JPS5968229A - Plastic film coating and its manufacture - 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 plastic film coating and a method for producing the same, and more specifically, the present invention relates to a plastic film covering and a method for manufacturing the same, and more particularly, the present invention relates to a plastic film covering that closely covers the surface of an object such as a box-shaped container or a cushioning pad along the unevenness. This invention relates to a plastic film covering and a method for manufacturing the same.

Objects such as box-shaped containers and buffer pads are sometimes painted for various purposes such as coloring, increasing strength, and imparting antistatic properties, but it is easy to paint complex surfaces without defects. The present invention is an object in which the surface of an object is closely coated with a plastic film along the unevenness, instead of painting, and a method for manufacturing the same, which eliminates the disadvantage of covering the surface of a complex shape. can be done.

That is, the present invention provides the recess (1) and the four outer peripheral edges of the bottom (2).
) A plastic film (3) is closely attached along the side surface of the recess (1) of an object having a groove (1), and a plastic film (6) is applied to the four outer peripheral edges (2) of the bottom of the object with trenches to cover the object. film coating and a recess 1") r (
Cover the plastic film (6) from the opposite side of the object, and press the plastic film (6) along the surface of the object by degassing from the four holes (4) in the recess (1) of the object. This invention is a method for manufacturing a plastic film covering, which is characterized in that the bottom outer circumferential recess (2) of an object is tightly coated by narrowing with a knife.

The plastic film coating of the present invention can be manufactured using a skin packer. Fig. 1 shows the operation of coating a buffer box body with an antistatic plastic film using a skin packer according to the method of the present invention. This is a cross-sectional view for explanation (note that the plastic film is very thin compared to the size of the object, but to make it easier to understand, it is drawn thicker than the actual method; the same applies to the drawings below). ) (6) is an antistatic plastic film, (5) is a cushioning polyethylene foam side plate, (6) is a cushioning polyethylene foam bottom plate, (C is a paperboard bottom plate, (8)
is the heater of the skin packer, (9) is the decompression plate of the skin packer that has a deaeration hole (10) on which the box is placed and exhausts the air from the bottom surface, and (4) is the exhaust provided in the recess (1) of the box. The hole, (a) shows the vertical tangent line drawn to touch the side surface of the box when it is laid flat, and (b) shows the lower limit of the point of contact between (a) and the box. The bottom outer peripheral edge of the box body is recessed to form four bottom outer peripheral edge parts (2). In the box shown in Fig. 1, the bottom outer periphery recess (2) is provided below the vertical side plate (5), so the lower limit of the point of contact with the box of the tangent line (A) that touches the box is It becomes point (b). Point (b) is above the bottom of the box.

The plastic film (3) is heated and softened with a heater (8), and the plastic film (6) or pressure reducing plate (9) is heated and softened.
(If you move the pressure reduction plate (9), the box placed on the pressure reduction plate (9) will also move), cover the recess (1) side of the box with the plastic film (6), and remove the pressure reduction plate ( 9) Press the plastic film (6) onto the surface of the box by applying gas pressure between the upper and lower surfaces of the plastic film (6) by exhausting air from below.

FIG. 2 shows a state in which the plastic film (6) has been deformed by gas pressure bonding and is pressure bonded to the surface of the box.

In FIG. 2, the plastic film (3) is narrowed down to the bottom outer circumferential recess (2) of the box and is tightly coated. In other words, the plastic film (6) is tightly adhered along the surface of the box formed by the side plates (5) and the bottom plate (6), and the lower limit (ro) of the contact point of the vertical line (A) on the side surface is ) The bottom below the point is also covered with plastic film (6
) is tightly coated.

FIG. 3 is a cross-sectional view of the completed box covered with plastic film, which is obtained by taking out the box shown in FIG. 2 and removing the excess plastic film, that is, the plastic film covering according to the present invention. be. The recess (1) is completely covered with the plastic film (6) and is therefore watertight, and the edge of the plastic film (b) is narrowed down to the bottom outer peripheral recess (2) (i.e.
Because the vertical tangent line (a) is squeezed to a point lower than the lower limit (b) of the contact point (b), there is no peeling from the end and the appearance is beautiful.

