CN105935212B - A high-elastic anti-collision strip and its co-extrusion process - Google Patents

Abstract

The invention relates to the technical field of anti-collision strips, in particular to a high-elasticity anti-collision strip and a co-extrusion process thereof. The invention discloses a high-elasticity anti-collision strip which comprises an elastic arch part and a hard base body connected between two ends of the elastic arch part, wherein the elastic arch part and the hard base body are jointly surrounded to form a hollow cavity, and one side of the hard base body is provided with a clamping jaw used for being connected with an external object; the elastic arch part comprises an elastic substrate layer, a pattern decorative layer and a gloss oil protective layer, wherein the hollow cavity is outwards arranged in sequence; the elastic base material layer is a TPU elastic base material layer, the hard base body is a PVC hard base body, and the clamping jaws are PVC clamping jaws; the elastic base material layer is provided with circular arc portion and two connection edges, and two connection edges are formed by extending the both ends of circular arc portion in opposite directions, and the both ends of stereoplasm base member are connected with the elastic base material layer through two connection edges respectively. The high-elasticity anti-collision strip disclosed by the invention is good in mechanical property, good in anti-collision property, wear-resistant and good in scratch-resistant property; the adhesion strength of the hard matrix and the elastic base material layer is high.

Description

A high-elastic anti-collision strip and its co-extrusion process

technical field

The invention relates to the technical field of anti-collision strips, in particular to a high-elastic anti-collision strip and its co-extrusion process.

Background technique

There are two types of cabinets, doors and windows for home decoration, push-pull and closed. Whether they are push-pull or closed, this type of cabinets, doors and windows are in direct rigid contact with the door frame when in use, that is, when the door is closed. Not only will it make noise, but long-term hard contact will directly damage the door panel and door frame.

Therefore it is necessary to provide a bumper strip that can prevent hard contact.

Contents of the invention

The object of the present invention is to provide a high elastic anti-collision strip with good anti-collision performance aiming at the deficiencies of the prior art.

Another object of the present invention is to provide a co-extrusion process for high-elastic anti-collision strips to address the deficiencies of the prior art, and the produced high-elastic anti-collision strips have good rebound performance and good mechanical properties.

In order to achieve the above object, a high elastic anti-collision strip of the present invention comprises an elastic arch and a hard substrate connected between the two ends of the elastic arch, the elastic arch and the hard substrate are jointly formed to form a hollow cavity, One side of the hard substrate is provided with claws for connecting with external objects; the elastic arch includes an elastic substrate layer, a pattern decoration layer and a varnish protective layer with the hollow cavity facing outward; the elastic substrate layer is TPU The elastic substrate layer, the hard substrate is a PVC rigid substrate, and the claws are PVC claws; the elastic substrate layer is provided with a circular arc portion and two connecting edges, and the two connecting edges are opposite to each other from the two ends of the circular arc portion The two ends of the hard matrix are respectively connected to the elastic base material layer through two connecting edges.

Preferably, the surface roughness Ra of the elastic substrate layer is 7.3 μm to 10.5 μm; the elastic arch part further includes a primer ink layer, and the primer ink layer is arranged between the elastic substrate layer and the pattern decoration layer .

Preferably, the claw is provided with a vertical portion connected to the hard substrate, the end of the vertical portion is provided with a barb portion, and the claw is provided with two, the angle a between the two vertical portions 7°~25°.

A kind of co-extrusion process of high elasticity anti-collision strip of the present invention comprises the following steps:

A. Extrude the hard substrate raw material made of PVC and the elastic substrate layer raw material made of TPU through a co-extrusion process to form a high-elastic anti-collision strip with a hard substrate and an elastic substrate layer. The elastic substrate layer and the hard substrate The common enclosure forms a hollow cavity;

B, cooling and solidifying the highly elastic anti-collision strip prepared in step A.

