Thermal insulation filling

Abstract

Provided is a heat-insulating filler that is made of chemical fiber, has a good hand feel, high bulkiness, excellent heat-insulating performance, and is not easily entangled and lumped during washing. 【Solution means】It is composed of particles having an irregular burr and a tail in a spherical head, formed by mixing and twisting a three-dimensional bicomponent chemical fiber and an ultrafine chemical fiber. The weight percentage of the three-dimensional bicomponent chemical fiber is 30 to 60%, the fineness is 2D to 6D, and the length is 15 to 45 mm. The weight percentage of the ultrafine chemical fiber is 40 to 70%, the fineness is 2D or less, and the length is 15 to 45 mm. Thereby, the characteristics of good hand feel, excellent bulkiness and heat insulation, and not easily entangled during washing are realized.

Description

Technical Field

[0001] The present invention belongs to the technical field of textile materials, relates to textile fillers, and particularly relates to heat-insulating fillers.

Background Art

[0002] Down is the currently known material with the highest heat insulation performance. However, the price of down is relatively high, and it is used as a filler for mid- to high-end products. However, down has an obvious drawback compared with chemical fibers, that is, when down is in a wet state, its heat insulation performance significantly decreases. On the other hand, chemical fibers are inexpensive and have excellent formability, and are processed as various fillers instead of down. The filling material of chemical fibers has low hygroscopicity and does not reduce the heat insulation performance in a wet environment.

[0003] As chemical fiber fillers directly filled instead of down currently on the market, generally, there are directly-opened chemical fiber fillers and particle fillers formed by binding chemical fibers into spherical shapes.

[0004] There are two processes for directly opening chemical fibers. One is to directly open the fibers with a two-dimensional structure. This filler has the characteristic of a soft touch, but its bulkiness is not good and the heat insulation effect is poor. The other is to directly open the fibers with a three-dimensional structure. This filler has high bulkiness, but a rough touch and is prone to tangling and forming lumps during washing.

[0005] The particle filler formed by winding chemical fibers into a spherical shape has a better performance than direct filling fibers in terms of the phenomenon of entanglement and agglomeration during washing, but its heat preservation performance is not good. Here, the large-particle foamed polyethylene of the prior art is mostly manufactured with three-dimensional spiral structure fibers. The fibers are relatively thick, the touch is rough, the sphere of the particles is relatively large, the inside of the sphere is hollowed out, the porosity between the spheres is relatively large, the bulkiness is completely supported by the large spheres, the density is relatively poor, air convection is likely to occur, and the heat preservation effect cannot be fully exerted. Some small-particle foamed polyethylene of the prior art needs to perform winding with higher output and longer time during production to achieve the effect of small particles. The silicone oil on the fiber surface is destroyed and the smoothness is reduced. The sphere structure becomes dense and rough, the three-dimensional spiral spring structure of the fiber is destroyed, and the bulkiness is reduced.

Summary of the Invention

Problems to be Solved by the Invention

[0006] The problem to be solved by the present invention is to overcome the defects existing in the prior art and provide a heat preservation filler made of chemical fibers, having a good touch, high bulkiness, excellent heat preservation performance, and being not easily entangled and agglomerated during washing.

Means for Solving the Problems

[0007] In order to solve the above problems, the present invention adopts the following technical solutions.

[0008] A heat preservation filler, comprising particles having irregular burrs and tails on a spherical head formed by mixing and winding three-dimensional bicomponent chemical fibers and ultra-fine chemical fibers. The weight percentage of the three-dimensional bicomponent chemical fibers is 30% - 60%, the fineness is 2D - 6D, the length is 15 - 45 mm, the weight percentage of the ultra-fine chemical fibers is 40% - 70%, the fineness is 2D or less, and the length is 15 - 45 mm.

