CN101484306B

CN101484306B - Synthetic resin hose

Info

Publication number: CN101484306B
Application number: CN200780024846.7A
Authority: CN
Inventors: 三浦良弘; 沼田健一
Original assignee: Toyox Co Ltd
Current assignee: Toyox Co Ltd
Priority date: 2006-06-30
Filing date: 2007-05-29
Publication date: 2015-07-22
Anticipated expiration: 2027-05-29
Also published as: HK1132224A1; WO2008001571A1; CN101484306A; JP2008006774A; JP4187112B2

Abstract

Surface tackiness of a hose is improved without using a partially crosslinked resin. By heat-molding a hose while mixing a plurality of synthetic resins having different molecular weights in the surface of the hose, particles of the synthetic resins having high molecular weights remain in the molten synthetic resins having low molecular weights, thereby forming fisheyes in the hose surface. Fine projections and recesses due to the fisheyes make the hose surface into a low friction surface.

Description

Plastic conduit

Technical field

The present invention relates to the synthetic resin pipe to the viscosity improving tube-surface.

Specifically, the plastic conduit forming the low frictional properties face with the transparency at tube-surface is related to.

Background technology

In the past, as this plastic conduit, there is following pipe reel sprinkler pipe: tube wall possesses the internal layer forming water flowing road, be located at the resistance to pressure network outside internal layer, cover the skin of resistance to pressure network, at skin, as the polyvinyl chloride resin composition containing partial cross-linked resin, relative to main Corvic, it is made to contain the partial cross-linked resin of 10 ~ 90wt% (preferably 40 ~ 70wt%), or as the polyolefin resin composition containing partial cross-linked resin, relative to main polyolefin resin, it is made to contain the partial cross-linked resin of 10 ~ 50wt% (preferably 20 ~ 50wt%), add the surface modifier of more than at least a kind of 0.1 ~ 1.0wt% simultaneously, carry out extrusion molding and form low frictional properties face, reduce cementability and the frictional resistance of tube-surface thus, cosily carry out winding and the pull-out of pipe reel, and complete there is feeling of high class outward appearance (such as, with reference to patent document 1).

Patent document 1: Japan Patent No. 3639174 publication (2nd ~ 4 pages, Fig. 1)

But, in this plastic conduit in the past, due to melt temperature obvious height compared with the melt temperature of uncrosslinked general resin of partial cross-linked resin, therefore the pipe of the low frictional properties containing partial cross-linked resin is manufactured successively at identical pipe manufacturer production line, when general pipe containing partial cross-linked resin, when manufacturing other general pipes, easily be mixed into the partial cross-linked resin used when manufacture before, as long as be mixed into a little, even if heating-up temperature when improving shaping is also difficult to melting, therefore existence local produces irregular low frictional properties face and becomes the problem of bad product.

And not only partial cross-linked resin is high price, but also need to add surface modifier, so also there is the problem of cost increase.

And, if add the surface modifier of calcium carbonate etc. in partial cross-linked resin, then can not get the transparency, also there is the problem becoming the translucent of ground-glass appearance or whitening.

Summary of the invention

The object of the 1st invention in the present invention is, does not use partial cross-linked resin and improves the viscosity of tube-surface.

The object of the 2nd invention is, except the object of the 1st invention, completes transparent and that design is high pipe.

The object of the 3rd invention is, except the object of the invention recorded except the 1st invention or the 2nd invention, easily and reliably form flake.

For realizing above-mentioned object, the feature of the 1st invention in the present invention is, at tube-surface, the multiple synthetic resin that combined molecular weight is different, carries out hot briquetting and form flake.

The feature of the 2nd invention is, in the formation of the 1st invention, has added and has formed flake densely, using the formation of this tube-surface as milled sand surface at above-mentioned tube-surface.

The feature of the 3rd invention is, in the formation of the 1st invention or the 2nd invention, add the multiple synthetic resin that the above-mentioned molecular weight of mixing differs widely, carried out hot briquetting at the temperature that the melt temperature of the synthetic resin of the HMW in above-mentioned multiple synthetic resin is low and form the formation of flake.

