CN201096234Y

CN201096234Y - Plastic pipe with oxygen barrier layer

Info

Publication number: CN201096234Y
Application number: CNU2007201744404U
Authority: CN
Inventors: 骆光勤; 王佳仕
Original assignee: Individual
Current assignee: Individual
Priority date: 2007-08-31
Filing date: 2007-08-31
Publication date: 2008-08-06
Anticipated expiration: 2017-08-31

Abstract

The utility model discloses a plastic pipe with an oxygen barrier layer, relating to plastic pipes for conveying hot and cold water. Aiming at solving the problem of high oxygen seepage in plastic pipes for conveying hot and cold water in prior art, the utility model provides a plastic pipe with an oxygen barrier layer, comprising a plastic inner tube which is wrapped with a mucilage layer at the outer wall; the oxygen barrier layer is coated at the outer wall of the mucilage layer. The plastic pipe provided with an oxygen barrier layer is applicable in hot and cold water conveying in both industries and civil construction projects, and is applicable in the pipeline of a floor heating system, a solar energy system, etc.

Description

The plastic tube of band oxidation prevention layer

Technical field

The utility model relates to plastic tube, particularly a kind of plastic tube that is used to carry hot and cold water.

Background technique

Country forbids that Coating Steel Pipe was used for feedwater piping nearly 8 years, and during this period, the material that is used for feedwater piping mainly contains two big classes: a class is to have the metal of resistance oxygen effect and the composite pipe of plastics; Another kind of is common plastics tube, for example: PP-R (atactic copolymerized polypropene) pipe, PE-RT (refractory polyethylene) pipe, PE-X (crosslinked polyethylene) pipe and PB (polybutylene) pipe.Nowadays, feedwater piping material commonly used is a common plastics tube on the market.Wherein, but the PP-R pipe has advantages such as good heat resistance, thermal conductivity are low, hot melt connects and pipe resistance is little and toolability is strong, and the PP-R pipe is widely used in the hot and cold water feedwater piping; PE-RT, PE-X and PB pipe have abrasion resistance, low temperature resistant, anticorrosive, hot melt is connected and the thermal conductivity advantages of higher, be widely used in the floor heating pipeline.Though above-mentioned common plastics tube has lot of advantages, it has a common shortcoming---have the oxygen of oozing.Described common plastics tube is when the water temperature that transmits is relatively lower, it oozes the not obvious of oxygen sex expression, but when the water temperature that transmits raises, the oxygen infiltration amount of described common plastics tube can increase, increase along with the oxygen infiltration amount of described common plastics tube, the oxygen content of hot water also can increase in the pipeline, thereby causes metal heater in hot water (heating) system and metal valve etc. to produce corrosion phenomenon; Simultaneously, because the effect of oxygen under the high temperature also can be quickened the thermo-oxidative ageing of described common plastics tube, thereby reduce the working life of described common plastics tube.

The model utility content

The utility model provides a kind of plastic tube with oxidation prevention layer, and the plastic tube of described band oxidation prevention layer can solve the high problem of oxygen infiltration amount of common plastics tube.

The technological scheme that the utility model adopted is: a kind of plastic tube with oxidation prevention layer comprises: plastic inner pipe, be coated with adhesive-layer at the outer wall of described plastic inner pipe, and be coated with oxidation prevention layer at the outer wall of described adhesive-layer.

The plastic tube of band oxidation prevention layer provided by the utility model has and prevents that pipeline from oozing the oxidation prevention layer of oxygen by coat one deck at the plastic inner pipe outer wall, can solve effectively that there is the high problem of oxygen infiltration amount in plastic tube in the prior art; Because the plastic tube of band oxidation prevention layer provided by the utility model can prevent that pipeline from oozing oxygen, produce etching problem so can prevent metal heater in hot water (heating) system and metal valve etc.; Because the plastic tube of band oxidation prevention layer provided by the utility model is compared with the plastic tube of prior art, oxygen infiltration amount reduces, thus can slow down the aging speed of the plastic tube of band oxidation prevention layer provided by the utility model, thus prolong the working life of pipeline.

Description of drawings

The sectional view of the plastic tube of the band oxidation prevention layer that Fig. 1 provides at outer field the utility model for oxidation prevention layer;

Fig. 2 is the flow sheet of the plastic tube of band oxidation prevention layer shown in Figure 1;

The sectional view of the plastic tube of the band oxidation prevention layer that Fig. 3 provides for oxidation prevention layer the utility model in the mesosphere;

Fig. 4 is the flow sheet of the plastic tube of band oxidation prevention layer shown in Figure 3.

Embodiment

In order to solve the high problem of common plastics tube oxygen infiltration amount that existence is used to carry hot and cold water in the prior art, the utility model provides a kind of plastic tube with oxidation prevention layer, below in conjunction with drawings and Examples the utility model is elaborated.

As shown in Figure 1, the plastic tube of band oxidation prevention layer provided by the utility model comprises: plastic inner pipe 10, be coated with adhesive-layer 20 at the outer wall of described plastic inner pipe 10, and be coated with oxidation prevention layer 30 at the outer wall of described adhesive-layer 20.

Oxygen barrier material commonly used has two kinds on the market now: EVOH (ethylene-vinyl alcohol copolymer) and PVDC (polyvinylidene chloride), and above-mentioned two kinds of materials all can be used as the material of described oxidation prevention layer 30; Because EVOH has high gas-obstructing character (compare with PVDC, the oxygen permeability of EVOH is than the low order of magnitude of PVDC), present embodiment oxidation prevention layer 30 preferred EVOH materials.

