Double-knitted fabric and moldings and mouse pads made thereof

Details Double-knitted fabric and moldings and mouse pads made thereof Double-knitted fabric and moldings and mouse pads made thereof

1997-11-24

1999-10-05

Raimund, Christopher

Fabric (woven, knitted, or nonwoven textile or cloth, etc.)

Knit fabric

Strand is a monofilament composed of two or more polymeric...

442101, 442312, 442319, 66196, 66202, D04B 704

Patent

active

059623497

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

The present invention relates to double-knitted fabrics and moldings and mouse pads made thereof. More particularly, the present invention relates to double-knitted fabrics which are suitably used in heat insulators such as clothing, outfits for protection against cold, curtains and blinds; interior materials for automobiles, ships, airplanes or the like such as under-carpets, carpets, tablecloths, coasters, seat-mats, door materials, seat materials and ceiling materials; cushioning materials for use as linings for helmets, mouse pads, rubberized tapes for cables and medical tapes; and moldings such as brassiere cups, hats, protectors, interlinings, guesses, cases, shoes, bags, gloves, saddles for bicycles and bedspreads, and the present invention also relates to moldings made of the double-knitted fabrics and to mouse pads used when operating a mouse in connection with computers or the like.


BACKGROUND ART

Double-knitted fabrics have been conventionally used in various fields. A tie yarn most popularly used for connecting a face cloth and a back cloth in such double-knitted fabrics is a usual finished yarn. These double-knitted fabrics are mainly used as back cloth in clothing and provide cushioning and heat insulating properties.
Double-knitted fabrics utilizing a heat-bonding fiber as the tie yarn are known, for instance, as knit fabric moldings such as bra cups as disclosed, for instance, in Japanese Patent Publication Kokai No. 4-240252. This is a molding utilizing the stretchability of knit fabric and the moldability of heat-bonding fiber.
In general, when such moldings are used as sewing articles such as seats for automobiles, they are required to have a great seam strength. However, the afore-mentioned molding of a knit fabric which is not particularly made for this purpose cannot hold a satisfactory seam strength. Thus, it is hard to apply such a knit fabric molding to a sewing article such as seats for automobiles or the like.
On the other hand, a three-layer structured knit fabric of two-way tricot is already put on the market, which is an article similar to the afore-mentioned knit fabric molding. In such a three-layer structured knit fabric, a monofilament is employed as the tie yarn in order to improve the cushioning property by a large elastic modulus, and a spandex is used in order to provide a stretchability in vertical and longitudinal directions despite being a tricot fabric. Consequently, such a three-layer structured knit fabric has the disadvantage of being expensive.
Unlike tricots, double-knitted fabrics which are ordinarily produced by using a circular knitting machine are provided with a stretchability in vertical and longitudinal directions through their knitting fabric without using spandex. However, a circular knitting machine cannot knit monofilaments having a large elastic modulus as used in two-way tricots.
Therefore, when producing double-knitted fabric, a heat-bonding yarn has been used as the tie yarn which is soft at the time of knitting and which presents a large elastic modulus after knitting. Double-knitted fabrics which are made by using a heat-bonding yarn as the tie yarn are known to be obtained by fusing the tie yarn through heat treatment after knitting to obtain a large elastic modulus.
However, for portions of articles at which a high cushioning property is required such as inner linings for shoes, tricots are still used at present. The reason why no double-knitted fabric has been used in such fields is that fatigue against repetitive load is large. Thus, if double-knitted fabrics which assume smaller fatigue against repetitive load can be easily manufactured, the uses thereof would be widen, since the manufacturing cost thereof is lower than that of tricots.
At present, various mouse pads for use with computers are sold, and most of them are those formed by laminating a polyurethane sponge onto a knit surface material. In such mouse pads, the surface material improves the gliding of the mouse, and the rolling of the ball is improved by prov

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