In the present invention, 1st invention is by the different multiple synthetic resin of tube-surface combined molecular weight, carry out hot briquetting, in the low-molecular-weight synthetic resin of melting, as the eyes of fish, remain the particle of the synthetic resin of HMW and form flake at tube-surface, fine concavo-convex by what caused by this flake, tube-surface becomes low frictional properties face.

Therefore, partial cross-linked resin can not be used and improve the viscosity of tube-surface.

Its result, in the same manner as using the plastic conduit in the past of partial cross-linked resin, sticky sense and the cementability (viscosity) of tube-surface can be prevented, cosily can carry out winding and the pull-out of pipe, simultaneously because the coefficient of friction of tube-surface is little, so can abrasion performance be improved.

Especially, when flexible vinyl chloride, owing to being have the different resin of same nature, only average degree of polymerization, therefore transmission refractive index is similar to, and can form the pipe with the transparency.

And, on identical pipe manufacturer production line, manufacturing the pipe of surperficial low frictional properties successively, when not being the general pipe of low frictional properties, if even if the synthetic resin of the HMW used when mistaking the manufacture of the low frictional properties pipe before being mixed into, as long as forming temperature to be brought up to the temperature of this macromolecule resin melting, then become the pellet melting of the macromolecule resin of the non-melting of flake reason and do not remain, thus can not defective work be become, therefore compared with becoming the technology in the past of defective products when being mixed into partial cross-linked resin when mistaking, the management of raw material, the management of especially polluting (contamination) becomes easy, easy manufacture.

And, compared with adding the partial cross-linked resin of high price or the technology in the past of surface modifier with needs, significantly cost can be sought and reduce, the low frictional properties pipe of low price can be manufactured.

2nd invention except the effect of the 1st invention, by forming flake densely at tube-surface, thus produce countless by this flake cause fine concavo-convex, there is refraction and become milled sand surface in the light irradiating them.

Therefore, transparent and that design is high pipe can be completed.

Its result, completes the outward appearance with feeling of high class, can improve commodity value.

3rd invention is except the effect of the 1st invention or the 2nd invention, by the multiple synthetic resin that combined molecular weight or the degree of polymerization differ widely, because the temperature difference of the melt temperature of these macromolecule resins and the melt temperature of low-molecular-weight resin becomes large, therefore by heating between both melt temperatures while carry out shaping, thus the non-molten particles of the macromolecule resin of a lot of quantity is easily remained.

Therefore, can easily and form flake more reliably.

Detailed description of the invention

Plastic conduit of the present invention, by the surface at this tube body, combined molecular weight or the different multiple synthetic resin of the degree of polymerization and hot briquetting, the particle forming the synthetic resin of HMW thus on the surface of tube body remains in the low-molecular-weight synthetic resin of melting, so-called " flake (or flake) " as the eyes of fish, fine concavo-convex by what caused by this flake, entirety or its part on tube body surface become low frictional properties face.

From multiple thermoplastic resin or thermosetting resin etc. that the K value of molecular weight or the degree of polymerization is different, select the synthetic resin of the HMW that its K value is large and melt temperature is high, with K value is little and the low-molecular-weight synthetic resin that melt temperature is low, if heat while pass through such as extrusion shaping machine etc. and carry out shaping in these resins with the temperature lower than the melt temperature of macromolecule resin, then only low-molecular-weight resin melting, the particle of the macromolecule resin of non-melting becomes little spherical and disperse wherein, the situation that these dispersed particles remain as the eyes of fish is called " flake ".

And, preferred above-mentioned flake for tube body surface compact formed, by formed countless by these flakes cause fine concavo-convex, there is refraction and become milled sand surface in the light irradiating them.

And, above-mentioned flake is preferred, if the multiple synthetic resin that combined molecular weight or the degree of polymerization differ widely, then the temperature difference of the melt temperature of these macromolecule resins and the melt temperature of low-molecular-weight resin becomes large, therefore heat while carry out shaping between the melt temperature only both them, in the low-molecular-weight resin of melting easily and the particle of the macromolecule resin of the easily non-melting of residual a lot of quantity.

Below, one embodiment of the invention are described.

