TW200410874A - Covering material for welding, jointed structure, welding procedure, welded article and composite article - Google Patents

Abstract

The invention provides a covering material for welding which can inhibit the permeation of chemical liquid through the joint of sheets, is excellent in weld reliability, and does not cause leakage; and a welding procedure which comprises applying the covering material on base material. The covering material for welding in accordance with the present invention consists of a modified polytetrafluoroethylene resin (A) and the covering material for welding is positioned on the joint portion of a resin base material composed of polytetrafluoroethylene resin (B) for carrying out welding operation by covering the joint portion of the resin base material. The modified polytetrafluoroethylene resin (A) is formed of tetrafluoroethylene and a minor monomer.

Description

200410874 〇). Description of the invention [Technical field to which the invention belongs] The present invention relates to welding coating materials, joining structures, welding construction methods, welding construction objects and composite objects. [Prior art] Products that require corrosion resistance, such as can bodies and piping materials made of metal, are lined with resins that have chemical resistance and solvent resistance. Inner loops are traditionally required to have low permeability to the liquid, and are not based on the coating but on the liner. Liners are made of thin sheet materials that cover the inner walls of tanks and pipes. As a thin plate material, a fluorine-containing resin is generally used. Among them, polytetrafluoroethylene (PTFE) resin has significantly less metal and less dissolved metal, so it is suitable for semiconductors with high requirements for low dustiness. Sheet material of the relevant container. The backing plate must be welded to the connecting part of the sheet. As a welding method, it is considered that the connecting parts are overlapped by sheets, and the overlapping parts are hot-pressed up and down. However, it is difficult to adhere the sheets formed of the homopolymer of tetrafluoroethylene (TFE homopolymer) to each other. Problem. In order to join the sheets, a method of using a modified polytetrafluoroethylene [denatured PTFE] resin on at least one side of the sheet is proposed (for example, refer to Japanese Patent Publication No. 56-36064). As a method for fusing PTFE sheets, PTFE sheets are used. A method of fusing a tetrafluoroethylene / perfluoro (alkyl vinyl) ether copolymer [PFA] film (for example, refer to JP 5 2-6 3 2 7 4 (2) 200410874 Gazette and JP 52 — Gazette No. 63275.) etc. However, any of the above methods is a method of heating fusion, heating the entire fusion part, which increases the welding time and reduces the productivity. In addition, if one side of the lining sheet of the tank body and piping material is connected to the inner wall of the tank pipe material or the like, pressure is applied to both sides of the sheet to cause a problem. As a method of joining the sheets, consider bevel cutting (Beve 1) to fit the two ends of the sheet at the connecting part, and the welding rod formed by the bevel cutting part of PFA, and the obtained sheet is bonded to the part, as in PFA A method of forming a welded coating material to reinforce the knot. In the method of using a welding coating material formed by PFA, although a PTFE polymer is used as a sheet, in order to obtain a stable connection between the bonding portion of the sheet and the welding coating material, a primer (prinier) formed by PFA in the welding portion in advance ) Method (for example, Japanese Patent Publication No. 5 9 — 1 2 04 1 7; Japanese Patent Publication No. 5 7 — 1 63 5 24; Japanese Patent Publication No. 5 7 — 1 42 246; Japanese Patent Application No. 5 9 — 3 3 3 3 No. 1 is also being implemented now. However, the method of using the primer coating is difficult to control the disadvantages of uneven coating thickness and reduced welding reliability. In addition, the primer is customized and the surfactant is used, especially the exposure In the case of chemicals with strong oxidizing power used in semiconductors, there are disadvantages due to surfactants. The method of using a welding coating material formed of PFA is to press the sheet joint portion and the welding coating material, However, at this time, the necessary problem body and distribution do not match the cutting. The embedding is known by thermal fusion, but there are special reports and special reports.) Degrees, because the security industry has become a dusty integration. From the welding -6-(3) (3) 200410874, the boundary part between the coating material and the sheet exuded the molten welding coating material, and there was a problem of forming the exudation part. The exuded part is caused by the fact that it is not pressurized during the welding process and cracks with crystallization shrinkage when it is cooled after welding. In particular, when lining the tank body and piping materials of the semiconductor industry and the like, there is a problem that foreign matter adhering to the above-mentioned exudation part becomes dust. Although the exudation of the boundary portion between the sheet and the welding coating material must be cut off, there is a possibility that the sheet may be damaged. When the sheet is damaged, the 'boundary part has almost no ductility when concentrated stress is applied. When performing the flange processing, etc., voids are prone to occur due to the extension of the welding boundary part, and chemical leakage occurs. The problem of passing through the gap. In recent years, as a resin base material, it has been developed to have a higher specific gravity than the traditional ones. Although it has been found that the permeability of the medicinal solution has been reduced to some extent, with the increase in the density and density of semiconductor circuits, a high degree of The cleanliness is also to avoid the problem of corrosion of the inner wall of the tank body and piping materials or the metal dissolution of the lining material, and gradually requires a high degree of low permeability of the chemical liquid. SUMMARY OF THE INVENTION The present invention is based on the above-mentioned current situation, and provides a small amount of liquid permeation at the bonding portion of the sheet, and provides a welding coating material that has excellent welding properties and does not bleed out. Welding construction method. The present invention is a welding coating material formed of a modified polytetrafluoroethylene resin (A). The above-mentioned welding coating material is placed on a joint portion of a resin base material formed of a polytetrafluoroethylene resin (B). Welding for Quilt (4) 200410874

