KR101304414B1 - Synthetic string used in tennis racket - Google Patents

Synthetic string used in tennis racket Download PDF

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Publication number
KR101304414B1
KR101304414B1 KR1020120042101A KR20120042101A KR101304414B1 KR 101304414 B1 KR101304414 B1 KR 101304414B1 KR 1020120042101 A KR1020120042101 A KR 1020120042101A KR 20120042101 A KR20120042101 A KR 20120042101A KR 101304414 B1 KR101304414 B1 KR 101304414B1
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South Korea
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string
synthetic
polyester
synthetic string
tennis racket
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KR1020120042101A
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Korean (ko)
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초 현 전
남 열 마
영 석 배
인 식 신
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해성엔터프라이즈 주식회사
한국섬유개발연구원
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Priority to KR1020120042101A priority Critical patent/KR101304414B1/en
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    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B51/00—Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings
    • A63B51/02—Strings; String substitutes; Products applied on strings, e.g. for protection against humidity or wear
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B51/00—Stringing tennis, badminton or like rackets; Strings therefor; Maintenance of racket strings
    • A63B51/02—Strings; String substitutes; Products applied on strings, e.g. for protection against humidity or wear
    • A63B51/023—Strings having characteristics varying along the length of the string, e.g. diameter or elasticity
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2209/00—Characteristics of used materials
    • A63B2209/02—Characteristics of used materials with reinforcing fibres, e.g. carbon, polyamide fibres

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  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Compositions Of Macromolecular Compounds (AREA)
  • Artificial Filaments (AREA)

Abstract

PURPOSE: A synthetic string for a tennis racket is provided to contain polyethylene terephthalate or polytrimethylene terephthalate and polyester elastomer. CONSTITUTION: A synthetic string for a tennis racket comprises 70-99 wt% of polyethylene terephthalate or polytrimethylene terephthalate, and 1-30 wt% of a polyester elastomer in which polyester blocks are dispersed within a polyetherester matrix. The polyester block is a polybutyl terephthalate block. The polyetherester matrix is a polytetramethylene ether ester block.

Description

테니스 라켓용 합성 스트링{Synthetic string used in tennis racket}Synthetic string used in tennis racket}

본 발명은 테니스 라켓용 합성 스트링(Synthetic string)에 관한 것으로서, 보다 구체적으로는 내구성과 동시에 탄성력이 우수한 테니스 라켓용 합성 스트링에 관한 것이다.
The present invention relates to a synthetic string for tennis rackets (Synthetic string), and more particularly to a synthetic string for tennis rackets excellent in durability and elasticity.

테니스 라켓용 합성 스트링의 경우 테니스공을 타격시 가해지는 외력에 잘 견딜수 있도록 우수한 내구성이 요구됨과 동시에 테니스공을 타격시 테니스공의 반발력을 높힐 수 있도록 뛰어난 탄성력도 요구된다.Synthetic strings for tennis rackets require excellent durability to withstand the external force applied to hitting the tennis ball, and at the same time, excellent elasticity is required to increase the resilience of the tennis ball when hitting the tennis ball.

그럼에도 불구하고 기존의 테니스 라켓용 합성 스트링들은 우수한 내구성과 탄성력을 동시에 구비하지 못하였다.Nevertheless, existing synthetic strings for tennis rackets did not have excellent durability and elasticity at the same time.

구체적으로, 기존의 테니스 라켓용 합성 스트링으로는 나일론 소재로 제조된 합성 스트링; 모노필라멘트 형태인 폴리에스테르 소재로 제조된 합성 스트링 또는 인공섬유를 여러겹 꼬아서 만든 소재로 제조된 합성 스트링 등이 주로 사용되어 왔다.Specifically, conventional synthetic strings for tennis rackets include synthetic strings made of nylon material; Synthetic strings made of polyester material in the form of monofilament or synthetic strings made of a material made by twisting artificial fibers have been mainly used.

그러나, 나일론 소재로 제조된 종래의 합성 스트링은 제조비용이 저렴하나 내구성이 나빠 사용 수명이 짧고 탄성력도 부족한 문제점이 있었다.However, the conventional synthetic string made of nylon material has a problem in that the manufacturing cost is low, but the durability is short, the service life is short, and the elastic force is also insufficient.

또한, 모노필라멘트 형태인 폴리에스테르 소재로 제조된 종래의 합성 스트링은 내구성은 우수하나 탄성력이 부족한 문제점이 있었다.In addition, the conventional synthetic string made of a polyester material in the form of a monofilament has a problem of excellent durability but lack of elasticity.

또한, 인공섬유를 여러겹 꼬아서 만든 소재로 제조된 합성 스트링은 타구감 및 탄성력은 상대적으로 우수하나 내구성이 크게 부족한 문제점이 있었다.In addition, a synthetic string made of a material made of multiple layers of artificial fibers has a problem that the ball feel and elasticity is relatively excellent but the durability is largely insufficient.

