KR19990078785A - Method for manufacturing a wrapping material for protection of growing fruits - Google Patents

Abstract

The present invention is a method of manufacturing a packaging material used as a fruit protective bag when manufacturing polyester multifilament yarns containing 0.5 to 3.0% by weight of carbon black to make a black primary yarn, by twisting 5 to 40% of the crimp After granting, it is manufactured by merging into a Maryas organization.

The packaging material of the present invention is not easily discolored against daylight, and the gap between the loops is filled by the crimp so that it can effectively block the sea intrusion with rich elasticity.

Description

Method for manufacturing a wrapping material for protection of growing fruits}

The present invention relates to a method for producing a packaging material used in a fruit protective bag that protects the fruit in the growing season from algae or pests and improves the sweetness of the fruit by increasing the light absorption effect.

Conventional fruit protective bags were prepared by merging nylon yarns dyed in black, as enclosed in Korean Utility Model Publication No. 93-71. The fruit protective bags are not easily discolored due to low daylight fastness. Since the yarn was simply woven into the Maryas organization, there was a problem of damaging the fruit by infestation of pests into the gap between the loop and the loop.

In addition, the above was made of nylon yarn vulnerable to sunlight, so the bag was easily embrittled and there was a closed end that can be used only once.

In addition, a fruit protective packaging material which was dyed under high temperature and high pressure using polyester yarn instead of nylon yarn was known, but this also could not completely solve the problem of discoloration caused by sunlight and damage caused by infestation.

The present invention is to provide a method of manufacturing a fruit protective packaging material that can be economically produced fruit protective packaging material that can be easily discolored in daylight and can minimize damage caused by pests.

A black polyester multifilament primary yarn is prepared by adding carbon black to the step of polymerizing the polyester polymer or the step of melt spinning the polymer.

At this time, the content of the carbon black is preferably to be 0.5 to 3.0% by weight relative to the weight of the yarn.

If the carbon black content is less than 0.5% by weight, the blackness is lowered, so that the light absorption effect is weak. If the carbon black content is more than 3.0% by weight, the inorganic content is excessive in the yarn, resulting in poor radiation workability and an increase in manufacturing cost of the yarn. There is this.

Followed by twisting the black polyester multifilament yarn To give a crimp.

Combustion can be provided by a conventional combustor, but in view of productivity and the like, a friction disc combustor was used in the present invention.

In the present invention, the crimp rate imparted by flamming was such that the following conditions were satisfied.

ㆍ 5% <Crimp Rate <40%

However, the hydrothermal treatment was performed for 10 minutes at 120 ℃ and the initial load was to be denier × 0.1g.

In the present invention, if the crimp rate is less than 5%, it is difficult to prevent the invasion of the pest because the crimp rate is not only insufficient elasticity of the finished Meriyasu packaging material, but also effectively prevents the gap between loops of the Meriyasu tissue, and if the crimp rate exceeds 40%, the flammable water is excessive This makes the combustion process difficult and increases manufacturing costs.

The present invention provides a crimp to the yarn, so that when the torque inherent in the yarn is woven into the Mary's tissue, the torsion naturally occurs in the packaging material, so that the coating on the fruit is excellent and the effect of preventing the gap between the loops is increased. give.

The fruit packaging material of the present invention is completed by knitting into a Maryas structure.

The Maryas structure is not particularly limited, but in view of productivity and manufacturing cost, it is preferable to make a flat sheet structure and manufacture it in a cylindrical shape.

Example 1

Undrawn yarn was prepared by changing the content of carbon black at the manufacturing stage of the polyester yarn, and burned it with a disc type combustor so that the crimp ratio was 15%. It was covered with apples to grow apples. The results are shown in Table 1.

* Fruit sugar evaluation: 10 apples were tasted and the number of sweet sugars was evaluated.

Evaluated by 10 people to prevent errors caused by individual differences.

The results are evaluated in four stages: poor-normal-good-very good.

Example 2

The stretched yarn containing 2.5 wt% of carbon black and a twisted yarn with a disc combustor were used to impregnate the yarn with crimped yarns to make a wrapping material.

In the present invention, since the yarn used is dope dyeing with carbon black, it has excellent light fastness and is not easily discolored to sunlight, and because it is flammable and gives a crimp, the crimp blocks the gap between the loops to invade the insect. Blocks

In addition, since the packaging material of the Maryas tissue is twisted by the crimp applied to the yarn, the elasticity is further improved and at the same time, the gap between the loops is narrowed by the twist, thereby increasing the action of blocking pest infestation.

Claims (1)

Combustible black polyester multifilament yarns containing 0.5% to 3.0% by weight of carbon black Method of manufacturing a fruit protective packaging material characterized in that the crimp rate is 5 to 40% and then prepared by cutting into a Maryas tissue.