I For the joint part of the above-mentioned resin base material, the above-mentioned modified polytetrafluoroethylene resin (A) is a welding coating material characterized by a combination of tetrafluoroethylene and trace monomers. The present invention is a joint structure formed by a joint portion of a resin base material formed of a polytetrafluoroethylene resin (B) and the above-mentioned welding coating material, and the above-mentioned Welding coating materials, and those obtained by welding, the above-mentioned modified polytetrafluoroethylene resin (A) is a joint structure characterized by the formation of tetraethylbenzene and trace monomers. The present invention is a welding construction article characterized by having the above-mentioned joint structure. The present invention is a welding construction method in which the above welding coating material is placed on a joint portion of a resin base material formed of polytetrafluoroethylene resin (B), and the welding coating material is modified by the above A welding construction method characterized by the formation of polytetrafluoroethylene resin (A). [Summary of the Invention] The invention is described in detail below. The welding coating material of the present invention is formed of a modified polytetrafluoroethylene resin (A). The above-mentioned modified polytetrafluoroethylene resin (A) is formed by tetrafluoroethylene [TFE] and a trace monomer. That is, the above-mentioned modified polytetraethylene resin (A) is a resin formed from a copolymer of TFE and a trace monomer. (5) (5) 200410874 The above-mentioned micro-monomer system provides a micro-copolymer without providing a degree of melt fluidity to the obtained copolymer. As the above-mentioned minute single system, as long as it can be copolymerized with TFE and does not impart melt fluidity to the obtained copolymer, it is not limited, and examples thereof include perfluoroalkenes such as hexafluoropropylene [HFP]; chlorination; Chlorinated fluorinated olefins such as trifluoroethylene; hydrogenated fluorinated olefins such as trifluoroethylene; perfluoroethylene ethers, etc. The perfluorovinyl ether is not particularly limited, and examples thereof include perfluoro unsaturated compounds represented by the following general formula CF2 = CF-ORf (where Rf represents a perfluoroorganic group). In the present specification, the above-mentioned "perfluoroorganic group" means an organic group in which all hydrogen atoms bonded to carbon atoms are replaced by fluorine atoms. The above-mentioned perfluoroorganic group may have ether oxygen. As the above-mentioned perfluorinated vinyl ether, for example, in the above general formula, Rf represents a perfluoro (alkyl vinyl) ether [PAVE] which represents a perfluoroalkyl group having 1 to 10 carbon atoms. The carbon number of the above-mentioned perfluoroalkyl group is preferably from 1 to 6. Examples of the perfluoroalkyl group in the PAVE include perfluoromethyl, perfluoroethyl, perfluoropropyl, perfluorobutyl, perfluoropentyl, and perfluorohexyl. The perfluoro / propyl group is suitable. . The above micro-single system is preferably PAVE and / or HFP. Winter (6) (6) 200410874 The above-mentioned modified polytetrafluoroethylene resin (A) is a trace monomer unit derived from the above-mentioned trace monomer. The unit of 0.05 to 0.7% by mass of the copolymer formed by the TFE and the above-mentioned trace monomer is: should. If the content is less than 0.05% by mass, the weldability between the obtained welding coating material and a resin base material described later may be deteriorated. If it exceeds 0.7% by mass, the specific gravity of the welding-covered portion described later tends to decrease, and the permeability of the chemical solution may increase. In the present specification, 'the above-mentioned micromonomer unit refers to a part of the polymer molecular structure of the above-mentioned modified polytetrafluoroethylene resin (A), which is derived from the part of the aforementioned micromonomer. For the aforementioned modified polytetrafluoroethylene resin (A), for example, copolymers having different molecular weight distributions and copolymerization compositions, such as one or two or more, may be used. The average number of the copolymers of the above-mentioned modified polytetrafluoroethylene resin (A) is the amount of the micro-monomer unit in the above-mentioned range, and the melt viscosity is specified in the range described later, that is, i χ丨 〇8 to 15 xi 〇8 pa • s is usually in the range of 200,000 to 20 million. When the number average molecular weight is within the above range, the mechanical strength of the welded coating portion in the joint structure to be described later will be good. A better lower limit is 1.8 million, and a better lower limit is 63 million. The polymerization method for obtaining the above-mentioned modified polytetrafluoroethylene resin (A) is not particularly limited, and conventionally known polymerization methods such as emulsion polymerization and suspension polymerization may be mentioned. The above welding coating material is a powder obtained by pulverizing and granulating the above modified polytetrafluoroethylene resin (A) which has been polymerized as required. Molding and compression-10- (7) (7) 200410874 Molding and other conventionally known molding methods can also be obtained by cutting the molded product. The melt viscosity of the aforementioned welding coating material is preferably 1 X 1 08 to 15 X 108 Pa · s. When the melt viscosity is within the above-mentioned range, although it is somewhat deformed during welding and pressurization, it is possible to suppress the formation of an exudation portion described later. In order to obtain a welding coating material having a melt viscosity within the above range, as the above-mentioned modified polytetrafluoroethylene resin (A), one having a melt viscosity within the above range is usually used. The above-mentioned melt viscosity 7 is measured using a dynamic viscoelasticity measuring device (trade name: PDS-II, manufactured by Rheometric). The welding coating material of the present invention is placed on the joint portion of the resin base material, and is welded to cover the joint portion of the resin base material. The above-mentioned welding coating material has a shape that can cover a resin base material bonding portion described later, and it is sufficient as long as it has a sufficient thickness to reduce the permeability of the chemical liquid, and usually has a shape such as a knot, a short rod, and a band. In the present specification, the so-called resin base material refers to a resin molded article on which the above-mentioned welding coating material is placed on a joint portion to be coated. The above-mentioned resin base material is a part or all of which is covered by the above-mentioned welding coating material and has an appropriate size. There is no limitation that the thickness and size are not greater than the above-mentioned welding coating material. The shape of the above-mentioned resin base material is not particularly limited, and examples thereof include a block shape and a sheet shape. Of these, a sheet shape is preferred, and a backing base material is particularly preferred. The above-mentioned backing base material is a sheet-like resin base material which can be used as an inner lining material for covering a substrate. The above-mentioned lining material is contained in the lining board. According to the coating -11-(8) (8) 200410874, the above-mentioned base material can play a role of protecting the above-mentioned base material, for example, imparting starvation resistance and improving mechanical strength, and imparting non-stick The effect of improving the surface properties of the substrate and the effect of improving the surface smoothness of the substrate and the appearance of the substrate. The above-mentioned substrate is not particularly limited, but it is generally preferable or required to exert the function of the above-mentioned lining material. Examples of the material include stainless steel, copper, aluminum, bronze, zinc, brass, and titanium. Metal; glass, etc. The above-mentioned backing base material can be used without cutting the resin molded product, but it is generally manufactured by cutting a large-scale block-shaped resin molded product. The above-mentioned backing base material may be a heat-resistant non-woven fabric or heat-resistant woven fabric that is subjected to an appropriate surface treatment 'or laminated glass cloth because it is attached to the above-mentioned substrate. The above-mentioned backing base material is made of polytetrafluoroethylene resin (B). Although the above polytetrafluoroethylene resin (B) can be polymerized by tfe only and 1% = tetraoxyethylene homopolymer [TFE homopolymer] resin, it can also be formed by Ding Fe and the above-mentioned trace monomers. Modified polytetrafluoroethylene resin (B 丨), but when welding the welding coating material formed by the above modified polytetrafluoroethylene resin (A), modified polytetrafluoroethylene resin can be used from the viewpoint of not using a primer. A fluoroethylene resin (B1) is preferable. The aforementioned modified polytetrafluoroethylene resin (B 1) is the same modified polytetrafluoroethylene resin as the modified polytetrafluoroethylene resin (A), but from the viewpoint of using the above-mentioned resin base material, It is different from the above modified polytetrafluoroethylene resin (A) used in the above welding coating materials. The copolymer of the above-mentioned modified polytetrafluoroethylene