KR20020039497A - A base paper for the chip condenser carrier tape - Google Patents

Abstract

PURPOSE: Carrier tape paper which contains a specified amount of soft wood pulp and hard wood pulp, mechanical pulp, reclaimed pulp or mixtures thereof on an upper and lower layer and inner layer of carrier tape paper, reinforces the strength with starch and an imine-based polymer is provided which satisfies the physical properties requested in carrier tape paper and reduces the manufacturing cost. CONSTITUTION: This carrier tape paper is characterized in that an upper and lower layer comprises 70 to 100% by weight of chemical pulp(a ratio of soft wood pulp/hard wood pulp:1/9 to 5/5) and 0 to 30% by weight of mechanical pulp, reclaimed pulp or mixtures thereof as a main component, 1 to 15 parts by weight of starch and 1 to 5 parts by weight of an imine-based polymer, based on 100 parts by weight of the main component and an inner layer comprises 20 to 60% by weight of chemical pulp(a ratio of soft wood pulp/hard wood pulp:1/9 to 5/5) and 40 to 80% by weight of mechanical pulp, reclaimed pulp or mixtures thereof as a main component, 1 to 15 parts by weight of starch and 1 to 5 parts by weight of an imine-based polymer, based on 100 parts by weight of the main component.

Description

A base paper for the chip condenser carrier tape}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a chip capacitor carrier tape paper, and more particularly, to a carrier tape paper having an upper layer and an inner layer manufactured by using a multilayer paper machine. By mixing the appropriate amount according to the upper and lower layers and the inner layer and coating with starch and imine-based polymers to supplement the surface properties of the original paper, the thickness, internal bonding strength, flexibility and stiffness required in the existing products are Of course, the present invention relates to a chip capacitor carrier tape base paper that meets requirements such as peel strength, dimensional stability, and perforated surface of adhesive tapes, thereby effectively recycling resources and reducing manufacturing costs.

Carrier tape, which is used for transporting and storing chip parts, is widely used for the standardized automation work, but it is a product that is discarded after use and manufactured and supplied using only conventional chemical pulp. .

Conventionally, in order to meet the required characteristics of the carrier tape paper, expensive chemical pulp is processed to improve the strength characteristics, and the used carrier tape paper is difficult to sort and mixed together with other old papers to obtain expensive raw materials. This results in an economic loss of using the low price notice.

In this way, the conventional carrier tape base paper is used to produce carrier tape paper using only expensive chemical pulp, which leads to an increase in manufacturing cost and waste of resources. Thus, the above problems are solved and the original functional characteristics of the carrier tape are also inferior. A new level of original land development is urgently needed.

Accordingly, in the present invention, in the carrier tape paper having the upper and lower layers and the inner layer manufactured by using the multilayer paper machine, NB (Soft Wood Pulp, Chang), which is a chemical pulp instead of using only chemical pulp that depends on import as a raw material of the raw paper, Fiber) and LB (Hard Wood Pulp, short fiber) with low price of mechanical pulp, recycled pulp or mixtures thereof in upper and lower layers and inner layer of carrier tape paper, and punching which is disadvantage of mechanical pulp and recycled pulp. The surface condition and strength part are supplemented with low power confession treatment and intellective agent, and the starch and imine-based polymers are coated for surface strength to compensate for the disadvantages of the use of low-cost pulp. Carrier tape paper is manufactured by keeping the cleanliness of the paper to make a chip capacitor carrier tape paper which shows the effect of effective resource utilization and manufacturing cost reduction. To have its purpose.

The present invention provides a carrier tape paper having an upper layer and an inner layer produced using a multilayer paper machine, wherein the upper and lower layers are 70 to 100 weights of chemical pulp (ratio of long fibers / short fibers: 1/9 to 5/5). %, Mechanical pulp, recycled pulp or a mixture of 0 to 30% by weight thereof, as a main component, 1 to 15 parts by weight of starch and 1 to 5 parts by weight of imine-based polymer with respect to 100 parts by weight of the main component, the carrier of the inner layer The tape base is composed of 20 to 60% by weight of chemical pulp (ratio of long fibers / short fibers: 1/9 to 5/5) and 40 to 80% by weight of mechanical pulp, recycled pulp or mixtures thereof, and 100 parts by weight of main component. It is characterized by a carrier tape base paper coated with 1 to 15 parts by weight of starch and 1 to 5 parts by weight of imine based polymer.

