CN1453129A

CN1453129A - Rainbow reflecting film

Info

Publication number: CN1453129A
Application number: CN 02118802
Authority: CN
Inventors: 魏全坤
Original assignee: Individual
Current assignee: Individual
Priority date: 2002-04-26
Filing date: 2002-04-26
Publication date: 2003-11-05

Abstract

The rainbow reflecting film consists of several homogeneous superthin film layers, of which the two outer layers are relatively thick transparent thermoplastic resin layers and each of the inside layers has the thickness equal to the wavelength of visible light. The inside layers are alternately arranged films of polyacrylic acid resin and polymer mixture resin, which consists of polybutylene terephthalate, butylene terephthalate-glycol copolymer and linear low-density polyethylene. The film may be cut into linear parts and may be used as decorative protection material.

Description

Rainbow reflecting film

Technical field

The present invention relates to a kind of plural layers, particularly a kind ofly splitting can not take place, the rainbow reflecting film that wood property is tough.

Background technology

Its refractive index of rainbow reflecting film is 0.03, is preferably more than 0.06, is to be made by a plurality of two kinds transparent superthin layer of stack.The tackness of each interlayer of known rainbow reflecting film is very poor, peels off phenomenon through between regular meeting's genetic horizon; This kind diaphragm itself is very fragile again, and the shortcoming of easily breaking when using is arranged.Disclose the rainbow reflecting film that has polybutylene terephthalate (PBT) (PBT) is become with the mutual lamination of superthin layer of polymethacrylates (PMMA) in special fair 4-40681 number of the Japan Patent.Rainbow reflecting film according to this, though can improve the tackness of each interlayer, to solve the problem of each splitting, the intensity of diaphragm is also insufficient, therefore its intensity deficiency and difficulty cuts to some extent can cut into wire on the diaphragms such as sticking in polyester of generally still needing when desiring to be cut into wire or fillet sheet and using.

In view of this, this creator has the present invention to produce through the further investigation exploitation eventually.

Summary of the invention

The present invention will provide a kind of rainbow reflecting film, makes it splitting can not take place with solution, and its wood property is tough, and can directly be cut into thin-line-shaped technical problem.

It is such solving the problems of the technologies described above the technical scheme that is adopted:

A kind of rainbow reflecting film, it is the multilayer diaphragm that a kind of transparent thermoplastic resin is made, at least 20 layers resin superthin layer with homogeneous thickness constitutes, it is characterized in that: the thickness of each superthin layer is the wavelength of visible light degree, and the superthin layer that adjoins each other is by being made of two kinds of different materials, one is an acrylic resin, and another is the polyblend of polybutylene terephthalate (PBT), polybutylene terephthalate (PBT) elastomer and wire low density polyethylene (LDPE);

This polybutylene terephthalate (PBT): polybutylene terephthalate (PBT) elastomer: the cooperation percentage by weight of wire low density polyethylene (LDPE) is: 80～95: 3～15: 0.5～5;

This polybutylene terephthalate (PBT) elastomer is the copolymer of polybutylene terephthalate (PBT) and polyethylene glycol.

The present invention is a kind of plural layers, by having being constituted near 20 layers ultra-thin rete at least of homogeneous thickness, other has two top layers is thin layers of being made by thick slightly transparent thermoplastic resin, the thickness of each superthin layer beyond this two thin layer is the visible wavelength degree, and the superthin layer that respectively adjoins each other is made of two kinds of different resin materials, one is an acrylic resin, and another is a polybutylene terephthalate (PBT), the polybutylene terephthalate (PBT) elastomer of the copolymer of polybutylene terephthalate (PBT) and polyethylene glycol and the polyblend of wire low density polyethylene (LDPE); Because the present invention is as a kind of acrylic resin that is to use of the superthin layer of mutual lamination, and the another kind of polyblend that is to use polybutylene terephthalate (PBT) and polybutylene terephthalate (PBT) elastomer and wire low density polyethylene (LDPE), with this, can improve the tackness of two interlayers, and successfully improve all intensity of diaphragm.Polymerization by cooperating elastomer and wire low density polyethylene (LDPE) more can improve all elasticity by its effect that multiplies each other, and then can all invest resistance to impact to diaphragm.At this, form the copolymer that the polybutylene terephthalate (PBT) elastomer can use polybutylene terephthalate (PBT) and polyethylene glycol, make this rainbow reflecting film splitting can not take place thereby solved, its wood property is tough, and can directly be cut into thin-line-shaped technical problem.

