TWI305790B - Process for the welding of two polyamide parts - Google Patents

Description

1305790 Α7 Β7 V. INSTRUCTION DESCRIPTION (i) The present invention relates to a method of welding two polyamidide parts, both of which consist of a polyamidamine composition comprising a polyamine and a self-selectable additive (please read the back first) Precautions can be completed by filling in this page. The invention further relates to polyamine fusion articles made by the process, such as corrugated tubes, bellows, vessels, fuel inlet systems, air inlet manifolds and ducts. In W 0 9 8 / 1 1 1 6 4, it is described that the two polyamide components can be welded together by vibration welding. Of the two polyamine parts, the polyamide component is the same. Printed by the Ministry of Economic Affairs, the Department of Intelligence and Finance, and the Consumers' Cooperatives. The inventors have found that 'a polyamide-melting article consists of two kinds of polyamine parts that are welded together, which can achieve quite practical advantages, both of which are The softening temperature of one of the components (component L) consisting of one polyamine and a polyamine composition with a self-selectable additive is lower than the other component (component Η). The softening temperature here and below means the melting temperature of the crystalline polymer or the glass transition temperature of the amorphous phase polymer. An advantage of such a different polyamide fused article is that the overall properties of the article can be further optimized in the article using different polyamide materials where different material properties are desired. For example, in an internal combustion engine under capping applications, both extreme high temperature resistance and high flexibility requirements exist simultaneously, and a heat resistant polyamide (which requires heat resistance) can be used with a flexible polyamide (requires flexibility but not The heat resistance is required to be welded together to constitute the object. The object can perform better and/or can be cheaper. However, it is generally believed that in order to obtain a sufficient strength of fusion, the polyamines in the two components to be welded must be the same. The main reason is that different polyamines will show adverse interaction and adhesion. For vibration welding, the paper wave scale is applicable to China National Standard (CNS) Α4 specification (210>< 297 mm) Bureau Xiaogong Consumer Cooperative Printed 1305790 A7 B7 V. INSTRUCTIONS (2) The higher molten parts do not melt or hardly melt, and the stomach cannot be fully welded. SUMMARY OF THE INVENTION An object of the present invention is to provide a method of welding two polyamidide parts, one of which (part L) has a lower polyamine softening temperature than the other part (component Η). The polyamine composition of part L comprises one or more viscosity-increasing additives such that the melt shear viscosity of the polyamide composition is at least 30% higher than the melt shear viscosity of the polyamide (according to I SO 1 1 4 4 3 (A 1 ), measured in a capillary rheometer at a shear rate of 100 si, 1 / d = 30 mm / 1 mm), can achieve the object according to the invention. As for measuring the degree of increase in melt shear viscosity, as long as the viscosity of both the polyamide and the polyamide composition is added and compared at the same temperature, the precise temperature measured is not very severe. However, it is preferred to measure the melt shear viscosity at the general standard melt processing temperature of the polyamine, in particular, the polyamido-6 is measured at 260 t, and the polyamine is 6,6 to 2. Measurement at 80 °C. Surprisingly, it has been found that an acceptable weld strength can be obtained by the method of the present invention as described in the experiments. From the viewpoint of obtaining a better weld strength by the method of the present invention, the polyamine composition of the component L is 10 〇s -1 , and the melt shear viscosity is improved by at least 50%, preferably at least 70%. At least 100% is best. In particular, in polyamine-6 and polyamine-6,6, it has been found that the melt shear viscosity of the polyamine composition of the part L can be at least 200 P if a good weld strength can be obtained by the process of the invention. a · s , at least 2 5 〇Pa · s is preferred, at least 300 Pa.s is best. This paper size applies to the Chinese National Standard (CNS) A4 specification (210X297 mm) (please read the notes on the back and fill out this page)

