JP2013139286A - Hinge cap having film-like hinge containing plant-derived polyolefin - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a resin hinge cap having a film-like hinge mechanism in which the carbon offset property is provided, the durability and the operability are excellent, and the transport property of the cap is excellent in the cap fitting step.SOLUTION: A hinge cap includes a cap body, an overcap, and a film-like hinge mechanism for rockingly connecting the cap body to the overcap, and is integrally molded from a synthetic resin material containing polyolefin with the modern carbon ratio according to ASTM D6866-11 being 56.7-118pMC. The thickness of the film-like hinge at its end is larger than the thickness at a center part, and the position at which the thickness of the film-like hinge is minimum is present between the center part and the end. The hinge cap has the film-like hinge in which the hinge mechanism containing a plant-derived polyolefin consisting of a synthetic resin material containing 100-4,500ppm fatty acid amide (A) having cis-unsaturated carbon double bond.

Description

  The present invention relates to a cap capable of pouring the contents of a container without removing it from the container, and in particular, has a carbon offset property and contributes to reducing greenhouse gas emissions, and has a feature in a hinge mechanism used for the cap. The present invention relates to a hinge cap including a membrane hinge integrally formed from a synthetic resin material containing polyolefin.

  Containers are usually used for storing or transporting articles or materials. The contents of the container include various things such as viscous liquid materials such as mayonnaise, ketchup, sauce and jelly, liquid materials having relatively high fluidity such as juice and alcoholic beverages, and granular materials. There are a wide variety of container shapes in overall shape and partial shape, and metal, synthetic resin, rubber, paper, ceramics, glass, etc. are used as the material of the container, and these composites and laminates are also used. used.

  For example, as a synthetic resin material container, it is obtained by extruding a cylindrical parison made of synthetic resin material and then blow molding into the shape of the container in a molding die, or by injection molding. An injection-molded container is known. The layer structure of the synthetic resin material container includes a single layer container or a multilayer container, and the synthetic resin material includes polyolefins such as ethylene resins and propylene resins, polyesters such as polyethylene terephthalate, polyamides such as nylon, etc. Is used. As a multilayer plastic resin material container, polyolefin is used as the surface layer (outer layer and / or inner layer), and the intermediate layer has a multilayer structure with a barrier layer such as ethylene / vinyl alcohol copolymer (EVOH). Is widely used.

  Examples of the metal container include a container formed by winding a thin metal plate such as aluminum or steel into a substantially cylindrical shape, or a metal thick plate formed by deep drawing in a substantially cup shape. In addition, as the paper container, there is a paper container in which a plate-shaped paper material is wound to have a substantially cylindrical shape or a prism shape.

[Container recycling]
These various types of containers are being recycled and separated due to the majority of household waste in volume ratios and the growing public opinion of building a recycling-oriented society. Combined with the enactment of the Containers and Packaging Recycling Law and the Law for Promotion of Effective Utilization of Resources, the recycling rate of aluminum containers and PET bottles has improved, and the resource reuse rate has also improved.

  As these containers, a container (also referred to as “bottle”) having a neck having a smaller diameter than the trunk (hereinafter also referred to as “mouth neck”) is widely known. The part (refers to the upper part when the bottle is set upright) has an opening for filling or pouring the contents. A lid or cap (hereinafter sometimes collectively referred to as “cap”) having the same diameter as the neck (mouth neck) of the container is attached to the opening. As the material of the cap, metal, synthetic resin, paper or the like, or a composite material or laminated material thereof is used, and polyolefin is widely used as the synthetic resin. Caps are also subject to recycling under the Containers and Packaging Recycling Law, but resource reuse has not progressed as much as the container body. For example, caps made of synthetic resin materials are rarely burned. Absent.

[Carbon offset]
When a synthetic resin such as polyolefin, such as a cap made of a synthetic resin material such as polyolefin, is combusted, carbon dioxide is generated. Carbon dioxide is one of the gases that warm the global environment, that is, greenhouse gas (also called “green house gas”), and has continued to increase along with industrial activities by people, especially after the industrial revolution. . In order to maintain a global environment where human survival is sustainable, the concept of carbon dioxide that does not increase the total amount of carbon dioxide circulating in the earth's oceans and atmosphere is shared.

  Currently, most of synthetic resin materials, such as polyolefins, are produced using compounds derived from fossil fuels such as petroleum, coal and natural gas as starting materials. As is well known, fossil fuels contain carbon that has been fixed in the ground for many years. Combustion of a fossil fuel or a product derived from a compound derived from fossil fuel and releasing carbon dioxide into the atmosphere means that carbon that is fixed deep in the ground and does not exist in the atmosphere will Since it is suddenly released into the atmosphere as carbon, carbon dioxide in the atmosphere greatly increases, causing global warming.

  On the other hand, even if organisms (plants, animals) that grow by absorbing or changing carbon dioxide circulating in the global environment are burned in the earth's atmosphere and generate carbon dioxide, they exist in the global environment. Therefore, there is no change in the total amount of carbon constituting the carbon dioxide. This carbon entry / exit is said to be a state of carbon offset [(carbon offset)] or [carbon neutral (carbon neutral)], and is a carbon negative (carbon neutral) that increases carbon dioxide existing in the global environment. negative).

  Carbon that circulates in the global environment, and existing carbon is renewable carbon, modern carbon, contemporary carbon, bio-resourced carbon, biogenic carbon, biomass Carbon derived from fossil fuel, which is said to be the opposite electrode, called bio mass derived carbon, green carbon, atmospheric carbon, environmentally friendly carbon, or life-cycle carbon (fossil carbon, fossil fuel based carbon, petrochemical based carbon, carbon of fossil origin).

  In particular, plants are organisms that absorb carbon dioxide circulating in the global environment, undergo photosynthesis reactions that use carbon dioxide and water as raw materials, and grow into organisms, and thus are attracting attention as carbon sources. ing. For example, alcohol components, especially ethyl alcohol, are distilled and separated from fermented sugar or cellulose fermented products extracted from plant materials such as sugar cane and corn, and ethylene is obtained as an alkene by its dehydration reaction. Thus, an ethylene resin or an olefin resin can be obtained. Synthetic resins having this history are said to be carbon offset polyolefin, biogenic polyolefin, plant based resin, or the like.

Carbon constituting the carbon dioxide circulating in the global environment is radioactive carbon 14 (also referred to as “ ¹⁴ C”), which is an isotope, and stable carbon 12 (also referred to as “ ¹² C”). ) And metastable carbon 13 (sometimes referred to as “ ¹³ C”), the mass ratio of which is ¹² C (98.892 mass%), ¹³ C (1.18 mass%) and ¹⁴ It is well known that it is C (a trace amount of 1.2 × 10 ⁻¹⁰ mass%). The ratio between ¹² C and ¹³ C is stable. Also, radioactive ¹⁴ C is generated when neutrons contained in secondary cosmic rays generated by primary cosmic rays in the upper atmosphere collide with nitrogen atoms ( ¹⁴ N) in the atmosphere. Although it fluctuates slightly depending on the level of activity, etc., it continues to be supplied.

Living organisms (plants or animals) that continually breathe or absorb carbon dioxide circulating in the global environment and transform into organisms constitute carbon dioxide that circulates in the global environment during its lifetime 3 Continue to carry on mass proportions of different carbon isotopes. When an organism dies, the mass ratio of the carbon isotope of the kind inside the organism is fixed at the ratio at the time of death. The half-life of ¹⁴ C is 5730 years, and archaeological dating methods that use this to estimate the age of various samples are well known. On the other hand, ¹⁴ C in the fossil fuel formed after a long period of time has passed since the death of the organisms that lived in ancient times can be regarded as almost 0 (below the detection limit of the measuring instrument), so the synthetic resin derived from fossil fuels The inner ¹⁴ C can be regarded as almost zero.

Therefore, the plant-derived synthetic resin and the fossil fuel-derived synthetic resin can be distinguished by the ratio of ¹⁴ C contained. The time taken to harvest the growing plant, saccharify it into alcohol, and use ethylene, which is the alkene resulting from the dehydration reaction, as a raw material to produce a plant-derived synthetic resin through ordinary resin synthesis means. Is a few months, and can be neglected from the ¹⁴ C half-life of 5730 years. The time lag until the production of plant-derived synthetic resin is either plant-derived synthetic resin or fossil fuel-derived synthetic resin. There is no substantial effect on the discrimination.

The ratio of radioactive ¹⁴ C composing carbon dioxide circulating in the global environment has been diluted and reduced by humans burning large amounts of fossil fuels since the Industrial Revolution, but the atmosphere since 1950 AD It turned to increase by the inner core experiment. That is, the amount of radioactive ¹⁴ C produced by the nuclear test in the atmosphere exceeded the amount of radioactive ¹⁴ C produced by the nuclear reaction of ¹⁴ N. Subsequently, due to the 1964 nuclear test cessation treaty, the ratio of radioactive ¹⁴ C began to decrease after peaking in 1963, and there were fluctuations due to subsequent nuclear accidents, but the ratio of radioactive ¹⁴ C in 1950 Not reached.

Therefore, for the distinction between plant-derived synthetic resins and fossil fuel-derived synthetic resins, a standardization method based on the existence ratio of radioactive ¹⁴ C as of 1950 is known, and the National Bureau of Standards (NIST) ) According to ASTM D6866-11 (Determining the Biobased Control of Solid, Liquid, and Gaseous Samples Using Radiocarbon Analysis). ASTM D6866 is an ASTM (American Society for Testing and Materials) standard that determines the biogenic carbon concentration in solid, liquid, and gas samples using radiocarbon dating. Since it was approved, it has been revised and the current latest standard ASTM D6866-11 is the one revised in July 2011.

The principle defined by ASTM D6866-11 is roughly as follows. In other words, organic substances derived from fossil fuels have been killed or cut off by living organisms (animals and plants) in the era before 1950, and the ratio composition of carbon isotopes at that time is fixed. The abundance ratio of carbon constituting the organic substance is 0 (zero). Therefore, the ratio composition of carbon isotopes is derived from fossil fuel using the unit of modern carbon ratio (percent modern carbon: pMC) defined by the function of ¹³ C / ¹² C, which is a stable ratio, and radioactive ¹⁴ C. The organic material has a modern carbon ratio of 0 pMC (below the detection limit of the measuring instrument. However, organic substances derived from fossil fuels due to radioactive ¹⁴ C contamination derived from nuclear tests and nuclear accidents conducted after 1950 May show 0.01 to 0.03 pMC.) In addition, the standard substance of carbon abundance ratio as of 1950 [oxalic acid (SRM4990) supplied by NIST or equivalent organic substance] is set to 100 pMC. The ratio of the fossil fuel-derived organic substance and the plant-derived organic substance is determined by determining the modern carbon ratio of the sample on the basis of this 0 to 100% pMC. The modern carbon ratio of plant-derived synthetic resins currently produced does not fall below at least 103 pMC due to the influence of ¹⁴ C artificially increased by atmospheric nuclear tests conducted after 1950. The modern carbon ratio in 1963 before the nuclear test stop treaty was 118 pMC. Therefore, if the modern carbon ratio of the synthetic resin is 103 to 118 pMC, it can be said that the plant-derived synthetic resin is surely contained.

  Moreover, from the value of the modern carbon ratio of the known plant-derived synthetic resin, a synthetic resin material (a modern carbon ratio is 0 pMC) that is a mixture of the plant-derived synthetic resin and a fossil fuel-derived synthetic resin ( The content ratio of the plant-derived synthetic resin in the resin composition) can be calculated, and the mass ratio of the plant-derived synthetic resin may be described as “% Corg.renew”. For example, when the mass ratio of the plant-derived synthetic resin (modern carbon ratio: 104 pMC) and the fossil fuel-derived synthetic resin in the resin composition is 50:50, the resin composition is 50% Corg. renew and the modern carbon ratio is 52 pMC (calculated as 104 pMC × 0.50 = 52 pMC). When the mass ratio of the resin composition is 55:45, it is 55% Corg.renew, and the modern carbon ratio is calculated as 57.2 pMC (104 pMC × 0.55 = 57.2 pMC). ). As described above, the modern carbon ratio of the plant-derived synthetic resin does not fall below 103 pMC. Therefore, a synthetic resin material (resin composition) that is a mixture of a certain plant-derived synthetic resin and a synthetic resin derived from fossil fuel. If the modern carbon ratio of the product is 56.7 pMC or more, the modern carbon ratio of the plant-derived synthetic resin is 55 mass% or more (calculated as 56.7 pMC> 103 pMC × 0.55 = 56.65 pMC). You can say that.

  Resin products that use plant-derived synthetic resins and resin products that use synthetic resins derived from fossil fuels, in principle, differ only in the modern carbon ratio. Are considered to have no change or difference in handling. However, in reality, for example, it is also known that there may be a difference in compatibility and mechanical properties (Patent Document 1).

[Hinge cap]
Caps attached to the opening of the bottle include those that are removed from the container in order to pour out the contents of the container, and those that can be poured out without being removed from the container.

  As shown in FIG. 1, the cap body (1) attached to the mouth-and-neck portion of the container and the overcap covering the top of the cap body (as shown in FIG. 1) can be poured out without removing from the container. 2) and a hinge cap provided with a hinge mechanism (3) for connecting the overcap (2) to the cap body (1) so as to be swingable between a closed state and an open state. ing. In general, the inner peripheral surface of the cap body (1) is provided with a screw portion (1a) for screwing with the outer peripheral surface of the mouth neck portion of the container, and the outer peripheral surface is knurled to prevent slipping ( It is also referred to as “notch processing” (not shown).

  The hinge cap swings the overcap (2) about the swing axis of the hinge mechanism (3) to open the cover, as shown in FIG. A spout (4) for pouring the contents can be formed. Such a hinge cap is widely used as a container cap for liquid seasonings and the like in recent years because it is not necessary to remove the entire cap from the container when the contents of the container are poured out. It can be integrally molded from a synthetic resin material such as polyolefin.

  As the hinge mechanism (3) of the hinge cap, in addition to a so-called three-point hinge mechanism as described in Patent Document 2, a film-like hinge mechanism described in Patent Documents 3 to 6 is known. The widely used three-point hinge mechanism includes a hinge body that rotatably supports the overcap (2) with respect to the cap body (1), and a pair of elastic pieces disposed on both sides of the hinge body. It is a hinge mechanism.