Embodiment 1

This embodiment 1 is as disclosed in such as in Japan Patent No. 3639174 publication, the Withstand voltage layer (enhancement Layer) that above-mentioned tube body is internal layer (internal layer) to water flowing road, is formed at the outside of this internal layer winding reinforcement material etc., the skin (skin) of outside entirety covering this Withstand voltage layer carry out the integrally stacked structure formed, above-mentionedly outer fieldly form above-mentioned flake on the whole whole, or only on this outer field outer peripheral face, form above-mentioned flake in a thin film.

In this embodiment, be such as the thermoplastic resin of the ethylene chloride resin of 40 ~ 95 etc. from the K value of molecular weight or the degree of polymerization, the thermoplastic resin of HMW of mixing K value about about 90 and the low-molecular-weight thermoplastic resin of K value about about 55, only have the reliable melting of this low-molecular-weight thermoplastic resin temperature, at such as 150 ~ 180 DEG C, heat while carry out extrusion molding roughly equably on one side at whole circle, flake is formed densely thus at the whole circle in the surface of whole tube body, and as milled sand surface.

Now, by regulating heating and melting temperature, the amount of flake can easily be regulated.

And, as the material of above-mentioned internal layer, preferably corresponding to the pass fluid wherein, select optimal material, simultaneously for improving and outer field cementability, selecting and material that the compatibility of outer field material is excellent or add between skin and form adhesive linkage.

And, as the reinforcement material of above-mentioned Withstand voltage layer, use the synthetic resin line feeder of such as polyester or nylon or aromatic polyamides etc. or the metal line feeder of reinforcing fibre or monofilament (monofilament: ultimate fibre) or such as stainless steel etc., by being rolled into helical form (coiled type) or netted and form along the outer peripheral face of above-mentioned internal layer.

Then, the action effect of this plastic conduit of the present invention is described.

First, hot briquetting is carried out at the tube body surface multiple synthetic resin that just combined molecular weight is different as above-mentioned, the surface of tube body becomes low frictional properties face by caused by flake fine concavo-convex, therefore do not use the partial cross-linked resin disclosed in patent No. 3639174 publication, can be manufactured on the transparent plastic conduit of the not sticky sense in surface or cementability (viscosity) at an easy rate yet.

And, if form flake densely on the whole circle in the surface of whole tube body, then produce countless by these flakes cause fine concavo-convex, there is refraction and become milled sand surface in the light irradiating them, therefore has and can improve design and the advantage that provides feeling of high class.

In addition, if the multiple synthetic resin that combined molecular weight or the degree of polymerization differ widely, the temperature difference of the melt temperature of these macromolecule resins and the melt temperature of low-molecular-weight resin is increased, then the setting range of this forming temperature broadens, therefore, between melt temperature only both them on one side lower design temperature while carry out hot briquetting, the easily particle of the macromolecule resin of residual a lot of quantity, even if having the milled sand surface not carrying out strict temperature setting and also can easily and reliably form flake and cause thus thus.

What be explained is, in the above-described embodiments, showing above-mentioned tube body is the structure of having carried out integrally stacked to internal layer, Withstand voltage layer and skin, in this outer field situation forming flake on the whole or only form flake at this outer field outer peripheral face in a thin film, but be not limited thereto, such as form flake etc. on the surface of the tube body without Withstand voltage layer, also can form flake on the surface of the tube body of other structures.

And the kind of the synthetic resin used or forming method are also not limited to above-mentioned ethylene chloride resin or extrusion molding, also can use the synthetic resin beyond ethylene chloride resin, or use the forming method beyond extrusion molding.

Even if also the action effect same with the above embodiments can be obtained under these circumstances.

Claims

1. the manufacture method of plastic conduit, it is characterized in that, at the multiple synthetic resin that the surperficial combined molecular weight of tube body is different, carry out hot briquetting in higher than the melt temperature of low-molecular-weight resin and lower than the melt temperature of high molecular weight resin temperature and form flake, becoming low frictional properties face by the fine concavo-convex entirety on the above-mentioned surface of above-mentioned tube body or its part of making caused by above-mentioned flake.

2. the manufacture method of plastic conduit according to claim 1, wherein, makes the dispersion of above-mentioned flake fine and close and makes above-mentioned tube-surface be milled sand surface.