JPS6027529A - Manufacture of buffer material - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a cushioning material in which unevenness is formed on a forming paper using one forming roll, and is a method for manufacturing a cushioning material of this kind used for packaging, etc. For example, the following are known. That is, the forming paper is sequentially fed out from a bundle of wound forming paper, and during this feeding, appropriate moisture is added to the forming paper (after making the forming paper sufficiently flexible with -, the forming paper is transferred to an embossing forming roll). This embossing molding roll, which is used for molding, has irregularities in the circumferential direction and the axial direction, and is used to form irregularities in the continuous direction and the width direction on the above-mentioned forming paper at the same time. C1 After forming the above-mentioned unevenness, it is dried to remove moisture.

However, in such conventional manufacturing methods for cushioning materials, the continuously fed forming paper is directly formed with an embossing forming roll to form irregularities in the continuous direction and the width direction on the forming paper at the same time. Therefore, in the continuous direction, the pressure applied by the embossing forming roll is only applied to the soil area, and when force is applied in the ζ direction, the forming paper is fed out from the end of the book and is pulled.] Although it can sufficiently cope with the force, in the 1h direction, the pressure of the embossing roll is once applied to Vc over the entire width, so the force applied in the shrinking direction becomes particularly large, and the force in the tensile direction becomes Even if the forming paper is moistened in advance to make it flexible, the elongation in the width direction of the forming paper will not be the same as the above-mentioned tension. Unable to follow the force in the direction.
For this reason, when forming with an embossing roll, the thickness of the paper becomes thinner at the border of unevenness in the width direction formed on the forming paper, and in some cases, holes may be formed at the border of unevenness. Even if the formed square paper were able to follow the force in the shrinking direction, the uneven portions would become thin due to forming, and the uneven boundaries would become thinner or holes would form, causing the cushioning material to become thinner. There was a problem in that the elasticity of the cushioning material decreased due to the unevenness of the cushioning material, reducing the original cushioning function of the cushioning material.This invention was made in order to address this conventional problem. The purpose of the present invention is to provide a method for manufacturing a cushioning material that has sufficient elasticity and cushioning function without causing thinning or holes at the uneven boundary of the material.

Specifically, in the method for manufacturing a cushioning material of the present invention,
The continuously fed forming paper is preformed in advance with a preforming roll having uneven stripes in the circumferential direction, and a temporary mold that continues in the continuous direction is made on the forming paper on 1F! - The pre-formed forming paper is formed with an embossing roll that forms the circumferential unevenness of the same width as the circumferential unevenness strip and the axial unevenness tM, and the continuous direction and width are Problem 2 of the conventional method is solved by forming unevenness in the direction and by preventing excessive tensile force in the width direction from being applied to the A section for forming during final laying by the embossing forming roll. It is something.