resin (B1) is -12- (9) (9) 200410874 of the trace monomer and the trace monomer of the copolymer of the modified polytetrafluoroethylene resin (A). The ratio of the bulk unit, the molecular weight cloth, and the like may be the same or different #, but from the viewpoint of bonding properties, it is preferable that they are substantially the same. The above; ^ resin base material may be formed by additives other than resin components. The resin component described in L is preferably the above-mentioned polytetrafluoroethylene resin (B), or may be only the above-mentioned polytetrafluoroethylene resin (B). In the present specification, the above-mentioned "joint portion of the resin base material" refers to a portion of the resin base material formed by joining edges and edges. In the present specification, the above-mentioned "joint" refers to the state of being adhered to each other or at least to the extent that they cannot be separated without being mechanically cut. The above-mentioned "joining" is usually the above-mentioned resin base material, and the welding auxiliary material described later to be used in accordance with the need, and the joining or its state is based on fusion. The joining part of the above resin base material can be directly joined by fitting the same or different resin base materials having the same shape or size to each other. Under pressure, the resin base material is placed in the fusion of polytetrafluoroethylene resin (B). If the above resin base materials are joined to each other at a temperature above the point, the same shape, size, etc., or the same phase of the Vi base material may be used to mount the resin base materials to each other, and the welding rod or the shape of the contacting material through the welding auxiliary material described later. Material, which indirectly joins the aforementioned resin base materials with each other. The joining part of the resin base material on ice can also be embedded for cutting the two resin base materials obliquely. · The concave part generated by this is filled with welding rod .. About tf 撩 rod As described later. The joining part of the above resin base material is, for example, "both ends of a sheet-like resin base material such as 撩 steam 丨 Gamma lining buckle material, etc." also u g 丨 g: 丨 inspection 丨 丨 W Questioner. The above resin-13- (10) (10) 200410874 The joint part of the base material is usually a part of the above-mentioned resin base material, because the above-mentioned resin base material is the object to be covered by placing the welding coating material as described above. 'So when the resin base material is the same size as the above-mentioned welding coating material', it also means the entire resin base material. In the present specification, the above-mentioned "placement on the joint portion" means that the welding coating material is placed on the joint portion of the resin base material. When the above-mentioned resin base material is formed by the above-mentioned TFE homopolymer resin, the above-mentioned resin base material and the welding coating material are necessary through a primer layer described later, but if the above-mentioned resin base material is used as a reason When the modified polytetrafluoroethylene resin (B i) is formed, it has excellent compatibility with the modified polytetrafluoroethylene resin (A) in the welding coating material, so it is not necessary to pass through the primer. In this specification, the above-mentioned "welding" refers to the fusion of the joint portion of the above-mentioned resin base material with the above-mentioned welding coating material. In this specification, the above-mentioned "welding" refers to the fusion of the interface between the base material of the fusion tree and the above-mentioned welding coating material, and the "joining" in the joint portion of the resin base material is the fusion as described above. From the viewpoint of resin base materials of the same or different shapes or sizes, the two are different ideas. The bonding structure of the present invention is formed by the welding coating material formed of the above-mentioned modified polytetrafluoroethylene resin (A), and the bonding portion of the resin base material formed by the above-mentioned polytetrafluoroethylene resin (B). , The one obtained by placing the above-mentioned welding coating material on the joint portion of the above-mentioned resin base material and performing welding. The above-mentioned joint structure is formed by the welding coating portion of the welding coating material and the resin base material portion described later from the resin base material. -14- (11) 200410874 In this manual, the above-mentioned "weld coating part" refers to the upper welding structure, the part from the welding coating material after welding is performed, and the above welding coating part is based on the welder's basis The addition during welding can change the degree of crystallization before heating, etc. 'It can also be different from the welding coating material of those who are not welded from the viewpoint of the result ratio. In this specification, the so-called "Resin base material part" refers to the part of the joint structure that includes the part affected by heating during welding since the resin base material has been subjected to this welding. The above-mentioned resin base material, because it includes the part affected by heating during welding, is at least included in the above-mentioned welding coating part, because it comes from the part of the base metal after welding, so it exists in the above welding coating part The lower part of the base material in the horizontal direction comes from the part sandwiched in the vertical direction between the welding surface and the inside of the welding coating material. The above-mentioned resin base material part is changed by the welder, according to the heat during welding, the degree of crystallization before heating can be changed for this purpose, and it can also be changed from the point of view of the person who has not changed the weight. Material is different. The denatured polytetrafluoroethylene resin (A) is as described above, and it is preferable that the above-mentioned trace monomer units derived from the microparticles are 0.05 to 0.7% by mass of a copolymer of TFE and the above-mentioned trace monomers. The joint structure of the present invention is on the way of requiring a high low permeability of the chemical solution. The modified polytetrafluoroethylene resin (A) is the one in which the above-mentioned micro unit is a copolymer formed by TFE and the above-mentioned trace monomer. Serving. Hot, re-thinking the above, the amount of the amount of the amount of fruit resin containing the resin added to the amount of the form of the amount of 0.05 -15- (12) (12) 200410874 to 0.5% by mass It is preferable that the specific gravity of the welding coating portion is 2. 14 5 to 2.210. In the above-mentioned modified polytetrafluoroethylene resin (A), when the above-mentioned trace monomer unit is from 0.05 to 0.5% by mass of a copolymer formed by TFE and the above-mentioned trace monomer, the welding coating portion can be increased. The specific gravity of the portion is 2.145 to 2.210. When the specific gravity is within the above-mentioned range, the bonded structure of the present invention has a highly low chemical liquid permeability. The specific gravity of the above-mentioned welded coating portion is a sample cut out in accordance with JIS K 7 1 3 7-2 and the radon obtained is measured in accordance with JIS K 7 1 12 — A (substitution method in water). However, the specific gravity refers to a case where the resin base material is formed of a heat-resistant nonwoven fabric or a heat-resistant nonwoven fabric such as laminated glass cloth, and is measured after the heat-resistant nonwoven fabric or heat-resistant nonwoven fabric is peeled off. When the joint structure of the present invention is obtained, the melt viscosity of the welding coating material (0 is as described above lxlO8 to 15xl08Pa.s is appropriate (condition ①), and the above melt viscosity (a) is the melt viscosity of the resin base material (B) The following 値 (Condition ②) is preferable. The welding coating material used in the joint structure of the present invention is formed of a modified polytetrafluoroethylene resin (A), and the melt viscosity of the welding coating material used is Those who satisfy the above conditions ① and ② can have excellent welding reliability. In order to have the welding reliability of the joint structure of the present invention, and to ensure low permeability of the chemical solution, the above-mentioned welding coating portion and If the crystallinity of the resin base material portion is increased, it is better to increase the specific gravity. With the welding reliability mentioned above, the entire surface of the joint surface of the welding coating material and the resin base material is fused. High-reflection-16- (13) 200410874 In the presence of responsive gas, etc., the above-mentioned chemical liquid and gas will penetrate through the gap between the welded part and the resin base material. The melt viscosity is because It is generally considered that there is no change before and after welding, and the above conditions ① or conditions ① and conditions ② are satisfied before welding. The melt viscosity of the welded coating part and the resin base It is confirmed by the melt viscosity. Therefore, the joint structure of the present invention has a melt viscosity of 1 × 10 to 8 × 10 Pa