Preferably, in the step A, the extrusion temperature of the hard matrix raw material is 125°C-140°C, and the extrusion temperature of the elastic substrate layer raw material is 145°C-168°C.

Preferably, in the step A, the extrusion temperature of the hard matrix raw material is 130°C to 138°C, and the extrusion temperature of the elastic substrate layer raw material is 148°C to 153°C.

Preferably, in the step A, before the extrusion processing, the drying treatment is carried out first, so that the water content of the hard matrix raw material made of PVC is 0.01%~0.03%, and the water content of the elastic base material layer raw material made of TPU is 0.01%~0.03%. It is 0.007%~0.02%.

Preferably, in the step A, the temperature of the high elastic anti-collision strip in the setting stage is controlled to 56°C~68°C, and the temperature is kept for 6min~10min; in step B, the cooling rate of the high elastic anticollision strip is 8 ℃/s ~14℃/s.

Beneficial effects of the present invention: In the highly elastic anti-collision strip of the present invention, the hollow cavity and the elastic arch act as an elastic buffer. When an external object collides with the elastic arch, the elastic arch squeezes the hollow cavity to produce elastic deformation, acting on the When the external force of the elastic arch is removed, the elastic arch resumes its deformation, avoiding damage to external objects due to being bumped, and avoiding noise caused by hard collisions. The high-elastic high-elastic anti-collision strip of the present invention has good anti-collision performance, and the hollow cavity improves the ability of the elastic arch to recover from deformation; the pattern decoration layer is printed on the elastic base material layer to play a decorative role, which can make the present invention The pattern of the high-elastic anti-collision strip is more coordinated and beautiful with the surrounding objects, and the patterned decorative layer can be stably attached to the elastic substrate layer; the varnish protective layer is used to protect the patterned decorative layer and improve the wear resistance of the patterned decorative layer 1. Scratch resistance performance; the adhesion strength between the hard substrate and the elastic substrate layer is high, and a high-elastic anti-collision strip co-extrusion process of the present invention produces a high-elastic anti-collision strip with good resilience performance and good mechanical properties.

Description of drawings

Fig. 1 is a cross-sectional schematic diagram of a high elastic anti-collision strip of the present invention.

Reference signs include:

1—hollow cavity

201—arc portion 202—connecting edge

21—elastic substrate layer 22—priming ink layer 23—pattern decoration layer

24—Varnish protective layer

3—hard substrate

4—jaw

41—vertical portion 42—barb portion

a—the angle between two vertical parts.

Detailed ways

The present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in Figure 1, a high elastic anti-collision strip of the present invention comprises an elastic arch and a hard matrix 3 connected between the two ends of the elastic arch, and the elastic arch and the hard matrix 3 are jointly formed to form a Hollow cavity 1, one side of the hard substrate 3 is provided with claws 4 for connecting with external objects; the elastic arch part includes the elastic base material layer 21, the pattern decoration layer 23 and the varnish protective layer which are sequentially arranged outwards from the hollow cavity 1 twenty four.

The hollow cavity 1 and the elastic arch act as an elastic buffer. When an external object collides with the elastic arch, the elastic arch squeezes the hollow cavity 1 and undergoes elastic deformation. When the external force acting on the elastic arch is removed, the elastic arch resumes its deformation, avoiding The external objects are damaged due to being hit, so as to avoid the noise caused by hard collision. The highly elastic and highly elastic anti-collision strip with a decorative layer of the present invention has good anti-collision performance, and the hollow cavity 1 improves the ability of the elastic arch to recover from deformation; ink is printed on the elastic base material layer 21, and the ink is cured to form patterns Decorative layer 23, pattern decorative layer 23 is printed on elastic base material layer 21, plays the effect of decoration, can make the pattern of high elastic anti-collision strip of the present invention and surrounding objects more harmonious, attractive in appearance; Varnish protective layer 24 is used for The pattern decoration layer 23 is protected, and the wear resistance and scratch resistance of the pattern decoration layer 23 are improved.

