JPS5982496A - Synthetic paper for stainless 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 Generally, when manufacturing thin stainless steel sheets, a roll of stainless steel sheet is wound around one periphery of a metal cylindrical tube, and is taken out one by one from the end, and is heated to a pressure of over 100 tons and a temperature of over 200°C. It is then rolled into a second prepared metal cylindrical tube. The stainless steel plate wound around the second metal cylindrical tube is again passed through a rolling process at a pressure of 100 tons or more and a temperature of 200° C. or more, and then wound into the first metal cylindrical tube. Thereafter, by repeating this process, a stainless steel plate with a desired thickness is manufactured. However, when a stainless steel plate is rolled, strong tightening pressure is naturally applied to the stainless steel roll wrapped around a metal cylindrical tube, which can cause scratches on the stainless steel surface.
This will significantly reduce the commercial value of the product.

Kraft paper is generally wrapped around the surface of the stainless steel roll as a cushioning material to prevent this problem.
Kraft paper thermally decomposes extremely rapidly in the presence of rolling oil, which is added to improve the lubricity of stainless steel surfaces.
The kraft paper must be frequently replaced with new kraft paper, which has significantly reduced labor productivity and work efficiency.

In general, the following four characteristics are required for a buffer material in the stainless steel rolling process.

(1) It must be able to withstand thermal decomposition during the stainless steel rolling process at high temperatures.

(2) The morphological stability of the cushioning material itself can be maintained.

(3) The surface must be smooth to maintain shape stability during stainless steel rolling.

(4) Must have strength retention properties (durability) to maintain long-term morphological stability.

Therefore, the inventor of the present invention arrived at the present invention as a result of extensive research in order to satisfy the above-mentioned required properties and to solve the problems of conventional kraft paper.

The present invention is characterized in that it is a web consisting essentially of polyester fibers, and intertwining points between fibers fused and bonded by polyester are present on at least one entire surface of the web. "Synthetic paper for cushioning material in the stainless steel rolling process."

Polyester mainly refers to polyester obtained from polyethylene terephthalate, polybutylene terephthalate, or ethylene glycol and p-oxybenzoate, and polyethylene terephthalate is the most preferred. It is well known that polyethylene terephthalate can be obtained by polycondensation of an ethylene glycol component and a terephthalic acid (ester) component. No problem.

"Substantially" means 100% polyester fibers, or polyamide fibers in addition to polyester fibers to the extent that they do not impair the functions and effects of the second objective of the present invention.

This means that polyolefin fibers and the like may be partially mixed.

The polyester web can be obtained by a dry method or a wet method in which the polyester web is once spun and stretched, then cut into short fibers, and then made into a web. For example, in the case of a wet method, the fineness of the polyester fiber is preferably in the range of 0.2 to 10 deniers. If it is less than 0.2 denier, it is insufficient to maintain the strength of the synthetic paper. If it exceeds 10 denier, the surface smoothness of the synthetic paper will be impaired. Both are undesirable because they reduce the morphological stability of the synthetic paper. Fiber length is 2
It is preferably in the range of ~30 tnya, and may be a crimped yarn crimped by a conventional method. If the fiber length is less than 2 mm, it becomes difficult to cut into such ultrashort fibers by ordinary means. If it exceeds 30 times, the uniformity of dispersion during web creation will decrease.

The method of producing a web by a wet method does not require two special methods, and any conventionally known method can be used. 4? In addition, fibrous binder or antioxidant,
The use of stabilizers, such as antistatic agents, provides a favorable temperature effect. Further, it is generally preferable that the web has a higher density.

The web obtained by the dry method or wet method preferably has a basis weight in the range of 20 to xoO, F/G. 20 Ii
/711, it is difficult to maintain the strength required for synthetic paper for cushioning materials. If it exceeds lo o , S2/m', the time required for web preparation, heat treatment, etc. increases by one hour, which is not economical. Unable to maintain the strength required as a wetsuit. If it exceeds 0.25, the synthetic paper for cushioning material will be deformed due to the strong crimp pressure (shear stress) in the rolling process, which will impair the morphological stability, which is not preferable.Furthermore, the synthetic paper for cushioning material of the present invention is A polyester-fused NW in which the intertwining points between fibers are fused and bonded by the polyester to form -C; for intertwining, a method in which low-oriented, low-melting-point polyester powder is sprinkled on the web and then subjected to heat-pressure treatment.

A method in which low-oriented low-melting point polyester fibers or undrawn polyester fibers are homogeneously mixed with drawn polyethyl fibers having a normal melting point and then subjected to heat-pressure treatment, or a method in which a polyester solvent is sprayed onto a polyester short fiber web and then heat-pressure treatment is performed. etc. can be used. Regardless of the method used, the synthetic paper for cushioning materials of the present invention is made by fusion-bonding webs of short polyester fibers with polyester, and the intertwining points between the fusion-bonded fibers are formed during the stainless steel rolling process. The vine used as a cushioning material in the synthetic paper must be present on at least one entire surface of the synthetic paper. All intertwining points between fibers on both sides or inside the synthetic paper may be fused and bonded, but
In that case, it is necessary to strictly select the heat and pressure conditions so that the synthetic paper does not lose its flexibility and become rough and hard.