• S is better. The melt viscosity of the welded coating part is within the above range, and it is more preferably below the melt viscosity of the resin base material part. The polytetrafluoroethylene resin (B) used to obtain the resin base material used in the bonding structure of the present invention is preferably a modified polytetrafluoroethylene resin (B 1) formed by the TFE and a trace monomer as described above. . When the joint structure of the present invention uses a modified polytetrafluoroethylene resin (B 1) as the resin base material, the resin base material and the welding coating material can have sufficient bonding properties without using a primer. In this specification, the so-called "primer coating" refers to the welding auxiliary material used to improve the bonding between the tree base material and the welding coating part, and it is in the form of a dispersion (dispersi ο η) when used. By. The above-mentioned primer is formed of a perfluororesin (C). The above-mentioned primer is generally a dispersion liquid in which particles ′ formed of the above-mentioned perfluororesin (C) are dispersed in water, an organic medium, or a mixture of water and an organic medium, and are dispersed and stabilized according to a surfactant or the like. The perfluororesin (C) mentioned above has a melt viscosity of 1 X 1 05 P a · s or less, as long as all hydrogen atoms bonded to carbon atoms are replaced by fluorine atoms -17- (14) (14) 200410874 polymerization The resin formed by the biomolecules is sufficient, and a perfluoroalkene resin is preferable. In the present specification, the above-mentioned "perfluoroalkene resin" refers to a resin formed by at least one kind of perfluoroalkene and a polymer obtained by polymerizing P A V E in accordance with a desired polymerization. The above-mentioned perfluoroolefin resin is not particularly limited, and examples thereof include a resin formed by a TFE / HFP copolymer and a resin formed by a TFE / PAVE copolymer. The joint structure of the present invention is preferably one in which a primer is not used between the resin base material and the welding coating material. If the bonding structure of the present invention does not use a primer, there is no risk that the surfactant contained in the primer is carbonized when it is exposed to a strong oxidizing chemical and a source of dust is generated. In this specification, the above-mentioned "no primer is used between the resin base material and the welding coating material" means that when the resin base material and the welding coating material are used to obtain the joint structure of the present invention, the above-mentioned resin base material and the above-mentioned No primer is present anywhere between the welding coating materials. Between the base material and the welding coating material mentioned above, the primer coating is used to place the welding coating material on the upper surface of the joining part including (I) the resin base material, and the primer coating is applied, and ( π) The surface of the welding coating material to be placed on the joint portion of the resin base material is coated with a primer. The joining part of the resin base material is cut and fitted with two beveled surfaces of the resin base material as described later. When the concave portion is generated and the welding rod is formed, the above-mentioned (I) is included in the inclined surface. The surface of the base material that is cut into two welded bases to be filled with welding rods is coated with a primer ((-18- (15) (15) 200410874-1)) and the resin obtained by performing the above filling welding rods. In the joint portion of the base material, a welding coating material is placed on the upper surface, and a primer ((I) -1 2) is applied. The above "((ϊ) -1 2)" becomes a placing welding coating material on the surface. The "face" may include the part from the filled welding rod, which becomes the surface on which the welding coating material is placed, and the surface of the resin base material that does not adhere to the welding rod and melts and solidifies according to the filling, which becomes the placement welding. The covering material is on the upper surface. In the joint structure of the present invention, the resin base material before welding is preferably the above-mentioned lining base material. When it is a lining base material, the above-mentioned joining structure is low as described above. Those with excellent chemical liquid permeability are suitable for lining materials. The joint structure of the Ming may be one with no exudation. The so-called "exudation" refers to the joining of the welding coating material and the resin base material during the welding and pressure melting of the welding coating material. Exudation occurs between parts. The above-mentioned exudation part is caused by the exudation of the resin melted by heating from the intended outline of the resin molded product after heating and melting, and includes what is generally called "exudation part" or The common thoughts of “overrunners.” The joint structure mentioned above uses denatured polytetrafluoroethylene resin (A) as the welding coating material, because the exudation part is difficult to occur even when welding, so it is not necessary to carry out the traditional cause. Exudation must be removed. If removal is not required, there is no risk of damage to the joint structure, so there is no need to worry about cracks. The above removal is generally performed with a V-shaped chisel, etc. Equipment, cutting, etc. The welding construction method of the present invention is to form the above-mentioned modified polytetrafluoroethylene tree-19- (16) 200410874 grease (A) The welding coating material is placed on the joint portion of the resin base material formed by the above-mentioned polytetrafluoroethylene resin (B), and is formed by welding. The so-called "denatured polytetrafluoroethylene resin (A)" , "Welding coating material", "polytetrafluoroethylene resin (B)", "joining part of resin base material", "mounting of joining part" and "welding" are as described above.