-5- 1305790 A7 B7 V. INSTRUCTIONS (3) It has been found that high molecular weight polyamines can also be used to obtain good fusion strength. High molecular weight polyamines are considered to have a relative solution viscosity of at least 2.4. The amine solution is determined by a solution of 1 g / 1 〇〇m 1 in 90% formic acid at a temperature of 25 ° C. For molded parts, at least 2.4. The relative solution viscosity is high because such viscosity is usually only used for fibers, films or blow molding, except that the molded portion L achieves good weld strength by using fibers, films or blow molding grades. Accordingly, in a preferred embodiment, the present invention relates to a method of welding a polyamide component wherein the softening temperature of the polyamide of one of the components (component L) is lower than the temperature of the other component (component Η), wherein the component L The polyamide composition comprises a high molecular weight polyamine and/or a viscosity enhancing additive, and the polyamine composition of component L has a melt shear viscosity of at least 200 Pa.s, preferably at least 300 Pa.s. Polyamine composition including relative solution viscosity of 2 · Between 0 and 4, in particular, polyamines between 2.4 and 4, and viscosity-increasing additives. Relative viscosity of the solution above 2 results in better weldability, however, due to processability, The relative solution viscosity is preferably less than 4. As explained above, a relative solution viscosity higher than 2.4 provides better weld strength. The composition of the high molecular weight polyamine and the additive has a significant unexpected improvement, which is considered to be the free end. Generally, the higher molecular weight polyamine requires less chain extender to produce a stable polymer, and the original more end groups will make the interaction between the polyamine and other components. Preferably, polyamines are usually used in each linear molecule. 1 to 1 amine group is used as the standard for this paper. National Standard (CNS>A4 (2丨0X297 mm) (please read the back first) Note on this page)