Hereinafter, this invention will be explained based on the examples shown in FIGS. 1 to 5. In the figure, 1 indicates a bundle of forming paper 2t wound, and from this rolled bundle 1, the above-mentioned forming paper 2 is sequentially and continuously fed out. The forming paper 2 is fed continuously as shown by the arrow in FIG. After this, the forming paper 2 is preformed in the women's direction [2 preform rolls 3 arranged in an eleventh order]. This preforming roll 3 consists of a pair of male and female rolls 6 having uneven stripes 4.5 in the circumferential direction, as shown in FIG. After forming a series of corrugations, the next pre-forming roll 3 forms the corrugations of the forming paper 2 deeper and larger, thereby eliminating excessive force on the forming paper 2 by forming the corrugations all at once. is added to prevent the corrugated boundary from becoming thin or having holes.The number of preform rolls 3 can be increased or decreased at will. The forming paper 2 preformed in step 3 is actually formed by an embossing forming roll 7.This embossing forming roll 7 is
As shown in the figure (, unevenness 8a, 10a in the circumferential direction and in the axial direction)
repeated on the outer peripheral surface, and the unevenness 8a, 1 in the circumferential direction
The width of 0b is determined by the unevenness strip 4 in the circumferential direction of the preform roll 30.
．． It consists of a pair of male roll 112L having approximately the same width as 5 and a female roll 11b having repeated irregularities 8b and 10b corresponding to the irregularities 8a and 10a on the outer circumferential surface. The cushioning material 14 as shown in FIGS. 4 to 6 is formed by repeatedly forming unevenness 12 and 13 in the direction. In this case, the uneven strip 4.5 width of the preform roll 3 and the embossed CI-/l/70 circumferential unevenness 8a, 1
The width and unevenness height of 0a, 8b, and 10b are approximately the same, so the width and height of the corrugation after preforming and the unevenness 8a, 10a-8b in the circumferential direction of the Enphos forming roll 1,
Since the width and height of 10b are approximately the same, during pressure forming with the embossing roll T, there is almost no unreasonable force in the direction of pulling the forming paper 2 against the hood direction. As a result, not only the boundary 15 in the continuous direction of the unevenness 12 and 13 but also the boundary 16 in the width direction will not become thin or have holes, and will have sufficient elasticity and This provides a buffering function. The formed paper 2 formed in this way alone has a sufficient function as a cushioning material, but in a further different embodiment, the formed paper 2 after passing through the embossing molding is shown in FIG. Adhesive 20 is applied to the back surface 17 of the paper via the application roll 18, and then the pressure bonding roll 2 is applied to the back surface 17 of the adhesive 20.
The backing paper 23 is continuously fed out from the bundle 22 through 1.
By pasting these to form the single-sided corrugated board 24, a stronger and more elastic cushioning material can be obtained.
The moisture applied to the forming paper 2 is dried and removed in an appropriate process after forming by the embossing forming roll 7.As explained above, in the method for manufacturing a cushioning material of the present invention, According to the method, a continuously fed forming paper is preformed in advance using a preforming roll having uneven stripes in the circumferential direction to form a continuous corrugated mold on the forming paper, and then the preformed molding is performed. Because the paper is actually formed with an embossing roll having circumferential unevenness and axial unevenness of approximately the same width as the above-mentioned circumferential uneven stripes, the unevenness is formed in the continuous direction and the width direction. When forming with the embossing roll, the forming paper is preliminarily formed with continuous waves of approximately the same width as the circumferential irregularities of the embossing roll, and as a result, when pressurized with the embossing roll, the forming paper is This prevents excessive force from being applied to the paper, reliably prevents the uneven border of the embossed paper from becoming thin or having holes, and ensures sufficient elasticity due to the unevenness of the cushioning material. It has the effect of providing a buffering function.

[Brief explanation of the drawing]

Fig. 1 is a process schematic diagram showing an example of the method for manufacturing the cushioning material of the present invention, Fig. 2 is an enlarged perspective view of the preforming roll shown in Fig. 1, and Fig. 3 is an enlarged perspective view of the Enphos forming roll shown in Fig. 1. figure,
FIG. 4 is a partial plane N of the cushioning material that has been molded, a fifth cross section is a sectional view taken along the line v--v in FIG. 4, and FIG. 6 is a partially enlarged perspective view of the cushioning material. 2...Bundle 3...Preform roll 4
．． 5...Irregularities in the circumferential direction of the preformed roll 7...
... Emboss molding rolls 13a, 9b ... Concavities 10 of embossing molding rolls
a, 10b... Convexity of embossing roll 12.
13...Irregularities of cushioning material 14...Buffering material Fig. 1 Fig. 2 Fig. 3 Fig. 4

Claims (1)

[Claims] The continuously fed forming paper is preformed in advance using a preforming roll having uneven stripes in the circumferential direction to form corrugations continuous in the continuous direction on the forming paper, and then the preformed forming paper is A cushioning material characterized in that the unevenness is formed in the continuous direction and the width direction by main molding with an embossing molding roll having circumferential unevenness and axial unevenness of approximately the same width as the circumferential unevenness strip. manufacturing method.