  On the other hand, the hinge mechanism (3) of the membrane hinge (hereinafter, sometimes referred to as “membrane hinge (3)”) has the caps corresponding to both ends as shown in FIGS. A thin film or a thick film connected to the outer peripheral surface of the main body (1) and the outer peripheral surface of the overcap (2) to connect the cap main body (1) and the overcap (2) to each other so as to be swingable. A film-like body having a shape with a remarkably large area relative to the thickness, such as a film-like or sheet-like shape (hereinafter, these shapes are collectively referred to as “film-like”) is provided as a main part of the hinge mechanism. It is a hinge mechanism. In the illustrated example, the film-like hinge (3) is composed only of the film-like hinge body (3a) and does not include the elastic piece provided in the three-point hinge mechanism. The hinge body (3a) for connecting the cap body (1) and the overcap (2) so as to be able to swing has a thick part (3b), from both sides (3c) of the hinge body (3a). It extends to a region sandwiched between the thick portions (3b). The membrane hinge (3) is configured such that an unstable equilibrium position (dead center position), which will be described later, exists when the overcap (2) is opened and closed, and on both sides of the unstable equilibrium state, the overcap (2 The elasticity necessary for the opening and closing of) can be generated.

  That is, in the membrane hinge (3), when the overcap (2) is swung from the open state to the closed state, the overcap (2) is a predetermined position ("dead point" or "thought point"). The film-like hinge (3) is gradually extended until it reaches (), and in this process, an appropriate resistance is felt to swing the overcap (2). When the overcap (2) exceeds the thought point (dead point), the membrane hinge (3) contracts by its own elastic restoring force and pulls the overcap (2) in the direction of the closed state. When the overcap (2) exceeds the thought point (dead point), the resistance (click feeling), when moving from the thought point to the closed state, or from the thought point (dead point) to the open state The operation characteristic (snap property) at the time of performing is determined by the elastic coefficient, size, elongation amount, etc. of the membrane hinge (3). If the tensile force at the thought point (dead point) has a certain level, it is considered that the snapping property or the click feeling is good. If the tensile force at the thought point (dead point) is too small, the overcap (2) may not be clearly opened and closed, and the overcap (2) may not be reliably closed. On the other hand, if the tensile force at the thought point (dead point) is too large, it may be difficult to open and close the overcap (2), and in some cases, the membrane hinge (3) may be damaged, In some cases, the vicinity of the connecting portion between the outer peripheral surface of the cap body (1) and / or the outer peripheral surface of the overcap (2) of the cylindrical hinge (3) may be damaged.

  In order to improve or adjust the snapping property or click feeling of the membrane hinge (3), the thickness of the membrane hinge (3) is made uneven, or a thick portion is provided on a part of the membrane hinge (3). In addition, a refracting part, a thin part, a slit or a slack is provided on a part of the film-like hinge (3). In many cases, the strength of the connecting portion can be increased by using the connecting portion between the outer peripheral surface of the cap body (1) and / or the outer peripheral surface of the overcap (2) as the thick-walled portion. Has been done. Further, the film-like hinge (3) tends to have non-uniform elongation and stress distribution on the side close to the cap body (1) and / or the overcap (2) and other locations. . Further, the membrane hinge (3) is twisted and locally stress concentrated depending on the connection position of the membrane hinge (3) to the cap body (1) and / or the overcap (2) and the shape of the connection portion. Sometimes. The twist, large stress and stress concentration of the membrane hinge (3) may cause early fatigue breakage of the membrane hinge (3) and may shorten the usage period of the hinge cap.

  In order to suppress twisting of the membrane hinge (3), the entire membrane hinge (3) protrudes outward from the side surfaces of the overcap (2) and the cap body (1), or a large stress is generated. However, the thickness and area of the membrane hinge (3) may be increased so that the durability is maintained. However, when the membrane hinge (3) is protruded, or when the thickness or area of the membrane hinge (3) is increased, the fingertip hits the membrane hinge (3) and the operability of the cap is impaired. There is.

  On the other hand, hinge caps, like many other types of lids and caps, use the contents in the containers in the manufacturing process of containers filled with the contents (hereinafter sometimes referred to as “filled containers”). After filling, it is attached to the mouth and neck of the container. As an apparatus for attaching a cap to a container, for example, an apparatus as shown in FIG. 6 is known (Patent Document 7). In this apparatus, caps (c) sequentially fed from a cap supply unit (hereinafter sometimes referred to as “hopper”) not shown are aligned by cap supply means (d) such as an inclined chute. The caps (c) are transferred to the capper (e) one by one through the cap support device (D) that is a transfer device. The capper (e) grips the cap (c) with the gripper (f), moves to above the filling container (b), and then moves the cap (c) gripped by the gripper (f) to the filling container (b). The cap (c) is fitted or screwed to the mouth and neck while being brought into contact with the mouth and neck. Next, usually, the cap (c) held by the gripper (f) is rotated, so that the cap (c) is screwed into the mouth-neck portion of the filling container (b) and attached to the mouth-neck portion, and the gripper (f ) Is released from the cap (c), and the filled container (b) to which the cap (c) is attached is manufactured. As the cap supply means (d), in addition to the inclined one shown in the figure, one that supplies the cap (c) almost vertically, one that supplies the cap (c) by rotating the sprocket or gear, Various devices are known, such as those that transport c) in parallel and those that transport caps (c) stacked one above the other, and have various diameters, shapes, or lengths, such as chutes. Are known.

  In recent years, in order to improve productivity, the speed of manufacturing apparatuses for filling containers has been increased, and the apparatus for attaching the cap (c) to the containers is also required to increase the operation speed. Accordingly, in the cap supply means (d), the cap (c) is required to be transferred while being aligned quickly and reliably.

  The hinge cap including the cap body (1), the overcap (2), and the hinge mechanism (3) is normally supplied and transferred in the cap supply means (d) in a closed state. Since the hinge cap is provided with a hinge mechanism (3) for slidably connecting the cap body (1) and the overcap (2) in addition to the cap body (1) and the overcap (2), The cap (c) has a protrusion or protrusion. In the cap supply means (d), the cap (c) may come into contact with or get caught by the inner surface of the cap supply means (d). In addition, the hinge mechanisms (3) of the plurality of hinge caps may come into contact with each other or get caught, and it may be difficult to perform quick and reliable alignment and transfer.

  For the hinge cap in which the hinge mechanism (3) is a membrane hinge, the entire membrane hinge (3) protrudes outward from the side surfaces of the overcap (2) and the cap body (1), or the membrane hinge Since the area of (3) may be increased, it may be more difficult to transfer the cap (c) while aligning it quickly and reliably in the cap supply means (d). Therefore, in the case of a hinge cap in which the hinge mechanism (3) is a membrane hinge, in addition to the problem described above that the fingertip hits the hinge mechanism (3) and impairs the operability of the cap, In addition, it is difficult to reliably align and slide, and the posture and position of the cap (c) delivered to the capper (e) is out of a predetermined range. And the cap (c) supply to the capper (e) is delayed, and the production device for the filling container (b) may be stopped. However, there is also a need for a solution for good transportability in cap supply.

  On the other hand, for synthetic resin material containers such as polyolefin, a lubricant (slip agent) is added to the raw material resin such as polyolefin in order to improve the slipperiness of the inner and outer surfaces of the container when the container is used or when the container is manufactured. (Patent Document 8). The lubricant is usually added to a raw material resin by a master batch method or kneaded. When the synthetic resin material container is a multilayer container, a lubricant is often added to the surface layer (outermost layer or innermost layer). As the lubricant, for example, fatty acid amide is widely used, and specifically, oleic acid amide, stearic acid amide, behenic acid amide (behenic acid amide) and the like are used. These lubricants have been used in a mixture of two or more.

JP 2011-132525 A Japanese Patent Laid-Open No. 9-66955 Japanese Examined Patent Publication No. 63-17707 JP 2005-8209 A JP 2006-89068 A Utility Model Registration No. 2524636 JP-A-8-119386 Japanese Patent Laid-Open No. 6-72422

  An object of the present invention is to have a carbon offset property, and has a moldability comparable to that of a hinge cap including a film-like hinge integrally formed from a synthetic resin material containing a synthetic resin derived from fossil fuel, and has a snapping property. A membrane formed integrally from a synthetic resin material containing a synthetic resin derived from a plant, which has good durability and operability, and has good transferability in cap supply in the step of attaching a cap to a container. It is to provide a hinge cap including a hinge.

  As a result of earnest research on solving the above-mentioned problems, the present inventors have made the composition of the synthetic resin material forming the hinge mechanism specific in the hinge cap formed integrally from the synthetic resin material, It has been found that the problem can be solved by setting the thickness of the membrane hinge to a specific one, and the present invention has been completed.

That is, according to the present invention, the cap body attached to the neck of the container, the overcap covering the top of the cap body, and the overcap with the cap body in a closed state and an open state A hinge cap integrally formed from a synthetic resin material, which includes a polyolefin mechanism having a modern carbon ratio of 56.7 to 118 pMC as defined in ASTM_D6866-11. And the following a) to c):
a) The hinge mechanism is a hinge mechanism of a membrane hinge in which both end portions are coupled along the outer peripheral surface of the cap body and the outer peripheral surface of the overcap, respectively.
b) The membrane hinge is
b-1) The thickness at the end is greater than the thickness at the center of the membrane hinge,
b-2) A position where the thickness of the membrane hinge is minimized exists between the central portion and the end portion, and
c) The hinge mechanism is made of a synthetic resin material containing 100 to 4500 ppm of fatty acid amide (A) having an unsaturated cis structure carbon double bond.
A hinge cap comprising a membrane hinge containing a plant-derived polyolefin is provided. In the present invention, “molded integrally from a synthetic resin material” is usually used for molding a synthetic resin in addition to a plant-derived polyolefin alone or a plant-derived polyolefin and a fossil fuel-derived polyolefin. This means that it is integrally molded from a synthetic resin material (hereinafter sometimes referred to as “resin material” or “resin composition”) containing additives, compounding agents, and the like.

Moreover, according to this invention, a hinge cap provided with the membrane hinge of the following (1)-(11) is provided as an embodiment.
(1) The cap body, the overcap, and the hinge mechanism contain the plant-derived polyolefin comprising a synthetic resin material containing 100 to 4500 ppm of fatty acid amide (A) having an unsaturated cis structure carbon double bond. A hinge cap comprising a membrane hinge.
(2) The fatty acid amide (A) having the unsaturated cis structure carbon double bond is the following (A ₁ ), (A ₂ ) and (A ₃ ):
(A ₁ ) H ₂ N—CO — (— CH ₂ —) _n —CH═CH — (— CH ₂ —) _n —CH ₃ (where n is an integer in the range of 6 ≦ n ≦ 10);
(A ₂ ) H ₂ N—CO — (— CH ₂ —) _m−2 —CH═CH — (— CH ₂ —) _m —CH ₃ (where m is an integer in the range of 6 ≦ m ≦ 10) And (A ₃ ) H ₂ N—CO — (— CH ₂ —) _{k + 4} —CH═CH — (— CH ₂ —) _k —CH ₃ (where k is an integer in the range of 6 ≦ k ≦ 10); ;
A hinge cap comprising a membrane hinge containing the plant-derived polyolefin containing at least one fatty acid amide represented by one formula selected from the group consisting of:
(3) The fatty acid amide (A) having an unsaturated cis structure carbon double bond is the fatty acid amide represented by the formula (A ₁ ), and the (A ₂ ) or (A ₃ ) A hinge cap comprising a membrane hinge comprising the plant-derived polyolefin which is a mixture with at least one fatty acid amide represented by the formula.
(4) A hinge cap comprising a membrane-like hinge, wherein m in the fatty acid amide represented by the formula (A ₂ ) is m = n + 1 or m = n−1.
(5) A hinge cap comprising a membrane-like hinge containing the plant-derived polyolefin, wherein k in the fatty acid amide represented by the formula (A ₃ ) is k = n.
(6) The fatty acid amide (A) having an unsaturated cis structure carbon double bond is represented by the above formula (A ₁ ) and the following (A ₁₁ ):
(A ₁₁ ) H ₂ N—CO — (— CH ₂ —) _j —CH═CH — (— CH ₂ —) _j —CH ₃ (where j is an integer in the range of 6 ≦ j ≦ 10, j ≠ n.);
A hinge cap comprising a membrane hinge, comprising the plant-derived polyolefin, which is a mixture with a fatty acid amide represented by the formula:
(7) The above-mentioned plant origin, wherein the fatty acid amide (A) having an unsaturated cis structure carbon double bond contains a compound having 2 to 4 bonds of unsaturated cis structure carbon double bonds in the molecular structure A hinge cap comprising a membrane hinge containing a polyolefin.
(8) The synthetic resin material containing the fatty acid amide (A) having an unsaturated cis-structured carbon double bond includes a membrane hinge containing the plant-derived polyolefin further containing a saturated fatty acid amide. Hinge cap.
(9) A hinge cap comprising a membrane hinge, wherein the plant-derived polyolefin contains the plant-derived polyolefin, which is a plant-derived ethylene resin.
(10) A hinge cap comprising a membrane hinge containing the plant-derived polyolefin heat-fixed in a closed state.
(11) A hinge cap comprising a membrane hinge, wherein the membrane hinge contains the plant-derived polyolefin having a thick part.

According to the present invention, the cap body attached to the mouth and neck of the container, the overcap covering the top of the cap body, and the overcap between the closed state and the open state with respect to the cap body A hinge cap integrally formed from a synthetic resin material, comprising a hinge mechanism that is swingably connected, and containing a polyolefin having a modern carbon ratio of 56.7 to 118 pMC as defined in ASTM_D6866-11. The following a) to c):
a) The hinge mechanism is a hinge mechanism of a membrane hinge in which both end portions are coupled along the outer peripheral surface of the cap body and the outer peripheral surface of the overcap, respectively.
b) The membrane hinge is
b-1) The thickness at the end is greater than the thickness at the center of the membrane hinge,
b-2) A position where the thickness of the membrane hinge is minimized exists between the central portion and the end portion, and
c) The hinge mechanism is made of a synthetic resin material containing 100 to 4500 ppm of fatty acid amide (A) having an unsaturated cis structure carbon double bond.
By being a hinge cap having a membrane-like hinge containing a plant-derived polyolefin, it is integrally molded from a synthetic resin material having a carbon offset property and containing a synthetic resin derived from fossil fuel. It has a moldability comparable to that of a hinge cap provided with a membrane hinge, has good snapping, durability and operability, and has good transportability in cap supply in the process of attaching a cap to a container. There is an effect that it is possible to provide a hinge cap provided with a membrane hinge integrally formed from a synthetic resin material containing a plant-derived synthetic resin.

