WO2013098978A1 - スライドファスナー用成形部品及びそれを備えたスライドファスナー - Google Patents
スライドファスナー用成形部品及びそれを備えたスライドファスナー Download PDFInfo
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- WO2013098978A1 WO2013098978A1 PCT/JP2011/080335 JP2011080335W WO2013098978A1 WO 2013098978 A1 WO2013098978 A1 WO 2013098978A1 JP 2011080335 W JP2011080335 W JP 2011080335W WO 2013098978 A1 WO2013098978 A1 WO 2013098978A1
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- Prior art keywords
- polyamide
- slide fastener
- mass
- molded part
- aliphatic
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Classifications
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- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
- C08L77/00—Compositions of polyamides obtained by reactions forming a carboxylic amide link in the main chain; Compositions of derivatives of such polymers
- C08L77/06—Polyamides derived from polyamines and polycarboxylic acids
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- A—HUMAN NECESSITIES
- A44—HABERDASHERY; JEWELLERY
- A44B—BUTTONS, PINS, BUCKLES, SLIDE FASTENERS, OR THE LIKE
- A44B19/00—Slide fasteners
- A44B19/10—Slide fasteners with a one-piece interlocking member on each stringer tape
- A44B19/12—Interlocking member in the shape of a continuous helix
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D5/00—Producing elements of slide fasteners; Combined making and attaching of elements of slide fasteners
- B29D5/02—Producing elements of slide fasteners; Combined making and attaching of elements of slide fasteners the fasteners having separate interlocking members
-
- C—CHEMISTRY; METALLURGY
- C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
- C08K7/00—Use of ingredients characterised by shape
- C08K7/02—Fibres or whiskers
- C08K7/04—Fibres or whiskers inorganic
- C08K7/14—Glass
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- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C28/00—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D
- C23C28/02—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material
- C23C28/021—Coating for obtaining at least two superposed coatings either by methods not provided for in a single one of groups C23C2/00 - C23C26/00 or by combinations of methods provided for in subclasses C23C and C25C or C25D only coatings only including layers of metallic material including at least one metal alloy layer
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2077/00—Use of PA, i.e. polyamides, e.g. polyesteramides or derivatives thereof, as moulding material
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/31504—Composite [nonstructural laminate]
- Y10T428/31678—Of metal
- Y10T428/31681—Next to polyester, polyamide or polyimide [e.g., alkyd, glue, or nylon, etc.]
Definitions
- the present invention relates to a molded part for a slide fastener such as a slider, an upper stopper and a lower stopper.
- the present invention also relates to a slide fastener provided with the molded part for slide fastener.
- the slide fastener is an opening / closing tool for articles that are used not only for daily necessities such as clothing, bags, shoes and sundries, but also for industrial items such as water tanks, fishing nets and space suits.
- FIG. 1 shows a configuration of a general slide fastener.
- a slide fastener 10 includes a pair of long tapes 11 and a number of elements which are meshing portions of fasteners sewn along one side edge of each tape. 12 and the three parts of the slider 13 which controls the opening and closing of the fastener by engaging and separating the element 12. Further, in order to prevent the slider 13 from falling off, an upper stopper 14 and an opening tool 15 can be provided, and a handle 16 can be attached to the surface of the slider 13.
- the opening tool 15 can be composed of a box 15c with a butterfly stick 15a and a box stick 15b. While the slider 13 moves to the opening 15 provided at the lower part of the long tape 11, the engagement of the element 12 is released, the butterfly bar 15a is extracted from the box 15c, and each tape 11 is separated.
- slide fasteners elements, sliders, top and bottom stops, and opening devices are generally molded parts manufactured by injection molding, and it is known that polyamide can be used as a material.
- DE 3444813 discloses that a polyamide reinforced with glass fiber is used as a material for the purpose of improving the durability of a slider used for a slide fastener for bedding, the durability against washing and the iron, and the sliding of the slider.
- a method of injection molding a slider is described (claim 1). It is described that the glass fiber has a length of 4 to 8 mm and a content of 25% by weight or more (claim 1). It is described that the slider is subjected to a recrystallization process after forming (claim 1). Further, it is described that polyamides 6 and 6 are used as the polyamide (claim 6). It is also described that a polyamide containing no lubricant or gliding agent is used and the glass fiber content is about 40% by weight (Claim 5).
- Japanese Patent Publication No. 2008-508399 discloses that “a weight percentage is based on the total weight of the composition, (a) about 40 to about 95”.
- a polyamide composition comprising weight percent of at least one polyamide, (b) from about 5 to about 50 weight percent of at least one inorganic filler, and (c) from about 0.1 to about 10 weight percent of at least one plasticizer.
- a method for producing a metal-plated polyamide composition comprising the step of metal-plating an article comprising: "(Claim 1).