Preferably, the elastic substrate layer 21 is a TPU elastic substrate layer 21, the hard substrate 3 is a PVC rigid substrate 3, and the claws 4 are PVC claws 4; the elastic substrate layer 21 is provided with a circular arc portion 201 and two connecting edges 202, the two connecting edges 202 are formed by the two ends of the arc portion 201 extending toward each other, and the two ends of the hard substrate 3 are respectively connected to the elastic base material layer 21 through the two connecting edges 202; The surface roughness Ra of the substrate layer 21 is 7.3 μm-10.5 μm; the elastic arch part also includes a primer ink layer 22 , and the primer ink layer 22 is arranged between the elastic substrate layer 21 and the pattern decoration layer 23 .

Specifically, the material of the elastic base material layer 21 is TPU, the material of the hard substrate 3 and the jaws 4 is PVC, TPU has good elasticity, is suitable for printing patterns, and has good co-extrusion performance with the jaws 4 made of PVC.

In a high-elastic anti-collision strip of the present invention, when the elastic arch is squeezed, the root of the arc portion 201 is stressed, and stress concentration is prone to occur at the joints where different materials are bonded by co-extrusion. The arc portion 201 is connected to The side 202 is the same material, and the arc portion 201 is co-extruded and bonded with the hard substrate 3 by connecting the side 202, so as to avoid stress concentration at the root of the arc portion 201, avoid cracking at the root of the arc portion 201, and improve the present invention. The reliability of the high elastic anti-collision strip.

In order to improve the adhesion effect of the ink and prevent the decorative pattern layer 23 or the varnish protective layer 24 from falling off, the surface roughness Ra of the elastic substrate layer 21 is 6.3 μm˜12.5 μm. The highly elastic anti-collision strip of the invention has stable patterns, is not suitable for falling off, and has good stability.

The pattern or color of the priming ink layer 22 is used as the base color of the elastic arch, so that the pattern decoration effect of the present invention is better.

The co-extrusion process has low production cost and high processing efficiency, and is suitable for mass production. The elastic base material layer 21 made of TPU, the hard substrate 3 made of PVC, and the jaws 4 are formed by co-extrusion, and the connection performance is good.

Preferably, the claw 4 is provided with a vertical portion 41 connected to the hard substrate 3, the end of the vertical portion 41 is provided with a barb portion 42, and the claw 4 is provided with two, two vertical portions The angle a between 41 is 7°~25°. The barb portion 42 is used for hooking external objects and improving the connection stability of the high elastic anti-collision strip of the present invention. When the angle a between the two vertical parts 41 is 7°-25°, it is convenient to embed the high elastic anti-collision strip of the present invention into the external object, and the connection with the external object is stable and not easy to fall off.

Embodiment one.

A kind of co-extrusion process of high elasticity anti-collision strip of the present invention comprises the following steps:

A, extruding the raw materials of the hard base material 3 of PVC material and the elastic base material layer 21 of TPU material through a co-extrusion process to form a high-elastic anti-collision strip with the hard base material 3 and the elastic base material layer 21, the elastic base material layer 21 and the hard matrix 3 are jointly surrounded to form a hollow cavity 1; the extrusion temperature of the raw material of the hard matrix 3 can be 125 ° C, and the extrusion temperature of the raw material of the elastic base layer 21 is 145 ° C; before the extrusion process, first Carry out drying treatment, make the water content of the hard substrate 3 raw material of PVC material can be 0.01%, the water content of the elastic base material layer 21 raw material of TPU material should be controlled to be 0.007%; The working principle of extrusion process is generally, extrusion The machine heats the raw materials and extrudes the high-elastic anti-collision strip from the die of the machine head. After the high-elastic anti-collision strip comes out of the die, it is shaped by the shaping device and cooled by the cooling device. The invention makes the high-elastic anti-collision strip in the shaping stage The temperature of the bar was controlled at 56°C and kept warm for 6 minutes.