[0009] When adopting the above technical solution, the heat-insulating filling material of the present invention is composed of particles having irregular burrs and tails in a spherical shape formed by twisting three-dimensional bicomponent chemical fibers and ultra-fine chemical fibers. Here, the ultra-fine chemical fibers ensure the touch, the three-dimensional bicomponent chemical fibers have a predetermined elasticity, can improve the bulkiness, there are a rough support layer and a fine divided layer in the spherical particles, the density is relatively high, and at the same time, the irregular burrs and tails improve the structural adhesion between the spherical particles, reduce the gaps, increase the density between the particles, are similar to the down form, reduce the air flow and realize a long-term heat-insulating effect. In addition, the shape having irregular burrs and tails in a spherical shape reduces the entanglement of the particles during washing with water and reduces the phenomenon that the fibers are entangled and agglomerated into lumps.

[0010] In a specific embodiment of the present invention, the diameter of the spherical head is 5 to 15 mm, and the length of the tail is 15 to 40 mm.

[0011] In a specific embodiment of the present invention, the three-dimensional bicomponent chemical fiber is a bicomponent polyester fiber, or a polyester·polylactic acid fiber, or a bicomponent polylactic acid fiber.

[0012] In a specific embodiment of the present invention, the ultra-fine chemical fiber is an ultra-fine polyester fiber.

Advantages of the Invention

[0013] Therefore, as can be seen from the above detailed description, the heat-insulating filling material of the present invention has advantages such as good touch, high bulkiness, excellent heat-insulating performance, and being not easily entangled and agglomerated into lumps during washing with water.

Brief Description of the Drawings

[0014] Hereinafter, the present invention will be described in more detail with reference to the drawings and specific embodiments.

[0015]

Figure 1

Figure 2

Mode for Carrying Out the Invention

[0016] Example 1 The manufacturing process of the heat-insulating filler of this example is as follows.

[0017] Step of weighing at a predetermined mixing ratio: The three-dimensional two-component chemical fiber adopts a two-component polyester fiber, with a weight percentage of 45%, a fineness of 2.5 D, and a length of 32 mm. The ultra-fine chemical fiber adopts an ultra-fine polyester fiber, with a weight percentage of 55% or less, a fineness of 1.5 D, and a length of 25 mm.

[0018] Step of pre-mixing by hand: The three-dimensional two-component chemical fiber and the ultra-fine chemical fiber formed at a predetermined mixing ratio are put into a transition curtain, and pre-mixed while being dispersed by hand to form a pre-mixture by hand.

[0019] Step of pre-mixing in a mixing chamber: The pre-mixture formed by hand is transferred to the mixing chamber through the transition curtain, and sufficiently stirred by three mixing rolls to be more uniformly mixed, and the pre-mixture in the mixing chamber is formed.

[0020] Step of precision mixing in a storage chamber: The pre-mixture in the mixing chamber is sent into the storage chamber by the conveying curtain of the mixing chamber, and precision mixing is realized in the circulating mode of the spike can, and the materials are sufficiently fused to form a precision mixture.

[0021] Step of opening the raw material fibers: The precision mixture is re-transferred to the leather conveyor of the fiber opening machine through the spike curtain in the storage chamber, introduced into the fiber opening machine, and sufficiently opened by a cylinder and eight card clothing operating rolls to form an opened fiber material.

[0022] Pre - forming and precision mixing process: Through the air duct, using the air convection method, the opened fiber is blown into the relay storage chamber, and precision mixing is carried out again. At the same time, pre - forming is carried out using air convection to form wool balls, and a pre - formed and precision mixture is formed. Here, the wind speed blown from the blower into the duct is 1200 m / h, and the wind temperature is at room temperature.

[0023] Forming process by winding into a sphere: By means of a suction - type blower, the pre - formed and precision mixture is sucked into the forming equipment for winding into a sphere to form a particle - shaped molded product. The wind speed blown from the blower is 1200 m / h, and the wind temperature is at room temperature.

[0024] Cooling and shaping process: The particle - shaped molded product is blown into the transfer chamber by a blower, and heat is dissipated by concentrated cooling with room - temperature cold air for shaping. As a result, the heat - insulating filling material is formed. Finally, it is blown into a vertical packaging machine by a short - blade cutter through the blower for weighing. Example 2

[0025] The manufacturing process of the heat - insulating filling material in this example is as follows.