- the metal plating method involves etching the surface of the article with an acid such as chromic acid / sulfuric acid blend, and subsequently depositing a plating catalyst such as tin-stabilized colloidal palladium particles on the surface, and then adding a tin stabilizer.
- a method comprising a step of removing, a step of electroless plating of a layer of metal such as nickel or copper, and a step of electroplating (electroplating) a metal such as copper, nickel and / or chromium. (Paragraph 0019). It is also described that glass fibers may be used as a reinforcing agent (paragraph 016).
- Japanese Patent Publication No. 6-76668 discloses that, for the purpose of improving the adhesion of the metal surface to the plastic surface, “when the surface of the plastic substrate is subjected to electroless plating, the surface of the substrate is previously treated with fluorine gas and inert gas. "Plastic plating method comprising etching or activating the surface by contacting with a mixed gas mainly composed of” (Claim 1).
- a molded part for a slide fastener such as a slider using a polyamide-based resin as a material
- a polyamide-based resin as a material
- the molded parts for slide fasteners are required to have a strength that can withstand practical use.
- the conventional slider made of polyamide resin is mainly intended to improve the durability against washing and ironing and the wear resistance against sliding of the slider. No approach has been made.
- an object of the present invention is to provide a molded part for a slide fastener that has both mechanical strength and plating properties. Moreover, this invention makes it another subject to provide a slide fastener provided with such a molded component for slide fasteners.
- the present inventor has made extensive studies to improve a molded part for a slide fastener made of a resin composition containing polyamide and reinforcing fibers, and has obtained the following knowledge.
- (1) There is a difference in affinity with reinforcing fibers such as glass fibers depending on the type of polyamide.
- Polyamides having a ring structure such as aromatic polyamides and alicyclic polyamides are rigid and lack affinity with reinforcing fibers, while aliphatic polyamides have high flexibility and high affinity with reinforcing fibers. . For this reason, when a large amount of reinforcing fiber is mixed with the polyamide having a ring structure, the strength is lowered.
- the polyamide is an aliphatic polyamide
- a high strength improvement effect can be obtained even if a large amount of reinforcing fiber is added.
- a polyamide containing a large amount of a ring structure such as a benzene ring
- melt fracture tends to occur at the time of molding, so that the molding processability is poor.
- the strength is improved by increasing the concentration of the reinforcing fiber, the concentration of the polyamide component is decreased, and as a result, the terminal carboxyl group is also decreased, so that the plating property is deteriorated.
- the filling rate at the time of injection-molding the molded part for fasteners is deteriorated, resulting in problems such as a decrease in yield and a prolonged molding cycle.
- the melt flow rate (MFR) of the resin composition is increased.
- the broad molecular weight distribution also increases the low molecular weight components, so the MFR increases and the fluidity during injection molding improves.
- it becomes excessively high not only will the strength decrease, but the flow will become uneven due to the increase in low molecular weight components, resulting in poor appearance, and the dimensional stability in the summer environment will be affected by the water absorption rate derived from the polymer components. Problems such as worsening occur.
- the present inventor uses a high concentration of an aliphatic polyamide having a high affinity with reinforcing fibers while ensuring plating properties by keeping the weight average molecular weight (Mw) of the polyamide relatively low. It has been found that by increasing the mixing ratio of the reinforcing fibers, the strength can be improved by improving the strength. And, by adding no components other than the polyamide and the reinforcing fibers, and desirably adding no components other than the aliphatic polyamide and the reinforcing fibers, the strength improving effect due to the high affinity between the aliphatic polyamide and the reinforcing fibers can be sufficiently exhibited. I found out that It has also been found that excellent moldability, good appearance, and excellent dimensional stability can be obtained by controlling the MFR within a certain range.
- the resin composition contains 30 to 50% by mass of polyamide and 50 to 70% by mass of reinforcing fibers, and the total of the polyamide and the reinforcing fibers is substantially 100% by mass
- a molded part for a slide fastener made of a resin composition in which the polyamide has a weight average molecular weight of 30,000 to 80,000 and 50% by mass or more of the polyamide is an aliphatic polyamide.
- the resin composition has a melt flow rate of 6 to 50 g / 10 min.
- the carboxyl group equivalent on the part surface is 0.9 atomic% or more.
- the proportion of the aliphatic polyamide is 80 parts by mass or more, with the total amount of polyamide being 100 parts by mass.
- the proportion of the aliphatic polyamide is 100 parts by mass, where the total amount of polyamide is 100 parts by mass.
- the aliphatic polyamide contains at least one aliphatic polyamide obtained by co-condensation polymerization of an aliphatic diamine and an aliphatic dicarboxylic acid.
- the aliphatic polyamide includes at least one selected from the group consisting of nylon 6,6, nylon 6,10, and nylon 6,12. .
- the reinforcing fiber includes at least one selected from the group consisting of glass fiber, carbon fiber, and aramid fiber.
- At least a part of the surface is metal-plated.
- the present invention is a slide fastener including the molded part for slide fastener according to the present invention.
