EP3817986A1 - Épaulement tubulaire pour récipient - Google Patents

Épaulement tubulaire pour récipient

Info

Publication number
EP3817986A1
EP3817986A1 EP19829917.4A EP19829917A EP3817986A1 EP 3817986 A1 EP3817986 A1 EP 3817986A1 EP 19829917 A EP19829917 A EP 19829917A EP 3817986 A1 EP3817986 A1 EP 3817986A1
Authority
EP
European Patent Office
Prior art keywords
resin
shoulder
tubular
composition
density polyethylene
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
EP19829917.4A
Other languages
German (de)
English (en)
Other versions
EP3817986A4 (fr
Inventor
Sumet LIMATIBUL
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Kimpai Lamitube Co Ltd
Original Assignee
Kimpai Lamitube Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from TH1801004058A external-priority patent/TH1801004058A/th
Application filed by Kimpai Lamitube Co Ltd filed Critical Kimpai Lamitube Co Ltd
Publication of EP3817986A1 publication Critical patent/EP3817986A1/fr
Publication of EP3817986A4 publication Critical patent/EP3817986A4/fr
Pending legal-status Critical Current

Links

Classifications

    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L23/00—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers
    • C08L23/02—Compositions of homopolymers or copolymers of unsaturated aliphatic hydrocarbons having only one carbon-to-carbon double bond; Compositions of derivatives of such polymers not modified by chemical after-treatment
    • C08L23/04—Homopolymers or copolymers of ethene
    • C08L23/06—Polyethene
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2201/00—Properties
    • C08L2201/14—Gas barrier composition
    • C—CHEMISTRY; METALLURGY
    • C08—ORGANIC MACROMOLECULAR COMPOUNDS; THEIR PREPARATION OR CHEMICAL WORKING-UP; COMPOSITIONS BASED THEREON
    • C08L—COMPOSITIONS OF MACROMOLECULAR COMPOUNDS
    • C08L2203/00—Applications
    • C08L2203/10—Applications used for bottles