한편, 대한민국 공개특허 제2012-0029114호에서는 (ⅰ) 폴리에틸렌테레프탈레이트 및 폴리트리메틸렌테레프탈레이트 중에서 선택된 1종의 수지 70~95중량%와(ⅱ) 폴리에틸렌 및 폴리프로필렌 중에서 선택된 1종의 수지 5~30중량%의 혼합 소재로 제조된 합성 스트링을 제안하고 있으나, 상기 합성 스트링은 탄성력이 우수한 수지 소재가 포함되지 않아 내구성은 우수하나 탄성력이 다소 부족한 문제점이 있었다.
On the other hand, Korean Patent Publication No. 2012-0029114 discloses (i) 70 to 95% by weight of one resin selected from polyethylene terephthalate and polytrimethylene terephthalate, and (ii) one resin selected from polyethylene and polypropylene. Although a synthetic string made of 30% by weight of a mixed material has been proposed, the synthetic string does not include a resin material having excellent elasticity and thus has excellent durability but a slight lack of elasticity.

본 발명의 과제는 앞에서 설명한 종래의 테니스 라켓용 합성 스트링의 문제점들을 해결할 수 있도록 내구성이 우수함과 동시에 탄성력도 뛰어난 테니스 라켓용 합성 스트링을 제공하는 것이다.
An object of the present invention is to provide a synthetic string for tennis rackets excellent in durability and excellent elasticity to solve the problems of the conventional synthetic string for tennis rackets described above.

이와 같은 과제들을 달성하기 위해서 본 발명에서는 (ⅰ) 내구성이 우수한 폴리에틸렌테레프탈레이트 또는 폴리트리메틸렌테레프탈레이트 70~99중량%와 (ⅱ) 탄성력이 우수한 폴리에스터계 탄성체 수지(Polyester type elastomer) 1~30중량%의 혼합 수지를 압출, 성형하여 테니스 라켓용 합성 스트링을 제조한다.
In order to achieve the above problems, the present invention provides 70 to 99% by weight of polyethylene terephthalate or polytrimethylene terephthalate having excellent durability and (ii) Polyester type elastomer having excellent elasticity. Extruded and molded by weight of the mixed resin by weight to prepare a synthetic string for tennis rackets.

본 발명에 따른 테니스 라켓용 합성 스트링은 폴리에틸렌테레프탈레이트 또는 폴리트리메틸렌테레프탈레이트를 전체중량대비 70~99중량% 함유하여 내구성이 우수함과 동시에 상기 폴리에스터계 탄성체 수지(Polyester type elastomer)를 전체중량대비 1~30중량% 함유하여 탄성력도 뛰어난 효과가 있다.
Synthetic string for tennis rackets according to the present invention contains 70 to 99% by weight of polyethylene terephthalate or polytrimethylene terephthalate, the excellent durability and at the same time the total polyester type elastomer (Polyester type elastomer) 1 to 30% by weight of the elastic force is also excellent effect.

이하, 본 발명을 상세하게 설명한다.Hereinafter, the present invention will be described in detail.

본 발명에 따른 테니스 라켓용 합성 스트링은 (ⅰ) 폴리에틸렌테레프탈레이트 및 폴리트리메틸렌테레프탈레이트 중에서 선택된 1종의 수지 70~99중량%와 (ⅱ) 하드 세그멘트인 폴리에스터 블럭들이 소프트 세그멘트인 폴리에테르에스테르 메트릭스 내에 분산되어 있는 폴리에스터계 탄성체 수지(Polyester type elastomer) 1~30중량%의 혼합수지로 구성됨을 특징으로 한다.Synthetic string for tennis rackets according to the present invention is a polyether ester of (i) 70 to 99% by weight of one resin selected from polyethylene terephthalate and polytrimethylene terephthalate and (ii) polyester blocks of hard segments are soft segments. It is characterized by consisting of a mixed resin of 1 to 30% by weight of polyester type elastomer (Polyester type elastomer) dispersed in the matrix.

본 발명의 제1구현예로서, 테니스 라켓용 합성 스트링은 폴리에틸렌테레프탈레이트 70~99중량%와 상기 폴리에스터계 탄성체 수지(Polyester type elastomer)의 혼합 소재를 압출, 성형하여 제조된다.As a first embodiment of the present invention, a synthetic string for tennis rackets is produced by extruding and molding a mixed material of polyethylene terephthalate 70 to 99% by weight and the polyester-based elastomer resin (Polyester type elastomer).

본 발명의 제2구현예로는, 테니스 라켓용 합성 스트링은 폴리트리메틸렌테레프탈레이트 70~99중량%와 상기 폴리에스터계 탄성체 수지(Polyester type elastomer)의 혼합 소재를 압출, 성형하여 제조된다.In a second embodiment of the present invention, a synthetic string for tennis rackets is produced by extruding and molding a mixed material of polytrimethylene terephthalate 70 to 99% by weight and the polyester-based elastomer resin.

상기 하드 세그멘트인 폴리에스터 블럭이 폴리부틸렌테레프탈레이트 블럭이고, 상기 소프트 세그멘트인 폴리에테르에스테르 메트릭스가 폴리테트라메틸렌에테르에스테르 블럭이다.The polyester block as the hard segment is a polybutylene terephthalate block, and the polyetherester matrix as the soft segment is a polytetramethylene ether ester block.