- a molded part for a slide fastener having both mechanical strength and plating properties can be obtained.
- plating to the molded part for slide fastener according to the present invention, high designability can also be realized.
- the strength improvement effect due to the high affinity between the aliphatic polyamide and the reinforcing fiber can be sufficiently exhibited, and the cost can be reduced.
- a resin composition in which MFR is controlled as a material a molded part for slide fastener having high quality stability can be manufactured with high production efficiency.
- a molded part for slide fastener is made of a resin composition containing only a predetermined proportion of polyamide and reinforcing fibers. It is one of the features to configure.
- Various additives such as fillers, heat stabilizers, weathering agents, hydrolysis agents and pigments are added to general resin molded parts for slide fasteners. In the present invention, such additives are added. Do not use agents. Rather, such an additive may be an obstacle to the strength improvement effect due to the high affinity between the aliphatic polyamide and the reinforcing fiber. Adding various additives leads to an increase in cost. Therefore, it can be said that the present invention has a great technical contribution in that it has been found that a resin-made molded part for a slide fastener can be provided with a minimum amount of components.
- the molded part for slide fastener according to the present invention contains 30 to 50% by mass of polyamide and 50 to 70% by mass of reinforcing fiber, and the total of polyamide and reinforcing fiber is substantially 100% by mass.
- a resin composition having a weight average molecular weight of 30,000 to 80,000, and 50% by mass or more of the polyamide is an aliphatic polyamide is used as a material. “Substantially” assumes that unexpected impurities are mixed into the composition during the production process, and does not assume that other components are positively added.
- the total of the aliphatic polyamide and the reinforcing fiber in the resin composition is 99% by mass or more, preferably 99.5% by mass or more, more preferably 99.9% by mass or more, Preferably it is 100 mass%.
- the reason why 50% by mass or more of the polyamide is an aliphatic polyamide is that, as described above, the affinity with the reinforcing fiber is high and the reinforcing fiber can be highly filled.
- Aliphatic polyamides have more amide bonds in the unit molecular structure than aromatic polyamides. For this reason, the increase effect of the carboxyl group by the surface modification demonstrated later is high, and plating property is easy to improve.
- the aliphatic polyamide in the polyamide is preferably 80% by mass or more, more preferably 100% by mass.
- the aliphatic polyamide can be obtained by, but not limited to, copolycondensation of aliphatic diamine and aliphatic dicarboxylic acid, polycondensation of ⁇ -amino acid, and ring-opening polymerization of lactams.
- the aliphatic diamine include linear or branched chains such as ethylenediamine, propylenediamine, butylenediamine, hexamethylenediamine, 2-methylpropanediamine, 3-methylpropanediamine, octamethylenediamine, decanediamine, and dodecanediamine.
- aliphatic diamines are examples of aliphatic diamines.
- Examples of the aliphatic dicarboxylic acid include succinic acid, propanedioic acid, butanedioic acid, pentanedioic acid, adipic acid, heptanedioic acid, octanedioic acid, nonanedioic acid, decanedioic acid, dodecanedioic acid, and undecanedioic acid.
- linear or branched aliphatic dicarboxylic acids such as dimer acid and hydrogenated dimer acid.
- Examples of ⁇ -amino acids include 6-aminohexanoic acid, 11-aminoundecanoic acid, 12-aminododecanoic acid, and the like.
- Examples of the lactam include ⁇ -caprolactam, undecane lactam, and lauryl lactam.
- the specific structure of the aliphatic polyamide is not limited, but the following formula: —NHR 1 NHC ( ⁇ O) R 2 C ( ⁇ O) — or —NHR 1 C ( ⁇ O) — (wherein R 1 and R 2 are the same or different groups, and are alkylene groups having at least 2 carbon atoms, preferably alkylene groups having 2 to 12, more preferably 6 to 10 carbon atoms.
- R 1 and R 2 are the same or different groups, and are alkylene groups having at least 2 carbon atoms, preferably alkylene groups having 2 to 12, more preferably 6 to 10 carbon atoms.
- a typical example is a polyamide having repeating monomer units represented by.) Or a combination thereof.
- aliphatic polyamide examples include polytetramethylene adipamide (nylon 4, 6), polyhexamethylene adipamide (nylon 6, 6), polyhexamethylene azelainamide (nylon 6, 9), polyhexamethylene Sebacinamide (nylon 6,10), polyhexamethylene dodecandiamide (nylon 6,12), polyheptamethylene pimelinamide (nylon 7,7), polyoctamethylene suberamide (nylon 8,8), polynonamethylene ase
- aliphatic polyamides synthesized by the copolycondensation reaction of aliphatic diamines and aliphatic dicarboxylic acids such as light amide (nylon 9, 9) and polydecamethylene azelainamide (nylon 10, 9)
- poly (4- Aminobutyric acid) nylon 4
- poly (6-aminohexanoic acid) Iron 6
- poly (7-aminoheptanoic acid) nylon 7
- a copolymer obtained by an arbitrary combination of repeating units of aliphatic polyamide can also be used.
