1, in the weather resistance test, in Examples according to the present invention, no significant change was observed in the specimen until 8,000 hours had elapsed. Serious changes such as cracking and discoloration occurred.

In addition, in the wear resistance test, the weight loss of 30 mg occurred in 100 cycles in the example according to the present invention, whereas the weight loss of 60 mg occurred in the same cycle in the comparative example.

Finally, in the cold resistance test, an embodiment of the present invention realized cold resistance at a temperature of -40 ° C, while a comparative example realized cold resistance at -35 ° C.

Through these results, it can be confirmed that Example 1 of the present invention in which the ethylene-based polymer plasticizer is blended with the PVC base resin is superior in overall durability such as excellent weather resistance, abrasion resistance, and cold resistance compared to the tarpaulin of Comparative Example 1.

1 and 2 are cross-sectional views showing the structure of tarpaulin according to an aspect of the present invention.

≪ Description of reference numerals &

1: fabric sheet

2: blend sheet

Claims (13)

Woven or nonwoven fabric sheets made of one or more fibers selected from the group consisting of polyolefin fibers, polyester fibers and nylon fibers; A blend sheet formed on one or both surfaces of the fabric sheet and containing a base resin, an ethylene-based polymer plasticizer having a number average molecular weight of 100,000 to 500,000, and a phthalic acid-based low molecular weight plasticizer; And An adhesive containing at least one resin selected from the group consisting of PVC sol, melamine, epoxy, rubber, acrylic, ester and urethane and phthalic acid based low molecular weight plasticizers, Tarpaulin, characterized in that the adhesive for laminating the blend sheet and the fabric sheet. delete The method of claim 1, Tarpaulin, characterized in that the thickness of the fiber 500 to 3,000 denier. The method of claim 1, Tarpaulin, characterized in that the fabric sheet is 50 to 500 ㎛ thickness. The method of claim 1, Tarpaulin, wherein the base resin is polyvinyl chloride. delete The method of claim 1, The tarpaulin, characterized in that the blend sheet contains 25 to 125 parts by weight of an ethylene polymer plasticizer with respect to 100 parts by weight of the base resin. The method of claim 1, Tarpaulin, characterized in that the blend sheet further comprises at least one selected from the group consisting of plasticizers, inorganic fillers, pigments, heat stabilizers, ultraviolet stabilizers, flame retardants and antistatic agents. The method of claim 1, Tarpaulin, characterized in that the blend sheet is 50 to 500 ㎛ thickness. A first step of preparing a blend sheet from a blend comprising a base resin, an ethylene polymer plasticizer having a number average molecular weight of 100,000 to 500,000, and a phthalic acid low molecular weight plasticizer; And A second step of laminating the blend sheet prepared in the first step to one or both sides of the fabric sheet, The fabric sheet is a woven or non-woven fabric made of one or more fibers selected from the group consisting of polyolefin fibers, polyester fibers and nylon fibers, In the second step, the blend sheet is laminated on the fabric sheet using an adhesive containing at least one resin selected from the group consisting of PVC sol, melamine, epoxy, rubber, acrylic, ester and urethane and phthalic acid based low molecular weight plasticizers. Method for producing tarpaulin. delete delete delete

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