B, cooling and solidifying the highly elastic anti-collision strip prepared in step A. The cooling rate of the high elastic anti-collision strip is 8°C/s.

A high-elastic anti-collision strip co-extrusion process of the present invention makes the hard substrate 3 raw material of PVC material and the elastic substrate layer 21 raw material of TPU material form a high-elastic anti-collision strip through the co-extrusion process, and the hard substrate 3 and the elastic The tensile strength between the substrate layers 21 is high, and the mechanical properties are good; the elastic substrate layer 21 made of TPU has high elasticity, low sound when impacted, stable performance, and long service life; a high-elastic anti-collision strip of the present invention has a total Extrusion process, the elastic substrate layer 21 made of TPU material produced has suitable surface tension, high ink adhesion, and the pattern decoration layer 23 has stable performance and will not fall off.

Embodiment two.

The difference between this embodiment and Embodiment 1 is that in the step A, the extrusion temperature of the raw material of the hard substrate 3 is 128°C, and the extrusion temperature of the raw material of the elastic substrate layer 21 is 147°C. , carry out drying treatment first, make the water content of the hard matrix 3 raw materials of PVC material be 0.018%, make the water content of the elastic base material layer 21 raw materials of TPU material should be controlled to be 0.01% simultaneously; The temperature of the bar is controlled at 58°C and kept for 8.6 minutes;

In the step B, the cooling rate of the high elastic anti-collision strip is 9° C./s.

The rest of this embodiment is the same as that of Embodiment 1, and the features not explained in this embodiment are explained in Embodiment 1, and will not be repeated here.

Embodiment three.

The difference between this embodiment and Embodiment 1 is that in the step A, the extrusion temperature of the raw material of the hard substrate 3 is 134°C, and the extrusion temperature of the raw material of the elastic substrate layer 21 is 156°C. , carry out drying treatment first, make the water content of the hard substrate 3 raw materials of PVC material be 0.025%, make the water content of the elastic base material layer 21 raw materials of TPU material should be controlled to be 0.015% simultaneously; The temperature of the bar is controlled at 62°C and kept for 9.4 minutes;

In the step B, the cooling rate of the high elastic anti-collision strip is 12° C./s.

The rest of this embodiment is the same as that of Embodiment 1, and the features not explained in this embodiment are explained in Embodiment 1, and will not be repeated here.

Embodiment four.

The difference between this embodiment and Embodiment 1 is that in the step A, the extrusion temperature of the raw material of the hard substrate 3 is 140°C, and the extrusion temperature of the raw material of the elastic substrate layer 21 is 168°C. , carry out drying treatment first, make the water content of the hard matrix 3 raw materials of PVC material be 0.03%, make the water content of the elastic substrate layer 21 raw materials of TPU material should be controlled to be 0.02% simultaneously; The temperature of the bar is controlled at 68°C and kept warm for 10 minutes;

In the step B, the cooling rate of the high elastic anti-collision strip is 14° C./s.

The rest of this embodiment is the same as that of Embodiment 1, and the features not explained in this embodiment are explained in Embodiment 1, and will not be repeated here.

The high elastic anti-collision strip produced in embodiment 1～4 is detected, and test data and conclusion are as follows:

The specific methods used in the above tests are:

1. 180° peel strength test: measure the peel strength between the connecting edge 202 and the hard substrate 3 .