It is a partial cross section side view which shows the hinge cap provided with the membrane hinge containing the plant-derived polyolefin of this invention in a closed state. It is a partial cross section side view which shows the hinge cap provided with the membrane hinge containing the plant origin polyolefin of this invention in an open state. It is a top view in the open state of the hinge cap provided with the membrane hinge containing the plant-derived polyolefin of this invention. FIG. 4 is an enlarged plan view showing an example of a membrane hinge of the hinge cap of FIG. 3. It is sectional drawing which follows an II line | wire of FIG. 4 which shows an example of a film-like hinge. 1 is a schematic diagram of a specific example of a device for attaching a cap to a container.

I. Hinge Cap A hinge cap comprising a membrane-like hinge containing the plant-derived polyolefin of the present invention comprises a cap body (1) attached to the mouth and neck of the container, and an overcap (2) covering the top of the cap body (1). And a plant-derived polyolefin comprising a hinge mechanism (3) for connecting the overcap (2) to the cap body (1) so as to be swingable between a closed state and an open state. It is a hinge cap provided with the membrane hinge integrally molded from the synthetic resin material to contain. In describing the present invention with reference to the drawings, the same numbers and symbols in the drawings as those used in the description of the prior art are used.

1. Cap body The cap body (1) attached to the mouth and neck of the container is a cup-like member that is directly attached to the mouth and neck of the container by fitting or screwing. As shown in FIGS. 1 and 2, the cap body (1) usually further includes a substantially cylindrical portion surrounding the mouth and neck portion, and a top plate portion that abuts on the tip surface (upper end) of the mouth and neck portion. Also good. An opening is formed at the center of the top plate portion, and this opening forms a spout (4) for pouring the contents of the container. A substantially cylindrical member may protrude from the top plate portion of the cap body (1) so as to surround the spout (4), thereby facilitating pouring the contents of the container. In addition, from the viewpoint of preventing the contents of the container from being spoiled, an oxygen gas barrier single layer or multilayer sheet or film (not shown) is provided on the inner surface of the top plate portion that is in contact with the contents of the container as necessary. May be provided. A screw part (1a) is provided on the inner peripheral surface of the cap body (1) to be screwed with the outer peripheral surface of the mouth neck of the container, and the outer peripheral surface is subjected to knurling (notching) to prevent slipping. Also good.

  The size of the cap body (1) in the hinge cap having a membrane hinge containing the plant-derived polyolefin of the present invention is not particularly limited. Usually, the substantially cylindrical portion surrounding the mouth-and-neck portion has a diameter (outer diameter). And the inner diameter) is about 10 to 80 mm and the height is about 5 to 50 mm, and the sizes of the overcap (2) and the hinge mechanism (3) are determined according to the size of the cap body (1). Can do.

2. Overcap The overcap (2) that covers the top of the cap body (1) covers the top plate of the cap body (1) and closes the spout (4). And is swingably attached to the cap body (1). As shown in FIGS. 1 and 2, the inner surface of the overcap (2) (the surface on the cap body (1) side in the closed state in FIG. 1) is formed on the top plate portion of the cap body (1) when the lid is closed. A cylindrical member that is fitted in the opened opening and prevents the contents of the container from leaking from the spout (4) may be provided. Further, in order to maintain the overcap (2) in the closed state, a locking means (not shown) may be provided. Although the locking means is not limited, for example, a locking ring is provided on the outer peripheral portion of the top plate portion of the cap body (1), and the inner peripheral surface of the overcap (2) is locked using elastic deformation. You may make it become.

3. Hinge mechanism In a hinge cap having a membrane hinge containing the plant-derived polyolefin of the present invention, the overcap (2) is rocked between the closed state and the open state with respect to the cap body (1). The hinge mechanism (3) that is movably connected is a hinge mechanism of a membrane hinge. Both ends of the membrane hinge (3) are connected along the corresponding outer peripheral surface of the cap body and the outer peripheral surface of the overcap.

  As shown schematically in FIGS. 3 and 4, the membrane hinge (3) is connected from the outer peripheral surface of the cap body to the outer peripheral surface of the overcap, to which both ends of the membrane hinge (3) are respectively coupled. It is preferable that the film-like hinge main body (3a) extending over the thickness has the thick part (3b). In the example schematically shown in FIGS. 3 and 4, the thick wall portion (3b) includes the outer peripheral surface of the cap body (1) and the outer periphery of the overcap (2) to which both ends of the membrane hinge (3) are respectively coupled. It is provided along a substantially central portion of the surface (hereinafter sometimes referred to as “the central portion of the coupling portion of the membrane hinge (3)”), but the overcap (2) is closed and opened. It can also be provided in the vicinity of both ends in the swing axis direction between the two. Since the hinge body (3a) has the thick part (3b), the strength of the both ends of the membrane hinge (3) can be secured and the twisting of the both ends can be prevented. The meat part (3b) is not essential. The thickness, area, contour shape, cross-sectional shape, etc. of the hinge body (3a), and the position, thickness, width, length (area), contour shape, cross-sectional shape, etc. of the thick part (3b) should be changed as appropriate. However, the area of the hinge body (3a) is at least 10 times, preferably 12 times or more, more preferably 15 times or more with respect to the area of the thick part (3b). (3a) constitutes the main part of the membrane hinge (3). Therefore, in the present invention, the thickness of the membrane hinge (3) usually means the thickness of the hinge body (3a).

4). Hinge body The hinge body (3a) of the membrane hinge (3) of the hinge cap of the present invention extends from both side portions (3c), and both ends of the membrane hinge (3) are joined to each other. It is a film-like hinge body (3a) extending from the outer peripheral surface of the cap body (1) to the outer peripheral surface of the overcap (2). In FIG. 3, the shape of a sectional view including the axis of the drum used in Japanese music (hereinafter, sometimes referred to as “cross-sectional shape”), which is the simplest contour shape, is used as the hinge body (3 a). Show. Both end portions in the axial direction of the cross-sectional shape of the drum (corresponding to both side portions (3c) of the hinge body (3a)) are substantially linear, and both side surfaces of the cross-sectional shape of the drum are substantially arc-shaped. . Both side surface portions of the cross-sectional shape of the drum are both end portions of the membrane hinge (3), and form arcs along the outer peripheral surface of the cap body (1) and the outer peripheral surface of the overcap (2), respectively. Are connected. However, the shape of the joint portion between the hinge main body (3a) and the outer peripheral surface of the cap main body (1) and / or the outer peripheral surface of the overcap (2) is not required to form an arc, and the cap main body (1 ) Or one or a plurality of linear shapes along the outer peripheral surface of the overcap (2).

  The contour shape of the hinge body (3a) of the membrane hinge (3) is not particularly limited, and various contour shapes can be adopted. For example, both end faces [both side portions (3c)] of the cross-sectional shape of the drum may be concavely curved, or may be convexly curved if desired. Further, in order to improve or adjust the snapping property or click feeling of the membrane hinge (3), or to increase the strength of the connecting portion, the thickness of the hinge body (3a) is made uneven, or the hinge body ( A part of 3a) can be provided with a refracting part, a thin part, a slit or a slack. For example, depending on the position, size, and contour shape of the thin part, the size of the maximum tensile force felt when opening and closing the lid, the position where the maximum tensile force is felt, the time when the tensile force is felt, etc. Snap or click feeling can be adjusted. The same can be said by changing the contour shape, the refracting portion, the slit or the slack of the hinge body (3a).

  Furthermore, the snapping property or the click feeling can also be adjusted by changing the cross-sectional shape of the hinge body (3a) of the membrane hinge (3). FIG. 5 is a cross-sectional view taken along the line II of FIG. 4 showing an example of a membrane hinge. (Note that FIG. 5 is a conceptual diagram for explaining the gist, and dimensions and scales are not actual dimensions.) The hinge main body (3a) has an outer peripheral surface of the cap main body (1) or an overcap (2 ) Is larger than the thickness at the central portion of the hinge body (3a). That is, the thickness of the film hinge (3) at the end is larger than the thickness at the center of the film hinge. Further, the position where the thickness of the hinge main body (3a), that is, the thickness of the membrane hinge (3) is minimized exists between the central portion and the end portion.

  In the thickness of the hinge main body (3a) which is the thickness of the membrane hinge (3), the thickness of the hinge main body (3a) at the end is made larger than the thickness at the center, whereby the stress distribution of the hinge main body (3a) is It becomes uniform and the durability of the hinge body (3a) and the membrane hinge (3) is improved. Needless to say, the ratio of the thickness at the end of the hinge body (3a) to the thickness at the center (hereinafter sometimes referred to as “end / center thickness ratio”) is greater than 1, but usually 1. It is appropriate to define the shape of the hinge body (3a) to be in the range of 05 to 5, and the ratio is preferably 1.07 to 4, more preferably 1.1 to 3.5, and still more preferably. It is the range of 1.12-3. If the ratio is too small, the stress applied to the end of the membrane hinge (3) increases, and the durability of the hinge body (3a) and the membrane hinge (3) may be reduced. If the ratio is too large, the central portion of the hinge body (3a) cannot withstand stress, and the durability of the hinge body (3a) and the membrane hinge (3) may be reduced. If the thickness at the end of the membrane hinge (3) is not greater than the thickness at the center of the membrane hinge (3), the snapping property or click feeling will not be pleasant, and the strength of the connecting portion will be insufficient. This may cause early fatigue breakage of the membrane hinge (3) and shorten the usage period of the hinge cap.

  Moreover, since the position where the thickness of the hinge main body (3a), which is the thickness of the membrane hinge (3), is minimum is present between the center and the end of the hinge main body (3a), the overcap (2 ) Has a good snapping or clicking feeling when rocking. That is, by adjusting the position where the thickness of the hinge body (3a) is minimum and / or the ratio of the minimum thickness of the hinge body (3a) to the thickness of the central portion of the hinge body (3a), The tensile force can be adjusted, the snapping property or the click feeling when the overcap (2) is swung can be optimized, and the durability of the hinge cap is improved. Needless to say, the ratio of the minimum thickness of the hinge body (3a) to the thickness of the central portion of the hinge body (3a) (hereinafter sometimes referred to as “minimum portion / central thickness ratio”) is less than 1. It is appropriate to determine the shape of the hinge body (3a) so that it is usually in the range of 0.55 to 0.9, and the ratio is preferably 0.6 to 0.85, more preferably 0. .62 to 0.8, more preferably in the range of 0.65 to 0.75. If the ratio is too small, the change in tensile force when the overcap (2) is swung is not smooth, and a sense of discomfort may be felt. If the ratio is too large, the change in tensile force when the overcap (2) is swung may be monotonous and the snapping property or click feeling may not be good. The ratio of the distance from the center of the hinge body (3a) to the distance between the center and the end of the hinge body (3a) at the position where the thickness of the hinge body (3a) is minimum (hereinafter referred to as “thickness”). It is appropriate to determine the shape of the hinge body (3a) so that it is 0.001 or more and less than 1 and is usually in the range of 0.05 to 0.95. The ratio is preferably in the range of 0.1 to 0.9, more preferably 0.2 to 0.8, and still more preferably 0.3 to 0.7. If the ratio is too small, the position at which the thickness of the hinge body (3a) is minimum is too close to the central portion of the hinge body (3a), so the change in tensile force when the overcap (2) is swung. May be monotonous and have poor snapping or clicking feeling. If the ratio is too large, the position where the thickness of the hinge body (3a) is minimum is too close to the end of the hinge body (3a) where a large stress is generated when the overcap (2) is swung. There exists a possibility that durability of a hinge main body (3a) and a film-like hinge (3) may fall.

5. Thick part As for the membrane hinge (3) in the hinge cap of this invention, it is preferable that the hinge main body (3a) has a thick part (3b). In the present invention, the thick part (3b) means a part having an average thickness of 1.5 times or more with respect to the average thickness of the hinge body (3a), and the cap body (1) and the overcap (2). As long as the hinge mechanism (3) has excellent click feeling, snap feeling and durability, as described above, the position, thickness, and width of the thick part (3b) The length (area), the contour shape, the cross-sectional shape, and the like can be changed as appropriate. That is, as shown in FIG. 3 and FIG. 4, in addition to a substantially rectangular contour shape, a contour shape such as a polygon, an ellipse, or a circle may be used, and the cross-sectional shape may be a plateau with a flat top surface. The shape may be a truncated pyramid, or the top surface may be uneven. Further, the position of the thick portion (3b) is not limited to the central portion of the coupling portion of the illustrated membrane hinge (3), the adjacent portion of the central portion of the coupling portion of the membrane hinge (3), and the membrane shape. The hinge (3) can be positioned in the vicinity of both end portions in the swing axis direction between the closed state and the open state of the overcap (2), an intermediate position thereof, or the like.

II. Hinge cap integrally molded from a synthetic resin material containing a plant-derived polyolefin The hinge cap comprising a membrane-like hinge containing a plant-derived polyolefin of the present invention comprises a cap body (1), an overcap (2), And a hinge cap integrally formed from a synthetic resin material comprising a polyolefin having a modern carbon ratio of 56.7 to 118 pMC as defined in ASTM D6866-11, comprising a hinge mechanism (3). As described above, “synthetic resin material” means a resin material containing additives, compounding agents, and the like in addition to polyolefin.