- aliphatic polyamide copolymers include caprolactam / hexamethylene adipamide copolymer (nylon 6/6, 6), hexamethylene adipamide / caprolactam copolymer (nylon 6, 6). / 6), hexamethylene adipamide / hexamethylene-azelainamide copolymer (nylon 6, 6/6, 9) and the like.
- At least one aliphatic polyamide obtained by co-condensation polymerization of an aliphatic diamine and an aliphatic dicarboxylic acid More preferably, only polyamide is used. This is because the higher the carboxyl group concentration, the better the plating property, but the carboxyl group concentration can be increased by using dicarboxylic acid.
- the use of a monomer having a small molecular weight increases the relative amount of amide bonds, which improves the plating performance, but conversely increases the number of hydrogen bonding sites, resulting in higher water absorption and greater humidity dependence. The problem that becomes.
- an aliphatic polyamide in which R 1 and R 2 are 6 to 12, respectively is preferable to use at least one selected from the group consisting of nylon 6,6, nylon 6,10, and nylon 6,12.
- Polyamides other than aliphatic polyamides do not need to be positively added to the resin composition, but are acceptable if they are less than 50% by mass in the polyamide.
- the polyamide other than the aliphatic polyamide is not particularly limited, and examples thereof include aromatic polyamides and non-aromatic cyclic polyamides. These include diamines having an aromatic group or a non-aromatic cyclic group, dicarboxylic acids, or It can be obtained by polycondensation using at least one ⁇ -amino acid as a monomer component.
- One type of polyamide other than the aliphatic polyamide may be used, or two or more types may be used in combination.
- diamine examples include aromatic diamines such as 1,2-diaminobenzene, 1,3-diaminobenzene, 1,4-diaminobenzene, and metaxylenediamine, isophorone diamine, 2-aminomethylpiperidine, and 4-aminomethyl.
- Piperidine 4,4'-diaminodicyclohexylenemethane, 4,4'-diamino-3,3'-dimethyldicyclohexylenemethane, 1,3-di (4-piperidyl) -propane, 1,2-diaminocyclohexane 1,3-diaminocyclohexane, 1,4-diaminocyclohexane, N-aminopropylpiperazine, 4,4′-diaminodicyclohexylenepropane, 1,2-bis (aminomethyl) cyclohexane, and 1,4-bis ( Diamino having a non-aromatic cyclic group such as aminopropyl) piperazine Such as emissions, and the like.
- dicarboxylic acid examples include aromatic dicarboxylic acids such as phthalic acid, terephthalic acid and isophthalic acid, 1,4-cyclohexanedicarboxylic acid, 1,2-cyclohexanedicarboxylic acid, 1,3-cyclohexanedicarboxylic acid, tetrahydrophthalic acid, tetrahydro Phthalic anhydride, hexahydrophthalic acid, hexahydrophthalic anhydride, 3-methyl-1,2,3,6-tetrahydrophthalic anhydride, 4-methyl-1,2,3,6-tetrahydrophthalic anhydride, 3- Methyl-1,2,3,6-tetrahydrophthalic acid, 4-methyl-1,2,3,6-tetrahydrophthalic acid, 3-methyl-hexahydrophthalic anhydride, 4-methylhexahydrophthalic anhydride, 3- Di-having non-aromatic cyclic groups such as methylhexahydrophthalic
- Examples of the ⁇ -amino acid include 4-piperidine carboxylic acid, 3-piperidine carboxylic acid, 2-piperidine carboxylic acid and the like.
- polyamides other than aliphatic polyamide include PA6T (co-condensation polymerization of hexamethylenediamine and terephthalic acid), PA6I (co-condensation polymerization of hexamethylenediamine and isophthalic acid), PA-MXD (metaxylylenediamine and adipine) Acid co-condensation polymerization) and the like.
- the preferred weight average molecular weight of the polyamide is 35,000-65,000.
- the weight average molecular weight of the polyamide here is the weight average molecular weight of the polyamide when only one kind of polyamide is used. When two or more kinds of polyamide are used, the weight average molecular weight of the polyamide is measured. Weight average molecular weight. In the present invention, the weight average molecular weight is measured by gel permeation chromatography (GPC).
- the resin composition used as the material of the slide fastener part according to the present invention is composed of 50 to 70% by mass of reinforcing fibers and more than half of the weight of the resin composition is composed of reinforcing fibers, and the remaining 30 to 50 Mass% is polyamide.
- the strength improving effect is obtained. Can be maintained.
- the upper limit of the reinforcing fiber is set to 70% by mass because if the reinforcing fiber exceeds 70% by mass, the plating property tends to be insufficient.
- the lower limit of the reinforcing fiber is set to 50% by mass when it is less than 50% by mass. This is because sufficient mechanical strength is not exhibited.