[0026] Weighing process at a predetermined mixing ratio: For the three - dimensional two - component chemical fiber, two - component polyester fiber is adopted, with a weight percentage of 50%, a fineness of 3D, and a length of 32 mm. For the ultra - fine chemical fiber, ultra - fine polyester fiber is adopted, with a weight percentage of 50%, a fineness of 2D, and a length of 25 mm.

[0027] Manual pre - mixing process: The three - dimensional two - component chemical fiber and the ultra - fine chemical fiber formed at a predetermined mixing ratio are placed in a transition curtain, and pre - mixed manually while being dispersed to form a manual pre - mixture.

[0028] Pre - mixing process in the mixing chamber: The manual pre - mixture is moved into the mixing chamber through the transition curtain and sufficiently stirred by three mixing rolls to be more uniformly mixed, and the pre - mixture in the mixing chamber is formed.

[0029] Process of precise mixing in the storage chamber: The preliminary mixture in the mixing chamber is sent into the storage chamber by the transfer curtain of the mixing chamber. In the circulation mode of the spike curtain, precise mixing is realized, the materials are fully fused, and a precise mixture is formed.

[0030] Process of opening the raw materials: The precise mixture is re-transferred to the leather conveyor of the fiber opening machine through the spike curtain in the storage chamber, introduced into the fiber opening machine, and fully opened by the cylinder and eight card clothing operating rolls to form an opened product.

[0031] Preliminary forming and precise mixing process: Using the air convection method through the air duct, the opened product is blown into the relay storage chamber to perform precise mixing again, and at the same time, using air convection for preliminary forming to form wool balls, and a preliminary formed and precise mixture is formed. Here, the wind speed blown from the blower into the duct is 1200 m / h, and the air temperature is normal temperature.

[0032] Process of forming by winding into a sphere: The preliminary formed and precise mixture is sucked into the forming equipment for winding into a sphere by a suction type blower and wound into a sphere to form a particle molded product. The wind speed blown from the blower is 1200 m / h, and the air temperature is normal temperature.

[0033] Cooling and shaping process: The particle molded product is blown into the transfer chamber by a blower, and heat is dissipated by centralized cooling with normal temperature cold air for shaping. As a result, the heat preservation filling material is formed. Finally, it is blown into the vertical packaging machine by a short blade cutter through the blower for weighing. Example 3

[0034] The manufacturing process of the heat preservation filling material in this example is as follows.

[0035] Process of weighing according to a predetermined mixing ratio: The three-dimensional two-component chemical fiber adopts two-component polyester fiber, with a weight percentage of 40%, a fineness of 6 D, and a length of 32 mm. The ultra-fine chemical fiber adopts ultra-fine polyester fiber, with a weight percentage of 60%, a fineness of 0.8 D, and a length of 25 mm.

[0036] Pre-mix manually: Put three-dimensional two-component chemical fibers and ultra-fine chemical fibers formed in a predetermined blending ratio into the transition curtain, and pre-mix them while dispersing manually to form a pre-mixture manually.

[0037] Process of pre-mixing in the mixing chamber: Transfer the pre-mixture formed manually to the mixing chamber through the transition curtain, and stir it sufficiently with three mixing rolls to mix it more uniformly, and form the pre-mixture in the mixing chamber.

[0038] Process of precise mixing in the storage chamber: Feed the pre-mixture in the mixing chamber into the storage chamber by the conveying curtain of the mixing chamber, and realize precise mixing in the circulating mode of the spike can, fully fuse the materials, and form a precise mixture.

[0039] Raw material fiber opening process: Re-transfer the precise mixture to the leather conveyor of the fiber opener through the spike curtain in the storage chamber, introduce it into the fiber opener, and open the fibers sufficiently with a cylinder and eight card clothing operating rolls to form an opened fiber material.

