CN202266763U

CN202266763U - Double-orientation fiber reinforcement random copolymerization polypropylene three-layer composite pipe

Info

Publication number: CN202266763U
Application number: CN201120395624XU
Authority: CN
Inventors: 应淑妮; 顾彬
Original assignee: Shanghai Weixing New Building Materials Co Ltd
Current assignee: Shanghai Weixing New Building Materials Co Ltd
Priority date: 2011-10-17
Filing date: 2011-10-17
Publication date: 2012-06-06
Anticipated expiration: 2021-10-17

Abstract

The utility model relates to a double-orientation fiber reinforcement random copolymerization polypropylene three-layer composite pipe, which is characterized by comprising a random copolymerization polypropylene pipe wall outer layer (1), a random copolymerization polypropylene pipe wall inner layer (6) and a double-orientation fiber reinforcement layer. An annular fiber reinforcement layer (2) and an axial fiber reinforcement layer (3) are arranged between the random copolymerization polypropylene pipe wall outer layer (1) and the random copolymerization polypropylene pipe wall inner layer (6). The double-orientation fiber reinforcement random copolymerization polypropylene three-layer composite pipe has the advantages that by means of the annular fiber reinforcement layer, pressure resistant performance of pipes is improved; and by means of the axial fiber reinforcement layer, coefficient of linear expansion of the pipes is reduced. By adjusting length of a glass fiber, the coefficient of linear expansion can be reduced to one third to one fourth under the premise that the pressure resistant performance of the pipes is guaranteed. Fiber reinforcement layer resin utilizes toughing random copolymerization polypropylene so that low-temperature impact resistant performance of the pipes is improved. The double-orientation fiber reinforcement random copolymerization polypropylene three-layer composite pipe can be applied to cold and hot water pipes, building main vertical pipes and other industrial pipes.

Description

A kind of fiber reinforcement atactic copolymerized polypropene three-layer composite pipe of double orientation

[technical field]

The utility model relates to the tubing technical field, specifically, is a kind of fiber reinforcement atactic copolymerized polypropene three-layer composite pipe of double orientation.

[background technique]

Atactic copolymerized polypropene (PP-R) pipeline connects a series of good application characteristics such as reliable and is accepted by market because it has health, environmental protection, hot melt; Be present China building water supply with tube material in one of the maximum kind of consumption, and favored by the domestic user.But because its linear expansion coeffcient is bigger, pipeline is yielding when being used for water heating system in practical applications for the PP-R pipeline; When simple PP-R pipe was used for main riser, compressive strength was slightly disliked deficiency etc., more than many drawbacks limit PP-R pipeline further applying in China building water supply market.Merely the PP-R pipeline is carried out axial direction fibre and strengthen, the linear expansion coeffcient of pipeline is obviously descended, the hoop withstand voltage properties is descended to some extent; And the PP-R pipe is carried out the hoop fiber reinforcement, the withstand voltage properties of pipeline can be improved, but the linear expansion coeffcient of pipeline can not be effectively reduced.

[model utility content]

The purpose of the utility model is to overcome the deficiency of existing technology, and a kind of fiber reinforcement atactic copolymerized polypropene three-layer composite pipe of double orientation is provided.

The purpose of the utility model realizes through following technological scheme:

A kind of fiber reinforcement atactic copolymerized polypropene three-layer composite pipe of double orientation is characterized in that, comprises polypropylene random copolymer pipe wall outer (1) and tube wall internal layer (6) and double orientation fiber-reinforced layer; Exist along hoop fiber reinforcement (2) and axial direction fibre between tube wall outer (1) and the tube wall internal layer (6) and strengthen the double-deck enhancement layer of (3);

Said atactic copolymerized polypropene density range: 0.9～1.2g/cm ³, melt index is the resin of 0.25～1.0g/10min;

Reinforcing fiber is glass fibre (4), and fiber quality percentage is 20～30% in every layer of enhancement layer, and fiber diameter is 13～16 μ m, and length of staple is 200 μ m～1000 μ m;

Hoop fiber-reinforced layer (2) and axial direction fibre enhancement layer (3) account for total thickness of pipe wall 50～60%, and hoop fiber-reinforced layer (2) is 2: 1～1: 2 with axial direction fibre enhancement layer (3) thickness ratio;

Need to add compatibilizer MPP in hoop fiber-reinforced layer (2) and axial direction fibre enhancement layer (3) preparation, the mass percent that compatibilizer accounts for enhancement layer is 5%-10%;

Need to add plasticizer in hoop fiber-reinforced layer (2) and axial direction fibre enhancement layer (3) preparation, like HDPE, LLDPE, EVA, PA, POE, PPB etc.Wherein LLDPE consumption range of choice is 5-20%, and the consumption range of choice of HDPE is 5-10%, and the consumption range of choice of EVA is 3-8%, and the consumption range of choice of POE is 5-15%; PPB consumption range of choice is 50%-80%.