  The composition of the synthetic resin material containing the plant-derived polyolefin forming the cap body (1), the overcap (2), and the hinge mechanism (3) may be the same or different. From the viewpoint of handleability and the like, the same composition is preferable. Further, the composition of the synthetic resin material may be the same or uniform for each of the cap body (1), the overcap (2), and / or the hinge mechanism (3). It may be of uniform composition. A so-called gradient material in which the composition of the resin continuously changes may be used. For example, the composition of the hinge body (3a) and the thick part (3b) of the hinge mechanism (3) may be the same or different. The cap body (1), the overcap (2), or the hinge mechanism (3) may be a single layer, or may be laminated by an in-mold label forming method or the like.

1. Synthetic Resin Material Containing Plant-Derived Polyolefin A hinge cap comprising a membrane-like hinge containing the plant-derived polyolefin of the present invention is a polyolefin having a modern carbon ratio of 56.7 to 118 pMC as defined in ASTM D6866-11 It is integrally molded from a synthetic resin material containing

  In general, synthetic resins derived from plants are roughly divided into two. First, polylactic acid, which is a biodegradable resin obtained from lactic acid derived from corn, nylon 610 obtained by using sebacic acid derived from castor oil, polyurethane, and glucose obtained by degrading with basic solution Using as a starting material a plant-derived compound that is difficult to synthesize artificially using conventional petrochemistry, such as polytrimethylene terephthalate obtained using 1,3-propanediol derived from The resulting synthetic resin. Second, a compound that can be artificially synthesized using a manufacturing plant that uses a conventional resin synthesis process, for example, an alkene through a dehydration reaction of an alcohol derived from a fossil fuel, a raw material that is a plant-derived compound, For example, it is a synthetic resin obtained using a starting material that is replaced with an alkene through a dehydration reaction of a plant-derived alcohol. For example, plant-derived ethylene or propylene is produced through an alcohol dehydration reaction using ethyl alcohol obtained from a fermented sugar or a cellulose fermented product extracted from a plant raw material such as sugarcane or corn, and the plant-derived ethylene It is a synthetic resin such as polyethylene and polypropylene obtained using propylene and propylene as a starting material, and is a synthetic resin having no biodegradability. The latter is preferable as a measure against global warming because it converts a carbon-negative synthetic resin derived from fossil fuel into a plant-derived carbon neutral or synthetic resin that contributes to carbon offset.

  A hinge cap comprising a membrane-like hinge containing a plant-derived polyolefin of the present invention, as a plant-derived synthetic resin, is easy to obtain, moldability, mechanical properties, and viewpoints of properties required for the hinge cap, From the viewpoint of contribution to carbon offset, plant-derived polyolefins such as plant-derived ethylene resins and plant-derived propylene resins, preferably plant-derived ethylene resins are used.

[Plant-derived polyolefin]
The plant-derived polyolefin that can be contained in the hinge cap provided with the membrane hinge of the present invention is a homopolymer or copolymer of olefin-based monomers of plant-derived alkenes such as plant-derived ethylene, propylene, butene, and pentene. It is a coalescence.

[Plant-derived ethylene resin]
The plant-derived ethylene-based resin is a plant-derived ethylene homopolymer or a plant-derived ethylene copolymer mainly composed of plant-derived ethylene, and the copolymer is a plant-derived ethylene. And other plant-derived alkenes and / or other plant-derived unsaturated monomers. Preferred plant-derived ethylene-based resins include plant-derived high-density polyethylene and plant-derived low-density polyethylene.

Plant-derived high-density polyethylene is generally plant-derived polyethylene having a density of 0.942 g / cm ³ or more. Usually, it is polyethylene derived from a plant having a density of 0.980 g / cm ³ or less, preferably 0.945 to 0.970 g / cm ³ , more preferably 0.948 to 0.965 g / cm ³ . The density of the plant-derived polyethylene is measured in accordance with JIS K6922-2. The plant-derived high-density polyethylene has an MFR (measured at a temperature of 190 ° C. and a load of 21.18 N) of usually 1 to 100 g / 10 minutes, preferably 5 to 80 g / 10 minutes, more preferably 10 to 50 g / 10. Minutes can be used. In addition, MFR of polyethylene derived from a plant is measured based on JIS K6922-2. The plant-derived high-density polyethylene can be a synthetic product, but can also be selected from commercially available products. Commercially available products include plant-derived high-density polyethylene belonging to Green Polyethylene manufactured by Brasschem (Brazil).

The plant-derived low density polyethylene is generally a plant-derived polyethylene having a density of 0.910 to 0.930 g / cm ³ , preferably 0.912 to 0.928 g / cm ³ . The plant-derived low-density polyethylene has an MFR (measured at a temperature of 190 ° C. and a load of 21.18 N) of usually 1 to 100 g / 10 minutes, preferably 5 to 80 g / 10 minutes, more preferably 10 to 50 g / 10. Minutes can be used. As plant-derived low-density polyethylene, plant-derived high-pressure polyethylene (soft polyethylene) obtained by using a so-called Ziegler-Natta catalyst, plant-derived linear low-density polyethylene (LLDPE), etc. Copolymers of ethylene and other olefins derived from plants can also be used. As plant-derived low-density polyethylene such as plant-derived linear low-density polyethylene, synthetic products can be used, but commercially available products may be used. Examples of commercially available products include plant-derived linear low-density polyethylene belonging to Green Polyethylene manufactured by Brasschem.

  As is well known, it should be noted that there is no direct relationship between a plant-derived synthetic resin and a biodegradable synthetic resin. For example, polylactic acid (not belonging to plant-derived polyolefin), which is a plant-derived synthetic resin, is commercially available as NatureWorks (registered trademark) PLA manufactured by NatureWorks, and is also known as a biodegradable resin. .

  The hinge cap including a membrane-like hinge containing a plant-derived polyolefin of the present invention contains a polyolefin having a modern carbon ratio of 56.7 to 118 pMC defined in ASTM D6866-11 in a synthetic resin material. That is, it is a hinge cap having a membrane hinge containing a plant-derived polyolefin. Specifically, the hinge cap including a membrane-like hinge containing a plant-derived polyolefin of the present invention is a polyolefin containing 55% by mass or more of a plant-derived polyolefin in a synthetic resin material, that is, 55% Corg. It means a synthetic resin material containing polyolefin that is more than renew.

  The fact that the polyolefin in the synthetic resin material contains 55% by mass or more of plant-derived polyolefin was calculated with a modern carbon ratio of 56.7 pMC (103 pMC × 0.55 = 56.65 pMC as described above). It was determined based on the results.) That is, when the hinge cap having a membrane hinge containing a plant-derived polyolefin of the present invention contains a plant-derived polyolefin and a fossil fuel-derived polyolefin as the polyolefin in the synthetic resin material, Since the modern carbon ratio specified in ASTM D6866-11 of polyolefin can be regarded as almost 0 pMC, if the value of modern carbon ratio of plant-derived polyolefin is known, the content ratio of both is derived from that plant-derived The value can be calculated by comparing the value of the modern carbon ratio of the polyolefin with the value of the modern carbon ratio of the polyolefin in the synthetic resin material. For example, if the value of the modern carbon ratio of a polyolefin in a synthetic resin material containing a plant-derived polyolefin known to have a modern carbon ratio of 104 pMC is 57 pMC, the polyolefin in the synthetic resin material is a plant It can be said that it is composed of 55% by mass of polyolefin derived from 45% by mass of polyolefin derived from fossil fuel.

  The polyolefin in the synthetic resin material may be a plant-derived polyolefin 100% by mass (100% Corg.renew) (in that case, the upper limit of the modern carbon ratio is 118 pMC). The plant-derived polyolefin is preferably 60% by mass (ie 60% Corg.renew) or more (corresponding to 61.8 pMC or more), more preferably 70% by mass (ie 70% Corg.renew). It is more than that (corresponding to being 72.1 pMC or more), more preferably 80% by mass (that is, 80% Corg.renew) or more (corresponding to being 82.4 pMC or more). Desirable from the viewpoint of offset property. Therefore, the hinge cap having a membrane-like hinge containing the plant-derived polyolefin of the present invention has a synthetic resin such as a fossil fuel-derived polyolefin in a synthetic resin in a synthetic resin material of 45% by mass or less, preferably 40%. Although it can be contained in an amount of not more than mass%, more preferably not more than 30 mass%, still more preferably not more than 20 mass%, it may not contain any synthetic resin such as polyolefin derived from fossil fuel. If the synthetic resin such as polyolefin derived from fossil fuel exceeds 45% by mass, carbon negative may occur.

2. Fossil fuel-derived polyolefin The hinge cap comprising a membrane-like hinge containing the plant-derived polyolefin of the present invention includes, as described above, a fossil within the scope that does not impair the object of the present invention in addition to the plant-derived polyolefin. Fuel derived polyolefins can be included. Preferably, the following polyolefin can be used as the fossil fuel-derived polyolefin.

[Polyolefin derived from fossil fuel]
The fossil fuel-derived polyolefin preferably used as a fossil fuel-derived synthetic resin that can be contained in a hinge cap having a membrane hinge, which contains the plant-derived polyolefin of the present invention, is fossil fuel-derived ethylene, propylene These are homopolymers or copolymers of olefinic monomers of alkenes derived from fossil fuels such as butene and pentene. Preferably, it is an ethylene-based resin derived from fossil fuel or a propylene-based resin derived from fossil fuel, and when importance is attached to repeated fatigue resistance, a propylene-based resin derived from fossil fuel can be used.

[Ethylene resin derived from fossil fuel]
The fossil fuel-derived ethylene-based resin is a fossil fuel-derived ethylene homopolymer or a fossil fuel-derived ethylene copolymer mainly composed of fossil fuel-derived ethylene, and the copolymer is a fossil fuel. It is a copolymer of ethylene derived from other olefins derived from other fossil fuels and / or unsaturated monomers derived from other fossil fuels. Preferred fossil fuel-derived ethylene resins include low-density polyethylene derived from fossil fuel, high-density polyethylene derived from fossil fuel, and metallocene-catalyzed ethylene polyolefin derived from fossil fuel.

As the high density polyethylene derived from fossil fuel, those having the same density, MFR, etc. as those of plant-derived high density polyethylene can be used, and generally derived from fossil fuel having a density of 0.942 g / cm ³ or more. Polyethylene. A synthetic product can be used as the high-density polyethylene derived from fossil fuel, but it can also be selected from commercially available products. As a commercially available product, a low-pressure method derived from a fossil fuel obtained using a so-called Ziegler-Natta catalyst (hereinafter sometimes referred to as “Ziegler catalyst”), which is well known as a catalyst for stereoregular polymerization of α-olefins. Examples of such high-density polyethylene include Novatec HD (registered trademark) manufactured by Nippon Polyethylene Co., Ltd., Hi-Zex (registered trademark) manufactured by Prime Polymer Co., Ltd., and High-density polyethylene manufactured by Brasschem (brand name IE59U3).

  As the low-density polyethylene derived from fossil fuel, those having the same density, MFR, etc. as the low-density polyethylene derived from plants can be used. As low-density polyethylene derived from fossil fuel, in addition to so-called high-pressure polyethylene derived from fossil fuel (soft polyethylene) obtained using a Ziegler-Natta catalyst, linear low-density polyethylene derived from fossil fuel (LLDPE), etc. Copolymers of ethylene derived from fossil fuels and olefins derived from other fossil fuels can also be used. As the low density polyethylene derived from fossil fuel, a synthetic product can be used, but a commercially available product may be used. Commercially available products include Novatec LD (registered trademark) manufactured by Nippon Polyethylene Co., Ltd., and low density polyethylene derived from fossil fuel manufactured by Mitsui DuPont Polychemical Co., Ltd.

  The fossil fuel-derived metallocene catalyst ethylene-based polyolefin means fossil fuel-derived ethylene-based resin obtained using a metallocene catalyst, and the main component is fossil fuel-derived ethylene or fossil fuel-derived ethylene. It is an ethylene-based resin obtained by polymerizing a mixed monomer having a derived α-olefin as a subcomponent in the presence of a metallocene catalyst. Therefore, the fossil fuel-derived metallocene-catalyzed ethylene-based polyolefin contains a fossil fuel-derived polyethylene or a fossil fuel-derived ethylene / α-olefin copolymer obtained by conducting a polymerization reaction in the presence of a metallocene catalyst. As the α-olefin derived from fossil fuel, those having 3 to 10 carbon atoms are preferable, and propylene, butene-1, pentene-1, hexene-1, 4-methylpentene-1, and heptene derived from fossil fuel. -1, octene-1, and the like. These fossil fuel-derived α-olefins are preferably present in the copolymer in an amount of 3 to 15 mol%.

Fossil fuel-derived metallocene-catalyzed ethylene-based polyolefins are characterized by a narrow molecular weight distribution. In the present invention, polydispersity (measured according to Mw / Mn, JIS K6922-2), which is an index of molecular weight distribution. Usually, 1.2 to 6, preferably 1.5 to 4 are used. For the purpose of improving moldability, those having relatively long chain branches introduced during polymerization or in subsequent steps are also preferably used. The metallocene-catalyzed ethylene-based polyolefin derived from fossil fuel usually has a density of about 0.890 to 0.920 g / cm ³ , preferably about 0.892 to 0.918 g / cm ³ , and MFR (temperature 190 ° C., A load having a load of 21.18 N is usually 1 to 100 g / 10 minutes, preferably 5 to 80 g / 10 minutes, more preferably about 10 to 50 g / 10 minutes. As the metallocene-catalyzed ethylene-based polyolefin derived from fossil fuel, a synthetic product can be used, but it can also be selected from commercially available products. Examples of commercially available products include Exelen (registered trademark) manufactured by Sumitomo Chemical Co., Ltd. and Harmolex (registered trademark) manufactured by Nippon Polyethylene Co., Ltd.

[Propylene-based resin derived from fossil fuel]
The propylene-based resin derived from fossil fuel is a homopolymer of propylene derived from fossil fuel or a propylene copolymer derived from fossil fuel whose main component is propylene derived from fossil fuel, and the copolymer is a fossil fuel. It is a copolymer of propylene derived from other fossil fuels such as ethylene derived from fossil fuels (α-olefins) and / or unsaturated monomers derived from other fossil fuels. Preferred propylene-based resins derived from fossil fuel include Ziegler-catalyzed propylene homopolymer derived from fossil fuel or Ziegler-catalyzed propylene random copolymer derived from fossil fuel, metallocene-catalyzed propylene homopolymer derived from fossil fuel, or metallocene derived from fossil fuel. There are catalytic propylene random copolymers, metallocene catalyst propylene block copolymers derived from fossil fuels, and the like.