상기 합성 스트링의 단면 형태는 원형 또는 정육각형등이며, 상기 합성 스트링의 직경은 1.10~1.54㎜인 것이 바람직하다.The cross-sectional shape of the composite string is circular or regular hexagonal, and the like, and the diameter of the composite string is preferably 1.10 to 1.54 mm.

본 발명에 따른 테니스 라켓용 합성 스트링을 제조하는 방법 중 일례를 살펴보면, 압출기 내에 (ⅰ) 폴리에틸렌테레프탈레이트 및 폴리트리메틸렌테레프탈레이트 중에서 선택된 1종의 수지 70~99중량%와 (ⅱ) 하드 세그멘트인 폴리에스터 블럭들이 소프트 세그멘트인 폴리에테르에스테르 메트릭스 내에 분산되어 있는 폴리에스터계 탄성체 수지(Polyester type elastomer) 1~30중량%의 혼합수지를 투입 용융한 다음, 원형 또는 정육각형 구금을 통해 모노필라멘트 형태로 용융방사한 후 열처리하는 방법으로 합성 스트링을 제조한다.Looking at an example of a method for producing a synthetic string for tennis rackets according to the present invention, 70 ~ 99% by weight of one resin selected from (i) polyethylene terephthalate and polytrimethylene terephthalate and (ii) hard segment in the extruder The polyester blocks are melted in a monofilament form by injecting and melting a mixed resin of 1 to 30% by weight of a polyester type elastomer dispersed in a polyetherester matrix, which is a soft segment. Synthetic strings are prepared by spinning and heat treatment.

이때, 압출기의 성형온도는 250~285℃로 하고, 열처리온도는 200~240℃로 하는 것이 바람직하다.
At this time, the molding temperature of the extruder is preferably 250 ~ 285 ℃, heat treatment temperature is preferably 200 ~ 240 ℃.

Claims (5)

(ⅰ) 폴리에틸렌테레프탈레이트 및 폴리트리메틸렌테레프탈레이트 중에서 선택된 1종의 수지 70~99중량%와 (ⅱ) 하드 세그멘트인 폴리에스터 블럭들이 소프트 세그멘트인 폴리에테르에스테르 메트릭스 내에 분산되어 있는 폴리에스터계 탄성체 수지(Polyester type elastomer) 1~30중량%의 혼합수지로 구성되는 것을 특징으로 하는 테니스 라켓용 합성 스트링.(Iii) 70 to 99% by weight of one resin selected from polyethylene terephthalate and polytrimethylene terephthalate, and (ii) a polyester-based elastomer resin in which polyester blocks, which are hard segments, are dispersed in a polyetherester matrix, which is a soft segment. (Polyester type elastomer) Synthetic string for tennis racket, characterized in that composed of 1 to 30% by weight of mixed resin. 제1항에 있어서, 하드 세그멘트인 폴리에스터 블럭이 폴리부틸렌테레프탈레이트 블럭인 것을 특징으로 하는 테니스 라켓용 합성 스트링.The synthetic string for a tennis racket according to claim 1, wherein the polyester block, which is a hard segment, is a polybutylene terephthalate block. 제1항에 있어서, 소프트 세그멘트인 폴리에테르에스테르 메트릭스가 폴리테트라메틸렌에테르에스테르 블럭인 것을 특징으로 하는 테니스 라켓용 합성 스트링.The synthetic string for tennis rackets according to claim 1, wherein the polyetherester matrix which is a soft segment is a polytetramethylene etherester block. 제1항에서, 상기 합성 스트링의 단면이 원형 및 정육각형 중에서 선택된 1종의 형태인 것을 특징으로 하는 테니스 라켓용 합성 스트링.The composite string for a tennis racket according to claim 1, wherein the cross section of the synthetic string has one form selected from a circle and a regular hexagon. 제4항에 있어서, 합성 스트링의 직경이 1.10~1.54㎜인 것을 특징으로 하는 테니스 라켓용 합성 스트링.The composite string for tennis rackets according to claim 4, wherein the diameter of the composite string is 1.10 to 1.54 mm.
KR1020120042101A 2012-04-23 2012-04-23 Synthetic string used in tennis racket KR101304414B1 (en)

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0796052A (en) * 1993-09-30 1995-04-11 Unitika Ltd String
JP2007282661A (en) * 2006-04-12 2007-11-01 Gosen:Kk Sea island type composite drawn monofilament suitable for string for racket and string for racket
JP2011056132A (en) * 2009-09-11 2011-03-24 Gosen:Kk String for racket
KR20120029114A (en) * 2010-09-16 2012-03-26 한국섬유개발연구원 String for sports racket

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0796052A (en) * 1993-09-30 1995-04-11 Unitika Ltd String
JP2007282661A (en) * 2006-04-12 2007-11-01 Gosen:Kk Sea island type composite drawn monofilament suitable for string for racket and string for racket
JP2011056132A (en) * 2009-09-11 2011-03-24 Gosen:Kk String for racket
KR20120029114A (en) * 2010-09-16 2012-03-26 한국섬유개발연구원 String for sports racket

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