2. Resilience test: Fix the hard matrix 3 of the high-elastic anti-collision strip produced in different embodiments horizontally, use a 50Kg weight to act vertically on the elastic arch, and keep it for 100h, then remove the weight, and test After 2s, the height of the elastic arch after rebounding, and the height after rebounding compared with the original height is the rebound rate;

3. Impact sound test: Fix the hard substrate 3 of the high-elastic anti-collision strip produced in different implementations horizontally, use a 1Kg weight to freely fall from a height of 1m from the high-elastic anti-collision strip, and test the impact height of the heavy object. The sound made by the elastic bumper;

4. Ink peeling rate test: After printing the pattern decorative layer 23, take a sample of the elastic substrate layer 21 with a length of 20 cm and a width of 2 cm at the same position of the pattern in different embodiments, and stick it to the printing surface with the same adhesive tape respectively. combined, and rolled with a pressure roller with a load of 20N, and then made into a sample with a length of 20cm and a width of 1.5cm, then measure the T-peel strength of the sample, the peeling speed is V=250mm/min, and measure the residue on the adhesive tape. The area of the pattern, the ratio of the area of the remaining pattern on the adhesive tape to the area of the sample is the ink peeling rate.

It can be seen from the above table that the highly elastic anti-collision strip prepared by the present invention has excellent mechanical properties, good rebound performance, and the patterned decorative layer 23 is stable.

To sum up, it can be known that the present invention has the above-mentioned excellent characteristics, which enables it to improve the performance that is not available in the prior art in use, and has practicability, and becomes a product with great practical value.

The above content is only a preferred embodiment of the present invention. For those of ordinary skill in the art, according to the idea of the present invention, there will be changes in the specific implementation and application scope. limits.

Claims (5)

1. a kind of high resiliency anticollision strip, including elastic arch and the hard substrate that is connected between elastic arch both ends, feature It is：Elastic arch and hard substrate are enclosed to form hollow cavity, the side of hard substrate be provided with for external object The claw of part connection；Elastic arch includes that hollow cavity is protected towards elastic substrate layer, figure line decorative layer and the gloss oil set gradually outside Sheath；The elastic substrate layer is TPU elastic substrate layers, and hard substrate is PVC hard substrates, and claw is PVC card pawl；The bullet Property substrate layer be provided with arc sections and two connection sides, two connection sides are extended towards by the both ends of arc sections and are formed, hard base The both ends of body are connect by two connection sides with elastic substrate layer respectively；

The surface roughness Ra of the elastic substrate layer is 7.3 μm~10.5 μm；The elasticity arch further includes bottoming ink layer, Bottoming ink layer is set between elastic substrate layer and figure line decorative layer.

2. a kind of high resiliency anticollision strip according to claim 1, it is characterised in that：The claw is provided with and hard substrate The end of the vertical portion of connection, vertical portion is provided with barb, and there are two the claw settings, the angle between two vertical portions A is 7 °~25 °.

3. a kind of high resiliency anticollision strip coextrusion process, which is characterized in that including following process：

A, the elastic substrate layer raw material of the hard substrate raw material of PVC material and TPU materials is extruded into tool by coextrusion process There are the high resiliency anticollision strip of hard substrate and elastic substrate layer, elastic substrate layer to be enclosed to form with hard substrate hollow Chamber；

B, high resiliency anticollision strip made from step A is cooling, solidification；

In the step A, 125 DEG C~140 DEG C of the extrusion temperature of hard substrate raw material, the extrusion temperature of elastic substrate layer raw material is 145 DEG C~168 DEG C；

In the step A, before squeezing out processing, first it is dried, makes the water content of the hard substrate raw material of PVC material It is 0.01%~0.03%, it is 0.007%~0.02% to make the water content of the elastic substrate layer raw material of TPU materials.

4. a kind of high resiliency anticollision strip coextrusion process according to claim 3, it is characterised in that：In the step A, hard The extrusion temperature of 130 DEG C~138 DEG C of the extrusion temperature of matrix material, elastic substrate layer raw material is 148 DEG C~153 DEG C.

5. a kind of high resiliency anticollision strip coextrusion process according to claim 3, it is characterised in that：In the step A, it is fixed to make The temperature control of the high resiliency anticollision strip in type stage is 56 DEG C~68 DEG C, and keeps the temperature 6min~10min；In stepb, make high-elastic Property anticollision strip cooling velocity be 8 DEG C/s~14 DEG C/s.