Referring to the present invention in more detail as follows.

In the present invention, in the carrier tape paper having the upper and lower layers and the inner layer manufactured by using a multi-layer paper machine, NB (soft wood pulp, long fiber), which is a chemical pulp instead of using only chemical pulp that depends on import as a raw material of the raw paper. And LB (Hard Wood Pulp, short fiber) inexpensive mechanical pulp, recycled pulp or mixtures thereof are contained in upper and lower layers and inner layers of the carrier tape paper, and the punched surface state, which is a disadvantage of mechanical pulp and recycled pulp. Completion of low strength pulverization and strength part with low power confession treatment and intellective agent, and coating starch and imine-based polymer for surface strength to compensate for the disadvantages of using low-cost pulp. The present invention relates to a chip capacitor carrier tape base material that effectively maintains the efficiency of resource utilization and reduces manufacturing costs.

The composition of each of the components contained in the chip capacitor carrier tape base paper according to the present invention will be described in more detail as follows.

Carrier tapes with upper and lower layers and inner layers manufactured by using multi-layer paper machines have chemical pulp (long fiber / short fiber ratio: 1/9 to 5/5) in the upper and lower layers for surface strength and appearance characteristics. Mechanical pulp, recycled pulp, or mixtures thereof are used in an amount of 0% to 30% by weight, and since the external layer does not require any external characteristics, mechanical pulp, recycled pulp, or mixtures thereof are contained in 20 to 60% by weight of chemical pulp. 40 to 80% by weight is used.

In the carrier tape paper manufactured using the multilayer paper machine as described above, if the content of the chemical pulp in the upper and lower layers is less than 70% by weight, the surface is roughened to increase the coating coating amount or the surface is torn off with the tape when the carrier tape is peeled off. It is not preferable because of the problem of chip damage and poor workability. If the content of the chemical pulp in the inner layer is less than 20% by weight, the perforated surface is poor due to the increase in density and the lowering of the internal defect wall. Problems such as contamination and the like occur, which is not preferable. If the amount exceeds 60% by weight, the cost rises, which is not preferable.

In the present invention, 1 to 15 parts by weight of starch and 1 to 5 parts by weight of imine-based polymer are used with respect to 100 parts by weight of the main component, in addition to the main component, cationic starch, general starch, oxidized starch and the like may be used. Polyethyleneimine may be used as the polymer. If the starch content is less than 1 part by weight, it is insufficient to compensate for the decrease in surface strength and internal bonding strength due to the use of mechanical pulp and recycled pulp. In case of overuse of chemicals, problems such as manufacturing cost increase and paper machine contamination are not preferable. In addition, if the content of imine-based polymer is less than 1 part by weight, there is a problem of tearing off the surface due to insufficient coating amount and uniformity of the tape and tearing the surface. Problems arise and are undesirable.

The present invention will be described in detail based on the manufacturing method as follows.

First, a raw paper component is prepared by mixing mechanical pulp, recycled pulp or a mixture thereof with chemical pulp.

In this process, mechanical pulp, recycled pulp, or mixtures thereof do not need to be beaten because the low degree of freedom is 80 ~ 200 ㎖ CSF, and the upper and lower layers are 300 ~ 350 ㎖ CSF, inner layer when using multi-layer paper machine. Is controlled to 80 ~ 300 ml CSF to have properties that alleviate dehydration problems on grassland.