A kind of preparation method of fiber reinforcement atactic copolymerized polypropene three-layer composite pipe of double orientation can be through behind the bidirectional layer extruding pipe material, and double-deck canoe is prepared from.

Compared with prior art, the good effect of the utility model is:

The described advantage that has the fiber reinforcement atactic copolymerized polypropene three-layer composite pipe of double orientation of the utility model: through introducing the withstand voltage properties that the hoop fiber-reinforced layer has improved tubing; Introduce the linear expansion coeffcient that the axial direction fibre enhancement layer has reduced tubing.Through regulating the length of glass fibre, can guarantee that linear expansion coeffcient can drop to 1/3 to 1/4 under the high withstand voltage properties prerequisite of tubing.The fiber-reinforced layer resin adopts toughness reinforcing atactic copolymerized polypropene, has improved the low-temperature impact performance of tubing.This model utility can be used for cool and hot water pipe, building main riser and other industrial pipes.

[description of drawings]

Fig. 1 is the radial and axial sectional drawing of double orientation fiber reinforcement atactic copolymerized polypropene three-layer composite pipe; 1a is radial section figure, and 1b is an axial section;

Label in the accompanying drawing is respectively: 1, the polypropylene random copolymer pipe wall is outer; 2, hoop TRPP layer; 3, axial direction fibre RPP layer; 4, glass fibre; 5, toughness reinforcing atactic copolymerized polypropene; 6, atactic copolymerized polypropene internal layer.

[embodiment]

The embodiment of the fiber reinforcement atactic copolymerized polypropene three-layer composite pipe of a kind of double orientation of the utility model below is provided.

Embodiment 1

See also accompanying drawing 1, a kind of fiber reinforcement atactic copolymerized polypropene three-layer composite pipe of double orientation comprises polypropylene random copolymer pipe wall outer (1) and tube wall internal layer (6) and double orientation fiber-reinforced layer.It is characterized in that: exist along hoop fiber reinforcement (2) and axial direction fibre between tube wall outer (1) and the tube wall internal layer (6) to strengthen the double-deck enhancement layer of (3).

A kind of double orientation fiber reinforcement atactic copolymerized polypropene three-layer composite pipe; Specification is the pipeline of φ 90*10, and tube wall is outer by 20% atactic copolymerized polypropene, 20% atactic copolymerized polypropene internal layer; 30% hoop fiber-reinforced layer, 30% axial direction fibre enhancement layer.Wherein, the fibre content in hoop and the axial direction fibre enhancement layer is 25%, and length of staple is 400 μ m-800 μ m, and adds 8% maleic anhydride inoculated polypropylene (MPP) and 50%PPB.In this design pipeline; Each layer reasonable mixture ratio; Fiber and resin have good cementation, make laterally obviously increasing with tensile property longitudinally of pipeline, effectively improve withstand voltage properties, heat resistance, the low temperature resistant fragility of tubing and obviously reduce linear expansion coeffcient.

The above only is the preferred implementation of the utility model; Should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the utility model design; Can also make some improvement and retouching, these improvement and retouching also should be regarded as in the protection domain of the utility model.

Claims

1. the fiber reinforcement atactic copolymerized polypropene three-layer composite pipe of a double orientation is characterized in that, comprises polypropylene random copolymer pipe wall outer and tube wall internal layer and double orientation fiber-reinforced layer; Exist between tube wall skin and the tube wall internal layer along the double-deck enhancement layer of hoop fiber reinforcement and axial direction fibre enhancing.

2. the fiber reinforcement atactic copolymerized polypropene three-layer composite pipe of a kind of double orientation as claimed in claim 1 is characterized in that, described fiber is a glass fibre.

3. the fiber reinforcement atactic copolymerized polypropene three-layer composite pipe of a kind of double orientation as claimed in claim 1; It is characterized in that; Hoop fiber-reinforced layer and axial direction fibre enhancement layer account for total thickness of pipe wall 50～60%, and hoop fiber-reinforced layer (2) is 2: 1～1: 2 with axial direction fibre enhancement layer (3) thickness ratio.