- the reinforcing fiber in the resin composition is 60 to 70% by mass, and the total amount of the remaining polyamide is 100 parts by mass.
- the part is preferably an aliphatic polyamide.
- the reinforcing fiber used in the present invention is not limited.
- glass fiber in addition to organic fibers such as carbon fiber and aramid fiber, glass fiber, acicular wollastonite, whisker (eg, calcium titanate whisker, calcium carbonate).
- whisker eg, calcium titanate whisker, calcium carbonate
- Inorganic fibers such as whiskers and aluminum borate whiskers
- glass fibers can be used from the viewpoint of enhancing the affinity with polyamide by reinforcing the fiber surface with silane coupling. It is preferable to use it. These may be used alone or in combination of two or more.
- the average fiber diameter before compounding with the resin is preferably about 3 to 20 ⁇ m, and more preferably about 5 to 10 ⁇ m.
- the average fiber length before compounding with the resin is preferably about 1 mm to 10 mm, and more preferably about 3 mm to 6 mm.
- the fiber diameter refers to the diameter when the cross-sectional area of the reinforcing fiber is obtained and the cross-sectional area is calculated as a perfect circle.
- the aspect ratio before compounding with the resin average fiber diameter: average fiber length is preferably 1:50 to 3: 10000, and more preferably 1: 300 to 1: 1200.
- the average fiber length of the reinforcing fibers is generally 1/10 to 1/20, for example, 0.1 to 1 mm, typically 0.1 to 0.5 mm.
- melt flow rate (MFR) of the resin composition that is the material of the slide fastener molded part according to the present invention is also preferable to control the melt flow rate (MFR) of the resin composition that is the material of the slide fastener molded part according to the present invention.
- MFR melt flow rate
- the MFR becomes excessively high, not only does the strength decrease, but flow unevenness occurs due to the spread of the molecular weight distribution, resulting in poor appearance, or the dimensional stability of the summer environment due to the influence of the water absorption rate derived from the polymer component. Problems such as getting worse.
- a preferred MFR is 6 to 50 g / 10 min, and a more preferred MFR is 10 to 30 g / 10 min.
- MFR is measured at 320 ° C. and a measurement load of 2.16 kg in accordance with JIS K7210 (Method A).
- the molded part for the slide fastener is not particularly limited as long as it is a molded part constituting the slide fastener, but generally includes an element, a slider, a puller, an upper stopper, a lower stopper, and an opening tool. At least one of these slide fastener molded parts can be produced using the resin composition according to the present invention, and in particular, the resin composition according to the present invention can be suitably used as a material for sliders and pullers. . Furthermore, various slide fasteners provided with the molded parts for slide fasteners can be manufactured.
- the type of the element 12 that is the meshing portion of the slide fastener is not particularly limited, and examples thereof include a coil fastener, an extrusion fastener, and an injection fastener.
- the polyamide and the reinforcing fibers that are components of the resin composition are sufficiently kneaded so that the components are not biased.
- a single screw extruder, a twin screw extruder, a kneader or the like can be used for the kneading.
- the resin composition after kneading is injection-molded using a mold having a predetermined shape, various molded parts for slide fasteners are completed.
- a twin screw extruder can be used conveniently.
- the cylinder temperature is preferably set in the range of 280 to 320 ° C. from the viewpoint of ensuring high productivity without deterioration, and the mold temperature is higher than usual, for example, 90 to 130. It is preferable to set it as ° C.
- the surface carboxyl group equivalent is preferably 0.9 atomic% or more, more preferably 1.5 atomic% or more, and typically 1 to 4%. Atomic percent, more typically 1 to 2 atomic percent. This is because if the carboxyl group equivalent on the surface of the component is 0.9 atomic% or more, good plating properties can be obtained and peeling is difficult.
- the carboxyl group equivalent on the part surface depends on the type and concentration of the polyamide used. In order to increase the carboxyl group equivalent, use of a low molecular weight polyamide or use of a dicarboxylic acid as a monomer of the polyamide can be mentioned.
- the carboxyl group equivalent can be increased by modifying the surface after molding.
- the surface modification method include a method of forming a carboxyl group by hydrolyzing a surface amide bond. Examples of such methods include surface treatment using fluorine gas as described in JP-B-6-76668, UV irradiation method, plasma irradiation method, and the like. Water for hydrolysis may be actively supplied, but an amount contained in the air as moisture is sufficient. However, it should be noted that even if the surface modification is performed, sufficient carboxyl groups are not formed if the type and concentration of the polyamide to be used are not appropriately selected.
- metal platings can be applied to the molded part for slide fastener according to the present invention.
- the metal plating include, but are not limited to, chromium plating, nickel plating, copper plating, gold plating, brass plating, and other alloy plating.
- the method of metal plating There is no particular limitation on the method of metal plating.
