JPS5831178A - Wall lining material or ceiling lining 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 Invention F: I From a foamed film of polyolefin, this Tf
Q-type or ceiling covering ((related to).

The use of a polyethylene foam film as a polyolefin material 14 as a base material for wall covering material or ceiling covering material (hereinafter referred to as J1 bow ζ "1") is disclosed in, for example, British Patent No. 1, 220 i. No. 053- and No. 1.30
6.573 Specification JJ1: and European Special Wf Publication No. [1,
[1[] Already proposed in the July 1,800 specification. In addition, t2[, European Patent Publication No. 0.001,807 Specification is low density 1] which contains a small amount of rod group-containing ethylene copolymer) 11'? From polyethylene foam film
51. 1 and 2 are described, and the cellular piles forming the form are substantially all independent. The wall covering V1 is said to have advantages, inter alia with regard to its resistance to abrasion and its printability. However, practical experience has shown that closed-cell polyethylene foam 4Q7 coverings can be applied to wallpaper immediately after being applied to the wall surface with the commonly used 1111!l'A water-based adhesive. Blisters are likely to occur, and this is due to localized loss of adhesion between the wall covering material and the wall surface in the atrium.

坏'/+1. The present inventors have now discovered that this drawback can be overcome by providing perforations that extend over the Di of the foamed film and are distributed over the entire surface of the film.
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According to the present invention, a foamed film formed from a thermoplastic polyolefin is used for wall covering or ceiling covering, wherein substantially all the cells in the foam are of the closed cell type and the density thereof is from 0.05 to 0.05. In wall coverings or ceiling coverings in the range of 0.5 V/π, the film is provided with a number of perforations, each of which extends through the entire thickness of the film, and which extends through the entire thickness of the film. J, every 1on' on the surface?
There is provided a wall or ceiling covering material whose characteristic is that the perforations are distributed on the surface of the film in such a manner that the film has an average of 1 to 30 perforations.

41'; Foam film is made of ethylene (high density or low density 1ω
, propylene, butene-1 and 4-methyl- may be formed from any thermoplastic polyolefin, including polymers and copolymers. Ethylene homo] "A copolymer derived from ethylene mixed with one or more other olefins with a part of the total fiL141 of the film or copolymer derived from the coalescence force, e.g. 610 to 70[)1f" It is a film consisting of 11+ of different polymers or co-j(f) of ethylene and a subtotal of the total 1(4') of the foamed film, e.g. Co-tl of 1/n and 1v1 vinyl acid
Foamed films formed from blends with r-coalesce may also be packaged as suitable films.

The above-described foamed films may be manufactured by any of the methods known in the art; these methods are generally high pressure zone.
11 consecutive baths in the low band J); 7. The 111 coalescence of the il is accompanied by extrusion of the 1-1ff coalescence blend, in which a suitable blowing agent is uniformly introduced into the 111 [coalescence month 11] before extrusion. The foaming agent in front u14 is extrusion vortex 1
(I4IIJ examples that produce gases as a result of the chemical decomposition that occurs at゛[a chemically inert liquid (C) which has a boiling point of 1 ffP at extrusion temperature at least 1 (1'C) under the above-mentioned low pressure; Suitable liquids include Hantan, Hegizan and Xian petroleum distillates, Methyl dichloride 1
/n and 1.1.2-trichloro-1,2,2-)lifluoroecne. The proportion of blowing agent is usually polymer or
l: il (7II of the combined blend: ranges from 5 to 15 total; the specific proportions used will depend on the desired density of the foam; inert liquid blowing agent '5)
7 Jll, it is possible to advantageously introduce a small amount of nucleating i'+lI into the material to be extruded, thereby promoting the homogeneity of the cell structure of the foam (44)% 2b The nucleating agent is a thermally decomposable substance of the kind already mentioned;
It can be gas. Extrusion is advantageously carried out through a ζI-shaped die to produce tubular extrudates, and the extrudate is then expanded, flattened and cut into flat 411
Z+ 6 extruded polymers 1. 5 to 20 opacifying agents, ↓ detail &f. It is preferable that it contains pigments with a strength of 1.

It is preferable that the closed cells of the foamed film have an average diameter in the range of (1,r)1 to 1.

After extrusion, known surface treatments can be applied;
It can be subjected to electrical discharge treatment, which improves the printing suitability of the film.
・-Limited support to the surface of the film on which a decorative surface is to be formed, but also covers and adheres to another surface, which can alternatively be joined to a wall surface. 4) Improve your sexuality.

Wall covering materials include 100F++ flexo printing and Clavia printing.

Print the appropriate pattern by any of the 111 techniques such as screen printing or lithographic printing method? give

Instead of trying to print the foam film, in addition to printing one square, the foam film can also be printed with any suitable annual pattern fc Kf
The re-emboss process can be carried out by passing it through the nip between the hard υ1 embossing roll and the backup roll in a known manner. It is a backup roll that stamps a corresponding concave embossed pattern, or a hard backup roll that engraves a corresponding concave pattern. It is preferable to have a thickness in the range of 0.3 to 3.6 tnm. Vl when the film is subsequently embossed, vj in the area compressed by the embossing method.
The thickness may be reduced to a value between 50 and 75 inches of the original unembossed thickness.

Preferably the foam film has perforations! 1.05
Dragon to [ ], with a diameter in the 5 mm range. If desired, the perforations can be provided in a regular geometrical arrangement with respect to the surface of the fill λ, e.g. Preferably, it is distributed non-uniformly on the top.

