阅读说明：本技术 一种高分子发泡无缝缓冲管的制备方法 (Preparation method of high-polymer foamed seamless buffer tube ) 是由 王小卫 于 2019-09-25 设计创作，主要内容包括：本发明涉及一种高分子发泡无缝缓冲管的制备方法,所述无缝缓冲管包括管本体以及包覆在所述管本体表面的发泡缓冲套,所述发泡缓冲套的轴心线与所述管本体的轴心线相重叠,它依次包括以下步骤：(a)将发泡缓冲套套在管本体外；(b)调节管本体两端面与发泡缓冲套对应端面的间距,使其间距为-2~2mm；(c)控制管本体外表面与发泡缓冲套内表面的间距,使其间距为1~2mm；(d)对所述管本体和发泡缓冲套进行加热,使得发泡缓冲套热缩至紧贴在管本体表面即可。通过控制发泡缓冲套和管本体外的位置和间距,并采用加热、热缩的方式使其贴合,不仅简化了无缝缓冲管的结构,也简化了其制作工艺,从而有效地提高了其生产效率并降低了成本。(The invention relates to a preparation method of a high polymer foaming seamless buffer tube, which comprises a tube body and a foaming buffer sleeve coated on the surface of the tube body, wherein the axial lead of the foaming buffer sleeve is overlapped with the axial lead of the tube body, and the preparation method sequentially comprises the following steps of (a) sleeving the foaming buffer sleeve outside the tube body, (b) adjusting the distance between two end faces of the tube body and the corresponding end face of the foaming buffer sleeve to enable the distance to be-2 ~ 2mm, (c) controlling the distance between the outer surface of the tube body and the inner surface of the foaming buffer sleeve to enable the distance to be 1 ~ 2mm, and (d) heating the tube body and the foaming buffer sleeve to enable the foaming buffer sleeve to be closely attached to the surface of the tube body.)

1. A method for preparing a high polymer foamed seamless buffer tube, wherein the seamless buffer tube comprises a tube body (1) and a foamed buffer sleeve (2) coated on the surface of the tube body (1), and the axial lead of the foamed buffer sleeve (2) is overlapped with the axial lead of the tube body (1), and the method is characterized by sequentially comprising the following steps of:

(a) sleeving the foaming buffer sleeve (2) outside the pipe body (1);

(b) adjusting the distance between the two end surfaces of the pipe body (1) and the corresponding end surface of the foaming buffer sleeve (2) to be-2 ~ 2 mm;

(c) controlling the distance between the outer surface of the pipe body (1) and the inner surface of the foaming buffer sleeve (2) to be 1 ~ 2 mm;

(d) and heating the pipe body (1) and the foaming buffer sleeve (2) to ensure that the foaming buffer sleeve (2) is heat-shrunk to be tightly attached to the surface of the pipe body (1).

2. The method for preparing a polymeric foamed seamless buffer tube according to claim 1, wherein the method comprises the following steps: the pipe body (1) is a kraft paper cylinder.

3. The method for preparing a polymeric foamed seamless buffer tube according to claim 1, wherein the method comprises the following steps: the foaming buffer sleeve (2) is made of a high polymer foaming material.

4. The method for preparing the seamless buffer tube foamed by high polymer according to claim 3, wherein the compressive strength of the foamed buffer sleeve (2) is 80 ~ 100Kpa, and the tensile strength is 1800 ~ 2500 Kpa.

5. The method for preparing the seamless buffer tube with foamed polymer according to claim 3, wherein the hardness of the foamed buffer jacket (2) is 32 degrees ~ 65 degrees.

6. The method for preparing a polymeric foamed seamless buffer tube according to claim 1, wherein the method comprises the following steps: in the step (a), the pipe body (1) is positioned by a clamp, and then the foaming buffer sleeve (2) is sleeved.

7. The method for preparing a seamless buffer tube according to claim 1, wherein the heating temperature in step (d) is 60 ~ 70 ℃ and the heating time is 20 ~ 40 minutes.

8. The method for preparing the seamless buffer tube by foaming polymer according to claim 1, wherein the outer diameter of the tube body (1) is 170.4 ~ 182.4.4 mm, the thickness is 9 ~ 15mm, and the thickness of the foaming buffer sleeve (2) is 2 ~ 8 mm.

Technical Field

The invention belongs to the field of film product packaging, relates to a seamless buffer tube, and particularly relates to a preparation method of a high-polymer foamed seamless buffer tube.