If the degree of freedom is less than 300 ml CSF in the upper and lower layers, there is a problem that the workability decreases due to the decrease in stiffness due to the decrease in thickness, and the chip mounted is damaged due to the occurrence of equity. If it exceeds 350 ml CSF, the surface strength falls and the surface smoothness decreases. The problem of falling off the tape attaching and peeling workability occurs, which is undesirable. In addition, if the degree of freeness in the inner layer is less than 80 ml CSF, as in the surface layer, there is a problem in that the chip is damaged due to the decrease in workability due to the decrease in stiffness due to the decrease in thickness, and the stakes are generated. Due to the weakening of the internal bond strength of the base paper and the decrease of the interlayer bond strength, the ground structure is destroyed, which causes problems such as damage to the mounted chip and deterioration in workability of the chip.

Next, the raw paper is prepared by adding starch and subsidiary materials such as imine-based polymers to the base paper.

The starch is used as a positive starch 0.1 ~ 1.5% by weight compared to the total raw material to improve the internal bond strength, the general starch is diluted to 0.5 ~ 5% for the bonding strength between the layers of the wet paper machine (Wet) process Sprayed externally to bond the wetlands. In addition, the state of the perforated surface and the tensile strength is higher than the reference by the positive starch and the like contained for improving the interlayer bonding, and the stiffness depending on the thickness has the same thickness irrespective of the raw material composition, so the stiffness is higher than the standard.

In addition, in order to prevent a part of the paper from falling off when the tape is peeled off, in order to improve the surface strength, which is a property related thereto, 0.1 to 3.0 g / m ^{2 is} coated on the surface of the paper by oxidizing starch oxide at a concentration of 1 to 10%. Imine-based polymers are prepared at the same concentration to treat the surface with the same coating amount, thereby preventing the fibers from transferring from paper to the tape or tearing off and affecting the chip parts.

If the starch oxide and imine-based polymer is coated on the paper surface, if less than 0.1 g / m ^{2 is} coated, there is a problem that the surface strength of the paper decreases and surface tearing occurs due to the contact between the tape and the fiber, and 3.0 g / m ^2. Overcoating is more undesirable because it causes a problem that the manufacturing cost increases due to overcoating.

In order to protect the mold of the perforator, the ash is maintained at less than 5%. To this end, paper recycling techniques such as flotation, washing and cleaning have been incorporated into the raw material processing process to reduce the ash derived from the recycled pulp. If the ash content is more than 5%, not only the wear of the perforator die but also the contamination of the mounted chip due to dust generation is not preferable.

Hereinafter, the present invention will be described in more detail based on the following examples, but the present invention is not limited by the examples.

Examples 1-6

Each carrier tape paper was prepared by the composition as shown in the following Table 1 and the method described below.

The chemical pulp is adjusted to 330 ml CSF of Yeosu, and the mechanical pulp, recycled pulp or mixture thereof, which is 150 ml CSF, is dissociated, mixed with each layer of multi-layered paper machine, and 1.25 parts by weight of positive starch is added to prepare raw paper. The surface was then coated with 1.5 g / m ² of the starch oxide and polyethyleneimine. The paper machine speed was 90 m / min.

Example 7

A carrier tape base paper having a standard thickness was prepared by combining the base paper produced in Example 1 with the base paper prepared in Example 6.

Example 8

Two sheets of the base paper produced in Example 2 were combined to prepare a carrier tape base paper having a standard thickness.

Example 9

Two sheets of the base paper prepared in Example 3 were combined to prepare a carrier tape base paper having a standard thickness.

Example 10

Carrier tape paper of standard thickness was prepared by adding 1 paper of Example 1 to 2 sheets of paper produced in Example 4.

Example 11

Three sheets of the base paper produced in Example 5 were combined to prepare a carrier tape base paper having a standard thickness.

Example 12

Three sheets of the base paper produced in Example 6 were combined to prepare a carrier tape base paper having a standard thickness.

Comparative Examples 1 to 3

Each carrier tape paper was prepared by the composition shown in Table 1 and the method shown in Example 1.

Comparative Example 4

A carrier tape base paper having a standard thickness was prepared by adding 1 base paper of Comparative Example 3 to two base papers prepared in Comparative Example 1.

Comparative Example 5

The carrier tape base paper of the specification thickness was produced by combining the base paper manufactured by the comparative example 2.