The plastic tube of band oxidation prevention layer provided by the utility model, according to its purposes difference, described plastic inner pipe 10 can be managed for PP-R, in PE-RT pipe, PE-X pipe or the PB pipe any one.For example: when the plastic tube of described band oxidation prevention layer was applied in the hot and cold water water supply system, described plastic inner pipe 10 can be managed for PP-R; When the plastic tube of described band oxidation prevention layer was applied in the floor heating system, described plastic inner pipe 10 can be managed for PE-RT, PE-X manages or the PB pipe.

Described adhesive-layer 20 is can adhesion plastic inner pipe 10 and any one tackiness agent of oxidation prevention layer 30, for example: polyvinyl chloride adhesive.

Be that PP-R pipe or PE-RT pipe are example with described plastic inner pipe 10 below, describe:

As shown in Figure 2, the preparation process flow process of the plastic tube of the band oxidation prevention layer that provides at outer field the utility model of oxidation prevention layer is: PP-R or PE-RT material are mixed with color masterbatch; Through high temperature, high pressure the blending material of described PP-R or PE-RT material and color masterbatch is extruded into pipe, this pipe is plastic inner pipe 10 as shown in Figure 1; Use the same method and extrude adhesive-layer and EVOH oxidation prevention layer; Described plastic inner pipe, adhesive-layer is mutually compound with the EVOH oxidation prevention layer, that is: by adhesive-layer described plastic inner pipe and EVOH oxidation prevention layer are combined with each other, obtain the plastic tube of described band oxidation prevention layer; Plastic tube cooling forming with described band oxidation prevention layer; Plastic tube with described band oxidation prevention layer after printing, drawing cuts (if described plastic inner pipe is the PE-RT pipe, then it being carried out the cutting of PE-RT coil pipe) according to preassigned length; At last, the plastic tube to the band oxidation prevention layer produced detects packing.

As shown in Figure 3, another embodiment for the plastic tube of band oxidation prevention layer provided by the utility model, the plastic tube of the band oxidation prevention layer that present embodiment provided comprises: plastic inner pipe 10, outer wall at described plastic inner pipe 10 is coated with adhesive-layer 20, outer wall at described adhesive-layer 20 is coated with oxidation prevention layer 30, described oxidation prevention layer 30 outer walls are coated with adhesive-layer 20, are coated with plastic outer tube 40 on adhesive-layer 20 outer walls that coat on described oxidation prevention layer 30 outer walls.

The plastic tube of the band oxidation prevention layer that present embodiment provided, because it comprises plastic inner pipe 10 and plastic outer tube 40, so, when described plastic inner pipe 10 and plastic outer tube 40 are the PP-R pipe, its thermal conductivity is lower, when being used for the hot and cold water feedwater, its better heat preservation can reach the purpose of saving resource more.

As shown in Figure 4, its oxidation prevention layer of plastic tube of the band oxidation prevention layer that provides for the utility model is in the preparation process flow process in mesosphere, and its oxidation prevention layer of plastic tube of the band oxidation prevention layer that provides with the utility model shown in Figure 2 is in outer field preparation process flow process difference: present embodiment adopts the coextru-lamination technology plastic inner pipe, plastic outer tube, two-layer adhesive-layer and oxidation prevention layer to be combined into the plastic tube of band oxidation prevention layer provided by the utility model.

In the process of using, described oxidation prevention layer is at the plastic tube of outermost band oxidation prevention layer, when being connected use with other pipe fittings, must be earlier the EVOH oxidation prevention layer on the plastic tube surface of described band oxidation prevention layer be dialled with special-purpose stage property and remove totally, and then the common plastics tube (for example: PP-R pipe and PE-RT manage) of internal layer is carried out hot melt with other pipe fittings be connected; Described oxidation prevention layer is at the plastic tube of the band oxidation prevention layer in mesosphere, being connected with other pipe fittings when using, can directly carry out hot melt with described other pipe fittings and be connected.The method that described hot melt connects is identical with the method that PE-RT pipe hot melt is connected with existing common PP-R pipe.

Plastic pipe with oxidation prevention layer provided by the utility model is by in original common plastics tube (example Such as: PP-R pipe, PE-RT pipe, PE-X pipe or PB pipe) outer wall coats one deck and has and prevent that pipeline from oozing the resistance of oxygen The oxygen layer can effectively solve original common plastics tube and have the problem of oozing oxygen; Because the utility model The plastic pipe with oxidation prevention layer that provides can prevent that pipeline from oozing oxygen, so can prevent hot water (heating) Metal heater in the system and metal valve etc. produce etching problem; Because band provided by the utility model The plastic pipe of oxidation prevention layer is compared with the plastic tube of prior art, and oxygen infiltration amount reduces, so can slow down this reality With the novel aging speed with the plastic pipe of oxidation prevention layer that provides, thereby prolong service life of pipeline.

Plastic pipe with oxidation prevention layer provided by the utility model can be widely used in industry and civil buildings The hot and cold water feedwater of engineering especially is applied in the pipe-line systems such as floor heating and solar energy.

Claims

1. plastic tube with oxidation prevention layer comprises: plastic inner pipe, it is characterized in that the outer wall of described plastic inner pipe is coated with adhesive-layer, and the outer wall of described adhesive-layer is coated with oxidation prevention layer.

2. the plastic tube of band oxidation prevention layer according to claim 1 is characterized in that, described oxidation prevention layer outer wall is coated with adhesive-layer, is coated with plastic outer tube on this adhesive-layer outer wall.

3. the plastic tube of band oxidation prevention layer according to claim 1 and 2 is characterized in that, the material of described oxidation prevention layer is an ethylene-vinyl alcohol copolymer.

4. the plastic tube of band oxidation prevention layer according to claim 3 is characterized in that, the material of described plastic inner pipe and plastic outer tube is atactic copolymerized polypropene, refractory polyethylene, crosslinked polyethylene or polybutylene.