Definitions

  • Plastic containers are mainly used for food, cosmetic, and toiletry products. There are advantages and disadvantages of using plastics such as having a light weight, a low cost with long lifetime, and absorption of flavors.
  • the plastic container In case of the plastic container, decomposition of the contents is caused due to oxygen remained therein and the inflow of oxygen through a container wall.
  • the plastic container should have the wall composed of a multi-layered structure at a tune body and a barrier at a tube shoulder generally made of a single-layered polyolefin and bonded to the tube body. The contents with strong aromas and flavors can be deteriorated with the oxygen passed through the container at the shoulder area.
  • a conventional method for producing the tube shoulder is compression molding using a single-layered polyolefin, etc , and. then the tube shoulder is bonded to the tube body. Barrier properties of the shoulder may be limited due to choices of tire plastics.
  • the present invention provides a method of preparing tire tube shoulder with good hairier properties and adhesion to the tube body by dry-blending of a polyolefin resin.
  • EP 0473176 B describes a melt-blended resin composition
  • the present invention relates to a method of preparing a tube shoulder having improvement of barrier and adhesion to a tube body, blending of a polyethylene resin and a resin having barrier properties, and molding a composition resulted from the dry-blending according to the method.
  • the present invention provides dry-blending a polyolefin resin, a tie resin, and a. resin having bander properties such as a polyamide, preferably nylon, an ethylene-vinyl alcohol (BVOH) copolymer, or an ethylene hydrophobic copolymer, a cyclic olefin copolymer (COC) prepared by using a conventional process.
  • a polyamide preferably nylon
  • BVOH ethylene-vinyl alcohol
  • COC cyclic olefin copolymer
  • the present invention is a means of avoiding the use of an insert made separately from a special material and served as a bander material. Therefore, the invention can solve all problems related to presence of the insert, much related to shelf life, good material compatibility, and an important aspect of production cost of a tube container.
  • the present invention provides an improvement in barrier properties and adhesion of a tube shoulder using dry-blending a polyolefin resin, particularly a polyethylene (PE) resin, a tie resin, and a resin having barrier properties such as a polyamide, particularly nylon, and an ethylene- vinyl alcohol (EVC'H) copolymer, or an ethylene hydrophobic copolymer, particularly a cyclic olefin copolymer (COC).
  • PE polyethylene
  • tie resin a resin having barrier properties
  • suitable embodiment according to this invention comprising component ratios of a mixture of the polyethylene resin, the tie resin, nylon, and EVOH/COC may be in suitable ranges which will be described in the detailed description of this Invention.
  • the present invention is a means of obtaining the resin having high barrier-properties related to homogenization resulting in that finished product production achieves good barrier properties, and still uses a conventional process without any modified machines, special machines or special process. Therefore, this invention can provide producing of the product by a common process and can extremely reduce preparation of a general means for producing the tube container, where also mostly gives the properties according to requirements. Additionally, this invention also uses processing steps, processing time and processing cost substantially resulting in industrial production.
  • polyolefin resins include: polyethylene (PE) or ethylene alpha-olefin copolymers which may be selected from ultra-low-density polyethylene (ULDPE), low-densit polyethylene (LDPE), medium-density polyethylene (MDPB), high-densi ty polyethylene (HDPE), or linear low-density polyethylene (LLDPE); propylene (PP) which may be selected from isotactic polypropylene, syndiotact.ic polypropylene; olefin copolymers which may be selected from ethylene/propylene copolymers, poly butylene-1 , ethylene/butaue- 1 copolymers, propylene/butane- 1 copolymers, ethylene/propylene/butane-1 copolymers, ethylene/vinyl acetate copolymers, ionically crosslinked olefin copolymers (ionomers), and ethylene/ acrylic ester copolymers.
  • polyethylene PE
  • polypropylene PP
  • the polyolefin resin may be blended with additives such as pigments, anti-sticking agents, UV stabilizers, etc. according to a widely known recipe.
  • an ethylene- vinyl alcohol (EVOH) copolymer is included in the polymer composition, the content of ethylene in the EVOH copolymer is preferably 10-50 %. If the content of the ethylene in the EVOH copolymer is less than 10%, poor processability may be obtained. If the content of the ethylene in the EVOH copolymer Is more t n 50 mo!e%, oxygen and water-vapor bander properties may not be sufficient.
  • EVOH ethylene- vinyl alcohol
  • Cyclic olefin copolymers basically include a!ieyciic hydrocarbon compounds having an ethylenicafiy imsaturated bond and a bicycle ring such as a norbomene ring.
  • This COC consisting of linear olefins and transparent amorphous-based cyclic olefins in contrast to the partially crystalline polyethylene (PE) and polypropylene (PP).
  • PE polyethylene
  • PP polypropylene
  • Polyamides can be nylon 6, nylon 8, nylon 11 , nylon 12, nylon 6,6, nylon 6,10, nylon 10,6 nylon 6/6, 6 copolymers and partly aromatic polyamides.
  • the nylon layer preferably has a thickness of at least 5 to 100 microns in order to improve gas barrier properties.
  • a tie resin according to ibis invention is an anhydride-modified linear low-density polyethylene (LLDPE) resin. It is preferably used as a mixed resin in order to improve bonding of various of resins together, over a wide range of processing conditions and equipments. They are most often used for adhering to EVOH, a polyamide, PE and COG, etc.
  • LLDPE linear low-density polyethylene
  • Heading methods are found extensively worldwide by compression molding, preferably extrusion molding, and injection molding.
  • a molten donut of the resin material according to this invention dropped into the molding station and additionally compressed is performed in order to form the tube shoulder.
  • a composition may be dry-prepared, and may optionally formed in a pellet form before preparing the tube shoulder.
  • this invention provides an improved shoulder made of a polyethylene (PE) resin which may be selected from love-density, medium-density, high-density polyethylene, preferably high-density polyethylene (HDPE), blended with a polyamide which may be selected from nylon and an ethylene-vinyl alcohol (EVOH) copolymer in order to prepare a barrier composition, wherein the adhesive is a tie resin.
  • PE polyethylene
  • HDPE high-density polyethylene
  • EVOH ethylene-vinyl alcohol
  • said improved shoulder has weight ratios of resins contained in the dry-blended resin, based upon the total weight of the composition taken as 100%, comprising:
  • this invention provides an improved shoulder made of a polyethylene (PE) resin which may be selected from high-density, medium-density, or low- densit polyethylene, preferably high-density polyethylene (HOPE), blended with a polyamide which may be selected from nylon and a cyclic olefin copolymer (COC) in order to prepare a barrier composition, wherein the adhesive is a tie resin.
  • PE polyethylene
  • HOPE high-density polyethylene
  • COC cyclic olefin copolymer
  • said improved shoulder has weight ratios of resins contained in the dry-blended resin composition, based upon the total weight of the composition taken as 100%, comprising:
  • composition is subjected to a forming process using an injection process or a compression process in order to obtain a tubular product with said improved shoulder.
  • a modified natural stress cracking resistance test is performed in order to monitor susceptibility of a polyolefin tube shoulder to natural stress-cracking, when it is subjected to the certain condition of the stress and in presence of the environment such as soaps, detergents and the like, etc.
  • the tube shoulder may exhibit mechanical failure by breaking.
  • a reagent used for preparing the environment is the fluoride toothpaste in water with the weight ratio of 3: 1.
  • the tube shoulder is bent and immersed in the reagent at 60 °C for 72 hours. At least 20 specimens must be used in order to represent the stress-cracking failure of each sample.
  • Standard toothpaste is filled into each tube sample, 5 tubes of each sample with equal amount, and each tube sample is weighed and then end-sealed. Thereafter, each tube sample filled with said standard toothpaste is placed into a glass jar conditioned to be at a temperature of 25 °C ana a relative humidity of 70%, and the tube samples are left in said conditions for 12 days, 27 days, 39 days, 45 days, 6.3 days, 78 days, 96 days, and 102 days. The weight loss (%) and the flavor loss are evaluated for each time interval according to the following details.
  • Weight Loss (%) ((Initial Weight - Weight at Given Time Interval) + Initial Weight) x
  • the flavor loss is evaluated by smelling: +-H- high flavor loss; ++ medium flavor loss;
  • Each tube container with the shoulder made fro the mo lien-blended resin composition comprising the polyolefin resin, nylon, and EVOH or COC including tire tie resin causes the shelf life of the product contained therein to be lengthened by improving the properties in order to prevent the weight loss and the flavor loss of the contents as compared with the shoulder made from only HDPE.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Medicinal Chemistry (AREA)
  • Polymers & Plastics (AREA)
  • Organic Chemistry (AREA)
  • Tubes (AREA)