The polyester synthetic paper of the present invention has better heat resistance than conventionally used kraft paper, especially against rolling oil (mineral oil).
Form stability at high temperatures in the presence of 1 strength retention (rigidity), especially folding strength, is significantly improved, so there is no need to frequently replace the cushioning material during the stainless steel rolling process.
Also, unlike kraft paper, there is no problem of burning on the stainless steel surface during use and contaminating the product. Additionally, since it has better thermal stability than kraft paper, it can be rolled at higher temperatures, increasing the productivity of stainless steel sheets.

Hereinafter, the present invention will be specifically described with reference to Examples, but the present invention is not limited to these Examples.

Example 1. Comparative Example 1 Polyethylene Tele 7 Tanto Stretched Short Fiber with Fiber Length of 1.5 Denier and 5.0 Ayu (50 it%) To1
．． 17' Neil, 5. OIFJ's polyethylene terephthalate undrawn short fibers (50 weight percent) were fractionated in water and subjected to wet paper-making, followed by thermocompression bonding at 220°C and 100°C with a linear pressure of 9/cx to produce polyester terephthalate synthetic paper. The fabric weight of the obtained synthetic paper was 54.0.9/ba.

On the other hand, kraft paper, which is made by a conventional method and is currently used as a stainless steel cushioning material, was used as a comparison sample. (Weight: 54.8, p/m') First, each sample was cut into a rectangle measuring 25 cm wide and 30 cm long to prepare a sample. Next, this sample was immersed in mineral oil (manufactured by Nisseki Unibres ■, FR90) K, compressed with a mangle roller (3 dazzles/d pressure), and subjected to the following experiment.

Oil resistance and heat stability were determined by placing two clean stainless steel plates in a hot press set at 150°C, placing a sample between them, and taking samples out at regular intervals to measure the physical properties shown in Table 1. The pressure is 1001g/c++ for each sample! I adjusted it accordingly.

Table 1 Based on JIS P8115-1976 (vertical direction) Example 2 0.5 denier, 10I+lI+ polyethylene tele7
Tanto drawn short fibers (50%) and 1.1 denier 5ml polyethylene terephthalate undrawn lead fibers (
50% by weight) was used to produce synthetic paper by a wet method according to the method of Example 1 (basis weight 58!/vl'). This is real bm
The material was heated under pressure of 160°C and 1ookg/m for 24 hours using the same rolling method as in Example 1. The same sample of kraft paper as in Comparative Example 1 was used.

Table 2 Example 3 2.0 denier + 151 nM polyethylene terephthalate field fiber (40% by weight) and 1.1 denier.

5-fin polyethylene terephthalate undrawn staple fiber (60
Synthetic paper was produced by a wet method using the method of Foil Collection Example 1 using a nail needle (fabric weight: 4211/1rl).

Fold this in half lengthwise and heat at iso℃ to 100 9/
The mixture was heated under pressure for 100 minutes under a pressure of Cl. The same kraft paper used in Comparative Example 1 was used. The strength and elongation of the folded portion and the folding resistance are shown in Table 3, confirming the excellent performance of the synthetic paper of the present invention.

Table 3 Procedural amendment 1980, month Q day Commissioner of the Patent Office 1.Display of the incident Patent vA No. 57-189095 2 Name of the invention Stainless steel cushioning material piece synthetic paper 3 Person making the amendment Relationship to the case Patent π1 applicant 1-11 Minamihonmachi, Higashi-ku, Osaka City (300) Teijin Ltd. Representative #1 Deku Song Chifu (1) J! The correction for writing l' is as shown in Attachment 1.

(2) Amendments to the claims should be made in Attachment 2.

(3) In the line of the following page of Specification 7W, correct the word "buffering material" to "buffering material."

(4) On page 8, lines 10-11 [......(
Made by Nisseki Unipres ■, FR9Q) ......" is replaced with "... Nisseki ■ product, Unipres FR-90)"
"..." I corrected myself.

Attachment 2 Claims A web consisting essentially of polyester fibers,
1. A synthetic paper utilizing loose black in a stainless steel rolling process, characterized in that interlacing points between fibers bonded by polyester are present on at least one surface of the web.

Claims (1)

[Claims] A web consisting essentially of polyester fibers,
A synthetic paper for use as a cushioning material in a stainless steel rolling process, characterized in that there are a small number of entangled points between fibers fused and bonded by polyester on the entire surface of one side of the web.