- electroplating preferably electroless plating is performed before electroplating
- dry plating such as vacuum deposition, sputtering, or ion plating is appropriately performed. Just do it. You may combine these methods.
- an electroplating method capable of firmly covering the inside of the slider having a complicated shape is preferable, and it is more preferable to perform electroplating after preliminarily performing electroless plating.
- PA6T co-condensation polymerization of hexamethylenediamine and terephthalic acid
- PA6I co-condensation polymerization of hexamethylenediamine and isophthalic acid
- PA66 polyhexamethylene adipamide
- the weight average molecular weight (Mw) of each polyamide was measured by gel permeation chromatography (GPC) under the following conditions.
- GPC gel permeation chromatography
- melt flow rate (MFR) at 320 ° C. of each polyamide was measured in accordance with JIS K7210 (Method A). In an example in which a plurality of polyamides were mixed and used, measurement was performed using pellets obtained in the same manner as in the measurement of molecular weight.
- the polyamide and glass fiber were kneaded using a twin screw extruder so as to have the respective blending ratios (mass basis) shown in Table 1, and then the molten resin was extruded into a strand shape and solidified in a cooling water bath. Thereafter, the strands were cut with a pelletizer to prepare pellets of the resin compositions of Examples 1 to 7 to be tested.
- This was injection-molded to form a slider for an M class (chain width of 5.5 mm or more and less than 7.0 mm) slide fastener defined in JIS S3015.
- the slider cover and puller were also injection molded from the same material. The cover is a part that fixes the puller to the slider.
- the slider overall strength and top-stop vertical pulling strength were measured. Each measurement was performed according to JIS-S-3015.
- the top longitudinal strength was measured in both a normal temperature environment (23 ° C., relative humidity 50%) and a high temperature environment (40 ° C., relative humidity 80%).
- the total slider strength is measured by measuring the resistance of the slider 13 when a load is applied to the lower surface of the slider 16 and the slider 16 in a single slider 13 formed of resin.
- a strength test is performed to check whether the slider 13 is damaged or deformed by pulling the pulling handle 16 of the slider 13 from the upper surface of the slider and applying a load to the lower surface of the slider body.
- the vertical pulling strength of the top stop is fixed at the lower part of the tape 11 of the fastener 10 with which the element 12 is engaged (the direction in which the opening 15 is provided), and the slider 13 is pulled to the top stop 14 and then pulled strongly.
- the top holding strength on the tape 10 is measured.
- the slider 13 was confirmed to be damaged or deformed by contacting the top stopper 14.
- each gas slider was treated with fluorine gas, and the carboxyl group equivalent of the slider surface before and after that was measured.
- the fluorine gas treatment was carried out by leaving the slider at a fluorine gas concentration of 2% by volume and a temperature of 25 ° C. for 10 minutes in the treatment tank.
- the carboxyl group equivalent was measured by impregnating a silver nitrate aqueous solution for 30 minutes as a pretreatment for the slider, taking out the slider, washing the unreacted aqueous solution with acetone, and drying at room temperature for 24 hours.
- the hydrogen atom at the terminal of the carboxyl group was replaced with Ag (—COOH ⁇ —COOAg).
- the surface carboxyl group was measured from the Ag concentration measured by the X-ray photoelectron spectrometer on the pretreated slider.
- an electroless copper nickel plating is formed with a thickness of 0.5 ⁇ m on each slider, a copper pyrophosphate electroplating is formed with a thickness of 70 ⁇ m, and a copper tin zinc electroplating is further formed thereon with a thickness of 1 ⁇ m. It was formed with a thickness.
- the washing and dry durability of each slider was evaluated. For evaluation by washing, a slider was attached to a fastener chain to form a slide fastener, and washing and drying were performed based on the AATCC standard. Washing and drying were performed by repeating 5 cycles, with washing ⁇ rinsing ⁇ dehydration ⁇ drying as one cycle. The dry durability was evaluated according to the following procedure.
- Examples 1 to 3 and 6 are invention examples, and Examples 4 to 5 and 7 are comparative examples.
- the slider total strength was 140 N or more, and the top longitudinal strength (normal temperature) ) Has a high mechanical strength of 100 N or more, and the top longitudinal pulling strength (high temperature) is 70 N or more, and the effect of increasing the carboxyl group equivalent by the fluorine gas treatment was also high. In addition, washing and dry durability were high.
- Example 3 had a lower glass fiber concentration than Example 1, but the compounding ratio of aliphatic polyamide (PA66) was higher, so the slider overall strength was higher in Example 3 than in Example 1. Furthermore, in Example 2, since only aliphatic polyamide (PA66) was used as the polyamide, the slider overall strength was the highest, and the effect of increasing the carboxyl group equivalent by the fluorine gas treatment was the highest.
- PA66 compounding ratio of aliphatic polyamide
- Example 4 since aliphatic polyamide (PA66) was not used and the weight average molecular weight was too low, the effect of increasing the carboxyl group equivalent by mechanical strength and fluorine gas treatment was insufficient.