Background

The Chinese patent with application number 201910284093.8 discloses a seamless buffer tube for packaging film products, which comprises an inner tube, two bonding rings and a buffer outer tube; the inner pipe is longer than the buffer outer pipe, the inner pipe is inserted into the buffer outer pipe, and two ends of the inner pipe are exposed to two sections of transition ends at two ends of the buffer outer pipe in equal length; the two bonding rings are respectively bonded on the inner walls of the two ends of the buffer outer pipe, and the buffer outer pipe and the inner pipe are firmly bonded; the buffer outer tube also comprises raw material components with specific component content and types. However, the seamless buffer tube needs to be bonded by means of two bonding rings, which results in a complicated structure and production process and low production efficiency.

Disclosure of Invention

The invention aims to overcome the defects of the prior art and provide a preparation method of a high-molecular foamed seamless buffer tube.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows: a method for preparing a high polymer foamed seamless buffer tube, wherein the seamless buffer tube comprises a tube body and a foamed buffer sleeve coated on the surface of the tube body, the axial lead of the foamed buffer sleeve is overlapped with the axial lead of the tube body, and the method sequentially comprises the following steps:

(a) sleeving a foaming buffer sleeve outside the tube body;

(b) adjusting the distance between the two end surfaces of the pipe body and the corresponding end surfaces of the foaming buffer sleeves to enable the distance to be-2 ~ 2 mm;

(c) controlling the distance between the outer surface of the pipe body and the inner surface of the foaming buffer sleeve to be 1 ~ 2 mm;

(d) and heating the pipe body and the foaming buffer sleeve to ensure that the foaming buffer sleeve is thermally shrunk to be tightly attached to the surface of the pipe body.

Preferably, the tube body is a kraft paper cylinder.

Optimally, the material of the foaming buffer sleeve is a high-molecular foaming material.

Further, the compressive strength of the foaming buffer sleeve is 80 ~ 100Kpa, and the tensile strength is 1800 ~ 2500 Kpa.

Further, the softness and hardness of the foaming buffer sleeve are 32 degrees ~ 65 degrees.

Optimally, in the step (a), the pipe body is positioned by a clamp, and then the foaming buffer sleeve is sleeved.

Preferably, in step (d), the heating temperature is 60 ~ 70 ℃ and the heating time is 20 ~ 40 minutes.

Optimally, the outer diameter of the pipe body is 170.4 ~ 182.4.4 mm, the thickness is 9 ~ 15mm, and the thickness of the foaming buffer sleeve (2) is 2 ~ 8 mm.

Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: according to the preparation method of the high polymer foaming seamless buffer tube, the positions and the intervals between the foaming buffer sleeve and the outside of the tube body are controlled, and the foaming buffer sleeve and the tube body are attached by adopting a heating and thermal shrinkage mode, so that the structure of the seamless buffer tube is simplified, the manufacturing process of the seamless buffer tube is also simplified, the production efficiency of the seamless buffer tube is effectively improved, and the cost is reduced.

Drawings

FIG. 1 is a schematic diagram of the structure of a seamless buffer tube of the present invention.

Detailed Description

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings:

the seamless buffer tube shown in figure 1 comprises a tube body 1 and a foaming buffer sleeve 2 coated on the surface of the tube body 1, wherein the axial line of the foaming buffer sleeve 2 is overlapped with the axial line of the tube body 1, concretely, the tube body 1 is usually made of a kraft paper cylinder, the outer diameter of the tube body can be 170.4 ~ 182.4.4 mm, the thickness of the tube body is 9 ~ 15mm, the foaming buffer sleeve 2 is made of a high polymer foaming material (such as EVA foam, and the like, can be sold in the market), the thickness of the foaming buffer sleeve is 2 ~ 8mm, and the physical properties of the foaming buffer sleeve 2 are preferably as follows, the compression strength is 80 ~ 100Kpa, the tensile strength is 1800 ~ 2500Kpa, and the hardness of the foaming buffer sleeve is 32 degrees ~ 65 degrees.

The preparation method of the high polymer foamed seamless buffer tube sequentially comprises the following steps:

(a) positioning the pipe body 1 by using a clamp, and sleeving the foaming buffer sleeve 2 outside the pipe body 1;

(b) adjusting the distance between the two end faces of the pipe body 1 and the corresponding end face of the foaming buffer sleeve 2 to enable the distance to be-2 ~ 2 mm;

(c) controlling the distance between the outer surface of the pipe body 1 and the inner surface of the foaming buffer sleeve 2 to be 1 ~ 2 mm;

(d) the tube body 1 and the foaming buffer sleeve 2 are heated, so that the foaming buffer sleeve 2 is heated to be tightly attached to the surface of the tube body 1, specifically, the heating temperature is 60 ~ 70 ℃, and the heating time is 20 ~ 40 minutes.

While the present application has been described with examples, those of ordinary skill in the art will appreciate that there are numerous variations and permutations of the present application without departing from the spirit of the application, and it is intended that the appended claims encompass such variations and permutations without departing from the spirit of the application.