  A Ziegler-catalyzed propylene homopolymer derived from fossil fuel or a Ziegler-catalyzed propylene random copolymer derived from fossil fuel is a propylene homopolymer derived from fossil fuel or fossil fuel obtained using a Ziegler-Natta catalyst. It is a propylene random copolymer derived from it. The content of propylene monomer units derived from fossil fuel in the Ziegler-catalyzed propylene random copolymer derived from fossil fuel is 100 to 94% by mass (excluding 100% by mass), preferably 99.7. ~ 95 mass%, more preferably 99.5-95.5 mass%, and the content of α-olefin monomer units derived from fossil fuel is 0-6 mass% (excluding 0 mass%), preferably It is a random copolymer derived from fossil fuel in a proportion of 0.3 to 5% by mass, more preferably 0.5 to 4.5% by mass. Examples of the fossil fuel-derived α-olefin copolymerized with the fossil fuel-derived propylene include ethylene derived from fossil fuel and / or α-olefin having 4 to 20 carbon atoms derived from fossil fuel. Specifically, And fossil fuel-derived ethylene, butene-1, pentene-1, hexene-1, octene-1, 4-methylpentene-1, and the like. Two or more kinds of the fossil fuel-derived α-olefin can be used in combination.

The density of the Ziegler-catalyzed propylene homopolymer derived from fossil fuel or the Ziegler-catalyzed propylene random copolymer derived from fossil fuel is usually 0.880 to 0.930 g / cm ³ , preferably 0.885 to 0.925 g. / Cm ³ , and MFR (measured at a temperature of 190 ° C. and a load of 21.18 N) is usually 1 to 100 g / 10 minutes, preferably 5 to 80 g / 10 minutes, more preferably about 10 to 50 g / 10 minutes. Can be used. The polydispersity (Mw / Mn) is usually in the range of 1.2 to 6, preferably 1.5 to 4, and is effective in terms of improving moldability. As the Ziegler-catalyzed propylene homopolymer derived from fossil fuel or the Ziegler-catalyzed propylene random copolymer derived from fossil fuel, a synthetic product can be used, but a commercially available product may be used. Examples of commercially available products include Novatec PP (registered trademark) manufactured by Nippon Polypro Co., Ltd., Sumitomo Nobren (registered trademark) manufactured by Sumitomo Chemical Co., Ltd., Sun Allomer (registered trademark) manufactured by Sun Allomer Co., Ltd., and Prime Polymer Co., Ltd. Prime Polypro (registered trademark).

  The metallocene-catalyzed propylene homopolymer derived from fossil fuel or the metallocene-catalyzed propylene random copolymer derived from fossil fuel is a propylene homopolymer derived from fossil fuel, or derived from fossil fuel, obtained using a metallocene catalyst. Propylene random copolymer. The metallocene-catalyzed propylene random copolymer derived from fossil fuel has a content of propylene monomer units derived from fossil fuel in the copolymer of 100 to 94% by mass (excluding 100% by mass), preferably 99.7. ~ 95 mass%, more preferably 99.5-95.5 mass%, and the content of α-olefin monomer units derived from fossil fuel is 0-6 mass% (excluding 0 mass%), preferably A random copolymer having a ratio of 0.3 to 5% by mass, more preferably 0.5 to 4.5% by mass. Examples of the fossil fuel-derived α-olefin copolymerized with the fossil fuel-derived propylene include ethylene derived from fossil fuel and / or α-olefin having 4 to 20 carbon atoms derived from fossil fuel. Specifically, And fossil fuel-derived ethylene, butene-1, pentene-1, hexene-1, octene-1, 4-methylpentene-1, and the like. Two or more kinds of the fossil fuel-derived α-olefin can be used in combination.

The metallocene-catalyzed propylene homopolymer derived from fossil fuel or the metallocene-catalyzed propylene random copolymer derived from fossil fuel usually has a density of 0.880 to 0.930 g / cm ³ , preferably 0.885 to 0.925 g. / Cm ³ and MFR (measured at a temperature of 190 ° C. and a load of 21.18 N) is usually 1 to 100 g / 10 minutes, preferably 5 to 80 g / 10 minutes, more preferably about 10 to 50 g / 10 minutes. Things can be used. Moreover, what has polydispersity (Mw / Mn) in the range of 1.2-6 normally, preferably 1.5-4 is effective at the point of a moldability improvement. As the metallocene-catalyzed propylene homopolymer derived from fossil fuel or the metallocene-catalyzed propylene random copolymer derived from fossil fuel, a synthetic product can be used, but it can also be selected from commercially available products. Examples of commercially available products include Wintec (registered trademark) manufactured by Nippon Polypro Co., Ltd.

  Fossil fuel-derived metallocene-catalyzed propylene block copolymer is a polymer comprising a block of polymer made of fossil fuel-derived polypropylene and an ethylene / propylene copolymer derived from fossil fuel, obtained using a metallocene catalyst. And a block copolymer comprising: Specifically, a polymer block made of a fossil fuel-derived polypropylene (hereinafter sometimes referred to as “PP block”) and a polymer block made of a fossil fuel-derived propylene / ethylene copolymer (hereinafter “EP”). Is a block copolymer obtained by using a metallocene catalyst, each of which is bonded to one or more blocks, and maintains the rigidity of the polypropylene while maintaining the rigidity of the propylene / ethylene copolymer. It is a block copolymer derived from a fossil fuel known per se, which exhibits a high rigidity and impact resistance with improved fatigue resistance in a well-balanced manner.

The fossil fuel-derived metallocene-catalyzed propylene-based block copolymer usually has a density of about 0.880 to 0.930 g / cm ³ , preferably about 0.885 to 0.925 g / cm ³ , and MFR (temperature 190 ° C. , Measured at a load of 21.18 N) is usually 1 to 100 g / 10 min, preferably 5 to 80 g / 10 min, more preferably about 10 to 50 g / 10 min. Moreover, what has polydispersity (Mw / Mn) in the range of 1.2-6 normally, preferably 1.5-4 is effective at the point of a moldability improvement. As the metallocene-catalyzed propylene-based block copolymer derived from fossil fuel, a synthetic product can be used, but it can also be selected from commercially available products. Examples of commercially available products include Novatec PP (registered trademark) manufactured by Nippon Polypro Co., Ltd., Sumitomo Nobren (registered trademark) manufactured by Sumitomo Chemical Co., Ltd., Sun Allomer (registered trademark) manufactured by Sun Allomer Co., Ltd., and Prime Polymer Co., Ltd. Examples include Prime Polypro (registered trademark) and Kernel (registered trademark) manufactured by Nippon Polyethylene Corporation.

  It should be noted that the hinge cap integrally formed from a synthetic resin material containing a plant-derived polyolefin contains a synthetic resin obtained using a Ziegler catalyst or a metallocene catalyst. The specimen is qualitatively analyzed using a scanning electron microscope equipped with an energy dispersive X-ray detector to detect a trace amount of catalyst element species remaining in the specimen. Confirmation of an appearance peak corresponding to the energy of a certain group IVa Ti, a group Va V which is a transition metal of the fourth period or a group VIa group Cr which is a transition metal of the fourth period (Ziegler catalyst), or It is confirmed that there is a peak corresponding to the energy of the group IVa Zr which is the transition metal of the fifth period of the periodic table or the energy of the group IVa Hf which is the transition metal of the sixth period. By (metallocene catalyst), it can be confirmed.

3. Modifying agent or moldability improving agent A hinge cap comprising a membrane-like hinge containing the plant-derived polyolefin of the present invention, in addition to the fossil fuel-derived polyolefin exemplified above, may further contain a modifier or Contains fossil fuel-derived resin components such as fossil fuel-derived ethylene / vinyl acetate copolymer, ethylene / acrylic acid copolymer, ethylene / methyl acrylate copolymer, and maleic anhydride-modified polyolefin as moldability improvers can do. The content of the resin component derived from fossil fuel contained as a modifier or moldability improver is usually 20% by mass or less, preferably 10% by mass or less, more preferably 5% by mass in the resin component in the synthetic resin material. % Or less.

4). Fatty acid amide having unsaturated cis-structured carbon double bond The hinge cap having a membrane-like hinge containing the plant-derived polyolefin of the present invention has a hinge mechanism (3) fatty acid having an unsaturated cis-structured carbon double bond. It consists of a synthetic resin material containing 100 to 4500 ppm of amide (A). That is, the hinge cap having a membrane hinge containing the plant-derived polyolefin of the present invention has at least the hinge mechanism (3), the plant-derived polyolefin alone, or the plant-derived polyolefin and the fossil fuel-derived polyolefin. A fatty acid amide having an unsaturated cis structure carbon double bond (A) in addition to a synthetic resin such as a fossil fuel-containing resin component contained as a modifier or a moldability improver. And 100 to 4500 ppm with respect to the total mass of the synthetic resin material forming the hinge mechanism (3). The cap body (1), the overcap (2), and the hinge mechanism (3) are made of a synthetic resin material containing 100 to 4500 ppm of fatty acid amide (A) having an unsaturated cis structure carbon double bond. It is preferable. The fatty acid amide (A) having an unsaturated cis-structured carbon double bond (hereinafter sometimes referred to as “unsaturated fatty acid amide of (A)”) means at least one bond of carbon diamide in the molecular structure of the fatty acid amide. An unsaturated fatty amide having a heavy bond, wherein all of the carbon double bonds are unsaturated cis-structured carbon double bonds.

  The hinge cap having a membrane hinge containing the plant-derived polyolefin of the present invention is a synthesis in which at least the hinge mechanism (3) contains 100 to 4500 ppm of fatty acid amide (A) having an unsaturated cis structure carbon double bond. The hinge formed integrally from a synthetic resin material that is made of a resin material, has good snapping properties, durability and operability, and has good transferability in cap supply in the process of attaching a cap to a container. A cap can be provided. The content of the unsaturated fatty acid amide (A) is preferably 110 to 4400 ppm, more preferably 115 to 4300 ppm, still more preferably 120 to 4200 ppm, and particularly preferably 125 to 4100 ppm. In addition, when the unsaturated fatty acid amide (A) is a mixture of fatty acid amides having two or more types of unsaturated cis structure carbon double bonds as described later, the total content of fatty acid amides is within the above range. Need to be included.

  When the content of the unsaturated fatty acid amide in (A) is in the above range, in the step of attaching the cap to the container, the transportability in supplying the cap can be improved. When the content of the unsaturated fatty acid amide in (A) is out of the above range, in the step of attaching the cap to the container, a hinge cap comprising a membrane-like hinge containing a plant-derived polyolefin in the cap supply means There is a possibility that troubles such as stopping of the filling container manufacturing apparatus may occur due to clogging or a delay in the supply of the hinge cap including the membrane hinge to the capper.

  Fatty acid amides, particularly fatty acid amides having an unsaturated bond, are conventionally known to function as lubricants for various synthetic resins, but unsaturated fatty acid amides have a carbon double bond with a trans structure. And the uniform blending of the resin material is insufficient, or the unsaturated fatty acid amide having the trans structure is a hinge mechanism (3) and, in some cases, a hinge including a cap body (1) and an overcap (2). Resin loss due to local foaming may occur or precipitate on the outer surface of the cap. As a result, the surface gloss and feel of the outer surface of the hinge cap such as the hinge mechanism (3) deteriorate, or the hinge mechanism (3) The slipperiness of the hinge cap such as (3) may deteriorate, and in the step of attaching the cap to the container, the transportability in supplying the cap may not be good.

  The unsaturated fatty acid amide of (A) is preferably an unsaturated fatty acid amide having one bond of a carbon double bond having an unsaturated cis structure in the molecular structure. In addition, the unsaturated fatty acid amide of (A) may be an unsaturated fatty acid amide having a plurality of unsaturated cis-structured carbon double bonds in the molecular structure, and an unsaturated cis-structured carbon double bond in the molecular structure. , Preferably 6 bonds or less, more preferably 5 bonds or less, and still more preferably 4 bonds or less. Therefore, the unsaturated fatty acid amide (A) may contain a compound having an unsaturated cis structure carbon double bond having 2 to 4 bonds of unsaturated cis structure carbon double bonds in the molecular structure. .

[Unsaturated fatty acid amide having one carbon double bond of unsaturated cis structure in the molecular structure]
Examples of the unsaturated fatty acid amide (A) having one bond of a carbon double bond having an unsaturated cis structure include the following formulas (A ₁ ) to (A ₃ ):
(A ₁ ) H ₂ N—CO — (— CH ₂ —) _n —CH═CH — (— CH ₂ —) _n —CH ₃ (where n is an integer in the range of 6 ≦ n ≦ 10);
(A ₂ ) H ₂ N—CO — (— CH ₂ —) _m−2 —CH═CH — (— CH ₂ —) _m —CH ₃ (where m is an integer in the range of 6 ≦ m ≦ 10) And (A ₃ ) H ₂ N—CO — (— CH ₂ —) _{k + 4} —CH═CH — (— CH ₂ —) _k —CH ₃ (where k is an integer in the range of 6 ≦ k ≦ 10); ;
And at least one fatty acid amide compound represented by one formula selected from the group consisting of: (Hereinafter, (the fatty acid amide of the formula of _{A 1),} there may be referred to as "Formula _{(A 1} fatty acid amides)", further may be simply referred to as "Formula _{(A 1)". (A} 2) The same applies to the fatty acid amide represented by the formula (A ₃ ).)

Examples of the unsaturated fatty acid amide (A) having one carbon double bond having an unsaturated cis structure include compounds represented by the following formulas (A ₁ ) to (A ₃ ).