*1T Ministry of Economic Affairs Intellectual Property Bureau Consumer Cooperatives Printed 6· 1305790 A7 B7 V. Inventive Note (4) End group; the amine group content is preferably at least 20 m e q / k g, and at least 4 0 m e q / k g is optimal. The advantage of a higher amine group content is a greater increase in viscosity' and the non-Newtonian melt flow caused by the anhydride group reaction in the branching agent is more pronounced. In particular, any group of similar polyamines can be selected to combine the original properties such as high temperature resistance and flexibility. Such polyamine compositions are, for example, 'polyamine-6-polyamide-6,6: polyamido-4,6, polyamine 6,6/polyamine 4,6, polydecylamine 4,6/semi-aromatic polyamines, etc. Preferably, the softening temperature of the polyamide of the component 高于 is higher than 280 ° C, and the softening temperature of the polyamine of the component L is less than 270. (:) Heat resistance is usually accompanied by rigidity and low flexibility, but high flexibility is often accompanied by low heat resistance. A part of the softening temperature of the softening temperature is higher than 280 m and a part of the softening temperature is lower than 270 °C. The combination has the advantage of combining high heat resistance and flexibility. A preferred example of a polyamine having a softening temperature of more than 280 ° C is selected from the group consisting of polyamine-4,6 and semi-aromatic (co)polymerization. Indoleamines, such as polyglycolamine (6,6. 6,Τ / 6,I), polyamine (6, Τ / 4 ' Τ ). These polyamines have good thermal stability and mechanical properties. In the best case, the polyamide of the component 为 is polyamine-4,6. Polyamine-4'6 is a well-known polyamine in engineering plastics for high temperature applications and polyamine-4,6 It is a widely used polyamide which is easy to obtain, moderately priced, and has good flexibility. The polyamine of part L having a softening temperature of less than 270 °C is selected from the group consisting of aliphatic polyamines. 6,6, Polyamide-6, Polyamide-4, ¥ paper scale applicable to China's home standard (CNS) eight 4 specifications (2] 〇 >< 297 mm) ~~ ~~ (Please read the note on the back and then fill out this page) C· -Subsidiary Ministry of Economic Affairs Intellectual Property Bureau 8 Workers Consumption Cooperative Printed 1305790 A7 B7 V. Invention Description (5) 1 〇, Polyamide - 4,1 2 copolymer with such polyamines. Preferably, the polyamine is selected from the group consisting of polyamido-6 or polyamido-6 / 6,6 copolymer. Softening temperature is higher than 2 80 ° C The preferred combination of polyamine and polyamine having a softening temperature of less than 2 7 ° C is a combination of polyamine 4,6 and polyamine-6. The advantage of this composition is that it is isomeric The part made of guanamine shows the optimum weld strength when welding similar polyamine parts. According to other embodiments of the invention, the polyamide composition of part L comprises one or more viscosity enhancing additives, which are selected Self-fiber, chain extender 'branched agent and nano-batch. The advantage is that it can obtain good weld performance with viscoelasticity, and the viscoelasticity varies widely. The component L has a polyamine composition including at least 1 〇 % by weight of fiber as a viscosity-increasing additive, preferably