In the welding construction method of the present invention, the joining portion of the above-mentioned resin base material is formed by cutting and cutting two resin base materials obliquely, and the resulting concave portion is formed by filling the welding rod with: should.

The above welding rod is in the above concave portion, that is, there is the above-mentioned two resin base materials, which is mainly a welding subsidy material used to join the above-mentioned two resin base materials. The heating in the concave part is solid. The above-mentioned welding rod is not only required to join the two resin base materials mentioned above, but it is usually required to be joined to the welding coating material placed on the filling part. The above-mentioned welding rods are used in the field of welding resin molded articles, and are generally considered to be welding rods. The welding rod is formed of a perfluororesin (D), and the above-mentioned perfluororesin (D) is preferably one having a melt viscosity of 1 x 105 p a · s or less. The upper limit of $ Gu Rong viscosity is preferably 0.4 × 10 5 Pa · s. The above-mentioned perfluororesin (D) is a resin formed by polymer molecules in which all hydrogen atoms bonded to carbon atoms are replaced by atoms, and a perfluoroalkene resin is preferable. The perfluoroalkene resin is the same as the perfluororesin (C) described above. -20-(17) (17) 200410874 There is no particular limitation on the above perfluoroalkene resin, and examples thereof include TFE / HFP Resin formed by copolymer and resin formed by tfe / PAVE copolymer. From the viewpoint of the resin used in the welding rod, the above-mentioned all-fluorine resin (C) is different from the resin used in the primer coating between the resin base material and the welding coating material. . The molecular weight distribution and monomer type of the polymer in the above-mentioned perfluororesin (D) may be the same as or different from those of the above-mentioned perfluororesin (C). Fill the concave part of the above welding rod, while heating the above welding rod at a welding temperature of 460 to 550 ° C, while applying a welding speed of 70 to 200 rnm / min, apply 0.3 to 2.5 Mp The pressure of a is appropriate. The welding temperature to be used is changed due to the air volume or welding speed. For example, the upper limit of the above welding temperature is 55 (TC, when the welding speed is less than 70 mm / min.) 'Polytetrafluoroethylene resin (B) constituting the resin base material, and modified polytetrafluoroethylene resin (A) constituting the welding coating material. ) Are likely to decompose. Therefore, 'the above-mentioned welding temperature, welding speed and pressure are preferably carried out under the conditions within the above range. The above-mentioned welding base of the resin base material is filled with the above-mentioned welding rod in a concave state. Part, the part overflowing from the bevel cutting is a raised part (projecting part) after cooling, which may cause obstacles when welding the coating material. Therefore, the joint part of the above resin base material is carved. A flat chisel or the like may be obtained by chiseling the raised portions. In the welding construction method of the present invention, the above-mentioned resin base material is preferably a lining base material. The welding construction method of the present invention is using a lining base material. When the material is the resin base material of the aforementioned -21- (18) 200410874, it is suitable from the viewpoint that the obtained joint structure can achieve high permeability. The resin base material of the welding construction method of the present invention is the base material of the backing plate Time The above welding is performed on the joining surface of the above-mentioned material's joining part and the welding coating material. While heating to 620 ° C, it is applied at a welding speed of 30 to 140 mm / min to 2.5Mpa. The above-mentioned resin base material is formed of the same or different shapes and sizes, and other than the base material of the backing plate, such as a block, the above-mentioned welding is based on the above-mentioned resin. The joining surface of the covering material of the base material is heated to 520 to 6200 ° C, and the pressure is preferably 5 Mpa. The cooling after welding can improve the resin in the obtained joint. The degree of crystallinity of the base metal part and the welding coating part is particularly preferable from the viewpoint of reducing the permeability of the chemical liquid, and it is preferably carried out by slow cooling and air cooling. The properties of the welding coating material used in the welding construction method of the present invention The polytetrafluoroethylene resin (A) is as described above, and it is preferable that the unit of the trace monomer derived from the trace single is 0.05 to 0.7% by mass of the product formed by the TFE and the trace monomer. In the use, change Polytetramethylene resin (A) is preferably from 0.05 to 0.5 of the copolymer formed from the above-mentioned trace monomer unit and the above-mentioned trace monomer from the trace monomer. The welding construction method of the present invention is suitable. The low chemical solution of the resin base material used is that the above-mentioned resin base is 5 2 0 i. The molding and welding of the resin of 0 · 3 is 0.3 to increase the structure ratio. The polyfluoroethylene fired on the variant is TFE mass% Specific gravity is -22- (19) (19) 200410874 It is suitable to be 2.175 to 2.200. When the specific gravity is within the above range, the specific gravity of the base metal of the tree B after welding is easily increased, and it is easy to control the penetration of the chemical liquid When the above-mentioned modified polytetrafluoroethylene resin of the base material (the micro-early body unit in the copolymer of Bu is more than 0.5% by mass of the copolymer formed by the TFE and the above-mentioned trace monomers, , The specific gravity is easily under 21.5. In the welding construction method of the present invention, the trace monomer in the modified polytetrafluoroethylene resin (A) used in the welding coating material and the trace monomer in the modified polytetrafluoroethylene resin (B 丨) used in the resin base material. The system is as described above, preferably PAVE and / or HFP. The welding coating material used in the welding construction method of the present invention has the above-mentioned ① melt viscosity (from 0 to 15x; 10pa · s and "other" ② The above-mentioned melt viscosity (a) is from resin熔融 (Condition ②) below the base material's melt viscosity (b) is appropriate. If the melt viscosity meets the conditions ① and ② above, it will be a welding construction with welding reliability. The above welding coating materials are based on As described above, it is preferable that the above-mentioned resin base material is placed on the joint portion of the above-mentioned resin base material without using a primer. The above-mentioned primer is formed by the above-mentioned perfluororesin (C). The fluororesin (C) has a melt viscosity of i x 105 Pa · s or less. The above welding construction method is because the welding coating material formed by the above-mentioned modified polytetrafluoroethylene fine resin (A) is used, and the welding system does not bleed out. According to the welding construction method of the present invention, the weldability between the welded coating part and the resin base material part of -23- (20) 200410874 can be improved, and the resulting joint structure or corrosion resistance can be improved. In addition, the welding construction method of the present invention additionally connects the proportion of the coating portion and the resin base material portion. Although the resin base material has a high specific gravity in recent years, it is not only a high specific gravity resin base material, but also has a low level of low chemical liquid permeability. One of the joint structure inventions obtained in accordance with the welding construction method described above is a joint formed by a resin base material joining part and a welding coating material. The welding construction object of the present invention has the above joining structure and the above joining structure is as described above. , Formed by the welding part of the welding coating material, the above welding construction objects are obtained by welding with the welding coating material. The above-mentioned work objects are the above-mentioned joint structures, and the above-mentioned resin mother is the above-mentioned. The part other than the resin base material of the joint structure. The above-mentioned resin base material is as described above, and the degree of influence of the heating on the above-mentioned resin base material is small, and it becomes the resin base of the joint structure. Material itself, in this case, the above-mentioned object is the above-mentioned joint structure itself. The welding construction object of the present invention is the above A resin base material is preferred. In the present specification, the above-mentioned "resin base material is a construction material that is too dry-lined" is called a "welding lining material." The welding lining material described in this description does not include a substrate. The composite object of the present invention is an object covered with the construction object of the welding lining material mentioned above, and for example, the durability of the covering lining board base material object can be improved, and the welding structure that can be gradually developed and realized can also be the creator. The structure of the resin mother in the welding material of the resin mother is as a whole in the book of welding to the above-mentioned welding construction as the base material of the lining mother board. The superior welder is as above -24- (21) (21) 200410874, etc. The size of the above-mentioned composite object is not particularly limited, and it may be used in a factory scale or in a laboratory scale. As the above-mentioned composite article, there is no particular limitation, and examples thereof include materials for chemically-reversed parts such as containers, buckets, tanks, towers, piping materials, connectors, and stirring wings. As the above-mentioned composite object, the above-mentioned base material and the above-mentioned welding construction object can be closely adhered, although the above-mentioned base material can be simply connected to the above-mentioned welding construction object and can be easily separated, it is advisable to adhere the above-mentioned 〇 The above-mentioned composite object is all or part of one side of the above-mentioned base material, or all or part of both sides of the above-mentioned base material, and is covered by the above-mentioned welding construction object. When the above-mentioned composite object is formed by the base material of the lining board, at least the surface of the base material should preferably play the role of the above-mentioned lining material. . There is no particular limitation on the use of the above-mentioned composite object, and examples thereof include a chlorine exposure device that is corrosive or oxidizing when dry chlorine and wet chlorine coexist in the food electrolysis industry, etc. 3 absorption tower; strong oxidizing, rubber or FRP can not be used for a long time to make hydrogen peroxide, hypochlorous acid, sulfuric acid, nitric acid, hydrochloric acid and hydrofluoric acid and other inorganic acid device; storage or transportation of semiconductor surface treatment and washing Among the semiconductor devices used for chemical liquids such as hydrofluoric acid, etc., are preferably used for manufacturing semiconductor devices. Among the composite articles of the present invention, as the "users used in the manufacture of semiconductor devices", for example, piping parts materials for connecting a chemical solution such as hydrofluoric acid, etc.-25- (22) 200410874, the above-mentioned piping material connection part materials, and Zhenning_ etc. Best Modes for Implementing the Invention The following are examples, and in more detail, B # is not limited to these examples. [Embodiment] Example Example 1 As a raw material for the welding coating material, the basis for use is: denatured PTFE resin powder obtained by polymerization (melt viscosity • s, standard specific gravity is 2.1 4 5). 20 mass parts of stone name IsoparE (manufactured by Exxon Chemical Co., Ltd.) were added to 100 mass P T F E resin powder and mixed, and the content was:. The petroleum-based solvent is dried and removed at 100 to 200 ° C and fired for 1 to 10 minutes to obtain a welding coating material. The proportion obtained was 2.1 4 9. Spray the TFE / PAVE copolymer with hot air at 4 80 ° C and gradually apply 0.3 to 1 2 5 mm on the above-mentioned tree-cut recessed portion 23 in the model cross-section of Figure 2. The welding speed per minute is such that the welding base material obtained from the resin base material is placed on the joint portion of the resin base material, as shown in the mold of FIG. 3, and is invented with a component material such as a barrel of 580 ° C, but The emulsification degree shown in Table 1 of the present invention is 1 3 X 1 08 Pa. The above-mentioned variable oil-based solvent (commercial line is extruded and molded, and the base material of the welding coating material is forged at 3 70 ° C. The welding rods formed by side cutting have a pressure of 0.5Mpa. They are sprayed with hot air 3 3 as shown in the sectional view. • 26- (23) 200410874 At the position shown in 34, gradually apply 0.3 to 0.5Mpa. The welding speed is 1 2 5mm / min, and the welding direction is 35. Then, regarding the obtained joint structure, perform the evaluation of the elongation and tensile strength of the welded part as described below. As shown in the sectional view of the upper model, cut out the width formed by welding the coated parts 1 1 and 12 as On the base resin part of the sample obtained with a length of 10mm and a length of 100mm, the elongation of the welded part marked with the following formula is set every 40mm (%) = [丨 The mark at the maximum extension f (mm) — 40 mm } / 4 0 mm] And measure the elongation of the welded part, and also determine the tensile strength. Welding state is good. Welding part of the elongation and tensile strength of the welded part. Observe that there is no fusion in the cross section of the joint structure. The state of being unreliable ... The elongation and tensile strength of the welded part are different according to the sample. Observe that the cross section of the joint structure is unfused. Cannot be welded ... The elongation and tensile strength of the welded part are almost It is found that the cross section of the joint structure has an unfused state. The pressure is based on the structure surface and the mold resin base material sample. The point is based on the small difference between the distance X 1 00 and the unstrength. No, Guan-27- (24) 200410874 The proportion of the welded coating part and the welding edge part is shown in the model cross-section of Figure 2. The welded coating part imitates a part of the resin base metal part of the welding edge. Part 22, cut out the sample for deep gravity measurement according to 7 137-2 According to JIS κ 71 1 of water specific gravity measurement method substituted). However, the specific gravity of the glass cloth back sheet is after the glass cloth is peeled off. Example 2 As a raw material for the welding coating material, a PTFE resin powder as shown in the table is used. A metal mold is filled with the above raw materials, and a pre-molded product is obtained after being pressurized, and the pre-molded product is subjected to cutting processing after 370 t hours to obtain a welding coating material. The specific gravity of the obtained covering material was 2.195. This welding coating material was welded to the resin base material under the welding conditions as shown in the table, and the obtained welded structure was evaluated in the same manner as in Example 1. Example 3 As a raw material of the welding coating material, p T F E resin powder shown in Table 1 was used. The above raw materials are filled in a metal mold, and a pre-molded product is obtained after pressing. The pre-molded product is cut for 3 7: 0 hours to obtain a welding coating material. The specific gravity of the obtained covering material was 2.152. This welding coating material was welded to the resin base material under the welding conditions as shown in the table, and the obtained welded structure was evaluated in the same manner as in Example 1. Bu 21 and JIS K 2-A (determined. Modified 30 Mp a 10 burned 10 productions shown in the welding, denatured 30 M pa 10 burned 10 productions shown in the welding 1, -28- 200410874 (^; >) Royal Green Example 4 is a raw material for welding coating materials, which uses denatured M: ·: resin powder as shown in Table 1. The above raw materials are filled in a metal mold and pressurized at 30 MPa to obtain pre-molding. The pre-molded product was calcined at 37 ° t for 10 hours, and then subjected to cutting processing to obtain a welding coating material. The proportion of the obtained welding coating material was 2.1 3 9. The welding coating material is as shown in the table. The welding conditions shown in 1'are welded with the resin base material, and the structure is connected on the evening, and the same evaluation as in Example 1 is performed. Example 5 is used as the raw material of the material to be read. It is used. The denatured iw: resin powder as shown in the table. Fill the metal model with the above raw materials, add UK at 30Mpa to obtain a pre-molded product, and then calcinate the pre-molded product at 37 ° C for 10 hours. The cutting coating is applied to obtain the welding coating material. The proportion of the obtained welding coating material is 2.1 3 7. This welding The covering material was welded to the resin base material under the welding conditions shown in Table 1. The obtained welded structure was evaluated in the same manner as in Example 1. Comparative Example 1 As shown in Table 1, the raw materials for the covering material were used. Tetrafluoroethane-can homopolymer [TFE homopolymer] powder. The above raw materials are filled in a metal mold and pressed at 30 MPa to obtain a pre-molded product. The pre-molded product is calcined at 37 ° C. 1 After 0 hours, the cutting material was added by cutting: Γ to obtain a covering material. The specific gravity of the obtained covering material was 2. 1 6. 5. Although this coating material was tried as -29- (26) 200410874