Abstract

L'invention concerne un procédé de préparation d'un épaulement tubulaire présentant une amélioration en termes de barrière et d'adhérence à un corps tubulaire, le mélange d'une résine de polyéthylène et d'une résine ayant des propriétés de barrière, et une composition obtenue à partir d'un mélange à sec.
EP19829917.4A 2018-07-06 2019-06-26 Épaulement tubulaire pour récipient Pending EP3817986A4 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TH1801004058A TH1801004058A (th) 2018-07-06 ส่วนไหล่รูปทรงหลอดสำหรับภาชนะบรรจุ
PCT/TH2019/000019 WO2020009667A1 (fr) 2018-07-06 2019-06-26 Épaulement tubulaire pour récipient

Publications (2)

Publication Number Publication Date
EP3817986A1 true EP3817986A1 (fr) 2021-05-12
EP3817986A4 EP3817986A4 (fr) 2022-06-22

Family

ID=69060476

Family Applications (1)

Application Number Title Priority Date Filing Date
EP19829917.4A Pending EP3817986A4 (fr) 2018-07-06 2019-06-26 Épaulement tubulaire pour récipient

Country Status (2)

Country Link
EP (1) EP3817986A4 (fr)
WO (1) WO2020009667A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114379158B (zh) * 2022-01-20 2022-08-30 广州市瑞高包装工业有限公司 一种防水型纸塑复合软管及其制备方法

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2771024B2 (ja) 1990-08-30 1998-07-02 関西チューブ 株式会社 肩部バリヤー性の向上したラミネートチューブ容器
WO2005115706A1 (fr) 2004-05-27 2005-12-08 Lg Chem. Ltd. Procede de preparation d'un epaulement de tube presentant des proprietes barriere
DE102010042342A1 (de) 2010-10-12 2012-04-12 Huhtamaki Ronsberg Zn Der Huhtamaki Deutschland Gmbh & Co. Kg Tubenlaminatfolie mit wenigstens einer orientierten Barrierelage sowie wenigstens teilweise aus dieser gebildete Tubenverpackung
WO2017078633A1 (fr) 2015-11-02 2017-05-11 Kimpai Lamitube Co., Ltd. Récipient tubulaire avec épaulement constitué de résine mélangée à l'état fondu
SI3463872T1 (sl) * 2016-05-26 2022-05-31 Kimpai Lamitube Co., Ltd. Večplastna fleksibilna folija z visokim zrcalnim sijajem
EP3562670A4 (fr) * 2016-12-27 2020-08-12 Kimpai Lamitube Co., Ltd. Tube stratifié en polyester pour contenant

Also Published As

Publication number Publication date
WO2020009667A1 (fr) 2020-01-09
EP3817986A4 (fr) 2022-06-22

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