[0040] Pre-forming and precise mixing process: Use the air convection method through the air duct to blow the opened fiber material into the relay storage chamber, perform precise mixing again, and pre-form using air convection to form wool balls, and form a pre-formed and precise mixture. Here, the wind speed blown from the blower into the duct is 1200 m / h, and the air temperature is normal temperature.

[0041] Process of forming by twisting into a sphere: Use a suction type blower to suck the pre-formed and precise mixture into the forming equipment for twisting into a sphere to form a spherical shape, and form a particle molded product. The wind speed blown from the blower is 1200 m / h, and the air temperature is normal temperature.

[0042] Cooling and shaping process: Use a blower to blow the particle molded product into the transfer chamber, dissipate heat by centralized cooling with normal temperature cold air for shaping, and as a result, form the heat preservation filling material. Finally, blow it into the vertical packaging machine through a short blade cutter via the blower for weighing.

[0043] The particles in the heat-insulating fillers manufactured in the above Examples 1 to 3 are all in the form shown in Fig. 1, having a spherical head and irregular burrs and tails attached. The diameter of the spherical head is 5 to 15 mm, and the length of the tail is 15 to 40 mm. Through visual observation and touch, it was confirmed that the heat-insulating filler has a high bulk density and feels smooth and fine to the touch.

[0044] In addition, for the heat-insulating fillers manufactured in the above Example 3, heat-insulating performance and water-washing performance tests were respectively carried out. 1. Heat-insulating performance test

[0045] 1.1 Test method: The heat-insulating performance test was carried out in accordance with GB / T 11048-2018.

[0046] 1.2 The test results are as follows. JPEG0003252159000002.jpg48170

[0047] The above test results show that the heat-insulating performance (400 GSM) of the heat-insulating fillers manufactured in Examples 1 to 3 is 6.73 to 7.57 CLO. On the other hand, as shown in Fig. 2, a general small pearl ball filler (having only a spherical head and no burrs and tails) has a heat-insulating performance (400 GSM) of 6.03 to 6.54 CLO. The heat-insulating performance of the heat-insulating filler of the present invention is significantly superior to that of ordinary small pearl ball fillers. 2. Water-washing performance test

[0048] 2.1 Test method: At a water temperature of 40 °C, use a Type A washing machine to perform water washing with a 4N program, and after each washing, use a drum to dry at 50 °C. Observe after performing water washing 3 times and drying 3 times.

[0049] 2.2 The test results are as follows. JPEG0003252159000003.jpg47170

[0050] The above test results show that the heat-insulating filler of the present invention has the advantage that it does not get entangled and form lumps after being washed with water.

[0051] In addition, since the polyester / polylactic acid fiber and the bicomponent polylactic acid fiber have properties similar to those of the bicomponent polyester fiber, the three-dimensional bicomponent chemical fiber of the present invention may employ a polyester / polylactic acid fiber or a bicomponent polylactic acid fiber in addition to the bicomponent polyester fiber. For the ultra-fine chemical fiber, in addition to employing the ultra-fine polyester fiber, other chemical fibers having a predetermined bulkiness containing silicon such as ultra-fine polylactic acid may be employed.

Claims

1. It consists of particles having irregular burrs and tails on a spherical head formed by mixing and twisting a three-dimensional two-component chemical fiber and an ultrafine chemical fiber. The weight percentage of the three-dimensional two-component chemical fiber is 30 to 60%, the fineness is 2D to 6D, the length is 15 to 45 mm, the weight percentage of the ultrafine chemical fiber is 40 to 70%, the fineness is 2D or less, and the length is 15 to 45 mm. A heat-insulating filler characterized by the above.

2. The heat-insulating filler according to claim 1, characterized in that the diameter of the spherical head is 5 to 15 mm and the length of the tail is 15 to 40 mm.

3. The heat-insulating filler according to claim 1, characterized in that the three-dimensional two-component chemical fiber is a two-component polyester fiber, or a polyester / polylactic acid fiber, or a two-component polylactic acid fiber.

4. The heat-insulating filler according to claim 1, characterized in that the ultrafine chemical fiber is an ultrafine polyester fiber.

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