Formula (A ₁ ): H ₂ N—CO — (— CH ₂ —) _n —CH═CH — (— CH ₂ —) _n —CH ₃ (where n is an integer in the range of 6 ≦ n ≦ 10)
cis-8,9-hexadecenoamide [H ₂ N—CO — (— CH ₂ —) ₆ —CH═CH — (— CH ₂ —) ₆ —CH ₃ ] (corresponding to n = 6)
cis-9,10-octadecenoamide [H ₂ N—CO — (— CH ₂ —) ₇ —CH═CH — (— CH ₂ —) ₇ —CH ₃ ] (corresponding to n = 7)
cis-10, 11-eicosenoamide [H ₂ N—CO — (— CH ₂ —) ₈ —CH═CH — (— CH ₂ —) ₈ —CH ₃ ] (corresponding to n = 8)
cis-11,12-ethaeicosenoamide [H ₂ N—CO — (— CH ₂ —) ₉ —CH═CH — (— CH ₂ —) ₉ —CH ₃ ] (corresponding to n = 9)
cis-12, 13- tetraeicosenoamide (corresponding to n = 10) _{[H 2 N-CO - (-} CH 2 -) 10 -CH = CH - (- - CH 2) 10 -CH 3 ]

Formula (A ₂ ): H ₂ N—CO — (— CH ₂ —) _{m− 2} —CH═CH — (— CH ₂ —) _m —CH ₃ (where m is in the range of 6 ≦ m ≦ 10) integer)
cis-6,7-tetradecenoamide _{[H 2 N-CO - (-} CH 2 -) 4 -CH = CH - (- CH 2 -) 6 -CH 3 ] (corresponding to m = 6)
cis-7,8-hexadecenoamide [H ₂ N—CO — (— CH ₂ —) ₅ —CH═CH — (— CH ₂ —) ₇ —CH ₃ ] (corresponding to m = 7)
cis-8,9-octadecenoamide [H ₂ N—CO — (— CH ₂ —) ₆ —CH═CH — (— CH ₂ —) ₈ —CH ₃ ] (corresponding to m = 8)
cis-9,10-eicosenoamide [H ₂ N—CO — (— CH ₂ —) ₇ —CH═CH — (— CH ₂ —) ₉ —CH ₃ ] (corresponding to m = 9)
cis-10, 11- ethaeicosenoamide (corresponding to m = 10) _{[H 2 N-CO - (-} CH 2 -) 8 -CH = CH - (- - CH 2) 10 -CH 3 ]

Formula (A ₃ ): H ₂ N—CO — (— CH ₂ —) _{k + 4} —CH═CH — (— CH ₂ —) _k —CH ₃ (where k is an integer in the range of 6 ≦ k ≦ 10)
cis-12,13-eicosenoamide [H ₂ N—CO — (— CH ₂ —) ₁₀ —CH═CH — (— CH ₂ —) ₆ —CH ₃ ] (corresponding to k = 6)
cis-13,14-docosenoamide [H ₂ N—CO — (— CH ₂ —) ₁₁ —CH═CH — (— CH ₂ —) ₇ —CH ₃ ] (corresponding to k = 7)
cis-14,15- tetracosenoamide (corresponding to k = 8) _{[H 2 N-CO - (-} CH 2 -) 12 -CH = CH - 8 -CH 3 (- - CH 2) ]
cis-15,16-hexacosenoamide [H ₂ N—CO — (— CH ₂ —) ₁₃ —CH═CH — (— CH ₂ —) ₉ —CH ₃ ] (corresponding to k = 9)
cis-16,17- octacosenoamide (corresponding to k = 10) _{[H 2 N-CO - (-} CH 2 -) 14 -CH = CH - (- - CH 2) 10 -CH 3 ]

[Unsaturated fatty acid amide having 2 to 4 carbon double bonds of unsaturated cis structure in the molecular structure]
The unsaturated fatty acid amide of (A), which is a compound having 2 to 4 bonds of unsaturated cis structure carbon double bonds in the molecular structure, includes, for example, an unsaturated cis structure carbon double bond in the molecular structure. The following compounds having 4 bonds are exemplified.

cis-5,6-8,9-11,12-14,15-arachidonic acid amide [H ₂ N—CO — (— CH ₂ —) ₃ —CH═CH—CH ₂ —CH═CH—CH ₂ — _{CH = CH-CH 2 -CH =} CH - (- CH 2 -) 4 -CH 3 ]

  The unsaturated fatty acid amide of (A), which is a compound having 2 to 4 carbon double bonds of unsaturated cis structure in the molecular structure, can be used alone or with other unsaturated fatty acid amides of (A) It can also be used as a mixture.

[Mixture of (A) unsaturated fatty acid amide]
As the unsaturated fatty acid amide of (A), a fatty acid amide of the above formulas (A ₁ ) to (A ₃ ), or a carbon double bond of an unsaturated cis structure of 2 to 4 bonds in the molecular structure. The use of one type of unsaturated fatty acid amide selected from fatty acid amides can provide the desired effect, but even if a mixture of two or more types of unsaturated fatty acid amides (A) is used. Good. The mixture of unsaturated fatty acid amides (A) preferably contains the fatty acid amide of the above formula (A ₁ ).

Accordingly, a preferred mixture of unsaturated fatty acid amides of (A) includes the fatty acid amide of the above formula (A ₁ ) and at least one fatty acid amide represented by the above formula of (A ₂ ) or (A ₃ ) And a mixture. The proportion of the fatty acid amide of the formula (A ₁ ) in the mixture is 0.05 to 99.95% by mass, preferably 0.1 to 99.9% by mass, more preferably 0.15 to 99.85% by mass. It is. Therefore, the ratio of the fatty acid amide of the formula (A ₂ ) or the fatty acid amide of the formula (A ₃ ) is 99.95 to 0.05% by mass, preferably 99.9 to 0.1% by mass, Preferably it is 99.85-0.15 mass%.

In particular, the mixture of unsaturated fatty acid amides of (A) is a fatty acid amide of formula (A ₁ ), ie H ₂ N—CO — (— CH ₂ —) _n —CH═CH — (— CH ₂ — ) _N —CH ₃ (where n is an integer in the range of 6 ≦ n ≦ 10) and the fatty acid amide of the above formula (A ₂ ), that is, H ₂ N—CO — (— CH ₂ —) _{m— 2} -CH═CH — (— CH ₂ —) _m —CH ₃ (where m is an integer in the range of 6 ≦ m ≦ 10), and m = n + 1 or m = n−1 And a mixture thereof.

Specifically, the formula (A ₁ ) is cis-9,10-octadecenoamide [H ₂ N—CO — (— CH ₂ —) ₇ —CH═CH — (— CH ₂ —) ₇ —CH ₃ ] ( n = 7), and
Formula _{(A 2)} is, cis-6,7-tetradecenoamide _{[H 2 N-CO - (-} CH 2 -) 4 -CH = CH - (- CH 2 -) 6 -CH 3 ] (m = 6 = n -1) or cis-8,9-octadecenoamide [H ₂ N—CO — (— CH ₂ —) ₆ —CH═CH — (— CH ₂ —) ₈ —CH ₃ ] (m = 8 = (equivalent to n + 1) can be preferably used, and cis-10, 11-ethaeicosenoamide [H ₂ N—CO — (— CH ₂ —) ₈ —CH═CH — (— CH ₂ —) ₁₀ Mixtures of combinations with —CH ₃ ] (m = 10) can also be used.

In addition, the mixture of unsaturated fatty acid amides of (A) is a fatty acid amide of the above formula (A ₁ ), that is, H ₂ N—CO — (— CH ₂ —) _n —CH═CH — (— CH ₂ — ) _N- CH ₃ (where n is an integer in the range of 6 ≦ n ≦ 10) and the fatty acid amide of the above formula (A ₃ ), that is, H ₂ N—CO — (— CH ₂ —) _{k + 4} − CH = CH — (— CH ₂ —) _k —CH ₃ (where k is an integer in the range of 6 ≦ k ≦ 10), and is preferably a mixture with the fatty acid amide in which k = n. .

Specifically, the formula (A ₁ ) is cis-9,10-octadecenoamide [H ₂ N—CO — (— CH ₂ —) ₇ —CH═CH — (— CH ₂ —) ₇ —CH ₃ ] ( n = 7), and the formula (A ₃ ) is cis-13,14-docosenoamide [H ₂ N—CO — (— CH ₂ —) ₁₁ —CH═CH — (— CH ₂ —) ₇ — CH ₃ ] (corresponding to k = 7 = n) is preferably used.

Furthermore, as the mixture of unsaturated fatty acid amides of (A), a mixture of two or more compounds belonging to the fatty acid amides of formula (A ₁ ) and having different values of n can be used. That is, (A ₁ ) H ₂ N—CO — (— CH ₂ —) _n —CH═CH — (— CH ₂ —) _n —CH ₃ (where n is an integer in the range of 6 ≦ n ≦ 10) And (A ₁₁ ) H ₂ N—CO — (— CH ₂ —) _j —CH═CH — (— CH ₂ —) _j —CH ₃ (where j is an integer in the range of 6 ≦ j ≦ 10) , J ≠ n)).

Specifically, for example, as formula (A ₁ ), cis-9,10-octadecenoamide [H ₂ N—CO — (— CH ₂ —) ₇ —CH═CH — (— CH ₂ —) ₇ —CH ₃ ] (Corresponding to n = 7) and formula (A ₁₁ ), cis-8,9-hexadecenoamide [H ₂ N—CO — (— CH ₂ —) ₆ —CH═CH — (— CH ₂ —) ₆ A mixture with —CH ₃ ] (corresponding to j = 6) can be preferably used.

Furthermore, the unsaturated fatty acid amide of (A) which is a compound having 2 to 4 carbon double bonds of unsaturated cis structure in the molecular structure is mixed with other unsaturated fatty acid amides of (A). It can also be used. As the other unsaturated fatty acid amides (A), the fatty acid amides of the above formulas (A ₁ ) to (A ₃ ) are preferably used, and the fatty acid amides of the formula (A ₁ ) are particularly preferable. Specifically, cis-5,6-8,9-11,12-14,15-arachidonic acid amide [H ₂ N—CO — (— CH ₂ —) ₃ —CH═CH—CH ₂ —CH═ _{CH-CH 2 -CH = CH-} CH 2 -CH = CH - (- CH 2 -) and 4 -CH _3], a mixture of cis-9,10-octadecenoamide represented by the formula _{(a 1)} and It can be preferably used.

[Method for producing unsaturated fatty acid amide (A)]
In the hinge cap having a membrane hinge containing the plant-derived polyolefin of the present invention, at least the unsaturated fatty acid amide of (A) contained in the hinge mechanism (3) may be a commercially available product, When a commercially available product is a mixture or contains impurities, the desired unsaturated fatty acid amide may be separated and obtained by an operation such as extraction. Also, for example, the fatty acid amide of the above formula (A ₂ ), that is, (A ₂ ) H ₂ N—CO — (— CH ₂ —) _m−2 —CH═CH — (— CH ₂ —) _m —CH ₃ (where m is an integer in the range of 6 ≦ m ≦ 10) can be produced by the following method, and may be obtained as a synthetic product.

The following (formula a) having a CH ₃ O—CO— terminal group and a hydroxyl group terminal or a carboxylic acid terminal at the α, ω positions and a (m−1) -linked methylene group (—CH ₂ —) _m−1 ) As a starting material. ((Formula a) illustrates a compound having a hydroxyl terminal.)
(Formula _{a) CH 3 O-CO -} (- CH 2 -) m-1 -OH

The hydroxyl terminal of the compound represented by the formula (a) is bromine-substituted using carbon tetrabromide (CBr ₄ ), and then methyl cyanide (CH ₃ ) using triphenylphosphine (PPh ₃ , triphenylphosphine). CN) Bromine is reacted with PPh ₃ in a solvent to give an ionic intermediate of formula (b).
(Formula b) [CH ₃ O—CO — (— CH ₂ —) _m−1 -PPh ₃ ] ⁺ + Br ⁻

The ionic intermediate (formula b) is reacted with decyl aldehyde, and the PPh ₃ group is terminated with an alkyl group having an unsaturated cis-structured carbon double bond. , ω structure compound.
(Formula _{c) CH 3 O-CO -} (- CH 2 -) m-2 -CH = CH - (- CH 2 -) m -CH 3

Next, lithium hydroxide is reacted with the CH ₃ O—CO— terminal group of the α, ω structure compound of the formula (c) to form a hydroxyl terminal, which is saturated with ammonium in a solvent of oxalyl chrolide and methylene chloride. The fatty acid amide having an unsaturated cis structure carbon double bond represented by the following (formula d), that is, a fatty acid amide of (A ₂ ) is synthesized.
(Wherein _{d) H 2 N-CO -} (- CH 2 -) m-2 -CH = CH - (- CH 2 -) m -CH 3
By changing m (where m is an integer in the range of 6 ≦ m ≦ 10), a fatty acid amide having an unsaturated cis structure carbon double bond having a desired carbon number is obtained using this synthetic route. Can do.

In the synthesis of fatty acid amide having an unsaturated carbon double bond, as is well known, a compound having an unsaturated cis structure carbon double bond and a compound having an unsaturated trans structure carbon double bond are simultaneously prepared. As a result, chromatographic development is performed using a mixed solvent having a concentration gradient of 100% by mass (initial development) to 40% by mass of ethyl acetate and hexane, and isomerism of unsaturated cis structure and unsaturated trans structure is achieved. Separate the body. At that time, using a proton ¹ H-NMR nuclear magnetic resonance apparatus, identification according to the chemical shift value is performed based on a standard substance made by Aldorich for the fraction solution at each chromatography development time. Identify the fluid. The fraction solution is dried under reduced pressure to recover the desired fatty acid amide having an unsaturated cis structure carbon double bond.

3. Other compounding agents In the cap main body (1), the overcap (2), and the hinge mechanism (3) of the hinge cap having a membrane-like hinge containing the plant-derived polyolefin of the present invention, at least the hinge mechanism (3 ), It is essential that the unsaturated fatty acid amide of (A) is contained in an amount of 100 to 4500 ppm, and, if necessary, as other compounding agents, reinforcing materials, fillers, antioxidants, photodegradation prevention An additive such as an agent, an antistatic agent, an ultraviolet absorber, or a nucleating agent can be blended. As the reinforcing material or filler, talc, calcium carbonate, titanium oxide, carbon black, mica and the like can be used. What is necessary is just to select the quantity of the optimal range according to the objective of an additive in the range of 0.01-100 mass parts normally with respect to 100 mass parts of synthetic resins. For example, the reinforcing material or filler can be blended in an amount of usually 10 to 100 parts by mass, preferably 15 to 80 parts by mass, and more preferably 20 to 60 parts by mass. Depending on the type of the additive, it may be usually 0.01 to 10 parts by mass, preferably 0.05 to 5 parts by mass, more preferably 0.1 to 2 parts by mass.