at least 20% by weight, more preferably at least 30% by weight At least 40% by weight is optimal. The advantage is that a better weld performance with good mechanical strength can be obtained, and the higher the fiber content, the better the weld performance. There are many fiber-based fibers, such as fiberglass, Carbon fiber, metal whisker, etc. Since the glass fiber is extremely suitable for improving the welding strength, and is strong and inexpensive, the fiberglass fiber is preferred. The fiber has an aspect ratio L / d of at least 20. The advantage is that the aspect ratio l / d at least 20 fibers per unit mass increase the viscosity effect higher than the low aspect ratio L / d. According to another embodiment of the invention, the polyamine composition of part L comprises a branching agent for increasing the viscosity An additive that reacts with the polyamine to render the polyamine composition non-Newtonian melt flow performance. This paper scale applies to China National Standard (CNS) A4 specification (210X297 mm) (please read the note on the back and fill out this page) 41· r Ministry of Economic Affairs Intellectual Property Bureau Completion Consumer Cooperative Printed 1305790 A7 B7 V. DESCRIPTION OF THE INVENTION (6) It should be understood that the non-Newtonian melt flow herein is a rheological behavior of a molten polymer composition in which the melt shear viscosity of the molten polymer composition increases as the shear rate decreases. Preferably, the branching agent is admixed with a polyamine having a relative solution viscosity greater than 2 · 4 and/or a terminal group concentration greater than 20 me ci/kg. It is preferred that a branching agent is mixed with the glass fibers to obtain a rigid product having a very good welding strength. Suitable branching agents are a copolymer comprising an anhydride, preferably a copolymer of maleic anhydride and styrene. Polymers comprising anhydrides are known to comprise polymers of anhydride groups or other groups, such as dicarboxylic acid groups, which groups can form anhydride groups under polymer processing conditions. When the branching agent comprises a) a copolymer of at least one unsaturated dicarboxylic acid or a derivative thereof and a vinyl aromatic monomer, preferably a styrene maleic anhydride copolymer (S Μ A ), And b) a copolymer of acrylonitrile and a vinyl aromatic monomer, preferably styrene-acrylonitrile copolymer (SMA), which can obtain better welding strength, wherein (a) and (b) are mutually miscible. Moreover, the ratio of (a) / (b) is between 1/3 and 3/1. The advantage is that such a branching agent has less gel forming effect and a more uniform property. According to a specific embodiment of the method of the present invention, the polyamine composition of the component L comprises a chain extender as an additive for viscosity enhancement. , such as bis-diimidazole or carbonyl di-alaninate. The advantage is that the molecular weight obtainable in the final product is higher than the general product used under standard processing conditions due to the in situ reaction. The chain extender is preferably a carbonyl dialaninate, and the carbonyl bis-caprolactam is preferred. The advantage is that the chain extender can be applied to the Chinese National Standard (CNS) A4 specification (210X297). PCT) (Please read the notes on the back and fill out this page) C.