Preferably, there is an average of 1 to 25 perforations per cm2 of the film surface.

The above-mentioned perforations should be made with appropriate diameter and spacing.
The needle 4 is completely rolled by a hard γF roll that supports the protruding portion of the V-branch or the needle-like portion d on its surface, and an elastic backup roll such as a roll made of felt or a roll cut with corrugated felt. Place the foam film in the nip between the
;ii I decided to make it 4. Easily formed into a foamed film. Rather than uniform perforations, the needles are preferably arranged radially about the roll surface to minimize the tendency to tear the film. Perforation operation & stamping of foam film according to convenience
It can be done before, simultaneously K with printing, or after printing. However, when attempting to emboss a film, it is preferable to carry out this embossing operation after perforation, since the deformation of the film caused by embossing will result in a change in the perforation pattern. The perforations are carried out at a speed customary for printing and embossing wall coverings, i.e. from 20 to 2 QQ.
All these operations can be carried out conveniently with only one advance of the film material, since they can usually be carried out satisfactorily on a continuously moving film at a speed in the range of y+a/min.

The perforated closed cell wall coverings of the present invention overcome or minimize the aforementioned drawbacks of unmodified closed cell wall coverings of forming blisters immediately after being applied to a wall using a water-based adhesive. The wall coverings of the present invention also have longer term advantages compared to unmodified wall coverings in that moisture can find its way within the wall surface and allow moisture to escape through the wall covering to the atmosphere. .

The wall covering of the present invention has a 15 to 2
They generally exhibit water vapor permeability in the range of 1050-1890 f/m2/24 hours, compared to a water vapor permeability of 1 S'/m2/24 hours. The porosity of the perforated material is usually in the range of 0.3 to 3.5 mm/min/100 tyn2/head.

The present invention will now be illustrated by the following examples, but not limited thereto. Blend with copolymer has a thickness of 0.38+u and 0.261f
/lr: tD density and 0.03 to 0.3 tnm (closed cell goo having a cell size in the D range, a foam film 1, a steel back-up roll 2 made of felt and needles arranged radially on the surface) 4. Each of the needles has a length of 6.
Grace, Needle I/:X 1 cln' Portrait 2
They are distributed around the roll surface at a density of 5 symmetrically along the surface. The film is passed through the nip at a speed of t 20 m (7 min). The perforations thus created in the film are clearly visible to the naked eye; their dimensions, when measured, range from 0.3 to 0.4 at their widest point near the surface of the film.
+nm range II! There is a film in Ji! [It was found that the minimum width toward the center of the zomi was in the range of 16 to 19 cities.

The perforated material 5 is subsequently embossed, compressing the film thickness by about 20% in the embossed areas. I measured the dimensions of the hole again and this time it was 0.05 at the smallest width.
It was found to be in the range of ~0.1 fin.

g:'I! Water vapor permeability measurements carried out on the film before and after perforation gave the following results: unperforated film 7 18f/2724 hours perforated film: 147097 m2/24 hours.

[Brief explanation of the drawing]

Figure 1I is an illustrative diagram of an apparatus suitable for manufacturing the wall covering material of the present invention, in which 1 is a film, 2 is a backup roll, 3 is a hard roll, 4 is a needle, and 5 is a perforated material. Represent each.

Claims (1)

[Scope of Claims] 1. A wall covering or ceiling covering made of a foamed film formed from thermoplastic polyolefin, wherein substantially all of the cells in the foam are of the closed cell type and the density thereof is 0.0.
5~0.5? In wall coverings or ceiling coverings in the range /π, the front Niν film is provided with a number of perforations, each of the perforations extending through the entire thickness of the film;
Moreover, the number of perforations per hole on the film surface is 1 on average.
Wall covering or ceiling covering characterized in that the perforations are distributed on the surface of the film so as to provide ~50 frfA. 2. The wall covering material or ceiling covering material according to claim 1, wherein the foamed film is formed from an ethylene homopolymer. 3. The foam film is made of propylene, butene-1 and 4-
Claims are formed from a copolymer of ethylene mixed with one or more comonomers from 1 to 1:, DI, 1 to 70% of the total weight of the coMτ combination. Wall covering material or ceiling tension material 04 described in Sasa Item 1, the foamed film contains a copolymer of ethylene and vinyl acetate in an amount of 4 to 20 g of the total weight of the film, and a homopolymer or copolymer of ethylene. The wall covering material or ceiling covering material according to claim 2 or tf claim 3, which is formed from a blend with a polymer. 5. The wall covering material or ceiling covering material according to any one of claims 1 to 4, which contains an opacifier in an amount of 5 to 20 times the weight of the film material. The wall covering material or ceiling covering material according to any one of claims 1 to 5, wherein the closed cells have an average diameter in the range of 0.01 to 1.0 mm. 2. The wall covering material or ceiling covering material according to any one of claims 1 to 6, wherein the perforation has a diameter in the range of 0.05 to Q.5 am. 8. The wall covering material or ceiling covering material according to any one of Items 1 to 7 of the scope of Patent II+'4, wherein the perforations are distributed non-uniformly on the surface of the film. 9 Range 1 to Pl'18 of Patent No. 1111, in which there are 1 to 25 perforations on average for every 1σ2 of the film surface
Wall covering material or ceiling covering J7L described in any of the paragraphs.