Welding conditions as shown in Table 1, can not be welded. As a raw material for the coating material, TFE / all as shown in Comparative Example 2 was used as a fluorine (alkyl) vinyl ether copolymer [PFA] powder. The upper powder "A powder" was extruded using a screw extruder to obtain a coating material. The specific gravity of the covering material was 2.14. Except that the coating material and the base material were welded at 48 ° ', welding was performed under the welding conditions shown in Table 1, and the obtained joint was evaluated in the same manner as in Example 1. The characteristics and welding conditions of the above (welding) coating materials are shown in Table 1, and the evaluation results of welding conditions are shown in Tables 2 to 8. The following resin base materials are used in Tables 2 to 8. Table 2 ... Sheets obtained from denatured tetrafluoroethylene resin (I) Table 3 ... Sheets of glass cloth back sheet obtained from denatured tetrafluoroethylene resin (I) Table 4 ... Sheets obtained from TFE homopolymer resin (Π) 5 ... Sheet of glass cloth back sheet obtained from TFE homopolymer resin (Π) Table 6 ... Sheet of sheet made of denatured tetrafluoroethylene resin (K) Table 7 ... Sheet of glass cloth made of denatured tetrafluoroethylene resin (m) Plate sheet -30- (27) 200410874 Table 1 Example 1 Example 2 Example 3 Example 4 Example 5 Comparative example 1 Comparative example 2 Type of welding coating material denatured PTFE (1st volume monomer: PAVE resin) TFE all Polymer PEA standard specific gravity. 2.145 2.168 2J68 2.180 2.180 2.150 Melt viscosity 380 ° C (Pa · s) According to viscoelasticity measurement method 13 × 108 6.5xl〇8 6.5xl08 1.0x1 〇8 l.OxlO8 20xl08 2x10 'PAVE denaturation (mass% ) 0.08 0.08 0.12 0.40 0.65 0 3.8 (Welding) Specific gravity of coating material 2.149 2.195 2.152 2.139 2.137 2.165 2.140 Welding conditions Welding speed (mm / min) 10-20 70 to 90 10-20 90 to 120 Welding nozzle temperature (° c) 580 480 Pressing pressure (MPa) 0.3 to 0.5 Do not coated reinforcing material to weld size (mm) 2x14 2.4x14 2x14 2.4x14 2.4x14