The present invention is simple in structure, by using PMMA as the low-refraction diaphragm and use the PBT of A composition and the polyblend of the wire low density polyethylene (LDPE) of the PBT elastomer of B composition and C composition, mutual lamination forms the ultrathin membrane more than 20 layers, be that can obtain not can splitting, wood property is tough, and it has the diaphragm of beautiful cangiante lustre; It is a kind of rainbow reflecting film that superthin layer constituted by a plurality of visible wavelength thickness, can be used to other material applying of the scraps of paper and cloth sheet etc. as ornamental thin-film material, and can cut into thin-line-shaped, and the rainbow reflecting film that uses with textile material as the decoration of gold thread, silver-colored line etc., and the tool practicality.

Description of drawings

Fig. 1 is a schematic perspective view of the present invention;

Fig. 2 is the local enlarged diagram of 22 parts shown in Figure 1;

Fig. 3 is the local enlarged diagram of 33 parts shown in Figure 2.

The specific embodiment

As shown in Figure 1 to Figure 3, the present invention is made of multilayer superthin layer institute lamination at least, and it comprises first kind of superthin layer 10 and second kind of superthin layer 11 at least, and first kind of superthin layer 10 wherein is to use acrylic resin.

For example can enumerate the polymer of acrylic monomer of the lower molecular weight of methacrylate, ethyl propylene acid esters, butylacrylic acid ester, methyl methacrylate, ethylacrylic acid methyl esters, butylacrylic acid methyl esters etc.Situation according to this, but copolymer with the monomer of other copolymerization used as above-mentioned monomer, and including with the acrylic resin is that the article of principal component also can.

And be to use the polyblend of polybutylene terephthalate (PBT) (A composition), polybutylene terephthalate (PBT) elastomer (B composition) and wire low density polyethylene (LDPE) (C composition) as second kind of superthin layer 11.Polybutylene terephthalate (PBT) as the A composition can use 1, the article of the catalyst polycondensation reaction gained of 4-butanediol and terephthalic acid (TPA) or dimethyl terephthalate (DMT).As long as the polybutylene terephthalate (PBT) elastomer of B composition contains mutual-phenenyl two acid bromide two alcohol ester base and is the rubber-like polymer purpose of attainable cost invention then, can use the copolymer of polybutylene terephthalate (PBT) and polyethylene glycol, be preferably block copolymer.The wire low density polyethylene (LDPE) of C composition can use commercially available various wire low density polyethylene (LDPE)s.General proportion is 0.85～0.93, and melt index (hereinafter referred to as MI) is 1～50.

A composition and B composition are the A composition with the weight percent ratio that cooperates of C composition: the B composition: the C composition is 80～95: 3～15: 0.5～5, and preferably's weight ratio is A composition 85～93%:B composition 5～10%:C composition 1～4%.The weight percent ratio of B composition surpasses at 15% o'clock then can hinder its transparency, then can't improve resistance to impact less than 3% o'clock, can't increase all intensity of diaphragm.The percentage by weight of C composition surpasses at 5% o'clock will hinder its transparency, then can't improve its resistance to impact less than 0.5% o'clock.A kind of superthin layer 11 as diaphragm of the present invention after the three composition melting mixing of A composition and B composition and C composition is used.

Diaphragm 1 of the present invention is to supply with resin melt respectively from two extruders respectively, is made to be combined to form the roll extrusion casting that required dissimilar layer feeding pieces are become with common single header flat diaphragm mould.Aforementioned feeding piece is to be used to form two composition alternating layers.Multi-layer resinous liquid as thin as a wafer is to flow by single header flat diaphragm mould, and at this place, each layer is to be subjected to the effect of mould simultaneously and to be expanded, and finally become the thickness of mould outlet by thinning.The distribution of bed thickness can be changed by importing different supply side modules.Usually appearance thin layer 12 be than

other layer

10,11 for thick, this layer is called cortex.