- Example 5 aliphatic polyamide (PA66) was used, but the blending ratio was low, so that sufficient mechanical strength was still not obtained, and the effect of increasing the carboxyl group equivalent by the fluorine gas treatment was insufficient.
- Example 6 is the same as Example 2 in that only aliphatic polyamide (PA66) is used as the polyamide, but is an example in which the glass fiber concentration is higher. Although the strength was higher than in Example 2, the carboxyl group equivalent, which is an indicator of plating properties, was less than in Example 2.
- Example 7 only aliphatic polyamide (PA66) is used as the polyamide, so that the plating property is high.
- the slider overall strength is also high.
- the top pulling longitudinal strength in a high temperature environment 40 ° C. is 67 N, which is insufficient.
Abstract
Description
(1)ポリアミドの種類によってはガラス繊維などの強化繊維との親和性に違いがある。芳香族ポリアミドや脂環式ポリアミドなどの環構造を有するポリアミドは、剛直であるために強化繊維との親和性に欠ける一方で、脂肪族ポリアミドは柔軟性が高く、強化繊維との親和性が高い。このため、環構造を有するポリアミドに対して強化繊維を多量に混合すると逆に強度が下がってしまうが、脂肪族ポリアミドであれば強化繊維を多量に添加しても高い強度向上効果が得られる。また、ベンゼン環などの環構造を多く含有するポリアミドでは、強化繊維を高濃度に含むと成形時にメルトフラクチャーが生じやすいため、成型加工性が悪い。
(2)強化繊維の濃度を増やすことで強度は向上するが、ポリアミド成分の濃度が減少し、その結果、末端カルボキシル基も減少するため、めっき性が悪化する。
(3)ポリアミドの分子量は高いほど強度向上に寄与するが、粘度が上がるために生産性が損なわれたり、末端のカルボキシル基が相対的に減ることによりめっき性が低下したりする。高いめっき性を得るには分子量を低くする必要があるが、今度は強度が損なわれてしまう。
(4)芳香族成分を添加すると耐熱性は上がるものの、靱性が損なわれ機械的強度が低下する。
(5)強化繊維の濃度を高くしたり、ポリアミドの分子量を高めたりすると、樹脂組成物のメルトフローレート(MFR)が低くなるが、MFRが過度に低くなると流れ性の悪化によりスライダーなどのスライドファスナー用成形部品を射出成形する際の充填率が悪くなり、歩留まり低下や成形サイクルの長期化などの問題が生じる。強化繊維の濃度を低くしたり、ポリアミドの分子量を低くしたりすると、樹脂組成物のメルトフローレート(MFR)が高くなる。分子量分布を広げることによっても低分子量成分が増えるので、MFRは上昇し、射出成形時の流動性が向上する。ただし、過度に高くなると、強度が低下するのみならず、低分子量成分が増えることで流れムラが発生して外観不良となったり、ポリマー成分由来の吸水率の影響により夏場環境の寸法安定性が悪くなるなどの問題が発生する。
溶離液:ヘキサフルオロイソプロパノール+添加剤CF3COONa(5mmol/L)
標準物質:標準ポリメチルメタクリレート、ジメチルテレフタレート
注入量:100μL
流速:1.0mL/min
カラム温度:40℃
湿度:0.2w/v%
前処理:メンブレンフィルター(孔径:0.2μm)で濾過
スライダー総合強度は、樹脂で成形され完成した単体のスライダー13において引き手16とスライダー本体の下面に荷重を加えた時のスライダー13の抵抗を測定する。スライダー13の引き手16をスライダー上面から引っ張って荷重をかけ、さらにスライダー本体の下面に荷重をかけることによってスライダー13が破損又は変形しないか強度試験を行う。
また、上止縦引強度はエレメント12が噛み合わされたファスナー10のテープ11の下部(開き具15が設けられた方向)を固定し、スライダー13を上止14のところまで引いてから、強く引きテープ10への上止保持強度を測定する。スライダー13が上止14と接触することによってスライダー13の破損や変形を確認した。
洗濯による評価は、スライダーをファスナーチェーンに取り付けてスライドファスナーとし、AATCC規格に基づいて洗濯・乾燥した。洗濯及び乾燥は、洗濯→すすぎ→脱水→乾燥を1サイクルとして、5サイクル繰り返すことにより行った。
ドライ耐久性の評価は以下の手順で行った。洗濯堅牢度試験器の容器にテトラクロロエチレンを入れ、60℃に加温後、スライダーを入れて密閉し、60℃のまま60分間回転させる。60分経過後、スライダーを取り出した。
何れの評価試験においても、目視により2箇所以上剥離が観察される場合をNGとし、剥離が1箇所以下の場合をOKとした。
例1~3、6では、ポリアミドの重量平均分子量、ポリアミド中の脂肪族ポリアミドの配合量、及びガラス繊維の濃度が共に適切であったため、スライダー総合強度は140N以上、上止縦引強度(常温)は100N以上、上止縦引強度(高温)は70N以上と高い機械的強度を有し、フッ素ガス処理によるカルボキシル基当量の増加効果も高かった。また、洗濯、ドライ耐久性も高かった。
11 長尺テープ
12 エレメント
13 スライダー