1T Ministry of Economic Affairs Intellectual Property Bureau employee consumption cooperative printing 1305790 A7 B7 V. Invention description (7) to make the final product have better properties. In the present invention, the method of the present invention is particularly relevant, wherein the fusion bonding is performed by laser welding, vibration welding or hot plate welding, and vibration welding is preferred. The advantages of the process of the invention are particularly in the case of fusion welding by vibration welding. The invention relates to a welded article of polyamine produced according to the process of the invention described above. Such a welded article shows good weld strength. The weld strength is preferably at least 20 MPa, more preferably 40 MPa, and most preferably 60 Μ P a . The weld strength is preferably at least 30% of the overall strength of the component L composition, preferably at least 40%, and the overall strength of the component L composition is at least 5% optimal. The invention further relates to a polyamidene fusion article of two fused together polyamine parts, wherein both parts L are made of a polyamidamine composition comprising polyamine and other optional additives, the part The polymethylamine of one (component L) has a softening temperature lower than that of the other component (component Η). The polyamine composition of component L comprises a high molecular weight polyamine and/or a viscosity enhancing additive. The advantage of such a welded article is that it combines high temperature resistance with good good flexibility and good weld strength. Preferably, the preferred embodiment is comprised of a polyamide fused article wherein the polyamine composition of component L has a melt shear viscosity of at least 2 〇〇P a · s and at least 3 〇〇P a · s is preferred. . Such a polyamide fused article exhibits significant weld strength. The invention also relates to the manufacture of a polyamine fusion welding material, wherein the fusion welding is performed by laser welding 'vibration welding or hot plate welding, and the vibration welding is used as a good paper size for the Chinese National Standard (CNS) A4 specification (2丨OX297 public) PCT) (Please read the note on the back and fill out this page) -s Γ Printed by the Consumers' Cooperative of the Ministry of Economic Affairs, Zhici Property Bureau-10-1305790 A7 V. INSTRUCTIONS (8) The invention is further related to the method according to the invention Corrugated tube 'window, grain, fuel inlet system, air inlet manifold and duct. The invention is further illustrated by the following examples and comparative experiments. Material used S Μ A A copolymer of styrene-maleic anhydride The content of maleic anhydride is 28% by mass (Model Stapron® SZ28110, DSM, NL); a styrene acrylonitrile copolymer having an AN content of 28% by mass, MFI (220 ° C, 1〇kg) 5 0 g / 1 0 mi n ( DSM > NL)

SAN (please read the notes on the back and fill out this page) -β

T Ministry of Economic Affairs Smart Finance Bureau employee consumption cooperative printed LDPE - low density polyethylene (model Lupolen® 1810H, BASF, DE); p A - 6 - I polyamine-6, rirel = 2.2 (at 25 °C, 1% by mass in formic acid) (Model Akulon® K122, DSM, NL); Melt shear viscosity at 10 〇s - 1 and 2 60 °C 14 0 P a . s 〇PA - 6 — II Polyamine—6, η μ [=2 · 5 (measured at 2 5 t in 1% by mass in formic acid) (model Akulon® C225, DSM, NL); at 1 〇〇s — 1 and 2 Melt shear viscosity at 60 °C This paper scale applies to China National Standard (CNS) Λ4 specification (21〇X 297 漦) -11 - 1305790 Α7 Β7 5. Invention description (9) 2 0 0 P a . s . PA~4,6 Polyamine-4,6 (Model Stanyl® TW 200; (Please read the note on the back and fill out this page) DSM, NL); GF ~ I for the standard polymerization of Polyamine-6 Amide glass fiber (model OCF CS 1 7 3 X - 1 0 C : Owens Corning); GF - II standard polyamide glass fiber for polyamine 4,6 (model 〇CF R 7 3 WX 1 : Owens Corning). Preparation of a chemical agent on a ZSK 57 extruder, set the temperature to 2 30 ° C, and set the speed to 2 0 0 rpm, squeeze SMA / SAN / LDPE (mass ratio 25 / 25 / 50) a mixture. Its output is 1 10 k g / hour, which is controlled by momentum at 85 %. The mixture is easily squeezed and cut into regular particles. Ministry of Economic Affairs, Intellectual Property Bureau, GI Industrial Cooperative, Printed

Preparation of polyamine composition PA - 6 - 1 - GF at a barrel temperature of 260 ° C, screw speed of 250 rpm, in a twin-screw extruder of the type ZSK 30, by PA - 6 - 1 Mix with GF-I to form 30% by weight of glass fiber reinforced PA-6-1 to GF. At a shear rate of 100 3 -1 and 260 Torr, the shear viscosity of the composition was 300 Pa·s. This paper scale applies to China National Standard (CNS) A4 specification (210Χ297 mm) -12- 1305790 A7 B7 V. Invention description (10)

PA-6-2-GF is mixed with PA-6-2 and GF-I to form 30% by weight of glass fiber reinforced PA-6-2GF by the same conditions as PA-1-6-GF. The shear viscosity of the composition was 5 〇〇 Pa . s at a shear rate of 1 〇〇 s-1 and 26 CKC.