First kind of superthin layer 10 that the acrylic resin layer is constituted is to account for 30～50% of gross thickness, is to account for 50～70% of gross thickness by second kind of superthin layer 11 that polyblend constituted of A composition, B composition and C composition.For obtaining the gloss of beautiful rainbow, the refractive index of acrylic resin layer is the refractive index of layer in addition than above-mentioned three composition mixed layers, for having more than 0.03, is preferably the difference more than 0.06.Again, superthin layer is the thickness with visible wavelength degree.Also be 3800～8000 degree, lamination is preferably more than 70 layers more than 20 layers at least.

Embodiment: the layer as the lower side of refractive index is to use polymethyl methacrylate (PMMA).As the higher resin of refractive index is to cooperate:

A composition: polybutylene terephthalate (PBT) (PBT) viscosity 1Pa.a 90% (weight);

The copolymer of B composition: PBT and polyethylene glycol (HYREL7246 that uses du pont company to make) 7% (weight);

C composition: (density 0.92, MI is 2 article) 3% (weight) mixes previous materials well, and be supplied to other feeding piece with extruder, and be superficial layer with the hybrid resin, make high refractive index resins: the ratio of low refractive index resin is 2: 1, by 123 layers of the mutual lamination ultrathin membranes of casting die, and obtain the rainbow reflecting film of the present invention that all thickness is 18 μ.Again, the refractive index of the hybrid resin of A composition, B composition and C composition is 1.49.

The thickness of the acryl resin in this diaphragm (PMMA) layer is 0.07 μ, the thickness of hybrid resin layer is 0.15 μ, this diaphragm has good rainbow reflection characteristic, with the be as the criterion longitudinal direction intensity MD of the present embodiment measured of JIS JISK 7128 is 28, transverse direction intensity TD is 24, its can splitting and associativity very tough, when cutting into fine rule, can directly twist thread, its result can obtain having the textile material of good gloss.

Comparative example: known technology uses the PBT except that the hybrid resin layer as the higher side of refractive index, the rainbow reflecting film that produces with the method identical with embodiment 1, its longitudinal direction intensity of the diaphragm of gained MD is 10, and transverse direction intensity TD is 6, though can splitting intensity obviously do not reduce and be the diaphragm that easily breaks.Therefore be originally to feel secure on one's body and must fritter into wire in diaphragm for making textile material.

A kind of rainbow reflecting film of the present invention, be to use with the diaphragm of the disclosed announcement of the special fair 6-40581 communique of Japan Patent and constituted by different resin films, except that not taking place the splitting, more can obtain more tough diaphragm, can directly be cut into thin-line-shaped and effectively utilize in as the purposes of decorating with textile material.

In sum, by using PMMA as the low-refraction diaphragm and use the PBT of A composition and the polyblend of the wire low density polyethylene (LDPE) of the PBT elastomer of B composition and C composition, mutual lamination forms the ultrathin membrane more than 20 layers, be that can obtain not can splitting, wood property is tough, and it has the diaphragm of beautiful cangiante lustre, and its advance, practicality have met the application for a patent for invention important document, so propose application for a patent for invention in accordance with the law.

Claims

1, a kind of rainbow reflecting film, it is the multilayer diaphragm that a kind of transparent thermoplastic resin is made, at least 20 layers resin superthin layer with homogeneous thickness constitutes, it is characterized in that: the thickness of each superthin layer is the wavelength of visible light degree, and the superthin layer that adjoins each other is by being made of two kinds of different materials, one is an acrylic resin, and another is the polyblend of polybutylene terephthalate (PBT), polybutylene terephthalate (PBT) elastomer and wire low density polyethylene (LDPE).

2, rainbow reflecting film according to claim 1 is characterized in that: this polybutylene terephthalate (PBT): the polybutylene terephthalate (PBT) elastomer: the cooperation percentage by weight of wire low density polyethylene (LDPE) is: 80～95: 3～15: 0.5～5.

3, rainbow reflecting film according to claim 1 and 2 is characterized in that: this polybutylene terephthalate (PBT) elastomer is the copolymer of polybutylene terephthalate (PBT) and polyethylene glycol.