-31-(28) (28) 200410874 Table 2 Resin base material modified polytetrafluoroethylene resin (I) sheet Specific gravity 2.195 Melt viscosity 6.5xI08Pa-s Example] Example 2 Example 3 Example 4 Example 5 Comparative example 1 Comparative Example 2 Welding state Unreliable Welding is good Welding is not good Welding is good Welding edge part No exudation part Exudation part Wet exudation part treatment Crack evaluation tensile strength (kgf / cm) 0-35.0 56.0 56.8 58.0 54.0 54.0 54.0 Estimated elongation of welded part (%) 0 to 40 120 190 170 172 20 to 65 Π0 Proportion of welded covered part 2.150 2.206 2.160 2.145 2.137 2.138 2.138 Specific gravity around welding 2.160 2.185 2.180 2.176 2.175 2.170 2.170 -32-(29) (29) 200410874 Table 3 Specific gravity of the resin base material modified polytetrafluoroethylene resin (I) glass cloth back sheet sheet 2.185 Melt viscosity 6.5xl08Pa · s Example 1 Example 2 Example 3 Example 4 Example 5 Comparative Example] Comparative Example 2 Welding status is not reliable Welding is good Not welding is good Good welding Welding edge part without exudation part Exudation part contact exudation part treatment Do not implement non-implementation edge part good appearance-cutting damage exudation partial crack evaluation tensile strength (kgf / cin) 0-35.0 56.0 56.8 58.0 54.0 54.0 54.0 Estimated elongation of welded part (%) 0 to 20 45 43 46 45 20 to 4 5 48 Proportion of welded covered part 2.150 2.208 2.160 2.145 2.137 2.139 2.139 Proportion of welded surrounding part 2.160 2.180 2.176 2.171 2.170 2.165 2.165 -33- (30) (30) 200410874 Table 4 Resin base material TFE Homopolymer resin (II) Sheet specific gravity 2.180 Melt viscosity 20xl08Pa · s Example 1 Example 2 Example 3 Example 4 Example 5 Comparative example 1 Comparison Example 2 Welding status: Welding is good. Welding is not good. Welding is good. There is no seepage at the welding edge. There is no seepage at the β part. Do not implement the untreated edge part. Good appearance-cutting damage seepage. Strength (kgf / cm) 51.0 52.0 55.0 56.0 55.0 53.0 53.0 Estimated elongation of the welded part (%) 52 5 0 52 50 55 20 to 55 60 Specific gravity of welded coating 2.150 2.202 2.160 2.145 2.137 2.138 2.138 Specific gravity of welded surrounding 2.160 2.170 2.173 2.170 2.169 2.160 2.160 -34- (31) (31) 200410874 Table 5 Resin base material TFE homopolymerization Physical resin (II) glass cloth back sheet sheet specific gravity 2.170 Melt viscosity 13xl08Pa · s Example 1 Example 2 Example 3 Example 4 Example 5 Comparative example] Comparative example 2 Welding state is good Welding cannot be welded Welding good welding edge No exudation part Exudation part Exudation part treatment Do not implement non-implementation Edge part good appearance-Cutting damage Exudation Partial crack Evaluation tensile strength (lcgf / cm) 51.0 56.0 56.8 58.0 54.0 54.0 54.0 Estimated welding Partial elongation (%) 100 120 170 180 182 20 to 65 160 Specific gravity of welded coating part 2.152 2.200 2.162 2.146 2.138 2.139 2.139 Specific gravity of welded peripheral part 2.157 2.160 2.162 2.161 2.158 2.155 2.155-35- (32) 200410874 Table 6 Resin Base material denatured tetrafluoroethylene resin (III) sheet Specific gravity 2.170 Melt viscosity 13xl08Pa · s Example 1 Example 2 Example 3 Example 4 Example 5 Comparative example 1 Comparative example 2 Welding condition evaluation Welding condition Welding is good Welding is not good Welding is good Welding edge part No exudation part Exudation part Exudation part Treatment Do not implement The appearance of the edge part is good-the tensile strength of the cutting damage and the exudation of the crack (kgf / cm) 51.0 56.0 56.8 58.0 54.0 54.0 54.0 Welded part elongation (%) 100 120 170 180 182 20 ~ 65 160 Specific gravity of the welded coating part 2.152 2.200 2.162 2.146 2.138 2.139 2.139 Specific gravity around the welding 2.157 2.160 2.162 2.16] 2.158 2.155 2.155

-36- (33) 200410874

Resin base material denatured tetrafluoroethylene resin (II) glass cloth back sheet sheet specific gravity 2.160 Melt viscosity 13xl08Pa · s Example 1 Example 2 Example 3 Example 4 Example 5 Comparative example 1 Comparative example 2 Welding status evaluation Welding status welding Good Welding is not good Welding Good welding Welding edge part No exudation part Exudation part Exudation part treatment Do not implement Not implement edge part Good appearance-Cutting damage Exudation part Crack tensile strength (kgf / cm) 54.0 56.0 56.8 58.0 54.0 54.0 54.0 Elongation of welded part (%) 43 45 43 46 45 20 ～ 45 48 Proportion of welded cover 2.145 2.180 2.159 2.145 2.140 2.138 2.138 Proportion of welded surrounding part 2.150 2.153 2.155 2.156 2.154 2.150 2.150

From the above table, it can be seen that in Examples 1 to 5 using denatured PTFE resin as the (welding) coating material, no exudation occurred, but Comparative Example 2 using PFA as the (welding) coating material, it is known that The exudation part 51 shown in Fig. 5 even hurts the welding edge part 52 of the (resin) base material when it is removed. In addition, it was found that the modified PTFE resin having a lower melt viscosity than -37-(34) 200410874 (resin) base material was used in Examples 2 to 5 of Table 2 (welding), and the TFE homopolymer was used as the coating material raw material. Comparative Example 1 or PFA (Comparative Example 2 of the welding material) was compared with 'Welding conditions are good. Reference Example 1 Chemical liquid exposure test of a container using a primer coating using a polytetrafluoroethylene resin with a thickness of 3 mm And, using PFA used in Comparative Example 2 as an interlayer primer (the p FA obtained by emulsification polymerization will be dispersed and stabilized with an agent or the like), and a joint is obtained in the same manner as in Comparative Example 2. The obtained joint was exposed to sulfur at a temperature of 12 ° C for 2 months. Observation 4 using a scanning electron microscope [Sem] showed that the boundary between the base material portion and the covered portion was obtained. Based on the SEM image, when the volume of the boundary part of the volume between the base material part and the coating part of the dust meter 1 m 1 is used, the number of dusts with a diameter of 0.2 μm or more is 15 per ml and In the same manner as in Example 1, the elongation and tensile strength of the welded part were measured. Compared with the strength before the exposure, the tensile strength of the welded part is reduced by 35% and the spread is also reduced by 35. Then, as a result of elemental analysis using a mass spectrometer, it can be seen that the fluorine content has been reduced to that of the normal part. Less than 50%. The original material (welding) of the covering material is the covering material. When the acid and ozone are welded under the interface active conditions, dust is generated as shown in the figure, and the average particle size is observed. In addition, the time is 20% or more. Black part of the black pass-38- 200410874 (35) Normal part (%) Black part (%) Fluorine content 76 14 Carbon content 24 43 It is inferred from the above results that the dust observed by SEM is contained in The surface active agent in the base coating is free from floating foreign matter due to carbonization.