PA — 6 — 2 — BA — GF On a Z SK 30 twin-screw extruder, by mixing PA -6 — 2, the branching agent SMA/SAN/LDPE (as mentioned above, the mass ratio is 2 5 / 2 5 / 5 0 ), regular processing aid and stabilizer, and glass fiber GF-1, obtained from 2-7 mass% branching agent modified polyamide-6 and 30% by mass glass fiber reinforced p A — 6 — 2 —BA — The composition of GF. The temperature is controlled at 270 °C and yields approximately 10 kg/hour. At a shear rate of 1 〇〇 s-1 and 260 °C, the shear viscosity of the composition is 1 1 30 P a . s 〇

PA — 4,6 — GF at a barrel temperature of 300 ° C, screw speed of 2 7 5 rpm (output of 20 kg / h), in the model ZSK 25 extruder, by PA - 4,6 It is mixed with GF-TI to form PA-4,6-GF which is strengthened by 30% by mass of glass fiber. This paper scale applies to Chinese national standards (CNS>A4 specifications (21〇X; 297 mm) 703 (please read the notes on the back and fill out this page)

, 1T - cans - Ministry of Economic Affairs, Zhisheng Property Bureau, 8 workers, consumer cooperation, printing -13- 1305790 A7 __ B7 V. Invention description (11) Measuring melt shear mutagenesis _ at I / d = 3 0 mm / 1 mm In the capillary rheometer, the melt shear viscosity of the polyamide and polyamine composition was measured according to J s 〇1 1 4 4 3 ( Λ 1 ) at a shear rate of 10 S -1 . Polyamine-6 was measured at 260 t, while polyamine-6,6 was carried out at 280 °C. Injection molding All test materials were injected to form a plate having a size of 1 2 Omm x 1 2 Omm x 4 mm according to the following conditions. The injection-molded polyamide-fi material was set on a Κ Μ 1 2 0 injection molding machine with a barrel temperature of 2 3 0 - 2 60 ° C and a mold temperature of 80 ° C. 6 I. 1, PA — 6-2 ' PA — 6 — GF, PA — 6 — 2 — GF and PA — 6 — 2 — BAN— GF injection molding. The injection-molded polyamide-4,6 material was placed on a KM 1 20 injection molding machine with a barrel temperature of 300 - 3 10 ° C and a mold temperature of 1 2 ° ° C for polyamine- 4 ' 6 material. PA - 4,6 and PA -4,6 - GF injection molding vibration melting This paper scale applies to China National Standard (CNS) A4 specification (210X297 mm) (Please read the back note first and then fill out this page c. Customs Ministry of Economic Affairs Intellectual Property Bureau 8 Workers Consumption Cooperative Printed - 14 - 1305790 A7 B7 V. Invention Description (12) The welding test was carried out on the vibration welding machine K 3 2 1 0 of Bielomatik (Neuffen Germany). The welding parameters are as follows: 2 4 ◦ Η z ; amplitude: 〇 . 9 m m ; welding pressure: 2 M p a ; welding time: 4 s; fixed time: 7 s. The method controls the time ' to obtain an estimated weld depth of 1.8 m. For each fusion bond combination, 5 welds were performed. For the welding test, the injection-molded part was cut into two halves along a width of 110 mm. The pair of seam welded samples are oriented in the tool such that the 120 m m X 4 mm surface becomes the weld area. The welding on the molded surface is more suitable for industrial welding methods. The vibration system is parallel to the width of the 120 mm plate. Tensile test. The slit welded specimen was cut into a tensile specimen of 10 mm width and loaded on a Zwick test machine at a crosshead speed of 1 〇 mm/min until bursting. The tensile strength was determined from the fracture point of the welded area (4 m m X 1 〇 mm). The strain is measured by an extensometer and acts as a coarse strain at the point of failure; in many cases, the true strain may be much higher. The number listed is the average of five samples. Relative weld strength f / = σ * » /σ s η is the ratio of the weld strength to the strength of the polyamide-6 composition used in a particular combination. Rich and Control Experiments The vibration fusion of the above method was carried out for the combination of materials listed in Table I. This paper size applies to the Chinese National Standard (CNS) Α4 specification (2!0'X 297 mm) (please read the notes on the back and fill out this page) C. Book the Intellectual Property Bureau of the Ministry of Economic Affairs! *Working Consumer Cooperatives Printing -15- 1305790 A7 B7 V. INSTRUCTIONS (13) According to the above method, a tensile test is performed on these welded materials. The test results are shown in Table I. Ministry of Economic Affairs, Intellectual Property Bureau, Completion and Consumer Cooperatives, Printed Table I. Winter phase fusion and tensile test results of a polyamide- 6 composition and a polyamine-based composition. Material σ - ma λ at σ-max f / ε Example [MPa] [%] σ fusion / σ overall control experiment A PA-6-1 PA-4,6 - no fusion - Example I PA-6-2 PA-4,6 20 0.7 0.32 Example II PA-6-1-GF PA-4,6-GF 53 1.0 0.43 Example III PA-6-2-GF PA-4,6-GF 60 1.3 0.48 Example IV PA-6-2- BA-GF PA-4,6-GF 63 1.5 0.58 * f,: relative fusion strength, refer to the composition of polyamine-6 (please read the note on the back and fill in this page) This paper scale applies to Chinese national standards ( CNS ) A4 size (210X 297 mm) -16