14 上止め
15 開き具
16 引き手
Claims (10)
- ポリアミドを30~50質量%、強化繊維を50~70質量%含有し、ポリアミド及び強化繊維の合計が実質的に100質量%である樹脂組成物であって、ポリアミドの重量平均分子量が30,000~80,000であり、ポリアミド中の50質量%以上が脂肪族ポリアミドである樹脂組成物を材料としたスライドファスナー用成形部品。
- 樹脂組成物のメルトフローレートが6~50g/10minであるスライドファスナー用成形部品。
- 部品表面のカルボキシル基当量が0.9原子%以上である請求項1又は2に記載のスライドファスナー用成形部品。
- ポリアミドの合計量を100質量部として脂肪族ポリアミドの占める割合が80質量部以上である請求項1~3の何れか一項に記載のスライドファスナー用成形部品。
- ポリアミドの合計量を100質量部として脂肪族ポリアミドの占める割合が100質量部である請求項4に記載のスライドファスナー用成形部品。
- 脂肪族ポリアミドが脂肪族ジアミンと脂肪族ジカルボン酸の共縮重合によって得られる脂肪族ポリアミドを少なくとも1種含む請求項1~5の何れか一項に記載のスライドファスナー用成形部品。
- 脂肪族ポリアミドがナイロン6,6、ナイロン6,10、及びナイロン6,12よりなる群から選択される少なくとも1種を含む請求項1~6の何れか一項に記載のスライドファスナー用成形部品。
- 強化繊維がガラス繊維、炭素繊維及びアラミド繊維よりなる群から選択される少なくとも1種を含む請求項1~7の何れか一項に記載のスライドファスナー用成形部品。
- 表面の少なくとも一部が金属めっきされている請求項1~8の何れか一項に記載のスライドファスナー用成形部品。
- 請求項1~9の何れか一項に記載のスライドファスナー用成形部品を備えたスライドファスナー。
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US14/362,622 US10273360B2 (en) | 2011-12-27 | 2011-12-27 | Slide fastener provided with molded component |
PCT/JP2011/080335 WO2013098978A1 (ja) | 2011-12-27 | 2011-12-27 | スライドファスナー用成形部品及びそれを備えたスライドファスナー |
CN201180075628.2A CN103997927B (zh) | 2011-12-27 | 2011-12-27 | 拉链用成型部件及具备该部件的拉链 |
DE112011106039.4T DE112011106039B4 (de) | 2011-12-27 | 2011-12-27 | Formteil für Reißverschlüsse und mit diesem ausgestatteter Reißverschluss |
TW101144060A TWI527527B (zh) | 2011-12-27 | 2012-11-23 | 滑動式扣結件用成形零件及具備其之滑動式扣結件 |
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DE112016006849T5 (de) | 2016-05-13 | 2019-02-14 | Ykk Corp. | Polyamidharzzusammensetzung für einen Reißverschluss, Reißverschlusskomponente und damit versehener Reißverschluss |
US10717830B2 (en) | 2016-05-13 | 2020-07-21 | Ykk Corporation | Polyamide resin composition for slide fastener, slide fastener component, and slide fastener provided with same |
DE112016006849B4 (de) | 2016-05-13 | 2023-11-30 | Ykk Corp. | Polyamidharzzusammensetzung für einen Reißverschluss, Reißverschlusskomponente und damit versehener Reißverschluss |
US11174362B2 (en) | 2016-05-26 | 2021-11-16 | Ykk Corporation | Method of producing a film-attached resin base |
WO2017203668A1 (ja) * | 2016-05-26 | 2017-11-30 | Ykk株式会社 | めっき皮膜付き樹脂基材及びその製造方法、並びにめっき方法 |
WO2017203767A1 (ja) * | 2016-05-26 | 2017-11-30 | Ykk株式会社 | 皮膜付き樹脂基材及びその製造方法、並びに皮膜形成方法 |
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DE112011106039B4 (de) | 2023-08-10 |
US10273360B2 (en) | 2019-04-30 |
JPWO2013098978A1 (ja) | 2015-04-30 |
TW201340903A (zh) | 2013-10-16 |
DE112011106039T5 (de) | 2014-09-11 |
US20150017458A1 (en) | 2015-01-15 |
CN103997927A (zh) | 2014-08-20 |
CN103997927B (zh) | 2017-06-09 |
JP6002683B2 (ja) | 2016-10-05 |
TWI527527B (zh) | 2016-04-01 |
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