INDUSTRIAL APPLICABILITY The welding coating material and welding construction method of the present invention are formed by the above-mentioned structure, so that after welding, it can provide less penetration of chemical liquid in the joint portion of the resin base material, excellent welding reliability, and no occurrence. Welding construction objects with seepage. Brief description of the drawing: I1 is the top view of the model of the sample for measuring the welding strength and ductility | and the cross-section of the model. 11 2 is a model cross-sectional view showing a sampling portion for measuring a specific gravity sample. Fig. 3 is a model sectional view showing a welding step. FIG. 4 is an S EM image of a welding portion in Reference Example 1. FIG. Figure 5 is a model sectional view of the exudation part and the welding edge part. -39-(36) (36) 200410874 Explanation of Symbols 1 1 Welding and coating part 1 2 Resin base material part 2 1 Welding and coating part (for measuring specific gravity) 2 2 Welding peripheral part 2 3 Bevel cutting of concave part Parts 3 1 Welding coating material 3 2 Resin base material 3 3 Hot air 34 Pressurizing 3 5 Welding direction 5 1 Exudation part 5 2 Welding edge part -40

Claims (1)

(1) (1) 200410874 Welding coating material formed of resin (A) with patent application scope 'The welding coating material is placed on the joint portion of the resin base material formed of polytetrafluoroethylene resin (B) 'Welding and coating the joint part of the resin base material: The modified polytetrafluoroethylene resin (A) is formed by tetrafluoroethylene and a small amount of monomer. 2. As the welding coating material in the scope of the patent application, the denatured polytetrafluoroethylene resin (A) is a trace monomer unit derived from a trace monomer, which is a copolymer of tetrafluoroethylene and the trace monomer. 〇5 to 〇 knife mass%. 3. If the welding covering material of item i or item 2 of the scope of patent application, there is a trace amount of single system perfluoro (alkyl vinyl) ether and / or hexafluoropropylene. 4. The welding coating material according to any one of the scope of application patents No. 丨 to No. 3, wherein the melt viscosity is lx108 to 15x108 ρ & s. 5. The welding coating material according to any one of claims 1 to 4 of the scope of patent application, wherein the resin base material is a backing base material. 6 · A joint structure characterized by a welded coating material formed of a modified polytetrafluoroethylene resin (A) and a joint portion of a resin base material formed of a polytetrafluoroethylene resin (B) The joint structure is obtained by placing the welding coating material on the joint portion of the resin base material and performing welding. The modified polytetrafluoroethylene resin (A) is made of tetrafluoroethylene and trace monomers. Former. 7 • The joint structure according to item 6 of the patent application, wherein denatured poly-41-(2) (2) 200410874 Tetrafluoroethane resin (A) is a trace monomer unit derived from trace monomers. 0.05 to 0.7 mass% of the copolymer formed by the trace monomer. 8 · If the joint structure of the 6th or 7th in the scope of the application for a patent, a trace amount of a single system perfluoro (alkyl vinyl) ether and / or hexafluoropropylene. 9 · The joint structure according to any one of items 6 to 8 in the scope of the patent application, wherein the welding coating material has a melt viscosity (a) of 1 χ 丨 〇8 to 1 5 X 1 08Pa · s 〇10 The joint structure according to item 9 of the application, wherein the melt viscosity (a) is equal to or lower than the melt viscosity (b) of the resin base material. 1 1 · The bonding structure according to any one of claims 6 to i 0, wherein the polytetrafluoroethylene resin (B) is a modified polytetrafluoroethylene formed from tetrafluoroethylene and a trace monomer. The resin (B 1), the joint structure is between the resin base material and the welding coating material, and the primer is not used. The primer is formed by perfluoro / resin (C), and the perfluoro resin (匸) Is one with a melt viscosity of lxl05Pa · s or less. 1 2. The joint structure according to any one of claims 6 to n in the scope of patent application, in which there is no exudation. 1 3 · If the joint structure of any one of the 6th or 8th to 12th of the scope of the application for a patent, wherein the modified polytetrafluoroethylene resin (A) is a trace monomer unit derived from a trace monomer, the unit is four When the copolymer formed from fluoroethylene and the trace monomer is from 0.05 to 0.5% by mass, the proportion of the welded coating portion from the welded coating material is 2.1 4 5 to 2.2 1 0. 1 4 · If the joint of any one of items 6 to 13 of the scope of patent application is applied -42-(3) 200410874 Structure ′ wherein the resin base material is the backing base material. 1 ·· A welding construction method, characterized in that a welding coating material formed of denatured polytetrafluoroethylene resin (A) is placed on a resin base material formed of polytetrafluoroethylene resin (B) A welding construction method in which the joint portion is welded. The modified polytetrafluoroethylene resin (A) is formed by tetrafluoroethylene and a trace monomer. 16. The welding construction method according to item 15 of the scope of patent application, wherein the denatured polytetrafluoroethylene resin (A) is a trace monomer derived from a trace monomer. The unit is a copolymer formed by tetrafluoroethylene and the trace monomer. 〇 05 to ο]% by mass. 1 7 • If the welding application method of item 15 or item 16 of the scope of application for patents is' in which a trace amount of single system perfluoro (alkyl vinyl) ether and / or hexafluoropropylene-43- (4) (4) 200410874 Walker. 2 〇. Welding construction method according to any one of the scope of the application of the patent No. 丨 5 to 丨 9, wherein the resin base material is a lining board base material, and the welding is the joining part of the resin base material and the welding The bonding surface is heated at 5 2 to 6200 ° C while applying a pressure of 0 3 to 2.5 Mpa at a welding speed of 30 to 14 mm / min. 2 1 · If the welding construction method of item 15 or item 17 to item 20 of the scope of patent application 'wherein the proportion of resin base material is 2.175 to 2.200' denatured polytetrafluoroethylene resin (a ) Is a micromonomer unit derived from a micromonomer in an amount of 0.05 to 0.5% by mass of a copolymer formed by tetrafluoroethylene and the micromonomer. 2 2 · If the welding construction method of any one of the items 15 to 21 of the scope of the application for a patent, wherein the welding is not exuded. 2 3. The welding construction method according to any one of items 15 to 22 in the scope of patent application, wherein the polytetrafluoroethylene resin (B) is a modified polytetrafluoroethylene formed from tetrafluoroethylene and a trace amount of monomer Vinyl resin (B 丨), the welding coating material is based on the resin base material, and does not use a primer, but is placed on the joint portion of the resin base material, the primer is formed of perfluoro resin (C) 'The perfluororesin (C) has a melt viscosity of 1 X 1 0 5 P a · s or less. 24 · —A joint structure characterized in that the joint structure formed by the joint portion of the resin base material and the welding coating material is based on the welding of any one of the items 15 to 23 of the scope of patent application Winner of construction method. 25. A welding construction object, characterized in that it has a joint structure according to any one of the items 6 to 14 or 24 in the scope of application patent -44-(5) 200410874. 2 6 · If the welding construction object in item 25 of the patent application scope, it is the welding lining material. 2 7 · ~ composite objects characterized in that they are formed by a base material and a welding construction object such as the scope of the patent application No. 25 or No. 26. 2 8 · If the composite object in the scope of patent application No. 27, it is a container 'bucket, tank, tower, piping materials, connectors or mixing wings. 29. The composite article of item 28 of the patent application park, which is used for manufacturing semiconductor devices. -45-