Claims (1)

1305790 Α8 Β8 C8 D8 VI. Application for Patent Scope Annex 2A Patent Application No. 91 107101 for Chinese Patent Application!: For __Change: Min _ 牟 牟 鲜 舭 ^ ^, ', 一---- ---s:j 1· A method of dissolving two kinds of polyamine parts, both of which are made of polyamine composition. The composition comprises a polyamine and optionally several additives. The softening temperature of one (component L·) of polyamine is lower than that of the other component (component Η), and wherein the polyamine composition of component 1 contains one or more viscosity-increasing additives, such improvement The viscosity additive is such that the melt shear viscosity of the polyamide composition is increased by at least 30% compared to the melt shear viscosity of the polyamide (according to the ISO ιΐ443 (Α1) standard, in a capillary rheometer, shearing a rate of 1 〇〇si measured, 1 / d = 3 〇 mm / lmm), wherein the viscosity enhancing additive is selected from the group consisting of fibers, chain extenders, branching agents or nano-powders and wherein the fusion is effected by laser Moltening, vibration welding or hot plate welding. 2 · As in the method of claim 1, The melt shear viscosity of the polyamine composition of the middle part 1 is increased by at least 50%. 3 - The method of claim 1 or 2, wherein the polyamine composition of the part 1 has a melt shear viscosity of at least 200 Pa. s. 4 A method of welding two polyamine parts, both of which are made of a polyamine composition comprising a polyamine and optionally one of several additives' components ( The softening temperature of the polyamide of part L) is lower than that of the other part (component Η), and the size of the 醯 纸张 paper of the part 1 is 中国 China National Standard (CNS) Α 4 (210X297厘) (Please read the notes on the back and fill out this page) Order #1. Ministry of Economic Affairs Intellectual Property Bureau Staff Consumer Cooperative Printed 1305790 A8 B8 C8 D8 VI. Patent Application Amine composition contains a high molecular weight polyamine and / or several viscosity-increasing additives, and at 1 〇〇S·1, the poly-decylamine composition of component L has a melt shear viscosity of at least 200 Pa.s 'where the viscosity-increasing additive is selected from fibers, chain growth Agent, branching agent or nano-drinking material And wherein the welding is performed by laser welding, vibration welding or hot plate welding. 5 · The method of claim 1 or 4, wherein the polyamine composition of the component 1 comprises a relative solution viscosity 2 〇 to 4 polyamide and several viscosity-increasing additives, wherein the viscosity of the polyamine relative to the solution is determined at 1 5 C from a solution of 1 g / 1 〇〇m 1 of 90% formic acid. The method of claim 1 or 4, wherein the softening temperature of the polyamide of the component η is higher than 280 ° C, and the softening temperature of the polyamine of the component L is lower than 27 (TC). 7. The method of claim 6, wherein the component of the polyamine is selected from the group consisting of polyamine-4,6 or a semi-aromatic (co)polyamine, such as polyamine (6,6/ 6, Τ / 6, I ), polyamine (6, Τ / 4, Τ). 8. The method of claim 1 or 4, wherein the polyamine of the component η is polyamine-4'6' and the polyamine of the component L is polyamine-6. 9. The method of claim 1, wherein the polyamine composition of the component 1 comprises at least 10% by weight of the fiber as a method for improving the viscosity additive 〇1, such as the method of claim 9, wherein the fiber is glass fiber. The method of claim 9, wherein the fiber has an aspect ratio L/d of at least 20. This paper scale applies to the national standard ((: Can) eight 4 specifications (210/297 mm) (please read the note on the back and fill out this page). The Ministry of Economic Affairs, Intellectual Property Bureau, Staff Consumer Cooperative, Printed -2- A8 B8 C8 D8 1305790 VI. Scope of application (please read first, note on the back side of this page) 12. If the method of claim 1 or 4, the polyamine composition of part L contains a branch The agent acts as an viscosity increasing additive, and the branching agent reacts with the polyamidamine to impart a non-Newtonian melt flow behavior to the polyamidamine composition. 3) The method of claim 12, wherein The branching agent is a copolymer containing an anhydride. The method according to claim 12, wherein the branching agent comprises a) a copolymer which is at least one unsaturated dicarboxylic acid or a derivative thereof a copolymer with a vinyl aromatic monomer, and b) a copolymer of acrylonitrile and a vinyl aromatic monomer, wherein (a) and (b) are miscible and (a ) / ( b ) is between 1/3 and 3/1. The method of claim 1 or 4, wherein the polyamine composition of the component 1 comprises a chain extender as a viscosity improving additive 〇1 6 · as in the method of claim 1 or 4, The welding action is performed by vibration welding. Printed by the Intellectual Property Office of the Ministry of Economic Affairs, the Consumers' Cooperative, 17. A polyamine-melting article comprising two polyamine components welded together, both of which are made of a polyamide composition, the composition comprising a polydecylamine and optionally several additives, one of the components (component L) having a softening temperature lower than that of the other component (component Η), and wherein the component L is polyamine The composition comprises a high molecular weight polyamine and/or a plurality of viscosity enhancing additives, the weld strength being at least 40 MPa and at least 40% of the total strength of the composition of the component L, wherein the viscosity enhancing additive is selected Applicable to China National Standard (CNS) A4 specification (210X297 mm) from fiber, chain extender, branching agent or paper size. -3- 1305790 H C8 D8 VI. Patent application range micro-twisting and the fusion system It is carried out by laser welding, vibration welding or hot plate welding. 18. The polyamine fused article of claim 17 wherein the poly-decylamine composition of component L has a melt shear viscosity of at least 200 Pa.s at 100 s.1. 1 9 • Polyurethane fusion articles as claimed in Article 17 or 18 of the patent application, which are corrugated tubes, bellows, vessels, fuel inlet systems, air inlet manifolds or ducts. (Please read the notes on the back and fill out this page.) Printed by the Intellectual Property Office of the Intellectual Property Office of the Ministry of Economic Affairs. This paper is based on the Chinese National Standard (CNS) A4 specification (210X297 mm) -4 -