FIG. 4 shows another example of a box made in a similar manner. In the example shown in Fig. 4, the outer periphery of the bottom of the box, which is composed of side plates (5) and bottom plate (6) made of integrally molded expanded polystyrene, is made into a single shape, thereby forming a recess (2) in the outer periphery of the bottom. is forming. The plastic film (6) is narrowed down to the bottom outer peripheral edge four parts (2) K and tightly covered. In other words, there is a bottom outer peripheral recess (2) below the lower limit (b) of the point of contact with the vertical line of the box, and (b)
The point is located above the bottom of the box, and the plastic film (6) is narrowed down to the bottom of the point (b) and is in close contact, so there is no peeling from the edge, and the plastic film (6) is in the recess (1) of the object. The purpose of providing the exhaust holes (4) is to allow the plastic film (6) to adhere to every corner of the recess (1) when the air is removed. Therefore, recess (1)
If it has a rectangular parallelepiped shape as shown in FIGS. 1 to 4, it is preferable to provide an exhaust hole at least in a part of the bottom corner.

1. If the recess (1) is hemispherical, as shown in FIG. 5, for example, it is preferable to provide an exhaust hole (4) at least in the deepest part.

Furthermore, if there are multiple recesses (1) as shown in Figure 6, each recess (1)
It is common to provide an exhaust hole (4) for each.

In the present invention, the objects covered by the plastic film are not particularly limited, and include plastic molded products, plastic foam molded products, metal parts and products, and ceramic products such as glass. parts and products,
Most of the materials such as those made of wood are used.

In addition to the exemplified covering for the buffer box body, the present invention can be used for various purposes such as coloring and increasing the strength of various buffer pads, coloring metal parts, rustproof coating with transparent film, surface protection coating of glass products, etc. It is useful as a surface coating method for articles such as 1. However, when a plastic film (filter) is used as an antistatic film to coat a plastic molded product or a foamed plastic molded product, the coating is antistatic. Become a ζ thing. The coating coated with electric protection IL in this way is
Can be used as a tray or container for C parts.

[Brief explanation of drawings]

Figure 1 is a cross-sectional view illustrating the operation of covering a buffer box with an antistatic IF plastic film using a skin packer according to the method of the present invention, and Figure 2 shows the state after the state shown in Figure 1 over time. A cross-sectional view showing a state in which the plastic film is brought into close contact with the buffer box body after degassing.
Figure 6 is a cross-sectional view of the finished product of the covered box after undergoing the conditions shown in Figures 1 and 2. Figure 5 is a cross-sectional view showing a plastic film covering with hemispherical recesses; Figure 6 is a cross-sectional view showing a plastic film covering with multiple recesses on an object; FIG. (1)...Recess, (2)...Bottom outer periphery recess, (3)
...Plastic film, (4) ...Exhaust hole, (
5)... Side plate, (6)... Bottom plate, (7)... Paperboard bottom plate, (8)... Heater, (9)... Pressure reducing plate,
(10)... Deaeration hole, (a)... Tangent line, ←)...
Lower point of contact. Applicant Asahi Kasei Industries Co., Ltd. Agent Yutaka 1) Yoshio Figure 5! 6th cause

Claims (1)

[Claims] 1) A plastic film is closely attached along the surface of the recess of an object having a recess and a recess on the outer periphery of the bottom, and the plastic film is narrowed to cover the recess on the outer periphery of the bottom of the object. Plastic film covering 1. 2) A plastic film is covered from the recess side of an object having a recess and a bottom outer peripheral recess, and an exhaust hole is provided in the recess,
A plastic film covering product characterized in that the plastic film is tightly coated along the surface of the object by degassing through the exhaust hole in the recess of the object and applying gas pressure bonding to narrow the plastic film to the recessed part of the bottom outer periphery of the object. manufacturing method.