  In particular, as other compounding agents, other compounds known as lubricants can be used. The lubricant is preferably a saturated fatty acid amide, and in the hinge cap having a membrane hinge containing the plant-derived polyolefin of the present invention, at least the hinge mechanism (3) is a predetermined amount of the unsaturated fatty acid amide (A). In addition, the inclusion of the saturated fatty acid amide produces an effect of further improving the transportability in cap supply in the step of attaching the cap to the container. As the saturated fatty acid amide, a compound usually used as a lubricant can be used, for example, butyramide, valeric acid amide, caproic acid amide, caprylic acid amide, capric acid amide, lauric acid amide, myristic acid amide, Examples include palmitic acid amide, stearic acid amide, arachidic acid amide, and behenic acid amide, and stearic acid amide and behenic acid amide are preferable. The content in the case of containing a saturated fatty acid amide is preferably 10% by mass or less, more preferably 8% by mass or less, and still more preferably, with respect to the total amount of the unsaturated fatty acid amide (A) and the saturated fatty acid amide. The lower limit of the content is about 0.5% by mass, and if it is 1% by mass, a sufficient effect can be realized.

III. Evaluation of Hinge Cap with Membrane Hinge Containing Plant-Derived Polyolefin A hinge cap with a membrane hinge containing a plant-derived polyolefin of the present invention has good snapping, durability and operability, and In the step of attaching the cap to the container, the hinge cap is provided with a hinge mechanism of a membrane hinge, which is integrally formed from a synthetic resin material and has good transferability in cap supply.

[Evaluation of transportability in cap supply (chute clogging evaluation)]
As shown schematically in FIG. 6, for example, the hinge cap having a membrane hinge containing the plant-derived polyolefin of the present invention has good cap supply transportability in the step of attaching the cap to the container. In addition, it can be evaluated by the following method. That is, 10,000 hinge caps (c) that have been previously closed are put into a hopper (not shown), and the square shape of a square of 40 mm in length and 40 mm in width and 500 mm in length is formed from the hopper. The hinge cap (c) in the closed state is continuously put into the conduit (chute) at a supply rate of 2 pieces / second and transferred to the capper device using the delivery device (D). In this series of transfer steps, the number of times (out of 10,000) that the chute is clogged with the chute is counted. The measurement is performed three times, and the average value is used as the number of times of shoot clogging, and shoot clogging is evaluated according to the following criteria. If the chute clogging evaluation is “◯”, it can be said that the cap supply transportability is good in the process of attaching the cap to the container.
<Shoot clogging evaluation>
Choke clogging evaluation ○: Shoot clogging times 0-2 times Chute clogging evaluation ×: Shoot clogging times 3 times or more

[Evaluation of snap properties]
The snap property of the hinge cap provided with the membrane hinge containing the plant-derived polyolefin of the present invention can be determined by the following click feeling evaluation. That is, a test in which the hinge mechanism (3) of the integrally formed hinge cap is swung from the closed state to the open state and then swung from the open state to the closed state is repeated 50 times. A test subject (age 18-60) performs a sensibility evaluation as to whether or not a pleasant click feeling is felt. A majority of subjects determine that the click feeling is good for the hinge cap provided with the membrane hinge evaluated that the pleasant click feeling is sustained.

IV. Method for producing hinge cap integrally molded from synthetic resin material The method for producing a hinge cap having a membrane hinge containing the plant-derived polyolefin of the present invention is not particularly limited. For example, a plant-derived polyolefin alone, Or synthetic resins such as polyolefins derived from plants and polyolefins derived from fossil fuels, and fatty acid amides (A) having unsaturated cis structure carbon double bonds, and if necessary, synthetic resin materials containing other materials Using a cavity-shaped mold corresponding to a hinge cap provided with a cap body (1), an overcap (2), and a hinge mechanism (3), injection molding, compression molding, cast molding, vacuum molding, It can be produced by pressure forming, powder forming or other resin forming methods.

  The hinge cap having a membrane hinge containing the plant-derived polyolefin of the present invention has a so-called hinge mechanism of a membrane hinge, that is, a membrane hinge (3), and the membrane hinge (3) has an end. The position where the thickness of the film hinge is greater than the thickness of the central part and the thickness of the film hinge (3) is minimum exists between the center and the end of the film hinge (3), The membranous hinge (3) which is a hinge mechanism is characterized by comprising a synthetic resin material containing 100 to 4500 ppm of fatty acid amide (A) having an unsaturated cis structure carbon double bond. Therefore, in manufacturing a hinge cap having a membrane hinge containing the plant-derived polyolefin of the present invention, a cavity-shaped mold corresponding to the membrane hinge (3) is used, and unsaturated cis It is required to reliably supply a synthetic resin containing 100 to 4500 ppm of fatty acid amide (A) having a structural carbon double bond to a cavity-shaped mold corresponding to the membrane hinge (3).

  In order to manufacture a hinge cap having a membrane-like hinge containing the plant-derived polyolefin of the present invention from the viewpoints of shape accuracy, ease of molding, etc., the cap body having an open state of about 180 degrees (1) Cap body (1), overcap (2), and hinge mechanism using cavity-shaped mold corresponding to hinge cap provided with overcap (2) and hinge mechanism (3) (3) is preferably molded integrally. In particular, it is preferable to integrally mold a hinge cap including a membrane-like hinge containing a plant-derived polyolefin by injection molding.

  Furthermore, after the hinge cap integrally molded from the synthetic resin material containing the plant-derived polyolefin by the molding method described above is taken out from the mold, the hinge mechanism (3) is usually swung to produce the plant-derived The hinge cap comprising a membrane hinge comprising a polyolefin hinge is closed, and heat-fixed in the closed state, the shape and dimensions of the hinge cap comprising the membrane hinge are adjusted and stable, In the process of attaching the cap to the container, the transportability and snapping performance in supplying the cap are further improved. In the heat setting, heat treatment is performed at a temperature of 30 to 80 ° C., preferably 35 to 75 ° C., more preferably 40 to 70 ° C. by a method known per se such as storage in a constant temperature room or hot air blowing. The time for performing the heat setting can be appropriately selected according to the temperature of the heat treatment and other conditions, but is usually 0.5 hours to 3 months, preferably 5 hours to 1 month, more preferably 1 day to 2 weeks. do it.

  EXAMPLES The present invention will be further described below with reference to examples and comparative examples, but the present invention is not limited to the examples. The measuring method of the characteristic or physical property of a hinge cap provided with the synthetic resin raw material and the membrane hinge in Examples and Comparative Examples is as follows.

[Density and MFR]
The density and MFR of the polyolefin were measured according to JIS K6922-2.

[Modern carbon ratio]
The modern carbon ratio of polyolefin was commissioned to Beta Analytic Co., Ltd. (Geoscience Research Institute, a general agency in Japan), and measured in accordance with ASTM D6866-11.

[Shoot clogging evaluation]
It was evaluated by the following method that the hinge cap provided with the membrane hinge had good cap supply transportability in the step of attaching the cap to the container. That is, a hinge cap (c) having 10,000 membrane-like hinges that have been previously closed is put into the hopper, and has a square cross section of 40 mm in length and 40 mm in width and 500 mm in length. A hinge cap (c) having a closed membrane hinge is put into a columnar conduit (chute) continuously at a supply speed of 2 pieces / second, and transferred to a capper device using a delivery device (D). . In this series of transfer steps, the number of times of chute clogging in the chute (out of 10,000) was counted. Measurement was performed three times, and the average value was taken as the number of times of shoot clogging, and shoot clogging was evaluated according to the following criteria.
<Shoot clogging evaluation>
Choke clogging evaluation ○: Shoot clogging times 0-2 times Chute clogging evaluation ×: Shoot clogging times 3 times or more

[Click feeling evaluation]
The test of repeating the operation of swinging the hinge mechanism (3) of the integrally formed hinge cap from the closed state to the open state and then swinging from the open state to the closed state was repeated 50 times. The subjects (aged 18 to 60 years old) performed a sensibility evaluation as to whether or not a pleasant click feeling would be felt, and the majority of the subjects evaluated the click on the hinge cap provided with the membrane hinge evaluated that the pleasant click feeling persisted. Was determined to be good.

Plant-derived high-density polyethylene [manufactured by Brasschem, brand name SGF4950, density 0.956 g / cm ³ , MFR (temperature 190 ° C., load 21.18 N) 28 g / 10 min, modern carbon ratio 104 pMC. Hereinafter, it may be referred to as “plant-derived polyethylene”. The polyolefin is 100% Corg.renew. ] Cis-9,10-octadecenoamide [H ₂ N—CO — (— CH ₂ —) ₇ —CH═CH — (— CH) as a fatty acid amide (A) having an unsaturated cis structure carbon double bond _2- ) _7- CH ₃ ; unsaturated fatty acid amide of formula (A ₁ )] (98.0% by mass) and cis-13,14-docosenoamide [H ₂ N—CO — (— CH ₂ —) ₁₁ A mixture of —CH═CH — (— CH ₂ —) ₇ —CH ₃ ; unsaturated fatty acid amide of formula (A ₃ )] (2.0% by mass) is 3500 ppm with respect to plant-derived high-density polyethylene. The resin composition containing the unsaturated fatty acid amide (A) was obtained.

  The obtained resin composition containing the unsaturated fatty acid amide of (A) was supplied to an injection molding machine, and the cap main body (1), the overcap (2), and the membrane in a 180 ° open state were opened. Using a cavity-shaped mold corresponding to a hinge cap provided with a hinge mechanism (3) of a cylindrical hinge, a hinge cap provided with a membrane hinge containing a plant-derived polyolefin was integrally formed by injection molding.

The shape and size of the cap body (1), the overcap (2), and the membrane hinge (3) of the hinge cap provided with the membrane hinge (3) were as follows.
1) Cap body (1): A substantially cylindrical shape having an outer diameter of 37 mm, an inner diameter of 32 mm, and a height of 27 mm. Outlet diameter 10mm
2) Overcap (2): substantially cylindrical shape with an outer diameter of 37 mm, an inner diameter of 33 mm, and a height of 9 mm 3) Membrane hinge (3)
Hinge body (3a): cross section of drum with length (oscillation axis direction) 10 mm and maximum width (orthogonal direction of oscillation axis) 4 mm, center thickness 0.2 mm, end thickness 0.3 mm
Edge / center thickness ratio: 1.50
Minimum part / central part thickness ratio: 0.730
Minimum thickness distance ratio: 0.45
Thick part (3b): A rectangular cross section with a width of 1.5 mm and a length of 5 mm at the central part (cap body (1) side and overcap (2) side) of the coupling part of the membrane hinge (3), thickness 1 mm

  A film containing a plant-derived polyolefin containing a plant-derived polyolefin molded by injection molding and having a hinge cap provided with a membrane-like hinge removed from the mold and then swinging the hinge mechanism (3). The hinge cap provided with a cylindrical hinge was closed and heat-set at a temperature of 40 ° C. for 1 week.

[Click feeling evaluation and chute clogging evaluation]
For a hinge cap having a membrane-like hinge containing a plant-derived polyolefin after heat setting, the hinge mechanism (3) is swung from the closed state to the open state, and then from the open state to the closed state. When the swinging operation was repeated 50 times, it was determined that a pleasant click feeling persisted and the click feeling was good. In addition, Table 1 shows the results of performing chute clogging evaluation on the hinge cap provided with this membrane hinge.

[Example 2]
Except for a change in the composition of the fatty acid amide (A) having an unsaturated cis-structured carbon double bond to 130 ppm with respect to the plant-derived polyethylene, in the same manner as in Example 1, by injection molding, A hinge cap comprising a membrane hinge containing the derived polyolefin was integrally molded.

  A film containing a plant-derived polyolefin containing a plant-derived polyolefin molded by injection molding and having a hinge cap provided with a membrane-like hinge removed from the mold and then swinging the hinge mechanism (3). When the hinge cap provided with a cylindrical hinge was closed and heat-fixed by heat treatment at a temperature of 40 ° C. for 1 week, no distortion of the shape was observed.

[Click feeling evaluation and chute clogging evaluation]
For a hinge cap having a membrane-like hinge containing a plant-derived polyolefin after heat setting, the hinge mechanism (3) is swung from the closed state to the open state, and then from the open state to the closed state. When the swinging operation was repeated 50 times, it was determined that a pleasant click feeling persisted and the click feeling was good. In addition, Table 1 shows the results of performing chute clogging evaluation on the hinge cap provided with this membrane hinge.

[Example 3]
Fatty acid amide (A) having an unsaturated cis structure carbon double bond is converted into cis-13,14-docosenoamide [unsaturated fatty acid amide of formula (A ₃ )] (98.0% by mass), and cis-9, 10-octadecenoamide [Unsaturated fatty acid amide of formula (A ₁ )] (2.0% by mass) In the same manner as in No. 1, a hinge cap having a membrane hinge containing a plant-derived polyolefin was integrally formed by injection molding.

  A film containing a plant-derived polyolefin containing a plant-derived polyolefin molded by injection molding and having a hinge cap provided with a membrane-like hinge removed from the mold and then swinging the hinge mechanism (3). When the hinge cap provided with a cylindrical hinge was closed and heat-fixed by heat treatment at a temperature of 40 ° C. for 1 week, no distortion of the shape was observed.

[Click feeling evaluation and chute clogging evaluation]
For a hinge cap having a membrane-like hinge containing a plant-derived polyolefin after heat setting, the hinge mechanism (3) is swung from the closed state to the open state, and then from the open state to the closed state. When the swinging operation was repeated 50 times, it was determined that a pleasant click feeling persisted and the click feeling was good. In addition, Table 1 shows the results of performing chute clogging evaluation on the hinge cap provided with this membrane hinge.