Comparative Example 6

Three sheets of base paper prepared in Comparative Example 3 were combined to prepare a carrier tape paper having a standard thickness.

Test Example 1: Property Test

The physical properties of the carrier tape base paper produced in Examples 7 to 12 and Comparative Examples 4 to 6 were measured based on the following method, and the results are shown in Table 2.

<Test method>

(1) internal bond strength

Measured by the method specified in T541 of the TAPPI Standard Test Method (Scott bonding

Strength Tester).

(2) Stiffness

It was measured by the method specified in T489 of the TAPPI standard test method (TABER method).

(3) Carrier tape peel strength

After the carrier tape was cut to 8 mm in width and perforated, the carrier tape was adhered to the surface and measured using a reverse peel strength meter.

(4) Dimensional stability

After standing at 40 ° C., 90% relative humidity, and 48 hours in a thermo-hygrostat, the thickness and width were measured to calculate the rate of change from the room temperature.

(5) Perforated surface state

Among carrier tapes drilled with a punching machine (Tokyo Eld Model TWA-6000), cut into 30m length and check visually.If the perforated surface with remaining fibers is less than 5%, 1st grade, 5-10%, 2nd grade In case of more than 10%, it was classified as 3 grade (not available).

When the physical property test was carried out in the same manner as above, the usable properties of the carrier tape paper were 600 ± 50, 750 ± 50, 950 ± 50 in thickness (μm), internal bonding strength was 270 or higher, and stiffness was 620 if the thickness was 600 ± 50 If the thickness is 750 ± 50, it should be 1100 or more, if the thickness is 950 ± 50, 1600 or more, the peel strength should be within the range of 25-40, and the dimensional stability should be 0.5% or less.

As can be seen in Table 2, the carrier tape base of Examples 7 to 12 according to the present invention can be used as a carrier tape compared to the carrier tape base prepared only with conventional chemical pulp, thickness, internal bonding strength, stiffness, peel strength Physical properties such as dimensional stability, punctured surface state, etc. showed similar physical properties and proved to be very excellent. However, the comparative example outside the composition range of the starch and the imine-based polymer included in the present invention had no utility beyond the range of peeling strength that can be used as a carrier tape paper as shown in Table 2.

Carrier tape base paper having an upper layer and an inner layer manufactured by using a multi-layer paper machine according to the present invention, unlike the prior art using only expensive chemical pulp as raw material of raw paper, inexpensive mechanical pulp, recycled pulp or mixtures thereof Use a certain amount according to the upper and lower layers of the paper and the inner layer, and prepare the carrier tape paper by coating with starch and imine-based polymer.The thickness and internal bonding strength, flexibility and stiffness required of the carrier tape paper, as well as the peeling strength of the adhesive tape It is not only excellent in functional characteristics such as dimensional stability, drilling surface state, but also economical effect of effective resource utilization and manufacturing cost reduction.

Claims (3)

In the carrier tape base paper having an upper layer and an inner layer manufactured by using a multilayer paper machine, The upper and lower layers are mainly composed of 70 to 100% by weight of chemical pulp (ratio of long fibers / short fibers: 1/9 to 5/5) and 0 to 30% by weight of mechanical pulp, recycled pulp or mixtures thereof, and main component 100 1 to 15 parts by weight of starch and 1 to 5 parts by weight of imine-based polymer are coated with respect to parts by weight, The inner layer is composed of 20 to 60% by weight of chemical pulp (ratio of long fibers / short fibers: 1/9 to 5/5) and 40 to 80% by weight of mechanical pulp, recycled pulp or mixtures thereof, and main component 100 A carrier tape base paper, characterized in that 1 to 15 parts by weight of starch and 1 to 5 parts by weight of imine-based polymer are coated with respect to parts by weight. The carrier tape base paper according to claim 1, wherein the imine-based polymer uses polyethyleneimine. The carrier tape of claim 1, wherein the starch and the imine-based polymer are coated by 0.1 to 3.0 g / m ^2, respectively.