[Example 4]
In place of the single use of the plant-derived polyethylene, 90% by mass of the plant-derived polyethylene and high-density polyethylene derived from fossil fuel (Blaschem, brand name IE59U3, density 0.959 g / cm ³ , MFR (temperature 190) C, load 2.12 N) 5 g / 10 min, modern carbon ratio 0 pMC. Hereinafter, it may be referred to as “fossil fuel-derived polyethylene”. ] Change in composition to 10 mass% (synthetic resin material is 90% Corg.renew, modern carbon ratio is 93 pMC), and minimum thickness / central thickness ratio in membrane hinge (3) A hinge cap including a membrane-like hinge containing a plant-derived polyolefin was integrally formed by injection molding in the same manner as in Example 1 except that the shape of the hinge cap was changed to 0.760.

  After the hinge cap having a membrane hinge formed by injection molding is taken out of the mold, the hinge mechanism (3) is swung to close the hinge cap having a membrane hinge containing a plant-derived polyolefin. When heat-fixed by heat treatment for 1 week at a temperature of 40 ° C. as a lid state, no distortion of the shape was observed.

[Click feeling evaluation and chute clogging evaluation]
For a hinge cap having a membrane-like hinge containing a plant-derived polyolefin after heat setting, the hinge mechanism (3) is swung from the closed state to the open state, and then from the open state to the closed state. When the swinging operation was repeated 50 times, it was determined that a pleasant click feeling persisted and the click feeling was good. In addition, Table 1 shows the results of performing chute clogging evaluation on the hinge cap provided with this membrane hinge.

[Example 5]
Except for the change in the composition of the plant-derived polyethylene (58% by mass) and the fossil fuel polyethylene (42% by mass) (the synthetic resin material is 58% Corg.renew and the modern carbon ratio is 60 pMC). In the same manner as in Example 4, a hinge cap including a membrane-like hinge containing a plant-derived polyolefin was integrally formed by injection molding.

  After removing the hinge cap with a membrane hinge containing a plant-derived polyolefin molded by injection molding from the mold, the hinge mechanism (3) is swung to close the hinge cap with the membrane hinge. When heat-fixed by heat treatment for 1 week at a temperature of 40 ° C. as a lid state, no distortion of the shape was observed.

  For a hinge cap having a membrane-like hinge containing a plant-derived polyolefin after heat setting, the hinge mechanism (3) is swung from the closed state to the open state, and then from the open state to the closed state. When the swinging operation was repeated 50 times, it was determined that a pleasant click feeling persisted and the click feeling was good. In addition, Table 1 shows the results of chute clogging evaluation performed on the hinge cap provided with this elastic piece.

[Reference example]
The plant-derived polyethylene was not blended, but the blending change was made by using the fossil fuel polyethylene alone (the synthetic resin material is 0% Corg.renew, and the modern carbon ratio is 0 pMC). In the same manner as in Example 4, a hinge cap having a membrane hinge was integrally formed by injection molding.

  After the hinge cap provided with the elastic piece formed by injection molding is taken out from the mold, the hinge mechanism (3) is swung so that the hinge cap provided with the membrane hinge is in a closed state, and the temperature is 1 at 40 ° C. When heat-fixed by heat treatment for a week, no distortion of the shape was observed.

[Click feeling evaluation and chute clogging evaluation]
For the hinge cap provided with the molded membrane hinge, the operation of swinging the hinge mechanism (3) from the closed state to the open state and then swinging from the open state to the closed state was repeated 50 times. However, it was determined that a pleasant click feeling persisted and the click feeling was good. In addition, Table 1 shows the results of performing chute clogging evaluation on the hinge cap provided with this membrane hinge.

[Comparative Example 1]
Changes in the composition of the fatty acid amide (A) having an unsaturated cis structure carbon double bond with respect to plant-derived polyethylene to 5500 ppm, and the position where the thickness of the membrane hinge (3) is minimized , The position where the thickness of the membrane hinge (3) does not exist between the central portion and the end portion of the membrane hinge (3), that is, the thickness of the membrane hinge (3) is minimum, Therefore, except for the change in the thickness structure of the membrane hinge (3) where the minimum thickness / center thickness ratio in the membrane hinge (3) was 1.000, the plant was formed by injection molding in the same manner as in Example 1. A hinge cap comprising a membrane hinge containing the derived polyolefin was integrally molded.

  A film containing a plant-derived polyolefin containing a plant-derived polyolefin molded by injection molding and having a hinge cap provided with a membrane-like hinge removed from the mold and then swinging the hinge mechanism (3). When the hinge cap provided with a cylindrical hinge was closed and heat-fixed by heat treatment at a temperature of 40 ° C. for 1 week, no distortion of the shape was observed.

[Click feeling evaluation and chute clogging evaluation]
For a hinge cap having a membrane-like hinge containing a plant-derived polyolefin after heat setting, the hinge mechanism (3) is swung from the closed state to the open state, and then from the open state to the closed state. When the swinging operation was repeated 50 times, a slightly stronger click feeling was felt. In addition, Table 1 shows the results of performing chute clogging evaluation on the hinge cap provided with this membrane hinge.

[Comparative Example 2]
The fatty acid amide (A) having an unsaturated cis structure carbon double bond corresponds to the trans-9,10-octadecenoamide [trans structure of the unsaturated fatty acid amide of the formula (A ₁ ). ] (Single use), with a plant-like polyolefin containing a plant-derived polyolefin in the same manner as in Comparative Example 1 except for the change in the composition of 2000 ppm with respect to the plant-derived polyethylene. A hinge cap was integrally formed.

  A film containing a plant-derived polyolefin containing a plant-derived polyolefin molded by injection molding and having a hinge cap provided with a membrane-like hinge removed from the mold and then swinging the hinge mechanism (3). When the hinge cap provided with a cylindrical hinge was closed and heat-fixed by heat treatment at a temperature of 40 ° C. for 1 week, no distortion of the shape was observed.

[Click feeling evaluation and chute clogging evaluation]
For a hinge cap having a membrane hinge that contains a molded plant-derived polyolefin, the hinge mechanism (3) is swung from the closed state to the open state, and then is swung from the open state to the closed state. When the moving operation was repeated 50 times, a slightly stronger click feeling was felt. In addition, Table 1 shows the results of performing chute clogging evaluation on the hinge cap provided with this membrane hinge.

From the results of Table 1, the hinge cap provided with a membrane hinge containing the plant-derived polyolefins of Examples 1 to 5, that is, the modern carbon ratio defined in ASTM D6866-11 is 56.7 to 118 pMC. It was integrally molded from a plant-derived polyethylene or a synthetic resin material containing 130-4000 ppm of fatty acid amide (A) having a plant-derived polyethylene and a fossil fuel-derived polyethylene and having an unsaturated cis structure carbon double bond. A membrane hinge comprising a plant-derived polyolefin integrally formed from a synthetic resin material, comprising a cap body (1), an overcap (2), and a hinge mechanism (3) of the membrane hinge It is a hinge cap, and the membrane hinge (3) has a larger thickness at the end than at the center. And the hinge cap in which the position where the thickness of the membrane hinge (3) is minimum exists between the center and the end of the membrane hinge (3) is:
i) has carbon offset,
ii) It does not contain plant-derived polyethylene, and has a shape stability that does not cause shape distortion by injection molding and heat treatment, as well as a hinge cap provided with an elastic piece of a reference example made of polyethylene derived from fossil fuel,
iii) Since a pleasant click feeling can be obtained continuously, the snapping property is excellent, the chute clogging evaluation is “◯”, and the cap supply transportability is good in the process of attaching the cap to the container. I understood.

  On the other hand, although it contains plant-derived polyethylene having a modern carbon ratio of 104 pMC, the thickness at the end of the membrane hinge (3) is larger than the thickness at the center portion. The position where the thickness of 3) is the minimum is not present between the central part and the end part, and further contains a large amount of fatty acid amide (A) having an unsaturated cis structure carbon double bond as 5500 ppm. The hinge cap of Comparative Example 1 and the hinge cap of Comparative Example 2 that does not contain the fatty acid amide (A) having an unsaturated cis-structured carbon double bond have a strong click feeling and evaluation of shoot clogging. It was "x", and it was suggested that the transportability of the cap supply is not good in the process of attaching the cap to the container.

The present invention relates to a cap main body attached to the mouth and neck of a container, an overcap covering the top of the cap main body, and the overcap swinging between a closed state and an open state with respect to the cap main body A hinge cap integrally formed from a synthetic resin material, comprising a hinge mechanism that can be connected, and containing a polyolefin having a modern carbon ratio of 56.7 to 118 pMC as defined in ASTM D6866-11, The following a) to c):
a) The hinge mechanism is a hinge mechanism of a membrane hinge in which both end portions are coupled along the outer peripheral surface of the cap body and the outer peripheral surface of the overcap, respectively.
b) The membrane hinge is
b-1) The thickness at the end is greater than the thickness at the center of the membrane hinge,
b-2) A position where the thickness of the membrane hinge is minimized exists between the central portion and the end portion, and
c) The hinge mechanism is made of a synthetic resin material containing 100 to 4500 ppm of fatty acid amide (A) having an unsaturated cis structure carbon double bond.
By being a hinge cap having a membrane-like hinge containing a plant-derived polyolefin, it is integrally molded from a synthetic resin material having a carbon offset property and containing a fossil fuel-derived polyolefin. It has a moldability comparable to that of a hinge cap provided with a membrane hinge, has good snapping properties, durability and operability, and has good transferability in cap supply in the step of attaching the cap to the container. Since it is possible to provide a hinge cap provided with a membrane hinge, which is integrally molded from a synthetic resin material containing a plant-derived polyolefin, the industrial applicability is high.

1: Cap body 1a: Screw part 2: Overcap 3: Hinge mechanism (membrane hinge)
3a: Hinge body 3b: Thick part 3c: Both side parts 4: Outlet D: Cap support device (delivery device)
b: container c: cap d: cap supply means e: capper f: gripper

Claims (12)

A cap main body attached to the mouth and neck of the container, an overcap covering the top of the cap main body, and the overcap connected to the cap main body so as to be swingable between a closed state and an open state A hinge cap integrally formed from a synthetic resin material having a hinge mechanism and containing a polyolefin having a modern carbon ratio of 56.7 to 118 pMC as defined in ASTM_D6866-11, comprising the following a) to c):
a) The hinge mechanism is a hinge mechanism of a membrane hinge in which both end portions are coupled along the outer peripheral surface of the cap body and the outer peripheral surface of the overcap, respectively.
b) The membrane hinge is
b-1) The thickness at the end is greater than the thickness at the center of the membrane hinge,
b-2) A position where the thickness of the membrane hinge is minimized exists between the central portion and the end portion, and
c) The hinge mechanism is made of a synthetic resin material containing 100 to 4500 ppm of fatty acid amide (A) having an unsaturated cis structure carbon double bond.
A hinge cap comprising a membrane hinge containing a plant-derived polyolefin.   2. The plant-derived polyolefin according to claim 1, wherein the cap body, the overcap, and the hinge mechanism are made of a synthetic resin material containing 100 to 4500 ppm of fatty acid amide (A) having an unsaturated cis structure carbon double bond. A hinge cap comprising a membrane hinge. The fatty acid amide (A) having an unsaturated cis structure carbon double bond is the following (A ₁ ), (A ₂ ) and (A ₃ ):
(A ₁ ) H ₂ N—CO — (— CH ₂ —) _n —CH═CH — (— CH ₂ —) _n —CH ₃ (where n is an integer in the range of 6 ≦ n ≦ 10);
(A ₂ ) H ₂ N—CO — (— CH ₂ —) _m−2 —CH═CH — (— CH ₂ —) _m —CH ₃ (where m is an integer in the range of 6 ≦ m ≦ 10) And (A ₃ ) H ₂ N—CO — (— CH ₂ —) _{k + 4} —CH═CH — (— CH ₂ —) _k —CH ₃ (where k is an integer in the range of 6 ≦ k ≦ 10); ;
A hinge cap comprising a membrane hinge comprising a plant-derived polyolefin according to claim 1 or 2, which contains at least one fatty acid amide represented by one formula selected from the group consisting of: The fatty acid amide (A) having an unsaturated cis structure carbon double bond is represented by the fatty acid amide represented by the formula (A ₁ ) and the formula (A ₂ ) or (A ₃ ). A hinge cap comprising a membrane hinge comprising a plant-derived polyolefin according to claim 3, which is a mixture with at least one fatty acid amide. The hinge cap provided with the membrane hinge containing the plant-derived polyolefin according to claim 4, wherein m in the fatty acid amide represented by the formula (A ₂ ) is m = n + 1 or m = n−1. The k in the fatty acid amide represented by the formula (A ₃ ) is k = n. The hinge cap comprising a plant-derived polyolefin according to claim 4 and comprising a membrane hinge. The fatty acid amide (A) having an unsaturated cis-structure carbon double bond is a fatty acid amide represented by the above formula (A ₁ ), and the following (A ₁₁ ):
(A ₁₁ ) H ₂ N—CO — (— CH ₂ —) _j —CH═CH — (— CH ₂ —) _j —CH ₃ (where j is an integer in the range of 6 ≦ j ≦ 10, j ≠ n.);
A hinge cap comprising a membrane hinge containing a plant-derived polyolefin according to claim 4, which is a mixture with a fatty acid amide represented by the formula:   The fatty acid amide (A) having an unsaturated cis structure carbon double bond contains a compound having 2 to 4 bonds of unsaturated cis structure carbon double bonds in the molecular structure. A hinge cap comprising a membrane hinge comprising the plant-derived polyolefin according to claim 1.   The plant-derived polyolefin according to any one of claims 1 to 8, wherein the synthetic resin material containing the fatty acid amide (A) having an unsaturated cis structure carbon double bond further contains a saturated fatty acid amide. A hinge cap comprising a membrane hinge.   The said plant-derived polyolefin is a plant-derived ethylene resin, The hinge cap provided with the membrane hinge containing the plant-derived polyolefin of any one of Claim 1 thru | or 9.   A hinge cap comprising a membrane hinge containing the plant-derived polyolefin according to any one of claims 1 to 10, which is heat-set in a closed state.   A hinge cap comprising a membrane hinge, wherein the membrane hinge contains the plant-derived polyolefin according to any one of 1 to 11 having a thick part.

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